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