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       focus_annotation                           (EvView             *view,
 182                                                               int                 page,
 183                                                               GdkRectangle       *clip);
 184 static void       draw_one_page                              (EvView             *view,
 185                                                               gint                page,
 186                                                               cairo_t            *cr,
 187                                                               GdkRectangle       *page_area,
 188                                                               GtkBorder          *border,
 189                                                               GdkRectangle       *expose_area,
 190                                                               gboolean           *page_ready);
 191 static void       show_loading_window                        (EvView             *view);
 192 static void       hide_loading_window                        (EvView             *view);
 193 static void       ev_view_reload_page                        (EvView             *view,
 194                                                               gint                page,
 195                                                               cairo_region_t     *region);
 196 static void       ev_view_loading_window_move                (EvView             *view);
 197
 198 /*** Callbacks ***/
 199 static void       ev_view_change_page                        (EvView             *view,
 200                                                               gint                new_page);
 201 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 202                                                               cairo_region_t     *region,
 203                                                               EvView             *view);
 204 static void       ev_view_page_changed_cb                    (EvDocumentModel    *model,
 205                                                               gint                old_page,
 206                                                               gint                new_page,
 207                                                               EvView             *view);
 208 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 209                                                               EvView             *view);
 210
 211 /*** GObject ***/
 212 static void       ev_view_finalize                           (GObject            *object);
 213 static void       ev_view_destroy                            (GtkObject          *object);
 214 static void       ev_view_class_init                         (EvViewClass        *class);
 215 static void       ev_view_init                               (EvView             *view);
 216
 217 /*** Zoom and sizing ***/
 218 static double   zoom_for_size_fit_width                      (gdouble doc_width,
 219                                                               gdouble doc_height,
 220                                                               int     target_width,
 221                                                               int     target_height);
 222 static double   zoom_for_size_fit_height                     (gdouble doc_width,
 223                                                               gdouble doc_height,
 224                                                               int     target_width,
 225                                                               int     target_height);
 226 static double   zoom_for_size_best_fit                       (gdouble doc_width,
 227                                                               gdouble doc_height,
 228                                                               int     target_width,
 229                                                               int     target_height);
 230 static void     ev_view_zoom_for_size                        (EvView *view,
 231                                                               int     width,
 232                                                               int     height);
 233 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 234                                                                 int     width,
 235                                                                 int     height);
 236 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 237                                                                 int     width,
 238                                                                 int     height);
 239 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 240                                                                 int     width,
 241                                                                 int     height);
 242 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 243                                                                 int     width,
 244                                                                 int     height);
 245 /*** Cursors ***/
 246 static void       ev_view_set_cursor                         (EvView             *view,
 247                                                               EvViewCursor        new_cursor);
 248 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 249                                                               gint x,
 250                                                               gint y);
 251
 252 /*** Find ***/
 253 static gint         ev_view_find_get_n_results               (EvView             *view,
 254                                                               gint                page);
 255 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 256                                                               gint                page,
 257                                                               gint                result);
 258 static void       jump_to_find_result                        (EvView             *view);
 259 static void       jump_to_find_page                          (EvView             *view,
 260                                                               EvViewFindDirection direction,
 261                                                               gint                shift);
 262 /*** Selection ***/
 263 static void       compute_selections                         (EvView             *view,
 264                                                               EvSelectionStyle    style,
 265                                                               GdkPoint           *start,
 266                                                               GdkPoint           *stop);
 267 static void       clear_selection                            (EvView             *view);
 268 static void       clear_link_selected                        (EvView             *view);
 269 static void       selection_free                             (EvViewSelection    *selection);
 270 static char*      get_selected_text                          (EvView             *ev_view);
 271 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 272                                                               GtkSelectionData   *selection_data,
 273                                                               guint               info,
 274                                                               gpointer            data);
 275 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 276                                                               gpointer            data);
 277 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 278
 279 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 280
 281 /* HeightToPage cache */
 282 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 283
 284 static void
 285 build_height_to_page (EvHeightToPageCache *cache,
 286                       EvDocument          *document,
 287                       gint                 rotation)
 288 {
 289         gboolean swap, uniform, dual_even_left;
 290         int i;
 291         double uniform_height, page_height, next_page_height;
 292         double saved_height;
 293         gdouble u_width, u_height;
 294         gint n_pages;
 295
 296         swap = (rotation == 90 || rotation == 270);
 297
 298         uniform = ev_document_is_page_size_uniform (document);
 299         n_pages = ev_document_get_n_pages (document);
 300         dual_even_left = (n_pages > 2);
 301
 302         g_free (cache->height_to_page);
 303         g_free (cache->dual_height_to_page);
 304
 305         cache->rotation = rotation;
 306         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 307         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 308
 309         if (uniform)
 310                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 311
 312         saved_height = 0;
 313         for (i = 0; i <= n_pages; i++) {
 314                 if (uniform) {
 315                         uniform_height = swap ? u_width : u_height;
 316                         cache->height_to_page[i] = i * uniform_height;
 317                 } else {
 318                         if (i < n_pages) {
 319                                 gdouble w, h;
 320
 321                                 ev_document_get_page_size (document, i, &w, &h);
 322                                 page_height = swap ? w : h;
 323                         } else {
 324                                 page_height = 0;
 325                         }
 326                         cache->height_to_page[i] = saved_height;
 327                         saved_height += page_height;
 328                 }
 329         }
 330
 331         if (dual_even_left && !uniform) {
 332                 gdouble w, h;
 333
 334                 ev_document_get_page_size (document, 0, &w, &h);
 335                 saved_height = swap ? w : h;
 336         } else {
 337                 saved_height = 0;
 338         }
 339
 340         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 341                 if (uniform) {
 342                         uniform_height = swap ? u_width : u_height;
 343                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 344                         if (i + 1 < n_pages + 2)
 345                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 346                 } else {
 347                         if (i + 1 < n_pages) {
 348                                 gdouble w, h;
 349
 350                                 ev_document_get_page_size (document, i + 1, &w, &h);
 351                                 next_page_height = swap ? w : h;
 352                         } else {
 353                                 next_page_height = 0;
 354                         }
 355
 356                         if (i < n_pages) {
 357                                 gdouble w, h;
 358
 359                                 ev_document_get_page_size (document, i, &w, &h);
 360                                 page_height = swap ? w : h;
 361                         } else {
 362                                 page_height = 0;
 363                         }
 364
 365                         if (i + 1 < n_pages + 2) {
 366                                 cache->dual_height_to_page[i] = saved_height;
 367                                 cache->dual_height_to_page[i + 1] = saved_height;
 368                                 saved_height += MAX(page_height, next_page_height);
 369                         } else {
 370                                 cache->dual_height_to_page[i] = saved_height;
 371                         }
 372                 }
 373         }
 374 }
 375
 376 static void
 377 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 378                                     EvDocument          *document,
 379                                     gint                 page,
 380                                     gint                 rotation,
 381                                     gdouble             *height,
 382                                     gdouble             *dual_height)
 383 {
 384         if (cache->rotation != rotation)
 385                 build_height_to_page (cache, document, rotation);
 386
 387         *height = cache->height_to_page[page];
 388         *dual_height = cache->dual_height_to_page[page];
 389 }
 390
 391 static void
 392 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 393 {
 394         if (cache->height_to_page) {
 395                 g_free (cache->height_to_page);
 396                 cache->height_to_page = NULL;
 397         }
 398
 399         if (cache->dual_height_to_page) {
 400                 g_free (cache->dual_height_to_page);
 401                 cache->dual_height_to_page = NULL;
 402         }
 403         g_free (cache);
 404 }
 405
 406 static EvHeightToPageCache *
 407 ev_view_get_height_to_page_cache (EvView *view)
 408 {
 409         EvHeightToPageCache *cache;
 410
 411         if (!view->document)
 412                 return NULL;
 413
 414         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 415         if (!cache) {
 416                 cache = g_new0 (EvHeightToPageCache, 1);
 417                 build_height_to_page (cache, view->document, view->rotation);
 418                 g_object_set_data_full (G_OBJECT (view->document),
 419                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 420                                         cache,
 421                                         (GDestroyNotify)ev_height_to_page_cache_free);
 422         }
 423
 424         return cache;
 425 }
 426
 427 static void
 428 ev_view_get_height_to_page (EvView *view,
 429                             gint    page,
 430                             gint   *height,
 431                             gint   *dual_height)
 432 {
 433         gdouble h, dh;
 434
 435         if (!view->height_to_page_cache)
 436                 return;
 437
 438         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 439                                             view->document,
 440                                             page,
 441                                             view->rotation,
 442                                             &h, &dh);
 443         if (height)
 444                 *height = (gint)(h * view->scale + 0.5);
 445
 446         if (dual_height)
 447                 *dual_height = (gint)(dh * view->scale + 0.5);
 448 }
 449
 450 static gint
 451 ev_view_get_scrollbar_size (EvView        *view,
 452                             GtkOrientation orientation)
 453 {
 454         GtkWidget *widget = GTK_WIDGET (view);
 455         GtkWidget *sb;
 456         GtkWidget *swindow = gtk_widget_get_parent (GTK_WIDGET (view));
 457         GtkAllocation allocation;
 458         GtkRequisition req;
 459         gint spacing;
 460
 461         if (!GTK_IS_SCROLLED_WINDOW (swindow))
 462                 return 0;
 463
 464         gtk_widget_get_allocation (widget, &allocation);
 465
 466         if (orientation == GTK_ORIENTATION_VERTICAL) {
 467                 if (allocation.height >= view->requisition.height)
 468                         sb = gtk_scrolled_window_get_vscrollbar (GTK_SCROLLED_WINDOW (swindow));
 469                 else
 470                         return 0;
 471         } else {
 472                 if (allocation.width >= view->requisition.width)
 473                         sb = gtk_scrolled_window_get_hscrollbar (GTK_SCROLLED_WINDOW (swindow));
 474                 else
 475                         return 0;
 476         }
 477
 478         gtk_widget_style_get (swindow, "scrollbar_spacing", &spacing, NULL);
 479         gtk_widget_size_request (sb, &req);
 480
 481         return (orientation == GTK_ORIENTATION_VERTICAL ? req.width : req.height) + spacing;
 482 }
 483
 484 static void
 485 scroll_to_point (EvView        *view,
 486                  gdouble        x,
 487                  gdouble        y,
 488                  GtkOrientation orientation)
 489 {
 490         gdouble page_size;
 491         gdouble upper, lower;
 492
 493         if (orientation == GTK_ORIENTATION_VERTICAL) {
 494                 page_size = gtk_adjustment_get_page_size (view->vadjustment);
 495                 upper = gtk_adjustment_get_upper (view->vadjustment);
 496                 lower = gtk_adjustment_get_lower (view->vadjustment);
 497
 498                 if (view->continuous) {
 499                         gtk_adjustment_clamp_page (view->vadjustment,
 500                                                    y - view->spacing / 2,
 501                                                    y + page_size);
 502                 } else {
 503                         gtk_adjustment_set_value (view->vadjustment,
 504                                                   CLAMP (y, lower, upper - page_size));
 505                 }
 506         } else {
 507                 page_size = gtk_adjustment_get_page_size (view->hadjustment);
 508                 upper = gtk_adjustment_get_upper (view->hadjustment);
 509                 lower = gtk_adjustment_get_lower (view->hadjustment);
 510
 511                 if (view->dual_page) {
 512                         gtk_adjustment_clamp_page (view->hadjustment, x,
 513                                                    x + page_size);
 514                 } else {
 515                         gtk_adjustment_set_value (view->hadjustment,
 516                                                   CLAMP (x, lower, upper - page_size));
 517                 }
 518         }
 519 }
 520
 521 static void
 522 ev_view_scroll_to_page_position (EvView *view, GtkOrientation orientation)
 523 {
 524         gdouble x, y;
 525
 526         if (!view->document)
 527                 return;
 528
 529         if ((orientation == GTK_ORIENTATION_VERTICAL && view->pending_point.y == 0) ||
 530             (orientation == GTK_ORIENTATION_HORIZONTAL && view->pending_point.x == 0)) {
 531                 GdkRectangle page_area;
 532                 GtkBorder    border;
 533
 534                 ev_view_get_page_extents (view, view->current_page, &page_area, &border);
 535                 x = page_area.x;
 536                 y = page_area.y;
 537         } else {
 538                 GdkPoint view_point;
 539
 540                 doc_point_to_view_point (view, view->current_page,
 541                                          &view->pending_point, &view_point);
 542                 x = view_point.x;
 543                 y = view_point.y;
 544         }
 545
 546         scroll_to_point (view, x, y, orientation);
 547 }
 548
 549 static void
 550 view_set_adjustment_values (EvView         *view,
 551                             GtkOrientation  orientation)
 552 {
 553         GtkWidget *widget = GTK_WIDGET (view);
 554         GtkAdjustment *adjustment;
 555         GtkAllocation allocation;
 556         int req_size;
 557         int alloc_size;
 558         gdouble page_size;
 559         gdouble value;
 560         gdouble upper;
 561         double factor;
 562         gint new_value;
 563
 564         gtk_widget_get_allocation (widget, &allocation);
 565
 566         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 567                 req_size = view->requisition.width;
 568                 alloc_size = allocation.width;
 569                 adjustment = view->hadjustment;
 570         } else {
 571                 req_size = view->requisition.height;
 572                 alloc_size = allocation.height;
 573                 adjustment = view->vadjustment;
 574         }
 575
 576         if (!adjustment)
 577                 return;
 578
 579         factor = 1.0;
 580         value = gtk_adjustment_get_value (adjustment);
 581         upper = gtk_adjustment_get_upper (adjustment);
 582         page_size = gtk_adjustment_get_page_size (adjustment);
 583
 584         switch (view->pending_scroll) {
 585                 case SCROLL_TO_KEEP_POSITION:
 586                 case SCROLL_TO_FIND_LOCATION:
 587                         factor = value / upper;
 588                         break;
 589                 case SCROLL_TO_PAGE_POSITION:
 590                         break;
 591                 case SCROLL_TO_CENTER:
 592                         factor = (value + page_size * 0.5) / upper;
 593                         break;
 594         }
 595
 596         upper = MAX (alloc_size, req_size);
 597         page_size = alloc_size;
 598
 599         gtk_adjustment_set_page_size (adjustment, page_size);
 600         gtk_adjustment_set_step_increment (adjustment, alloc_size * 0.1);
 601         gtk_adjustment_set_page_increment (adjustment, alloc_size * 0.9);
 602         gtk_adjustment_set_lower (adjustment, 0);
 603         gtk_adjustment_set_upper (adjustment, upper);
 604
 605         /*
 606          * We add 0.5 to the values before to average out our rounding errors.
 607          */
 608         switch (view->pending_scroll) {
 609                 case SCROLL_TO_KEEP_POSITION:
 610                 case SCROLL_TO_FIND_LOCATION:
 611                         new_value = CLAMP (upper * factor + 0.5, 0, upper - page_size);
 612                         gtk_adjustment_set_value (adjustment, (int)new_value);
 613                         break;
 614                 case SCROLL_TO_PAGE_POSITION:
 615                         ev_view_scroll_to_page_position (view, orientation);
 616                         break;
 617                 case SCROLL_TO_CENTER:
 618                         new_value = CLAMP (upper * factor - page_size * 0.5 + 0.5,
 619                                            0, upper - page_size);
 620                         gtk_adjustment_set_value (adjustment, (int)new_value);
 621                         break;
 622         }
 623
 624         gtk_adjustment_changed (adjustment);
 625 }
 626
 627 static void
 628 view_update_range_and_current_page (EvView *view)
 629 {
 630         gint start = view->start_page;
 631         gint end = view->end_page;
 632
 633         if (ev_document_get_n_pages (view->document) <= 0 ||
 634             !ev_document_check_dimensions (view->document))
 635                 return;
 636
 637         if (view->continuous) {
 638                 GdkRectangle current_area, unused, page_area;
 639                 GtkBorder border;
 640                 gboolean found = FALSE;
 641                 gint area_max = -1, area;
 642                 gint best_current_page = -1;
 643                 int i, j = 0;
 644
 645                 if (!(view->vadjustment && view->hadjustment))
 646                         return;
 647
 648                 current_area.x = gtk_adjustment_get_value (view->hadjustment);
 649                 current_area.width = gtk_adjustment_get_page_size (view->hadjustment);
 650                 current_area.y = gtk_adjustment_get_value (view->vadjustment);
 651                 current_area.height = gtk_adjustment_get_page_size (view->vadjustment);
 652
 653                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 654
 655                         ev_view_get_page_extents (view, i, &page_area, &border);
 656
 657                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 658                                 area = unused.width * unused.height;
 659
 660                                 if (!found) {
 661                                         area_max = area;
 662                                         view->start_page = i;
 663                                         found = TRUE;
 664                                         best_current_page = i;
 665                                 }
 666                                 if (area > area_max) {
 667                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 668                                         area_max = area;
 669                                 }
 670
 671                                 view->end_page = i;
 672                                 j = 0;
 673                         } else if (found && view->current_page <= view->end_page) {
 674                                 if (view->dual_page && j < 1) {
 675                                         /* In dual mode  we stop searching
 676                                          * after two consecutive non-visible pages.
 677                                          */
 678                                         j++;
 679                                         continue;
 680                                 }
 681                                 break;
 682                         }
 683                 }
 684
 685                 if (view->pending_scroll == SCROLL_TO_KEEP_POSITION) {
 686                         best_current_page = MAX (best_current_page, view->start_page);
 687
 688                         if (view->current_page != best_current_page) {
 689                                 view->current_page = best_current_page;
 690                                 hide_loading_window (view);
 691                                 ev_document_model_set_page (view->model, best_current_page);
 692                         }
 693                 }
 694         } else if (view->dual_page) {
 695                 if (view->current_page % 2 == get_dual_even_left (view)) {
 696                         view->start_page = view->current_page;
 697                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 698                                 view->end_page = view->start_page + 1;
 699                         else
 700                                 view->end_page = view->start_page;
 701                 } else {
 702                         if (view->current_page < 1)
 703                                 view->start_page = view->current_page;
 704                         else
 705                                 view->start_page = view->current_page - 1;
 706                         view->end_page = view->current_page;
 707                 }
 708         } else {
 709                 view->start_page = view->current_page;
 710                 view->end_page = view->current_page;
 711         }
 712
 713         if (view->start_page == -1 || view->end_page == -1)
 714                 return;
 715
 716         if (start != view->start_page || end != view->end_page) {
 717                 gint i;
 718
 719                 for (i = start; i < view->start_page && start != -1; i++) {
 720                         hide_annotation_windows (view, i);
 721                 }
 722
 723                 for (i = end; i > view->end_page && end != -1; i--) {
 724                         hide_annotation_windows (view, i);
 725                 }
 726         }
 727
 728         ev_page_cache_set_page_range (view->page_cache,
 729                                       view->start_page,
 730                                       view->end_page);
 731         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 732                                         view->start_page,
 733                                         view->end_page,
 734                                         view->selection_info.selections);
 735
 736         if (ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page))
 737             gtk_widget_queue_draw (GTK_WIDGET (view));
 738 }
 739
 740 static void
 741 set_scroll_adjustment (EvView *view,
 742                        GtkOrientation  orientation,
 743                        GtkAdjustment  *adjustment)
 744 {
 745         GtkAdjustment **to_set;
 746
 747         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 748                 to_set = &view->hadjustment;
 749         else
 750                 to_set = &view->vadjustment;
 751
 752         if (*to_set != adjustment) {
 753                 if (*to_set) {
 754                         g_signal_handlers_disconnect_by_func (*to_set,
 755                                                               (gpointer) on_adjustment_value_changed,
 756                                                               view);
 757                         g_object_unref (*to_set);
 758                 }
 759
 760                 *to_set = adjustment;
 761                 view_set_adjustment_values (view, orientation);
 762
 763                 if (*to_set) {
 764                         g_object_ref (*to_set);
 765                         g_signal_connect (*to_set, "value_changed",
 766                                           G_CALLBACK (on_adjustment_value_changed), view);
 767                 }
 768         }
 769 }
 770
 771 static void
 772 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 773                                 GtkAdjustment  *hadjustment,
 774                                 GtkAdjustment  *vadjustment)
 775 {
 776         EvView *view = EV_VIEW (layout);
 777
 778         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 779         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 780
 781         on_adjustment_value_changed (NULL, view);
 782 }
 783
 784 static void
 785 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 786                            guint           keyval,
 787                            GdkModifierType modifiers,
 788                            GtkScrollType   scroll,
 789                            gboolean        horizontal)
 790 {
 791   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 792
 793   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 794                                 "binding_activated", 2,
 795                                 GTK_TYPE_SCROLL_TYPE, scroll,
 796                                 G_TYPE_BOOLEAN, horizontal);
 797   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 798                                 "binding_activated", 2,
 799                                 GTK_TYPE_SCROLL_TYPE, scroll,
 800                                 G_TYPE_BOOLEAN, horizontal);
 801 }
 802
 803 static gdouble
 804 compute_scroll_increment (EvView        *view,
 805                           GtkScrollType  scroll)
 806 {
 807         GtkWidget *widget = GTK_WIDGET (view);
 808         GtkAdjustment *adjustment = view->vadjustment;
 809         cairo_region_t *text_region, *region;
 810         GtkAllocation allocation;
 811         gint page;
 812         GdkRectangle rect;
 813         EvRectangle doc_rect;
 814         GdkRectangle page_area;
 815         GtkBorder border;
 816         gdouble fraction = 1.0;
 817
 818         if (scroll != GTK_SCROLL_PAGE_BACKWARD && scroll != GTK_SCROLL_PAGE_FORWARD)
 819                 return gtk_adjustment_get_page_size (adjustment);
 820
 821         page = scroll == GTK_SCROLL_PAGE_BACKWARD ? view->start_page : view->end_page;
 822
 823         text_region = ev_page_cache_get_text_mapping (view->page_cache, page);
 824         if (!text_region || cairo_region_is_empty (text_region))
 825                 return gtk_adjustment_get_page_size (adjustment);
 826
 827         gtk_widget_get_allocation (widget, &allocation);
 828         ev_view_get_page_extents (view, page, &page_area, &border);
 829         rect.x = page_area.x + view->scroll_x;
 830         rect.y = view->scroll_y + (scroll == GTK_SCROLL_PAGE_BACKWARD ? 5 : allocation.height - 5);
 831         rect.width = page_area.width;
 832         rect.height = 1;
 833         view_rect_to_doc_rect (view, &rect, &page_area, &doc_rect);
 834
 835         /* Convert the doc rectangle into a GdkRectangle */
 836         rect.x = doc_rect.x1;
 837         rect.y = doc_rect.y1;
 838         rect.width = doc_rect.x2 - doc_rect.x1;
 839         rect.height = MAX (1, doc_rect.y2 - doc_rect.y1);
 840         region = cairo_region_create_rectangle (&rect);
 841
 842         cairo_region_intersect (region, text_region);
 843         if (cairo_region_num_rectangles (region)) {
 844                 EvRenderContext *rc;
 845                 EvPage  *ev_page;
 846                 cairo_region_t *sel_region;
 847
 848                 cairo_region_get_rectangle (region, 0, &rect);
 849                 ev_page = ev_document_get_page (view->document, page);
 850                 rc = ev_render_context_new (ev_page, view->rotation, view->scale);
 851                 g_object_unref (ev_page);
 852                 /* Get the selection region to know the height of the line */
 853                 doc_rect.x1 = doc_rect.x2 = rect.x + 0.5;
 854                 doc_rect.y1 = doc_rect.y2 = rect.y + 0.5;
 855
 856                 ev_document_doc_mutex_lock ();
 857                 sel_region = ev_selection_get_selection_region (EV_SELECTION (view->document),
 858                                                                 rc, EV_SELECTION_STYLE_LINE,
 859                                                                 &doc_rect);
 860                 ev_document_doc_mutex_unlock ();
 861
 862                 g_object_unref (rc);
 863
 864                 if (cairo_region_num_rectangles (sel_region) > 0) {
 865                         cairo_region_get_rectangle (sel_region, 0, &rect);
 866                         fraction = 1 - (rect.height / gtk_adjustment_get_page_size (adjustment));
 867                 }
 868                 cairo_region_destroy (sel_region);
 869         }
 870         cairo_region_destroy (region);
 871
 872         return gtk_adjustment_get_page_size (adjustment) * fraction;
 873
 874 }
 875
 876 void
 877 ev_view_scroll (EvView        *view,
 878                 GtkScrollType  scroll,
 879                 gboolean       horizontal)
 880 {
 881         GtkAdjustment *adjustment;
 882         double value, increment;
 883         gdouble upper, lower;
 884         gdouble page_size;
 885         gdouble step_increment;
 886         gboolean first_page = FALSE;
 887         gboolean last_page = FALSE;
 888
 889         view->jump_to_find_result = FALSE;
 890
 891         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
 892                 switch (scroll) {
 893                         case GTK_SCROLL_PAGE_BACKWARD:
 894                         case GTK_SCROLL_STEP_BACKWARD:
 895                                 ev_view_previous_page (view);
 896                                 break;
 897                         case GTK_SCROLL_PAGE_FORWARD:
 898                         case GTK_SCROLL_STEP_FORWARD:
 899                                 ev_view_next_page (view);
 900                                 break;
 901                         default:
 902                                 break;
 903                 }
 904                 return;
 905         }
 906
 907         /* Assign values for increment and vertical adjustment */
 908         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 909         value = gtk_adjustment_get_value (adjustment);
 910         upper = gtk_adjustment_get_upper (adjustment);
 911         lower = gtk_adjustment_get_lower (adjustment);
 912         page_size = gtk_adjustment_get_page_size (adjustment);
 913         step_increment = gtk_adjustment_get_step_increment (adjustment);
 914
 915         /* Assign boolean for first and last page */
 916         if (view->current_page == 0)
 917                 first_page = TRUE;
 918         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 919                 last_page = TRUE;
 920
 921         switch (scroll) {
 922                 case GTK_SCROLL_PAGE_BACKWARD:
 923                         /* Do not jump backwards if at the first page */
 924                         if (value == lower && first_page) {
 925                                 /* Do nothing */
 926                                 /* At the top of a page, assign the upper bound limit of previous page */
 927                         } else if (value == lower) {
 928                                 value = upper - page_size;
 929                                 ev_view_previous_page (view);
 930                                 /* Jump to the top */
 931                         } else {
 932                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_BACKWARD);
 933                                 value = MAX (value - increment, lower);
 934                         }
 935                         break;
 936                 case GTK_SCROLL_PAGE_FORWARD:
 937                         /* Do not jump forward if at the last page */
 938                         if (value == (upper - page_size) && last_page) {
 939                                 /* Do nothing */
 940                         /* At the bottom of a page, assign the lower bound limit of next page */
 941                         } else if (value == (upper - page_size)) {
 942                                 value = 0;
 943                                 ev_view_next_page (view);
 944                         /* Jump to the bottom */
 945                         } else {
 946                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_FORWARD);
 947                                 value = MIN (value + increment, upper - page_size);
 948                         }
 949                         break;
 950                 case GTK_SCROLL_STEP_BACKWARD:
 951                         value -= step_increment;
 952                         break;
 953                 case GTK_SCROLL_STEP_FORWARD:
 954                         value += step_increment;
 955                         break;
 956                 case GTK_SCROLL_STEP_DOWN:
 957                         value -= step_increment / 10;
 958                         break;
 959                 case GTK_SCROLL_STEP_UP:
 960                         value += step_increment / 10;
 961                         break;
 962                 default:
 963                         break;
 964         }
 965
 966         value = CLAMP (value, lower, upper - page_size);
 967
 968         gtk_adjustment_set_value (adjustment, value);
 969 }
 970
 971 #define MARGIN 5
 972
 973 static void
 974 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 975 {
 976         GtkWidget *widget = GTK_WIDGET (view);
 977         GtkAdjustment *adjustment;
 978         GtkAllocation allocation;
 979         gdouble adj_value;
 980         int value;
 981
 982         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 983
 984         gtk_widget_get_allocation (widget, &allocation);
 985
 986         adjustment = view->vadjustment;
 987         adj_value = gtk_adjustment_get_value (adjustment);
 988
 989         if (rect->y < adj_value) {
 990                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->y - MARGIN);
 991                 gtk_adjustment_set_value (view->vadjustment, value);
 992         } else if (rect->y + rect->height > adj_value + allocation.height) {
 993                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->y + rect->height -
 994                              allocation.height + MARGIN);
 995                 gtk_adjustment_set_value (view->vadjustment, value);
 996         }
 997
 998         adjustment = view->hadjustment;
 999         adj_value = gtk_adjustment_get_value (adjustment);
1000
1001         if (rect->x < adj_value) {
1002                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->x - MARGIN);
1003                 gtk_adjustment_set_value (view->hadjustment, value);
1004         } else if (rect->x + rect->height > adj_value + allocation.width) {
1005                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->x + rect->width -
1006                              allocation.width + MARGIN);
1007                 gtk_adjustment_set_value (view->hadjustment, value);
1008         }
1009
1010         gtk_widget_queue_resize (GTK_WIDGET (view));
1011 }
1012
1013 /*** Geometry computations ***/
1014
1015 static void
1016 compute_border (EvView *view, int width, int height, GtkBorder *border)
1017 {
1018         ev_document_misc_get_page_border_size (width, height, border);
1019 }
1020
1021 void
1022 _get_page_size_for_scale_and_rotation (EvDocument *document,
1023                                        gint        page,
1024                                        gdouble     scale,
1025                                        gint        rotation,
1026                                        gint       *page_width,
1027                                        gint       *page_height)
1028 {
1029         gdouble w, h;
1030         gint    width, height;
1031
1032         ev_document_get_page_size (document, page, &w, &h);
1033
1034         width = (gint)(w * scale + 0.5);
1035         height = (gint)(h * scale + 0.5);
1036
1037         if (page_width)
1038                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
1039         if (page_height)
1040                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
1041 }
1042
1043 static void
1044 ev_view_get_page_size (EvView *view,
1045                        gint    page,
1046                        gint   *page_width,
1047                        gint   *page_height)
1048 {
1049         _get_page_size_for_scale_and_rotation (view->document,
1050                                                page,
1051                                                view->scale,
1052                                                view->rotation,
1053                                                page_width,
1054                                                page_height);
1055 }
1056
1057 static void
1058 ev_view_get_max_page_size (EvView *view,
1059                            gint   *max_width,
1060                            gint   *max_height)
1061 {
1062         double w, h;
1063         gint   width, height;
1064
1065         ev_document_get_max_page_size (view->document, &w, &h);
1066
1067         width = (gint)(w * view->scale + 0.5);
1068         height = (gint)(h * view->scale + 0.5);
1069
1070         if (max_width)
1071                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
1072         if (max_height)
1073                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
1074 }
1075
1076 static void
1077 get_page_y_offset (EvView *view, int page, int *y_offset)
1078 {
1079         int max_width, offset;
1080         GtkBorder border;
1081
1082         g_return_if_fail (y_offset != NULL);
1083
1084         ev_view_get_max_page_size (view, &max_width, NULL);
1085         compute_border (view, max_width, max_width, &border);
1086
1087         if (view->dual_page) {
1088                 ev_view_get_height_to_page (view, page, NULL, &offset);
1089                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
1090                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
1091         } else {
1092                 ev_view_get_height_to_page (view, page, &offset, NULL);
1093                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
1094         }
1095
1096         *y_offset = offset;
1097         return;
1098 }
1099
1100 gboolean
1101 ev_view_get_page_extents (EvView       *view,
1102                           gint          page,
1103                           GdkRectangle *page_area,
1104                           GtkBorder    *border)
1105 {
1106         GtkWidget *widget;
1107         int width, height;
1108         GtkAllocation allocation;
1109
1110         widget = GTK_WIDGET (view);
1111         gtk_widget_get_allocation (widget, &allocation);
1112
1113         /* Get the size of the page */
1114         ev_view_get_page_size (view, page, &width, &height);
1115         compute_border (view, width, height, border);
1116         page_area->width = width + border->left + border->right;
1117         page_area->height = height + border->top + border->bottom;
1118
1119         if (view->continuous) {
1120                 gint max_width;
1121                 gint x, y;
1122
1123                 ev_view_get_max_page_size (view, &max_width, NULL);
1124                 max_width = max_width + border->left + border->right;
1125                 /* Get the location of the bounding box */
1126                 if (view->dual_page) {
1127                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1128                         x = x + MAX (0, allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1129                         if (page % 2 == get_dual_even_left (view))
1130                                 x = x + (max_width - width - border->left - border->right);
1131                 } else {
1132                         x = view->spacing;
1133                         x = x + MAX (0, allocation.width - (width + view->spacing * 2)) / 2;
1134                 }
1135
1136                 get_page_y_offset (view, page, &y);
1137
1138                 page_area->x = x;
1139                 page_area->y = y;
1140         } else {
1141                 gint x, y;
1142                 if (view->dual_page) {
1143                         gint width_2, height_2;
1144                         gint max_width = width;
1145                         gint max_height = height;
1146                         GtkBorder overall_border;
1147                         gint other_page;
1148
1149                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1150
1151                         /* First, we get the bounding box of the two pages */
1152                         if (other_page < ev_document_get_n_pages (view->document)
1153                             && (0 <= other_page)) {
1154                                 ev_view_get_page_size (view, other_page,
1155                                                        &width_2, &height_2);
1156                                 if (width_2 > width)
1157                                         max_width = width_2;
1158                                 if (height_2 > height)
1159                                         max_height = height_2;
1160                         }
1161                         compute_border (view, max_width, max_height, &overall_border);
1162
1163                         /* Find the offsets */
1164                         x = view->spacing;
1165                         y = view->spacing;
1166
1167                         /* Adjust for being the left or right page */
1168                         if (page % 2 == get_dual_even_left (view))
1169                                 x = x + max_width - width;
1170                         else
1171                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1172
1173                         y = y + (max_height - height)/2;
1174
1175                         /* Adjust for extra allocation */
1176                         x = x + MAX (0, allocation.width -
1177                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1178                         y = y + MAX (0, allocation.height - (height + view->spacing * 2))/2;
1179                 } else {
1180                         x = view->spacing;
1181                         y = view->spacing;
1182
1183                         /* Adjust for extra allocation */
1184                         x = x + MAX (0, allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1185                         y = y + MAX (0, allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1186                 }
1187
1188                 page_area->x = x;
1189                 page_area->y = y;
1190         }
1191
1192         return TRUE;
1193 }
1194
1195 static void
1196 get_doc_page_size (EvView  *view,
1197                    gint     page,
1198                    gdouble *width,
1199                    gdouble *height)
1200 {
1201         double w, h;
1202
1203         ev_document_get_page_size (view->document, page, &w, &h);
1204         if (view->rotation == 0 || view->rotation == 180) {
1205                 if (width) *width = w;
1206                 if (height) *height = h;
1207         } else {
1208                 if (width) *width = h;
1209                 if (height) *height = w;
1210         }
1211 }
1212
1213 static void
1214 view_point_to_doc_point (EvView *view,
1215                          GdkPoint *view_point,
1216                          GdkRectangle *page_area,
1217                          double  *doc_point_x,
1218                          double  *doc_point_y)
1219 {
1220         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1221         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1222 }
1223
1224 static void
1225 view_rect_to_doc_rect (EvView *view,
1226                        GdkRectangle *view_rect,
1227                        GdkRectangle *page_area,
1228                        EvRectangle  *doc_rect)
1229 {
1230         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1231         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1232         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1233         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1234 }
1235
1236 static void
1237 doc_point_to_view_point (EvView       *view,
1238                          int           page,
1239                          EvPoint      *doc_point,
1240                          GdkPoint     *view_point)
1241 {
1242         GdkRectangle page_area;
1243         GtkBorder border;
1244         double x, y, view_x, view_y;
1245         gdouble width, height;
1246
1247         get_doc_page_size (view, page, &width, &height);
1248
1249         if (view->rotation == 0) {
1250                 x = doc_point->x;
1251                 y = doc_point->y;
1252         } else if (view->rotation == 90) {
1253                 x = width - doc_point->y;
1254                 y = doc_point->x;
1255         } else if (view->rotation == 180) {
1256                 x = width - doc_point->x;
1257                 y = height - doc_point->y;
1258         } else if (view->rotation == 270) {
1259                 x = doc_point->y;
1260                 y = height - doc_point->x;
1261         } else {
1262                 g_assert_not_reached ();
1263         }
1264
1265         ev_view_get_page_extents (view, page, &page_area, &border);
1266
1267         view_x = CLAMP (x * view->scale, 0, page_area.width);
1268         view_y = CLAMP (y * view->scale, 0, page_area.height);
1269         view_point->x = view_x + page_area.x;
1270         view_point->y = view_y + page_area.y;
1271 }
1272
1273 static void
1274 doc_rect_to_view_rect (EvView       *view,
1275                        int           page,
1276                        EvRectangle  *doc_rect,
1277                        GdkRectangle *view_rect)
1278 {
1279         GdkRectangle page_area;
1280         GtkBorder border;
1281         double x, y, w, h;
1282         gdouble width, height;
1283
1284         get_doc_page_size (view, page, &width, &height);
1285
1286         if (view->rotation == 0) {
1287                 x = doc_rect->x1;
1288                 y = doc_rect->y1;
1289                 w = doc_rect->x2 - doc_rect->x1;
1290                 h = doc_rect->y2 - doc_rect->y1;
1291         } else if (view->rotation == 90) {
1292                 x = width - doc_rect->y2;
1293                 y = doc_rect->x1;
1294                 w = doc_rect->y2 - doc_rect->y1;
1295                 h = doc_rect->x2 - doc_rect->x1;
1296         } else if (view->rotation == 180) {
1297                 x = width - doc_rect->x2;
1298                 y = height - doc_rect->y2;
1299                 w = doc_rect->x2 - doc_rect->x1;
1300                 h = doc_rect->y2 - doc_rect->y1;
1301         } else if (view->rotation == 270) {
1302                 x = doc_rect->y1;
1303                 y = height - doc_rect->x2;
1304                 w = doc_rect->y2 - doc_rect->y1;
1305                 h = doc_rect->x2 - doc_rect->x1;
1306         } else {
1307                 g_assert_not_reached ();
1308         }
1309
1310         ev_view_get_page_extents (view, page, &page_area, &border);
1311
1312         view_rect->x = x * view->scale + page_area.x;
1313         view_rect->y = y * view->scale + page_area.y;
1314         view_rect->width = w * view->scale;
1315         view_rect->height = h * view->scale;
1316 }
1317
1318 static gboolean
1319 get_dual_even_left (EvView *view)
1320 {
1321         return (ev_document_get_n_pages (view->document) > 2);
1322 }
1323
1324 static void
1325 find_page_at_location (EvView  *view,
1326                        gdouble  x,
1327                        gdouble  y,
1328                        gint    *page,
1329                        gint    *x_offset,
1330                        gint    *y_offset)
1331 {
1332         int i;
1333
1334         if (view->document == NULL)
1335                 return;
1336
1337         g_assert (page);
1338         g_assert (x_offset);
1339         g_assert (y_offset);
1340
1341         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1342                 GdkRectangle page_area;
1343                 GtkBorder border;
1344
1345                 if (! ev_view_get_page_extents (view, i, &page_area, &border))
1346                         continue;
1347
1348                 if ((x >= page_area.x + border.left) &&
1349                     (x < page_area.x + page_area.width - border.right) &&
1350                     (y >= page_area.y + border.top) &&
1351                     (y < page_area.y + page_area.height - border.bottom)) {
1352                         *page = i;
1353                         *x_offset = x - (page_area.x + border.left);
1354                         *y_offset = y - (page_area.y + border.top);
1355                         return;
1356                 }
1357         }
1358
1359         *page = -1;
1360 }
1361
1362 static gboolean
1363 location_in_text (EvView  *view,
1364                   gdouble  x,
1365                   gdouble  y)
1366 {
1367         cairo_region_t *region;
1368         gint page = -1;
1369         gint x_offset = 0, y_offset = 0;
1370
1371         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1372
1373         if (page == -1)
1374                 return FALSE;
1375
1376         region = ev_page_cache_get_text_mapping (view->page_cache, page);
1377
1378         if (region)
1379                 return cairo_region_contains_point (region, x_offset / view->scale, y_offset / view->scale);
1380         else
1381                 return FALSE;
1382 }
1383
1384 static gboolean
1385 location_in_selected_text (EvView  *view,
1386                            gdouble  x,
1387                            gdouble  y)
1388 {
1389         gint page = -1;
1390         gint x_offset = 0, y_offset = 0;
1391         EvViewSelection *selection;
1392         GList *l = NULL;
1393
1394         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1395                 selection = (EvViewSelection *)l->data;
1396
1397                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1398
1399                 if (page != selection->page)
1400                         continue;
1401
1402                 if (selection->covered_region &&
1403                     cairo_region_contains_point (selection->covered_region, x_offset, y_offset))
1404                         return TRUE;
1405         }
1406
1407         return FALSE;
1408 }
1409
1410 static gboolean
1411 get_doc_point_from_offset (EvView *view,
1412                            gint    page,
1413                            gint    x_offset,
1414                            gint    y_offset,
1415                            gint   *x_new,
1416                            gint   *y_new)
1417 {
1418         gdouble width, height;
1419         double x, y;
1420
1421         get_doc_page_size (view, page, &width, &height);
1422
1423         x_offset = x_offset / view->scale;
1424         y_offset = y_offset / view->scale;
1425
1426         if (view->rotation == 0) {
1427                 x = x_offset;
1428                 y = y_offset;
1429         } else if (view->rotation == 90) {
1430                 x = y_offset;
1431                 y = width - x_offset;
1432         } else if (view->rotation == 180) {
1433                 x = width - x_offset;
1434                 y = height - y_offset;
1435         } else if (view->rotation == 270) {
1436                 x = height - y_offset;
1437                 y = x_offset;
1438         } else {
1439                 g_assert_not_reached ();
1440         }
1441
1442         *x_new = x;
1443         *y_new = y;
1444
1445         return TRUE;
1446 }
1447
1448 static gboolean
1449 get_doc_point_from_location (EvView  *view,
1450                              gdouble  x,
1451                              gdouble  y,
1452                              gint    *page,
1453                              gint    *x_new,
1454                              gint    *y_new)
1455 {
1456         gint x_offset = 0, y_offset = 0;
1457
1458         x += view->scroll_x;
1459         y += view->scroll_y;
1460         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1461         if (*page == -1)
1462                 return FALSE;
1463
1464         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1465 }
1466
1467 static void
1468 ev_view_get_area_from_mapping (EvView        *view,
1469                                guint          page,
1470                                EvMappingList *mapping_list,
1471                                gconstpointer  data,
1472                                GdkRectangle  *area)
1473 {
1474         EvMapping *mapping;
1475
1476         mapping = ev_mapping_list_find (mapping_list, data);
1477         doc_rect_to_view_rect (view, page, &mapping->area, area);
1478         area->x -= view->scroll_x;
1479         area->y -= view->scroll_y;
1480 }
1481
1482
1483 /*** Hyperref ***/
1484 static EvLink *
1485 ev_view_get_link_at_location (EvView  *view,
1486                               gdouble  x,
1487                               gdouble  y)
1488 {
1489         gint page = -1;
1490         gint x_new = 0, y_new = 0;
1491         EvMappingList *link_mapping;
1492
1493         if (!EV_IS_DOCUMENT_LINKS (view->document))
1494                 return NULL;
1495
1496         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1497                 return NULL;
1498
1499         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
1500
1501         if (link_mapping)
1502                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1503         else
1504                 return NULL;
1505 }
1506
1507 static void
1508 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1509 {
1510         EvPoint doc_point;
1511         gdouble zoom, left, top;
1512         gboolean change_left, change_top;
1513         GtkAllocation allocation;
1514
1515         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1516
1517         left = ev_link_dest_get_left (dest, &change_left);
1518         top = ev_link_dest_get_top (dest, &change_top);
1519
1520         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1521                                        ev_link_dest_get_bottom (dest) - top,
1522                                        allocation.width,
1523                                        allocation.height);
1524
1525         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1526         ev_document_model_set_scale (view->model, zoom);
1527
1528         doc_point.x = change_left ? left : 0;
1529         doc_point.y = change_top ? top : 0;
1530         view->pending_point = doc_point;
1531
1532         ev_view_change_page (view, ev_link_dest_get_page (dest));
1533 }
1534
1535 static void
1536 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1537 {
1538         EvPoint doc_point;
1539         gdouble doc_width, doc_height;
1540         gint page;
1541         double zoom, left;
1542         gboolean change_left;
1543         GtkAllocation allocation;
1544
1545         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1546
1547         page = ev_link_dest_get_page (dest);
1548         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1549
1550         left = ev_link_dest_get_left (dest, &change_left);
1551         doc_point.x = change_left ? left : 0;
1552         doc_point.y = 0;
1553
1554         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1555                                          allocation.width,
1556                                          allocation.height);
1557
1558         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1559         ev_document_model_set_scale (view->model, zoom);
1560
1561         view->pending_point = doc_point;
1562
1563         ev_view_change_page (view, page);
1564 }
1565
1566 static void
1567 goto_fith_dest (EvView *view, EvLinkDest *dest)
1568 {
1569         EvPoint doc_point;
1570         gdouble doc_width, doc_height;
1571         gint page;
1572         gdouble zoom, top;
1573         gboolean change_top;
1574         GtkAllocation allocation;
1575
1576         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1577
1578         page = ev_link_dest_get_page (dest);
1579         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1580
1581         top = ev_link_dest_get_top (dest, &change_top);
1582
1583         doc_point.x = 0;
1584         doc_point.y = change_top ? top : 0;
1585
1586         zoom = zoom_for_size_fit_width (doc_width, top,
1587                                         allocation.width,
1588                                         allocation.height);
1589
1590         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1591         ev_document_model_set_scale (view->model, zoom);
1592
1593         view->pending_point = doc_point;
1594
1595         ev_view_change_page (view, page);
1596 }
1597
1598 static void
1599 goto_fit_dest (EvView *view, EvLinkDest *dest)
1600 {
1601         double zoom;
1602         gdouble doc_width, doc_height;
1603         int page;
1604         GtkAllocation allocation;
1605
1606         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1607
1608         page = ev_link_dest_get_page (dest);
1609         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1610
1611         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1612                                        allocation.width,
1613                                        allocation.height);
1614
1615         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1616         ev_document_model_set_scale (view->model, zoom);
1617
1618         ev_view_change_page (view, page);
1619 }
1620
1621 static void
1622 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1623 {
1624         EvPoint doc_point;
1625         gint page;
1626         gdouble zoom, left, top;
1627         gboolean change_zoom, change_left, change_top;
1628
1629         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1630         page = ev_link_dest_get_page (dest);
1631
1632         if (change_zoom && zoom > 1) {
1633                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1634                 ev_document_model_set_scale (view->model, zoom);
1635         }
1636
1637         left = ev_link_dest_get_left (dest, &change_left);
1638         top = ev_link_dest_get_top (dest, &change_top);
1639
1640         doc_point.x = change_left ? left : 0;
1641         doc_point.y = change_top ? top : 0;
1642         view->pending_point = doc_point;
1643
1644         ev_view_change_page (view, page);
1645 }
1646
1647 static void
1648 goto_dest (EvView *view, EvLinkDest *dest)
1649 {
1650         EvLinkDestType type;
1651         int page, n_pages, current_page;
1652
1653         page = ev_link_dest_get_page (dest);
1654         n_pages = ev_document_get_n_pages (view->document);
1655
1656         if (page < 0 || page >= n_pages)
1657                 return;
1658
1659         current_page = view->current_page;
1660
1661         type = ev_link_dest_get_dest_type (dest);
1662
1663         switch (type) {
1664                 case EV_LINK_DEST_TYPE_PAGE:
1665                         ev_document_model_set_page (view->model, page);
1666                         break;
1667                 case EV_LINK_DEST_TYPE_FIT:
1668                         goto_fit_dest (view, dest);
1669                         break;
1670                 case EV_LINK_DEST_TYPE_FITH:
1671                         goto_fith_dest (view, dest);
1672                         break;
1673                 case EV_LINK_DEST_TYPE_FITV:
1674                         goto_fitv_dest (view, dest);
1675                         break;
1676                 case EV_LINK_DEST_TYPE_FITR:
1677                         goto_fitr_dest (view, dest);
1678                         break;
1679                 case EV_LINK_DEST_TYPE_XYZ:
1680                         goto_xyz_dest (view, dest);
1681                         break;
1682                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1683                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1684                         break;
1685                 default:
1686                         g_assert_not_reached ();
1687         }
1688
1689         if (current_page != view->current_page)
1690                 ev_document_model_set_page (view->model, view->current_page);
1691 }
1692
1693 static void
1694 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1695 {
1696         EvLinkDestType type;
1697
1698         type = ev_link_dest_get_dest_type (dest);
1699
1700         if (type == EV_LINK_DEST_TYPE_NAMED) {
1701                 EvLinkDest  *dest2;
1702                 const gchar *named_dest;
1703
1704                 named_dest = ev_link_dest_get_named_dest (dest);
1705                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1706                                                           named_dest);
1707                 if (dest2) {
1708                         goto_dest (view, dest2);
1709                         g_object_unref (dest2);
1710                 }
1711
1712                 return;
1713         }
1714
1715         goto_dest (view, dest);
1716 }
1717
1718 void
1719 ev_view_handle_link (EvView *view, EvLink *link)
1720 {
1721         EvLinkAction    *action = NULL;
1722         EvLinkActionType type;
1723
1724         action = ev_link_get_action (link);
1725         if (!action)
1726                 return;
1727
1728         type = ev_link_action_get_action_type (action);
1729
1730         switch (type) {
1731                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1732                         EvLinkDest *dest;
1733
1734                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1735
1736                         dest = ev_link_action_get_dest (action);
1737                         ev_view_goto_dest (view, dest);
1738                 }
1739                         break;
1740                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1741                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1742                 case EV_LINK_ACTION_TYPE_LAUNCH:
1743                 case EV_LINK_ACTION_TYPE_NAMED:
1744                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1745                         break;
1746         }
1747 }
1748
1749 static char *
1750 tip_from_action_named (EvLinkAction *action)
1751 {
1752         const gchar *name = ev_link_action_get_name (action);
1753
1754         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1755                 return g_strdup (_("Go to first page"));
1756         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1757                 return g_strdup (_("Go to previous page"));
1758         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1759                 return g_strdup (_("Go to next page"));
1760         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1761                 return g_strdup (_("Go to last page"));
1762         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1763                 return g_strdup (_("Go to page"));
1764         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1765                 return g_strdup (_("Find"));
1766         }
1767
1768         return NULL;
1769 }
1770
1771 static char *
1772 tip_from_link (EvView *view, EvLink *link)
1773 {
1774         EvLinkAction *action;
1775         EvLinkActionType type;
1776         char *msg = NULL;
1777         char *page_label;
1778         const char *title;
1779
1780         action = ev_link_get_action (link);
1781         title = ev_link_get_title (link);
1782
1783         if (!action)
1784                 return title ? g_strdup (title) : NULL;
1785
1786         type = ev_link_action_get_action_type (action);
1787
1788         switch (type) {
1789                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1790                         page_label = ev_document_links_get_dest_page_label (EV_DOCUMENT_LINKS (view->document),
1791                                                                             ev_link_action_get_dest (action));
1792                         if (page_label) {
1793                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1794                                 g_free (page_label);
1795                         }
1796                         break;
1797                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1798                         if (title) {
1799                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1800                                                        ev_link_action_get_filename (action));
1801                         } else {
1802                                 msg = g_strdup_printf (_("Go to file “%s”"),
1803                                                        ev_link_action_get_filename (action));
1804                         }
1805                         break;
1806                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1807                         msg = g_strdup (ev_link_action_get_uri (action));
1808                         break;
1809                 case EV_LINK_ACTION_TYPE_LAUNCH:
1810                         msg = g_strdup_printf (_("Launch %s"),
1811                                                ev_link_action_get_filename (action));
1812                         break;
1813                 case EV_LINK_ACTION_TYPE_NAMED:
1814                         msg = tip_from_action_named (action);
1815                         break;
1816                 default:
1817                         if (title)
1818                                 msg = g_strdup (title);
1819                         break;
1820         }
1821
1822         return msg;
1823 }
1824
1825 static void
1826 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1827 {
1828         EvLink       *link;
1829         EvFormField  *field;
1830         EvAnnotation *annot = NULL;
1831
1832         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1833                 return;
1834
1835         if (view->drag_info.in_drag) {
1836                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1837                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1838                 return;
1839         }
1840
1841         if (view->scroll_info.autoscrolling) {
1842                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1843                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1844                 return;
1845         }
1846
1847         link = ev_view_get_link_at_location (view, x, y);
1848         if (link) {
1849                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1850         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1851                 if (field->is_read_only) {
1852                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1853                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1854                             view->cursor == EV_VIEW_CURSOR_DRAG)
1855                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1856                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1857                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1858                 } else {
1859                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1860                 }
1861         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1862                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1863         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1864                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1865         } else {
1866                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1867                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1868                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1869                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1870                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1871         }
1872
1873         if (link || annot)
1874                 g_object_set (view, "has-tooltip", TRUE, NULL);
1875 }
1876
1877 /*** Images ***/
1878 static EvImage *
1879 ev_view_get_image_at_location (EvView  *view,
1880                                gdouble  x,
1881                                gdouble  y)
1882 {
1883         gint page = -1;
1884         gint x_new = 0, y_new = 0;
1885         EvMappingList *image_mapping;
1886
1887         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1888                 return NULL;
1889
1890         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1891                 return NULL;
1892
1893         image_mapping = ev_page_cache_get_image_mapping (view->page_cache, page);
1894
1895         if (image_mapping)
1896                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1897         else
1898                 return NULL;
1899 }
1900
1901 /*** Forms ***/
1902 static EvFormField *
1903 ev_view_get_form_field_at_location (EvView  *view,
1904                                     gdouble  x,
1905                                     gdouble  y)
1906 {
1907         gint page = -1;
1908         gint x_new = 0, y_new = 0;
1909         EvMappingList *forms_mapping;
1910
1911         if (!EV_IS_DOCUMENT_FORMS (view->document))
1912                 return NULL;
1913
1914         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1915                 return NULL;
1916
1917         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache, page);
1918
1919         if (forms_mapping)
1920                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1921         else
1922                 return NULL;
1923 }
1924
1925 static cairo_region_t *
1926 ev_view_form_field_get_region (EvView      *view,
1927                                EvFormField *field)
1928 {
1929         GdkRectangle   view_area;
1930         EvMappingList *forms_mapping;
1931
1932         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
1933                                                               field->page->index);
1934         ev_view_get_area_from_mapping (view, field->page->index,
1935                                        forms_mapping,
1936                                        field, &view_area);
1937
1938         return cairo_region_create_rectangle (&view_area);
1939 }
1940
1941 static gboolean
1942 ev_view_forms_remove_widgets (EvView *view)
1943 {
1944         ev_view_remove_all (view);
1945
1946         return FALSE;
1947 }
1948
1949 static void
1950 ev_view_form_field_destroy (GtkWidget *widget,
1951                             EvView    *view)
1952 {
1953         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1954 }
1955
1956 static GtkWidget *
1957 ev_view_form_field_button_create_widget (EvView      *view,
1958                                          EvFormField *field)
1959 {
1960         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1961         cairo_region_t    *field_region = NULL;
1962
1963         switch (field_button->type) {
1964                 case EV_FORM_FIELD_BUTTON_PUSH:
1965                         return NULL;
1966                 case EV_FORM_FIELD_BUTTON_CHECK:
1967                 case EV_FORM_FIELD_BUTTON_RADIO: {
1968                         gboolean       state;
1969                         EvMappingList *forms_mapping;
1970                         GList         *l;
1971
1972                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1973                                                                                field);
1974
1975                         /* FIXME: it actually depends on NoToggleToOff flags */
1976                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1977                             state && field_button->state)
1978                                 return NULL;
1979
1980                         field_region = ev_view_form_field_get_region (view, field);
1981
1982                         /* For radio buttons and checkbox buttons that are in a set
1983                          * we need to update also the region for the current selected item
1984                          */
1985                         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
1986                                                                               field->page->index);
1987                         for (l = ev_mapping_list_get_list (forms_mapping); l; l = g_list_next (l)) {
1988                                 EvFormField *button = ((EvMapping *)(l->data))->data;
1989                                 cairo_region_t *button_region;
1990
1991                                 if (button->id == field->id)
1992                                         continue;
1993
1994                                 /* FIXME: only buttons in the same group should be updated */
1995                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1996                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1997                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1998                                         continue;
1999
2000                                 button_region = ev_view_form_field_get_region (view, button);
2001                                 cairo_region_union (field_region, button_region);
2002                                 cairo_region_destroy (button_region);
2003                         }
2004
2005                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
2006                                                                        field, !state);
2007                         field_button->state = !state;
2008                 }
2009                         break;
2010         }
2011
2012         ev_view_reload_page (view, field->page->index, field_region);
2013         cairo_region_destroy (field_region);
2014
2015         return NULL;
2016 }
2017
2018 static void
2019 ev_view_form_field_text_save (EvView    *view,
2020                               GtkWidget *widget)
2021 {
2022         EvFormField *field;
2023
2024         if (!view->document)
2025                 return;
2026
2027         field = g_object_get_data (G_OBJECT (widget), "form-field");
2028
2029         if (field->changed) {
2030                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2031                 cairo_region_t  *field_region;
2032
2033                 field_region = ev_view_form_field_get_region (view, field);
2034
2035                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
2036                                                             field, field_text->text);
2037                 field->changed = FALSE;
2038                 ev_view_reload_page (view, field->page->index, field_region);
2039                 cairo_region_destroy (field_region);
2040         }
2041 }
2042
2043 static void
2044 ev_view_form_field_text_changed (GtkWidget   *widget,
2045                                  EvFormField *field)
2046 {
2047         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2048         gchar           *text = NULL;
2049
2050         if (GTK_IS_ENTRY (widget)) {
2051                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
2052         } else if (GTK_IS_TEXT_BUFFER (widget)) {
2053                 GtkTextIter start, end;
2054
2055                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
2056                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
2057                                                  &start, &end, FALSE);
2058         }
2059
2060         if (!field_text->text ||
2061             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
2062                 g_free (field_text->text);
2063                 field_text->text = text;
2064                 field->changed = TRUE;
2065         }
2066 }
2067
2068 static GtkWidget *
2069 ev_view_form_field_text_create_widget (EvView      *view,
2070                                        EvFormField *field)
2071 {
2072         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2073         GtkWidget       *text = NULL;
2074         gchar           *txt;
2075
2076         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2077                                                           field);
2078
2079         switch (field_text->type) {
2080                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2081                         /* TODO */
2082                 case EV_FORM_FIELD_TEXT_NORMAL:
2083                         text = gtk_entry_new ();
2084                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2085                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2086                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2087
2088                         if (txt) {
2089                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2090                                 g_free (txt);
2091                         }
2092
2093                         g_signal_connect (text, "changed",
2094                                           G_CALLBACK (ev_view_form_field_text_changed),
2095                                           field);
2096                         g_signal_connect_after (text, "activate",
2097                                                 G_CALLBACK (ev_view_form_field_destroy),
2098                                                 view);
2099                         break;
2100                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2101                         GtkTextBuffer *buffer;
2102
2103                         text = gtk_text_view_new ();
2104                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2105
2106                         if (txt) {
2107                                 gtk_text_buffer_set_text (buffer, txt, -1);
2108                                 g_free (txt);
2109                         }
2110
2111                         g_signal_connect (buffer, "changed",
2112                                           G_CALLBACK (ev_view_form_field_text_changed),
2113                                           field);
2114                 }
2115                         break;
2116         }
2117
2118         g_object_weak_ref (G_OBJECT (text),
2119                            (GWeakNotify)ev_view_form_field_text_save,
2120                            view);
2121
2122         return text;
2123 }
2124
2125 static void
2126 ev_view_form_field_choice_save (EvView    *view,
2127                                 GtkWidget *widget)
2128 {
2129         EvFormField *field;
2130
2131         if (!view->document)
2132                 return;
2133
2134         field = g_object_get_data (G_OBJECT (widget), "form-field");
2135
2136         if (field->changed) {
2137                 GList             *l;
2138                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2139                 cairo_region_t    *field_region;
2140
2141                 field_region = ev_view_form_field_get_region (view, field);
2142
2143                 if (field_choice->is_editable) {
2144                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2145                                                                       field, field_choice->text);
2146                 } else {
2147                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2148                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2149                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2150                                                                                  field,
2151                                                                                  GPOINTER_TO_INT (l->data));
2152                         }
2153                 }
2154                 field->changed = FALSE;
2155                 ev_view_reload_page (view, field->page->index, field_region);
2156                 cairo_region_destroy (field_region);
2157         }
2158 }
2159
2160 static void
2161 ev_view_form_field_choice_changed (GtkWidget   *widget,
2162                                    EvFormField *field)
2163 {
2164         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2165
2166         if (GTK_IS_COMBO_BOX (widget)) {
2167                 gint item;
2168
2169                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2170                 if (!field_choice->selected_items ||
2171                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2172                         g_list_free (field_choice->selected_items);
2173                         field_choice->selected_items = NULL;
2174                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2175                                                                        GINT_TO_POINTER (item));
2176                         field->changed = TRUE;
2177                 }
2178
2179                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
2180                         gchar *text;
2181
2182                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
2183                         if (!field_choice->text ||
2184                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2185                                 g_free (field_choice->text);
2186                                 field_choice->text = text;
2187                                 field->changed = TRUE;
2188                         }
2189                 }
2190         } else if (GTK_IS_TREE_SELECTION (widget)) {
2191                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2192                 GtkTreeModel     *model;
2193                 GList            *items, *l;
2194
2195                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2196                 g_list_free (field_choice->selected_items);
2197                 field_choice->selected_items = NULL;
2198
2199                 for (l = items; l && l->data; l = g_list_next (l)) {
2200                         GtkTreeIter  iter;
2201                         GtkTreePath *path = (GtkTreePath *)l->data;
2202                         gint         item;
2203
2204                         gtk_tree_model_get_iter (model, &iter, path);
2205                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2206
2207                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2208                                                                        GINT_TO_POINTER (item));
2209
2210                         gtk_tree_path_free (path);
2211                 }
2212
2213                 g_list_free (items);
2214
2215                 field->changed = TRUE;
2216         }
2217 }
2218
2219 static GtkWidget *
2220 ev_view_form_field_choice_create_widget (EvView      *view,
2221                                          EvFormField *field)
2222 {
2223         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2224         GtkWidget         *choice;
2225         GtkTreeModel      *model;
2226         gint               n_items, i;
2227         gint               selected_item = 0;
2228
2229         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2230                                                                    field);
2231         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2232         for (i = 0; i < n_items; i++) {
2233                 GtkTreeIter iter;
2234                 gchar      *item;
2235
2236                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2237                                                                      field, i);
2238                 if (ev_document_forms_form_field_choice_is_item_selected (
2239                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2240                         selected_item = i;
2241                         /* FIXME: we need a get_selected_items function in poppler */
2242                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2243                                                                        GINT_TO_POINTER (i));
2244                 }
2245
2246                 if (item) {
2247                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2248                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2249                                             0, item,
2250                                             1, i,
2251                                             -1);
2252                         g_free (item);
2253                 }
2254         }
2255
2256         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2257                 GtkCellRenderer  *renderer;
2258                 GtkWidget        *tree_view;
2259                 GtkTreeSelection *selection;
2260
2261                 tree_view = gtk_tree_view_new_with_model (model);
2262                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2263
2264                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2265                 if (field_choice->multi_select) {
2266                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2267                 }
2268
2269                 /* TODO: set selected items */
2270
2271                 renderer = gtk_cell_renderer_text_new ();
2272                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2273                                                              0,
2274                                                              "choix", renderer,
2275                                                              "text", 0,
2276                                                              NULL);
2277
2278                 choice = gtk_scrolled_window_new (NULL, NULL);
2279                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2280                                                 GTK_POLICY_AUTOMATIC,
2281                                                 GTK_POLICY_AUTOMATIC);
2282                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2283                 gtk_widget_show (tree_view);
2284
2285                 g_signal_connect (selection, "changed",
2286                                   G_CALLBACK (ev_view_form_field_choice_changed),
2287                                   field);
2288                 g_signal_connect_after (selection, "changed",
2289                                         G_CALLBACK (ev_view_form_field_destroy),
2290                                         view);
2291         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2292                 gchar *text;
2293
2294                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2295                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2296                 if (text) {
2297                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2298                         g_free (text);
2299                 }
2300
2301                 g_signal_connect (choice, "changed",
2302                                   G_CALLBACK (ev_view_form_field_choice_changed),
2303                                   field);
2304                 g_signal_connect_after (gtk_bin_get_child (GTK_BIN (choice)),
2305                                         "activate",
2306                                         G_CALLBACK (ev_view_form_field_destroy),
2307                                         view);
2308         } else { /* ComboBoxText */
2309                 GtkCellRenderer *renderer;
2310
2311                 choice = gtk_combo_box_new_with_model (model);
2312                 renderer = gtk_cell_renderer_text_new ();
2313                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2314                                             renderer, TRUE);
2315                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2316                                                 renderer,
2317                                                 "text", 0,
2318                                                 NULL);
2319                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2320                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2321
2322                 g_signal_connect (choice, "changed",
2323                                   G_CALLBACK (ev_view_form_field_choice_changed),
2324                                   field);
2325                 g_signal_connect_after (choice, "changed",
2326                                         G_CALLBACK (ev_view_form_field_destroy),
2327                                         view);
2328         }
2329
2330         g_object_unref (model);
2331
2332         g_object_weak_ref (G_OBJECT (choice),
2333                            (GWeakNotify)ev_view_form_field_choice_save,
2334                            view);
2335
2336         return choice;
2337 }
2338
2339 static void
2340 ev_view_handle_form_field (EvView      *view,
2341                            EvFormField *field,
2342                            gdouble      x,
2343                            gdouble      y)
2344 {
2345         GtkWidget     *field_widget = NULL;
2346         EvMappingList *form_field_mapping;
2347         GdkRectangle   view_area;
2348
2349         if (field->is_read_only)
2350                 return;
2351
2352         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2353                 field_widget = ev_view_form_field_button_create_widget (view, field);
2354         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2355                 field_widget = ev_view_form_field_text_create_widget (view, field);
2356         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2357                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2358         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2359                 /* TODO */
2360         }
2361
2362         /* Form field doesn't require a widget */
2363         if (!field_widget)
2364                 return;
2365
2366         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2367                                 g_object_ref (field),
2368                                 (GDestroyNotify)g_object_unref);
2369
2370         form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2371                                                                    field->page->index);
2372         ev_view_get_area_from_mapping (view, field->page->index,
2373                                        form_field_mapping,
2374                                        field, &view_area);
2375
2376         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2377         gtk_widget_show (field_widget);
2378         gtk_widget_grab_focus (field_widget);
2379 }
2380
2381 /* Annotations */
2382 static EvViewWindowChild *
2383 ev_view_get_window_child (EvView    *view,
2384                           GtkWidget *window)
2385 {
2386         GList *children = view->window_children;
2387
2388         while (children) {
2389                 EvViewWindowChild *child;
2390
2391                 child = (EvViewWindowChild *)children->data;
2392                 children = children->next;
2393
2394                 if (child->window == window)
2395                         return child;
2396         }
2397
2398         return NULL;
2399 }
2400
2401 static void
2402 ev_view_window_child_move (EvView            *view,
2403                            EvViewWindowChild *child,
2404                            gint               x,
2405                            gint               y)
2406 {
2407         GtkAllocation allocation;
2408         gint          width, height;
2409
2410         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
2411         gtk_window_get_size (GTK_WINDOW (child->window), &width, &height);
2412
2413         child->x = x;
2414         child->y = y;
2415         gtk_window_move (GTK_WINDOW (child->window),
2416                          CLAMP (x, child->parent_x,
2417                                 child->parent_x + allocation.width - width),
2418                          CLAMP (y, child->parent_y,
2419                                 child->parent_y + allocation.height - height));
2420 }
2421
2422 static void
2423 ev_view_window_child_move_with_parent (EvView    *view,
2424                                        GtkWidget *window)
2425 {
2426         EvViewWindowChild *child;
2427         gint               root_x, root_y;
2428
2429         child = ev_view_get_window_child (view, window);
2430         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2431                                &root_x, &root_y);
2432         if (root_x != child->parent_x || root_y != child->parent_y) {
2433                 gint dest_x, dest_y;
2434
2435                 dest_x = child->x + (root_x - child->parent_x);
2436                 dest_y = child->y + (root_y - child->parent_y);
2437                 child->parent_x = root_x;
2438                 child->parent_y = root_y;
2439                 ev_view_window_child_move (view, child, dest_x, dest_y);
2440         }
2441
2442         if (child->visible && !gtk_widget_get_visible (window))
2443                 gtk_widget_show (window);
2444 }
2445
2446 static void
2447 ev_view_window_child_put (EvView    *view,
2448                           GtkWidget *window,
2449                           guint      page,
2450                           gint       x,
2451                           gint       y,
2452                           gdouble    orig_x,
2453                           gdouble    orig_y)
2454 {
2455         EvViewWindowChild *child;
2456         gint               root_x, root_y;
2457
2458         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2459                                &root_x, &root_y);
2460
2461         child = g_new0 (EvViewWindowChild, 1);
2462         child->window = window;
2463         child->page = page;
2464         child->orig_x = orig_x;
2465         child->orig_y = orig_y;
2466         child->parent_x = root_x;
2467         child->parent_y = root_y;
2468         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2469         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2470
2471         if (child->visible)
2472                 gtk_widget_show (window);
2473         else
2474                 gtk_widget_hide (window);
2475
2476         view->window_children = g_list_append (view->window_children, child);
2477 }
2478
2479 static EvViewWindowChild *
2480 ev_view_find_window_child_for_annot (EvView       *view,
2481                                      guint         page,
2482                                      EvAnnotation *annot)
2483 {
2484         GList *children = view->window_children;
2485
2486         while (children) {
2487                 EvViewWindowChild *child;
2488                 EvAnnotation      *wannot;
2489
2490                 child = (EvViewWindowChild *)children->data;
2491                 children = children->next;
2492
2493                 if (child->page != page)
2494                         continue;
2495
2496                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2497                 if (wannot == annot || strcmp (wannot->name, annot->name) == 0)
2498                         return child;
2499         }
2500
2501         return NULL;
2502 }
2503
2504 static void
2505 ev_view_window_children_free (EvView *view)
2506 {
2507         GList *l;
2508
2509         if (!view->window_children)
2510                 return;
2511
2512         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2513                 EvViewWindowChild *child;
2514
2515                 child = (EvViewWindowChild *)l->data;
2516                 gtk_widget_destroy (GTK_WIDGET (child->window));
2517                 g_free (child);
2518         }
2519         g_list_free (view->window_children);
2520         view->window_children = NULL;
2521         view->window_child_focus = NULL;
2522 }
2523
2524 static void
2525 annotation_window_grab_focus (GtkWidget *widget,
2526                               EvView    *view)
2527 {
2528         if (view->window_child_focus)
2529                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2530         view->window_child_focus = ev_view_get_window_child (view, widget);
2531 }
2532
2533 static void
2534 annotation_window_closed (EvAnnotationWindow *window,
2535                           EvView             *view)
2536 {
2537         EvViewWindowChild *child;
2538
2539         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2540         child->visible = FALSE;
2541 }
2542
2543 static void
2544 annotation_window_moved (EvAnnotationWindow *window,
2545                          gint                x,
2546                          gint                y,
2547                          EvView             *view)
2548 {
2549         EvViewWindowChild *child;
2550         GdkRectangle       page_area;
2551         GtkBorder          border;
2552         GdkRectangle       view_rect;
2553         EvRectangle        doc_rect;
2554         gint               width, height;
2555
2556         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2557         if (child->x == x && child->y == y)
2558                 return;
2559
2560         child->moved = TRUE;
2561         child->x = x;
2562         child->y = y;
2563
2564         /* Window has been moved by the user,
2565          * we have to set a new origin in doc coords
2566          */
2567         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2568         view_rect.x = (x - child->parent_x) + view->scroll_x;
2569         view_rect.y = (y - child->parent_y) + view->scroll_y;
2570         view_rect.width = width;
2571         view_rect.height = height;
2572
2573         ev_view_get_page_extents (view, child->page, &page_area, &border);
2574         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2575         child->orig_x = doc_rect.x1;
2576         child->orig_y = doc_rect.y1;
2577 }
2578
2579 static void
2580 ev_view_annotation_save (EvView       *view,
2581                          EvAnnotation *annot)
2582 {
2583         if (!view->document)
2584                 return;
2585
2586         if (!annot->changed)
2587                 return;
2588
2589         ev_document_annotations_annotation_set_contents (EV_DOCUMENT_ANNOTATIONS (view->document),
2590                                                          annot, annot->contents);
2591         annot->changed = FALSE;
2592 }
2593
2594 static void
2595 show_annotation_windows (EvView *view,
2596                          gint    page)
2597 {
2598         EvMappingList *annots;
2599         GList         *l;
2600         GtkWindow     *parent;
2601
2602         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2603
2604         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2605
2606         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2607                 EvAnnotation      *annot;
2608                 EvViewWindowChild *child;
2609                 GtkWidget         *window;
2610                 EvRectangle       *doc_rect;
2611                 GdkRectangle       view_rect;
2612
2613                 annot = ((EvMapping *)(l->data))->data;
2614
2615                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2616                         continue;
2617
2618                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2619                         continue;
2620
2621                 window = g_object_get_data (G_OBJECT (annot), "popup");
2622                 if (window) {
2623                         ev_view_window_child_move_with_parent (view, window);
2624                         continue;
2625                 }
2626
2627                 /* Look if we already have a popup for this annot */
2628                 child = ev_view_find_window_child_for_annot (view, page, annot);
2629                 window = child ? child->window : NULL;
2630                 if (window) {
2631                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2632                         g_object_set_data (G_OBJECT (annot), "popup", window);
2633                         ev_view_window_child_move_with_parent (view, window);
2634                 } else {
2635                         window = ev_annotation_window_new (annot, parent);
2636                         g_signal_connect (window, "grab_focus",
2637                                           G_CALLBACK (annotation_window_grab_focus),
2638                                           view);
2639                         g_signal_connect (window, "closed",
2640                                           G_CALLBACK (annotation_window_closed),
2641                                           view);
2642                         g_signal_connect (window, "moved",
2643                                           G_CALLBACK (annotation_window_moved),
2644                                           view);
2645                         g_object_set_data (G_OBJECT (annot), "popup", window);
2646
2647                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2648                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2649                         view_rect.x -= view->scroll_x;
2650                         view_rect.y -= view->scroll_y;
2651
2652                         ev_view_window_child_put (view, window, page,
2653                                                   view_rect.x, view_rect.y,
2654                                                   doc_rect->x1, doc_rect->y1);
2655
2656                         g_object_weak_ref (G_OBJECT (annot),
2657                                            (GWeakNotify)ev_view_annotation_save,
2658                                            view);
2659                 }
2660         }
2661 }
2662
2663 static void
2664 hide_annotation_windows (EvView *view,
2665                          gint    page)
2666 {
2667         EvMappingList *annots;
2668         GList         *l;
2669
2670         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2671
2672         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2673                 EvAnnotation *annot;
2674                 GtkWidget    *window;
2675
2676                 annot = ((EvMapping *)(l->data))->data;
2677
2678                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2679                         continue;
2680
2681                 window = g_object_get_data (G_OBJECT (annot), "popup");
2682                 if (window)
2683                         gtk_widget_hide (window);
2684         }
2685 }
2686
2687 static EvAnnotation *
2688 ev_view_get_annotation_at_location (EvView  *view,
2689                                     gdouble  x,
2690                                     gdouble  y)
2691 {
2692         gint page = -1;
2693         gint x_new = 0, y_new = 0;
2694         EvMappingList *annotations_mapping;
2695
2696         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2697                 return NULL;
2698
2699         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2700                 return NULL;
2701
2702         annotations_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
2703
2704         if (annotations_mapping)
2705                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2706         else
2707                 return NULL;
2708 }
2709
2710 static void
2711 ev_view_handle_annotation (EvView       *view,
2712                            EvAnnotation *annot,
2713                            gdouble       x,
2714                            gdouble       y,
2715                            guint32       timestamp)
2716 {
2717         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2718                 GtkWidget *window;
2719
2720                 window = g_object_get_data (G_OBJECT (annot), "popup");
2721                 if (window) {
2722                         EvViewWindowChild *child;
2723
2724                         child = ev_view_get_window_child (view, window);
2725                         if (!child->visible) {
2726                                 child->visible = TRUE;
2727                                 ev_view_window_child_move (view, child, child->x, child->y);
2728                                 gtk_widget_show (window);
2729                         }
2730                 }
2731         }
2732
2733         if (EV_IS_ANNOTATION_ATTACHMENT (annot)) {
2734                 EvAttachment *attachment = EV_ANNOTATION_ATTACHMENT (annot)->attachment;
2735
2736                 if (attachment) {
2737                         GError *error = NULL;
2738
2739                         ev_attachment_open (attachment,
2740                                             gtk_widget_get_screen (GTK_WIDGET (view)),
2741                                             timestamp,
2742                                             &error);
2743
2744                         if (error) {
2745                                 g_warning ("%s", error->message);
2746                                 g_error_free (error);
2747                         }
2748                 }
2749         }
2750 }
2751
2752 void
2753 ev_view_focus_annotation (EvView    *view,
2754                           EvMapping *annot_mapping)
2755 {
2756         GdkRectangle  view_rect;
2757         EvAnnotation *annot;
2758
2759         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2760                 return;
2761
2762         if (view->focus_annotation == annot_mapping)
2763                 return;
2764
2765         view->focus_annotation = annot_mapping;
2766         annot = (EvAnnotation *)annot_mapping->data;
2767
2768         ev_document_model_set_page (view->model, annot->page->index);
2769
2770         doc_rect_to_view_rect (view, annot->page->index,
2771                                &annot_mapping->area, &view_rect);
2772         ensure_rectangle_is_visible (view, &view_rect);
2773         gtk_widget_queue_draw (GTK_WIDGET (view));
2774 }
2775
2776 static gboolean
2777 ev_view_synctex_backward_search (EvView *view,
2778                                  gdouble x,
2779                                  gdouble y)
2780 {
2781         gint page = -1;
2782         gint x_new = 0, y_new = 0;
2783         EvSourceLink *link;
2784
2785         if (!ev_document_has_synctex (view->document))
2786                 return FALSE;
2787
2788         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2789                 return FALSE;
2790
2791         link = ev_document_synctex_backward_search (view->document, page, x_new, y_new);
2792         if (link) {
2793                 g_signal_emit (view, signals[SIGNAL_SYNC_SOURCE], 0, link);
2794                 g_free (link);
2795
2796                 return TRUE;
2797         }
2798
2799         return FALSE;
2800 }
2801
2802 /*** GtkWidget implementation ***/
2803
2804 static void
2805 ev_view_size_request_continuous_dual_page (EvView         *view,
2806                                            GtkRequisition *requisition)
2807 {
2808         gint n_pages;
2809
2810         n_pages = ev_document_get_n_pages (view->document) + 1;
2811         get_page_y_offset (view, n_pages, &requisition->height);
2812
2813         switch (view->sizing_mode) {
2814                 case EV_SIZING_FIT_WIDTH:
2815                 case EV_SIZING_BEST_FIT:
2816                         requisition->width = 1;
2817
2818                         break;
2819                 case EV_SIZING_FREE: {
2820                         gint max_width;
2821                         GtkBorder border;
2822
2823                         ev_view_get_max_page_size (view, &max_width, NULL);
2824                         compute_border (view, max_width, max_width, &border);
2825                         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2826                 }
2827                         break;
2828                 default:
2829                         g_assert_not_reached ();
2830         }
2831 }
2832
2833 static void
2834 ev_view_size_request_continuous (EvView         *view,
2835                                  GtkRequisition *requisition)
2836 {
2837         gint n_pages;
2838
2839         n_pages = ev_document_get_n_pages (view->document);
2840         get_page_y_offset (view, n_pages, &requisition->height);
2841
2842         switch (view->sizing_mode) {
2843                 case EV_SIZING_FIT_WIDTH:
2844                 case EV_SIZING_BEST_FIT:
2845                         requisition->width = 1;
2846
2847                         break;
2848                 case EV_SIZING_FREE: {
2849                         gint max_width;
2850                         GtkBorder border;
2851
2852                         ev_view_get_max_page_size (view, &max_width, NULL);
2853                         compute_border (view, max_width, max_width, &border);
2854                         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2855                 }
2856                         break;
2857                 default:
2858                         g_assert_not_reached ();
2859         }
2860 }
2861
2862 static void
2863 ev_view_size_request_dual_page (EvView         *view,
2864                                 GtkRequisition *requisition)
2865 {
2866         GtkBorder border;
2867         gint width, height;
2868
2869         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2870                 requisition->width = 1;
2871                 requisition->height = 1;
2872
2873                 return;
2874         }
2875
2876         /* Find the largest of the two. */
2877         ev_view_get_page_size (view,
2878                                view->current_page,
2879                                &width, &height);
2880         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
2881                 gint width_2, height_2;
2882                 ev_view_get_page_size (view,
2883                                        view->current_page + 1,
2884                                        &width_2, &height_2);
2885                 if (width_2 > width) {
2886                         width = width_2;
2887                         height = height_2;
2888                 }
2889         }
2890         compute_border (view, width, height, &border);
2891
2892         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
2893                 ((width + border.left + border.right) * 2) + (view->spacing * 3);
2894         requisition->height = (height + border.top + border.bottom) + (view->spacing * 2);
2895 }
2896
2897 static void
2898 ev_view_size_request_single_page (EvView         *view,
2899                                   GtkRequisition *requisition)
2900 {
2901         GtkBorder border;
2902         gint width, height;
2903
2904         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2905                 requisition->width = 1;
2906                 requisition->height = 1;
2907
2908                 return;
2909         }
2910
2911         ev_view_get_page_size (view, view->current_page, &width, &height);
2912         compute_border (view, width, height, &border);
2913
2914         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
2915                 width + border.left + border.right + (2 * view->spacing);
2916         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2917 }
2918
2919 static void
2920 ev_view_size_request (GtkWidget      *widget,
2921                       GtkRequisition *requisition)
2922 {
2923         EvView *view = EV_VIEW (widget);
2924
2925         if (view->document == NULL) {
2926                 view->requisition.width = 1;
2927                 view->requisition.height = 1;
2928
2929                 *requisition = view->requisition;
2930
2931                 return;
2932         }
2933
2934         /* Get zoom for size here when not called from
2935          * ev_view_size_allocate()
2936          */
2937         if (!view->internal_size_request &&
2938             (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2939              view->sizing_mode == EV_SIZING_BEST_FIT)) {
2940                 GtkAllocation allocation;
2941
2942                 gtk_widget_get_allocation (widget, &allocation);
2943                 ev_view_zoom_for_size (view,
2944                                        allocation.width,
2945                                        allocation.height);
2946         }
2947
2948         if (view->continuous && view->dual_page)
2949                 ev_view_size_request_continuous_dual_page (view, &view->requisition);
2950         else if (view->continuous)
2951                 ev_view_size_request_continuous (view, &view->requisition);
2952         else if (view->dual_page)
2953                 ev_view_size_request_dual_page (view, &view->requisition);
2954         else
2955                 ev_view_size_request_single_page (view, &view->requisition);
2956
2957         *requisition = view->requisition;
2958 }
2959
2960 static void
2961 ev_view_size_allocate (GtkWidget      *widget,
2962                        GtkAllocation  *allocation)
2963 {
2964         EvView *view = EV_VIEW (widget);
2965         GList  *children, *l;
2966         gint    root_x, root_y;
2967
2968         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2969
2970         if (!view->document)
2971                 return;
2972
2973         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2974             view->sizing_mode == EV_SIZING_BEST_FIT) {
2975                 GtkRequisition req;
2976
2977                 ev_view_zoom_for_size (view,
2978                                        allocation->width,
2979                                        allocation->height);
2980                 view->internal_size_request = TRUE;
2981                 ev_view_size_request (widget, &req);
2982                 view->internal_size_request = FALSE;
2983         }
2984
2985         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2986         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2987
2988         if (view->document)
2989                 view_update_range_and_current_page (view);
2990
2991         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2992         view->pending_resize = FALSE;
2993         view->pending_point.x = 0;
2994         view->pending_point.y = 0;
2995
2996         children = gtk_container_get_children (GTK_CONTAINER (widget));
2997         for (l = children; l && l->data; l = g_list_next (l)) {
2998                 EvFormField   *field;
2999                 GdkRectangle   view_area;
3000                 EvMappingList *form_field_mapping;
3001                 GtkAllocation  child_allocation;
3002                 GtkRequisition child_requisition;
3003                 GtkWidget     *child = (GtkWidget *)l->data;
3004
3005                 field = g_object_get_data (G_OBJECT (child), "form-field");
3006                 if (!field)
3007                         continue;
3008
3009                 form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
3010                                                                            field->page->index);
3011                 ev_view_get_area_from_mapping (view, field->page->index,
3012                                                form_field_mapping,
3013                                                field, &view_area);
3014
3015                 gtk_widget_size_request (child, &child_requisition);
3016                 if (child_requisition.width != view_area.width ||
3017                     child_requisition.height != view_area.height)
3018                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
3019
3020                 gtk_container_child_get (GTK_CONTAINER (widget),
3021                                          child,
3022                                          "x", &child_allocation.x,
3023                                          "y", &child_allocation.y,
3024                                          NULL);
3025                 if (child_allocation.x != view_area.x ||
3026                     child_allocation.y != view_area.y) {
3027                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
3028                 }
3029         }
3030         g_list_free (children);
3031
3032         if (view->window_children)
3033                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
3034                                        &root_x, &root_y);
3035
3036         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
3037                 EvViewWindowChild *child;
3038                 EvRectangle        doc_rect;
3039                 GdkRectangle       view_rect;
3040
3041                 child = (EvViewWindowChild *)l->data;
3042
3043                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
3044                 if (child->moved) {
3045                         doc_rect.x1 = child->orig_x;
3046                         doc_rect.y1 = child->orig_y;
3047                 }
3048                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
3049                 view_rect.x -= view->scroll_x;
3050                 view_rect.y -= view->scroll_y;
3051
3052                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
3053                         child->parent_x = root_x;
3054                         child->parent_y = root_y;
3055                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
3056                 }
3057         }
3058 }
3059
3060 static void
3061 ev_view_realize (GtkWidget *widget)
3062 {
3063         EvView    *view = EV_VIEW (widget);
3064         GdkWindow *bin_window;
3065         GtkStyle  *style;
3066
3067         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
3068                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
3069
3070         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3071         gdk_window_set_events (bin_window,
3072                                (gdk_window_get_events (bin_window) |
3073                                 GDK_EXPOSURE_MASK |
3074                                 GDK_BUTTON_PRESS_MASK |
3075                                 GDK_BUTTON_RELEASE_MASK |
3076                                 GDK_SCROLL_MASK |
3077                                 GDK_KEY_PRESS_MASK |
3078                                 GDK_POINTER_MOTION_MASK |
3079                                 GDK_POINTER_MOTION_HINT_MASK |
3080                                 GDK_ENTER_NOTIFY_MASK |
3081                                 GDK_LEAVE_NOTIFY_MASK));
3082
3083         style = gtk_widget_get_style (widget);
3084         gdk_window_set_background (bin_window, &style->mid[GTK_STATE_NORMAL]);
3085
3086         on_adjustment_value_changed (NULL, view);
3087 }
3088
3089 static gboolean
3090 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
3091 {
3092         EvView *view = EV_VIEW (widget);
3093         guint state;
3094
3095         state = event->state & gtk_accelerator_get_default_mod_mask ();
3096
3097         if (state == GDK_CONTROL_MASK) {
3098                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
3099                 if (event->direction == GDK_SCROLL_UP ||
3100                     event->direction == GDK_SCROLL_LEFT) {
3101                         if (ev_view_can_zoom_in (view)) {
3102                                 ev_view_zoom_in (view);
3103                         }
3104                 } else {
3105                         if (ev_view_can_zoom_out (view)) {
3106                                 ev_view_zoom_out (view);
3107                         }
3108                 }
3109
3110                 return TRUE;
3111         }
3112
3113         view->jump_to_find_result = FALSE;
3114
3115         /* Shift+Wheel scrolls the in the perpendicular direction */
3116         if (state & GDK_SHIFT_MASK) {
3117                 if (event->direction == GDK_SCROLL_UP)
3118                         event->direction = GDK_SCROLL_LEFT;
3119                 else if (event->direction == GDK_SCROLL_LEFT)
3120                         event->direction = GDK_SCROLL_UP;
3121                 else if (event->direction == GDK_SCROLL_DOWN)
3122                         event->direction = GDK_SCROLL_RIGHT;
3123                 else if (event->direction == GDK_SCROLL_RIGHT)
3124                         event->direction = GDK_SCROLL_DOWN;
3125
3126                 event->state &= ~GDK_SHIFT_MASK;
3127                 state &= ~GDK_SHIFT_MASK;
3128         }
3129
3130         if (state == 0 && view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous) {
3131                 switch (event->direction) {
3132                         case GDK_SCROLL_DOWN:
3133                         case GDK_SCROLL_RIGHT:
3134                                 ev_view_next_page (view);
3135                                 break;
3136                         case GDK_SCROLL_UP:
3137                         case GDK_SCROLL_LEFT:
3138                                 ev_view_previous_page (view);
3139                                 break;
3140                 }
3141
3142                 return TRUE;
3143         }
3144
3145         return FALSE;
3146 }
3147
3148 static EvViewSelection *
3149 find_selection_for_page (EvView *view,
3150                          gint    page)
3151 {
3152         GList *list;
3153
3154         for (list = view->selection_info.selections; list != NULL; list = list->next) {
3155                 EvViewSelection *selection;
3156
3157                 selection = (EvViewSelection *) list->data;
3158
3159                 if (selection->page == page)
3160                         return selection;
3161         }
3162
3163         return NULL;
3164 }
3165
3166 static gboolean
3167 ev_view_expose_event (GtkWidget      *widget,
3168                       GdkEventExpose *event)
3169 {
3170         EvView    *view = EV_VIEW (widget);
3171         GdkWindow *bin_window;
3172         cairo_t   *cr;
3173         gint       i;
3174
3175         if (view->loading) {
3176                 show_loading_window (view);
3177         } else if (view->loading_window &&
3178                    gtk_widget_get_visible (view->loading_window)) {
3179                 ev_view_loading_window_move (view);
3180         }
3181
3182         if (view->document == NULL)
3183                 return FALSE;
3184
3185         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3186         cr = gdk_cairo_create (bin_window);
3187
3188         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3189                 GdkRectangle page_area;
3190                 GtkBorder border;
3191                 gboolean page_ready = TRUE;
3192
3193                 if (!ev_view_get_page_extents (view, i, &page_area, &border))
3194                         continue;
3195
3196                 page_area.x -= view->scroll_x;
3197                 page_area.y -= view->scroll_y;
3198
3199                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
3200
3201                 if (page_ready && view->find_pages && view->highlight_find_results)
3202                         highlight_find_results (view, i);
3203                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3204                         show_annotation_windows (view, i);
3205                 if (page_ready && view->focus_annotation)
3206                         focus_annotation (view, i, &event->area);
3207                 if (page_ready && view->synctex_result)
3208                         highlight_forward_search_results (view, i);
3209         }
3210
3211         cairo_destroy (cr);
3212
3213         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3214                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3215
3216         return FALSE;
3217 }
3218
3219 static gboolean
3220 ev_view_do_popup_menu (EvView *view,
3221                        gdouble x,
3222                        gdouble y)
3223 {
3224         GList        *items = NULL;
3225         EvLink       *link;
3226         EvImage      *image;
3227         EvAnnotation *annot;
3228
3229         image = ev_view_get_image_at_location (view, x, y);
3230         if (image)
3231                 items = g_list_prepend (items, image);
3232
3233         link = ev_view_get_link_at_location (view, x, y);
3234         if (link)
3235                 items = g_list_prepend (items, link);
3236
3237         annot = ev_view_get_annotation_at_location (view, x, y);
3238         if (annot)
3239                 items = g_list_prepend (items, annot);
3240
3241         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, items);
3242
3243         g_list_free (items);
3244
3245         return TRUE;
3246 }
3247
3248 static gboolean
3249 ev_view_popup_menu (GtkWidget *widget)
3250 {
3251         gint x, y;
3252
3253         gtk_widget_get_pointer (widget, &x, &y);
3254         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3255 }
3256
3257 static void
3258 get_link_area (EvView       *view,
3259                gint          x,
3260                gint          y,
3261                EvLink       *link,
3262                GdkRectangle *area)
3263 {
3264         EvMappingList *link_mapping;
3265         gint           page;
3266         gint           x_offset = 0, y_offset = 0;
3267
3268         x += view->scroll_x;
3269         y += view->scroll_y;
3270
3271         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3272
3273         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
3274         ev_view_get_area_from_mapping (view, page,
3275                                        link_mapping,
3276                                        link, area);
3277 }
3278
3279 static void
3280 get_annot_area (EvView       *view,
3281                gint          x,
3282                gint          y,
3283                EvAnnotation *annot,
3284                GdkRectangle *area)
3285 {
3286         EvMappingList *annot_mapping;
3287         gint           page;
3288         gint           x_offset = 0, y_offset = 0;
3289
3290         x += view->scroll_x;
3291         y += view->scroll_y;
3292
3293         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3294
3295         annot_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
3296         ev_view_get_area_from_mapping (view, page,
3297                                        annot_mapping,
3298                                        annot, area);
3299 }
3300
3301 static gboolean
3302 ev_view_query_tooltip (GtkWidget  *widget,
3303                        gint        x,
3304                        gint        y,
3305                        gboolean    keyboard_tip,
3306                        GtkTooltip *tooltip)
3307 {
3308         EvView       *view = EV_VIEW (widget);
3309         EvLink       *link;
3310         EvAnnotation *annot;
3311         gchar        *text;
3312
3313         annot = ev_view_get_annotation_at_location (view, x, y);
3314         if (annot && annot->contents) {
3315                 GdkRectangle annot_area;
3316
3317                 get_annot_area (view, x, y, annot, &annot_area);
3318                 gtk_tooltip_set_text (tooltip, annot->contents);
3319                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
3320
3321                 return TRUE;
3322         }
3323
3324         link = ev_view_get_link_at_location (view, x, y);
3325         if (!link)
3326                 return FALSE;
3327
3328         text = tip_from_link (view, link);
3329         if (text && g_utf8_validate (text, -1, NULL)) {
3330                 GdkRectangle link_area;
3331
3332                 get_link_area (view, x, y, link, &link_area);
3333                 gtk_tooltip_set_text (tooltip, text);
3334                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3335         }
3336         g_free (text);
3337
3338         return TRUE;
3339 }
3340
3341 static void
3342 start_selection_for_event (EvView         *view,
3343                            GdkEventButton *event)
3344 {
3345         clear_selection (view);
3346
3347         view->selection_info.start.x = event->x + view->scroll_x;
3348         view->selection_info.start.y = event->y + view->scroll_y;
3349
3350         switch (event->type) {
3351                 case GDK_2BUTTON_PRESS:
3352                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3353                         break;
3354                 case GDK_3BUTTON_PRESS:
3355                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3356                         break;
3357                 default:
3358                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3359                         return;
3360         }
3361
3362         /* In case of WORD or LINE, compute selections now */
3363         compute_selections (view,
3364                             view->selection_info.style,
3365                             &(view->selection_info.start),
3366                             &(view->selection_info.start));
3367 }
3368
3369 static gboolean
3370 ev_view_button_press_event (GtkWidget      *widget,
3371                             GdkEventButton *event)
3372 {
3373         EvView *view = EV_VIEW (widget);
3374
3375         if (!view->document)
3376                 return FALSE;
3377
3378         if (!gtk_widget_has_focus (widget)) {
3379                 gtk_widget_grab_focus (widget);
3380         }
3381
3382         if (view->window_child_focus) {
3383                 EvAnnotationWindow *window;
3384                 EvAnnotation       *annot;
3385
3386                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3387                 annot = ev_annotation_window_get_annotation (window);
3388                 ev_annotation_window_ungrab_focus (window);
3389                 ev_view_annotation_save (view, annot);
3390                 view->window_child_focus = NULL;
3391         }
3392
3393         view->pressed_button = event->button;
3394         view->selection_info.in_drag = FALSE;
3395
3396         if (view->scroll_info.autoscrolling)
3397                 return TRUE;
3398
3399         switch (event->button) {
3400                 case 1: {
3401                         EvImage *image;
3402                         EvAnnotation *annot;
3403                         EvFormField *field;
3404
3405                         if (event->state & GDK_CONTROL_MASK)
3406                                 return ev_view_synctex_backward_search (view, event->x , event->y);
3407
3408                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3409                                 if (event->type == GDK_3BUTTON_PRESS) {
3410                                         start_selection_for_event (view, event);
3411                                 } else if (location_in_selected_text (view,
3412                                                                event->x + view->scroll_x,
3413                                                                event->y + view->scroll_y)) {
3414                                         view->selection_info.in_drag = TRUE;
3415                                 } else {
3416                                         start_selection_for_event (view, event);
3417                                 }
3418
3419                                 gtk_widget_queue_draw (widget);
3420                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3421                                 ev_view_handle_annotation (view, annot, event->x, event->y, event->time);
3422                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3423                                 ev_view_remove_all (view);
3424                                 ev_view_handle_form_field (view, field, event->x, event->y);
3425                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3426                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3427                                 if (view->image_dnd_info.image)
3428                                         g_object_unref (view->image_dnd_info.image);
3429                                 view->image_dnd_info.image = g_object_ref (image);
3430                                 view->image_dnd_info.in_drag = TRUE;
3431
3432                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3433                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3434                         } else {
3435                                 ev_view_remove_all (view);
3436
3437                                 if (view->synctex_result) {
3438                                         g_free (view->synctex_result);
3439                                         view->synctex_result = NULL;
3440                                         gtk_widget_queue_draw (widget);
3441                                 }
3442
3443                                 if (view->focus_annotation)
3444                                         view->focus_annotation = NULL;
3445
3446                                 if (EV_IS_SELECTION (view->document))
3447                                         start_selection_for_event (view, event);
3448                         }
3449                 }
3450                         return TRUE;
3451                 case 2:
3452                         /* use root coordinates as reference point because
3453                          * scrolling changes window relative coordinates */
3454                         view->drag_info.start.x = event->x_root;
3455                         view->drag_info.start.y = event->y_root;
3456                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3457                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3458
3459                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3460
3461                         return TRUE;
3462                 case 3:
3463                         view->scroll_info.start_y = event->y;
3464                         return ev_view_do_popup_menu (view, event->x, event->y);
3465         }
3466
3467         return FALSE;
3468 }
3469
3470 static void
3471 ev_view_remove_all (EvView *view)
3472 {
3473         GList *children, *child;
3474
3475         children = gtk_container_get_children (GTK_CONTAINER (view));
3476         for (child = children; child && child->data; child = g_list_next (child)) {
3477                 gtk_container_remove (GTK_CONTAINER (view),
3478                                       GTK_WIDGET (child->data));
3479         }
3480         g_list_free (children);
3481 }
3482
3483 /*** Drag and Drop ***/
3484 static void
3485 ev_view_drag_data_get (GtkWidget        *widget,
3486                        GdkDragContext   *context,
3487                        GtkSelectionData *selection_data,
3488                        guint             info,
3489                        guint             time)
3490 {
3491         EvView *view = EV_VIEW (widget);
3492
3493         switch (info) {
3494                 case TARGET_DND_TEXT:
3495                         if (EV_IS_SELECTION (view->document) &&
3496                             view->selection_info.selections) {
3497                                 gchar *text;
3498
3499                                 text = get_selected_text (view);
3500                                 gtk_selection_data_set_text (selection_data,
3501                                                              text,
3502                                                              strlen (text));
3503                                 g_free (text);
3504                         }
3505                         break;
3506                 case TARGET_DND_IMAGE:
3507                         if (view->image_dnd_info.image) {
3508                                 GdkPixbuf *pixbuf;
3509
3510                                 ev_document_doc_mutex_lock ();
3511                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3512                                                                        view->image_dnd_info.image);
3513                                 ev_document_doc_mutex_unlock ();
3514
3515                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3516                                 g_object_unref (pixbuf);
3517                         }
3518                         break;
3519                 case TARGET_DND_URI:
3520                         if (view->image_dnd_info.image) {
3521                                 GdkPixbuf   *pixbuf;
3522                                 const gchar *tmp_uri;
3523                                 gchar       *uris[2];
3524
3525                                 ev_document_doc_mutex_lock ();
3526                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3527                                                                        view->image_dnd_info.image);
3528                                 ev_document_doc_mutex_unlock ();
3529
3530                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3531                                 g_object_unref (pixbuf);
3532
3533                                 uris[0] = (gchar *)tmp_uri;
3534                                 uris[1] = NULL;
3535                                 gtk_selection_data_set_uris (selection_data, uris);
3536                         }
3537         }
3538 }
3539
3540 static gboolean
3541 ev_view_drag_motion (GtkWidget      *widget,
3542                      GdkDragContext *context,
3543                      gint            x,
3544                      gint            y,
3545                      guint           time)
3546 {
3547         if (gtk_drag_get_source_widget (context) == widget)
3548                 gdk_drag_status (context, 0, time);
3549         else
3550                 gdk_drag_status (context, gdk_drag_context_get_suggested_action (context), time);
3551
3552         return TRUE;
3553 }
3554
3555 static gboolean
3556 selection_update_idle_cb (EvView *view)
3557 {
3558         compute_selections (view,
3559                             view->selection_info.style,
3560                             &view->selection_info.start,
3561                             &view->motion);
3562         view->selection_update_id = 0;
3563         return FALSE;
3564 }
3565
3566 static gboolean
3567 selection_scroll_timeout_cb (EvView *view)
3568 {
3569         gint x, y, shift = 0;
3570         GtkWidget *widget = GTK_WIDGET (view);
3571         GtkAllocation allocation;
3572
3573         gtk_widget_get_allocation (widget, &allocation);
3574         gtk_widget_get_pointer (widget, &x, &y);
3575
3576         if (y > allocation.height) {
3577                 shift = (y - allocation.height) / 2;
3578         } else if (y < 0) {
3579                 shift = y / 2;
3580         }
3581
3582         if (shift)
3583                 gtk_adjustment_set_value (view->vadjustment,
3584                                           CLAMP (gtk_adjustment_get_value (view->vadjustment) + shift,
3585                                                  gtk_adjustment_get_lower (view->vadjustment),
3586                                                  gtk_adjustment_get_upper (view->vadjustment) -
3587                                                  gtk_adjustment_get_page_size (view->vadjustment)));
3588
3589         if (x > allocation.width) {
3590                 shift = (x - allocation.width) / 2;
3591         } else if (x < 0) {
3592                 shift = x / 2;
3593         }
3594
3595         if (shift)
3596                 gtk_adjustment_set_value (view->hadjustment,
3597                                           CLAMP (gtk_adjustment_get_value (view->hadjustment) + shift,
3598                                                  gtk_adjustment_get_lower (view->hadjustment),
3599                                                  gtk_adjustment_get_upper (view->hadjustment) -
3600                                                  gtk_adjustment_get_page_size (view->hadjustment)));
3601
3602         return TRUE;
3603 }
3604
3605 static gboolean
3606 ev_view_drag_update_momentum (EvView *view)
3607 {
3608         int i;
3609         if (!view->drag_info.in_drag)
3610                 return FALSE;
3611
3612         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3613                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3614                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3615         }
3616
3617         /* Momentum is a moving average of 10ms granularity over
3618          * the last 100ms with each 10ms stored in buffer.
3619          */
3620
3621         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3622         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3623
3624         return TRUE;
3625 }
3626
3627 static gboolean
3628 ev_view_scroll_drag_release (EvView *view)
3629 {
3630         gdouble dhadj_value, dvadj_value;
3631         gdouble oldhadjustment, oldvadjustment;
3632         gdouble h_page_size, v_page_size;
3633         gdouble h_upper, v_upper;
3634         GtkAllocation allocation;
3635
3636         view->drag_info.momentum.x /= 1.2;
3637         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3638
3639         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
3640
3641         h_page_size = gtk_adjustment_get_page_size (view->hadjustment);
3642         v_page_size = gtk_adjustment_get_page_size (view->vadjustment);
3643
3644         dhadj_value = h_page_size *
3645                       (gdouble)view->drag_info.momentum.x / allocation.width;
3646         dvadj_value = v_page_size *
3647                       (gdouble)view->drag_info.momentum.y / allocation.height;
3648
3649         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3650         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3651
3652         h_upper = gtk_adjustment_get_upper (view->hadjustment);
3653         v_upper = gtk_adjustment_get_upper (view->vadjustment);
3654
3655         /* When we reach the edges, we need either to absorb some momentum and bounce by
3656          * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3657         if (((oldhadjustment + dhadj_value) > (h_upper - h_page_size)) ||
3658             ((oldhadjustment + dhadj_value) < 0))
3659                 view->drag_info.momentum.x = 0;
3660         if (((oldvadjustment + dvadj_value) > (v_upper - v_page_size)) ||
3661             ((oldvadjustment + dvadj_value) < 0))
3662                 view->drag_info.momentum.y = 0;
3663
3664         gtk_adjustment_set_value (view->hadjustment,
3665                                   MIN (oldhadjustment + dhadj_value,
3666                                        h_upper - h_page_size));
3667         gtk_adjustment_set_value (view->vadjustment,
3668                                   MIN (oldvadjustment + dvadj_value,
3669                                        v_upper - v_page_size));
3670
3671         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3672             ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3673                 return FALSE;
3674         else
3675                 return TRUE;
3676 }
3677
3678 static gboolean
3679 ev_view_motion_notify_event (GtkWidget      *widget,
3680                              GdkEventMotion *event)
3681 {
3682         EvView    *view = EV_VIEW (widget);
3683         GdkWindow *bin_window;
3684         gint       x, y;
3685
3686         if (!view->document)
3687                 return FALSE;
3688
3689         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3690
3691         if (event->is_hint || event->window != bin_window) {
3692             gtk_widget_get_pointer (widget, &x, &y);
3693         } else {
3694             x = event->x;
3695             y = event->y;
3696         }
3697
3698         if (view->scroll_info.autoscrolling) {
3699                 view->scroll_info.last_y = y;
3700                 return TRUE;
3701         }
3702
3703         if (view->selection_info.in_drag) {
3704                 if (gtk_drag_check_threshold (widget,
3705                                               view->selection_info.start.x,
3706                                               view->selection_info.start.y,
3707                                               x, y)) {
3708                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3709
3710                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3711
3712                         gtk_drag_begin (widget, target_list,
3713                                         GDK_ACTION_COPY,
3714                                         1, (GdkEvent *)event);
3715
3716                         view->selection_info.in_drag = FALSE;
3717
3718                         gtk_target_list_unref (target_list);
3719
3720                         return TRUE;
3721                 }
3722         } else if (view->image_dnd_info.in_drag) {
3723                 if (gtk_drag_check_threshold (widget,
3724                                               view->selection_info.start.x,
3725                                               view->selection_info.start.y,
3726                                               x, y)) {
3727                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3728
3729                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3730                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3731
3732                         gtk_drag_begin (widget, target_list,
3733                                         GDK_ACTION_COPY,
3734                                         1, (GdkEvent *)event);
3735
3736                         view->image_dnd_info.in_drag = FALSE;
3737
3738                         gtk_target_list_unref (target_list);
3739
3740                         return TRUE;
3741                 }
3742         }
3743
3744         switch (view->pressed_button) {
3745         case 1:
3746                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3747                  * documents only.
3748                  */
3749                 if (view->rotation != 0)
3750                         return FALSE;
3751
3752                 /* Schedule timeout to scroll during selection and additionally
3753                  * scroll once to allow arbitrary speed. */
3754                 if (!view->selection_scroll_id)
3755                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3756                                                                (GSourceFunc)selection_scroll_timeout_cb,
3757                                                                view);
3758                 else
3759                     selection_scroll_timeout_cb (view);
3760
3761                 view->selection_info.in_selection = TRUE;
3762                 view->motion.x = x + view->scroll_x;
3763                 view->motion.y = y + view->scroll_y;
3764
3765                 /* Queue an idle to handle the motion.  We do this because
3766                  * handling any selection events in the motion could be slower
3767                  * than new motion events reach us.  We always put it in the
3768                  * idle to make sure we catch up and don't visibly lag the
3769                  * mouse. */
3770                 if (!view->selection_update_id)
3771                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3772
3773                 return TRUE;
3774         case 2:
3775                 if (!view->drag_info.in_drag) {
3776                         gboolean start;
3777                         int i;
3778
3779                         start = gtk_drag_check_threshold (widget,
3780                                                           view->drag_info.start.x,
3781                                                           view->drag_info.start.y,
3782                                                           event->x_root,
3783                                                           event->y_root);
3784                         view->drag_info.in_drag = start;
3785                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3786                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3787                         /* Set 100 to choose how long it takes to build up momentum */
3788                         /* Clear out previous momentum info: */
3789                         for (i = 0; i < DRAG_HISTORY; i++) {
3790                                 view->drag_info.buffer[i].x = event->x;
3791                                 view->drag_info.buffer[i].y = event->y;
3792                         }
3793                         view->drag_info.momentum.x = 0;
3794                         view->drag_info.momentum.y = 0;
3795                 }
3796
3797                 if (view->drag_info.in_drag) {
3798                         int dx, dy;
3799                         gdouble dhadj_value, dvadj_value;
3800                         GtkAllocation allocation;
3801
3802                         view->drag_info.buffer[0].x = event->x;
3803                         view->drag_info.buffer[0].y = event->y;
3804
3805                         dx = event->x_root - view->drag_info.start.x;
3806                         dy = event->y_root - view->drag_info.start.y;
3807
3808                         gtk_widget_get_allocation (widget, &allocation);
3809
3810                         dhadj_value = gtk_adjustment_get_page_size (view->hadjustment) *
3811                                       (gdouble)dx / allocation.width;
3812                         dvadj_value = gtk_adjustment_get_page_size (view->vadjustment) *
3813                                       (gdouble)dy / allocation.height;
3814
3815                         /* clamp scrolling to visible area */
3816                         gtk_adjustment_set_value (view->hadjustment,
3817                                                   MIN (view->drag_info.hadj - dhadj_value,
3818                                                        gtk_adjustment_get_upper (view->hadjustment) -
3819                                                        gtk_adjustment_get_page_size (view->hadjustment)));
3820                         gtk_adjustment_set_value (view->vadjustment,
3821                                                   MIN (view->drag_info.vadj - dvadj_value,
3822                                                        gtk_adjustment_get_upper (view->vadjustment) -
3823                                                        gtk_adjustment_get_page_size (view->vadjustment)));
3824
3825                         return TRUE;
3826                 }
3827
3828                 break;
3829         default:
3830                 ev_view_handle_cursor_over_xy (view, x, y);
3831         }
3832
3833         return FALSE;
3834 }
3835
3836 static gboolean
3837 ev_view_button_release_event (GtkWidget      *widget,
3838                               GdkEventButton *event)
3839 {
3840         EvView *view = EV_VIEW (widget);
3841         EvLink *link = NULL;
3842
3843         view->image_dnd_info.in_drag = FALSE;
3844
3845         if (view->scroll_info.autoscrolling) {
3846                 ev_view_autoscroll_stop (view);
3847                 view->pressed_button = -1;
3848
3849                 return TRUE;
3850         }
3851
3852         if (view->drag_info.in_drag) {
3853                 view->drag_info.release_timeout_id =
3854                         g_timeout_add (20,
3855                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3856         }
3857
3858         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3859                 link = ev_view_get_link_at_location (view, event->x, event->y);
3860         }
3861
3862         view->drag_info.in_drag = FALSE;
3863
3864         if (view->pressed_button == 2) {
3865                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3866         }
3867
3868         view->pressed_button = -1;
3869
3870         if (view->selection_scroll_id) {
3871             g_source_remove (view->selection_scroll_id);
3872             view->selection_scroll_id = 0;
3873         }
3874         if (view->selection_update_id) {
3875             g_source_remove (view->selection_update_id);
3876             view->selection_update_id = 0;
3877         }
3878
3879         if (view->selection_info.selections) {
3880                 clear_link_selected (view);
3881                 ev_view_update_primary_selection (view);
3882
3883                 if (view->selection_info.in_drag) {
3884                         clear_selection (view);
3885                         gtk_widget_queue_draw (widget);
3886                 }
3887
3888                 view->selection_info.in_drag = FALSE;
3889         } else if (link) {
3890                 if (event->button == 2) {
3891                         EvLinkAction    *action;
3892                         EvLinkActionType type;
3893
3894                         action = ev_link_get_action (link);
3895                         if (!action)
3896                                 return FALSE;
3897
3898                         type = ev_link_action_get_action_type (action);
3899                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3900                                 g_signal_emit (view,
3901                                                signals[SIGNAL_EXTERNAL_LINK],
3902                                                0, action);
3903                         }
3904                 } else {
3905                         ev_view_handle_link (view, link);
3906                 }
3907         }
3908
3909         return FALSE;
3910 }
3911
3912 static gboolean
3913 ev_view_key_press_event (GtkWidget   *widget,
3914                          GdkEventKey *event)
3915 {
3916         EvView *view = EV_VIEW (widget);
3917
3918         if (!view->document)
3919                 return FALSE;
3920
3921         if (!gtk_widget_has_focus (widget)) {
3922                 /* Forward key events to current focused window child */
3923                 if (view->window_child_focus) {
3924                         GdkEventKey *new_event;
3925                         gboolean     handled;
3926
3927                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
3928                         g_object_unref (new_event->window);
3929                         new_event->window = gtk_widget_get_window (view->window_child_focus->window);
3930                         if (new_event->window)
3931                                 g_object_ref (new_event->window);
3932                         gtk_widget_realize (view->window_child_focus->window);
3933                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
3934                         gdk_event_free ((GdkEvent *)new_event);
3935
3936                         return handled;
3937                 }
3938
3939                 return FALSE;
3940         }
3941
3942         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3943 }
3944
3945 static gint
3946 ev_view_focus_in (GtkWidget     *widget,
3947                   GdkEventFocus *event)
3948 {
3949         if (EV_VIEW (widget)->pixbuf_cache)
3950                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3951         gtk_widget_queue_draw (widget);
3952
3953         return FALSE;
3954 }
3955
3956 static gint
3957 ev_view_focus_out (GtkWidget     *widget,
3958                    GdkEventFocus *event)
3959 {
3960         if (EV_VIEW (widget)->pixbuf_cache)
3961                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3962         gtk_widget_queue_draw (widget);
3963
3964         return FALSE;
3965 }
3966
3967 static gboolean
3968 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3969 {
3970         EvView *view = EV_VIEW (widget);
3971
3972         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
3973                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3974
3975         return FALSE;
3976 }
3977
3978 static gboolean
3979 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3980 {
3981         EvView *view = EV_VIEW (widget);
3982
3983         ev_view_handle_cursor_over_xy (view, event->x, event->y);
3984
3985         return FALSE;
3986 }
3987
3988 static void
3989 ev_view_style_set (GtkWidget *widget,
3990                    GtkStyle  *old_style)
3991 {
3992         if (EV_VIEW (widget)->pixbuf_cache)
3993                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3994
3995         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
3996 }
3997
3998 /*** Drawing ***/
3999
4000 static void
4001 draw_rubberband (EvView             *view,
4002                  GdkWindow          *window,
4003                  const GdkRectangle *rect,
4004                  gdouble             alpha)
4005 {
4006         GtkStyle *style;
4007         GdkColor *fill_color_gdk;
4008         gdouble   r, g, b;
4009         cairo_t  *cr;
4010
4011         style = gtk_widget_get_style (GTK_WIDGET (view));
4012         fill_color_gdk = gdk_color_copy (&style->base[GTK_STATE_SELECTED]);
4013         r = fill_color_gdk->red / 65535.;
4014         g = fill_color_gdk->green / 65535.;
4015         b = fill_color_gdk->blue / 65535.;
4016
4017         cr = gdk_cairo_create (window);
4018
4019         cairo_set_source_rgba (cr, r, g, b, alpha);
4020         cairo_rectangle (cr,
4021                          rect->x - view->scroll_x,
4022                          rect->y - view->scroll_y,
4023                          rect->width, rect->height);
4024         cairo_fill_preserve (cr);
4025
4026         cairo_set_line_width (cr, 0.5);
4027         cairo_set_source_rgb (cr, r, g, b);
4028         cairo_stroke (cr);
4029
4030         cairo_destroy (cr);
4031
4032         gdk_color_free (fill_color_gdk);
4033 }
4034
4035
4036 static void
4037 highlight_find_results (EvView *view, int page)
4038 {
4039         gint       i, n_results = 0;
4040         GdkWindow *bin_window;
4041
4042         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4043
4044         n_results = ev_view_find_get_n_results (view, page);
4045
4046         for (i = 0; i < n_results; i++) {
4047                 EvRectangle *rectangle;
4048                 GdkRectangle view_rectangle;
4049                 gdouble      alpha;
4050
4051                 if (i == view->find_result && page == view->current_page) {
4052                         alpha = 0.6;
4053                 } else {
4054                         alpha = 0.3;
4055                 }
4056
4057                 rectangle = ev_view_find_get_result (view, page, i);
4058                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4059                 draw_rubberband (view, bin_window, &view_rectangle, alpha);
4060         }
4061 }
4062
4063 static void
4064 highlight_forward_search_results (EvView *view, int page)
4065 {
4066         GdkWindow   *bin_window;
4067         GdkRectangle rect;
4068         cairo_t     *cr;
4069         EvMapping   *mapping = view->synctex_result;
4070
4071         if (GPOINTER_TO_INT (mapping->data) != page)
4072                 return;
4073
4074         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4075         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4076
4077         cr = gdk_cairo_create (bin_window);
4078         cairo_set_source_rgb (cr, 1., 0., 0.);
4079         cairo_rectangle (cr,
4080                          rect.x - view->scroll_x,
4081                          rect.y - view->scroll_y,
4082                          rect.width, rect.height);
4083         cairo_stroke (cr);
4084         cairo_destroy (cr);
4085 }
4086
4087 static void
4088 focus_annotation (EvView       *view,
4089                   gint          page,
4090                   GdkRectangle *clip)
4091 {
4092         GtkWidget    *widget = GTK_WIDGET (view);
4093         GdkRectangle  rect;
4094         EvMapping    *mapping = view->focus_annotation;
4095         EvAnnotation *annot = (EvAnnotation *)mapping->data;
4096
4097         if (annot->page->index != page)
4098                 return;
4099
4100         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4101         gtk_paint_focus (gtk_widget_get_style (widget),
4102                          gtk_layout_get_bin_window (GTK_LAYOUT (view)),
4103                          gtk_widget_get_state (widget),
4104                          NULL, widget, NULL,
4105                          rect.x - view->scroll_x,
4106                          rect.y - view->scroll_y,
4107                          rect.width + 1, rect.height + 1);
4108 }
4109
4110 static void
4111 ev_view_loading_window_move (EvView *view)
4112 {
4113         GtkWidget       *widget = GTK_WIDGET (view);
4114         EvLoadingWindow *window = EV_LOADING_WINDOW (view->loading_window);
4115         gint             root_x, root_y;
4116         gint             window_width;
4117         GtkAllocation    allocation;
4118
4119         gtk_widget_get_allocation (widget, &allocation);
4120         gdk_window_get_origin (gtk_widget_get_window (widget), &root_x, &root_y);
4121         ev_loading_window_get_size (window, &window_width, NULL);
4122
4123         root_x += allocation.width - window_width - 10;
4124         root_y += 10;
4125
4126         ev_loading_window_move (window, root_x, root_y);
4127 }
4128
4129 static gboolean
4130 show_loading_window_cb (EvView *view)
4131 {
4132         if (!view->loading_window) {
4133                 GtkWindow *parent;
4134                 GdkScreen *screen;
4135
4136                 parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
4137                 view->loading_window = ev_loading_window_new (parent);
4138
4139                 /* Show the window off screen to get a valid size asap */
4140                 screen = gtk_widget_get_screen (GTK_WIDGET (view));
4141                 gtk_window_move (GTK_WINDOW (view->loading_window),
4142                                  gdk_screen_get_width (screen) + 1,
4143                                  gdk_screen_get_height (screen) + 1);
4144                 gtk_widget_show (view->loading_window);
4145         }
4146
4147         ev_view_loading_window_move (view);
4148
4149         gtk_widget_show (view->loading_window);
4150
4151         view->loading_timeout = 0;
4152
4153         return FALSE;
4154 }
4155
4156 static void
4157 show_loading_window (EvView *view)
4158 {
4159         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4160                 ev_view_loading_window_move (view);
4161                 return;
4162         }
4163
4164         if (!view->loading_timeout) {
4165                 view->loading_timeout =
4166                         g_timeout_add_full (G_PRIORITY_LOW,
4167                                             0.5, (GSourceFunc)show_loading_window_cb,
4168                                             view, NULL);
4169         }
4170 }
4171
4172 static void
4173 hide_loading_window (EvView *view)
4174 {
4175         if (view->loading_timeout) {
4176                 g_source_remove (view->loading_timeout);
4177                 view->loading_timeout = 0;
4178         }
4179
4180         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4181                 gtk_widget_hide (view->loading_window);
4182         }
4183 }
4184
4185 static void
4186 draw_one_page (EvView       *view,
4187                gint          page,
4188                cairo_t      *cr,
4189                GdkRectangle *page_area,
4190                GtkBorder    *border,
4191                GdkRectangle *expose_area,
4192                gboolean     *page_ready)
4193 {
4194         GdkWindow   *bin_window;
4195         GdkRectangle overlap;
4196         GdkRectangle real_page_area;
4197         gint         current_page;
4198         gboolean     inverted_colors;
4199
4200         g_assert (view->document);
4201
4202         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4203                 return;
4204
4205         /* Render the document itself */
4206         real_page_area = *page_area;
4207
4208         real_page_area.x += border->left;
4209         real_page_area.y += border->top;
4210         real_page_area.width -= (border->left + border->right);
4211         real_page_area.height -= (border->top + border->bottom);
4212         *page_ready = TRUE;
4213
4214         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4215         current_page = ev_document_model_get_page (view->model);
4216         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4217         ev_document_misc_paint_one_page (bin_window,
4218                                          GTK_WIDGET (view),
4219                                          page_area, border,
4220                                          page == current_page,
4221                                          inverted_colors);
4222
4223         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4224                 gint             width, height;
4225                 gint             page_width, page_height;
4226                 cairo_surface_t *page_surface = NULL;
4227                 gint             selection_width, selection_height;
4228                 cairo_surface_t *selection_surface = NULL;
4229
4230                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4231
4232                 if (!page_surface) {
4233                         if (page == current_page)
4234                                 show_loading_window (view);
4235
4236                         *page_ready = FALSE;
4237
4238                         return;
4239                 }
4240
4241                 if (page == current_page)
4242                         hide_loading_window (view);
4243
4244                 ev_view_get_page_size (view, page, &width, &height);
4245
4246                 page_width = cairo_image_surface_get_width (page_surface);
4247                 page_height = cairo_image_surface_get_height (page_surface);
4248
4249                 cairo_save (cr);
4250                 cairo_translate (cr, overlap.x, overlap.y);
4251
4252                 if (width != page_width || height != page_height) {
4253                         cairo_pattern_set_filter (cairo_get_source (cr),
4254                                                   CAIRO_FILTER_FAST);
4255                         cairo_scale (cr,
4256                                      (gdouble)width / page_width,
4257                                      (gdouble)height / page_height);
4258                 }
4259
4260                 cairo_surface_set_device_offset (page_surface,
4261                                                  overlap.x - real_page_area.x,
4262                                                  overlap.y - real_page_area.y);
4263                 cairo_set_source_surface (cr, page_surface, 0, 0);
4264                 cairo_paint (cr);
4265                 cairo_restore (cr);
4266
4267                 /* Get the selection pixbuf iff we have something to draw */
4268                 if (find_selection_for_page (view, page) &&
4269                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4270                         selection_surface =
4271                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4272                                                                        page,
4273                                                                        view->scale,
4274                                                                        NULL);
4275                 }
4276
4277                 if (!selection_surface) {
4278                         return;
4279                 }
4280
4281                 selection_width = cairo_image_surface_get_width (selection_surface);
4282                 selection_height = cairo_image_surface_get_height (selection_surface);
4283
4284                 cairo_save (cr);
4285                 cairo_translate (cr, overlap.x, overlap.y);
4286
4287                 if (width != selection_width || height != selection_height) {
4288                         cairo_pattern_set_filter (cairo_get_source (cr),
4289                                                   CAIRO_FILTER_FAST);
4290                         cairo_scale (cr,
4291                                      (gdouble)width / selection_width,
4292                                      (gdouble)height / selection_height);
4293                 }
4294
4295                 cairo_surface_set_device_offset (selection_surface,
4296                                                  overlap.x - real_page_area.x,
4297                                                  overlap.y - real_page_area.y);
4298
4299                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4300                 cairo_paint (cr);
4301                 cairo_restore (cr);
4302         }
4303 }
4304
4305 /*** GObject functions ***/
4306
4307 static void
4308 ev_view_finalize (GObject *object)
4309 {
4310         EvView *view = EV_VIEW (object);
4311
4312         clear_selection (view);
4313         clear_link_selected (view);
4314
4315         if (view->synctex_result) {
4316                 g_free (view->synctex_result);
4317                 view->synctex_result = NULL;
4318         }
4319
4320         if (view->image_dnd_info.image)
4321                 g_object_unref (view->image_dnd_info.image);
4322         view->image_dnd_info.image = NULL;
4323
4324         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4325 }
4326
4327 static void
4328 ev_view_destroy (GtkObject *object)
4329 {
4330         EvView *view = EV_VIEW (object);
4331
4332         if (view->model) {
4333                 g_object_unref (view->model);
4334                 view->model = NULL;
4335         }
4336
4337         if (view->pixbuf_cache) {
4338                 g_object_unref (view->pixbuf_cache);
4339                 view->pixbuf_cache = NULL;
4340         }
4341
4342         if (view->document) {
4343                 g_object_unref (view->document);
4344                 view->document = NULL;
4345         }
4346
4347         if (view->page_cache) {
4348                 g_object_unref (view->page_cache);
4349                 view->page_cache = NULL;
4350         }
4351
4352         ev_view_window_children_free (view);
4353
4354         if (view->selection_scroll_id) {
4355             g_source_remove (view->selection_scroll_id);
4356             view->selection_scroll_id = 0;
4357         }
4358
4359         if (view->selection_update_id) {
4360             g_source_remove (view->selection_update_id);
4361             view->selection_update_id = 0;
4362         }
4363
4364         if (view->scroll_info.timeout_id) {
4365             g_source_remove (view->scroll_info.timeout_id);
4366             view->scroll_info.timeout_id = 0;
4367         }
4368
4369         if (view->drag_info.drag_timeout_id) {
4370                 g_source_remove (view->drag_info.drag_timeout_id);
4371                 view->drag_info.drag_timeout_id = 0;
4372         }
4373
4374         if (view->drag_info.release_timeout_id) {
4375                 g_source_remove (view->drag_info.release_timeout_id);
4376                 view->drag_info.release_timeout_id = 0;
4377         }
4378
4379         if (view->loading_timeout) {
4380                 g_source_remove (view->loading_timeout);
4381                 view->loading_timeout = 0;
4382         }
4383
4384         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4385
4386         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4387 }
4388
4389 static AtkObject *
4390 ev_view_get_accessible (GtkWidget *widget)
4391 {
4392         static gboolean first_time = TRUE;
4393
4394         if (first_time) {
4395                 AtkObjectFactory *factory;
4396                 AtkRegistry *registry;
4397                 GType derived_type;
4398                 GType derived_atk_type;
4399
4400                 /*
4401                  * Figure out whether accessibility is enabled by looking at the
4402                  * type of the accessible object which would be created for
4403                  * the parent type of EvView.
4404                  */
4405                 derived_type = g_type_parent (EV_TYPE_VIEW);
4406
4407                 registry = atk_get_default_registry ();
4408                 factory = atk_registry_get_factory (registry,
4409                                                     derived_type);
4410                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4411                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE)) {
4412                         atk_registry_set_factory_type (registry,
4413                                                        EV_TYPE_VIEW,
4414                                                        ev_view_accessible_factory_get_type ());
4415                         EV_VIEW (widget)->a11y_enabled = TRUE;
4416                 }
4417                 first_time = FALSE;
4418         }
4419         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4420 }
4421
4422 static void
4423 ev_view_class_init (EvViewClass *class)
4424 {
4425         GObjectClass *object_class = G_OBJECT_CLASS (class);
4426         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4427         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4428         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4429         GtkBindingSet *binding_set;
4430
4431         object_class->finalize = ev_view_finalize;
4432
4433         widget_class->expose_event = ev_view_expose_event;
4434         widget_class->button_press_event = ev_view_button_press_event;
4435         widget_class->motion_notify_event = ev_view_motion_notify_event;
4436         widget_class->button_release_event = ev_view_button_release_event;
4437         widget_class->key_press_event = ev_view_key_press_event;
4438         widget_class->focus_in_event = ev_view_focus_in;
4439         widget_class->focus_out_event = ev_view_focus_out;
4440         widget_class->get_accessible = ev_view_get_accessible;
4441         widget_class->size_request = ev_view_size_request;
4442         widget_class->size_allocate = ev_view_size_allocate;
4443         widget_class->realize = ev_view_realize;
4444         widget_class->scroll_event = ev_view_scroll_event;
4445         widget_class->enter_notify_event = ev_view_enter_notify_event;
4446         widget_class->leave_notify_event = ev_view_leave_notify_event;
4447         widget_class->style_set = ev_view_style_set;
4448         widget_class->drag_data_get = ev_view_drag_data_get;
4449         widget_class->drag_motion = ev_view_drag_motion;
4450         widget_class->popup_menu = ev_view_popup_menu;
4451         widget_class->query_tooltip = ev_view_query_tooltip;
4452
4453         gtk_object_class->destroy = ev_view_destroy;
4454
4455         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4456
4457         class->binding_activated = ev_view_scroll;
4458
4459         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4460                          G_TYPE_FROM_CLASS (object_class),
4461                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4462                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4463                          NULL, NULL,
4464                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4465                          G_TYPE_NONE, 2,
4466                          GTK_TYPE_SCROLL_TYPE,
4467                          G_TYPE_BOOLEAN);
4468         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4469                          G_TYPE_FROM_CLASS (object_class),
4470                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4471                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4472                          NULL, NULL,
4473                          g_cclosure_marshal_VOID__OBJECT,
4474                          G_TYPE_NONE, 1,
4475                          G_TYPE_OBJECT);
4476         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4477                          G_TYPE_FROM_CLASS (object_class),
4478                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4479                          G_STRUCT_OFFSET (EvViewClass, external_link),
4480                          NULL, NULL,
4481                          g_cclosure_marshal_VOID__OBJECT,
4482                          G_TYPE_NONE, 1,
4483                          G_TYPE_OBJECT);
4484         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4485                          G_TYPE_FROM_CLASS (object_class),
4486                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4487                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4488                          NULL, NULL,
4489                          g_cclosure_marshal_VOID__POINTER,
4490                          G_TYPE_NONE, 1,
4491                          G_TYPE_POINTER);
4492         signals[SIGNAL_SELECTION_CHANGED] = g_signal_new ("selection-changed",
4493                          G_TYPE_FROM_CLASS (object_class),
4494                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4495                          G_STRUCT_OFFSET (EvViewClass, selection_changed),
4496                          NULL, NULL,
4497                          g_cclosure_marshal_VOID__VOID,
4498                          G_TYPE_NONE, 0,
4499                          G_TYPE_NONE);
4500         signals[SIGNAL_SYNC_SOURCE] = g_signal_new ("sync-source",
4501                          G_TYPE_FROM_CLASS (object_class),
4502                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4503                          G_STRUCT_OFFSET (EvViewClass, sync_source),
4504                          NULL, NULL,
4505                          g_cclosure_marshal_VOID__POINTER,
4506                          G_TYPE_NONE, 1,
4507                          G_TYPE_POINTER);
4508
4509         binding_set = gtk_binding_set_by_class (class);
4510
4511         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4512         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4513         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4514         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4515         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4516         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4517         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4518         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4519         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4520                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4521         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4522                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4523         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4524                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4525         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4526                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4527
4528 }
4529
4530 static void
4531 ev_view_init (EvView *view)
4532 {
4533         gtk_widget_set_can_focus (GTK_WIDGET (view), TRUE);
4534
4535         view->start_page = -1;
4536         view->end_page = -1;
4537         view->spacing = 5;
4538         view->scale = 1.0;
4539         view->current_page = 0;
4540         view->pressed_button = -1;
4541         view->cursor = EV_VIEW_CURSOR_NORMAL;
4542         view->drag_info.in_drag = FALSE;
4543         view->scroll_info.autoscrolling = FALSE;
4544         view->selection_info.selections = NULL;
4545         view->selection_info.in_selection = FALSE;
4546         view->selection_info.in_drag = FALSE;
4547         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4548         view->continuous = TRUE;
4549         view->dual_page = FALSE;
4550         view->fullscreen = FALSE;
4551         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4552         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4553         view->jump_to_find_result = TRUE;
4554         view->highlight_find_results = FALSE;
4555
4556         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4557         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4558 }
4559
4560 /*** Callbacks ***/
4561
4562 static void
4563 ev_view_change_page (EvView *view,
4564                      gint    new_page)
4565 {
4566         gint x, y;
4567
4568         view->current_page = new_page;
4569         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4570
4571         hide_loading_window (view);
4572
4573         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4574         ev_view_handle_cursor_over_xy (view, x, y);
4575
4576         gtk_widget_queue_resize (GTK_WIDGET (view));
4577 }
4578
4579 static void
4580 job_finished_cb (EvPixbufCache  *pixbuf_cache,
4581                  cairo_region_t *region,
4582                  EvView         *view)
4583 {
4584         if (region) {
4585                 GdkWindow *bin_window;
4586
4587                 bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4588                 gdk_window_invalidate_region (bin_window, region, TRUE);
4589         } else {
4590                 gtk_widget_queue_draw (GTK_WIDGET (view));
4591         }
4592 }
4593
4594 static void
4595 ev_view_page_changed_cb (EvDocumentModel *model,
4596                          gint             old_page,
4597                          gint             new_page,
4598                          EvView          *view)
4599 {
4600         if (!view->document)
4601                 return;
4602
4603         if (view->current_page != new_page) {
4604                 ev_view_change_page (view, new_page);
4605         } else {
4606                 gtk_widget_queue_draw (GTK_WIDGET (view));
4607         }
4608
4609         view->find_result = 0;
4610 }
4611
4612 static void
4613 on_adjustment_value_changed (GtkAdjustment *adjustment,
4614                              EvView        *view)
4615 {
4616         int dx = 0, dy = 0;
4617         gint x, y;
4618         gint value;
4619         GList *children, *l;
4620
4621         if (!gtk_widget_get_realized (GTK_WIDGET (view)))
4622                 return;
4623
4624         if (view->hadjustment) {
4625                 value = (gint) gtk_adjustment_get_value (view->hadjustment);
4626                 dx = view->scroll_x - value;
4627                 view->scroll_x = value;
4628         } else {
4629                 view->scroll_x = 0;
4630         }
4631
4632         if (view->vadjustment) {
4633                 value = (gint) gtk_adjustment_get_value (view->vadjustment);
4634                 dy = view->scroll_y - value;
4635                 view->scroll_y = value;
4636         } else {
4637                 view->scroll_y = 0;
4638         }
4639
4640         children = gtk_container_get_children (GTK_CONTAINER (view));
4641         for (l = children; l && l->data; l = g_list_next (l)) {
4642                 gint       child_x, child_y;
4643                 GtkWidget *child = (GtkWidget *)l->data;
4644
4645                 gtk_container_child_get (GTK_CONTAINER (view),
4646                                          child,
4647                                          "x", &child_x,
4648                                          "y", &child_y,
4649                                          NULL);
4650                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4651         }
4652         g_list_free (children);
4653
4654         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4655                 EvViewWindowChild *child;
4656
4657                 child = (EvViewWindowChild *)l->data;
4658
4659                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4660         }
4661
4662         if (view->pending_resize) {
4663                 gtk_widget_queue_draw (GTK_WIDGET (view));
4664         } else {
4665                 GdkWindow *bin_window;
4666
4667                 bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4668                 gdk_window_scroll (bin_window, dx, dy);
4669         }
4670
4671         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4672         ev_view_handle_cursor_over_xy (view, x, y);
4673
4674         if (view->document)
4675                 view_update_range_and_current_page (view);
4676 }
4677
4678 GtkWidget*
4679 ev_view_new (void)
4680 {
4681         GtkWidget *view;
4682
4683         view = g_object_new (EV_TYPE_VIEW, NULL);
4684
4685         return view;
4686 }
4687
4688 static void
4689 setup_caches (EvView *view)
4690 {
4691         gboolean inverted_colors;
4692
4693         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
4694         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->model, view->pixbuf_cache_size);
4695         view->page_cache = ev_page_cache_new (view->document);
4696         if (view->a11y_enabled) {
4697                 EvJobPageDataFlags flags = ev_page_cache_get_flags (view->page_cache);
4698
4699                 ev_page_cache_set_flags (view->page_cache,
4700                                          flags |
4701                                          EV_PAGE_DATA_INCLUDE_TEXT_LAYOUT |
4702                                          EV_PAGE_DATA_INCLUDE_TEXT);
4703         }
4704         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4705         ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
4706         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4707 }
4708
4709 static void
4710 clear_caches (EvView *view)
4711 {
4712         if (view->pixbuf_cache) {
4713                 g_object_unref (view->pixbuf_cache);
4714                 view->pixbuf_cache = NULL;
4715         }
4716
4717         if (view->page_cache) {
4718                 g_object_unref (view->page_cache);
4719                 view->page_cache = NULL;
4720         }
4721 }
4722
4723 /**
4724  * ev_view_set_page_cache_size:
4725  * @view:
4726  * @cache_size:
4727  *
4728  * Sets the maximum size in bytes that will be used to cache
4729  * rendered pages. Use 0 to disable caching rendered pages.
4730  *
4731  * Note that this limit doesn't affect the current visible page range,
4732  * which will always be rendered. In order to limit the total memory used
4733  * you have to use ev_document_model_set_max_scale() too.
4734  *
4735  */
4736 void
4737 ev_view_set_page_cache_size (EvView *view,
4738                              gsize   cache_size)
4739 {
4740         if (view->pixbuf_cache_size == cache_size)
4741                 return;
4742
4743         view->pixbuf_cache_size = cache_size;
4744         if (view->pixbuf_cache)
4745                 ev_pixbuf_cache_set_max_size (view->pixbuf_cache, cache_size);
4746 }
4747
4748 void
4749 ev_view_set_loading (EvView       *view,
4750                      gboolean      loading)
4751 {
4752         if (view->loading && !loading)
4753                 hide_loading_window (view);
4754         view->loading = loading;
4755         gtk_widget_queue_draw (GTK_WIDGET (view));
4756 }
4757
4758 static gboolean
4759 ev_view_autoscroll_cb (EvView *view)
4760 {
4761         gdouble speed, value;
4762
4763         /* If the user stops autoscrolling, autoscrolling will be
4764          * set to false but the timeout will continue; stop the timeout: */
4765         if (!view->scroll_info.autoscrolling) {
4766                 view->scroll_info.timeout_id = 0;
4767                 return FALSE;
4768         }
4769
4770         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4771                 (view->scroll_info.last_y < view->scroll_info.start_y))
4772                 return TRUE;
4773
4774         /* Replace 100 with your speed of choice: The lower the faster.
4775          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4776          *      based on the distance of the starting point from the mouse
4777          * (All also effected by the timeout interval of this callback) */
4778
4779         if (view->scroll_info.start_y > view->scroll_info.last_y)
4780                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
4781         else
4782                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
4783
4784         value = gtk_adjustment_get_value (view->vadjustment);
4785         value = CLAMP (value + speed, 0,
4786                        gtk_adjustment_get_upper (view->vadjustment) -
4787                        gtk_adjustment_get_page_size (view->vadjustment));
4788         gtk_adjustment_set_value (view->vadjustment, value);
4789
4790         return TRUE;
4791
4792 }
4793
4794 void
4795 ev_view_autoscroll_start (EvView *view)
4796 {
4797         gint x, y;
4798
4799         g_return_if_fail (EV_IS_VIEW (view));
4800
4801         if (view->scroll_info.autoscrolling)
4802                 return;
4803
4804         view->scroll_info.autoscrolling = TRUE;
4805         view->scroll_info.timeout_id =
4806                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
4807                                view);
4808
4809         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4810         ev_view_handle_cursor_over_xy (view, x, y);
4811 }
4812
4813 void
4814 ev_view_autoscroll_stop (EvView *view)
4815 {
4816         gint x, y;
4817
4818         g_return_if_fail (EV_IS_VIEW (view));
4819
4820         if (!view->scroll_info.autoscrolling)
4821                 return;
4822
4823         view->scroll_info.autoscrolling = FALSE;
4824         if (view->scroll_info.timeout_id) {
4825                 g_source_remove (view->scroll_info.timeout_id);
4826                 view->scroll_info.timeout_id = 0;
4827         }
4828
4829         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4830         ev_view_handle_cursor_over_xy (view, x, y);
4831 }
4832
4833 static void
4834 ev_view_document_changed_cb (EvDocumentModel *model,
4835                              GParamSpec      *pspec,
4836                              EvView          *view)
4837 {
4838         EvDocument *document = ev_document_model_get_document (model);
4839
4840         if (document != view->document) {
4841                 gint current_page;
4842
4843                 clear_caches (view);
4844
4845                 if (view->document) {
4846                         g_object_unref (view->document);
4847                 }
4848
4849                 view->document = document;
4850                 view->find_result = 0;
4851
4852                 if (view->document) {
4853                         view->loading = FALSE;
4854                         g_object_ref (view->document);
4855                         setup_caches (view);
4856                 }
4857
4858                 current_page = ev_document_model_get_page (model);
4859                 if (view->current_page != current_page) {
4860                         ev_view_change_page (view, current_page);
4861                 } else {
4862                         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4863                         gtk_widget_queue_resize (GTK_WIDGET (view));
4864                 }
4865         }
4866 }
4867
4868 static void
4869 ev_view_rotation_changed_cb (EvDocumentModel *model,
4870                              GParamSpec      *pspec,
4871                              EvView          *view)
4872 {
4873         gint rotation = ev_document_model_get_rotation (model);
4874
4875         view->rotation = rotation;
4876
4877         if (view->pixbuf_cache) {
4878                 ev_pixbuf_cache_clear (view->pixbuf_cache);
4879                 if (!ev_document_is_page_size_uniform (view->document))
4880                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4881                 gtk_widget_queue_resize (GTK_WIDGET (view));
4882         }
4883
4884         ev_view_remove_all (view);
4885
4886         if (rotation != 0)
4887                 clear_selection (view);
4888 }
4889
4890 static void
4891 ev_view_inverted_colors_changed_cb (EvDocumentModel *model,
4892                                     GParamSpec      *pspec,
4893                                     EvView          *view)
4894 {
4895         if (view->pixbuf_cache) {
4896                 gboolean inverted_colors;
4897
4898                 inverted_colors = ev_document_model_get_inverted_colors (model);
4899                 ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
4900                 gtk_widget_queue_draw (GTK_WIDGET (view));
4901         }
4902 }
4903
4904 static void
4905 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
4906                                 GParamSpec      *pspec,
4907                                 EvView          *view)
4908 {
4909         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
4910
4911         view->sizing_mode = mode;
4912         if (mode != EV_SIZING_FREE)
4913                 gtk_widget_queue_resize (GTK_WIDGET (view));
4914 }
4915
4916 #define EPSILON 0.0000001
4917 static void
4918 ev_view_scale_changed_cb (EvDocumentModel *model,
4919                           GParamSpec      *pspec,
4920                           EvView          *view)
4921 {
4922         gdouble scale = ev_document_model_get_scale (model);
4923
4924         if (ABS (view->scale - scale) < EPSILON)
4925                 return;
4926
4927         view->scale = scale;
4928
4929         view->pending_resize = TRUE;
4930         if (view->sizing_mode == EV_SIZING_FREE)
4931                 gtk_widget_queue_resize (GTK_WIDGET (view));
4932 }
4933
4934 static void
4935 ev_view_continuous_changed_cb (EvDocumentModel *model,
4936                                GParamSpec      *pspec,
4937                                EvView          *view)
4938 {
4939         gboolean continuous = ev_document_model_get_continuous (model);
4940
4941         view->continuous = continuous;
4942         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4943         gtk_widget_queue_resize (GTK_WIDGET (view));
4944 }
4945
4946 static void
4947 ev_view_dual_page_changed_cb (EvDocumentModel *model,
4948                               GParamSpec      *pspec,
4949                               EvView          *view)
4950 {
4951         gboolean dual_page = ev_document_model_get_dual_page (model);
4952
4953         view->dual_page = dual_page;
4954         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4955         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
4956          * preload_cache_size to be 2 if dual_page is set.
4957          */
4958         gtk_widget_queue_resize (GTK_WIDGET (view));
4959 }
4960
4961 static void
4962 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
4963                                GParamSpec      *pspec,
4964                                EvView          *view)
4965 {
4966         gboolean fullscreen = ev_document_model_get_fullscreen (model);
4967
4968         view->fullscreen = fullscreen;
4969         gtk_widget_queue_resize (GTK_WIDGET (view));
4970 }
4971
4972 void
4973 ev_view_set_model (EvView          *view,
4974                    EvDocumentModel *model)
4975 {
4976         g_return_if_fail (EV_IS_VIEW (view));
4977         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
4978
4979         if (model == view->model)
4980                 return;
4981
4982         if (view->model) {
4983                 g_signal_handlers_disconnect_by_func (view->model,
4984                                                       ev_view_document_changed_cb,
4985                                                       view);
4986                 g_signal_handlers_disconnect_by_func (view->model,
4987                                                       ev_view_page_changed_cb,
4988                                                       view);
4989                 g_object_unref (view->model);
4990         }
4991         view->model = g_object_ref (model);
4992
4993         /* Initialize view from model */
4994         view->rotation = ev_document_model_get_rotation (view->model);
4995         view->sizing_mode = ev_document_model_get_sizing_mode (view->model);
4996         view->scale = ev_document_model_get_scale (view->model);
4997         view->continuous = ev_document_model_get_continuous (view->model);
4998         view->dual_page = ev_document_model_get_dual_page (view->model);
4999         view->fullscreen = ev_document_model_get_fullscreen (view->model);
5000         ev_view_document_changed_cb (view->model, NULL, view);
5001
5002         g_signal_connect (view->model, "notify::document",
5003                           G_CALLBACK (ev_view_document_changed_cb),
5004                           view);
5005         g_signal_connect (view->model, "notify::rotation",
5006                           G_CALLBACK (ev_view_rotation_changed_cb),
5007                           view);
5008         g_signal_connect (view->model, "notify::inverted-colors",
5009                           G_CALLBACK (ev_view_inverted_colors_changed_cb),
5010                           view);
5011         g_signal_connect (view->model, "notify::sizing-mode",
5012                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
5013                           view);
5014         g_signal_connect (view->model, "notify::scale",
5015                           G_CALLBACK (ev_view_scale_changed_cb),
5016                           view);
5017         g_signal_connect (view->model, "notify::continuous",
5018                           G_CALLBACK (ev_view_continuous_changed_cb),
5019                           view);
5020         g_signal_connect (view->model, "notify::dual-page",
5021                           G_CALLBACK (ev_view_dual_page_changed_cb),
5022                           view);
5023         g_signal_connect (view->model, "notify::fullscreen",
5024                           G_CALLBACK (ev_view_fullscreen_changed_cb),
5025                           view);
5026         g_signal_connect (view->model, "page-changed",
5027                           G_CALLBACK (ev_view_page_changed_cb),
5028                           view);
5029 }
5030
5031 static void
5032 ev_view_reload_page (EvView         *view,
5033                      gint            page,
5034                      cairo_region_t *region)
5035 {
5036         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5037                                      region,
5038                                      page,
5039                                      view->rotation,
5040                                      view->scale);
5041 }
5042
5043 void
5044 ev_view_reload (EvView *view)
5045 {
5046         ev_pixbuf_cache_clear (view->pixbuf_cache);
5047         view_update_range_and_current_page (view);
5048 }
5049
5050 /*** Zoom and sizing mode ***/
5051
5052 gboolean
5053 ev_view_can_zoom_in (EvView *view)
5054 {
5055         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
5056 }
5057
5058 gboolean
5059 ev_view_can_zoom_out (EvView *view)
5060 {
5061         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
5062 }
5063
5064 void
5065 ev_view_zoom_in (EvView *view)
5066 {
5067         gdouble scale;
5068
5069         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5070
5071         view->pending_scroll = SCROLL_TO_CENTER;
5072         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
5073         ev_document_model_set_scale (view->model, scale);
5074 }
5075
5076 void
5077 ev_view_zoom_out (EvView *view)
5078 {
5079         gdouble scale;
5080
5081         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5082
5083         view->pending_scroll = SCROLL_TO_CENTER;
5084         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5085         ev_document_model_set_scale (view->model, scale);
5086 }
5087
5088 static double
5089 zoom_for_size_fit_width (gdouble doc_width,
5090                          gdouble doc_height,
5091                          int     target_width,
5092                          int     target_height)
5093 {
5094         return (double)target_width / doc_width;
5095 }
5096
5097 static double
5098 zoom_for_size_fit_height (gdouble doc_width,
5099                           gdouble doc_height,
5100                           int     target_width,
5101                           int     target_height)
5102 {
5103         return (double)target_height / doc_height;
5104 }
5105
5106 static double
5107 zoom_for_size_best_fit (gdouble doc_width,
5108                         gdouble doc_height,
5109                         int     target_width,
5110                         int     target_height)
5111 {
5112         double w_scale;
5113         double h_scale;
5114
5115         w_scale = (double)target_width / doc_width;
5116         h_scale = (double)target_height / doc_height;
5117
5118         return MIN (w_scale, h_scale);
5119 }
5120
5121 static void
5122 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5123                                                 int     width,
5124                                                 int     height)
5125 {
5126         gdouble doc_width, doc_height;
5127         GtkBorder border;
5128         gdouble scale;
5129         gint sb_size;
5130
5131         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5132         if (view->rotation == 90 || view->rotation == 270) {
5133                 gdouble tmp;
5134
5135                 tmp = doc_width;
5136                 doc_width = doc_height;
5137                 doc_height = tmp;
5138         }
5139
5140         compute_border (view, doc_width, doc_height, &border);
5141
5142         doc_width *= 2;
5143         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5144         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5145
5146         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5147
5148         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5149                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5150         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5151                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5152         else
5153                 g_assert_not_reached ();
5154
5155         ev_document_model_set_scale (view->model, scale);
5156 }
5157
5158 static void
5159 ev_view_zoom_for_size_continuous (EvView *view,
5160                                   int     width,
5161                                   int     height)
5162 {
5163         gdouble doc_width, doc_height;
5164         GtkBorder border;
5165         gdouble scale;
5166         gint sb_size;
5167
5168         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5169         if (view->rotation == 90 || view->rotation == 270) {
5170                 gdouble tmp;
5171
5172                 tmp = doc_width;
5173                 doc_width = doc_height;
5174                 doc_height = tmp;
5175         }
5176
5177         compute_border (view, doc_width, doc_height, &border);
5178
5179         width -= (border.left + border.right + 2 * view->spacing);
5180         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5181
5182         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5183
5184         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5185                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5186         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5187                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5188         else
5189                 g_assert_not_reached ();
5190
5191         ev_document_model_set_scale (view->model, scale);
5192 }
5193
5194 static void
5195 ev_view_zoom_for_size_dual_page (EvView *view,
5196                                  int     width,
5197                                  int     height)
5198 {
5199         GtkBorder border;
5200         gdouble doc_width, doc_height;
5201         gdouble scale;
5202         gint other_page;
5203
5204         other_page = view->current_page ^ 1;
5205
5206         /* Find the largest of the two. */
5207         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5208         if (other_page < ev_document_get_n_pages (view->document)) {
5209                 gdouble width_2, height_2;
5210
5211                 get_doc_page_size (view, other_page, &width_2, &height_2);
5212                 if (width_2 > doc_width)
5213                         doc_width = width_2;
5214                 if (height_2 > doc_height)
5215                         doc_height = height_2;
5216         }
5217         compute_border (view, width, height, &border);
5218
5219         doc_width = doc_width * 2;
5220         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5221         height -= (border.top + border.bottom + 2 * view->spacing);
5222
5223         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5224                 gint sb_size;
5225
5226                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5227                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5228         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5229                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5230         else
5231                 g_assert_not_reached ();
5232
5233         ev_document_model_set_scale (view->model, scale);
5234 }
5235
5236 static void
5237 ev_view_zoom_for_size_single_page (EvView *view,
5238                                    int     width,
5239                                    int     height)
5240 {
5241         gdouble doc_width, doc_height;
5242         GtkBorder border;
5243         gdouble scale;
5244
5245         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5246
5247         /* Get an approximate border */
5248         compute_border (view, width, height, &border);
5249
5250         width -= (border.left + border.right + 2 * view->spacing);
5251         height -= (border.top + border.bottom + 2 * view->spacing);
5252
5253         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5254                 gint sb_size;
5255
5256                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5257                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5258         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5259                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5260         else
5261                 g_assert_not_reached ();
5262
5263         ev_document_model_set_scale (view->model, scale);
5264 }
5265
5266 static void
5267 ev_view_zoom_for_size (EvView *view,
5268                        int     width,
5269                        int     height)
5270 {
5271         g_return_if_fail (EV_IS_VIEW (view));
5272         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5273                           view->sizing_mode == EV_SIZING_BEST_FIT);
5274         g_return_if_fail (width >= 0);
5275         g_return_if_fail (height >= 0);
5276
5277         if (view->document == NULL)
5278                 return;
5279
5280         if (view->continuous && view->dual_page)
5281                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5282         else if (view->continuous)
5283                 ev_view_zoom_for_size_continuous (view, width, height);
5284         else if (view->dual_page)
5285                 ev_view_zoom_for_size_dual_page (view, width, height);
5286         else
5287                 ev_view_zoom_for_size_single_page (view, width, height);
5288 }
5289
5290 /*** Find ***/
5291 static gint
5292 ev_view_find_get_n_results (EvView *view, gint page)
5293 {
5294         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5295 }
5296
5297 static EvRectangle *
5298 ev_view_find_get_result (EvView *view, gint page, gint result)
5299 {
5300         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5301 }
5302
5303 static void
5304 jump_to_find_result (EvView *view)
5305 {
5306         gint n_results;
5307         gint page = view->current_page;
5308
5309         n_results = ev_view_find_get_n_results (view, page);
5310
5311         if (n_results > 0 && view->find_result < n_results) {
5312                 EvRectangle *rect;
5313                 GdkRectangle view_rect;
5314
5315                 rect = ev_view_find_get_result (view, page, view->find_result);
5316                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5317                 ensure_rectangle_is_visible (view, &view_rect);
5318                 view->jump_to_find_result = FALSE;
5319         }
5320 }
5321
5322 /**
5323  * jump_to_find_page
5324  * @view: #EvView instance
5325  * @direction: Direction to look
5326  * @shift: Shift from current page
5327  *
5328  * Jumps to the first page that has occurences of searched word.
5329  * Uses a direction where to look and a shift from current page.
5330  *
5331  */
5332 static void
5333 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5334 {
5335         int n_pages, i;
5336
5337         n_pages = ev_document_get_n_pages (view->document);
5338
5339         for (i = 0; i < n_pages; i++) {
5340                 int page;
5341
5342                 if (direction == EV_VIEW_FIND_NEXT)
5343                         page = view->current_page + i;
5344                 else
5345                         page = view->current_page - i;
5346                 page += shift;
5347
5348                 if (page >= n_pages) {
5349                         page = page - n_pages;
5350                 } else if (page < 0)
5351                         page = page + n_pages;
5352
5353                 if (ev_view_find_get_n_results (view, page) > 0) {
5354                         ev_document_model_set_page (view->model, page);
5355                         break;
5356                 }
5357         }
5358 }
5359
5360 void
5361 ev_view_find_changed (EvView *view, GList **results, gint page)
5362 {
5363         view->find_pages = results;
5364
5365         if (view->jump_to_find_result == TRUE) {
5366                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5367                 jump_to_find_result (view);
5368         }
5369
5370         if (view->current_page == page)
5371                 gtk_widget_queue_draw (GTK_WIDGET (view));
5372 }
5373
5374 void
5375 ev_view_find_next (EvView *view)
5376 {
5377         gint n_results;
5378
5379         n_results = ev_view_find_get_n_results (view, view->current_page);
5380         view->find_result++;
5381
5382         if (view->find_result >= n_results) {
5383                 view->find_result = 0;
5384                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5385                 jump_to_find_result (view);
5386         } else {
5387                 jump_to_find_result (view);
5388                 gtk_widget_queue_draw (GTK_WIDGET (view));
5389         }
5390 }
5391
5392 void
5393 ev_view_find_previous (EvView *view)
5394 {
5395         view->find_result--;
5396
5397         if (view->find_result < 0) {
5398                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5399                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5400                 jump_to_find_result (view);
5401         } else {
5402                 jump_to_find_result (view);
5403                 gtk_widget_queue_draw (GTK_WIDGET (view));
5404         }
5405 }
5406
5407 void
5408 ev_view_find_search_changed (EvView *view)
5409 {
5410         /* search string has changed, focus on new search result */
5411         view->jump_to_find_result = TRUE;
5412         view->find_pages = NULL;
5413 }
5414
5415 void
5416 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5417 {
5418         view->highlight_find_results = value;
5419         gtk_widget_queue_draw (GTK_WIDGET (view));
5420 }
5421
5422 void
5423 ev_view_find_cancel (EvView *view)
5424 {
5425         view->find_pages = NULL;
5426 }
5427
5428 /*** Synctex ***/
5429 void
5430 ev_view_highlight_forward_search (EvView       *view,
5431                                   EvSourceLink *link)
5432 {
5433         EvMapping   *mapping;
5434         gint         page;
5435         GdkRectangle view_rect;
5436
5437         if (!ev_document_has_synctex (view->document))
5438                 return;
5439
5440         mapping = ev_document_synctex_forward_search (view->document, link);
5441         if (!mapping)
5442                 return;
5443
5444         if (view->synctex_result)
5445                 g_free (view->synctex_result);
5446         view->synctex_result = mapping;
5447
5448         page = GPOINTER_TO_INT (mapping->data);
5449         ev_document_model_set_page (view->model, page);
5450
5451         doc_rect_to_view_rect (view, page, &mapping->area, &view_rect);
5452         ensure_rectangle_is_visible (view, &view_rect);
5453         gtk_widget_queue_draw (GTK_WIDGET (view));
5454 }
5455
5456 /*** Selections ***/
5457
5458 /* compute_new_selection_rect/text calculates the area currently selected by
5459  * view_rect.  each handles a different mode;
5460  */
5461 static GList *
5462 compute_new_selection_rect (EvView       *view,
5463                             GdkPoint     *start,
5464                             GdkPoint     *stop)
5465 {
5466         GdkRectangle view_rect;
5467         int n_pages, i;
5468         GList *list = NULL;
5469
5470         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5471
5472         view_rect.x = MIN (start->x, stop->x);
5473         view_rect.y = MIN (start->y, stop->y);
5474         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5475         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5476
5477         n_pages = ev_document_get_n_pages (view->document);
5478
5479         for (i = 0; i < n_pages; i++) {
5480                 GdkRectangle page_area;
5481                 GtkBorder border;
5482
5483                 if (ev_view_get_page_extents (view, i, &page_area, &border)) {
5484                         GdkRectangle overlap;
5485
5486                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5487                                 EvViewSelection *selection;
5488
5489                                 selection = g_new0 (EvViewSelection, 1);
5490                                 selection->page = i;
5491                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5492                                                        &(selection->rect));
5493
5494                                 list = g_list_append (list, selection);
5495                         }
5496                 }
5497         }
5498
5499         return list;
5500 }
5501
5502 static gboolean
5503 gdk_rectangle_point_in (GdkRectangle *rectangle,
5504                         GdkPoint     *point)
5505 {
5506         return rectangle->x <= point->x &&
5507                 rectangle->y <= point->y &&
5508                 point->x < rectangle->x + rectangle->width &&
5509                 point->y < rectangle->y + rectangle->height;
5510 }
5511
5512 static GList *
5513 compute_new_selection_text (EvView          *view,
5514                             EvSelectionStyle style,
5515                             GdkPoint        *start,
5516                             GdkPoint        *stop)
5517 {
5518         int n_pages, i, first, last;
5519         GList *list = NULL;
5520         EvViewSelection *selection;
5521         gdouble width, height;
5522         int start_page, end_page;
5523
5524         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5525
5526         n_pages = ev_document_get_n_pages (view->document);
5527
5528         /* First figure out the range of pages the selection
5529          * affects. */
5530         first = n_pages;
5531         last = 0;
5532         if (view->continuous) {
5533                 start_page = 0;
5534                 end_page = n_pages;
5535         } else if (view->dual_page) {
5536                 start_page = view->start_page;
5537                 end_page = view->end_page + 1;
5538         } else {
5539                 start_page = view->current_page;
5540                 end_page = view->current_page + 1;
5541         }
5542
5543         for (i = start_page; i < end_page; i++) {
5544                 GdkRectangle page_area;
5545                 GtkBorder border;
5546
5547                 ev_view_get_page_extents (view, i, &page_area, &border);
5548                 if (gdk_rectangle_point_in (&page_area, start) ||
5549                     gdk_rectangle_point_in (&page_area, stop)) {
5550                         if (first == n_pages)
5551                                 first = i;
5552                         last = i;
5553                 }
5554
5555         }
5556
5557         /* Now create a list of EvViewSelection's for the affected
5558          * pages.  This could be an empty list, a list of just one
5559          * page or a number of pages.*/
5560         for (i = first; i < last + 1; i++) {
5561                 GdkRectangle page_area;
5562                 GtkBorder border;
5563                 GdkPoint *point;
5564
5565                 get_doc_page_size (view, i, &width, &height);
5566
5567                 selection = g_new0 (EvViewSelection, 1);
5568                 selection->page = i;
5569                 selection->style = style;
5570                 selection->rect.x1 = selection->rect.y1 = 0;
5571                 selection->rect.x2 = width;
5572                 selection->rect.y2 = height;
5573
5574                 ev_view_get_page_extents (view, i, &page_area, &border);
5575
5576                 if (gdk_rectangle_point_in (&page_area, start))
5577                         point = start;
5578                 else
5579                         point = stop;
5580
5581                 if (i == first)
5582                         view_point_to_doc_point (view, point, &page_area,
5583                                                  &selection->rect.x1,
5584                                                  &selection->rect.y1);
5585
5586                 /* If the selection is contained within just one page,
5587                  * make sure we don't write 'start' into both points
5588                  * in selection->rect. */
5589                 if (first == last)
5590                         point = stop;
5591
5592                 if (i == last)
5593                         view_point_to_doc_point (view, point, &page_area,
5594                                                  &selection->rect.x2,
5595                                                  &selection->rect.y2);
5596
5597                 list = g_list_append (list, selection);
5598         }
5599
5600         return list;
5601 }
5602
5603 /* This function takes the newly calculated list, and figures out which regions
5604  * have changed.  It then queues a redraw approporiately.
5605  */
5606 static void
5607 merge_selection_region (EvView *view,
5608                         GList  *new_list)
5609 {
5610         GList *old_list;
5611         GList *new_list_ptr, *old_list_ptr;
5612
5613         /* Update the selection */
5614         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5615         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5616         g_list_free (view->selection_info.selections);
5617         view->selection_info.selections = new_list;
5618         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5619         g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
5620
5621         new_list_ptr = new_list;
5622         old_list_ptr = old_list;
5623
5624         while (new_list_ptr || old_list_ptr) {
5625                 EvViewSelection *old_sel, *new_sel;
5626                 int cur_page;
5627                 cairo_region_t *region = NULL;
5628
5629                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5630                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5631
5632                 /* Assume that the lists are in order, and we run through them
5633                  * comparing them, one page at a time.  We come out with the
5634                  * first page we see. */
5635                 if (new_sel && old_sel) {
5636                         if (new_sel->page < old_sel->page) {
5637                                 new_list_ptr = new_list_ptr->next;
5638                                 old_sel = NULL;
5639                         } else if (new_sel->page > old_sel->page) {
5640                                 old_list_ptr = old_list_ptr->next;
5641                                 new_sel = NULL;
5642                         } else {
5643                                 new_list_ptr = new_list_ptr->next;
5644                                 old_list_ptr = old_list_ptr->next;
5645                         }
5646                 } else if (new_sel) {
5647                         new_list_ptr = new_list_ptr->next;
5648                 } else if (old_sel) {
5649                         old_list_ptr = old_list_ptr->next;
5650                 }
5651
5652                 g_assert (new_sel || old_sel);
5653
5654                 /* is the page we're looking at on the screen?*/
5655                 cur_page = new_sel ? new_sel->page : old_sel->page;
5656                 if (cur_page < view->start_page || cur_page > view->end_page)
5657                         continue;
5658
5659                 /* seed the cache with a new page.  We are going to need the new
5660                  * region too. */
5661                 if (new_sel) {
5662                         cairo_region_t *tmp_region = NULL;
5663
5664                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5665                                                                cur_page,
5666                                                                view->scale,
5667                                                                &tmp_region);
5668
5669                         if (tmp_region && !cairo_region_is_empty (tmp_region)) {
5670                                 new_sel->covered_region = cairo_region_reference (tmp_region);
5671                         }
5672                 }
5673
5674                 /* Now we figure out what needs redrawing */
5675                 if (old_sel && new_sel) {
5676                         if (old_sel->covered_region && new_sel->covered_region) {
5677                                 /* We only want to redraw the areas that have
5678                                  * changed, so we xor the old and new regions
5679                                  * and redraw if it's different */
5680                                 region = cairo_region_copy (old_sel->covered_region);
5681 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 9, 12)
5682                                 cairo_region_xor (region, new_sel->covered_region);
5683 #else
5684                                 cairo_region_t *tbr;
5685                                 tbr = cairo_region_copy (new_sel->covered_region);
5686
5687                                 /* xor old_sel, new_sel*/
5688                                 cairo_region_subtract (tbr, region);
5689                                 cairo_region_subtract (region, new_sel->covered_region);
5690                                 cairo_region_union (region, tbr);
5691                                 cairo_region_destroy (tbr);
5692 #endif
5693
5694                                 if (cairo_region_is_empty (region)) {
5695                                         cairo_region_destroy (region);
5696                                         region = NULL;
5697                                 } else {
5698                                         gint num_rectangles = cairo_region_num_rectangles (region);
5699                                         GdkRectangle r;
5700
5701                                         /* We need to make the damage region a little bigger
5702                                          * because the edges of the old selection might change
5703                                          */
5704                                         cairo_region_get_rectangle (region, 0, &r);
5705                                         r.x -= 5;
5706                                         r.width = 5;
5707                                         cairo_region_union_rectangle (region, &r);
5708
5709                                         cairo_region_get_rectangle (region, num_rectangles - 1, &r);
5710                                         r.x += r.width;
5711                                         r.width = 5;
5712                                         cairo_region_union_rectangle (region, &r);
5713                                 }
5714                         } else if (old_sel->covered_region) {
5715                                 region = cairo_region_copy (old_sel->covered_region);
5716                         } else if (new_sel->covered_region) {
5717                                 region = cairo_region_copy (new_sel->covered_region);
5718                         }
5719                 } else if (old_sel && !new_sel) {
5720                         if (old_sel->covered_region && !cairo_region_is_empty (old_sel->covered_region)) {
5721                                 region = cairo_region_copy (old_sel->covered_region);
5722                         }
5723                 } else if (!old_sel && new_sel) {
5724                         if (new_sel->covered_region && !cairo_region_is_empty (new_sel->covered_region)) {
5725                                 region = cairo_region_copy (new_sel->covered_region);
5726                         }
5727                 } else {
5728                         g_assert_not_reached ();
5729                 }
5730
5731                 /* Redraw the damaged region! */
5732                 if (region) {
5733                         GdkWindow   *bin_window;
5734                         GdkRectangle page_area;
5735                         GtkBorder    border;
5736
5737                         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
5738                         ev_view_get_page_extents (view, cur_page, &page_area, &border);
5739                         cairo_region_translate (region,
5740                                            page_area.x + border.left - view->scroll_x,
5741                                            page_area.y + border.top - view->scroll_y);
5742                         gdk_window_invalidate_region (bin_window, region, TRUE);
5743                         cairo_region_destroy (region);
5744                 }
5745         }
5746
5747         /* Free the old list, now that we're done with it. */
5748         g_list_foreach (old_list, (GFunc) selection_free, NULL);
5749         g_list_free (old_list);
5750 }
5751
5752 static void
5753 compute_selections (EvView          *view,
5754                     EvSelectionStyle style,
5755                     GdkPoint        *start,
5756                     GdkPoint        *stop)
5757 {
5758         GList *list;
5759
5760         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
5761                 list = compute_new_selection_rect (view, start, stop);
5762         else
5763                 list = compute_new_selection_text (view, style, start, stop);
5764         merge_selection_region (view, list);
5765 }
5766
5767 /* Free's the selection.  It's up to the caller to queue redraws if needed.
5768  */
5769 static void
5770 selection_free (EvViewSelection *selection)
5771 {
5772         if (selection->covered_region)
5773                 cairo_region_destroy (selection->covered_region);
5774         g_free (selection);
5775 }
5776
5777 static void
5778 clear_selection (EvView *view)
5779 {
5780         if (view->selection_info.selections) {
5781                 g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5782                 g_list_free (view->selection_info.selections);
5783                 view->selection_info.selections = NULL;
5784
5785                 g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
5786         }
5787         view->selection_info.in_selection = FALSE;
5788         if (view->pixbuf_cache)
5789                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
5790 }
5791
5792 void
5793 ev_view_select_all (EvView *view)
5794 {
5795         GList *selections = NULL;
5796         int n_pages, i;
5797
5798         /* Disable selection on rotated pages for the 0.4.0 series */
5799         if (view->rotation != 0)
5800                 return;
5801
5802         clear_selection (view);
5803
5804         n_pages = ev_document_get_n_pages (view->document);
5805         for (i = 0; i < n_pages; i++) {
5806                 gdouble width, height;
5807                 EvViewSelection *selection;
5808
5809                 get_doc_page_size (view, i, &width, &height);
5810
5811                 selection = g_new0 (EvViewSelection, 1);
5812                 selection->page = i;
5813                 selection->style = EV_SELECTION_STYLE_GLYPH;
5814                 selection->rect.x1 = selection->rect.y1 = 0;
5815                 selection->rect.x2 = width;
5816                 selection->rect.y2 = height;
5817
5818                 selections = g_list_append (selections, selection);
5819         }
5820
5821         merge_selection_region (view, selections);
5822         gtk_widget_queue_draw (GTK_WIDGET (view));
5823 }
5824
5825 gboolean
5826 ev_view_get_has_selection (EvView *view)
5827 {
5828         return view->selection_info.selections != NULL;
5829 }
5830
5831 static char *
5832 get_selected_text (EvView *view)
5833 {
5834         GString *text;
5835         GList *l;
5836         gchar *normalized_text;
5837
5838         text = g_string_new (NULL);
5839
5840         ev_document_doc_mutex_lock ();
5841
5842         for (l = view->selection_info.selections; l != NULL; l = l->next) {
5843                 EvViewSelection *selection = (EvViewSelection *)l->data;
5844                 EvPage *page;
5845                 gchar *tmp;
5846
5847                 page = ev_document_get_page (view->document, selection->page);
5848                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
5849                                                       page, selection->style,
5850                                                       &(selection->rect));
5851                 g_object_unref (page);
5852                 g_string_append (text, tmp);
5853                 g_free (tmp);
5854         }
5855
5856         ev_document_doc_mutex_unlock ();
5857
5858         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
5859         g_string_free (text, TRUE);
5860         return normalized_text;
5861 }
5862
5863 static void
5864 ev_view_clipboard_copy (EvView      *view,
5865                         const gchar *text)
5866 {
5867         GtkClipboard *clipboard;
5868
5869         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
5870                                               GDK_SELECTION_CLIPBOARD);
5871         gtk_clipboard_set_text (clipboard, text, -1);
5872 }
5873
5874 void
5875 ev_view_copy (EvView *ev_view)
5876 {
5877         char *text;
5878
5879         if (!EV_IS_SELECTION (ev_view->document))
5880                 return;
5881
5882         text = get_selected_text (ev_view);
5883         ev_view_clipboard_copy (ev_view, text);
5884         g_free (text);
5885 }
5886
5887 static void
5888 ev_view_primary_get_cb (GtkClipboard     *clipboard,
5889                         GtkSelectionData *selection_data,
5890                         guint             info,
5891                         gpointer          data)
5892 {
5893         EvView *ev_view = EV_VIEW (data);
5894
5895         if (ev_view->link_selected) {
5896                 gtk_selection_data_set_text (selection_data,
5897                                              ev_link_action_get_uri (ev_view->link_selected),
5898                                              -1);
5899         } else if (EV_IS_SELECTION (ev_view->document) &&
5900                    ev_view->selection_info.selections) {
5901                 gchar *text;
5902
5903                 text = get_selected_text (ev_view);
5904                 if (text) {
5905                         gtk_selection_data_set_text (selection_data, text, -1);
5906                         g_free (text);
5907                 }
5908         }
5909 }
5910
5911 static void
5912 ev_view_primary_clear_cb (GtkClipboard *clipboard,
5913                           gpointer      data)
5914 {
5915         EvView *view = EV_VIEW (data);
5916
5917         clear_selection (view);
5918         clear_link_selected (view);
5919 }
5920
5921 static void
5922 ev_view_update_primary_selection (EvView *ev_view)
5923 {
5924         GtkClipboard *clipboard;
5925
5926         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
5927                                               GDK_SELECTION_PRIMARY);
5928
5929         if (ev_view->selection_info.selections || ev_view->link_selected) {
5930                 GtkTargetList *target_list;
5931                 GtkTargetEntry *targets;
5932                 int n_targets;
5933
5934                 target_list = gtk_target_list_new (NULL, 0);
5935                 gtk_target_list_add_text_targets (target_list, 0);
5936                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
5937                 gtk_target_list_unref (target_list);
5938
5939                 if (!gtk_clipboard_set_with_owner (clipboard,
5940                                                    targets, n_targets,
5941                                                    ev_view_primary_get_cb,
5942                                                    ev_view_primary_clear_cb,
5943                                                    G_OBJECT (ev_view)))
5944                         ev_view_primary_clear_cb (clipboard, ev_view);
5945
5946                 gtk_target_table_free (targets, n_targets);
5947         } else {
5948                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
5949                         gtk_clipboard_clear (clipboard);
5950         }
5951 }
5952
5953 static void
5954 clear_link_selected (EvView *view)
5955 {
5956         if (view->link_selected) {
5957                 g_object_unref (view->link_selected);
5958                 view->link_selected = NULL;
5959         }
5960 }
5961
5962 void
5963 ev_view_copy_link_address (EvView       *view,
5964                            EvLinkAction *action)
5965 {
5966         clear_link_selected (view);
5967
5968         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
5969
5970         view->link_selected = g_object_ref (action);
5971         ev_view_update_primary_selection (view);
5972 }
5973
5974 /*** Cursor operations ***/
5975 static void
5976 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
5977 {
5978         GdkCursor *cursor = NULL;
5979         GtkWidget *widget;
5980         GdkWindow *bin_window;
5981
5982         if (view->cursor == new_cursor) {
5983                 return;
5984         }
5985
5986         view->cursor = new_cursor;
5987
5988         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
5989         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
5990         cursor = ev_view_cursor_new (gtk_widget_get_display (widget), new_cursor);
5991         gdk_window_set_cursor (bin_window, cursor);
5992         gdk_flush ();
5993         if (cursor)
5994                 gdk_cursor_unref (cursor);
5995 }
5996
5997 void
5998 ev_view_hide_cursor (EvView *view)
5999 {
6000        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6001 }
6002
6003 void
6004 ev_view_show_cursor (EvView *view)
6005 {
6006        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6007 }
6008
6009 gboolean
6010 ev_view_next_page (EvView *view)
6011 {
6012         int page, n_pages;
6013
6014         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6015
6016         if (!view->document)
6017                 return FALSE;
6018
6019         page = ev_document_model_get_page (view->model);
6020         n_pages = ev_document_get_n_pages (view->document);
6021
6022         if (view->dual_page)
6023                 page = page + 2;
6024         else
6025                 page = page + 1;
6026
6027         if (page < n_pages) {
6028                 ev_document_model_set_page (view->model, page);
6029                 return TRUE;
6030         } else if (view->dual_page && page == n_pages) {
6031                 ev_document_model_set_page (view->model, page - 1);
6032                 return TRUE;
6033         } else {
6034                 return FALSE;
6035         }
6036 }
6037
6038 gboolean
6039 ev_view_previous_page (EvView *view)
6040 {
6041         int page;
6042
6043         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6044
6045         if (!view->document)
6046                 return FALSE;
6047
6048         page = ev_document_model_get_page (view->model);
6049
6050         if (view->dual_page)
6051                 page = page - 2;
6052         else
6053                 page = page - 1;
6054
6055         if (page >= 0) {
6056                 ev_document_model_set_page (view->model, page);
6057                 return TRUE;
6058         } else if (view->dual_page && page == -1) {
6059                 ev_document_model_set_page (view->model, 0);
6060                 return TRUE;
6061         } else {
6062                 return FALSE;
6063         }
6064 }
6065