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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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-pixbuf-cache.h"
  37 #include "ev-page-cache.h"
  38 #include "ev-view-marshal.h"
  39 #include "ev-document-annotations.h"
  40 #include "ev-annotation-window.h"
  41 #include "ev-loading-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         SIGNAL_BINDING_ACTIVATED,
  53         SIGNAL_HANDLE_LINK,
  54         SIGNAL_EXTERNAL_LINK,
  55         SIGNAL_POPUP_MENU,
  56         SIGNAL_SELECTION_CHANGED,
  57         SIGNAL_SYNC_SOURCE,
  58         N_SIGNALS
  59 };
  60
  61 enum {
  62         TARGET_DND_URI,
  63         TARGET_DND_TEXT,
  64         TARGET_DND_IMAGE
  65 };
  66
  67 static guint signals[N_SIGNALS];
  68
  69 typedef enum {
  70         EV_VIEW_FIND_NEXT,
  71         EV_VIEW_FIND_PREV
  72 } EvViewFindDirection;
  73
  74 #define ZOOM_IN_FACTOR  1.2
  75 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  76
  77 #define SCROLL_TIME 150
  78
  79 /*** Scrolling ***/
  80 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  81                                                               GtkAdjustment      *hadjustment,
  82                                                               GtkAdjustment      *vadjustment);
  83 static void       view_update_range_and_current_page         (EvView             *view);
  84 static void       set_scroll_adjustment                      (EvView             *view,
  85                                                               GtkOrientation      orientation,
  86                                                               GtkAdjustment      *adjustment);
  87 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
  88                                                               guint               keyval,
  89                                                               GdkModifierType modifiers,
  90                                                               GtkScrollType       scroll,
  91                                                               gboolean            horizontal);
  92 static void       ensure_rectangle_is_visible                (EvView             *view,
  93                                                               GdkRectangle       *rect);
  94
  95 /*** Geometry computations ***/
  96 static void       compute_border                             (EvView             *view,
  97                                                               int                 width,
  98                                                               int                 height,
  99                                                               GtkBorder          *border);
 100 static void       get_page_y_offset                          (EvView             *view,
 101                                                               int                 page,
 102                                                               int                *y_offset);
 103 static void       view_rect_to_doc_rect                      (EvView             *view,
 104                                                               GdkRectangle       *view_rect,
 105                                                               GdkRectangle       *page_area,
 106                                                               EvRectangle        *doc_rect);
 107 static void       doc_rect_to_view_rect                      (EvView             *view,
 108                                                               int                 page,
 109                                                               EvRectangle        *doc_rect,
 110                                                               GdkRectangle       *view_rect);
 111 static gboolean   get_dual_even_left                         (EvView             *view);
 112 static void       find_page_at_location                      (EvView             *view,
 113                                                               gdouble             x,
 114                                                               gdouble             y,
 115                                                               gint               *page,
 116                                                               gint               *x_offset,
 117                                                               gint               *y_offset);
 118 static void       doc_point_to_view_point                    (EvView             *view,
 119                                                               int                 page,
 120                                                               EvPoint            *doc_point,
 121                                                               GdkPoint           *view_point);
 122 /*** Hyperrefs ***/
 123 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 124                                                               gdouble             x,
 125                                                               gdouble             y);
 126 static char*      tip_from_link                              (EvView             *view,
 127                                                               EvLink             *link);
 128 /*** Forms ***/
 129 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 130                                                                gdouble            x,
 131                                                                gdouble            y);
 132
 133 /*** Annotations ***/
 134 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 135                                                               gdouble             x,
 136                                                               gdouble             y);
 137 static void          show_annotation_windows                 (EvView             *view,
 138                                                               gint                page);
 139 static void          hide_annotation_windows                 (EvView             *view,
 140                                                               gint                page);
 141 /*** GtkWidget implementation ***/
 142 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 143                                                               GtkRequisition     *requisition);
 144 static void       ev_view_size_request_continuous            (EvView             *view,
 145                                                               GtkRequisition     *requisition);
 146 static void       ev_view_size_request_dual_page             (EvView             *view,
 147                                                               GtkRequisition     *requisition);
 148 static void       ev_view_size_request_single_page           (EvView             *view,
 149                                                               GtkRequisition     *requisition);
 150 static void       ev_view_size_request                       (GtkWidget          *widget,
 151                                                               GtkRequisition     *requisition);
 152 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 153                                                               GtkAllocation      *allocation);
 154 static void       ev_view_realize                            (GtkWidget          *widget);
 155 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 156                                                               GdkEventScroll     *event);
 157 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 158                                                               GdkEventExpose     *event);
 159 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 160 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 161                                                               GdkEventButton     *event);
 162 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 163                                                               GdkEventMotion     *event);
 164 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 165                                                               GdkEventButton     *event);
 166 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 167                                                               GdkEventCrossing   *event);
 168 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 169                                                               GdkEventCrossing   *event);
 170 static void       ev_view_style_set                          (GtkWidget          *widget,
 171                                                               GtkStyle           *old_style);
 172 static void       ev_view_remove_all                         (EvView             *view);
 173
 174 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 175
 176 /*** Drawing ***/
 177 static void       highlight_find_results                     (EvView             *view,
 178                                                               int                 page);
 179 static void       highlight_forward_search_results           (EvView             *view,
 180                                                               int                 page);
 181 static void       draw_one_page                              (EvView             *view,
 182                                                               gint                page,
 183                                                               cairo_t            *cr,
 184                                                               GdkRectangle       *page_area,
 185                                                               GtkBorder          *border,
 186                                                               GdkRectangle       *expose_area,
 187                                                               gboolean           *page_ready);
 188 static void       show_loading_window                        (EvView             *view);
 189 static void       hide_loading_window                        (EvView             *view);
 190 static void       ev_view_reload_page                        (EvView             *view,
 191                                                               gint                page,
 192                                                               GdkRegion          *region);
 193 static void       ev_view_loading_window_move                (EvView             *view);
 194
 195 /*** Callbacks ***/
 196 static void       ev_view_change_page                        (EvView             *view,
 197                                                               gint                new_page);
 198 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 199                                                               GdkRegion          *region,
 200                                                               EvView             *view);
 201 static void       ev_view_page_changed_cb                    (EvDocumentModel    *model,
 202                                                               gint                old_page,
 203                                                               gint                new_page,
 204                                                               EvView             *view);
 205 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 206                                                               EvView             *view);
 207
 208 /*** GObject ***/
 209 static void       ev_view_finalize                           (GObject            *object);
 210 static void       ev_view_destroy                            (GtkObject          *object);
 211 static void       ev_view_class_init                         (EvViewClass        *class);
 212 static void       ev_view_init                               (EvView             *view);
 213
 214 /*** Zoom and sizing ***/
 215 static double   zoom_for_size_fit_width                      (gdouble doc_width,
 216                                                               gdouble doc_height,
 217                                                               int     target_width,
 218                                                               int     target_height);
 219 static double   zoom_for_size_fit_height                     (gdouble doc_width,
 220                                                               gdouble doc_height,
 221                                                               int     target_width,
 222                                                               int     target_height);
 223 static double   zoom_for_size_best_fit                       (gdouble doc_width,
 224                                                               gdouble doc_height,
 225                                                               int     target_width,
 226                                                               int     target_height);
 227 static void     ev_view_zoom_for_size                        (EvView *view,
 228                                                               int     width,
 229                                                               int     height);
 230 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 231                                                                 int     width,
 232                                                                 int     height);
 233 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 234                                                                 int     width,
 235                                                                 int     height);
 236 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 237                                                                 int     width,
 238                                                                 int     height);
 239 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 240                                                                 int     width,
 241                                                                 int     height);
 242 /*** Cursors ***/
 243 static void       ev_view_set_cursor                         (EvView             *view,
 244                                                               EvViewCursor        new_cursor);
 245 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 246                                                               gint x,
 247                                                               gint y);
 248
 249 /*** Find ***/
 250 static gint         ev_view_find_get_n_results               (EvView             *view,
 251                                                               gint                page);
 252 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 253                                                               gint                page,
 254                                                               gint                result);
 255 static void       jump_to_find_result                        (EvView             *view);
 256 static void       jump_to_find_page                          (EvView             *view,
 257                                                               EvViewFindDirection direction,
 258                                                               gint                shift);
 259 /*** Selection ***/
 260 static void       compute_selections                         (EvView             *view,
 261                                                               EvSelectionStyle    style,
 262                                                               GdkPoint           *start,
 263                                                               GdkPoint           *stop);
 264 static void       clear_selection                            (EvView             *view);
 265 static void       clear_link_selected                        (EvView             *view);
 266 static void       selection_free                             (EvViewSelection    *selection);
 267 static char*      get_selected_text                          (EvView             *ev_view);
 268 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 269                                                               GtkSelectionData   *selection_data,
 270                                                               guint               info,
 271                                                               gpointer            data);
 272 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 273                                                               gpointer            data);
 274 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 275
 276 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 277
 278 /* HeightToPage cache */
 279 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 280
 281 static void
 282 build_height_to_page (EvHeightToPageCache *cache,
 283                       EvDocument          *document,
 284                       gint                 rotation)
 285 {
 286         gboolean swap, uniform, dual_even_left;
 287         int i;
 288         double uniform_height, page_height, next_page_height;
 289         double saved_height;
 290         gdouble u_width, u_height;
 291         gint n_pages;
 292
 293         swap = (rotation == 90 || rotation == 270);
 294
 295         uniform = ev_document_is_page_size_uniform (document);
 296         n_pages = ev_document_get_n_pages (document);
 297         dual_even_left = (n_pages > 2);
 298
 299         g_free (cache->height_to_page);
 300         g_free (cache->dual_height_to_page);
 301
 302         cache->rotation = rotation;
 303         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 304         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 305
 306         if (uniform)
 307                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 308
 309         saved_height = 0;
 310         for (i = 0; i <= n_pages; i++) {
 311                 if (uniform) {
 312                         uniform_height = swap ? u_width : u_height;
 313                         cache->height_to_page[i] = i * uniform_height;
 314                 } else {
 315                         if (i < n_pages) {
 316                                 gdouble w, h;
 317
 318                                 ev_document_get_page_size (document, i, &w, &h);
 319                                 page_height = swap ? w : h;
 320                         } else {
 321                                 page_height = 0;
 322                         }
 323                         cache->height_to_page[i] = saved_height;
 324                         saved_height += page_height;
 325                 }
 326         }
 327
 328         if (dual_even_left && !uniform) {
 329                 gdouble w, h;
 330
 331                 ev_document_get_page_size (document, 0, &w, &h);
 332                 saved_height = swap ? w : h;
 333         } else {
 334                 saved_height = 0;
 335         }
 336
 337         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 338                 if (uniform) {
 339                         uniform_height = swap ? u_width : u_height;
 340                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 341                         if (i + 1 < n_pages + 2)
 342                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 343                 } else {
 344                         if (i + 1 < n_pages) {
 345                                 gdouble w, h;
 346
 347                                 ev_document_get_page_size (document, i + 1, &w, &h);
 348                                 next_page_height = swap ? w : h;
 349                         } else {
 350                                 next_page_height = 0;
 351                         }
 352
 353                         if (i < n_pages) {
 354                                 gdouble w, h;
 355
 356                                 ev_document_get_page_size (document, i, &w, &h);
 357                                 page_height = swap ? w : h;
 358                         } else {
 359                                 page_height = 0;
 360                         }
 361
 362                         if (i + 1 < n_pages + 2) {
 363                                 cache->dual_height_to_page[i] = saved_height;
 364                                 cache->dual_height_to_page[i + 1] = saved_height;
 365                                 saved_height += MAX(page_height, next_page_height);
 366                         } else {
 367                                 cache->dual_height_to_page[i] = saved_height;
 368                         }
 369                 }
 370         }
 371 }
 372
 373 static void
 374 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 375                                     EvDocument          *document,
 376                                     gint                 page,
 377                                     gint                 rotation,
 378                                     gdouble             *height,
 379                                     gdouble             *dual_height)
 380 {
 381         if (cache->rotation != rotation)
 382                 build_height_to_page (cache, document, rotation);
 383
 384         *height = cache->height_to_page[page];
 385         *dual_height = cache->dual_height_to_page[page];
 386 }
 387
 388 static void
 389 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 390 {
 391         if (cache->height_to_page) {
 392                 g_free (cache->height_to_page);
 393                 cache->height_to_page = NULL;
 394         }
 395
 396         if (cache->dual_height_to_page) {
 397                 g_free (cache->dual_height_to_page);
 398                 cache->dual_height_to_page = NULL;
 399         }
 400         g_free (cache);
 401 }
 402
 403 static EvHeightToPageCache *
 404 ev_view_get_height_to_page_cache (EvView *view)
 405 {
 406         EvHeightToPageCache *cache;
 407
 408         if (!view->document)
 409                 return NULL;
 410
 411         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 412         if (!cache) {
 413                 cache = g_new0 (EvHeightToPageCache, 1);
 414                 build_height_to_page (cache, view->document, view->rotation);
 415                 g_object_set_data_full (G_OBJECT (view->document),
 416                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 417                                         cache,
 418                                         (GDestroyNotify)ev_height_to_page_cache_free);
 419         }
 420
 421         return cache;
 422 }
 423
 424 static void
 425 ev_view_get_height_to_page (EvView *view,
 426                             gint    page,
 427                             gint   *height,
 428                             gint   *dual_height)
 429 {
 430         gdouble h, dh;
 431
 432         if (!view->height_to_page_cache)
 433                 return;
 434
 435         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 436                                             view->document,
 437                                             page,
 438                                             view->rotation,
 439                                             &h, &dh);
 440         if (height)
 441                 *height = (gint)(h * view->scale + 0.5);
 442
 443         if (dual_height)
 444                 *dual_height = (gint)(dh * view->scale + 0.5);
 445 }
 446
 447 static gint
 448 ev_view_get_scrollbar_size (EvView        *view,
 449                             GtkOrientation orientation)
 450 {
 451         GtkWidget *widget = GTK_WIDGET (view);
 452         GtkWidget *sb;
 453         GtkWidget *swindow = gtk_widget_get_parent (GTK_WIDGET (view));
 454         GtkAllocation allocation;
 455         GtkRequisition req;
 456         gint spacing;
 457
 458         if (!GTK_IS_SCROLLED_WINDOW (swindow))
 459                 return 0;
 460
 461         gtk_widget_get_allocation (widget, &allocation);
 462
 463         if (orientation == GTK_ORIENTATION_VERTICAL) {
 464                 if (allocation.height >= view->requisition.height)
 465                         sb = gtk_scrolled_window_get_vscrollbar (GTK_SCROLLED_WINDOW (swindow));
 466                 else
 467                         return 0;
 468         } else {
 469                 if (allocation.width >= view->requisition.width)
 470                         sb = gtk_scrolled_window_get_hscrollbar (GTK_SCROLLED_WINDOW (swindow));
 471                 else
 472                         return 0;
 473         }
 474
 475         gtk_widget_style_get (swindow, "scrollbar_spacing", &spacing, NULL);
 476         gtk_widget_size_request (sb, &req);
 477
 478         return (orientation == GTK_ORIENTATION_VERTICAL ? req.width : req.height) + spacing;
 479 }
 480
 481 static void
 482 scroll_to_point (EvView        *view,
 483                  gdouble        x,
 484                  gdouble        y,
 485                  GtkOrientation orientation)
 486 {
 487         gdouble page_size;
 488         gdouble upper, lower;
 489
 490         if (orientation == GTK_ORIENTATION_VERTICAL) {
 491                 page_size = gtk_adjustment_get_page_size (view->vadjustment);
 492                 upper = gtk_adjustment_get_upper (view->vadjustment);
 493                 lower = gtk_adjustment_get_lower (view->vadjustment);
 494
 495                 if (view->continuous) {
 496                         gtk_adjustment_clamp_page (view->vadjustment,
 497                                                    y - view->spacing / 2,
 498                                                    y + page_size);
 499                 } else {
 500                         gtk_adjustment_set_value (view->vadjustment,
 501                                                   CLAMP (y, lower, upper - page_size));
 502                 }
 503         } else {
 504                 page_size = gtk_adjustment_get_page_size (view->hadjustment);
 505                 upper = gtk_adjustment_get_upper (view->hadjustment);
 506                 lower = gtk_adjustment_get_lower (view->hadjustment);
 507
 508                 if (view->dual_page) {
 509                         gtk_adjustment_clamp_page (view->hadjustment, x,
 510                                                    x + page_size);
 511                 } else {
 512                         gtk_adjustment_set_value (view->hadjustment,
 513                                                   CLAMP (x, lower, upper - page_size));
 514                 }
 515         }
 516 }
 517
 518 static void
 519 ev_view_scroll_to_page_position (EvView *view, GtkOrientation orientation)
 520 {
 521         gdouble x, y;
 522
 523         if (!view->document)
 524                 return;
 525
 526         if ((orientation == GTK_ORIENTATION_VERTICAL && view->pending_point.y == 0) ||
 527             (orientation == GTK_ORIENTATION_HORIZONTAL && view->pending_point.x == 0)) {
 528                 GdkRectangle page_area;
 529                 GtkBorder    border;
 530
 531                 ev_view_get_page_extents (view, view->current_page, &page_area, &border);
 532                 x = page_area.x;
 533                 y = page_area.y;
 534         } else {
 535                 GdkPoint view_point;
 536
 537                 doc_point_to_view_point (view, view->current_page,
 538                                          &view->pending_point, &view_point);
 539                 x = view_point.x;
 540                 y = view_point.y;
 541         }
 542
 543         scroll_to_point (view, x, y, orientation);
 544 }
 545
 546 static void
 547 view_set_adjustment_values (EvView         *view,
 548                             GtkOrientation  orientation)
 549 {
 550         GtkWidget *widget = GTK_WIDGET (view);
 551         GtkAdjustment *adjustment;
 552         GtkAllocation allocation;
 553         int req_size;
 554         int alloc_size;
 555         gdouble page_size;
 556         gdouble value;
 557         gdouble upper;
 558         double factor;
 559         gint new_value;
 560
 561         gtk_widget_get_allocation (widget, &allocation);
 562
 563         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 564                 req_size = view->requisition.width;
 565                 alloc_size = allocation.width;
 566                 adjustment = view->hadjustment;
 567         } else {
 568                 req_size = view->requisition.height;
 569                 alloc_size = allocation.height;
 570                 adjustment = view->vadjustment;
 571         }
 572
 573         if (!adjustment)
 574                 return;
 575
 576         factor = 1.0;
 577         value = gtk_adjustment_get_value (adjustment);
 578         upper = gtk_adjustment_get_upper (adjustment);
 579         page_size = gtk_adjustment_get_page_size (adjustment);
 580
 581         switch (view->pending_scroll) {
 582                 case SCROLL_TO_KEEP_POSITION:
 583                 case SCROLL_TO_FIND_LOCATION:
 584                         factor = value / upper;
 585                         break;
 586                 case SCROLL_TO_PAGE_POSITION:
 587                         break;
 588                 case SCROLL_TO_CENTER:
 589                         factor = (value + page_size * 0.5) / upper;
 590                         break;
 591         }
 592
 593         upper = MAX (alloc_size, req_size);
 594         page_size = alloc_size;
 595
 596         gtk_adjustment_set_page_size (adjustment, page_size);
 597         gtk_adjustment_set_step_increment (adjustment, alloc_size * 0.1);
 598         gtk_adjustment_set_page_increment (adjustment, alloc_size * 0.9);
 599         gtk_adjustment_set_lower (adjustment, 0);
 600         gtk_adjustment_set_upper (adjustment, upper);
 601
 602         /*
 603          * We add 0.5 to the values before to average out our rounding errors.
 604          */
 605         switch (view->pending_scroll) {
 606                 case SCROLL_TO_KEEP_POSITION:
 607                 case SCROLL_TO_FIND_LOCATION:
 608                         new_value = CLAMP (upper * factor + 0.5, 0, upper - page_size);
 609                         gtk_adjustment_set_value (adjustment, (int)new_value);
 610                         break;
 611                 case SCROLL_TO_PAGE_POSITION:
 612                         ev_view_scroll_to_page_position (view, orientation);
 613                         break;
 614                 case SCROLL_TO_CENTER:
 615                         new_value = CLAMP (upper * factor - page_size * 0.5 + 0.5,
 616                                            0, upper - page_size);
 617                         gtk_adjustment_set_value (adjustment, (int)new_value);
 618                         break;
 619         }
 620
 621         gtk_adjustment_changed (adjustment);
 622 }
 623
 624 static void
 625 view_update_range_and_current_page (EvView *view)
 626 {
 627         gint start = view->start_page;
 628         gint end = view->end_page;
 629
 630         if (ev_document_get_n_pages (view->document) <= 0 ||
 631             !ev_document_check_dimensions (view->document))
 632                 return;
 633
 634         if (view->continuous) {
 635                 GdkRectangle current_area, unused, page_area;
 636                 GtkBorder border;
 637                 gboolean found = FALSE;
 638                 gint area_max = -1, area;
 639                 gint best_current_page = -1;
 640                 int i, j = 0;
 641
 642                 if (!(view->vadjustment && view->hadjustment))
 643                         return;
 644
 645                 current_area.x = gtk_adjustment_get_value (view->hadjustment);
 646                 current_area.width = gtk_adjustment_get_page_size (view->hadjustment);
 647                 current_area.y = gtk_adjustment_get_value (view->vadjustment);
 648                 current_area.height = gtk_adjustment_get_page_size (view->vadjustment);
 649
 650                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 651
 652                         ev_view_get_page_extents (view, i, &page_area, &border);
 653
 654                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 655                                 area = unused.width * unused.height;
 656
 657                                 if (!found) {
 658                                         area_max = area;
 659                                         view->start_page = i;
 660                                         found = TRUE;
 661                                         best_current_page = i;
 662                                 }
 663                                 if (area > area_max) {
 664                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 665                                         area_max = area;
 666                                 }
 667
 668                                 view->end_page = i;
 669                                 j = 0;
 670                         } else if (found && view->current_page <= view->end_page) {
 671                                 if (view->dual_page && j < 1) {
 672                                         /* In dual mode  we stop searching
 673                                          * after two consecutive non-visible pages.
 674                                          */
 675                                         j++;
 676                                         continue;
 677                                 }
 678                                 break;
 679                         }
 680                 }
 681
 682                 if (view->pending_scroll == SCROLL_TO_KEEP_POSITION) {
 683                         best_current_page = MAX (best_current_page, view->start_page);
 684
 685                         if (view->current_page != best_current_page) {
 686                                 view->current_page = best_current_page;
 687                                 hide_loading_window (view);
 688                                 ev_document_model_set_page (view->model, best_current_page);
 689                         }
 690                 }
 691         } else if (view->dual_page) {
 692                 if (view->current_page % 2 == get_dual_even_left (view)) {
 693                         view->start_page = view->current_page;
 694                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 695                                 view->end_page = view->start_page + 1;
 696                         else
 697                                 view->end_page = view->start_page;
 698                 } else {
 699                         if (view->current_page < 1)
 700                                 view->start_page = view->current_page;
 701                         else
 702                                 view->start_page = view->current_page - 1;
 703                         view->end_page = view->current_page;
 704                 }
 705         } else {
 706                 view->start_page = view->current_page;
 707                 view->end_page = view->current_page;
 708         }
 709
 710         if (view->start_page == -1 || view->end_page == -1)
 711                 return;
 712
 713         if (start != view->start_page || end != view->end_page) {
 714                 gint i;
 715
 716                 for (i = start; i < view->start_page && start != -1; i++) {
 717                         hide_annotation_windows (view, i);
 718                 }
 719
 720                 for (i = end; i > view->end_page && end != -1; i--) {
 721                         hide_annotation_windows (view, i);
 722                 }
 723         }
 724
 725         ev_page_cache_set_page_range (view->page_cache,
 726                                       view->start_page,
 727                                       view->end_page);
 728         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 729                                         view->start_page,
 730                                         view->end_page,
 731                                         view->selection_info.selections);
 732
 733         if (ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page))
 734             gtk_widget_queue_draw (GTK_WIDGET (view));
 735 }
 736
 737 static void
 738 set_scroll_adjustment (EvView *view,
 739                        GtkOrientation  orientation,
 740                        GtkAdjustment  *adjustment)
 741 {
 742         GtkAdjustment **to_set;
 743
 744         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 745                 to_set = &view->hadjustment;
 746         else
 747                 to_set = &view->vadjustment;
 748
 749         if (*to_set != adjustment) {
 750                 if (*to_set) {
 751                         g_signal_handlers_disconnect_by_func (*to_set,
 752                                                               (gpointer) on_adjustment_value_changed,
 753                                                               view);
 754                         g_object_unref (*to_set);
 755                 }
 756
 757                 *to_set = adjustment;
 758                 view_set_adjustment_values (view, orientation);
 759
 760                 if (*to_set) {
 761                         g_object_ref (*to_set);
 762                         g_signal_connect (*to_set, "value_changed",
 763                                           G_CALLBACK (on_adjustment_value_changed), view);
 764                 }
 765         }
 766 }
 767
 768 static void
 769 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 770                                 GtkAdjustment  *hadjustment,
 771                                 GtkAdjustment  *vadjustment)
 772 {
 773         EvView *view = EV_VIEW (layout);
 774
 775         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 776         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 777
 778         on_adjustment_value_changed (NULL, view);
 779 }
 780
 781 static void
 782 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 783                            guint           keyval,
 784                            GdkModifierType modifiers,
 785                            GtkScrollType   scroll,
 786                            gboolean        horizontal)
 787 {
 788   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 789
 790   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 791                                 "binding_activated", 2,
 792                                 GTK_TYPE_SCROLL_TYPE, scroll,
 793                                 G_TYPE_BOOLEAN, horizontal);
 794   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 795                                 "binding_activated", 2,
 796                                 GTK_TYPE_SCROLL_TYPE, scroll,
 797                                 G_TYPE_BOOLEAN, horizontal);
 798 }
 799
 800 static gdouble
 801 compute_scroll_increment (EvView        *view,
 802                           GtkScrollType  scroll)
 803 {
 804         GtkWidget *widget = GTK_WIDGET (view);
 805         GtkAdjustment *adjustment = view->vadjustment;
 806         GdkRegion *text_region, *region;
 807         GtkAllocation allocation;
 808         gint page;
 809         GdkRectangle rect;
 810         EvRectangle doc_rect;
 811         GdkRectangle page_area;
 812         GtkBorder border;
 813         GdkRectangle *recs;
 814         gint n_recs;
 815         gdouble fraction = 1.0;
 816
 817         if (scroll != GTK_SCROLL_PAGE_BACKWARD && scroll != GTK_SCROLL_PAGE_FORWARD)
 818                 return gtk_adjustment_get_page_size (adjustment);
 819
 820         page = scroll == GTK_SCROLL_PAGE_BACKWARD ? view->start_page : view->end_page;
 821
 822         text_region = ev_page_cache_get_text_mapping (view->page_cache, page);
 823         if (!text_region || gdk_region_empty (text_region))
 824                 return gtk_adjustment_get_page_size (adjustment);
 825
 826         gtk_widget_get_allocation (widget, &allocation);
 827         ev_view_get_page_extents (view, page, &page_area, &border);
 828         rect.x = page_area.x + view->scroll_x;
 829         rect.y = view->scroll_y + (scroll == GTK_SCROLL_PAGE_BACKWARD ? 5 : allocation.height - 5);
 830         rect.width = page_area.width;
 831         rect.height = 1;
 832         view_rect_to_doc_rect (view, &rect, &page_area, &doc_rect);
 833
 834         /* Convert the doc rectangle into a GdkRectangle */
 835         rect.x = doc_rect.x1;
 836         rect.y = doc_rect.y1;
 837         rect.width = doc_rect.x2 - doc_rect.x1;
 838         rect.height = MAX (1, doc_rect.y2 - doc_rect.y1);
 839         region = gdk_region_rectangle (&rect);
 840
 841         gdk_region_intersect (region, text_region);
 842         gdk_region_get_rectangles (region, &recs, &n_recs);
 843         gdk_region_destroy (region);
 844         if (n_recs > 0) {
 845                 EvRenderContext *rc;
 846                 EvPage  *ev_page;
 847
 848                 ev_page = ev_document_get_page (view->document, page);
 849                 rc = ev_render_context_new (ev_page, view->rotation, view->scale);
 850                 g_object_unref (ev_page);
 851                 /* Get the selection region to know the height of the line */
 852                 doc_rect.x1 = doc_rect.x2 = recs[0].x + 0.5;
 853                 doc_rect.y1 = doc_rect.y2 = recs[0].y + 0.5;
 854
 855                 ev_document_doc_mutex_lock ();
 856                 region = ev_selection_get_selection_region (EV_SELECTION (view->document),
 857                                                             rc, EV_SELECTION_STYLE_LINE,
 858                                                             &doc_rect);
 859                 ev_document_doc_mutex_unlock ();
 860
 861                 g_object_unref (rc);
 862                 g_free (recs);
 863                 gdk_region_get_rectangles (region, &recs, &n_recs);
 864                 gdk_region_destroy (region);
 865                 if (n_recs > 0) {
 866                         fraction = 1 - (recs[0].height / gtk_adjustment_get_page_size (adjustment));
 867                 }
 868                 g_free (recs);
 869         }
 870
 871         return gtk_adjustment_get_page_size (adjustment) * fraction;
 872
 873 }
 874
 875 void
 876 ev_view_scroll (EvView        *view,
 877                 GtkScrollType  scroll,
 878                 gboolean       horizontal)
 879 {
 880         GtkAdjustment *adjustment;
 881         double value, increment;
 882         gdouble upper, lower;
 883         gdouble page_size;
 884         gdouble step_increment;
 885         gboolean first_page = FALSE;
 886         gboolean last_page = FALSE;
 887
 888         view->jump_to_find_result = FALSE;
 889
 890         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
 891                 switch (scroll) {
 892                         case GTK_SCROLL_PAGE_BACKWARD:
 893                         case GTK_SCROLL_STEP_BACKWARD:
 894                                 ev_view_previous_page (view);
 895                                 break;
 896                         case GTK_SCROLL_PAGE_FORWARD:
 897                         case GTK_SCROLL_STEP_FORWARD:
 898                                 ev_view_next_page (view);
 899                                 break;
 900                         default:
 901                                 break;
 902                 }
 903                 return;
 904         }
 905
 906         /* Assign values for increment and vertical adjustment */
 907         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 908         value = gtk_adjustment_get_value (adjustment);
 909         upper = gtk_adjustment_get_upper (adjustment);
 910         lower = gtk_adjustment_get_lower (adjustment);
 911         page_size = gtk_adjustment_get_page_size (adjustment);
 912         step_increment = gtk_adjustment_get_step_increment (adjustment);
 913
 914         /* Assign boolean for first and last page */
 915         if (view->current_page == 0)
 916                 first_page = TRUE;
 917         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 918                 last_page = TRUE;
 919
 920         switch (scroll) {
 921                 case GTK_SCROLL_PAGE_BACKWARD:
 922                         /* Do not jump backwards if at the first page */
 923                         if (value == lower && first_page) {
 924                                 /* Do nothing */
 925                                 /* At the top of a page, assign the upper bound limit of previous page */
 926                         } else if (value == lower) {
 927                                 value = upper - page_size;
 928                                 ev_view_previous_page (view);
 929                                 /* Jump to the top */
 930                         } else {
 931                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_BACKWARD);
 932                                 value = MAX (value - increment, lower);
 933                         }
 934                         break;
 935                 case GTK_SCROLL_PAGE_FORWARD:
 936                         /* Do not jump forward if at the last page */
 937                         if (value == (upper - page_size) && last_page) {
 938                                 /* Do nothing */
 939                         /* At the bottom of a page, assign the lower bound limit of next page */
 940                         } else if (value == (upper - page_size)) {
 941                                 value = 0;
 942                                 ev_view_next_page (view);
 943                         /* Jump to the bottom */
 944                         } else {
 945                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_FORWARD);
 946                                 value = MIN (value + increment, upper - page_size);
 947                         }
 948                         break;
 949                 case GTK_SCROLL_STEP_BACKWARD:
 950                         value -= step_increment;
 951                         break;
 952                 case GTK_SCROLL_STEP_FORWARD:
 953                         value += step_increment;
 954                         break;
 955                 case GTK_SCROLL_STEP_DOWN:
 956                         value -= step_increment / 10;
 957                         break;
 958                 case GTK_SCROLL_STEP_UP:
 959                         value += step_increment / 10;
 960                         break;
 961                 default:
 962                         break;
 963         }
 964
 965         value = CLAMP (value, lower, upper - page_size);
 966
 967         gtk_adjustment_set_value (adjustment, value);
 968 }
 969
 970 #define MARGIN 5
 971
 972 static void
 973 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 974 {
 975         GtkWidget *widget = GTK_WIDGET (view);
 976         GtkAdjustment *adjustment;
 977         GtkAllocation allocation;
 978         gdouble adj_value;
 979         int value;
 980
 981         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 982
 983         gtk_widget_get_allocation (widget, &allocation);
 984
 985         adjustment = view->vadjustment;
 986         adj_value = gtk_adjustment_get_value (adjustment);
 987
 988         if (rect->y < adj_value) {
 989                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->y - MARGIN);
 990                 gtk_adjustment_set_value (view->vadjustment, value);
 991         } else if (rect->y + rect->height > adj_value + allocation.height) {
 992                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->y + rect->height -
 993                              allocation.height + MARGIN);
 994                 gtk_adjustment_set_value (view->vadjustment, value);
 995         }
 996
 997         adjustment = view->hadjustment;
 998         adj_value = gtk_adjustment_get_value (adjustment);
 999
1000         if (rect->x < adj_value) {
1001                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->x - MARGIN);
1002                 gtk_adjustment_set_value (view->hadjustment, value);
1003         } else if (rect->x + rect->height > adj_value + allocation.width) {
1004                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->x + rect->width -
1005                              allocation.width + MARGIN);
1006                 gtk_adjustment_set_value (view->hadjustment, value);
1007         }
1008
1009         gtk_widget_queue_resize (GTK_WIDGET (view));
1010 }
1011
1012 /*** Geometry computations ***/
1013
1014 static void
1015 compute_border (EvView *view, int width, int height, GtkBorder *border)
1016 {
1017         ev_document_misc_get_page_border_size (width, height, border);
1018 }
1019
1020 void
1021 _get_page_size_for_scale_and_rotation (EvDocument *document,
1022                                        gint        page,
1023                                        gdouble     scale,
1024                                        gint        rotation,
1025                                        gint       *page_width,
1026                                        gint       *page_height)
1027 {
1028         gdouble w, h;
1029         gint    width, height;
1030
1031         ev_document_get_page_size (document, page, &w, &h);
1032
1033         width = (gint)(w * scale + 0.5);
1034         height = (gint)(h * scale + 0.5);
1035
1036         if (page_width)
1037                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
1038         if (page_height)
1039                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
1040 }
1041
1042 static void
1043 ev_view_get_page_size (EvView *view,
1044                        gint    page,
1045                        gint   *page_width,
1046                        gint   *page_height)
1047 {
1048         _get_page_size_for_scale_and_rotation (view->document,
1049                                                page,
1050                                                view->scale,
1051                                                view->rotation,
1052                                                page_width,
1053                                                page_height);
1054 }
1055
1056 static void
1057 ev_view_get_max_page_size (EvView *view,
1058                            gint   *max_width,
1059                            gint   *max_height)
1060 {
1061         double w, h;
1062         gint   width, height;
1063
1064         ev_document_get_max_page_size (view->document, &w, &h);
1065
1066         width = (gint)(w * view->scale + 0.5);
1067         height = (gint)(h * view->scale + 0.5);
1068
1069         if (max_width)
1070                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
1071         if (max_height)
1072                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
1073 }
1074
1075 static void
1076 get_page_y_offset (EvView *view, int page, int *y_offset)
1077 {
1078         int max_width, offset;
1079         GtkBorder border;
1080
1081         g_return_if_fail (y_offset != NULL);
1082
1083         ev_view_get_max_page_size (view, &max_width, NULL);
1084         compute_border (view, max_width, max_width, &border);
1085
1086         if (view->dual_page) {
1087                 ev_view_get_height_to_page (view, page, NULL, &offset);
1088                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
1089                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
1090         } else {
1091                 ev_view_get_height_to_page (view, page, &offset, NULL);
1092                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
1093         }
1094
1095         *y_offset = offset;
1096         return;
1097 }
1098
1099 gboolean
1100 ev_view_get_page_extents (EvView       *view,
1101                           gint          page,
1102                           GdkRectangle *page_area,
1103                           GtkBorder    *border)
1104 {
1105         GtkWidget *widget;
1106         int width, height;
1107         GtkAllocation allocation;
1108
1109         widget = GTK_WIDGET (view);
1110         gtk_widget_get_allocation (widget, &allocation);
1111
1112         /* Get the size of the page */
1113         ev_view_get_page_size (view, page, &width, &height);
1114         compute_border (view, width, height, border);
1115         page_area->width = width + border->left + border->right;
1116         page_area->height = height + border->top + border->bottom;
1117
1118         if (view->continuous) {
1119                 gint max_width;
1120                 gint x, y;
1121
1122                 ev_view_get_max_page_size (view, &max_width, NULL);
1123                 max_width = max_width + border->left + border->right;
1124                 /* Get the location of the bounding box */
1125                 if (view->dual_page) {
1126                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1127                         x = x + MAX (0, allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1128                         if (page % 2 == get_dual_even_left (view))
1129                                 x = x + (max_width - width - border->left - border->right);
1130                 } else {
1131                         x = view->spacing;
1132                         x = x + MAX (0, allocation.width - (width + view->spacing * 2)) / 2;
1133                 }
1134
1135                 get_page_y_offset (view, page, &y);
1136
1137                 page_area->x = x;
1138                 page_area->y = y;
1139         } else {
1140                 gint x, y;
1141                 if (view->dual_page) {
1142                         gint width_2, height_2;
1143                         gint max_width = width;
1144                         gint max_height = height;
1145                         GtkBorder overall_border;
1146                         gint other_page;
1147
1148                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1149
1150                         /* First, we get the bounding box of the two pages */
1151                         if (other_page < ev_document_get_n_pages (view->document)
1152                             && (0 <= other_page)) {
1153                                 ev_view_get_page_size (view, other_page,
1154                                                        &width_2, &height_2);
1155                                 if (width_2 > width)
1156                                         max_width = width_2;
1157                                 if (height_2 > height)
1158                                         max_height = height_2;
1159                         }
1160                         compute_border (view, max_width, max_height, &overall_border);
1161
1162                         /* Find the offsets */
1163                         x = view->spacing;
1164                         y = view->spacing;
1165
1166                         /* Adjust for being the left or right page */
1167                         if (page % 2 == get_dual_even_left (view))
1168                                 x = x + max_width - width;
1169                         else
1170                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1171
1172                         y = y + (max_height - height)/2;
1173
1174                         /* Adjust for extra allocation */
1175                         x = x + MAX (0, allocation.width -
1176                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1177                         y = y + MAX (0, allocation.height - (height + view->spacing * 2))/2;
1178                 } else {
1179                         x = view->spacing;
1180                         y = view->spacing;
1181
1182                         /* Adjust for extra allocation */
1183                         x = x + MAX (0, allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1184                         y = y + MAX (0, allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1185                 }
1186
1187                 page_area->x = x;
1188                 page_area->y = y;
1189         }
1190
1191         return TRUE;
1192 }
1193
1194 static void
1195 get_doc_page_size (EvView  *view,
1196                    gint     page,
1197                    gdouble *width,
1198                    gdouble *height)
1199 {
1200         double w, h;
1201
1202         ev_document_get_page_size (view->document, page, &w, &h);
1203         if (view->rotation == 0 || view->rotation == 180) {
1204                 if (width) *width = w;
1205                 if (height) *height = h;
1206         } else {
1207                 if (width) *width = h;
1208                 if (height) *height = w;
1209         }
1210 }
1211
1212 static void
1213 view_point_to_doc_point (EvView *view,
1214                          GdkPoint *view_point,
1215                          GdkRectangle *page_area,
1216                          double  *doc_point_x,
1217                          double  *doc_point_y)
1218 {
1219         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1220         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1221 }
1222
1223 static void
1224 view_rect_to_doc_rect (EvView *view,
1225                        GdkRectangle *view_rect,
1226                        GdkRectangle *page_area,
1227                        EvRectangle  *doc_rect)
1228 {
1229         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1230         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1231         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1232         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1233 }
1234
1235 static void
1236 doc_point_to_view_point (EvView       *view,
1237                          int           page,
1238                          EvPoint      *doc_point,
1239                          GdkPoint     *view_point)
1240 {
1241         GdkRectangle page_area;
1242         GtkBorder border;
1243         double x, y, view_x, view_y;
1244         gdouble width, height;
1245
1246         get_doc_page_size (view, page, &width, &height);
1247
1248         if (view->rotation == 0) {
1249                 x = doc_point->x;
1250                 y = doc_point->y;
1251         } else if (view->rotation == 90) {
1252                 x = width - doc_point->y;
1253                 y = doc_point->x;
1254         } else if (view->rotation == 180) {
1255                 x = width - doc_point->x;
1256                 y = height - doc_point->y;
1257         } else if (view->rotation == 270) {
1258                 x = doc_point->y;
1259                 y = height - doc_point->x;
1260         } else {
1261                 g_assert_not_reached ();
1262         }
1263
1264         ev_view_get_page_extents (view, page, &page_area, &border);
1265
1266         view_x = CLAMP (x * view->scale, 0, page_area.width);
1267         view_y = CLAMP (y * view->scale, 0, page_area.height);
1268         view_point->x = view_x + page_area.x;
1269         view_point->y = view_y + page_area.y;
1270 }
1271
1272 static void
1273 doc_rect_to_view_rect (EvView       *view,
1274                        int           page,
1275                        EvRectangle  *doc_rect,
1276                        GdkRectangle *view_rect)
1277 {
1278         GdkRectangle page_area;
1279         GtkBorder border;
1280         double x, y, w, h;
1281         gdouble width, height;
1282
1283         get_doc_page_size (view, page, &width, &height);
1284
1285         if (view->rotation == 0) {
1286                 x = doc_rect->x1;
1287                 y = doc_rect->y1;
1288                 w = doc_rect->x2 - doc_rect->x1;
1289                 h = doc_rect->y2 - doc_rect->y1;
1290         } else if (view->rotation == 90) {
1291                 x = width - doc_rect->y2;
1292                 y = doc_rect->x1;
1293                 w = doc_rect->y2 - doc_rect->y1;
1294                 h = doc_rect->x2 - doc_rect->x1;
1295         } else if (view->rotation == 180) {
1296                 x = width - doc_rect->x2;
1297                 y = height - doc_rect->y2;
1298                 w = doc_rect->x2 - doc_rect->x1;
1299                 h = doc_rect->y2 - doc_rect->y1;
1300         } else if (view->rotation == 270) {
1301                 x = doc_rect->y1;
1302                 y = height - doc_rect->x2;
1303                 w = doc_rect->y2 - doc_rect->y1;
1304                 h = doc_rect->x2 - doc_rect->x1;
1305         } else {
1306                 g_assert_not_reached ();
1307         }
1308
1309         ev_view_get_page_extents (view, page, &page_area, &border);
1310
1311         view_rect->x = x * view->scale + page_area.x;
1312         view_rect->y = y * view->scale + page_area.y;
1313         view_rect->width = w * view->scale;
1314         view_rect->height = h * view->scale;
1315 }
1316
1317 static gboolean
1318 get_dual_even_left (EvView *view)
1319 {
1320         return (ev_document_get_n_pages (view->document) > 2);
1321 }
1322
1323 static void
1324 find_page_at_location (EvView  *view,
1325                        gdouble  x,
1326                        gdouble  y,
1327                        gint    *page,
1328                        gint    *x_offset,
1329                        gint    *y_offset)
1330 {
1331         int i;
1332
1333         if (view->document == NULL)
1334                 return;
1335
1336         g_assert (page);
1337         g_assert (x_offset);
1338         g_assert (y_offset);
1339
1340         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1341                 GdkRectangle page_area;
1342                 GtkBorder border;
1343
1344                 if (! ev_view_get_page_extents (view, i, &page_area, &border))
1345                         continue;
1346
1347                 if ((x >= page_area.x + border.left) &&
1348                     (x < page_area.x + page_area.width - border.right) &&
1349                     (y >= page_area.y + border.top) &&
1350                     (y < page_area.y + page_area.height - border.bottom)) {
1351                         *page = i;
1352                         *x_offset = x - (page_area.x + border.left);
1353                         *y_offset = y - (page_area.y + border.top);
1354                         return;
1355                 }
1356         }
1357
1358         *page = -1;
1359 }
1360
1361 static gboolean
1362 location_in_text (EvView  *view,
1363                   gdouble  x,
1364                   gdouble  y)
1365 {
1366         GdkRegion *region;
1367         gint page = -1;
1368         gint x_offset = 0, y_offset = 0;
1369
1370         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1371
1372         if (page == -1)
1373                 return FALSE;
1374
1375         region = ev_page_cache_get_text_mapping (view->page_cache, page);
1376
1377         if (region)
1378                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1379         else
1380                 return FALSE;
1381 }
1382
1383 static gboolean
1384 location_in_selected_text (EvView  *view,
1385                            gdouble  x,
1386                            gdouble  y)
1387 {
1388         gint page = -1;
1389         gint x_offset = 0, y_offset = 0;
1390         EvViewSelection *selection;
1391         GList *l = NULL;
1392
1393         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1394                 selection = (EvViewSelection *)l->data;
1395
1396                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1397
1398                 if (page != selection->page)
1399                         continue;
1400
1401                 if (selection->covered_region &&
1402                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1403                         return TRUE;
1404         }
1405
1406         return FALSE;
1407 }
1408
1409 static gboolean
1410 get_doc_point_from_offset (EvView *view,
1411                            gint    page,
1412                            gint    x_offset,
1413                            gint    y_offset,
1414                            gint   *x_new,
1415                            gint   *y_new)
1416 {
1417         gdouble width, height;
1418         double x, y;
1419
1420         get_doc_page_size (view, page, &width, &height);
1421
1422         x_offset = x_offset / view->scale;
1423         y_offset = y_offset / view->scale;
1424
1425         if (view->rotation == 0) {
1426                 x = x_offset;
1427                 y = y_offset;
1428         } else if (view->rotation == 90) {
1429                 x = y_offset;
1430                 y = width - x_offset;
1431         } else if (view->rotation == 180) {
1432                 x = width - x_offset;
1433                 y = height - y_offset;
1434         } else if (view->rotation == 270) {
1435                 x = height - y_offset;
1436                 y = x_offset;
1437         } else {
1438                 g_assert_not_reached ();
1439         }
1440
1441         *x_new = x;
1442         *y_new = y;
1443
1444         return TRUE;
1445 }
1446
1447 static gboolean
1448 get_doc_point_from_location (EvView  *view,
1449                              gdouble  x,
1450                              gdouble  y,
1451                              gint    *page,
1452                              gint    *x_new,
1453                              gint    *y_new)
1454 {
1455         gint x_offset = 0, y_offset = 0;
1456
1457         x += view->scroll_x;
1458         y += view->scroll_y;
1459         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1460         if (*page == -1)
1461                 return FALSE;
1462
1463         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1464 }
1465
1466 static void
1467 ev_view_get_area_from_mapping (EvView       *view,
1468                                guint         page,
1469                                GList        *mapping_list,
1470                                gconstpointer data,
1471                                GdkRectangle *area)
1472 {
1473         EvMapping *mapping;
1474
1475         mapping = ev_mapping_list_find (mapping_list, data);
1476         doc_rect_to_view_rect (view, page, &mapping->area, area);
1477         area->x -= view->scroll_x;
1478         area->y -= view->scroll_y;
1479 }
1480
1481
1482 /*** Hyperref ***/
1483 static EvLink *
1484 ev_view_get_link_at_location (EvView  *view,
1485                               gdouble  x,
1486                               gdouble  y)
1487 {
1488         gint page = -1;
1489         gint x_new = 0, y_new = 0;
1490         GList *link_mapping;
1491
1492         if (!EV_IS_DOCUMENT_LINKS (view->document))
1493                 return NULL;
1494
1495         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1496                 return NULL;
1497
1498         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
1499
1500         if (link_mapping)
1501                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1502         else
1503                 return NULL;
1504 }
1505
1506 static void
1507 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1508 {
1509         EvPoint doc_point;
1510         gdouble zoom, left, top;
1511         gboolean change_left, change_top;
1512         GtkAllocation allocation;
1513
1514         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1515
1516         left = ev_link_dest_get_left (dest, &change_left);
1517         top = ev_link_dest_get_top (dest, &change_top);
1518
1519         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1520                                        ev_link_dest_get_bottom (dest) - top,
1521                                        allocation.width,
1522                                        allocation.height);
1523
1524         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1525         ev_document_model_set_scale (view->model, zoom);
1526
1527         doc_point.x = change_left ? left : 0;
1528         doc_point.y = change_top ? top : 0;
1529         view->pending_point = doc_point;
1530
1531         ev_view_change_page (view, ev_link_dest_get_page (dest));
1532 }
1533
1534 static void
1535 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1536 {
1537         EvPoint doc_point;
1538         gdouble doc_width, doc_height;
1539         gint page;
1540         double zoom, left;
1541         gboolean change_left;
1542         GtkAllocation allocation;
1543
1544         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1545
1546         page = ev_link_dest_get_page (dest);
1547         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1548
1549         left = ev_link_dest_get_left (dest, &change_left);
1550         doc_point.x = change_left ? left : 0;
1551         doc_point.y = 0;
1552
1553         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1554                                          allocation.width,
1555                                          allocation.height);
1556
1557         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1558         ev_document_model_set_scale (view->model, zoom);
1559
1560         view->pending_point = doc_point;
1561
1562         ev_view_change_page (view, page);
1563 }
1564
1565 static void
1566 goto_fith_dest (EvView *view, EvLinkDest *dest)
1567 {
1568         EvPoint doc_point;
1569         gdouble doc_width, doc_height;
1570         gint page;
1571         gdouble zoom, top;
1572         gboolean change_top;
1573         GtkAllocation allocation;
1574
1575         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1576
1577         page = ev_link_dest_get_page (dest);
1578         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1579
1580         top = ev_link_dest_get_top (dest, &change_top);
1581
1582         doc_point.x = 0;
1583         doc_point.y = change_top ? top : 0;
1584
1585         zoom = zoom_for_size_fit_width (doc_width, top,
1586                                         allocation.width,
1587                                         allocation.height);
1588
1589         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1590         ev_document_model_set_scale (view->model, zoom);
1591
1592         view->pending_point = doc_point;
1593
1594         ev_view_change_page (view, page);
1595 }
1596
1597 static void
1598 goto_fit_dest (EvView *view, EvLinkDest *dest)
1599 {
1600         double zoom;
1601         gdouble doc_width, doc_height;
1602         int page;
1603         GtkAllocation allocation;
1604
1605         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1606
1607         page = ev_link_dest_get_page (dest);
1608         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1609
1610         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1611                                        allocation.width,
1612                                        allocation.height);
1613
1614         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1615         ev_document_model_set_scale (view->model, zoom);
1616
1617         ev_view_change_page (view, page);
1618 }
1619
1620 static void
1621 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1622 {
1623         EvPoint doc_point;
1624         gint page;
1625         gdouble zoom, left, top;
1626         gboolean change_zoom, change_left, change_top;
1627
1628         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1629         page = ev_link_dest_get_page (dest);
1630
1631         if (change_zoom && zoom > 1) {
1632                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1633                 ev_document_model_set_scale (view->model, zoom);
1634         }
1635
1636         left = ev_link_dest_get_left (dest, &change_left);
1637         top = ev_link_dest_get_top (dest, &change_top);
1638
1639         doc_point.x = change_left ? left : 0;
1640         doc_point.y = change_top ? top : 0;
1641         view->pending_point = doc_point;
1642
1643         ev_view_change_page (view, page);
1644 }
1645
1646 static void
1647 goto_dest (EvView *view, EvLinkDest *dest)
1648 {
1649         EvLinkDestType type;
1650         int page, n_pages, current_page;
1651
1652         page = ev_link_dest_get_page (dest);
1653         n_pages = ev_document_get_n_pages (view->document);
1654
1655         if (page < 0 || page >= n_pages)
1656                 return;
1657
1658         current_page = view->current_page;
1659
1660         type = ev_link_dest_get_dest_type (dest);
1661
1662         switch (type) {
1663                 case EV_LINK_DEST_TYPE_PAGE:
1664                         ev_document_model_set_page (view->model, page);
1665                         break;
1666                 case EV_LINK_DEST_TYPE_FIT:
1667                         goto_fit_dest (view, dest);
1668                         break;
1669                 case EV_LINK_DEST_TYPE_FITH:
1670                         goto_fith_dest (view, dest);
1671                         break;
1672                 case EV_LINK_DEST_TYPE_FITV:
1673                         goto_fitv_dest (view, dest);
1674                         break;
1675                 case EV_LINK_DEST_TYPE_FITR:
1676                         goto_fitr_dest (view, dest);
1677                         break;
1678                 case EV_LINK_DEST_TYPE_XYZ:
1679                         goto_xyz_dest (view, dest);
1680                         break;
1681                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1682                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1683                         break;
1684                 default:
1685                         g_assert_not_reached ();
1686         }
1687
1688         if (current_page != view->current_page)
1689                 ev_document_model_set_page (view->model, view->current_page);
1690 }
1691
1692 static void
1693 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1694 {
1695         EvLinkDestType type;
1696
1697         type = ev_link_dest_get_dest_type (dest);
1698
1699         if (type == EV_LINK_DEST_TYPE_NAMED) {
1700                 EvLinkDest  *dest2;
1701                 const gchar *named_dest;
1702
1703                 named_dest = ev_link_dest_get_named_dest (dest);
1704                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1705                                                           named_dest);
1706                 if (dest2) {
1707                         goto_dest (view, dest2);
1708                         g_object_unref (dest2);
1709                 }
1710
1711                 return;
1712         }
1713
1714         goto_dest (view, dest);
1715 }
1716
1717 void
1718 ev_view_handle_link (EvView *view, EvLink *link)
1719 {
1720         EvLinkAction    *action = NULL;
1721         EvLinkActionType type;
1722
1723         action = ev_link_get_action (link);
1724         if (!action)
1725                 return;
1726
1727         type = ev_link_action_get_action_type (action);
1728
1729         switch (type) {
1730                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1731                         EvLinkDest *dest;
1732
1733                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1734
1735                         dest = ev_link_action_get_dest (action);
1736                         ev_view_goto_dest (view, dest);
1737                 }
1738                         break;
1739                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1740                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1741                 case EV_LINK_ACTION_TYPE_LAUNCH:
1742                 case EV_LINK_ACTION_TYPE_NAMED:
1743                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1744                         break;
1745         }
1746 }
1747
1748 static char *
1749 tip_from_action_named (EvLinkAction *action)
1750 {
1751         const gchar *name = ev_link_action_get_name (action);
1752
1753         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1754                 return g_strdup (_("Go to first page"));
1755         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1756                 return g_strdup (_("Go to previous page"));
1757         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1758                 return g_strdup (_("Go to next page"));
1759         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1760                 return g_strdup (_("Go to last page"));
1761         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1762                 return g_strdup (_("Go to page"));
1763         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1764                 return g_strdup (_("Find"));
1765         }
1766
1767         return NULL;
1768 }
1769
1770 static char *
1771 tip_from_link (EvView *view, EvLink *link)
1772 {
1773         EvLinkAction *action;
1774         EvLinkActionType type;
1775         char *msg = NULL;
1776         char *page_label;
1777         const char *title;
1778
1779         action = ev_link_get_action (link);
1780         title = ev_link_get_title (link);
1781
1782         if (!action)
1783                 return title ? g_strdup (title) : NULL;
1784
1785         type = ev_link_action_get_action_type (action);
1786
1787         switch (type) {
1788                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1789                         page_label = ev_document_links_get_dest_page_label (EV_DOCUMENT_LINKS (view->document),
1790                                                                             ev_link_action_get_dest (action));
1791                         if (page_label) {
1792                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1793                                 g_free (page_label);
1794                         }
1795                         break;
1796                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1797                         if (title) {
1798                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1799                                                        ev_link_action_get_filename (action));
1800                         } else {
1801                                 msg = g_strdup_printf (_("Go to file “%s”"),
1802                                                        ev_link_action_get_filename (action));
1803                         }
1804                         break;
1805                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1806                         msg = g_strdup (ev_link_action_get_uri (action));
1807                         break;
1808                 case EV_LINK_ACTION_TYPE_LAUNCH:
1809                         msg = g_strdup_printf (_("Launch %s"),
1810                                                ev_link_action_get_filename (action));
1811                         break;
1812                 case EV_LINK_ACTION_TYPE_NAMED:
1813                         msg = tip_from_action_named (action);
1814                         break;
1815                 default:
1816                         if (title)
1817                                 msg = g_strdup (title);
1818                         break;
1819         }
1820
1821         return msg;
1822 }
1823
1824 static void
1825 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1826 {
1827         EvLink       *link;
1828         EvFormField  *field;
1829         EvAnnotation *annot = NULL;
1830
1831         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1832                 return;
1833
1834         if (view->drag_info.in_drag) {
1835                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1836                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1837                 return;
1838         }
1839
1840         if (view->scroll_info.autoscrolling) {
1841                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1842                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1843                 return;
1844         }
1845
1846         link = ev_view_get_link_at_location (view, x, y);
1847         if (link) {
1848                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1849         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1850                 if (field->is_read_only) {
1851                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1852                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1853                             view->cursor == EV_VIEW_CURSOR_DRAG)
1854                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1855                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1856                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1857                 } else {
1858                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1859                 }
1860         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1861                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1862         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1863                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1864         } else {
1865                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1866                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1867                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1868                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1869                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1870         }
1871
1872         if (link || annot)
1873                 g_object_set (view, "has-tooltip", TRUE, NULL);
1874 }
1875
1876 /*** Images ***/
1877 static EvImage *
1878 ev_view_get_image_at_location (EvView  *view,
1879                                gdouble  x,
1880                                gdouble  y)
1881 {
1882         gint page = -1;
1883         gint x_new = 0, y_new = 0;
1884         GList *image_mapping;
1885
1886         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1887                 return NULL;
1888
1889         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1890                 return NULL;
1891
1892         image_mapping = ev_page_cache_get_image_mapping (view->page_cache, page);
1893
1894         if (image_mapping)
1895                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1896         else
1897                 return NULL;
1898 }
1899
1900 /*** Forms ***/
1901 static EvFormField *
1902 ev_view_get_form_field_at_location (EvView  *view,
1903                                     gdouble  x,
1904                                     gdouble  y)
1905 {
1906         gint page = -1;
1907         gint x_new = 0, y_new = 0;
1908         GList *forms_mapping;
1909
1910         if (!EV_IS_DOCUMENT_FORMS (view->document))
1911                 return NULL;
1912
1913         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1914                 return NULL;
1915
1916         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache, page);
1917
1918         if (forms_mapping)
1919                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1920         else
1921                 return NULL;
1922 }
1923
1924 static GdkRegion *
1925 ev_view_form_field_get_region (EvView      *view,
1926                                EvFormField *field)
1927 {
1928         GdkRectangle view_area;
1929         GList       *forms_mapping;
1930
1931         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
1932                                                               field->page->index);
1933         ev_view_get_area_from_mapping (view, field->page->index,
1934                                        forms_mapping,
1935                                        field, &view_area);
1936
1937         return gdk_region_rectangle (&view_area);
1938 }
1939
1940 static gboolean
1941 ev_view_forms_remove_widgets (EvView *view)
1942 {
1943         ev_view_remove_all (view);
1944
1945         return FALSE;
1946 }
1947
1948 static void
1949 ev_view_form_field_destroy (GtkWidget *widget,
1950                             EvView    *view)
1951 {
1952         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1953 }
1954
1955 static GtkWidget *
1956 ev_view_form_field_button_create_widget (EvView      *view,
1957                                          EvFormField *field)
1958 {
1959         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1960         GdkRegion         *field_region = NULL;
1961
1962         switch (field_button->type) {
1963                 case EV_FORM_FIELD_BUTTON_PUSH:
1964                         return NULL;
1965                 case EV_FORM_FIELD_BUTTON_CHECK:
1966                 case EV_FORM_FIELD_BUTTON_RADIO: {
1967                         gboolean  state;
1968                         GList    *forms_mapping, *l;
1969
1970                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1971                                                                                field);
1972
1973                         /* FIXME: it actually depends on NoToggleToOff flags */
1974                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1975                             state && field_button->state)
1976                                 return NULL;
1977
1978                         field_region = ev_view_form_field_get_region (view, field);
1979
1980                         /* For radio buttons and checkbox buttons that are in a set
1981                          * we need to update also the region for the current selected item
1982                          */
1983                         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
1984                                                                               field->page->index);
1985                         for (l = forms_mapping; l; l = g_list_next (l)) {
1986                                 EvFormField *button = ((EvMapping *)(l->data))->data;
1987                                 GdkRegion   *button_region;
1988
1989                                 if (button->id == field->id)
1990                                         continue;
1991
1992                                 /* FIXME: only buttons in the same group should be updated */
1993                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1994                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1995                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1996                                         continue;
1997
1998                                 button_region = ev_view_form_field_get_region (view, button);
1999                                 gdk_region_union (field_region, button_region);
2000                                 gdk_region_destroy (button_region);
2001                         }
2002
2003                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
2004                                                                        field, !state);
2005                         field_button->state = !state;
2006                 }
2007                         break;
2008         }
2009
2010         ev_view_reload_page (view, field->page->index, field_region);
2011         gdk_region_destroy (field_region);
2012
2013         return NULL;
2014 }
2015
2016 static void
2017 ev_view_form_field_text_save (EvView    *view,
2018                               GtkWidget *widget)
2019 {
2020         EvFormField *field;
2021
2022         if (!view->document)
2023                 return;
2024
2025         field = g_object_get_data (G_OBJECT (widget), "form-field");
2026
2027         if (field->changed) {
2028                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2029                 GdkRegion       *field_region;
2030
2031                 field_region = ev_view_form_field_get_region (view, field);
2032
2033                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
2034                                                             field, field_text->text);
2035                 field->changed = FALSE;
2036                 ev_view_reload_page (view, field->page->index, field_region);
2037                 gdk_region_destroy (field_region);
2038         }
2039 }
2040
2041 static void
2042 ev_view_form_field_text_changed (GtkWidget   *widget,
2043                                  EvFormField *field)
2044 {
2045         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2046         gchar           *text = NULL;
2047
2048         if (GTK_IS_ENTRY (widget)) {
2049                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
2050         } else if (GTK_IS_TEXT_BUFFER (widget)) {
2051                 GtkTextIter start, end;
2052
2053                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
2054                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
2055                                                  &start, &end, FALSE);
2056         }
2057
2058         if (!field_text->text ||
2059             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
2060                 g_free (field_text->text);
2061                 field_text->text = text;
2062                 field->changed = TRUE;
2063         }
2064 }
2065
2066 static GtkWidget *
2067 ev_view_form_field_text_create_widget (EvView      *view,
2068                                        EvFormField *field)
2069 {
2070         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2071         GtkWidget       *text = NULL;
2072         gchar           *txt;
2073
2074         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2075                                                           field);
2076
2077         switch (field_text->type) {
2078                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2079                         /* TODO */
2080                 case EV_FORM_FIELD_TEXT_NORMAL:
2081                         text = gtk_entry_new ();
2082                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2083                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2084                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2085
2086                         if (txt) {
2087                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2088                                 g_free (txt);
2089                         }
2090
2091                         g_signal_connect (text, "changed",
2092                                           G_CALLBACK (ev_view_form_field_text_changed),
2093                                           field);
2094                         g_signal_connect_after (text, "activate",
2095                                                 G_CALLBACK (ev_view_form_field_destroy),
2096                                                 view);
2097                         break;
2098                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2099                         GtkTextBuffer *buffer;
2100
2101                         text = gtk_text_view_new ();
2102                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2103
2104                         if (txt) {
2105                                 gtk_text_buffer_set_text (buffer, txt, -1);
2106                                 g_free (txt);
2107                         }
2108
2109                         g_signal_connect (buffer, "changed",
2110                                           G_CALLBACK (ev_view_form_field_text_changed),
2111                                           field);
2112                 }
2113                         break;
2114         }
2115
2116         g_object_weak_ref (G_OBJECT (text),
2117                            (GWeakNotify)ev_view_form_field_text_save,
2118                            view);
2119
2120         return text;
2121 }
2122
2123 static void
2124 ev_view_form_field_choice_save (EvView    *view,
2125                                 GtkWidget *widget)
2126 {
2127         EvFormField *field;
2128
2129         if (!view->document)
2130                 return;
2131
2132         field = g_object_get_data (G_OBJECT (widget), "form-field");
2133
2134         if (field->changed) {
2135                 GList             *l;
2136                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2137                 GdkRegion         *field_region;
2138
2139                 field_region = ev_view_form_field_get_region (view, field);
2140
2141                 if (field_choice->is_editable) {
2142                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2143                                                                       field, field_choice->text);
2144                 } else {
2145                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2146                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2147                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2148                                                                                  field,
2149                                                                                  GPOINTER_TO_INT (l->data));
2150                         }
2151                 }
2152                 field->changed = FALSE;
2153                 ev_view_reload_page (view, field->page->index, field_region);
2154                 gdk_region_destroy (field_region);
2155         }
2156 }
2157
2158 static void
2159 ev_view_form_field_choice_changed (GtkWidget   *widget,
2160                                    EvFormField *field)
2161 {
2162         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2163
2164         if (GTK_IS_COMBO_BOX (widget)) {
2165                 gint item;
2166
2167                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2168                 if (!field_choice->selected_items ||
2169                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2170                         g_list_free (field_choice->selected_items);
2171                         field_choice->selected_items = NULL;
2172                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2173                                                                        GINT_TO_POINTER (item));
2174                         field->changed = TRUE;
2175                 }
2176
2177                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
2178                         gchar *text;
2179
2180                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
2181                         if (!field_choice->text ||
2182                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2183                                 g_free (field_choice->text);
2184                                 field_choice->text = text;
2185                                 field->changed = TRUE;
2186                         }
2187                 }
2188         } else if (GTK_IS_TREE_SELECTION (widget)) {
2189                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2190                 GtkTreeModel     *model;
2191                 GList            *items, *l;
2192
2193                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2194                 g_list_free (field_choice->selected_items);
2195                 field_choice->selected_items = NULL;
2196
2197                 for (l = items; l && l->data; l = g_list_next (l)) {
2198                         GtkTreeIter  iter;
2199                         GtkTreePath *path = (GtkTreePath *)l->data;
2200                         gint         item;
2201
2202                         gtk_tree_model_get_iter (model, &iter, path);
2203                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2204
2205                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2206                                                                        GINT_TO_POINTER (item));
2207
2208                         gtk_tree_path_free (path);
2209                 }
2210
2211                 g_list_free (items);
2212
2213                 field->changed = TRUE;
2214         }
2215 }
2216
2217 static GtkWidget *
2218 ev_view_form_field_choice_create_widget (EvView      *view,
2219                                          EvFormField *field)
2220 {
2221         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2222         GtkWidget         *choice;
2223         GtkTreeModel      *model;
2224         gint               n_items, i;
2225         gint               selected_item = 0;
2226
2227         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2228                                                                    field);
2229         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2230         for (i = 0; i < n_items; i++) {
2231                 GtkTreeIter iter;
2232                 gchar      *item;
2233
2234                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2235                                                                      field, i);
2236                 if (ev_document_forms_form_field_choice_is_item_selected (
2237                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2238                         selected_item = i;
2239                         /* FIXME: we need a get_selected_items function in poppler */
2240                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2241                                                                        GINT_TO_POINTER (i));
2242                 }
2243
2244                 if (item) {
2245                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2246                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2247                                             0, item,
2248                                             1, i,
2249                                             -1);
2250                         g_free (item);
2251                 }
2252         }
2253
2254         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2255                 GtkCellRenderer  *renderer;
2256                 GtkWidget        *tree_view;
2257                 GtkTreeSelection *selection;
2258
2259                 tree_view = gtk_tree_view_new_with_model (model);
2260                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2261
2262                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2263                 if (field_choice->multi_select) {
2264                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2265                 }
2266
2267                 /* TODO: set selected items */
2268
2269                 renderer = gtk_cell_renderer_text_new ();
2270                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2271                                                              0,
2272                                                              "choix", renderer,
2273                                                              "text", 0,
2274                                                              NULL);
2275
2276                 choice = gtk_scrolled_window_new (NULL, NULL);
2277                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2278                                                 GTK_POLICY_AUTOMATIC,
2279                                                 GTK_POLICY_AUTOMATIC);
2280                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2281                 gtk_widget_show (tree_view);
2282
2283                 g_signal_connect (selection, "changed",
2284                                   G_CALLBACK (ev_view_form_field_choice_changed),
2285                                   field);
2286                 g_signal_connect_after (selection, "changed",
2287                                         G_CALLBACK (ev_view_form_field_destroy),
2288                                         view);
2289         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2290                 gchar *text;
2291
2292                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2293                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2294                 if (text) {
2295                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2296                         g_free (text);
2297                 }
2298
2299                 g_signal_connect (choice, "changed",
2300                                   G_CALLBACK (ev_view_form_field_choice_changed),
2301                                   field);
2302                 g_signal_connect_after (gtk_bin_get_child (GTK_BIN (choice)),
2303                                         "activate",
2304                                         G_CALLBACK (ev_view_form_field_destroy),
2305                                         view);
2306         } else { /* ComboBoxText */
2307                 GtkCellRenderer *renderer;
2308
2309                 choice = gtk_combo_box_new_with_model (model);
2310                 renderer = gtk_cell_renderer_text_new ();
2311                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2312                                             renderer, TRUE);
2313                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2314                                                 renderer,
2315                                                 "text", 0,
2316                                                 NULL);
2317                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2318                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2319
2320                 g_signal_connect (choice, "changed",
2321                                   G_CALLBACK (ev_view_form_field_choice_changed),
2322                                   field);
2323                 g_signal_connect_after (choice, "changed",
2324                                         G_CALLBACK (ev_view_form_field_destroy),
2325                                         view);
2326         }
2327
2328         g_object_unref (model);
2329
2330         g_object_weak_ref (G_OBJECT (choice),
2331                            (GWeakNotify)ev_view_form_field_choice_save,
2332                            view);
2333
2334         return choice;
2335 }
2336
2337 static void
2338 ev_view_handle_form_field (EvView      *view,
2339                            EvFormField *field,
2340                            gdouble      x,
2341                            gdouble      y)
2342 {
2343         GtkWidget   *field_widget = NULL;
2344         GList       *form_field_mapping;
2345         GdkRectangle view_area;
2346
2347         if (field->is_read_only)
2348                 return;
2349
2350         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2351                 field_widget = ev_view_form_field_button_create_widget (view, field);
2352         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2353                 field_widget = ev_view_form_field_text_create_widget (view, field);
2354         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2355                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2356         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2357                 /* TODO */
2358         }
2359
2360         /* Form field doesn't require a widget */
2361         if (!field_widget)
2362                 return;
2363
2364         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2365                                 g_object_ref (field),
2366                                 (GDestroyNotify)g_object_unref);
2367
2368         form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2369                                                                    field->page->index);
2370         ev_view_get_area_from_mapping (view, field->page->index,
2371                                        form_field_mapping,
2372                                        field, &view_area);
2373
2374         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2375         gtk_widget_show (field_widget);
2376         gtk_widget_grab_focus (field_widget);
2377 }
2378
2379 /* Annotations */
2380 static EvViewWindowChild *
2381 ev_view_get_window_child (EvView    *view,
2382                           GtkWidget *window)
2383 {
2384         GList *children = view->window_children;
2385
2386         while (children) {
2387                 EvViewWindowChild *child;
2388
2389                 child = (EvViewWindowChild *)children->data;
2390                 children = children->next;
2391
2392                 if (child->window == window)
2393                         return child;
2394         }
2395
2396         return NULL;
2397 }
2398
2399 static void
2400 ev_view_window_child_move (EvView            *view,
2401                            EvViewWindowChild *child,
2402                            gint               x,
2403                            gint               y)
2404 {
2405         child->x = x;
2406         child->y = y;
2407         gtk_window_move (GTK_WINDOW (child->window),
2408                          MAX (child->parent_x, x),
2409                          MAX (child->parent_y, y));
2410 }
2411
2412 static void
2413 ev_view_window_child_move_with_parent (EvView    *view,
2414                                        GtkWidget *window)
2415 {
2416         EvViewWindowChild *child;
2417         gint               root_x, root_y;
2418
2419         child = ev_view_get_window_child (view, window);
2420         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2421                                &root_x, &root_y);
2422         if (root_x != child->parent_x || root_y != child->parent_y) {
2423                 gint dest_x, dest_y;
2424
2425                 dest_x = child->x + (root_x - child->parent_x);
2426                 dest_y = child->y + (root_y - child->parent_y);
2427                 child->parent_x = root_x;
2428                 child->parent_y = root_y;
2429                 ev_view_window_child_move (view, child, dest_x, dest_y);
2430         }
2431
2432         if (child->visible && !gtk_widget_get_visible (window))
2433                 gtk_widget_show (window);
2434 }
2435
2436 static void
2437 ev_view_window_child_put (EvView    *view,
2438                           GtkWidget *window,
2439                           guint      page,
2440                           gint       x,
2441                           gint       y,
2442                           gdouble    orig_x,
2443                           gdouble    orig_y)
2444 {
2445         EvViewWindowChild *child;
2446         gint               root_x, root_y;
2447
2448         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2449                                &root_x, &root_y);
2450
2451         child = g_new0 (EvViewWindowChild, 1);
2452         child->window = window;
2453         child->page = page;
2454         child->orig_x = orig_x;
2455         child->orig_y = orig_y;
2456         child->parent_x = root_x;
2457         child->parent_y = root_y;
2458         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2459         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2460
2461         if (child->visible)
2462                 gtk_widget_show (window);
2463         else
2464                 gtk_widget_hide (window);
2465
2466         view->window_children = g_list_append (view->window_children, child);
2467 }
2468
2469 static EvViewWindowChild *
2470 ev_view_find_window_child_for_annot (EvView       *view,
2471                                      guint         page,
2472                                      EvAnnotation *annot)
2473 {
2474         GList *children = view->window_children;
2475
2476         while (children) {
2477                 EvViewWindowChild *child;
2478                 EvAnnotation      *wannot;
2479
2480                 child = (EvViewWindowChild *)children->data;
2481                 children = children->next;
2482
2483                 if (child->page != page)
2484                         continue;
2485
2486                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2487                 if (wannot == annot || strcmp (wannot->name, annot->name) == 0)
2488                         return child;
2489         }
2490
2491         return NULL;
2492 }
2493
2494 static void
2495 ev_view_window_children_free (EvView *view)
2496 {
2497         GList *l;
2498
2499         if (!view->window_children)
2500                 return;
2501
2502         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2503                 EvViewWindowChild *child;
2504
2505                 child = (EvViewWindowChild *)l->data;
2506                 gtk_widget_destroy (GTK_WIDGET (child->window));
2507                 g_free (child);
2508         }
2509         g_list_free (view->window_children);
2510         view->window_children = NULL;
2511         view->window_child_focus = NULL;
2512 }
2513
2514 static void
2515 annotation_window_grab_focus (GtkWidget *widget,
2516                               EvView    *view)
2517 {
2518         if (view->window_child_focus)
2519                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2520         view->window_child_focus = ev_view_get_window_child (view, widget);
2521 }
2522
2523 static void
2524 annotation_window_closed (EvAnnotationWindow *window,
2525                           EvView             *view)
2526 {
2527         EvViewWindowChild *child;
2528
2529         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2530         child->visible = FALSE;
2531 }
2532
2533 static void
2534 annotation_window_moved (EvAnnotationWindow *window,
2535                          gint                x,
2536                          gint                y,
2537                          EvView             *view)
2538 {
2539         EvViewWindowChild *child;
2540         GdkRectangle       page_area;
2541         GtkBorder          border;
2542         GdkRectangle       view_rect;
2543         EvRectangle        doc_rect;
2544         gint               width, height;
2545
2546         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2547         if (child->x == x && child->y == y)
2548                 return;
2549
2550         child->moved = TRUE;
2551         child->x = x;
2552         child->y = y;
2553
2554         /* Window has been moved by the user,
2555          * we have to set a new origin in doc coords
2556          */
2557         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2558         view_rect.x = (x - child->parent_x) + view->scroll_x;
2559         view_rect.y = (y - child->parent_y) + view->scroll_y;
2560         view_rect.width = width;
2561         view_rect.height = height;
2562
2563         ev_view_get_page_extents (view, child->page, &page_area, &border);
2564         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2565         child->orig_x = doc_rect.x1;
2566         child->orig_y = doc_rect.y1;
2567 }
2568
2569 static void
2570 ev_view_annotation_save (EvView       *view,
2571                          EvAnnotation *annot)
2572 {
2573         if (!view->document)
2574                 return;
2575
2576         if (!annot->changed)
2577                 return;
2578
2579         ev_document_annotations_annotation_set_contents (EV_DOCUMENT_ANNOTATIONS (view->document),
2580                                                          annot, annot->contents);
2581         annot->changed = FALSE;
2582 }
2583
2584 static void
2585 show_annotation_windows (EvView *view,
2586                          gint    page)
2587 {
2588         GList     *annots, *l;
2589         GtkWindow *parent;
2590
2591         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2592
2593         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2594
2595         for (l = annots; l && l->data; l = g_list_next (l)) {
2596                 EvAnnotation      *annot;
2597                 EvViewWindowChild *child;
2598                 GtkWidget         *window;
2599                 EvRectangle       *doc_rect;
2600                 GdkRectangle       view_rect;
2601
2602                 annot = ((EvMapping *)(l->data))->data;
2603
2604                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2605                         continue;
2606
2607                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2608                         continue;
2609
2610                 window = g_object_get_data (G_OBJECT (annot), "popup");
2611                 if (window) {
2612                         ev_view_window_child_move_with_parent (view, window);
2613                         continue;
2614                 }
2615
2616                 /* Look if we already have a popup for this annot */
2617                 child = ev_view_find_window_child_for_annot (view, page, annot);
2618                 window = child ? child->window : NULL;
2619                 if (window) {
2620                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2621                         g_object_set_data (G_OBJECT (annot), "popup", window);
2622                         ev_view_window_child_move_with_parent (view, window);
2623                 } else {
2624                         window = ev_annotation_window_new (annot, parent);
2625                         g_signal_connect (window, "grab_focus",
2626                                           G_CALLBACK (annotation_window_grab_focus),
2627                                           view);
2628                         g_signal_connect (window, "closed",
2629                                           G_CALLBACK (annotation_window_closed),
2630                                           view);
2631                         g_signal_connect (window, "moved",
2632                                           G_CALLBACK (annotation_window_moved),
2633                                           view);
2634                         g_object_set_data (G_OBJECT (annot), "popup", window);
2635
2636                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2637                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2638                         view_rect.x -= view->scroll_x;
2639                         view_rect.y -= view->scroll_y;
2640
2641                         ev_view_window_child_put (view, window, page,
2642                                                   view_rect.x, view_rect.y,
2643                                                   doc_rect->x1, doc_rect->y1);
2644
2645                         g_object_weak_ref (G_OBJECT (annot),
2646                                            (GWeakNotify)ev_view_annotation_save,
2647                                            view);
2648                 }
2649         }
2650 }
2651
2652 static void
2653 hide_annotation_windows (EvView *view,
2654                          gint    page)
2655 {
2656         GList *annots, *l;
2657
2658         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2659
2660         for (l = annots; l && l->data; l = g_list_next (l)) {
2661                 EvAnnotation *annot;
2662                 GtkWidget    *window;
2663
2664                 annot = ((EvMapping *)(l->data))->data;
2665
2666                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2667                         continue;
2668
2669                 window = g_object_get_data (G_OBJECT (annot), "popup");
2670                 if (window)
2671                         gtk_widget_hide (window);
2672         }
2673 }
2674
2675 static EvAnnotation *
2676 ev_view_get_annotation_at_location (EvView  *view,
2677                                     gdouble  x,
2678                                     gdouble  y)
2679 {
2680         gint page = -1;
2681         gint x_new = 0, y_new = 0;
2682         GList *annotations_mapping;
2683
2684         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2685                 return NULL;
2686
2687         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2688                 return NULL;
2689
2690         annotations_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
2691
2692         if (annotations_mapping)
2693                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2694         else
2695                 return NULL;
2696 }
2697
2698 static void
2699 ev_view_handle_annotation (EvView       *view,
2700                            EvAnnotation *annot,
2701                            gdouble       x,
2702                            gdouble       y,
2703                            guint32       timestamp)
2704 {
2705         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2706                 GtkWidget *window;
2707
2708                 window = g_object_get_data (G_OBJECT (annot), "popup");
2709                 if (window) {
2710                         EvViewWindowChild *child;
2711
2712                         child = ev_view_get_window_child (view, window);
2713                         if (!child->visible) {
2714                                 child->visible = TRUE;
2715                                 ev_view_window_child_move (view, child, child->x, child->y);
2716                                 gtk_widget_show (window);
2717                         }
2718                 }
2719         }
2720
2721         if (EV_IS_ANNOTATION_ATTACHMENT (annot)) {
2722                 EvAttachment *attachment = EV_ANNOTATION_ATTACHMENT (annot)->attachment;
2723
2724                 if (attachment) {
2725                         GError *error = NULL;
2726
2727                         ev_attachment_open (attachment,
2728                                             gtk_widget_get_screen (GTK_WIDGET (view)),
2729                                             timestamp,
2730                                             &error);
2731
2732                         if (error) {
2733                                 g_warning ("%s", error->message);
2734                                 g_error_free (error);
2735                         }
2736                 }
2737         }
2738 }
2739
2740 static gboolean
2741 ev_view_synctex_backward_search (EvView *view,
2742                                  gdouble x,
2743                                  gdouble y)
2744 {
2745         gint page = -1;
2746         gint x_new = 0, y_new = 0;
2747         EvSourceLink *link;
2748
2749         if (!ev_document_has_synctex (view->document))
2750                 return FALSE;
2751
2752         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2753                 return FALSE;
2754
2755         link = ev_document_synctex_backward_search (view->document, page, x_new, y_new);
2756         if (link) {
2757                 g_signal_emit (view, signals[SIGNAL_SYNC_SOURCE], 0, link);
2758                 g_free (link);
2759
2760                 return TRUE;
2761         }
2762
2763         return FALSE;
2764 }
2765
2766 /*** GtkWidget implementation ***/
2767
2768 static void
2769 ev_view_size_request_continuous_dual_page (EvView         *view,
2770                                            GtkRequisition *requisition)
2771 {
2772         gint n_pages;
2773
2774         n_pages = ev_document_get_n_pages (view->document) + 1;
2775         get_page_y_offset (view, n_pages, &requisition->height);
2776
2777         switch (view->sizing_mode) {
2778                 case EV_SIZING_FIT_WIDTH:
2779                 case EV_SIZING_BEST_FIT:
2780                         requisition->width = 1;
2781
2782                         break;
2783                 case EV_SIZING_FREE: {
2784                         gint max_width;
2785                         GtkBorder border;
2786
2787                         ev_view_get_max_page_size (view, &max_width, NULL);
2788                         compute_border (view, max_width, max_width, &border);
2789                         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2790                 }
2791                         break;
2792                 default:
2793                         g_assert_not_reached ();
2794         }
2795 }
2796
2797 static void
2798 ev_view_size_request_continuous (EvView         *view,
2799                                  GtkRequisition *requisition)
2800 {
2801         gint n_pages;
2802
2803         n_pages = ev_document_get_n_pages (view->document);
2804         get_page_y_offset (view, n_pages, &requisition->height);
2805
2806         switch (view->sizing_mode) {
2807                 case EV_SIZING_FIT_WIDTH:
2808                 case EV_SIZING_BEST_FIT:
2809                         requisition->width = 1;
2810
2811                         break;
2812                 case EV_SIZING_FREE: {
2813                         gint max_width;
2814                         GtkBorder border;
2815
2816                         ev_view_get_max_page_size (view, &max_width, NULL);
2817                         compute_border (view, max_width, max_width, &border);
2818                         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2819                 }
2820                         break;
2821                 default:
2822                         g_assert_not_reached ();
2823         }
2824 }
2825
2826 static void
2827 ev_view_size_request_dual_page (EvView         *view,
2828                                 GtkRequisition *requisition)
2829 {
2830         GtkBorder border;
2831         gint width, height;
2832
2833         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2834                 requisition->width = 1;
2835                 requisition->height = 1;
2836
2837                 return;
2838         }
2839
2840         /* Find the largest of the two. */
2841         ev_view_get_page_size (view,
2842                                view->current_page,
2843                                &width, &height);
2844         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
2845                 gint width_2, height_2;
2846                 ev_view_get_page_size (view,
2847                                        view->current_page + 1,
2848                                        &width_2, &height_2);
2849                 if (width_2 > width) {
2850                         width = width_2;
2851                         height = height_2;
2852                 }
2853         }
2854         compute_border (view, width, height, &border);
2855
2856         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
2857                 ((width + border.left + border.right) * 2) + (view->spacing * 3);
2858         requisition->height = (height + border.top + border.bottom) + (view->spacing * 2);
2859 }
2860
2861 static void
2862 ev_view_size_request_single_page (EvView         *view,
2863                                   GtkRequisition *requisition)
2864 {
2865         GtkBorder border;
2866         gint width, height;
2867
2868         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2869                 requisition->width = 1;
2870                 requisition->height = 1;
2871
2872                 return;
2873         }
2874
2875         ev_view_get_page_size (view, view->current_page, &width, &height);
2876         compute_border (view, width, height, &border);
2877
2878         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
2879                 width + border.left + border.right + (2 * view->spacing);
2880         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2881 }
2882
2883 static void
2884 ev_view_size_request (GtkWidget      *widget,
2885                       GtkRequisition *requisition)
2886 {
2887         EvView *view = EV_VIEW (widget);
2888
2889         if (view->document == NULL) {
2890                 view->requisition.width = 1;
2891                 view->requisition.height = 1;
2892
2893                 *requisition = view->requisition;
2894
2895                 return;
2896         }
2897
2898         /* Get zoom for size here when not called from
2899          * ev_view_size_allocate()
2900          */
2901         if (!view->internal_size_request &&
2902             (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2903              view->sizing_mode == EV_SIZING_BEST_FIT)) {
2904                 GtkAllocation allocation;
2905
2906                 gtk_widget_get_allocation (widget, &allocation);
2907                 ev_view_zoom_for_size (view,
2908                                        allocation.width,
2909                                        allocation.height);
2910         }
2911
2912         if (view->continuous && view->dual_page)
2913                 ev_view_size_request_continuous_dual_page (view, &view->requisition);
2914         else if (view->continuous)
2915                 ev_view_size_request_continuous (view, &view->requisition);
2916         else if (view->dual_page)
2917                 ev_view_size_request_dual_page (view, &view->requisition);
2918         else
2919                 ev_view_size_request_single_page (view, &view->requisition);
2920
2921         *requisition = view->requisition;
2922 }
2923
2924 static void
2925 ev_view_size_allocate (GtkWidget      *widget,
2926                        GtkAllocation  *allocation)
2927 {
2928         EvView *view = EV_VIEW (widget);
2929         GList  *children, *l;
2930         gint    root_x, root_y;
2931
2932         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2933
2934         if (!view->document)
2935                 return;
2936
2937         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2938             view->sizing_mode == EV_SIZING_BEST_FIT) {
2939                 GtkRequisition req;
2940
2941                 ev_view_zoom_for_size (view,
2942                                        allocation->width,
2943                                        allocation->height);
2944                 view->internal_size_request = TRUE;
2945                 ev_view_size_request (widget, &req);
2946                 view->internal_size_request = FALSE;
2947         }
2948
2949         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2950         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2951
2952         if (view->document)
2953                 view_update_range_and_current_page (view);
2954
2955         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2956         view->pending_resize = FALSE;
2957         view->pending_point.x = 0;
2958         view->pending_point.y = 0;
2959
2960         children = gtk_container_get_children (GTK_CONTAINER (widget));
2961         for (l = children; l && l->data; l = g_list_next (l)) {
2962                 EvFormField   *field;
2963                 GdkRectangle   view_area;
2964                 GList         *form_field_mapping;
2965                 GtkAllocation  child_allocation;
2966                 GtkRequisition child_requisition;
2967                 GtkWidget     *child = (GtkWidget *)l->data;
2968
2969                 field = g_object_get_data (G_OBJECT (child), "form-field");
2970                 if (!field)
2971                         continue;
2972
2973                 form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2974                                                                            field->page->index);
2975                 ev_view_get_area_from_mapping (view, field->page->index,
2976                                                form_field_mapping,
2977                                                field, &view_area);
2978
2979                 gtk_widget_size_request (child, &child_requisition);
2980                 if (child_requisition.width != view_area.width ||
2981                     child_requisition.height != view_area.height)
2982                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2983
2984                 gtk_container_child_get (GTK_CONTAINER (widget),
2985                                          child,
2986                                          "x", &child_allocation.x,
2987                                          "y", &child_allocation.y,
2988                                          NULL);
2989                 if (child_allocation.x != view_area.x ||
2990                     child_allocation.y != view_area.y) {
2991                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2992                 }
2993         }
2994         g_list_free (children);
2995
2996         if (view->window_children)
2997                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2998                                        &root_x, &root_y);
2999
3000         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
3001                 EvViewWindowChild *child;
3002                 EvRectangle        doc_rect;
3003                 GdkRectangle       view_rect;
3004
3005                 child = (EvViewWindowChild *)l->data;
3006
3007                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
3008                 if (child->moved) {
3009                         doc_rect.x1 = child->orig_x;
3010                         doc_rect.y1 = child->orig_y;
3011                 }
3012                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
3013                 view_rect.x -= view->scroll_x;
3014                 view_rect.y -= view->scroll_y;
3015
3016                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
3017                         child->parent_x = root_x;
3018                         child->parent_y = root_y;
3019                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
3020                 }
3021         }
3022 }
3023
3024 static void
3025 ev_view_realize (GtkWidget *widget)
3026 {
3027         EvView    *view = EV_VIEW (widget);
3028         GdkWindow *bin_window;
3029         GtkStyle  *style;
3030
3031         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
3032                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
3033
3034         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3035         gdk_window_set_events (bin_window,
3036                                (gdk_window_get_events (bin_window) |
3037                                 GDK_EXPOSURE_MASK |
3038                                 GDK_BUTTON_PRESS_MASK |
3039                                 GDK_BUTTON_RELEASE_MASK |
3040                                 GDK_SCROLL_MASK |
3041                                 GDK_KEY_PRESS_MASK |
3042                                 GDK_POINTER_MOTION_MASK |
3043                                 GDK_POINTER_MOTION_HINT_MASK |
3044                                 GDK_ENTER_NOTIFY_MASK |
3045                                 GDK_LEAVE_NOTIFY_MASK));
3046
3047         style = gtk_widget_get_style (widget);
3048         gdk_window_set_background (bin_window, &style->mid[GTK_STATE_NORMAL]);
3049
3050         on_adjustment_value_changed (NULL, view);
3051 }
3052
3053 static gboolean
3054 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
3055 {
3056         EvView *view = EV_VIEW (widget);
3057         guint state;
3058
3059         state = event->state & gtk_accelerator_get_default_mod_mask ();
3060
3061         if (state == GDK_CONTROL_MASK) {
3062                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
3063                 if (event->direction == GDK_SCROLL_UP ||
3064                     event->direction == GDK_SCROLL_LEFT) {
3065                         if (ev_view_can_zoom_in (view)) {
3066                                 ev_view_zoom_in (view);
3067                         }
3068                 } else {
3069                         if (ev_view_can_zoom_out (view)) {
3070                                 ev_view_zoom_out (view);
3071                         }
3072                 }
3073
3074                 return TRUE;
3075         }
3076
3077         view->jump_to_find_result = FALSE;
3078
3079         /* Shift+Wheel scrolls the in the perpendicular direction */
3080         if (state & GDK_SHIFT_MASK) {
3081                 if (event->direction == GDK_SCROLL_UP)
3082                         event->direction = GDK_SCROLL_LEFT;
3083                 else if (event->direction == GDK_SCROLL_LEFT)
3084                         event->direction = GDK_SCROLL_UP;
3085                 else if (event->direction == GDK_SCROLL_DOWN)
3086                         event->direction = GDK_SCROLL_RIGHT;
3087                 else if (event->direction == GDK_SCROLL_RIGHT)
3088                         event->direction = GDK_SCROLL_DOWN;
3089
3090                 event->state &= ~GDK_SHIFT_MASK;
3091                 state &= ~GDK_SHIFT_MASK;
3092         }
3093
3094         if (state == 0 && view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous) {
3095                 switch (event->direction) {
3096                         case GDK_SCROLL_DOWN:
3097                         case GDK_SCROLL_RIGHT:
3098                                 ev_view_next_page (view);
3099                                 break;
3100                         case GDK_SCROLL_UP:
3101                         case GDK_SCROLL_LEFT:
3102                                 ev_view_previous_page (view);
3103                                 break;
3104                 }
3105
3106                 return TRUE;
3107         }
3108
3109         return FALSE;
3110 }
3111
3112 static EvViewSelection *
3113 find_selection_for_page (EvView *view,
3114                          gint    page)
3115 {
3116         GList *list;
3117
3118         for (list = view->selection_info.selections; list != NULL; list = list->next) {
3119                 EvViewSelection *selection;
3120
3121                 selection = (EvViewSelection *) list->data;
3122
3123                 if (selection->page == page)
3124                         return selection;
3125         }
3126
3127         return NULL;
3128 }
3129
3130 static gboolean
3131 ev_view_expose_event (GtkWidget      *widget,
3132                       GdkEventExpose *event)
3133 {
3134         EvView    *view = EV_VIEW (widget);
3135         GdkWindow *bin_window;
3136         cairo_t   *cr;
3137         gint       i;
3138
3139         if (view->loading) {
3140                 show_loading_window (view);
3141         } else if (view->loading_window &&
3142                    gtk_widget_get_visible (view->loading_window)) {
3143                 ev_view_loading_window_move (view);
3144         }
3145
3146         if (view->document == NULL)
3147                 return FALSE;
3148
3149         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3150         cr = gdk_cairo_create (bin_window);
3151
3152         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3153                 GdkRectangle page_area;
3154                 GtkBorder border;
3155                 gboolean page_ready = TRUE;
3156
3157                 if (!ev_view_get_page_extents (view, i, &page_area, &border))
3158                         continue;
3159
3160                 page_area.x -= view->scroll_x;
3161                 page_area.y -= view->scroll_y;
3162
3163                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
3164
3165                 if (page_ready && view->find_pages && view->highlight_find_results)
3166                         highlight_find_results (view, i);
3167                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3168                         show_annotation_windows (view, i);
3169                 if (page_ready && view->synctex_result)
3170                         highlight_forward_search_results (view, i);
3171         }
3172
3173         cairo_destroy (cr);
3174
3175         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3176                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3177
3178         return FALSE;
3179 }
3180
3181 static gboolean
3182 ev_view_do_popup_menu (EvView *view,
3183                        gdouble x,
3184                        gdouble y)
3185 {
3186         GList        *items = NULL;
3187         EvLink       *link;
3188         EvImage      *image;
3189         EvAnnotation *annot;
3190
3191         image = ev_view_get_image_at_location (view, x, y);
3192         if (image)
3193                 items = g_list_prepend (items, image);
3194
3195         link = ev_view_get_link_at_location (view, x, y);
3196         if (link)
3197                 items = g_list_prepend (items, link);
3198
3199         annot = ev_view_get_annotation_at_location (view, x, y);
3200         if (annot)
3201                 items = g_list_prepend (items, annot);
3202
3203         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, items);
3204
3205         g_list_free (items);
3206
3207         return TRUE;
3208 }
3209
3210 static gboolean
3211 ev_view_popup_menu (GtkWidget *widget)
3212 {
3213         gint x, y;
3214
3215         gtk_widget_get_pointer (widget, &x, &y);
3216         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3217 }
3218
3219 static void
3220 get_link_area (EvView       *view,
3221                gint          x,
3222                gint          y,
3223                EvLink       *link,
3224                GdkRectangle *area)
3225 {
3226         GList *link_mapping;
3227         gint   page;
3228         gint   x_offset = 0, y_offset = 0;
3229
3230         x += view->scroll_x;
3231         y += view->scroll_y;
3232
3233         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3234
3235         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
3236         ev_view_get_area_from_mapping (view, page,
3237                                        link_mapping,
3238                                        link, area);
3239 }
3240
3241 static void
3242 get_annot_area (EvView       *view,
3243                gint          x,
3244                gint          y,
3245                EvAnnotation *annot,
3246                GdkRectangle *area)
3247 {
3248         GList *annot_mapping;
3249         gint   page;
3250         gint   x_offset = 0, y_offset = 0;
3251
3252         x += view->scroll_x;
3253         y += view->scroll_y;
3254
3255         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3256
3257         annot_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
3258         ev_view_get_area_from_mapping (view, page,
3259                                        annot_mapping,
3260                                        annot, area);
3261 }
3262
3263 static gboolean
3264 ev_view_query_tooltip (GtkWidget  *widget,
3265                        gint        x,
3266                        gint        y,
3267                        gboolean    keyboard_tip,
3268                        GtkTooltip *tooltip)
3269 {
3270         EvView       *view = EV_VIEW (widget);
3271         EvLink       *link;
3272         EvAnnotation *annot;
3273         gchar        *text;
3274
3275         annot = ev_view_get_annotation_at_location (view, x, y);
3276         if (annot && annot->contents) {
3277                 GdkRectangle annot_area;
3278
3279                 get_annot_area (view, x, y, annot, &annot_area);
3280                 gtk_tooltip_set_text (tooltip, annot->contents);
3281                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
3282
3283                 return TRUE;
3284         }
3285
3286         link = ev_view_get_link_at_location (view, x, y);
3287         if (!link)
3288                 return FALSE;
3289
3290         text = tip_from_link (view, link);
3291         if (text && g_utf8_validate (text, -1, NULL)) {
3292                 GdkRectangle link_area;
3293
3294                 get_link_area (view, x, y, link, &link_area);
3295                 gtk_tooltip_set_text (tooltip, text);
3296                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3297         }
3298         g_free (text);
3299
3300         return TRUE;
3301 }
3302
3303 static void
3304 start_selection_for_event (EvView         *view,
3305                            GdkEventButton *event)
3306 {
3307         clear_selection (view);
3308
3309         view->selection_info.start.x = event->x + view->scroll_x;
3310         view->selection_info.start.y = event->y + view->scroll_y;
3311
3312         switch (event->type) {
3313                 case GDK_2BUTTON_PRESS:
3314                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3315                         break;
3316                 case GDK_3BUTTON_PRESS:
3317                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3318                         break;
3319                 default:
3320                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3321                         return;
3322         }
3323
3324         /* In case of WORD or LINE, compute selections now */
3325         compute_selections (view,
3326                             view->selection_info.style,
3327                             &(view->selection_info.start),
3328                             &(view->selection_info.start));
3329 }
3330
3331 static gboolean
3332 ev_view_button_press_event (GtkWidget      *widget,
3333                             GdkEventButton *event)
3334 {
3335         EvView *view = EV_VIEW (widget);
3336
3337         if (!view->document)
3338                 return FALSE;
3339
3340         if (!gtk_widget_has_focus (widget)) {
3341                 gtk_widget_grab_focus (widget);
3342         }
3343
3344         if (view->window_child_focus) {
3345                 EvAnnotationWindow *window;
3346                 EvAnnotation       *annot;
3347
3348                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3349                 annot = ev_annotation_window_get_annotation (window);
3350                 ev_annotation_window_ungrab_focus (window);
3351                 ev_view_annotation_save (view, annot);
3352                 view->window_child_focus = NULL;
3353         }
3354
3355         view->pressed_button = event->button;
3356         view->selection_info.in_drag = FALSE;
3357
3358         if (view->scroll_info.autoscrolling)
3359                 return TRUE;
3360
3361         switch (event->button) {
3362                 case 1: {
3363                         EvImage *image;
3364                         EvAnnotation *annot;
3365                         EvFormField *field;
3366
3367                         if (event->state & GDK_CONTROL_MASK)
3368                                 return ev_view_synctex_backward_search (view, event->x , event->y);
3369
3370                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3371                                 if (event->type == GDK_3BUTTON_PRESS) {
3372                                         start_selection_for_event (view, event);
3373                                 } else if (location_in_selected_text (view,
3374                                                                event->x + view->scroll_x,
3375                                                                event->y + view->scroll_y)) {
3376                                         view->selection_info.in_drag = TRUE;
3377                                 } else {
3378                                         start_selection_for_event (view, event);
3379                                 }
3380
3381                                 gtk_widget_queue_draw (widget);
3382                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3383                                 ev_view_handle_annotation (view, annot, event->x, event->y, event->time);
3384                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3385                                 ev_view_remove_all (view);
3386                                 ev_view_handle_form_field (view, field, event->x, event->y);
3387                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3388                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3389                                 if (view->image_dnd_info.image)
3390                                         g_object_unref (view->image_dnd_info.image);
3391                                 view->image_dnd_info.image = g_object_ref (image);
3392                                 view->image_dnd_info.in_drag = TRUE;
3393
3394                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3395                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3396                         } else {
3397                                 ev_view_remove_all (view);
3398
3399                                 if (view->synctex_result) {
3400                                         g_free (view->synctex_result);
3401                                         view->synctex_result = NULL;
3402                                         gtk_widget_queue_draw (widget);
3403                                 }
3404
3405                                 if (EV_IS_SELECTION (view->document))
3406                                         start_selection_for_event (view, event);
3407                         }
3408                 }
3409                         return TRUE;
3410                 case 2:
3411                         /* use root coordinates as reference point because
3412                          * scrolling changes window relative coordinates */
3413                         view->drag_info.start.x = event->x_root;
3414                         view->drag_info.start.y = event->y_root;
3415                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3416                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3417
3418                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3419
3420                         return TRUE;
3421                 case 3:
3422                         view->scroll_info.start_y = event->y;
3423                         return ev_view_do_popup_menu (view, event->x, event->y);
3424         }
3425
3426         return FALSE;
3427 }
3428
3429 static void
3430 ev_view_remove_all (EvView *view)
3431 {
3432         GList *children, *child;
3433
3434         children = gtk_container_get_children (GTK_CONTAINER (view));
3435         for (child = children; child && child->data; child = g_list_next (child)) {
3436                 gtk_container_remove (GTK_CONTAINER (view),
3437                                       GTK_WIDGET (child->data));
3438         }
3439         g_list_free (children);
3440 }
3441
3442 /*** Drag and Drop ***/
3443 static void
3444 ev_view_drag_data_get (GtkWidget        *widget,
3445                        GdkDragContext   *context,
3446                        GtkSelectionData *selection_data,
3447                        guint             info,
3448                        guint             time)
3449 {
3450         EvView *view = EV_VIEW (widget);
3451
3452         switch (info) {
3453                 case TARGET_DND_TEXT:
3454                         if (EV_IS_SELECTION (view->document) &&
3455                             view->selection_info.selections) {
3456                                 gchar *text;
3457
3458                                 text = get_selected_text (view);
3459                                 gtk_selection_data_set_text (selection_data,
3460                                                              text,
3461                                                              strlen (text));
3462                                 g_free (text);
3463                         }
3464                         break;
3465                 case TARGET_DND_IMAGE:
3466                         if (view->image_dnd_info.image) {
3467                                 GdkPixbuf *pixbuf;
3468
3469                                 ev_document_doc_mutex_lock ();
3470                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3471                                                                        view->image_dnd_info.image);
3472                                 ev_document_doc_mutex_unlock ();
3473
3474                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3475                                 g_object_unref (pixbuf);
3476                         }
3477                         break;
3478                 case TARGET_DND_URI:
3479                         if (view->image_dnd_info.image) {
3480                                 GdkPixbuf   *pixbuf;
3481                                 const gchar *tmp_uri;
3482                                 gchar       *uris[2];
3483
3484                                 ev_document_doc_mutex_lock ();
3485                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3486                                                                        view->image_dnd_info.image);
3487                                 ev_document_doc_mutex_unlock ();
3488
3489                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3490                                 g_object_unref (pixbuf);
3491
3492                                 uris[0] = (gchar *)tmp_uri;
3493                                 uris[1] = NULL;
3494                                 gtk_selection_data_set_uris (selection_data, uris);
3495                         }
3496         }
3497 }
3498
3499 static gboolean
3500 ev_view_drag_motion (GtkWidget      *widget,
3501                      GdkDragContext *context,
3502                      gint            x,
3503                      gint            y,
3504                      guint           time)
3505 {
3506         if (gtk_drag_get_source_widget (context) == widget)
3507                 gdk_drag_status (context, 0, time);
3508         else
3509                 gdk_drag_status (context, gdk_drag_context_get_suggested_action (context), time);
3510
3511         return TRUE;
3512 }
3513
3514 static gboolean
3515 selection_update_idle_cb (EvView *view)
3516 {
3517         compute_selections (view,
3518                             view->selection_info.style,
3519                             &view->selection_info.start,
3520                             &view->motion);
3521         view->selection_update_id = 0;
3522         return FALSE;
3523 }
3524
3525 static gboolean
3526 selection_scroll_timeout_cb (EvView *view)
3527 {
3528         gint x, y, shift = 0;
3529         GtkWidget *widget = GTK_WIDGET (view);
3530         GtkAllocation allocation;
3531
3532         gtk_widget_get_allocation (widget, &allocation);
3533         gtk_widget_get_pointer (widget, &x, &y);
3534
3535         if (y > allocation.height) {
3536                 shift = (y - allocation.height) / 2;
3537         } else if (y < 0) {
3538                 shift = y / 2;
3539         }
3540
3541         if (shift)
3542                 gtk_adjustment_set_value (view->vadjustment,
3543                                           CLAMP (gtk_adjustment_get_value (view->vadjustment) + shift,
3544                                                  gtk_adjustment_get_lower (view->vadjustment),
3545                                                  gtk_adjustment_get_upper (view->vadjustment) -
3546                                                  gtk_adjustment_get_page_size (view->vadjustment)));
3547
3548         if (x > allocation.width) {
3549                 shift = (x - allocation.width) / 2;
3550         } else if (x < 0) {
3551                 shift = x / 2;
3552         }
3553
3554         if (shift)
3555                 gtk_adjustment_set_value (view->hadjustment,
3556                                           CLAMP (gtk_adjustment_get_value (view->hadjustment) + shift,
3557                                                  gtk_adjustment_get_lower (view->hadjustment),
3558                                                  gtk_adjustment_get_upper (view->hadjustment) -
3559                                                  gtk_adjustment_get_page_size (view->hadjustment)));
3560
3561         return TRUE;
3562 }
3563
3564 static gboolean
3565 ev_view_drag_update_momentum (EvView *view)
3566 {
3567         int i;
3568         if (!view->drag_info.in_drag)
3569                 return FALSE;
3570
3571         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3572                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3573                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3574         }
3575
3576         /* Momentum is a moving average of 10ms granularity over
3577          * the last 100ms with each 10ms stored in buffer.
3578          */
3579
3580         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3581         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3582
3583         return TRUE;
3584 }
3585
3586 static gboolean
3587 ev_view_scroll_drag_release (EvView *view)
3588 {
3589         gdouble dhadj_value, dvadj_value;
3590         gdouble oldhadjustment, oldvadjustment;
3591         gdouble h_page_size, v_page_size;
3592         gdouble h_upper, v_upper;
3593         GtkAllocation allocation;
3594
3595         view->drag_info.momentum.x /= 1.2;
3596         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3597
3598         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
3599
3600         h_page_size = gtk_adjustment_get_page_size (view->hadjustment);
3601         v_page_size = gtk_adjustment_get_page_size (view->vadjustment);
3602
3603         dhadj_value = h_page_size *
3604                       (gdouble)view->drag_info.momentum.x / allocation.width;
3605         dvadj_value = v_page_size *
3606                       (gdouble)view->drag_info.momentum.y / allocation.height;
3607
3608         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3609         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3610
3611         h_upper = gtk_adjustment_get_upper (view->hadjustment);
3612         v_upper = gtk_adjustment_get_upper (view->vadjustment);
3613
3614         /* When we reach the edges, we need either to absorb some momentum and bounce by
3615          * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3616         if (((oldhadjustment + dhadj_value) > (h_upper - h_page_size)) ||
3617             ((oldhadjustment + dhadj_value) < 0))
3618                 view->drag_info.momentum.x = 0;
3619         if (((oldvadjustment + dvadj_value) > (v_upper - v_page_size)) ||
3620             ((oldvadjustment + dvadj_value) < 0))
3621                 view->drag_info.momentum.y = 0;
3622
3623         gtk_adjustment_set_value (view->hadjustment,
3624                                   MIN (oldhadjustment + dhadj_value,
3625                                        h_upper - h_page_size));
3626         gtk_adjustment_set_value (view->vadjustment,
3627                                   MIN (oldvadjustment + dvadj_value,
3628                                        v_upper - v_page_size));
3629
3630         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3631             ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3632                 return FALSE;
3633         else
3634                 return TRUE;
3635 }
3636
3637 static gboolean
3638 ev_view_motion_notify_event (GtkWidget      *widget,
3639                              GdkEventMotion *event)
3640 {
3641         EvView    *view = EV_VIEW (widget);
3642         GdkWindow *bin_window;
3643         gint       x, y;
3644
3645         if (!view->document)
3646                 return FALSE;
3647
3648         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3649
3650         if (event->is_hint || event->window != bin_window) {
3651             gtk_widget_get_pointer (widget, &x, &y);
3652         } else {
3653             x = event->x;
3654             y = event->y;
3655         }
3656
3657         if (view->scroll_info.autoscrolling) {
3658                 view->scroll_info.last_y = y;
3659                 return TRUE;
3660         }
3661
3662         if (view->selection_info.in_drag) {
3663                 if (gtk_drag_check_threshold (widget,
3664                                               view->selection_info.start.x,
3665                                               view->selection_info.start.y,
3666                                               x, y)) {
3667                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3668
3669                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3670
3671                         gtk_drag_begin (widget, target_list,
3672                                         GDK_ACTION_COPY,
3673                                         1, (GdkEvent *)event);
3674
3675                         view->selection_info.in_drag = FALSE;
3676
3677                         gtk_target_list_unref (target_list);
3678
3679                         return TRUE;
3680                 }
3681         } else if (view->image_dnd_info.in_drag) {
3682                 if (gtk_drag_check_threshold (widget,
3683                                               view->selection_info.start.x,
3684                                               view->selection_info.start.y,
3685                                               x, y)) {
3686                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3687
3688                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3689                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3690
3691                         gtk_drag_begin (widget, target_list,
3692                                         GDK_ACTION_COPY,
3693                                         1, (GdkEvent *)event);
3694
3695                         view->image_dnd_info.in_drag = FALSE;
3696
3697                         gtk_target_list_unref (target_list);
3698
3699                         return TRUE;
3700                 }
3701         }
3702
3703         switch (view->pressed_button) {
3704         case 1:
3705                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3706                  * documents only.
3707                  */
3708                 if (view->rotation != 0)
3709                         return FALSE;
3710
3711                 /* Schedule timeout to scroll during selection and additionally
3712                  * scroll once to allow arbitrary speed. */
3713                 if (!view->selection_scroll_id)
3714                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3715                                                                (GSourceFunc)selection_scroll_timeout_cb,
3716                                                                view);
3717                 else
3718                     selection_scroll_timeout_cb (view);
3719
3720                 view->selection_info.in_selection = TRUE;
3721                 view->motion.x = x + view->scroll_x;
3722                 view->motion.y = y + view->scroll_y;
3723
3724                 /* Queue an idle to handle the motion.  We do this because
3725                  * handling any selection events in the motion could be slower
3726                  * than new motion events reach us.  We always put it in the
3727                  * idle to make sure we catch up and don't visibly lag the
3728                  * mouse. */
3729                 if (!view->selection_update_id)
3730                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3731
3732                 return TRUE;
3733         case 2:
3734                 if (!view->drag_info.in_drag) {
3735                         gboolean start;
3736                         int i;
3737
3738                         start = gtk_drag_check_threshold (widget,
3739                                                           view->drag_info.start.x,
3740                                                           view->drag_info.start.y,
3741                                                           event->x_root,
3742                                                           event->y_root);
3743                         view->drag_info.in_drag = start;
3744                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3745                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3746                         /* Set 100 to choose how long it takes to build up momentum */
3747                         /* Clear out previous momentum info: */
3748                         for (i = 0; i < DRAG_HISTORY; i++) {
3749                                 view->drag_info.buffer[i].x = event->x;
3750                                 view->drag_info.buffer[i].y = event->y;
3751                         }
3752                         view->drag_info.momentum.x = 0;
3753                         view->drag_info.momentum.y = 0;
3754                 }
3755
3756                 if (view->drag_info.in_drag) {
3757                         int dx, dy;
3758                         gdouble dhadj_value, dvadj_value;
3759                         GtkAllocation allocation;
3760
3761                         view->drag_info.buffer[0].x = event->x;
3762                         view->drag_info.buffer[0].y = event->y;
3763
3764                         dx = event->x_root - view->drag_info.start.x;
3765                         dy = event->y_root - view->drag_info.start.y;
3766
3767                         gtk_widget_get_allocation (widget, &allocation);
3768
3769                         dhadj_value = gtk_adjustment_get_page_size (view->hadjustment) *
3770                                       (gdouble)dx / allocation.width;
3771                         dvadj_value = gtk_adjustment_get_page_size (view->vadjustment) *
3772                                       (gdouble)dy / allocation.height;
3773
3774                         /* clamp scrolling to visible area */
3775                         gtk_adjustment_set_value (view->hadjustment,
3776                                                   MIN (view->drag_info.hadj - dhadj_value,
3777                                                        gtk_adjustment_get_upper (view->hadjustment) -
3778                                                        gtk_adjustment_get_page_size (view->hadjustment)));
3779                         gtk_adjustment_set_value (view->vadjustment,
3780                                                   MIN (view->drag_info.vadj - dvadj_value,
3781                                                        gtk_adjustment_get_upper (view->vadjustment) -
3782                                                        gtk_adjustment_get_page_size (view->vadjustment)));
3783
3784                         return TRUE;
3785                 }
3786
3787                 break;
3788         default:
3789                 ev_view_handle_cursor_over_xy (view, x, y);
3790         }
3791
3792         return FALSE;
3793 }
3794
3795 static gboolean
3796 ev_view_button_release_event (GtkWidget      *widget,
3797                               GdkEventButton *event)
3798 {
3799         EvView *view = EV_VIEW (widget);
3800         EvLink *link = NULL;
3801
3802         view->image_dnd_info.in_drag = FALSE;
3803
3804         if (view->scroll_info.autoscrolling) {
3805                 ev_view_autoscroll_stop (view);
3806                 view->pressed_button = -1;
3807
3808                 return TRUE;
3809         }
3810
3811         if (view->drag_info.in_drag) {
3812                 view->drag_info.release_timeout_id =
3813                         g_timeout_add (20,
3814                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3815         }
3816
3817         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3818                 link = ev_view_get_link_at_location (view, event->x, event->y);
3819         }
3820
3821         view->drag_info.in_drag = FALSE;
3822
3823         if (view->pressed_button == 2) {
3824                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3825         }
3826
3827         view->pressed_button = -1;
3828
3829         if (view->selection_scroll_id) {
3830             g_source_remove (view->selection_scroll_id);
3831             view->selection_scroll_id = 0;
3832         }
3833         if (view->selection_update_id) {
3834             g_source_remove (view->selection_update_id);
3835             view->selection_update_id = 0;
3836         }
3837
3838         if (view->selection_info.selections) {
3839                 clear_link_selected (view);
3840                 ev_view_update_primary_selection (view);
3841
3842                 if (view->selection_info.in_drag) {
3843                         clear_selection (view);
3844                         gtk_widget_queue_draw (widget);
3845                 }
3846
3847                 view->selection_info.in_drag = FALSE;
3848         } else if (link) {
3849                 if (event->button == 2) {
3850                         EvLinkAction    *action;
3851                         EvLinkActionType type;
3852
3853                         action = ev_link_get_action (link);
3854                         if (!action)
3855                                 return FALSE;
3856
3857                         type = ev_link_action_get_action_type (action);
3858                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3859                                 g_signal_emit (view,
3860                                                signals[SIGNAL_EXTERNAL_LINK],
3861                                                0, action);
3862                         }
3863                 } else {
3864                         ev_view_handle_link (view, link);
3865                 }
3866         }
3867
3868         return FALSE;
3869 }
3870
3871 static gboolean
3872 ev_view_key_press_event (GtkWidget   *widget,
3873                          GdkEventKey *event)
3874 {
3875         EvView *view = EV_VIEW (widget);
3876
3877         if (!view->document)
3878                 return FALSE;
3879
3880         if (!gtk_widget_has_focus (widget)) {
3881                 /* Forward key events to current focused window child */
3882                 if (view->window_child_focus) {
3883                         GdkEventKey *new_event;
3884                         gboolean     handled;
3885
3886                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
3887                         g_object_unref (new_event->window);
3888                         new_event->window = gtk_widget_get_window (view->window_child_focus->window);
3889                         if (new_event->window)
3890                                 g_object_ref (new_event->window);
3891                         gtk_widget_realize (view->window_child_focus->window);
3892                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
3893                         gdk_event_free ((GdkEvent *)new_event);
3894
3895                         return handled;
3896                 }
3897
3898                 return FALSE;
3899         }
3900
3901         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3902 }
3903
3904 static gint
3905 ev_view_focus_in (GtkWidget     *widget,
3906                   GdkEventFocus *event)
3907 {
3908         if (EV_VIEW (widget)->pixbuf_cache)
3909                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3910         gtk_widget_queue_draw (widget);
3911
3912         return FALSE;
3913 }
3914
3915 static gint
3916 ev_view_focus_out (GtkWidget     *widget,
3917                    GdkEventFocus *event)
3918 {
3919         if (EV_VIEW (widget)->pixbuf_cache)
3920                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3921         gtk_widget_queue_draw (widget);
3922
3923         return FALSE;
3924 }
3925
3926 static gboolean
3927 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3928 {
3929         EvView *view = EV_VIEW (widget);
3930
3931         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
3932                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3933
3934         return FALSE;
3935 }
3936
3937 static gboolean
3938 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3939 {
3940         EvView *view = EV_VIEW (widget);
3941
3942         ev_view_handle_cursor_over_xy (view, event->x, event->y);
3943
3944         return FALSE;
3945 }
3946
3947 static void
3948 ev_view_style_set (GtkWidget *widget,
3949                    GtkStyle  *old_style)
3950 {
3951         if (EV_VIEW (widget)->pixbuf_cache)
3952                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3953
3954         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
3955 }
3956
3957 /*** Drawing ***/
3958
3959 static void
3960 draw_rubberband (EvView             *view,
3961                  GdkWindow          *window,
3962                  const GdkRectangle *rect,
3963                  gdouble             alpha)
3964 {
3965         GtkStyle *style;
3966         GdkColor *fill_color_gdk;
3967         gdouble   r, g, b;
3968         cairo_t  *cr;
3969
3970         style = gtk_widget_get_style (GTK_WIDGET (view));
3971         fill_color_gdk = gdk_color_copy (&style->base[GTK_STATE_SELECTED]);
3972         r = fill_color_gdk->red / 65535.;
3973         g = fill_color_gdk->green / 65535.;
3974         b = fill_color_gdk->blue / 65535.;
3975
3976         cr = gdk_cairo_create (window);
3977
3978         cairo_set_source_rgba (cr, r, g, b, alpha);
3979         cairo_rectangle (cr,
3980                          rect->x - view->scroll_x,
3981                          rect->y - view->scroll_y,
3982                          rect->width, rect->height);
3983         cairo_fill_preserve (cr);
3984
3985         cairo_set_line_width (cr, 0.5);
3986         cairo_set_source_rgb (cr, r, g, b);
3987         cairo_stroke (cr);
3988
3989         cairo_destroy (cr);
3990
3991         gdk_color_free (fill_color_gdk);
3992 }
3993
3994
3995 static void
3996 highlight_find_results (EvView *view, int page)
3997 {
3998         gint       i, n_results = 0;
3999         GdkWindow *bin_window;
4000
4001         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4002
4003         n_results = ev_view_find_get_n_results (view, page);
4004
4005         for (i = 0; i < n_results; i++) {
4006                 EvRectangle *rectangle;
4007                 GdkRectangle view_rectangle;
4008                 gdouble      alpha;
4009
4010                 if (i == view->find_result && page == view->current_page) {
4011                         alpha = 0.6;
4012                 } else {
4013                         alpha = 0.3;
4014                 }
4015
4016                 rectangle = ev_view_find_get_result (view, page, i);
4017                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4018                 draw_rubberband (view, bin_window, &view_rectangle, alpha);
4019         }
4020 }
4021
4022 static void
4023 highlight_forward_search_results (EvView *view, int page)
4024 {
4025         GdkWindow   *bin_window;
4026         GdkRectangle rect;
4027         cairo_t     *cr;
4028         EvMapping   *mapping = view->synctex_result;
4029
4030         if (GPOINTER_TO_INT (mapping->data) != page)
4031                 return;
4032
4033         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4034         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4035
4036         cr = gdk_cairo_create (bin_window);
4037         cairo_set_source_rgb (cr, 1., 0., 0.);
4038         cairo_rectangle (cr,
4039                          rect.x - view->scroll_x,
4040                          rect.y - view->scroll_y,
4041                          rect.width, rect.height);
4042         cairo_stroke (cr);
4043         cairo_destroy (cr);
4044 }
4045
4046 static void
4047 ev_view_loading_window_move (EvView *view)
4048 {
4049         GtkWidget       *widget = GTK_WIDGET (view);
4050         EvLoadingWindow *window = EV_LOADING_WINDOW (view->loading_window);
4051         gint             root_x, root_y;
4052         gint             window_width;
4053         GtkAllocation    allocation;
4054
4055         gtk_widget_get_allocation (widget, &allocation);
4056         gdk_window_get_origin (gtk_widget_get_window (widget), &root_x, &root_y);
4057         ev_loading_window_get_size (window, &window_width, NULL);
4058
4059         root_x += allocation.width - window_width - 10;
4060         root_y += 10;
4061
4062         ev_loading_window_move (window, root_x, root_y);
4063 }
4064
4065 static gboolean
4066 show_loading_window_cb (EvView *view)
4067 {
4068         if (!view->loading_window) {
4069                 GtkWindow *parent;
4070                 GdkScreen *screen;
4071
4072                 parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
4073                 view->loading_window = ev_loading_window_new (parent);
4074
4075                 /* Show the window off screen to get a valid size asap */
4076                 screen = gtk_widget_get_screen (GTK_WIDGET (view));
4077                 gtk_window_move (GTK_WINDOW (view->loading_window),
4078                                  gdk_screen_get_width (screen) + 1,
4079                                  gdk_screen_get_height (screen) + 1);
4080                 gtk_widget_show (view->loading_window);
4081         }
4082
4083         ev_view_loading_window_move (view);
4084
4085         gtk_widget_show (view->loading_window);
4086
4087         view->loading_timeout = 0;
4088
4089         return FALSE;
4090 }
4091
4092 static void
4093 show_loading_window (EvView *view)
4094 {
4095         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4096                 ev_view_loading_window_move (view);
4097                 return;
4098         }
4099
4100         if (!view->loading_timeout) {
4101                 view->loading_timeout =
4102                         g_timeout_add_full (G_PRIORITY_LOW,
4103                                             0.5, (GSourceFunc)show_loading_window_cb,
4104                                             view, NULL);
4105         }
4106 }
4107
4108 static void
4109 hide_loading_window (EvView *view)
4110 {
4111         if (view->loading_timeout) {
4112                 g_source_remove (view->loading_timeout);
4113                 view->loading_timeout = 0;
4114         }
4115
4116         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4117                 gtk_widget_hide (view->loading_window);
4118         }
4119 }
4120
4121 static void
4122 draw_one_page (EvView       *view,
4123                gint          page,
4124                cairo_t      *cr,
4125                GdkRectangle *page_area,
4126                GtkBorder    *border,
4127                GdkRectangle *expose_area,
4128                gboolean     *page_ready)
4129 {
4130         GdkWindow   *bin_window;
4131         GdkRectangle overlap;
4132         GdkRectangle real_page_area;
4133         gint         current_page;
4134         gboolean     inverted_colors;
4135
4136         g_assert (view->document);
4137
4138         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4139                 return;
4140
4141         /* Render the document itself */
4142         real_page_area = *page_area;
4143
4144         real_page_area.x += border->left;
4145         real_page_area.y += border->top;
4146         real_page_area.width -= (border->left + border->right);
4147         real_page_area.height -= (border->top + border->bottom);
4148         *page_ready = TRUE;
4149
4150         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4151         current_page = ev_document_model_get_page (view->model);
4152         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4153         ev_document_misc_paint_one_page (bin_window,
4154                                          GTK_WIDGET (view),
4155                                          page_area, border,
4156                                          page == current_page,
4157                                          inverted_colors);
4158
4159         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4160                 gint             width, height;
4161                 gint             page_width, page_height;
4162                 cairo_surface_t *page_surface = NULL;
4163                 gint             selection_width, selection_height;
4164                 cairo_surface_t *selection_surface = NULL;
4165
4166                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4167
4168                 if (!page_surface) {
4169                         if (page == current_page)
4170                                 show_loading_window (view);
4171
4172                         *page_ready = FALSE;
4173
4174                         return;
4175                 }
4176
4177                 if (page == current_page)
4178                         hide_loading_window (view);
4179
4180                 ev_view_get_page_size (view, page, &width, &height);
4181
4182                 page_width = cairo_image_surface_get_width (page_surface);
4183                 page_height = cairo_image_surface_get_height (page_surface);
4184
4185                 cairo_save (cr);
4186                 cairo_translate (cr, overlap.x, overlap.y);
4187
4188                 if (width != page_width || height != page_height) {
4189                         cairo_pattern_set_filter (cairo_get_source (cr),
4190                                                   CAIRO_FILTER_FAST);
4191                         cairo_scale (cr,
4192                                      (gdouble)width / page_width,
4193                                      (gdouble)height / page_height);
4194                 }
4195
4196                 cairo_surface_set_device_offset (page_surface,
4197                                                  overlap.x - real_page_area.x,
4198                                                  overlap.y - real_page_area.y);
4199                 cairo_set_source_surface (cr, page_surface, 0, 0);
4200                 cairo_paint (cr);
4201                 cairo_restore (cr);
4202
4203                 /* Get the selection pixbuf iff we have something to draw */
4204                 if (find_selection_for_page (view, page) &&
4205                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4206                         selection_surface =
4207                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4208                                                                        page,
4209                                                                        view->scale,
4210                                                                        NULL);
4211                 }
4212
4213                 if (!selection_surface) {
4214                         return;
4215                 }
4216
4217                 selection_width = cairo_image_surface_get_width (selection_surface);
4218                 selection_height = cairo_image_surface_get_height (selection_surface);
4219
4220                 cairo_save (cr);
4221                 cairo_translate (cr, overlap.x, overlap.y);
4222
4223                 if (width != selection_width || height != selection_height) {
4224                         cairo_pattern_set_filter (cairo_get_source (cr),
4225                                                   CAIRO_FILTER_FAST);
4226                         cairo_scale (cr,
4227                                      (gdouble)width / selection_width,
4228                                      (gdouble)height / selection_height);
4229                 }
4230
4231                 cairo_surface_set_device_offset (selection_surface,
4232                                                  overlap.x - real_page_area.x,
4233                                                  overlap.y - real_page_area.y);
4234                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4235                 cairo_paint (cr);
4236                 cairo_restore (cr);
4237         }
4238 }
4239
4240 /*** GObject functions ***/
4241
4242 static void
4243 ev_view_finalize (GObject *object)
4244 {
4245         EvView *view = EV_VIEW (object);
4246
4247         clear_selection (view);
4248         clear_link_selected (view);
4249
4250         if (view->synctex_result) {
4251                 g_free (view->synctex_result);
4252                 view->synctex_result = NULL;
4253         }
4254
4255         if (view->image_dnd_info.image)
4256                 g_object_unref (view->image_dnd_info.image);
4257         view->image_dnd_info.image = NULL;
4258
4259         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4260 }
4261
4262 static void
4263 ev_view_destroy (GtkObject *object)
4264 {
4265         EvView *view = EV_VIEW (object);
4266
4267         if (view->model) {
4268                 g_object_unref (view->model);
4269                 view->model = NULL;
4270         }
4271
4272         if (view->pixbuf_cache) {
4273                 g_object_unref (view->pixbuf_cache);
4274                 view->pixbuf_cache = NULL;
4275         }
4276
4277         if (view->document) {
4278                 g_object_unref (view->document);
4279                 view->document = NULL;
4280         }
4281
4282         if (view->page_cache) {
4283                 g_object_unref (view->page_cache);
4284                 view->page_cache = NULL;
4285         }
4286
4287         ev_view_window_children_free (view);
4288
4289         if (view->selection_scroll_id) {
4290             g_source_remove (view->selection_scroll_id);
4291             view->selection_scroll_id = 0;
4292         }
4293
4294         if (view->selection_update_id) {
4295             g_source_remove (view->selection_update_id);
4296             view->selection_update_id = 0;
4297         }
4298
4299         if (view->scroll_info.timeout_id) {
4300             g_source_remove (view->scroll_info.timeout_id);
4301             view->scroll_info.timeout_id = 0;
4302         }
4303
4304         if (view->drag_info.drag_timeout_id) {
4305                 g_source_remove (view->drag_info.drag_timeout_id);
4306                 view->drag_info.drag_timeout_id = 0;
4307         }
4308
4309         if (view->drag_info.release_timeout_id) {
4310                 g_source_remove (view->drag_info.release_timeout_id);
4311                 view->drag_info.release_timeout_id = 0;
4312         }
4313
4314         if (view->loading_timeout) {
4315                 g_source_remove (view->loading_timeout);
4316                 view->loading_timeout = 0;
4317         }
4318
4319         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4320
4321         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4322 }
4323
4324 static AtkObject *
4325 ev_view_get_accessible (GtkWidget *widget)
4326 {
4327         static gboolean first_time = TRUE;
4328
4329         if (first_time) {
4330                 AtkObjectFactory *factory;
4331                 AtkRegistry *registry;
4332                 GType derived_type;
4333                 GType derived_atk_type;
4334
4335                 /*
4336                  * Figure out whether accessibility is enabled by looking at the
4337                  * type of the accessible object which would be created for
4338                  * the parent type of EvView.
4339                  */
4340                 derived_type = g_type_parent (EV_TYPE_VIEW);
4341
4342                 registry = atk_get_default_registry ();
4343                 factory = atk_registry_get_factory (registry,
4344                                                     derived_type);
4345                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4346                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4347                         atk_registry_set_factory_type (registry,
4348                                                        EV_TYPE_VIEW,
4349                                                        ev_view_accessible_factory_get_type ());
4350                 first_time = FALSE;
4351         }
4352         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4353 }
4354
4355 static void
4356 ev_view_class_init (EvViewClass *class)
4357 {
4358         GObjectClass *object_class = G_OBJECT_CLASS (class);
4359         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4360         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4361         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4362         GtkBindingSet *binding_set;
4363
4364         object_class->finalize = ev_view_finalize;
4365
4366         widget_class->expose_event = ev_view_expose_event;
4367         widget_class->button_press_event = ev_view_button_press_event;
4368         widget_class->motion_notify_event = ev_view_motion_notify_event;
4369         widget_class->button_release_event = ev_view_button_release_event;
4370         widget_class->key_press_event = ev_view_key_press_event;
4371         widget_class->focus_in_event = ev_view_focus_in;
4372         widget_class->focus_out_event = ev_view_focus_out;
4373         widget_class->get_accessible = ev_view_get_accessible;
4374         widget_class->size_request = ev_view_size_request;
4375         widget_class->size_allocate = ev_view_size_allocate;
4376         widget_class->realize = ev_view_realize;
4377         widget_class->scroll_event = ev_view_scroll_event;
4378         widget_class->enter_notify_event = ev_view_enter_notify_event;
4379         widget_class->leave_notify_event = ev_view_leave_notify_event;
4380         widget_class->style_set = ev_view_style_set;
4381         widget_class->drag_data_get = ev_view_drag_data_get;
4382         widget_class->drag_motion = ev_view_drag_motion;
4383         widget_class->popup_menu = ev_view_popup_menu;
4384         widget_class->query_tooltip = ev_view_query_tooltip;
4385
4386         gtk_object_class->destroy = ev_view_destroy;
4387
4388         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4389
4390         class->binding_activated = ev_view_scroll;
4391
4392         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4393                          G_TYPE_FROM_CLASS (object_class),
4394                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4395                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4396                          NULL, NULL,
4397                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4398                          G_TYPE_NONE, 2,
4399                          GTK_TYPE_SCROLL_TYPE,
4400                          G_TYPE_BOOLEAN);
4401         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4402                          G_TYPE_FROM_CLASS (object_class),
4403                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4404                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4405                          NULL, NULL,
4406                          g_cclosure_marshal_VOID__OBJECT,
4407                          G_TYPE_NONE, 1,
4408                          G_TYPE_OBJECT);
4409         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4410                          G_TYPE_FROM_CLASS (object_class),
4411                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4412                          G_STRUCT_OFFSET (EvViewClass, external_link),
4413                          NULL, NULL,
4414                          g_cclosure_marshal_VOID__OBJECT,
4415                          G_TYPE_NONE, 1,
4416                          G_TYPE_OBJECT);
4417         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4418                          G_TYPE_FROM_CLASS (object_class),
4419                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4420                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4421                          NULL, NULL,
4422                          g_cclosure_marshal_VOID__POINTER,
4423                          G_TYPE_NONE, 1,
4424                          G_TYPE_POINTER);
4425         signals[SIGNAL_SELECTION_CHANGED] = g_signal_new ("selection-changed",
4426                          G_TYPE_FROM_CLASS (object_class),
4427                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4428                          G_STRUCT_OFFSET (EvViewClass, selection_changed),
4429                          NULL, NULL,
4430                          g_cclosure_marshal_VOID__VOID,
4431                          G_TYPE_NONE, 0,
4432                          G_TYPE_NONE);
4433         signals[SIGNAL_SYNC_SOURCE] = g_signal_new ("sync-source",
4434                          G_TYPE_FROM_CLASS (object_class),
4435                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4436                          G_STRUCT_OFFSET (EvViewClass, sync_source),
4437                          NULL, NULL,
4438                          g_cclosure_marshal_VOID__POINTER,
4439                          G_TYPE_NONE, 1,
4440                          G_TYPE_POINTER);
4441
4442         binding_set = gtk_binding_set_by_class (class);
4443
4444         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4445         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4446         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4447         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4448         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4449         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4450         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4451         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4452         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4453                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4454         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4455                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4456         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4457                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4458         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4459                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4460
4461 }
4462
4463 static void
4464 ev_view_init (EvView *view)
4465 {
4466         gtk_widget_set_can_focus (GTK_WIDGET (view), TRUE);
4467
4468         view->start_page = -1;
4469         view->end_page = -1;
4470         view->spacing = 5;
4471         view->scale = 1.0;
4472         view->current_page = 0;
4473         view->pressed_button = -1;
4474         view->cursor = EV_VIEW_CURSOR_NORMAL;
4475         view->drag_info.in_drag = FALSE;
4476         view->scroll_info.autoscrolling = FALSE;
4477         view->selection_info.selections = NULL;
4478         view->selection_info.in_selection = FALSE;
4479         view->selection_info.in_drag = FALSE;
4480         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4481         view->continuous = TRUE;
4482         view->dual_page = FALSE;
4483         view->fullscreen = FALSE;
4484         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4485         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4486         view->jump_to_find_result = TRUE;
4487         view->highlight_find_results = FALSE;
4488
4489         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4490         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4491 }
4492
4493 /*** Callbacks ***/
4494
4495 static void
4496 ev_view_change_page (EvView *view,
4497                      gint    new_page)
4498 {
4499         gint x, y;
4500
4501         view->current_page = new_page;
4502         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4503
4504         hide_loading_window (view);
4505
4506         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4507         ev_view_handle_cursor_over_xy (view, x, y);
4508
4509         gtk_widget_queue_resize (GTK_WIDGET (view));
4510 }
4511
4512 static void
4513 job_finished_cb (EvPixbufCache *pixbuf_cache,
4514                  GdkRegion     *region,
4515                  EvView        *view)
4516 {
4517         if (region) {
4518                 GdkWindow *bin_window;
4519
4520                 bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4521                 gdk_window_invalidate_region (bin_window, region, TRUE);
4522         } else {
4523                 gtk_widget_queue_draw (GTK_WIDGET (view));
4524         }
4525 }
4526
4527 static void
4528 ev_view_page_changed_cb (EvDocumentModel *model,
4529                          gint             old_page,
4530                          gint             new_page,
4531                          EvView          *view)
4532 {
4533         if (!view->document)
4534                 return;
4535
4536         if (view->current_page != new_page) {
4537                 ev_view_change_page (view, new_page);
4538         } else {
4539                 gtk_widget_queue_draw (GTK_WIDGET (view));
4540         }
4541
4542         view->find_result = 0;
4543 }
4544
4545 static void
4546 on_adjustment_value_changed (GtkAdjustment *adjustment,
4547                              EvView        *view)
4548 {
4549         int dx = 0, dy = 0;
4550         gint x, y;
4551         gint value;
4552         GList *children, *l;
4553
4554         if (!gtk_widget_get_realized (GTK_WIDGET (view)))
4555                 return;
4556
4557         if (view->hadjustment) {
4558                 value = (gint) gtk_adjustment_get_value (view->hadjustment);
4559                 dx = view->scroll_x - value;
4560                 view->scroll_x = value;
4561         } else {
4562                 view->scroll_x = 0;
4563         }
4564
4565         if (view->vadjustment) {
4566                 value = (gint) gtk_adjustment_get_value (view->vadjustment);
4567                 dy = view->scroll_y - value;
4568                 view->scroll_y = value;
4569         } else {
4570                 view->scroll_y = 0;
4571         }
4572
4573         children = gtk_container_get_children (GTK_CONTAINER (view));
4574         for (l = children; l && l->data; l = g_list_next (l)) {
4575                 gint       child_x, child_y;
4576                 GtkWidget *child = (GtkWidget *)l->data;
4577
4578                 gtk_container_child_get (GTK_CONTAINER (view),
4579                                          child,
4580                                          "x", &child_x,
4581                                          "y", &child_y,
4582                                          NULL);
4583                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4584         }
4585         g_list_free (children);
4586
4587         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4588                 EvViewWindowChild *child;
4589
4590                 child = (EvViewWindowChild *)l->data;
4591
4592                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4593         }
4594
4595         if (view->pending_resize) {
4596                 gtk_widget_queue_draw (GTK_WIDGET (view));
4597         } else {
4598                 GdkWindow *bin_window;
4599
4600                 bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4601                 gdk_window_scroll (bin_window, dx, dy);
4602         }
4603
4604         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4605         ev_view_handle_cursor_over_xy (view, x, y);
4606
4607         if (view->document)
4608                 view_update_range_and_current_page (view);
4609 }
4610
4611 GtkWidget*
4612 ev_view_new (void)
4613 {
4614         GtkWidget *view;
4615
4616         view = g_object_new (EV_TYPE_VIEW, NULL);
4617
4618         return view;
4619 }
4620
4621 static void
4622 setup_caches (EvView *view)
4623 {
4624         gboolean inverted_colors;
4625
4626         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
4627         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->model, view->pixbuf_cache_size);
4628         view->page_cache = ev_page_cache_new (view->document);
4629         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4630         ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
4631         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4632 }
4633
4634 static void
4635 clear_caches (EvView *view)
4636 {
4637         if (view->pixbuf_cache) {
4638                 g_object_unref (view->pixbuf_cache);
4639                 view->pixbuf_cache = NULL;
4640         }
4641
4642         if (view->page_cache) {
4643                 g_object_unref (view->page_cache);
4644                 view->page_cache = NULL;
4645         }
4646 }
4647
4648 /**
4649  * ev_view_set_page_cache_size:
4650  * @view:
4651  * @cache_size:
4652  *
4653  * Sets the maximum size in bytes that will be used to cache
4654  * rendered pages. Use 0 to disable caching rendered pages.
4655  *
4656  * Note that this limit doesn't affect the current visible page range,
4657  * which will always be rendered. In order to limit the total memory used
4658  * you have to use ev_document_model_set_max_scale() too.
4659  *
4660  */
4661 void
4662 ev_view_set_page_cache_size (EvView *view,
4663                              gsize   cache_size)
4664 {
4665         if (view->pixbuf_cache_size == cache_size)
4666                 return;
4667
4668         view->pixbuf_cache_size = cache_size;
4669         if (view->pixbuf_cache)
4670                 ev_pixbuf_cache_set_max_size (view->pixbuf_cache, cache_size);
4671 }
4672
4673 void
4674 ev_view_set_loading (EvView       *view,
4675                      gboolean      loading)
4676 {
4677         if (view->loading && !loading)
4678                 hide_loading_window (view);
4679         view->loading = loading;
4680         gtk_widget_queue_draw (GTK_WIDGET (view));
4681 }
4682
4683 static gboolean
4684 ev_view_autoscroll_cb (EvView *view)
4685 {
4686         gdouble speed, value;
4687
4688         /* If the user stops autoscrolling, autoscrolling will be
4689          * set to false but the timeout will continue; stop the timeout: */
4690         if (!view->scroll_info.autoscrolling) {
4691                 view->scroll_info.timeout_id = 0;
4692                 return FALSE;
4693         }
4694
4695         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4696                 (view->scroll_info.last_y < view->scroll_info.start_y))
4697                 return TRUE;
4698
4699         /* Replace 100 with your speed of choice: The lower the faster.
4700          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4701          *      based on the distance of the starting point from the mouse
4702          * (All also effected by the timeout interval of this callback) */
4703
4704         if (view->scroll_info.start_y > view->scroll_info.last_y)
4705                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
4706         else
4707                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
4708
4709         value = gtk_adjustment_get_value (view->vadjustment);
4710         value = CLAMP (value + speed, 0,
4711                        gtk_adjustment_get_upper (view->vadjustment) -
4712                        gtk_adjustment_get_page_size (view->vadjustment));
4713         gtk_adjustment_set_value (view->vadjustment, value);
4714
4715         return TRUE;
4716
4717 }
4718
4719 void
4720 ev_view_autoscroll_start (EvView *view)
4721 {
4722         gint x, y;
4723
4724         g_return_if_fail (EV_IS_VIEW (view));
4725
4726         if (view->scroll_info.autoscrolling)
4727                 return;
4728
4729         view->scroll_info.autoscrolling = TRUE;
4730         view->scroll_info.timeout_id =
4731                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
4732                                view);
4733
4734         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4735         ev_view_handle_cursor_over_xy (view, x, y);
4736 }
4737
4738 void
4739 ev_view_autoscroll_stop (EvView *view)
4740 {
4741         gint x, y;
4742
4743         g_return_if_fail (EV_IS_VIEW (view));
4744
4745         if (!view->scroll_info.autoscrolling)
4746                 return;
4747
4748         view->scroll_info.autoscrolling = FALSE;
4749         if (view->scroll_info.timeout_id) {
4750                 g_source_remove (view->scroll_info.timeout_id);
4751                 view->scroll_info.timeout_id = 0;
4752         }
4753
4754         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4755         ev_view_handle_cursor_over_xy (view, x, y);
4756 }
4757
4758 static void
4759 ev_view_document_changed_cb (EvDocumentModel *model,
4760                              GParamSpec      *pspec,
4761                              EvView          *view)
4762 {
4763         EvDocument *document = ev_document_model_get_document (model);
4764
4765         if (document != view->document) {
4766                 gint current_page;
4767
4768                 clear_caches (view);
4769
4770                 if (view->document) {
4771                         g_object_unref (view->document);
4772                 }
4773
4774                 view->document = document;
4775                 view->find_result = 0;
4776
4777                 if (view->document) {
4778                         view->loading = FALSE;
4779                         g_object_ref (view->document);
4780                         setup_caches (view);
4781                 }
4782
4783                 current_page = ev_document_model_get_page (model);
4784                 if (view->current_page != current_page) {
4785                         ev_view_change_page (view, current_page);
4786                 } else {
4787                         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4788                         gtk_widget_queue_resize (GTK_WIDGET (view));
4789                 }
4790         }
4791 }
4792
4793 static void
4794 ev_view_rotation_changed_cb (EvDocumentModel *model,
4795                              GParamSpec      *pspec,
4796                              EvView          *view)
4797 {
4798         gint rotation = ev_document_model_get_rotation (model);
4799
4800         view->rotation = rotation;
4801
4802         if (view->pixbuf_cache) {
4803                 ev_pixbuf_cache_clear (view->pixbuf_cache);
4804                 if (!ev_document_is_page_size_uniform (view->document))
4805                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4806                 gtk_widget_queue_resize (GTK_WIDGET (view));
4807         }
4808
4809         ev_view_remove_all (view);
4810
4811         if (rotation != 0)
4812                 clear_selection (view);
4813 }
4814
4815 static void
4816 ev_view_inverted_colors_changed_cb (EvDocumentModel *model,
4817                                     GParamSpec      *pspec,
4818                                     EvView          *view)
4819 {
4820         if (view->pixbuf_cache) {
4821                 gboolean inverted_colors;
4822
4823                 inverted_colors = ev_document_model_get_inverted_colors (model);
4824                 ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
4825                 gtk_widget_queue_draw (GTK_WIDGET (view));
4826         }
4827 }
4828
4829 static void
4830 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
4831                                 GParamSpec      *pspec,
4832                                 EvView          *view)
4833 {
4834         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
4835
4836         view->sizing_mode = mode;
4837         if (mode != EV_SIZING_FREE)
4838                 gtk_widget_queue_resize (GTK_WIDGET (view));
4839 }
4840
4841 #define EPSILON 0.0000001
4842 static void
4843 ev_view_scale_changed_cb (EvDocumentModel *model,
4844                           GParamSpec      *pspec,
4845                           EvView          *view)
4846 {
4847         gdouble scale = ev_document_model_get_scale (model);
4848
4849         if (ABS (view->scale - scale) < EPSILON)
4850                 return;
4851
4852         view->scale = scale;
4853
4854         view->pending_resize = TRUE;
4855         if (view->sizing_mode == EV_SIZING_FREE)
4856                 gtk_widget_queue_resize (GTK_WIDGET (view));
4857 }
4858
4859 static void
4860 ev_view_continuous_changed_cb (EvDocumentModel *model,
4861                                GParamSpec      *pspec,
4862                                EvView          *view)
4863 {
4864         gboolean continuous = ev_document_model_get_continuous (model);
4865
4866         view->continuous = continuous;
4867         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4868         gtk_widget_queue_resize (GTK_WIDGET (view));
4869 }
4870
4871 static void
4872 ev_view_dual_page_changed_cb (EvDocumentModel *model,
4873                               GParamSpec      *pspec,
4874                               EvView          *view)
4875 {
4876         gboolean dual_page = ev_document_model_get_dual_page (model);
4877
4878         view->dual_page = dual_page;
4879         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4880         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
4881          * preload_cache_size to be 2 if dual_page is set.
4882          */
4883         gtk_widget_queue_resize (GTK_WIDGET (view));
4884 }
4885
4886 static void
4887 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
4888                                GParamSpec      *pspec,
4889                                EvView          *view)
4890 {
4891         gboolean fullscreen = ev_document_model_get_fullscreen (model);
4892
4893         view->fullscreen = fullscreen;
4894         gtk_widget_queue_resize (GTK_WIDGET (view));
4895 }
4896
4897 void
4898 ev_view_set_model (EvView          *view,
4899                    EvDocumentModel *model)
4900 {
4901         g_return_if_fail (EV_IS_VIEW (view));
4902         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
4903
4904         if (model == view->model)
4905                 return;
4906
4907         if (view->model) {
4908                 g_signal_handlers_disconnect_by_func (view->model,
4909                                                       ev_view_document_changed_cb,
4910                                                       view);
4911                 g_signal_handlers_disconnect_by_func (view->model,
4912                                                       ev_view_page_changed_cb,
4913                                                       view);
4914                 g_object_unref (view->model);
4915         }
4916         view->model = g_object_ref (model);
4917
4918         /* Initialize view from model */
4919         view->rotation = ev_document_model_get_rotation (view->model);
4920         view->sizing_mode = ev_document_model_get_sizing_mode (view->model);
4921         view->scale = ev_document_model_get_scale (view->model);
4922         view->continuous = ev_document_model_get_continuous (view->model);
4923         view->dual_page = ev_document_model_get_dual_page (view->model);
4924         view->fullscreen = ev_document_model_get_fullscreen (view->model);
4925         ev_view_document_changed_cb (view->model, NULL, view);
4926
4927         g_signal_connect (view->model, "notify::document",
4928                           G_CALLBACK (ev_view_document_changed_cb),
4929                           view);
4930         g_signal_connect (view->model, "notify::rotation",
4931                           G_CALLBACK (ev_view_rotation_changed_cb),
4932                           view);
4933         g_signal_connect (view->model, "notify::inverted-colors",
4934                           G_CALLBACK (ev_view_inverted_colors_changed_cb),
4935                           view);
4936         g_signal_connect (view->model, "notify::sizing-mode",
4937                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
4938                           view);
4939         g_signal_connect (view->model, "notify::scale",
4940                           G_CALLBACK (ev_view_scale_changed_cb),
4941                           view);
4942         g_signal_connect (view->model, "notify::continuous",
4943                           G_CALLBACK (ev_view_continuous_changed_cb),
4944                           view);
4945         g_signal_connect (view->model, "notify::dual-page",
4946                           G_CALLBACK (ev_view_dual_page_changed_cb),
4947                           view);
4948         g_signal_connect (view->model, "notify::fullscreen",
4949                           G_CALLBACK (ev_view_fullscreen_changed_cb),
4950                           view);
4951         g_signal_connect (view->model, "page-changed",
4952                           G_CALLBACK (ev_view_page_changed_cb),
4953                           view);
4954 }
4955
4956 static void
4957 ev_view_reload_page (EvView    *view,
4958                      gint       page,
4959                      GdkRegion *region)
4960 {
4961         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
4962                                      region,
4963                                      page,
4964                                      view->rotation,
4965                                      view->scale);
4966 }
4967
4968 void
4969 ev_view_reload (EvView *view)
4970 {
4971         ev_pixbuf_cache_clear (view->pixbuf_cache);
4972         view_update_range_and_current_page (view);
4973 }
4974
4975 /*** Zoom and sizing mode ***/
4976
4977 gboolean
4978 ev_view_can_zoom_in (EvView *view)
4979 {
4980         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
4981 }
4982
4983 gboolean
4984 ev_view_can_zoom_out (EvView *view)
4985 {
4986         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
4987 }
4988
4989 void
4990 ev_view_zoom_in (EvView *view)
4991 {
4992         gdouble scale;
4993
4994         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
4995
4996         view->pending_scroll = SCROLL_TO_CENTER;
4997         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
4998         ev_document_model_set_scale (view->model, scale);
4999 }
5000
5001 void
5002 ev_view_zoom_out (EvView *view)
5003 {
5004         gdouble scale;
5005
5006         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5007
5008         view->pending_scroll = SCROLL_TO_CENTER;
5009         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5010         ev_document_model_set_scale (view->model, scale);
5011 }
5012
5013 static double
5014 zoom_for_size_fit_width (gdouble doc_width,
5015                          gdouble doc_height,
5016                          int     target_width,
5017                          int     target_height)
5018 {
5019         return (double)target_width / doc_width;
5020 }
5021
5022 static double
5023 zoom_for_size_fit_height (gdouble doc_width,
5024                           gdouble doc_height,
5025                           int     target_width,
5026                           int     target_height)
5027 {
5028         return (double)target_height / doc_height;
5029 }
5030
5031 static double
5032 zoom_for_size_best_fit (gdouble doc_width,
5033                         gdouble doc_height,
5034                         int     target_width,
5035                         int     target_height)
5036 {
5037         double w_scale;
5038         double h_scale;
5039
5040         w_scale = (double)target_width / doc_width;
5041         h_scale = (double)target_height / doc_height;
5042
5043         return MIN (w_scale, h_scale);
5044 }
5045
5046 static void
5047 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5048                                                 int     width,
5049                                                 int     height)
5050 {
5051         gdouble doc_width, doc_height;
5052         GtkBorder border;
5053         gdouble scale;
5054         gint sb_size;
5055
5056         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5057         if (view->rotation == 90 || view->rotation == 270) {
5058                 gdouble tmp;
5059
5060                 tmp = doc_width;
5061                 doc_width = doc_height;
5062                 doc_height = tmp;
5063         }
5064
5065         compute_border (view, doc_width, doc_height, &border);
5066
5067         doc_width *= 2;
5068         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5069         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5070
5071         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5072
5073         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5074                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5075         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5076                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5077         else
5078                 g_assert_not_reached ();
5079
5080         ev_document_model_set_scale (view->model, scale);
5081 }
5082
5083 static void
5084 ev_view_zoom_for_size_continuous (EvView *view,
5085                                   int     width,
5086                                   int     height)
5087 {
5088         gdouble doc_width, doc_height;
5089         GtkBorder border;
5090         gdouble scale;
5091         gint sb_size;
5092
5093         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5094         if (view->rotation == 90 || view->rotation == 270) {
5095                 gdouble tmp;
5096
5097                 tmp = doc_width;
5098                 doc_width = doc_height;
5099                 doc_height = tmp;
5100         }
5101
5102         compute_border (view, doc_width, doc_height, &border);
5103
5104         width -= (border.left + border.right + 2 * view->spacing);
5105         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5106
5107         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5108
5109         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5110                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5111         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5112                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5113         else
5114                 g_assert_not_reached ();
5115
5116         ev_document_model_set_scale (view->model, scale);
5117 }
5118
5119 static void
5120 ev_view_zoom_for_size_dual_page (EvView *view,
5121                                  int     width,
5122                                  int     height)
5123 {
5124         GtkBorder border;
5125         gdouble doc_width, doc_height;
5126         gdouble scale;
5127         gint other_page;
5128
5129         other_page = view->current_page ^ 1;
5130
5131         /* Find the largest of the two. */
5132         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5133         if (other_page < ev_document_get_n_pages (view->document)) {
5134                 gdouble width_2, height_2;
5135
5136                 get_doc_page_size (view, other_page, &width_2, &height_2);
5137                 if (width_2 > doc_width)
5138                         doc_width = width_2;
5139                 if (height_2 > doc_height)
5140                         doc_height = height_2;
5141         }
5142         compute_border (view, width, height, &border);
5143
5144         doc_width = doc_width * 2;
5145         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5146         height -= (border.top + border.bottom + 2 * view->spacing);
5147
5148         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5149                 gint sb_size;
5150
5151                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5152                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5153         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5154                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5155         else
5156                 g_assert_not_reached ();
5157
5158         ev_document_model_set_scale (view->model, scale);
5159 }
5160
5161 static void
5162 ev_view_zoom_for_size_single_page (EvView *view,
5163                                    int     width,
5164                                    int     height)
5165 {
5166         gdouble doc_width, doc_height;
5167         GtkBorder border;
5168         gdouble scale;
5169
5170         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5171
5172         /* Get an approximate border */
5173         compute_border (view, width, height, &border);
5174
5175         width -= (border.left + border.right + 2 * view->spacing);
5176         height -= (border.top + border.bottom + 2 * view->spacing);
5177
5178         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5179                 gint sb_size;
5180
5181                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5182                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5183         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5184                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5185         else
5186                 g_assert_not_reached ();
5187
5188         ev_document_model_set_scale (view->model, scale);
5189 }
5190
5191 static void
5192 ev_view_zoom_for_size (EvView *view,
5193                        int     width,
5194                        int     height)
5195 {
5196         g_return_if_fail (EV_IS_VIEW (view));
5197         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5198                           view->sizing_mode == EV_SIZING_BEST_FIT);
5199         g_return_if_fail (width >= 0);
5200         g_return_if_fail (height >= 0);
5201
5202         if (view->document == NULL)
5203                 return;
5204
5205         if (view->continuous && view->dual_page)
5206                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5207         else if (view->continuous)
5208                 ev_view_zoom_for_size_continuous (view, width, height);
5209         else if (view->dual_page)
5210                 ev_view_zoom_for_size_dual_page (view, width, height);
5211         else
5212                 ev_view_zoom_for_size_single_page (view, width, height);
5213 }
5214
5215 /*** Find ***/
5216 static gint
5217 ev_view_find_get_n_results (EvView *view, gint page)
5218 {
5219         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5220 }
5221
5222 static EvRectangle *
5223 ev_view_find_get_result (EvView *view, gint page, gint result)
5224 {
5225         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5226 }
5227
5228 static void
5229 jump_to_find_result (EvView *view)
5230 {
5231         gint n_results;
5232         gint page = view->current_page;
5233
5234         n_results = ev_view_find_get_n_results (view, page);
5235
5236         if (n_results > 0 && view->find_result < n_results) {
5237                 EvRectangle *rect;
5238                 GdkRectangle view_rect;
5239
5240                 rect = ev_view_find_get_result (view, page, view->find_result);
5241                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5242                 ensure_rectangle_is_visible (view, &view_rect);
5243                 view->jump_to_find_result = FALSE;
5244         }
5245 }
5246
5247 /**
5248  * jump_to_find_page
5249  * @view: #EvView instance
5250  * @direction: Direction to look
5251  * @shift: Shift from current page
5252  *
5253  * Jumps to the first page that has occurences of searched word.
5254  * Uses a direction where to look and a shift from current page.
5255  *
5256  */
5257 static void
5258 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5259 {
5260         int n_pages, i;
5261
5262         n_pages = ev_document_get_n_pages (view->document);
5263
5264         for (i = 0; i < n_pages; i++) {
5265                 int page;
5266
5267                 if (direction == EV_VIEW_FIND_NEXT)
5268                         page = view->current_page + i;
5269                 else
5270                         page = view->current_page - i;
5271                 page += shift;
5272
5273                 if (page >= n_pages) {
5274                         page = page - n_pages;
5275                 } else if (page < 0)
5276                         page = page + n_pages;
5277
5278                 if (ev_view_find_get_n_results (view, page) > 0) {
5279                         ev_document_model_set_page (view->model, page);
5280                         break;
5281                 }
5282         }
5283 }
5284
5285 void
5286 ev_view_find_changed (EvView *view, GList **results, gint page)
5287 {
5288         view->find_pages = results;
5289
5290         if (view->jump_to_find_result == TRUE) {
5291                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5292                 jump_to_find_result (view);
5293         }
5294
5295         if (view->current_page == page)
5296                 gtk_widget_queue_draw (GTK_WIDGET (view));
5297 }
5298
5299 void
5300 ev_view_find_next (EvView *view)
5301 {
5302         gint n_results;
5303
5304         n_results = ev_view_find_get_n_results (view, view->current_page);
5305         view->find_result++;
5306
5307         if (view->find_result >= n_results) {
5308                 view->find_result = 0;
5309                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5310                 jump_to_find_result (view);
5311         } else {
5312                 jump_to_find_result (view);
5313                 gtk_widget_queue_draw (GTK_WIDGET (view));
5314         }
5315 }
5316
5317 void
5318 ev_view_find_previous (EvView *view)
5319 {
5320         view->find_result--;
5321
5322         if (view->find_result < 0) {
5323                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5324                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5325                 jump_to_find_result (view);
5326         } else {
5327                 jump_to_find_result (view);
5328                 gtk_widget_queue_draw (GTK_WIDGET (view));
5329         }
5330 }
5331
5332 void
5333 ev_view_find_search_changed (EvView *view)
5334 {
5335         /* search string has changed, focus on new search result */
5336         view->jump_to_find_result = TRUE;
5337         view->find_pages = NULL;
5338 }
5339
5340 void
5341 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5342 {
5343         view->highlight_find_results = value;
5344         gtk_widget_queue_draw (GTK_WIDGET (view));
5345 }
5346
5347 void
5348 ev_view_find_cancel (EvView *view)
5349 {
5350         view->find_pages = NULL;
5351 }
5352
5353 /*** Synctex ***/
5354 void
5355 ev_view_highlight_forward_search (EvView       *view,
5356                                   EvSourceLink *link)
5357 {
5358         EvMapping   *mapping;
5359         gint         page;
5360         GdkRectangle view_rect;
5361
5362         if (!ev_document_has_synctex (view->document))
5363                 return;
5364
5365         mapping = ev_document_synctex_forward_search (view->document, link);
5366         if (!mapping)
5367                 return;
5368
5369         if (view->synctex_result)
5370                 g_free (view->synctex_result);
5371         view->synctex_result = mapping;
5372
5373         page = GPOINTER_TO_INT (mapping->data);
5374         ev_document_model_set_page (view->model, page);
5375
5376         doc_rect_to_view_rect (view, page, &mapping->area, &view_rect);
5377         ensure_rectangle_is_visible (view, &view_rect);
5378         gtk_widget_queue_draw (GTK_WIDGET (view));
5379 }
5380
5381 /*** Selections ***/
5382
5383 /* compute_new_selection_rect/text calculates the area currently selected by
5384  * view_rect.  each handles a different mode;
5385  */
5386 static GList *
5387 compute_new_selection_rect (EvView       *view,
5388                             GdkPoint     *start,
5389                             GdkPoint     *stop)
5390 {
5391         GdkRectangle view_rect;
5392         int n_pages, i;
5393         GList *list = NULL;
5394
5395         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5396
5397         view_rect.x = MIN (start->x, stop->x);
5398         view_rect.y = MIN (start->y, stop->y);
5399         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5400         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5401
5402         n_pages = ev_document_get_n_pages (view->document);
5403
5404         for (i = 0; i < n_pages; i++) {
5405                 GdkRectangle page_area;
5406                 GtkBorder border;
5407
5408                 if (ev_view_get_page_extents (view, i, &page_area, &border)) {
5409                         GdkRectangle overlap;
5410
5411                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5412                                 EvViewSelection *selection;
5413
5414                                 selection = g_new0 (EvViewSelection, 1);
5415                                 selection->page = i;
5416                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5417                                                        &(selection->rect));
5418
5419                                 list = g_list_append (list, selection);
5420                         }
5421                 }
5422         }
5423
5424         return list;
5425 }
5426
5427 static gboolean
5428 gdk_rectangle_point_in (GdkRectangle *rectangle,
5429                         GdkPoint     *point)
5430 {
5431         return rectangle->x <= point->x &&
5432                 rectangle->y <= point->y &&
5433                 point->x < rectangle->x + rectangle->width &&
5434                 point->y < rectangle->y + rectangle->height;
5435 }
5436
5437 static GList *
5438 compute_new_selection_text (EvView          *view,
5439                             EvSelectionStyle style,
5440                             GdkPoint        *start,
5441                             GdkPoint        *stop)
5442 {
5443         int n_pages, i, first, last;
5444         GList *list = NULL;
5445         EvViewSelection *selection;
5446         gdouble width, height;
5447         int start_page, end_page;
5448
5449         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5450
5451         n_pages = ev_document_get_n_pages (view->document);
5452
5453         /* First figure out the range of pages the selection
5454          * affects. */
5455         first = n_pages;
5456         last = 0;
5457         if (view->continuous) {
5458                 start_page = 0;
5459                 end_page = n_pages;
5460         } else if (view->dual_page) {
5461                 start_page = view->start_page;
5462                 end_page = view->end_page + 1;
5463         } else {
5464                 start_page = view->current_page;
5465                 end_page = view->current_page + 1;
5466         }
5467
5468         for (i = start_page; i < end_page; i++) {
5469                 GdkRectangle page_area;
5470                 GtkBorder border;
5471
5472                 ev_view_get_page_extents (view, i, &page_area, &border);
5473                 if (gdk_rectangle_point_in (&page_area, start) ||
5474                     gdk_rectangle_point_in (&page_area, stop)) {
5475                         if (first == n_pages)
5476                                 first = i;
5477                         last = i;
5478                 }
5479
5480         }
5481
5482         /* Now create a list of EvViewSelection's for the affected
5483          * pages.  This could be an empty list, a list of just one
5484          * page or a number of pages.*/
5485         for (i = first; i < last + 1; i++) {
5486                 GdkRectangle page_area;
5487                 GtkBorder border;
5488                 GdkPoint *point;
5489
5490                 get_doc_page_size (view, i, &width, &height);
5491
5492                 selection = g_new0 (EvViewSelection, 1);
5493                 selection->page = i;
5494                 selection->style = style;
5495                 selection->rect.x1 = selection->rect.y1 = 0;
5496                 selection->rect.x2 = width;
5497                 selection->rect.y2 = height;
5498
5499                 ev_view_get_page_extents (view, i, &page_area, &border);
5500
5501                 if (gdk_rectangle_point_in (&page_area, start))
5502                         point = start;
5503                 else
5504                         point = stop;
5505
5506                 if (i == first)
5507                         view_point_to_doc_point (view, point, &page_area,
5508                                                  &selection->rect.x1,
5509                                                  &selection->rect.y1);
5510
5511                 /* If the selection is contained within just one page,
5512                  * make sure we don't write 'start' into both points
5513                  * in selection->rect. */
5514                 if (first == last)
5515                         point = stop;
5516
5517                 if (i == last)
5518                         view_point_to_doc_point (view, point, &page_area,
5519                                                  &selection->rect.x2,
5520                                                  &selection->rect.y2);
5521
5522                 list = g_list_append (list, selection);
5523         }
5524
5525         return list;
5526 }
5527
5528 /* This function takes the newly calculated list, and figures out which regions
5529  * have changed.  It then queues a redraw approporiately.
5530  */
5531 static void
5532 merge_selection_region (EvView *view,
5533                         GList  *new_list)
5534 {
5535         GList *old_list;
5536         GList *new_list_ptr, *old_list_ptr;
5537
5538         /* Update the selection */
5539         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5540         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5541         g_list_free (view->selection_info.selections);
5542         view->selection_info.selections = new_list;
5543         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5544         g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
5545
5546         new_list_ptr = new_list;
5547         old_list_ptr = old_list;
5548
5549         while (new_list_ptr || old_list_ptr) {
5550                 EvViewSelection *old_sel, *new_sel;
5551                 int cur_page;
5552                 GdkRegion *region = NULL;
5553
5554                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5555                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5556
5557                 /* Assume that the lists are in order, and we run through them
5558                  * comparing them, one page at a time.  We come out with the
5559                  * first page we see. */
5560                 if (new_sel && old_sel) {
5561                         if (new_sel->page < old_sel->page) {
5562                                 new_list_ptr = new_list_ptr->next;
5563                                 old_sel = NULL;
5564                         } else if (new_sel->page > old_sel->page) {
5565                                 old_list_ptr = old_list_ptr->next;
5566                                 new_sel = NULL;
5567                         } else {
5568                                 new_list_ptr = new_list_ptr->next;
5569                                 old_list_ptr = old_list_ptr->next;
5570                         }
5571                 } else if (new_sel) {
5572                         new_list_ptr = new_list_ptr->next;
5573                 } else if (old_sel) {
5574                         old_list_ptr = old_list_ptr->next;
5575                 }
5576
5577                 g_assert (new_sel || old_sel);
5578
5579                 /* is the page we're looking at on the screen?*/
5580                 cur_page = new_sel ? new_sel->page : old_sel->page;
5581                 if (cur_page < view->start_page || cur_page > view->end_page)
5582                         continue;
5583
5584                 /* seed the cache with a new page.  We are going to need the new
5585                  * region too. */
5586                 if (new_sel) {
5587                         GdkRegion *tmp_region = NULL;
5588
5589                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5590                                                                cur_page,
5591                                                                view->scale,
5592                                                                &tmp_region);
5593
5594                         if (tmp_region && !gdk_region_empty (tmp_region)) {
5595                                 new_sel->covered_region = gdk_region_copy (tmp_region);
5596                         }
5597                 }
5598
5599                 /* Now we figure out what needs redrawing */
5600                 if (old_sel && new_sel) {
5601                         if (old_sel->covered_region && new_sel->covered_region) {
5602                                 /* We only want to redraw the areas that have
5603                                  * changed, so we xor the old and new regions
5604                                  * and redraw if it's different */
5605                                 region = gdk_region_copy (old_sel->covered_region);
5606                                 gdk_region_xor (region, new_sel->covered_region);
5607                                 if (gdk_region_empty (region)) {
5608                                         gdk_region_destroy (region);
5609                                         region = NULL;
5610                                 }
5611                         } else if (old_sel->covered_region) {
5612                                 region = gdk_region_copy (old_sel->covered_region);
5613                         } else if (new_sel->covered_region) {
5614                                 region = gdk_region_copy (new_sel->covered_region);
5615                         }
5616                 } else if (old_sel && !new_sel) {
5617                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
5618                                 region = gdk_region_copy (old_sel->covered_region);
5619                         }
5620                 } else if (!old_sel && new_sel) {
5621                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
5622                                 region = gdk_region_copy (new_sel->covered_region);
5623                         }
5624                 } else {
5625                         g_assert_not_reached ();
5626                 }
5627
5628                 /* Redraw the damaged region! */
5629                 if (region) {
5630                         GdkWindow   *bin_window;
5631                         GdkRectangle page_area;
5632                         GtkBorder    border;
5633
5634                         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
5635
5636                         /* I don't know why but the region is smaller
5637                          * than expected. This hack fixes it, I guess
5638                          * 10 pixels more won't hurt
5639                          */
5640                         gdk_region_shrink (region, -5, -5);
5641
5642                         ev_view_get_page_extents (view, cur_page, &page_area, &border);
5643                         gdk_region_offset (region,
5644                                            page_area.x + border.left - view->scroll_x,
5645                                            page_area.y + border.top - view->scroll_y);
5646                         gdk_window_invalidate_region (bin_window, region, TRUE);
5647                         gdk_region_destroy (region);
5648                 }
5649         }
5650
5651         /* Free the old list, now that we're done with it. */
5652         g_list_foreach (old_list, (GFunc) selection_free, NULL);
5653         g_list_free (old_list);
5654 }
5655
5656 static void
5657 compute_selections (EvView          *view,
5658                     EvSelectionStyle style,
5659                     GdkPoint        *start,
5660                     GdkPoint        *stop)
5661 {
5662         GList *list;
5663
5664         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
5665                 list = compute_new_selection_rect (view, start, stop);
5666         else
5667                 list = compute_new_selection_text (view, style, start, stop);
5668         merge_selection_region (view, list);
5669 }
5670
5671 /* Free's the selection.  It's up to the caller to queue redraws if needed.
5672  */
5673 static void
5674 selection_free (EvViewSelection *selection)
5675 {
5676         if (selection->covered_region)
5677                 gdk_region_destroy (selection->covered_region);
5678         g_free (selection);
5679 }
5680
5681 static void
5682 clear_selection (EvView *view)
5683 {
5684         if (view->selection_info.selections) {
5685                 g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5686                 g_list_free (view->selection_info.selections);
5687                 view->selection_info.selections = NULL;
5688
5689                 g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
5690         }
5691         view->selection_info.in_selection = FALSE;
5692         if (view->pixbuf_cache)
5693                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
5694 }
5695
5696 void
5697 ev_view_select_all (EvView *view)
5698 {
5699         GList *selections = NULL;
5700         int n_pages, i;
5701
5702         /* Disable selection on rotated pages for the 0.4.0 series */
5703         if (view->rotation != 0)
5704                 return;
5705
5706         clear_selection (view);
5707
5708         n_pages = ev_document_get_n_pages (view->document);
5709         for (i = 0; i < n_pages; i++) {
5710                 gdouble width, height;
5711                 EvViewSelection *selection;
5712
5713                 get_doc_page_size (view, i, &width, &height);
5714
5715                 selection = g_new0 (EvViewSelection, 1);
5716                 selection->page = i;
5717                 selection->style = EV_SELECTION_STYLE_GLYPH;
5718                 selection->rect.x1 = selection->rect.y1 = 0;
5719                 selection->rect.x2 = width;
5720                 selection->rect.y2 = height;
5721
5722                 selections = g_list_append (selections, selection);
5723         }
5724
5725         merge_selection_region (view, selections);
5726         gtk_widget_queue_draw (GTK_WIDGET (view));
5727 }
5728
5729 gboolean
5730 ev_view_get_has_selection (EvView *view)
5731 {
5732         return view->selection_info.selections != NULL;
5733 }
5734
5735 static char *
5736 get_selected_text (EvView *view)
5737 {
5738         GString *text;
5739         GList *l;
5740         gchar *normalized_text;
5741
5742         text = g_string_new (NULL);
5743
5744         ev_document_doc_mutex_lock ();
5745
5746         for (l = view->selection_info.selections; l != NULL; l = l->next) {
5747                 EvViewSelection *selection = (EvViewSelection *)l->data;
5748                 EvPage *page;
5749                 gchar *tmp;
5750
5751                 page = ev_document_get_page (view->document, selection->page);
5752                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
5753                                                       page, selection->style,
5754                                                       &(selection->rect));
5755                 g_object_unref (page);
5756                 g_string_append (text, tmp);
5757                 g_free (tmp);
5758         }
5759
5760         ev_document_doc_mutex_unlock ();
5761
5762         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
5763         g_string_free (text, TRUE);
5764         return normalized_text;
5765 }
5766
5767 static void
5768 ev_view_clipboard_copy (EvView      *view,
5769                         const gchar *text)
5770 {
5771         GtkClipboard *clipboard;
5772
5773         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
5774                                               GDK_SELECTION_CLIPBOARD);
5775         gtk_clipboard_set_text (clipboard, text, -1);
5776 }
5777
5778 void
5779 ev_view_copy (EvView *ev_view)
5780 {
5781         char *text;
5782
5783         if (!EV_IS_SELECTION (ev_view->document))
5784                 return;
5785
5786         text = get_selected_text (ev_view);
5787         ev_view_clipboard_copy (ev_view, text);
5788         g_free (text);
5789 }
5790
5791 static void
5792 ev_view_primary_get_cb (GtkClipboard     *clipboard,
5793                         GtkSelectionData *selection_data,
5794                         guint             info,
5795                         gpointer          data)
5796 {
5797         EvView *ev_view = EV_VIEW (data);
5798
5799         if (ev_view->link_selected) {
5800                 gtk_selection_data_set_text (selection_data,
5801                                              ev_link_action_get_uri (ev_view->link_selected),
5802                                              -1);
5803         } else if (EV_IS_SELECTION (ev_view->document) &&
5804                    ev_view->selection_info.selections) {
5805                 gchar *text;
5806
5807                 text = get_selected_text (ev_view);
5808                 if (text) {
5809                         gtk_selection_data_set_text (selection_data, text, -1);
5810                         g_free (text);
5811                 }
5812         }
5813 }
5814
5815 static void
5816 ev_view_primary_clear_cb (GtkClipboard *clipboard,
5817                           gpointer      data)
5818 {
5819         EvView *view = EV_VIEW (data);
5820
5821         clear_selection (view);
5822         clear_link_selected (view);
5823 }
5824
5825 static void
5826 ev_view_update_primary_selection (EvView *ev_view)
5827 {
5828         GtkClipboard *clipboard;
5829
5830         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
5831                                               GDK_SELECTION_PRIMARY);
5832
5833         if (ev_view->selection_info.selections || ev_view->link_selected) {
5834                 GtkTargetList *target_list;
5835                 GtkTargetEntry *targets;
5836                 int n_targets;
5837
5838                 target_list = gtk_target_list_new (NULL, 0);
5839                 gtk_target_list_add_text_targets (target_list, 0);
5840                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
5841                 gtk_target_list_unref (target_list);
5842
5843                 if (!gtk_clipboard_set_with_owner (clipboard,
5844                                                    targets, n_targets,
5845                                                    ev_view_primary_get_cb,
5846                                                    ev_view_primary_clear_cb,
5847                                                    G_OBJECT (ev_view)))
5848                         ev_view_primary_clear_cb (clipboard, ev_view);
5849
5850                 gtk_target_table_free (targets, n_targets);
5851         } else {
5852                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
5853                         gtk_clipboard_clear (clipboard);
5854         }
5855 }
5856
5857 static void
5858 clear_link_selected (EvView *view)
5859 {
5860         if (view->link_selected) {
5861                 g_object_unref (view->link_selected);
5862                 view->link_selected = NULL;
5863         }
5864 }
5865
5866 void
5867 ev_view_copy_link_address (EvView       *view,
5868                            EvLinkAction *action)
5869 {
5870         clear_link_selected (view);
5871
5872         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
5873
5874         view->link_selected = g_object_ref (action);
5875         ev_view_update_primary_selection (view);
5876 }
5877
5878 /*** Cursor operations ***/
5879 static void
5880 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
5881 {
5882         GdkCursor *cursor = NULL;
5883         GtkWidget *widget;
5884         GdkWindow *bin_window;
5885
5886         if (view->cursor == new_cursor) {
5887                 return;
5888         }
5889
5890         view->cursor = new_cursor;
5891
5892         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
5893         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
5894         cursor = ev_view_cursor_new (gtk_widget_get_display (widget), new_cursor);
5895         gdk_window_set_cursor (bin_window, cursor);
5896         gdk_flush ();
5897         if (cursor)
5898                 gdk_cursor_unref (cursor);
5899 }
5900
5901 void
5902 ev_view_hide_cursor (EvView *view)
5903 {
5904        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
5905 }
5906
5907 void
5908 ev_view_show_cursor (EvView *view)
5909 {
5910        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
5911 }
5912
5913 gboolean
5914 ev_view_next_page (EvView *view)
5915 {
5916         int page, n_pages;
5917
5918         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5919
5920         if (!view->document)
5921                 return FALSE;
5922
5923         page = ev_document_model_get_page (view->model);
5924         n_pages = ev_document_get_n_pages (view->document);
5925
5926         if (view->dual_page)
5927                 page = page + 2;
5928         else
5929                 page = page + 1;
5930
5931         if (page < n_pages) {
5932                 ev_document_model_set_page (view->model, page);
5933                 return TRUE;
5934         } else if (view->dual_page && page == n_pages) {
5935                 ev_document_model_set_page (view->model, page - 1);
5936                 return TRUE;
5937         } else {
5938                 return FALSE;
5939         }
5940 }
5941
5942 gboolean
5943 ev_view_previous_page (EvView *view)
5944 {
5945         int page;
5946
5947         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5948
5949         if (!view->document)
5950                 return FALSE;
5951
5952         page = ev_document_model_get_page (view->model);
5953
5954         if (view->dual_page)
5955                 page = page - 2;
5956         else
5957                 page = page - 1;
5958
5959         if (page >= 0) {
5960                 ev_document_model_set_page (view->model, page);
5961                 return TRUE;
5962         } else if (view->dual_page && page == -1) {
5963                 ev_document_model_set_page (view->model, 0);
5964                 return TRUE;
5965         } else {
5966                 return FALSE;
5967         }
5968 }
5969