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