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 && start != -1; i++) {
 729                         hide_annotation_windows (view, i);
 730                 }
 731
 732                 for (i = end; i > view->end_page && end != -1; 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         gint n_pages;
2788
2789         n_pages = ev_document_get_n_pages (view->document) + 1;
2790         get_page_y_offset (view, n_pages, &requisition->height);
2791
2792         switch (view->sizing_mode) {
2793                 case EV_SIZING_FIT_WIDTH:
2794                 case EV_SIZING_BEST_FIT:
2795                         requisition->width = 1;
2796
2797                         break;
2798                 case EV_SIZING_FREE: {
2799                         gint max_width;
2800                         GtkBorder border;
2801
2802                         ev_view_get_max_page_size (view, &max_width, NULL);
2803                         compute_border (view, max_width, max_width, &border);
2804                         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2805                 }
2806                         break;
2807                 default:
2808                         g_assert_not_reached ();
2809         }
2810 }
2811
2812 static void
2813 ev_view_size_request_continuous (EvView         *view,
2814                                  GtkRequisition *requisition)
2815 {
2816         gint n_pages;
2817
2818         n_pages = ev_document_get_n_pages (view->document);
2819         get_page_y_offset (view, n_pages, &requisition->height);
2820
2821         switch (view->sizing_mode) {
2822                 case EV_SIZING_FIT_WIDTH:
2823                 case EV_SIZING_BEST_FIT:
2824                         requisition->width = 1;
2825
2826                         break;
2827                 case EV_SIZING_FREE: {
2828                         gint max_width;
2829                         GtkBorder border;
2830
2831                         ev_view_get_max_page_size (view, &max_width, NULL);
2832                         compute_border (view, max_width, max_width, &border);
2833                         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2834                 }
2835                         break;
2836                 default:
2837                         g_assert_not_reached ();
2838         }
2839 }
2840
2841 static void
2842 ev_view_size_request_dual_page (EvView         *view,
2843                                 GtkRequisition *requisition)
2844 {
2845         GtkBorder border;
2846         gint width, height;
2847
2848         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2849                 requisition->width = 1;
2850                 requisition->height = 1;
2851
2852                 return;
2853         }
2854
2855         /* Find the largest of the two. */
2856         ev_view_get_page_size (view,
2857                                view->current_page,
2858                                &width, &height);
2859         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
2860                 gint width_2, height_2;
2861                 ev_view_get_page_size (view,
2862                                        view->current_page + 1,
2863                                        &width_2, &height_2);
2864                 if (width_2 > width) {
2865                         width = width_2;
2866                         height = height_2;
2867                 }
2868         }
2869         compute_border (view, width, height, &border);
2870
2871         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
2872                 ((width + border.left + border.right) * 2) + (view->spacing * 3);
2873         requisition->height = (height + border.top + border.bottom) + (view->spacing * 2);
2874 }
2875
2876 static void
2877 ev_view_size_request_single_page (EvView         *view,
2878                                   GtkRequisition *requisition)
2879 {
2880         GtkBorder border;
2881         gint width, height;
2882
2883         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2884                 requisition->width = 1;
2885                 requisition->height = 1;
2886
2887                 return;
2888         }
2889
2890         ev_view_get_page_size (view, view->current_page, &width, &height);
2891         compute_border (view, width, height, &border);
2892
2893         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
2894                 width + border.left + border.right + (2 * view->spacing);
2895         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2896 }
2897
2898 static void
2899 ev_view_size_request (GtkWidget      *widget,
2900                       GtkRequisition *requisition)
2901 {
2902         EvView *view = EV_VIEW (widget);
2903
2904         if (view->document == NULL) {
2905                 requisition->width = 1;
2906                 requisition->height = 1;
2907                 return;
2908         }
2909
2910         if (view->presentation) {
2911                 requisition->width = 1;
2912                 requisition->height = 1;
2913                 return;
2914         }
2915
2916         if (view->continuous && view->dual_page)
2917                 ev_view_size_request_continuous_dual_page (view, requisition);
2918         else if (view->continuous)
2919                 ev_view_size_request_continuous (view, requisition);
2920         else if (view->dual_page)
2921                 ev_view_size_request_dual_page (view, requisition);
2922         else
2923                 ev_view_size_request_single_page (view, requisition);
2924 }
2925
2926 static void
2927 ev_view_size_allocate (GtkWidget      *widget,
2928                        GtkAllocation  *allocation)
2929 {
2930         EvView *view = EV_VIEW (widget);
2931         GList  *children, *l;
2932         gint    root_x, root_y;
2933
2934         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2935
2936         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2937             view->sizing_mode == EV_SIZING_BEST_FIT) {
2938                 ev_view_zoom_for_size (view,
2939                                        allocation->width,
2940                                        allocation->height);
2941                 ev_view_size_request (widget, &widget->requisition);
2942         }
2943
2944         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2945         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2946
2947         if (view->document)
2948                 view_update_range_and_current_page (view);
2949
2950         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2951         view->pending_resize = FALSE;
2952         view->pending_point.x = 0;
2953         view->pending_point.y = 0;
2954
2955         children = gtk_container_get_children (GTK_CONTAINER (widget));
2956         for (l = children; l && l->data; l = g_list_next (l)) {
2957                 EvFormField   *field;
2958                 GdkRectangle   view_area;
2959                 GList         *form_field_mapping;
2960                 GtkAllocation  child_allocation;
2961                 GtkRequisition child_requisition;
2962                 GtkWidget     *child = (GtkWidget *)l->data;
2963
2964                 field = g_object_get_data (G_OBJECT (child), "form-field");
2965                 if (!field)
2966                         continue;
2967
2968                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2969                                                                              field->page->index);
2970                 ev_view_get_area_from_mapping (view, field->page->index,
2971                                                form_field_mapping,
2972                                                field, &view_area);
2973
2974                 gtk_widget_size_request (child, &child_requisition);
2975                 if (child_requisition.width != view_area.width ||
2976                     child_requisition.height != view_area.height)
2977                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2978
2979                 gtk_container_child_get (GTK_CONTAINER (widget),
2980                                          child,
2981                                          "x", &child_allocation.x,
2982                                          "y", &child_allocation.y,
2983                                          NULL);
2984                 if (child_allocation.x != view_area.x ||
2985                     child_allocation.y != view_area.y) {
2986                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2987                 }
2988         }
2989         g_list_free (children);
2990
2991         if (view->window_children)
2992                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2993                                        &root_x, &root_y);
2994
2995         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2996                 EvViewWindowChild *child;
2997                 EvRectangle        doc_rect;
2998                 GdkRectangle       view_rect;
2999
3000                 child = (EvViewWindowChild *)l->data;
3001
3002                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
3003                 if (child->moved) {
3004                         doc_rect.x1 = child->orig_x;
3005                         doc_rect.y1 = child->orig_y;
3006                 }
3007                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
3008                 view_rect.x -= view->scroll_x;
3009                 view_rect.y -= view->scroll_y;
3010
3011                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
3012                         child->parent_x = root_x;
3013                         child->parent_y = root_y;
3014                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
3015                 }
3016         }
3017 }
3018
3019 static void
3020 ev_view_realize (GtkWidget *widget)
3021 {
3022         EvView *view = EV_VIEW (widget);
3023
3024         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
3025                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
3026
3027         gdk_window_set_events (view->layout.bin_window,
3028                                (gdk_window_get_events (view->layout.bin_window) |
3029                                 GDK_EXPOSURE_MASK |
3030                                 GDK_BUTTON_PRESS_MASK |
3031                                 GDK_BUTTON_RELEASE_MASK |
3032                                 GDK_SCROLL_MASK |
3033                                 GDK_KEY_PRESS_MASK |
3034                                 GDK_POINTER_MOTION_MASK |
3035                                 GDK_POINTER_MOTION_HINT_MASK |
3036                                 GDK_ENTER_NOTIFY_MASK |
3037                                 GDK_LEAVE_NOTIFY_MASK));
3038
3039         if (view->presentation)
3040                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
3041         else
3042                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
3043
3044         on_adjustment_value_changed (NULL, view);
3045 }
3046
3047 static gboolean
3048 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
3049 {
3050         EvView *view = EV_VIEW (widget);
3051         guint state;
3052
3053         state = event->state & gtk_accelerator_get_default_mod_mask ();
3054
3055         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
3056                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
3057                 if (event->direction == GDK_SCROLL_UP ||
3058                     event->direction == GDK_SCROLL_LEFT) {
3059                         if (ev_view_can_zoom_in (view)) {
3060                                 ev_view_zoom_in (view);
3061                         }
3062                 } else {
3063                         if (ev_view_can_zoom_out (view)) {
3064                                 ev_view_zoom_out (view);
3065                         }
3066                 }
3067
3068                 return TRUE;
3069         }
3070
3071         view->jump_to_find_result = FALSE;
3072
3073         /* Shift+Wheel scrolls the in the perpendicular direction */
3074         if (state & GDK_SHIFT_MASK) {
3075                 if (event->direction == GDK_SCROLL_UP)
3076                         event->direction = GDK_SCROLL_LEFT;
3077                 else if (event->direction == GDK_SCROLL_LEFT)
3078                         event->direction = GDK_SCROLL_UP;
3079                 else if (event->direction == GDK_SCROLL_DOWN)
3080                         event->direction = GDK_SCROLL_RIGHT;
3081                 else if (event->direction == GDK_SCROLL_RIGHT)
3082                         event->direction = GDK_SCROLL_DOWN;
3083
3084                 event->state &= ~GDK_SHIFT_MASK;
3085                 state &= ~GDK_SHIFT_MASK;
3086         }
3087
3088         if (state == 0 &&
3089             (view->presentation ||
3090              (view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous))) {
3091                 switch (event->direction) {
3092                         case GDK_SCROLL_DOWN:
3093                         case GDK_SCROLL_RIGHT:
3094                                 ev_view_next_page (view);
3095                                 break;
3096                         case GDK_SCROLL_UP:
3097                         case GDK_SCROLL_LEFT:
3098                                 ev_view_previous_page (view);
3099                                 break;
3100                 }
3101
3102                 return TRUE;
3103         }
3104
3105         return FALSE;
3106 }
3107
3108 static EvViewSelection *
3109 find_selection_for_page (EvView *view,
3110                          gint    page)
3111 {
3112         GList *list;
3113
3114         for (list = view->selection_info.selections; list != NULL; list = list->next) {
3115                 EvViewSelection *selection;
3116
3117                 selection = (EvViewSelection *) list->data;
3118
3119                 if (selection->page == page)
3120                         return selection;
3121         }
3122
3123         return NULL;
3124 }
3125
3126 static void
3127 draw_end_presentation_page (EvView       *view,
3128                             GdkRectangle *page_area)
3129 {
3130         PangoLayout *layout;
3131         PangoFontDescription *font_desc;
3132         gchar *markup;
3133         const gchar *text = _("End of presentation. Press Escape to exit.");
3134
3135         if (view->presentation_state != EV_PRESENTATION_END)
3136                 return;
3137
3138         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
3139         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
3140         pango_layout_set_markup (layout, markup, -1);
3141         g_free (markup);
3142
3143         font_desc = pango_font_description_new ();
3144         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
3145         pango_layout_set_font_description (layout, font_desc);
3146
3147         gtk_paint_layout (GTK_WIDGET (view)->style,
3148                           view->layout.bin_window,
3149                           GTK_WIDGET_STATE (view),
3150                           FALSE,
3151                           page_area,
3152                           GTK_WIDGET (view),
3153                           NULL,
3154                           page_area->x + 15,
3155                           page_area->y + 15,
3156                           layout);
3157
3158         pango_font_description_free (font_desc);
3159         g_object_unref (layout);
3160 }
3161
3162 static gboolean
3163 ev_view_expose_event (GtkWidget      *widget,
3164                       GdkEventExpose *event)
3165 {
3166         EvView  *view = EV_VIEW (widget);
3167         cairo_t *cr;
3168         gint     i;
3169
3170         if (view->animation) {
3171                 if (ev_transition_animation_ready (view->animation)) {
3172                         GdkRectangle page_area;
3173                         GtkBorder    border;
3174
3175                         if (get_page_extents (view, view->current_page, &page_area, &border)) {
3176                                 cr = gdk_cairo_create (view->layout.bin_window);
3177
3178                                 /* normalize to x=0, y=0 */
3179                                 cairo_translate (cr, page_area.x, page_area.y);
3180                                 page_area.x = page_area.y = 0;
3181
3182                                 ev_transition_animation_paint (view->animation, cr, page_area);
3183                                 cairo_destroy (cr);
3184                         }
3185                 }
3186
3187                 return TRUE;
3188         }
3189
3190         if (view->presentation) {
3191                 switch (view->presentation_state) {
3192                         case EV_PRESENTATION_END: {
3193                                 GdkRectangle area = {0};
3194
3195                                 area.width = widget->allocation.width;
3196                                 area.height = widget->allocation.height;
3197
3198                                 draw_end_presentation_page (view, &area);
3199                         }
3200                                 return FALSE;
3201                         case EV_PRESENTATION_BLACK:
3202                         case EV_PRESENTATION_WHITE:
3203                                 return FALSE;
3204                         case EV_PRESENTATION_NORMAL:
3205                         default:
3206                                 break;
3207                 }
3208         } else if (view->loading) {
3209                 GdkRectangle area = {0};
3210
3211                 area.width = widget->allocation.width;
3212                 area.height = widget->allocation.height;
3213
3214                 draw_loading_text (view,
3215                                    &area,
3216                                    &(event->area));
3217         }
3218
3219         if (view->document == NULL)
3220                 return FALSE;
3221
3222         cr = gdk_cairo_create (view->layout.bin_window);
3223
3224         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3225                 GdkRectangle page_area;
3226                 GtkBorder border;
3227                 gboolean page_ready = TRUE;
3228
3229                 if (!get_page_extents (view, i, &page_area, &border))
3230                         continue;
3231
3232                 page_area.x -= view->scroll_x;
3233                 page_area.y -= view->scroll_y;
3234
3235                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
3236
3237                 if (page_ready && view->find_pages && view->highlight_find_results)
3238                         highlight_find_results (view, i);
3239                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3240                         show_annotation_windows (view, i);
3241         }
3242
3243         cairo_destroy (cr);
3244
3245         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3246                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3247
3248         return FALSE;
3249 }
3250
3251 static gboolean
3252 ev_view_do_popup_menu (EvView *view,
3253                        gdouble x,
3254                        gdouble y)
3255 {
3256         EvLink       *link;
3257         EvImage      *image;
3258         EvAnnotation *annot;
3259
3260         image = ev_view_get_image_at_location (view, x, y);
3261         if (image) {
3262                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
3263                 return TRUE;
3264         }
3265
3266         link = ev_view_get_link_at_location (view, x, y);
3267         if (link) {
3268                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
3269                 return TRUE;
3270         }
3271
3272         annot = ev_view_get_annotation_at_location (view, x, y);
3273         if (annot) {
3274                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, annot);
3275                 return TRUE;
3276         }
3277
3278         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
3279
3280         return TRUE;
3281 }
3282
3283 static gboolean
3284 ev_view_popup_menu (GtkWidget *widget)
3285 {
3286         gint x, y;
3287
3288         gtk_widget_get_pointer (widget, &x, &y);
3289         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3290 }
3291
3292 static void
3293 get_link_area (EvView       *view,
3294                gint          x,
3295                gint          y,
3296                EvLink       *link,
3297                GdkRectangle *area)
3298 {
3299         GList *link_mapping;
3300         gint   page;
3301         gint   x_offset = 0, y_offset = 0;
3302
3303         x += view->scroll_x;
3304         y += view->scroll_y;
3305
3306         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3307
3308         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
3309         ev_view_get_area_from_mapping (view, page,
3310                                        link_mapping,
3311                                        link, area);
3312 }
3313
3314 static void
3315 get_annot_area (EvView       *view,
3316                gint          x,
3317                gint          y,
3318                EvAnnotation *annot,
3319                GdkRectangle *area)
3320 {
3321         GList *annots_mapping;
3322         gint   page;
3323         gint   x_offset = 0, y_offset = 0;
3324
3325         x += view->scroll_x;
3326         y += view->scroll_y;
3327
3328         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3329
3330         annots_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
3331         ev_view_get_area_from_mapping (view, page,
3332                                        annots_mapping,
3333                                        annot, area);
3334 }
3335
3336 static gboolean
3337 ev_view_query_tooltip (GtkWidget  *widget,
3338                        gint        x,
3339                        gint        y,
3340                        gboolean    keyboard_tip,
3341                        GtkTooltip *tooltip)
3342 {
3343         EvView       *view = EV_VIEW (widget);
3344         EvLink       *link;
3345         EvAnnotation *annot;
3346         gchar        *text;
3347
3348         annot = ev_view_get_annotation_at_location (view, x, y);
3349         if (annot && annot->contents) {
3350                 GdkRectangle annot_area;
3351
3352                 get_annot_area (view, x, y, annot, &annot_area);
3353                 gtk_tooltip_set_text (tooltip, annot->contents);
3354                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
3355
3356                 return TRUE;
3357         }
3358
3359         link = ev_view_get_link_at_location (view, x, y);
3360         if (!link)
3361                 return FALSE;
3362
3363         text = tip_from_link (view, link);
3364         if (text && g_utf8_validate (text, -1, NULL)) {
3365                 GdkRectangle link_area;
3366
3367                 get_link_area (view, x, y, link, &link_area);
3368                 gtk_tooltip_set_text (tooltip, text);
3369                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3370         }
3371         g_free (text);
3372
3373         return TRUE;
3374 }
3375
3376 static void
3377 start_selection_for_event (EvView         *view,
3378                            GdkEventButton *event)
3379 {
3380         clear_selection (view);
3381
3382         view->selection_info.start.x = event->x + view->scroll_x;
3383         view->selection_info.start.y = event->y + view->scroll_y;
3384
3385         switch (event->type) {
3386                 case GDK_2BUTTON_PRESS:
3387                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3388                         break;
3389                 case GDK_3BUTTON_PRESS:
3390                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3391                         break;
3392                 default:
3393                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3394                         return;
3395         }
3396
3397         /* In case of WORD or LINE, compute selections now */
3398         compute_selections (view,
3399                             view->selection_info.style,
3400                             &(view->selection_info.start),
3401                             &(view->selection_info.start));
3402 }
3403
3404 static gboolean
3405 ev_view_button_press_event (GtkWidget      *widget,
3406                             GdkEventButton *event)
3407 {
3408         EvView *view = EV_VIEW (widget);
3409
3410         if (!view->document)
3411                 return FALSE;
3412
3413         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3414                 gtk_widget_grab_focus (widget);
3415         }
3416
3417         if (view->window_child_focus) {
3418                 EvAnnotationWindow *window;
3419                 EvAnnotation       *annot;
3420
3421                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3422                 annot = ev_annotation_window_get_annotation (window);
3423                 ev_annotation_window_ungrab_focus (window);
3424                 ev_view_annotation_save (view, annot);
3425                 view->window_child_focus = NULL;
3426         }
3427
3428         view->pressed_button = event->button;
3429         view->selection_info.in_drag = FALSE;
3430
3431         if (view->scroll_info.autoscrolling)
3432                 return TRUE;
3433
3434         switch (event->button) {
3435                 case 1: {
3436                         EvImage *image;
3437                         EvAnnotation *annot;
3438                         EvFormField *field;
3439
3440                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3441                                 if (event->type == GDK_3BUTTON_PRESS) {
3442                                         start_selection_for_event (view, event);
3443                                 } else if (location_in_selected_text (view,
3444                                                                event->x + view->scroll_x,
3445                                                                event->y + view->scroll_y)) {
3446                                         view->selection_info.in_drag = TRUE;
3447                                 } else {
3448                                         start_selection_for_event (view, event);
3449                                 }
3450
3451                                 gtk_widget_queue_draw (widget);
3452                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3453                                 ev_view_handle_annotation (view, annot, event->x, event->y, event->time);
3454                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3455                                 ev_view_remove_all (view);
3456                                 ev_view_handle_form_field (view, field, event->x, event->y);
3457                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3458                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3459                                 if (view->image_dnd_info.image)
3460                                         g_object_unref (view->image_dnd_info.image);
3461                                 view->image_dnd_info.image = g_object_ref (image);
3462                                 view->image_dnd_info.in_drag = TRUE;
3463
3464                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3465                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3466                         } else {
3467                                 ev_view_remove_all (view);
3468
3469                                 if (EV_IS_SELECTION (view->document))
3470                                         start_selection_for_event (view, event);
3471                         }
3472                 }
3473                         return TRUE;
3474                 case 2:
3475                         /* use root coordinates as reference point because
3476                          * scrolling changes window relative coordinates */
3477                         view->drag_info.start.x = event->x_root;
3478                         view->drag_info.start.y = event->y_root;
3479                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3480                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3481
3482                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3483
3484                         return TRUE;
3485                 case 3:
3486                         view->scroll_info.start_y = event->y;
3487                         return ev_view_do_popup_menu (view, event->x, event->y);
3488         }
3489
3490         return FALSE;
3491 }
3492
3493 static void
3494 ev_view_remove_all (EvView *view)
3495 {
3496         GList *children, *child;
3497
3498         children = gtk_container_get_children (GTK_CONTAINER (view));
3499         for (child = children; child && child->data; child = g_list_next (child)) {
3500                 gtk_container_remove (GTK_CONTAINER (view),
3501                                       GTK_WIDGET (child->data));
3502         }
3503         g_list_free (children);
3504 }
3505
3506 /*** Drag and Drop ***/
3507 static void
3508 ev_view_drag_data_get (GtkWidget        *widget,
3509                        GdkDragContext   *context,
3510                        GtkSelectionData *selection_data,
3511                        guint             info,
3512                        guint             time)
3513 {
3514         EvView *view = EV_VIEW (widget);
3515
3516         switch (info) {
3517                 case TARGET_DND_TEXT:
3518                         if (EV_IS_SELECTION (view->document) &&
3519                             view->selection_info.selections) {
3520                                 gchar *text;
3521
3522                                 text = get_selected_text (view);
3523                                 gtk_selection_data_set_text (selection_data,
3524                                                              text,
3525                                                              strlen (text));
3526                                 g_free (text);
3527                         }
3528                         break;
3529                 case TARGET_DND_IMAGE:
3530                         if (view->image_dnd_info.image) {
3531                                 GdkPixbuf *pixbuf;
3532
3533                                 ev_document_doc_mutex_lock ();
3534                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3535                                                                        view->image_dnd_info.image);
3536                                 ev_document_doc_mutex_unlock ();
3537
3538                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3539                                 g_object_unref (pixbuf);
3540                         }
3541                         break;
3542                 case TARGET_DND_URI:
3543                         if (view->image_dnd_info.image) {
3544                                 GdkPixbuf   *pixbuf;
3545                                 const gchar *tmp_uri;
3546                                 gchar       *uris[2];
3547
3548                                 ev_document_doc_mutex_lock ();
3549                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3550                                                                        view->image_dnd_info.image);
3551                                 ev_document_doc_mutex_unlock ();
3552
3553                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3554                                 g_object_unref (pixbuf);
3555
3556                                 uris[0] = (gchar *)tmp_uri;
3557                                 uris[1] = NULL;
3558                                 gtk_selection_data_set_uris (selection_data, uris);
3559                         }
3560         }
3561 }
3562
3563 static gboolean
3564 ev_view_drag_motion (GtkWidget      *widget,
3565                      GdkDragContext *context,
3566                      gint            x,
3567                      gint            y,
3568                      guint           time)
3569 {
3570         if (gtk_drag_get_source_widget (context) == widget)
3571                 gdk_drag_status (context, 0, time);
3572         else
3573                 gdk_drag_status (context, context->suggested_action, time);
3574
3575         return TRUE;
3576 }
3577
3578 static gboolean
3579 selection_update_idle_cb (EvView *view)
3580 {
3581         compute_selections (view,
3582                             view->selection_info.style,
3583                             &view->selection_info.start,
3584                             &view->motion);
3585         view->selection_update_id = 0;
3586         return FALSE;
3587 }
3588
3589 static gboolean
3590 selection_scroll_timeout_cb (EvView *view)
3591 {
3592         gint x, y, shift = 0;
3593         GtkWidget *widget = GTK_WIDGET (view);
3594
3595         gtk_widget_get_pointer (widget, &x, &y);
3596
3597         if (y > widget->allocation.height) {
3598                 shift = (y - widget->allocation.height) / 2;
3599         } else if (y < 0) {
3600                 shift = y / 2;
3601         }
3602
3603         if (shift)
3604                 gtk_adjustment_set_value (view->vadjustment,
3605                                           CLAMP (view->vadjustment->value + shift,
3606                                           view->vadjustment->lower,
3607                                           view->vadjustment->upper -
3608                                           view->vadjustment->page_size));
3609
3610         if (x > widget->allocation.width) {
3611                 shift = (x - widget->allocation.width) / 2;
3612         } else if (x < 0) {
3613                 shift = x / 2;
3614         }
3615
3616         if (shift)
3617                 gtk_adjustment_set_value (view->hadjustment,
3618                                           CLAMP (view->hadjustment->value + shift,
3619                                           view->hadjustment->lower,
3620                                           view->hadjustment->upper -
3621                                           view->hadjustment->page_size));
3622
3623         return TRUE;
3624 }
3625
3626 static gboolean
3627 ev_view_drag_update_momentum (EvView *view)
3628 {
3629         int i;
3630         if (!view->drag_info.in_drag)
3631                 return FALSE;
3632
3633         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3634                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3635                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3636         }
3637
3638         /* Momentum is a moving average of 10ms granularity over
3639          * the last 100ms with each 10ms stored in buffer.
3640          */
3641
3642         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3643         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3644
3645         return TRUE;
3646 }
3647
3648 static gboolean
3649 ev_view_scroll_drag_release (EvView *view)
3650 {
3651         gdouble dhadj_value, dvadj_value;
3652         gdouble oldhadjustment, oldvadjustment;
3653
3654         view->drag_info.momentum.x /= 1.2;
3655         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3656
3657         dhadj_value = view->hadjustment->page_size *
3658                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
3659         dvadj_value = view->vadjustment->page_size *
3660                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
3661
3662         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3663         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3664
3665      /* When we reach the edges, we need either to absorb some momentum and bounce by
3666       * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3667      if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
3668            ((oldhadjustment + dhadj_value) < 0))
3669                 view->drag_info.momentum.x = 0;
3670         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
3671            ((oldvadjustment + dvadj_value) < 0))
3672                 view->drag_info.momentum.y = 0;
3673
3674         gtk_adjustment_set_value (view->hadjustment,
3675                                 MIN (oldhadjustment + dhadj_value,
3676                                 view->hadjustment->upper - view->hadjustment->page_size));
3677         gtk_adjustment_set_value (view->vadjustment,
3678                                 MIN (oldvadjustment + dvadj_value,
3679                                 view->vadjustment->upper - view->vadjustment->page_size));
3680
3681         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3682            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3683                 return FALSE;
3684         else
3685                 return TRUE;
3686 }
3687
3688 static gboolean
3689 ev_view_motion_notify_event (GtkWidget      *widget,
3690                              GdkEventMotion *event)
3691 {
3692         EvView *view = EV_VIEW (widget);
3693         gint x, y;
3694
3695         if (!view->document)
3696                 return FALSE;
3697
3698
3699         if (event->is_hint || event->window != view->layout.bin_window) {
3700             gtk_widget_get_pointer (widget, &x, &y);
3701         } else {
3702             x = event->x;
3703             y = event->y;
3704         }
3705
3706         if (view->scroll_info.autoscrolling) {
3707                 view->scroll_info.last_y = y;
3708                 return TRUE;
3709         }
3710
3711         if (view->selection_info.in_drag) {
3712                 if (gtk_drag_check_threshold (widget,
3713                                               view->selection_info.start.x,
3714                                               view->selection_info.start.y,
3715                                               x, y)) {
3716                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3717
3718                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3719
3720                         gtk_drag_begin (widget, target_list,
3721                                         GDK_ACTION_COPY,
3722                                         1, (GdkEvent *)event);
3723
3724                         view->selection_info.in_drag = FALSE;
3725
3726                         gtk_target_list_unref (target_list);
3727
3728                         return TRUE;
3729                 }
3730         } else if (view->image_dnd_info.in_drag) {
3731                 if (gtk_drag_check_threshold (widget,
3732                                               view->selection_info.start.x,
3733                                               view->selection_info.start.y,
3734                                               x, y)) {
3735                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3736
3737                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3738                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3739
3740                         gtk_drag_begin (widget, target_list,
3741                                         GDK_ACTION_COPY,
3742                                         1, (GdkEvent *)event);
3743
3744                         view->image_dnd_info.in_drag = FALSE;
3745
3746                         gtk_target_list_unref (target_list);
3747
3748                         return TRUE;
3749                 }
3750         }
3751
3752         switch (view->pressed_button) {
3753         case 1:
3754                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3755                  * documents only.
3756                  */
3757                 if (view->rotation != 0)
3758                         return FALSE;
3759
3760                 /* Schedule timeout to scroll during selection and additionally
3761                  * scroll once to allow arbitrary speed. */
3762                 if (!view->selection_scroll_id)
3763                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3764                                                                (GSourceFunc)selection_scroll_timeout_cb,
3765                                                                view);
3766                 else
3767                     selection_scroll_timeout_cb (view);
3768
3769                 view->selection_info.in_selection = TRUE;
3770                 view->motion.x = x + view->scroll_x;
3771                 view->motion.y = y + view->scroll_y;
3772
3773                 /* Queue an idle to handle the motion.  We do this because
3774                  * handling any selection events in the motion could be slower
3775                  * than new motion events reach us.  We always put it in the
3776                  * idle to make sure we catch up and don't visibly lag the
3777                  * mouse. */
3778                 if (!view->selection_update_id)
3779                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3780
3781                 return TRUE;
3782         case 2:
3783                 if (!view->drag_info.in_drag) {
3784                         gboolean start;
3785                         int i;
3786
3787                         start = gtk_drag_check_threshold (widget,
3788                                                           view->drag_info.start.x,
3789                                                           view->drag_info.start.y,
3790                                                           event->x_root,
3791                                                           event->y_root);
3792                         view->drag_info.in_drag = start;
3793                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3794                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3795                         /* Set 100 to choose how long it takes to build up momentum */
3796                         /* Clear out previous momentum info: */
3797                         for (i = 0; i < DRAG_HISTORY; i++) {
3798                                 view->drag_info.buffer[i].x = event->x;
3799                                 view->drag_info.buffer[i].y = event->y;
3800                         }
3801                         view->drag_info.momentum.x = 0;
3802                         view->drag_info.momentum.y = 0;
3803                 }
3804
3805                 if (view->drag_info.in_drag) {
3806                         int dx, dy;
3807                         gdouble dhadj_value, dvadj_value;
3808
3809                         view->drag_info.buffer[0].x = event->x;
3810                         view->drag_info.buffer[0].y = event->y;
3811
3812                         dx = event->x_root - view->drag_info.start.x;
3813                         dy = event->y_root - view->drag_info.start.y;
3814
3815                         dhadj_value = view->hadjustment->page_size *
3816                                       (gdouble)dx / widget->allocation.width;
3817                         dvadj_value = view->vadjustment->page_size *
3818                                       (gdouble)dy / widget->allocation.height;
3819
3820                         /* clamp scrolling to visible area */
3821                         gtk_adjustment_set_value (view->hadjustment,
3822                                                   MIN(view->drag_info.hadj - dhadj_value,
3823                                                       view->hadjustment->upper -
3824                                                       view->hadjustment->page_size));
3825                         gtk_adjustment_set_value (view->vadjustment,
3826                                                   MIN(view->drag_info.vadj - dvadj_value,
3827                                                       view->vadjustment->upper -
3828                                                       view->vadjustment->page_size));
3829
3830                         return TRUE;
3831                 }
3832
3833                 break;
3834         default:
3835                 ev_view_handle_cursor_over_xy (view, x, y);
3836         }
3837
3838         return FALSE;
3839 }
3840
3841 static gboolean
3842 ev_view_button_release_event (GtkWidget      *widget,
3843                               GdkEventButton *event)
3844 {
3845         EvView *view = EV_VIEW (widget);
3846         EvLink *link = NULL;
3847
3848         view->image_dnd_info.in_drag = FALSE;
3849
3850         if (view->scroll_info.autoscrolling) {
3851                 ev_view_autoscroll_stop (view);
3852                 view->pressed_button = -1;
3853
3854                 return TRUE;
3855         }
3856
3857         if (view->drag_info.in_drag) {
3858                 view->drag_info.release_timeout_id =
3859                         g_timeout_add (20,
3860                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3861         }
3862
3863         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3864                 link = ev_view_get_link_at_location (view, event->x, event->y);
3865         }
3866
3867         view->drag_info.in_drag = FALSE;
3868
3869         if (view->pressed_button == 2) {
3870                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3871         }
3872
3873         view->pressed_button = -1;
3874
3875         if (view->selection_scroll_id) {
3876             g_source_remove (view->selection_scroll_id);
3877             view->selection_scroll_id = 0;
3878         }
3879         if (view->selection_update_id) {
3880             g_source_remove (view->selection_update_id);
3881             view->selection_update_id = 0;
3882         }
3883
3884         if (view->selection_info.selections) {
3885                 clear_link_selected (view);
3886                 ev_view_update_primary_selection (view);
3887
3888                 if (view->selection_info.in_drag) {
3889                         clear_selection (view);
3890                         gtk_widget_queue_draw (widget);
3891                 }
3892
3893                 view->selection_info.in_drag = FALSE;
3894         } else if (link) {
3895                 if (event->button == 2) {
3896                         EvLinkAction    *action;
3897                         EvLinkActionType type;
3898
3899                         action = ev_link_get_action (link);
3900                         if (!action)
3901                                 return FALSE;
3902
3903                         type = ev_link_action_get_action_type (action);
3904                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3905                                 g_signal_emit (view,
3906                                                signals[SIGNAL_EXTERNAL_LINK],
3907                                                0, action);
3908                         }
3909                 } else {
3910                         ev_view_handle_link (view, link);
3911                 }
3912         } else if (view->presentation) {
3913                 switch (event->button) {
3914                         case 1:
3915                                 ev_view_next_page (view);
3916                                 return TRUE;
3917                         case 3:
3918                                 ev_view_previous_page (view);
3919                                 return TRUE;
3920                 }
3921         }
3922
3923         return FALSE;
3924 }
3925
3926 /* Goto Window */
3927 /* Cut and paste from gtkwindow.c */
3928 static void
3929 send_focus_change (GtkWidget *widget,
3930                    gboolean   in)
3931 {
3932         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3933
3934         g_object_ref (widget);
3935
3936         if (in)
3937                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3938         else
3939                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3940
3941         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3942         fevent->focus_change.window = g_object_ref (widget->window);
3943         fevent->focus_change.in = in;
3944
3945         gtk_widget_event (widget, fevent);
3946
3947         g_object_notify (G_OBJECT (widget), "has-focus");
3948
3949         g_object_unref (widget);
3950         gdk_event_free (fevent);
3951 }
3952
3953 static void
3954 ev_view_goto_window_hide (EvView *view)
3955 {
3956         /* send focus-in event */
3957         send_focus_change (view->goto_entry, FALSE);
3958         gtk_widget_hide (view->goto_window);
3959         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3960 }
3961
3962 static gboolean
3963 ev_view_goto_window_delete_event (GtkWidget   *widget,
3964                                   GdkEventAny *event,
3965                                   EvView      *view)
3966 {
3967         ev_view_goto_window_hide (view);
3968
3969         return TRUE;
3970 }
3971
3972 static gboolean
3973 key_is_numeric (guint keyval)
3974 {
3975         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3976                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3977 }
3978
3979 static gboolean
3980 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3981                                      GdkEventKey *event,
3982                                      EvView      *view)
3983 {
3984         switch (event->keyval) {
3985                 case GDK_Escape:
3986                 case GDK_Tab:
3987                 case GDK_KP_Tab:
3988                 case GDK_ISO_Left_Tab:
3989                         ev_view_goto_window_hide (view);
3990                         return TRUE;
3991                 case GDK_Return:
3992                 case GDK_KP_Enter:
3993                 case GDK_ISO_Enter:
3994                 case GDK_BackSpace:
3995                 case GDK_Delete:
3996                         return FALSE;
3997                 default:
3998                         if (!key_is_numeric (event->keyval))
3999                                 return TRUE;
4000         }
4001
4002         return FALSE;
4003 }
4004
4005 static gboolean
4006 ev_view_goto_window_button_press_event (GtkWidget      *widget,
4007                                         GdkEventButton *event,
4008                                         EvView         *view)
4009 {
4010         ev_view_goto_window_hide (view);
4011
4012         return TRUE;
4013 }
4014
4015 static void
4016 ev_view_goto_entry_activate (GtkEntry *entry,
4017                              EvView   *view)
4018 {
4019         const gchar *text;
4020         gint         page;
4021
4022         text = gtk_entry_get_text (entry);
4023         page = atoi (text) - 1;
4024
4025         ev_view_goto_window_hide (view);
4026
4027         if (page >= 0 && page < ev_document_get_n_pages (view->document)) {
4028                 ev_document_model_set_page (view->model, page);
4029         }
4030 }
4031
4032 static void
4033 ev_view_goto_window_create (EvView *view)
4034 {
4035         GtkWidget *frame, *hbox, *toplevel, *label;
4036
4037         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
4038
4039         if (view->goto_window) {
4040                 if (GTK_WINDOW (toplevel)->group)
4041                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
4042                                                      GTK_WINDOW (view->goto_window));
4043                 else if (GTK_WINDOW (view->goto_window)->group)
4044                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
4045                                                         GTK_WINDOW (view->goto_window));
4046                 return;
4047         }
4048
4049         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
4050         gtk_window_set_screen (GTK_WINDOW (view->goto_window),
4051                                gtk_widget_get_screen (GTK_WIDGET (view)));
4052
4053         if (GTK_WINDOW (toplevel)->group)
4054                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
4055                                              GTK_WINDOW (view->goto_window));
4056
4057         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
4058
4059         g_signal_connect (view->goto_window, "delete_event",
4060                           G_CALLBACK (ev_view_goto_window_delete_event),
4061                           view);
4062         g_signal_connect (view->goto_window, "key_press_event",
4063                           G_CALLBACK (ev_view_goto_window_key_press_event),
4064                           view);
4065         g_signal_connect (view->goto_window, "button_press_event",
4066                           G_CALLBACK (ev_view_goto_window_button_press_event),
4067                           view);
4068
4069         frame = gtk_frame_new (NULL);
4070         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
4071         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
4072         gtk_widget_show (frame);
4073
4074         hbox = gtk_hbox_new (FALSE, 0);
4075         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
4076         gtk_container_add (GTK_CONTAINER (frame), hbox);
4077         gtk_widget_show (hbox);
4078
4079         label = gtk_label_new(_("Jump to page:"));
4080         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
4081         gtk_widget_show (label);
4082         gtk_widget_realize (label);
4083
4084         view->goto_entry = gtk_entry_new ();
4085         g_signal_connect (view->goto_entry, "activate",
4086                           G_CALLBACK (ev_view_goto_entry_activate),
4087                           view);
4088         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
4089         gtk_widget_show (view->goto_entry);
4090         gtk_widget_realize (view->goto_entry);
4091 }
4092
4093 static void
4094 ev_view_goto_entry_grab_focus (EvView *view)
4095 {
4096         GtkWidgetClass *entry_parent_class;
4097
4098         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
4099         (entry_parent_class->grab_focus) (view->goto_entry);
4100
4101         send_focus_change (view->goto_entry, TRUE);
4102 }
4103
4104 static void
4105 ev_view_goto_window_send_key_event (EvView   *view,
4106                                     GdkEvent *event)
4107 {
4108         GdkEventKey *new_event;
4109         GdkScreen   *screen;
4110
4111         /* Move goto window off screen */
4112         screen = gtk_widget_get_screen (GTK_WIDGET (view));
4113         gtk_window_move (GTK_WINDOW (view->goto_window),
4114                          gdk_screen_get_width (screen) + 1,
4115                          gdk_screen_get_height (screen) + 1);
4116         gtk_widget_show (view->goto_window);
4117
4118         new_event = (GdkEventKey *) gdk_event_copy (event);
4119         g_object_unref (new_event->window);
4120         new_event->window = g_object_ref (view->goto_window->window);
4121         gtk_widget_realize (view->goto_window);
4122
4123         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
4124         gdk_event_free ((GdkEvent *)new_event);
4125         gtk_widget_hide (view->goto_window);
4126 }
4127
4128 static gboolean
4129 ev_view_key_press_event (GtkWidget   *widget,
4130                          GdkEventKey *event)
4131 {
4132         EvView *view = EV_VIEW (widget);
4133         EvPresentationState current;
4134
4135         if (!view->document)
4136                 return FALSE;
4137
4138         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
4139                 /* Forward key events to current focused window child */
4140                 if (view->window_child_focus) {
4141                         GdkEventKey *new_event;
4142                         gboolean     handled;
4143
4144                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
4145                         g_object_unref (new_event->window);
4146                         new_event->window = g_object_ref (view->window_child_focus->window->window);
4147                         gtk_widget_realize (view->window_child_focus->window);
4148                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
4149                         gdk_event_free ((GdkEvent *)new_event);
4150
4151                         return handled;
4152                 }
4153
4154                 return FALSE;
4155         }
4156
4157         if (!view->presentation ||
4158             view->presentation_state == EV_PRESENTATION_END)
4159                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4160
4161
4162         current = view->presentation_state;
4163
4164         switch (event->keyval) {
4165                 case GDK_b:
4166                 case GDK_B:
4167                 case GDK_period:
4168                 case GDK_KP_Decimal:
4169                         view->presentation_state =
4170                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
4171                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
4172                         break;
4173                 case GDK_w:
4174                 case GDK_W:
4175                         view->presentation_state =
4176                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
4177                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
4178                         break;
4179                 default:
4180                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
4181                             view->presentation_state == EV_PRESENTATION_WHITE) {
4182                                 view->presentation_state = EV_PRESENTATION_NORMAL;
4183                         }
4184         }
4185
4186         if (current == view->presentation_state) {
4187                 if (ev_document_get_n_pages (view->document) > 1 &&
4188                     key_is_numeric (event->keyval)) {
4189                         gint x, y;
4190
4191                         ev_view_goto_window_create (view);
4192                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
4193                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4194                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
4195                         gtk_widget_show (view->goto_window);
4196                         ev_view_goto_entry_grab_focus (view);
4197
4198                         return TRUE;
4199                 }
4200
4201                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4202         }
4203
4204         switch (view->presentation_state) {
4205                 case EV_PRESENTATION_NORMAL:
4206                 case EV_PRESENTATION_BLACK:
4207                         gdk_window_set_background (view->layout.bin_window,
4208                                                    &widget->style->black);
4209                         break;
4210                 case EV_PRESENTATION_WHITE:
4211                         gdk_window_set_background (view->layout.bin_window,
4212                                                    &widget->style->white);
4213                         break;
4214                 default:
4215                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4216         }
4217
4218         gtk_widget_queue_draw (widget);
4219         return TRUE;
4220 }
4221
4222 static gint
4223 ev_view_focus_in (GtkWidget     *widget,
4224                   GdkEventFocus *event)
4225 {
4226         if (EV_VIEW (widget)->pixbuf_cache)
4227                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4228         gtk_widget_queue_draw (widget);
4229
4230         return FALSE;
4231 }
4232
4233 static gint
4234 ev_view_focus_out (GtkWidget     *widget,
4235                      GdkEventFocus *event)
4236 {
4237         if (EV_VIEW (widget)->goto_window)
4238                 ev_view_goto_window_hide (EV_VIEW (widget));
4239
4240         if (EV_VIEW (widget)->pixbuf_cache)
4241                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4242         gtk_widget_queue_draw (widget);
4243
4244         return FALSE;
4245 }
4246
4247 static gboolean
4248 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4249 {
4250         EvView *view = EV_VIEW (widget);
4251
4252         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4253                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4254
4255         return FALSE;
4256 }
4257
4258 static gboolean
4259 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4260 {
4261         EvView *view = EV_VIEW (widget);
4262
4263         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4264
4265         return FALSE;
4266 }
4267
4268 static void
4269 ev_view_style_set (GtkWidget *widget,
4270                    GtkStyle  *old_style)
4271 {
4272         if (EV_VIEW (widget)->pixbuf_cache)
4273                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4274
4275         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
4276 }
4277
4278 /*** Drawing ***/
4279
4280 static guint32
4281 ev_gdk_color_to_rgb (const GdkColor *color)
4282 {
4283   guint32 result;
4284   result = (0xff0000 | (color->red & 0xff00));
4285   result <<= 8;
4286   result |= ((color->green & 0xff00) | (color->blue >> 8));
4287   return result;
4288 }
4289
4290 static void
4291 draw_rubberband (GtkWidget *widget, GdkWindow *window,
4292                  const GdkRectangle *rect, guchar alpha)
4293 {
4294         GdkGC *gc;
4295         GdkPixbuf *pixbuf;
4296         GdkColor *fill_color_gdk;
4297         guint fill_color;
4298
4299         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
4300         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
4301
4302         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
4303                                  rect->width, rect->height);
4304         gdk_pixbuf_fill (pixbuf, fill_color);
4305
4306         gdk_draw_pixbuf (window, NULL, pixbuf,
4307                          0, 0,
4308                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4309                          rect->width, rect->height,
4310                          GDK_RGB_DITHER_NONE,
4311                          0, 0);
4312
4313         g_object_unref (pixbuf);
4314
4315         gc = gdk_gc_new (window);
4316         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
4317         gdk_draw_rectangle (window, gc, FALSE,
4318                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4319                             rect->width - 1,
4320                             rect->height - 1);
4321         g_object_unref (gc);
4322
4323         gdk_color_free (fill_color_gdk);
4324 }
4325
4326
4327 static void
4328 highlight_find_results (EvView *view, int page)
4329 {
4330         gint i, n_results = 0;
4331
4332         n_results = ev_view_find_get_n_results (view, page);
4333
4334         for (i = 0; i < n_results; i++) {
4335                 EvRectangle *rectangle;
4336                 GdkRectangle view_rectangle;
4337                 guchar alpha;
4338
4339                 if (i == view->find_result && page == view->current_page) {
4340                         alpha = 0x90;
4341                 } else {
4342                         alpha = 0x20;
4343                 }
4344
4345                 rectangle = ev_view_find_get_result (view, page, i);
4346                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4347                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
4348                                  &view_rectangle, alpha);
4349         }
4350 }
4351
4352 static void
4353 draw_loading_text (EvView       *view,
4354                    GdkRectangle *page_area,
4355                    GdkRectangle *expose_area)
4356 {
4357         cairo_t *cr;
4358         gint     width, height;
4359
4360         if (!view->loading_text) {
4361                 const gchar *loading_text = _("Loading...");
4362                 PangoLayout *layout;
4363                 PangoFontDescription *font_desc;
4364                 PangoRectangle logical_rect;
4365                 gint target_width;
4366                 gdouble real_scale;
4367
4368                 ev_document_fc_mutex_lock ();
4369
4370                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
4371
4372                 font_desc = pango_font_description_new ();
4373
4374                 /* We set the font to be 10 points, get the size, and scale appropriately */
4375                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
4376                 pango_layout_set_font_description (layout, font_desc);
4377                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4378
4379                 target_width = MAX (page_area->width / 2, 1);
4380                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
4381                 pango_font_description_set_size (font_desc, (int)real_scale);
4382                 pango_layout_set_font_description (layout, font_desc);
4383                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4384
4385                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
4386                                                                  logical_rect.width,
4387                                                                  logical_rect.height);
4388                 cr = cairo_create (view->loading_text);
4389                 cairo_set_source_rgb (cr,
4390                                       155 / (double)255,
4391                                       155 / (double)255,
4392                                       155 / (double)255);
4393                 pango_cairo_show_layout (cr, layout);
4394                 cairo_destroy (cr);
4395
4396                 pango_font_description_free (font_desc);
4397                 g_object_unref (layout);
4398
4399                 ev_document_fc_mutex_unlock ();
4400         }
4401
4402         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
4403         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
4404
4405         cr = gdk_cairo_create (view->layout.bin_window);
4406         cairo_translate (cr,
4407                          page_area->x + width,
4408                          page_area->y + height);
4409         cairo_set_source_surface (cr, view->loading_text, 0, 0);
4410         cairo_paint (cr);
4411         cairo_destroy (cr);
4412 }
4413
4414 static void
4415 draw_one_page (EvView       *view,
4416                gint          page,
4417                cairo_t      *cr,
4418                GdkRectangle *page_area,
4419                GtkBorder    *border,
4420                GdkRectangle *expose_area,
4421                gboolean     *page_ready)
4422 {
4423         GdkRectangle overlap;
4424         GdkRectangle real_page_area;
4425
4426         g_assert (view->document);
4427
4428         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4429                 return;
4430
4431         /* Render the document itself */
4432         real_page_area = *page_area;
4433
4434         real_page_area.x += border->left;
4435         real_page_area.y += border->top;
4436         real_page_area.width -= (border->left + border->right);
4437         real_page_area.height -= (border->top + border->bottom);
4438         *page_ready = TRUE;
4439
4440         if (!view->presentation) {
4441                 gint current_page;
4442
4443                 current_page = ev_document_model_get_page (view->model);
4444                 ev_document_misc_paint_one_page (view->layout.bin_window,
4445                                                  GTK_WIDGET (view),
4446                                                  page_area, border,
4447                                                  page == current_page);
4448         }
4449
4450         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4451                 gint             width, height;
4452                 gint             page_width, page_height;
4453                 cairo_surface_t *page_surface = NULL;
4454                 gint             selection_width, selection_height;
4455                 cairo_surface_t *selection_surface = NULL;
4456
4457                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4458
4459                 if (!page_surface) {
4460                         if (!view->presentation) {
4461                                 draw_loading_text (view,
4462                                                    &real_page_area,
4463                                                    expose_area);
4464                         }
4465
4466                         *page_ready = FALSE;
4467
4468                         return;
4469                 }
4470
4471                 ev_view_get_page_size (view, page, &width, &height);
4472
4473                 page_width = cairo_image_surface_get_width (page_surface);
4474                 page_height = cairo_image_surface_get_height (page_surface);
4475
4476                 cairo_save (cr);
4477                 cairo_translate (cr, overlap.x, overlap.y);
4478
4479                 if (width != page_width || height != page_height) {
4480                         cairo_pattern_set_filter (cairo_get_source (cr),
4481                                                   CAIRO_FILTER_FAST);
4482                         cairo_scale (cr,
4483                                      (gdouble)width / page_width,
4484                                      (gdouble)height / page_height);
4485                 }
4486
4487                 cairo_surface_set_device_offset (page_surface,
4488                                                  overlap.x - real_page_area.x,
4489                                                  overlap.y - real_page_area.y);
4490                 cairo_set_source_surface (cr, page_surface, 0, 0);
4491                 cairo_paint (cr);
4492                 cairo_restore (cr);
4493
4494                 /* Get the selection pixbuf iff we have something to draw */
4495                 if (find_selection_for_page (view, page) &&
4496                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4497                         selection_surface =
4498                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4499                                                                        page,
4500                                                                        view->scale,
4501                                                                        NULL);
4502                 }
4503
4504                 if (!selection_surface) {
4505                         return;
4506                 }
4507
4508                 selection_width = cairo_image_surface_get_width (selection_surface);
4509                 selection_height = cairo_image_surface_get_height (selection_surface);
4510
4511                 cairo_save (cr);
4512                 cairo_translate (cr, overlap.x, overlap.y);
4513
4514                 if (width != selection_width || height != selection_height) {
4515                         cairo_pattern_set_filter (cairo_get_source (cr),
4516                                                   CAIRO_FILTER_FAST);
4517                         cairo_scale (cr,
4518                                      (gdouble)width / selection_width,
4519                                      (gdouble)height / selection_height);
4520                 }
4521
4522                 cairo_surface_set_device_offset (selection_surface,
4523                                                  overlap.x - real_page_area.x,
4524                                                  overlap.y - real_page_area.y);
4525                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4526                 cairo_paint (cr);
4527                 cairo_restore (cr);
4528         }
4529 }
4530
4531 /*** GObject functions ***/
4532
4533 static void
4534 ev_view_finalize (GObject *object)
4535 {
4536         EvView *view = EV_VIEW (object);
4537
4538         clear_selection (view);
4539         clear_link_selected (view);
4540
4541         if (view->image_dnd_info.image)
4542                 g_object_unref (view->image_dnd_info.image);
4543         view->image_dnd_info.image = NULL;
4544
4545         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4546 }
4547
4548 static void
4549 ev_view_destroy (GtkObject *object)
4550 {
4551         EvView *view = EV_VIEW (object);
4552
4553         if (view->model) {
4554                 g_object_unref (view->model);
4555                 view->model = NULL;
4556         }
4557
4558         if (view->document) {
4559                 g_object_unref (view->document);
4560                 view->document = NULL;
4561         }
4562
4563         if (view->pixbuf_cache) {
4564                 g_object_unref (view->pixbuf_cache);
4565                 view->pixbuf_cache = NULL;
4566         }
4567
4568         if (view->goto_window) {
4569                 gtk_widget_destroy (view->goto_window);
4570                 view->goto_window = NULL;
4571                 view->goto_entry = NULL;
4572         }
4573
4574         ev_view_window_children_free (view);
4575
4576         if (view->selection_scroll_id) {
4577             g_source_remove (view->selection_scroll_id);
4578             view->selection_scroll_id = 0;
4579         }
4580
4581         if (view->selection_update_id) {
4582             g_source_remove (view->selection_update_id);
4583             view->selection_update_id = 0;
4584         }
4585
4586         if (view->loading_text) {
4587                 cairo_surface_destroy (view->loading_text);
4588                 view->loading_text = NULL;
4589         }
4590
4591         if (view->scroll_info.timeout_id) {
4592             g_source_remove (view->scroll_info.timeout_id);
4593             view->scroll_info.timeout_id = 0;
4594         }
4595
4596         if (view->drag_info.drag_timeout_id) {
4597                 g_source_remove (view->drag_info.drag_timeout_id);
4598                 view->drag_info.drag_timeout_id = 0;
4599         }
4600
4601         if (view->drag_info.release_timeout_id) {
4602                 g_source_remove (view->drag_info.release_timeout_id);
4603                 view->drag_info.release_timeout_id = 0;
4604         }
4605
4606         ev_view_presentation_transition_stop (view);
4607
4608         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4609
4610         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4611 }
4612
4613 static void
4614 ev_view_set_property (GObject      *object,
4615                       guint         prop_id,
4616                       const GValue *value,
4617                       GParamSpec   *pspec)
4618 {
4619         EvView *view = EV_VIEW (object);
4620
4621         switch (prop_id) {
4622                 case PROP_CONTINUOUS:
4623                         ev_view_set_continuous (view, g_value_get_boolean (value));
4624                         break;
4625                 case PROP_DUAL_PAGE:
4626                         ev_view_set_dual_page (view, g_value_get_boolean (value));
4627                         break;
4628                 case PROP_FULLSCREEN:
4629                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
4630                         break;
4631                 case PROP_PRESENTATION:
4632                         ev_view_set_presentation (view, g_value_get_boolean (value));
4633                         break;
4634                 case PROP_SIZING_MODE:
4635                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
4636                         break;
4637                 case PROP_ZOOM:
4638                         ev_view_set_zoom (view, g_value_get_double (value));
4639                         break;
4640                 case PROP_ROTATION:
4641                         ev_view_set_rotation (view, g_value_get_int (value));
4642                         break;
4643                 default:
4644                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4645         }
4646 }
4647
4648 static AtkObject *
4649 ev_view_get_accessible (GtkWidget *widget)
4650 {
4651         static gboolean first_time = TRUE;
4652
4653         if (first_time) {
4654                 AtkObjectFactory *factory;
4655                 AtkRegistry *registry;
4656                 GType derived_type;
4657                 GType derived_atk_type;
4658
4659                 /*
4660                  * Figure out whether accessibility is enabled by looking at the
4661                  * type of the accessible object which would be created for
4662                  * the parent type of EvView.
4663                  */
4664                 derived_type = g_type_parent (EV_TYPE_VIEW);
4665
4666                 registry = atk_get_default_registry ();
4667                 factory = atk_registry_get_factory (registry,
4668                                                     derived_type);
4669                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4670                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4671                         atk_registry_set_factory_type (registry,
4672                                                        EV_TYPE_VIEW,
4673                                                        ev_view_accessible_factory_get_type ());
4674                 first_time = FALSE;
4675         }
4676         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4677 }
4678
4679 static void
4680 ev_view_get_property (GObject *object,
4681                       guint prop_id,
4682                       GValue *value,
4683                       GParamSpec *pspec)
4684 {
4685         EvView *view = EV_VIEW (object);
4686
4687         switch (prop_id) {
4688                 case PROP_CONTINUOUS:
4689                         g_value_set_boolean (value, view->continuous);
4690                         break;
4691                 case PROP_DUAL_PAGE:
4692                         g_value_set_boolean (value, view->dual_page);
4693                         break;
4694                 case PROP_FULLSCREEN:
4695                         g_value_set_boolean (value, view->fullscreen);
4696                         break;
4697                 case PROP_PRESENTATION:
4698                         g_value_set_boolean (value, view->presentation);
4699                         break;
4700                 case PROP_SIZING_MODE:
4701                         g_value_set_enum (value, view->sizing_mode);
4702                         break;
4703                 case PROP_ZOOM:
4704                         g_value_set_double (value, view->scale);
4705                         break;
4706                 case PROP_ROTATION:
4707                         g_value_set_int (value, view->rotation);
4708                         break;
4709                 case PROP_HAS_SELECTION:
4710                         g_value_set_boolean (value,
4711                                              view->selection_info.selections != NULL);
4712                         break;
4713                 default:
4714                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4715         }
4716 }
4717
4718 static void
4719 ev_view_class_init (EvViewClass *class)
4720 {
4721         GObjectClass *object_class = G_OBJECT_CLASS (class);
4722         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4723         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4724         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4725         GtkBindingSet *binding_set;
4726
4727         object_class->finalize = ev_view_finalize;
4728         object_class->set_property = ev_view_set_property;
4729         object_class->get_property = ev_view_get_property;
4730
4731         widget_class->expose_event = ev_view_expose_event;
4732         widget_class->button_press_event = ev_view_button_press_event;
4733         widget_class->motion_notify_event = ev_view_motion_notify_event;
4734         widget_class->button_release_event = ev_view_button_release_event;
4735         widget_class->key_press_event = ev_view_key_press_event;
4736         widget_class->focus_in_event = ev_view_focus_in;
4737         widget_class->focus_out_event = ev_view_focus_out;
4738         widget_class->get_accessible = ev_view_get_accessible;
4739         widget_class->size_request = ev_view_size_request;
4740         widget_class->size_allocate = ev_view_size_allocate;
4741         widget_class->realize = ev_view_realize;
4742         widget_class->scroll_event = ev_view_scroll_event;
4743         widget_class->enter_notify_event = ev_view_enter_notify_event;
4744         widget_class->leave_notify_event = ev_view_leave_notify_event;
4745         widget_class->style_set = ev_view_style_set;
4746         widget_class->drag_data_get = ev_view_drag_data_get;
4747         widget_class->drag_motion = ev_view_drag_motion;
4748         widget_class->popup_menu = ev_view_popup_menu;
4749         widget_class->query_tooltip = ev_view_query_tooltip;
4750
4751         gtk_object_class->destroy = ev_view_destroy;
4752
4753         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4754
4755         class->binding_activated = ev_view_scroll;
4756
4757         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4758                          G_TYPE_FROM_CLASS (object_class),
4759                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4760                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4761                          NULL, NULL,
4762                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4763                          G_TYPE_NONE, 2,
4764                          GTK_TYPE_SCROLL_TYPE,
4765                          G_TYPE_BOOLEAN);
4766         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4767                          G_TYPE_FROM_CLASS (object_class),
4768                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4769                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4770                          NULL, NULL,
4771                          g_cclosure_marshal_VOID__OBJECT,
4772                          G_TYPE_NONE, 1,
4773                          G_TYPE_OBJECT);
4774         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4775                          G_TYPE_FROM_CLASS (object_class),
4776                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4777                          G_STRUCT_OFFSET (EvViewClass, external_link),
4778                          NULL, NULL,
4779                          g_cclosure_marshal_VOID__OBJECT,
4780                          G_TYPE_NONE, 1,
4781                          G_TYPE_OBJECT);
4782         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4783                          G_TYPE_FROM_CLASS (object_class),
4784                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4785                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4786                          NULL, NULL,
4787                          g_cclosure_marshal_VOID__OBJECT,
4788                          G_TYPE_NONE, 1,
4789                          G_TYPE_OBJECT);
4790
4791
4792         g_object_class_install_property (object_class,
4793                                          PROP_CONTINUOUS,
4794                                          g_param_spec_boolean ("continuous",
4795                                                                "Continuous",
4796                                                                "Continuous scrolling mode",
4797                                                                TRUE,
4798                                                                G_PARAM_READWRITE));
4799
4800         g_object_class_install_property (object_class,
4801                                          PROP_DUAL_PAGE,
4802                                          g_param_spec_boolean ("dual-page",
4803                                                                "Dual Page",
4804                                                                "Two pages visible at once",
4805                                                                FALSE,
4806                                                                G_PARAM_READWRITE));
4807         g_object_class_install_property (object_class,
4808                                          PROP_FULLSCREEN,
4809                                          g_param_spec_boolean ("fullscreen",
4810                                                                "Full Screen",
4811                                                                "Draw page in a fullscreen fashion",
4812                                                                FALSE,
4813                                                                G_PARAM_READWRITE));
4814         g_object_class_install_property (object_class,
4815                                          PROP_PRESENTATION,
4816                                          g_param_spec_boolean ("presentation",
4817                                                                "Presentation",
4818                                                                "Draw page in presentation mode",
4819                                                                TRUE,
4820                                                                G_PARAM_READWRITE));
4821
4822         g_object_class_install_property (object_class,
4823                                          PROP_SIZING_MODE,
4824                                          g_param_spec_enum ("sizing-mode",
4825                                                             "Sizing Mode",
4826                                                             "Sizing Mode",
4827                                                             EV_TYPE_SIZING_MODE,
4828                                                             EV_SIZING_FIT_WIDTH,
4829                                                             G_PARAM_READWRITE));
4830
4831         g_object_class_install_property (object_class,
4832                                          PROP_ZOOM,
4833                                          g_param_spec_double ("zoom",
4834                                                               "Zoom factor",
4835                                                               "Zoom factor",
4836                                                               0,
4837                                                               G_MAXDOUBLE,
4838                                                               1.0,
4839                                                               G_PARAM_READWRITE));
4840         g_object_class_install_property (object_class,
4841                                          PROP_ROTATION,
4842                                          g_param_spec_double ("rotation",
4843                                                               "Rotation",
4844                                                               "Rotation",
4845                                                               0,
4846                                                               360,
4847                                                               0,
4848                                                               G_PARAM_READWRITE));
4849
4850         g_object_class_install_property (object_class,
4851                                          PROP_HAS_SELECTION,
4852                                          g_param_spec_boolean ("has-selection",
4853                                                                "Has selection",
4854                                                                "The view has selections",
4855                                                                FALSE,
4856                                                                G_PARAM_READABLE));
4857
4858         binding_set = gtk_binding_set_by_class (class);
4859
4860         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4861         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4862         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4863         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4864         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4865         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4866         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4867         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4868         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4869                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4870         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4871                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4872         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4873                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4874         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4875                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4876
4877 }
4878
4879 static void
4880 ev_view_init (EvView *view)
4881 {
4882         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4883
4884         view->start_page = -1;
4885         view->end_page = -1;
4886         view->spacing = 5;
4887         view->scale = 1.0;
4888         view->current_page = 0;
4889         view->pressed_button = -1;
4890         view->cursor = EV_VIEW_CURSOR_NORMAL;
4891         view->drag_info.in_drag = FALSE;
4892         view->scroll_info.autoscrolling = FALSE;
4893         view->selection_info.selections = NULL;
4894         view->selection_info.in_selection = FALSE;
4895         view->selection_info.in_drag = FALSE;
4896         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4897         view->continuous = TRUE;
4898         view->dual_page = FALSE;
4899         view->presentation = FALSE;
4900         view->presentation_state = EV_PRESENTATION_NORMAL;
4901         view->fullscreen = FALSE;
4902         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4903         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4904         view->jump_to_find_result = TRUE;
4905         view->highlight_find_results = FALSE;
4906
4907         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4908         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4909 }
4910
4911 /*** Callbacks ***/
4912
4913 static void
4914 ev_view_change_page (EvView *view,
4915                      gint    new_page,
4916                      gboolean start_transition)
4917 {
4918         gint x, y;
4919
4920         view->current_page = new_page;
4921         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4922
4923         if (view->presentation && start_transition)
4924                 ev_view_presentation_transition_start (view);
4925
4926         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4927         ev_view_handle_cursor_over_xy (view, x, y);
4928
4929         gtk_widget_queue_resize (GTK_WIDGET (view));
4930 }
4931
4932 static void
4933 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4934                                      EvView                *view)
4935 {
4936         g_object_unref (view->animation);
4937         view->animation = NULL;
4938         ev_view_change_page (view, view->current_page, TRUE);
4939 }
4940
4941 /**
4942  * ev_view_transition_animation_cancel:
4943  * @animation: Animation to finish
4944  * @view: An EvView
4945  *
4946  * Does almost the same as cancel, but without scheduling the transition.
4947  */
4948
4949 static void
4950 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4951                                      EvView                *view)
4952 {
4953         g_object_unref (view->animation);
4954         view->animation = NULL;
4955         ev_view_change_page (view, view->current_page, FALSE);
4956 }
4957
4958 static void
4959 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4960                                     gdouble                progress,
4961                                     EvView                *view)
4962 {
4963         gtk_widget_queue_draw (GTK_WIDGET (view));
4964 }
4965
4966 static void
4967 ev_view_presentation_animation_start (EvView *view,
4968                                       int     new_page)
4969 {
4970         EvTransitionEffect *effect = NULL;
4971         cairo_surface_t *surface;
4972
4973         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4974                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4975                                                             view->current_page);
4976         if (!effect)
4977                 return;
4978
4979         view->animation = ev_transition_animation_new (effect);
4980
4981         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4982         ev_transition_animation_set_origin_surface (view->animation, surface);
4983         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, new_page);
4984         if (surface)
4985                 ev_transition_animation_set_dest_surface (view->animation, surface);
4986
4987         g_signal_connect (view->animation, "frame",
4988                           G_CALLBACK (ev_view_transition_animation_frame), view);
4989         g_signal_connect (view->animation, "finished",
4990                           G_CALLBACK (ev_view_transition_animation_finish), view);
4991 }
4992
4993 static void
4994 job_finished_cb (EvPixbufCache *pixbuf_cache,
4995                  GdkRegion     *region,
4996                  EvView        *view)
4997 {
4998         if (view->animation) {
4999                 cairo_surface_t *surface;
5000
5001                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
5002                 ev_transition_animation_set_dest_surface (view->animation, surface);
5003         }
5004
5005         if (region) {
5006                 gdk_window_invalidate_region (view->layout.bin_window,
5007                                               region, TRUE);
5008         } else {
5009                 gtk_widget_queue_draw (GTK_WIDGET (view));
5010         }
5011 }
5012
5013 static void
5014 ev_view_page_changed_cb (EvDocumentModel *model,
5015                          gint             old_page,
5016                          gint             new_page,
5017                          EvView          *view)
5018 {
5019         if (!view->document)
5020                 return;
5021
5022         if (view->current_page != new_page) {
5023                 if (view->presentation)
5024                         ev_view_presentation_animation_start (view, new_page);
5025
5026                 ev_view_change_page (view, new_page, TRUE);
5027         } else {
5028                 gtk_widget_queue_draw (GTK_WIDGET (view));
5029         }
5030
5031         view->find_result = 0;
5032 }
5033
5034 static void
5035 on_adjustment_value_changed (GtkAdjustment *adjustment,
5036                              EvView        *view)
5037 {
5038         int dx = 0, dy = 0;
5039         gint x, y;
5040         GList *children, *l;
5041
5042         if (! GTK_WIDGET_REALIZED (view))
5043                 return;
5044
5045         if (view->hadjustment) {
5046                 dx = view->scroll_x - (int) view->hadjustment->value;
5047                 view->scroll_x = (int) view->hadjustment->value;
5048         } else {
5049                 view->scroll_x = 0;
5050         }
5051
5052         if (view->vadjustment) {
5053                 dy = view->scroll_y - (int) view->vadjustment->value;
5054                 view->scroll_y = (int) view->vadjustment->value;
5055         } else {
5056                 view->scroll_y = 0;
5057         }
5058
5059         children = gtk_container_get_children (GTK_CONTAINER (view));
5060         for (l = children; l && l->data; l = g_list_next (l)) {
5061                 gint       child_x, child_y;
5062                 GtkWidget *child = (GtkWidget *)l->data;
5063
5064                 gtk_container_child_get (GTK_CONTAINER (view),
5065                                          child,
5066                                          "x", &child_x,
5067                                          "y", &child_y,
5068                                          NULL);
5069                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
5070         }
5071         g_list_free (children);
5072
5073         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
5074                 EvViewWindowChild *child;
5075
5076                 child = (EvViewWindowChild *)l->data;
5077
5078                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
5079         }
5080
5081         if (view->pending_resize)
5082                 gtk_widget_queue_draw (GTK_WIDGET (view));
5083         else
5084                 gdk_window_scroll (view->layout.bin_window, dx, dy);
5085
5086         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5087         ev_view_handle_cursor_over_xy (view, x, y);
5088
5089         if (view->document)
5090                 view_update_range_and_current_page (view);
5091 }
5092
5093 GtkWidget*
5094 ev_view_new (void)
5095 {
5096         GtkWidget *view;
5097
5098         view = g_object_new (EV_TYPE_VIEW, NULL);
5099
5100         return view;
5101 }
5102
5103 static void
5104 setup_caches (EvView *view)
5105 {
5106         gboolean inverted_colors;
5107
5108         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
5109         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
5110         inverted_colors = ev_document_model_get_inverted_colors (view->model);
5111         ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
5112         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
5113 }
5114
5115 static void
5116 clear_caches (EvView *view)
5117 {
5118         if (view->pixbuf_cache) {
5119                 g_object_unref (view->pixbuf_cache);
5120                 view->pixbuf_cache = NULL;
5121         }
5122 }
5123
5124 void
5125 ev_view_set_loading (EvView       *view,
5126                      gboolean      loading)
5127 {
5128         view->loading = loading;
5129         gtk_widget_queue_draw (GTK_WIDGET (view));
5130 }
5131
5132 static gboolean
5133 ev_view_autoscroll_cb (EvView *view)
5134 {
5135         gdouble speed, value;
5136
5137         /* If the user stops autoscrolling, autoscrolling will be
5138          * set to false but the timeout will continue; stop the timeout: */
5139         if (!view->scroll_info.autoscrolling) {
5140                 view->scroll_info.timeout_id = 0;
5141                 return FALSE;
5142         }
5143
5144         if (view->scroll_info.last_y > view->scroll_info.start_y &&
5145                 (view->scroll_info.last_y < view->scroll_info.start_y))
5146                 return TRUE;
5147
5148         /* Replace 100 with your speed of choice: The lower the faster.
5149          * Replace 3 with another speed of choice: The higher, the faster it accelerated
5150          *      based on the distance of the starting point from the mouse
5151          * (All also effected by the timeout interval of this callback) */
5152
5153         if (view->scroll_info.start_y > view->scroll_info.last_y)
5154                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
5155         else
5156                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
5157
5158         value = gtk_adjustment_get_value (view->vadjustment);
5159         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
5160         gtk_adjustment_set_value (view->vadjustment, value);
5161
5162         return TRUE;
5163
5164 }
5165
5166 void
5167 ev_view_autoscroll_start (EvView *view)
5168 {
5169         gint x, y;
5170
5171         g_return_if_fail (EV_IS_VIEW (view));
5172
5173         if (view->scroll_info.autoscrolling)
5174                 return;
5175
5176         view->scroll_info.autoscrolling = TRUE;
5177         view->scroll_info.timeout_id =
5178                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5179                                view);
5180
5181         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5182         ev_view_handle_cursor_over_xy (view, x, y);
5183 }
5184
5185 void
5186 ev_view_autoscroll_stop (EvView *view)
5187 {
5188         gint x, y;
5189
5190         g_return_if_fail (EV_IS_VIEW (view));
5191
5192         if (!view->scroll_info.autoscrolling)
5193                 return;
5194
5195         view->scroll_info.autoscrolling = FALSE;
5196         if (view->scroll_info.timeout_id) {
5197                 g_source_remove (view->scroll_info.timeout_id);
5198                 view->scroll_info.timeout_id = 0;
5199         }
5200
5201         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5202         ev_view_handle_cursor_over_xy (view, x, y);
5203 }
5204
5205 static void
5206 ev_view_document_changed_cb (EvDocumentModel *model,
5207                              GParamSpec      *pspec,
5208                              EvView          *view)
5209 {
5210         EvDocument *document = ev_document_model_get_document (model);
5211
5212         view->loading = FALSE;
5213
5214         if (document != view->document) {
5215                 gint current_page;
5216
5217                 clear_caches (view);
5218
5219                 if (view->document) {
5220                         g_object_unref (view->document);
5221                 }
5222
5223                 view->document = document;
5224                 view->find_result = 0;
5225
5226                 if (view->document) {
5227                         g_object_ref (view->document);
5228                         setup_caches (view);
5229                 }
5230
5231                 current_page = ev_document_model_get_page (model);
5232                 if (view->current_page != current_page) {
5233                         ev_view_change_page (view, current_page, TRUE);
5234                 } else {
5235                         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
5236                         gtk_widget_queue_resize (GTK_WIDGET (view));
5237                 }
5238         }
5239 }
5240
5241 static void
5242 ev_view_rotation_changed_cb (EvDocumentModel *model,
5243                              GParamSpec      *pspec,
5244                              EvView          *view)
5245 {
5246         gint rotation = ev_document_model_get_rotation (model);
5247
5248         ev_view_set_rotation (view, rotation);
5249
5250         if (view->pixbuf_cache) {
5251                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5252                 if (!ev_document_is_page_size_uniform (view->document))
5253                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5254                 gtk_widget_queue_resize (GTK_WIDGET (view));
5255         }
5256
5257         ev_view_remove_all (view);
5258
5259         if (rotation != 0)
5260                 clear_selection (view);
5261 }
5262
5263 static void
5264 ev_view_inverted_colors_changed_cb (EvDocumentModel *model,
5265                                     GParamSpec      *pspec,
5266                                     EvView          *view)
5267 {
5268         if (view->pixbuf_cache) {
5269                 gboolean inverted_colors;
5270
5271                 inverted_colors = ev_document_model_get_inverted_colors (model);
5272                 ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
5273                 gtk_widget_queue_draw (GTK_WIDGET (view));
5274         }
5275 }
5276
5277 static void
5278 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
5279                                 GParamSpec      *pspec,
5280                                 EvView          *view)
5281 {
5282         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
5283
5284         ev_view_set_sizing_mode (view, mode);
5285
5286         if (mode != EV_SIZING_FREE)
5287                 gtk_widget_queue_resize (GTK_WIDGET (view));
5288 }
5289
5290 #define EPSILON 0.0000001
5291 static void
5292 ev_view_scale_changed_cb (EvDocumentModel *model,
5293                           GParamSpec      *pspec,
5294                           EvView          *view)
5295 {
5296         gdouble scale = ev_document_model_get_scale (model);
5297
5298         if (ABS (view->scale - scale) < EPSILON)
5299                 return;
5300
5301         if (view->loading_text) {
5302                 cairo_surface_destroy (view->loading_text);
5303                 view->loading_text = NULL;
5304         }
5305
5306         ev_view_set_zoom (view, scale);
5307
5308         view->pending_resize = TRUE;
5309         if (view->sizing_mode == EV_SIZING_FREE)
5310                 gtk_widget_queue_resize (GTK_WIDGET (view));
5311 }
5312
5313 static void
5314 ev_view_continuous_changed_cb (EvDocumentModel *model,
5315                                GParamSpec      *pspec,
5316                                EvView          *view)
5317 {
5318         gboolean continuous = ev_document_model_get_continuous (model);
5319
5320         ev_view_set_continuous (view, continuous);
5321         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5322         gtk_widget_queue_resize (GTK_WIDGET (view));
5323 }
5324
5325 static void
5326 ev_view_dual_page_changed_cb (EvDocumentModel *model,
5327                               GParamSpec      *pspec,
5328                               EvView          *view)
5329 {
5330         gboolean dual_page = ev_document_model_get_dual_page (model);
5331
5332         ev_view_set_dual_page (view, dual_page);
5333         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5334         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5335          * preload_cache_size to be 2 if dual_page is set.
5336          */
5337         gtk_widget_queue_resize (GTK_WIDGET (view));
5338 }
5339
5340 static void
5341 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
5342                                GParamSpec      *pspec,
5343                                EvView          *view)
5344 {
5345         gboolean fullscreen = ev_document_model_get_fullscreen (model);
5346
5347         ev_view_set_fullscreen (view, fullscreen);
5348         gtk_widget_queue_resize (GTK_WIDGET (view));
5349 }
5350
5351 void
5352 ev_view_set_model (EvView          *view,
5353                    EvDocumentModel *model)
5354 {
5355         g_return_if_fail (EV_IS_VIEW (view));
5356         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
5357
5358         if (model == view->model)
5359                 return;
5360
5361         if (view->model) {
5362                 g_signal_handlers_disconnect_by_func (view->model,
5363                                                       ev_view_document_changed_cb,
5364                                                       view);
5365                 g_signal_handlers_disconnect_by_func (view->model,
5366                                                       ev_view_page_changed_cb,
5367                                                       view);
5368                 g_object_unref (view->model);
5369         }
5370         view->model = g_object_ref (model);
5371         g_signal_connect (view->model, "notify::document",
5372                           G_CALLBACK (ev_view_document_changed_cb),
5373                           view);
5374         g_signal_connect (view->model, "notify::rotation",
5375                           G_CALLBACK (ev_view_rotation_changed_cb),
5376                           view);
5377         g_signal_connect (view->model, "notify::inverted-colors",
5378                           G_CALLBACK (ev_view_inverted_colors_changed_cb),
5379                           view);
5380         g_signal_connect (view->model, "notify::sizing-mode",
5381                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
5382                           view);
5383         g_signal_connect (view->model, "notify::scale",
5384                           G_CALLBACK (ev_view_scale_changed_cb),
5385                           view);
5386         g_signal_connect (view->model, "notify::continuous",
5387                           G_CALLBACK (ev_view_continuous_changed_cb),
5388                           view);
5389         g_signal_connect (view->model, "notify::dual-page",
5390                           G_CALLBACK (ev_view_dual_page_changed_cb),
5391                           view);
5392         g_signal_connect (view->model, "notify::fullscreen",
5393                           G_CALLBACK (ev_view_fullscreen_changed_cb),
5394                           view);
5395         g_signal_connect (view->model, "page-changed",
5396                           G_CALLBACK (ev_view_page_changed_cb),
5397                           view);
5398 }
5399
5400 static void
5401 ev_view_reload_page (EvView    *view,
5402                      gint       page,
5403                      GdkRegion *region)
5404 {
5405         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5406                                      region,
5407                                      page,
5408                                      view->rotation,
5409                                      view->scale);
5410 }
5411
5412 void
5413 ev_view_reload (EvView *view)
5414 {
5415         ev_pixbuf_cache_clear (view->pixbuf_cache);
5416         view_update_range_and_current_page (view);
5417 }
5418
5419 /*** Zoom and sizing mode ***/
5420
5421 void
5422 ev_view_set_zoom (EvView   *view,
5423                   double    scale)
5424 {
5425         view->scale = scale;
5426
5427         g_object_notify (G_OBJECT (view), "zoom");
5428 }
5429
5430 double
5431 ev_view_get_zoom (EvView *view)
5432 {
5433         return view->scale;
5434 }
5435
5436 gboolean
5437 ev_view_get_continuous (EvView *view)
5438 {
5439         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5440
5441         return view->continuous;
5442 }
5443
5444 void
5445 ev_view_set_continuous (EvView   *view,
5446                         gboolean  continuous)
5447 {
5448         g_return_if_fail (EV_IS_VIEW (view));
5449
5450         view->continuous = continuous;
5451
5452         g_object_notify (G_OBJECT (view), "continuous");
5453 }
5454
5455 gboolean
5456 ev_view_get_dual_page (EvView *view)
5457 {
5458         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5459
5460         return view->dual_page;
5461 }
5462
5463 void
5464 ev_view_set_dual_page (EvView   *view,
5465                        gboolean  dual_page)
5466 {
5467         g_return_if_fail (EV_IS_VIEW (view));
5468
5469         view->dual_page = dual_page;
5470
5471         g_object_notify (G_OBJECT (view), "dual-page");
5472 }
5473
5474 void
5475 ev_view_set_fullscreen (EvView   *view,
5476                          gboolean  fullscreen)
5477 {
5478         g_return_if_fail (EV_IS_VIEW (view));
5479
5480         view->fullscreen = fullscreen;
5481
5482         g_object_notify (G_OBJECT (view), "fullscreen");
5483 }
5484
5485 gboolean
5486 ev_view_get_fullscreen (EvView *view)
5487 {
5488         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5489
5490         return view->fullscreen;
5491 }
5492
5493 void
5494 ev_view_set_presentation (EvView   *view,
5495                           gboolean  presentation)
5496 {
5497         g_return_if_fail (EV_IS_VIEW (view));
5498
5499         presentation = presentation != FALSE;
5500
5501         if (view->presentation == presentation)
5502                 return;
5503
5504         if (!presentation)
5505                 view->presentation_state = EV_PRESENTATION_NORMAL;
5506
5507         view->presentation = presentation;
5508         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5509
5510         if (presentation) {
5511                 view->sizing_mode_saved = view->sizing_mode;
5512                 view->scale_saved = view->scale;
5513                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
5514         } else {
5515                 ev_document_model_set_sizing_mode (view->model, view->sizing_mode_saved);
5516                 ev_document_model_set_scale (view->model, view->scale_saved);
5517         }
5518
5519         gtk_widget_queue_resize (GTK_WIDGET (view));
5520
5521         if (presentation)
5522                 ev_view_presentation_transition_start (view);
5523         else {
5524                 ev_view_presentation_transition_stop (view);
5525
5526                 if (view->animation) {
5527                         /* stop any running animation */
5528                         ev_view_transition_animation_cancel (view->animation, view);
5529                 }
5530         }
5531
5532         if (GTK_WIDGET_REALIZED (view)) {
5533                 if (view->presentation)
5534                         gdk_window_set_background (view->layout.bin_window,
5535                                                    &GTK_WIDGET (view)->style->black);
5536                 else
5537                         gdk_window_set_background (view->layout.bin_window,
5538                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
5539         }
5540
5541         g_object_notify (G_OBJECT (view), "presentation");
5542 }
5543
5544 gboolean
5545 ev_view_get_presentation (EvView *view)
5546 {
5547         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5548
5549         return view->presentation;
5550 }
5551
5552 static gboolean
5553 transition_next_page (EvView *view)
5554 {
5555         ev_view_next_page (view);
5556
5557         return FALSE;
5558 }
5559
5560 static void
5561 ev_view_presentation_transition_stop (EvView *view)
5562 {
5563         if (view->trans_timeout_id > 0)
5564                 g_source_remove (view->trans_timeout_id);
5565         view->trans_timeout_id = 0;
5566 }
5567
5568 static void
5569 ev_view_presentation_transition_start (EvView *view)
5570 {
5571         gdouble duration;
5572
5573         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
5574                 return;
5575
5576         ev_view_presentation_transition_stop (view);
5577
5578         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
5579                                                              view->current_page);
5580         if (duration > 0) {
5581                 view->trans_timeout_id =
5582                         g_timeout_add_seconds (duration,
5583                                                (GSourceFunc) transition_next_page,
5584                                                view);
5585         }
5586 }
5587
5588 void
5589 ev_view_set_sizing_mode (EvView       *view,
5590                          EvSizingMode  sizing_mode)
5591 {
5592         view->sizing_mode = sizing_mode;
5593
5594         g_object_notify (G_OBJECT (view), "sizing-mode");
5595 }
5596
5597 EvSizingMode
5598 ev_view_get_sizing_mode (EvView *view)
5599 {
5600         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
5601
5602         return view->sizing_mode;
5603 }
5604
5605 gboolean
5606 ev_view_can_zoom_in (EvView *view)
5607 {
5608         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
5609 }
5610
5611 gboolean
5612 ev_view_can_zoom_out (EvView *view)
5613 {
5614         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
5615 }
5616
5617 void
5618 ev_view_zoom_in (EvView *view)
5619 {
5620         gdouble scale;
5621
5622         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5623
5624         if (view->presentation)
5625                 return;
5626
5627         view->pending_scroll = SCROLL_TO_CENTER;
5628         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
5629         ev_document_model_set_scale (view->model, scale);
5630 }
5631
5632 void
5633 ev_view_zoom_out (EvView *view)
5634 {
5635         gdouble scale;
5636
5637         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5638
5639         if (view->presentation)
5640                 return;
5641
5642         view->pending_scroll = SCROLL_TO_CENTER;
5643         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5644         ev_document_model_set_scale (view->model, scale);
5645 }
5646
5647 void
5648 ev_view_set_rotation (EvView *view, int rotation)
5649 {
5650         view->rotation = rotation;
5651
5652         g_object_notify (G_OBJECT (view), "rotation");
5653 }
5654
5655 int
5656 ev_view_get_rotation (EvView *view)
5657 {
5658         return view->rotation;
5659 }
5660
5661 static double
5662 zoom_for_size_fit_width (gdouble doc_width,
5663                          gdouble doc_height,
5664                          int     target_width,
5665                          int     target_height)
5666 {
5667         return (double)target_width / doc_width;
5668 }
5669
5670 static double
5671 zoom_for_size_fit_height (gdouble doc_width,
5672                           gdouble doc_height,
5673                           int     target_width,
5674                           int     target_height)
5675 {
5676         return (double)target_height / doc_height;
5677 }
5678
5679 static double
5680 zoom_for_size_best_fit (gdouble doc_width,
5681                         gdouble doc_height,
5682                         int     target_width,
5683                         int     target_height)
5684 {
5685         double w_scale;
5686         double h_scale;
5687
5688         w_scale = (double)target_width / doc_width;
5689         h_scale = (double)target_height / doc_height;
5690
5691         return MIN (w_scale, h_scale);
5692 }
5693
5694
5695 static void
5696 ev_view_zoom_for_size_presentation (EvView *view,
5697                                     int     width,
5698                                     int     height)
5699 {
5700         gdouble doc_width, doc_height;
5701         gdouble scale;
5702
5703         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5704         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5705         ev_document_model_set_scale (view->model, scale);
5706 }
5707
5708 static void
5709 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5710                                                 int     width,
5711                                                 int     height)
5712 {
5713         gdouble doc_width, doc_height;
5714         GtkBorder border;
5715         gdouble scale;
5716
5717         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5718         if (view->rotation == 90 || view->rotation == 270) {
5719                 gdouble tmp;
5720
5721                 tmp = doc_width;
5722                 doc_width = doc_height;
5723                 doc_height = tmp;
5724         }
5725
5726         compute_border (view, doc_width, doc_height, &border);
5727
5728         doc_width *= 2;
5729         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5730         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5731
5732         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5733                 gint sb_size;
5734
5735                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5736                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5737         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5738                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5739         else
5740                 g_assert_not_reached ();
5741
5742         ev_document_model_set_scale (view->model, scale);
5743 }
5744
5745 static void
5746 ev_view_zoom_for_size_continuous (EvView *view,
5747                                   int     width,
5748                                   int     height)
5749 {
5750         gdouble doc_width, doc_height;
5751         GtkBorder border;
5752         gdouble scale;
5753
5754         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5755         if (view->rotation == 90 || view->rotation == 270) {
5756                 gdouble tmp;
5757
5758                 tmp = doc_width;
5759                 doc_width = doc_height;
5760                 doc_height = tmp;
5761         }
5762
5763         compute_border (view, doc_width, doc_height, &border);
5764
5765         width -= (border.left + border.right + 2 * view->spacing);
5766         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5767
5768         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5769                 gint sb_size;
5770
5771                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5772                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5773         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5774                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5775         else
5776                 g_assert_not_reached ();
5777
5778         ev_document_model_set_scale (view->model, scale);
5779 }
5780
5781 static void
5782 ev_view_zoom_for_size_dual_page (EvView *view,
5783                                  int     width,
5784                                  int     height)
5785 {
5786         GtkBorder border;
5787         gdouble doc_width, doc_height;
5788         gdouble scale;
5789         gint other_page;
5790
5791         other_page = view->current_page ^ 1;
5792
5793         /* Find the largest of the two. */
5794         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5795         if (other_page < ev_document_get_n_pages (view->document)) {
5796                 gdouble width_2, height_2;
5797
5798                 get_doc_page_size (view, other_page, &width_2, &height_2);
5799                 if (width_2 > doc_width)
5800                         doc_width = width_2;
5801                 if (height_2 > doc_height)
5802                         doc_height = height_2;
5803         }
5804         compute_border (view, width, height, &border);
5805
5806         doc_width = doc_width * 2;
5807         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5808         height -= (border.top + border.bottom + 2 * view->spacing);
5809
5810         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5811                 gint sb_size;
5812
5813                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5814                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5815         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5816                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5817         else
5818                 g_assert_not_reached ();
5819
5820         ev_document_model_set_scale (view->model, scale);
5821 }
5822
5823 static void
5824 ev_view_zoom_for_size_single_page (EvView *view,
5825                                    int     width,
5826                                    int     height)
5827 {
5828         gdouble doc_width, doc_height;
5829         GtkBorder border;
5830         gdouble scale;
5831
5832         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5833
5834         /* Get an approximate border */
5835         compute_border (view, width, height, &border);
5836
5837         width -= (border.left + border.right + 2 * view->spacing);
5838         height -= (border.top + border.bottom + 2 * view->spacing);
5839
5840         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5841                 gint sb_size;
5842
5843                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5844                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5845         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5846                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5847         else
5848                 g_assert_not_reached ();
5849
5850         ev_document_model_set_scale (view->model, scale);
5851 }
5852
5853 static void
5854 ev_view_zoom_for_size (EvView *view,
5855                        int     width,
5856                        int     height)
5857 {
5858         g_return_if_fail (EV_IS_VIEW (view));
5859         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5860                           view->sizing_mode == EV_SIZING_BEST_FIT);
5861         g_return_if_fail (width >= 0);
5862         g_return_if_fail (height >= 0);
5863
5864         if (view->document == NULL)
5865                 return;
5866
5867         if (view->presentation)
5868                 ev_view_zoom_for_size_presentation (view, width, height);
5869         else if (view->continuous && view->dual_page)
5870                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5871         else if (view->continuous)
5872                 ev_view_zoom_for_size_continuous (view, width, height);
5873         else if (view->dual_page)
5874                 ev_view_zoom_for_size_dual_page (view, width, height);
5875         else
5876                 ev_view_zoom_for_size_single_page (view, width, height);
5877 }
5878
5879 /*** Find ***/
5880 static gint
5881 ev_view_find_get_n_results (EvView *view, gint page)
5882 {
5883         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5884 }
5885
5886 static EvRectangle *
5887 ev_view_find_get_result (EvView *view, gint page, gint result)
5888 {
5889         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5890 }
5891
5892 static void
5893 jump_to_find_result (EvView *view)
5894 {
5895         gint n_results;
5896         gint page = view->current_page;
5897
5898         n_results = ev_view_find_get_n_results (view, page);
5899
5900         if (n_results > 0 && view->find_result < n_results) {
5901                 EvRectangle *rect;
5902                 GdkRectangle view_rect;
5903
5904                 rect = ev_view_find_get_result (view, page, view->find_result);
5905                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5906                 ensure_rectangle_is_visible (view, &view_rect);
5907                 view->jump_to_find_result = FALSE;
5908         }
5909 }
5910
5911 /**
5912  * jump_to_find_page
5913  * @view: #EvView instance
5914  * @direction: Direction to look
5915  * @shift: Shift from current page
5916  *
5917  * Jumps to the first page that has occurences of searched word.
5918  * Uses a direction where to look and a shift from current page.
5919  *
5920  */
5921 static void
5922 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5923 {
5924         int n_pages, i;
5925
5926         n_pages = ev_document_get_n_pages (view->document);
5927
5928         for (i = 0; i < n_pages; i++) {
5929                 int page;
5930
5931                 if (direction == EV_VIEW_FIND_NEXT)
5932                         page = view->current_page + i;
5933                 else
5934                         page = view->current_page - i;
5935                 page += shift;
5936
5937                 if (page >= n_pages) {
5938                         page = page - n_pages;
5939                 } else if (page < 0)
5940                         page = page + n_pages;
5941
5942                 if (ev_view_find_get_n_results (view, page) > 0) {
5943                         ev_document_model_set_page (view->model, page);
5944                         break;
5945                 }
5946         }
5947 }
5948
5949 void
5950 ev_view_find_changed (EvView *view, GList **results, gint page)
5951 {
5952         view->find_pages = results;
5953
5954         if (view->jump_to_find_result == TRUE) {
5955                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5956                 jump_to_find_result (view);
5957         }
5958
5959         if (view->current_page == page)
5960                 gtk_widget_queue_draw (GTK_WIDGET (view));
5961 }
5962
5963 void
5964 ev_view_find_next (EvView *view)
5965 {
5966         gint n_results;
5967
5968         n_results = ev_view_find_get_n_results (view, view->current_page);
5969         view->find_result++;
5970
5971         if (view->find_result >= n_results) {
5972                 view->find_result = 0;
5973                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5974                 jump_to_find_result (view);
5975         } else {
5976                 jump_to_find_result (view);
5977                 gtk_widget_queue_draw (GTK_WIDGET (view));
5978         }
5979 }
5980
5981 void
5982 ev_view_find_previous (EvView *view)
5983 {
5984         view->find_result--;
5985
5986         if (view->find_result < 0) {
5987                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5988                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5989                 jump_to_find_result (view);
5990         } else {
5991                 jump_to_find_result (view);
5992                 gtk_widget_queue_draw (GTK_WIDGET (view));
5993         }
5994 }
5995
5996 void
5997 ev_view_find_search_changed (EvView *view)
5998 {
5999         /* search string has changed, focus on new search result */
6000         view->jump_to_find_result = TRUE;
6001         view->find_pages = NULL;
6002 }
6003
6004 void
6005 ev_view_find_set_highlight_search (EvView *view, gboolean value)
6006 {
6007         view->highlight_find_results = value;
6008         gtk_widget_queue_draw (GTK_WIDGET (view));
6009 }
6010
6011 void
6012 ev_view_find_cancel (EvView *view)
6013 {
6014         view->find_pages = NULL;
6015 }
6016
6017 /*** Selections ***/
6018
6019 /* compute_new_selection_rect/text calculates the area currently selected by
6020  * view_rect.  each handles a different mode;
6021  */
6022 static GList *
6023 compute_new_selection_rect (EvView       *view,
6024                             GdkPoint     *start,
6025                             GdkPoint     *stop)
6026 {
6027         GdkRectangle view_rect;
6028         int n_pages, i;
6029         GList *list = NULL;
6030
6031         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
6032
6033         view_rect.x = MIN (start->x, stop->x);
6034         view_rect.y = MIN (start->y, stop->y);
6035         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
6036         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
6037
6038         n_pages = ev_document_get_n_pages (view->document);
6039
6040         for (i = 0; i < n_pages; i++) {
6041                 GdkRectangle page_area;
6042                 GtkBorder border;
6043
6044                 if (get_page_extents (view, i, &page_area, &border)) {
6045                         GdkRectangle overlap;
6046
6047                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
6048                                 EvViewSelection *selection;
6049
6050                                 selection = g_new0 (EvViewSelection, 1);
6051                                 selection->page = i;
6052                                 view_rect_to_doc_rect (view, &overlap, &page_area,
6053                                                        &(selection->rect));
6054
6055                                 list = g_list_append (list, selection);
6056                         }
6057                 }
6058         }
6059
6060         return list;
6061 }
6062
6063 static gboolean
6064 gdk_rectangle_point_in (GdkRectangle *rectangle,
6065                         GdkPoint     *point)
6066 {
6067         return rectangle->x <= point->x &&
6068                 rectangle->y <= point->y &&
6069                 point->x < rectangle->x + rectangle->width &&
6070                 point->y < rectangle->y + rectangle->height;
6071 }
6072
6073 static GList *
6074 compute_new_selection_text (EvView          *view,
6075                             EvSelectionStyle style,
6076                             GdkPoint        *start,
6077                             GdkPoint        *stop)
6078 {
6079         int n_pages, i, first, last;
6080         GList *list = NULL;
6081         EvViewSelection *selection;
6082         gdouble width, height;
6083         int start_page, end_page;
6084
6085         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
6086
6087         n_pages = ev_document_get_n_pages (view->document);
6088
6089         /* First figure out the range of pages the selection
6090          * affects. */
6091         first = n_pages;
6092         last = 0;
6093         if (view->continuous) {
6094                 start_page = 0;
6095                 end_page = n_pages;
6096         } else if (view->dual_page) {
6097                 start_page = view->start_page;
6098                 end_page = view->end_page + 1;
6099         } else {
6100                 start_page = view->current_page;
6101                 end_page = view->current_page + 1;
6102         }
6103
6104         for (i = start_page; i < end_page; i++) {
6105                 GdkRectangle page_area;
6106                 GtkBorder border;
6107
6108                 get_page_extents (view, i, &page_area, &border);
6109                 if (gdk_rectangle_point_in (&page_area, start) ||
6110                     gdk_rectangle_point_in (&page_area, stop)) {
6111                         if (first == n_pages)
6112                                 first = i;
6113                         last = i;
6114                 }
6115
6116         }
6117
6118         /* Now create a list of EvViewSelection's for the affected
6119          * pages.  This could be an empty list, a list of just one
6120          * page or a number of pages.*/
6121         for (i = first; i < last + 1; i++) {
6122                 GdkRectangle page_area;
6123                 GtkBorder border;
6124                 GdkPoint *point;
6125
6126                 get_doc_page_size (view, i, &width, &height);
6127
6128                 selection = g_new0 (EvViewSelection, 1);
6129                 selection->page = i;
6130                 selection->style = style;
6131                 selection->rect.x1 = selection->rect.y1 = 0;
6132                 selection->rect.x2 = width;
6133                 selection->rect.y2 = height;
6134
6135                 get_page_extents (view, i, &page_area, &border);
6136
6137                 if (gdk_rectangle_point_in (&page_area, start))
6138                         point = start;
6139                 else
6140                         point = stop;
6141
6142                 if (i == first)
6143                         view_point_to_doc_point (view, point, &page_area,
6144                                                  &selection->rect.x1,
6145                                                  &selection->rect.y1);
6146
6147                 /* If the selection is contained within just one page,
6148                  * make sure we don't write 'start' into both points
6149                  * in selection->rect. */
6150                 if (first == last)
6151                         point = stop;
6152
6153                 if (i == last)
6154                         view_point_to_doc_point (view, point, &page_area,
6155                                                  &selection->rect.x2,
6156                                                  &selection->rect.y2);
6157
6158                 list = g_list_append (list, selection);
6159         }
6160
6161         return list;
6162 }
6163
6164 /* This function takes the newly calculated list, and figures out which regions
6165  * have changed.  It then queues a redraw approporiately.
6166  */
6167 static void
6168 merge_selection_region (EvView *view,
6169                         GList  *new_list)
6170 {
6171         GList *old_list;
6172         GList *new_list_ptr, *old_list_ptr;
6173
6174         /* Update the selection */
6175         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
6176         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6177         g_list_free (view->selection_info.selections);
6178         view->selection_info.selections = new_list;
6179         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
6180         g_object_notify (G_OBJECT (view), "has-selection");
6181
6182         new_list_ptr = new_list;
6183         old_list_ptr = old_list;
6184
6185         while (new_list_ptr || old_list_ptr) {
6186                 EvViewSelection *old_sel, *new_sel;
6187                 int cur_page;
6188                 GdkRegion *region = NULL;
6189
6190                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
6191                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
6192
6193                 /* Assume that the lists are in order, and we run through them
6194                  * comparing them, one page at a time.  We come out with the
6195                  * first page we see. */
6196                 if (new_sel && old_sel) {
6197                         if (new_sel->page < old_sel->page) {
6198                                 new_list_ptr = new_list_ptr->next;
6199                                 old_sel = NULL;
6200                         } else if (new_sel->page > old_sel->page) {
6201                                 old_list_ptr = old_list_ptr->next;
6202                                 new_sel = NULL;
6203                         } else {
6204                                 new_list_ptr = new_list_ptr->next;
6205                                 old_list_ptr = old_list_ptr->next;
6206                         }
6207                 } else if (new_sel) {
6208                         new_list_ptr = new_list_ptr->next;
6209                 } else if (old_sel) {
6210                         old_list_ptr = old_list_ptr->next;
6211                 }
6212
6213                 g_assert (new_sel || old_sel);
6214
6215                 /* is the page we're looking at on the screen?*/
6216                 cur_page = new_sel ? new_sel->page : old_sel->page;
6217                 if (cur_page < view->start_page || cur_page > view->end_page)
6218                         continue;
6219
6220                 /* seed the cache with a new page.  We are going to need the new
6221                  * region too. */
6222                 if (new_sel) {
6223                         GdkRegion *tmp_region = NULL;
6224
6225                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
6226                                                                cur_page,
6227                                                                view->scale,
6228                                                                &tmp_region);
6229
6230                         if (tmp_region) {
6231                                 new_sel->covered_region = gdk_region_copy (tmp_region);
6232                         }
6233                 }
6234
6235                 /* Now we figure out what needs redrawing */
6236                 if (old_sel && new_sel) {
6237                         if (old_sel->covered_region && new_sel->covered_region) {
6238                                 /* We only want to redraw the areas that have
6239                                  * changed, so we xor the old and new regions
6240                                  * and redraw if it's different */
6241                                 region = gdk_region_copy (old_sel->covered_region);
6242                                 gdk_region_xor (region, new_sel->covered_region);
6243                                 if (gdk_region_empty (region)) {
6244                                         gdk_region_destroy (region);
6245                                         region = NULL;
6246                                 }
6247                         } else if (old_sel->covered_region) {
6248                                 region = gdk_region_copy (old_sel->covered_region);
6249                         } else if (new_sel->covered_region) {
6250                                 region = gdk_region_copy (new_sel->covered_region);
6251                         }
6252                 } else if (old_sel && !new_sel) {
6253                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
6254                                 region = gdk_region_copy (old_sel->covered_region);
6255                         }
6256                 } else if (!old_sel && new_sel) {
6257                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
6258                                 region = gdk_region_copy (new_sel->covered_region);
6259                         }
6260                 } else {
6261                         g_assert_not_reached ();
6262                 }
6263
6264                 /* Redraw the damaged region! */
6265                 if (region) {
6266                         GdkRectangle page_area;
6267                         GtkBorder border;
6268
6269                         /* I don't know why but the region is smaller
6270                          * than expected. This hack fixes it, I guess
6271                          * 10 pixels more won't hurt
6272                          */
6273                         gdk_region_shrink (region, -5, -5);
6274
6275                         get_page_extents (view, cur_page, &page_area, &border);
6276                         gdk_region_offset (region,
6277                                            page_area.x + border.left - view->scroll_x,
6278                                            page_area.y + border.top - view->scroll_y);
6279                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
6280                         gdk_region_destroy (region);
6281                 }
6282         }
6283
6284         /* Free the old list, now that we're done with it. */
6285         g_list_foreach (old_list, (GFunc) selection_free, NULL);
6286         g_list_free (old_list);
6287 }
6288
6289 static void
6290 compute_selections (EvView          *view,
6291                     EvSelectionStyle style,
6292                     GdkPoint        *start,
6293                     GdkPoint        *stop)
6294 {
6295         GList *list;
6296
6297         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
6298                 list = compute_new_selection_rect (view, start, stop);
6299         else
6300                 list = compute_new_selection_text (view, style, start, stop);
6301         merge_selection_region (view, list);
6302 }
6303
6304 /* Free's the selection.  It's up to the caller to queue redraws if needed.
6305  */
6306 static void
6307 selection_free (EvViewSelection *selection)
6308 {
6309         if (selection->covered_region)
6310                 gdk_region_destroy (selection->covered_region);
6311         g_free (selection);
6312 }
6313
6314 static void
6315 clear_selection (EvView *view)
6316 {
6317         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6318         g_list_free (view->selection_info.selections);
6319         view->selection_info.selections = NULL;
6320         view->selection_info.in_selection = FALSE;
6321         if (view->pixbuf_cache)
6322                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6323         g_object_notify (G_OBJECT (view), "has-selection");
6324 }
6325
6326 void
6327 ev_view_select_all (EvView *view)
6328 {
6329         GList *selections = NULL;
6330         int n_pages, i;
6331
6332         /* Disable selection on rotated pages for the 0.4.0 series */
6333         if (view->rotation != 0)
6334                 return;
6335
6336         clear_selection (view);
6337
6338         n_pages = ev_document_get_n_pages (view->document);
6339         for (i = 0; i < n_pages; i++) {
6340                 gdouble width, height;
6341                 EvViewSelection *selection;
6342
6343                 get_doc_page_size (view, i, &width, &height);
6344
6345                 selection = g_new0 (EvViewSelection, 1);
6346                 selection->page = i;
6347                 selection->style = EV_SELECTION_STYLE_GLYPH;
6348                 selection->rect.x1 = selection->rect.y1 = 0;
6349                 selection->rect.x2 = width;
6350                 selection->rect.y2 = height;
6351
6352                 selections = g_list_append (selections, selection);
6353         }
6354
6355         merge_selection_region (view, selections);
6356         gtk_widget_queue_draw (GTK_WIDGET (view));
6357 }
6358
6359 gboolean
6360 ev_view_get_has_selection (EvView *view)
6361 {
6362         return view->selection_info.selections != NULL;
6363 }
6364
6365 static char *
6366 get_selected_text (EvView *view)
6367 {
6368         GString *text;
6369         GList *l;
6370         gchar *normalized_text;
6371         EvRenderContext *rc;
6372
6373         text = g_string_new (NULL);
6374         rc = ev_render_context_new (NULL, view->rotation, view->scale);
6375
6376         ev_document_doc_mutex_lock ();
6377
6378         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6379                 EvViewSelection *selection = (EvViewSelection *)l->data;
6380                 EvPage *page;
6381                 gchar *tmp;
6382
6383                 page = ev_document_get_page (view->document, selection->page);
6384                 ev_render_context_set_page (rc, page);
6385                 g_object_unref (page);
6386
6387                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6388                                                       rc, selection->style,
6389                                                       &(selection->rect));
6390
6391                 g_string_append (text, tmp);
6392                 g_free (tmp);
6393         }
6394
6395         g_object_unref (rc);
6396
6397         ev_document_doc_mutex_unlock ();
6398
6399         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6400         g_string_free (text, TRUE);
6401         return normalized_text;
6402 }
6403
6404 static void
6405 ev_view_clipboard_copy (EvView      *view,
6406                         const gchar *text)
6407 {
6408         GtkClipboard *clipboard;
6409
6410         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6411                                               GDK_SELECTION_CLIPBOARD);
6412         gtk_clipboard_set_text (clipboard, text, -1);
6413 }
6414
6415 void
6416 ev_view_copy (EvView *ev_view)
6417 {
6418         char *text;
6419
6420         if (!EV_IS_SELECTION (ev_view->document))
6421                 return;
6422
6423         text = get_selected_text (ev_view);
6424         ev_view_clipboard_copy (ev_view, text);
6425         g_free (text);
6426 }
6427
6428 static void
6429 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6430                         GtkSelectionData *selection_data,
6431                         guint             info,
6432                         gpointer          data)
6433 {
6434         EvView *ev_view = EV_VIEW (data);
6435
6436         if (ev_view->link_selected) {
6437                 gtk_selection_data_set_text (selection_data,
6438                                              ev_link_action_get_uri (ev_view->link_selected),
6439                                              -1);
6440         } else if (EV_IS_SELECTION (ev_view->document) &&
6441                    ev_view->selection_info.selections) {
6442                 gchar *text;
6443
6444                 text = get_selected_text (ev_view);
6445                 if (text) {
6446                         gtk_selection_data_set_text (selection_data, text, -1);
6447                         g_free (text);
6448                 }
6449         }
6450 }
6451
6452 static void
6453 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6454                           gpointer      data)
6455 {
6456         EvView *view = EV_VIEW (data);
6457
6458         clear_selection (view);
6459         clear_link_selected (view);
6460 }
6461
6462 static void
6463 ev_view_update_primary_selection (EvView *ev_view)
6464 {
6465         GtkClipboard *clipboard;
6466
6467         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6468                                               GDK_SELECTION_PRIMARY);
6469
6470         if (ev_view->selection_info.selections || ev_view->link_selected) {
6471                 GtkTargetList *target_list;
6472                 GtkTargetEntry *targets;
6473                 int n_targets;
6474
6475                 target_list = gtk_target_list_new (NULL, 0);
6476                 gtk_target_list_add_text_targets (target_list, 0);
6477                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6478                 gtk_target_list_unref (target_list);
6479
6480                 if (!gtk_clipboard_set_with_owner (clipboard,
6481                                                    targets, n_targets,
6482                                                    ev_view_primary_get_cb,
6483                                                    ev_view_primary_clear_cb,
6484                                                    G_OBJECT (ev_view)))
6485                         ev_view_primary_clear_cb (clipboard, ev_view);
6486
6487                 gtk_target_table_free (targets, n_targets);
6488         } else {
6489                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6490                         gtk_clipboard_clear (clipboard);
6491         }
6492 }
6493
6494 static void
6495 clear_link_selected (EvView *view)
6496 {
6497         if (view->link_selected) {
6498                 g_object_unref (view->link_selected);
6499                 view->link_selected = NULL;
6500         }
6501 }
6502
6503 void
6504 ev_view_copy_link_address (EvView       *view,
6505                            EvLinkAction *action)
6506 {
6507         clear_link_selected (view);
6508
6509         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6510
6511         view->link_selected = g_object_ref (action);
6512         ev_view_update_primary_selection (view);
6513 }
6514
6515 /*** Cursor operations ***/
6516
6517 static GdkCursor *
6518 ev_view_create_invisible_cursor(void)
6519 {
6520        GdkBitmap *empty;
6521        GdkColor black = { 0, 0, 0, 0 };
6522        static char bits[] = { 0x00 };
6523
6524        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
6525
6526        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
6527 }
6528
6529 static void
6530 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6531 {
6532         GdkCursor *cursor = NULL;
6533         GdkDisplay *display;
6534         GtkWidget *widget;
6535
6536         if (view->cursor == new_cursor) {
6537                 return;
6538         }
6539
6540         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6541         display = gtk_widget_get_display (widget);
6542         view->cursor = new_cursor;
6543
6544         switch (new_cursor) {
6545                 case EV_VIEW_CURSOR_NORMAL:
6546                         gdk_window_set_cursor (view->layout.bin_window, NULL);
6547                         break;
6548                 case EV_VIEW_CURSOR_IBEAM:
6549                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
6550                         break;
6551                 case EV_VIEW_CURSOR_LINK:
6552                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
6553                         break;
6554                 case EV_VIEW_CURSOR_WAIT:
6555                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
6556                         break;
6557                 case EV_VIEW_CURSOR_HIDDEN:
6558                         cursor = ev_view_create_invisible_cursor ();
6559                         break;
6560                 case EV_VIEW_CURSOR_DRAG:
6561                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
6562                         break;
6563                 case EV_VIEW_CURSOR_AUTOSCROLL:
6564                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
6565                         break;
6566         }
6567
6568         if (cursor) {
6569                 gdk_window_set_cursor (view->layout.bin_window, cursor);
6570                 gdk_cursor_unref (cursor);
6571                 gdk_flush();
6572         }
6573 }
6574
6575 void
6576 ev_view_hide_cursor (EvView *view)
6577 {
6578        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6579 }
6580
6581 void
6582 ev_view_show_cursor (EvView *view)
6583 {
6584        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6585 }
6586
6587 static void
6588 ev_view_reset_presentation_state (EvView *view)
6589 {
6590         if (!view->presentation ||
6591             view->presentation_state == EV_PRESENTATION_NORMAL)
6592                 return;
6593
6594         view->presentation_state = EV_PRESENTATION_NORMAL;
6595         gdk_window_set_background (view->layout.bin_window,
6596                                    &GTK_WIDGET (view)->style->black);
6597         gtk_widget_queue_draw (GTK_WIDGET (view));
6598 }
6599
6600 gboolean
6601 ev_view_next_page (EvView *view)
6602 {
6603         int page, n_pages;
6604
6605         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6606
6607         if (!view->document)
6608                 return FALSE;
6609
6610         if (view->presentation &&
6611             (view->presentation_state == EV_PRESENTATION_BLACK ||
6612              view->presentation_state == EV_PRESENTATION_WHITE)) {
6613                 ev_view_reset_presentation_state (view);
6614                 return FALSE;
6615         }
6616
6617         if (view->animation) {
6618                 ev_view_transition_animation_cancel (view->animation, view);
6619         }
6620
6621         ev_view_presentation_transition_stop (view);
6622         ev_view_reset_presentation_state (view);
6623
6624         page = ev_document_model_get_page (view->model);
6625         n_pages = ev_document_get_n_pages (view->document);
6626
6627         if (view->dual_page && !view->presentation)
6628                 page = page + 2;
6629         else
6630                 page = page + 1;
6631
6632         if (page < n_pages) {
6633                 ev_document_model_set_page (view->model, page);
6634                 return TRUE;
6635         } else if (view->presentation && page == n_pages) {
6636                 view->presentation_state = EV_PRESENTATION_END;
6637                 gtk_widget_queue_draw (GTK_WIDGET (view));
6638                 return TRUE;
6639         } else if (view->dual_page && page == n_pages) {
6640                 ev_document_model_set_page (view->model, page - 1);
6641                 return TRUE;
6642         } else {
6643                 return FALSE;
6644         }
6645 }
6646
6647 gboolean
6648 ev_view_previous_page (EvView *view)
6649 {
6650         int page;
6651
6652         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6653
6654         if (!view->document)
6655                 return FALSE;
6656
6657         if (view->presentation &&
6658             view->presentation_state == EV_PRESENTATION_END) {
6659                 ev_view_reset_presentation_state (view);
6660                 return TRUE;
6661         }
6662
6663         if (view->presentation &&
6664             (view->presentation_state == EV_PRESENTATION_BLACK ||
6665              view->presentation_state == EV_PRESENTATION_WHITE)) {
6666                 ev_view_reset_presentation_state (view);
6667                 return FALSE;
6668         }
6669
6670         if (view->animation) {
6671                 ev_view_transition_animation_cancel (view->animation, view);
6672         }
6673
6674         ev_view_reset_presentation_state (view);
6675
6676         page = ev_document_model_get_page (view->model);
6677
6678         if (view->dual_page && !view->presentation)
6679                 page = page - 2;
6680         else
6681                 page = page - 1;
6682
6683         if (page >= 0) {
6684                 ev_document_model_set_page (view->model, page);
6685                 return TRUE;
6686         } else if (ev_view_get_dual_page (view) && page == -1) {
6687                 ev_document_model_set_page (view->model, 0);
6688                 return TRUE;
6689         } else {
6690                 return FALSE;
6691         }
6692 }
6693