libview/ev-view.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *  Copyright (C) 2004 Red Hat, Inc
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <math.h>
  25 #include <string.h>
  26
  27 #include <glib/gi18n-lib.h>
  28 #include <gtk/gtk.h>
  29 #include <gdk/gdkkeysyms.h>
  30
  31 #include "ev-mapping.h"
  32 #include "ev-document-forms.h"
  33 #include "ev-document-images.h"
  34 #include "ev-document-links.h"
  35 #include "ev-document-misc.h"
  36 #include "ev-document-transition.h"
  37 #include "ev-pixbuf-cache.h"
  38 #include "ev-transition-animation.h"
  39 #include "ev-view-marshal.h"
  40 #include "ev-document-annotations.h"
  41 #include "ev-annotation-window.h"
  42 #include "ev-view.h"
  43 #include "ev-view-accessible.h"
  44 #include "ev-view-private.h"
  45 #include "ev-view-type-builtins.h"
  46
  47 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  48 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  49 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  50
  51 enum {
  52         PROP_0,
  53         PROP_CONTINUOUS,
  54         PROP_DUAL_PAGE,
  55         PROP_FULLSCREEN,
  56         PROP_PRESENTATION,
  57         PROP_SIZING_MODE,
  58         PROP_ZOOM,
  59         PROP_ROTATION,
  60         PROP_HAS_SELECTION,
  61 };
  62
  63 enum {
  64         SIGNAL_BINDING_ACTIVATED,
  65         SIGNAL_HANDLE_LINK,
  66         SIGNAL_EXTERNAL_LINK,
  67         SIGNAL_POPUP_MENU,
  68         N_SIGNALS,
  69 };
  70
  71 enum {
  72         TARGET_DND_URI,
  73         TARGET_DND_TEXT,
  74         TARGET_DND_IMAGE
  75 };
  76
  77 static guint signals[N_SIGNALS];
  78
  79 typedef enum {
  80         EV_VIEW_FIND_NEXT,
  81         EV_VIEW_FIND_PREV
  82 } EvViewFindDirection;
  83
  84 #define ZOOM_IN_FACTOR  1.2
  85 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  86
  87 #define SCROLL_TIME 150
  88
  89 /*** Scrolling ***/
  90 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  91                                                               GtkAdjustment      *hadjustment,
  92                                                               GtkAdjustment      *vadjustment);
  93 static void       view_update_range_and_current_page         (EvView             *view);
  94 static void       set_scroll_adjustment                      (EvView             *view,
  95                                                               GtkOrientation      orientation,
  96                                                               GtkAdjustment      *adjustment);
  97 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
  98                                                               guint               keyval,
  99                                                               GdkModifierType modifiers,
 100                                                               GtkScrollType       scroll,
 101                                                               gboolean            horizontal);
 102 static void       ensure_rectangle_is_visible                (EvView             *view,
 103                                                               GdkRectangle       *rect);
 104
 105 /*** Geometry computations ***/
 106 static void       compute_border                             (EvView             *view,
 107                                                               int                 width,
 108                                                               int                 height,
 109                                                               GtkBorder          *border);
 110 static void       get_page_y_offset                          (EvView             *view,
 111                                                               int                 page,
 112                                                               int                *y_offset);
 113 static gboolean   get_page_extents                           (EvView             *view,
 114                                                               gint                page,
 115                                                               GdkRectangle       *page_area,
 116                                                               GtkBorder          *border);
 117 static void       view_rect_to_doc_rect                      (EvView             *view,
 118                                                               GdkRectangle       *view_rect,
 119                                                               GdkRectangle       *page_area,
 120                                                               EvRectangle        *doc_rect);
 121 static void       doc_rect_to_view_rect                      (EvView             *view,
 122                                                               int                 page,
 123                                                               EvRectangle        *doc_rect,
 124                                                               GdkRectangle       *view_rect);
 125 static gboolean   get_dual_even_left                         (EvView             *view);
 126 static void       find_page_at_location                      (EvView             *view,
 127                                                               gdouble             x,
 128                                                               gdouble             y,
 129                                                               gint               *page,
 130                                                               gint               *x_offset,
 131                                                               gint               *y_offset);
 132 static void       doc_point_to_view_point                    (EvView             *view,
 133                                                               int                 page,
 134                                                               EvPoint            *doc_point,
 135                                                               GdkPoint           *view_point);
 136 /*** Hyperrefs ***/
 137 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 138                                                               gdouble             x,
 139                                                               gdouble             y);
 140 static char*      tip_from_link                              (EvView             *view,
 141                                                               EvLink             *link);
 142 /*** Forms ***/
 143 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 144                                                                gdouble            x,
 145                                                                gdouble            y);
 146
 147 /*** Annotations ***/
 148 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 149                                                               gdouble             x,
 150                                                               gdouble             y);
 151 static void          show_annotation_windows                 (EvView             *view,
 152                                                               gint                page);
 153 static void          hide_annotation_windows                 (EvView             *view,
 154                                                               gint                page);
 155 /*** GtkWidget implementation ***/
 156 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 157                                                               GtkRequisition     *requisition);
 158 static void       ev_view_size_request_continuous            (EvView             *view,
 159                                                               GtkRequisition     *requisition);
 160 static void       ev_view_size_request_dual_page             (EvView             *view,
 161                                                               GtkRequisition     *requisition);
 162 static void       ev_view_size_request_single_page           (EvView             *view,
 163                                                               GtkRequisition     *requisition);
 164 static void       ev_view_size_request                       (GtkWidget          *widget,
 165                                                               GtkRequisition     *requisition);
 166 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 167                                                               GtkAllocation      *allocation);
 168 static void       ev_view_realize                            (GtkWidget          *widget);
 169 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 170                                                               GdkEventScroll     *event);
 171 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 172                                                               GdkEventExpose     *event);
 173 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 174 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 175                                                               GdkEventButton     *event);
 176 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 177                                                               GdkEventMotion     *event);
 178 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 179                                                               GdkEventButton     *event);
 180 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 181                                                               GdkEventCrossing   *event);
 182 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 183                                                               GdkEventCrossing   *event);
 184 static void       ev_view_style_set                          (GtkWidget          *widget,
 185                                                               GtkStyle           *old_style);
 186 static void       ev_view_remove_all                         (EvView             *view);
 187
 188 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 189
 190 /*** Drawing ***/
 191 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 192 static void       draw_rubberband                            (GtkWidget          *widget,
 193                                                               GdkWindow          *window,
 194                                                               const GdkRectangle *rect,
 195                                                               guchar              alpha);
 196 static void       highlight_find_results                     (EvView             *view,
 197                                                               int                 page);
 198 static void       draw_one_page                              (EvView             *view,
 199                                                               gint                page,
 200                                                               cairo_t            *cr,
 201                                                               GdkRectangle       *page_area,
 202                                                               GtkBorder          *border,
 203                                                               GdkRectangle       *expose_area,
 204                                                               gboolean           *page_ready);
 205 static void       draw_loading_text                          (EvView             *view,
 206                                                               GdkRectangle       *page_area,
 207                                                               GdkRectangle       *expose_area);
 208 static void       ev_view_reload_page                        (EvView             *view,
 209                                                               gint                page,
 210                                                               GdkRegion          *region);
 211
 212 /*** Callbacks ***/
 213 static void       ev_view_change_page                        (EvView             *view,
 214                                                               gint                new_page,
 215                                                               gboolean            start_transition);
 216 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 217                                                               GdkRegion          *region,
 218                                                               EvView             *view);
 219 static void       ev_view_page_changed_cb                    (EvDocumentModel    *model,
 220                                                               gint                old_page,
 221                                                               gint                new_page,
 222                                                               EvView             *view);
 223 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 224                                                               EvView             *view);
 225
 226 /*** GObject ***/
 227 static void       ev_view_finalize                           (GObject            *object);
 228 static void       ev_view_destroy                            (GtkObject          *object);
 229 static void       ev_view_set_property                       (GObject            *object,
 230                                                               guint               prop_id,
 231                                                               const GValue       *value,
 232                                                               GParamSpec         *pspec);
 233 static void       ev_view_get_property                       (GObject            *object,
 234                                                               guint               prop_id,
 235                                                               GValue             *value,
 236                                                               GParamSpec         *pspec);
 237 static void       ev_view_class_init                         (EvViewClass        *class);
 238 static void       ev_view_init                               (EvView             *view);
 239
 240 /*** Zoom and sizing ***/
 241 static double   zoom_for_size_fit_width                      (gdouble doc_width,
 242                                                               gdouble doc_height,
 243                                                               int     target_width,
 244                                                               int     target_height);
 245 static double   zoom_for_size_fit_height                     (gdouble doc_width,
 246                                                               gdouble doc_height,
 247                                                               int     target_width,
 248                                                               int     target_height);
 249 static double   zoom_for_size_best_fit                       (gdouble doc_width,
 250                                                               gdouble doc_height,
 251                                                               int     target_width,
 252                                                               int     target_height);
 253 static void     ev_view_zoom_for_size                        (EvView *view,
 254                                                               int     width,
 255                                                               int     height);
 256 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 257                                                               int     width,
 258                                                               int     height);
 259 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 260                                                                 int     width,
 261                                                                 int     height);
 262 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 263                                                                 int     width,
 264                                                                 int     height);
 265 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 266                                                                 int     width,
 267                                                                 int     height);
 268 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 269                                                                 int     width,
 270                                                                 int     height);
 271 /*** Cursors ***/
 272 static GdkCursor* ev_view_create_invisible_cursor            (void);
 273 static void       ev_view_set_cursor                         (EvView             *view,
 274                                                               EvViewCursor        new_cursor);
 275 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 276                                                               gint x,
 277                                                               gint y);
 278
 279 /*** Find ***/
 280 static gint         ev_view_find_get_n_results               (EvView             *view,
 281                                                               gint                page);
 282 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 283                                                               gint                page,
 284                                                               gint                result);
 285 static void       jump_to_find_result                        (EvView             *view);
 286 static void       jump_to_find_page                          (EvView             *view,
 287                                                               EvViewFindDirection direction,
 288                                                               gint                shift);
 289
 290 /*** Selection ***/
 291 static void       compute_selections                         (EvView             *view,
 292                                                               EvSelectionStyle    style,
 293                                                               GdkPoint           *start,
 294                                                               GdkPoint           *stop);
 295 static void       clear_selection                            (EvView             *view);
 296 static void       clear_link_selected                        (EvView             *view);
 297 static void       selection_free                             (EvViewSelection    *selection);
 298 static char*      get_selected_text                          (EvView             *ev_view);
 299 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 300                                                               GtkSelectionData   *selection_data,
 301                                                               guint               info,
 302                                                               gpointer            data);
 303 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 304                                                               gpointer            data);
 305 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 306
 307 /*** Presentation ***/
 308 static void       ev_view_presentation_transition_start      (EvView             *ev_view);
 309 static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
 310
 311
 312 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 313
 314 /* HeightToPage cache */
 315 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 316
 317 static void
 318 build_height_to_page (EvHeightToPageCache *cache,
 319                       EvDocument          *document,
 320                       gint                 rotation)
 321 {
 322         gboolean swap, uniform, dual_even_left;
 323         int i;
 324         double uniform_height, page_height, next_page_height;
 325         double saved_height;
 326         gdouble u_width, u_height;
 327         gint n_pages;
 328
 329         swap = (rotation == 90 || rotation == 270);
 330
 331         uniform = ev_document_is_page_size_uniform (document);
 332         n_pages = ev_document_get_n_pages (document);
 333         dual_even_left = (n_pages > 2);
 334
 335         g_free (cache->height_to_page);
 336         g_free (cache->dual_height_to_page);
 337
 338         cache->rotation = rotation;
 339         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 340         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 341
 342         if (uniform)
 343                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 344
 345         saved_height = 0;
 346         for (i = 0; i <= n_pages; i++) {
 347                 if (uniform) {
 348                         uniform_height = swap ? u_width : u_height;
 349                         cache->height_to_page[i] = i * uniform_height;
 350                 } else {
 351                         if (i < n_pages) {
 352                                 gdouble w, h;
 353
 354                                 ev_document_get_page_size (document, i, &w, &h);
 355                                 page_height = swap ? w : h;
 356                         } else {
 357                                 page_height = 0;
 358                         }
 359                         cache->height_to_page[i] = saved_height;
 360                         saved_height += page_height;
 361                 }
 362         }
 363
 364         if (dual_even_left && !uniform) {
 365                 gdouble w, h;
 366
 367                 ev_document_get_page_size (document, 0, &w, &h);
 368                 saved_height = swap ? w : h;
 369         } else {
 370                 saved_height = 0;
 371         }
 372
 373         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 374                 if (uniform) {
 375                         uniform_height = swap ? u_width : u_height;
 376                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 377                         if (i + 1 < n_pages + 2)
 378                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 379                 } else {
 380                         if (i + 1 < n_pages) {
 381                                 gdouble w, h;
 382
 383                                 ev_document_get_page_size (document, i + 1, &w, &h);
 384                                 next_page_height = swap ? w : h;
 385                         } else {
 386                                 next_page_height = 0;
 387                         }
 388
 389                         if (i < n_pages) {
 390                                 gdouble w, h;
 391
 392                                 ev_document_get_page_size (document, i, &w, &h);
 393                                 page_height = swap ? w : h;
 394                         } else {
 395                                 page_height = 0;
 396                         }
 397
 398                         if (i + 1 < n_pages + 2) {
 399                                 cache->dual_height_to_page[i] = saved_height;
 400                                 cache->dual_height_to_page[i + 1] = saved_height;
 401                                 saved_height += MAX(page_height, next_page_height);
 402                         } else {
 403                                 cache->dual_height_to_page[i] = saved_height;
 404                         }
 405                 }
 406         }
 407 }
 408
 409 static void
 410 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 411                                     EvDocument          *document,
 412                                     gint                 page,
 413                                     gint                 rotation,
 414                                     gdouble             *height,
 415                                     gdouble             *dual_height)
 416 {
 417         if (cache->rotation != rotation)
 418                 build_height_to_page (cache, document, rotation);
 419
 420         *height = cache->height_to_page[page];
 421         *dual_height = cache->dual_height_to_page[page];
 422 }
 423
 424 static void
 425 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 426 {
 427         if (cache->height_to_page) {
 428                 g_free (cache->height_to_page);
 429                 cache->height_to_page = NULL;
 430         }
 431
 432         if (cache->dual_height_to_page) {
 433                 g_free (cache->dual_height_to_page);
 434                 cache->dual_height_to_page = NULL;
 435         }
 436         g_free (cache);
 437 }
 438
 439 static EvHeightToPageCache *
 440 ev_view_get_height_to_page_cache (EvView *view)
 441 {
 442         EvHeightToPageCache *cache;
 443
 444         if (!view->document)
 445                 return NULL;
 446
 447         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 448         if (!cache) {
 449                 cache = g_new0 (EvHeightToPageCache, 1);
 450                 build_height_to_page (cache, view->document, view->rotation);
 451                 g_object_set_data_full (G_OBJECT (view->document),
 452                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 453                                         cache,
 454                                         (GDestroyNotify)ev_height_to_page_cache_free);
 455         }
 456
 457         return cache;
 458 }
 459
 460 static void
 461 ev_view_get_height_to_page (EvView *view,
 462                             gint    page,
 463                             gint   *height,
 464                             gint   *dual_height)
 465 {
 466         gdouble h, dh;
 467
 468         if (!view->height_to_page_cache)
 469                 return;
 470
 471         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 472                                             view->document,
 473                                             page,
 474                                             view->rotation,
 475                                             &h, &dh);
 476         if (height)
 477                 *height = (gint)(h * view->scale + 0.5);
 478
 479         if (dual_height)
 480                 *dual_height = (gint)(dh * view->scale + 0.5);
 481 }
 482
 483 static gint
 484 ev_view_get_scrollbar_size (EvView        *view,
 485                             GtkOrientation orientation)
 486 {
 487         GtkWidget *widget = GTK_WIDGET (view);
 488         GtkWidget *sb;
 489         GtkWidget *swindow = gtk_widget_get_parent (GTK_WIDGET (view));
 490         GtkRequisition req;
 491         gint spacing;
 492
 493         if (!GTK_IS_SCROLLED_WINDOW (swindow))
 494                 return 0;
 495
 496         if (orientation == GTK_ORIENTATION_VERTICAL) {
 497                 if (widget->allocation.height >= widget->requisition.height)
 498                         sb = gtk_scrolled_window_get_vscrollbar (GTK_SCROLLED_WINDOW (swindow));
 499                 else
 500                         return 0;
 501         } else {
 502                 if (widget->allocation.width >= widget->requisition.width)
 503                         sb = gtk_scrolled_window_get_hscrollbar (GTK_SCROLLED_WINDOW (swindow));
 504                 else
 505                         return 0;
 506         }
 507
 508         gtk_widget_style_get (swindow, "scrollbar_spacing", &spacing, NULL);
 509         gtk_widget_size_request (sb, &req);
 510
 511         return (orientation == GTK_ORIENTATION_VERTICAL ? req.width : req.height) + spacing;
 512 }
 513
 514 static void
 515 scroll_to_point (EvView        *view,
 516                  gdouble        x,
 517                  gdouble        y,
 518                  GtkOrientation orientation)
 519 {
 520         if (orientation == GTK_ORIENTATION_VERTICAL) {
 521                 if (view->continuous) {
 522                         gtk_adjustment_clamp_page (view->vadjustment,
 523                                                    y - view->spacing / 2,
 524                                                    y + view->vadjustment->page_size);
 525                 } else {
 526                         gtk_adjustment_set_value (view->vadjustment,
 527                                                   CLAMP (y,
 528                                                   view->vadjustment->lower,
 529                                                   view->vadjustment->upper -
 530                                                   view->vadjustment->page_size));
 531                 }
 532         } else {
 533                 if (view->dual_page) {
 534                         gtk_adjustment_clamp_page (view->hadjustment, x,
 535                                                    x + view->hadjustment->page_size);
 536                 } else {
 537                         gtk_adjustment_set_value (view->hadjustment,
 538                                                   CLAMP (x,
 539                                                   view->hadjustment->lower,
 540                                                   view->hadjustment->upper -
 541                                                   view->hadjustment->page_size));
 542                 }
 543         }
 544 }
 545
 546 static void
 547 ev_view_scroll_to_page_position (EvView *view, GtkOrientation orientation)
 548 {
 549         gdouble x, y;
 550
 551         if (!view->document)
 552                 return;
 553
 554         if ((orientation == GTK_ORIENTATION_VERTICAL && view->pending_point.y == 0) ||
 555             (orientation == GTK_ORIENTATION_HORIZONTAL && view->pending_point.x == 0)) {
 556                 GdkRectangle page_area;
 557                 GtkBorder    border;
 558
 559                 get_page_extents (view, view->current_page, &page_area, &border);
 560                 x = page_area.x;
 561                 y = page_area.y;
 562         } else {
 563                 GdkPoint view_point;
 564
 565                 doc_point_to_view_point (view, view->current_page,
 566                                          &view->pending_point, &view_point);
 567                 x = view_point.x;
 568                 y = view_point.y;
 569         }
 570
 571         scroll_to_point (view, x, y, orientation);
 572 }
 573
 574 static void
 575 view_set_adjustment_values (EvView         *view,
 576                             GtkOrientation  orientation)
 577 {
 578         GtkWidget *widget = GTK_WIDGET (view);
 579         GtkAdjustment *adjustment;
 580         int requisition;
 581         int allocation;
 582
 583         double factor;
 584         gint new_value;
 585
 586         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 587                 requisition = widget->requisition.width;
 588                 allocation = widget->allocation.width;
 589                 adjustment = view->hadjustment;
 590         } else {
 591                 requisition = widget->requisition.height;
 592                 allocation = widget->allocation.height;
 593                 adjustment = view->vadjustment;
 594         }
 595
 596         if (!adjustment)
 597                 return;
 598
 599         factor = 1.0;
 600         switch (view->pending_scroll) {
 601                 case SCROLL_TO_KEEP_POSITION:
 602                 case SCROLL_TO_FIND_LOCATION:
 603                         factor = (adjustment->value) / adjustment->upper;
 604                         break;
 605                 case SCROLL_TO_PAGE_POSITION:
 606                         break;
 607                 case SCROLL_TO_CENTER:
 608                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 609                         break;
 610         }
 611
 612         adjustment->page_size = allocation;
 613         adjustment->step_increment = allocation * 0.1;
 614         adjustment->page_increment = allocation * 0.9;
 615         adjustment->lower = 0;
 616         adjustment->upper = MAX (allocation, requisition);
 617
 618         /*
 619          * We add 0.5 to the values before to average out our rounding errors.
 620          */
 621         switch (view->pending_scroll) {
 622                 case SCROLL_TO_KEEP_POSITION:
 623                 case SCROLL_TO_FIND_LOCATION:
 624                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 625                         gtk_adjustment_set_value (adjustment, (int)new_value);
 626                         break;
 627                 case SCROLL_TO_PAGE_POSITION:
 628                         ev_view_scroll_to_page_position (view, orientation);
 629                         break;
 630                 case SCROLL_TO_CENTER:
 631                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 632                                            0, adjustment->upper - adjustment->page_size);
 633                         gtk_adjustment_set_value (adjustment, (int)new_value);
 634                         break;
 635         }
 636
 637         gtk_adjustment_changed (adjustment);
 638 }
 639
 640 static void
 641 view_update_range_and_current_page (EvView *view)
 642 {
 643         gint start = view->start_page;
 644         gint end = view->end_page;
 645
 646         /* Presentation trumps all other modes */
 647         if (view->presentation) {
 648                 view->start_page = view->current_page;
 649                 view->end_page = view->current_page;
 650         } else if (view->continuous) {
 651                 GdkRectangle current_area, unused, page_area;
 652                 GtkBorder border;
 653                 gboolean found = FALSE;
 654                 gint area_max = -1, area;
 655                 gint best_current_page = -1;
 656                 int i, j = 0;
 657
 658                 if (!(view->vadjustment && view->hadjustment))
 659                         return;
 660
 661                 current_area.x = view->hadjustment->value;
 662                 current_area.width = view->hadjustment->page_size;
 663                 current_area.y = view->vadjustment->value;
 664                 current_area.height = view->vadjustment->page_size;
 665
 666                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 667
 668                         get_page_extents (view, i, &page_area, &border);
 669
 670                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 671                                 area = unused.width * unused.height;
 672
 673                                 if (!found) {
 674                                         area_max = area;
 675                                         view->start_page = i;
 676                                         found = TRUE;
 677                                         best_current_page = i;
 678                                 }
 679                                 if (area > area_max) {
 680                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 681                                         area_max = area;
 682                                 }
 683
 684                                 view->end_page = i;
 685                                 j = 0;
 686                         } else if (found && view->current_page <= view->end_page) {
 687                                 if (view->dual_page && j < 1) {
 688                                         /* In dual mode  we stop searching
 689                                          * after two consecutive non-visible pages.
 690                                          */
 691                                         j++;
 692                                         continue;
 693                                 }
 694                                 break;
 695                         }
 696                 }
 697
 698                 if (view->pending_scroll == SCROLL_TO_KEEP_POSITION) {
 699                         best_current_page = MAX (best_current_page, view->start_page);
 700
 701                         if (view->current_page != best_current_page) {
 702                                 view->current_page = best_current_page;
 703                                 ev_document_model_set_page (view->model, best_current_page);
 704                         }
 705                 }
 706         } else if (view->dual_page) {
 707                 if (view->current_page % 2 == get_dual_even_left (view)) {
 708                         view->start_page = view->current_page;
 709                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 710                                 view->end_page = view->start_page + 1;
 711                         else
 712                                 view->end_page = view->start_page;
 713                 } else {
 714                         if (view->current_page < 1)
 715                                 view->start_page = view->current_page;
 716                         else
 717                                 view->start_page = view->current_page - 1;
 718                         view->end_page = view->current_page;
 719                 }
 720         } else {
 721                 view->start_page = view->current_page;
 722                 view->end_page = view->current_page;
 723         }
 724
 725         if (start != view->start_page || end != view->end_page) {
 726                 gint i;
 727
 728                 for (i = start; i < view->start_page; i++) {
 729                         hide_annotation_windows (view, i);
 730                 }
 731
 732                 for (i = end; i > view->end_page; i--) {
 733                         hide_annotation_windows (view, i);
 734                 }
 735         }
 736
 737         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 738                                         view->start_page,
 739                                         view->end_page,
 740                                         view->rotation,
 741                                         view->scale,
 742                                         view->selection_info.selections);
 743
 744         if (ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page))
 745             gtk_widget_queue_draw (GTK_WIDGET (view));
 746 }
 747
 748 static void
 749 set_scroll_adjustment (EvView *view,
 750                        GtkOrientation  orientation,
 751                        GtkAdjustment  *adjustment)
 752 {
 753         GtkAdjustment **to_set;
 754
 755         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 756                 to_set = &view->hadjustment;
 757         else
 758                 to_set = &view->vadjustment;
 759
 760         if (*to_set != adjustment) {
 761                 if (*to_set) {
 762                         g_signal_handlers_disconnect_by_func (*to_set,
 763                                                               (gpointer) on_adjustment_value_changed,
 764                                                               view);
 765                         g_object_unref (*to_set);
 766                 }
 767
 768                 *to_set = adjustment;
 769                 view_set_adjustment_values (view, orientation);
 770
 771                 if (*to_set) {
 772                         g_object_ref (*to_set);
 773                         g_signal_connect (*to_set, "value_changed",
 774                                           G_CALLBACK (on_adjustment_value_changed), view);
 775                 }
 776         }
 777 }
 778
 779 static void
 780 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 781                                 GtkAdjustment  *hadjustment,
 782                                 GtkAdjustment  *vadjustment)
 783 {
 784         EvView *view = EV_VIEW (layout);
 785
 786         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 787         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 788
 789         on_adjustment_value_changed (NULL, view);
 790 }
 791
 792 static void
 793 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 794                            guint           keyval,
 795                            GdkModifierType modifiers,
 796                            GtkScrollType   scroll,
 797                            gboolean        horizontal)
 798 {
 799   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 800
 801   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 802                                 "binding_activated", 2,
 803                                 GTK_TYPE_SCROLL_TYPE, scroll,
 804                                 G_TYPE_BOOLEAN, horizontal);
 805   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 806                                 "binding_activated", 2,
 807                                 GTK_TYPE_SCROLL_TYPE, scroll,
 808                                 G_TYPE_BOOLEAN, horizontal);
 809 }
 810
 811 static gdouble
 812 compute_scroll_increment (EvView        *view,
 813                           GtkScrollType  scroll)
 814 {
 815         GtkWidget *widget = GTK_WIDGET (view);
 816         GtkAdjustment *adjustment = view->vadjustment;
 817         GdkRegion *text_region, *region;
 818         gint page;
 819         GdkRectangle rect;
 820         EvRectangle doc_rect;
 821         GdkRectangle page_area;
 822         GtkBorder border;
 823         GdkRectangle *recs;
 824         gint n_recs;
 825         gdouble fraction = 1.0;
 826
 827         if (scroll != GTK_SCROLL_PAGE_BACKWARD && scroll != GTK_SCROLL_PAGE_FORWARD)
 828                 return adjustment->page_size;
 829
 830         page = scroll == GTK_SCROLL_PAGE_BACKWARD ? view->start_page : view->end_page;
 831
 832         text_region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
 833         if (!text_region || gdk_region_empty (text_region))
 834                 return adjustment->page_size;
 835
 836         get_page_extents (view, page, &page_area, &border);
 837         rect.x = page_area.x + view->scroll_x;
 838         rect.y = view->scroll_y + (scroll == GTK_SCROLL_PAGE_BACKWARD ? 5 : widget->allocation.height - 5);
 839         rect.width = page_area.width;
 840         rect.height = 1;
 841         view_rect_to_doc_rect (view, &rect, &page_area, &doc_rect);
 842
 843         /* Convert the doc rectangle into a GdkRectangle */
 844         rect.x = doc_rect.x1;
 845         rect.y = doc_rect.y1;
 846         rect.width = doc_rect.x2 - doc_rect.x1;
 847         rect.height = MAX (1, doc_rect.y2 - doc_rect.y1);
 848         region = gdk_region_rectangle (&rect);
 849
 850         gdk_region_intersect (region, text_region);
 851         gdk_region_get_rectangles (region, &recs, &n_recs);
 852         gdk_region_destroy (region);
 853         if (n_recs > 0) {
 854                 EvRenderContext *rc;
 855                 EvPage  *ev_page;
 856
 857                 ev_page = ev_document_get_page (view->document, page);
 858                 rc = ev_render_context_new (ev_page, view->rotation, view->scale);
 859                 g_object_unref (ev_page);
 860                 /* Get the selection region to know the height of the line */
 861                 doc_rect.x1 = doc_rect.x2 = recs[0].x + 0.5;
 862                 doc_rect.y1 = doc_rect.y2 = recs[0].y + 0.5;
 863
 864                 ev_document_doc_mutex_lock ();
 865                 region = ev_selection_get_selection_region (EV_SELECTION (view->document),
 866                                                             rc, EV_SELECTION_STYLE_LINE,
 867                                                             &doc_rect);
 868                 ev_document_doc_mutex_unlock ();
 869
 870                 g_object_unref (rc);
 871                 g_free (recs);
 872                 gdk_region_get_rectangles (region, &recs, &n_recs);
 873                 gdk_region_destroy (region);
 874                 if (n_recs > 0) {
 875                         fraction = 1 - (recs[0].height / adjustment->page_size);
 876                 }
 877                 g_free (recs);
 878         }
 879
 880         return adjustment->page_size * fraction;
 881
 882 }
 883
 884 void
 885 ev_view_scroll (EvView        *view,
 886                 GtkScrollType  scroll,
 887                 gboolean       horizontal)
 888 {
 889         GtkAdjustment *adjustment;
 890         double value, increment;
 891         gboolean first_page = FALSE;
 892         gboolean last_page = FALSE;
 893
 894         view->jump_to_find_result = FALSE;
 895
 896         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 897                 switch (scroll) {
 898                         case GTK_SCROLL_PAGE_BACKWARD:
 899                         case GTK_SCROLL_STEP_BACKWARD:
 900                                 ev_view_previous_page (view);
 901                                 break;
 902                         case GTK_SCROLL_PAGE_FORWARD:
 903                         case GTK_SCROLL_STEP_FORWARD:
 904                                 ev_view_next_page (view);
 905                                 break;
 906                         default:
 907                                 break;
 908                 }
 909                 return;
 910         }
 911
 912         /* Assign values for increment and vertical adjustment */
 913         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 914         value = adjustment->value;
 915
 916         /* Assign boolean for first and last page */
 917         if (view->current_page == 0)
 918                 first_page = TRUE;
 919         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 920                 last_page = TRUE;
 921
 922         switch (scroll) {
 923                 case GTK_SCROLL_PAGE_BACKWARD:
 924                         /* Do not jump backwards if at the first page */
 925                         if (value == (adjustment->lower) && first_page) {
 926                                 /* Do nothing */
 927                                 /* At the top of a page, assign the upper bound limit of previous page */
 928                         } else if (value == (adjustment->lower)) {
 929                                 value = adjustment->upper - adjustment->page_size;
 930                                 ev_view_previous_page (view);
 931                                 /* Jump to the top */
 932                         } else {
 933                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_BACKWARD);
 934                                 value = MAX (value - increment, adjustment->lower);
 935                         }
 936                         break;
 937                 case GTK_SCROLL_PAGE_FORWARD:
 938                         /* Do not jump forward if at the last page */
 939                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 940                                 /* Do nothing */
 941                         /* At the bottom of a page, assign the lower bound limit of next page */
 942                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 943                                 value = 0;
 944                                 ev_view_next_page (view);
 945                         /* Jump to the bottom */
 946                         } else {
 947                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_FORWARD);
 948                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 949                         }
 950                         break;
 951                 case GTK_SCROLL_STEP_BACKWARD:
 952                         value -= adjustment->step_increment;
 953                         break;
 954                 case GTK_SCROLL_STEP_FORWARD:
 955                         value += adjustment->step_increment;
 956                         break;
 957                 case GTK_SCROLL_STEP_DOWN:
 958                         value -= adjustment->step_increment / 10;
 959                         break;
 960                 case GTK_SCROLL_STEP_UP:
 961                         value += adjustment->step_increment / 10;
 962                         break;
 963                 default:
 964                         break;
 965         }
 966
 967         value = CLAMP (value, adjustment->lower,
 968                        adjustment->upper - adjustment->page_size);
 969
 970         gtk_adjustment_set_value (adjustment, value);
 971 }
 972
 973 #define MARGIN 5
 974
 975 static void
 976 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 977 {
 978         GtkWidget *widget = GTK_WIDGET (view);
 979         GtkAdjustment *adjustment;
 980         int value;
 981
 982         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 983
 984         adjustment = view->vadjustment;
 985
 986         if (rect->y < adjustment->value) {
 987                 value = MAX (adjustment->lower, rect->y - MARGIN);
 988                 gtk_adjustment_set_value (view->vadjustment, value);
 989         } else if (rect->y + rect->height >
 990                    adjustment->value + widget->allocation.height) {
 991                 value = MIN (adjustment->upper, rect->y + rect->height -
 992                              widget->allocation.height + MARGIN);
 993                 gtk_adjustment_set_value (view->vadjustment, value);
 994         }
 995
 996         adjustment = view->hadjustment;
 997
 998         if (rect->x < adjustment->value) {
 999                 value = MAX (adjustment->lower, rect->x - MARGIN);
1000                 gtk_adjustment_set_value (view->hadjustment, value);
1001         } else if (rect->x + rect->height >
1002                    adjustment->value + widget->allocation.width) {
1003                 value = MIN (adjustment->upper, rect->x + rect->width -
1004                              widget->allocation.width + MARGIN);
1005                 gtk_adjustment_set_value (view->hadjustment, value);
1006         }
1007
1008         gtk_widget_queue_resize (GTK_WIDGET (view));
1009 }
1010
1011 /*** Geometry computations ***/
1012
1013 static void
1014 compute_border (EvView *view, int width, int height, GtkBorder *border)
1015 {
1016         if (view->presentation) {
1017                 border->left = 0;
1018                 border->right = 0;
1019                 border->top = 0;
1020                 border->bottom = 0;
1021         } else {
1022                 ev_document_misc_get_page_border_size (width, height, border);
1023         }
1024 }
1025
1026 void
1027 _get_page_size_for_scale_and_rotation (EvDocument *document,
1028                                        gint        page,
1029                                        gdouble     scale,
1030                                        gint        rotation,
1031                                        gint       *page_width,
1032                                        gint       *page_height)
1033 {
1034         gdouble w, h;
1035         gint    width, height;
1036
1037         ev_document_get_page_size (document, page, &w, &h);
1038
1039         width = (gint)(w * scale + 0.5);
1040         height = (gint)(h * scale + 0.5);
1041
1042         if (page_width)
1043                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
1044         if (page_height)
1045                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
1046 }
1047
1048 static void
1049 ev_view_get_page_size (EvView *view,
1050                        gint    page,
1051                        gint   *page_width,
1052                        gint   *page_height)
1053 {
1054         _get_page_size_for_scale_and_rotation (view->document,
1055                                                page,
1056                                                view->scale,
1057                                                view->rotation,
1058                                                page_width,
1059                                                page_height);
1060 }
1061
1062 static void
1063 ev_view_get_max_page_size (EvView *view,
1064                            gint   *max_width,
1065                            gint   *max_height)
1066 {
1067         double w, h;
1068         gint   width, height;
1069
1070         ev_document_get_max_page_size (view->document, &w, &h);
1071
1072         width = (gint)(w * view->scale + 0.5);
1073         height = (gint)(h * view->scale + 0.5);
1074
1075         if (max_width)
1076                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
1077         if (max_height)
1078                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
1079 }
1080
1081 static void
1082 get_page_y_offset (EvView *view, int page, int *y_offset)
1083 {
1084         int max_width, offset;
1085         GtkBorder border;
1086
1087         g_return_if_fail (y_offset != NULL);
1088
1089         ev_view_get_max_page_size (view, &max_width, NULL);
1090         compute_border (view, max_width, max_width, &border);
1091
1092         if (view->dual_page) {
1093                 ev_view_get_height_to_page (view, page, NULL, &offset);
1094                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
1095                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
1096         } else {
1097                 ev_view_get_height_to_page (view, page, &offset, NULL);
1098                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
1099         }
1100
1101         *y_offset = offset;
1102         return;
1103 }
1104
1105 static gboolean
1106 get_page_extents (EvView       *view,
1107                   gint          page,
1108                   GdkRectangle *page_area,
1109                   GtkBorder    *border)
1110 {
1111         GtkWidget *widget;
1112         int width, height;
1113
1114         widget = GTK_WIDGET (view);
1115
1116         /* Get the size of the page */
1117         ev_view_get_page_size (view, page, &width, &height);
1118         compute_border (view, width, height, border);
1119         page_area->width = width + border->left + border->right;
1120         page_area->height = height + border->top + border->bottom;
1121
1122         if (view->presentation) {
1123                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
1124                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
1125         } else if (view->continuous) {
1126                 gint max_width;
1127                 gint x, y;
1128
1129                 ev_view_get_max_page_size (view, &max_width, NULL);
1130                 max_width = max_width + border->left + border->right;
1131                 /* Get the location of the bounding box */
1132                 if (view->dual_page) {
1133                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1134                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1135                         if (page % 2 == get_dual_even_left (view))
1136                                 x = x + (max_width - width - border->left - border->right);
1137                 } else {
1138                         x = view->spacing;
1139                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
1140                 }
1141
1142                 get_page_y_offset (view, page, &y);
1143
1144                 page_area->x = x;
1145                 page_area->y = y;
1146         } else {
1147                 gint x, y;
1148                 if (view->dual_page) {
1149                         gint width_2, height_2;
1150                         gint max_width = width;
1151                         gint max_height = height;
1152                         GtkBorder overall_border;
1153                         gint other_page;
1154
1155                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1156
1157                         /* First, we get the bounding box of the two pages */
1158                         if (other_page < ev_document_get_n_pages (view->document)
1159                             && (0 <= other_page)) {
1160                                 ev_view_get_page_size (view, other_page,
1161                                                        &width_2, &height_2);
1162                                 if (width_2 > width)
1163                                         max_width = width_2;
1164                                 if (height_2 > height)
1165                                         max_height = height_2;
1166                         }
1167                         compute_border (view, max_width, max_height, &overall_border);
1168
1169                         /* Find the offsets */
1170                         x = view->spacing;
1171                         y = view->spacing;
1172
1173                         /* Adjust for being the left or right page */
1174                         if (page % 2 == get_dual_even_left (view))
1175                                 x = x + max_width - width;
1176                         else
1177                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1178
1179                         y = y + (max_height - height)/2;
1180
1181                         /* Adjust for extra allocation */
1182                         x = x + MAX (0, widget->allocation.width -
1183                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1184                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
1185                 } else {
1186                         x = view->spacing;
1187                         y = view->spacing;
1188
1189                         /* Adjust for extra allocation */
1190                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1191                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1192                 }
1193
1194                 page_area->x = x;
1195                 page_area->y = y;
1196         }
1197
1198         return TRUE;
1199 }
1200
1201 static void
1202 get_doc_page_size (EvView  *view,
1203                    gint     page,
1204                    gdouble *width,
1205                    gdouble *height)
1206 {
1207         double w, h;
1208
1209         ev_document_get_page_size (view->document, page, &w, &h);
1210         if (view->rotation == 0 || view->rotation == 180) {
1211                 if (width) *width = w;
1212                 if (height) *height = h;
1213         } else {
1214                 if (width) *width = h;
1215                 if (height) *height = w;
1216         }
1217 }
1218
1219 static void
1220 view_point_to_doc_point (EvView *view,
1221                          GdkPoint *view_point,
1222                          GdkRectangle *page_area,
1223                          double  *doc_point_x,
1224                          double  *doc_point_y)
1225 {
1226         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1227         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1228 }
1229
1230 static void
1231 view_rect_to_doc_rect (EvView *view,
1232                        GdkRectangle *view_rect,
1233                        GdkRectangle *page_area,
1234                        EvRectangle  *doc_rect)
1235 {
1236         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1237         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1238         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1239         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1240 }
1241
1242 static void
1243 doc_point_to_view_point (EvView       *view,
1244                          int           page,
1245                          EvPoint      *doc_point,
1246                          GdkPoint     *view_point)
1247 {
1248         GdkRectangle page_area;
1249         GtkBorder border;
1250         double x, y, view_x, view_y;
1251         gdouble width, height;
1252
1253         get_doc_page_size (view, page, &width, &height);
1254
1255         if (view->rotation == 0) {
1256                 x = doc_point->x;
1257                 y = doc_point->y;
1258         } else if (view->rotation == 90) {
1259                 x = width - doc_point->y;
1260                 y = doc_point->x;
1261         } else if (view->rotation == 180) {
1262                 x = width - doc_point->x;
1263                 y = height - doc_point->y;
1264         } else if (view->rotation == 270) {
1265                 x = doc_point->y;
1266                 y = height - doc_point->x;
1267         } else {
1268                 g_assert_not_reached ();
1269         }
1270
1271         get_page_extents (view, page, &page_area, &border);
1272
1273         view_x = CLAMP (x * view->scale, 0, page_area.width);
1274         view_y = CLAMP (y * view->scale, 0, page_area.height);
1275         view_point->x = view_x + page_area.x;
1276         view_point->y = view_y + page_area.y;
1277 }
1278
1279 static void
1280 doc_rect_to_view_rect (EvView       *view,
1281                        int           page,
1282                        EvRectangle  *doc_rect,
1283                        GdkRectangle *view_rect)
1284 {
1285         GdkRectangle page_area;
1286         GtkBorder border;
1287         double x, y, w, h;
1288         gdouble width, height;
1289
1290         get_doc_page_size (view, page, &width, &height);
1291
1292         if (view->rotation == 0) {
1293                 x = doc_rect->x1;
1294                 y = doc_rect->y1;
1295                 w = doc_rect->x2 - doc_rect->x1;
1296                 h = doc_rect->y2 - doc_rect->y1;
1297         } else if (view->rotation == 90) {
1298                 x = width - doc_rect->y2;
1299                 y = doc_rect->x1;
1300                 w = doc_rect->y2 - doc_rect->y1;
1301                 h = doc_rect->x2 - doc_rect->x1;
1302         } else if (view->rotation == 180) {
1303                 x = width - doc_rect->x2;
1304                 y = height - doc_rect->y2;
1305                 w = doc_rect->x2 - doc_rect->x1;
1306                 h = doc_rect->y2 - doc_rect->y1;
1307         } else if (view->rotation == 270) {
1308                 x = doc_rect->y1;
1309                 y = height - doc_rect->x2;
1310                 w = doc_rect->y2 - doc_rect->y1;
1311                 h = doc_rect->x2 - doc_rect->x1;
1312         } else {
1313                 g_assert_not_reached ();
1314         }
1315
1316         get_page_extents (view, page, &page_area, &border);
1317
1318         view_rect->x = x * view->scale + page_area.x;
1319         view_rect->y = y * view->scale + page_area.y;
1320         view_rect->width = w * view->scale;
1321         view_rect->height = h * view->scale;
1322 }
1323
1324 static gboolean
1325 get_dual_even_left (EvView *view)
1326 {
1327         return (ev_document_get_n_pages (view->document) > 2);
1328 }
1329
1330 static void
1331 find_page_at_location (EvView  *view,
1332                        gdouble  x,
1333                        gdouble  y,
1334                        gint    *page,
1335                        gint    *x_offset,
1336                        gint    *y_offset)
1337 {
1338         int i;
1339
1340         if (view->document == NULL)
1341                 return;
1342
1343         g_assert (page);
1344         g_assert (x_offset);
1345         g_assert (y_offset);
1346
1347         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1348                 GdkRectangle page_area;
1349                 GtkBorder border;
1350
1351                 if (! get_page_extents (view, i, &page_area, &border))
1352                         continue;
1353
1354                 if ((x >= page_area.x + border.left) &&
1355                     (x < page_area.x + page_area.width - border.right) &&
1356                     (y >= page_area.y + border.top) &&
1357                     (y < page_area.y + page_area.height - border.bottom)) {
1358                         *page = i;
1359                         *x_offset = x - (page_area.x + border.left);
1360                         *y_offset = y - (page_area.y + border.top);
1361                         return;
1362                 }
1363         }
1364
1365         *page = -1;
1366 }
1367
1368 static gboolean
1369 location_in_text (EvView  *view,
1370                   gdouble  x,
1371                   gdouble  y)
1372 {
1373         GdkRegion *region;
1374         gint page = -1;
1375         gint x_offset = 0, y_offset = 0;
1376
1377         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1378
1379         if (page == -1)
1380                 return FALSE;
1381
1382         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1383
1384         if (region)
1385                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1386         else
1387                 return FALSE;
1388 }
1389
1390 static int
1391 ev_view_get_width (EvView *view)
1392 {
1393         return GTK_WIDGET (view)->allocation.width;
1394 }
1395
1396 static int
1397 ev_view_get_height (EvView *view)
1398 {
1399         return GTK_WIDGET (view)->allocation.height;
1400 }
1401
1402 static gboolean
1403 location_in_selected_text (EvView  *view,
1404                            gdouble  x,
1405                            gdouble  y)
1406 {
1407         gint page = -1;
1408         gint x_offset = 0, y_offset = 0;
1409         EvViewSelection *selection;
1410         GList *l = NULL;
1411
1412         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1413                 selection = (EvViewSelection *)l->data;
1414
1415                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1416
1417                 if (page != selection->page)
1418                         continue;
1419
1420                 if (selection->covered_region &&
1421                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1422                         return TRUE;
1423         }
1424
1425         return FALSE;
1426 }
1427
1428 static gboolean
1429 get_doc_point_from_offset (EvView *view,
1430                            gint    page,
1431                            gint    x_offset,
1432                            gint    y_offset,
1433                            gint   *x_new,
1434                            gint   *y_new)
1435 {
1436         gdouble width, height;
1437         double x, y;
1438
1439         get_doc_page_size (view, page, &width, &height);
1440
1441         x_offset = x_offset / view->scale;
1442         y_offset = y_offset / view->scale;
1443
1444         if (view->rotation == 0) {
1445                 x = x_offset;
1446                 y = y_offset;
1447         } else if (view->rotation == 90) {
1448                 x = y_offset;
1449                 y = width - x_offset;
1450         } else if (view->rotation == 180) {
1451                 x = width - x_offset;
1452                 y = height - y_offset;
1453         } else if (view->rotation == 270) {
1454                 x = height - y_offset;
1455                 y = x_offset;
1456         } else {
1457                 g_assert_not_reached ();
1458         }
1459
1460         *x_new = x;
1461         *y_new = y;
1462
1463         return TRUE;
1464 }
1465
1466 static gboolean
1467 get_doc_point_from_location (EvView  *view,
1468                              gdouble  x,
1469                              gdouble  y,
1470                              gint    *page,
1471                              gint    *x_new,
1472                              gint    *y_new)
1473 {
1474         gint x_offset = 0, y_offset = 0;
1475
1476         x += view->scroll_x;
1477         y += view->scroll_y;
1478         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1479         if (*page == -1)
1480                 return FALSE;
1481
1482         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1483 }
1484
1485 static void
1486 ev_view_get_area_from_mapping (EvView       *view,
1487                                guint         page,
1488                                GList        *mapping_list,
1489                                gconstpointer data,
1490                                GdkRectangle *area)
1491 {
1492         EvMapping *mapping;
1493
1494         mapping = ev_mapping_list_find (mapping_list, data);
1495         doc_rect_to_view_rect (view, page, &mapping->area, area);
1496         area->x -= view->scroll_x;
1497         area->y -= view->scroll_y;
1498 }
1499
1500
1501 /*** Hyperref ***/
1502 static EvLink *
1503 ev_view_get_link_at_location (EvView  *view,
1504                               gdouble  x,
1505                               gdouble  y)
1506 {
1507         gint page = -1;
1508         gint x_new = 0, y_new = 0;
1509         GList *link_mapping;
1510
1511         if (!EV_IS_DOCUMENT_LINKS (view->document))
1512                 return NULL;
1513
1514         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1515                 return NULL;
1516
1517         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1518
1519         if (link_mapping)
1520                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1521         else
1522                 return NULL;
1523 }
1524
1525 static void
1526 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1527 {
1528         EvPoint doc_point;
1529         gdouble zoom, left, top;
1530         gboolean change_left, change_top;
1531
1532         left = ev_link_dest_get_left (dest, &change_left);
1533         top = ev_link_dest_get_top (dest, &change_top);
1534
1535         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1536                                        ev_link_dest_get_bottom (dest) - top,
1537                                        ev_view_get_width (view),
1538                                        ev_view_get_height (view));
1539
1540         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1541         ev_document_model_set_scale (view->model, zoom);
1542
1543         doc_point.x = change_left ? left : 0;
1544         doc_point.y = change_top ? top : 0;
1545         view->pending_point = doc_point;
1546
1547         ev_view_change_page (view, ev_link_dest_get_page (dest), TRUE);
1548 }
1549
1550 static void
1551 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1552 {
1553         EvPoint doc_point;
1554         gdouble doc_width, doc_height;
1555         gint page;
1556         double zoom, left;
1557         gboolean change_left;
1558
1559         page = ev_link_dest_get_page (dest);
1560         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1561
1562         left = ev_link_dest_get_left (dest, &change_left);
1563         doc_point.x = change_left ? left : 0;
1564         doc_point.y = 0;
1565
1566         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1567                                          ev_view_get_width (view),
1568                                          ev_view_get_height (view));
1569
1570         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1571         ev_document_model_set_scale (view->model, zoom);
1572
1573         view->pending_point = doc_point;
1574
1575         ev_view_change_page (view, page, TRUE);
1576 }
1577
1578 static void
1579 goto_fith_dest (EvView *view, EvLinkDest *dest)
1580 {
1581         EvPoint doc_point;
1582         gdouble doc_width, doc_height;
1583         gint page;
1584         gdouble zoom, top;
1585         gboolean change_top;
1586
1587         page = ev_link_dest_get_page (dest);
1588         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1589
1590         top = ev_link_dest_get_top (dest, &change_top);
1591
1592         doc_point.x = 0;
1593         doc_point.y = change_top ? top : 0;
1594
1595         zoom = zoom_for_size_fit_width (doc_width, top,
1596                                         ev_view_get_width (view),
1597                                         ev_view_get_height (view));
1598
1599         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1600         ev_document_model_set_scale (view->model, zoom);
1601
1602         view->pending_point = doc_point;
1603
1604         ev_view_change_page (view, page, TRUE);
1605 }
1606
1607 static void
1608 goto_fit_dest (EvView *view, EvLinkDest *dest)
1609 {
1610         double zoom;
1611         gdouble doc_width, doc_height;
1612         int page;
1613
1614         page = ev_link_dest_get_page (dest);
1615         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1616
1617         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1618                                        ev_view_get_width (view),
1619                                        ev_view_get_height (view));
1620
1621         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1622         ev_document_model_set_scale (view->model, zoom);
1623
1624         ev_view_change_page (view, page, TRUE);
1625 }
1626
1627 static void
1628 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1629 {
1630         EvPoint doc_point;
1631         gint page;
1632         gdouble zoom, left, top;
1633         gboolean change_zoom, change_left, change_top;
1634
1635         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1636         page = ev_link_dest_get_page (dest);
1637
1638         if (change_zoom && zoom > 1) {
1639                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1640                 ev_document_model_set_scale (view->model, zoom);
1641         }
1642
1643         left = ev_link_dest_get_left (dest, &change_left);
1644         top = ev_link_dest_get_top (dest, &change_top);
1645
1646         doc_point.x = change_left ? left : 0;
1647         doc_point.y = change_top ? top : 0;
1648         view->pending_point = doc_point;
1649
1650         ev_view_change_page (view, page, TRUE);
1651 }
1652
1653 static void
1654 goto_dest (EvView *view, EvLinkDest *dest)
1655 {
1656         EvLinkDestType type;
1657         int page, n_pages, current_page;
1658
1659         page = ev_link_dest_get_page (dest);
1660         n_pages = ev_document_get_n_pages (view->document);
1661
1662         if (page < 0 || page >= n_pages)
1663                 return;
1664
1665         current_page = view->current_page;
1666
1667         type = ev_link_dest_get_dest_type (dest);
1668
1669         switch (type) {
1670                 case EV_LINK_DEST_TYPE_PAGE:
1671                         ev_document_model_set_page (view->model, page);
1672                         break;
1673                 case EV_LINK_DEST_TYPE_FIT:
1674                         goto_fit_dest (view, dest);
1675                         break;
1676                 case EV_LINK_DEST_TYPE_FITH:
1677                         goto_fith_dest (view, dest);
1678                         break;
1679                 case EV_LINK_DEST_TYPE_FITV:
1680                         goto_fitv_dest (view, dest);
1681                         break;
1682                 case EV_LINK_DEST_TYPE_FITR:
1683                         goto_fitr_dest (view, dest);
1684                         break;
1685                 case EV_LINK_DEST_TYPE_XYZ:
1686                         goto_xyz_dest (view, dest);
1687                         break;
1688                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1689                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1690                         break;
1691                 default:
1692                         g_assert_not_reached ();
1693         }
1694
1695         if (current_page != view->current_page)
1696                 ev_document_model_set_page (view->model, view->current_page);
1697 }
1698
1699 static void
1700 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1701 {
1702         EvLinkDestType type;
1703
1704         type = ev_link_dest_get_dest_type (dest);
1705
1706         if (type == EV_LINK_DEST_TYPE_NAMED) {
1707                 EvLinkDest  *dest2;
1708                 const gchar *named_dest;
1709
1710                 named_dest = ev_link_dest_get_named_dest (dest);
1711                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1712                                                           named_dest);
1713                 if (dest2) {
1714                         goto_dest (view, dest2);
1715                         g_object_unref (dest2);
1716                 }
1717
1718                 return;
1719         }
1720
1721         goto_dest (view, dest);
1722 }
1723
1724 void
1725 ev_view_handle_link (EvView *view, EvLink *link)
1726 {
1727         EvLinkAction    *action = NULL;
1728         EvLinkActionType type;
1729
1730         action = ev_link_get_action (link);
1731         if (!action)
1732                 return;
1733
1734         type = ev_link_action_get_action_type (action);
1735
1736         switch (type) {
1737                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1738                         EvLinkDest *dest;
1739
1740                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1741
1742                         dest = ev_link_action_get_dest (action);
1743                         ev_view_goto_dest (view, dest);
1744                 }
1745                         break;
1746                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1747                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1748                 case EV_LINK_ACTION_TYPE_LAUNCH:
1749                 case EV_LINK_ACTION_TYPE_NAMED:
1750                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1751                         break;
1752         }
1753 }
1754
1755 gchar *
1756 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1757 {
1758         EvLinkDestType type;
1759         gchar *msg = NULL;
1760
1761         type = ev_link_dest_get_dest_type (dest);
1762
1763         switch (type) {
1764                 case EV_LINK_DEST_TYPE_NAMED: {
1765                         EvLinkDest  *dest2;
1766                         const gchar *named_dest;
1767
1768                         named_dest = ev_link_dest_get_named_dest (dest);
1769                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1770                                                                   named_dest);
1771                         if (dest2) {
1772                                 msg = ev_document_get_page_label (view->document,
1773                                                                   ev_link_dest_get_page (dest2));
1774                                 g_object_unref (dest2);
1775                         }
1776                 }
1777
1778                         break;
1779                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1780                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1781                 }
1782                         break;
1783                 default:
1784                         msg = ev_document_get_page_label (view->document,
1785                                                           ev_link_dest_get_page (dest));
1786         }
1787
1788         return msg;
1789 }
1790
1791 static char *
1792 tip_from_action_named (EvLinkAction *action)
1793 {
1794         const gchar *name = ev_link_action_get_name (action);
1795
1796         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1797                 return g_strdup (_("Go to first page"));
1798         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1799                 return g_strdup (_("Go to previous page"));
1800         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1801                 return g_strdup (_("Go to next page"));
1802         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1803                 return g_strdup (_("Go to last page"));
1804         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1805                 return g_strdup (_("Go to page"));
1806         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1807                 return g_strdup (_("Find"));
1808         }
1809
1810         return NULL;
1811 }
1812
1813 static char *
1814 tip_from_link (EvView *view, EvLink *link)
1815 {
1816         EvLinkAction *action;
1817         EvLinkActionType type;
1818         char *msg = NULL;
1819         char *page_label;
1820         const char *title;
1821
1822         action = ev_link_get_action (link);
1823         title = ev_link_get_title (link);
1824
1825         if (!action)
1826                 return title ? g_strdup (title) : NULL;
1827
1828         type = ev_link_action_get_action_type (action);
1829
1830         switch (type) {
1831                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1832                         page_label = ev_view_page_label_from_dest (view,
1833                                                                    ev_link_action_get_dest (action));
1834                         if (page_label) {
1835                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1836                                 g_free (page_label);
1837                         }
1838                         break;
1839                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1840                         if (title) {
1841                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1842                                                        ev_link_action_get_filename (action));
1843                         } else {
1844                                 msg = g_strdup_printf (_("Go to file “%s”"),
1845                                                        ev_link_action_get_filename (action));
1846                         }
1847                         break;
1848                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1849                         msg = g_strdup (ev_link_action_get_uri (action));
1850                         break;
1851                 case EV_LINK_ACTION_TYPE_LAUNCH:
1852                         msg = g_strdup_printf (_("Launch %s"),
1853                                                ev_link_action_get_filename (action));
1854                         break;
1855                 case EV_LINK_ACTION_TYPE_NAMED:
1856                         msg = tip_from_action_named (action);
1857                         break;
1858                 default:
1859                         if (title)
1860                                 msg = g_strdup (title);
1861                         break;
1862         }
1863
1864         return msg;
1865 }
1866
1867 static void
1868 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1869 {
1870         EvLink       *link;
1871         EvFormField  *field;
1872         EvAnnotation *annot = NULL;
1873
1874         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1875                 return;
1876
1877         if (view->drag_info.in_drag) {
1878                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1879                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1880                 return;
1881         }
1882
1883         if (view->scroll_info.autoscrolling) {
1884                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1885                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1886                 return;
1887         }
1888
1889         link = ev_view_get_link_at_location (view, x, y);
1890         if (link) {
1891                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1892         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1893                 if (field->is_read_only) {
1894                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1895                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1896                             view->cursor == EV_VIEW_CURSOR_DRAG)
1897                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1898                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1899                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1900                 } else {
1901                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1902                 }
1903         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1904                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1905         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1906                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1907         } else {
1908                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1909                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1910                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1911                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1912                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1913         }
1914
1915         if (link || annot)
1916                 g_object_set (view, "has-tooltip", TRUE, NULL);
1917 }
1918
1919 /*** Images ***/
1920 static EvImage *
1921 ev_view_get_image_at_location (EvView  *view,
1922                                gdouble  x,
1923                                gdouble  y)
1924 {
1925         gint page = -1;
1926         gint x_new = 0, y_new = 0;
1927         GList *image_mapping;
1928
1929         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1930                 return NULL;
1931
1932         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1933                 return NULL;
1934
1935         image_mapping = ev_pixbuf_cache_get_image_mapping (view->pixbuf_cache, page);
1936
1937         if (image_mapping)
1938                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1939         else
1940                 return NULL;
1941 }
1942
1943 /*** Forms ***/
1944 static EvFormField *
1945 ev_view_get_form_field_at_location (EvView  *view,
1946                                     gdouble  x,
1947                                     gdouble  y)
1948 {
1949         gint page = -1;
1950         gint x_new = 0, y_new = 0;
1951         GList *forms_mapping;
1952
1953         if (!EV_IS_DOCUMENT_FORMS (view->document))
1954                 return NULL;
1955
1956         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1957                 return NULL;
1958
1959         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, page);
1960
1961         if (forms_mapping)
1962                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1963         else
1964                 return NULL;
1965 }
1966
1967 static GdkRegion *
1968 ev_view_form_field_get_region (EvView      *view,
1969                                EvFormField *field)
1970 {
1971         GdkRectangle view_area;
1972         GList       *forms_mapping;
1973
1974         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1975                                                                 field->page->index);
1976         ev_view_get_area_from_mapping (view, field->page->index,
1977                                        forms_mapping,
1978                                        field, &view_area);
1979
1980         return gdk_region_rectangle (&view_area);
1981 }
1982
1983 static gboolean
1984 ev_view_forms_remove_widgets (EvView *view)
1985 {
1986         ev_view_remove_all (view);
1987
1988         return FALSE;
1989 }
1990
1991 static void
1992 ev_view_form_field_destroy (GtkWidget *widget,
1993                             EvView    *view)
1994 {
1995         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1996 }
1997
1998 static GtkWidget *
1999 ev_view_form_field_button_create_widget (EvView      *view,
2000                                          EvFormField *field)
2001 {
2002         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
2003         GdkRegion         *field_region = NULL;
2004
2005         switch (field_button->type) {
2006                 case EV_FORM_FIELD_BUTTON_PUSH:
2007                         return NULL;
2008                 case EV_FORM_FIELD_BUTTON_CHECK:
2009                 case EV_FORM_FIELD_BUTTON_RADIO: {
2010                         gboolean  state;
2011                         GList    *forms_mapping, *l;
2012
2013                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
2014                                                                                field);
2015
2016                         /* FIXME: it actually depends on NoToggleToOff flags */
2017                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
2018                             state && field_button->state)
2019                                 return NULL;
2020
2021                         field_region = ev_view_form_field_get_region (view, field);
2022
2023                         /* For radio buttons and checkbox buttons that are in a set
2024                          * we need to update also the region for the current selected item
2025                          */
2026                         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2027                                                                                 field->page->index);
2028                         for (l = forms_mapping; l; l = g_list_next (l)) {
2029                                 EvFormField *button = ((EvMapping *)(l->data))->data;
2030                                 GdkRegion   *button_region;
2031
2032                                 if (button->id == field->id)
2033                                         continue;
2034
2035                                 /* FIXME: only buttons in the same group should be updated */
2036                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
2037                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
2038                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
2039                                         continue;
2040
2041                                 button_region = ev_view_form_field_get_region (view, button);
2042                                 gdk_region_union (field_region, button_region);
2043                                 gdk_region_destroy (button_region);
2044                         }
2045
2046                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
2047                                                                        field, !state);
2048                         field_button->state = !state;
2049                 }
2050                         break;
2051         }
2052
2053         ev_view_reload_page (view, field->page->index, field_region);
2054         gdk_region_destroy (field_region);
2055
2056         return NULL;
2057 }
2058
2059 static void
2060 ev_view_form_field_text_save (EvView    *view,
2061                               GtkWidget *widget)
2062 {
2063         EvFormField *field;
2064
2065         if (!view->document)
2066                 return;
2067
2068         field = g_object_get_data (G_OBJECT (widget), "form-field");
2069
2070         if (field->changed) {
2071                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2072                 GdkRegion       *field_region;
2073
2074                 field_region = ev_view_form_field_get_region (view, field);
2075
2076                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
2077                                                             field, field_text->text);
2078                 field->changed = FALSE;
2079                 ev_view_reload_page (view, field->page->index, field_region);
2080                 gdk_region_destroy (field_region);
2081         }
2082 }
2083
2084 static void
2085 ev_view_form_field_text_changed (GtkWidget   *widget,
2086                                  EvFormField *field)
2087 {
2088         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2089         gchar           *text = NULL;
2090
2091         if (GTK_IS_ENTRY (widget)) {
2092                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
2093         } else if (GTK_IS_TEXT_BUFFER (widget)) {
2094                 GtkTextIter start, end;
2095
2096                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
2097                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
2098                                                  &start, &end, FALSE);
2099         }
2100
2101         if (!field_text->text ||
2102             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
2103                 g_free (field_text->text);
2104                 field_text->text = text;
2105                 field->changed = TRUE;
2106         }
2107 }
2108
2109 static GtkWidget *
2110 ev_view_form_field_text_create_widget (EvView      *view,
2111                                        EvFormField *field)
2112 {
2113         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2114         GtkWidget       *text = NULL;
2115         gchar           *txt;
2116
2117         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2118                                                           field);
2119
2120         switch (field_text->type) {
2121                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2122                         /* TODO */
2123                 case EV_FORM_FIELD_TEXT_NORMAL:
2124                         text = gtk_entry_new ();
2125                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2126                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2127                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2128
2129                         if (txt) {
2130                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2131                                 g_free (txt);
2132                         }
2133
2134                         g_signal_connect (text, "changed",
2135                                           G_CALLBACK (ev_view_form_field_text_changed),
2136                                           field);
2137                         g_signal_connect_after (text, "activate",
2138                                                 G_CALLBACK (ev_view_form_field_destroy),
2139                                                 view);
2140                         break;
2141                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2142                         GtkTextBuffer *buffer;
2143
2144                         text = gtk_text_view_new ();
2145                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2146
2147                         if (txt) {
2148                                 gtk_text_buffer_set_text (buffer, txt, -1);
2149                                 g_free (txt);
2150                         }
2151
2152                         g_signal_connect (buffer, "changed",
2153                                           G_CALLBACK (ev_view_form_field_text_changed),
2154                                           field);
2155                 }
2156                         break;
2157         }
2158
2159         g_object_weak_ref (G_OBJECT (text),
2160                            (GWeakNotify)ev_view_form_field_text_save,
2161                            view);
2162
2163         return text;
2164 }
2165
2166 static void
2167 ev_view_form_field_choice_save (EvView    *view,
2168                                 GtkWidget *widget)
2169 {
2170         EvFormField *field;
2171
2172         if (!view->document)
2173                 return;
2174
2175         field = g_object_get_data (G_OBJECT (widget), "form-field");
2176
2177         if (field->changed) {
2178                 GList             *l;
2179                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2180                 GdkRegion         *field_region;
2181
2182                 field_region = ev_view_form_field_get_region (view, field);
2183
2184                 if (field_choice->is_editable) {
2185                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2186                                                                       field, field_choice->text);
2187                 } else {
2188                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2189                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2190                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2191                                                                                  field,
2192                                                                                  GPOINTER_TO_INT (l->data));
2193                         }
2194                 }
2195                 field->changed = FALSE;
2196                 ev_view_reload_page (view, field->page->index, field_region);
2197                 gdk_region_destroy (field_region);
2198         }
2199 }
2200
2201 static void
2202 ev_view_form_field_choice_changed (GtkWidget   *widget,
2203                                    EvFormField *field)
2204 {
2205         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2206
2207         if (GTK_IS_COMBO_BOX (widget)) {
2208                 gint item;
2209
2210                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2211                 if (!field_choice->selected_items ||
2212                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2213                         g_list_free (field_choice->selected_items);
2214                         field_choice->selected_items = NULL;
2215                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2216                                                                        GINT_TO_POINTER (item));
2217                         field->changed = TRUE;
2218                 }
2219
2220                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
2221                         gchar *text;
2222
2223                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
2224                         if (!field_choice->text ||
2225                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2226                                 g_free (field_choice->text);
2227                                 field_choice->text = text;
2228                                 field->changed = TRUE;
2229                         }
2230                 }
2231         } else if (GTK_IS_TREE_SELECTION (widget)) {
2232                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2233                 GtkTreeModel     *model;
2234                 GList            *items, *l;
2235
2236                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2237                 g_list_free (field_choice->selected_items);
2238                 field_choice->selected_items = NULL;
2239
2240                 for (l = items; l && l->data; l = g_list_next (l)) {
2241                         GtkTreeIter  iter;
2242                         GtkTreePath *path = (GtkTreePath *)l->data;
2243                         gint         item;
2244
2245                         gtk_tree_model_get_iter (model, &iter, path);
2246                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2247
2248                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2249                                                                        GINT_TO_POINTER (item));
2250
2251                         gtk_tree_path_free (path);
2252                 }
2253
2254                 g_list_free (items);
2255
2256                 field->changed = TRUE;
2257         }
2258 }
2259
2260 static GtkWidget *
2261 ev_view_form_field_choice_create_widget (EvView      *view,
2262                                          EvFormField *field)
2263 {
2264         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2265         GtkWidget         *choice;
2266         GtkTreeModel      *model;
2267         gint               n_items, i;
2268         gint               selected_item = 0;
2269
2270         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2271                                                                    field);
2272         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2273         for (i = 0; i < n_items; i++) {
2274                 GtkTreeIter iter;
2275                 gchar      *item;
2276
2277                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2278                                                                      field, i);
2279                 if (ev_document_forms_form_field_choice_is_item_selected (
2280                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2281                         selected_item = i;
2282                         /* FIXME: we need a get_selected_items function in poppler */
2283                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2284                                                                        GINT_TO_POINTER (i));
2285                 }
2286
2287                 if (item) {
2288                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2289                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2290                                             0, item,
2291                                             1, i,
2292                                             -1);
2293                         g_free (item);
2294                 }
2295         }
2296
2297         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2298                 GtkCellRenderer  *renderer;
2299                 GtkWidget        *tree_view;
2300                 GtkTreeSelection *selection;
2301
2302                 tree_view = gtk_tree_view_new_with_model (model);
2303                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2304
2305                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2306                 if (field_choice->multi_select) {
2307                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2308                 }
2309
2310                 /* TODO: set selected items */
2311
2312                 renderer = gtk_cell_renderer_text_new ();
2313                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2314                                                              0,
2315                                                              "choix", renderer,
2316                                                              "text", 0,
2317                                                              NULL);
2318
2319                 choice = gtk_scrolled_window_new (NULL, NULL);
2320                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2321                                                 GTK_POLICY_AUTOMATIC,
2322                                                 GTK_POLICY_AUTOMATIC);
2323                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2324                 gtk_widget_show (tree_view);
2325
2326                 g_signal_connect (selection, "changed",
2327                                   G_CALLBACK (ev_view_form_field_choice_changed),
2328                                   field);
2329                 g_signal_connect_after (selection, "changed",
2330                                         G_CALLBACK (ev_view_form_field_destroy),
2331                                         view);
2332         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2333                 gchar *text;
2334
2335                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2336                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2337                 if (text) {
2338                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2339                         g_free (text);
2340                 }
2341
2342                 g_signal_connect (choice, "changed",
2343                                   G_CALLBACK (ev_view_form_field_choice_changed),
2344                                   field);
2345                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
2346                                         G_CALLBACK (ev_view_form_field_destroy),
2347                                         view);
2348         } else { /* ComboBoxText */
2349                 GtkCellRenderer *renderer;
2350
2351                 choice = gtk_combo_box_new_with_model (model);
2352                 renderer = gtk_cell_renderer_text_new ();
2353                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2354                                             renderer, TRUE);
2355                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2356                                                 renderer,
2357                                                 "text", 0,
2358                                                 NULL);
2359                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2360                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2361
2362                 g_signal_connect (choice, "changed",
2363                                   G_CALLBACK (ev_view_form_field_choice_changed),
2364                                   field);
2365                 g_signal_connect_after (choice, "changed",
2366                                         G_CALLBACK (ev_view_form_field_destroy),
2367                                         view);
2368         }
2369
2370         g_object_unref (model);
2371
2372         g_object_weak_ref (G_OBJECT (choice),
2373                            (GWeakNotify)ev_view_form_field_choice_save,
2374                            view);
2375
2376         return choice;
2377 }
2378
2379 static void
2380 ev_view_handle_form_field (EvView      *view,
2381                            EvFormField *field,
2382                            gdouble      x,
2383                            gdouble      y)
2384 {
2385         GtkWidget   *field_widget = NULL;
2386         GList       *form_field_mapping;
2387         GdkRectangle view_area;
2388
2389         if (field->is_read_only)
2390                 return;
2391
2392         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2393                 field_widget = ev_view_form_field_button_create_widget (view, field);
2394         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2395                 field_widget = ev_view_form_field_text_create_widget (view, field);
2396         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2397                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2398         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2399                 /* TODO */
2400         }
2401
2402         /* Form field doesn't require a widget */
2403         if (!field_widget)
2404                 return;
2405
2406         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2407                                 g_object_ref (field),
2408                                 (GDestroyNotify)g_object_unref);
2409
2410         form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, field->page->index);
2411         ev_view_get_area_from_mapping (view, field->page->index,
2412                                        form_field_mapping,
2413                                        field, &view_area);
2414
2415         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2416         gtk_widget_show (field_widget);
2417         gtk_widget_grab_focus (field_widget);
2418 }
2419
2420 /* Annotations */
2421 static EvViewWindowChild *
2422 ev_view_get_window_child (EvView    *view,
2423                           GtkWidget *window)
2424 {
2425         GList *children = view->window_children;
2426
2427         while (children) {
2428                 EvViewWindowChild *child;
2429
2430                 child = (EvViewWindowChild *)children->data;
2431                 children = children->next;
2432
2433                 if (child->window == window)
2434                         return child;
2435         }
2436
2437         return NULL;
2438 }
2439
2440 static void
2441 ev_view_window_child_move (EvView            *view,
2442                            EvViewWindowChild *child,
2443                            gint               x,
2444                            gint               y)
2445 {
2446         child->x = x;
2447         child->y = y;
2448         gtk_window_move (GTK_WINDOW (child->window),
2449                          MAX (child->parent_x, x),
2450                          MAX (child->parent_y, y));
2451 }
2452
2453 static void
2454 ev_view_window_child_move_with_parent (EvView    *view,
2455                                        GtkWidget *window)
2456 {
2457         EvViewWindowChild *child;
2458         gint               root_x, root_y;
2459
2460         child = ev_view_get_window_child (view, window);
2461         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2462                                &root_x, &root_y);
2463         if (root_x != child->parent_x || root_y != child->parent_y) {
2464                 gint dest_x, dest_y;
2465
2466                 dest_x = child->x + (root_x - child->parent_x);
2467                 dest_y = child->y + (root_y - child->parent_y);
2468                 child->parent_x = root_x;
2469                 child->parent_y = root_y;
2470                 ev_view_window_child_move (view, child, dest_x, dest_y);
2471         }
2472
2473         if (child->visible && !GTK_WIDGET_VISIBLE (window))
2474                 gtk_widget_show (window);
2475 }
2476
2477 static void
2478 ev_view_window_child_put (EvView    *view,
2479                           GtkWidget *window,
2480                           guint      page,
2481                           gint       x,
2482                           gint       y,
2483                           gdouble    orig_x,
2484                           gdouble    orig_y)
2485 {
2486         EvViewWindowChild *child;
2487         gint               root_x, root_y;
2488
2489         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2490                                &root_x, &root_y);
2491
2492         child = g_new0 (EvViewWindowChild, 1);
2493         child->window = window;
2494         child->page = page;
2495         child->orig_x = orig_x;
2496         child->orig_y = orig_y;
2497         child->parent_x = root_x;
2498         child->parent_y = root_y;
2499         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2500         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2501
2502         if (child->visible)
2503                 gtk_widget_show (window);
2504         else
2505                 gtk_widget_hide (window);
2506
2507         view->window_children = g_list_append (view->window_children, child);
2508 }
2509
2510 static EvViewWindowChild *
2511 ev_view_find_window_child_for_annot (EvView       *view,
2512                                      guint         page,
2513                                      EvAnnotation *annot)
2514 {
2515         GList *children = view->window_children;
2516
2517         while (children) {
2518                 EvViewWindowChild *child;
2519                 EvAnnotation      *wannot;
2520
2521                 child = (EvViewWindowChild *)children->data;
2522                 children = children->next;
2523
2524                 if (child->page != page)
2525                         continue;
2526
2527                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2528                 if (wannot == annot || strcmp (wannot->name, annot->name) == 0)
2529                         return child;
2530         }
2531
2532         return NULL;
2533 }
2534
2535 static void
2536 ev_view_window_children_free (EvView *view)
2537 {
2538         GList *l;
2539
2540         if (!view->window_children)
2541                 return;
2542
2543         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2544                 EvViewWindowChild *child;
2545
2546                 child = (EvViewWindowChild *)l->data;
2547                 gtk_widget_destroy (GTK_WIDGET (child->window));
2548                 g_free (child);
2549         }
2550         g_list_free (view->window_children);
2551         view->window_children = NULL;
2552         view->window_child_focus = NULL;
2553 }
2554
2555 static void
2556 annotation_window_grab_focus (GtkWidget *widget,
2557                               EvView    *view)
2558 {
2559         if (view->window_child_focus)
2560                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2561         view->window_child_focus = ev_view_get_window_child (view, widget);
2562 }
2563
2564 static void
2565 annotation_window_closed (EvAnnotationWindow *window,
2566                           EvView             *view)
2567 {
2568         EvViewWindowChild *child;
2569
2570         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2571         child->visible = FALSE;
2572 }
2573
2574 static void
2575 annotation_window_moved (EvAnnotationWindow *window,
2576                          gint                x,
2577                          gint                y,
2578                          EvView             *view)
2579 {
2580         EvViewWindowChild *child;
2581         GdkRectangle       page_area;
2582         GtkBorder          border;
2583         GdkRectangle       view_rect;
2584         EvRectangle        doc_rect;
2585         gint               width, height;
2586
2587         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2588         if (child->x == x && child->y == y)
2589                 return;
2590
2591         child->moved = TRUE;
2592         child->x = x;
2593         child->y = y;
2594
2595         /* Window has been moved by the user,
2596          * we have to set a new origin in doc coords
2597          */
2598         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2599         view_rect.x = (x - child->parent_x) + view->scroll_x;
2600         view_rect.y = (y - child->parent_y) + view->scroll_y;
2601         view_rect.width = width;
2602         view_rect.height = height;
2603
2604         get_page_extents (view, child->page, &page_area, &border);
2605         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2606         child->orig_x = doc_rect.x1;
2607         child->orig_y = doc_rect.y1;
2608 }
2609
2610 static void
2611 ev_view_annotation_save (EvView       *view,
2612                          EvAnnotation *annot)
2613 {
2614         if (!view->document)
2615                 return;
2616
2617         if (!annot->changed)
2618                 return;
2619
2620         ev_document_annotations_annotation_set_contents (EV_DOCUMENT_ANNOTATIONS (view->document),
2621                                                          annot, annot->contents);
2622         annot->changed = FALSE;
2623 }
2624
2625 static void
2626 show_annotation_windows (EvView *view,
2627                          gint    page)
2628 {
2629         GList     *annots, *l;
2630         GtkWindow *parent;
2631
2632         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2633
2634         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2635
2636         for (l = annots; l && l->data; l = g_list_next (l)) {
2637                 EvAnnotation      *annot;
2638                 EvViewWindowChild *child;
2639                 GtkWidget         *window;
2640                 EvRectangle       *doc_rect;
2641                 GdkRectangle       view_rect;
2642
2643                 annot = ((EvMapping *)(l->data))->data;
2644
2645                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2646                         continue;
2647
2648                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2649                         continue;
2650
2651                 window = g_object_get_data (G_OBJECT (annot), "popup");
2652                 if (window) {
2653                         ev_view_window_child_move_with_parent (view, window);
2654                         continue;
2655                 }
2656
2657                 /* Look if we already have a popup for this annot */
2658                 child = ev_view_find_window_child_for_annot (view, page, annot);
2659                 window = child ? child->window : NULL;
2660                 if (window) {
2661                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2662                         g_object_set_data (G_OBJECT (annot), "popup", window);
2663                         ev_view_window_child_move_with_parent (view, window);
2664                 } else {
2665                         window = ev_annotation_window_new (annot, parent);
2666                         g_signal_connect (window, "grab_focus",
2667                                           G_CALLBACK (annotation_window_grab_focus),
2668                                           view);
2669                         g_signal_connect (window, "closed",
2670                                           G_CALLBACK (annotation_window_closed),
2671                                           view);
2672                         g_signal_connect (window, "moved",
2673                                           G_CALLBACK (annotation_window_moved),
2674                                           view);
2675                         g_object_set_data (G_OBJECT (annot), "popup", window);
2676
2677                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2678                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2679                         view_rect.x -= view->scroll_x;
2680                         view_rect.y -= view->scroll_y;
2681
2682                         ev_view_window_child_put (view, window, page,
2683                                                   view_rect.x, view_rect.y,
2684                                                   doc_rect->x1, doc_rect->y1);
2685
2686                         g_object_weak_ref (G_OBJECT (annot),
2687                                            (GWeakNotify)ev_view_annotation_save,
2688                                            view);
2689                 }
2690         }
2691 }
2692
2693 static void
2694 hide_annotation_windows (EvView *view,
2695                          gint    page)
2696 {
2697         GList *annots, *l;
2698
2699         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2700
2701         for (l = annots; l && l->data; l = g_list_next (l)) {
2702                 EvAnnotation *annot;
2703                 GtkWidget    *window;
2704
2705                 annot = ((EvMapping *)(l->data))->data;
2706
2707                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2708                         continue;
2709
2710                 window = g_object_get_data (G_OBJECT (annot), "popup");
2711                 if (window)
2712                         gtk_widget_hide (window);
2713         }
2714 }
2715
2716 static EvAnnotation *
2717 ev_view_get_annotation_at_location (EvView  *view,
2718                                     gdouble  x,
2719                                     gdouble  y)
2720 {
2721         gint page = -1;
2722         gint x_new = 0, y_new = 0;
2723         GList *annotations_mapping;
2724
2725         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2726                 return NULL;
2727
2728         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2729                 return NULL;
2730
2731         annotations_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2732
2733         if (annotations_mapping)
2734                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2735         else
2736                 return NULL;
2737 }
2738
2739 static void
2740 ev_view_handle_annotation (EvView       *view,
2741                            EvAnnotation *annot,
2742                            gdouble       x,
2743                            gdouble       y,
2744                            guint32       timestamp)
2745 {
2746         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2747                 GtkWidget *window;
2748
2749                 window = g_object_get_data (G_OBJECT (annot), "popup");
2750                 if (window) {
2751                         EvViewWindowChild *child;
2752
2753                         child = ev_view_get_window_child (view, window);
2754                         if (!child->visible) {
2755                                 child->visible = TRUE;
2756                                 ev_view_window_child_move (view, child, child->x, child->y);
2757                                 gtk_widget_show (window);
2758                         }
2759                 }
2760         }
2761
2762         if (EV_IS_ANNOTATION_ATTACHMENT (annot)) {
2763                 EvAttachment *attachment = EV_ANNOTATION_ATTACHMENT (annot)->attachment;
2764
2765                 if (attachment) {
2766                         GError *error = NULL;
2767
2768                         ev_attachment_open (attachment,
2769                                             gtk_widget_get_screen (GTK_WIDGET (view)),
2770                                             timestamp,
2771                                             &error);
2772
2773                         if (error) {
2774                                 g_warning ("%s", error->message);
2775                                 g_error_free (error);
2776                         }
2777                 }
2778         }
2779 }
2780
2781 /*** GtkWidget implementation ***/
2782
2783 static void
2784 ev_view_size_request_continuous_dual_page (EvView         *view,
2785                                            GtkRequisition *requisition)
2786 {
2787         int max_width;
2788         gint n_pages;
2789         GtkBorder border;
2790
2791         ev_view_get_max_page_size (view, &max_width, NULL);
2792         compute_border (view, max_width, max_width, &border);
2793
2794         n_pages = ev_document_get_n_pages (view->document) + 1;
2795
2796         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2797         get_page_y_offset (view, n_pages, &requisition->height);
2798
2799         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2800                 requisition->width = 1;
2801         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2802                 requisition->width = 1;
2803                 /* FIXME: This could actually be set on one page docs or docs
2804                  * with a strange aspect ratio. */
2805                 /* requisition->height = 1;*/
2806         }
2807 }
2808
2809 static void
2810 ev_view_size_request_continuous (EvView         *view,
2811                                  GtkRequisition *requisition)
2812 {
2813         int max_width;
2814         int n_pages;
2815         GtkBorder border;
2816
2817         ev_view_get_max_page_size (view, &max_width, NULL);
2818         n_pages = ev_document_get_n_pages (view->document);
2819         compute_border (view, max_width, max_width, &border);
2820
2821         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2822         get_page_y_offset (view, n_pages, &requisition->height);
2823
2824         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2825                 requisition->width = 1;
2826         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2827                 requisition->width = 1;
2828                 /* FIXME: This could actually be set on one page docs or docs
2829                  * with a strange aspect ratio. */
2830                 /* requisition->height = 1;*/
2831         }
2832 }
2833
2834 static void
2835 ev_view_size_request_dual_page (EvView         *view,
2836                                 GtkRequisition *requisition)
2837 {
2838         GtkBorder border;
2839         gint width, height;
2840
2841         /* Find the largest of the two. */
2842         ev_view_get_page_size (view,
2843                                view->current_page,
2844                                &width, &height);
2845         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
2846                 gint width_2, height_2;
2847                 ev_view_get_page_size (view,
2848                                        view->current_page + 1,
2849                                        &width_2, &height_2);
2850                 if (width_2 > width) {
2851                         width = width_2;
2852                         height = height_2;
2853                 }
2854         }
2855         compute_border (view, width, height, &border);
2856
2857         requisition->width = ((width + border.left + border.right) * 2) +
2858                 (view->spacing * 3);
2859         requisition->height = (height + border.top + border.bottom) +
2860                 (view->spacing * 2);
2861
2862         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2863                 requisition->width = 1;
2864         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2865                 requisition->width = 1;
2866                 requisition->height = 1;
2867         }
2868 }
2869
2870 static void
2871 ev_view_size_request_single_page (EvView         *view,
2872                                   GtkRequisition *requisition)
2873 {
2874         GtkBorder border;
2875         gint width, height;
2876
2877         ev_view_get_page_size (view, view->current_page, &width, &height);
2878         compute_border (view, width, height, &border);
2879
2880         requisition->width = width + border.left + border.right + (2 * view->spacing);
2881         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2882
2883         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2884                 requisition->width = 1;
2885                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2886         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2887                 requisition->width = 1;
2888                 requisition->height = 1;
2889         }
2890 }
2891
2892 static void
2893 ev_view_size_request (GtkWidget      *widget,
2894                       GtkRequisition *requisition)
2895 {
2896         EvView *view = EV_VIEW (widget);
2897
2898         if (view->document == NULL) {
2899                 requisition->width = 1;
2900                 requisition->height = 1;
2901                 return;
2902         }
2903
2904         if (view->presentation) {
2905                 requisition->width = 1;
2906                 requisition->height = 1;
2907                 return;
2908         }
2909
2910         if (view->continuous && view->dual_page)
2911                 ev_view_size_request_continuous_dual_page (view, requisition);
2912         else if (view->continuous)
2913                 ev_view_size_request_continuous (view, requisition);
2914         else if (view->dual_page)
2915                 ev_view_size_request_dual_page (view, requisition);
2916         else
2917                 ev_view_size_request_single_page (view, requisition);
2918 }
2919
2920 static void
2921 ev_view_size_allocate (GtkWidget      *widget,
2922                        GtkAllocation  *allocation)
2923 {
2924         EvView *view = EV_VIEW (widget);
2925         GList  *children, *l;
2926         gint    root_x, root_y;
2927
2928         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2929
2930         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2931             view->sizing_mode == EV_SIZING_BEST_FIT) {
2932                 ev_view_zoom_for_size (view,
2933                                        allocation->width,
2934                                        allocation->height);
2935                 ev_view_size_request (widget, &widget->requisition);
2936         }
2937
2938         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2939         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2940
2941         if (view->document)
2942                 view_update_range_and_current_page (view);
2943
2944         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2945         view->pending_resize = FALSE;
2946         view->pending_point.x = 0;
2947         view->pending_point.y = 0;
2948
2949         children = gtk_container_get_children (GTK_CONTAINER (widget));
2950         for (l = children; l && l->data; l = g_list_next (l)) {
2951                 EvFormField   *field;
2952                 GdkRectangle   view_area;
2953                 GList         *form_field_mapping;
2954                 GtkAllocation  child_allocation;
2955                 GtkRequisition child_requisition;
2956                 GtkWidget     *child = (GtkWidget *)l->data;
2957
2958                 field = g_object_get_data (G_OBJECT (child), "form-field");
2959                 if (!field)
2960                         continue;
2961
2962                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2963                                                                              field->page->index);
2964                 ev_view_get_area_from_mapping (view, field->page->index,
2965                                                form_field_mapping,
2966                                                field, &view_area);
2967
2968                 gtk_widget_size_request (child, &child_requisition);
2969                 if (child_requisition.width != view_area.width ||
2970                     child_requisition.height != view_area.height)
2971                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2972
2973                 gtk_container_child_get (GTK_CONTAINER (widget),
2974                                          child,
2975                                          "x", &child_allocation.x,
2976                                          "y", &child_allocation.y,
2977                                          NULL);
2978                 if (child_allocation.x != view_area.x ||
2979                     child_allocation.y != view_area.y) {
2980                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2981                 }
2982         }
2983         g_list_free (children);
2984
2985         if (view->window_children)
2986                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2987                                        &root_x, &root_y);
2988
2989         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2990                 EvViewWindowChild *child;
2991                 EvRectangle        doc_rect;
2992                 GdkRectangle       view_rect;
2993
2994                 child = (EvViewWindowChild *)l->data;
2995
2996                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
2997                 if (child->moved) {
2998                         doc_rect.x1 = child->orig_x;
2999                         doc_rect.y1 = child->orig_y;
3000                 }
3001                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
3002                 view_rect.x -= view->scroll_x;
3003                 view_rect.y -= view->scroll_y;
3004
3005                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
3006                         child->parent_x = root_x;
3007                         child->parent_y = root_y;
3008                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
3009                 }
3010         }
3011 }
3012
3013 static void
3014 ev_view_realize (GtkWidget *widget)
3015 {
3016         EvView *view = EV_VIEW (widget);
3017
3018         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
3019                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
3020
3021         gdk_window_set_events (view->layout.bin_window,
3022                                (gdk_window_get_events (view->layout.bin_window) |
3023                                 GDK_EXPOSURE_MASK |
3024                                 GDK_BUTTON_PRESS_MASK |
3025                                 GDK_BUTTON_RELEASE_MASK |
3026                                 GDK_SCROLL_MASK |
3027                                 GDK_KEY_PRESS_MASK |
3028                                 GDK_POINTER_MOTION_MASK |
3029                                 GDK_POINTER_MOTION_HINT_MASK |
3030                                 GDK_ENTER_NOTIFY_MASK |
3031                                 GDK_LEAVE_NOTIFY_MASK));
3032
3033         if (view->presentation)
3034                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
3035         else
3036                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
3037
3038         on_adjustment_value_changed (NULL, view);
3039 }
3040
3041 static gboolean
3042 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
3043 {
3044         EvView *view = EV_VIEW (widget);
3045         guint state;
3046
3047         state = event->state & gtk_accelerator_get_default_mod_mask ();
3048
3049         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
3050                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
3051                 if (event->direction == GDK_SCROLL_UP ||
3052                     event->direction == GDK_SCROLL_LEFT) {
3053                         if (ev_view_can_zoom_in (view)) {
3054                                 ev_view_zoom_in (view);
3055                         }
3056                 } else {
3057                         if (ev_view_can_zoom_out (view)) {
3058                                 ev_view_zoom_out (view);
3059                         }
3060                 }
3061
3062                 return TRUE;
3063         }
3064
3065         view->jump_to_find_result = FALSE;
3066
3067         /* Shift+Wheel scrolls the in the perpendicular direction */
3068         if (state & GDK_SHIFT_MASK) {
3069                 if (event->direction == GDK_SCROLL_UP)
3070                         event->direction = GDK_SCROLL_LEFT;
3071                 else if (event->direction == GDK_SCROLL_LEFT)
3072                         event->direction = GDK_SCROLL_UP;
3073                 else if (event->direction == GDK_SCROLL_DOWN)
3074                         event->direction = GDK_SCROLL_RIGHT;
3075                 else if (event->direction == GDK_SCROLL_RIGHT)
3076                         event->direction = GDK_SCROLL_DOWN;
3077
3078                 event->state &= ~GDK_SHIFT_MASK;
3079                 state &= ~GDK_SHIFT_MASK;
3080         }
3081
3082         if (state == 0 &&
3083             (view->presentation ||
3084              (view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous))) {
3085                 switch (event->direction) {
3086                         case GDK_SCROLL_DOWN:
3087                         case GDK_SCROLL_RIGHT:
3088                                 ev_view_next_page (view);
3089                                 break;
3090                         case GDK_SCROLL_UP:
3091                         case GDK_SCROLL_LEFT:
3092                                 ev_view_previous_page (view);
3093                                 break;
3094                 }
3095
3096                 return TRUE;
3097         }
3098
3099         return FALSE;
3100 }
3101
3102 static EvViewSelection *
3103 find_selection_for_page (EvView *view,
3104                          gint    page)
3105 {
3106         GList *list;
3107
3108         for (list = view->selection_info.selections; list != NULL; list = list->next) {
3109                 EvViewSelection *selection;
3110
3111                 selection = (EvViewSelection *) list->data;
3112
3113                 if (selection->page == page)
3114                         return selection;
3115         }
3116
3117         return NULL;
3118 }
3119
3120 static void
3121 draw_end_presentation_page (EvView       *view,
3122                             GdkRectangle *page_area)
3123 {
3124         PangoLayout *layout;
3125         PangoFontDescription *font_desc;
3126         gchar *markup;
3127         const gchar *text = _("End of presentation. Press Escape to exit.");
3128
3129         if (view->presentation_state != EV_PRESENTATION_END)
3130                 return;
3131
3132         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
3133         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
3134         pango_layout_set_markup (layout, markup, -1);
3135         g_free (markup);
3136
3137         font_desc = pango_font_description_new ();
3138         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
3139         pango_layout_set_font_description (layout, font_desc);
3140
3141         gtk_paint_layout (GTK_WIDGET (view)->style,
3142                           view->layout.bin_window,
3143                           GTK_WIDGET_STATE (view),
3144                           FALSE,
3145                           page_area,
3146                           GTK_WIDGET (view),
3147                           NULL,
3148                           page_area->x + 15,
3149                           page_area->y + 15,
3150                           layout);
3151
3152         pango_font_description_free (font_desc);
3153         g_object_unref (layout);
3154 }
3155
3156 static gboolean
3157 ev_view_expose_event (GtkWidget      *widget,
3158                       GdkEventExpose *event)
3159 {
3160         EvView  *view = EV_VIEW (widget);
3161         cairo_t *cr;
3162         gint     i;
3163
3164         if (view->animation) {
3165                 if (ev_transition_animation_ready (view->animation)) {
3166                         GdkRectangle page_area;
3167                         GtkBorder    border;
3168
3169                         if (get_page_extents (view, view->current_page, &page_area, &border)) {
3170                                 cr = gdk_cairo_create (view->layout.bin_window);
3171
3172                                 /* normalize to x=0, y=0 */
3173                                 cairo_translate (cr, page_area.x, page_area.y);
3174                                 page_area.x = page_area.y = 0;
3175
3176                                 ev_transition_animation_paint (view->animation, cr, page_area);
3177                                 cairo_destroy (cr);
3178                         }
3179                 }
3180
3181                 return TRUE;
3182         }
3183
3184         if (view->presentation) {
3185                 switch (view->presentation_state) {
3186                         case EV_PRESENTATION_END: {
3187                                 GdkRectangle area = {0};
3188
3189                                 area.width = widget->allocation.width;
3190                                 area.height = widget->allocation.height;
3191
3192                                 draw_end_presentation_page (view, &area);
3193                         }
3194                                 return FALSE;
3195                         case EV_PRESENTATION_BLACK:
3196                         case EV_PRESENTATION_WHITE:
3197                                 return FALSE;
3198                         case EV_PRESENTATION_NORMAL:
3199                         default:
3200                                 break;
3201                 }
3202         } else if (view->loading) {
3203                 GdkRectangle area = {0};
3204
3205                 area.width = widget->allocation.width;
3206                 area.height = widget->allocation.height;
3207
3208                 draw_loading_text (view,
3209                                    &area,
3210                                    &(event->area));
3211         }
3212
3213         if (view->document == NULL)
3214                 return FALSE;
3215
3216         cr = gdk_cairo_create (view->layout.bin_window);
3217
3218         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3219                 GdkRectangle page_area;
3220                 GtkBorder border;
3221                 gboolean page_ready = TRUE;
3222
3223                 if (!get_page_extents (view, i, &page_area, &border))
3224                         continue;
3225
3226                 page_area.x -= view->scroll_x;
3227                 page_area.y -= view->scroll_y;
3228
3229                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
3230
3231                 if (page_ready && view->find_pages && view->highlight_find_results)
3232                         highlight_find_results (view, i);
3233                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3234                         show_annotation_windows (view, i);
3235         }
3236
3237         cairo_destroy (cr);
3238
3239         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3240                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3241
3242         return FALSE;
3243 }
3244
3245 static gboolean
3246 ev_view_do_popup_menu (EvView *view,
3247                        gdouble x,
3248                        gdouble y)
3249 {
3250         EvLink       *link;
3251         EvImage      *image;
3252         EvAnnotation *annot;
3253
3254         image = ev_view_get_image_at_location (view, x, y);
3255         if (image) {
3256                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
3257                 return TRUE;
3258         }
3259
3260         link = ev_view_get_link_at_location (view, x, y);
3261         if (link) {
3262                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
3263                 return TRUE;
3264         }
3265
3266         annot = ev_view_get_annotation_at_location (view, x, y);
3267         if (annot) {
3268                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, annot);
3269                 return TRUE;
3270         }
3271
3272         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
3273
3274         return TRUE;
3275 }
3276
3277 static gboolean
3278 ev_view_popup_menu (GtkWidget *widget)
3279 {
3280         gint x, y;
3281
3282         gtk_widget_get_pointer (widget, &x, &y);
3283         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3284 }
3285
3286 static void
3287 get_link_area (EvView       *view,
3288                gint          x,
3289                gint          y,
3290                EvLink       *link,
3291                GdkRectangle *area)
3292 {
3293         GList *link_mapping;
3294         gint   page;
3295         gint   x_offset = 0, y_offset = 0;
3296
3297         x += view->scroll_x;
3298         y += view->scroll_y;
3299
3300         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3301
3302         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
3303         ev_view_get_area_from_mapping (view, page,
3304                                        link_mapping,
3305                                        link, area);
3306 }
3307
3308 static void
3309 get_annot_area (EvView       *view,
3310                gint          x,
3311                gint          y,
3312                EvAnnotation *annot,
3313                GdkRectangle *area)
3314 {
3315         GList *annots_mapping;
3316         gint   page;
3317         gint   x_offset = 0, y_offset = 0;
3318
3319         x += view->scroll_x;
3320         y += view->scroll_y;
3321
3322         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3323
3324         annots_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
3325         ev_view_get_area_from_mapping (view, page,
3326                                        annots_mapping,
3327                                        annot, area);
3328 }
3329
3330 static gboolean
3331 ev_view_query_tooltip (GtkWidget  *widget,
3332                        gint        x,
3333                        gint        y,
3334                        gboolean    keyboard_tip,
3335                        GtkTooltip *tooltip)
3336 {
3337         EvView       *view = EV_VIEW (widget);
3338         EvLink       *link;
3339         EvAnnotation *annot;
3340         gchar        *text;
3341
3342         annot = ev_view_get_annotation_at_location (view, x, y);
3343         if (annot && annot->contents) {
3344                 GdkRectangle annot_area;
3345
3346                 get_annot_area (view, x, y, annot, &annot_area);
3347                 gtk_tooltip_set_text (tooltip, annot->contents);
3348                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
3349
3350                 return TRUE;
3351         }
3352
3353         link = ev_view_get_link_at_location (view, x, y);
3354         if (!link)
3355                 return FALSE;
3356
3357         text = tip_from_link (view, link);
3358         if (text && g_utf8_validate (text, -1, NULL)) {
3359                 GdkRectangle link_area;
3360
3361                 get_link_area (view, x, y, link, &link_area);
3362                 gtk_tooltip_set_text (tooltip, text);
3363                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3364         }
3365         g_free (text);
3366
3367         return TRUE;
3368 }
3369
3370 static void
3371 start_selection_for_event (EvView         *view,
3372                            GdkEventButton *event)
3373 {
3374         clear_selection (view);
3375
3376         view->selection_info.start.x = event->x + view->scroll_x;
3377         view->selection_info.start.y = event->y + view->scroll_y;
3378
3379         switch (event->type) {
3380                 case GDK_2BUTTON_PRESS:
3381                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3382                         break;
3383                 case GDK_3BUTTON_PRESS:
3384                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3385                         break;
3386                 default:
3387                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3388                         return;
3389         }
3390
3391         /* In case of WORD or LINE, compute selections now */
3392         compute_selections (view,
3393                             view->selection_info.style,
3394                             &(view->selection_info.start),
3395                             &(view->selection_info.start));
3396 }
3397
3398 static gboolean
3399 ev_view_button_press_event (GtkWidget      *widget,
3400                             GdkEventButton *event)
3401 {
3402         EvView *view = EV_VIEW (widget);
3403
3404         if (!view->document)
3405                 return FALSE;
3406
3407         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3408                 gtk_widget_grab_focus (widget);
3409         }
3410
3411         if (view->window_child_focus) {
3412                 EvAnnotationWindow *window;
3413                 EvAnnotation       *annot;
3414
3415                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3416                 annot = ev_annotation_window_get_annotation (window);
3417                 ev_annotation_window_ungrab_focus (window);
3418                 ev_view_annotation_save (view, annot);
3419                 view->window_child_focus = NULL;
3420         }
3421
3422         view->pressed_button = event->button;
3423         view->selection_info.in_drag = FALSE;
3424
3425         if (view->scroll_info.autoscrolling)
3426                 return TRUE;
3427
3428         switch (event->button) {
3429                 case 1: {
3430                         EvImage *image;
3431                         EvAnnotation *annot;
3432                         EvFormField *field;
3433
3434                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3435                                 if (event->type == GDK_3BUTTON_PRESS) {
3436                                         start_selection_for_event (view, event);
3437                                 } else if (location_in_selected_text (view,
3438                                                                event->x + view->scroll_x,
3439                                                                event->y + view->scroll_y)) {
3440                                         view->selection_info.in_drag = TRUE;
3441                                 } else {
3442                                         start_selection_for_event (view, event);
3443                                 }
3444
3445                                 gtk_widget_queue_draw (widget);
3446                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3447                                 ev_view_handle_annotation (view, annot, event->x, event->y, event->time);
3448                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3449                                 ev_view_remove_all (view);
3450                                 ev_view_handle_form_field (view, field, event->x, event->y);
3451                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3452                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3453                                 if (view->image_dnd_info.image)
3454                                         g_object_unref (view->image_dnd_info.image);
3455                                 view->image_dnd_info.image = g_object_ref (image);
3456                                 view->image_dnd_info.in_drag = TRUE;
3457
3458                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3459                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3460                         } else {
3461                                 ev_view_remove_all (view);
3462
3463                                 if (EV_IS_SELECTION (view->document))
3464                                         start_selection_for_event (view, event);
3465                         }
3466                 }
3467                         return TRUE;
3468                 case 2:
3469                         /* use root coordinates as reference point because
3470                          * scrolling changes window relative coordinates */
3471                         view->drag_info.start.x = event->x_root;
3472                         view->drag_info.start.y = event->y_root;
3473                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3474                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3475
3476                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3477
3478                         return TRUE;
3479                 case 3:
3480                         view->scroll_info.start_y = event->y;
3481                         return ev_view_do_popup_menu (view, event->x, event->y);
3482         }
3483
3484         return FALSE;
3485 }
3486
3487 static void
3488 ev_view_remove_all (EvView *view)
3489 {
3490         GList *children, *child;
3491
3492         children = gtk_container_get_children (GTK_CONTAINER (view));
3493         for (child = children; child && child->data; child = g_list_next (child)) {
3494                 gtk_container_remove (GTK_CONTAINER (view),
3495                                       GTK_WIDGET (child->data));
3496         }
3497         g_list_free (children);
3498 }
3499
3500 /*** Drag and Drop ***/
3501 static void
3502 ev_view_drag_data_get (GtkWidget        *widget,
3503                        GdkDragContext   *context,
3504                        GtkSelectionData *selection_data,
3505                        guint             info,
3506                        guint             time)
3507 {
3508         EvView *view = EV_VIEW (widget);
3509
3510         switch (info) {
3511                 case TARGET_DND_TEXT:
3512                         if (EV_IS_SELECTION (view->document) &&
3513                             view->selection_info.selections) {
3514                                 gchar *text;
3515
3516                                 text = get_selected_text (view);
3517                                 gtk_selection_data_set_text (selection_data,
3518                                                              text,
3519                                                              strlen (text));
3520                                 g_free (text);
3521                         }
3522                         break;
3523                 case TARGET_DND_IMAGE:
3524                         if (view->image_dnd_info.image) {
3525                                 GdkPixbuf *pixbuf;
3526
3527                                 ev_document_doc_mutex_lock ();
3528                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3529                                                                        view->image_dnd_info.image);
3530                                 ev_document_doc_mutex_unlock ();
3531
3532                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3533                                 g_object_unref (pixbuf);
3534                         }
3535                         break;
3536                 case TARGET_DND_URI:
3537                         if (view->image_dnd_info.image) {
3538                                 GdkPixbuf   *pixbuf;
3539                                 const gchar *tmp_uri;
3540                                 gchar       *uris[2];
3541
3542                                 ev_document_doc_mutex_lock ();
3543                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3544                                                                        view->image_dnd_info.image);
3545                                 ev_document_doc_mutex_unlock ();
3546
3547                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3548                                 g_object_unref (pixbuf);
3549
3550                                 uris[0] = (gchar *)tmp_uri;
3551                                 uris[1] = NULL;
3552                                 gtk_selection_data_set_uris (selection_data, uris);
3553                         }
3554         }
3555 }
3556
3557 static gboolean
3558 ev_view_drag_motion (GtkWidget      *widget,
3559                      GdkDragContext *context,
3560                      gint            x,
3561                      gint            y,
3562                      guint           time)
3563 {
3564         if (gtk_drag_get_source_widget (context) == widget)
3565                 gdk_drag_status (context, 0, time);
3566         else
3567                 gdk_drag_status (context, context->suggested_action, time);
3568
3569         return TRUE;
3570 }
3571
3572 static gboolean
3573 selection_update_idle_cb (EvView *view)
3574 {
3575         compute_selections (view,
3576                             view->selection_info.style,
3577                             &view->selection_info.start,
3578                             &view->motion);
3579         view->selection_update_id = 0;
3580         return FALSE;
3581 }
3582
3583 static gboolean
3584 selection_scroll_timeout_cb (EvView *view)
3585 {
3586         gint x, y, shift = 0;
3587         GtkWidget *widget = GTK_WIDGET (view);
3588
3589         gtk_widget_get_pointer (widget, &x, &y);
3590
3591         if (y > widget->allocation.height) {
3592                 shift = (y - widget->allocation.height) / 2;
3593         } else if (y < 0) {
3594                 shift = y / 2;
3595         }
3596
3597         if (shift)
3598                 gtk_adjustment_set_value (view->vadjustment,
3599                                           CLAMP (view->vadjustment->value + shift,
3600                                           view->vadjustment->lower,
3601                                           view->vadjustment->upper -
3602                                           view->vadjustment->page_size));
3603
3604         if (x > widget->allocation.width) {
3605                 shift = (x - widget->allocation.width) / 2;
3606         } else if (x < 0) {
3607                 shift = x / 2;
3608         }
3609
3610         if (shift)
3611                 gtk_adjustment_set_value (view->hadjustment,
3612                                           CLAMP (view->hadjustment->value + shift,
3613                                           view->hadjustment->lower,
3614                                           view->hadjustment->upper -
3615                                           view->hadjustment->page_size));
3616
3617         return TRUE;
3618 }
3619
3620 static gboolean
3621 ev_view_drag_update_momentum (EvView *view)
3622 {
3623         int i;
3624         if (!view->drag_info.in_drag)
3625                 return FALSE;
3626
3627         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3628                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3629                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3630         }
3631
3632         /* Momentum is a moving average of 10ms granularity over
3633          * the last 100ms with each 10ms stored in buffer.
3634          */
3635
3636         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3637         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3638
3639         return TRUE;
3640 }
3641
3642 static gboolean
3643 ev_view_scroll_drag_release (EvView *view)
3644 {
3645         gdouble dhadj_value, dvadj_value;
3646         gdouble oldhadjustment, oldvadjustment;
3647
3648         view->drag_info.momentum.x /= 1.2;
3649         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3650
3651         dhadj_value = view->hadjustment->page_size *
3652                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
3653         dvadj_value = view->vadjustment->page_size *
3654                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
3655
3656         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3657         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3658
3659      /* When we reach the edges, we need either to absorb some momentum and bounce by
3660       * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3661      if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
3662            ((oldhadjustment + dhadj_value) < 0))
3663                 view->drag_info.momentum.x = 0;
3664         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
3665            ((oldvadjustment + dvadj_value) < 0))
3666                 view->drag_info.momentum.y = 0;
3667
3668         gtk_adjustment_set_value (view->hadjustment,
3669                                 MIN (oldhadjustment + dhadj_value,
3670                                 view->hadjustment->upper - view->hadjustment->page_size));
3671         gtk_adjustment_set_value (view->vadjustment,
3672                                 MIN (oldvadjustment + dvadj_value,
3673                                 view->vadjustment->upper - view->vadjustment->page_size));
3674
3675         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3676            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3677                 return FALSE;
3678         else
3679                 return TRUE;
3680 }
3681
3682 static gboolean
3683 ev_view_motion_notify_event (GtkWidget      *widget,
3684                              GdkEventMotion *event)
3685 {
3686         EvView *view = EV_VIEW (widget);
3687         gint x, y;
3688
3689         if (!view->document)
3690                 return FALSE;
3691
3692
3693         if (event->is_hint || event->window != view->layout.bin_window) {
3694             gtk_widget_get_pointer (widget, &x, &y);
3695         } else {
3696             x = event->x;
3697             y = event->y;
3698         }
3699
3700         if (view->scroll_info.autoscrolling) {
3701                 view->scroll_info.last_y = y;
3702                 return TRUE;
3703         }
3704
3705         if (view->selection_info.in_drag) {
3706                 if (gtk_drag_check_threshold (widget,
3707                                               view->selection_info.start.x,
3708                                               view->selection_info.start.y,
3709                                               x, y)) {
3710                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3711
3712                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3713
3714                         gtk_drag_begin (widget, target_list,
3715                                         GDK_ACTION_COPY,
3716                                         1, (GdkEvent *)event);
3717
3718                         view->selection_info.in_drag = FALSE;
3719
3720                         gtk_target_list_unref (target_list);
3721
3722                         return TRUE;
3723                 }
3724         } else if (view->image_dnd_info.in_drag) {
3725                 if (gtk_drag_check_threshold (widget,
3726                                               view->selection_info.start.x,
3727                                               view->selection_info.start.y,
3728                                               x, y)) {
3729                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3730
3731                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3732                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3733
3734                         gtk_drag_begin (widget, target_list,
3735                                         GDK_ACTION_COPY,
3736                                         1, (GdkEvent *)event);
3737
3738                         view->image_dnd_info.in_drag = FALSE;
3739
3740                         gtk_target_list_unref (target_list);
3741
3742                         return TRUE;
3743                 }
3744         }
3745
3746         switch (view->pressed_button) {
3747         case 1:
3748                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3749                  * documents only.
3750                  */
3751                 if (view->rotation != 0)
3752                         return FALSE;
3753
3754                 /* Schedule timeout to scroll during selection and additionally
3755                  * scroll once to allow arbitrary speed. */
3756                 if (!view->selection_scroll_id)
3757                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3758                                                                (GSourceFunc)selection_scroll_timeout_cb,
3759                                                                view);
3760                 else
3761                     selection_scroll_timeout_cb (view);
3762
3763                 view->selection_info.in_selection = TRUE;
3764                 view->motion.x = x + view->scroll_x;
3765                 view->motion.y = y + view->scroll_y;
3766
3767                 /* Queue an idle to handle the motion.  We do this because
3768                  * handling any selection events in the motion could be slower
3769                  * than new motion events reach us.  We always put it in the
3770                  * idle to make sure we catch up and don't visibly lag the
3771                  * mouse. */
3772                 if (!view->selection_update_id)
3773                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3774
3775                 return TRUE;
3776         case 2:
3777                 if (!view->drag_info.in_drag) {
3778                         gboolean start;
3779                         int i;
3780
3781                         start = gtk_drag_check_threshold (widget,
3782                                                           view->drag_info.start.x,
3783                                                           view->drag_info.start.y,
3784                                                           event->x_root,
3785                                                           event->y_root);
3786                         view->drag_info.in_drag = start;
3787                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3788                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3789                         /* Set 100 to choose how long it takes to build up momentum */
3790                         /* Clear out previous momentum info: */
3791                         for (i = 0; i < DRAG_HISTORY; i++) {
3792                                 view->drag_info.buffer[i].x = event->x;
3793                                 view->drag_info.buffer[i].y = event->y;
3794                         }
3795                         view->drag_info.momentum.x = 0;
3796                         view->drag_info.momentum.y = 0;
3797                 }
3798
3799                 if (view->drag_info.in_drag) {
3800                         int dx, dy;
3801                         gdouble dhadj_value, dvadj_value;
3802
3803                         view->drag_info.buffer[0].x = event->x;
3804                         view->drag_info.buffer[0].y = event->y;
3805
3806                         dx = event->x_root - view->drag_info.start.x;
3807                         dy = event->y_root - view->drag_info.start.y;
3808
3809                         dhadj_value = view->hadjustment->page_size *
3810                                       (gdouble)dx / widget->allocation.width;
3811                         dvadj_value = view->vadjustment->page_size *
3812                                       (gdouble)dy / widget->allocation.height;
3813
3814                         /* clamp scrolling to visible area */
3815                         gtk_adjustment_set_value (view->hadjustment,
3816                                                   MIN(view->drag_info.hadj - dhadj_value,
3817                                                       view->hadjustment->upper -
3818                                                       view->hadjustment->page_size));
3819                         gtk_adjustment_set_value (view->vadjustment,
3820                                                   MIN(view->drag_info.vadj - dvadj_value,
3821                                                       view->vadjustment->upper -
3822                                                       view->vadjustment->page_size));
3823
3824                         return TRUE;
3825                 }
3826
3827                 break;
3828         default:
3829                 ev_view_handle_cursor_over_xy (view, x, y);
3830         }
3831
3832         return FALSE;
3833 }
3834
3835 static gboolean
3836 ev_view_button_release_event (GtkWidget      *widget,
3837                               GdkEventButton *event)
3838 {
3839         EvView *view = EV_VIEW (widget);
3840         EvLink *link = NULL;
3841
3842         view->image_dnd_info.in_drag = FALSE;
3843
3844         if (view->scroll_info.autoscrolling) {
3845                 ev_view_autoscroll_stop (view);
3846                 view->pressed_button = -1;
3847
3848                 return TRUE;
3849         }
3850
3851         if (view->drag_info.in_drag) {
3852                 view->drag_info.release_timeout_id =
3853                         g_timeout_add (20,
3854                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3855         }
3856
3857         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3858                 link = ev_view_get_link_at_location (view, event->x, event->y);
3859         }
3860
3861         view->drag_info.in_drag = FALSE;
3862
3863         if (view->pressed_button == 2) {
3864                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3865         }
3866
3867         view->pressed_button = -1;
3868
3869         if (view->selection_scroll_id) {
3870             g_source_remove (view->selection_scroll_id);
3871             view->selection_scroll_id = 0;
3872         }
3873         if (view->selection_update_id) {
3874             g_source_remove (view->selection_update_id);
3875             view->selection_update_id = 0;
3876         }
3877
3878         if (view->selection_info.selections) {
3879                 clear_link_selected (view);
3880                 ev_view_update_primary_selection (view);
3881
3882                 if (view->selection_info.in_drag) {
3883                         clear_selection (view);
3884                         gtk_widget_queue_draw (widget);
3885                 }
3886
3887                 view->selection_info.in_drag = FALSE;
3888         } else if (link) {
3889                 if (event->button == 2) {
3890                         EvLinkAction    *action;
3891                         EvLinkActionType type;
3892
3893                         action = ev_link_get_action (link);
3894                         if (!action)
3895                                 return FALSE;
3896
3897                         type = ev_link_action_get_action_type (action);
3898                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3899                                 g_signal_emit (view,
3900                                                signals[SIGNAL_EXTERNAL_LINK],
3901                                                0, action);
3902                         }
3903                 } else {
3904                         ev_view_handle_link (view, link);
3905                 }
3906         } else if (view->presentation) {
3907                 switch (event->button) {
3908                         case 1:
3909                                 ev_view_next_page (view);
3910                                 return TRUE;
3911                         case 3:
3912                                 ev_view_previous_page (view);
3913                                 return TRUE;
3914                 }
3915         }
3916
3917         return FALSE;
3918 }
3919
3920 /* Goto Window */
3921 /* Cut and paste from gtkwindow.c */
3922 static void
3923 send_focus_change (GtkWidget *widget,
3924                    gboolean   in)
3925 {
3926         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3927
3928         g_object_ref (widget);
3929
3930         if (in)
3931                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3932         else
3933                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3934
3935         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3936         fevent->focus_change.window = g_object_ref (widget->window);
3937         fevent->focus_change.in = in;
3938
3939         gtk_widget_event (widget, fevent);
3940
3941         g_object_notify (G_OBJECT (widget), "has-focus");
3942
3943         g_object_unref (widget);
3944         gdk_event_free (fevent);
3945 }
3946
3947 static void
3948 ev_view_goto_window_hide (EvView *view)
3949 {
3950         /* send focus-in event */
3951         send_focus_change (view->goto_entry, FALSE);
3952         gtk_widget_hide (view->goto_window);
3953         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3954 }
3955
3956 static gboolean
3957 ev_view_goto_window_delete_event (GtkWidget   *widget,
3958                                   GdkEventAny *event,
3959                                   EvView      *view)
3960 {
3961         ev_view_goto_window_hide (view);
3962
3963         return TRUE;
3964 }
3965
3966 static gboolean
3967 key_is_numeric (guint keyval)
3968 {
3969         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3970                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3971 }
3972
3973 static gboolean
3974 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3975                                      GdkEventKey *event,
3976                                      EvView      *view)
3977 {
3978         switch (event->keyval) {
3979                 case GDK_Escape:
3980                 case GDK_Tab:
3981                 case GDK_KP_Tab:
3982                 case GDK_ISO_Left_Tab:
3983                         ev_view_goto_window_hide (view);
3984                         return TRUE;
3985                 case GDK_Return:
3986                 case GDK_KP_Enter:
3987                 case GDK_ISO_Enter:
3988                 case GDK_BackSpace:
3989                 case GDK_Delete:
3990                         return FALSE;
3991                 default:
3992                         if (!key_is_numeric (event->keyval))
3993                                 return TRUE;
3994         }
3995
3996         return FALSE;
3997 }
3998
3999 static gboolean
4000 ev_view_goto_window_button_press_event (GtkWidget      *widget,
4001                                         GdkEventButton *event,
4002                                         EvView         *view)
4003 {
4004         ev_view_goto_window_hide (view);
4005
4006         return TRUE;
4007 }
4008
4009 static void
4010 ev_view_goto_entry_activate (GtkEntry *entry,
4011                              EvView   *view)
4012 {
4013         const gchar *text;
4014         gint         page;
4015
4016         text = gtk_entry_get_text (entry);
4017         page = atoi (text) - 1;
4018
4019         ev_view_goto_window_hide (view);
4020
4021         if (page >= 0 && page < ev_document_get_n_pages (view->document)) {
4022                 ev_document_model_set_page (view->model, page);
4023         }
4024 }
4025
4026 static void
4027 ev_view_goto_window_create (EvView *view)
4028 {
4029         GtkWidget *frame, *hbox, *toplevel, *label;
4030
4031         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
4032
4033         if (view->goto_window) {
4034                 if (GTK_WINDOW (toplevel)->group)
4035                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
4036                                                      GTK_WINDOW (view->goto_window));
4037                 else if (GTK_WINDOW (view->goto_window)->group)
4038                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
4039                                                         GTK_WINDOW (view->goto_window));
4040                 return;
4041         }
4042
4043         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
4044         gtk_window_set_screen (GTK_WINDOW (view->goto_window),
4045                                gtk_widget_get_screen (GTK_WIDGET (view)));
4046
4047         if (GTK_WINDOW (toplevel)->group)
4048                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
4049                                              GTK_WINDOW (view->goto_window));
4050
4051         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
4052
4053         g_signal_connect (view->goto_window, "delete_event",
4054                           G_CALLBACK (ev_view_goto_window_delete_event),
4055                           view);
4056         g_signal_connect (view->goto_window, "key_press_event",
4057                           G_CALLBACK (ev_view_goto_window_key_press_event),
4058                           view);
4059         g_signal_connect (view->goto_window, "button_press_event",
4060                           G_CALLBACK (ev_view_goto_window_button_press_event),
4061                           view);
4062
4063         frame = gtk_frame_new (NULL);
4064         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
4065         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
4066         gtk_widget_show (frame);
4067
4068         hbox = gtk_hbox_new (FALSE, 0);
4069         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
4070         gtk_container_add (GTK_CONTAINER (frame), hbox);
4071         gtk_widget_show (hbox);
4072
4073         label = gtk_label_new(_("Jump to page:"));
4074         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
4075         gtk_widget_show (label);
4076         gtk_widget_realize (label);
4077
4078         view->goto_entry = gtk_entry_new ();
4079         g_signal_connect (view->goto_entry, "activate",
4080                           G_CALLBACK (ev_view_goto_entry_activate),
4081                           view);
4082         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
4083         gtk_widget_show (view->goto_entry);
4084         gtk_widget_realize (view->goto_entry);
4085 }
4086
4087 static void
4088 ev_view_goto_entry_grab_focus (EvView *view)
4089 {
4090         GtkWidgetClass *entry_parent_class;
4091
4092         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
4093         (entry_parent_class->grab_focus) (view->goto_entry);
4094
4095         send_focus_change (view->goto_entry, TRUE);
4096 }
4097
4098 static void
4099 ev_view_goto_window_send_key_event (EvView   *view,
4100                                     GdkEvent *event)
4101 {
4102         GdkEventKey *new_event;
4103         GdkScreen   *screen;
4104
4105         /* Move goto window off screen */
4106         screen = gtk_widget_get_screen (GTK_WIDGET (view));
4107         gtk_window_move (GTK_WINDOW (view->goto_window),
4108                          gdk_screen_get_width (screen) + 1,
4109                          gdk_screen_get_height (screen) + 1);
4110         gtk_widget_show (view->goto_window);
4111
4112         new_event = (GdkEventKey *) gdk_event_copy (event);
4113         g_object_unref (new_event->window);
4114         new_event->window = g_object_ref (view->goto_window->window);
4115         gtk_widget_realize (view->goto_window);
4116
4117         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
4118         gdk_event_free ((GdkEvent *)new_event);
4119         gtk_widget_hide (view->goto_window);
4120 }
4121
4122 static gboolean
4123 ev_view_key_press_event (GtkWidget   *widget,
4124                          GdkEventKey *event)
4125 {
4126         EvView *view = EV_VIEW (widget);
4127         EvPresentationState current;
4128
4129         if (!view->document)
4130                 return FALSE;
4131
4132         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
4133                 /* Forward key events to current focused window child */
4134                 if (view->window_child_focus) {
4135                         GdkEventKey *new_event;
4136                         gboolean     handled;
4137
4138                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
4139                         g_object_unref (new_event->window);
4140                         new_event->window = g_object_ref (view->window_child_focus->window->window);
4141                         gtk_widget_realize (view->window_child_focus->window);
4142                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
4143                         gdk_event_free ((GdkEvent *)new_event);
4144
4145                         return handled;
4146                 }
4147
4148                 return FALSE;
4149         }
4150
4151         if (!view->presentation ||
4152             view->presentation_state == EV_PRESENTATION_END)
4153                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4154
4155
4156         current = view->presentation_state;
4157
4158         switch (event->keyval) {
4159                 case GDK_b:
4160                 case GDK_B:
4161                 case GDK_period:
4162                 case GDK_KP_Decimal:
4163                         view->presentation_state =
4164                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
4165                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
4166                         break;
4167                 case GDK_w:
4168                 case GDK_W:
4169                         view->presentation_state =
4170                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
4171                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
4172                         break;
4173                 default:
4174                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
4175                             view->presentation_state == EV_PRESENTATION_WHITE) {
4176                                 view->presentation_state = EV_PRESENTATION_NORMAL;
4177                         }
4178         }
4179
4180         if (current == view->presentation_state) {
4181                 if (ev_document_get_n_pages (view->document) > 1 &&
4182                     key_is_numeric (event->keyval)) {
4183                         gint x, y;
4184
4185                         ev_view_goto_window_create (view);
4186                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
4187                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4188                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
4189                         gtk_widget_show (view->goto_window);
4190                         ev_view_goto_entry_grab_focus (view);
4191
4192                         return TRUE;
4193                 }
4194
4195                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4196         }
4197
4198         switch (view->presentation_state) {
4199                 case EV_PRESENTATION_NORMAL:
4200                 case EV_PRESENTATION_BLACK:
4201                         gdk_window_set_background (view->layout.bin_window,
4202                                                    &widget->style->black);
4203                         break;
4204                 case EV_PRESENTATION_WHITE:
4205                         gdk_window_set_background (view->layout.bin_window,
4206                                                    &widget->style->white);
4207                         break;
4208                 default:
4209                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4210         }
4211
4212         gtk_widget_queue_draw (widget);
4213         return TRUE;
4214 }
4215
4216 static gint
4217 ev_view_focus_in (GtkWidget     *widget,
4218                   GdkEventFocus *event)
4219 {
4220         if (EV_VIEW (widget)->pixbuf_cache)
4221                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4222         gtk_widget_queue_draw (widget);
4223
4224         return FALSE;
4225 }
4226
4227 static gint
4228 ev_view_focus_out (GtkWidget     *widget,
4229                      GdkEventFocus *event)
4230 {
4231         if (EV_VIEW (widget)->goto_window)
4232                 ev_view_goto_window_hide (EV_VIEW (widget));
4233
4234         if (EV_VIEW (widget)->pixbuf_cache)
4235                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4236         gtk_widget_queue_draw (widget);
4237
4238         return FALSE;
4239 }
4240
4241 static gboolean
4242 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4243 {
4244         EvView *view = EV_VIEW (widget);
4245
4246         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4247                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4248
4249         return FALSE;
4250 }
4251
4252 static gboolean
4253 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4254 {
4255         EvView *view = EV_VIEW (widget);
4256
4257         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4258
4259         return FALSE;
4260 }
4261
4262 static void
4263 ev_view_style_set (GtkWidget *widget,
4264                    GtkStyle  *old_style)
4265 {
4266         if (EV_VIEW (widget)->pixbuf_cache)
4267                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4268
4269         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
4270 }
4271
4272 /*** Drawing ***/
4273
4274 static guint32
4275 ev_gdk_color_to_rgb (const GdkColor *color)
4276 {
4277   guint32 result;
4278   result = (0xff0000 | (color->red & 0xff00));
4279   result <<= 8;
4280   result |= ((color->green & 0xff00) | (color->blue >> 8));
4281   return result;
4282 }
4283
4284 static void
4285 draw_rubberband (GtkWidget *widget, GdkWindow *window,
4286                  const GdkRectangle *rect, guchar alpha)
4287 {
4288         GdkGC *gc;
4289         GdkPixbuf *pixbuf;
4290         GdkColor *fill_color_gdk;
4291         guint fill_color;
4292
4293         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
4294         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
4295
4296         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
4297                                  rect->width, rect->height);
4298         gdk_pixbuf_fill (pixbuf, fill_color);
4299
4300         gdk_draw_pixbuf (window, NULL, pixbuf,
4301                          0, 0,
4302                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4303                          rect->width, rect->height,
4304                          GDK_RGB_DITHER_NONE,
4305                          0, 0);
4306
4307         g_object_unref (pixbuf);
4308
4309         gc = gdk_gc_new (window);
4310         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
4311         gdk_draw_rectangle (window, gc, FALSE,
4312                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4313                             rect->width - 1,
4314                             rect->height - 1);
4315         g_object_unref (gc);
4316
4317         gdk_color_free (fill_color_gdk);
4318 }
4319
4320
4321 static void
4322 highlight_find_results (EvView *view, int page)
4323 {
4324         gint i, n_results = 0;
4325
4326         n_results = ev_view_find_get_n_results (view, page);
4327
4328         for (i = 0; i < n_results; i++) {
4329                 EvRectangle *rectangle;
4330                 GdkRectangle view_rectangle;
4331                 guchar alpha;
4332
4333                 if (i == view->find_result && page == view->current_page) {
4334                         alpha = 0x90;
4335                 } else {
4336                         alpha = 0x20;
4337                 }
4338
4339                 rectangle = ev_view_find_get_result (view, page, i);
4340                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4341                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
4342                                  &view_rectangle, alpha);
4343         }
4344 }
4345
4346 static void
4347 draw_loading_text (EvView       *view,
4348                    GdkRectangle *page_area,
4349                    GdkRectangle *expose_area)
4350 {
4351         cairo_t *cr;
4352         gint     width, height;
4353
4354         if (!view->loading_text) {
4355                 const gchar *loading_text = _("Loading...");
4356                 PangoLayout *layout;
4357                 PangoFontDescription *font_desc;
4358                 PangoRectangle logical_rect;
4359                 gint target_width;
4360                 gdouble real_scale;
4361
4362                 ev_document_fc_mutex_lock ();
4363
4364                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
4365
4366                 font_desc = pango_font_description_new ();
4367
4368                 /* We set the font to be 10 points, get the size, and scale appropriately */
4369                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
4370                 pango_layout_set_font_description (layout, font_desc);
4371                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4372
4373                 target_width = MAX (page_area->width / 2, 1);
4374                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
4375                 pango_font_description_set_size (font_desc, (int)real_scale);
4376                 pango_layout_set_font_description (layout, font_desc);
4377                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4378
4379                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
4380                                                                  logical_rect.width,
4381                                                                  logical_rect.height);
4382                 cr = cairo_create (view->loading_text);
4383                 cairo_set_source_rgb (cr,
4384                                       155 / (double)255,
4385                                       155 / (double)255,
4386                                       155 / (double)255);
4387                 pango_cairo_show_layout (cr, layout);
4388                 cairo_destroy (cr);
4389
4390                 pango_font_description_free (font_desc);
4391                 g_object_unref (layout);
4392
4393                 ev_document_fc_mutex_unlock ();
4394         }
4395
4396         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
4397         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
4398
4399         cr = gdk_cairo_create (view->layout.bin_window);
4400         cairo_translate (cr,
4401                          page_area->x + width,
4402                          page_area->y + height);
4403         cairo_set_source_surface (cr, view->loading_text, 0, 0);
4404         cairo_paint (cr);
4405         cairo_destroy (cr);
4406 }
4407
4408 static void
4409 draw_one_page (EvView       *view,
4410                gint          page,
4411                cairo_t      *cr,
4412                GdkRectangle *page_area,
4413                GtkBorder    *border,
4414                GdkRectangle *expose_area,
4415                gboolean     *page_ready)
4416 {
4417         GdkRectangle overlap;
4418         GdkRectangle real_page_area;
4419
4420         g_assert (view->document);
4421
4422         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4423                 return;
4424
4425         /* Render the document itself */
4426         real_page_area = *page_area;
4427
4428         real_page_area.x += border->left;
4429         real_page_area.y += border->top;
4430         real_page_area.width -= (border->left + border->right);
4431         real_page_area.height -= (border->top + border->bottom);
4432         *page_ready = TRUE;
4433
4434         if (!view->presentation) {
4435                 gint current_page;
4436
4437                 current_page = ev_document_model_get_page (view->model);
4438                 ev_document_misc_paint_one_page (view->layout.bin_window,
4439                                                  GTK_WIDGET (view),
4440                                                  page_area, border,
4441                                                  page == current_page);
4442         }
4443
4444         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4445                 gint             width, height;
4446                 gint             page_width, page_height;
4447                 cairo_surface_t *page_surface = NULL;
4448                 gint             selection_width, selection_height;
4449                 cairo_surface_t *selection_surface = NULL;
4450
4451                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4452
4453                 if (!page_surface) {
4454                         if (!view->presentation) {
4455                                 draw_loading_text (view,
4456                                                    &real_page_area,
4457                                                    expose_area);
4458                         }
4459
4460                         *page_ready = FALSE;
4461
4462                         return;
4463                 }
4464
4465                 ev_view_get_page_size (view, page, &width, &height);
4466
4467                 page_width = cairo_image_surface_get_width (page_surface);
4468                 page_height = cairo_image_surface_get_height (page_surface);
4469
4470                 cairo_save (cr);
4471                 cairo_translate (cr, overlap.x, overlap.y);
4472
4473                 if (width != page_width || height != page_height) {
4474                         cairo_pattern_set_filter (cairo_get_source (cr),
4475                                                   CAIRO_FILTER_FAST);
4476                         cairo_scale (cr,
4477                                      (gdouble)width / page_width,
4478                                      (gdouble)height / page_height);
4479                 }
4480
4481                 cairo_surface_set_device_offset (page_surface,
4482                                                  overlap.x - real_page_area.x,
4483                                                  overlap.y - real_page_area.y);
4484                 cairo_set_source_surface (cr, page_surface, 0, 0);
4485                 cairo_paint (cr);
4486                 cairo_restore (cr);
4487
4488                 /* Get the selection pixbuf iff we have something to draw */
4489                 if (find_selection_for_page (view, page) &&
4490                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4491                         selection_surface =
4492                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4493                                                                        page,
4494                                                                        view->scale,
4495                                                                        NULL);
4496                 }
4497
4498                 if (!selection_surface) {
4499                         return;
4500                 }
4501
4502                 selection_width = cairo_image_surface_get_width (selection_surface);
4503                 selection_height = cairo_image_surface_get_height (selection_surface);
4504
4505                 cairo_save (cr);
4506                 cairo_translate (cr, overlap.x, overlap.y);
4507
4508                 if (width != selection_width || height != selection_height) {
4509                         cairo_pattern_set_filter (cairo_get_source (cr),
4510                                                   CAIRO_FILTER_FAST);
4511                         cairo_scale (cr,
4512                                      (gdouble)width / selection_width,
4513                                      (gdouble)height / selection_height);
4514                 }
4515
4516                 cairo_surface_set_device_offset (selection_surface,
4517                                                  overlap.x - real_page_area.x,
4518                                                  overlap.y - real_page_area.y);
4519                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4520                 cairo_paint (cr);
4521                 cairo_restore (cr);
4522         }
4523 }
4524
4525 /*** GObject functions ***/
4526
4527 static void
4528 ev_view_finalize (GObject *object)
4529 {
4530         EvView *view = EV_VIEW (object);
4531
4532         clear_selection (view);
4533         clear_link_selected (view);
4534
4535         if (view->image_dnd_info.image)
4536                 g_object_unref (view->image_dnd_info.image);
4537         view->image_dnd_info.image = NULL;
4538
4539         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4540 }
4541
4542 static void
4543 ev_view_destroy (GtkObject *object)
4544 {
4545         EvView *view = EV_VIEW (object);
4546
4547         if (view->model) {
4548                 g_object_unref (view->model);
4549                 view->model = NULL;
4550         }
4551
4552         if (view->document) {
4553                 g_object_unref (view->document);
4554                 view->document = NULL;
4555         }
4556
4557         if (view->pixbuf_cache) {
4558                 g_object_unref (view->pixbuf_cache);
4559                 view->pixbuf_cache = NULL;
4560         }
4561
4562         if (view->goto_window) {
4563                 gtk_widget_destroy (view->goto_window);
4564                 view->goto_window = NULL;
4565                 view->goto_entry = NULL;
4566         }
4567
4568         ev_view_window_children_free (view);
4569
4570         if (view->selection_scroll_id) {
4571             g_source_remove (view->selection_scroll_id);
4572             view->selection_scroll_id = 0;
4573         }
4574
4575         if (view->selection_update_id) {
4576             g_source_remove (view->selection_update_id);
4577             view->selection_update_id = 0;
4578         }
4579
4580         if (view->loading_text) {
4581                 cairo_surface_destroy (view->loading_text);
4582                 view->loading_text = NULL;
4583         }
4584
4585         if (view->scroll_info.timeout_id) {
4586             g_source_remove (view->scroll_info.timeout_id);
4587             view->scroll_info.timeout_id = 0;
4588         }
4589
4590         if (view->drag_info.drag_timeout_id) {
4591                 g_source_remove (view->drag_info.drag_timeout_id);
4592                 view->drag_info.drag_timeout_id = 0;
4593         }
4594
4595         if (view->drag_info.release_timeout_id) {
4596                 g_source_remove (view->drag_info.release_timeout_id);
4597                 view->drag_info.release_timeout_id = 0;
4598         }
4599
4600         ev_view_presentation_transition_stop (view);
4601
4602         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4603
4604         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4605 }
4606
4607 static void
4608 ev_view_set_property (GObject      *object,
4609                       guint         prop_id,
4610                       const GValue *value,
4611                       GParamSpec   *pspec)
4612 {
4613         EvView *view = EV_VIEW (object);
4614
4615         switch (prop_id) {
4616                 case PROP_CONTINUOUS:
4617                         ev_view_set_continuous (view, g_value_get_boolean (value));
4618                         break;
4619                 case PROP_DUAL_PAGE:
4620                         ev_view_set_dual_page (view, g_value_get_boolean (value));
4621                         break;
4622                 case PROP_FULLSCREEN:
4623                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
4624                         break;
4625                 case PROP_PRESENTATION:
4626                         ev_view_set_presentation (view, g_value_get_boolean (value));
4627                         break;
4628                 case PROP_SIZING_MODE:
4629                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
4630                         break;
4631                 case PROP_ZOOM:
4632                         ev_view_set_zoom (view, g_value_get_double (value));
4633                         break;
4634                 case PROP_ROTATION:
4635                         ev_view_set_rotation (view, g_value_get_int (value));
4636                         break;
4637                 default:
4638                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4639         }
4640 }
4641
4642 static AtkObject *
4643 ev_view_get_accessible (GtkWidget *widget)
4644 {
4645         static gboolean first_time = TRUE;
4646
4647         if (first_time) {
4648                 AtkObjectFactory *factory;
4649                 AtkRegistry *registry;
4650                 GType derived_type;
4651                 GType derived_atk_type;
4652
4653                 /*
4654                  * Figure out whether accessibility is enabled by looking at the
4655                  * type of the accessible object which would be created for
4656                  * the parent type of EvView.
4657                  */
4658                 derived_type = g_type_parent (EV_TYPE_VIEW);
4659
4660                 registry = atk_get_default_registry ();
4661                 factory = atk_registry_get_factory (registry,
4662                                                     derived_type);
4663                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4664                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4665                         atk_registry_set_factory_type (registry,
4666                                                        EV_TYPE_VIEW,
4667                                                        ev_view_accessible_factory_get_type ());
4668                 first_time = FALSE;
4669         }
4670         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4671 }
4672
4673 static void
4674 ev_view_get_property (GObject *object,
4675                       guint prop_id,
4676                       GValue *value,
4677                       GParamSpec *pspec)
4678 {
4679         EvView *view = EV_VIEW (object);
4680
4681         switch (prop_id) {
4682                 case PROP_CONTINUOUS:
4683                         g_value_set_boolean (value, view->continuous);
4684                         break;
4685                 case PROP_DUAL_PAGE:
4686                         g_value_set_boolean (value, view->dual_page);
4687                         break;
4688                 case PROP_FULLSCREEN:
4689                         g_value_set_boolean (value, view->fullscreen);
4690                         break;
4691                 case PROP_PRESENTATION:
4692                         g_value_set_boolean (value, view->presentation);
4693                         break;
4694                 case PROP_SIZING_MODE:
4695                         g_value_set_enum (value, view->sizing_mode);
4696                         break;
4697                 case PROP_ZOOM:
4698                         g_value_set_double (value, view->scale);
4699                         break;
4700                 case PROP_ROTATION:
4701                         g_value_set_int (value, view->rotation);
4702                         break;
4703                 case PROP_HAS_SELECTION:
4704                         g_value_set_boolean (value,
4705                                              view->selection_info.selections != NULL);
4706                         break;
4707                 default:
4708                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4709         }
4710 }
4711
4712 static void
4713 ev_view_class_init (EvViewClass *class)
4714 {
4715         GObjectClass *object_class = G_OBJECT_CLASS (class);
4716         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4717         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4718         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4719         GtkBindingSet *binding_set;
4720
4721         object_class->finalize = ev_view_finalize;
4722         object_class->set_property = ev_view_set_property;
4723         object_class->get_property = ev_view_get_property;
4724
4725         widget_class->expose_event = ev_view_expose_event;
4726         widget_class->button_press_event = ev_view_button_press_event;
4727         widget_class->motion_notify_event = ev_view_motion_notify_event;
4728         widget_class->button_release_event = ev_view_button_release_event;
4729         widget_class->key_press_event = ev_view_key_press_event;
4730         widget_class->focus_in_event = ev_view_focus_in;
4731         widget_class->focus_out_event = ev_view_focus_out;
4732         widget_class->get_accessible = ev_view_get_accessible;
4733         widget_class->size_request = ev_view_size_request;
4734         widget_class->size_allocate = ev_view_size_allocate;
4735         widget_class->realize = ev_view_realize;
4736         widget_class->scroll_event = ev_view_scroll_event;
4737         widget_class->enter_notify_event = ev_view_enter_notify_event;
4738         widget_class->leave_notify_event = ev_view_leave_notify_event;
4739         widget_class->style_set = ev_view_style_set;
4740         widget_class->drag_data_get = ev_view_drag_data_get;
4741         widget_class->drag_motion = ev_view_drag_motion;
4742         widget_class->popup_menu = ev_view_popup_menu;
4743         widget_class->query_tooltip = ev_view_query_tooltip;
4744
4745         gtk_object_class->destroy = ev_view_destroy;
4746
4747         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4748
4749         class->binding_activated = ev_view_scroll;
4750
4751         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4752                          G_TYPE_FROM_CLASS (object_class),
4753                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4754                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4755                          NULL, NULL,
4756                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4757                          G_TYPE_NONE, 2,
4758                          GTK_TYPE_SCROLL_TYPE,
4759                          G_TYPE_BOOLEAN);
4760         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4761                          G_TYPE_FROM_CLASS (object_class),
4762                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4763                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4764                          NULL, NULL,
4765                          g_cclosure_marshal_VOID__OBJECT,
4766                          G_TYPE_NONE, 1,
4767                          G_TYPE_OBJECT);
4768         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4769                          G_TYPE_FROM_CLASS (object_class),
4770                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4771                          G_STRUCT_OFFSET (EvViewClass, external_link),
4772                          NULL, NULL,
4773                          g_cclosure_marshal_VOID__OBJECT,
4774                          G_TYPE_NONE, 1,
4775                          G_TYPE_OBJECT);
4776         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4777                          G_TYPE_FROM_CLASS (object_class),
4778                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4779                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4780                          NULL, NULL,
4781                          g_cclosure_marshal_VOID__OBJECT,
4782                          G_TYPE_NONE, 1,
4783                          G_TYPE_OBJECT);
4784
4785
4786         g_object_class_install_property (object_class,
4787                                          PROP_CONTINUOUS,
4788                                          g_param_spec_boolean ("continuous",
4789                                                                "Continuous",
4790                                                                "Continuous scrolling mode",
4791                                                                TRUE,
4792                                                                G_PARAM_READWRITE));
4793
4794         g_object_class_install_property (object_class,
4795                                          PROP_DUAL_PAGE,
4796                                          g_param_spec_boolean ("dual-page",
4797                                                                "Dual Page",
4798                                                                "Two pages visible at once",
4799                                                                FALSE,
4800                                                                G_PARAM_READWRITE));
4801         g_object_class_install_property (object_class,
4802                                          PROP_FULLSCREEN,
4803                                          g_param_spec_boolean ("fullscreen",
4804                                                                "Full Screen",
4805                                                                "Draw page in a fullscreen fashion",
4806                                                                FALSE,
4807                                                                G_PARAM_READWRITE));
4808         g_object_class_install_property (object_class,
4809                                          PROP_PRESENTATION,
4810                                          g_param_spec_boolean ("presentation",
4811                                                                "Presentation",
4812                                                                "Draw page in presentation mode",
4813                                                                TRUE,
4814                                                                G_PARAM_READWRITE));
4815
4816         g_object_class_install_property (object_class,
4817                                          PROP_SIZING_MODE,
4818                                          g_param_spec_enum ("sizing-mode",
4819                                                             "Sizing Mode",
4820                                                             "Sizing Mode",
4821                                                             EV_TYPE_SIZING_MODE,
4822                                                             EV_SIZING_FIT_WIDTH,
4823                                                             G_PARAM_READWRITE));
4824
4825         g_object_class_install_property (object_class,
4826                                          PROP_ZOOM,
4827                                          g_param_spec_double ("zoom",
4828                                                               "Zoom factor",
4829                                                               "Zoom factor",
4830                                                               0,
4831                                                               G_MAXDOUBLE,
4832                                                               1.0,
4833                                                               G_PARAM_READWRITE));
4834         g_object_class_install_property (object_class,
4835                                          PROP_ROTATION,
4836                                          g_param_spec_double ("rotation",
4837                                                               "Rotation",
4838                                                               "Rotation",
4839                                                               0,
4840                                                               360,
4841                                                               0,
4842                                                               G_PARAM_READWRITE));
4843
4844         g_object_class_install_property (object_class,
4845                                          PROP_HAS_SELECTION,
4846                                          g_param_spec_boolean ("has-selection",
4847                                                                "Has selection",
4848                                                                "The view has selections",
4849                                                                FALSE,
4850                                                                G_PARAM_READABLE));
4851
4852         binding_set = gtk_binding_set_by_class (class);
4853
4854         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4855         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4856         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4857         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4858         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4859         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4860         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4861         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4862         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4863                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4864         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4865                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4866         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4867                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4868         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4869                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4870
4871 }
4872
4873 static void
4874 ev_view_init (EvView *view)
4875 {
4876         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4877
4878         view->start_page = -1;
4879         view->end_page = -1;
4880         view->spacing = 5;
4881         view->scale = 1.0;
4882         view->current_page = 0;
4883         view->pressed_button = -1;
4884         view->cursor = EV_VIEW_CURSOR_NORMAL;
4885         view->drag_info.in_drag = FALSE;
4886         view->scroll_info.autoscrolling = FALSE;
4887         view->selection_info.selections = NULL;
4888         view->selection_info.in_selection = FALSE;
4889         view->selection_info.in_drag = FALSE;
4890         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4891         view->continuous = TRUE;
4892         view->dual_page = FALSE;
4893         view->presentation = FALSE;
4894         view->presentation_state = EV_PRESENTATION_NORMAL;
4895         view->fullscreen = FALSE;
4896         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4897         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4898         view->jump_to_find_result = TRUE;
4899         view->highlight_find_results = FALSE;
4900
4901         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4902         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4903 }
4904
4905 /*** Callbacks ***/
4906
4907 static void
4908 ev_view_change_page (EvView *view,
4909                      gint    new_page,
4910                      gboolean start_transition)
4911 {
4912         gint x, y;
4913
4914         view->current_page = new_page;
4915         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4916
4917         if (view->presentation && start_transition)
4918                 ev_view_presentation_transition_start (view);
4919
4920         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4921         ev_view_handle_cursor_over_xy (view, x, y);
4922
4923         gtk_widget_queue_resize (GTK_WIDGET (view));
4924 }
4925
4926 static void
4927 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4928                                      EvView                *view)
4929 {
4930         g_object_unref (view->animation);
4931         view->animation = NULL;
4932         ev_view_change_page (view, view->current_page, TRUE);
4933 }
4934
4935 /**
4936  * ev_view_transition_animation_cancel:
4937  * @animation: Animation to finish
4938  * @view: An EvView
4939  *
4940  * Does almost the same as cancel, but without scheduling the transition.
4941  */
4942
4943 static void
4944 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4945                                      EvView                *view)
4946 {
4947         g_object_unref (view->animation);
4948         view->animation = NULL;
4949         ev_view_change_page (view, view->current_page, FALSE);
4950 }
4951
4952 static void
4953 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4954                                     gdouble                progress,
4955                                     EvView                *view)
4956 {
4957         gtk_widget_queue_draw (GTK_WIDGET (view));
4958 }
4959
4960 static void
4961 ev_view_presentation_animation_start (EvView *view,
4962                                       int     new_page)
4963 {
4964         EvTransitionEffect *effect = NULL;
4965         cairo_surface_t *surface;
4966
4967         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4968                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4969                                                             view->current_page);
4970         if (!effect)
4971                 return;
4972
4973         view->animation = ev_transition_animation_new (effect);
4974
4975         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4976         ev_transition_animation_set_origin_surface (view->animation, surface);
4977         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, new_page);
4978         if (surface)
4979                 ev_transition_animation_set_dest_surface (view->animation, surface);
4980
4981         g_signal_connect (view->animation, "frame",
4982                           G_CALLBACK (ev_view_transition_animation_frame), view);
4983         g_signal_connect (view->animation, "finished",
4984                           G_CALLBACK (ev_view_transition_animation_finish), view);
4985 }
4986
4987 static void
4988 job_finished_cb (EvPixbufCache *pixbuf_cache,
4989                  GdkRegion     *region,
4990                  EvView        *view)
4991 {
4992         if (view->animation) {
4993                 cairo_surface_t *surface;
4994
4995                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4996                 ev_transition_animation_set_dest_surface (view->animation, surface);
4997         }
4998
4999         if (region) {
5000                 gdk_window_invalidate_region (view->layout.bin_window,
5001                                               region, TRUE);
5002         } else {
5003                 gtk_widget_queue_draw (GTK_WIDGET (view));
5004         }
5005 }
5006
5007 static void
5008 ev_view_page_changed_cb (EvDocumentModel *model,
5009                          gint             old_page,
5010                          gint             new_page,
5011                          EvView          *view)
5012 {
5013         if (!view->document)
5014                 return;
5015
5016         if (view->current_page != new_page) {
5017                 if (view->presentation)
5018                         ev_view_presentation_animation_start (view, new_page);
5019
5020                 ev_view_change_page (view, new_page, TRUE);
5021         } else {
5022                 gtk_widget_queue_draw (GTK_WIDGET (view));
5023         }
5024
5025         view->find_result = 0;
5026 }
5027
5028 static void
5029 on_adjustment_value_changed (GtkAdjustment *adjustment,
5030                              EvView        *view)
5031 {
5032         int dx = 0, dy = 0;
5033         gint x, y;
5034         GList *children, *l;
5035
5036         if (! GTK_WIDGET_REALIZED (view))
5037                 return;
5038
5039         if (view->hadjustment) {
5040                 dx = view->scroll_x - (int) view->hadjustment->value;
5041                 view->scroll_x = (int) view->hadjustment->value;
5042         } else {
5043                 view->scroll_x = 0;
5044         }
5045
5046         if (view->vadjustment) {
5047                 dy = view->scroll_y - (int) view->vadjustment->value;
5048                 view->scroll_y = (int) view->vadjustment->value;
5049         } else {
5050                 view->scroll_y = 0;
5051         }
5052
5053         children = gtk_container_get_children (GTK_CONTAINER (view));
5054         for (l = children; l && l->data; l = g_list_next (l)) {
5055                 gint       child_x, child_y;
5056                 GtkWidget *child = (GtkWidget *)l->data;
5057
5058                 gtk_container_child_get (GTK_CONTAINER (view),
5059                                          child,
5060                                          "x", &child_x,
5061                                          "y", &child_y,
5062                                          NULL);
5063                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
5064         }
5065         g_list_free (children);
5066
5067         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
5068                 EvViewWindowChild *child;
5069
5070                 child = (EvViewWindowChild *)l->data;
5071
5072                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
5073         }
5074
5075         if (view->pending_resize)
5076                 gtk_widget_queue_draw (GTK_WIDGET (view));
5077         else
5078                 gdk_window_scroll (view->layout.bin_window, dx, dy);
5079
5080         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5081         ev_view_handle_cursor_over_xy (view, x, y);
5082
5083         if (view->document)
5084                 view_update_range_and_current_page (view);
5085 }
5086
5087 GtkWidget*
5088 ev_view_new (void)
5089 {
5090         GtkWidget *view;
5091
5092         view = g_object_new (EV_TYPE_VIEW, NULL);
5093
5094         return view;
5095 }
5096
5097 static void
5098 setup_caches (EvView *view)
5099 {
5100         gboolean inverted_colors;
5101
5102         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
5103         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
5104         inverted_colors = ev_document_model_get_inverted_colors (view->model);
5105         ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
5106         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
5107 }
5108
5109 static void
5110 clear_caches (EvView *view)
5111 {
5112         if (view->pixbuf_cache) {
5113                 g_object_unref (view->pixbuf_cache);
5114                 view->pixbuf_cache = NULL;
5115         }
5116 }
5117
5118 void
5119 ev_view_set_loading (EvView       *view,
5120                      gboolean      loading)
5121 {
5122         view->loading = loading;
5123         gtk_widget_queue_draw (GTK_WIDGET (view));
5124 }
5125
5126 static gboolean
5127 ev_view_autoscroll_cb (EvView *view)
5128 {
5129         gdouble speed, value;
5130
5131         /* If the user stops autoscrolling, autoscrolling will be
5132          * set to false but the timeout will continue; stop the timeout: */
5133         if (!view->scroll_info.autoscrolling) {
5134                 view->scroll_info.timeout_id = 0;
5135                 return FALSE;
5136         }
5137
5138         if (view->scroll_info.last_y > view->scroll_info.start_y &&
5139                 (view->scroll_info.last_y < view->scroll_info.start_y))
5140                 return TRUE;
5141
5142         /* Replace 100 with your speed of choice: The lower the faster.
5143          * Replace 3 with another speed of choice: The higher, the faster it accelerated
5144          *      based on the distance of the starting point from the mouse
5145          * (All also effected by the timeout interval of this callback) */
5146
5147         if (view->scroll_info.start_y > view->scroll_info.last_y)
5148                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
5149         else
5150                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
5151
5152         value = gtk_adjustment_get_value (view->vadjustment);
5153         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
5154         gtk_adjustment_set_value (view->vadjustment, value);
5155
5156         return TRUE;
5157
5158 }
5159
5160 void
5161 ev_view_autoscroll_start (EvView *view)
5162 {
5163         gint x, y;
5164
5165         g_return_if_fail (EV_IS_VIEW (view));
5166
5167         if (view->scroll_info.autoscrolling)
5168                 return;
5169
5170         view->scroll_info.autoscrolling = TRUE;
5171         view->scroll_info.timeout_id =
5172                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5173                                view);
5174
5175         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5176         ev_view_handle_cursor_over_xy (view, x, y);
5177 }
5178
5179 void
5180 ev_view_autoscroll_stop (EvView *view)
5181 {
5182         gint x, y;
5183
5184         g_return_if_fail (EV_IS_VIEW (view));
5185
5186         if (!view->scroll_info.autoscrolling)
5187                 return;
5188
5189         view->scroll_info.autoscrolling = FALSE;
5190         if (view->scroll_info.timeout_id) {
5191                 g_source_remove (view->scroll_info.timeout_id);
5192                 view->scroll_info.timeout_id = 0;
5193         }
5194
5195         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5196         ev_view_handle_cursor_over_xy (view, x, y);
5197 }
5198
5199 static void
5200 ev_view_document_changed_cb (EvDocumentModel *model,
5201                              GParamSpec      *pspec,
5202                              EvView          *view)
5203 {
5204         EvDocument *document = ev_document_model_get_document (model);
5205
5206         view->loading = FALSE;
5207
5208         if (document != view->document) {
5209                 gint current_page;
5210
5211                 clear_caches (view);
5212
5213                 if (view->document) {
5214                         g_object_unref (view->document);
5215                 }
5216
5217                 view->document = document;
5218                 view->find_result = 0;
5219
5220                 if (view->document) {
5221                         g_object_ref (view->document);
5222                         setup_caches (view);
5223                 }
5224
5225                 current_page = ev_document_model_get_page (model);
5226                 if (view->current_page != current_page) {
5227                         ev_view_change_page (view, current_page, TRUE);
5228                 } else {
5229                         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
5230                         gtk_widget_queue_resize (GTK_WIDGET (view));
5231                 }
5232         }
5233 }
5234
5235 static void
5236 ev_view_rotation_changed_cb (EvDocumentModel *model,
5237                              GParamSpec      *pspec,
5238                              EvView          *view)
5239 {
5240         gint rotation = ev_document_model_get_rotation (model);
5241
5242         ev_view_set_rotation (view, rotation);
5243
5244         if (view->pixbuf_cache) {
5245                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5246                 if (!ev_document_is_page_size_uniform (view->document))
5247                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5248                 gtk_widget_queue_resize (GTK_WIDGET (view));
5249         }
5250
5251         ev_view_remove_all (view);
5252
5253         if (rotation != 0)
5254                 clear_selection (view);
5255 }
5256
5257 static void
5258 ev_view_inverted_colors_changed_cb (EvDocumentModel *model,
5259                                     GParamSpec      *pspec,
5260                                     EvView          *view)
5261 {
5262         if (view->pixbuf_cache) {
5263                 gboolean inverted_colors;
5264
5265                 inverted_colors = ev_document_model_get_inverted_colors (model);
5266                 ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
5267                 gtk_widget_queue_resize (GTK_WIDGET (view));
5268         }
5269 }
5270
5271 static void
5272 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
5273                                 GParamSpec      *pspec,
5274                                 EvView          *view)
5275 {
5276         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
5277
5278         ev_view_set_sizing_mode (view, mode);
5279
5280         if (mode != EV_SIZING_FREE)
5281                 gtk_widget_queue_resize (GTK_WIDGET (view));
5282 }
5283
5284 #define EPSILON 0.0000001
5285 static void
5286 ev_view_scale_changed_cb (EvDocumentModel *model,
5287                           GParamSpec      *pspec,
5288                           EvView          *view)
5289 {
5290         gdouble scale = ev_document_model_get_scale (model);
5291
5292         if (ABS (view->scale - scale) < EPSILON)
5293                 return;
5294
5295         if (view->loading_text) {
5296                 cairo_surface_destroy (view->loading_text);
5297                 view->loading_text = NULL;
5298         }
5299
5300         ev_view_set_zoom (view, scale);
5301
5302         view->pending_resize = TRUE;
5303         if (view->sizing_mode == EV_SIZING_FREE)
5304                 gtk_widget_queue_resize (GTK_WIDGET (view));
5305 }
5306
5307 static void
5308 ev_view_continuous_changed_cb (EvDocumentModel *model,
5309                                GParamSpec      *pspec,
5310                                EvView          *view)
5311 {
5312         gboolean continuous = ev_document_model_get_continuous (model);
5313
5314         ev_view_set_continuous (view, continuous);
5315         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5316         gtk_widget_queue_resize (GTK_WIDGET (view));
5317 }
5318
5319 static void
5320 ev_view_dual_page_changed_cb (EvDocumentModel *model,
5321                               GParamSpec      *pspec,
5322                               EvView          *view)
5323 {
5324         gboolean dual_page = ev_document_model_get_dual_page (model);
5325
5326         ev_view_set_dual_page (view, dual_page);
5327         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5328         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5329          * preload_cache_size to be 2 if dual_page is set.
5330          */
5331         gtk_widget_queue_resize (GTK_WIDGET (view));
5332 }
5333
5334 static void
5335 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
5336                                GParamSpec      *pspec,
5337                                EvView          *view)
5338 {
5339         gboolean fullscreen = ev_document_model_get_fullscreen (model);
5340
5341         ev_view_set_fullscreen (view, fullscreen);
5342         gtk_widget_queue_resize (GTK_WIDGET (view));
5343 }
5344
5345 void
5346 ev_view_set_model (EvView          *view,
5347                    EvDocumentModel *model)
5348 {
5349         g_return_if_fail (EV_IS_VIEW (view));
5350         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
5351
5352         if (model == view->model)
5353                 return;
5354
5355         if (view->model) {
5356                 g_signal_handlers_disconnect_by_func (view->model,
5357                                                       ev_view_document_changed_cb,
5358                                                       view);
5359                 g_signal_handlers_disconnect_by_func (view->model,
5360                                                       ev_view_page_changed_cb,
5361                                                       view);
5362                 g_object_unref (view->model);
5363         }
5364         view->model = g_object_ref (model);
5365         g_signal_connect (view->model, "notify::document",
5366                           G_CALLBACK (ev_view_document_changed_cb),
5367                           view);
5368         g_signal_connect (view->model, "notify::rotation",
5369                           G_CALLBACK (ev_view_rotation_changed_cb),
5370                           view);
5371         g_signal_connect (view->model, "notify::inverted-colors",
5372                           G_CALLBACK (ev_view_inverted_colors_changed_cb),
5373                           view);
5374         g_signal_connect (view->model, "notify::sizing-mode",
5375                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
5376                           view);
5377         g_signal_connect (view->model, "notify::scale",
5378                           G_CALLBACK (ev_view_scale_changed_cb),
5379                           view);
5380         g_signal_connect (view->model, "notify::continuous",
5381                           G_CALLBACK (ev_view_continuous_changed_cb),
5382                           view);
5383         g_signal_connect (view->model, "notify::dual-page",
5384                           G_CALLBACK (ev_view_dual_page_changed_cb),
5385                           view);
5386         g_signal_connect (view->model, "notify::fullscreen",
5387                           G_CALLBACK (ev_view_fullscreen_changed_cb),
5388                           view);
5389         g_signal_connect (view->model, "page-changed",
5390                           G_CALLBACK (ev_view_page_changed_cb),
5391                           view);
5392 }
5393
5394 static void
5395 ev_view_reload_page (EvView    *view,
5396                      gint       page,
5397                      GdkRegion *region)
5398 {
5399         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5400                                      region,
5401                                      page,
5402                                      view->rotation,
5403                                      view->scale);
5404 }
5405
5406 void
5407 ev_view_reload (EvView *view)
5408 {
5409         ev_pixbuf_cache_clear (view->pixbuf_cache);
5410         view_update_range_and_current_page (view);
5411 }
5412
5413 /*** Zoom and sizing mode ***/
5414
5415 void
5416 ev_view_set_zoom (EvView   *view,
5417                   double    scale)
5418 {
5419         view->scale = scale;
5420
5421         g_object_notify (G_OBJECT (view), "zoom");
5422 }
5423
5424 double
5425 ev_view_get_zoom (EvView *view)
5426 {
5427         return view->scale;
5428 }
5429
5430 gboolean
5431 ev_view_get_continuous (EvView *view)
5432 {
5433         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5434
5435         return view->continuous;
5436 }
5437
5438 void
5439 ev_view_set_continuous (EvView   *view,
5440                         gboolean  continuous)
5441 {
5442         g_return_if_fail (EV_IS_VIEW (view));
5443
5444         view->continuous = continuous;
5445
5446         g_object_notify (G_OBJECT (view), "continuous");
5447 }
5448
5449 gboolean
5450 ev_view_get_dual_page (EvView *view)
5451 {
5452         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5453
5454         return view->dual_page;
5455 }
5456
5457 void
5458 ev_view_set_dual_page (EvView   *view,
5459                        gboolean  dual_page)
5460 {
5461         g_return_if_fail (EV_IS_VIEW (view));
5462
5463         view->dual_page = dual_page;
5464
5465         g_object_notify (G_OBJECT (view), "dual-page");
5466 }
5467
5468 void
5469 ev_view_set_fullscreen (EvView   *view,
5470                          gboolean  fullscreen)
5471 {
5472         g_return_if_fail (EV_IS_VIEW (view));
5473
5474         view->fullscreen = fullscreen;
5475
5476         g_object_notify (G_OBJECT (view), "fullscreen");
5477 }
5478
5479 gboolean
5480 ev_view_get_fullscreen (EvView *view)
5481 {
5482         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5483
5484         return view->fullscreen;
5485 }
5486
5487 void
5488 ev_view_set_presentation (EvView   *view,
5489                           gboolean  presentation)
5490 {
5491         g_return_if_fail (EV_IS_VIEW (view));
5492
5493         presentation = presentation != FALSE;
5494
5495         if (view->presentation == presentation)
5496                 return;
5497
5498         if (!presentation)
5499                 view->presentation_state = EV_PRESENTATION_NORMAL;
5500
5501         view->presentation = presentation;
5502         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5503
5504         if (presentation) {
5505                 view->sizing_mode_saved = view->sizing_mode;
5506                 view->scale_saved = view->scale;
5507                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
5508         } else {
5509                 ev_document_model_set_sizing_mode (view->model, view->sizing_mode_saved);
5510                 ev_document_model_set_scale (view->model, view->scale_saved);
5511         }
5512
5513         gtk_widget_queue_resize (GTK_WIDGET (view));
5514
5515         if (presentation)
5516                 ev_view_presentation_transition_start (view);
5517         else {
5518                 ev_view_presentation_transition_stop (view);
5519
5520                 if (view->animation) {
5521                         /* stop any running animation */
5522                         ev_view_transition_animation_cancel (view->animation, view);
5523                 }
5524         }
5525
5526         if (GTK_WIDGET_REALIZED (view)) {
5527                 if (view->presentation)
5528                         gdk_window_set_background (view->layout.bin_window,
5529                                                    &GTK_WIDGET (view)->style->black);
5530                 else
5531                         gdk_window_set_background (view->layout.bin_window,
5532                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
5533         }
5534
5535         g_object_notify (G_OBJECT (view), "presentation");
5536 }
5537
5538 gboolean
5539 ev_view_get_presentation (EvView *view)
5540 {
5541         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5542
5543         return view->presentation;
5544 }
5545
5546 static gboolean
5547 transition_next_page (EvView *view)
5548 {
5549         ev_view_next_page (view);
5550
5551         return FALSE;
5552 }
5553
5554 static void
5555 ev_view_presentation_transition_stop (EvView *view)
5556 {
5557         if (view->trans_timeout_id > 0)
5558                 g_source_remove (view->trans_timeout_id);
5559         view->trans_timeout_id = 0;
5560 }
5561
5562 static void
5563 ev_view_presentation_transition_start (EvView *view)
5564 {
5565         gdouble duration;
5566
5567         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
5568                 return;
5569
5570         ev_view_presentation_transition_stop (view);
5571
5572         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
5573                                                              view->current_page);
5574         if (duration > 0) {
5575                 view->trans_timeout_id =
5576                         g_timeout_add_seconds (duration,
5577                                                (GSourceFunc) transition_next_page,
5578                                                view);
5579         }
5580 }
5581
5582 void
5583 ev_view_set_sizing_mode (EvView       *view,
5584                          EvSizingMode  sizing_mode)
5585 {
5586         view->sizing_mode = sizing_mode;
5587
5588         g_object_notify (G_OBJECT (view), "sizing-mode");
5589 }
5590
5591 EvSizingMode
5592 ev_view_get_sizing_mode (EvView *view)
5593 {
5594         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
5595
5596         return view->sizing_mode;
5597 }
5598
5599 gboolean
5600 ev_view_can_zoom_in (EvView *view)
5601 {
5602         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
5603 }
5604
5605 gboolean
5606 ev_view_can_zoom_out (EvView *view)
5607 {
5608         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
5609 }
5610
5611 void
5612 ev_view_zoom_in (EvView *view)
5613 {
5614         gdouble scale;
5615
5616         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5617
5618         if (view->presentation)
5619                 return;
5620
5621         view->pending_scroll = SCROLL_TO_CENTER;
5622         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
5623         ev_document_model_set_scale (view->model, scale);
5624 }
5625
5626 void
5627 ev_view_zoom_out (EvView *view)
5628 {
5629         gdouble scale;
5630
5631         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5632
5633         if (view->presentation)
5634                 return;
5635
5636         view->pending_scroll = SCROLL_TO_CENTER;
5637         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5638         ev_document_model_set_scale (view->model, scale);
5639 }
5640
5641 void
5642 ev_view_set_rotation (EvView *view, int rotation)
5643 {
5644         view->rotation = rotation;
5645
5646         g_object_notify (G_OBJECT (view), "rotation");
5647 }
5648
5649 int
5650 ev_view_get_rotation (EvView *view)
5651 {
5652         return view->rotation;
5653 }
5654
5655 static double
5656 zoom_for_size_fit_width (gdouble doc_width,
5657                          gdouble doc_height,
5658                          int     target_width,
5659                          int     target_height)
5660 {
5661         double scale;
5662
5663         scale = (double)target_width / doc_width;
5664
5665         if (doc_height * scale > target_height)
5666                 scale = (double)target_width / doc_width;
5667
5668         return scale;
5669 }
5670
5671 static double
5672 zoom_for_size_fit_height (gdouble doc_width,
5673                           gdouble doc_height,
5674                           int     target_width,
5675                           int     target_height)
5676 {
5677         double scale;
5678
5679         scale = (double)target_height / doc_height;
5680
5681         if (doc_width * scale > target_width)
5682                 scale = (double)target_height / doc_height;
5683
5684         return scale;
5685 }
5686
5687 static double
5688 zoom_for_size_best_fit (gdouble doc_width,
5689                         gdouble doc_height,
5690                         int     target_width,
5691                         int     target_height)
5692 {
5693         double w_scale;
5694         double h_scale;
5695
5696         w_scale = (double)target_width / doc_width;
5697         h_scale = (double)target_height / doc_height;
5698
5699         if (doc_height * w_scale > target_height)
5700                 w_scale = (double)target_width / doc_width;
5701         if (doc_width * h_scale > target_width)
5702                 h_scale = (double)target_height / doc_height;
5703
5704         return MIN (w_scale, h_scale);
5705 }
5706
5707
5708 static void
5709 ev_view_zoom_for_size_presentation (EvView *view,
5710                                     int     width,
5711                                     int     height)
5712 {
5713         gdouble doc_width, doc_height;
5714         gdouble scale;
5715
5716         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5717         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5718         ev_document_model_set_scale (view->model, scale);
5719 }
5720
5721 static void
5722 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5723                                                 int     width,
5724                                                 int     height)
5725 {
5726         gdouble doc_width, doc_height;
5727         GtkBorder border;
5728         gdouble scale;
5729
5730         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5731         if (view->rotation == 90 || view->rotation == 270) {
5732                 gdouble tmp;
5733
5734                 tmp = doc_width;
5735                 doc_width = doc_height;
5736                 doc_height = tmp;
5737         }
5738
5739         compute_border (view, doc_width, doc_height, &border);
5740
5741         doc_width *= 2;
5742         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5743         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5744
5745         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5746                 gint sb_size;
5747
5748                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5749                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5750         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5751                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5752         else
5753                 g_assert_not_reached ();
5754
5755         ev_document_model_set_scale (view->model, scale);
5756 }
5757
5758 static void
5759 ev_view_zoom_for_size_continuous (EvView *view,
5760                                   int     width,
5761                                   int     height)
5762 {
5763         gdouble doc_width, doc_height;
5764         GtkBorder border;
5765         gdouble scale;
5766
5767         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5768         if (view->rotation == 90 || view->rotation == 270) {
5769                 gdouble tmp;
5770
5771                 tmp = doc_width;
5772                 doc_width = doc_height;
5773                 doc_height = tmp;
5774         }
5775
5776         compute_border (view, doc_width, doc_height, &border);
5777
5778         width -= (border.left + border.right + 2 * view->spacing);
5779         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5780
5781         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5782                 gint sb_size;
5783
5784                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5785                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5786         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5787                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5788         else
5789                 g_assert_not_reached ();
5790
5791         ev_document_model_set_scale (view->model, scale);
5792 }
5793
5794 static void
5795 ev_view_zoom_for_size_dual_page (EvView *view,
5796                                  int     width,
5797                                  int     height)
5798 {
5799         GtkBorder border;
5800         gdouble doc_width, doc_height;
5801         gdouble scale;
5802         gint other_page;
5803
5804         other_page = view->current_page ^ 1;
5805
5806         /* Find the largest of the two. */
5807         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5808         if (other_page < ev_document_get_n_pages (view->document)) {
5809                 gdouble width_2, height_2;
5810
5811                 get_doc_page_size (view, other_page, &width_2, &height_2);
5812                 if (width_2 > doc_width)
5813                         doc_width = width_2;
5814                 if (height_2 > doc_height)
5815                         doc_height = height_2;
5816         }
5817         compute_border (view, width, height, &border);
5818
5819         doc_width = doc_width * 2;
5820         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5821         height -= (border.top + border.bottom + 2 * view->spacing);
5822
5823         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5824                 gint sb_size;
5825
5826                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5827                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5828         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5829                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5830         else
5831                 g_assert_not_reached ();
5832
5833         ev_document_model_set_scale (view->model, scale);
5834 }
5835
5836 static void
5837 ev_view_zoom_for_size_single_page (EvView *view,
5838                                    int     width,
5839                                    int     height)
5840 {
5841         gdouble doc_width, doc_height;
5842         GtkBorder border;
5843         gdouble scale;
5844
5845         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5846
5847         /* Get an approximate border */
5848         compute_border (view, width, height, &border);
5849
5850         width -= (border.left + border.right + 2 * view->spacing);
5851         height -= (border.top + border.bottom + 2 * view->spacing);
5852
5853         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5854                 gint sb_size;
5855
5856                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5857                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5858         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5859                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5860         else
5861                 g_assert_not_reached ();
5862
5863         ev_document_model_set_scale (view->model, scale);
5864 }
5865
5866 static void
5867 ev_view_zoom_for_size (EvView *view,
5868                        int     width,
5869                        int     height)
5870 {
5871         g_return_if_fail (EV_IS_VIEW (view));
5872         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5873                           view->sizing_mode == EV_SIZING_BEST_FIT);
5874         g_return_if_fail (width >= 0);
5875         g_return_if_fail (height >= 0);
5876
5877         if (view->document == NULL)
5878                 return;
5879
5880         if (view->presentation)
5881                 ev_view_zoom_for_size_presentation (view, width, height);
5882         else if (view->continuous && view->dual_page)
5883                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5884         else if (view->continuous)
5885                 ev_view_zoom_for_size_continuous (view, width, height);
5886         else if (view->dual_page)
5887                 ev_view_zoom_for_size_dual_page (view, width, height);
5888         else
5889                 ev_view_zoom_for_size_single_page (view, width, height);
5890 }
5891
5892 /*** Find ***/
5893 static gint
5894 ev_view_find_get_n_results (EvView *view, gint page)
5895 {
5896         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5897 }
5898
5899 static EvRectangle *
5900 ev_view_find_get_result (EvView *view, gint page, gint result)
5901 {
5902         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5903 }
5904
5905 static void
5906 jump_to_find_result (EvView *view)
5907 {
5908         gint n_results;
5909         gint page = view->current_page;
5910
5911         n_results = ev_view_find_get_n_results (view, page);
5912
5913         if (n_results > 0 && view->find_result < n_results) {
5914                 EvRectangle *rect;
5915                 GdkRectangle view_rect;
5916
5917                 rect = ev_view_find_get_result (view, page, view->find_result);
5918                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5919                 ensure_rectangle_is_visible (view, &view_rect);
5920                 view->jump_to_find_result = FALSE;
5921         }
5922 }
5923
5924 /**
5925  * jump_to_find_page
5926  * @view: #EvView instance
5927  * @direction: Direction to look
5928  * @shift: Shift from current page
5929  *
5930  * Jumps to the first page that has occurences of searched word.
5931  * Uses a direction where to look and a shift from current page.
5932  *
5933  */
5934 static void
5935 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5936 {
5937         int n_pages, i;
5938
5939         n_pages = ev_document_get_n_pages (view->document);
5940
5941         for (i = 0; i < n_pages; i++) {
5942                 int page;
5943
5944                 if (direction == EV_VIEW_FIND_NEXT)
5945                         page = view->current_page + i;
5946                 else
5947                         page = view->current_page - i;
5948                 page += shift;
5949
5950                 if (page >= n_pages) {
5951                         page = page - n_pages;
5952                 } else if (page < 0)
5953                         page = page + n_pages;
5954
5955                 if (ev_view_find_get_n_results (view, page) > 0) {
5956                         ev_document_model_set_page (view->model, page);
5957                         break;
5958                 }
5959         }
5960 }
5961
5962 void
5963 ev_view_find_changed (EvView *view, GList **results, gint page)
5964 {
5965         view->find_pages = results;
5966
5967         if (view->jump_to_find_result == TRUE) {
5968                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5969                 jump_to_find_result (view);
5970         }
5971
5972         if (view->current_page == page)
5973                 gtk_widget_queue_draw (GTK_WIDGET (view));
5974 }
5975
5976 void
5977 ev_view_find_next (EvView *view)
5978 {
5979         gint n_results;
5980
5981         n_results = ev_view_find_get_n_results (view, view->current_page);
5982         view->find_result++;
5983
5984         if (view->find_result >= n_results) {
5985                 view->find_result = 0;
5986                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5987                 jump_to_find_result (view);
5988         } else {
5989                 jump_to_find_result (view);
5990                 gtk_widget_queue_draw (GTK_WIDGET (view));
5991         }
5992 }
5993
5994 void
5995 ev_view_find_previous (EvView *view)
5996 {
5997         view->find_result--;
5998
5999         if (view->find_result < 0) {
6000                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
6001                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
6002                 jump_to_find_result (view);
6003         } else {
6004                 jump_to_find_result (view);
6005                 gtk_widget_queue_draw (GTK_WIDGET (view));
6006         }
6007 }
6008
6009 void
6010 ev_view_find_search_changed (EvView *view)
6011 {
6012         /* search string has changed, focus on new search result */
6013         view->jump_to_find_result = TRUE;
6014         view->find_pages = NULL;
6015 }
6016
6017 void
6018 ev_view_find_set_highlight_search (EvView *view, gboolean value)
6019 {
6020         view->highlight_find_results = value;
6021         gtk_widget_queue_draw (GTK_WIDGET (view));
6022 }
6023
6024 void
6025 ev_view_find_cancel (EvView *view)
6026 {
6027         view->find_pages = NULL;
6028 }
6029
6030 /*** Selections ***/
6031
6032 /* compute_new_selection_rect/text calculates the area currently selected by
6033  * view_rect.  each handles a different mode;
6034  */
6035 static GList *
6036 compute_new_selection_rect (EvView       *view,
6037                             GdkPoint     *start,
6038                             GdkPoint     *stop)
6039 {
6040         GdkRectangle view_rect;
6041         int n_pages, i;
6042         GList *list = NULL;
6043
6044         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
6045
6046         view_rect.x = MIN (start->x, stop->x);
6047         view_rect.y = MIN (start->y, stop->y);
6048         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
6049         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
6050
6051         n_pages = ev_document_get_n_pages (view->document);
6052
6053         for (i = 0; i < n_pages; i++) {
6054                 GdkRectangle page_area;
6055                 GtkBorder border;
6056
6057                 if (get_page_extents (view, i, &page_area, &border)) {
6058                         GdkRectangle overlap;
6059
6060                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
6061                                 EvViewSelection *selection;
6062
6063                                 selection = g_new0 (EvViewSelection, 1);
6064                                 selection->page = i;
6065                                 view_rect_to_doc_rect (view, &overlap, &page_area,
6066                                                        &(selection->rect));
6067
6068                                 list = g_list_append (list, selection);
6069                         }
6070                 }
6071         }
6072
6073         return list;
6074 }
6075
6076 static gboolean
6077 gdk_rectangle_point_in (GdkRectangle *rectangle,
6078                         GdkPoint     *point)
6079 {
6080         return rectangle->x <= point->x &&
6081                 rectangle->y <= point->y &&
6082                 point->x < rectangle->x + rectangle->width &&
6083                 point->y < rectangle->y + rectangle->height;
6084 }
6085
6086 static GList *
6087 compute_new_selection_text (EvView          *view,
6088                             EvSelectionStyle style,
6089                             GdkPoint        *start,
6090                             GdkPoint        *stop)
6091 {
6092         int n_pages, i, first, last;
6093         GList *list = NULL;
6094         EvViewSelection *selection;
6095         gdouble width, height;
6096         int start_page, end_page;
6097
6098         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
6099
6100         n_pages = ev_document_get_n_pages (view->document);
6101
6102         /* First figure out the range of pages the selection
6103          * affects. */
6104         first = n_pages;
6105         last = 0;
6106         if (view->continuous) {
6107                 start_page = 0;
6108                 end_page = n_pages;
6109         } else if (view->dual_page) {
6110                 start_page = view->start_page;
6111                 end_page = view->end_page + 1;
6112         } else {
6113                 start_page = view->current_page;
6114                 end_page = view->current_page + 1;
6115         }
6116
6117         for (i = start_page; i < end_page; i++) {
6118                 GdkRectangle page_area;
6119                 GtkBorder border;
6120
6121                 get_page_extents (view, i, &page_area, &border);
6122                 if (gdk_rectangle_point_in (&page_area, start) ||
6123                     gdk_rectangle_point_in (&page_area, stop)) {
6124                         if (first == n_pages)
6125                                 first = i;
6126                         last = i;
6127                 }
6128
6129         }
6130
6131         /* Now create a list of EvViewSelection's for the affected
6132          * pages.  This could be an empty list, a list of just one
6133          * page or a number of pages.*/
6134         for (i = first; i < last + 1; i++) {
6135                 GdkRectangle page_area;
6136                 GtkBorder border;
6137                 GdkPoint *point;
6138
6139                 get_doc_page_size (view, i, &width, &height);
6140
6141                 selection = g_new0 (EvViewSelection, 1);
6142                 selection->page = i;
6143                 selection->style = style;
6144                 selection->rect.x1 = selection->rect.y1 = 0;
6145                 selection->rect.x2 = width;
6146                 selection->rect.y2 = height;
6147
6148                 get_page_extents (view, i, &page_area, &border);
6149
6150                 if (gdk_rectangle_point_in (&page_area, start))
6151                         point = start;
6152                 else
6153                         point = stop;
6154
6155                 if (i == first)
6156                         view_point_to_doc_point (view, point, &page_area,
6157                                                  &selection->rect.x1,
6158                                                  &selection->rect.y1);
6159
6160                 /* If the selection is contained within just one page,
6161                  * make sure we don't write 'start' into both points
6162                  * in selection->rect. */
6163                 if (first == last)
6164                         point = stop;
6165
6166                 if (i == last)
6167                         view_point_to_doc_point (view, point, &page_area,
6168                                                  &selection->rect.x2,
6169                                                  &selection->rect.y2);
6170
6171                 list = g_list_append (list, selection);
6172         }
6173
6174         return list;
6175 }
6176
6177 /* This function takes the newly calculated list, and figures out which regions
6178  * have changed.  It then queues a redraw approporiately.
6179  */
6180 static void
6181 merge_selection_region (EvView *view,
6182                         GList  *new_list)
6183 {
6184         GList *old_list;
6185         GList *new_list_ptr, *old_list_ptr;
6186
6187         /* Update the selection */
6188         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
6189         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6190         g_list_free (view->selection_info.selections);
6191         view->selection_info.selections = new_list;
6192         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
6193         g_object_notify (G_OBJECT (view), "has-selection");
6194
6195         new_list_ptr = new_list;
6196         old_list_ptr = old_list;
6197
6198         while (new_list_ptr || old_list_ptr) {
6199                 EvViewSelection *old_sel, *new_sel;
6200                 int cur_page;
6201                 GdkRegion *region = NULL;
6202
6203                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
6204                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
6205
6206                 /* Assume that the lists are in order, and we run through them
6207                  * comparing them, one page at a time.  We come out with the
6208                  * first page we see. */
6209                 if (new_sel && old_sel) {
6210                         if (new_sel->page < old_sel->page) {
6211                                 new_list_ptr = new_list_ptr->next;
6212                                 old_sel = NULL;
6213                         } else if (new_sel->page > old_sel->page) {
6214                                 old_list_ptr = old_list_ptr->next;
6215                                 new_sel = NULL;
6216                         } else {
6217                                 new_list_ptr = new_list_ptr->next;
6218                                 old_list_ptr = old_list_ptr->next;
6219                         }
6220                 } else if (new_sel) {
6221                         new_list_ptr = new_list_ptr->next;
6222                 } else if (old_sel) {
6223                         old_list_ptr = old_list_ptr->next;
6224                 }
6225
6226                 g_assert (new_sel || old_sel);
6227
6228                 /* is the page we're looking at on the screen?*/
6229                 cur_page = new_sel ? new_sel->page : old_sel->page;
6230                 if (cur_page < view->start_page || cur_page > view->end_page)
6231                         continue;
6232
6233                 /* seed the cache with a new page.  We are going to need the new
6234                  * region too. */
6235                 if (new_sel) {
6236                         GdkRegion *tmp_region = NULL;
6237
6238                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
6239                                                                cur_page,
6240                                                                view->scale,
6241                                                                &tmp_region);
6242
6243                         if (tmp_region) {
6244                                 new_sel->covered_region = gdk_region_copy (tmp_region);
6245                         }
6246                 }
6247
6248                 /* Now we figure out what needs redrawing */
6249                 if (old_sel && new_sel) {
6250                         if (old_sel->covered_region && new_sel->covered_region) {
6251                                 /* We only want to redraw the areas that have
6252                                  * changed, so we xor the old and new regions
6253                                  * and redraw if it's different */
6254                                 region = gdk_region_copy (old_sel->covered_region);
6255                                 gdk_region_xor (region, new_sel->covered_region);
6256                                 if (gdk_region_empty (region)) {
6257                                         gdk_region_destroy (region);
6258                                         region = NULL;
6259                                 }
6260                         } else if (old_sel->covered_region) {
6261                                 region = gdk_region_copy (old_sel->covered_region);
6262                         } else if (new_sel->covered_region) {
6263                                 region = gdk_region_copy (new_sel->covered_region);
6264                         }
6265                 } else if (old_sel && !new_sel) {
6266                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
6267                                 region = gdk_region_copy (old_sel->covered_region);
6268                         }
6269                 } else if (!old_sel && new_sel) {
6270                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
6271                                 region = gdk_region_copy (new_sel->covered_region);
6272                         }
6273                 } else {
6274                         g_assert_not_reached ();
6275                 }
6276
6277                 /* Redraw the damaged region! */
6278                 if (region) {
6279                         GdkRectangle page_area;
6280                         GtkBorder border;
6281
6282                         /* I don't know why but the region is smaller
6283                          * than expected. This hack fixes it, I guess
6284                          * 10 pixels more won't hurt
6285                          */
6286                         gdk_region_shrink (region, -5, -5);
6287
6288                         get_page_extents (view, cur_page, &page_area, &border);
6289                         gdk_region_offset (region,
6290                                            page_area.x + border.left - view->scroll_x,
6291                                            page_area.y + border.top - view->scroll_y);
6292                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
6293                         gdk_region_destroy (region);
6294                 }
6295         }
6296
6297         /* Free the old list, now that we're done with it. */
6298         g_list_foreach (old_list, (GFunc) selection_free, NULL);
6299         g_list_free (old_list);
6300 }
6301
6302 static void
6303 compute_selections (EvView          *view,
6304                     EvSelectionStyle style,
6305                     GdkPoint        *start,
6306                     GdkPoint        *stop)
6307 {
6308         GList *list;
6309
6310         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
6311                 list = compute_new_selection_rect (view, start, stop);
6312         else
6313                 list = compute_new_selection_text (view, style, start, stop);
6314         merge_selection_region (view, list);
6315 }
6316
6317 /* Free's the selection.  It's up to the caller to queue redraws if needed.
6318  */
6319 static void
6320 selection_free (EvViewSelection *selection)
6321 {
6322         if (selection->covered_region)
6323                 gdk_region_destroy (selection->covered_region);
6324         g_free (selection);
6325 }
6326
6327 static void
6328 clear_selection (EvView *view)
6329 {
6330         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6331         g_list_free (view->selection_info.selections);
6332         view->selection_info.selections = NULL;
6333         view->selection_info.in_selection = FALSE;
6334         if (view->pixbuf_cache)
6335                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6336         g_object_notify (G_OBJECT (view), "has-selection");
6337 }
6338
6339 void
6340 ev_view_select_all (EvView *view)
6341 {
6342         GList *selections = NULL;
6343         int n_pages, i;
6344
6345         /* Disable selection on rotated pages for the 0.4.0 series */
6346         if (view->rotation != 0)
6347                 return;
6348
6349         clear_selection (view);
6350
6351         n_pages = ev_document_get_n_pages (view->document);
6352         for (i = 0; i < n_pages; i++) {
6353                 gdouble width, height;
6354                 EvViewSelection *selection;
6355
6356                 get_doc_page_size (view, i, &width, &height);
6357
6358                 selection = g_new0 (EvViewSelection, 1);
6359                 selection->page = i;
6360                 selection->style = EV_SELECTION_STYLE_GLYPH;
6361                 selection->rect.x1 = selection->rect.y1 = 0;
6362                 selection->rect.x2 = width;
6363                 selection->rect.y2 = height;
6364
6365                 selections = g_list_append (selections, selection);
6366         }
6367
6368         merge_selection_region (view, selections);
6369         gtk_widget_queue_draw (GTK_WIDGET (view));
6370 }
6371
6372 gboolean
6373 ev_view_get_has_selection (EvView *view)
6374 {
6375         return view->selection_info.selections != NULL;
6376 }
6377
6378 static char *
6379 get_selected_text (EvView *view)
6380 {
6381         GString *text;
6382         GList *l;
6383         gchar *normalized_text;
6384         EvRenderContext *rc;
6385
6386         text = g_string_new (NULL);
6387         rc = ev_render_context_new (NULL, view->rotation, view->scale);
6388
6389         ev_document_doc_mutex_lock ();
6390
6391         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6392                 EvViewSelection *selection = (EvViewSelection *)l->data;
6393                 EvPage *page;
6394                 gchar *tmp;
6395
6396                 page = ev_document_get_page (view->document, selection->page);
6397                 ev_render_context_set_page (rc, page);
6398                 g_object_unref (page);
6399
6400                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6401                                                       rc, selection->style,
6402                                                       &(selection->rect));
6403
6404                 g_string_append (text, tmp);
6405                 g_free (tmp);
6406         }
6407
6408         g_object_unref (rc);
6409
6410         ev_document_doc_mutex_unlock ();
6411
6412         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6413         g_string_free (text, TRUE);
6414         return normalized_text;
6415 }
6416
6417 static void
6418 ev_view_clipboard_copy (EvView      *view,
6419                         const gchar *text)
6420 {
6421         GtkClipboard *clipboard;
6422
6423         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6424                                               GDK_SELECTION_CLIPBOARD);
6425         gtk_clipboard_set_text (clipboard, text, -1);
6426 }
6427
6428 void
6429 ev_view_copy (EvView *ev_view)
6430 {
6431         char *text;
6432
6433         if (!EV_IS_SELECTION (ev_view->document))
6434                 return;
6435
6436         text = get_selected_text (ev_view);
6437         ev_view_clipboard_copy (ev_view, text);
6438         g_free (text);
6439 }
6440
6441 static void
6442 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6443                         GtkSelectionData *selection_data,
6444                         guint             info,
6445                         gpointer          data)
6446 {
6447         EvView *ev_view = EV_VIEW (data);
6448
6449         if (ev_view->link_selected) {
6450                 gtk_selection_data_set_text (selection_data,
6451                                              ev_link_action_get_uri (ev_view->link_selected),
6452                                              -1);
6453         } else if (EV_IS_SELECTION (ev_view->document) &&
6454                    ev_view->selection_info.selections) {
6455                 gchar *text;
6456
6457                 text = get_selected_text (ev_view);
6458                 if (text) {
6459                         gtk_selection_data_set_text (selection_data, text, -1);
6460                         g_free (text);
6461                 }
6462         }
6463 }
6464
6465 static void
6466 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6467                           gpointer      data)
6468 {
6469         EvView *view = EV_VIEW (data);
6470
6471         clear_selection (view);
6472         clear_link_selected (view);
6473 }
6474
6475 static void
6476 ev_view_update_primary_selection (EvView *ev_view)
6477 {
6478         GtkClipboard *clipboard;
6479
6480         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6481                                               GDK_SELECTION_PRIMARY);
6482
6483         if (ev_view->selection_info.selections || ev_view->link_selected) {
6484                 GtkTargetList *target_list;
6485                 GtkTargetEntry *targets;
6486                 int n_targets;
6487
6488                 target_list = gtk_target_list_new (NULL, 0);
6489                 gtk_target_list_add_text_targets (target_list, 0);
6490                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6491                 gtk_target_list_unref (target_list);
6492
6493                 if (!gtk_clipboard_set_with_owner (clipboard,
6494                                                    targets, n_targets,
6495                                                    ev_view_primary_get_cb,
6496                                                    ev_view_primary_clear_cb,
6497                                                    G_OBJECT (ev_view)))
6498                         ev_view_primary_clear_cb (clipboard, ev_view);
6499
6500                 gtk_target_table_free (targets, n_targets);
6501         } else {
6502                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6503                         gtk_clipboard_clear (clipboard);
6504         }
6505 }
6506
6507 static void
6508 clear_link_selected (EvView *view)
6509 {
6510         if (view->link_selected) {
6511                 g_object_unref (view->link_selected);
6512                 view->link_selected = NULL;
6513         }
6514 }
6515
6516 void
6517 ev_view_copy_link_address (EvView       *view,
6518                            EvLinkAction *action)
6519 {
6520         clear_link_selected (view);
6521
6522         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6523
6524         view->link_selected = g_object_ref (action);
6525         ev_view_update_primary_selection (view);
6526 }
6527
6528 /*** Cursor operations ***/
6529
6530 static GdkCursor *
6531 ev_view_create_invisible_cursor(void)
6532 {
6533        GdkBitmap *empty;
6534        GdkColor black = { 0, 0, 0, 0 };
6535        static char bits[] = { 0x00 };
6536
6537        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
6538
6539        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
6540 }
6541
6542 static void
6543 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6544 {
6545         GdkCursor *cursor = NULL;
6546         GdkDisplay *display;
6547         GtkWidget *widget;
6548
6549         if (view->cursor == new_cursor) {
6550                 return;
6551         }
6552
6553         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6554         display = gtk_widget_get_display (widget);
6555         view->cursor = new_cursor;
6556
6557         switch (new_cursor) {
6558                 case EV_VIEW_CURSOR_NORMAL:
6559                         gdk_window_set_cursor (view->layout.bin_window, NULL);
6560                         break;
6561                 case EV_VIEW_CURSOR_IBEAM:
6562                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
6563                         break;
6564                 case EV_VIEW_CURSOR_LINK:
6565                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
6566                         break;
6567                 case EV_VIEW_CURSOR_WAIT:
6568                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
6569                         break;
6570                 case EV_VIEW_CURSOR_HIDDEN:
6571                         cursor = ev_view_create_invisible_cursor ();
6572                         break;
6573                 case EV_VIEW_CURSOR_DRAG:
6574                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
6575                         break;
6576                 case EV_VIEW_CURSOR_AUTOSCROLL:
6577                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
6578                         break;
6579         }
6580
6581         if (cursor) {
6582                 gdk_window_set_cursor (view->layout.bin_window, cursor);
6583                 gdk_cursor_unref (cursor);
6584                 gdk_flush();
6585         }
6586 }
6587
6588 void
6589 ev_view_hide_cursor (EvView *view)
6590 {
6591        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6592 }
6593
6594 void
6595 ev_view_show_cursor (EvView *view)
6596 {
6597        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6598 }
6599
6600 static void
6601 ev_view_reset_presentation_state (EvView *view)
6602 {
6603         if (!view->presentation ||
6604             view->presentation_state == EV_PRESENTATION_NORMAL)
6605                 return;
6606
6607         view->presentation_state = EV_PRESENTATION_NORMAL;
6608         gdk_window_set_background (view->layout.bin_window,
6609                                    &GTK_WIDGET (view)->style->black);
6610         gtk_widget_queue_draw (GTK_WIDGET (view));
6611 }
6612
6613 gboolean
6614 ev_view_next_page (EvView *view)
6615 {
6616         int page, n_pages;
6617
6618         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6619
6620         if (!view->document)
6621                 return FALSE;
6622
6623         if (view->presentation &&
6624             (view->presentation_state == EV_PRESENTATION_BLACK ||
6625              view->presentation_state == EV_PRESENTATION_WHITE)) {
6626                 ev_view_reset_presentation_state (view);
6627                 return FALSE;
6628         }
6629
6630         if (view->animation) {
6631                 ev_view_transition_animation_cancel (view->animation, view);
6632         }
6633
6634         ev_view_presentation_transition_stop (view);
6635         ev_view_reset_presentation_state (view);
6636
6637         page = ev_document_model_get_page (view->model);
6638         n_pages = ev_document_get_n_pages (view->document);
6639
6640         if (view->dual_page && !view->presentation)
6641                 page = page + 2;
6642         else
6643                 page = page + 1;
6644
6645         if (page < n_pages) {
6646                 ev_document_model_set_page (view->model, page);
6647                 return TRUE;
6648         } else if (view->presentation && page == n_pages) {
6649                 view->presentation_state = EV_PRESENTATION_END;
6650                 gtk_widget_queue_draw (GTK_WIDGET (view));
6651                 return TRUE;
6652         } else if (view->dual_page && page == n_pages) {
6653                 ev_document_model_set_page (view->model, page - 1);
6654                 return TRUE;
6655         } else {
6656                 return FALSE;
6657         }
6658 }
6659
6660 gboolean
6661 ev_view_previous_page (EvView *view)
6662 {
6663         int page;
6664
6665         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6666
6667         if (!view->document)
6668                 return FALSE;
6669
6670         if (view->presentation &&
6671             view->presentation_state == EV_PRESENTATION_END) {
6672                 ev_view_reset_presentation_state (view);
6673                 return TRUE;
6674         }
6675
6676         if (view->presentation &&
6677             (view->presentation_state == EV_PRESENTATION_BLACK ||
6678              view->presentation_state == EV_PRESENTATION_WHITE)) {
6679                 ev_view_reset_presentation_state (view);
6680                 return FALSE;
6681         }
6682
6683         if (view->animation) {
6684                 ev_view_transition_animation_cancel (view->animation, view);
6685         }
6686
6687         ev_view_reset_presentation_state (view);
6688
6689         page = ev_document_model_get_page (view->model);
6690
6691         if (view->dual_page && !view->presentation)
6692                 page = page - 2;
6693         else
6694                 page = page - 1;
6695
6696         if (page >= 0) {
6697                 ev_document_model_set_page (view->model, page);
6698                 return TRUE;
6699         } else if (ev_view_get_dual_page (view) && page == -1) {
6700                 ev_document_model_set_page (view->model, 0);
6701                 return TRUE;
6702         } else {
6703                 return FALSE;
6704         }
6705 }
6706