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-list.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                                                               cairo_region_t     *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                                                               cairo_region_t     *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         cairo_region_t *text_region, *region;
 807         GtkAllocation allocation;
 808         gint page;
 809         GdkRectangle rect;
 810         EvRectangle doc_rect;
 811         GdkRectangle page_area;
 812         GtkBorder border;
 813         gdouble fraction = 1.0;
 814
 815         if (scroll != GTK_SCROLL_PAGE_BACKWARD && scroll != GTK_SCROLL_PAGE_FORWARD)
 816                 return gtk_adjustment_get_page_size (adjustment);
 817
 818         page = scroll == GTK_SCROLL_PAGE_BACKWARD ? view->start_page : view->end_page;
 819
 820         text_region = ev_page_cache_get_text_mapping (view->page_cache, page);
 821         if (!text_region || cairo_region_is_empty (text_region))
 822                 return gtk_adjustment_get_page_size (adjustment);
 823
 824         gtk_widget_get_allocation (widget, &allocation);
 825         ev_view_get_page_extents (view, page, &page_area, &border);
 826         rect.x = page_area.x + view->scroll_x;
 827         rect.y = view->scroll_y + (scroll == GTK_SCROLL_PAGE_BACKWARD ? 5 : allocation.height - 5);
 828         rect.width = page_area.width;
 829         rect.height = 1;
 830         view_rect_to_doc_rect (view, &rect, &page_area, &doc_rect);
 831
 832         /* Convert the doc rectangle into a GdkRectangle */
 833         rect.x = doc_rect.x1;
 834         rect.y = doc_rect.y1;
 835         rect.width = doc_rect.x2 - doc_rect.x1;
 836         rect.height = MAX (1, doc_rect.y2 - doc_rect.y1);
 837         region = cairo_region_create_rectangle (&rect);
 838
 839         cairo_region_intersect (region, text_region);
 840         if (cairo_region_num_rectangles (region)) {
 841                 EvRenderContext *rc;
 842                 EvPage  *ev_page;
 843                 cairo_region_t *sel_region;
 844
 845                 cairo_region_get_rectangle (region, 0, &rect);
 846                 ev_page = ev_document_get_page (view->document, page);
 847                 rc = ev_render_context_new (ev_page, view->rotation, view->scale);
 848                 g_object_unref (ev_page);
 849                 /* Get the selection region to know the height of the line */
 850                 doc_rect.x1 = doc_rect.x2 = rect.x + 0.5;
 851                 doc_rect.y1 = doc_rect.y2 = rect.y + 0.5;
 852
 853                 ev_document_doc_mutex_lock ();
 854                 sel_region = ev_selection_get_selection_region (EV_SELECTION (view->document),
 855                                                                 rc, EV_SELECTION_STYLE_LINE,
 856                                                                 &doc_rect);
 857                 ev_document_doc_mutex_unlock ();
 858
 859                 g_object_unref (rc);
 860
 861                 if (cairo_region_num_rectangles (sel_region) > 0) {
 862                         cairo_region_get_rectangle (sel_region, 0, &rect);
 863                         fraction = 1 - (rect.height / gtk_adjustment_get_page_size (adjustment));
 864                 }
 865                 cairo_region_destroy (sel_region);
 866         }
 867         cairo_region_destroy (region);
 868
 869         return gtk_adjustment_get_page_size (adjustment) * fraction;
 870
 871 }
 872
 873 void
 874 ev_view_scroll (EvView        *view,
 875                 GtkScrollType  scroll,
 876                 gboolean       horizontal)
 877 {
 878         GtkAdjustment *adjustment;
 879         double value, increment;
 880         gdouble upper, lower;
 881         gdouble page_size;
 882         gdouble step_increment;
 883         gboolean first_page = FALSE;
 884         gboolean last_page = FALSE;
 885
 886         view->jump_to_find_result = FALSE;
 887
 888         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
 889                 switch (scroll) {
 890                         case GTK_SCROLL_PAGE_BACKWARD:
 891                         case GTK_SCROLL_STEP_BACKWARD:
 892                                 ev_view_previous_page (view);
 893                                 break;
 894                         case GTK_SCROLL_PAGE_FORWARD:
 895                         case GTK_SCROLL_STEP_FORWARD:
 896                                 ev_view_next_page (view);
 897                                 break;
 898                         default:
 899                                 break;
 900                 }
 901                 return;
 902         }
 903
 904         /* Assign values for increment and vertical adjustment */
 905         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 906         value = gtk_adjustment_get_value (adjustment);
 907         upper = gtk_adjustment_get_upper (adjustment);
 908         lower = gtk_adjustment_get_lower (adjustment);
 909         page_size = gtk_adjustment_get_page_size (adjustment);
 910         step_increment = gtk_adjustment_get_step_increment (adjustment);
 911
 912         /* Assign boolean for first and last page */
 913         if (view->current_page == 0)
 914                 first_page = TRUE;
 915         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 916                 last_page = TRUE;
 917
 918         switch (scroll) {
 919                 case GTK_SCROLL_PAGE_BACKWARD:
 920                         /* Do not jump backwards if at the first page */
 921                         if (value == lower && first_page) {
 922                                 /* Do nothing */
 923                                 /* At the top of a page, assign the upper bound limit of previous page */
 924                         } else if (value == lower) {
 925                                 value = upper - page_size;
 926                                 ev_view_previous_page (view);
 927                                 /* Jump to the top */
 928                         } else {
 929                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_BACKWARD);
 930                                 value = MAX (value - increment, lower);
 931                         }
 932                         break;
 933                 case GTK_SCROLL_PAGE_FORWARD:
 934                         /* Do not jump forward if at the last page */
 935                         if (value == (upper - page_size) && last_page) {
 936                                 /* Do nothing */
 937                         /* At the bottom of a page, assign the lower bound limit of next page */
 938                         } else if (value == (upper - page_size)) {
 939                                 value = 0;
 940                                 ev_view_next_page (view);
 941                         /* Jump to the bottom */
 942                         } else {
 943                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_FORWARD);
 944                                 value = MIN (value + increment, upper - page_size);
 945                         }
 946                         break;
 947                 case GTK_SCROLL_STEP_BACKWARD:
 948                         value -= step_increment;
 949                         break;
 950                 case GTK_SCROLL_STEP_FORWARD:
 951                         value += step_increment;
 952                         break;
 953                 case GTK_SCROLL_STEP_DOWN:
 954                         value -= step_increment / 10;
 955                         break;
 956                 case GTK_SCROLL_STEP_UP:
 957                         value += step_increment / 10;
 958                         break;
 959                 default:
 960                         break;
 961         }
 962
 963         value = CLAMP (value, lower, upper - page_size);
 964
 965         gtk_adjustment_set_value (adjustment, value);
 966 }
 967
 968 #define MARGIN 5
 969
 970 static void
 971 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 972 {
 973         GtkWidget *widget = GTK_WIDGET (view);
 974         GtkAdjustment *adjustment;
 975         GtkAllocation allocation;
 976         gdouble adj_value;
 977         int value;
 978
 979         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 980
 981         gtk_widget_get_allocation (widget, &allocation);
 982
 983         adjustment = view->vadjustment;
 984         adj_value = gtk_adjustment_get_value (adjustment);
 985
 986         if (rect->y < adj_value) {
 987                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->y - MARGIN);
 988                 gtk_adjustment_set_value (view->vadjustment, value);
 989         } else if (rect->y + rect->height > adj_value + allocation.height) {
 990                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->y + rect->height -
 991                              allocation.height + MARGIN);
 992                 gtk_adjustment_set_value (view->vadjustment, value);
 993         }
 994
 995         adjustment = view->hadjustment;
 996         adj_value = gtk_adjustment_get_value (adjustment);
 997
 998         if (rect->x < adj_value) {
 999                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->x - MARGIN);
1000                 gtk_adjustment_set_value (view->hadjustment, value);
1001         } else if (rect->x + rect->height > adj_value + allocation.width) {
1002                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->x + rect->width -
1003                              allocation.width + MARGIN);
1004                 gtk_adjustment_set_value (view->hadjustment, value);
1005         }
1006
1007         gtk_widget_queue_resize (GTK_WIDGET (view));
1008 }
1009
1010 /*** Geometry computations ***/
1011
1012 static void
1013 compute_border (EvView *view, int width, int height, GtkBorder *border)
1014 {
1015         ev_document_misc_get_page_border_size (width, height, border);
1016 }
1017
1018 void
1019 _get_page_size_for_scale_and_rotation (EvDocument *document,
1020                                        gint        page,
1021                                        gdouble     scale,
1022                                        gint        rotation,
1023                                        gint       *page_width,
1024                                        gint       *page_height)
1025 {
1026         gdouble w, h;
1027         gint    width, height;
1028
1029         ev_document_get_page_size (document, page, &w, &h);
1030
1031         width = (gint)(w * scale + 0.5);
1032         height = (gint)(h * scale + 0.5);
1033
1034         if (page_width)
1035                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
1036         if (page_height)
1037                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
1038 }
1039
1040 static void
1041 ev_view_get_page_size (EvView *view,
1042                        gint    page,
1043                        gint   *page_width,
1044                        gint   *page_height)
1045 {
1046         _get_page_size_for_scale_and_rotation (view->document,
1047                                                page,
1048                                                view->scale,
1049                                                view->rotation,
1050                                                page_width,
1051                                                page_height);
1052 }
1053
1054 static void
1055 ev_view_get_max_page_size (EvView *view,
1056                            gint   *max_width,
1057                            gint   *max_height)
1058 {
1059         double w, h;
1060         gint   width, height;
1061
1062         ev_document_get_max_page_size (view->document, &w, &h);
1063
1064         width = (gint)(w * view->scale + 0.5);
1065         height = (gint)(h * view->scale + 0.5);
1066
1067         if (max_width)
1068                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
1069         if (max_height)
1070                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
1071 }
1072
1073 static void
1074 get_page_y_offset (EvView *view, int page, int *y_offset)
1075 {
1076         int max_width, offset;
1077         GtkBorder border;
1078
1079         g_return_if_fail (y_offset != NULL);
1080
1081         ev_view_get_max_page_size (view, &max_width, NULL);
1082         compute_border (view, max_width, max_width, &border);
1083
1084         if (view->dual_page) {
1085                 ev_view_get_height_to_page (view, page, NULL, &offset);
1086                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
1087                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
1088         } else {
1089                 ev_view_get_height_to_page (view, page, &offset, NULL);
1090                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
1091         }
1092
1093         *y_offset = offset;
1094         return;
1095 }
1096
1097 gboolean
1098 ev_view_get_page_extents (EvView       *view,
1099                           gint          page,
1100                           GdkRectangle *page_area,
1101                           GtkBorder    *border)
1102 {
1103         GtkWidget *widget;
1104         int width, height;
1105         GtkAllocation allocation;
1106
1107         widget = GTK_WIDGET (view);
1108         gtk_widget_get_allocation (widget, &allocation);
1109
1110         /* Get the size of the page */
1111         ev_view_get_page_size (view, page, &width, &height);
1112         compute_border (view, width, height, border);
1113         page_area->width = width + border->left + border->right;
1114         page_area->height = height + border->top + border->bottom;
1115
1116         if (view->continuous) {
1117                 gint max_width;
1118                 gint x, y;
1119
1120                 ev_view_get_max_page_size (view, &max_width, NULL);
1121                 max_width = max_width + border->left + border->right;
1122                 /* Get the location of the bounding box */
1123                 if (view->dual_page) {
1124                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1125                         x = x + MAX (0, allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1126                         if (page % 2 == get_dual_even_left (view))
1127                                 x = x + (max_width - width - border->left - border->right);
1128                 } else {
1129                         x = view->spacing;
1130                         x = x + MAX (0, allocation.width - (width + view->spacing * 2)) / 2;
1131                 }
1132
1133                 get_page_y_offset (view, page, &y);
1134
1135                 page_area->x = x;
1136                 page_area->y = y;
1137         } else {
1138                 gint x, y;
1139                 if (view->dual_page) {
1140                         gint width_2, height_2;
1141                         gint max_width = width;
1142                         gint max_height = height;
1143                         GtkBorder overall_border;
1144                         gint other_page;
1145
1146                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1147
1148                         /* First, we get the bounding box of the two pages */
1149                         if (other_page < ev_document_get_n_pages (view->document)
1150                             && (0 <= other_page)) {
1151                                 ev_view_get_page_size (view, other_page,
1152                                                        &width_2, &height_2);
1153                                 if (width_2 > width)
1154                                         max_width = width_2;
1155                                 if (height_2 > height)
1156                                         max_height = height_2;
1157                         }
1158                         compute_border (view, max_width, max_height, &overall_border);
1159
1160                         /* Find the offsets */
1161                         x = view->spacing;
1162                         y = view->spacing;
1163
1164                         /* Adjust for being the left or right page */
1165                         if (page % 2 == get_dual_even_left (view))
1166                                 x = x + max_width - width;
1167                         else
1168                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1169
1170                         y = y + (max_height - height)/2;
1171
1172                         /* Adjust for extra allocation */
1173                         x = x + MAX (0, allocation.width -
1174                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1175                         y = y + MAX (0, allocation.height - (height + view->spacing * 2))/2;
1176                 } else {
1177                         x = view->spacing;
1178                         y = view->spacing;
1179
1180                         /* Adjust for extra allocation */
1181                         x = x + MAX (0, allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1182                         y = y + MAX (0, allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1183                 }
1184
1185                 page_area->x = x;
1186                 page_area->y = y;
1187         }
1188
1189         return TRUE;
1190 }
1191
1192 static void
1193 get_doc_page_size (EvView  *view,
1194                    gint     page,
1195                    gdouble *width,
1196                    gdouble *height)
1197 {
1198         double w, h;
1199
1200         ev_document_get_page_size (view->document, page, &w, &h);
1201         if (view->rotation == 0 || view->rotation == 180) {
1202                 if (width) *width = w;
1203                 if (height) *height = h;
1204         } else {
1205                 if (width) *width = h;
1206                 if (height) *height = w;
1207         }
1208 }
1209
1210 static void
1211 view_point_to_doc_point (EvView *view,
1212                          GdkPoint *view_point,
1213                          GdkRectangle *page_area,
1214                          double  *doc_point_x,
1215                          double  *doc_point_y)
1216 {
1217         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1218         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1219 }
1220
1221 static void
1222 view_rect_to_doc_rect (EvView *view,
1223                        GdkRectangle *view_rect,
1224                        GdkRectangle *page_area,
1225                        EvRectangle  *doc_rect)
1226 {
1227         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1228         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1229         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1230         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1231 }
1232
1233 static void
1234 doc_point_to_view_point (EvView       *view,
1235                          int           page,
1236                          EvPoint      *doc_point,
1237                          GdkPoint     *view_point)
1238 {
1239         GdkRectangle page_area;
1240         GtkBorder border;
1241         double x, y, view_x, view_y;
1242         gdouble width, height;
1243
1244         get_doc_page_size (view, page, &width, &height);
1245
1246         if (view->rotation == 0) {
1247                 x = doc_point->x;
1248                 y = doc_point->y;
1249         } else if (view->rotation == 90) {
1250                 x = width - doc_point->y;
1251                 y = doc_point->x;
1252         } else if (view->rotation == 180) {
1253                 x = width - doc_point->x;
1254                 y = height - doc_point->y;
1255         } else if (view->rotation == 270) {
1256                 x = doc_point->y;
1257                 y = height - doc_point->x;
1258         } else {
1259                 g_assert_not_reached ();
1260         }
1261
1262         ev_view_get_page_extents (view, page, &page_area, &border);
1263
1264         view_x = CLAMP (x * view->scale, 0, page_area.width);
1265         view_y = CLAMP (y * view->scale, 0, page_area.height);
1266         view_point->x = view_x + page_area.x;
1267         view_point->y = view_y + page_area.y;
1268 }
1269
1270 static void
1271 doc_rect_to_view_rect (EvView       *view,
1272                        int           page,
1273                        EvRectangle  *doc_rect,
1274                        GdkRectangle *view_rect)
1275 {
1276         GdkRectangle page_area;
1277         GtkBorder border;
1278         double x, y, w, h;
1279         gdouble width, height;
1280
1281         get_doc_page_size (view, page, &width, &height);
1282
1283         if (view->rotation == 0) {
1284                 x = doc_rect->x1;
1285                 y = doc_rect->y1;
1286                 w = doc_rect->x2 - doc_rect->x1;
1287                 h = doc_rect->y2 - doc_rect->y1;
1288         } else if (view->rotation == 90) {
1289                 x = width - doc_rect->y2;
1290                 y = doc_rect->x1;
1291                 w = doc_rect->y2 - doc_rect->y1;
1292                 h = doc_rect->x2 - doc_rect->x1;
1293         } else if (view->rotation == 180) {
1294                 x = width - doc_rect->x2;
1295                 y = height - doc_rect->y2;
1296                 w = doc_rect->x2 - doc_rect->x1;
1297                 h = doc_rect->y2 - doc_rect->y1;
1298         } else if (view->rotation == 270) {
1299                 x = doc_rect->y1;
1300                 y = height - doc_rect->x2;
1301                 w = doc_rect->y2 - doc_rect->y1;
1302                 h = doc_rect->x2 - doc_rect->x1;
1303         } else {
1304                 g_assert_not_reached ();
1305         }
1306
1307         ev_view_get_page_extents (view, page, &page_area, &border);
1308
1309         view_rect->x = x * view->scale + page_area.x;
1310         view_rect->y = y * view->scale + page_area.y;
1311         view_rect->width = w * view->scale;
1312         view_rect->height = h * view->scale;
1313 }
1314
1315 static gboolean
1316 get_dual_even_left (EvView *view)
1317 {
1318         return (ev_document_get_n_pages (view->document) > 2);
1319 }
1320
1321 static void
1322 find_page_at_location (EvView  *view,
1323                        gdouble  x,
1324                        gdouble  y,
1325                        gint    *page,
1326                        gint    *x_offset,
1327                        gint    *y_offset)
1328 {
1329         int i;
1330
1331         if (view->document == NULL)
1332                 return;
1333
1334         g_assert (page);
1335         g_assert (x_offset);
1336         g_assert (y_offset);
1337
1338         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1339                 GdkRectangle page_area;
1340                 GtkBorder border;
1341
1342                 if (! ev_view_get_page_extents (view, i, &page_area, &border))
1343                         continue;
1344
1345                 if ((x >= page_area.x + border.left) &&
1346                     (x < page_area.x + page_area.width - border.right) &&
1347                     (y >= page_area.y + border.top) &&
1348                     (y < page_area.y + page_area.height - border.bottom)) {
1349                         *page = i;
1350                         *x_offset = x - (page_area.x + border.left);
1351                         *y_offset = y - (page_area.y + border.top);
1352                         return;
1353                 }
1354         }
1355
1356         *page = -1;
1357 }
1358
1359 static gboolean
1360 location_in_text (EvView  *view,
1361                   gdouble  x,
1362                   gdouble  y)
1363 {
1364         cairo_region_t *region;
1365         gint page = -1;
1366         gint x_offset = 0, y_offset = 0;
1367
1368         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1369
1370         if (page == -1)
1371                 return FALSE;
1372
1373         region = ev_page_cache_get_text_mapping (view->page_cache, page);
1374
1375         if (region)
1376                 return cairo_region_contains_point (region, x_offset / view->scale, y_offset / view->scale);
1377         else
1378                 return FALSE;
1379 }
1380
1381 static gboolean
1382 location_in_selected_text (EvView  *view,
1383                            gdouble  x,
1384                            gdouble  y)
1385 {
1386         gint page = -1;
1387         gint x_offset = 0, y_offset = 0;
1388         EvViewSelection *selection;
1389         GList *l = NULL;
1390
1391         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1392                 selection = (EvViewSelection *)l->data;
1393
1394                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1395
1396                 if (page != selection->page)
1397                         continue;
1398
1399                 if (selection->covered_region &&
1400                     cairo_region_contains_point (selection->covered_region, x_offset, y_offset))
1401                         return TRUE;
1402         }
1403
1404         return FALSE;
1405 }
1406
1407 static gboolean
1408 get_doc_point_from_offset (EvView *view,
1409                            gint    page,
1410                            gint    x_offset,
1411                            gint    y_offset,
1412                            gint   *x_new,
1413                            gint   *y_new)
1414 {
1415         gdouble width, height;
1416         double x, y;
1417
1418         get_doc_page_size (view, page, &width, &height);
1419
1420         x_offset = x_offset / view->scale;
1421         y_offset = y_offset / view->scale;
1422
1423         if (view->rotation == 0) {
1424                 x = x_offset;
1425                 y = y_offset;
1426         } else if (view->rotation == 90) {
1427                 x = y_offset;
1428                 y = width - x_offset;
1429         } else if (view->rotation == 180) {
1430                 x = width - x_offset;
1431                 y = height - y_offset;
1432         } else if (view->rotation == 270) {
1433                 x = height - y_offset;
1434                 y = x_offset;
1435         } else {
1436                 g_assert_not_reached ();
1437         }
1438
1439         *x_new = x;
1440         *y_new = y;
1441
1442         return TRUE;
1443 }
1444
1445 static gboolean
1446 get_doc_point_from_location (EvView  *view,
1447                              gdouble  x,
1448                              gdouble  y,
1449                              gint    *page,
1450                              gint    *x_new,
1451                              gint    *y_new)
1452 {
1453         gint x_offset = 0, y_offset = 0;
1454
1455         x += view->scroll_x;
1456         y += view->scroll_y;
1457         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1458         if (*page == -1)
1459                 return FALSE;
1460
1461         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1462 }
1463
1464 static void
1465 ev_view_get_area_from_mapping (EvView        *view,
1466                                guint          page,
1467                                EvMappingList *mapping_list,
1468                                gconstpointer  data,
1469                                GdkRectangle  *area)
1470 {
1471         EvMapping *mapping;
1472
1473         mapping = ev_mapping_list_find (mapping_list, data);
1474         doc_rect_to_view_rect (view, page, &mapping->area, area);
1475         area->x -= view->scroll_x;
1476         area->y -= view->scroll_y;
1477 }
1478
1479
1480 /*** Hyperref ***/
1481 static EvLink *
1482 ev_view_get_link_at_location (EvView  *view,
1483                               gdouble  x,
1484                               gdouble  y)
1485 {
1486         gint page = -1;
1487         gint x_new = 0, y_new = 0;
1488         EvMappingList *link_mapping;
1489
1490         if (!EV_IS_DOCUMENT_LINKS (view->document))
1491                 return NULL;
1492
1493         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1494                 return NULL;
1495
1496         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
1497
1498         if (link_mapping)
1499                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1500         else
1501                 return NULL;
1502 }
1503
1504 static void
1505 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1506 {
1507         EvPoint doc_point;
1508         gdouble zoom, left, top;
1509         gboolean change_left, change_top;
1510         GtkAllocation allocation;
1511
1512         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1513
1514         left = ev_link_dest_get_left (dest, &change_left);
1515         top = ev_link_dest_get_top (dest, &change_top);
1516
1517         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1518                                        ev_link_dest_get_bottom (dest) - top,
1519                                        allocation.width,
1520                                        allocation.height);
1521
1522         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1523         ev_document_model_set_scale (view->model, zoom);
1524
1525         doc_point.x = change_left ? left : 0;
1526         doc_point.y = change_top ? top : 0;
1527         view->pending_point = doc_point;
1528
1529         ev_view_change_page (view, ev_link_dest_get_page (dest));
1530 }
1531
1532 static void
1533 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1534 {
1535         EvPoint doc_point;
1536         gdouble doc_width, doc_height;
1537         gint page;
1538         double zoom, left;
1539         gboolean change_left;
1540         GtkAllocation allocation;
1541
1542         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1543
1544         page = ev_link_dest_get_page (dest);
1545         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1546
1547         left = ev_link_dest_get_left (dest, &change_left);
1548         doc_point.x = change_left ? left : 0;
1549         doc_point.y = 0;
1550
1551         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1552                                          allocation.width,
1553                                          allocation.height);
1554
1555         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1556         ev_document_model_set_scale (view->model, zoom);
1557
1558         view->pending_point = doc_point;
1559
1560         ev_view_change_page (view, page);
1561 }
1562
1563 static void
1564 goto_fith_dest (EvView *view, EvLinkDest *dest)
1565 {
1566         EvPoint doc_point;
1567         gdouble doc_width, doc_height;
1568         gint page;
1569         gdouble zoom, top;
1570         gboolean change_top;
1571         GtkAllocation allocation;
1572
1573         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1574
1575         page = ev_link_dest_get_page (dest);
1576         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1577
1578         top = ev_link_dest_get_top (dest, &change_top);
1579
1580         doc_point.x = 0;
1581         doc_point.y = change_top ? top : 0;
1582
1583         zoom = zoom_for_size_fit_width (doc_width, top,
1584                                         allocation.width,
1585                                         allocation.height);
1586
1587         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1588         ev_document_model_set_scale (view->model, zoom);
1589
1590         view->pending_point = doc_point;
1591
1592         ev_view_change_page (view, page);
1593 }
1594
1595 static void
1596 goto_fit_dest (EvView *view, EvLinkDest *dest)
1597 {
1598         double zoom;
1599         gdouble doc_width, doc_height;
1600         int page;
1601         GtkAllocation allocation;
1602
1603         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1604
1605         page = ev_link_dest_get_page (dest);
1606         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1607
1608         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1609                                        allocation.width,
1610                                        allocation.height);
1611
1612         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1613         ev_document_model_set_scale (view->model, zoom);
1614
1615         ev_view_change_page (view, page);
1616 }
1617
1618 static void
1619 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1620 {
1621         EvPoint doc_point;
1622         gint page;
1623         gdouble zoom, left, top;
1624         gboolean change_zoom, change_left, change_top;
1625
1626         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1627         page = ev_link_dest_get_page (dest);
1628
1629         if (change_zoom && zoom > 1) {
1630                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1631                 ev_document_model_set_scale (view->model, zoom);
1632         }
1633
1634         left = ev_link_dest_get_left (dest, &change_left);
1635         top = ev_link_dest_get_top (dest, &change_top);
1636
1637         doc_point.x = change_left ? left : 0;
1638         doc_point.y = change_top ? top : 0;
1639         view->pending_point = doc_point;
1640
1641         ev_view_change_page (view, page);
1642 }
1643
1644 static void
1645 goto_dest (EvView *view, EvLinkDest *dest)
1646 {
1647         EvLinkDestType type;
1648         int page, n_pages, current_page;
1649
1650         page = ev_link_dest_get_page (dest);
1651         n_pages = ev_document_get_n_pages (view->document);
1652
1653         if (page < 0 || page >= n_pages)
1654                 return;
1655
1656         current_page = view->current_page;
1657
1658         type = ev_link_dest_get_dest_type (dest);
1659
1660         switch (type) {
1661                 case EV_LINK_DEST_TYPE_PAGE:
1662                         ev_document_model_set_page (view->model, page);
1663                         break;
1664                 case EV_LINK_DEST_TYPE_FIT:
1665                         goto_fit_dest (view, dest);
1666                         break;
1667                 case EV_LINK_DEST_TYPE_FITH:
1668                         goto_fith_dest (view, dest);
1669                         break;
1670                 case EV_LINK_DEST_TYPE_FITV:
1671                         goto_fitv_dest (view, dest);
1672                         break;
1673                 case EV_LINK_DEST_TYPE_FITR:
1674                         goto_fitr_dest (view, dest);
1675                         break;
1676                 case EV_LINK_DEST_TYPE_XYZ:
1677                         goto_xyz_dest (view, dest);
1678                         break;
1679                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1680                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1681                         break;
1682                 default:
1683                         g_assert_not_reached ();
1684         }
1685
1686         if (current_page != view->current_page)
1687                 ev_document_model_set_page (view->model, view->current_page);
1688 }
1689
1690 static void
1691 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1692 {
1693         EvLinkDestType type;
1694
1695         type = ev_link_dest_get_dest_type (dest);
1696
1697         if (type == EV_LINK_DEST_TYPE_NAMED) {
1698                 EvLinkDest  *dest2;
1699                 const gchar *named_dest;
1700
1701                 named_dest = ev_link_dest_get_named_dest (dest);
1702                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1703                                                           named_dest);
1704                 if (dest2) {
1705                         goto_dest (view, dest2);
1706                         g_object_unref (dest2);
1707                 }
1708
1709                 return;
1710         }
1711
1712         goto_dest (view, dest);
1713 }
1714
1715 void
1716 ev_view_handle_link (EvView *view, EvLink *link)
1717 {
1718         EvLinkAction    *action = NULL;
1719         EvLinkActionType type;
1720
1721         action = ev_link_get_action (link);
1722         if (!action)
1723                 return;
1724
1725         type = ev_link_action_get_action_type (action);
1726
1727         switch (type) {
1728                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1729                         EvLinkDest *dest;
1730
1731                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1732
1733                         dest = ev_link_action_get_dest (action);
1734                         ev_view_goto_dest (view, dest);
1735                 }
1736                         break;
1737                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1738                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1739                 case EV_LINK_ACTION_TYPE_LAUNCH:
1740                 case EV_LINK_ACTION_TYPE_NAMED:
1741                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1742                         break;
1743         }
1744 }
1745
1746 static char *
1747 tip_from_action_named (EvLinkAction *action)
1748 {
1749         const gchar *name = ev_link_action_get_name (action);
1750
1751         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1752                 return g_strdup (_("Go to first page"));
1753         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1754                 return g_strdup (_("Go to previous page"));
1755         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1756                 return g_strdup (_("Go to next page"));
1757         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1758                 return g_strdup (_("Go to last page"));
1759         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1760                 return g_strdup (_("Go to page"));
1761         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1762                 return g_strdup (_("Find"));
1763         }
1764
1765         return NULL;
1766 }
1767
1768 static char *
1769 tip_from_link (EvView *view, EvLink *link)
1770 {
1771         EvLinkAction *action;
1772         EvLinkActionType type;
1773         char *msg = NULL;
1774         char *page_label;
1775         const char *title;
1776
1777         action = ev_link_get_action (link);
1778         title = ev_link_get_title (link);
1779
1780         if (!action)
1781                 return title ? g_strdup (title) : NULL;
1782
1783         type = ev_link_action_get_action_type (action);
1784
1785         switch (type) {
1786                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1787                         page_label = ev_document_links_get_dest_page_label (EV_DOCUMENT_LINKS (view->document),
1788                                                                             ev_link_action_get_dest (action));
1789                         if (page_label) {
1790                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1791                                 g_free (page_label);
1792                         }
1793                         break;
1794                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1795                         if (title) {
1796                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1797                                                        ev_link_action_get_filename (action));
1798                         } else {
1799                                 msg = g_strdup_printf (_("Go to file “%s”"),
1800                                                        ev_link_action_get_filename (action));
1801                         }
1802                         break;
1803                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1804                         msg = g_strdup (ev_link_action_get_uri (action));
1805                         break;
1806                 case EV_LINK_ACTION_TYPE_LAUNCH:
1807                         msg = g_strdup_printf (_("Launch %s"),
1808                                                ev_link_action_get_filename (action));
1809                         break;
1810                 case EV_LINK_ACTION_TYPE_NAMED:
1811                         msg = tip_from_action_named (action);
1812                         break;
1813                 default:
1814                         if (title)
1815                                 msg = g_strdup (title);
1816                         break;
1817         }
1818
1819         return msg;
1820 }
1821
1822 static void
1823 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1824 {
1825         EvLink       *link;
1826         EvFormField  *field;
1827         EvAnnotation *annot = NULL;
1828
1829         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1830                 return;
1831
1832         if (view->drag_info.in_drag) {
1833                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1834                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1835                 return;
1836         }
1837
1838         if (view->scroll_info.autoscrolling) {
1839                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1840                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1841                 return;
1842         }
1843
1844         link = ev_view_get_link_at_location (view, x, y);
1845         if (link) {
1846                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1847         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1848                 if (field->is_read_only) {
1849                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1850                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1851                             view->cursor == EV_VIEW_CURSOR_DRAG)
1852                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1853                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1854                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1855                 } else {
1856                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1857                 }
1858         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1859                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1860         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1861                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1862         } else {
1863                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1864                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1865                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1866                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1867                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1868         }
1869
1870         if (link || annot)
1871                 g_object_set (view, "has-tooltip", TRUE, NULL);
1872 }
1873
1874 /*** Images ***/
1875 static EvImage *
1876 ev_view_get_image_at_location (EvView  *view,
1877                                gdouble  x,
1878                                gdouble  y)
1879 {
1880         gint page = -1;
1881         gint x_new = 0, y_new = 0;
1882         EvMappingList *image_mapping;
1883
1884         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1885                 return NULL;
1886
1887         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1888                 return NULL;
1889
1890         image_mapping = ev_page_cache_get_image_mapping (view->page_cache, page);
1891
1892         if (image_mapping)
1893                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1894         else
1895                 return NULL;
1896 }
1897
1898 /*** Forms ***/
1899 static EvFormField *
1900 ev_view_get_form_field_at_location (EvView  *view,
1901                                     gdouble  x,
1902                                     gdouble  y)
1903 {
1904         gint page = -1;
1905         gint x_new = 0, y_new = 0;
1906         EvMappingList *forms_mapping;
1907
1908         if (!EV_IS_DOCUMENT_FORMS (view->document))
1909                 return NULL;
1910
1911         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1912                 return NULL;
1913
1914         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache, page);
1915
1916         if (forms_mapping)
1917                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1918         else
1919                 return NULL;
1920 }
1921
1922 static cairo_region_t *
1923 ev_view_form_field_get_region (EvView      *view,
1924                                EvFormField *field)
1925 {
1926         GdkRectangle   view_area;
1927         EvMappingList *forms_mapping;
1928
1929         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
1930                                                               field->page->index);
1931         ev_view_get_area_from_mapping (view, field->page->index,
1932                                        forms_mapping,
1933                                        field, &view_area);
1934
1935         return cairo_region_create_rectangle (&view_area);
1936 }
1937
1938 static gboolean
1939 ev_view_forms_remove_widgets (EvView *view)
1940 {
1941         ev_view_remove_all (view);
1942
1943         return FALSE;
1944 }
1945
1946 static void
1947 ev_view_form_field_destroy (GtkWidget *widget,
1948                             EvView    *view)
1949 {
1950         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1951 }
1952
1953 static GtkWidget *
1954 ev_view_form_field_button_create_widget (EvView      *view,
1955                                          EvFormField *field)
1956 {
1957         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1958         cairo_region_t    *field_region = NULL;
1959
1960         switch (field_button->type) {
1961                 case EV_FORM_FIELD_BUTTON_PUSH:
1962                         return NULL;
1963                 case EV_FORM_FIELD_BUTTON_CHECK:
1964                 case EV_FORM_FIELD_BUTTON_RADIO: {
1965                         gboolean       state;
1966                         EvMappingList *forms_mapping;
1967                         GList         *l;
1968
1969                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1970                                                                                field);
1971
1972                         /* FIXME: it actually depends on NoToggleToOff flags */
1973                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1974                             state && field_button->state)
1975                                 return NULL;
1976
1977                         field_region = ev_view_form_field_get_region (view, field);
1978
1979                         /* For radio buttons and checkbox buttons that are in a set
1980                          * we need to update also the region for the current selected item
1981                          */
1982                         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
1983                                                                               field->page->index);
1984                         for (l = ev_mapping_list_get_list (forms_mapping); l; l = g_list_next (l)) {
1985                                 EvFormField *button = ((EvMapping *)(l->data))->data;
1986                                 cairo_region_t *button_region;
1987
1988                                 if (button->id == field->id)
1989                                         continue;
1990
1991                                 /* FIXME: only buttons in the same group should be updated */
1992                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1993                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1994                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1995                                         continue;
1996
1997                                 button_region = ev_view_form_field_get_region (view, button);
1998                                 cairo_region_union (field_region, button_region);
1999                                 cairo_region_destroy (button_region);
2000                         }
2001
2002                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
2003                                                                        field, !state);
2004                         field_button->state = !state;
2005                 }
2006                         break;
2007         }
2008
2009         ev_view_reload_page (view, field->page->index, field_region);
2010         cairo_region_destroy (field_region);
2011
2012         return NULL;
2013 }
2014
2015 static void
2016 ev_view_form_field_text_save (EvView    *view,
2017                               GtkWidget *widget)
2018 {
2019         EvFormField *field;
2020
2021         if (!view->document)
2022                 return;
2023
2024         field = g_object_get_data (G_OBJECT (widget), "form-field");
2025
2026         if (field->changed) {
2027                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2028                 cairo_region_t  *field_region;
2029
2030                 field_region = ev_view_form_field_get_region (view, field);
2031
2032                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
2033                                                             field, field_text->text);
2034                 field->changed = FALSE;
2035                 ev_view_reload_page (view, field->page->index, field_region);
2036                 cairo_region_destroy (field_region);
2037         }
2038 }
2039
2040 static void
2041 ev_view_form_field_text_changed (GtkWidget   *widget,
2042                                  EvFormField *field)
2043 {
2044         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2045         gchar           *text = NULL;
2046
2047         if (GTK_IS_ENTRY (widget)) {
2048                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
2049         } else if (GTK_IS_TEXT_BUFFER (widget)) {
2050                 GtkTextIter start, end;
2051
2052                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
2053                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
2054                                                  &start, &end, FALSE);
2055         }
2056
2057         if (!field_text->text ||
2058             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
2059                 g_free (field_text->text);
2060                 field_text->text = text;
2061                 field->changed = TRUE;
2062         }
2063 }
2064
2065 static GtkWidget *
2066 ev_view_form_field_text_create_widget (EvView      *view,
2067                                        EvFormField *field)
2068 {
2069         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2070         GtkWidget       *text = NULL;
2071         gchar           *txt;
2072
2073         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2074                                                           field);
2075
2076         switch (field_text->type) {
2077                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2078                         /* TODO */
2079                 case EV_FORM_FIELD_TEXT_NORMAL:
2080                         text = gtk_entry_new ();
2081                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2082                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2083                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2084
2085                         if (txt) {
2086                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2087                                 g_free (txt);
2088                         }
2089
2090                         g_signal_connect (text, "changed",
2091                                           G_CALLBACK (ev_view_form_field_text_changed),
2092                                           field);
2093                         g_signal_connect_after (text, "activate",
2094                                                 G_CALLBACK (ev_view_form_field_destroy),
2095                                                 view);
2096                         break;
2097                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2098                         GtkTextBuffer *buffer;
2099
2100                         text = gtk_text_view_new ();
2101                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2102
2103                         if (txt) {
2104                                 gtk_text_buffer_set_text (buffer, txt, -1);
2105                                 g_free (txt);
2106                         }
2107
2108                         g_signal_connect (buffer, "changed",
2109                                           G_CALLBACK (ev_view_form_field_text_changed),
2110                                           field);
2111                 }
2112                         break;
2113         }
2114
2115         g_object_weak_ref (G_OBJECT (text),
2116                            (GWeakNotify)ev_view_form_field_text_save,
2117                            view);
2118
2119         return text;
2120 }
2121
2122 static void
2123 ev_view_form_field_choice_save (EvView    *view,
2124                                 GtkWidget *widget)
2125 {
2126         EvFormField *field;
2127
2128         if (!view->document)
2129                 return;
2130
2131         field = g_object_get_data (G_OBJECT (widget), "form-field");
2132
2133         if (field->changed) {
2134                 GList             *l;
2135                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2136                 cairo_region_t    *field_region;
2137
2138                 field_region = ev_view_form_field_get_region (view, field);
2139
2140                 if (field_choice->is_editable) {
2141                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2142                                                                       field, field_choice->text);
2143                 } else {
2144                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2145                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2146                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2147                                                                                  field,
2148                                                                                  GPOINTER_TO_INT (l->data));
2149                         }
2150                 }
2151                 field->changed = FALSE;
2152                 ev_view_reload_page (view, field->page->index, field_region);
2153                 cairo_region_destroy (field_region);
2154         }
2155 }
2156
2157 static void
2158 ev_view_form_field_choice_changed (GtkWidget   *widget,
2159                                    EvFormField *field)
2160 {
2161         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2162
2163         if (GTK_IS_COMBO_BOX (widget)) {
2164                 gint item;
2165
2166                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2167                 if (!field_choice->selected_items ||
2168                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2169                         g_list_free (field_choice->selected_items);
2170                         field_choice->selected_items = NULL;
2171                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2172                                                                        GINT_TO_POINTER (item));
2173                         field->changed = TRUE;
2174                 }
2175
2176                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
2177                         gchar *text;
2178
2179                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
2180                         if (!field_choice->text ||
2181                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2182                                 g_free (field_choice->text);
2183                                 field_choice->text = text;
2184                                 field->changed = TRUE;
2185                         }
2186                 }
2187         } else if (GTK_IS_TREE_SELECTION (widget)) {
2188                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2189                 GtkTreeModel     *model;
2190                 GList            *items, *l;
2191
2192                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2193                 g_list_free (field_choice->selected_items);
2194                 field_choice->selected_items = NULL;
2195
2196                 for (l = items; l && l->data; l = g_list_next (l)) {
2197                         GtkTreeIter  iter;
2198                         GtkTreePath *path = (GtkTreePath *)l->data;
2199                         gint         item;
2200
2201                         gtk_tree_model_get_iter (model, &iter, path);
2202                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2203
2204                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2205                                                                        GINT_TO_POINTER (item));
2206
2207                         gtk_tree_path_free (path);
2208                 }
2209
2210                 g_list_free (items);
2211
2212                 field->changed = TRUE;
2213         }
2214 }
2215
2216 static GtkWidget *
2217 ev_view_form_field_choice_create_widget (EvView      *view,
2218                                          EvFormField *field)
2219 {
2220         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2221         GtkWidget         *choice;
2222         GtkTreeModel      *model;
2223         gint               n_items, i;
2224         gint               selected_item = 0;
2225
2226         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2227                                                                    field);
2228         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2229         for (i = 0; i < n_items; i++) {
2230                 GtkTreeIter iter;
2231                 gchar      *item;
2232
2233                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2234                                                                      field, i);
2235                 if (ev_document_forms_form_field_choice_is_item_selected (
2236                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2237                         selected_item = i;
2238                         /* FIXME: we need a get_selected_items function in poppler */
2239                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2240                                                                        GINT_TO_POINTER (i));
2241                 }
2242
2243                 if (item) {
2244                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2245                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2246                                             0, item,
2247                                             1, i,
2248                                             -1);
2249                         g_free (item);
2250                 }
2251         }
2252
2253         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2254                 GtkCellRenderer  *renderer;
2255                 GtkWidget        *tree_view;
2256                 GtkTreeSelection *selection;
2257
2258                 tree_view = gtk_tree_view_new_with_model (model);
2259                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2260
2261                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2262                 if (field_choice->multi_select) {
2263                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2264                 }
2265
2266                 /* TODO: set selected items */
2267
2268                 renderer = gtk_cell_renderer_text_new ();
2269                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2270                                                              0,
2271                                                              "choix", renderer,
2272                                                              "text", 0,
2273                                                              NULL);
2274
2275                 choice = gtk_scrolled_window_new (NULL, NULL);
2276                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2277                                                 GTK_POLICY_AUTOMATIC,
2278                                                 GTK_POLICY_AUTOMATIC);
2279                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2280                 gtk_widget_show (tree_view);
2281
2282                 g_signal_connect (selection, "changed",
2283                                   G_CALLBACK (ev_view_form_field_choice_changed),
2284                                   field);
2285                 g_signal_connect_after (selection, "changed",
2286                                         G_CALLBACK (ev_view_form_field_destroy),
2287                                         view);
2288         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2289                 gchar *text;
2290
2291                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2292                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2293                 if (text) {
2294                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2295                         g_free (text);
2296                 }
2297
2298                 g_signal_connect (choice, "changed",
2299                                   G_CALLBACK (ev_view_form_field_choice_changed),
2300                                   field);
2301                 g_signal_connect_after (gtk_bin_get_child (GTK_BIN (choice)),
2302                                         "activate",
2303                                         G_CALLBACK (ev_view_form_field_destroy),
2304                                         view);
2305         } else { /* ComboBoxText */
2306                 GtkCellRenderer *renderer;
2307
2308                 choice = gtk_combo_box_new_with_model (model);
2309                 renderer = gtk_cell_renderer_text_new ();
2310                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2311                                             renderer, TRUE);
2312                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2313                                                 renderer,
2314                                                 "text", 0,
2315                                                 NULL);
2316                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2317                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2318
2319                 g_signal_connect (choice, "changed",
2320                                   G_CALLBACK (ev_view_form_field_choice_changed),
2321                                   field);
2322                 g_signal_connect_after (choice, "changed",
2323                                         G_CALLBACK (ev_view_form_field_destroy),
2324                                         view);
2325         }
2326
2327         g_object_unref (model);
2328
2329         g_object_weak_ref (G_OBJECT (choice),
2330                            (GWeakNotify)ev_view_form_field_choice_save,
2331                            view);
2332
2333         return choice;
2334 }
2335
2336 static void
2337 ev_view_handle_form_field (EvView      *view,
2338                            EvFormField *field,
2339                            gdouble      x,
2340                            gdouble      y)
2341 {
2342         GtkWidget     *field_widget = NULL;
2343         EvMappingList *form_field_mapping;
2344         GdkRectangle   view_area;
2345
2346         if (field->is_read_only)
2347                 return;
2348
2349         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2350                 field_widget = ev_view_form_field_button_create_widget (view, field);
2351         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2352                 field_widget = ev_view_form_field_text_create_widget (view, field);
2353         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2354                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2355         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2356                 /* TODO */
2357         }
2358
2359         /* Form field doesn't require a widget */
2360         if (!field_widget)
2361                 return;
2362
2363         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2364                                 g_object_ref (field),
2365                                 (GDestroyNotify)g_object_unref);
2366
2367         form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2368                                                                    field->page->index);
2369         ev_view_get_area_from_mapping (view, field->page->index,
2370                                        form_field_mapping,
2371                                        field, &view_area);
2372
2373         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2374         gtk_widget_show (field_widget);
2375         gtk_widget_grab_focus (field_widget);
2376 }
2377
2378 /* Annotations */
2379 static EvViewWindowChild *
2380 ev_view_get_window_child (EvView    *view,
2381                           GtkWidget *window)
2382 {
2383         GList *children = view->window_children;
2384
2385         while (children) {
2386                 EvViewWindowChild *child;
2387
2388                 child = (EvViewWindowChild *)children->data;
2389                 children = children->next;
2390
2391                 if (child->window == window)
2392                         return child;
2393         }
2394
2395         return NULL;
2396 }
2397
2398 static void
2399 ev_view_window_child_move (EvView            *view,
2400                            EvViewWindowChild *child,
2401                            gint               x,
2402                            gint               y)
2403 {
2404         GtkAllocation allocation;
2405         gint          width, height;
2406
2407         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
2408         gtk_window_get_size (GTK_WINDOW (child->window), &width, &height);
2409
2410         child->x = x;
2411         child->y = y;
2412         gtk_window_move (GTK_WINDOW (child->window),
2413                          CLAMP (x, child->parent_x,
2414                                 child->parent_x + allocation.width - width),
2415                          CLAMP (y, child->parent_y,
2416                                 child->parent_y + allocation.height - height));
2417 }
2418
2419 static void
2420 ev_view_window_child_move_with_parent (EvView    *view,
2421                                        GtkWidget *window)
2422 {
2423         EvViewWindowChild *child;
2424         gint               root_x, root_y;
2425
2426         child = ev_view_get_window_child (view, window);
2427         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2428                                &root_x, &root_y);
2429         if (root_x != child->parent_x || root_y != child->parent_y) {
2430                 gint dest_x, dest_y;
2431
2432                 dest_x = child->x + (root_x - child->parent_x);
2433                 dest_y = child->y + (root_y - child->parent_y);
2434                 child->parent_x = root_x;
2435                 child->parent_y = root_y;
2436                 ev_view_window_child_move (view, child, dest_x, dest_y);
2437         }
2438
2439         if (child->visible && !gtk_widget_get_visible (window))
2440                 gtk_widget_show (window);
2441 }
2442
2443 static void
2444 ev_view_window_child_put (EvView    *view,
2445                           GtkWidget *window,
2446                           guint      page,
2447                           gint       x,
2448                           gint       y,
2449                           gdouble    orig_x,
2450                           gdouble    orig_y)
2451 {
2452         EvViewWindowChild *child;
2453         gint               root_x, root_y;
2454
2455         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2456                                &root_x, &root_y);
2457
2458         child = g_new0 (EvViewWindowChild, 1);
2459         child->window = window;
2460         child->page = page;
2461         child->orig_x = orig_x;
2462         child->orig_y = orig_y;
2463         child->parent_x = root_x;
2464         child->parent_y = root_y;
2465         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2466         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2467
2468         if (child->visible)
2469                 gtk_widget_show (window);
2470         else
2471                 gtk_widget_hide (window);
2472
2473         view->window_children = g_list_append (view->window_children, child);
2474 }
2475
2476 static EvViewWindowChild *
2477 ev_view_find_window_child_for_annot (EvView       *view,
2478                                      guint         page,
2479                                      EvAnnotation *annot)
2480 {
2481         GList *children = view->window_children;
2482
2483         while (children) {
2484                 EvViewWindowChild *child;
2485                 EvAnnotation      *wannot;
2486
2487                 child = (EvViewWindowChild *)children->data;
2488                 children = children->next;
2489
2490                 if (child->page != page)
2491                         continue;
2492
2493                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2494                 if (wannot == annot || strcmp (wannot->name, annot->name) == 0)
2495                         return child;
2496         }
2497
2498         return NULL;
2499 }
2500
2501 static void
2502 ev_view_window_children_free (EvView *view)
2503 {
2504         GList *l;
2505
2506         if (!view->window_children)
2507                 return;
2508
2509         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2510                 EvViewWindowChild *child;
2511
2512                 child = (EvViewWindowChild *)l->data;
2513                 gtk_widget_destroy (GTK_WIDGET (child->window));
2514                 g_free (child);
2515         }
2516         g_list_free (view->window_children);
2517         view->window_children = NULL;
2518         view->window_child_focus = NULL;
2519 }
2520
2521 static void
2522 annotation_window_grab_focus (GtkWidget *widget,
2523                               EvView    *view)
2524 {
2525         if (view->window_child_focus)
2526                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2527         view->window_child_focus = ev_view_get_window_child (view, widget);
2528 }
2529
2530 static void
2531 annotation_window_closed (EvAnnotationWindow *window,
2532                           EvView             *view)
2533 {
2534         EvViewWindowChild *child;
2535
2536         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2537         child->visible = FALSE;
2538 }
2539
2540 static void
2541 annotation_window_moved (EvAnnotationWindow *window,
2542                          gint                x,
2543                          gint                y,
2544                          EvView             *view)
2545 {
2546         EvViewWindowChild *child;
2547         GdkRectangle       page_area;
2548         GtkBorder          border;
2549         GdkRectangle       view_rect;
2550         EvRectangle        doc_rect;
2551         gint               width, height;
2552
2553         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2554         if (child->x == x && child->y == y)
2555                 return;
2556
2557         child->moved = TRUE;
2558         child->x = x;
2559         child->y = y;
2560
2561         /* Window has been moved by the user,
2562          * we have to set a new origin in doc coords
2563          */
2564         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2565         view_rect.x = (x - child->parent_x) + view->scroll_x;
2566         view_rect.y = (y - child->parent_y) + view->scroll_y;
2567         view_rect.width = width;
2568         view_rect.height = height;
2569
2570         ev_view_get_page_extents (view, child->page, &page_area, &border);
2571         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2572         child->orig_x = doc_rect.x1;
2573         child->orig_y = doc_rect.y1;
2574 }
2575
2576 static void
2577 ev_view_annotation_save (EvView       *view,
2578                          EvAnnotation *annot)
2579 {
2580         if (!view->document)
2581                 return;
2582
2583         if (!annot->changed)
2584                 return;
2585
2586         ev_document_annotations_annotation_set_contents (EV_DOCUMENT_ANNOTATIONS (view->document),
2587                                                          annot, annot->contents);
2588         annot->changed = FALSE;
2589 }
2590
2591 static void
2592 show_annotation_windows (EvView *view,
2593                          gint    page)
2594 {
2595         EvMappingList *annots;
2596         GList         *l;
2597         GtkWindow     *parent;
2598
2599         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2600
2601         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2602
2603         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2604                 EvAnnotation      *annot;
2605                 EvViewWindowChild *child;
2606                 GtkWidget         *window;
2607                 EvRectangle       *doc_rect;
2608                 GdkRectangle       view_rect;
2609
2610                 annot = ((EvMapping *)(l->data))->data;
2611
2612                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2613                         continue;
2614
2615                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2616                         continue;
2617
2618                 window = g_object_get_data (G_OBJECT (annot), "popup");
2619                 if (window) {
2620                         ev_view_window_child_move_with_parent (view, window);
2621                         continue;
2622                 }
2623
2624                 /* Look if we already have a popup for this annot */
2625                 child = ev_view_find_window_child_for_annot (view, page, annot);
2626                 window = child ? child->window : NULL;
2627                 if (window) {
2628                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2629                         g_object_set_data (G_OBJECT (annot), "popup", window);
2630                         ev_view_window_child_move_with_parent (view, window);
2631                 } else {
2632                         window = ev_annotation_window_new (annot, parent);
2633                         g_signal_connect (window, "grab_focus",
2634                                           G_CALLBACK (annotation_window_grab_focus),
2635                                           view);
2636                         g_signal_connect (window, "closed",
2637                                           G_CALLBACK (annotation_window_closed),
2638                                           view);
2639                         g_signal_connect (window, "moved",
2640                                           G_CALLBACK (annotation_window_moved),
2641                                           view);
2642                         g_object_set_data (G_OBJECT (annot), "popup", window);
2643
2644                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2645                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2646                         view_rect.x -= view->scroll_x;
2647                         view_rect.y -= view->scroll_y;
2648
2649                         ev_view_window_child_put (view, window, page,
2650                                                   view_rect.x, view_rect.y,
2651                                                   doc_rect->x1, doc_rect->y1);
2652
2653                         g_object_weak_ref (G_OBJECT (annot),
2654                                            (GWeakNotify)ev_view_annotation_save,
2655                                            view);
2656                 }
2657         }
2658 }
2659
2660 static void
2661 hide_annotation_windows (EvView *view,
2662                          gint    page)
2663 {
2664         EvMappingList *annots;
2665         GList         *l;
2666
2667         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2668
2669         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2670                 EvAnnotation *annot;
2671                 GtkWidget    *window;
2672
2673                 annot = ((EvMapping *)(l->data))->data;
2674
2675                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2676                         continue;
2677
2678                 window = g_object_get_data (G_OBJECT (annot), "popup");
2679                 if (window)
2680                         gtk_widget_hide (window);
2681         }
2682 }
2683
2684 static EvAnnotation *
2685 ev_view_get_annotation_at_location (EvView  *view,
2686                                     gdouble  x,
2687                                     gdouble  y)
2688 {
2689         gint page = -1;
2690         gint x_new = 0, y_new = 0;
2691         EvMappingList *annotations_mapping;
2692
2693         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2694                 return NULL;
2695
2696         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2697                 return NULL;
2698
2699         annotations_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
2700
2701         if (annotations_mapping)
2702                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2703         else
2704                 return NULL;
2705 }
2706
2707 static void
2708 ev_view_handle_annotation (EvView       *view,
2709                            EvAnnotation *annot,
2710                            gdouble       x,
2711                            gdouble       y,
2712                            guint32       timestamp)
2713 {
2714         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2715                 GtkWidget *window;
2716
2717                 window = g_object_get_data (G_OBJECT (annot), "popup");
2718                 if (window) {
2719                         EvViewWindowChild *child;
2720
2721                         child = ev_view_get_window_child (view, window);
2722                         if (!child->visible) {
2723                                 child->visible = TRUE;
2724                                 ev_view_window_child_move (view, child, child->x, child->y);
2725                                 gtk_widget_show (window);
2726                         }
2727                 }
2728         }
2729
2730         if (EV_IS_ANNOTATION_ATTACHMENT (annot)) {
2731                 EvAttachment *attachment = EV_ANNOTATION_ATTACHMENT (annot)->attachment;
2732
2733                 if (attachment) {
2734                         GError *error = NULL;
2735
2736                         ev_attachment_open (attachment,
2737                                             gtk_widget_get_screen (GTK_WIDGET (view)),
2738                                             timestamp,
2739                                             &error);
2740
2741                         if (error) {
2742                                 g_warning ("%s", error->message);
2743                                 g_error_free (error);
2744                         }
2745                 }
2746         }
2747 }
2748
2749 static gboolean
2750 ev_view_synctex_backward_search (EvView *view,
2751                                  gdouble x,
2752                                  gdouble y)
2753 {
2754         gint page = -1;
2755         gint x_new = 0, y_new = 0;
2756         EvSourceLink *link;
2757
2758         if (!ev_document_has_synctex (view->document))
2759                 return FALSE;
2760
2761         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2762                 return FALSE;
2763
2764         link = ev_document_synctex_backward_search (view->document, page, x_new, y_new);
2765         if (link) {
2766                 g_signal_emit (view, signals[SIGNAL_SYNC_SOURCE], 0, link);
2767                 g_free (link);
2768
2769                 return TRUE;
2770         }
2771
2772         return FALSE;
2773 }
2774
2775 /*** GtkWidget implementation ***/
2776
2777 static void
2778 ev_view_size_request_continuous_dual_page (EvView         *view,
2779                                            GtkRequisition *requisition)
2780 {
2781         gint n_pages;
2782
2783         n_pages = ev_document_get_n_pages (view->document) + 1;
2784         get_page_y_offset (view, n_pages, &requisition->height);
2785
2786         switch (view->sizing_mode) {
2787                 case EV_SIZING_FIT_WIDTH:
2788                 case EV_SIZING_BEST_FIT:
2789                         requisition->width = 1;
2790
2791                         break;
2792                 case EV_SIZING_FREE: {
2793                         gint max_width;
2794                         GtkBorder border;
2795
2796                         ev_view_get_max_page_size (view, &max_width, NULL);
2797                         compute_border (view, max_width, max_width, &border);
2798                         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2799                 }
2800                         break;
2801                 default:
2802                         g_assert_not_reached ();
2803         }
2804 }
2805
2806 static void
2807 ev_view_size_request_continuous (EvView         *view,
2808                                  GtkRequisition *requisition)
2809 {
2810         gint n_pages;
2811
2812         n_pages = ev_document_get_n_pages (view->document);
2813         get_page_y_offset (view, n_pages, &requisition->height);
2814
2815         switch (view->sizing_mode) {
2816                 case EV_SIZING_FIT_WIDTH:
2817                 case EV_SIZING_BEST_FIT:
2818                         requisition->width = 1;
2819
2820                         break;
2821                 case EV_SIZING_FREE: {
2822                         gint max_width;
2823                         GtkBorder border;
2824
2825                         ev_view_get_max_page_size (view, &max_width, NULL);
2826                         compute_border (view, max_width, max_width, &border);
2827                         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2828                 }
2829                         break;
2830                 default:
2831                         g_assert_not_reached ();
2832         }
2833 }
2834
2835 static void
2836 ev_view_size_request_dual_page (EvView         *view,
2837                                 GtkRequisition *requisition)
2838 {
2839         GtkBorder border;
2840         gint width, height;
2841
2842         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2843                 requisition->width = 1;
2844                 requisition->height = 1;
2845
2846                 return;
2847         }
2848
2849         /* Find the largest of the two. */
2850         ev_view_get_page_size (view,
2851                                view->current_page,
2852                                &width, &height);
2853         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
2854                 gint width_2, height_2;
2855                 ev_view_get_page_size (view,
2856                                        view->current_page + 1,
2857                                        &width_2, &height_2);
2858                 if (width_2 > width) {
2859                         width = width_2;
2860                         height = height_2;
2861                 }
2862         }
2863         compute_border (view, width, height, &border);
2864
2865         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
2866                 ((width + border.left + border.right) * 2) + (view->spacing * 3);
2867         requisition->height = (height + border.top + border.bottom) + (view->spacing * 2);
2868 }
2869
2870 static void
2871 ev_view_size_request_single_page (EvView         *view,
2872                                   GtkRequisition *requisition)
2873 {
2874         GtkBorder border;
2875         gint width, height;
2876
2877         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2878                 requisition->width = 1;
2879                 requisition->height = 1;
2880
2881                 return;
2882         }
2883
2884         ev_view_get_page_size (view, view->current_page, &width, &height);
2885         compute_border (view, width, height, &border);
2886
2887         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
2888                 width + border.left + border.right + (2 * view->spacing);
2889         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2890 }
2891
2892 static void
2893 ev_view_size_request (GtkWidget      *widget,
2894                       GtkRequisition *requisition)
2895 {
2896         EvView *view = EV_VIEW (widget);
2897
2898         if (view->document == NULL) {
2899                 view->requisition.width = 1;
2900                 view->requisition.height = 1;
2901
2902                 *requisition = view->requisition;
2903
2904                 return;
2905         }
2906
2907         /* Get zoom for size here when not called from
2908          * ev_view_size_allocate()
2909          */
2910         if (!view->internal_size_request &&
2911             (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2912              view->sizing_mode == EV_SIZING_BEST_FIT)) {
2913                 GtkAllocation allocation;
2914
2915                 gtk_widget_get_allocation (widget, &allocation);
2916                 ev_view_zoom_for_size (view,
2917                                        allocation.width,
2918                                        allocation.height);
2919         }
2920
2921         if (view->continuous && view->dual_page)
2922                 ev_view_size_request_continuous_dual_page (view, &view->requisition);
2923         else if (view->continuous)
2924                 ev_view_size_request_continuous (view, &view->requisition);
2925         else if (view->dual_page)
2926                 ev_view_size_request_dual_page (view, &view->requisition);
2927         else
2928                 ev_view_size_request_single_page (view, &view->requisition);
2929
2930         *requisition = view->requisition;
2931 }
2932
2933 static void
2934 ev_view_size_allocate (GtkWidget      *widget,
2935                        GtkAllocation  *allocation)
2936 {
2937         EvView *view = EV_VIEW (widget);
2938         GList  *children, *l;
2939         gint    root_x, root_y;
2940
2941         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2942
2943         if (!view->document)
2944                 return;
2945
2946         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2947             view->sizing_mode == EV_SIZING_BEST_FIT) {
2948                 GtkRequisition req;
2949
2950                 ev_view_zoom_for_size (view,
2951                                        allocation->width,
2952                                        allocation->height);
2953                 view->internal_size_request = TRUE;
2954                 ev_view_size_request (widget, &req);
2955                 view->internal_size_request = FALSE;
2956         }
2957
2958         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2959         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2960
2961         if (view->document)
2962                 view_update_range_and_current_page (view);
2963
2964         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2965         view->pending_resize = FALSE;
2966         view->pending_point.x = 0;
2967         view->pending_point.y = 0;
2968
2969         children = gtk_container_get_children (GTK_CONTAINER (widget));
2970         for (l = children; l && l->data; l = g_list_next (l)) {
2971                 EvFormField   *field;
2972                 GdkRectangle   view_area;
2973                 EvMappingList *form_field_mapping;
2974                 GtkAllocation  child_allocation;
2975                 GtkRequisition child_requisition;
2976                 GtkWidget     *child = (GtkWidget *)l->data;
2977
2978                 field = g_object_get_data (G_OBJECT (child), "form-field");
2979                 if (!field)
2980                         continue;
2981
2982                 form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2983                                                                            field->page->index);
2984                 ev_view_get_area_from_mapping (view, field->page->index,
2985                                                form_field_mapping,
2986                                                field, &view_area);
2987
2988                 gtk_widget_size_request (child, &child_requisition);
2989                 if (child_requisition.width != view_area.width ||
2990                     child_requisition.height != view_area.height)
2991                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2992
2993                 gtk_container_child_get (GTK_CONTAINER (widget),
2994                                          child,
2995                                          "x", &child_allocation.x,
2996                                          "y", &child_allocation.y,
2997                                          NULL);
2998                 if (child_allocation.x != view_area.x ||
2999                     child_allocation.y != view_area.y) {
3000                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
3001                 }
3002         }
3003         g_list_free (children);
3004
3005         if (view->window_children)
3006                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
3007                                        &root_x, &root_y);
3008
3009         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
3010                 EvViewWindowChild *child;
3011                 EvRectangle        doc_rect;
3012                 GdkRectangle       view_rect;
3013
3014                 child = (EvViewWindowChild *)l->data;
3015
3016                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
3017                 if (child->moved) {
3018                         doc_rect.x1 = child->orig_x;
3019                         doc_rect.y1 = child->orig_y;
3020                 }
3021                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
3022                 view_rect.x -= view->scroll_x;
3023                 view_rect.y -= view->scroll_y;
3024
3025                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
3026                         child->parent_x = root_x;
3027                         child->parent_y = root_y;
3028                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
3029                 }
3030         }
3031 }
3032
3033 static void
3034 ev_view_realize (GtkWidget *widget)
3035 {
3036         EvView    *view = EV_VIEW (widget);
3037         GdkWindow *bin_window;
3038         GtkStyle  *style;
3039
3040         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
3041                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
3042
3043         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3044         gdk_window_set_events (bin_window,
3045                                (gdk_window_get_events (bin_window) |
3046                                 GDK_EXPOSURE_MASK |
3047                                 GDK_BUTTON_PRESS_MASK |
3048                                 GDK_BUTTON_RELEASE_MASK |
3049                                 GDK_SCROLL_MASK |
3050                                 GDK_KEY_PRESS_MASK |
3051                                 GDK_POINTER_MOTION_MASK |
3052                                 GDK_POINTER_MOTION_HINT_MASK |
3053                                 GDK_ENTER_NOTIFY_MASK |
3054                                 GDK_LEAVE_NOTIFY_MASK));
3055
3056         style = gtk_widget_get_style (widget);
3057         gdk_window_set_background (bin_window, &style->mid[GTK_STATE_NORMAL]);
3058
3059         on_adjustment_value_changed (NULL, view);
3060 }
3061
3062 static gboolean
3063 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
3064 {
3065         EvView *view = EV_VIEW (widget);
3066         guint state;
3067
3068         state = event->state & gtk_accelerator_get_default_mod_mask ();
3069
3070         if (state == GDK_CONTROL_MASK) {
3071                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
3072                 if (event->direction == GDK_SCROLL_UP ||
3073                     event->direction == GDK_SCROLL_LEFT) {
3074                         if (ev_view_can_zoom_in (view)) {
3075                                 ev_view_zoom_in (view);
3076                         }
3077                 } else {
3078                         if (ev_view_can_zoom_out (view)) {
3079                                 ev_view_zoom_out (view);
3080                         }
3081                 }
3082
3083                 return TRUE;
3084         }
3085
3086         view->jump_to_find_result = FALSE;
3087
3088         /* Shift+Wheel scrolls the in the perpendicular direction */
3089         if (state & GDK_SHIFT_MASK) {
3090                 if (event->direction == GDK_SCROLL_UP)
3091                         event->direction = GDK_SCROLL_LEFT;
3092                 else if (event->direction == GDK_SCROLL_LEFT)
3093                         event->direction = GDK_SCROLL_UP;
3094                 else if (event->direction == GDK_SCROLL_DOWN)
3095                         event->direction = GDK_SCROLL_RIGHT;
3096                 else if (event->direction == GDK_SCROLL_RIGHT)
3097                         event->direction = GDK_SCROLL_DOWN;
3098
3099                 event->state &= ~GDK_SHIFT_MASK;
3100                 state &= ~GDK_SHIFT_MASK;
3101         }
3102
3103         if (state == 0 && view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous) {
3104                 switch (event->direction) {
3105                         case GDK_SCROLL_DOWN:
3106                         case GDK_SCROLL_RIGHT:
3107                                 ev_view_next_page (view);
3108                                 break;
3109                         case GDK_SCROLL_UP:
3110                         case GDK_SCROLL_LEFT:
3111                                 ev_view_previous_page (view);
3112                                 break;
3113                 }
3114
3115                 return TRUE;
3116         }
3117
3118         return FALSE;
3119 }
3120
3121 static EvViewSelection *
3122 find_selection_for_page (EvView *view,
3123                          gint    page)
3124 {
3125         GList *list;
3126
3127         for (list = view->selection_info.selections; list != NULL; list = list->next) {
3128                 EvViewSelection *selection;
3129
3130                 selection = (EvViewSelection *) list->data;
3131
3132                 if (selection->page == page)
3133                         return selection;
3134         }
3135
3136         return NULL;
3137 }
3138
3139 static gboolean
3140 ev_view_expose_event (GtkWidget      *widget,
3141                       GdkEventExpose *event)
3142 {
3143         EvView    *view = EV_VIEW (widget);
3144         GdkWindow *bin_window;
3145         cairo_t   *cr;
3146         gint       i;
3147
3148         if (view->loading) {
3149                 show_loading_window (view);
3150         } else if (view->loading_window &&
3151                    gtk_widget_get_visible (view->loading_window)) {
3152                 ev_view_loading_window_move (view);
3153         }
3154
3155         if (view->document == NULL)
3156                 return FALSE;
3157
3158         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3159         cr = gdk_cairo_create (bin_window);
3160
3161         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3162                 GdkRectangle page_area;
3163                 GtkBorder border;
3164                 gboolean page_ready = TRUE;
3165
3166                 if (!ev_view_get_page_extents (view, i, &page_area, &border))
3167                         continue;
3168
3169                 page_area.x -= view->scroll_x;
3170                 page_area.y -= view->scroll_y;
3171
3172                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
3173
3174                 if (page_ready && view->find_pages && view->highlight_find_results)
3175                         highlight_find_results (view, i);
3176                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3177                         show_annotation_windows (view, i);
3178                 if (page_ready && view->synctex_result)
3179                         highlight_forward_search_results (view, i);
3180         }
3181
3182         cairo_destroy (cr);
3183
3184         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3185                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3186
3187         return FALSE;
3188 }
3189
3190 static gboolean
3191 ev_view_do_popup_menu (EvView *view,
3192                        gdouble x,
3193                        gdouble y)
3194 {
3195         GList        *items = NULL;
3196         EvLink       *link;
3197         EvImage      *image;
3198         EvAnnotation *annot;
3199
3200         image = ev_view_get_image_at_location (view, x, y);
3201         if (image)
3202                 items = g_list_prepend (items, image);
3203
3204         link = ev_view_get_link_at_location (view, x, y);
3205         if (link)
3206                 items = g_list_prepend (items, link);
3207
3208         annot = ev_view_get_annotation_at_location (view, x, y);
3209         if (annot)
3210                 items = g_list_prepend (items, annot);
3211
3212         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, items);
3213
3214         g_list_free (items);
3215
3216         return TRUE;
3217 }
3218
3219 static gboolean
3220 ev_view_popup_menu (GtkWidget *widget)
3221 {
3222         gint x, y;
3223
3224         gtk_widget_get_pointer (widget, &x, &y);
3225         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3226 }
3227
3228 static void
3229 get_link_area (EvView       *view,
3230                gint          x,
3231                gint          y,
3232                EvLink       *link,
3233                GdkRectangle *area)
3234 {
3235         EvMappingList *link_mapping;
3236         gint           page;
3237         gint           x_offset = 0, y_offset = 0;
3238
3239         x += view->scroll_x;
3240         y += view->scroll_y;
3241
3242         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3243
3244         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
3245         ev_view_get_area_from_mapping (view, page,
3246                                        link_mapping,
3247                                        link, area);
3248 }
3249
3250 static void
3251 get_annot_area (EvView       *view,
3252                gint          x,
3253                gint          y,
3254                EvAnnotation *annot,
3255                GdkRectangle *area)
3256 {
3257         EvMappingList *annot_mapping;
3258         gint           page;
3259         gint           x_offset = 0, y_offset = 0;
3260
3261         x += view->scroll_x;
3262         y += view->scroll_y;
3263
3264         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3265
3266         annot_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
3267         ev_view_get_area_from_mapping (view, page,
3268                                        annot_mapping,
3269                                        annot, area);
3270 }
3271
3272 static gboolean
3273 ev_view_query_tooltip (GtkWidget  *widget,
3274                        gint        x,
3275                        gint        y,
3276                        gboolean    keyboard_tip,
3277                        GtkTooltip *tooltip)
3278 {
3279         EvView       *view = EV_VIEW (widget);
3280         EvLink       *link;
3281         EvAnnotation *annot;
3282         gchar        *text;
3283
3284         annot = ev_view_get_annotation_at_location (view, x, y);
3285         if (annot && annot->contents) {
3286                 GdkRectangle annot_area;
3287
3288                 get_annot_area (view, x, y, annot, &annot_area);
3289                 gtk_tooltip_set_text (tooltip, annot->contents);
3290                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
3291
3292                 return TRUE;
3293         }
3294
3295         link = ev_view_get_link_at_location (view, x, y);
3296         if (!link)
3297                 return FALSE;
3298
3299         text = tip_from_link (view, link);
3300         if (text && g_utf8_validate (text, -1, NULL)) {
3301                 GdkRectangle link_area;
3302
3303                 get_link_area (view, x, y, link, &link_area);
3304                 gtk_tooltip_set_text (tooltip, text);
3305                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3306         }
3307         g_free (text);
3308
3309         return TRUE;
3310 }
3311
3312 static void
3313 start_selection_for_event (EvView         *view,
3314                            GdkEventButton *event)
3315 {
3316         clear_selection (view);
3317
3318         view->selection_info.start.x = event->x + view->scroll_x;
3319         view->selection_info.start.y = event->y + view->scroll_y;
3320
3321         switch (event->type) {
3322                 case GDK_2BUTTON_PRESS:
3323                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3324                         break;
3325                 case GDK_3BUTTON_PRESS:
3326                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3327                         break;
3328                 default:
3329                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3330                         return;
3331         }
3332
3333         /* In case of WORD or LINE, compute selections now */
3334         compute_selections (view,
3335                             view->selection_info.style,
3336                             &(view->selection_info.start),
3337                             &(view->selection_info.start));
3338 }
3339
3340 static gboolean
3341 ev_view_button_press_event (GtkWidget      *widget,
3342                             GdkEventButton *event)
3343 {
3344         EvView *view = EV_VIEW (widget);
3345
3346         if (!view->document)
3347                 return FALSE;
3348
3349         if (!gtk_widget_has_focus (widget)) {
3350                 gtk_widget_grab_focus (widget);
3351         }
3352
3353         if (view->window_child_focus) {
3354                 EvAnnotationWindow *window;
3355                 EvAnnotation       *annot;
3356
3357                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3358                 annot = ev_annotation_window_get_annotation (window);
3359                 ev_annotation_window_ungrab_focus (window);
3360                 ev_view_annotation_save (view, annot);
3361                 view->window_child_focus = NULL;
3362         }
3363
3364         view->pressed_button = event->button;
3365         view->selection_info.in_drag = FALSE;
3366
3367         if (view->scroll_info.autoscrolling)
3368                 return TRUE;
3369
3370         switch (event->button) {
3371                 case 1: {
3372                         EvImage *image;
3373                         EvAnnotation *annot;
3374                         EvFormField *field;
3375
3376                         if (event->state & GDK_CONTROL_MASK)
3377                                 return ev_view_synctex_backward_search (view, event->x , event->y);
3378
3379                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3380                                 if (event->type == GDK_3BUTTON_PRESS) {
3381                                         start_selection_for_event (view, event);
3382                                 } else if (location_in_selected_text (view,
3383                                                                event->x + view->scroll_x,
3384                                                                event->y + view->scroll_y)) {
3385                                         view->selection_info.in_drag = TRUE;
3386                                 } else {
3387                                         start_selection_for_event (view, event);
3388                                 }
3389
3390                                 gtk_widget_queue_draw (widget);
3391                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3392                                 ev_view_handle_annotation (view, annot, event->x, event->y, event->time);
3393                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3394                                 ev_view_remove_all (view);
3395                                 ev_view_handle_form_field (view, field, event->x, event->y);
3396                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3397                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3398                                 if (view->image_dnd_info.image)
3399                                         g_object_unref (view->image_dnd_info.image);
3400                                 view->image_dnd_info.image = g_object_ref (image);
3401                                 view->image_dnd_info.in_drag = TRUE;
3402
3403                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3404                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3405                         } else {
3406                                 ev_view_remove_all (view);
3407
3408                                 if (view->synctex_result) {
3409                                         g_free (view->synctex_result);
3410                                         view->synctex_result = NULL;
3411                                         gtk_widget_queue_draw (widget);
3412                                 }
3413
3414                                 if (EV_IS_SELECTION (view->document))
3415                                         start_selection_for_event (view, event);
3416                         }
3417                 }
3418                         return TRUE;
3419                 case 2:
3420                         /* use root coordinates as reference point because
3421                          * scrolling changes window relative coordinates */
3422                         view->drag_info.start.x = event->x_root;
3423                         view->drag_info.start.y = event->y_root;
3424                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3425                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3426
3427                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3428
3429                         return TRUE;
3430                 case 3:
3431                         view->scroll_info.start_y = event->y;
3432                         return ev_view_do_popup_menu (view, event->x, event->y);
3433         }
3434
3435         return FALSE;
3436 }
3437
3438 static void
3439 ev_view_remove_all (EvView *view)
3440 {
3441         GList *children, *child;
3442
3443         children = gtk_container_get_children (GTK_CONTAINER (view));
3444         for (child = children; child && child->data; child = g_list_next (child)) {
3445                 gtk_container_remove (GTK_CONTAINER (view),
3446                                       GTK_WIDGET (child->data));
3447         }
3448         g_list_free (children);
3449 }
3450
3451 /*** Drag and Drop ***/
3452 static void
3453 ev_view_drag_data_get (GtkWidget        *widget,
3454                        GdkDragContext   *context,
3455                        GtkSelectionData *selection_data,
3456                        guint             info,
3457                        guint             time)
3458 {
3459         EvView *view = EV_VIEW (widget);
3460
3461         switch (info) {
3462                 case TARGET_DND_TEXT:
3463                         if (EV_IS_SELECTION (view->document) &&
3464                             view->selection_info.selections) {
3465                                 gchar *text;
3466
3467                                 text = get_selected_text (view);
3468                                 gtk_selection_data_set_text (selection_data,
3469                                                              text,
3470                                                              strlen (text));
3471                                 g_free (text);
3472                         }
3473                         break;
3474                 case TARGET_DND_IMAGE:
3475                         if (view->image_dnd_info.image) {
3476                                 GdkPixbuf *pixbuf;
3477
3478                                 ev_document_doc_mutex_lock ();
3479                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3480                                                                        view->image_dnd_info.image);
3481                                 ev_document_doc_mutex_unlock ();
3482
3483                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3484                                 g_object_unref (pixbuf);
3485                         }
3486                         break;
3487                 case TARGET_DND_URI:
3488                         if (view->image_dnd_info.image) {
3489                                 GdkPixbuf   *pixbuf;
3490                                 const gchar *tmp_uri;
3491                                 gchar       *uris[2];
3492
3493                                 ev_document_doc_mutex_lock ();
3494                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3495                                                                        view->image_dnd_info.image);
3496                                 ev_document_doc_mutex_unlock ();
3497
3498                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3499                                 g_object_unref (pixbuf);
3500
3501                                 uris[0] = (gchar *)tmp_uri;
3502                                 uris[1] = NULL;
3503                                 gtk_selection_data_set_uris (selection_data, uris);
3504                         }
3505         }
3506 }
3507
3508 static gboolean
3509 ev_view_drag_motion (GtkWidget      *widget,
3510                      GdkDragContext *context,
3511                      gint            x,
3512                      gint            y,
3513                      guint           time)
3514 {
3515         if (gtk_drag_get_source_widget (context) == widget)
3516                 gdk_drag_status (context, 0, time);
3517         else
3518                 gdk_drag_status (context, gdk_drag_context_get_suggested_action (context), time);
3519
3520         return TRUE;
3521 }
3522
3523 static gboolean
3524 selection_update_idle_cb (EvView *view)
3525 {
3526         compute_selections (view,
3527                             view->selection_info.style,
3528                             &view->selection_info.start,
3529                             &view->motion);
3530         view->selection_update_id = 0;
3531         return FALSE;
3532 }
3533
3534 static gboolean
3535 selection_scroll_timeout_cb (EvView *view)
3536 {
3537         gint x, y, shift = 0;
3538         GtkWidget *widget = GTK_WIDGET (view);
3539         GtkAllocation allocation;
3540
3541         gtk_widget_get_allocation (widget, &allocation);
3542         gtk_widget_get_pointer (widget, &x, &y);
3543
3544         if (y > allocation.height) {
3545                 shift = (y - allocation.height) / 2;
3546         } else if (y < 0) {
3547                 shift = y / 2;
3548         }
3549
3550         if (shift)
3551                 gtk_adjustment_set_value (view->vadjustment,
3552                                           CLAMP (gtk_adjustment_get_value (view->vadjustment) + shift,
3553                                                  gtk_adjustment_get_lower (view->vadjustment),
3554                                                  gtk_adjustment_get_upper (view->vadjustment) -
3555                                                  gtk_adjustment_get_page_size (view->vadjustment)));
3556
3557         if (x > allocation.width) {
3558                 shift = (x - allocation.width) / 2;
3559         } else if (x < 0) {
3560                 shift = x / 2;
3561         }
3562
3563         if (shift)
3564                 gtk_adjustment_set_value (view->hadjustment,
3565                                           CLAMP (gtk_adjustment_get_value (view->hadjustment) + shift,
3566                                                  gtk_adjustment_get_lower (view->hadjustment),
3567                                                  gtk_adjustment_get_upper (view->hadjustment) -
3568                                                  gtk_adjustment_get_page_size (view->hadjustment)));
3569
3570         return TRUE;
3571 }
3572
3573 static gboolean
3574 ev_view_drag_update_momentum (EvView *view)
3575 {
3576         int i;
3577         if (!view->drag_info.in_drag)
3578                 return FALSE;
3579
3580         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3581                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3582                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3583         }
3584
3585         /* Momentum is a moving average of 10ms granularity over
3586          * the last 100ms with each 10ms stored in buffer.
3587          */
3588
3589         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3590         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3591
3592         return TRUE;
3593 }
3594
3595 static gboolean
3596 ev_view_scroll_drag_release (EvView *view)
3597 {
3598         gdouble dhadj_value, dvadj_value;
3599         gdouble oldhadjustment, oldvadjustment;
3600         gdouble h_page_size, v_page_size;
3601         gdouble h_upper, v_upper;
3602         GtkAllocation allocation;
3603
3604         view->drag_info.momentum.x /= 1.2;
3605         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3606
3607         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
3608
3609         h_page_size = gtk_adjustment_get_page_size (view->hadjustment);
3610         v_page_size = gtk_adjustment_get_page_size (view->vadjustment);
3611
3612         dhadj_value = h_page_size *
3613                       (gdouble)view->drag_info.momentum.x / allocation.width;
3614         dvadj_value = v_page_size *
3615                       (gdouble)view->drag_info.momentum.y / allocation.height;
3616
3617         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3618         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3619
3620         h_upper = gtk_adjustment_get_upper (view->hadjustment);
3621         v_upper = gtk_adjustment_get_upper (view->vadjustment);
3622
3623         /* When we reach the edges, we need either to absorb some momentum and bounce by
3624          * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3625         if (((oldhadjustment + dhadj_value) > (h_upper - h_page_size)) ||
3626             ((oldhadjustment + dhadj_value) < 0))
3627                 view->drag_info.momentum.x = 0;
3628         if (((oldvadjustment + dvadj_value) > (v_upper - v_page_size)) ||
3629             ((oldvadjustment + dvadj_value) < 0))
3630                 view->drag_info.momentum.y = 0;
3631
3632         gtk_adjustment_set_value (view->hadjustment,
3633                                   MIN (oldhadjustment + dhadj_value,
3634                                        h_upper - h_page_size));
3635         gtk_adjustment_set_value (view->vadjustment,
3636                                   MIN (oldvadjustment + dvadj_value,
3637                                        v_upper - v_page_size));
3638
3639         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3640             ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3641                 return FALSE;
3642         else
3643                 return TRUE;
3644 }
3645
3646 static gboolean
3647 ev_view_motion_notify_event (GtkWidget      *widget,
3648                              GdkEventMotion *event)
3649 {
3650         EvView    *view = EV_VIEW (widget);
3651         GdkWindow *bin_window;
3652         gint       x, y;
3653
3654         if (!view->document)
3655                 return FALSE;
3656
3657         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3658
3659         if (event->is_hint || event->window != bin_window) {
3660             gtk_widget_get_pointer (widget, &x, &y);
3661         } else {
3662             x = event->x;
3663             y = event->y;
3664         }
3665
3666         if (view->scroll_info.autoscrolling) {
3667                 view->scroll_info.last_y = y;
3668                 return TRUE;
3669         }
3670
3671         if (view->selection_info.in_drag) {
3672                 if (gtk_drag_check_threshold (widget,
3673                                               view->selection_info.start.x,
3674                                               view->selection_info.start.y,
3675                                               x, y)) {
3676                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3677
3678                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3679
3680                         gtk_drag_begin (widget, target_list,
3681                                         GDK_ACTION_COPY,
3682                                         1, (GdkEvent *)event);
3683
3684                         view->selection_info.in_drag = FALSE;
3685
3686                         gtk_target_list_unref (target_list);
3687
3688                         return TRUE;
3689                 }
3690         } else if (view->image_dnd_info.in_drag) {
3691                 if (gtk_drag_check_threshold (widget,
3692                                               view->selection_info.start.x,
3693                                               view->selection_info.start.y,
3694                                               x, y)) {
3695                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3696
3697                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3698                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3699
3700                         gtk_drag_begin (widget, target_list,
3701                                         GDK_ACTION_COPY,
3702                                         1, (GdkEvent *)event);
3703
3704                         view->image_dnd_info.in_drag = FALSE;
3705
3706                         gtk_target_list_unref (target_list);
3707
3708                         return TRUE;
3709                 }
3710         }
3711
3712         switch (view->pressed_button) {
3713         case 1:
3714                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3715                  * documents only.
3716                  */
3717                 if (view->rotation != 0)
3718                         return FALSE;
3719
3720                 /* Schedule timeout to scroll during selection and additionally
3721                  * scroll once to allow arbitrary speed. */
3722                 if (!view->selection_scroll_id)
3723                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3724                                                                (GSourceFunc)selection_scroll_timeout_cb,
3725                                                                view);
3726                 else
3727                     selection_scroll_timeout_cb (view);
3728
3729                 view->selection_info.in_selection = TRUE;
3730                 view->motion.x = x + view->scroll_x;
3731                 view->motion.y = y + view->scroll_y;
3732
3733                 /* Queue an idle to handle the motion.  We do this because
3734                  * handling any selection events in the motion could be slower
3735                  * than new motion events reach us.  We always put it in the
3736                  * idle to make sure we catch up and don't visibly lag the
3737                  * mouse. */
3738                 if (!view->selection_update_id)
3739                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3740
3741                 return TRUE;
3742         case 2:
3743                 if (!view->drag_info.in_drag) {
3744                         gboolean start;
3745                         int i;
3746
3747                         start = gtk_drag_check_threshold (widget,
3748                                                           view->drag_info.start.x,
3749                                                           view->drag_info.start.y,
3750                                                           event->x_root,
3751                                                           event->y_root);
3752                         view->drag_info.in_drag = start;
3753                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3754                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3755                         /* Set 100 to choose how long it takes to build up momentum */
3756                         /* Clear out previous momentum info: */
3757                         for (i = 0; i < DRAG_HISTORY; i++) {
3758                                 view->drag_info.buffer[i].x = event->x;
3759                                 view->drag_info.buffer[i].y = event->y;
3760                         }
3761                         view->drag_info.momentum.x = 0;
3762                         view->drag_info.momentum.y = 0;
3763                 }
3764
3765                 if (view->drag_info.in_drag) {
3766                         int dx, dy;
3767                         gdouble dhadj_value, dvadj_value;
3768                         GtkAllocation allocation;
3769
3770                         view->drag_info.buffer[0].x = event->x;
3771                         view->drag_info.buffer[0].y = event->y;
3772
3773                         dx = event->x_root - view->drag_info.start.x;
3774                         dy = event->y_root - view->drag_info.start.y;
3775
3776                         gtk_widget_get_allocation (widget, &allocation);
3777
3778                         dhadj_value = gtk_adjustment_get_page_size (view->hadjustment) *
3779                                       (gdouble)dx / allocation.width;
3780                         dvadj_value = gtk_adjustment_get_page_size (view->vadjustment) *
3781                                       (gdouble)dy / allocation.height;
3782
3783                         /* clamp scrolling to visible area */
3784                         gtk_adjustment_set_value (view->hadjustment,
3785                                                   MIN (view->drag_info.hadj - dhadj_value,
3786                                                        gtk_adjustment_get_upper (view->hadjustment) -
3787                                                        gtk_adjustment_get_page_size (view->hadjustment)));
3788                         gtk_adjustment_set_value (view->vadjustment,
3789                                                   MIN (view->drag_info.vadj - dvadj_value,
3790                                                        gtk_adjustment_get_upper (view->vadjustment) -
3791                                                        gtk_adjustment_get_page_size (view->vadjustment)));
3792
3793                         return TRUE;
3794                 }
3795
3796                 break;
3797         default:
3798                 ev_view_handle_cursor_over_xy (view, x, y);
3799         }
3800
3801         return FALSE;
3802 }
3803
3804 static gboolean
3805 ev_view_button_release_event (GtkWidget      *widget,
3806                               GdkEventButton *event)
3807 {
3808         EvView *view = EV_VIEW (widget);
3809         EvLink *link = NULL;
3810
3811         view->image_dnd_info.in_drag = FALSE;
3812
3813         if (view->scroll_info.autoscrolling) {
3814                 ev_view_autoscroll_stop (view);
3815                 view->pressed_button = -1;
3816
3817                 return TRUE;
3818         }
3819
3820         if (view->drag_info.in_drag) {
3821                 view->drag_info.release_timeout_id =
3822                         g_timeout_add (20,
3823                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3824         }
3825
3826         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3827                 link = ev_view_get_link_at_location (view, event->x, event->y);
3828         }
3829
3830         view->drag_info.in_drag = FALSE;
3831
3832         if (view->pressed_button == 2) {
3833                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3834         }
3835
3836         view->pressed_button = -1;
3837
3838         if (view->selection_scroll_id) {
3839             g_source_remove (view->selection_scroll_id);
3840             view->selection_scroll_id = 0;
3841         }
3842         if (view->selection_update_id) {
3843             g_source_remove (view->selection_update_id);
3844             view->selection_update_id = 0;
3845         }
3846
3847         if (view->selection_info.selections) {
3848                 clear_link_selected (view);
3849                 ev_view_update_primary_selection (view);
3850
3851                 if (view->selection_info.in_drag) {
3852                         clear_selection (view);
3853                         gtk_widget_queue_draw (widget);
3854                 }
3855
3856                 view->selection_info.in_drag = FALSE;
3857         } else if (link) {
3858                 if (event->button == 2) {
3859                         EvLinkAction    *action;
3860                         EvLinkActionType type;
3861
3862                         action = ev_link_get_action (link);
3863                         if (!action)
3864                                 return FALSE;
3865
3866                         type = ev_link_action_get_action_type (action);
3867                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3868                                 g_signal_emit (view,
3869                                                signals[SIGNAL_EXTERNAL_LINK],
3870                                                0, action);
3871                         }
3872                 } else {
3873                         ev_view_handle_link (view, link);
3874                 }
3875         }
3876
3877         return FALSE;
3878 }
3879
3880 static gboolean
3881 ev_view_key_press_event (GtkWidget   *widget,
3882                          GdkEventKey *event)
3883 {
3884         EvView *view = EV_VIEW (widget);
3885
3886         if (!view->document)
3887                 return FALSE;
3888
3889         if (!gtk_widget_has_focus (widget)) {
3890                 /* Forward key events to current focused window child */
3891                 if (view->window_child_focus) {
3892                         GdkEventKey *new_event;
3893                         gboolean     handled;
3894
3895                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
3896                         g_object_unref (new_event->window);
3897                         new_event->window = gtk_widget_get_window (view->window_child_focus->window);
3898                         if (new_event->window)
3899                                 g_object_ref (new_event->window);
3900                         gtk_widget_realize (view->window_child_focus->window);
3901                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
3902                         gdk_event_free ((GdkEvent *)new_event);
3903
3904                         return handled;
3905                 }
3906
3907                 return FALSE;
3908         }
3909
3910         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3911 }
3912
3913 static gint
3914 ev_view_focus_in (GtkWidget     *widget,
3915                   GdkEventFocus *event)
3916 {
3917         if (EV_VIEW (widget)->pixbuf_cache)
3918                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3919         gtk_widget_queue_draw (widget);
3920
3921         return FALSE;
3922 }
3923
3924 static gint
3925 ev_view_focus_out (GtkWidget     *widget,
3926                    GdkEventFocus *event)
3927 {
3928         if (EV_VIEW (widget)->pixbuf_cache)
3929                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3930         gtk_widget_queue_draw (widget);
3931
3932         return FALSE;
3933 }
3934
3935 static gboolean
3936 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3937 {
3938         EvView *view = EV_VIEW (widget);
3939
3940         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
3941                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3942
3943         return FALSE;
3944 }
3945
3946 static gboolean
3947 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3948 {
3949         EvView *view = EV_VIEW (widget);
3950
3951         ev_view_handle_cursor_over_xy (view, event->x, event->y);
3952
3953         return FALSE;
3954 }
3955
3956 static void
3957 ev_view_style_set (GtkWidget *widget,
3958                    GtkStyle  *old_style)
3959 {
3960         if (EV_VIEW (widget)->pixbuf_cache)
3961                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3962
3963         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
3964 }
3965
3966 /*** Drawing ***/
3967
3968 static void
3969 draw_rubberband (EvView             *view,
3970                  GdkWindow          *window,
3971                  const GdkRectangle *rect,
3972                  gdouble             alpha)
3973 {
3974         GtkStyle *style;
3975         GdkColor *fill_color_gdk;
3976         gdouble   r, g, b;
3977         cairo_t  *cr;
3978
3979         style = gtk_widget_get_style (GTK_WIDGET (view));
3980         fill_color_gdk = gdk_color_copy (&style->base[GTK_STATE_SELECTED]);
3981         r = fill_color_gdk->red / 65535.;
3982         g = fill_color_gdk->green / 65535.;
3983         b = fill_color_gdk->blue / 65535.;
3984
3985         cr = gdk_cairo_create (window);
3986
3987         cairo_set_source_rgba (cr, r, g, b, alpha);
3988         cairo_rectangle (cr,
3989                          rect->x - view->scroll_x,
3990                          rect->y - view->scroll_y,
3991                          rect->width, rect->height);
3992         cairo_fill_preserve (cr);
3993
3994         cairo_set_line_width (cr, 0.5);
3995         cairo_set_source_rgb (cr, r, g, b);
3996         cairo_stroke (cr);
3997
3998         cairo_destroy (cr);
3999
4000         gdk_color_free (fill_color_gdk);
4001 }
4002
4003
4004 static void
4005 highlight_find_results (EvView *view, int page)
4006 {
4007         gint       i, n_results = 0;
4008         GdkWindow *bin_window;
4009
4010         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4011
4012         n_results = ev_view_find_get_n_results (view, page);
4013
4014         for (i = 0; i < n_results; i++) {
4015                 EvRectangle *rectangle;
4016                 GdkRectangle view_rectangle;
4017                 gdouble      alpha;
4018
4019                 if (i == view->find_result && page == view->current_page) {
4020                         alpha = 0.6;
4021                 } else {
4022                         alpha = 0.3;
4023                 }
4024
4025                 rectangle = ev_view_find_get_result (view, page, i);
4026                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4027                 draw_rubberband (view, bin_window, &view_rectangle, alpha);
4028         }
4029 }
4030
4031 static void
4032 highlight_forward_search_results (EvView *view, int page)
4033 {
4034         GdkWindow   *bin_window;
4035         GdkRectangle rect;
4036         cairo_t     *cr;
4037         EvMapping   *mapping = view->synctex_result;
4038
4039         if (GPOINTER_TO_INT (mapping->data) != page)
4040                 return;
4041
4042         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4043         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4044
4045         cr = gdk_cairo_create (bin_window);
4046         cairo_set_source_rgb (cr, 1., 0., 0.);
4047         cairo_rectangle (cr,
4048                          rect.x - view->scroll_x,
4049                          rect.y - view->scroll_y,
4050                          rect.width, rect.height);
4051         cairo_stroke (cr);
4052         cairo_destroy (cr);
4053 }
4054
4055 static void
4056 ev_view_loading_window_move (EvView *view)
4057 {
4058         GtkWidget       *widget = GTK_WIDGET (view);
4059         EvLoadingWindow *window = EV_LOADING_WINDOW (view->loading_window);
4060         gint             root_x, root_y;
4061         gint             window_width;
4062         GtkAllocation    allocation;
4063
4064         gtk_widget_get_allocation (widget, &allocation);
4065         gdk_window_get_origin (gtk_widget_get_window (widget), &root_x, &root_y);
4066         ev_loading_window_get_size (window, &window_width, NULL);
4067
4068         root_x += allocation.width - window_width - 10;
4069         root_y += 10;
4070
4071         ev_loading_window_move (window, root_x, root_y);
4072 }
4073
4074 static gboolean
4075 show_loading_window_cb (EvView *view)
4076 {
4077         if (!view->loading_window) {
4078                 GtkWindow *parent;
4079                 GdkScreen *screen;
4080
4081                 parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
4082                 view->loading_window = ev_loading_window_new (parent);
4083
4084                 /* Show the window off screen to get a valid size asap */
4085                 screen = gtk_widget_get_screen (GTK_WIDGET (view));
4086                 gtk_window_move (GTK_WINDOW (view->loading_window),
4087                                  gdk_screen_get_width (screen) + 1,
4088                                  gdk_screen_get_height (screen) + 1);
4089                 gtk_widget_show (view->loading_window);
4090         }
4091
4092         ev_view_loading_window_move (view);
4093
4094         gtk_widget_show (view->loading_window);
4095
4096         view->loading_timeout = 0;
4097
4098         return FALSE;
4099 }
4100
4101 static void
4102 show_loading_window (EvView *view)
4103 {
4104         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4105                 ev_view_loading_window_move (view);
4106                 return;
4107         }
4108
4109         if (!view->loading_timeout) {
4110                 view->loading_timeout =
4111                         g_timeout_add_full (G_PRIORITY_LOW,
4112                                             0.5, (GSourceFunc)show_loading_window_cb,
4113                                             view, NULL);
4114         }
4115 }
4116
4117 static void
4118 hide_loading_window (EvView *view)
4119 {
4120         if (view->loading_timeout) {
4121                 g_source_remove (view->loading_timeout);
4122                 view->loading_timeout = 0;
4123         }
4124
4125         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4126                 gtk_widget_hide (view->loading_window);
4127         }
4128 }
4129
4130 static void
4131 draw_one_page (EvView       *view,
4132                gint          page,
4133                cairo_t      *cr,
4134                GdkRectangle *page_area,
4135                GtkBorder    *border,
4136                GdkRectangle *expose_area,
4137                gboolean     *page_ready)
4138 {
4139         GdkWindow   *bin_window;
4140         GdkRectangle overlap;
4141         GdkRectangle real_page_area;
4142         gint         current_page;
4143         gboolean     inverted_colors;
4144
4145         g_assert (view->document);
4146
4147         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4148                 return;
4149
4150         /* Render the document itself */
4151         real_page_area = *page_area;
4152
4153         real_page_area.x += border->left;
4154         real_page_area.y += border->top;
4155         real_page_area.width -= (border->left + border->right);
4156         real_page_area.height -= (border->top + border->bottom);
4157         *page_ready = TRUE;
4158
4159         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4160         current_page = ev_document_model_get_page (view->model);
4161         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4162         ev_document_misc_paint_one_page (bin_window,
4163                                          GTK_WIDGET (view),
4164                                          page_area, border,
4165                                          page == current_page,
4166                                          inverted_colors);
4167
4168         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4169                 gint             width, height;
4170                 gint             page_width, page_height;
4171                 cairo_surface_t *page_surface = NULL;
4172                 gint             selection_width, selection_height;
4173                 cairo_surface_t *selection_surface = NULL;
4174
4175                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4176
4177                 if (!page_surface) {
4178                         if (page == current_page)
4179                                 show_loading_window (view);
4180
4181                         *page_ready = FALSE;
4182
4183                         return;
4184                 }
4185
4186                 if (page == current_page)
4187                         hide_loading_window (view);
4188
4189                 ev_view_get_page_size (view, page, &width, &height);
4190
4191                 page_width = cairo_image_surface_get_width (page_surface);
4192                 page_height = cairo_image_surface_get_height (page_surface);
4193
4194                 cairo_save (cr);
4195                 cairo_translate (cr, overlap.x, overlap.y);
4196
4197                 if (width != page_width || height != page_height) {
4198                         cairo_pattern_set_filter (cairo_get_source (cr),
4199                                                   CAIRO_FILTER_FAST);
4200                         cairo_scale (cr,
4201                                      (gdouble)width / page_width,
4202                                      (gdouble)height / page_height);
4203                 }
4204
4205                 cairo_surface_set_device_offset (page_surface,
4206                                                  overlap.x - real_page_area.x,
4207                                                  overlap.y - real_page_area.y);
4208                 cairo_set_source_surface (cr, page_surface, 0, 0);
4209                 cairo_paint (cr);
4210                 cairo_restore (cr);
4211
4212                 /* Get the selection pixbuf iff we have something to draw */
4213                 if (find_selection_for_page (view, page) &&
4214                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4215                         selection_surface =
4216                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4217                                                                        page,
4218                                                                        view->scale,
4219                                                                        NULL);
4220                 }
4221
4222                 if (!selection_surface) {
4223                         return;
4224                 }
4225
4226                 selection_width = cairo_image_surface_get_width (selection_surface);
4227                 selection_height = cairo_image_surface_get_height (selection_surface);
4228
4229                 cairo_save (cr);
4230                 cairo_translate (cr, overlap.x, overlap.y);
4231
4232                 if (width != selection_width || height != selection_height) {
4233                         cairo_pattern_set_filter (cairo_get_source (cr),
4234                                                   CAIRO_FILTER_FAST);
4235                         cairo_scale (cr,
4236                                      (gdouble)width / selection_width,
4237                                      (gdouble)height / selection_height);
4238                 }
4239
4240                 cairo_surface_set_device_offset (selection_surface,
4241                                                  overlap.x - real_page_area.x,
4242                                                  overlap.y - real_page_area.y);
4243
4244                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4245                 cairo_paint (cr);
4246                 cairo_restore (cr);
4247         }
4248 }
4249
4250 /*** GObject functions ***/
4251
4252 static void
4253 ev_view_finalize (GObject *object)
4254 {
4255         EvView *view = EV_VIEW (object);
4256
4257         clear_selection (view);
4258         clear_link_selected (view);
4259
4260         if (view->synctex_result) {
4261                 g_free (view->synctex_result);
4262                 view->synctex_result = NULL;
4263         }
4264
4265         if (view->image_dnd_info.image)
4266                 g_object_unref (view->image_dnd_info.image);
4267         view->image_dnd_info.image = NULL;
4268
4269         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4270 }
4271
4272 static void
4273 ev_view_destroy (GtkObject *object)
4274 {
4275         EvView *view = EV_VIEW (object);
4276
4277         if (view->model) {
4278                 g_object_unref (view->model);
4279                 view->model = NULL;
4280         }
4281
4282         if (view->pixbuf_cache) {
4283                 g_object_unref (view->pixbuf_cache);
4284                 view->pixbuf_cache = NULL;
4285         }
4286
4287         if (view->document) {
4288                 g_object_unref (view->document);
4289                 view->document = NULL;
4290         }
4291
4292         if (view->page_cache) {
4293                 g_object_unref (view->page_cache);
4294                 view->page_cache = NULL;
4295         }
4296
4297         ev_view_window_children_free (view);
4298
4299         if (view->selection_scroll_id) {
4300             g_source_remove (view->selection_scroll_id);
4301             view->selection_scroll_id = 0;
4302         }
4303
4304         if (view->selection_update_id) {
4305             g_source_remove (view->selection_update_id);
4306             view->selection_update_id = 0;
4307         }
4308
4309         if (view->scroll_info.timeout_id) {
4310             g_source_remove (view->scroll_info.timeout_id);
4311             view->scroll_info.timeout_id = 0;
4312         }
4313
4314         if (view->drag_info.drag_timeout_id) {
4315                 g_source_remove (view->drag_info.drag_timeout_id);
4316                 view->drag_info.drag_timeout_id = 0;
4317         }
4318
4319         if (view->drag_info.release_timeout_id) {
4320                 g_source_remove (view->drag_info.release_timeout_id);
4321                 view->drag_info.release_timeout_id = 0;
4322         }
4323
4324         if (view->loading_timeout) {
4325                 g_source_remove (view->loading_timeout);
4326                 view->loading_timeout = 0;
4327         }
4328
4329         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4330
4331         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4332 }
4333
4334 static AtkObject *
4335 ev_view_get_accessible (GtkWidget *widget)
4336 {
4337         static gboolean first_time = TRUE;
4338
4339         if (first_time) {
4340                 AtkObjectFactory *factory;
4341                 AtkRegistry *registry;
4342                 GType derived_type;
4343                 GType derived_atk_type;
4344
4345                 /*
4346                  * Figure out whether accessibility is enabled by looking at the
4347                  * type of the accessible object which would be created for
4348                  * the parent type of EvView.
4349                  */
4350                 derived_type = g_type_parent (EV_TYPE_VIEW);
4351
4352                 registry = atk_get_default_registry ();
4353                 factory = atk_registry_get_factory (registry,
4354                                                     derived_type);
4355                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4356                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4357                         atk_registry_set_factory_type (registry,
4358                                                        EV_TYPE_VIEW,
4359                                                        ev_view_accessible_factory_get_type ());
4360                 first_time = FALSE;
4361         }
4362         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4363 }
4364
4365 static void
4366 ev_view_class_init (EvViewClass *class)
4367 {
4368         GObjectClass *object_class = G_OBJECT_CLASS (class);
4369         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4370         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4371         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4372         GtkBindingSet *binding_set;
4373
4374         object_class->finalize = ev_view_finalize;
4375
4376         widget_class->expose_event = ev_view_expose_event;
4377         widget_class->button_press_event = ev_view_button_press_event;
4378         widget_class->motion_notify_event = ev_view_motion_notify_event;
4379         widget_class->button_release_event = ev_view_button_release_event;
4380         widget_class->key_press_event = ev_view_key_press_event;
4381         widget_class->focus_in_event = ev_view_focus_in;
4382         widget_class->focus_out_event = ev_view_focus_out;
4383         widget_class->get_accessible = ev_view_get_accessible;
4384         widget_class->size_request = ev_view_size_request;
4385         widget_class->size_allocate = ev_view_size_allocate;
4386         widget_class->realize = ev_view_realize;
4387         widget_class->scroll_event = ev_view_scroll_event;
4388         widget_class->enter_notify_event = ev_view_enter_notify_event;
4389         widget_class->leave_notify_event = ev_view_leave_notify_event;
4390         widget_class->style_set = ev_view_style_set;
4391         widget_class->drag_data_get = ev_view_drag_data_get;
4392         widget_class->drag_motion = ev_view_drag_motion;
4393         widget_class->popup_menu = ev_view_popup_menu;
4394         widget_class->query_tooltip = ev_view_query_tooltip;
4395
4396         gtk_object_class->destroy = ev_view_destroy;
4397
4398         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4399
4400         class->binding_activated = ev_view_scroll;
4401
4402         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4403                          G_TYPE_FROM_CLASS (object_class),
4404                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4405                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4406                          NULL, NULL,
4407                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4408                          G_TYPE_NONE, 2,
4409                          GTK_TYPE_SCROLL_TYPE,
4410                          G_TYPE_BOOLEAN);
4411         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4412                          G_TYPE_FROM_CLASS (object_class),
4413                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4414                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4415                          NULL, NULL,
4416                          g_cclosure_marshal_VOID__OBJECT,
4417                          G_TYPE_NONE, 1,
4418                          G_TYPE_OBJECT);
4419         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4420                          G_TYPE_FROM_CLASS (object_class),
4421                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4422                          G_STRUCT_OFFSET (EvViewClass, external_link),
4423                          NULL, NULL,
4424                          g_cclosure_marshal_VOID__OBJECT,
4425                          G_TYPE_NONE, 1,
4426                          G_TYPE_OBJECT);
4427         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4428                          G_TYPE_FROM_CLASS (object_class),
4429                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4430                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4431                          NULL, NULL,
4432                          g_cclosure_marshal_VOID__POINTER,
4433                          G_TYPE_NONE, 1,
4434                          G_TYPE_POINTER);
4435         signals[SIGNAL_SELECTION_CHANGED] = g_signal_new ("selection-changed",
4436                          G_TYPE_FROM_CLASS (object_class),
4437                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4438                          G_STRUCT_OFFSET (EvViewClass, selection_changed),
4439                          NULL, NULL,
4440                          g_cclosure_marshal_VOID__VOID,
4441                          G_TYPE_NONE, 0,
4442                          G_TYPE_NONE);
4443         signals[SIGNAL_SYNC_SOURCE] = g_signal_new ("sync-source",
4444                          G_TYPE_FROM_CLASS (object_class),
4445                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4446                          G_STRUCT_OFFSET (EvViewClass, sync_source),
4447                          NULL, NULL,
4448                          g_cclosure_marshal_VOID__POINTER,
4449                          G_TYPE_NONE, 1,
4450                          G_TYPE_POINTER);
4451
4452         binding_set = gtk_binding_set_by_class (class);
4453
4454         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4455         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4456         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4457         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4458         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4459         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4460         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4461         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4462         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4463                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4464         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4465                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4466         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4467                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4468         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4469                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4470
4471 }
4472
4473 static void
4474 ev_view_init (EvView *view)
4475 {
4476         gtk_widget_set_can_focus (GTK_WIDGET (view), TRUE);
4477
4478         view->start_page = -1;
4479         view->end_page = -1;
4480         view->spacing = 5;
4481         view->scale = 1.0;
4482         view->current_page = 0;
4483         view->pressed_button = -1;
4484         view->cursor = EV_VIEW_CURSOR_NORMAL;
4485         view->drag_info.in_drag = FALSE;
4486         view->scroll_info.autoscrolling = FALSE;
4487         view->selection_info.selections = NULL;
4488         view->selection_info.in_selection = FALSE;
4489         view->selection_info.in_drag = FALSE;
4490         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4491         view->continuous = TRUE;
4492         view->dual_page = FALSE;
4493         view->fullscreen = FALSE;
4494         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4495         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4496         view->jump_to_find_result = TRUE;
4497         view->highlight_find_results = FALSE;
4498
4499         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4500         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4501 }
4502
4503 /*** Callbacks ***/
4504
4505 static void
4506 ev_view_change_page (EvView *view,
4507                      gint    new_page)
4508 {
4509         gint x, y;
4510
4511         view->current_page = new_page;
4512         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4513
4514         hide_loading_window (view);
4515
4516         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4517         ev_view_handle_cursor_over_xy (view, x, y);
4518
4519         gtk_widget_queue_resize (GTK_WIDGET (view));
4520 }
4521
4522 static void
4523 job_finished_cb (EvPixbufCache  *pixbuf_cache,
4524                  cairo_region_t *region,
4525                  EvView         *view)
4526 {
4527         if (region) {
4528                 GdkWindow *bin_window;
4529
4530                 bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4531                 gdk_window_invalidate_region (bin_window, region, TRUE);
4532         } else {
4533                 gtk_widget_queue_draw (GTK_WIDGET (view));
4534         }
4535 }
4536
4537 static void
4538 ev_view_page_changed_cb (EvDocumentModel *model,
4539                          gint             old_page,
4540                          gint             new_page,
4541                          EvView          *view)
4542 {
4543         if (!view->document)
4544                 return;
4545
4546         if (view->current_page != new_page) {
4547                 ev_view_change_page (view, new_page);
4548         } else {
4549                 gtk_widget_queue_draw (GTK_WIDGET (view));
4550         }
4551
4552         view->find_result = 0;
4553 }
4554
4555 static void
4556 on_adjustment_value_changed (GtkAdjustment *adjustment,
4557                              EvView        *view)
4558 {
4559         int dx = 0, dy = 0;
4560         gint x, y;
4561         gint value;
4562         GList *children, *l;
4563
4564         if (!gtk_widget_get_realized (GTK_WIDGET (view)))
4565                 return;
4566
4567         if (view->hadjustment) {
4568                 value = (gint) gtk_adjustment_get_value (view->hadjustment);
4569                 dx = view->scroll_x - value;
4570                 view->scroll_x = value;
4571         } else {
4572                 view->scroll_x = 0;
4573         }
4574
4575         if (view->vadjustment) {
4576                 value = (gint) gtk_adjustment_get_value (view->vadjustment);
4577                 dy = view->scroll_y - value;
4578                 view->scroll_y = value;
4579         } else {
4580                 view->scroll_y = 0;
4581         }
4582
4583         children = gtk_container_get_children (GTK_CONTAINER (view));
4584         for (l = children; l && l->data; l = g_list_next (l)) {
4585                 gint       child_x, child_y;
4586                 GtkWidget *child = (GtkWidget *)l->data;
4587
4588                 gtk_container_child_get (GTK_CONTAINER (view),
4589                                          child,
4590                                          "x", &child_x,
4591                                          "y", &child_y,
4592                                          NULL);
4593                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4594         }
4595         g_list_free (children);
4596
4597         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4598                 EvViewWindowChild *child;
4599
4600                 child = (EvViewWindowChild *)l->data;
4601
4602                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4603         }
4604
4605         if (view->pending_resize) {
4606                 gtk_widget_queue_draw (GTK_WIDGET (view));
4607         } else {
4608                 GdkWindow *bin_window;
4609
4610                 bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4611                 gdk_window_scroll (bin_window, dx, dy);
4612         }
4613
4614         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4615         ev_view_handle_cursor_over_xy (view, x, y);
4616
4617         if (view->document)
4618                 view_update_range_and_current_page (view);
4619 }
4620
4621 GtkWidget*
4622 ev_view_new (void)
4623 {
4624         GtkWidget *view;
4625
4626         view = g_object_new (EV_TYPE_VIEW, NULL);
4627
4628         return view;
4629 }
4630
4631 static void
4632 setup_caches (EvView *view)
4633 {
4634         gboolean inverted_colors;
4635
4636         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
4637         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->model, view->pixbuf_cache_size);
4638         view->page_cache = ev_page_cache_new (view->document);
4639         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4640         ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
4641         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4642 }
4643
4644 static void
4645 clear_caches (EvView *view)
4646 {
4647         if (view->pixbuf_cache) {
4648                 g_object_unref (view->pixbuf_cache);
4649                 view->pixbuf_cache = NULL;
4650         }
4651
4652         if (view->page_cache) {
4653                 g_object_unref (view->page_cache);
4654                 view->page_cache = NULL;
4655         }
4656 }
4657
4658 /**
4659  * ev_view_set_page_cache_size:
4660  * @view:
4661  * @cache_size:
4662  *
4663  * Sets the maximum size in bytes that will be used to cache
4664  * rendered pages. Use 0 to disable caching rendered pages.
4665  *
4666  * Note that this limit doesn't affect the current visible page range,
4667  * which will always be rendered. In order to limit the total memory used
4668  * you have to use ev_document_model_set_max_scale() too.
4669  *
4670  */
4671 void
4672 ev_view_set_page_cache_size (EvView *view,
4673                              gsize   cache_size)
4674 {
4675         if (view->pixbuf_cache_size == cache_size)
4676                 return;
4677
4678         view->pixbuf_cache_size = cache_size;
4679         if (view->pixbuf_cache)
4680                 ev_pixbuf_cache_set_max_size (view->pixbuf_cache, cache_size);
4681 }
4682
4683 void
4684 ev_view_set_loading (EvView       *view,
4685                      gboolean      loading)
4686 {
4687         if (view->loading && !loading)
4688                 hide_loading_window (view);
4689         view->loading = loading;
4690         gtk_widget_queue_draw (GTK_WIDGET (view));
4691 }
4692
4693 static gboolean
4694 ev_view_autoscroll_cb (EvView *view)
4695 {
4696         gdouble speed, value;
4697
4698         /* If the user stops autoscrolling, autoscrolling will be
4699          * set to false but the timeout will continue; stop the timeout: */
4700         if (!view->scroll_info.autoscrolling) {
4701                 view->scroll_info.timeout_id = 0;
4702                 return FALSE;
4703         }
4704
4705         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4706                 (view->scroll_info.last_y < view->scroll_info.start_y))
4707                 return TRUE;
4708
4709         /* Replace 100 with your speed of choice: The lower the faster.
4710          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4711          *      based on the distance of the starting point from the mouse
4712          * (All also effected by the timeout interval of this callback) */
4713
4714         if (view->scroll_info.start_y > view->scroll_info.last_y)
4715                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
4716         else
4717                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
4718
4719         value = gtk_adjustment_get_value (view->vadjustment);
4720         value = CLAMP (value + speed, 0,
4721                        gtk_adjustment_get_upper (view->vadjustment) -
4722                        gtk_adjustment_get_page_size (view->vadjustment));
4723         gtk_adjustment_set_value (view->vadjustment, value);
4724
4725         return TRUE;
4726
4727 }
4728
4729 void
4730 ev_view_autoscroll_start (EvView *view)
4731 {
4732         gint x, y;
4733
4734         g_return_if_fail (EV_IS_VIEW (view));
4735
4736         if (view->scroll_info.autoscrolling)
4737                 return;
4738
4739         view->scroll_info.autoscrolling = TRUE;
4740         view->scroll_info.timeout_id =
4741                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
4742                                view);
4743
4744         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4745         ev_view_handle_cursor_over_xy (view, x, y);
4746 }
4747
4748 void
4749 ev_view_autoscroll_stop (EvView *view)
4750 {
4751         gint x, y;
4752
4753         g_return_if_fail (EV_IS_VIEW (view));
4754
4755         if (!view->scroll_info.autoscrolling)
4756                 return;
4757
4758         view->scroll_info.autoscrolling = FALSE;
4759         if (view->scroll_info.timeout_id) {
4760                 g_source_remove (view->scroll_info.timeout_id);
4761                 view->scroll_info.timeout_id = 0;
4762         }
4763
4764         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4765         ev_view_handle_cursor_over_xy (view, x, y);
4766 }
4767
4768 static void
4769 ev_view_document_changed_cb (EvDocumentModel *model,
4770                              GParamSpec      *pspec,
4771                              EvView          *view)
4772 {
4773         EvDocument *document = ev_document_model_get_document (model);
4774
4775         if (document != view->document) {
4776                 gint current_page;
4777
4778                 clear_caches (view);
4779
4780                 if (view->document) {
4781                         g_object_unref (view->document);
4782                 }
4783
4784                 view->document = document;
4785                 view->find_result = 0;
4786
4787                 if (view->document) {
4788                         view->loading = FALSE;
4789                         g_object_ref (view->document);
4790                         setup_caches (view);
4791                 }
4792
4793                 current_page = ev_document_model_get_page (model);
4794                 if (view->current_page != current_page) {
4795                         ev_view_change_page (view, current_page);
4796                 } else {
4797                         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4798                         gtk_widget_queue_resize (GTK_WIDGET (view));
4799                 }
4800         }
4801 }
4802
4803 static void
4804 ev_view_rotation_changed_cb (EvDocumentModel *model,
4805                              GParamSpec      *pspec,
4806                              EvView          *view)
4807 {
4808         gint rotation = ev_document_model_get_rotation (model);
4809
4810         view->rotation = rotation;
4811
4812         if (view->pixbuf_cache) {
4813                 ev_pixbuf_cache_clear (view->pixbuf_cache);
4814                 if (!ev_document_is_page_size_uniform (view->document))
4815                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4816                 gtk_widget_queue_resize (GTK_WIDGET (view));
4817         }
4818
4819         ev_view_remove_all (view);
4820
4821         if (rotation != 0)
4822                 clear_selection (view);
4823 }
4824
4825 static void
4826 ev_view_inverted_colors_changed_cb (EvDocumentModel *model,
4827                                     GParamSpec      *pspec,
4828                                     EvView          *view)
4829 {
4830         if (view->pixbuf_cache) {
4831                 gboolean inverted_colors;
4832
4833                 inverted_colors = ev_document_model_get_inverted_colors (model);
4834                 ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
4835                 gtk_widget_queue_draw (GTK_WIDGET (view));
4836         }
4837 }
4838
4839 static void
4840 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
4841                                 GParamSpec      *pspec,
4842                                 EvView          *view)
4843 {
4844         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
4845
4846         view->sizing_mode = mode;
4847         if (mode != EV_SIZING_FREE)
4848                 gtk_widget_queue_resize (GTK_WIDGET (view));
4849 }
4850
4851 #define EPSILON 0.0000001
4852 static void
4853 ev_view_scale_changed_cb (EvDocumentModel *model,
4854                           GParamSpec      *pspec,
4855                           EvView          *view)
4856 {
4857         gdouble scale = ev_document_model_get_scale (model);
4858
4859         if (ABS (view->scale - scale) < EPSILON)
4860                 return;
4861
4862         view->scale = scale;
4863
4864         view->pending_resize = TRUE;
4865         if (view->sizing_mode == EV_SIZING_FREE)
4866                 gtk_widget_queue_resize (GTK_WIDGET (view));
4867 }
4868
4869 static void
4870 ev_view_continuous_changed_cb (EvDocumentModel *model,
4871                                GParamSpec      *pspec,
4872                                EvView          *view)
4873 {
4874         gboolean continuous = ev_document_model_get_continuous (model);
4875
4876         view->continuous = continuous;
4877         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4878         gtk_widget_queue_resize (GTK_WIDGET (view));
4879 }
4880
4881 static void
4882 ev_view_dual_page_changed_cb (EvDocumentModel *model,
4883                               GParamSpec      *pspec,
4884                               EvView          *view)
4885 {
4886         gboolean dual_page = ev_document_model_get_dual_page (model);
4887
4888         view->dual_page = dual_page;
4889         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4890         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
4891          * preload_cache_size to be 2 if dual_page is set.
4892          */
4893         gtk_widget_queue_resize (GTK_WIDGET (view));
4894 }
4895
4896 static void
4897 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
4898                                GParamSpec      *pspec,
4899                                EvView          *view)
4900 {
4901         gboolean fullscreen = ev_document_model_get_fullscreen (model);
4902
4903         view->fullscreen = fullscreen;
4904         gtk_widget_queue_resize (GTK_WIDGET (view));
4905 }
4906
4907 void
4908 ev_view_set_model (EvView          *view,
4909                    EvDocumentModel *model)
4910 {
4911         g_return_if_fail (EV_IS_VIEW (view));
4912         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
4913
4914         if (model == view->model)
4915                 return;
4916
4917         if (view->model) {
4918                 g_signal_handlers_disconnect_by_func (view->model,
4919                                                       ev_view_document_changed_cb,
4920                                                       view);
4921                 g_signal_handlers_disconnect_by_func (view->model,
4922                                                       ev_view_page_changed_cb,
4923                                                       view);
4924                 g_object_unref (view->model);
4925         }
4926         view->model = g_object_ref (model);
4927
4928         /* Initialize view from model */
4929         view->rotation = ev_document_model_get_rotation (view->model);
4930         view->sizing_mode = ev_document_model_get_sizing_mode (view->model);
4931         view->scale = ev_document_model_get_scale (view->model);
4932         view->continuous = ev_document_model_get_continuous (view->model);
4933         view->dual_page = ev_document_model_get_dual_page (view->model);
4934         view->fullscreen = ev_document_model_get_fullscreen (view->model);
4935         ev_view_document_changed_cb (view->model, NULL, view);
4936
4937         g_signal_connect (view->model, "notify::document",
4938                           G_CALLBACK (ev_view_document_changed_cb),
4939                           view);
4940         g_signal_connect (view->model, "notify::rotation",
4941                           G_CALLBACK (ev_view_rotation_changed_cb),
4942                           view);
4943         g_signal_connect (view->model, "notify::inverted-colors",
4944                           G_CALLBACK (ev_view_inverted_colors_changed_cb),
4945                           view);
4946         g_signal_connect (view->model, "notify::sizing-mode",
4947                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
4948                           view);
4949         g_signal_connect (view->model, "notify::scale",
4950                           G_CALLBACK (ev_view_scale_changed_cb),
4951                           view);
4952         g_signal_connect (view->model, "notify::continuous",
4953                           G_CALLBACK (ev_view_continuous_changed_cb),
4954                           view);
4955         g_signal_connect (view->model, "notify::dual-page",
4956                           G_CALLBACK (ev_view_dual_page_changed_cb),
4957                           view);
4958         g_signal_connect (view->model, "notify::fullscreen",
4959                           G_CALLBACK (ev_view_fullscreen_changed_cb),
4960                           view);
4961         g_signal_connect (view->model, "page-changed",
4962                           G_CALLBACK (ev_view_page_changed_cb),
4963                           view);
4964 }
4965
4966 static void
4967 ev_view_reload_page (EvView         *view,
4968                      gint            page,
4969                      cairo_region_t *region)
4970 {
4971         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
4972                                      region,
4973                                      page,
4974                                      view->rotation,
4975                                      view->scale);
4976 }
4977
4978 void
4979 ev_view_reload (EvView *view)
4980 {
4981         ev_pixbuf_cache_clear (view->pixbuf_cache);
4982         view_update_range_and_current_page (view);
4983 }
4984
4985 /*** Zoom and sizing mode ***/
4986
4987 gboolean
4988 ev_view_can_zoom_in (EvView *view)
4989 {
4990         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
4991 }
4992
4993 gboolean
4994 ev_view_can_zoom_out (EvView *view)
4995 {
4996         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
4997 }
4998
4999 void
5000 ev_view_zoom_in (EvView *view)
5001 {
5002         gdouble scale;
5003
5004         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5005
5006         view->pending_scroll = SCROLL_TO_CENTER;
5007         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
5008         ev_document_model_set_scale (view->model, scale);
5009 }
5010
5011 void
5012 ev_view_zoom_out (EvView *view)
5013 {
5014         gdouble scale;
5015
5016         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5017
5018         view->pending_scroll = SCROLL_TO_CENTER;
5019         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5020         ev_document_model_set_scale (view->model, scale);
5021 }
5022
5023 static double
5024 zoom_for_size_fit_width (gdouble doc_width,
5025                          gdouble doc_height,
5026                          int     target_width,
5027                          int     target_height)
5028 {
5029         return (double)target_width / doc_width;
5030 }
5031
5032 static double
5033 zoom_for_size_fit_height (gdouble doc_width,
5034                           gdouble doc_height,
5035                           int     target_width,
5036                           int     target_height)
5037 {
5038         return (double)target_height / doc_height;
5039 }
5040
5041 static double
5042 zoom_for_size_best_fit (gdouble doc_width,
5043                         gdouble doc_height,
5044                         int     target_width,
5045                         int     target_height)
5046 {
5047         double w_scale;
5048         double h_scale;
5049
5050         w_scale = (double)target_width / doc_width;
5051         h_scale = (double)target_height / doc_height;
5052
5053         return MIN (w_scale, h_scale);
5054 }
5055
5056 static void
5057 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5058                                                 int     width,
5059                                                 int     height)
5060 {
5061         gdouble doc_width, doc_height;
5062         GtkBorder border;
5063         gdouble scale;
5064         gint sb_size;
5065
5066         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5067         if (view->rotation == 90 || view->rotation == 270) {
5068                 gdouble tmp;
5069
5070                 tmp = doc_width;
5071                 doc_width = doc_height;
5072                 doc_height = tmp;
5073         }
5074
5075         compute_border (view, doc_width, doc_height, &border);
5076
5077         doc_width *= 2;
5078         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5079         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5080
5081         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5082
5083         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5084                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5085         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5086                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5087         else
5088                 g_assert_not_reached ();
5089
5090         ev_document_model_set_scale (view->model, scale);
5091 }
5092
5093 static void
5094 ev_view_zoom_for_size_continuous (EvView *view,
5095                                   int     width,
5096                                   int     height)
5097 {
5098         gdouble doc_width, doc_height;
5099         GtkBorder border;
5100         gdouble scale;
5101         gint sb_size;
5102
5103         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5104         if (view->rotation == 90 || view->rotation == 270) {
5105                 gdouble tmp;
5106
5107                 tmp = doc_width;
5108                 doc_width = doc_height;
5109                 doc_height = tmp;
5110         }
5111
5112         compute_border (view, doc_width, doc_height, &border);
5113
5114         width -= (border.left + border.right + 2 * view->spacing);
5115         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5116
5117         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5118
5119         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5120                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5121         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5122                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5123         else
5124                 g_assert_not_reached ();
5125
5126         ev_document_model_set_scale (view->model, scale);
5127 }
5128
5129 static void
5130 ev_view_zoom_for_size_dual_page (EvView *view,
5131                                  int     width,
5132                                  int     height)
5133 {
5134         GtkBorder border;
5135         gdouble doc_width, doc_height;
5136         gdouble scale;
5137         gint other_page;
5138
5139         other_page = view->current_page ^ 1;
5140
5141         /* Find the largest of the two. */
5142         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5143         if (other_page < ev_document_get_n_pages (view->document)) {
5144                 gdouble width_2, height_2;
5145
5146                 get_doc_page_size (view, other_page, &width_2, &height_2);
5147                 if (width_2 > doc_width)
5148                         doc_width = width_2;
5149                 if (height_2 > doc_height)
5150                         doc_height = height_2;
5151         }
5152         compute_border (view, width, height, &border);
5153
5154         doc_width = doc_width * 2;
5155         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5156         height -= (border.top + border.bottom + 2 * view->spacing);
5157
5158         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5159                 gint sb_size;
5160
5161                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5162                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5163         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5164                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5165         else
5166                 g_assert_not_reached ();
5167
5168         ev_document_model_set_scale (view->model, scale);
5169 }
5170
5171 static void
5172 ev_view_zoom_for_size_single_page (EvView *view,
5173                                    int     width,
5174                                    int     height)
5175 {
5176         gdouble doc_width, doc_height;
5177         GtkBorder border;
5178         gdouble scale;
5179
5180         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5181
5182         /* Get an approximate border */
5183         compute_border (view, width, height, &border);
5184
5185         width -= (border.left + border.right + 2 * view->spacing);
5186         height -= (border.top + border.bottom + 2 * view->spacing);
5187
5188         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5189                 gint sb_size;
5190
5191                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5192                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5193         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5194                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5195         else
5196                 g_assert_not_reached ();
5197
5198         ev_document_model_set_scale (view->model, scale);
5199 }
5200
5201 static void
5202 ev_view_zoom_for_size (EvView *view,
5203                        int     width,
5204                        int     height)
5205 {
5206         g_return_if_fail (EV_IS_VIEW (view));
5207         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5208                           view->sizing_mode == EV_SIZING_BEST_FIT);
5209         g_return_if_fail (width >= 0);
5210         g_return_if_fail (height >= 0);
5211
5212         if (view->document == NULL)
5213                 return;
5214
5215         if (view->continuous && view->dual_page)
5216                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5217         else if (view->continuous)
5218                 ev_view_zoom_for_size_continuous (view, width, height);
5219         else if (view->dual_page)
5220                 ev_view_zoom_for_size_dual_page (view, width, height);
5221         else
5222                 ev_view_zoom_for_size_single_page (view, width, height);
5223 }
5224
5225 /*** Find ***/
5226 static gint
5227 ev_view_find_get_n_results (EvView *view, gint page)
5228 {
5229         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5230 }
5231
5232 static EvRectangle *
5233 ev_view_find_get_result (EvView *view, gint page, gint result)
5234 {
5235         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5236 }
5237
5238 static void
5239 jump_to_find_result (EvView *view)
5240 {
5241         gint n_results;
5242         gint page = view->current_page;
5243
5244         n_results = ev_view_find_get_n_results (view, page);
5245
5246         if (n_results > 0 && view->find_result < n_results) {
5247                 EvRectangle *rect;
5248                 GdkRectangle view_rect;
5249
5250                 rect = ev_view_find_get_result (view, page, view->find_result);
5251                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5252                 ensure_rectangle_is_visible (view, &view_rect);
5253                 view->jump_to_find_result = FALSE;
5254         }
5255 }
5256
5257 /**
5258  * jump_to_find_page
5259  * @view: #EvView instance
5260  * @direction: Direction to look
5261  * @shift: Shift from current page
5262  *
5263  * Jumps to the first page that has occurences of searched word.
5264  * Uses a direction where to look and a shift from current page.
5265  *
5266  */
5267 static void
5268 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5269 {
5270         int n_pages, i;
5271
5272         n_pages = ev_document_get_n_pages (view->document);
5273
5274         for (i = 0; i < n_pages; i++) {
5275                 int page;
5276
5277                 if (direction == EV_VIEW_FIND_NEXT)
5278                         page = view->current_page + i;
5279                 else
5280                         page = view->current_page - i;
5281                 page += shift;
5282
5283                 if (page >= n_pages) {
5284                         page = page - n_pages;
5285                 } else if (page < 0)
5286                         page = page + n_pages;
5287
5288                 if (ev_view_find_get_n_results (view, page) > 0) {
5289                         ev_document_model_set_page (view->model, page);
5290                         break;
5291                 }
5292         }
5293 }
5294
5295 void
5296 ev_view_find_changed (EvView *view, GList **results, gint page)
5297 {
5298         view->find_pages = results;
5299
5300         if (view->jump_to_find_result == TRUE) {
5301                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5302                 jump_to_find_result (view);
5303         }
5304
5305         if (view->current_page == page)
5306                 gtk_widget_queue_draw (GTK_WIDGET (view));
5307 }
5308
5309 void
5310 ev_view_find_next (EvView *view)
5311 {
5312         gint n_results;
5313
5314         n_results = ev_view_find_get_n_results (view, view->current_page);
5315         view->find_result++;
5316
5317         if (view->find_result >= n_results) {
5318                 view->find_result = 0;
5319                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5320                 jump_to_find_result (view);
5321         } else {
5322                 jump_to_find_result (view);
5323                 gtk_widget_queue_draw (GTK_WIDGET (view));
5324         }
5325 }
5326
5327 void
5328 ev_view_find_previous (EvView *view)
5329 {
5330         view->find_result--;
5331
5332         if (view->find_result < 0) {
5333                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5334                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5335                 jump_to_find_result (view);
5336         } else {
5337                 jump_to_find_result (view);
5338                 gtk_widget_queue_draw (GTK_WIDGET (view));
5339         }
5340 }
5341
5342 void
5343 ev_view_find_search_changed (EvView *view)
5344 {
5345         /* search string has changed, focus on new search result */
5346         view->jump_to_find_result = TRUE;
5347         view->find_pages = NULL;
5348 }
5349
5350 void
5351 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5352 {
5353         view->highlight_find_results = value;
5354         gtk_widget_queue_draw (GTK_WIDGET (view));
5355 }
5356
5357 void
5358 ev_view_find_cancel (EvView *view)
5359 {
5360         view->find_pages = NULL;
5361 }
5362
5363 /*** Synctex ***/
5364 void
5365 ev_view_highlight_forward_search (EvView       *view,
5366                                   EvSourceLink *link)
5367 {
5368         EvMapping   *mapping;
5369         gint         page;
5370         GdkRectangle view_rect;
5371
5372         if (!ev_document_has_synctex (view->document))
5373                 return;
5374
5375         mapping = ev_document_synctex_forward_search (view->document, link);
5376         if (!mapping)
5377                 return;
5378
5379         if (view->synctex_result)
5380                 g_free (view->synctex_result);
5381         view->synctex_result = mapping;
5382
5383         page = GPOINTER_TO_INT (mapping->data);
5384         ev_document_model_set_page (view->model, page);
5385
5386         doc_rect_to_view_rect (view, page, &mapping->area, &view_rect);
5387         ensure_rectangle_is_visible (view, &view_rect);
5388         gtk_widget_queue_draw (GTK_WIDGET (view));
5389 }
5390
5391 /*** Selections ***/
5392
5393 /* compute_new_selection_rect/text calculates the area currently selected by
5394  * view_rect.  each handles a different mode;
5395  */
5396 static GList *
5397 compute_new_selection_rect (EvView       *view,
5398                             GdkPoint     *start,
5399                             GdkPoint     *stop)
5400 {
5401         GdkRectangle view_rect;
5402         int n_pages, i;
5403         GList *list = NULL;
5404
5405         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5406
5407         view_rect.x = MIN (start->x, stop->x);
5408         view_rect.y = MIN (start->y, stop->y);
5409         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5410         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5411
5412         n_pages = ev_document_get_n_pages (view->document);
5413
5414         for (i = 0; i < n_pages; i++) {
5415                 GdkRectangle page_area;
5416                 GtkBorder border;
5417
5418                 if (ev_view_get_page_extents (view, i, &page_area, &border)) {
5419                         GdkRectangle overlap;
5420
5421                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5422                                 EvViewSelection *selection;
5423
5424                                 selection = g_new0 (EvViewSelection, 1);
5425                                 selection->page = i;
5426                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5427                                                        &(selection->rect));
5428
5429                                 list = g_list_append (list, selection);
5430                         }
5431                 }
5432         }
5433
5434         return list;
5435 }
5436
5437 static gboolean
5438 gdk_rectangle_point_in (GdkRectangle *rectangle,
5439                         GdkPoint     *point)
5440 {
5441         return rectangle->x <= point->x &&
5442                 rectangle->y <= point->y &&
5443                 point->x < rectangle->x + rectangle->width &&
5444                 point->y < rectangle->y + rectangle->height;
5445 }
5446
5447 static GList *
5448 compute_new_selection_text (EvView          *view,
5449                             EvSelectionStyle style,
5450                             GdkPoint        *start,
5451                             GdkPoint        *stop)
5452 {
5453         int n_pages, i, first, last;
5454         GList *list = NULL;
5455         EvViewSelection *selection;
5456         gdouble width, height;
5457         int start_page, end_page;
5458
5459         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5460
5461         n_pages = ev_document_get_n_pages (view->document);
5462
5463         /* First figure out the range of pages the selection
5464          * affects. */
5465         first = n_pages;
5466         last = 0;
5467         if (view->continuous) {
5468                 start_page = 0;
5469                 end_page = n_pages;
5470         } else if (view->dual_page) {
5471                 start_page = view->start_page;
5472                 end_page = view->end_page + 1;
5473         } else {
5474                 start_page = view->current_page;
5475                 end_page = view->current_page + 1;
5476         }
5477
5478         for (i = start_page; i < end_page; i++) {
5479                 GdkRectangle page_area;
5480                 GtkBorder border;
5481
5482                 ev_view_get_page_extents (view, i, &page_area, &border);
5483                 if (gdk_rectangle_point_in (&page_area, start) ||
5484                     gdk_rectangle_point_in (&page_area, stop)) {
5485                         if (first == n_pages)
5486                                 first = i;
5487                         last = i;
5488                 }
5489
5490         }
5491
5492         /* Now create a list of EvViewSelection's for the affected
5493          * pages.  This could be an empty list, a list of just one
5494          * page or a number of pages.*/
5495         for (i = first; i < last + 1; i++) {
5496                 GdkRectangle page_area;
5497                 GtkBorder border;
5498                 GdkPoint *point;
5499
5500                 get_doc_page_size (view, i, &width, &height);
5501
5502                 selection = g_new0 (EvViewSelection, 1);
5503                 selection->page = i;
5504                 selection->style = style;
5505                 selection->rect.x1 = selection->rect.y1 = 0;
5506                 selection->rect.x2 = width;
5507                 selection->rect.y2 = height;
5508
5509                 ev_view_get_page_extents (view, i, &page_area, &border);
5510
5511                 if (gdk_rectangle_point_in (&page_area, start))
5512                         point = start;
5513                 else
5514                         point = stop;
5515
5516                 if (i == first)
5517                         view_point_to_doc_point (view, point, &page_area,
5518                                                  &selection->rect.x1,
5519                                                  &selection->rect.y1);
5520
5521                 /* If the selection is contained within just one page,
5522                  * make sure we don't write 'start' into both points
5523                  * in selection->rect. */
5524                 if (first == last)
5525                         point = stop;
5526
5527                 if (i == last)
5528                         view_point_to_doc_point (view, point, &page_area,
5529                                                  &selection->rect.x2,
5530                                                  &selection->rect.y2);
5531
5532                 list = g_list_append (list, selection);
5533         }
5534
5535         return list;
5536 }
5537
5538 /* This function takes the newly calculated list, and figures out which regions
5539  * have changed.  It then queues a redraw approporiately.
5540  */
5541 static void
5542 merge_selection_region (EvView *view,
5543                         GList  *new_list)
5544 {
5545         GList *old_list;
5546         GList *new_list_ptr, *old_list_ptr;
5547
5548         /* Update the selection */
5549         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5550         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5551         g_list_free (view->selection_info.selections);
5552         view->selection_info.selections = new_list;
5553         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5554         g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
5555
5556         new_list_ptr = new_list;
5557         old_list_ptr = old_list;
5558
5559         while (new_list_ptr || old_list_ptr) {
5560                 EvViewSelection *old_sel, *new_sel;
5561                 int cur_page;
5562                 cairo_region_t *region = NULL;
5563
5564                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5565                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5566
5567                 /* Assume that the lists are in order, and we run through them
5568                  * comparing them, one page at a time.  We come out with the
5569                  * first page we see. */
5570                 if (new_sel && old_sel) {
5571                         if (new_sel->page < old_sel->page) {
5572                                 new_list_ptr = new_list_ptr->next;
5573                                 old_sel = NULL;
5574                         } else if (new_sel->page > old_sel->page) {
5575                                 old_list_ptr = old_list_ptr->next;
5576                                 new_sel = NULL;
5577                         } else {
5578                                 new_list_ptr = new_list_ptr->next;
5579                                 old_list_ptr = old_list_ptr->next;
5580                         }
5581                 } else if (new_sel) {
5582                         new_list_ptr = new_list_ptr->next;
5583                 } else if (old_sel) {
5584                         old_list_ptr = old_list_ptr->next;
5585                 }
5586
5587                 g_assert (new_sel || old_sel);
5588
5589                 /* is the page we're looking at on the screen?*/
5590                 cur_page = new_sel ? new_sel->page : old_sel->page;
5591                 if (cur_page < view->start_page || cur_page > view->end_page)
5592                         continue;
5593
5594                 /* seed the cache with a new page.  We are going to need the new
5595                  * region too. */
5596                 if (new_sel) {
5597                         cairo_region_t *tmp_region = NULL;
5598
5599                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5600                                                                cur_page,
5601                                                                view->scale,
5602                                                                &tmp_region);
5603
5604                         if (tmp_region && !cairo_region_is_empty (tmp_region)) {
5605                                 new_sel->covered_region = cairo_region_reference (tmp_region);
5606                         }
5607                 }
5608
5609                 /* Now we figure out what needs redrawing */
5610                 if (old_sel && new_sel) {
5611                         if (old_sel->covered_region && new_sel->covered_region) {
5612                                 cairo_region_t *tbr;
5613
5614                                 /* We only want to redraw the areas that have
5615                                  * changed, so we xor the old and new regions
5616                                  * and redraw if it's different */
5617                                 region = cairo_region_copy (old_sel->covered_region);
5618                                 tbr = cairo_region_copy (new_sel->covered_region);
5619
5620                                 /* xor old_sel, new_sel*/
5621                                 cairo_region_subtract (tbr, region);
5622                                 cairo_region_subtract (region, new_sel->covered_region);
5623                                 cairo_region_union (region, tbr);
5624                                 cairo_region_destroy (tbr);
5625
5626                                 if (cairo_region_is_empty (region)) {
5627                                         cairo_region_destroy (region);
5628                                         region = NULL;
5629                                 } else {
5630                                         gint num_rectangles = cairo_region_num_rectangles (region);
5631                                         GdkRectangle r;
5632
5633                                         /* We need to make the damage region a little bigger
5634                                          * because the edges of the old selection might change
5635                                          */
5636                                         cairo_region_get_rectangle (region, 0, &r);
5637                                         r.x -= 5;
5638                                         r.width = 5;
5639                                         cairo_region_union_rectangle (region, &r);
5640
5641                                         cairo_region_get_rectangle (region, num_rectangles - 1, &r);
5642                                         r.x += r.width;
5643                                         r.width = 5;
5644                                         cairo_region_union_rectangle (region, &r);
5645                                 }
5646                         } else if (old_sel->covered_region) {
5647                                 region = cairo_region_copy (old_sel->covered_region);
5648                         } else if (new_sel->covered_region) {
5649                                 region = cairo_region_copy (new_sel->covered_region);
5650                         }
5651                 } else if (old_sel && !new_sel) {
5652                         if (old_sel->covered_region && !cairo_region_is_empty (old_sel->covered_region)) {
5653                                 region = cairo_region_copy (old_sel->covered_region);
5654                         }
5655                 } else if (!old_sel && new_sel) {
5656                         if (new_sel->covered_region && !cairo_region_is_empty (new_sel->covered_region)) {
5657                                 region = cairo_region_copy (new_sel->covered_region);
5658                         }
5659                 } else {
5660                         g_assert_not_reached ();
5661                 }
5662
5663                 /* Redraw the damaged region! */
5664                 if (region) {
5665                         GdkWindow   *bin_window;
5666                         GdkRectangle page_area;
5667                         GtkBorder    border;
5668
5669                         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
5670                         ev_view_get_page_extents (view, cur_page, &page_area, &border);
5671                         cairo_region_translate (region,
5672                                            page_area.x + border.left - view->scroll_x,
5673                                            page_area.y + border.top - view->scroll_y);
5674                         gdk_window_invalidate_region (bin_window, region, TRUE);
5675                         cairo_region_destroy (region);
5676                 }
5677         }
5678
5679         /* Free the old list, now that we're done with it. */
5680         g_list_foreach (old_list, (GFunc) selection_free, NULL);
5681         g_list_free (old_list);
5682 }
5683
5684 static void
5685 compute_selections (EvView          *view,
5686                     EvSelectionStyle style,
5687                     GdkPoint        *start,
5688                     GdkPoint        *stop)
5689 {
5690         GList *list;
5691
5692         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
5693                 list = compute_new_selection_rect (view, start, stop);
5694         else
5695                 list = compute_new_selection_text (view, style, start, stop);
5696         merge_selection_region (view, list);
5697 }
5698
5699 /* Free's the selection.  It's up to the caller to queue redraws if needed.
5700  */
5701 static void
5702 selection_free (EvViewSelection *selection)
5703 {
5704         if (selection->covered_region)
5705                 cairo_region_destroy (selection->covered_region);
5706         g_free (selection);
5707 }
5708
5709 static void
5710 clear_selection (EvView *view)
5711 {
5712         if (view->selection_info.selections) {
5713                 g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5714                 g_list_free (view->selection_info.selections);
5715                 view->selection_info.selections = NULL;
5716
5717                 g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
5718         }
5719         view->selection_info.in_selection = FALSE;
5720         if (view->pixbuf_cache)
5721                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
5722 }
5723
5724 void
5725 ev_view_select_all (EvView *view)
5726 {
5727         GList *selections = NULL;
5728         int n_pages, i;
5729
5730         /* Disable selection on rotated pages for the 0.4.0 series */
5731         if (view->rotation != 0)
5732                 return;
5733
5734         clear_selection (view);
5735
5736         n_pages = ev_document_get_n_pages (view->document);
5737         for (i = 0; i < n_pages; i++) {
5738                 gdouble width, height;
5739                 EvViewSelection *selection;
5740
5741                 get_doc_page_size (view, i, &width, &height);
5742
5743                 selection = g_new0 (EvViewSelection, 1);
5744                 selection->page = i;
5745                 selection->style = EV_SELECTION_STYLE_GLYPH;
5746                 selection->rect.x1 = selection->rect.y1 = 0;
5747                 selection->rect.x2 = width;
5748                 selection->rect.y2 = height;
5749
5750                 selections = g_list_append (selections, selection);
5751         }
5752
5753         merge_selection_region (view, selections);
5754         gtk_widget_queue_draw (GTK_WIDGET (view));
5755 }
5756
5757 gboolean
5758 ev_view_get_has_selection (EvView *view)
5759 {
5760         return view->selection_info.selections != NULL;
5761 }
5762
5763 static char *
5764 get_selected_text (EvView *view)
5765 {
5766         GString *text;
5767         GList *l;
5768         gchar *normalized_text;
5769
5770         text = g_string_new (NULL);
5771
5772         ev_document_doc_mutex_lock ();
5773
5774         for (l = view->selection_info.selections; l != NULL; l = l->next) {
5775                 EvViewSelection *selection = (EvViewSelection *)l->data;
5776                 EvPage *page;
5777                 gchar *tmp;
5778
5779                 page = ev_document_get_page (view->document, selection->page);
5780                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
5781                                                       page, selection->style,
5782                                                       &(selection->rect));
5783                 g_object_unref (page);
5784                 g_string_append (text, tmp);
5785                 g_free (tmp);
5786         }
5787
5788         ev_document_doc_mutex_unlock ();
5789
5790         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
5791         g_string_free (text, TRUE);
5792         return normalized_text;
5793 }
5794
5795 static void
5796 ev_view_clipboard_copy (EvView      *view,
5797                         const gchar *text)
5798 {
5799         GtkClipboard *clipboard;
5800
5801         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
5802                                               GDK_SELECTION_CLIPBOARD);
5803         gtk_clipboard_set_text (clipboard, text, -1);
5804 }
5805
5806 void
5807 ev_view_copy (EvView *ev_view)
5808 {
5809         char *text;
5810
5811         if (!EV_IS_SELECTION (ev_view->document))
5812                 return;
5813
5814         text = get_selected_text (ev_view);
5815         ev_view_clipboard_copy (ev_view, text);
5816         g_free (text);
5817 }
5818
5819 static void
5820 ev_view_primary_get_cb (GtkClipboard     *clipboard,
5821                         GtkSelectionData *selection_data,
5822                         guint             info,
5823                         gpointer          data)
5824 {
5825         EvView *ev_view = EV_VIEW (data);
5826
5827         if (ev_view->link_selected) {
5828                 gtk_selection_data_set_text (selection_data,
5829                                              ev_link_action_get_uri (ev_view->link_selected),
5830                                              -1);
5831         } else if (EV_IS_SELECTION (ev_view->document) &&
5832                    ev_view->selection_info.selections) {
5833                 gchar *text;
5834
5835                 text = get_selected_text (ev_view);
5836                 if (text) {
5837                         gtk_selection_data_set_text (selection_data, text, -1);
5838                         g_free (text);
5839                 }
5840         }
5841 }
5842
5843 static void
5844 ev_view_primary_clear_cb (GtkClipboard *clipboard,
5845                           gpointer      data)
5846 {
5847         EvView *view = EV_VIEW (data);
5848
5849         clear_selection (view);
5850         clear_link_selected (view);
5851 }
5852
5853 static void
5854 ev_view_update_primary_selection (EvView *ev_view)
5855 {
5856         GtkClipboard *clipboard;
5857
5858         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
5859                                               GDK_SELECTION_PRIMARY);
5860
5861         if (ev_view->selection_info.selections || ev_view->link_selected) {
5862                 GtkTargetList *target_list;
5863                 GtkTargetEntry *targets;
5864                 int n_targets;
5865
5866                 target_list = gtk_target_list_new (NULL, 0);
5867                 gtk_target_list_add_text_targets (target_list, 0);
5868                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
5869                 gtk_target_list_unref (target_list);
5870
5871                 if (!gtk_clipboard_set_with_owner (clipboard,
5872                                                    targets, n_targets,
5873                                                    ev_view_primary_get_cb,
5874                                                    ev_view_primary_clear_cb,
5875                                                    G_OBJECT (ev_view)))
5876                         ev_view_primary_clear_cb (clipboard, ev_view);
5877
5878                 gtk_target_table_free (targets, n_targets);
5879         } else {
5880                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
5881                         gtk_clipboard_clear (clipboard);
5882         }
5883 }
5884
5885 static void
5886 clear_link_selected (EvView *view)
5887 {
5888         if (view->link_selected) {
5889                 g_object_unref (view->link_selected);
5890                 view->link_selected = NULL;
5891         }
5892 }
5893
5894 void
5895 ev_view_copy_link_address (EvView       *view,
5896                            EvLinkAction *action)
5897 {
5898         clear_link_selected (view);
5899
5900         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
5901
5902         view->link_selected = g_object_ref (action);
5903         ev_view_update_primary_selection (view);
5904 }
5905
5906 /*** Cursor operations ***/
5907 static void
5908 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
5909 {
5910         GdkCursor *cursor = NULL;
5911         GtkWidget *widget;
5912         GdkWindow *bin_window;
5913
5914         if (view->cursor == new_cursor) {
5915                 return;
5916         }
5917
5918         view->cursor = new_cursor;
5919
5920         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
5921         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
5922         cursor = ev_view_cursor_new (gtk_widget_get_display (widget), new_cursor);
5923         gdk_window_set_cursor (bin_window, cursor);
5924         gdk_flush ();
5925         if (cursor)
5926                 gdk_cursor_unref (cursor);
5927 }
5928
5929 void
5930 ev_view_hide_cursor (EvView *view)
5931 {
5932        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
5933 }
5934
5935 void
5936 ev_view_show_cursor (EvView *view)
5937 {
5938        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
5939 }
5940
5941 gboolean
5942 ev_view_next_page (EvView *view)
5943 {
5944         int page, n_pages;
5945
5946         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5947
5948         if (!view->document)
5949                 return FALSE;
5950
5951         page = ev_document_model_get_page (view->model);
5952         n_pages = ev_document_get_n_pages (view->document);
5953
5954         if (view->dual_page)
5955                 page = page + 2;
5956         else
5957                 page = page + 1;
5958
5959         if (page < n_pages) {
5960                 ev_document_model_set_page (view->model, page);
5961                 return TRUE;
5962         } else if (view->dual_page && page == n_pages) {
5963                 ev_document_model_set_page (view->model, page - 1);
5964                 return TRUE;
5965         } else {
5966                 return FALSE;
5967         }
5968 }
5969
5970 gboolean
5971 ev_view_previous_page (EvView *view)
5972 {
5973         int page;
5974
5975         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5976
5977         if (!view->document)
5978                 return FALSE;
5979
5980         page = ev_document_model_get_page (view->model);
5981
5982         if (view->dual_page)
5983                 page = page - 2;
5984         else
5985                 page = page - 1;
5986
5987         if (page >= 0) {
5988                 ev_document_model_set_page (view->model, page);
5989                 return TRUE;
5990         } else if (view->dual_page && page == -1) {
5991                 ev_document_model_set_page (view->model, 0);
5992                 return TRUE;
5993         } else {
5994                 return FALSE;
5995         }
5996 }
5997