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-layers.h"
  36 #include "ev-document-misc.h"
  37 #include "ev-pixbuf-cache.h"
  38 #include "ev-page-cache.h"
  39 #include "ev-view-marshal.h"
  40 #include "ev-document-annotations.h"
  41 #include "ev-annotation-window.h"
  42 #include "ev-loading-window.h"
  43 #include "ev-view.h"
  44 #include "ev-view-accessible.h"
  45 #include "ev-view-private.h"
  46 #include "ev-view-type-builtins.h"
  47
  48 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  49 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  50 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  51
  52 enum {
  53         SIGNAL_BINDING_ACTIVATED,
  54         SIGNAL_HANDLE_LINK,
  55         SIGNAL_EXTERNAL_LINK,
  56         SIGNAL_POPUP_MENU,
  57         SIGNAL_SELECTION_CHANGED,
  58         SIGNAL_SYNC_SOURCE,
  59         SIGNAL_ANNOT_ADDED,
  60         SIGNAL_LAYERS_CHANGED,
  61         N_SIGNALS
  62 };
  63
  64 enum {
  65         TARGET_DND_URI,
  66         TARGET_DND_TEXT,
  67         TARGET_DND_IMAGE
  68 };
  69
  70 static guint signals[N_SIGNALS];
  71
  72 typedef enum {
  73         EV_VIEW_FIND_NEXT,
  74         EV_VIEW_FIND_PREV
  75 } EvViewFindDirection;
  76
  77 #define ZOOM_IN_FACTOR  1.2
  78 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  79
  80 #define SCROLL_TIME 150
  81
  82 /*** Scrolling ***/
  83 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  84                                                               GtkAdjustment      *hadjustment,
  85                                                               GtkAdjustment      *vadjustment);
  86 static void       view_update_range_and_current_page         (EvView             *view);
  87 static void       set_scroll_adjustment                      (EvView             *view,
  88                                                               GtkOrientation      orientation,
  89                                                               GtkAdjustment      *adjustment);
  90 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
  91                                                               guint               keyval,
  92                                                               GdkModifierType modifiers,
  93                                                               GtkScrollType       scroll,
  94                                                               gboolean            horizontal);
  95 static void       ensure_rectangle_is_visible                (EvView             *view,
  96                                                               GdkRectangle       *rect);
  97
  98 /*** Geometry computations ***/
  99 static void       compute_border                             (EvView             *view,
 100                                                               int                 width,
 101                                                               int                 height,
 102                                                               GtkBorder          *border);
 103 static void       get_page_y_offset                          (EvView             *view,
 104                                                               int                 page,
 105                                                               int                *y_offset);
 106 static void       view_rect_to_doc_rect                      (EvView             *view,
 107                                                               GdkRectangle       *view_rect,
 108                                                               GdkRectangle       *page_area,
 109                                                               EvRectangle        *doc_rect);
 110 static void       doc_rect_to_view_rect                      (EvView             *view,
 111                                                               int                 page,
 112                                                               EvRectangle        *doc_rect,
 113                                                               GdkRectangle       *view_rect);
 114 static gboolean   get_dual_even_left                         (EvView             *view);
 115 static void       find_page_at_location                      (EvView             *view,
 116                                                               gdouble             x,
 117                                                               gdouble             y,
 118                                                               gint               *page,
 119                                                               gint               *x_offset,
 120                                                               gint               *y_offset);
 121 static void       doc_point_to_view_point                    (EvView             *view,
 122                                                               int                 page,
 123                                                               EvPoint            *doc_point,
 124                                                               GdkPoint           *view_point);
 125 /*** Hyperrefs ***/
 126 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 127                                                               gdouble             x,
 128                                                               gdouble             y);
 129 static char*      tip_from_link                              (EvView             *view,
 130                                                               EvLink             *link);
 131 /*** Forms ***/
 132 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 133                                                                gdouble            x,
 134                                                                gdouble            y);
 135
 136 /*** Annotations ***/
 137 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 138                                                               gdouble             x,
 139                                                               gdouble             y);
 140 static void          show_annotation_windows                 (EvView             *view,
 141                                                               gint                page);
 142 static void          hide_annotation_windows                 (EvView             *view,
 143                                                               gint                page);
 144 /*** GtkWidget implementation ***/
 145 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 146                                                               GtkRequisition     *requisition);
 147 static void       ev_view_size_request_continuous            (EvView             *view,
 148                                                               GtkRequisition     *requisition);
 149 static void       ev_view_size_request_dual_page             (EvView             *view,
 150                                                               GtkRequisition     *requisition);
 151 static void       ev_view_size_request_single_page           (EvView             *view,
 152                                                               GtkRequisition     *requisition);
 153 static void       ev_view_size_request                       (GtkWidget          *widget,
 154                                                               GtkRequisition     *requisition);
 155 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 156                                                               GtkAllocation      *allocation);
 157 static void       ev_view_realize                            (GtkWidget          *widget);
 158 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 159                                                               GdkEventScroll     *event);
 160 #if GTK_CHECK_VERSION (2, 90, 8)
 161 static gboolean   ev_view_draw                               (GtkWidget          *widget,
 162                                                               cairo_t            *cr);
 163 #else
 164 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 165                                                               GdkEventExpose     *event);
 166 #endif
 167 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 168 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 169                                                               GdkEventButton     *event);
 170 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 171                                                               GdkEventMotion     *event);
 172 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 173                                                               GdkEventButton     *event);
 174 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 175                                                               GdkEventCrossing   *event);
 176 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 177                                                               GdkEventCrossing   *event);
 178 static void       ev_view_style_set                          (GtkWidget          *widget,
 179                                                               GtkStyle           *old_style);
 180 static void       ev_view_remove_all                         (EvView             *view);
 181
 182 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 183
 184 /*** Drawing ***/
 185 static void       highlight_find_results                     (EvView             *view,
 186                                                               cairo_t            *cr,
 187                                                               int                 page);
 188 static void       highlight_forward_search_results           (EvView             *view,
 189                                                               cairo_t            *cr,
 190                                                               int                 page);
 191 static void       focus_annotation                           (EvView             *view,
 192                                                               cairo_t            *cr,
 193                                                               int                 page,
 194                                                               GdkRectangle       *clip);
 195 static void       draw_one_page                              (EvView             *view,
 196                                                               gint                page,
 197                                                               cairo_t            *cr,
 198                                                               GdkRectangle       *page_area,
 199                                                               GtkBorder          *border,
 200                                                               GdkRectangle       *expose_area,
 201                                                               gboolean           *page_ready);
 202 static void       show_loading_window                        (EvView             *view);
 203 static void       hide_loading_window                        (EvView             *view);
 204 static void       ev_view_reload_page                        (EvView             *view,
 205                                                               gint                page,
 206                                                               cairo_region_t     *region);
 207 static void       ev_view_loading_window_move                (EvView             *view);
 208
 209 /*** Callbacks ***/
 210 static void       ev_view_change_page                        (EvView             *view,
 211                                                               gint                new_page);
 212 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 213                                                               cairo_region_t     *region,
 214                                                               EvView             *view);
 215 static void       ev_view_page_changed_cb                    (EvDocumentModel    *model,
 216                                                               gint                old_page,
 217                                                               gint                new_page,
 218                                                               EvView             *view);
 219 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 220                                                               EvView             *view);
 221
 222 /*** GObject ***/
 223 static void       ev_view_finalize                           (GObject            *object);
 224 static void       ev_view_dispose                            (GObject            *object);
 225 static void       ev_view_class_init                         (EvViewClass        *class);
 226 static void       ev_view_init                               (EvView             *view);
 227
 228 /*** Zoom and sizing ***/
 229 static double   zoom_for_size_fit_width                      (gdouble doc_width,
 230                                                               gdouble doc_height,
 231                                                               int     target_width,
 232                                                               int     target_height);
 233 static double   zoom_for_size_fit_height                     (gdouble doc_width,
 234                                                               gdouble doc_height,
 235                                                               int     target_width,
 236                                                               int     target_height);
 237 static double   zoom_for_size_best_fit                       (gdouble doc_width,
 238                                                               gdouble doc_height,
 239                                                               int     target_width,
 240                                                               int     target_height);
 241 static void     ev_view_zoom_for_size                        (EvView *view,
 242                                                               int     width,
 243                                                               int     height);
 244 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 245                                                                 int     width,
 246                                                                 int     height);
 247 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 248                                                                 int     width,
 249                                                                 int     height);
 250 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 251                                                                 int     width,
 252                                                                 int     height);
 253 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 254                                                                 int     width,
 255                                                                 int     height);
 256 /*** Cursors ***/
 257 static void       ev_view_set_cursor                         (EvView             *view,
 258                                                               EvViewCursor        new_cursor);
 259 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 260                                                               gint x,
 261                                                               gint y);
 262
 263 /*** Find ***/
 264 static gint         ev_view_find_get_n_results               (EvView             *view,
 265                                                               gint                page);
 266 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 267                                                               gint                page,
 268                                                               gint                result);
 269 static void       jump_to_find_result                        (EvView             *view);
 270 static void       jump_to_find_page                          (EvView             *view,
 271                                                               EvViewFindDirection direction,
 272                                                               gint                shift);
 273 /*** Selection ***/
 274 static void       compute_selections                         (EvView             *view,
 275                                                               EvSelectionStyle    style,
 276                                                               GdkPoint           *start,
 277                                                               GdkPoint           *stop);
 278 static void       clear_selection                            (EvView             *view);
 279 static void       clear_link_selected                        (EvView             *view);
 280 static void       selection_free                             (EvViewSelection    *selection);
 281 static char*      get_selected_text                          (EvView             *ev_view);
 282 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 283                                                               GtkSelectionData   *selection_data,
 284                                                               guint               info,
 285                                                               gpointer            data);
 286 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 287                                                               gpointer            data);
 288 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 289
 290 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 291
 292 /* HeightToPage cache */
 293 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 294
 295 static void
 296 build_height_to_page (EvHeightToPageCache *cache,
 297                       EvDocument          *document,
 298                       gint                 rotation)
 299 {
 300         gboolean swap, uniform, dual_even_left;
 301         int i;
 302         double uniform_height, page_height, next_page_height;
 303         double saved_height;
 304         gdouble u_width, u_height;
 305         gint n_pages;
 306
 307         swap = (rotation == 90 || rotation == 270);
 308
 309         uniform = ev_document_is_page_size_uniform (document);
 310         n_pages = ev_document_get_n_pages (document);
 311         dual_even_left = (n_pages > 2);
 312
 313         g_free (cache->height_to_page);
 314         g_free (cache->dual_height_to_page);
 315
 316         cache->rotation = rotation;
 317         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 318         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 319
 320         if (uniform)
 321                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 322
 323         saved_height = 0;
 324         for (i = 0; i <= n_pages; i++) {
 325                 if (uniform) {
 326                         uniform_height = swap ? u_width : u_height;
 327                         cache->height_to_page[i] = i * uniform_height;
 328                 } else {
 329                         if (i < n_pages) {
 330                                 gdouble w, h;
 331
 332                                 ev_document_get_page_size (document, i, &w, &h);
 333                                 page_height = swap ? w : h;
 334                         } else {
 335                                 page_height = 0;
 336                         }
 337                         cache->height_to_page[i] = saved_height;
 338                         saved_height += page_height;
 339                 }
 340         }
 341
 342         if (dual_even_left && !uniform) {
 343                 gdouble w, h;
 344
 345                 ev_document_get_page_size (document, 0, &w, &h);
 346                 saved_height = swap ? w : h;
 347         } else {
 348                 saved_height = 0;
 349         }
 350
 351         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 352                 if (uniform) {
 353                         uniform_height = swap ? u_width : u_height;
 354                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 355                         if (i + 1 < n_pages + 2)
 356                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 357                 } else {
 358                         if (i + 1 < n_pages) {
 359                                 gdouble w, h;
 360
 361                                 ev_document_get_page_size (document, i + 1, &w, &h);
 362                                 next_page_height = swap ? w : h;
 363                         } else {
 364                                 next_page_height = 0;
 365                         }
 366
 367                         if (i < n_pages) {
 368                                 gdouble w, h;
 369
 370                                 ev_document_get_page_size (document, i, &w, &h);
 371                                 page_height = swap ? w : h;
 372                         } else {
 373                                 page_height = 0;
 374                         }
 375
 376                         if (i + 1 < n_pages + 2) {
 377                                 cache->dual_height_to_page[i] = saved_height;
 378                                 cache->dual_height_to_page[i + 1] = saved_height;
 379                                 saved_height += MAX(page_height, next_page_height);
 380                         } else {
 381                                 cache->dual_height_to_page[i] = saved_height;
 382                         }
 383                 }
 384         }
 385 }
 386
 387 static void
 388 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 389                                     EvDocument          *document,
 390                                     gint                 page,
 391                                     gint                 rotation,
 392                                     gdouble             *height,
 393                                     gdouble             *dual_height)
 394 {
 395         if (cache->rotation != rotation)
 396                 build_height_to_page (cache, document, rotation);
 397
 398         *height = cache->height_to_page[page];
 399         *dual_height = cache->dual_height_to_page[page];
 400 }
 401
 402 static void
 403 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 404 {
 405         if (cache->height_to_page) {
 406                 g_free (cache->height_to_page);
 407                 cache->height_to_page = NULL;
 408         }
 409
 410         if (cache->dual_height_to_page) {
 411                 g_free (cache->dual_height_to_page);
 412                 cache->dual_height_to_page = NULL;
 413         }
 414         g_free (cache);
 415 }
 416
 417 static EvHeightToPageCache *
 418 ev_view_get_height_to_page_cache (EvView *view)
 419 {
 420         EvHeightToPageCache *cache;
 421
 422         if (!view->document)
 423                 return NULL;
 424
 425         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 426         if (!cache) {
 427                 cache = g_new0 (EvHeightToPageCache, 1);
 428                 build_height_to_page (cache, view->document, view->rotation);
 429                 g_object_set_data_full (G_OBJECT (view->document),
 430                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 431                                         cache,
 432                                         (GDestroyNotify)ev_height_to_page_cache_free);
 433         }
 434
 435         return cache;
 436 }
 437
 438 static void
 439 ev_view_get_height_to_page (EvView *view,
 440                             gint    page,
 441                             gint   *height,
 442                             gint   *dual_height)
 443 {
 444         gdouble h, dh;
 445
 446         if (!view->height_to_page_cache)
 447                 return;
 448
 449         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 450                                             view->document,
 451                                             page,
 452                                             view->rotation,
 453                                             &h, &dh);
 454         if (height)
 455                 *height = (gint)(h * view->scale + 0.5);
 456
 457         if (dual_height)
 458                 *dual_height = (gint)(dh * view->scale + 0.5);
 459 }
 460
 461 static gint
 462 ev_view_get_scrollbar_size (EvView        *view,
 463                             GtkOrientation orientation)
 464 {
 465         GtkWidget *widget = GTK_WIDGET (view);
 466         GtkWidget *sb;
 467         GtkWidget *swindow = gtk_widget_get_parent (GTK_WIDGET (view));
 468         GtkAllocation allocation;
 469         GtkRequisition req;
 470         gint spacing;
 471
 472         if (!GTK_IS_SCROLLED_WINDOW (swindow))
 473                 return 0;
 474
 475         gtk_widget_get_allocation (widget, &allocation);
 476
 477         if (orientation == GTK_ORIENTATION_VERTICAL) {
 478                 if (allocation.height >= view->requisition.height)
 479                         sb = gtk_scrolled_window_get_vscrollbar (GTK_SCROLLED_WINDOW (swindow));
 480                 else
 481                         return 0;
 482         } else {
 483                 if (allocation.width >= view->requisition.width)
 484                         sb = gtk_scrolled_window_get_hscrollbar (GTK_SCROLLED_WINDOW (swindow));
 485                 else
 486                         return 0;
 487         }
 488
 489         gtk_widget_style_get (swindow, "scrollbar_spacing", &spacing, NULL);
 490         gtk_widget_size_request (sb, &req);
 491
 492         return (orientation == GTK_ORIENTATION_VERTICAL ? req.width : req.height) + spacing;
 493 }
 494
 495 static void
 496 scroll_to_point (EvView        *view,
 497                  gdouble        x,
 498                  gdouble        y,
 499                  GtkOrientation orientation)
 500 {
 501         gdouble page_size;
 502         gdouble upper, lower;
 503
 504         if (orientation == GTK_ORIENTATION_VERTICAL) {
 505                 page_size = gtk_adjustment_get_page_size (view->vadjustment);
 506                 upper = gtk_adjustment_get_upper (view->vadjustment);
 507                 lower = gtk_adjustment_get_lower (view->vadjustment);
 508
 509                 if (view->continuous) {
 510                         gtk_adjustment_clamp_page (view->vadjustment,
 511                                                    y - view->spacing / 2,
 512                                                    y + page_size);
 513                 } else {
 514                         gtk_adjustment_set_value (view->vadjustment,
 515                                                   CLAMP (y, lower, upper - page_size));
 516                 }
 517         } else {
 518                 page_size = gtk_adjustment_get_page_size (view->hadjustment);
 519                 upper = gtk_adjustment_get_upper (view->hadjustment);
 520                 lower = gtk_adjustment_get_lower (view->hadjustment);
 521
 522                 if (view->dual_page) {
 523                         gtk_adjustment_clamp_page (view->hadjustment, x,
 524                                                    x + page_size);
 525                 } else {
 526                         gtk_adjustment_set_value (view->hadjustment,
 527                                                   CLAMP (x, lower, upper - page_size));
 528                 }
 529         }
 530 }
 531
 532 static void
 533 ev_view_scroll_to_page_position (EvView *view, GtkOrientation orientation)
 534 {
 535         gdouble x, y;
 536
 537         if (!view->document)
 538                 return;
 539
 540         if ((orientation == GTK_ORIENTATION_VERTICAL && view->pending_point.y == 0) ||
 541             (orientation == GTK_ORIENTATION_HORIZONTAL && view->pending_point.x == 0)) {
 542                 GdkRectangle page_area;
 543                 GtkBorder    border;
 544
 545                 ev_view_get_page_extents (view, view->current_page, &page_area, &border);
 546                 x = page_area.x;
 547                 y = page_area.y;
 548         } else {
 549                 GdkPoint view_point;
 550
 551                 doc_point_to_view_point (view, view->current_page,
 552                                          &view->pending_point, &view_point);
 553                 x = view_point.x;
 554                 y = view_point.y;
 555         }
 556
 557         scroll_to_point (view, x, y, orientation);
 558 }
 559
 560 static void
 561 view_set_adjustment_values (EvView         *view,
 562                             GtkOrientation  orientation)
 563 {
 564         GtkWidget *widget = GTK_WIDGET (view);
 565         GtkAdjustment *adjustment;
 566         GtkAllocation allocation;
 567         int req_size;
 568         int alloc_size;
 569         gdouble page_size;
 570         gdouble value;
 571         gdouble upper;
 572         double factor;
 573         gint new_value;
 574
 575         gtk_widget_get_allocation (widget, &allocation);
 576
 577         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 578                 req_size = view->requisition.width;
 579                 alloc_size = allocation.width;
 580                 adjustment = view->hadjustment;
 581         } else {
 582                 req_size = view->requisition.height;
 583                 alloc_size = allocation.height;
 584                 adjustment = view->vadjustment;
 585         }
 586
 587         if (!adjustment)
 588                 return;
 589
 590         factor = 1.0;
 591         value = gtk_adjustment_get_value (adjustment);
 592         upper = gtk_adjustment_get_upper (adjustment);
 593         page_size = gtk_adjustment_get_page_size (adjustment);
 594
 595         switch (view->pending_scroll) {
 596                 case SCROLL_TO_KEEP_POSITION:
 597                 case SCROLL_TO_FIND_LOCATION:
 598                         factor = value / upper;
 599                         break;
 600                 case SCROLL_TO_PAGE_POSITION:
 601                         break;
 602                 case SCROLL_TO_CENTER:
 603                         factor = (value + page_size * 0.5) / upper;
 604                         break;
 605         }
 606
 607         upper = MAX (alloc_size, req_size);
 608         page_size = alloc_size;
 609
 610         gtk_adjustment_set_page_size (adjustment, page_size);
 611         gtk_adjustment_set_step_increment (adjustment, alloc_size * 0.1);
 612         gtk_adjustment_set_page_increment (adjustment, alloc_size * 0.9);
 613         gtk_adjustment_set_lower (adjustment, 0);
 614         gtk_adjustment_set_upper (adjustment, upper);
 615
 616         /*
 617          * We add 0.5 to the values before to average out our rounding errors.
 618          */
 619         switch (view->pending_scroll) {
 620                 case SCROLL_TO_KEEP_POSITION:
 621                 case SCROLL_TO_FIND_LOCATION:
 622                         new_value = CLAMP (upper * factor + 0.5, 0, upper - page_size);
 623                         gtk_adjustment_set_value (adjustment, (int)new_value);
 624                         break;
 625                 case SCROLL_TO_PAGE_POSITION:
 626                         ev_view_scroll_to_page_position (view, orientation);
 627                         break;
 628                 case SCROLL_TO_CENTER:
 629                         new_value = CLAMP (upper * factor - page_size * 0.5 + 0.5,
 630                                            0, upper - page_size);
 631                         gtk_adjustment_set_value (adjustment, (int)new_value);
 632                         break;
 633         }
 634
 635         gtk_adjustment_changed (adjustment);
 636 }
 637
 638 static void
 639 view_update_range_and_current_page (EvView *view)
 640 {
 641         gint start = view->start_page;
 642         gint end = view->end_page;
 643
 644         if (ev_document_get_n_pages (view->document) <= 0 ||
 645             !ev_document_check_dimensions (view->document))
 646                 return;
 647
 648         if (view->continuous) {
 649                 GdkRectangle current_area, unused, page_area;
 650                 GtkBorder border;
 651                 gboolean found = FALSE;
 652                 gint area_max = -1, area;
 653                 gint best_current_page = -1;
 654                 int i, j = 0;
 655
 656                 if (!(view->vadjustment && view->hadjustment))
 657                         return;
 658
 659                 current_area.x = gtk_adjustment_get_value (view->hadjustment);
 660                 current_area.width = gtk_adjustment_get_page_size (view->hadjustment);
 661                 current_area.y = gtk_adjustment_get_value (view->vadjustment);
 662                 current_area.height = gtk_adjustment_get_page_size (view->vadjustment);
 663
 664                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 665
 666                         ev_view_get_page_extents (view, i, &page_area, &border);
 667
 668                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 669                                 area = unused.width * unused.height;
 670
 671                                 if (!found) {
 672                                         area_max = area;
 673                                         view->start_page = i;
 674                                         found = TRUE;
 675                                         best_current_page = i;
 676                                 }
 677                                 if (area > area_max) {
 678                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 679                                         area_max = area;
 680                                 }
 681
 682                                 view->end_page = i;
 683                                 j = 0;
 684                         } else if (found && view->current_page <= view->end_page) {
 685                                 if (view->dual_page && j < 1) {
 686                                         /* In dual mode  we stop searching
 687                                          * after two consecutive non-visible pages.
 688                                          */
 689                                         j++;
 690                                         continue;
 691                                 }
 692                                 break;
 693                         }
 694                 }
 695
 696                 if (view->pending_scroll == SCROLL_TO_KEEP_POSITION) {
 697                         best_current_page = MAX (best_current_page, view->start_page);
 698
 699                         if (view->current_page != best_current_page) {
 700                                 view->current_page = best_current_page;
 701                                 hide_loading_window (view);
 702                                 ev_document_model_set_page (view->model, best_current_page);
 703                         }
 704                 }
 705         } else if (view->dual_page) {
 706                 if (view->current_page % 2 == get_dual_even_left (view)) {
 707                         view->start_page = view->current_page;
 708                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 709                                 view->end_page = view->start_page + 1;
 710                         else
 711                                 view->end_page = view->start_page;
 712                 } else {
 713                         if (view->current_page < 1)
 714                                 view->start_page = view->current_page;
 715                         else
 716                                 view->start_page = view->current_page - 1;
 717                         view->end_page = view->current_page;
 718                 }
 719         } else {
 720                 view->start_page = view->current_page;
 721                 view->end_page = view->current_page;
 722         }
 723
 724         if (view->start_page == -1 || view->end_page == -1)
 725                 return;
 726
 727         if (start != view->start_page || end != view->end_page) {
 728                 gint i;
 729
 730                 for (i = start; i < view->start_page && start != -1; i++) {
 731                         hide_annotation_windows (view, i);
 732                 }
 733
 734                 for (i = end; i > view->end_page && end != -1; i--) {
 735                         hide_annotation_windows (view, i);
 736                 }
 737         }
 738
 739         ev_page_cache_set_page_range (view->page_cache,
 740                                       view->start_page,
 741                                       view->end_page);
 742         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 743                                         view->start_page,
 744                                         view->end_page,
 745                                         view->selection_info.selections);
 746
 747         if (ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page))
 748             gtk_widget_queue_draw (GTK_WIDGET (view));
 749 }
 750
 751 static void
 752 set_scroll_adjustment (EvView *view,
 753                        GtkOrientation  orientation,
 754                        GtkAdjustment  *adjustment)
 755 {
 756         GtkAdjustment **to_set;
 757
 758         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 759                 to_set = &view->hadjustment;
 760         else
 761                 to_set = &view->vadjustment;
 762
 763         if (*to_set != adjustment) {
 764                 if (*to_set) {
 765                         g_signal_handlers_disconnect_by_func (*to_set,
 766                                                               (gpointer) on_adjustment_value_changed,
 767                                                               view);
 768                         g_object_unref (*to_set);
 769                 }
 770
 771                 *to_set = adjustment;
 772                 view_set_adjustment_values (view, orientation);
 773
 774                 if (*to_set) {
 775                         g_object_ref (*to_set);
 776                         g_signal_connect (*to_set, "value_changed",
 777                                           G_CALLBACK (on_adjustment_value_changed), view);
 778                 }
 779         }
 780 }
 781
 782 static void
 783 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 784                                 GtkAdjustment  *hadjustment,
 785                                 GtkAdjustment  *vadjustment)
 786 {
 787         EvView *view = EV_VIEW (layout);
 788
 789         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 790         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 791
 792         on_adjustment_value_changed (NULL, view);
 793 }
 794
 795 static void
 796 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 797                            guint           keyval,
 798                            GdkModifierType modifiers,
 799                            GtkScrollType   scroll,
 800                            gboolean        horizontal)
 801 {
 802   guint keypad_keyval = keyval - GDK_KEY_Left + GDK_KEY_KP_Left;
 803
 804   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 805                                 "binding_activated", 2,
 806                                 GTK_TYPE_SCROLL_TYPE, scroll,
 807                                 G_TYPE_BOOLEAN, horizontal);
 808   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 809                                 "binding_activated", 2,
 810                                 GTK_TYPE_SCROLL_TYPE, scroll,
 811                                 G_TYPE_BOOLEAN, horizontal);
 812 }
 813
 814 static gdouble
 815 compute_scroll_increment (EvView        *view,
 816                           GtkScrollType  scroll)
 817 {
 818         GtkWidget *widget = GTK_WIDGET (view);
 819         GtkAdjustment *adjustment = view->vadjustment;
 820         cairo_region_t *text_region, *region;
 821         GtkAllocation allocation;
 822         gint page;
 823         GdkRectangle rect;
 824         EvRectangle doc_rect;
 825         GdkRectangle page_area;
 826         GtkBorder border;
 827         gdouble fraction = 1.0;
 828
 829         if (scroll != GTK_SCROLL_PAGE_BACKWARD && scroll != GTK_SCROLL_PAGE_FORWARD)
 830                 return gtk_adjustment_get_page_size (adjustment);
 831
 832         page = scroll == GTK_SCROLL_PAGE_BACKWARD ? view->start_page : view->end_page;
 833
 834         text_region = ev_page_cache_get_text_mapping (view->page_cache, page);
 835         if (!text_region || cairo_region_is_empty (text_region))
 836                 return gtk_adjustment_get_page_size (adjustment);
 837
 838         gtk_widget_get_allocation (widget, &allocation);
 839         ev_view_get_page_extents (view, page, &page_area, &border);
 840         rect.x = page_area.x + view->scroll_x;
 841         rect.y = view->scroll_y + (scroll == GTK_SCROLL_PAGE_BACKWARD ? 5 : allocation.height - 5);
 842         rect.width = page_area.width;
 843         rect.height = 1;
 844         view_rect_to_doc_rect (view, &rect, &page_area, &doc_rect);
 845
 846         /* Convert the doc rectangle into a GdkRectangle */
 847         rect.x = doc_rect.x1;
 848         rect.y = doc_rect.y1;
 849         rect.width = doc_rect.x2 - doc_rect.x1;
 850         rect.height = MAX (1, doc_rect.y2 - doc_rect.y1);
 851         region = cairo_region_create_rectangle (&rect);
 852
 853         cairo_region_intersect (region, text_region);
 854         if (cairo_region_num_rectangles (region)) {
 855                 EvRenderContext *rc;
 856                 EvPage  *ev_page;
 857                 cairo_region_t *sel_region;
 858
 859                 cairo_region_get_rectangle (region, 0, &rect);
 860                 ev_page = ev_document_get_page (view->document, page);
 861                 rc = ev_render_context_new (ev_page, view->rotation, view->scale);
 862                 g_object_unref (ev_page);
 863                 /* Get the selection region to know the height of the line */
 864                 doc_rect.x1 = doc_rect.x2 = rect.x + 0.5;
 865                 doc_rect.y1 = doc_rect.y2 = rect.y + 0.5;
 866
 867                 ev_document_doc_mutex_lock ();
 868                 sel_region = ev_selection_get_selection_region (EV_SELECTION (view->document),
 869                                                                 rc, EV_SELECTION_STYLE_LINE,
 870                                                                 &doc_rect);
 871                 ev_document_doc_mutex_unlock ();
 872
 873                 g_object_unref (rc);
 874
 875                 if (cairo_region_num_rectangles (sel_region) > 0) {
 876                         cairo_region_get_rectangle (sel_region, 0, &rect);
 877                         fraction = 1 - (rect.height / gtk_adjustment_get_page_size (adjustment));
 878                 }
 879                 cairo_region_destroy (sel_region);
 880         }
 881         cairo_region_destroy (region);
 882
 883         return gtk_adjustment_get_page_size (adjustment) * fraction;
 884
 885 }
 886
 887 void
 888 ev_view_scroll (EvView        *view,
 889                 GtkScrollType  scroll,
 890                 gboolean       horizontal)
 891 {
 892         GtkAdjustment *adjustment;
 893         double value, increment;
 894         gdouble upper, lower;
 895         gdouble page_size;
 896         gdouble step_increment;
 897         gboolean first_page = FALSE;
 898         gboolean last_page = FALSE;
 899
 900         view->jump_to_find_result = FALSE;
 901
 902         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
 903                 switch (scroll) {
 904                         case GTK_SCROLL_PAGE_BACKWARD:
 905                         case GTK_SCROLL_STEP_BACKWARD:
 906                                 ev_view_previous_page (view);
 907                                 break;
 908                         case GTK_SCROLL_PAGE_FORWARD:
 909                         case GTK_SCROLL_STEP_FORWARD:
 910                                 ev_view_next_page (view);
 911                                 break;
 912                         default:
 913                                 break;
 914                 }
 915                 return;
 916         }
 917
 918         /* Assign values for increment and vertical adjustment */
 919         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 920         value = gtk_adjustment_get_value (adjustment);
 921         upper = gtk_adjustment_get_upper (adjustment);
 922         lower = gtk_adjustment_get_lower (adjustment);
 923         page_size = gtk_adjustment_get_page_size (adjustment);
 924         step_increment = gtk_adjustment_get_step_increment (adjustment);
 925
 926         /* Assign boolean for first and last page */
 927         if (view->current_page == 0)
 928                 first_page = TRUE;
 929         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 930                 last_page = TRUE;
 931
 932         switch (scroll) {
 933                 case GTK_SCROLL_PAGE_BACKWARD:
 934                         /* Do not jump backwards if at the first page */
 935                         if (value == lower && first_page) {
 936                                 /* Do nothing */
 937                                 /* At the top of a page, assign the upper bound limit of previous page */
 938                         } else if (value == lower) {
 939                                 value = upper - page_size;
 940                                 ev_view_previous_page (view);
 941                                 /* Jump to the top */
 942                         } else {
 943                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_BACKWARD);
 944                                 value = MAX (value - increment, lower);
 945                         }
 946                         break;
 947                 case GTK_SCROLL_PAGE_FORWARD:
 948                         /* Do not jump forward if at the last page */
 949                         if (value == (upper - page_size) && last_page) {
 950                                 /* Do nothing */
 951                         /* At the bottom of a page, assign the lower bound limit of next page */
 952                         } else if (value == (upper - page_size)) {
 953                                 value = 0;
 954                                 ev_view_next_page (view);
 955                         /* Jump to the bottom */
 956                         } else {
 957                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_FORWARD);
 958                                 value = MIN (value + increment, upper - page_size);
 959                         }
 960                         break;
 961                 case GTK_SCROLL_STEP_BACKWARD:
 962                         value -= step_increment;
 963                         break;
 964                 case GTK_SCROLL_STEP_FORWARD:
 965                         value += step_increment;
 966                         break;
 967                 case GTK_SCROLL_STEP_DOWN:
 968                         value -= step_increment / 10;
 969                         break;
 970                 case GTK_SCROLL_STEP_UP:
 971                         value += step_increment / 10;
 972                         break;
 973                 default:
 974                         break;
 975         }
 976
 977         value = CLAMP (value, lower, upper - page_size);
 978
 979         gtk_adjustment_set_value (adjustment, value);
 980 }
 981
 982 #define MARGIN 5
 983
 984 static void
 985 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 986 {
 987         GtkWidget *widget = GTK_WIDGET (view);
 988         GtkAdjustment *adjustment;
 989         GtkAllocation allocation;
 990         gdouble adj_value;
 991         int value;
 992
 993         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 994
 995         gtk_widget_get_allocation (widget, &allocation);
 996
 997         adjustment = view->vadjustment;
 998         adj_value = gtk_adjustment_get_value (adjustment);
 999
1000         if (rect->y < adj_value) {
1001                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->y - MARGIN);
1002                 gtk_adjustment_set_value (view->vadjustment, value);
1003         } else if (rect->y + rect->height > adj_value + allocation.height) {
1004                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->y + rect->height -
1005                              allocation.height + MARGIN);
1006                 gtk_adjustment_set_value (view->vadjustment, value);
1007         }
1008
1009         adjustment = view->hadjustment;
1010         adj_value = gtk_adjustment_get_value (adjustment);
1011
1012         if (rect->x < adj_value) {
1013                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->x - MARGIN);
1014                 gtk_adjustment_set_value (view->hadjustment, value);
1015         } else if (rect->x + rect->height > adj_value + allocation.width) {
1016                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->x + rect->width -
1017                              allocation.width + MARGIN);
1018                 gtk_adjustment_set_value (view->hadjustment, value);
1019         }
1020
1021         gtk_widget_queue_resize (GTK_WIDGET (view));
1022 }
1023
1024 /*** Geometry computations ***/
1025
1026 static void
1027 compute_border (EvView *view, int width, int height, GtkBorder *border)
1028 {
1029         ev_document_misc_get_page_border_size (width, height, border);
1030 }
1031
1032 void
1033 _get_page_size_for_scale_and_rotation (EvDocument *document,
1034                                        gint        page,
1035                                        gdouble     scale,
1036                                        gint        rotation,
1037                                        gint       *page_width,
1038                                        gint       *page_height)
1039 {
1040         gdouble w, h;
1041         gint    width, height;
1042
1043         ev_document_get_page_size (document, page, &w, &h);
1044
1045         width = (gint)(w * scale + 0.5);
1046         height = (gint)(h * scale + 0.5);
1047
1048         if (page_width)
1049                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
1050         if (page_height)
1051                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
1052 }
1053
1054 static void
1055 ev_view_get_page_size (EvView *view,
1056                        gint    page,
1057                        gint   *page_width,
1058                        gint   *page_height)
1059 {
1060         _get_page_size_for_scale_and_rotation (view->document,
1061                                                page,
1062                                                view->scale,
1063                                                view->rotation,
1064                                                page_width,
1065                                                page_height);
1066 }
1067
1068 static void
1069 ev_view_get_max_page_size (EvView *view,
1070                            gint   *max_width,
1071                            gint   *max_height)
1072 {
1073         double w, h;
1074         gint   width, height;
1075
1076         ev_document_get_max_page_size (view->document, &w, &h);
1077
1078         width = (gint)(w * view->scale + 0.5);
1079         height = (gint)(h * view->scale + 0.5);
1080
1081         if (max_width)
1082                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
1083         if (max_height)
1084                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
1085 }
1086
1087 static void
1088 get_page_y_offset (EvView *view, int page, int *y_offset)
1089 {
1090         int max_width, offset;
1091         GtkBorder border;
1092
1093         g_return_if_fail (y_offset != NULL);
1094
1095         ev_view_get_max_page_size (view, &max_width, NULL);
1096         compute_border (view, max_width, max_width, &border);
1097
1098         if (view->dual_page) {
1099                 ev_view_get_height_to_page (view, page, NULL, &offset);
1100                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
1101                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
1102         } else {
1103                 ev_view_get_height_to_page (view, page, &offset, NULL);
1104                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
1105         }
1106
1107         *y_offset = offset;
1108         return;
1109 }
1110
1111 gboolean
1112 ev_view_get_page_extents (EvView       *view,
1113                           gint          page,
1114                           GdkRectangle *page_area,
1115                           GtkBorder    *border)
1116 {
1117         GtkWidget *widget;
1118         int width, height;
1119         GtkAllocation allocation;
1120
1121         widget = GTK_WIDGET (view);
1122         gtk_widget_get_allocation (widget, &allocation);
1123
1124         /* Get the size of the page */
1125         ev_view_get_page_size (view, page, &width, &height);
1126         compute_border (view, width, height, border);
1127         page_area->width = width + border->left + border->right;
1128         page_area->height = height + border->top + border->bottom;
1129
1130         if (view->continuous) {
1131                 gint max_width;
1132                 gint x, y;
1133
1134                 ev_view_get_max_page_size (view, &max_width, NULL);
1135                 max_width = max_width + border->left + border->right;
1136                 /* Get the location of the bounding box */
1137                 if (view->dual_page) {
1138                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1139                         x = x + MAX (0, allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1140                         if (page % 2 == get_dual_even_left (view))
1141                                 x = x + (max_width - width - border->left - border->right);
1142                 } else {
1143                         x = view->spacing;
1144                         x = x + MAX (0, allocation.width - (width + view->spacing * 2)) / 2;
1145                 }
1146
1147                 get_page_y_offset (view, page, &y);
1148
1149                 page_area->x = x;
1150                 page_area->y = y;
1151         } else {
1152                 gint x, y;
1153                 if (view->dual_page) {
1154                         gint width_2, height_2;
1155                         gint max_width = width;
1156                         gint max_height = height;
1157                         GtkBorder overall_border;
1158                         gint other_page;
1159
1160                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1161
1162                         /* First, we get the bounding box of the two pages */
1163                         if (other_page < ev_document_get_n_pages (view->document)
1164                             && (0 <= other_page)) {
1165                                 ev_view_get_page_size (view, other_page,
1166                                                        &width_2, &height_2);
1167                                 if (width_2 > width)
1168                                         max_width = width_2;
1169                                 if (height_2 > height)
1170                                         max_height = height_2;
1171                         }
1172                         compute_border (view, max_width, max_height, &overall_border);
1173
1174                         /* Find the offsets */
1175                         x = view->spacing;
1176                         y = view->spacing;
1177
1178                         /* Adjust for being the left or right page */
1179                         if (page % 2 == get_dual_even_left (view))
1180                                 x = x + max_width - width;
1181                         else
1182                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1183
1184                         y = y + (max_height - height)/2;
1185
1186                         /* Adjust for extra allocation */
1187                         x = x + MAX (0, allocation.width -
1188                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1189                         y = y + MAX (0, allocation.height - (height + view->spacing * 2))/2;
1190                 } else {
1191                         x = view->spacing;
1192                         y = view->spacing;
1193
1194                         /* Adjust for extra allocation */
1195                         x = x + MAX (0, allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1196                         y = y + MAX (0, allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1197                 }
1198
1199                 page_area->x = x;
1200                 page_area->y = y;
1201         }
1202
1203         return TRUE;
1204 }
1205
1206 static void
1207 get_doc_page_size (EvView  *view,
1208                    gint     page,
1209                    gdouble *width,
1210                    gdouble *height)
1211 {
1212         double w, h;
1213
1214         ev_document_get_page_size (view->document, page, &w, &h);
1215         if (view->rotation == 0 || view->rotation == 180) {
1216                 if (width) *width = w;
1217                 if (height) *height = h;
1218         } else {
1219                 if (width) *width = h;
1220                 if (height) *height = w;
1221         }
1222 }
1223
1224 static void
1225 view_point_to_doc_point (EvView *view,
1226                          GdkPoint *view_point,
1227                          GdkRectangle *page_area,
1228                          double  *doc_point_x,
1229                          double  *doc_point_y)
1230 {
1231         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1232         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1233 }
1234
1235 static void
1236 view_rect_to_doc_rect (EvView *view,
1237                        GdkRectangle *view_rect,
1238                        GdkRectangle *page_area,
1239                        EvRectangle  *doc_rect)
1240 {
1241         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1242         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1243         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1244         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1245 }
1246
1247 static void
1248 doc_point_to_view_point (EvView       *view,
1249                          int           page,
1250                          EvPoint      *doc_point,
1251                          GdkPoint     *view_point)
1252 {
1253         GdkRectangle page_area;
1254         GtkBorder border;
1255         double x, y, view_x, view_y;
1256         gdouble width, height;
1257
1258         get_doc_page_size (view, page, &width, &height);
1259
1260         if (view->rotation == 0) {
1261                 x = doc_point->x;
1262                 y = doc_point->y;
1263         } else if (view->rotation == 90) {
1264                 x = width - doc_point->y;
1265                 y = doc_point->x;
1266         } else if (view->rotation == 180) {
1267                 x = width - doc_point->x;
1268                 y = height - doc_point->y;
1269         } else if (view->rotation == 270) {
1270                 x = doc_point->y;
1271                 y = height - doc_point->x;
1272         } else {
1273                 g_assert_not_reached ();
1274         }
1275
1276         ev_view_get_page_extents (view, page, &page_area, &border);
1277
1278         view_x = CLAMP (x * view->scale, 0, page_area.width);
1279         view_y = CLAMP (y * view->scale, 0, page_area.height);
1280         view_point->x = view_x + page_area.x;
1281         view_point->y = view_y + page_area.y;
1282 }
1283
1284 static void
1285 doc_rect_to_view_rect (EvView       *view,
1286                        int           page,
1287                        EvRectangle  *doc_rect,
1288                        GdkRectangle *view_rect)
1289 {
1290         GdkRectangle page_area;
1291         GtkBorder border;
1292         double x, y, w, h;
1293         gdouble width, height;
1294
1295         get_doc_page_size (view, page, &width, &height);
1296
1297         if (view->rotation == 0) {
1298                 x = doc_rect->x1;
1299                 y = doc_rect->y1;
1300                 w = doc_rect->x2 - doc_rect->x1;
1301                 h = doc_rect->y2 - doc_rect->y1;
1302         } else if (view->rotation == 90) {
1303                 x = width - doc_rect->y2;
1304                 y = doc_rect->x1;
1305                 w = doc_rect->y2 - doc_rect->y1;
1306                 h = doc_rect->x2 - doc_rect->x1;
1307         } else if (view->rotation == 180) {
1308                 x = width - doc_rect->x2;
1309                 y = height - doc_rect->y2;
1310                 w = doc_rect->x2 - doc_rect->x1;
1311                 h = doc_rect->y2 - doc_rect->y1;
1312         } else if (view->rotation == 270) {
1313                 x = doc_rect->y1;
1314                 y = height - doc_rect->x2;
1315                 w = doc_rect->y2 - doc_rect->y1;
1316                 h = doc_rect->x2 - doc_rect->x1;
1317         } else {
1318                 g_assert_not_reached ();
1319         }
1320
1321         ev_view_get_page_extents (view, page, &page_area, &border);
1322
1323         view_rect->x = x * view->scale + page_area.x;
1324         view_rect->y = y * view->scale + page_area.y;
1325         view_rect->width = w * view->scale;
1326         view_rect->height = h * view->scale;
1327 }
1328
1329 static gboolean
1330 get_dual_even_left (EvView *view)
1331 {
1332         return (ev_document_get_n_pages (view->document) > 2);
1333 }
1334
1335 static void
1336 find_page_at_location (EvView  *view,
1337                        gdouble  x,
1338                        gdouble  y,
1339                        gint    *page,
1340                        gint    *x_offset,
1341                        gint    *y_offset)
1342 {
1343         int i;
1344
1345         if (view->document == NULL)
1346                 return;
1347
1348         g_assert (page);
1349         g_assert (x_offset);
1350         g_assert (y_offset);
1351
1352         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1353                 GdkRectangle page_area;
1354                 GtkBorder border;
1355
1356                 if (! ev_view_get_page_extents (view, i, &page_area, &border))
1357                         continue;
1358
1359                 if ((x >= page_area.x + border.left) &&
1360                     (x < page_area.x + page_area.width - border.right) &&
1361                     (y >= page_area.y + border.top) &&
1362                     (y < page_area.y + page_area.height - border.bottom)) {
1363                         *page = i;
1364                         *x_offset = x - (page_area.x + border.left);
1365                         *y_offset = y - (page_area.y + border.top);
1366                         return;
1367                 }
1368         }
1369
1370         *page = -1;
1371 }
1372
1373 static gboolean
1374 location_in_text (EvView  *view,
1375                   gdouble  x,
1376                   gdouble  y)
1377 {
1378         cairo_region_t *region;
1379         gint page = -1;
1380         gint x_offset = 0, y_offset = 0;
1381
1382         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1383
1384         if (page == -1)
1385                 return FALSE;
1386
1387         region = ev_page_cache_get_text_mapping (view->page_cache, page);
1388
1389         if (region)
1390                 return cairo_region_contains_point (region, x_offset / view->scale, y_offset / view->scale);
1391         else
1392                 return FALSE;
1393 }
1394
1395 static gboolean
1396 location_in_selected_text (EvView  *view,
1397                            gdouble  x,
1398                            gdouble  y)
1399 {
1400         gint page = -1;
1401         gint x_offset = 0, y_offset = 0;
1402         EvViewSelection *selection;
1403         GList *l = NULL;
1404
1405         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1406                 selection = (EvViewSelection *)l->data;
1407
1408                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1409
1410                 if (page != selection->page)
1411                         continue;
1412
1413                 if (selection->covered_region &&
1414                     cairo_region_contains_point (selection->covered_region, x_offset, y_offset))
1415                         return TRUE;
1416         }
1417
1418         return FALSE;
1419 }
1420
1421 static gboolean
1422 get_doc_point_from_offset (EvView *view,
1423                            gint    page,
1424                            gint    x_offset,
1425                            gint    y_offset,
1426                            gint   *x_new,
1427                            gint   *y_new)
1428 {
1429         gdouble width, height;
1430         double x, y;
1431
1432         get_doc_page_size (view, page, &width, &height);
1433
1434         x_offset = x_offset / view->scale;
1435         y_offset = y_offset / view->scale;
1436
1437         if (view->rotation == 0) {
1438                 x = x_offset;
1439                 y = y_offset;
1440         } else if (view->rotation == 90) {
1441                 x = y_offset;
1442                 y = width - x_offset;
1443         } else if (view->rotation == 180) {
1444                 x = width - x_offset;
1445                 y = height - y_offset;
1446         } else if (view->rotation == 270) {
1447                 x = height - y_offset;
1448                 y = x_offset;
1449         } else {
1450                 g_assert_not_reached ();
1451         }
1452
1453         *x_new = x;
1454         *y_new = y;
1455
1456         return TRUE;
1457 }
1458
1459 static gboolean
1460 get_doc_point_from_location (EvView  *view,
1461                              gdouble  x,
1462                              gdouble  y,
1463                              gint    *page,
1464                              gint    *x_new,
1465                              gint    *y_new)
1466 {
1467         gint x_offset = 0, y_offset = 0;
1468
1469         x += view->scroll_x;
1470         y += view->scroll_y;
1471         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1472         if (*page == -1)
1473                 return FALSE;
1474
1475         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1476 }
1477
1478 static void
1479 ev_view_get_area_from_mapping (EvView        *view,
1480                                guint          page,
1481                                EvMappingList *mapping_list,
1482                                gconstpointer  data,
1483                                GdkRectangle  *area)
1484 {
1485         EvMapping *mapping;
1486
1487         mapping = ev_mapping_list_find (mapping_list, data);
1488         doc_rect_to_view_rect (view, page, &mapping->area, area);
1489         area->x -= view->scroll_x;
1490         area->y -= view->scroll_y;
1491 }
1492
1493
1494 /*** Hyperref ***/
1495 static EvLink *
1496 ev_view_get_link_at_location (EvView  *view,
1497                               gdouble  x,
1498                               gdouble  y)
1499 {
1500         gint page = -1;
1501         gint x_new = 0, y_new = 0;
1502         EvMappingList *link_mapping;
1503
1504         if (!EV_IS_DOCUMENT_LINKS (view->document))
1505                 return NULL;
1506
1507         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1508                 return NULL;
1509
1510         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
1511
1512         if (link_mapping)
1513                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1514         else
1515                 return NULL;
1516 }
1517
1518 static void
1519 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1520 {
1521         EvPoint doc_point;
1522         gdouble zoom, left, top;
1523         gboolean change_left, change_top;
1524         GtkAllocation allocation;
1525
1526         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1527
1528         left = ev_link_dest_get_left (dest, &change_left);
1529         top = ev_link_dest_get_top (dest, &change_top);
1530
1531         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1532                                        ev_link_dest_get_bottom (dest) - top,
1533                                        allocation.width,
1534                                        allocation.height);
1535
1536         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1537         ev_document_model_set_scale (view->model, zoom);
1538
1539         doc_point.x = change_left ? left : 0;
1540         doc_point.y = change_top ? top : 0;
1541         view->pending_point = doc_point;
1542
1543         ev_view_change_page (view, ev_link_dest_get_page (dest));
1544 }
1545
1546 static void
1547 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1548 {
1549         EvPoint doc_point;
1550         gdouble doc_width, doc_height;
1551         gint page;
1552         double zoom, left;
1553         gboolean change_left;
1554         GtkAllocation allocation;
1555
1556         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1557
1558         page = ev_link_dest_get_page (dest);
1559         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1560
1561         left = ev_link_dest_get_left (dest, &change_left);
1562         doc_point.x = change_left ? left : 0;
1563         doc_point.y = 0;
1564
1565         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1566                                          allocation.width,
1567                                          allocation.height);
1568
1569         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1570         ev_document_model_set_scale (view->model, zoom);
1571
1572         view->pending_point = doc_point;
1573
1574         ev_view_change_page (view, page);
1575 }
1576
1577 static void
1578 goto_fith_dest (EvView *view, EvLinkDest *dest)
1579 {
1580         EvPoint doc_point;
1581         gdouble doc_width, doc_height;
1582         gint page;
1583         gdouble zoom, top;
1584         gboolean change_top;
1585         GtkAllocation allocation;
1586
1587         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1588
1589         page = ev_link_dest_get_page (dest);
1590         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1591
1592         top = ev_link_dest_get_top (dest, &change_top);
1593
1594         doc_point.x = 0;
1595         doc_point.y = change_top ? top : 0;
1596
1597         zoom = zoom_for_size_fit_width (doc_width, top,
1598                                         allocation.width,
1599                                         allocation.height);
1600
1601         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1602         ev_document_model_set_scale (view->model, zoom);
1603
1604         view->pending_point = doc_point;
1605
1606         ev_view_change_page (view, page);
1607 }
1608
1609 static void
1610 goto_fit_dest (EvView *view, EvLinkDest *dest)
1611 {
1612         double zoom;
1613         gdouble doc_width, doc_height;
1614         int page;
1615         GtkAllocation allocation;
1616
1617         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1618
1619         page = ev_link_dest_get_page (dest);
1620         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1621
1622         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1623                                        allocation.width,
1624                                        allocation.height);
1625
1626         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1627         ev_document_model_set_scale (view->model, zoom);
1628
1629         ev_view_change_page (view, page);
1630 }
1631
1632 static void
1633 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1634 {
1635         EvPoint doc_point;
1636         gint page;
1637         gdouble zoom, left, top;
1638         gboolean change_zoom, change_left, change_top;
1639
1640         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1641         page = ev_link_dest_get_page (dest);
1642
1643         if (change_zoom && zoom > 1) {
1644                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1645                 ev_document_model_set_scale (view->model, zoom);
1646         }
1647
1648         left = ev_link_dest_get_left (dest, &change_left);
1649         top = ev_link_dest_get_top (dest, &change_top);
1650
1651         doc_point.x = change_left ? left : 0;
1652         doc_point.y = change_top ? top : 0;
1653         view->pending_point = doc_point;
1654
1655         ev_view_change_page (view, page);
1656 }
1657
1658 static void
1659 goto_dest (EvView *view, EvLinkDest *dest)
1660 {
1661         EvLinkDestType type;
1662         int page, n_pages, current_page;
1663
1664         page = ev_link_dest_get_page (dest);
1665         n_pages = ev_document_get_n_pages (view->document);
1666
1667         if (page < 0 || page >= n_pages)
1668                 return;
1669
1670         current_page = view->current_page;
1671
1672         type = ev_link_dest_get_dest_type (dest);
1673
1674         switch (type) {
1675                 case EV_LINK_DEST_TYPE_PAGE:
1676                         ev_document_model_set_page (view->model, page);
1677                         break;
1678                 case EV_LINK_DEST_TYPE_FIT:
1679                         goto_fit_dest (view, dest);
1680                         break;
1681                 case EV_LINK_DEST_TYPE_FITH:
1682                         goto_fith_dest (view, dest);
1683                         break;
1684                 case EV_LINK_DEST_TYPE_FITV:
1685                         goto_fitv_dest (view, dest);
1686                         break;
1687                 case EV_LINK_DEST_TYPE_FITR:
1688                         goto_fitr_dest (view, dest);
1689                         break;
1690                 case EV_LINK_DEST_TYPE_XYZ:
1691                         goto_xyz_dest (view, dest);
1692                         break;
1693                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1694                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1695                         break;
1696                 default:
1697                         g_assert_not_reached ();
1698         }
1699
1700         if (current_page != view->current_page)
1701                 ev_document_model_set_page (view->model, view->current_page);
1702 }
1703
1704 static void
1705 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1706 {
1707         EvLinkDestType type;
1708
1709         type = ev_link_dest_get_dest_type (dest);
1710
1711         if (type == EV_LINK_DEST_TYPE_NAMED) {
1712                 EvLinkDest  *dest2;
1713                 const gchar *named_dest;
1714
1715                 named_dest = ev_link_dest_get_named_dest (dest);
1716                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1717                                                           named_dest);
1718                 if (dest2) {
1719                         goto_dest (view, dest2);
1720                         g_object_unref (dest2);
1721                 }
1722
1723                 return;
1724         }
1725
1726         goto_dest (view, dest);
1727 }
1728
1729 void
1730 ev_view_handle_link (EvView *view, EvLink *link)
1731 {
1732         EvLinkAction    *action = NULL;
1733         EvLinkActionType type;
1734
1735         action = ev_link_get_action (link);
1736         if (!action)
1737                 return;
1738
1739         type = ev_link_action_get_action_type (action);
1740
1741         switch (type) {
1742                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1743                         EvLinkDest *dest;
1744
1745                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1746
1747                         dest = ev_link_action_get_dest (action);
1748                         ev_view_goto_dest (view, dest);
1749                 }
1750                         break;
1751                 case EV_LINK_ACTION_TYPE_LAYERS_STATE: {
1752                         GList            *show, *hide, *toggle;
1753                         GList            *l;
1754                         EvDocumentLayers *document_layers;
1755
1756                         document_layers = EV_DOCUMENT_LAYERS (view->document);
1757
1758                         show = ev_link_action_get_show_list (action);
1759                         for (l = show; l; l = g_list_next (l)) {
1760                                 ev_document_layers_show_layer (document_layers, EV_LAYER (l->data));
1761                         }
1762
1763                         hide = ev_link_action_get_hide_list (action);
1764                         for (l = hide; l; l = g_list_next (l)) {
1765                                 ev_document_layers_hide_layer (document_layers, EV_LAYER (l->data));
1766                         }
1767
1768                         toggle = ev_link_action_get_toggle_list (action);
1769                         for (l = toggle; l; l = g_list_next (l)) {
1770                                 EvLayer *layer = EV_LAYER (l->data);
1771
1772                                 if (ev_document_layers_layer_is_visible (document_layers, layer)) {
1773                                         ev_document_layers_hide_layer (document_layers, layer);
1774                                 } else {
1775                                         ev_document_layers_show_layer (document_layers, layer);
1776                                 }
1777                         }
1778
1779                         g_signal_emit (view, signals[SIGNAL_LAYERS_CHANGED], 0);
1780                         ev_view_reload_page (view, view->current_page, NULL);
1781                 }
1782                         break;
1783                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1784                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1785                 case EV_LINK_ACTION_TYPE_LAUNCH:
1786                 case EV_LINK_ACTION_TYPE_NAMED:
1787                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1788                         break;
1789         }
1790 }
1791
1792 static char *
1793 tip_from_action_named (EvLinkAction *action)
1794 {
1795         const gchar *name = ev_link_action_get_name (action);
1796
1797         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1798                 return g_strdup (_("Go to first page"));
1799         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1800                 return g_strdup (_("Go to previous page"));
1801         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1802                 return g_strdup (_("Go to next page"));
1803         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1804                 return g_strdup (_("Go to last page"));
1805         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1806                 return g_strdup (_("Go to page"));
1807         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1808                 return g_strdup (_("Find"));
1809         }
1810
1811         return NULL;
1812 }
1813
1814 static char *
1815 tip_from_link (EvView *view, EvLink *link)
1816 {
1817         EvLinkAction *action;
1818         EvLinkActionType type;
1819         char *msg = NULL;
1820         char *page_label;
1821         const char *title;
1822
1823         action = ev_link_get_action (link);
1824         title = ev_link_get_title (link);
1825
1826         if (!action)
1827                 return title ? g_strdup (title) : NULL;
1828
1829         type = ev_link_action_get_action_type (action);
1830
1831         switch (type) {
1832                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1833                         page_label = ev_document_links_get_dest_page_label (EV_DOCUMENT_LINKS (view->document),
1834                                                                             ev_link_action_get_dest (action));
1835                         if (page_label) {
1836                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1837                                 g_free (page_label);
1838                         }
1839                         break;
1840                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1841                         if (title) {
1842                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1843                                                        ev_link_action_get_filename (action));
1844                         } else {
1845                                 msg = g_strdup_printf (_("Go to file “%s”"),
1846                                                        ev_link_action_get_filename (action));
1847                         }
1848                         break;
1849                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1850                         msg = g_strdup (ev_link_action_get_uri (action));
1851                         break;
1852                 case EV_LINK_ACTION_TYPE_LAUNCH:
1853                         msg = g_strdup_printf (_("Launch %s"),
1854                                                ev_link_action_get_filename (action));
1855                         break;
1856                 case EV_LINK_ACTION_TYPE_NAMED:
1857                         msg = tip_from_action_named (action);
1858                         break;
1859                 default:
1860                         if (title)
1861                                 msg = g_strdup (title);
1862                         break;
1863         }
1864
1865         return msg;
1866 }
1867
1868 static void
1869 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1870 {
1871         EvLink       *link;
1872         EvFormField  *field;
1873         EvAnnotation *annot = NULL;
1874
1875         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1876                 return;
1877
1878         if (view->adding_annot) {
1879                 if (view->cursor != EV_VIEW_CURSOR_ADD)
1880                         ev_view_set_cursor (view, EV_VIEW_CURSOR_ADD);
1881                 return;
1882         }
1883
1884         if (view->drag_info.in_drag) {
1885                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1886                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1887                 return;
1888         }
1889
1890         if (view->scroll_info.autoscrolling) {
1891                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1892                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1893                 return;
1894         }
1895
1896         link = ev_view_get_link_at_location (view, x, y);
1897         if (link) {
1898                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1899         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1900                 if (field->is_read_only) {
1901                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1902                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1903                             view->cursor == EV_VIEW_CURSOR_DRAG)
1904                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1905                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1906                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1907                 } else {
1908                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1909                 }
1910         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1911                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1912         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1913                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1914         } else {
1915                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1916                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1917                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1918                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL ||
1919                     view->cursor == EV_VIEW_CURSOR_ADD)
1920                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1921         }
1922
1923         if (link || annot)
1924                 g_object_set (view, "has-tooltip", TRUE, NULL);
1925 }
1926
1927 /*** Images ***/
1928 static EvImage *
1929 ev_view_get_image_at_location (EvView  *view,
1930                                gdouble  x,
1931                                gdouble  y)
1932 {
1933         gint page = -1;
1934         gint x_new = 0, y_new = 0;
1935         EvMappingList *image_mapping;
1936
1937         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1938                 return NULL;
1939
1940         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1941                 return NULL;
1942
1943         image_mapping = ev_page_cache_get_image_mapping (view->page_cache, page);
1944
1945         if (image_mapping)
1946                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1947         else
1948                 return NULL;
1949 }
1950
1951 /*** Forms ***/
1952 static EvFormField *
1953 ev_view_get_form_field_at_location (EvView  *view,
1954                                     gdouble  x,
1955                                     gdouble  y)
1956 {
1957         gint page = -1;
1958         gint x_new = 0, y_new = 0;
1959         EvMappingList *forms_mapping;
1960
1961         if (!EV_IS_DOCUMENT_FORMS (view->document))
1962                 return NULL;
1963
1964         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1965                 return NULL;
1966
1967         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache, page);
1968
1969         if (forms_mapping)
1970                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1971         else
1972                 return NULL;
1973 }
1974
1975 static cairo_region_t *
1976 ev_view_form_field_get_region (EvView      *view,
1977                                EvFormField *field)
1978 {
1979         GdkRectangle   view_area;
1980         EvMappingList *forms_mapping;
1981
1982         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
1983                                                               field->page->index);
1984         ev_view_get_area_from_mapping (view, field->page->index,
1985                                        forms_mapping,
1986                                        field, &view_area);
1987
1988         return cairo_region_create_rectangle (&view_area);
1989 }
1990
1991 static gboolean
1992 ev_view_forms_remove_widgets (EvView *view)
1993 {
1994         ev_view_remove_all (view);
1995
1996         return FALSE;
1997 }
1998
1999 static void
2000 ev_view_form_field_destroy (GtkWidget *widget,
2001                             EvView    *view)
2002 {
2003         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
2004 }
2005
2006 static GtkWidget *
2007 ev_view_form_field_button_create_widget (EvView      *view,
2008                                          EvFormField *field)
2009 {
2010         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
2011         cairo_region_t    *field_region = NULL;
2012
2013         switch (field_button->type) {
2014                 case EV_FORM_FIELD_BUTTON_PUSH:
2015                         return NULL;
2016                 case EV_FORM_FIELD_BUTTON_CHECK:
2017                 case EV_FORM_FIELD_BUTTON_RADIO: {
2018                         gboolean       state;
2019                         EvMappingList *forms_mapping;
2020                         GList         *l;
2021
2022                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
2023                                                                                field);
2024
2025                         /* FIXME: it actually depends on NoToggleToOff flags */
2026                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
2027                             state && field_button->state)
2028                                 return NULL;
2029
2030                         field_region = ev_view_form_field_get_region (view, field);
2031
2032                         /* For radio buttons and checkbox buttons that are in a set
2033                          * we need to update also the region for the current selected item
2034                          */
2035                         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2036                                                                               field->page->index);
2037                         for (l = ev_mapping_list_get_list (forms_mapping); l; l = g_list_next (l)) {
2038                                 EvFormField *button = ((EvMapping *)(l->data))->data;
2039                                 cairo_region_t *button_region;
2040
2041                                 if (button->id == field->id)
2042                                         continue;
2043
2044                                 /* FIXME: only buttons in the same group should be updated */
2045                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
2046                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
2047                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
2048                                         continue;
2049
2050                                 button_region = ev_view_form_field_get_region (view, button);
2051                                 cairo_region_union (field_region, button_region);
2052                                 cairo_region_destroy (button_region);
2053                         }
2054
2055                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
2056                                                                        field, !state);
2057                         field_button->state = !state;
2058                 }
2059                         break;
2060         }
2061
2062         ev_view_reload_page (view, field->page->index, field_region);
2063         cairo_region_destroy (field_region);
2064
2065         return NULL;
2066 }
2067
2068 static void
2069 ev_view_form_field_text_save (EvView    *view,
2070                               GtkWidget *widget)
2071 {
2072         EvFormField *field;
2073
2074         if (!view->document)
2075                 return;
2076
2077         field = g_object_get_data (G_OBJECT (widget), "form-field");
2078
2079         if (field->changed) {
2080                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2081                 cairo_region_t  *field_region;
2082
2083                 field_region = ev_view_form_field_get_region (view, field);
2084
2085                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
2086                                                             field, field_text->text);
2087                 field->changed = FALSE;
2088                 ev_view_reload_page (view, field->page->index, field_region);
2089                 cairo_region_destroy (field_region);
2090         }
2091 }
2092
2093 static void
2094 ev_view_form_field_text_changed (GtkWidget   *widget,
2095                                  EvFormField *field)
2096 {
2097         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2098         gchar           *text = NULL;
2099
2100         if (GTK_IS_ENTRY (widget)) {
2101                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
2102         } else if (GTK_IS_TEXT_BUFFER (widget)) {
2103                 GtkTextIter start, end;
2104
2105                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
2106                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
2107                                                  &start, &end, FALSE);
2108         }
2109
2110         if (!field_text->text ||
2111             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
2112                 g_free (field_text->text);
2113                 field_text->text = text;
2114                 field->changed = TRUE;
2115         }
2116 }
2117
2118 static GtkWidget *
2119 ev_view_form_field_text_create_widget (EvView      *view,
2120                                        EvFormField *field)
2121 {
2122         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2123         GtkWidget       *text = NULL;
2124         gchar           *txt;
2125
2126         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2127                                                           field);
2128
2129         switch (field_text->type) {
2130                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2131                         /* TODO */
2132                 case EV_FORM_FIELD_TEXT_NORMAL:
2133                         text = gtk_entry_new ();
2134                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2135                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2136                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2137
2138                         if (txt) {
2139                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2140                                 g_free (txt);
2141                         }
2142
2143                         g_signal_connect (text, "changed",
2144                                           G_CALLBACK (ev_view_form_field_text_changed),
2145                                           field);
2146                         g_signal_connect_after (text, "activate",
2147                                                 G_CALLBACK (ev_view_form_field_destroy),
2148                                                 view);
2149                         break;
2150                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2151                         GtkTextBuffer *buffer;
2152
2153                         text = gtk_text_view_new ();
2154                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2155
2156                         if (txt) {
2157                                 gtk_text_buffer_set_text (buffer, txt, -1);
2158                                 g_free (txt);
2159                         }
2160
2161                         g_signal_connect (buffer, "changed",
2162                                           G_CALLBACK (ev_view_form_field_text_changed),
2163                                           field);
2164                 }
2165                         break;
2166         }
2167
2168         g_object_weak_ref (G_OBJECT (text),
2169                            (GWeakNotify)ev_view_form_field_text_save,
2170                            view);
2171
2172         return text;
2173 }
2174
2175 static void
2176 ev_view_form_field_choice_save (EvView    *view,
2177                                 GtkWidget *widget)
2178 {
2179         EvFormField *field;
2180
2181         if (!view->document)
2182                 return;
2183
2184         field = g_object_get_data (G_OBJECT (widget), "form-field");
2185
2186         if (field->changed) {
2187                 GList             *l;
2188                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2189                 cairo_region_t    *field_region;
2190
2191                 field_region = ev_view_form_field_get_region (view, field);
2192
2193                 if (field_choice->is_editable) {
2194                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2195                                                                       field, field_choice->text);
2196                 } else {
2197                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2198                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2199                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2200                                                                                  field,
2201                                                                                  GPOINTER_TO_INT (l->data));
2202                         }
2203                 }
2204                 field->changed = FALSE;
2205                 ev_view_reload_page (view, field->page->index, field_region);
2206                 cairo_region_destroy (field_region);
2207         }
2208 }
2209
2210 static void
2211 ev_view_form_field_choice_changed (GtkWidget   *widget,
2212                                    EvFormField *field)
2213 {
2214         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2215
2216         if (GTK_IS_COMBO_BOX (widget)) {
2217                 gint item;
2218
2219                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2220                 if (!field_choice->selected_items ||
2221                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2222                         g_list_free (field_choice->selected_items);
2223                         field_choice->selected_items = NULL;
2224                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2225                                                                        GINT_TO_POINTER (item));
2226                         field->changed = TRUE;
2227                 }
2228
2229                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
2230                         gchar *text;
2231
2232                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
2233                         if (!field_choice->text ||
2234                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2235                                 g_free (field_choice->text);
2236                                 field_choice->text = text;
2237                                 field->changed = TRUE;
2238                         }
2239                 }
2240         } else if (GTK_IS_TREE_SELECTION (widget)) {
2241                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2242                 GtkTreeModel     *model;
2243                 GList            *items, *l;
2244
2245                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2246                 g_list_free (field_choice->selected_items);
2247                 field_choice->selected_items = NULL;
2248
2249                 for (l = items; l && l->data; l = g_list_next (l)) {
2250                         GtkTreeIter  iter;
2251                         GtkTreePath *path = (GtkTreePath *)l->data;
2252                         gint         item;
2253
2254                         gtk_tree_model_get_iter (model, &iter, path);
2255                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2256
2257                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2258                                                                        GINT_TO_POINTER (item));
2259
2260                         gtk_tree_path_free (path);
2261                 }
2262
2263                 g_list_free (items);
2264
2265                 field->changed = TRUE;
2266         }
2267 }
2268
2269 static GtkWidget *
2270 ev_view_form_field_choice_create_widget (EvView      *view,
2271                                          EvFormField *field)
2272 {
2273         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2274         GtkWidget         *choice;
2275         GtkTreeModel      *model;
2276         gint               n_items, i;
2277         gint               selected_item = 0;
2278
2279         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2280                                                                    field);
2281         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2282         for (i = 0; i < n_items; i++) {
2283                 GtkTreeIter iter;
2284                 gchar      *item;
2285
2286                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2287                                                                      field, i);
2288                 if (ev_document_forms_form_field_choice_is_item_selected (
2289                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2290                         selected_item = i;
2291                         /* FIXME: we need a get_selected_items function in poppler */
2292                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2293                                                                        GINT_TO_POINTER (i));
2294                 }
2295
2296                 if (item) {
2297                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2298                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2299                                             0, item,
2300                                             1, i,
2301                                             -1);
2302                         g_free (item);
2303                 }
2304         }
2305
2306         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2307                 GtkCellRenderer  *renderer;
2308                 GtkWidget        *tree_view;
2309                 GtkTreeSelection *selection;
2310
2311                 tree_view = gtk_tree_view_new_with_model (model);
2312                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2313
2314                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2315                 if (field_choice->multi_select) {
2316                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2317                 }
2318
2319                 /* TODO: set selected items */
2320
2321                 renderer = gtk_cell_renderer_text_new ();
2322                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2323                                                              0,
2324                                                              "choix", renderer,
2325                                                              "text", 0,
2326                                                              NULL);
2327
2328                 choice = gtk_scrolled_window_new (NULL, NULL);
2329                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2330                                                 GTK_POLICY_AUTOMATIC,
2331                                                 GTK_POLICY_AUTOMATIC);
2332                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2333                 gtk_widget_show (tree_view);
2334
2335                 g_signal_connect (selection, "changed",
2336                                   G_CALLBACK (ev_view_form_field_choice_changed),
2337                                   field);
2338                 g_signal_connect_after (selection, "changed",
2339                                         G_CALLBACK (ev_view_form_field_destroy),
2340                                         view);
2341         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2342                 gchar *text;
2343
2344                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2345                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2346                 if (text) {
2347                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2348                         g_free (text);
2349                 }
2350
2351                 g_signal_connect (choice, "changed",
2352                                   G_CALLBACK (ev_view_form_field_choice_changed),
2353                                   field);
2354                 g_signal_connect_after (gtk_bin_get_child (GTK_BIN (choice)),
2355                                         "activate",
2356                                         G_CALLBACK (ev_view_form_field_destroy),
2357                                         view);
2358         } else { /* ComboBoxText */
2359                 GtkCellRenderer *renderer;
2360
2361                 choice = gtk_combo_box_new_with_model (model);
2362                 renderer = gtk_cell_renderer_text_new ();
2363                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2364                                             renderer, TRUE);
2365                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2366                                                 renderer,
2367                                                 "text", 0,
2368                                                 NULL);
2369                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2370                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2371
2372                 g_signal_connect (choice, "changed",
2373                                   G_CALLBACK (ev_view_form_field_choice_changed),
2374                                   field);
2375                 g_signal_connect_after (choice, "changed",
2376                                         G_CALLBACK (ev_view_form_field_destroy),
2377                                         view);
2378         }
2379
2380         g_object_unref (model);
2381
2382         g_object_weak_ref (G_OBJECT (choice),
2383                            (GWeakNotify)ev_view_form_field_choice_save,
2384                            view);
2385
2386         return choice;
2387 }
2388
2389 static void
2390 ev_view_handle_form_field (EvView      *view,
2391                            EvFormField *field,
2392                            gdouble      x,
2393                            gdouble      y)
2394 {
2395         GtkWidget     *field_widget = NULL;
2396         EvMappingList *form_field_mapping;
2397         GdkRectangle   view_area;
2398
2399         if (field->is_read_only)
2400                 return;
2401
2402         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2403                 field_widget = ev_view_form_field_button_create_widget (view, field);
2404         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2405                 field_widget = ev_view_form_field_text_create_widget (view, field);
2406         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2407                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2408         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2409                 /* TODO */
2410         }
2411
2412         /* Form field doesn't require a widget */
2413         if (!field_widget)
2414                 return;
2415
2416         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2417                                 g_object_ref (field),
2418                                 (GDestroyNotify)g_object_unref);
2419
2420         form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2421                                                                    field->page->index);
2422         ev_view_get_area_from_mapping (view, field->page->index,
2423                                        form_field_mapping,
2424                                        field, &view_area);
2425
2426         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2427         gtk_widget_show (field_widget);
2428         gtk_widget_grab_focus (field_widget);
2429 }
2430
2431 /* Annotations */
2432 static EvViewWindowChild *
2433 ev_view_get_window_child (EvView    *view,
2434                           GtkWidget *window)
2435 {
2436         GList *children = view->window_children;
2437
2438         while (children) {
2439                 EvViewWindowChild *child;
2440
2441                 child = (EvViewWindowChild *)children->data;
2442                 children = children->next;
2443
2444                 if (child->window == window)
2445                         return child;
2446         }
2447
2448         return NULL;
2449 }
2450
2451 static void
2452 ev_view_window_child_move (EvView            *view,
2453                            EvViewWindowChild *child,
2454                            gint               x,
2455                            gint               y)
2456 {
2457         GtkAllocation allocation;
2458         gint          width, height;
2459
2460         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
2461         gtk_window_get_size (GTK_WINDOW (child->window), &width, &height);
2462
2463         child->x = x;
2464         child->y = y;
2465         gtk_window_move (GTK_WINDOW (child->window),
2466                          CLAMP (x, child->parent_x,
2467                                 child->parent_x + allocation.width - width),
2468                          CLAMP (y, child->parent_y,
2469                                 child->parent_y + allocation.height - height));
2470 }
2471
2472 static void
2473 ev_view_window_child_move_with_parent (EvView    *view,
2474                                        GtkWidget *window)
2475 {
2476         EvViewWindowChild *child;
2477         gint               root_x, root_y;
2478
2479         child = ev_view_get_window_child (view, window);
2480         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2481                                &root_x, &root_y);
2482         if (root_x != child->parent_x || root_y != child->parent_y) {
2483                 gint dest_x, dest_y;
2484
2485                 dest_x = child->x + (root_x - child->parent_x);
2486                 dest_y = child->y + (root_y - child->parent_y);
2487                 child->parent_x = root_x;
2488                 child->parent_y = root_y;
2489                 ev_view_window_child_move (view, child, dest_x, dest_y);
2490         }
2491
2492         if (child->visible && !gtk_widget_get_visible (window))
2493                 gtk_widget_show (window);
2494 }
2495
2496 static void
2497 ev_view_window_child_put (EvView    *view,
2498                           GtkWidget *window,
2499                           guint      page,
2500                           gint       x,
2501                           gint       y,
2502                           gdouble    orig_x,
2503                           gdouble    orig_y)
2504 {
2505         EvViewWindowChild *child;
2506         gint               root_x, root_y;
2507
2508         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2509                                &root_x, &root_y);
2510
2511         child = g_new0 (EvViewWindowChild, 1);
2512         child->window = window;
2513         child->page = page;
2514         child->orig_x = orig_x;
2515         child->orig_y = orig_y;
2516         child->parent_x = root_x;
2517         child->parent_y = root_y;
2518         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2519         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2520
2521         if (child->visible)
2522                 gtk_widget_show (window);
2523         else
2524                 gtk_widget_hide (window);
2525
2526         view->window_children = g_list_append (view->window_children, child);
2527 }
2528
2529 static EvViewWindowChild *
2530 ev_view_find_window_child_for_annot (EvView       *view,
2531                                      guint         page,
2532                                      EvAnnotation *annot)
2533 {
2534         GList *children = view->window_children;
2535
2536         while (children) {
2537                 EvViewWindowChild *child;
2538                 EvAnnotation      *wannot;
2539
2540                 child = (EvViewWindowChild *)children->data;
2541                 children = children->next;
2542
2543                 if (child->page != page)
2544                         continue;
2545
2546                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2547                 if (ev_annotation_equal (wannot, annot))
2548                         return child;
2549         }
2550
2551         return NULL;
2552 }
2553
2554 static void
2555 ev_view_window_children_free (EvView *view)
2556 {
2557         GList *l;
2558
2559         if (!view->window_children)
2560                 return;
2561
2562         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2563                 EvViewWindowChild *child;
2564
2565                 child = (EvViewWindowChild *)l->data;
2566                 gtk_widget_destroy (GTK_WIDGET (child->window));
2567                 g_free (child);
2568         }
2569         g_list_free (view->window_children);
2570         view->window_children = NULL;
2571         view->window_child_focus = NULL;
2572 }
2573
2574 static void
2575 annotation_window_grab_focus (GtkWidget *widget,
2576                               EvView    *view)
2577 {
2578         if (view->window_child_focus)
2579                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2580         view->window_child_focus = ev_view_get_window_child (view, widget);
2581 }
2582
2583 static void
2584 annotation_window_closed (EvAnnotationWindow *window,
2585                           EvView             *view)
2586 {
2587         EvViewWindowChild *child;
2588
2589         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2590         child->visible = FALSE;
2591 }
2592
2593 static void
2594 annotation_window_moved (EvAnnotationWindow *window,
2595                          gint                x,
2596                          gint                y,
2597                          EvView             *view)
2598 {
2599         EvViewWindowChild *child;
2600         GdkRectangle       page_area;
2601         GtkBorder          border;
2602         GdkRectangle       view_rect;
2603         EvRectangle        doc_rect;
2604         gint               width, height;
2605
2606         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2607         if (child->x == x && child->y == y)
2608                 return;
2609
2610         child->moved = TRUE;
2611         child->x = x;
2612         child->y = y;
2613
2614         /* Window has been moved by the user,
2615          * we have to set a new origin in doc coords
2616          */
2617         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2618         view_rect.x = (x - child->parent_x) + view->scroll_x;
2619         view_rect.y = (y - child->parent_y) + view->scroll_y;
2620         view_rect.width = width;
2621         view_rect.height = height;
2622
2623         ev_view_get_page_extents (view, child->page, &page_area, &border);
2624         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2625         child->orig_x = doc_rect.x1;
2626         child->orig_y = doc_rect.y1;
2627 }
2628
2629 static void
2630 ev_view_annotation_save_contents (EvView       *view,
2631                                   GParamSpec   *pspec,
2632                                   EvAnnotation *annot)
2633 {
2634         if (!view->document)
2635                 return;
2636
2637         ev_document_doc_mutex_lock ();
2638         ev_document_annotations_save_annotation (EV_DOCUMENT_ANNOTATIONS (view->document),
2639                                                  annot, EV_ANNOTATIONS_SAVE_CONTENTS);
2640         ev_document_doc_mutex_unlock ();
2641 }
2642
2643 static GtkWidget *
2644 ev_view_create_annotation_window (EvView       *view,
2645                                   EvAnnotation *annot,
2646                                   GtkWindow    *parent)
2647 {
2648         GtkWidget   *window;
2649         EvRectangle  doc_rect;
2650         GdkRectangle view_rect;
2651         guint        page;
2652
2653         window = ev_annotation_window_new (annot, parent);
2654         g_signal_connect (window, "grab_focus",
2655                           G_CALLBACK (annotation_window_grab_focus),
2656                           view);
2657         g_signal_connect (window, "closed",
2658                           G_CALLBACK (annotation_window_closed),
2659                           view);
2660         g_signal_connect (window, "moved",
2661                           G_CALLBACK (annotation_window_moved),
2662                           view);
2663         g_signal_connect_swapped (annot, "notify::contents",
2664                                   G_CALLBACK (ev_view_annotation_save_contents),
2665                                   view);
2666         g_object_set_data (G_OBJECT (annot), "popup", window);
2667
2668         page = ev_annotation_get_page_index (annot);
2669         ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window), &doc_rect);
2670         doc_rect_to_view_rect (view, page, &doc_rect, &view_rect);
2671         view_rect.x -= view->scroll_x;
2672         view_rect.y -= view->scroll_y;
2673
2674         ev_view_window_child_put (view, window, page,
2675                                   view_rect.x, view_rect.y,
2676                                   doc_rect.x1, doc_rect.y1);
2677
2678         return window;
2679 }
2680
2681 static void
2682 show_annotation_windows (EvView *view,
2683                          gint    page)
2684 {
2685         EvMappingList *annots;
2686         GList         *l;
2687         GtkWindow     *parent;
2688
2689         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2690
2691         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2692
2693         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2694                 EvAnnotation      *annot;
2695                 EvViewWindowChild *child;
2696                 GtkWidget         *window;
2697
2698                 annot = ((EvMapping *)(l->data))->data;
2699
2700                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2701                         continue;
2702
2703                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2704                         continue;
2705
2706                 window = g_object_get_data (G_OBJECT (annot), "popup");
2707                 if (window) {
2708                         ev_view_window_child_move_with_parent (view, window);
2709                         continue;
2710                 }
2711
2712                 /* Look if we already have a popup for this annot */
2713                 child = ev_view_find_window_child_for_annot (view, page, annot);
2714                 window = child ? child->window : NULL;
2715                 if (window) {
2716                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2717                         g_object_set_data (G_OBJECT (annot), "popup", window);
2718                         ev_view_window_child_move_with_parent (view, window);
2719                 } else {
2720                         ev_view_create_annotation_window (view, annot, parent);
2721                 }
2722         }
2723 }
2724
2725 static void
2726 hide_annotation_windows (EvView *view,
2727                          gint    page)
2728 {
2729         EvMappingList *annots;
2730         GList         *l;
2731
2732         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2733
2734         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2735                 EvAnnotation *annot;
2736                 GtkWidget    *window;
2737
2738                 annot = ((EvMapping *)(l->data))->data;
2739
2740                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2741                         continue;
2742
2743                 window = g_object_get_data (G_OBJECT (annot), "popup");
2744                 if (window)
2745                         gtk_widget_hide (window);
2746         }
2747 }
2748
2749 static EvAnnotation *
2750 ev_view_get_annotation_at_location (EvView  *view,
2751                                     gdouble  x,
2752                                     gdouble  y)
2753 {
2754         gint page = -1;
2755         gint x_new = 0, y_new = 0;
2756         EvMappingList *annotations_mapping;
2757
2758         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2759                 return NULL;
2760
2761         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2762                 return NULL;
2763
2764         annotations_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
2765
2766         if (annotations_mapping)
2767                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2768         else
2769                 return NULL;
2770 }
2771
2772 static void
2773 ev_view_annotation_show_popup_window (EvView    *view,
2774                                       GtkWidget *window)
2775 {
2776         EvViewWindowChild *child;
2777
2778         if (!window)
2779                 return;
2780
2781         child = ev_view_get_window_child (view, window);
2782         if (!child->visible) {
2783                 child->visible = TRUE;
2784                 ev_view_window_child_move (view, child, child->x, child->y);
2785                 gtk_widget_show (window);
2786         }
2787 }
2788
2789 static void
2790 ev_view_handle_annotation (EvView       *view,
2791                            EvAnnotation *annot,
2792                            gdouble       x,
2793                            gdouble       y,
2794                            guint32       timestamp)
2795 {
2796         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2797                 GtkWidget *window;
2798
2799                 window = g_object_get_data (G_OBJECT (annot), "popup");
2800                 ev_view_annotation_show_popup_window (view, window);
2801         }
2802
2803         if (EV_IS_ANNOTATION_ATTACHMENT (annot)) {
2804                 EvAttachment *attachment;
2805
2806                 attachment = ev_annotation_attachment_get_attachment (EV_ANNOTATION_ATTACHMENT (annot));
2807                 if (attachment) {
2808                         GError *error = NULL;
2809
2810                         ev_attachment_open (attachment,
2811                                             gtk_widget_get_screen (GTK_WIDGET (view)),
2812                                             timestamp,
2813                                             &error);
2814
2815                         if (error) {
2816                                 g_warning ("%s", error->message);
2817                                 g_error_free (error);
2818                         }
2819                 }
2820         }
2821 }
2822
2823 static void
2824 ev_view_create_annotation (EvView          *view,
2825                            EvAnnotationType annot_type,
2826                            gint             x,
2827                            gint             y)
2828 {
2829         EvAnnotation   *annot;
2830         GdkPoint        point;
2831         GdkRectangle    page_area;
2832         GtkBorder       border;
2833         EvRectangle     doc_rect, popup_rect;
2834         EvPage         *page;
2835         GdkColor        color = { 0, 65535, 65535, 0 };
2836         GdkRectangle    view_rect;
2837         cairo_region_t *region;
2838
2839         point.x = x;
2840         point.y = y;
2841         ev_view_get_page_extents (view, view->current_page, &page_area, &border);
2842         view_point_to_doc_point (view, &point, &page_area,
2843                                  &doc_rect.x1, &doc_rect.y1);
2844         doc_rect.x2 = doc_rect.x1 + 24;
2845         doc_rect.y2 = doc_rect.y1 + 24;
2846
2847         ev_document_doc_mutex_lock ();
2848         page = ev_document_get_page (view->document, view->current_page);
2849         switch (annot_type) {
2850         case EV_ANNOTATION_TYPE_TEXT:
2851                 annot = ev_annotation_text_new (page);
2852                 break;
2853         case EV_ANNOTATION_TYPE_ATTACHMENT:
2854                 /* TODO */
2855                 g_object_unref (page);
2856                 ev_document_doc_mutex_unlock ();
2857                 return;
2858         default:
2859                 g_assert_not_reached ();
2860         }
2861         g_object_unref (page);
2862
2863         ev_annotation_set_color (annot, &color);
2864
2865         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2866                 popup_rect.x1 = doc_rect.x2;
2867                 popup_rect.x2 = popup_rect.x1 + 200;
2868                 popup_rect.y1 = doc_rect.y2;
2869                 popup_rect.y2 = popup_rect.y1 + 150;
2870                 g_object_set (annot,
2871                               "rectangle", &popup_rect,
2872                               "has_popup", TRUE,
2873                               "popup_is_open", FALSE,
2874                               "label", g_get_real_name (),
2875                               "opacity", 1.0,
2876                               NULL);
2877         }
2878         ev_document_annotations_add_annotation (EV_DOCUMENT_ANNOTATIONS (view->document),
2879                                                 annot, &doc_rect);
2880         ev_document_doc_mutex_unlock ();
2881
2882         /* If the page didn't have annots, mark the cache as dirty */
2883         if (!ev_page_cache_get_annot_mapping (view->page_cache, view->current_page))
2884                 ev_page_cache_mark_dirty (view->page_cache, view->current_page);
2885
2886         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2887                 GtkWindow *parent;
2888                 GtkWidget *window;
2889
2890                 parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2891                 window = ev_view_create_annotation_window (view, annot, parent);
2892
2893                 /* Show the annot window the first time */
2894                 ev_view_annotation_show_popup_window (view, window);
2895         }
2896
2897         doc_rect_to_view_rect (view, view->current_page, &doc_rect, &view_rect);
2898         view_rect.x -= view->scroll_x;
2899         view_rect.y -= view->scroll_y;
2900         region = cairo_region_create_rectangle (&view_rect);
2901         ev_view_reload_page (view, view->current_page, region);
2902         cairo_region_destroy (region);
2903
2904         g_signal_emit (view, signals[SIGNAL_ANNOT_ADDED], 0, annot);
2905 }
2906
2907 void
2908 ev_view_focus_annotation (EvView    *view,
2909                           EvMapping *annot_mapping)
2910 {
2911         GdkRectangle  view_rect;
2912         EvAnnotation *annot;
2913         guint         page;
2914
2915         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2916                 return;
2917
2918         if (view->focus_annotation == annot_mapping)
2919                 return;
2920
2921         view->focus_annotation = annot_mapping;
2922         annot = (EvAnnotation *)annot_mapping->data;
2923
2924         page = ev_annotation_get_page_index (annot);
2925         ev_document_model_set_page (view->model, page);
2926
2927         doc_rect_to_view_rect (view, page,
2928                                &annot_mapping->area, &view_rect);
2929         ensure_rectangle_is_visible (view, &view_rect);
2930         gtk_widget_queue_draw (GTK_WIDGET (view));
2931 }
2932
2933 void
2934 ev_view_begin_add_annotation (EvView          *view,
2935                               EvAnnotationType annot_type)
2936 {
2937         if (annot_type == EV_ANNOTATION_TYPE_UNKNOWN)
2938                 return;
2939
2940         if (view->adding_annot)
2941                 return;
2942
2943         view->adding_annot = TRUE;
2944         view->adding_annot_type = annot_type;
2945         ev_view_set_cursor (view, EV_VIEW_CURSOR_ADD);
2946 }
2947
2948 void
2949 ev_view_cancel_add_annotation (EvView *view)
2950 {
2951         gint x, y;
2952
2953         if (!view->adding_annot)
2954                 return;
2955
2956         view->adding_annot = FALSE;
2957         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
2958         ev_view_handle_cursor_over_xy (view, x, y);
2959 }
2960
2961 static gboolean
2962 ev_view_synctex_backward_search (EvView *view,
2963                                  gdouble x,
2964                                  gdouble y)
2965 {
2966         gint page = -1;
2967         gint x_new = 0, y_new = 0;
2968         EvSourceLink *link;
2969
2970         if (!ev_document_has_synctex (view->document))
2971                 return FALSE;
2972
2973         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2974                 return FALSE;
2975
2976         link = ev_document_synctex_backward_search (view->document, page, x_new, y_new);
2977         if (link) {
2978                 g_signal_emit (view, signals[SIGNAL_SYNC_SOURCE], 0, link);
2979                 g_free (link);
2980
2981                 return TRUE;
2982         }
2983
2984         return FALSE;
2985 }
2986
2987 /*** GtkWidget implementation ***/
2988
2989 static void
2990 ev_view_size_request_continuous_dual_page (EvView         *view,
2991                                            GtkRequisition *requisition)
2992 {
2993         gint n_pages;
2994
2995         n_pages = ev_document_get_n_pages (view->document) + 1;
2996         get_page_y_offset (view, n_pages, &requisition->height);
2997
2998         switch (view->sizing_mode) {
2999                 case EV_SIZING_FIT_WIDTH:
3000                 case EV_SIZING_BEST_FIT:
3001                         requisition->width = 1;
3002
3003                         break;
3004                 case EV_SIZING_FREE: {
3005                         gint max_width;
3006                         GtkBorder border;
3007
3008                         ev_view_get_max_page_size (view, &max_width, NULL);
3009                         compute_border (view, max_width, max_width, &border);
3010                         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
3011                 }
3012                         break;
3013                 default:
3014                         g_assert_not_reached ();
3015         }
3016 }
3017
3018 static void
3019 ev_view_size_request_continuous (EvView         *view,
3020                                  GtkRequisition *requisition)
3021 {
3022         gint n_pages;
3023
3024         n_pages = ev_document_get_n_pages (view->document);
3025         get_page_y_offset (view, n_pages, &requisition->height);
3026
3027         switch (view->sizing_mode) {
3028                 case EV_SIZING_FIT_WIDTH:
3029                 case EV_SIZING_BEST_FIT:
3030                         requisition->width = 1;
3031
3032                         break;
3033                 case EV_SIZING_FREE: {
3034                         gint max_width;
3035                         GtkBorder border;
3036
3037                         ev_view_get_max_page_size (view, &max_width, NULL);
3038                         compute_border (view, max_width, max_width, &border);
3039                         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
3040                 }
3041                         break;
3042                 default:
3043                         g_assert_not_reached ();
3044         }
3045 }
3046
3047 static void
3048 ev_view_size_request_dual_page (EvView         *view,
3049                                 GtkRequisition *requisition)
3050 {
3051         GtkBorder border;
3052         gint width, height;
3053
3054         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
3055                 requisition->width = 1;
3056                 requisition->height = 1;
3057
3058                 return;
3059         }
3060
3061         /* Find the largest of the two. */
3062         ev_view_get_page_size (view,
3063                                view->current_page,
3064                                &width, &height);
3065         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
3066                 gint width_2, height_2;
3067                 ev_view_get_page_size (view,
3068                                        view->current_page + 1,
3069                                        &width_2, &height_2);
3070                 if (width_2 > width) {
3071                         width = width_2;
3072                         height = height_2;
3073                 }
3074         }
3075         compute_border (view, width, height, &border);
3076
3077         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
3078                 ((width + border.left + border.right) * 2) + (view->spacing * 3);
3079         requisition->height = (height + border.top + border.bottom) + (view->spacing * 2);
3080 }
3081
3082 static void
3083 ev_view_size_request_single_page (EvView         *view,
3084                                   GtkRequisition *requisition)
3085 {
3086         GtkBorder border;
3087         gint width, height;
3088
3089         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
3090                 requisition->width = 1;
3091                 requisition->height = 1;
3092
3093                 return;
3094         }
3095
3096         ev_view_get_page_size (view, view->current_page, &width, &height);
3097         compute_border (view, width, height, &border);
3098
3099         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
3100                 width + border.left + border.right + (2 * view->spacing);
3101         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
3102 }
3103
3104 static void
3105 ev_view_size_request (GtkWidget      *widget,
3106                       GtkRequisition *requisition)
3107 {
3108         EvView *view = EV_VIEW (widget);
3109
3110         if (view->document == NULL) {
3111                 view->requisition.width = 1;
3112                 view->requisition.height = 1;
3113
3114                 *requisition = view->requisition;
3115
3116                 return;
3117         }
3118
3119         /* Get zoom for size here when not called from
3120          * ev_view_size_allocate()
3121          */
3122         if (!view->internal_size_request &&
3123             (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3124              view->sizing_mode == EV_SIZING_BEST_FIT)) {
3125                 GtkAllocation allocation;
3126
3127                 gtk_widget_get_allocation (widget, &allocation);
3128                 ev_view_zoom_for_size (view,
3129                                        allocation.width,
3130                                        allocation.height);
3131         }
3132
3133         if (view->continuous && view->dual_page)
3134                 ev_view_size_request_continuous_dual_page (view, &view->requisition);
3135         else if (view->continuous)
3136                 ev_view_size_request_continuous (view, &view->requisition);
3137         else if (view->dual_page)
3138                 ev_view_size_request_dual_page (view, &view->requisition);
3139         else
3140                 ev_view_size_request_single_page (view, &view->requisition);
3141
3142         *requisition = view->requisition;
3143 }
3144
3145 static void
3146 ev_view_size_allocate (GtkWidget      *widget,
3147                        GtkAllocation  *allocation)
3148 {
3149         EvView *view = EV_VIEW (widget);
3150         GList  *children, *l;
3151         gint    root_x, root_y;
3152
3153         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
3154
3155         if (!view->document)
3156                 return;
3157
3158         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3159             view->sizing_mode == EV_SIZING_BEST_FIT) {
3160                 GtkRequisition req;
3161
3162                 ev_view_zoom_for_size (view,
3163                                        allocation->width,
3164                                        allocation->height);
3165                 view->internal_size_request = TRUE;
3166                 ev_view_size_request (widget, &req);
3167                 view->internal_size_request = FALSE;
3168         }
3169
3170         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
3171         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
3172
3173         if (view->document)
3174                 view_update_range_and_current_page (view);
3175
3176         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
3177         view->pending_resize = FALSE;
3178         view->pending_point.x = 0;
3179         view->pending_point.y = 0;
3180
3181         children = gtk_container_get_children (GTK_CONTAINER (widget));
3182         for (l = children; l && l->data; l = g_list_next (l)) {
3183                 EvFormField   *field;
3184                 GdkRectangle   view_area;
3185                 EvMappingList *form_field_mapping;
3186                 GtkAllocation  child_allocation;
3187                 GtkRequisition child_requisition;
3188                 GtkWidget     *child = (GtkWidget *)l->data;
3189
3190                 field = g_object_get_data (G_OBJECT (child), "form-field");
3191                 if (!field)
3192                         continue;
3193
3194                 form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
3195                                                                            field->page->index);
3196                 ev_view_get_area_from_mapping (view, field->page->index,
3197                                                form_field_mapping,
3198                                                field, &view_area);
3199
3200                 gtk_widget_size_request (child, &child_requisition);
3201                 if (child_requisition.width != view_area.width ||
3202                     child_requisition.height != view_area.height)
3203                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
3204
3205                 gtk_container_child_get (GTK_CONTAINER (widget),
3206                                          child,
3207                                          "x", &child_allocation.x,
3208                                          "y", &child_allocation.y,
3209                                          NULL);
3210                 if (child_allocation.x != view_area.x ||
3211                     child_allocation.y != view_area.y) {
3212                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
3213                 }
3214         }
3215         g_list_free (children);
3216
3217         if (view->window_children)
3218                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
3219                                        &root_x, &root_y);
3220
3221         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
3222                 EvViewWindowChild *child;
3223                 EvRectangle        doc_rect;
3224                 GdkRectangle       view_rect;
3225
3226                 child = (EvViewWindowChild *)l->data;
3227
3228                 ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window), &doc_rect);
3229                 if (child->moved) {
3230                         doc_rect.x1 = child->orig_x;
3231                         doc_rect.y1 = child->orig_y;
3232                 }
3233                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
3234                 view_rect.x -= view->scroll_x;
3235                 view_rect.y -= view->scroll_y;
3236
3237                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
3238                         child->parent_x = root_x;
3239                         child->parent_y = root_y;
3240                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
3241                 }
3242         }
3243 }
3244
3245 static void
3246 ev_view_realize (GtkWidget *widget)
3247 {
3248         EvView    *view = EV_VIEW (widget);
3249         GdkWindow *bin_window;
3250         GtkStyle  *style;
3251
3252         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
3253                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
3254
3255         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3256         gdk_window_set_events (bin_window,
3257                                (gdk_window_get_events (bin_window) |
3258                                 GDK_EXPOSURE_MASK |
3259                                 GDK_BUTTON_PRESS_MASK |
3260                                 GDK_BUTTON_RELEASE_MASK |
3261                                 GDK_SCROLL_MASK |
3262                                 GDK_KEY_PRESS_MASK |
3263                                 GDK_POINTER_MOTION_MASK |
3264                                 GDK_POINTER_MOTION_HINT_MASK |
3265                                 GDK_ENTER_NOTIFY_MASK |
3266                                 GDK_LEAVE_NOTIFY_MASK));
3267
3268         style = gtk_widget_get_style (widget);
3269         gdk_window_set_background (bin_window, &style->mid[GTK_STATE_NORMAL]);
3270
3271         on_adjustment_value_changed (NULL, view);
3272 }
3273
3274 static gboolean
3275 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
3276 {
3277         EvView *view = EV_VIEW (widget);
3278         guint state;
3279
3280         state = event->state & gtk_accelerator_get_default_mod_mask ();
3281
3282         if (state == GDK_CONTROL_MASK) {
3283                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
3284                 if (event->direction == GDK_SCROLL_UP ||
3285                     event->direction == GDK_SCROLL_LEFT) {
3286                         if (ev_view_can_zoom_in (view)) {
3287                                 ev_view_zoom_in (view);
3288                         }
3289                 } else {
3290                         if (ev_view_can_zoom_out (view)) {
3291                                 ev_view_zoom_out (view);
3292                         }
3293                 }
3294
3295                 return TRUE;
3296         }
3297
3298         view->jump_to_find_result = FALSE;
3299
3300         /* Shift+Wheel scrolls the in the perpendicular direction */
3301         if (state & GDK_SHIFT_MASK) {
3302                 if (event->direction == GDK_SCROLL_UP)
3303                         event->direction = GDK_SCROLL_LEFT;
3304                 else if (event->direction == GDK_SCROLL_LEFT)
3305                         event->direction = GDK_SCROLL_UP;
3306                 else if (event->direction == GDK_SCROLL_DOWN)
3307                         event->direction = GDK_SCROLL_RIGHT;
3308                 else if (event->direction == GDK_SCROLL_RIGHT)
3309                         event->direction = GDK_SCROLL_DOWN;
3310
3311                 event->state &= ~GDK_SHIFT_MASK;
3312                 state &= ~GDK_SHIFT_MASK;
3313         }
3314
3315         if (state == 0 && view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous) {
3316                 switch (event->direction) {
3317                         case GDK_SCROLL_DOWN:
3318                         case GDK_SCROLL_RIGHT:
3319                                 ev_view_next_page (view);
3320                                 break;
3321                         case GDK_SCROLL_UP:
3322                         case GDK_SCROLL_LEFT:
3323                                 ev_view_previous_page (view);
3324                                 break;
3325                 }
3326
3327                 return TRUE;
3328         }
3329
3330         return FALSE;
3331 }
3332
3333 static EvViewSelection *
3334 find_selection_for_page (EvView *view,
3335                          gint    page)
3336 {
3337         GList *list;
3338
3339         for (list = view->selection_info.selections; list != NULL; list = list->next) {
3340                 EvViewSelection *selection;
3341
3342                 selection = (EvViewSelection *) list->data;
3343
3344                 if (selection->page == page)
3345                         return selection;
3346         }
3347
3348         return NULL;
3349 }
3350
3351 #if GTK_CHECK_VERSION (2, 90, 8)
3352 static gboolean
3353 ev_view_draw (GtkWidget *widget,
3354               cairo_t   *cr)
3355 #else
3356 static gboolean
3357 ev_view_expose_event (GtkWidget      *widget,
3358                       GdkEventExpose *event)
3359 #endif
3360 {
3361         EvView    *view = EV_VIEW (widget);
3362         gint       i;
3363 #if GTK_CHECK_VERSION (2, 90, 8)
3364         cairo_rectangle_int_t clip_rect;
3365         GdkRectangle *area = &clip_rect;
3366 #else
3367         GdkWindow *bin_window;
3368         cairo_t   *cr;
3369         GdkRectangle *area = &event->area;
3370 #endif
3371
3372         if (view->loading) {
3373                 show_loading_window (view);
3374         } else if (view->loading_window &&
3375                    gtk_widget_get_visible (view->loading_window)) {
3376                 ev_view_loading_window_move (view);
3377         }
3378
3379         if (view->document == NULL)
3380                 return FALSE;
3381
3382 #if GTK_CHECK_VERSION (2, 90, 8)
3383         if (!gdk_cairo_get_clip_rectangle (cr, &clip_rect))
3384                 return FALSE;
3385 #else
3386         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3387         cr = gdk_cairo_create (bin_window);
3388 #endif
3389
3390         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3391                 GdkRectangle page_area;
3392                 GtkBorder border;
3393                 gboolean page_ready = TRUE;
3394
3395                 if (!ev_view_get_page_extents (view, i, &page_area, &border))
3396                         continue;
3397
3398                 page_area.x -= view->scroll_x;
3399                 page_area.y -= view->scroll_y;
3400
3401                 draw_one_page (view, i, cr, &page_area, &border, area, &page_ready);
3402
3403                 if (page_ready && view->find_pages && view->highlight_find_results)
3404                         highlight_find_results (view, cr, i);
3405                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3406                         show_annotation_windows (view, i);
3407                 if (page_ready && view->focus_annotation)
3408 #if GTK_CHECK_VERSION (2, 90, 8)
3409                         focus_annotation (view, cr, i, &clip_rect);
3410 #else
3411                         focus_annotation (view, cr, i, &event->area);
3412 #endif
3413                 if (page_ready && view->synctex_result)
3414                         highlight_forward_search_results (view, cr, i);
3415         }
3416
3417 #if GTK_CHECK_VERSION (2, 90, 8)
3418         if (GTK_WIDGET_CLASS (ev_view_parent_class)->draw)
3419                 GTK_WIDGET_CLASS (ev_view_parent_class)->draw (widget, cr);
3420 #else
3421         cairo_destroy (cr);
3422
3423         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3424                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3425 #endif
3426
3427         return FALSE;
3428 }
3429
3430 static gboolean
3431 ev_view_do_popup_menu (EvView *view,
3432                        gdouble x,
3433                        gdouble y)
3434 {
3435         GList        *items = NULL;
3436         EvLink       *link;
3437         EvImage      *image;
3438         EvAnnotation *annot;
3439
3440         image = ev_view_get_image_at_location (view, x, y);
3441         if (image)
3442                 items = g_list_prepend (items, image);
3443
3444         link = ev_view_get_link_at_location (view, x, y);
3445         if (link)
3446                 items = g_list_prepend (items, link);
3447
3448         annot = ev_view_get_annotation_at_location (view, x, y);
3449         if (annot)
3450                 items = g_list_prepend (items, annot);
3451
3452         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, items);
3453
3454         g_list_free (items);
3455
3456         return TRUE;
3457 }
3458
3459 static gboolean
3460 ev_view_popup_menu (GtkWidget *widget)
3461 {
3462         gint x, y;
3463
3464         gtk_widget_get_pointer (widget, &x, &y);
3465         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3466 }
3467
3468 static void
3469 get_link_area (EvView       *view,
3470                gint          x,
3471                gint          y,
3472                EvLink       *link,
3473                GdkRectangle *area)
3474 {
3475         EvMappingList *link_mapping;
3476         gint           page;
3477         gint           x_offset = 0, y_offset = 0;
3478
3479         x += view->scroll_x;
3480         y += view->scroll_y;
3481
3482         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3483
3484         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
3485         ev_view_get_area_from_mapping (view, page,
3486                                        link_mapping,
3487                                        link, area);
3488 }
3489
3490 static void
3491 get_annot_area (EvView       *view,
3492                gint          x,
3493                gint          y,
3494                EvAnnotation *annot,
3495                GdkRectangle *area)
3496 {
3497         EvMappingList *annot_mapping;
3498         gint           page;
3499         gint           x_offset = 0, y_offset = 0;
3500
3501         x += view->scroll_x;
3502         y += view->scroll_y;
3503
3504         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3505
3506         annot_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
3507         ev_view_get_area_from_mapping (view, page,
3508                                        annot_mapping,
3509                                        annot, area);
3510 }
3511
3512 static gboolean
3513 ev_view_query_tooltip (GtkWidget  *widget,
3514                        gint        x,
3515                        gint        y,
3516                        gboolean    keyboard_tip,
3517                        GtkTooltip *tooltip)
3518 {
3519         EvView       *view = EV_VIEW (widget);
3520         EvLink       *link;
3521         EvAnnotation *annot;
3522         gchar        *text;
3523
3524         annot = ev_view_get_annotation_at_location (view, x, y);
3525         if (annot) {
3526                 const gchar *contents;
3527
3528                 if ((contents = ev_annotation_get_contents (annot))) {
3529                         GdkRectangle annot_area;
3530
3531                         get_annot_area (view, x, y, annot, &annot_area);
3532                         gtk_tooltip_set_text (tooltip, contents);
3533                         gtk_tooltip_set_tip_area (tooltip, &annot_area);
3534
3535                         return TRUE;
3536                 }
3537         }
3538
3539         link = ev_view_get_link_at_location (view, x, y);
3540         if (!link)
3541                 return FALSE;
3542
3543         text = tip_from_link (view, link);
3544         if (text && g_utf8_validate (text, -1, NULL)) {
3545                 GdkRectangle link_area;
3546
3547                 get_link_area (view, x, y, link, &link_area);
3548                 gtk_tooltip_set_text (tooltip, text);
3549                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3550                 g_free (text);
3551
3552                 return TRUE;
3553         }
3554         g_free (text);
3555
3556         return FALSE;
3557 }
3558
3559 static void
3560 start_selection_for_event (EvView         *view,
3561                            GdkEventButton *event)
3562 {
3563         clear_selection (view);
3564
3565         view->selection_info.start.x = event->x + view->scroll_x;
3566         view->selection_info.start.y = event->y + view->scroll_y;
3567
3568         switch (event->type) {
3569                 case GDK_2BUTTON_PRESS:
3570                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3571                         break;
3572                 case GDK_3BUTTON_PRESS:
3573                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3574                         break;
3575                 default:
3576                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3577                         return;
3578         }
3579
3580         /* In case of WORD or LINE, compute selections now */
3581         compute_selections (view,
3582                             view->selection_info.style,
3583                             &(view->selection_info.start),
3584                             &(view->selection_info.start));
3585 }
3586
3587 static gboolean
3588 ev_view_button_press_event (GtkWidget      *widget,
3589                             GdkEventButton *event)
3590 {
3591         EvView *view = EV_VIEW (widget);
3592
3593         if (!view->document)
3594                 return FALSE;
3595
3596         if (!gtk_widget_has_focus (widget)) {
3597                 gtk_widget_grab_focus (widget);
3598         }
3599
3600         if (view->window_child_focus) {
3601                 EvAnnotationWindow *window;
3602                 EvAnnotation       *annot;
3603
3604                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3605                 annot = ev_annotation_window_get_annotation (window);
3606                 ev_annotation_window_ungrab_focus (window);
3607                 view->window_child_focus = NULL;
3608         }
3609
3610         view->pressed_button = event->button;
3611         view->selection_info.in_drag = FALSE;
3612
3613         if (view->adding_annot)
3614                 return FALSE;
3615
3616         if (view->scroll_info.autoscrolling)
3617                 return TRUE;
3618
3619         switch (event->button) {
3620                 case 1: {
3621                         EvImage *image;
3622                         EvAnnotation *annot;
3623                         EvFormField *field;
3624
3625                         if (event->state & GDK_CONTROL_MASK)
3626                                 return ev_view_synctex_backward_search (view, event->x , event->y);
3627
3628                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3629                                 if (event->type == GDK_3BUTTON_PRESS) {
3630                                         start_selection_for_event (view, event);
3631                                 } else if (location_in_selected_text (view,
3632                                                                event->x + view->scroll_x,
3633                                                                event->y + view->scroll_y)) {
3634                                         view->selection_info.in_drag = TRUE;
3635                                 } else {
3636                                         start_selection_for_event (view, event);
3637                                 }
3638
3639                                 gtk_widget_queue_draw (widget);
3640                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3641                                 ev_view_handle_annotation (view, annot, event->x, event->y, event->time);
3642                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3643                                 ev_view_remove_all (view);
3644                                 ev_view_handle_form_field (view, field, event->x, event->y);
3645                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3646                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3647                                 if (view->image_dnd_info.image)
3648                                         g_object_unref (view->image_dnd_info.image);
3649                                 view->image_dnd_info.image = g_object_ref (image);
3650                                 view->image_dnd_info.in_drag = TRUE;
3651
3652                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3653                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3654                         } else {
3655                                 ev_view_remove_all (view);
3656
3657                                 if (view->synctex_result) {
3658                                         g_free (view->synctex_result);
3659                                         view->synctex_result = NULL;
3660                                         gtk_widget_queue_draw (widget);
3661                                 }
3662
3663                                 if (view->focus_annotation)
3664                                         view->focus_annotation = NULL;
3665
3666                                 if (EV_IS_SELECTION (view->document))
3667                                         start_selection_for_event (view, event);
3668                         }
3669                 }
3670                         return TRUE;
3671                 case 2:
3672                         /* use root coordinates as reference point because
3673                          * scrolling changes window relative coordinates */
3674                         view->drag_info.start.x = event->x_root;
3675                         view->drag_info.start.y = event->y_root;
3676                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3677                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3678
3679                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3680
3681                         return TRUE;
3682                 case 3:
3683                         view->scroll_info.start_y = event->y;
3684                         return ev_view_do_popup_menu (view, event->x, event->y);
3685         }
3686
3687         return FALSE;
3688 }
3689
3690 static void
3691 ev_view_remove_all (EvView *view)
3692 {
3693         GList *children, *child;
3694
3695         children = gtk_container_get_children (GTK_CONTAINER (view));
3696         for (child = children; child && child->data; child = g_list_next (child)) {
3697                 gtk_container_remove (GTK_CONTAINER (view),
3698                                       GTK_WIDGET (child->data));
3699         }
3700         g_list_free (children);
3701 }
3702
3703 /*** Drag and Drop ***/
3704 static void
3705 ev_view_drag_data_get (GtkWidget        *widget,
3706                        GdkDragContext   *context,
3707                        GtkSelectionData *selection_data,
3708                        guint             info,
3709                        guint             time)
3710 {
3711         EvView *view = EV_VIEW (widget);
3712
3713         switch (info) {
3714                 case TARGET_DND_TEXT:
3715                         if (EV_IS_SELECTION (view->document) &&
3716                             view->selection_info.selections) {
3717                                 gchar *text;
3718
3719                                 text = get_selected_text (view);
3720                                 gtk_selection_data_set_text (selection_data,
3721                                                              text,
3722                                                              strlen (text));
3723                                 g_free (text);
3724                         }
3725                         break;
3726                 case TARGET_DND_IMAGE:
3727                         if (view->image_dnd_info.image) {
3728                                 GdkPixbuf *pixbuf;
3729
3730                                 ev_document_doc_mutex_lock ();
3731                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3732                                                                        view->image_dnd_info.image);
3733                                 ev_document_doc_mutex_unlock ();
3734
3735                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3736                                 g_object_unref (pixbuf);
3737                         }
3738                         break;
3739                 case TARGET_DND_URI:
3740                         if (view->image_dnd_info.image) {
3741                                 GdkPixbuf   *pixbuf;
3742                                 const gchar *tmp_uri;
3743                                 gchar       *uris[2];
3744
3745                                 ev_document_doc_mutex_lock ();
3746                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3747                                                                        view->image_dnd_info.image);
3748                                 ev_document_doc_mutex_unlock ();
3749
3750                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3751                                 g_object_unref (pixbuf);
3752
3753                                 uris[0] = (gchar *)tmp_uri;
3754                                 uris[1] = NULL;
3755                                 gtk_selection_data_set_uris (selection_data, uris);
3756                         }
3757         }
3758 }
3759
3760 static gboolean
3761 ev_view_drag_motion (GtkWidget      *widget,
3762                      GdkDragContext *context,
3763                      gint            x,
3764                      gint            y,
3765                      guint           time)
3766 {
3767         if (gtk_drag_get_source_widget (context) == widget)
3768                 gdk_drag_status (context, 0, time);
3769         else
3770                 gdk_drag_status (context, gdk_drag_context_get_suggested_action (context), time);
3771
3772         return TRUE;
3773 }
3774
3775 static gboolean
3776 selection_update_idle_cb (EvView *view)
3777 {
3778         compute_selections (view,
3779                             view->selection_info.style,
3780                             &view->selection_info.start,
3781                             &view->motion);
3782         view->selection_update_id = 0;
3783         return FALSE;
3784 }
3785
3786 static gboolean
3787 selection_scroll_timeout_cb (EvView *view)
3788 {
3789         gint x, y, shift = 0;
3790         GtkWidget *widget = GTK_WIDGET (view);
3791         GtkAllocation allocation;
3792
3793         gtk_widget_get_allocation (widget, &allocation);
3794         gtk_widget_get_pointer (widget, &x, &y);
3795
3796         if (y > allocation.height) {
3797                 shift = (y - allocation.height) / 2;
3798         } else if (y < 0) {
3799                 shift = y / 2;
3800         }
3801
3802         if (shift)
3803                 gtk_adjustment_set_value (view->vadjustment,
3804                                           CLAMP (gtk_adjustment_get_value (view->vadjustment) + shift,
3805                                                  gtk_adjustment_get_lower (view->vadjustment),
3806                                                  gtk_adjustment_get_upper (view->vadjustment) -
3807                                                  gtk_adjustment_get_page_size (view->vadjustment)));
3808
3809         if (x > allocation.width) {
3810                 shift = (x - allocation.width) / 2;
3811         } else if (x < 0) {
3812                 shift = x / 2;
3813         }
3814
3815         if (shift)
3816                 gtk_adjustment_set_value (view->hadjustment,
3817                                           CLAMP (gtk_adjustment_get_value (view->hadjustment) + shift,
3818                                                  gtk_adjustment_get_lower (view->hadjustment),
3819                                                  gtk_adjustment_get_upper (view->hadjustment) -
3820                                                  gtk_adjustment_get_page_size (view->hadjustment)));
3821
3822         return TRUE;
3823 }
3824
3825 static gboolean
3826 ev_view_drag_update_momentum (EvView *view)
3827 {
3828         int i;
3829         if (!view->drag_info.in_drag)
3830                 return FALSE;
3831
3832         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3833                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3834                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3835         }
3836
3837         /* Momentum is a moving average of 10ms granularity over
3838          * the last 100ms with each 10ms stored in buffer.
3839          */
3840
3841         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3842         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3843
3844         return TRUE;
3845 }
3846
3847 static gboolean
3848 ev_view_scroll_drag_release (EvView *view)
3849 {
3850         gdouble dhadj_value, dvadj_value;
3851         gdouble oldhadjustment, oldvadjustment;
3852         gdouble h_page_size, v_page_size;
3853         gdouble h_upper, v_upper;
3854         GtkAllocation allocation;
3855
3856         view->drag_info.momentum.x /= 1.2;
3857         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3858
3859         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
3860
3861         h_page_size = gtk_adjustment_get_page_size (view->hadjustment);
3862         v_page_size = gtk_adjustment_get_page_size (view->vadjustment);
3863
3864         dhadj_value = h_page_size *
3865                       (gdouble)view->drag_info.momentum.x / allocation.width;
3866         dvadj_value = v_page_size *
3867                       (gdouble)view->drag_info.momentum.y / allocation.height;
3868
3869         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3870         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3871
3872         h_upper = gtk_adjustment_get_upper (view->hadjustment);
3873         v_upper = gtk_adjustment_get_upper (view->vadjustment);
3874
3875         /* When we reach the edges, we need either to absorb some momentum and bounce by
3876          * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3877         if (((oldhadjustment + dhadj_value) > (h_upper - h_page_size)) ||
3878             ((oldhadjustment + dhadj_value) < 0))
3879                 view->drag_info.momentum.x = 0;
3880         if (((oldvadjustment + dvadj_value) > (v_upper - v_page_size)) ||
3881             ((oldvadjustment + dvadj_value) < 0))
3882                 view->drag_info.momentum.y = 0;
3883
3884         gtk_adjustment_set_value (view->hadjustment,
3885                                   MIN (oldhadjustment + dhadj_value,
3886                                        h_upper - h_page_size));
3887         gtk_adjustment_set_value (view->vadjustment,
3888                                   MIN (oldvadjustment + dvadj_value,
3889                                        v_upper - v_page_size));
3890
3891         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3892             ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3893                 return FALSE;
3894         else
3895                 return TRUE;
3896 }
3897
3898 static gboolean
3899 ev_view_motion_notify_event (GtkWidget      *widget,
3900                              GdkEventMotion *event)
3901 {
3902         EvView    *view = EV_VIEW (widget);
3903         GdkWindow *bin_window;
3904         gint       x, y;
3905
3906         if (!view->document)
3907                 return FALSE;
3908
3909         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3910
3911         if (event->is_hint || event->window != bin_window) {
3912             gtk_widget_get_pointer (widget, &x, &y);
3913         } else {
3914             x = event->x;
3915             y = event->y;
3916         }
3917
3918         if (view->scroll_info.autoscrolling) {
3919                 view->scroll_info.last_y = y;
3920                 return TRUE;
3921         }
3922
3923         if (view->selection_info.in_drag) {
3924                 if (gtk_drag_check_threshold (widget,
3925                                               view->selection_info.start.x,
3926                                               view->selection_info.start.y,
3927                                               x, y)) {
3928                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3929
3930                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3931
3932                         gtk_drag_begin (widget, target_list,
3933                                         GDK_ACTION_COPY,
3934                                         1, (GdkEvent *)event);
3935
3936                         view->selection_info.in_drag = FALSE;
3937
3938                         gtk_target_list_unref (target_list);
3939
3940                         return TRUE;
3941                 }
3942         } else if (view->image_dnd_info.in_drag) {
3943                 if (gtk_drag_check_threshold (widget,
3944                                               view->selection_info.start.x,
3945                                               view->selection_info.start.y,
3946                                               x, y)) {
3947                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3948
3949                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3950                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3951
3952                         gtk_drag_begin (widget, target_list,
3953                                         GDK_ACTION_COPY,
3954                                         1, (GdkEvent *)event);
3955
3956                         view->image_dnd_info.in_drag = FALSE;
3957
3958                         gtk_target_list_unref (target_list);
3959
3960                         return TRUE;
3961                 }
3962         }
3963
3964         switch (view->pressed_button) {
3965         case 1:
3966                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3967                  * documents only.
3968                  */
3969                 if (view->rotation != 0)
3970                         return FALSE;
3971
3972                 /* Schedule timeout to scroll during selection and additionally
3973                  * scroll once to allow arbitrary speed. */
3974                 if (!view->selection_scroll_id)
3975                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3976                                                                (GSourceFunc)selection_scroll_timeout_cb,
3977                                                                view);
3978                 else
3979                     selection_scroll_timeout_cb (view);
3980
3981                 view->selection_info.in_selection = TRUE;
3982                 view->motion.x = x + view->scroll_x;
3983                 view->motion.y = y + view->scroll_y;
3984
3985                 /* Queue an idle to handle the motion.  We do this because
3986                  * handling any selection events in the motion could be slower
3987                  * than new motion events reach us.  We always put it in the
3988                  * idle to make sure we catch up and don't visibly lag the
3989                  * mouse. */
3990                 if (!view->selection_update_id)
3991                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3992
3993                 return TRUE;
3994         case 2:
3995                 if (!view->drag_info.in_drag) {
3996                         gboolean start;
3997                         int i;
3998
3999                         start = gtk_drag_check_threshold (widget,
4000                                                           view->drag_info.start.x,
4001                                                           view->drag_info.start.y,
4002                                                           event->x_root,
4003                                                           event->y_root);
4004                         view->drag_info.in_drag = start;
4005                         view->drag_info.drag_timeout_id = g_timeout_add (10,
4006                                 (GSourceFunc)ev_view_drag_update_momentum, view);
4007                         /* Set 100 to choose how long it takes to build up momentum */
4008                         /* Clear out previous momentum info: */
4009                         for (i = 0; i < DRAG_HISTORY; i++) {
4010                                 view->drag_info.buffer[i].x = event->x;
4011                                 view->drag_info.buffer[i].y = event->y;
4012                         }
4013                         view->drag_info.momentum.x = 0;
4014                         view->drag_info.momentum.y = 0;
4015                 }
4016
4017                 if (view->drag_info.in_drag) {
4018                         int dx, dy;
4019                         gdouble dhadj_value, dvadj_value;
4020                         GtkAllocation allocation;
4021
4022                         view->drag_info.buffer[0].x = event->x;
4023                         view->drag_info.buffer[0].y = event->y;
4024
4025                         dx = event->x_root - view->drag_info.start.x;
4026                         dy = event->y_root - view->drag_info.start.y;
4027
4028                         gtk_widget_get_allocation (widget, &allocation);
4029
4030                         dhadj_value = gtk_adjustment_get_page_size (view->hadjustment) *
4031                                       (gdouble)dx / allocation.width;
4032                         dvadj_value = gtk_adjustment_get_page_size (view->vadjustment) *
4033                                       (gdouble)dy / allocation.height;
4034
4035                         /* clamp scrolling to visible area */
4036                         gtk_adjustment_set_value (view->hadjustment,
4037                                                   MIN (view->drag_info.hadj - dhadj_value,
4038                                                        gtk_adjustment_get_upper (view->hadjustment) -
4039                                                        gtk_adjustment_get_page_size (view->hadjustment)));
4040                         gtk_adjustment_set_value (view->vadjustment,
4041                                                   MIN (view->drag_info.vadj - dvadj_value,
4042                                                        gtk_adjustment_get_upper (view->vadjustment) -
4043                                                        gtk_adjustment_get_page_size (view->vadjustment)));
4044
4045                         return TRUE;
4046                 }
4047
4048                 break;
4049         default:
4050                 ev_view_handle_cursor_over_xy (view, x, y);
4051         }
4052
4053         return FALSE;
4054 }
4055
4056 static gboolean
4057 ev_view_button_release_event (GtkWidget      *widget,
4058                               GdkEventButton *event)
4059 {
4060         EvView *view = EV_VIEW (widget);
4061         EvLink *link = NULL;
4062
4063         view->image_dnd_info.in_drag = FALSE;
4064
4065         if (view->scroll_info.autoscrolling) {
4066                 ev_view_autoscroll_stop (view);
4067                 view->pressed_button = -1;
4068
4069                 return TRUE;
4070         }
4071
4072         if (view->pressed_button == 1 && event->state & GDK_CONTROL_MASK) {
4073                 view->pressed_button = -1;
4074                 return TRUE;
4075         }
4076
4077         if (view->drag_info.in_drag) {
4078                 view->drag_info.release_timeout_id =
4079                         g_timeout_add (20,
4080                                        (GSourceFunc)ev_view_scroll_drag_release, view);
4081         }
4082
4083         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
4084                 link = ev_view_get_link_at_location (view, event->x, event->y);
4085         }
4086
4087         view->drag_info.in_drag = FALSE;
4088
4089         if (view->adding_annot && view->pressed_button == 1) {
4090                 view->adding_annot = FALSE;
4091                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
4092                 view->pressed_button = -1;
4093
4094                 ev_view_create_annotation (view,
4095                                            view->adding_annot_type,
4096                                            event->x + view->scroll_x,
4097                                            event->y + view->scroll_y);
4098
4099                 return FALSE;
4100         }
4101
4102         if (view->pressed_button == 2) {
4103                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
4104         }
4105
4106         view->pressed_button = -1;
4107
4108         if (view->selection_scroll_id) {
4109             g_source_remove (view->selection_scroll_id);
4110             view->selection_scroll_id = 0;
4111         }
4112         if (view->selection_update_id) {
4113             g_source_remove (view->selection_update_id);
4114             view->selection_update_id = 0;
4115         }
4116
4117         if (view->selection_info.selections) {
4118                 clear_link_selected (view);
4119                 ev_view_update_primary_selection (view);
4120
4121                 if (view->selection_info.in_drag) {
4122                         clear_selection (view);
4123                         gtk_widget_queue_draw (widget);
4124                 }
4125
4126                 view->selection_info.in_drag = FALSE;
4127         } else if (link) {
4128                 if (event->button == 2) {
4129                         EvLinkAction    *action;
4130                         EvLinkActionType type;
4131
4132                         action = ev_link_get_action (link);
4133                         if (!action)
4134                                 return FALSE;
4135
4136                         type = ev_link_action_get_action_type (action);
4137                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
4138                                 g_signal_emit (view,
4139                                                signals[SIGNAL_EXTERNAL_LINK],
4140                                                0, action);
4141                         }
4142                 } else {
4143                         ev_view_handle_link (view, link);
4144                 }
4145         }
4146
4147         return FALSE;
4148 }
4149
4150 static gboolean
4151 ev_view_key_press_event (GtkWidget   *widget,
4152                          GdkEventKey *event)
4153 {
4154         EvView *view = EV_VIEW (widget);
4155
4156         if (!view->document)
4157                 return FALSE;
4158
4159         if (!gtk_widget_has_focus (widget)) {
4160                 /* Forward key events to current focused window child */
4161                 if (view->window_child_focus) {
4162                         GdkEventKey *new_event;
4163                         gboolean     handled;
4164
4165                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
4166                         g_object_unref (new_event->window);
4167                         new_event->window = gtk_widget_get_window (view->window_child_focus->window);
4168                         if (new_event->window)
4169                                 g_object_ref (new_event->window);
4170                         gtk_widget_realize (view->window_child_focus->window);
4171                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
4172                         gdk_event_free ((GdkEvent *)new_event);
4173
4174                         return handled;
4175                 }
4176
4177                 return FALSE;
4178         }
4179
4180 #if GTK_CHECK_VERSION (2, 90, 8)
4181         return gtk_bindings_activate_event (G_OBJECT (widget), event);
4182 #else
4183         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4184 #endif
4185 }
4186
4187 static gint
4188 ev_view_focus_in (GtkWidget     *widget,
4189                   GdkEventFocus *event)
4190 {
4191         if (EV_VIEW (widget)->pixbuf_cache)
4192                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4193         gtk_widget_queue_draw (widget);
4194
4195         return FALSE;
4196 }
4197
4198 static gint
4199 ev_view_focus_out (GtkWidget     *widget,
4200                    GdkEventFocus *event)
4201 {
4202         if (EV_VIEW (widget)->pixbuf_cache)
4203                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4204         gtk_widget_queue_draw (widget);
4205
4206         return FALSE;
4207 }
4208
4209 static gboolean
4210 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4211 {
4212         EvView *view = EV_VIEW (widget);
4213
4214         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4215                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4216
4217         return FALSE;
4218 }
4219
4220 static gboolean
4221 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4222 {
4223         EvView *view = EV_VIEW (widget);
4224
4225         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4226
4227         return FALSE;
4228 }
4229
4230 static void
4231 ev_view_style_set (GtkWidget *widget,
4232                    GtkStyle  *old_style)
4233 {
4234         if (EV_VIEW (widget)->pixbuf_cache)
4235                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4236
4237         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
4238 }
4239
4240 /*** Drawing ***/
4241
4242 static void
4243 draw_rubberband (EvView             *view,
4244                  cairo_t            *cr,
4245                  const GdkRectangle *rect,
4246                  gdouble             alpha)
4247 {
4248         GtkStyle *style;
4249         const GdkColor *fill_color_gdk;
4250         gdouble   r, g, b;
4251
4252         style = gtk_widget_get_style (GTK_WIDGET (view));
4253         fill_color_gdk = &style->base[GTK_STATE_SELECTED];
4254         r = fill_color_gdk->red / 65535.;
4255         g = fill_color_gdk->green / 65535.;
4256         b = fill_color_gdk->blue / 65535.;
4257
4258         cairo_save (cr);
4259
4260         cairo_set_source_rgba (cr, r, g, b, alpha);
4261         cairo_rectangle (cr,
4262                          rect->x - view->scroll_x,
4263                          rect->y - view->scroll_y,
4264                          rect->width, rect->height);
4265         cairo_fill_preserve (cr);
4266
4267         cairo_set_line_width (cr, 0.5);
4268         cairo_set_source_rgb (cr, r, g, b);
4269         cairo_stroke (cr);
4270
4271         cairo_restore (cr);
4272 }
4273
4274
4275 static void
4276 highlight_find_results (EvView *view,
4277                         cairo_t *cr,
4278                         int page)
4279 {
4280         gint       i, n_results = 0;
4281         n_results = ev_view_find_get_n_results (view, page);
4282
4283         for (i = 0; i < n_results; i++) {
4284                 EvRectangle *rectangle;
4285                 GdkRectangle view_rectangle;
4286                 gdouble      alpha;
4287
4288                 if (i == view->find_result && page == view->current_page) {
4289                         alpha = 0.6;
4290                 } else {
4291                         alpha = 0.3;
4292                 }
4293
4294                 rectangle = ev_view_find_get_result (view, page, i);
4295                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4296                 draw_rubberband (view, cr, &view_rectangle, alpha);
4297         }
4298 }
4299
4300 static void
4301 highlight_forward_search_results (EvView *view,
4302                                   cairo_t *cr,
4303                                   int page)
4304 {
4305         GdkRectangle rect;
4306         EvMapping   *mapping = view->synctex_result;
4307
4308         if (GPOINTER_TO_INT (mapping->data) != page)
4309                 return;
4310
4311         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4312
4313         cairo_save (cr);
4314         cairo_set_source_rgb (cr, 1., 0., 0.);
4315         cairo_rectangle (cr,
4316                          rect.x - view->scroll_x,
4317                          rect.y - view->scroll_y,
4318                          rect.width, rect.height);
4319         cairo_stroke (cr);
4320         cairo_restore (cr);
4321 }
4322
4323 static void
4324 focus_annotation (EvView       *view,
4325                   cairo_t      *cr,
4326                   gint          page,
4327                   GdkRectangle *clip)
4328 {
4329         GtkWidget    *widget = GTK_WIDGET (view);
4330         GdkRectangle  rect;
4331         EvMapping    *mapping = view->focus_annotation;
4332         EvAnnotation *annot = (EvAnnotation *)mapping->data;
4333
4334         if (ev_annotation_get_page_index (annot) != page)
4335                 return;
4336
4337         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4338 #if GTK_CHECK_VERSION (2, 90, 8)
4339         gtk_paint_focus (gtk_widget_get_style (widget),
4340                          cr,
4341                          gtk_widget_get_state (widget),
4342                          widget, NULL,
4343                          rect.x - view->scroll_x,
4344                          rect.y - view->scroll_y,
4345                          rect.width + 1, rect.height + 1);
4346 #else
4347         gtk_paint_focus (gtk_widget_get_style (widget),
4348                          gtk_layout_get_bin_window (GTK_LAYOUT (view)),
4349                          gtk_widget_get_state (widget),
4350                          NULL, widget, NULL,
4351                          rect.x - view->scroll_x,
4352                          rect.y - view->scroll_y,
4353                          rect.width + 1, rect.height + 1);
4354 #endif
4355 }
4356
4357 static void
4358 ev_view_loading_window_move (EvView *view)
4359 {
4360         GtkWidget       *widget = GTK_WIDGET (view);
4361         EvLoadingWindow *window = EV_LOADING_WINDOW (view->loading_window);
4362         gint             root_x, root_y;
4363         gint             window_width;
4364         GtkAllocation    allocation;
4365
4366         gtk_widget_get_allocation (widget, &allocation);
4367         gdk_window_get_origin (gtk_widget_get_window (widget), &root_x, &root_y);
4368         ev_loading_window_get_size (window, &window_width, NULL);
4369
4370         root_x += allocation.width - window_width - 10;
4371         root_y += 10;
4372
4373         ev_loading_window_move (window, root_x, root_y);
4374 }
4375
4376 static gboolean
4377 show_loading_window_cb (EvView *view)
4378 {
4379         if (!view->loading_window) {
4380                 GtkWindow *parent;
4381                 GdkScreen *screen;
4382
4383                 parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
4384                 view->loading_window = ev_loading_window_new (parent);
4385
4386                 /* Show the window off screen to get a valid size asap */
4387                 screen = gtk_widget_get_screen (GTK_WIDGET (view));
4388                 gtk_window_move (GTK_WINDOW (view->loading_window),
4389                                  gdk_screen_get_width (screen) + 1,
4390                                  gdk_screen_get_height (screen) + 1);
4391                 gtk_widget_show (view->loading_window);
4392         }
4393
4394         ev_view_loading_window_move (view);
4395
4396         gtk_widget_show (view->loading_window);
4397
4398         view->loading_timeout = 0;
4399
4400         return FALSE;
4401 }
4402
4403 static void
4404 show_loading_window (EvView *view)
4405 {
4406         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4407                 ev_view_loading_window_move (view);
4408                 return;
4409         }
4410
4411         if (!view->loading_timeout) {
4412                 view->loading_timeout =
4413                         g_timeout_add_full (G_PRIORITY_LOW,
4414                                             0.5, (GSourceFunc)show_loading_window_cb,
4415                                             view, NULL);
4416         }
4417 }
4418
4419 static void
4420 hide_loading_window (EvView *view)
4421 {
4422         if (view->loading_timeout) {
4423                 g_source_remove (view->loading_timeout);
4424                 view->loading_timeout = 0;
4425         }
4426
4427         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4428                 gtk_widget_hide (view->loading_window);
4429         }
4430 }
4431
4432 static void
4433 draw_one_page (EvView       *view,
4434                gint          page,
4435                cairo_t      *cr,
4436                GdkRectangle *page_area,
4437                GtkBorder    *border,
4438                GdkRectangle *expose_area,
4439                gboolean     *page_ready)
4440 {
4441         GdkRectangle overlap;
4442         GdkRectangle real_page_area;
4443         gint         current_page;
4444         gboolean     inverted_colors;
4445
4446         g_assert (view->document);
4447
4448         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4449                 return;
4450
4451         /* Render the document itself */
4452         real_page_area = *page_area;
4453
4454         real_page_area.x += border->left;
4455         real_page_area.y += border->top;
4456         real_page_area.width -= (border->left + border->right);
4457         real_page_area.height -= (border->top + border->bottom);
4458         *page_ready = TRUE;
4459
4460         current_page = ev_document_model_get_page (view->model);
4461         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4462         ev_document_misc_paint_one_page (cr,
4463                                          GTK_WIDGET (view),
4464                                          page_area, border,
4465                                          page == current_page,
4466                                          inverted_colors);
4467
4468         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4469                 gint             width, height;
4470                 gint             page_width, page_height;
4471                 cairo_surface_t *page_surface = NULL;
4472                 gint             selection_width, selection_height;
4473                 cairo_surface_t *selection_surface = NULL;
4474
4475                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4476
4477                 if (!page_surface) {
4478                         if (page == current_page)
4479                                 show_loading_window (view);
4480
4481                         *page_ready = FALSE;
4482
4483                         return;
4484                 }
4485
4486                 if (page == current_page)
4487                         hide_loading_window (view);
4488
4489                 ev_view_get_page_size (view, page, &width, &height);
4490
4491                 page_width = cairo_image_surface_get_width (page_surface);
4492                 page_height = cairo_image_surface_get_height (page_surface);
4493
4494                 cairo_save (cr);
4495                 cairo_translate (cr, overlap.x, overlap.y);
4496
4497                 if (width != page_width || height != page_height) {
4498                         cairo_pattern_set_filter (cairo_get_source (cr),
4499                                                   CAIRO_FILTER_FAST);
4500                         cairo_scale (cr,
4501                                      (gdouble)width / page_width,
4502                                      (gdouble)height / page_height);
4503                 }
4504
4505                 cairo_surface_set_device_offset (page_surface,
4506                                                  overlap.x - real_page_area.x,
4507                                                  overlap.y - real_page_area.y);
4508                 cairo_set_source_surface (cr, page_surface, 0, 0);
4509                 cairo_paint (cr);
4510                 cairo_restore (cr);
4511
4512                 /* Get the selection pixbuf iff we have something to draw */
4513                 if (find_selection_for_page (view, page) &&
4514                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4515                         selection_surface =
4516                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4517                                                                        page,
4518                                                                        view->scale,
4519                                                                        NULL);
4520                 }
4521
4522                 if (!selection_surface) {
4523                         return;
4524                 }
4525
4526                 selection_width = cairo_image_surface_get_width (selection_surface);
4527                 selection_height = cairo_image_surface_get_height (selection_surface);
4528
4529                 cairo_save (cr);
4530                 cairo_translate (cr, overlap.x, overlap.y);
4531
4532                 if (width != selection_width || height != selection_height) {
4533                         cairo_pattern_set_filter (cairo_get_source (cr),
4534                                                   CAIRO_FILTER_FAST);
4535                         cairo_scale (cr,
4536                                      (gdouble)width / selection_width,
4537                                      (gdouble)height / selection_height);
4538                 }
4539
4540                 cairo_surface_set_device_offset (selection_surface,
4541                                                  overlap.x - real_page_area.x,
4542                                                  overlap.y - real_page_area.y);
4543
4544                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4545                 cairo_paint (cr);
4546                 cairo_restore (cr);
4547         }
4548 }
4549
4550 /*** GObject functions ***/
4551
4552 static void
4553 ev_view_finalize (GObject *object)
4554 {
4555         EvView *view = EV_VIEW (object);
4556
4557         clear_selection (view);
4558         clear_link_selected (view);
4559
4560         if (view->synctex_result) {
4561                 g_free (view->synctex_result);
4562                 view->synctex_result = NULL;
4563         }
4564
4565         if (view->image_dnd_info.image)
4566                 g_object_unref (view->image_dnd_info.image);
4567         view->image_dnd_info.image = NULL;
4568
4569         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4570 }
4571
4572 static void
4573 ev_view_dispose (GObject *object)
4574 {
4575         EvView *view = EV_VIEW (object);
4576
4577         if (view->model) {
4578                 g_object_unref (view->model);
4579                 view->model = NULL;
4580         }
4581
4582         if (view->pixbuf_cache) {
4583                 g_object_unref (view->pixbuf_cache);
4584                 view->pixbuf_cache = NULL;
4585         }
4586
4587         if (view->document) {
4588                 g_object_unref (view->document);
4589                 view->document = NULL;
4590         }
4591
4592         if (view->page_cache) {
4593                 g_object_unref (view->page_cache);
4594                 view->page_cache = NULL;
4595         }
4596
4597         ev_view_window_children_free (view);
4598
4599         if (view->selection_scroll_id) {
4600             g_source_remove (view->selection_scroll_id);
4601             view->selection_scroll_id = 0;
4602         }
4603
4604         if (view->selection_update_id) {
4605             g_source_remove (view->selection_update_id);
4606             view->selection_update_id = 0;
4607         }
4608
4609         if (view->scroll_info.timeout_id) {
4610             g_source_remove (view->scroll_info.timeout_id);
4611             view->scroll_info.timeout_id = 0;
4612         }
4613
4614         if (view->drag_info.drag_timeout_id) {
4615                 g_source_remove (view->drag_info.drag_timeout_id);
4616                 view->drag_info.drag_timeout_id = 0;
4617         }
4618
4619         if (view->drag_info.release_timeout_id) {
4620                 g_source_remove (view->drag_info.release_timeout_id);
4621                 view->drag_info.release_timeout_id = 0;
4622         }
4623
4624         if (view->loading_timeout) {
4625                 g_source_remove (view->loading_timeout);
4626                 view->loading_timeout = 0;
4627         }
4628
4629         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4630
4631         G_OBJECT_CLASS (ev_view_parent_class)->dispose (object);
4632 }
4633
4634 static AtkObject *
4635 ev_view_get_accessible (GtkWidget *widget)
4636 {
4637         static gboolean first_time = TRUE;
4638
4639         if (first_time) {
4640                 AtkObjectFactory *factory;
4641                 AtkRegistry *registry;
4642                 GType derived_type;
4643                 GType derived_atk_type;
4644
4645                 /*
4646                  * Figure out whether accessibility is enabled by looking at the
4647                  * type of the accessible object which would be created for
4648                  * the parent type of EvView.
4649                  */
4650                 derived_type = g_type_parent (EV_TYPE_VIEW);
4651
4652                 registry = atk_get_default_registry ();
4653                 factory = atk_registry_get_factory (registry,
4654                                                     derived_type);
4655                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4656                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE)) {
4657                         atk_registry_set_factory_type (registry,
4658                                                        EV_TYPE_VIEW,
4659                                                        ev_view_accessible_factory_get_type ());
4660                         EV_VIEW (widget)->a11y_enabled = TRUE;
4661                 }
4662                 first_time = FALSE;
4663         }
4664         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4665 }
4666
4667 static void
4668 ev_view_class_init (EvViewClass *class)
4669 {
4670         GObjectClass *object_class = G_OBJECT_CLASS (class);
4671         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4672         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4673         GtkBindingSet *binding_set;
4674
4675         object_class->dispose = ev_view_dispose;
4676         object_class->finalize = ev_view_finalize;
4677
4678 #if GTK_CHECK_VERSION (2, 90, 8)
4679         widget_class->draw = ev_view_draw;
4680 #else
4681         widget_class->expose_event = ev_view_expose_event;
4682 #endif
4683         widget_class->button_press_event = ev_view_button_press_event;
4684         widget_class->motion_notify_event = ev_view_motion_notify_event;
4685         widget_class->button_release_event = ev_view_button_release_event;
4686         widget_class->key_press_event = ev_view_key_press_event;
4687         widget_class->focus_in_event = ev_view_focus_in;
4688         widget_class->focus_out_event = ev_view_focus_out;
4689         widget_class->get_accessible = ev_view_get_accessible;
4690         widget_class->size_request = ev_view_size_request;
4691         widget_class->size_allocate = ev_view_size_allocate;
4692         widget_class->realize = ev_view_realize;
4693         widget_class->scroll_event = ev_view_scroll_event;
4694         widget_class->enter_notify_event = ev_view_enter_notify_event;
4695         widget_class->leave_notify_event = ev_view_leave_notify_event;
4696         widget_class->style_set = ev_view_style_set;
4697         widget_class->drag_data_get = ev_view_drag_data_get;
4698         widget_class->drag_motion = ev_view_drag_motion;
4699         widget_class->popup_menu = ev_view_popup_menu;
4700         widget_class->query_tooltip = ev_view_query_tooltip;
4701
4702         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4703
4704         class->binding_activated = ev_view_scroll;
4705
4706         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4707                          G_TYPE_FROM_CLASS (object_class),
4708                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4709                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4710                          NULL, NULL,
4711                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4712                          G_TYPE_NONE, 2,
4713                          GTK_TYPE_SCROLL_TYPE,
4714                          G_TYPE_BOOLEAN);
4715         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4716                          G_TYPE_FROM_CLASS (object_class),
4717                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4718                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4719                          NULL, NULL,
4720                          g_cclosure_marshal_VOID__OBJECT,
4721                          G_TYPE_NONE, 1,
4722                          G_TYPE_OBJECT);
4723         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4724                          G_TYPE_FROM_CLASS (object_class),
4725                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4726                          G_STRUCT_OFFSET (EvViewClass, external_link),
4727                          NULL, NULL,
4728                          g_cclosure_marshal_VOID__OBJECT,
4729                          G_TYPE_NONE, 1,
4730                          G_TYPE_OBJECT);
4731         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4732                          G_TYPE_FROM_CLASS (object_class),
4733                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4734                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4735                          NULL, NULL,
4736                          g_cclosure_marshal_VOID__POINTER,
4737                          G_TYPE_NONE, 1,
4738                          G_TYPE_POINTER);
4739         signals[SIGNAL_SELECTION_CHANGED] = g_signal_new ("selection-changed",
4740                          G_TYPE_FROM_CLASS (object_class),
4741                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4742                          G_STRUCT_OFFSET (EvViewClass, selection_changed),
4743                          NULL, NULL,
4744                          g_cclosure_marshal_VOID__VOID,
4745                          G_TYPE_NONE, 0,
4746                          G_TYPE_NONE);
4747         signals[SIGNAL_SYNC_SOURCE] = g_signal_new ("sync-source",
4748                          G_TYPE_FROM_CLASS (object_class),
4749                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4750                          G_STRUCT_OFFSET (EvViewClass, sync_source),
4751                          NULL, NULL,
4752                          g_cclosure_marshal_VOID__POINTER,
4753                          G_TYPE_NONE, 1,
4754                          G_TYPE_POINTER);
4755         signals[SIGNAL_ANNOT_ADDED] = g_signal_new ("annot-added",
4756                          G_TYPE_FROM_CLASS (object_class),
4757                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4758                          G_STRUCT_OFFSET (EvViewClass, annot_added),
4759                          NULL, NULL,
4760                          g_cclosure_marshal_VOID__OBJECT,
4761                          G_TYPE_NONE, 1,
4762                          EV_TYPE_ANNOTATION);
4763         signals[SIGNAL_LAYERS_CHANGED] = g_signal_new ("layers-changed",
4764                          G_TYPE_FROM_CLASS (object_class),
4765                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4766                          G_STRUCT_OFFSET (EvViewClass, layers_changed),
4767                          NULL, NULL,
4768                          g_cclosure_marshal_VOID__VOID,
4769                          G_TYPE_NONE, 0,
4770                          G_TYPE_NONE);
4771
4772         binding_set = gtk_binding_set_by_class (class);
4773
4774         add_scroll_binding_keypad (binding_set, GDK_KEY_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4775         add_scroll_binding_keypad (binding_set, GDK_KEY_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4776         add_scroll_binding_keypad (binding_set, GDK_KEY_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4777         add_scroll_binding_keypad (binding_set, GDK_KEY_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4778         add_scroll_binding_keypad (binding_set, GDK_KEY_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4779         add_scroll_binding_keypad (binding_set, GDK_KEY_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4780         add_scroll_binding_keypad (binding_set, GDK_KEY_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4781         add_scroll_binding_keypad (binding_set, GDK_KEY_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4782         gtk_binding_entry_add_signal (binding_set, GDK_KEY_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4783                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4784         gtk_binding_entry_add_signal (binding_set, GDK_KEY_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4785                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4786         gtk_binding_entry_add_signal (binding_set, GDK_KEY_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4787                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4788         gtk_binding_entry_add_signal (binding_set, GDK_KEY_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4789                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4790
4791 }
4792
4793 static void
4794 ev_view_init (EvView *view)
4795 {
4796         gtk_widget_set_can_focus (GTK_WIDGET (view), TRUE);
4797
4798         view->start_page = -1;
4799         view->end_page = -1;
4800         view->spacing = 5;
4801         view->scale = 1.0;
4802         view->current_page = 0;
4803         view->pressed_button = -1;
4804         view->cursor = EV_VIEW_CURSOR_NORMAL;
4805         view->drag_info.in_drag = FALSE;
4806         view->scroll_info.autoscrolling = FALSE;
4807         view->selection_info.selections = NULL;
4808         view->selection_info.in_selection = FALSE;
4809         view->selection_info.in_drag = FALSE;
4810         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4811         view->continuous = TRUE;
4812         view->dual_page = FALSE;
4813         view->fullscreen = FALSE;
4814         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4815         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4816         view->jump_to_find_result = TRUE;
4817         view->highlight_find_results = FALSE;
4818
4819         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4820         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4821 }
4822
4823 /*** Callbacks ***/
4824
4825 static void
4826 ev_view_change_page (EvView *view,
4827                      gint    new_page)
4828 {
4829         gint x, y;
4830
4831         view->current_page = new_page;
4832         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4833
4834         hide_loading_window (view);
4835
4836         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4837         ev_view_handle_cursor_over_xy (view, x, y);
4838
4839         gtk_widget_queue_resize (GTK_WIDGET (view));
4840 }
4841
4842 static void
4843 job_finished_cb (EvPixbufCache  *pixbuf_cache,
4844                  cairo_region_t *region,
4845                  EvView         *view)
4846 {
4847         if (region) {
4848                 GdkWindow *bin_window;
4849
4850                 bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4851 #if GTK_CHECK_VERSION(2, 90, 5)
4852                 gdk_window_invalidate_region (bin_window, region, TRUE);
4853 #else
4854         {
4855                 GdkRegion *gdk_region = gdk_region_new ();
4856                 guint      n_recs = cairo_region_num_rectangles (region);
4857                 guint      i;
4858
4859                 for (i = 0; i < n_recs; i++) {
4860                         cairo_rectangle_int_t rect;
4861
4862                         cairo_region_get_rectangle (region, i, &rect);
4863                         gdk_region_union_with_rect (gdk_region, (GdkRectangle *)&rect);
4864                 }
4865                 gdk_window_invalidate_region (bin_window, gdk_region, TRUE);
4866                 gdk_region_destroy (gdk_region);
4867         }
4868 #endif
4869         } else {
4870                 gtk_widget_queue_draw (GTK_WIDGET (view));
4871         }
4872 }
4873
4874 static void
4875 ev_view_page_changed_cb (EvDocumentModel *model,
4876                          gint             old_page,
4877                          gint             new_page,
4878                          EvView          *view)
4879 {
4880         if (!view->document)
4881                 return;
4882
4883         if (view->current_page != new_page) {
4884                 ev_view_change_page (view, new_page);
4885         } else {
4886                 gtk_widget_queue_draw (GTK_WIDGET (view));
4887         }
4888
4889         view->find_result = 0;
4890 }
4891
4892 static void
4893 on_adjustment_value_changed (GtkAdjustment *adjustment,
4894                              EvView        *view)
4895 {
4896         int dx = 0, dy = 0;
4897         gint x, y;
4898         gint value;
4899         GList *children, *l;
4900
4901         if (!gtk_widget_get_realized (GTK_WIDGET (view)))
4902                 return;
4903
4904         if (view->hadjustment) {
4905                 value = (gint) gtk_adjustment_get_value (view->hadjustment);
4906                 dx = view->scroll_x - value;
4907                 view->scroll_x = value;
4908         } else {
4909                 view->scroll_x = 0;
4910         }
4911
4912         if (view->vadjustment) {
4913                 value = (gint) gtk_adjustment_get_value (view->vadjustment);
4914                 dy = view->scroll_y - value;
4915                 view->scroll_y = value;
4916         } else {
4917                 view->scroll_y = 0;
4918         }
4919
4920         children = gtk_container_get_children (GTK_CONTAINER (view));
4921         for (l = children; l && l->data; l = g_list_next (l)) {
4922                 gint       child_x, child_y;
4923                 GtkWidget *child = (GtkWidget *)l->data;
4924
4925                 gtk_container_child_get (GTK_CONTAINER (view),
4926                                          child,
4927                                          "x", &child_x,
4928                                          "y", &child_y,
4929                                          NULL);
4930                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4931         }
4932         g_list_free (children);
4933
4934         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4935                 EvViewWindowChild *child;
4936
4937                 child = (EvViewWindowChild *)l->data;
4938
4939                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4940         }
4941
4942         if (view->pending_resize) {
4943                 gtk_widget_queue_draw (GTK_WIDGET (view));
4944         } else {
4945                 GdkWindow *bin_window;
4946
4947                 bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4948                 gdk_window_scroll (bin_window, dx, dy);
4949         }
4950
4951         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4952         ev_view_handle_cursor_over_xy (view, x, y);
4953
4954         if (view->document)
4955                 view_update_range_and_current_page (view);
4956 }
4957
4958 GtkWidget*
4959 ev_view_new (void)
4960 {
4961         GtkWidget *view;
4962
4963         view = g_object_new (EV_TYPE_VIEW, NULL);
4964
4965         return view;
4966 }
4967
4968 static void
4969 setup_caches (EvView *view)
4970 {
4971         gboolean inverted_colors;
4972
4973         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
4974         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->model, view->pixbuf_cache_size);
4975         view->page_cache = ev_page_cache_new (view->document);
4976         if (view->a11y_enabled) {
4977                 EvJobPageDataFlags flags = ev_page_cache_get_flags (view->page_cache);
4978
4979                 ev_page_cache_set_flags (view->page_cache,
4980                                          flags |
4981                                          EV_PAGE_DATA_INCLUDE_TEXT_LAYOUT |
4982                                          EV_PAGE_DATA_INCLUDE_TEXT);
4983         }
4984         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4985         ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
4986         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4987 }
4988
4989 static void
4990 clear_caches (EvView *view)
4991 {
4992         if (view->pixbuf_cache) {
4993                 g_object_unref (view->pixbuf_cache);
4994                 view->pixbuf_cache = NULL;
4995         }
4996
4997         if (view->page_cache) {
4998                 g_object_unref (view->page_cache);
4999                 view->page_cache = NULL;
5000         }
5001 }
5002
5003 /**
5004  * ev_view_set_page_cache_size:
5005  * @view:
5006  * @cache_size:
5007  *
5008  * Sets the maximum size in bytes that will be used to cache
5009  * rendered pages. Use 0 to disable caching rendered pages.
5010  *
5011  * Note that this limit doesn't affect the current visible page range,
5012  * which will always be rendered. In order to limit the total memory used
5013  * you have to use ev_document_model_set_max_scale() too.
5014  *
5015  */
5016 void
5017 ev_view_set_page_cache_size (EvView *view,
5018                              gsize   cache_size)
5019 {
5020         if (view->pixbuf_cache_size == cache_size)
5021                 return;
5022
5023         view->pixbuf_cache_size = cache_size;
5024         if (view->pixbuf_cache)
5025                 ev_pixbuf_cache_set_max_size (view->pixbuf_cache, cache_size);
5026 }
5027
5028 void
5029 ev_view_set_loading (EvView       *view,
5030                      gboolean      loading)
5031 {
5032         if (view->loading && !loading)
5033                 hide_loading_window (view);
5034         view->loading = loading;
5035         gtk_widget_queue_draw (GTK_WIDGET (view));
5036 }
5037
5038 static gboolean
5039 ev_view_autoscroll_cb (EvView *view)
5040 {
5041         gdouble speed, value;
5042
5043         /* If the user stops autoscrolling, autoscrolling will be
5044          * set to false but the timeout will continue; stop the timeout: */
5045         if (!view->scroll_info.autoscrolling) {
5046                 view->scroll_info.timeout_id = 0;
5047                 return FALSE;
5048         }
5049
5050         if (view->scroll_info.last_y > view->scroll_info.start_y &&
5051                 (view->scroll_info.last_y < view->scroll_info.start_y))
5052                 return TRUE;
5053
5054         /* Replace 100 with your speed of choice: The lower the faster.
5055          * Replace 3 with another speed of choice: The higher, the faster it accelerated
5056          *      based on the distance of the starting point from the mouse
5057          * (All also effected by the timeout interval of this callback) */
5058
5059         if (view->scroll_info.start_y > view->scroll_info.last_y)
5060                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
5061         else
5062                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
5063
5064         value = gtk_adjustment_get_value (view->vadjustment);
5065         value = CLAMP (value + speed, 0,
5066                        gtk_adjustment_get_upper (view->vadjustment) -
5067                        gtk_adjustment_get_page_size (view->vadjustment));
5068         gtk_adjustment_set_value (view->vadjustment, value);
5069
5070         return TRUE;
5071
5072 }
5073
5074 void
5075 ev_view_autoscroll_start (EvView *view)
5076 {
5077         gint x, y;
5078
5079         g_return_if_fail (EV_IS_VIEW (view));
5080
5081         if (view->scroll_info.autoscrolling)
5082                 return;
5083
5084         view->scroll_info.autoscrolling = TRUE;
5085         view->scroll_info.timeout_id =
5086                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5087                                view);
5088
5089         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5090         ev_view_handle_cursor_over_xy (view, x, y);
5091 }
5092
5093 void
5094 ev_view_autoscroll_stop (EvView *view)
5095 {
5096         gint x, y;
5097
5098         g_return_if_fail (EV_IS_VIEW (view));
5099
5100         if (!view->scroll_info.autoscrolling)
5101                 return;
5102
5103         view->scroll_info.autoscrolling = FALSE;
5104         if (view->scroll_info.timeout_id) {
5105                 g_source_remove (view->scroll_info.timeout_id);
5106                 view->scroll_info.timeout_id = 0;
5107         }
5108
5109         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5110         ev_view_handle_cursor_over_xy (view, x, y);
5111 }
5112
5113 static void
5114 ev_view_document_changed_cb (EvDocumentModel *model,
5115                              GParamSpec      *pspec,
5116                              EvView          *view)
5117 {
5118         EvDocument *document = ev_document_model_get_document (model);
5119
5120         if (document != view->document) {
5121                 gint current_page;
5122
5123                 clear_caches (view);
5124
5125                 if (view->document) {
5126                         g_object_unref (view->document);
5127                 }
5128
5129                 view->document = document;
5130                 view->find_result = 0;
5131
5132                 if (view->document) {
5133                         view->loading = FALSE;
5134                         g_object_ref (view->document);
5135                         setup_caches (view);
5136                 }
5137
5138                 current_page = ev_document_model_get_page (model);
5139                 if (view->current_page != current_page) {
5140                         ev_view_change_page (view, current_page);
5141                 } else {
5142                         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
5143                         gtk_widget_queue_resize (GTK_WIDGET (view));
5144                 }
5145         }
5146 }
5147
5148 static void
5149 ev_view_rotation_changed_cb (EvDocumentModel *model,
5150                              GParamSpec      *pspec,
5151                              EvView          *view)
5152 {
5153         gint rotation = ev_document_model_get_rotation (model);
5154
5155         view->rotation = rotation;
5156
5157         if (view->pixbuf_cache) {
5158                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5159                 if (!ev_document_is_page_size_uniform (view->document))
5160                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5161                 gtk_widget_queue_resize (GTK_WIDGET (view));
5162         }
5163
5164         ev_view_remove_all (view);
5165
5166         if (rotation != 0)
5167                 clear_selection (view);
5168 }
5169
5170 static void
5171 ev_view_inverted_colors_changed_cb (EvDocumentModel *model,
5172                                     GParamSpec      *pspec,
5173                                     EvView          *view)
5174 {
5175         if (view->pixbuf_cache) {
5176                 gboolean inverted_colors;
5177
5178                 inverted_colors = ev_document_model_get_inverted_colors (model);
5179                 ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
5180                 gtk_widget_queue_draw (GTK_WIDGET (view));
5181         }
5182 }
5183
5184 static void
5185 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
5186                                 GParamSpec      *pspec,
5187                                 EvView          *view)
5188 {
5189         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
5190
5191         view->sizing_mode = mode;
5192         if (mode != EV_SIZING_FREE)
5193                 gtk_widget_queue_resize (GTK_WIDGET (view));
5194 }
5195
5196 #define EPSILON 0.0000001
5197 static void
5198 ev_view_scale_changed_cb (EvDocumentModel *model,
5199                           GParamSpec      *pspec,
5200                           EvView          *view)
5201 {
5202         gdouble scale = ev_document_model_get_scale (model);
5203
5204         if (ABS (view->scale - scale) < EPSILON)
5205                 return;
5206
5207         view->scale = scale;
5208
5209         view->pending_resize = TRUE;
5210         if (view->sizing_mode == EV_SIZING_FREE)
5211                 gtk_widget_queue_resize (GTK_WIDGET (view));
5212 }
5213
5214 static void
5215 ev_view_continuous_changed_cb (EvDocumentModel *model,
5216                                GParamSpec      *pspec,
5217                                EvView          *view)
5218 {
5219         gboolean continuous = ev_document_model_get_continuous (model);
5220
5221         view->continuous = continuous;
5222         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5223         gtk_widget_queue_resize (GTK_WIDGET (view));
5224 }
5225
5226 static void
5227 ev_view_dual_page_changed_cb (EvDocumentModel *model,
5228                               GParamSpec      *pspec,
5229                               EvView          *view)
5230 {
5231         gboolean dual_page = ev_document_model_get_dual_page (model);
5232
5233         view->dual_page = dual_page;
5234         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5235         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5236          * preload_cache_size to be 2 if dual_page is set.
5237          */
5238         gtk_widget_queue_resize (GTK_WIDGET (view));
5239 }
5240
5241 static void
5242 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
5243                                GParamSpec      *pspec,
5244                                EvView          *view)
5245 {
5246         gboolean fullscreen = ev_document_model_get_fullscreen (model);
5247
5248         view->fullscreen = fullscreen;
5249         gtk_widget_queue_resize (GTK_WIDGET (view));
5250 }
5251
5252 void
5253 ev_view_set_model (EvView          *view,
5254                    EvDocumentModel *model)
5255 {
5256         g_return_if_fail (EV_IS_VIEW (view));
5257         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
5258
5259         if (model == view->model)
5260                 return;
5261
5262         if (view->model) {
5263                 g_signal_handlers_disconnect_by_func (view->model,
5264                                                       ev_view_document_changed_cb,
5265                                                       view);
5266                 g_signal_handlers_disconnect_by_func (view->model,
5267                                                       ev_view_page_changed_cb,
5268                                                       view);
5269                 g_object_unref (view->model);
5270         }
5271         view->model = g_object_ref (model);
5272
5273         /* Initialize view from model */
5274         view->rotation = ev_document_model_get_rotation (view->model);
5275         view->sizing_mode = ev_document_model_get_sizing_mode (view->model);
5276         view->scale = ev_document_model_get_scale (view->model);
5277         view->continuous = ev_document_model_get_continuous (view->model);
5278         view->dual_page = ev_document_model_get_dual_page (view->model);
5279         view->fullscreen = ev_document_model_get_fullscreen (view->model);
5280         ev_view_document_changed_cb (view->model, NULL, view);
5281
5282         g_signal_connect (view->model, "notify::document",
5283                           G_CALLBACK (ev_view_document_changed_cb),
5284                           view);
5285         g_signal_connect (view->model, "notify::rotation",
5286                           G_CALLBACK (ev_view_rotation_changed_cb),
5287                           view);
5288         g_signal_connect (view->model, "notify::inverted-colors",
5289                           G_CALLBACK (ev_view_inverted_colors_changed_cb),
5290                           view);
5291         g_signal_connect (view->model, "notify::sizing-mode",
5292                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
5293                           view);
5294         g_signal_connect (view->model, "notify::scale",
5295                           G_CALLBACK (ev_view_scale_changed_cb),
5296                           view);
5297         g_signal_connect (view->model, "notify::continuous",
5298                           G_CALLBACK (ev_view_continuous_changed_cb),
5299                           view);
5300         g_signal_connect (view->model, "notify::dual-page",
5301                           G_CALLBACK (ev_view_dual_page_changed_cb),
5302                           view);
5303         g_signal_connect (view->model, "notify::fullscreen",
5304                           G_CALLBACK (ev_view_fullscreen_changed_cb),
5305                           view);
5306         g_signal_connect (view->model, "page-changed",
5307                           G_CALLBACK (ev_view_page_changed_cb),
5308                           view);
5309 }
5310
5311 static void
5312 ev_view_reload_page (EvView         *view,
5313                      gint            page,
5314                      cairo_region_t *region)
5315 {
5316         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5317                                      region,
5318                                      page,
5319                                      view->rotation,
5320                                      view->scale);
5321 }
5322
5323 void
5324 ev_view_reload (EvView *view)
5325 {
5326         ev_pixbuf_cache_clear (view->pixbuf_cache);
5327         view_update_range_and_current_page (view);
5328 }
5329
5330 /*** Zoom and sizing mode ***/
5331
5332 gboolean
5333 ev_view_can_zoom_in (EvView *view)
5334 {
5335         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
5336 }
5337
5338 gboolean
5339 ev_view_can_zoom_out (EvView *view)
5340 {
5341         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
5342 }
5343
5344 void
5345 ev_view_zoom_in (EvView *view)
5346 {
5347         gdouble scale;
5348
5349         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5350
5351         view->pending_scroll = SCROLL_TO_CENTER;
5352         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
5353         ev_document_model_set_scale (view->model, scale);
5354 }
5355
5356 void
5357 ev_view_zoom_out (EvView *view)
5358 {
5359         gdouble scale;
5360
5361         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5362
5363         view->pending_scroll = SCROLL_TO_CENTER;
5364         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5365         ev_document_model_set_scale (view->model, scale);
5366 }
5367
5368 static double
5369 zoom_for_size_fit_width (gdouble doc_width,
5370                          gdouble doc_height,
5371                          int     target_width,
5372                          int     target_height)
5373 {
5374         return (double)target_width / doc_width;
5375 }
5376
5377 static double
5378 zoom_for_size_fit_height (gdouble doc_width,
5379                           gdouble doc_height,
5380                           int     target_width,
5381                           int     target_height)
5382 {
5383         return (double)target_height / doc_height;
5384 }
5385
5386 static double
5387 zoom_for_size_best_fit (gdouble doc_width,
5388                         gdouble doc_height,
5389                         int     target_width,
5390                         int     target_height)
5391 {
5392         double w_scale;
5393         double h_scale;
5394
5395         w_scale = (double)target_width / doc_width;
5396         h_scale = (double)target_height / doc_height;
5397
5398         return MIN (w_scale, h_scale);
5399 }
5400
5401 static void
5402 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5403                                                 int     width,
5404                                                 int     height)
5405 {
5406         gdouble doc_width, doc_height;
5407         GtkBorder border;
5408         gdouble scale;
5409         gint sb_size;
5410
5411         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5412         if (view->rotation == 90 || view->rotation == 270) {
5413                 gdouble tmp;
5414
5415                 tmp = doc_width;
5416                 doc_width = doc_height;
5417                 doc_height = tmp;
5418         }
5419
5420         compute_border (view, doc_width, doc_height, &border);
5421
5422         doc_width *= 2;
5423         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5424         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5425
5426         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5427
5428         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5429                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5430         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5431                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5432         else
5433                 g_assert_not_reached ();
5434
5435         ev_document_model_set_scale (view->model, scale);
5436 }
5437
5438 static void
5439 ev_view_zoom_for_size_continuous (EvView *view,
5440                                   int     width,
5441                                   int     height)
5442 {
5443         gdouble doc_width, doc_height;
5444         GtkBorder border;
5445         gdouble scale;
5446         gint sb_size;
5447
5448         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5449         if (view->rotation == 90 || view->rotation == 270) {
5450                 gdouble tmp;
5451
5452                 tmp = doc_width;
5453                 doc_width = doc_height;
5454                 doc_height = tmp;
5455         }
5456
5457         compute_border (view, doc_width, doc_height, &border);
5458
5459         width -= (border.left + border.right + 2 * view->spacing);
5460         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5461
5462         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5463
5464         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5465                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5466         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5467                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5468         else
5469                 g_assert_not_reached ();
5470
5471         ev_document_model_set_scale (view->model, scale);
5472 }
5473
5474 static void
5475 ev_view_zoom_for_size_dual_page (EvView *view,
5476                                  int     width,
5477                                  int     height)
5478 {
5479         GtkBorder border;
5480         gdouble doc_width, doc_height;
5481         gdouble scale;
5482         gint other_page;
5483
5484         other_page = view->current_page ^ 1;
5485
5486         /* Find the largest of the two. */
5487         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5488         if (other_page < ev_document_get_n_pages (view->document)) {
5489                 gdouble width_2, height_2;
5490
5491                 get_doc_page_size (view, other_page, &width_2, &height_2);
5492                 if (width_2 > doc_width)
5493                         doc_width = width_2;
5494                 if (height_2 > doc_height)
5495                         doc_height = height_2;
5496         }
5497         compute_border (view, width, height, &border);
5498
5499         doc_width = doc_width * 2;
5500         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5501         height -= (border.top + border.bottom + 2 * view->spacing);
5502
5503         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5504                 gint sb_size;
5505
5506                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5507                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5508         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5509                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5510         else
5511                 g_assert_not_reached ();
5512
5513         ev_document_model_set_scale (view->model, scale);
5514 }
5515
5516 static void
5517 ev_view_zoom_for_size_single_page (EvView *view,
5518                                    int     width,
5519                                    int     height)
5520 {
5521         gdouble doc_width, doc_height;
5522         GtkBorder border;
5523         gdouble scale;
5524
5525         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5526
5527         /* Get an approximate border */
5528         compute_border (view, width, height, &border);
5529
5530         width -= (border.left + border.right + 2 * view->spacing);
5531         height -= (border.top + border.bottom + 2 * view->spacing);
5532
5533         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5534                 gint sb_size;
5535
5536                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5537                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5538         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5539                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5540         else
5541                 g_assert_not_reached ();
5542
5543         ev_document_model_set_scale (view->model, scale);
5544 }
5545
5546 static void
5547 ev_view_zoom_for_size (EvView *view,
5548                        int     width,
5549                        int     height)
5550 {
5551         g_return_if_fail (EV_IS_VIEW (view));
5552         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5553                           view->sizing_mode == EV_SIZING_BEST_FIT);
5554         g_return_if_fail (width >= 0);
5555         g_return_if_fail (height >= 0);
5556
5557         if (view->document == NULL)
5558                 return;
5559
5560         if (view->continuous && view->dual_page)
5561                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5562         else if (view->continuous)
5563                 ev_view_zoom_for_size_continuous (view, width, height);
5564         else if (view->dual_page)
5565                 ev_view_zoom_for_size_dual_page (view, width, height);
5566         else
5567                 ev_view_zoom_for_size_single_page (view, width, height);
5568 }
5569
5570 /*** Find ***/
5571 static gint
5572 ev_view_find_get_n_results (EvView *view, gint page)
5573 {
5574         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5575 }
5576
5577 static EvRectangle *
5578 ev_view_find_get_result (EvView *view, gint page, gint result)
5579 {
5580         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5581 }
5582
5583 static void
5584 jump_to_find_result (EvView *view)
5585 {
5586         gint n_results;
5587         gint page = view->current_page;
5588
5589         n_results = ev_view_find_get_n_results (view, page);
5590
5591         if (n_results > 0 && view->find_result < n_results) {
5592                 EvRectangle *rect;
5593                 GdkRectangle view_rect;
5594
5595                 rect = ev_view_find_get_result (view, page, view->find_result);
5596                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5597                 ensure_rectangle_is_visible (view, &view_rect);
5598                 view->jump_to_find_result = FALSE;
5599         }
5600 }
5601
5602 /**
5603  * jump_to_find_page
5604  * @view: #EvView instance
5605  * @direction: Direction to look
5606  * @shift: Shift from current page
5607  *
5608  * Jumps to the first page that has occurences of searched word.
5609  * Uses a direction where to look and a shift from current page.
5610  *
5611  */
5612 static void
5613 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5614 {
5615         int n_pages, i;
5616
5617         n_pages = ev_document_get_n_pages (view->document);
5618
5619         for (i = 0; i < n_pages; i++) {
5620                 int page;
5621
5622                 if (direction == EV_VIEW_FIND_NEXT)
5623                         page = view->current_page + i;
5624                 else
5625                         page = view->current_page - i;
5626                 page += shift;
5627
5628                 if (page >= n_pages) {
5629                         page = page - n_pages;
5630                 } else if (page < 0)
5631                         page = page + n_pages;
5632
5633                 if (ev_view_find_get_n_results (view, page) > 0) {
5634                         ev_document_model_set_page (view->model, page);
5635                         break;
5636                 }
5637         }
5638 }
5639
5640 void
5641 ev_view_find_changed (EvView *view, GList **results, gint page)
5642 {
5643         view->find_pages = results;
5644
5645         if (view->jump_to_find_result == TRUE) {
5646                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5647                 jump_to_find_result (view);
5648         }
5649
5650         if (view->current_page == page)
5651                 gtk_widget_queue_draw (GTK_WIDGET (view));
5652 }
5653
5654 void
5655 ev_view_find_next (EvView *view)
5656 {
5657         gint n_results;
5658
5659         n_results = ev_view_find_get_n_results (view, view->current_page);
5660         view->find_result++;
5661
5662         if (view->find_result >= n_results) {
5663                 view->find_result = 0;
5664                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5665                 jump_to_find_result (view);
5666         } else {
5667                 jump_to_find_result (view);
5668                 gtk_widget_queue_draw (GTK_WIDGET (view));
5669         }
5670 }
5671
5672 void
5673 ev_view_find_previous (EvView *view)
5674 {
5675         view->find_result--;
5676
5677         if (view->find_result < 0) {
5678                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5679                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5680                 jump_to_find_result (view);
5681         } else {
5682                 jump_to_find_result (view);
5683                 gtk_widget_queue_draw (GTK_WIDGET (view));
5684         }
5685 }
5686
5687 void
5688 ev_view_find_search_changed (EvView *view)
5689 {
5690         /* search string has changed, focus on new search result */
5691         view->jump_to_find_result = TRUE;
5692         view->find_pages = NULL;
5693 }
5694
5695 void
5696 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5697 {
5698         view->highlight_find_results = value;
5699         gtk_widget_queue_draw (GTK_WIDGET (view));
5700 }
5701
5702 void
5703 ev_view_find_cancel (EvView *view)
5704 {
5705         view->find_pages = NULL;
5706 }
5707
5708 /*** Synctex ***/
5709 void
5710 ev_view_highlight_forward_search (EvView       *view,
5711                                   EvSourceLink *link)
5712 {
5713         EvMapping   *mapping;
5714         gint         page;
5715         GdkRectangle view_rect;
5716
5717         if (!ev_document_has_synctex (view->document))
5718                 return;
5719
5720         mapping = ev_document_synctex_forward_search (view->document, link);
5721         if (!mapping)
5722                 return;
5723
5724         if (view->synctex_result)
5725                 g_free (view->synctex_result);
5726         view->synctex_result = mapping;
5727
5728         page = GPOINTER_TO_INT (mapping->data);
5729         ev_document_model_set_page (view->model, page);
5730
5731         doc_rect_to_view_rect (view, page, &mapping->area, &view_rect);
5732         ensure_rectangle_is_visible (view, &view_rect);
5733         gtk_widget_queue_draw (GTK_WIDGET (view));
5734 }
5735
5736 /*** Selections ***/
5737
5738 /* compute_new_selection_rect/text calculates the area currently selected by
5739  * view_rect.  each handles a different mode;
5740  */
5741 static GList *
5742 compute_new_selection_rect (EvView       *view,
5743                             GdkPoint     *start,
5744                             GdkPoint     *stop)
5745 {
5746         GdkRectangle view_rect;
5747         int n_pages, i;
5748         GList *list = NULL;
5749
5750         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5751
5752         view_rect.x = MIN (start->x, stop->x);
5753         view_rect.y = MIN (start->y, stop->y);
5754         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5755         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5756
5757         n_pages = ev_document_get_n_pages (view->document);
5758
5759         for (i = 0; i < n_pages; i++) {
5760                 GdkRectangle page_area;
5761                 GtkBorder border;
5762
5763                 if (ev_view_get_page_extents (view, i, &page_area, &border)) {
5764                         GdkRectangle overlap;
5765
5766                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5767                                 EvViewSelection *selection;
5768
5769                                 selection = g_new0 (EvViewSelection, 1);
5770                                 selection->page = i;
5771                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5772                                                        &(selection->rect));
5773
5774                                 list = g_list_append (list, selection);
5775                         }
5776                 }
5777         }
5778
5779         return list;
5780 }
5781
5782 static gboolean
5783 gdk_rectangle_point_in (GdkRectangle *rectangle,
5784                         GdkPoint     *point)
5785 {
5786         return rectangle->x <= point->x &&
5787                 rectangle->y <= point->y &&
5788                 point->x < rectangle->x + rectangle->width &&
5789                 point->y < rectangle->y + rectangle->height;
5790 }
5791
5792 static GList *
5793 compute_new_selection_text (EvView          *view,
5794                             EvSelectionStyle style,
5795                             GdkPoint        *start,
5796                             GdkPoint        *stop)
5797 {
5798         int n_pages, i, first, last;
5799         GList *list = NULL;
5800         EvViewSelection *selection;
5801         gdouble width, height;
5802         int start_page, end_page;
5803
5804         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5805
5806         n_pages = ev_document_get_n_pages (view->document);
5807
5808         /* First figure out the range of pages the selection
5809          * affects. */
5810         first = n_pages;
5811         last = 0;
5812         if (view->continuous) {
5813                 start_page = 0;
5814                 end_page = n_pages;
5815         } else if (view->dual_page) {
5816                 start_page = view->start_page;
5817                 end_page = view->end_page + 1;
5818         } else {
5819                 start_page = view->current_page;
5820                 end_page = view->current_page + 1;
5821         }
5822
5823         for (i = start_page; i < end_page; i++) {
5824                 GdkRectangle page_area;
5825                 GtkBorder border;
5826
5827                 ev_view_get_page_extents (view, i, &page_area, &border);
5828                 if (gdk_rectangle_point_in (&page_area, start) ||
5829                     gdk_rectangle_point_in (&page_area, stop)) {
5830                         if (first == n_pages)
5831                                 first = i;
5832                         last = i;
5833                 }
5834
5835         }
5836
5837         /* Now create a list of EvViewSelection's for the affected
5838          * pages.  This could be an empty list, a list of just one
5839          * page or a number of pages.*/
5840         for (i = first; i < last + 1; i++) {
5841                 GdkRectangle page_area;
5842                 GtkBorder border;
5843                 GdkPoint *point;
5844
5845                 get_doc_page_size (view, i, &width, &height);
5846
5847                 selection = g_new0 (EvViewSelection, 1);
5848                 selection->page = i;
5849                 selection->style = style;
5850                 selection->rect.x1 = selection->rect.y1 = 0;
5851                 selection->rect.x2 = width;
5852                 selection->rect.y2 = height;
5853
5854                 ev_view_get_page_extents (view, i, &page_area, &border);
5855
5856                 if (gdk_rectangle_point_in (&page_area, start))
5857                         point = start;
5858                 else
5859                         point = stop;
5860
5861                 if (i == first)
5862                         view_point_to_doc_point (view, point, &page_area,
5863                                                  &selection->rect.x1,
5864                                                  &selection->rect.y1);
5865
5866                 /* If the selection is contained within just one page,
5867                  * make sure we don't write 'start' into both points
5868                  * in selection->rect. */
5869                 if (first == last)
5870                         point = stop;
5871
5872                 if (i == last)
5873                         view_point_to_doc_point (view, point, &page_area,
5874                                                  &selection->rect.x2,
5875                                                  &selection->rect.y2);
5876
5877                 list = g_list_append (list, selection);
5878         }
5879
5880         return list;
5881 }
5882
5883 /* This function takes the newly calculated list, and figures out which regions
5884  * have changed.  It then queues a redraw approporiately.
5885  */
5886 static void
5887 merge_selection_region (EvView *view,
5888                         GList  *new_list)
5889 {
5890         GList *old_list;
5891         GList *new_list_ptr, *old_list_ptr;
5892
5893         /* Update the selection */
5894         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5895         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5896         g_list_free (view->selection_info.selections);
5897         view->selection_info.selections = new_list;
5898         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5899         g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
5900
5901         new_list_ptr = new_list;
5902         old_list_ptr = old_list;
5903
5904         while (new_list_ptr || old_list_ptr) {
5905                 EvViewSelection *old_sel, *new_sel;
5906                 int cur_page;
5907                 cairo_region_t *region = NULL;
5908
5909                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5910                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5911
5912                 /* Assume that the lists are in order, and we run through them
5913                  * comparing them, one page at a time.  We come out with the
5914                  * first page we see. */
5915                 if (new_sel && old_sel) {
5916                         if (new_sel->page < old_sel->page) {
5917                                 new_list_ptr = new_list_ptr->next;
5918                                 old_sel = NULL;
5919                         } else if (new_sel->page > old_sel->page) {
5920                                 old_list_ptr = old_list_ptr->next;
5921                                 new_sel = NULL;
5922                         } else {
5923                                 new_list_ptr = new_list_ptr->next;
5924                                 old_list_ptr = old_list_ptr->next;
5925                         }
5926                 } else if (new_sel) {
5927                         new_list_ptr = new_list_ptr->next;
5928                 } else if (old_sel) {
5929                         old_list_ptr = old_list_ptr->next;
5930                 }
5931
5932                 g_assert (new_sel || old_sel);
5933
5934                 /* is the page we're looking at on the screen?*/
5935                 cur_page = new_sel ? new_sel->page : old_sel->page;
5936                 if (cur_page < view->start_page || cur_page > view->end_page)
5937                         continue;
5938
5939                 /* seed the cache with a new page.  We are going to need the new
5940                  * region too. */
5941                 if (new_sel) {
5942                         cairo_region_t *tmp_region = NULL;
5943
5944                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5945                                                                cur_page,
5946                                                                view->scale,
5947                                                                &tmp_region);
5948
5949                         if (tmp_region && !cairo_region_is_empty (tmp_region)) {
5950                                 new_sel->covered_region = cairo_region_reference (tmp_region);
5951                         }
5952                 }
5953
5954                 /* Now we figure out what needs redrawing */
5955                 if (old_sel && new_sel) {
5956                         if (old_sel->covered_region && new_sel->covered_region) {
5957                                 /* We only want to redraw the areas that have
5958                                  * changed, so we xor the old and new regions
5959                                  * and redraw if it's different */
5960                                 region = cairo_region_copy (old_sel->covered_region);
5961 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 9, 12)
5962                                 cairo_region_xor (region, new_sel->covered_region);
5963 #else
5964                                 cairo_region_t *tbr;
5965                                 tbr = cairo_region_copy (new_sel->covered_region);
5966
5967                                 /* xor old_sel, new_sel*/
5968                                 cairo_region_subtract (tbr, region);
5969                                 cairo_region_subtract (region, new_sel->covered_region);
5970                                 cairo_region_union (region, tbr);
5971                                 cairo_region_destroy (tbr);
5972 #endif
5973
5974                                 if (cairo_region_is_empty (region)) {
5975                                         cairo_region_destroy (region);
5976                                         region = NULL;
5977                                 } else {
5978                                         gint num_rectangles = cairo_region_num_rectangles (region);
5979                                         GdkRectangle r;
5980
5981                                         /* We need to make the damage region a little bigger
5982                                          * because the edges of the old selection might change
5983                                          */
5984                                         cairo_region_get_rectangle (region, 0, &r);
5985                                         r.x -= 5;
5986                                         r.width = 5;
5987                                         cairo_region_union_rectangle (region, &r);
5988
5989                                         cairo_region_get_rectangle (region, num_rectangles - 1, &r);
5990                                         r.x += r.width;
5991                                         r.width = 5;
5992                                         cairo_region_union_rectangle (region, &r);
5993                                 }
5994                         } else if (old_sel->covered_region) {
5995                                 region = cairo_region_copy (old_sel->covered_region);
5996                         } else if (new_sel->covered_region) {
5997                                 region = cairo_region_copy (new_sel->covered_region);
5998                         }
5999                 } else if (old_sel && !new_sel) {
6000                         if (old_sel->covered_region && !cairo_region_is_empty (old_sel->covered_region)) {
6001                                 region = cairo_region_copy (old_sel->covered_region);
6002                         }
6003                 } else if (!old_sel && new_sel) {
6004                         if (new_sel->covered_region && !cairo_region_is_empty (new_sel->covered_region)) {
6005                                 region = cairo_region_copy (new_sel->covered_region);
6006                         }
6007                 } else {
6008                         g_assert_not_reached ();
6009                 }
6010
6011                 /* Redraw the damaged region! */
6012                 if (region) {
6013                         GdkWindow   *bin_window;
6014                         GdkRectangle page_area;
6015                         GtkBorder    border;
6016
6017                         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
6018                         ev_view_get_page_extents (view, cur_page, &page_area, &border);
6019                         cairo_region_translate (region,
6020                                            page_area.x + border.left - view->scroll_x,
6021                                            page_area.y + border.top - view->scroll_y);
6022 #if GTK_CHECK_VERSION(2, 90, 5)
6023                         gdk_window_invalidate_region (bin_window, region, TRUE);
6024 #else
6025                 {
6026                         GdkRegion *gdk_region = gdk_region_new ();
6027                         guint      n_recs = cairo_region_num_rectangles (region);
6028                         guint      i;
6029
6030                         for (i = 0; i < n_recs; i++) {
6031                                 cairo_rectangle_int_t rect;
6032
6033                                 cairo_region_get_rectangle (region, i, &rect);
6034                                 gdk_region_union_with_rect (gdk_region, (GdkRectangle *)&rect);
6035                         }
6036                         gdk_window_invalidate_region (bin_window, gdk_region, TRUE);
6037                         gdk_region_destroy (gdk_region);
6038                 }
6039 #endif
6040                         cairo_region_destroy (region);
6041                 }
6042         }
6043
6044         /* Free the old list, now that we're done with it. */
6045         g_list_foreach (old_list, (GFunc) selection_free, NULL);
6046         g_list_free (old_list);
6047 }
6048
6049 static void
6050 compute_selections (EvView          *view,
6051                     EvSelectionStyle style,
6052                     GdkPoint        *start,
6053                     GdkPoint        *stop)
6054 {
6055         GList *list;
6056
6057         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
6058                 list = compute_new_selection_rect (view, start, stop);
6059         else
6060                 list = compute_new_selection_text (view, style, start, stop);
6061         merge_selection_region (view, list);
6062 }
6063
6064 /* Free's the selection.  It's up to the caller to queue redraws if needed.
6065  */
6066 static void
6067 selection_free (EvViewSelection *selection)
6068 {
6069         if (selection->covered_region)
6070                 cairo_region_destroy (selection->covered_region);
6071         g_free (selection);
6072 }
6073
6074 static void
6075 clear_selection (EvView *view)
6076 {
6077         if (view->selection_info.selections) {
6078                 g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6079                 g_list_free (view->selection_info.selections);
6080                 view->selection_info.selections = NULL;
6081
6082                 g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
6083         }
6084         view->selection_info.in_selection = FALSE;
6085         if (view->pixbuf_cache)
6086                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6087 }
6088
6089 void
6090 ev_view_select_all (EvView *view)
6091 {
6092         GList *selections = NULL;
6093         int n_pages, i;
6094
6095         /* Disable selection on rotated pages for the 0.4.0 series */
6096         if (view->rotation != 0)
6097                 return;
6098
6099         clear_selection (view);
6100
6101         n_pages = ev_document_get_n_pages (view->document);
6102         for (i = 0; i < n_pages; i++) {
6103                 gdouble width, height;
6104                 EvViewSelection *selection;
6105
6106                 get_doc_page_size (view, i, &width, &height);
6107
6108                 selection = g_new0 (EvViewSelection, 1);
6109                 selection->page = i;
6110                 selection->style = EV_SELECTION_STYLE_GLYPH;
6111                 selection->rect.x1 = selection->rect.y1 = 0;
6112                 selection->rect.x2 = width;
6113                 selection->rect.y2 = height;
6114
6115                 selections = g_list_append (selections, selection);
6116         }
6117
6118         merge_selection_region (view, selections);
6119         gtk_widget_queue_draw (GTK_WIDGET (view));
6120 }
6121
6122 gboolean
6123 ev_view_get_has_selection (EvView *view)
6124 {
6125         return view->selection_info.selections != NULL;
6126 }
6127
6128 static char *
6129 get_selected_text (EvView *view)
6130 {
6131         GString *text;
6132         GList *l;
6133         gchar *normalized_text;
6134
6135         text = g_string_new (NULL);
6136
6137         ev_document_doc_mutex_lock ();
6138
6139         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6140                 EvViewSelection *selection = (EvViewSelection *)l->data;
6141                 EvPage *page;
6142                 gchar *tmp;
6143
6144                 page = ev_document_get_page (view->document, selection->page);
6145                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6146                                                       page, selection->style,
6147                                                       &(selection->rect));
6148                 g_object_unref (page);
6149                 g_string_append (text, tmp);
6150                 g_free (tmp);
6151         }
6152
6153         ev_document_doc_mutex_unlock ();
6154
6155         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6156         g_string_free (text, TRUE);
6157         return normalized_text;
6158 }
6159
6160 static void
6161 ev_view_clipboard_copy (EvView      *view,
6162                         const gchar *text)
6163 {
6164         GtkClipboard *clipboard;
6165
6166         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6167                                               GDK_SELECTION_CLIPBOARD);
6168         gtk_clipboard_set_text (clipboard, text, -1);
6169 }
6170
6171 void
6172 ev_view_copy (EvView *ev_view)
6173 {
6174         char *text;
6175
6176         if (!EV_IS_SELECTION (ev_view->document))
6177                 return;
6178
6179         text = get_selected_text (ev_view);
6180         ev_view_clipboard_copy (ev_view, text);
6181         g_free (text);
6182 }
6183
6184 static void
6185 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6186                         GtkSelectionData *selection_data,
6187                         guint             info,
6188                         gpointer          data)
6189 {
6190         EvView *ev_view = EV_VIEW (data);
6191
6192         if (ev_view->link_selected) {
6193                 gtk_selection_data_set_text (selection_data,
6194                                              ev_link_action_get_uri (ev_view->link_selected),
6195                                              -1);
6196         } else if (EV_IS_SELECTION (ev_view->document) &&
6197                    ev_view->selection_info.selections) {
6198                 gchar *text;
6199
6200                 text = get_selected_text (ev_view);
6201                 if (text) {
6202                         gtk_selection_data_set_text (selection_data, text, -1);
6203                         g_free (text);
6204                 }
6205         }
6206 }
6207
6208 static void
6209 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6210                           gpointer      data)
6211 {
6212         EvView *view = EV_VIEW (data);
6213
6214         clear_selection (view);
6215         clear_link_selected (view);
6216 }
6217
6218 static void
6219 ev_view_update_primary_selection (EvView *ev_view)
6220 {
6221         GtkClipboard *clipboard;
6222
6223         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6224                                               GDK_SELECTION_PRIMARY);
6225
6226         if (ev_view->selection_info.selections || ev_view->link_selected) {
6227                 GtkTargetList *target_list;
6228                 GtkTargetEntry *targets;
6229                 int n_targets;
6230
6231                 target_list = gtk_target_list_new (NULL, 0);
6232                 gtk_target_list_add_text_targets (target_list, 0);
6233                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6234                 gtk_target_list_unref (target_list);
6235
6236                 if (!gtk_clipboard_set_with_owner (clipboard,
6237                                                    targets, n_targets,
6238                                                    ev_view_primary_get_cb,
6239                                                    ev_view_primary_clear_cb,
6240                                                    G_OBJECT (ev_view)))
6241                         ev_view_primary_clear_cb (clipboard, ev_view);
6242
6243                 gtk_target_table_free (targets, n_targets);
6244         } else {
6245                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6246                         gtk_clipboard_clear (clipboard);
6247         }
6248 }
6249
6250 static void
6251 clear_link_selected (EvView *view)
6252 {
6253         if (view->link_selected) {
6254                 g_object_unref (view->link_selected);
6255                 view->link_selected = NULL;
6256         }
6257 }
6258
6259 void
6260 ev_view_copy_link_address (EvView       *view,
6261                            EvLinkAction *action)
6262 {
6263         clear_link_selected (view);
6264
6265         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6266
6267         view->link_selected = g_object_ref (action);
6268         ev_view_update_primary_selection (view);
6269 }
6270
6271 /*** Cursor operations ***/
6272 static void
6273 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6274 {
6275         GdkCursor *cursor = NULL;
6276         GtkWidget *widget;
6277         GdkWindow *bin_window;
6278
6279         if (view->cursor == new_cursor) {
6280                 return;
6281         }
6282
6283         view->cursor = new_cursor;
6284
6285         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
6286         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6287         cursor = ev_view_cursor_new (gtk_widget_get_display (widget), new_cursor);
6288         gdk_window_set_cursor (bin_window, cursor);
6289         gdk_flush ();
6290         if (cursor)
6291                 gdk_cursor_unref (cursor);
6292 }
6293
6294 void
6295 ev_view_hide_cursor (EvView *view)
6296 {
6297        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6298 }
6299
6300 void
6301 ev_view_show_cursor (EvView *view)
6302 {
6303        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6304 }
6305
6306 gboolean
6307 ev_view_next_page (EvView *view)
6308 {
6309         int page, n_pages;
6310
6311         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6312
6313         if (!view->document)
6314                 return FALSE;
6315
6316         page = ev_document_model_get_page (view->model);
6317         n_pages = ev_document_get_n_pages (view->document);
6318
6319         if (view->dual_page)
6320                 page = page + 2;
6321         else
6322                 page = page + 1;
6323
6324         if (page < n_pages) {
6325                 ev_document_model_set_page (view->model, page);
6326                 return TRUE;
6327         } else if (view->dual_page && page == n_pages) {
6328                 ev_document_model_set_page (view->model, page - 1);
6329                 return TRUE;
6330         } else {
6331                 return FALSE;
6332         }
6333 }
6334
6335 gboolean
6336 ev_view_previous_page (EvView *view)
6337 {
6338         int page;
6339
6340         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6341
6342         if (!view->document)
6343                 return FALSE;
6344
6345         page = ev_document_model_get_page (view->model);
6346
6347         if (view->dual_page)
6348                 page = page - 2;
6349         else
6350                 page = page - 1;
6351
6352         if (page >= 0) {
6353                 ev_document_model_set_page (view->model, page);
6354                 return TRUE;
6355         } else if (view->dual_page && page == -1) {
6356                 ev_document_model_set_page (view->model, 0);
6357                 return TRUE;
6358         } else {
6359                 return FALSE;
6360         }
6361 }
6362