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 enum {
  71         PROP_0,
  72         PROP_HADJUSTMENT,
  73         PROP_VADJUSTMENT,
  74         PROP_HSCROLL_POLICY,
  75         PROP_VSCROLL_POLICY
  76 };
  77
  78 static guint signals[N_SIGNALS];
  79
  80 typedef enum {
  81         EV_VIEW_FIND_NEXT,
  82         EV_VIEW_FIND_PREV
  83 } EvViewFindDirection;
  84
  85 #define ZOOM_IN_FACTOR  1.2
  86 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  87
  88 #define SCROLL_TIME 150
  89
  90 /*** Scrolling ***/
  91 static void       view_update_range_and_current_page         (EvView             *view);
  92 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
  93                                                               guint               keyval,
  94                                                               GdkModifierType modifiers,
  95                                                               GtkScrollType       scroll,
  96                                                               gboolean            horizontal);
  97 static void       ensure_rectangle_is_visible                (EvView             *view,
  98                                                               GdkRectangle       *rect);
  99
 100 /*** Geometry computations ***/
 101 static void       compute_border                             (EvView             *view,
 102                                                               int                 width,
 103                                                               int                 height,
 104                                                               GtkBorder          *border);
 105 static void       get_page_y_offset                          (EvView             *view,
 106                                                               int                 page,
 107                                                               int                *y_offset);
 108 static void       view_rect_to_doc_rect                      (EvView             *view,
 109                                                               GdkRectangle       *view_rect,
 110                                                               GdkRectangle       *page_area,
 111                                                               EvRectangle        *doc_rect);
 112 static void       doc_rect_to_view_rect                      (EvView             *view,
 113                                                               int                 page,
 114                                                               EvRectangle        *doc_rect,
 115                                                               GdkRectangle       *view_rect);
 116 static gboolean   get_dual_even_left                         (EvView             *view);
 117 static void       find_page_at_location                      (EvView             *view,
 118                                                               gdouble             x,
 119                                                               gdouble             y,
 120                                                               gint               *page,
 121                                                               gint               *x_offset,
 122                                                               gint               *y_offset);
 123 static void       doc_point_to_view_point                    (EvView             *view,
 124                                                               int                 page,
 125                                                               EvPoint            *doc_point,
 126                                                               GdkPoint           *view_point);
 127 /*** Hyperrefs ***/
 128 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 129                                                               gdouble             x,
 130                                                               gdouble             y);
 131 static char*      tip_from_link                              (EvView             *view,
 132                                                               EvLink             *link);
 133 /*** Forms ***/
 134 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 135                                                                gdouble            x,
 136                                                                gdouble            y);
 137
 138 /*** Annotations ***/
 139 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 140                                                               gdouble             x,
 141                                                               gdouble             y);
 142 static void          show_annotation_windows                 (EvView             *view,
 143                                                               gint                page);
 144 static void          hide_annotation_windows                 (EvView             *view,
 145                                                               gint                page);
 146 /*** GtkWidget implementation ***/
 147 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 148                                                               GtkRequisition     *requisition);
 149 static void       ev_view_size_request_continuous            (EvView             *view,
 150                                                               GtkRequisition     *requisition);
 151 static void       ev_view_size_request_dual_page             (EvView             *view,
 152                                                               GtkRequisition     *requisition);
 153 static void       ev_view_size_request_single_page           (EvView             *view,
 154                                                               GtkRequisition     *requisition);
 155 static void       ev_view_size_request                       (GtkWidget          *widget,
 156                                                               GtkRequisition     *requisition);
 157 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 158                                                               GtkAllocation      *allocation);
 159 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 160                                                               GdkEventScroll     *event);
 161 static gboolean   ev_view_draw                               (GtkWidget          *widget,
 162                                                               cairo_t            *cr);
 163 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 164 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 165                                                               GdkEventButton     *event);
 166 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 167                                                               GdkEventMotion     *event);
 168 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 169                                                               GdkEventButton     *event);
 170 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 171                                                               GdkEventCrossing   *event);
 172 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 173                                                               GdkEventCrossing   *event);
 174 static void       ev_view_style_updated                      (GtkWidget          *widget);
 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_WITH_CODE (EvView, ev_view, GTK_TYPE_FIXED,
 286                          G_IMPLEMENT_INTERFACE (GTK_TYPE_SCROLLABLE, NULL))
 287
 288 /* HeightToPage cache */
 289 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 290
 291 static void
 292 build_height_to_page (EvHeightToPageCache *cache,
 293                       EvDocument          *document,
 294                       gint                 rotation)
 295 {
 296         gboolean swap, uniform, dual_even_left;
 297         int i;
 298         double uniform_height, page_height, next_page_height;
 299         double saved_height;
 300         gdouble u_width, u_height;
 301         gint n_pages;
 302
 303         swap = (rotation == 90 || rotation == 270);
 304
 305         uniform = ev_document_is_page_size_uniform (document);
 306         n_pages = ev_document_get_n_pages (document);
 307         dual_even_left = (n_pages > 2);
 308
 309         g_free (cache->height_to_page);
 310         g_free (cache->dual_height_to_page);
 311
 312         cache->rotation = rotation;
 313         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 314         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 315
 316         if (uniform)
 317                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 318
 319         saved_height = 0;
 320         for (i = 0; i <= n_pages; i++) {
 321                 if (uniform) {
 322                         uniform_height = swap ? u_width : u_height;
 323                         cache->height_to_page[i] = i * uniform_height;
 324                 } else {
 325                         if (i < n_pages) {
 326                                 gdouble w, h;
 327
 328                                 ev_document_get_page_size (document, i, &w, &h);
 329                                 page_height = swap ? w : h;
 330                         } else {
 331                                 page_height = 0;
 332                         }
 333                         cache->height_to_page[i] = saved_height;
 334                         saved_height += page_height;
 335                 }
 336         }
 337
 338         if (dual_even_left && !uniform) {
 339                 gdouble w, h;
 340
 341                 ev_document_get_page_size (document, 0, &w, &h);
 342                 saved_height = swap ? w : h;
 343         } else {
 344                 saved_height = 0;
 345         }
 346
 347         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 348                 if (uniform) {
 349                         uniform_height = swap ? u_width : u_height;
 350                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 351                         if (i + 1 < n_pages + 2)
 352                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 353                 } else {
 354                         if (i + 1 < n_pages) {
 355                                 gdouble w, h;
 356
 357                                 ev_document_get_page_size (document, i + 1, &w, &h);
 358                                 next_page_height = swap ? w : h;
 359                         } else {
 360                                 next_page_height = 0;
 361                         }
 362
 363                         if (i < n_pages) {
 364                                 gdouble w, h;
 365
 366                                 ev_document_get_page_size (document, i, &w, &h);
 367                                 page_height = swap ? w : h;
 368                         } else {
 369                                 page_height = 0;
 370                         }
 371
 372                         if (i + 1 < n_pages + 2) {
 373                                 cache->dual_height_to_page[i] = saved_height;
 374                                 cache->dual_height_to_page[i + 1] = saved_height;
 375                                 saved_height += MAX(page_height, next_page_height);
 376                         } else {
 377                                 cache->dual_height_to_page[i] = saved_height;
 378                         }
 379                 }
 380         }
 381 }
 382
 383 static void
 384 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 385                                     EvDocument          *document,
 386                                     gint                 page,
 387                                     gint                 rotation,
 388                                     gdouble             *height,
 389                                     gdouble             *dual_height)
 390 {
 391         if (cache->rotation != rotation)
 392                 build_height_to_page (cache, document, rotation);
 393
 394         *height = cache->height_to_page[page];
 395         *dual_height = cache->dual_height_to_page[page];
 396 }
 397
 398 static void
 399 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 400 {
 401         if (cache->height_to_page) {
 402                 g_free (cache->height_to_page);
 403                 cache->height_to_page = NULL;
 404         }
 405
 406         if (cache->dual_height_to_page) {
 407                 g_free (cache->dual_height_to_page);
 408                 cache->dual_height_to_page = NULL;
 409         }
 410         g_free (cache);
 411 }
 412
 413 static EvHeightToPageCache *
 414 ev_view_get_height_to_page_cache (EvView *view)
 415 {
 416         EvHeightToPageCache *cache;
 417
 418         if (!view->document)
 419                 return NULL;
 420
 421         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 422         if (!cache) {
 423                 cache = g_new0 (EvHeightToPageCache, 1);
 424                 build_height_to_page (cache, view->document, view->rotation);
 425                 g_object_set_data_full (G_OBJECT (view->document),
 426                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 427                                         cache,
 428                                         (GDestroyNotify)ev_height_to_page_cache_free);
 429         }
 430
 431         return cache;
 432 }
 433
 434 static void
 435 ev_view_get_height_to_page (EvView *view,
 436                             gint    page,
 437                             gint   *height,
 438                             gint   *dual_height)
 439 {
 440         gdouble h, dh;
 441
 442         if (!view->height_to_page_cache)
 443                 return;
 444
 445         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 446                                             view->document,
 447                                             page,
 448                                             view->rotation,
 449                                             &h, &dh);
 450         if (height)
 451                 *height = (gint)(h * view->scale + 0.5);
 452
 453         if (dual_height)
 454                 *dual_height = (gint)(dh * view->scale + 0.5);
 455 }
 456
 457 static gint
 458 ev_view_get_scrollbar_size (EvView        *view,
 459                             GtkOrientation orientation)
 460 {
 461         GtkWidget *widget = GTK_WIDGET (view);
 462         GtkWidget *sb;
 463         GtkWidget *swindow = gtk_widget_get_parent (GTK_WIDGET (view));
 464         GtkAllocation allocation;
 465         GtkRequisition req;
 466         gint spacing;
 467
 468         if (!GTK_IS_SCROLLED_WINDOW (swindow))
 469                 return 0;
 470
 471         gtk_widget_get_allocation (widget, &allocation);
 472
 473         if (orientation == GTK_ORIENTATION_VERTICAL) {
 474                 if (allocation.height >= view->requisition.height)
 475                         sb = gtk_scrolled_window_get_vscrollbar (GTK_SCROLLED_WINDOW (swindow));
 476                 else
 477                         return 0;
 478         } else {
 479                 if (allocation.width >= view->requisition.width)
 480                         sb = gtk_scrolled_window_get_hscrollbar (GTK_SCROLLED_WINDOW (swindow));
 481                 else
 482                         return 0;
 483         }
 484
 485         gtk_widget_style_get (swindow, "scrollbar_spacing", &spacing, NULL);
 486         gtk_widget_get_preferred_size (sb, &req, NULL);
 487
 488         return (orientation == GTK_ORIENTATION_VERTICAL ? req.width : req.height) + spacing;
 489 }
 490
 491 static void
 492 scroll_to_point (EvView        *view,
 493                  gdouble        x,
 494                  gdouble        y,
 495                  GtkOrientation orientation)
 496 {
 497         gdouble page_size;
 498         gdouble upper, lower;
 499
 500         if (orientation == GTK_ORIENTATION_VERTICAL) {
 501                 page_size = gtk_adjustment_get_page_size (view->vadjustment);
 502                 upper = gtk_adjustment_get_upper (view->vadjustment);
 503                 lower = gtk_adjustment_get_lower (view->vadjustment);
 504
 505                 if (view->continuous) {
 506                         gtk_adjustment_clamp_page (view->vadjustment,
 507                                                    y - view->spacing / 2,
 508                                                    y + page_size);
 509                 } else {
 510                         gtk_adjustment_set_value (view->vadjustment,
 511                                                   CLAMP (y, lower, upper - page_size));
 512                 }
 513         } else {
 514                 page_size = gtk_adjustment_get_page_size (view->hadjustment);
 515                 upper = gtk_adjustment_get_upper (view->hadjustment);
 516                 lower = gtk_adjustment_get_lower (view->hadjustment);
 517
 518                 if (view->dual_page) {
 519                         gtk_adjustment_clamp_page (view->hadjustment, x,
 520                                                    x + page_size);
 521                 } else {
 522                         gtk_adjustment_set_value (view->hadjustment,
 523                                                   CLAMP (x, lower, upper - page_size));
 524                 }
 525         }
 526 }
 527
 528 static void
 529 ev_view_scroll_to_page_position (EvView *view, GtkOrientation orientation)
 530 {
 531         gdouble x, y;
 532
 533         if (!view->document)
 534                 return;
 535
 536         if ((orientation == GTK_ORIENTATION_VERTICAL && view->pending_point.y == 0) ||
 537             (orientation == GTK_ORIENTATION_HORIZONTAL && view->pending_point.x == 0)) {
 538                 GdkRectangle page_area;
 539                 GtkBorder    border;
 540
 541                 ev_view_get_page_extents (view, view->current_page, &page_area, &border);
 542                 x = page_area.x;
 543                 y = page_area.y;
 544         } else {
 545                 GdkPoint view_point;
 546
 547                 doc_point_to_view_point (view, view->current_page,
 548                                          &view->pending_point, &view_point);
 549                 x = view_point.x;
 550                 y = view_point.y;
 551         }
 552
 553         scroll_to_point (view, x, y, orientation);
 554 }
 555
 556 static void
 557 ev_view_set_adjustment_values (EvView         *view,
 558                                GtkOrientation  orientation)
 559 {
 560         GtkWidget *widget = GTK_WIDGET (view);
 561         GtkAdjustment *adjustment;
 562         GtkAllocation allocation;
 563         int req_size;
 564         int alloc_size;
 565         gdouble page_size;
 566         gdouble value;
 567         gdouble upper;
 568         double factor;
 569         gint new_value;
 570
 571         gtk_widget_get_allocation (widget, &allocation);
 572
 573         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 574                 req_size = view->requisition.width;
 575                 alloc_size = allocation.width;
 576                 adjustment = view->hadjustment;
 577         } else {
 578                 req_size = view->requisition.height;
 579                 alloc_size = allocation.height;
 580                 adjustment = view->vadjustment;
 581         }
 582
 583         if (!adjustment)
 584                 return;
 585
 586         factor = 1.0;
 587         value = gtk_adjustment_get_value (adjustment);
 588         upper = gtk_adjustment_get_upper (adjustment);
 589         page_size = gtk_adjustment_get_page_size (adjustment);
 590
 591         switch (view->pending_scroll) {
 592                 case SCROLL_TO_KEEP_POSITION:
 593                 case SCROLL_TO_FIND_LOCATION:
 594                         factor = value / upper;
 595                         break;
 596                 case SCROLL_TO_PAGE_POSITION:
 597                         break;
 598                 case SCROLL_TO_CENTER:
 599                         factor = (value + page_size * 0.5) / upper;
 600                         break;
 601         }
 602
 603         upper = MAX (alloc_size, req_size);
 604         page_size = alloc_size;
 605
 606         gtk_adjustment_set_page_size (adjustment, page_size);
 607         gtk_adjustment_set_step_increment (adjustment, alloc_size * 0.1);
 608         gtk_adjustment_set_page_increment (adjustment, alloc_size * 0.9);
 609         gtk_adjustment_set_lower (adjustment, 0);
 610         gtk_adjustment_set_upper (adjustment, upper);
 611
 612         /*
 613          * We add 0.5 to the values before to average out our rounding errors.
 614          */
 615         switch (view->pending_scroll) {
 616                 case SCROLL_TO_KEEP_POSITION:
 617                 case SCROLL_TO_FIND_LOCATION:
 618                         new_value = CLAMP (upper * factor + 0.5, 0, upper - page_size);
 619                         gtk_adjustment_set_value (adjustment, (int)new_value);
 620                         break;
 621                 case SCROLL_TO_PAGE_POSITION:
 622                         ev_view_scroll_to_page_position (view, orientation);
 623                         break;
 624                 case SCROLL_TO_CENTER:
 625                         new_value = CLAMP (upper * factor - page_size * 0.5 + 0.5,
 626                                            0, upper - page_size);
 627                         gtk_adjustment_set_value (adjustment, (int)new_value);
 628                         break;
 629         }
 630
 631         gtk_adjustment_changed (adjustment);
 632 }
 633
 634 static void
 635 view_update_range_and_current_page (EvView *view)
 636 {
 637         gint start = view->start_page;
 638         gint end = view->end_page;
 639
 640         if (ev_document_get_n_pages (view->document) <= 0 ||
 641             !ev_document_check_dimensions (view->document))
 642                 return;
 643
 644         if (view->continuous) {
 645                 GdkRectangle current_area, unused, page_area;
 646                 GtkBorder border;
 647                 gboolean found = FALSE;
 648                 gint area_max = -1, area;
 649                 gint best_current_page = -1;
 650                 int i, j = 0;
 651
 652                 if (!(view->vadjustment && view->hadjustment))
 653                         return;
 654
 655                 current_area.x = gtk_adjustment_get_value (view->hadjustment);
 656                 current_area.width = gtk_adjustment_get_page_size (view->hadjustment);
 657                 current_area.y = gtk_adjustment_get_value (view->vadjustment);
 658                 current_area.height = gtk_adjustment_get_page_size (view->vadjustment);
 659
 660                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 661
 662                         ev_view_get_page_extents (view, i, &page_area, &border);
 663
 664                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 665                                 area = unused.width * unused.height;
 666
 667                                 if (!found) {
 668                                         area_max = area;
 669                                         view->start_page = i;
 670                                         found = TRUE;
 671                                         best_current_page = i;
 672                                 }
 673                                 if (area > area_max) {
 674                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 675                                         area_max = area;
 676                                 }
 677
 678                                 view->end_page = i;
 679                                 j = 0;
 680                         } else if (found && view->current_page <= view->end_page) {
 681                                 if (view->dual_page && j < 1) {
 682                                         /* In dual mode  we stop searching
 683                                          * after two consecutive non-visible pages.
 684                                          */
 685                                         j++;
 686                                         continue;
 687                                 }
 688                                 break;
 689                         }
 690                 }
 691
 692                 if (view->pending_scroll == SCROLL_TO_KEEP_POSITION) {
 693                         best_current_page = MAX (best_current_page, view->start_page);
 694
 695                         if (view->current_page != best_current_page) {
 696                                 view->current_page = best_current_page;
 697                                 hide_loading_window (view);
 698                                 ev_document_model_set_page (view->model, best_current_page);
 699                         }
 700                 }
 701         } else if (view->dual_page) {
 702                 if (view->current_page % 2 == get_dual_even_left (view)) {
 703                         view->start_page = view->current_page;
 704                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 705                                 view->end_page = view->start_page + 1;
 706                         else
 707                                 view->end_page = view->start_page;
 708                 } else {
 709                         if (view->current_page < 1)
 710                                 view->start_page = view->current_page;
 711                         else
 712                                 view->start_page = view->current_page - 1;
 713                         view->end_page = view->current_page;
 714                 }
 715         } else {
 716                 view->start_page = view->current_page;
 717                 view->end_page = view->current_page;
 718         }
 719
 720         if (view->start_page == -1 || view->end_page == -1)
 721                 return;
 722
 723         if (start != view->start_page || end != view->end_page) {
 724                 gint i;
 725
 726                 for (i = start; i < view->start_page && start != -1; i++) {
 727                         hide_annotation_windows (view, i);
 728                 }
 729
 730                 for (i = end; i > view->end_page && end != -1; i--) {
 731                         hide_annotation_windows (view, i);
 732                 }
 733         }
 734
 735         ev_page_cache_set_page_range (view->page_cache,
 736                                       view->start_page,
 737                                       view->end_page);
 738         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 739                                         view->start_page,
 740                                         view->end_page,
 741                                         view->selection_info.selections);
 742
 743         if (ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page))
 744             gtk_widget_queue_draw (GTK_WIDGET (view));
 745 }
 746
 747 static void
 748 ev_view_set_scroll_adjustment (EvView         *view,
 749                                GtkOrientation  orientation,
 750                                GtkAdjustment  *adjustment)
 751 {
 752         GtkAdjustment **to_set;
 753         const gchar    *prop_name;
 754
 755         if (orientation == GTK_ORIENTATION_HORIZONTAL) {
 756                 to_set = &view->hadjustment;
 757                 prop_name = "hadjustment";
 758         } else {
 759                 to_set = &view->vadjustment;
 760                 prop_name = "vadjustment";
 761         }
 762
 763         if (adjustment && adjustment == *to_set)
 764                 return;
 765
 766         if (*to_set) {
 767                 g_signal_handlers_disconnect_by_func (*to_set,
 768                                                       (gpointer) on_adjustment_value_changed,
 769                                                       view);
 770                 g_object_unref (*to_set);
 771         }
 772
 773         if (!adjustment)
 774                 adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
 775         g_signal_connect (adjustment, "value_changed",
 776                           G_CALLBACK (on_adjustment_value_changed),
 777                           view);
 778         *to_set = g_object_ref_sink (adjustment);
 779         ev_view_set_adjustment_values (view, orientation);
 780
 781         g_object_notify (G_OBJECT (view), prop_name);
 782 }
 783
 784 static void
 785 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 786                            guint           keyval,
 787                            GdkModifierType modifiers,
 788                            GtkScrollType   scroll,
 789                            gboolean        horizontal)
 790 {
 791   guint keypad_keyval = keyval - GDK_KEY_Left + GDK_KEY_KP_Left;
 792
 793   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 794                                 "binding_activated", 2,
 795                                 GTK_TYPE_SCROLL_TYPE, scroll,
 796                                 G_TYPE_BOOLEAN, horizontal);
 797   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 798                                 "binding_activated", 2,
 799                                 GTK_TYPE_SCROLL_TYPE, scroll,
 800                                 G_TYPE_BOOLEAN, horizontal);
 801 }
 802
 803 static gdouble
 804 compute_scroll_increment (EvView        *view,
 805                           GtkScrollType  scroll)
 806 {
 807         GtkWidget *widget = GTK_WIDGET (view);
 808         GtkAdjustment *adjustment = view->vadjustment;
 809         cairo_region_t *text_region, *region;
 810         GtkAllocation allocation;
 811         gint page;
 812         GdkRectangle rect;
 813         EvRectangle doc_rect;
 814         GdkRectangle page_area;
 815         GtkBorder border;
 816         gdouble fraction = 1.0;
 817
 818         if (scroll != GTK_SCROLL_PAGE_BACKWARD && scroll != GTK_SCROLL_PAGE_FORWARD)
 819                 return gtk_adjustment_get_page_size (adjustment);
 820
 821         page = scroll == GTK_SCROLL_PAGE_BACKWARD ? view->start_page : view->end_page;
 822
 823         text_region = ev_page_cache_get_text_mapping (view->page_cache, page);
 824         if (!text_region || cairo_region_is_empty (text_region))
 825                 return gtk_adjustment_get_page_size (adjustment);
 826
 827         gtk_widget_get_allocation (widget, &allocation);
 828         ev_view_get_page_extents (view, page, &page_area, &border);
 829         rect.x = page_area.x + view->scroll_x;
 830         rect.y = view->scroll_y + (scroll == GTK_SCROLL_PAGE_BACKWARD ? 5 : allocation.height - 5);
 831         rect.width = page_area.width;
 832         rect.height = 1;
 833         view_rect_to_doc_rect (view, &rect, &page_area, &doc_rect);
 834
 835         /* Convert the doc rectangle into a GdkRectangle */
 836         rect.x = doc_rect.x1;
 837         rect.y = doc_rect.y1;
 838         rect.width = doc_rect.x2 - doc_rect.x1;
 839         rect.height = MAX (1, doc_rect.y2 - doc_rect.y1);
 840         region = cairo_region_create_rectangle (&rect);
 841
 842         cairo_region_intersect (region, text_region);
 843         if (cairo_region_num_rectangles (region)) {
 844                 EvRenderContext *rc;
 845                 EvPage  *ev_page;
 846                 cairo_region_t *sel_region;
 847
 848                 cairo_region_get_rectangle (region, 0, &rect);
 849                 ev_page = ev_document_get_page (view->document, page);
 850                 rc = ev_render_context_new (ev_page, view->rotation, view->scale);
 851                 g_object_unref (ev_page);
 852                 /* Get the selection region to know the height of the line */
 853                 doc_rect.x1 = doc_rect.x2 = rect.x + 0.5;
 854                 doc_rect.y1 = doc_rect.y2 = rect.y + 0.5;
 855
 856                 ev_document_doc_mutex_lock ();
 857                 sel_region = ev_selection_get_selection_region (EV_SELECTION (view->document),
 858                                                                 rc, EV_SELECTION_STYLE_LINE,
 859                                                                 &doc_rect);
 860                 ev_document_doc_mutex_unlock ();
 861
 862                 g_object_unref (rc);
 863
 864                 if (cairo_region_num_rectangles (sel_region) > 0) {
 865                         cairo_region_get_rectangle (sel_region, 0, &rect);
 866                         fraction = 1 - (rect.height / gtk_adjustment_get_page_size (adjustment));
 867                 }
 868                 cairo_region_destroy (sel_region);
 869         }
 870         cairo_region_destroy (region);
 871
 872         return gtk_adjustment_get_page_size (adjustment) * fraction;
 873
 874 }
 875
 876 void
 877 ev_view_scroll (EvView        *view,
 878                 GtkScrollType  scroll,
 879                 gboolean       horizontal)
 880 {
 881         GtkAdjustment *adjustment;
 882         double value, increment;
 883         gdouble upper, lower;
 884         gdouble page_size;
 885         gdouble step_increment;
 886         gboolean first_page = FALSE;
 887         gboolean last_page = FALSE;
 888
 889         view->jump_to_find_result = FALSE;
 890
 891         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
 892                 switch (scroll) {
 893                         case GTK_SCROLL_PAGE_BACKWARD:
 894                         case GTK_SCROLL_STEP_BACKWARD:
 895                                 ev_view_previous_page (view);
 896                                 break;
 897                         case GTK_SCROLL_PAGE_FORWARD:
 898                         case GTK_SCROLL_STEP_FORWARD:
 899                                 ev_view_next_page (view);
 900                                 break;
 901                         default:
 902                                 break;
 903                 }
 904                 return;
 905         }
 906
 907         /* Assign values for increment and vertical adjustment */
 908         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 909         value = gtk_adjustment_get_value (adjustment);
 910         upper = gtk_adjustment_get_upper (adjustment);
 911         lower = gtk_adjustment_get_lower (adjustment);
 912         page_size = gtk_adjustment_get_page_size (adjustment);
 913         step_increment = gtk_adjustment_get_step_increment (adjustment);
 914
 915         /* Assign boolean for first and last page */
 916         if (view->current_page == 0)
 917                 first_page = TRUE;
 918         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 919                 last_page = TRUE;
 920
 921         switch (scroll) {
 922                 case GTK_SCROLL_PAGE_BACKWARD:
 923                         /* Do not jump backwards if at the first page */
 924                         if (value == lower && first_page) {
 925                                 /* Do nothing */
 926                                 /* At the top of a page, assign the upper bound limit of previous page */
 927                         } else if (value == lower) {
 928                                 value = upper - page_size;
 929                                 ev_view_previous_page (view);
 930                                 /* Jump to the top */
 931                         } else {
 932                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_BACKWARD);
 933                                 value = MAX (value - increment, lower);
 934                         }
 935                         break;
 936                 case GTK_SCROLL_PAGE_FORWARD:
 937                         /* Do not jump forward if at the last page */
 938                         if (value == (upper - page_size) && last_page) {
 939                                 /* Do nothing */
 940                         /* At the bottom of a page, assign the lower bound limit of next page */
 941                         } else if (value == (upper - page_size)) {
 942                                 value = 0;
 943                                 ev_view_next_page (view);
 944                         /* Jump to the bottom */
 945                         } else {
 946                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_FORWARD);
 947                                 value = MIN (value + increment, upper - page_size);
 948                         }
 949                         break;
 950                 case GTK_SCROLL_STEP_BACKWARD:
 951                         value -= step_increment;
 952                         break;
 953                 case GTK_SCROLL_STEP_FORWARD:
 954                         value += step_increment;
 955                         break;
 956                 case GTK_SCROLL_STEP_DOWN:
 957                         value -= step_increment / 10;
 958                         break;
 959                 case GTK_SCROLL_STEP_UP:
 960                         value += step_increment / 10;
 961                         break;
 962                 default:
 963                         break;
 964         }
 965
 966         value = CLAMP (value, lower, upper - page_size);
 967
 968         gtk_adjustment_set_value (adjustment, value);
 969 }
 970
 971 #define MARGIN 5
 972
 973 static void
 974 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 975 {
 976         GtkWidget *widget = GTK_WIDGET (view);
 977         GtkAdjustment *adjustment;
 978         GtkAllocation allocation;
 979         gdouble adj_value;
 980         int value;
 981
 982         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 983
 984         gtk_widget_get_allocation (widget, &allocation);
 985
 986         adjustment = view->vadjustment;
 987         adj_value = gtk_adjustment_get_value (adjustment);
 988
 989         if (rect->y < adj_value) {
 990                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->y - MARGIN);
 991                 gtk_adjustment_set_value (view->vadjustment, value);
 992         } else if (rect->y + rect->height > adj_value + allocation.height) {
 993                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->y + rect->height -
 994                              allocation.height + MARGIN);
 995                 gtk_adjustment_set_value (view->vadjustment, value);
 996         }
 997
 998         adjustment = view->hadjustment;
 999         adj_value = gtk_adjustment_get_value (adjustment);
1000
1001         if (rect->x < adj_value) {
1002                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->x - MARGIN);
1003                 gtk_adjustment_set_value (view->hadjustment, value);
1004         } else if (rect->x + rect->height > adj_value + allocation.width) {
1005                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->x + rect->width -
1006                              allocation.width + MARGIN);
1007                 gtk_adjustment_set_value (view->hadjustment, value);
1008         }
1009
1010         gtk_widget_queue_resize (GTK_WIDGET (view));
1011 }
1012
1013 /*** Geometry computations ***/
1014
1015 static void
1016 compute_border (EvView *view, int width, int height, GtkBorder *border)
1017 {
1018         ev_document_misc_get_page_border_size (width, height, border);
1019 }
1020
1021 void
1022 _get_page_size_for_scale_and_rotation (EvDocument *document,
1023                                        gint        page,
1024                                        gdouble     scale,
1025                                        gint        rotation,
1026                                        gint       *page_width,
1027                                        gint       *page_height)
1028 {
1029         gdouble w, h;
1030         gint    width, height;
1031
1032         ev_document_get_page_size (document, page, &w, &h);
1033
1034         width = (gint)(w * scale + 0.5);
1035         height = (gint)(h * scale + 0.5);
1036
1037         if (page_width)
1038                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
1039         if (page_height)
1040                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
1041 }
1042
1043 static void
1044 ev_view_get_page_size (EvView *view,
1045                        gint    page,
1046                        gint   *page_width,
1047                        gint   *page_height)
1048 {
1049         _get_page_size_for_scale_and_rotation (view->document,
1050                                                page,
1051                                                view->scale,
1052                                                view->rotation,
1053                                                page_width,
1054                                                page_height);
1055 }
1056
1057 static void
1058 ev_view_get_max_page_size (EvView *view,
1059                            gint   *max_width,
1060                            gint   *max_height)
1061 {
1062         double w, h;
1063         gint   width, height;
1064
1065         ev_document_get_max_page_size (view->document, &w, &h);
1066
1067         width = (gint)(w * view->scale + 0.5);
1068         height = (gint)(h * view->scale + 0.5);
1069
1070         if (max_width)
1071                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
1072         if (max_height)
1073                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
1074 }
1075
1076 static void
1077 get_page_y_offset (EvView *view, int page, int *y_offset)
1078 {
1079         int max_width, offset;
1080         GtkBorder border;
1081
1082         g_return_if_fail (y_offset != NULL);
1083
1084         ev_view_get_max_page_size (view, &max_width, NULL);
1085         compute_border (view, max_width, max_width, &border);
1086
1087         if (view->dual_page) {
1088                 ev_view_get_height_to_page (view, page, NULL, &offset);
1089                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
1090                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
1091         } else {
1092                 ev_view_get_height_to_page (view, page, &offset, NULL);
1093                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
1094         }
1095
1096         *y_offset = offset;
1097         return;
1098 }
1099
1100 gboolean
1101 ev_view_get_page_extents (EvView       *view,
1102                           gint          page,
1103                           GdkRectangle *page_area,
1104                           GtkBorder    *border)
1105 {
1106         GtkWidget *widget;
1107         int width, height;
1108         GtkAllocation allocation;
1109
1110         widget = GTK_WIDGET (view);
1111         gtk_widget_get_allocation (widget, &allocation);
1112
1113         /* Get the size of the page */
1114         ev_view_get_page_size (view, page, &width, &height);
1115         compute_border (view, width, height, border);
1116         page_area->width = width + border->left + border->right;
1117         page_area->height = height + border->top + border->bottom;
1118
1119         if (view->continuous) {
1120                 gint max_width;
1121                 gint x, y;
1122
1123                 ev_view_get_max_page_size (view, &max_width, NULL);
1124                 max_width = max_width + border->left + border->right;
1125                 /* Get the location of the bounding box */
1126                 if (view->dual_page) {
1127                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1128                         x = x + MAX (0, allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1129                         if (page % 2 == get_dual_even_left (view))
1130                                 x = x + (max_width - width - border->left - border->right);
1131                 } else {
1132                         x = view->spacing;
1133                         x = x + MAX (0, allocation.width - (width + view->spacing * 2)) / 2;
1134                 }
1135
1136                 get_page_y_offset (view, page, &y);
1137
1138                 page_area->x = x;
1139                 page_area->y = y;
1140         } else {
1141                 gint x, y;
1142                 if (view->dual_page) {
1143                         gint width_2, height_2;
1144                         gint max_width = width;
1145                         gint max_height = height;
1146                         GtkBorder overall_border;
1147                         gint other_page;
1148
1149                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1150
1151                         /* First, we get the bounding box of the two pages */
1152                         if (other_page < ev_document_get_n_pages (view->document)
1153                             && (0 <= other_page)) {
1154                                 ev_view_get_page_size (view, other_page,
1155                                                        &width_2, &height_2);
1156                                 if (width_2 > width)
1157                                         max_width = width_2;
1158                                 if (height_2 > height)
1159                                         max_height = height_2;
1160                         }
1161                         compute_border (view, max_width, max_height, &overall_border);
1162
1163                         /* Find the offsets */
1164                         x = view->spacing;
1165                         y = view->spacing;
1166
1167                         /* Adjust for being the left or right page */
1168                         if (page % 2 == get_dual_even_left (view))
1169                                 x = x + max_width - width;
1170                         else
1171                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1172
1173                         y = y + (max_height - height)/2;
1174
1175                         /* Adjust for extra allocation */
1176                         x = x + MAX (0, allocation.width -
1177                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1178                         y = y + MAX (0, allocation.height - (height + view->spacing * 2))/2;
1179                 } else {
1180                         x = view->spacing;
1181                         y = view->spacing;
1182
1183                         /* Adjust for extra allocation */
1184                         x = x + MAX (0, allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1185                         y = y + MAX (0, allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1186                 }
1187
1188                 page_area->x = x;
1189                 page_area->y = y;
1190         }
1191
1192         return TRUE;
1193 }
1194
1195 static void
1196 get_doc_page_size (EvView  *view,
1197                    gint     page,
1198                    gdouble *width,
1199                    gdouble *height)
1200 {
1201         double w, h;
1202
1203         ev_document_get_page_size (view->document, page, &w, &h);
1204         if (view->rotation == 0 || view->rotation == 180) {
1205                 if (width) *width = w;
1206                 if (height) *height = h;
1207         } else {
1208                 if (width) *width = h;
1209                 if (height) *height = w;
1210         }
1211 }
1212
1213 static void
1214 view_point_to_doc_point (EvView *view,
1215                          GdkPoint *view_point,
1216                          GdkRectangle *page_area,
1217                          double  *doc_point_x,
1218                          double  *doc_point_y)
1219 {
1220         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1221         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1222 }
1223
1224 static void
1225 view_rect_to_doc_rect (EvView *view,
1226                        GdkRectangle *view_rect,
1227                        GdkRectangle *page_area,
1228                        EvRectangle  *doc_rect)
1229 {
1230         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1231         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1232         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1233         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1234 }
1235
1236 static void
1237 doc_point_to_view_point (EvView       *view,
1238                          int           page,
1239                          EvPoint      *doc_point,
1240                          GdkPoint     *view_point)
1241 {
1242         GdkRectangle page_area;
1243         GtkBorder border;
1244         double x, y, view_x, view_y;
1245         gdouble width, height;
1246
1247         get_doc_page_size (view, page, &width, &height);
1248
1249         if (view->rotation == 0) {
1250                 x = doc_point->x;
1251                 y = doc_point->y;
1252         } else if (view->rotation == 90) {
1253                 x = width - doc_point->y;
1254                 y = doc_point->x;
1255         } else if (view->rotation == 180) {
1256                 x = width - doc_point->x;
1257                 y = height - doc_point->y;
1258         } else if (view->rotation == 270) {
1259                 x = doc_point->y;
1260                 y = height - doc_point->x;
1261         } else {
1262                 g_assert_not_reached ();
1263         }
1264
1265         ev_view_get_page_extents (view, page, &page_area, &border);
1266
1267         view_x = CLAMP (x * view->scale, 0, page_area.width);
1268         view_y = CLAMP (y * view->scale, 0, page_area.height);
1269         view_point->x = view_x + page_area.x;
1270         view_point->y = view_y + page_area.y;
1271 }
1272
1273 static void
1274 doc_rect_to_view_rect (EvView       *view,
1275                        int           page,
1276                        EvRectangle  *doc_rect,
1277                        GdkRectangle *view_rect)
1278 {
1279         GdkRectangle page_area;
1280         GtkBorder border;
1281         double x, y, w, h;
1282         gdouble width, height;
1283
1284         get_doc_page_size (view, page, &width, &height);
1285
1286         if (view->rotation == 0) {
1287                 x = doc_rect->x1;
1288                 y = doc_rect->y1;
1289                 w = doc_rect->x2 - doc_rect->x1;
1290                 h = doc_rect->y2 - doc_rect->y1;
1291         } else if (view->rotation == 90) {
1292                 x = width - doc_rect->y2;
1293                 y = doc_rect->x1;
1294                 w = doc_rect->y2 - doc_rect->y1;
1295                 h = doc_rect->x2 - doc_rect->x1;
1296         } else if (view->rotation == 180) {
1297                 x = width - doc_rect->x2;
1298                 y = height - doc_rect->y2;
1299                 w = doc_rect->x2 - doc_rect->x1;
1300                 h = doc_rect->y2 - doc_rect->y1;
1301         } else if (view->rotation == 270) {
1302                 x = doc_rect->y1;
1303                 y = height - doc_rect->x2;
1304                 w = doc_rect->y2 - doc_rect->y1;
1305                 h = doc_rect->x2 - doc_rect->x1;
1306         } else {
1307                 g_assert_not_reached ();
1308         }
1309
1310         ev_view_get_page_extents (view, page, &page_area, &border);
1311
1312         view_rect->x = x * view->scale + page_area.x;
1313         view_rect->y = y * view->scale + page_area.y;
1314         view_rect->width = w * view->scale;
1315         view_rect->height = h * view->scale;
1316 }
1317
1318 static gboolean
1319 get_dual_even_left (EvView *view)
1320 {
1321         return (ev_document_get_n_pages (view->document) > 2);
1322 }
1323
1324 static void
1325 find_page_at_location (EvView  *view,
1326                        gdouble  x,
1327                        gdouble  y,
1328                        gint    *page,
1329                        gint    *x_offset,
1330                        gint    *y_offset)
1331 {
1332         int i;
1333
1334         if (view->document == NULL)
1335                 return;
1336
1337         g_assert (page);
1338         g_assert (x_offset);
1339         g_assert (y_offset);
1340
1341         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1342                 GdkRectangle page_area;
1343                 GtkBorder border;
1344
1345                 if (! ev_view_get_page_extents (view, i, &page_area, &border))
1346                         continue;
1347
1348                 if ((x >= page_area.x + border.left) &&
1349                     (x < page_area.x + page_area.width - border.right) &&
1350                     (y >= page_area.y + border.top) &&
1351                     (y < page_area.y + page_area.height - border.bottom)) {
1352                         *page = i;
1353                         *x_offset = x - (page_area.x + border.left);
1354                         *y_offset = y - (page_area.y + border.top);
1355                         return;
1356                 }
1357         }
1358
1359         *page = -1;
1360 }
1361
1362 static gboolean
1363 location_in_text (EvView  *view,
1364                   gdouble  x,
1365                   gdouble  y)
1366 {
1367         cairo_region_t *region;
1368         gint page = -1;
1369         gint x_offset = 0, y_offset = 0;
1370
1371         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1372
1373         if (page == -1)
1374                 return FALSE;
1375
1376         region = ev_page_cache_get_text_mapping (view->page_cache, page);
1377
1378         if (region)
1379                 return cairo_region_contains_point (region, x_offset / view->scale, y_offset / view->scale);
1380         else
1381                 return FALSE;
1382 }
1383
1384 static gboolean
1385 location_in_selected_text (EvView  *view,
1386                            gdouble  x,
1387                            gdouble  y)
1388 {
1389         gint page = -1;
1390         gint x_offset = 0, y_offset = 0;
1391         EvViewSelection *selection;
1392         GList *l = NULL;
1393
1394         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1395                 selection = (EvViewSelection *)l->data;
1396
1397                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1398
1399                 if (page != selection->page)
1400                         continue;
1401
1402                 if (selection->covered_region &&
1403                     cairo_region_contains_point (selection->covered_region, x_offset, y_offset))
1404                         return TRUE;
1405         }
1406
1407         return FALSE;
1408 }
1409
1410 static gboolean
1411 get_doc_point_from_offset (EvView *view,
1412                            gint    page,
1413                            gint    x_offset,
1414                            gint    y_offset,
1415                            gint   *x_new,
1416                            gint   *y_new)
1417 {
1418         gdouble width, height;
1419         double x, y;
1420
1421         get_doc_page_size (view, page, &width, &height);
1422
1423         x_offset = x_offset / view->scale;
1424         y_offset = y_offset / view->scale;
1425
1426         if (view->rotation == 0) {
1427                 x = x_offset;
1428                 y = y_offset;
1429         } else if (view->rotation == 90) {
1430                 x = y_offset;
1431                 y = width - x_offset;
1432         } else if (view->rotation == 180) {
1433                 x = width - x_offset;
1434                 y = height - y_offset;
1435         } else if (view->rotation == 270) {
1436                 x = height - y_offset;
1437                 y = x_offset;
1438         } else {
1439                 g_assert_not_reached ();
1440         }
1441
1442         *x_new = x;
1443         *y_new = y;
1444
1445         return TRUE;
1446 }
1447
1448 static gboolean
1449 get_doc_point_from_location (EvView  *view,
1450                              gdouble  x,
1451                              gdouble  y,
1452                              gint    *page,
1453                              gint    *x_new,
1454                              gint    *y_new)
1455 {
1456         gint x_offset = 0, y_offset = 0;
1457
1458         x += view->scroll_x;
1459         y += view->scroll_y;
1460         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1461         if (*page == -1)
1462                 return FALSE;
1463
1464         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1465 }
1466
1467 static void
1468 ev_view_get_area_from_mapping (EvView        *view,
1469                                guint          page,
1470                                EvMappingList *mapping_list,
1471                                gconstpointer  data,
1472                                GdkRectangle  *area)
1473 {
1474         EvMapping *mapping;
1475
1476         mapping = ev_mapping_list_find (mapping_list, data);
1477         doc_rect_to_view_rect (view, page, &mapping->area, area);
1478         area->x -= view->scroll_x;
1479         area->y -= view->scroll_y;
1480 }
1481
1482
1483 /*** Hyperref ***/
1484 static EvLink *
1485 ev_view_get_link_at_location (EvView  *view,
1486                               gdouble  x,
1487                               gdouble  y)
1488 {
1489         gint page = -1;
1490         gint x_new = 0, y_new = 0;
1491         EvMappingList *link_mapping;
1492
1493         if (!EV_IS_DOCUMENT_LINKS (view->document))
1494                 return NULL;
1495
1496         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1497                 return NULL;
1498
1499         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
1500
1501         if (link_mapping)
1502                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1503         else
1504                 return NULL;
1505 }
1506
1507 static void
1508 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1509 {
1510         EvPoint doc_point;
1511         gdouble zoom, left, top;
1512         gboolean change_left, change_top;
1513         GtkAllocation allocation;
1514
1515         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1516
1517         left = ev_link_dest_get_left (dest, &change_left);
1518         top = ev_link_dest_get_top (dest, &change_top);
1519
1520         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1521                                        ev_link_dest_get_bottom (dest) - top,
1522                                        allocation.width,
1523                                        allocation.height);
1524
1525         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1526         ev_document_model_set_scale (view->model, zoom);
1527
1528         doc_point.x = change_left ? left : 0;
1529         doc_point.y = change_top ? top : 0;
1530         view->pending_point = doc_point;
1531
1532         ev_view_change_page (view, ev_link_dest_get_page (dest));
1533 }
1534
1535 static void
1536 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1537 {
1538         EvPoint doc_point;
1539         gdouble doc_width, doc_height;
1540         gint page;
1541         double zoom, left;
1542         gboolean change_left;
1543         GtkAllocation allocation;
1544
1545         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1546
1547         page = ev_link_dest_get_page (dest);
1548         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1549
1550         left = ev_link_dest_get_left (dest, &change_left);
1551         doc_point.x = change_left ? left : 0;
1552         doc_point.y = 0;
1553
1554         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1555                                          allocation.width,
1556                                          allocation.height);
1557
1558         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1559         ev_document_model_set_scale (view->model, zoom);
1560
1561         view->pending_point = doc_point;
1562
1563         ev_view_change_page (view, page);
1564 }
1565
1566 static void
1567 goto_fith_dest (EvView *view, EvLinkDest *dest)
1568 {
1569         EvPoint doc_point;
1570         gdouble doc_width, doc_height;
1571         gint page;
1572         gdouble zoom, top;
1573         gboolean change_top;
1574         GtkAllocation allocation;
1575
1576         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1577
1578         page = ev_link_dest_get_page (dest);
1579         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1580
1581         top = ev_link_dest_get_top (dest, &change_top);
1582
1583         doc_point.x = 0;
1584         doc_point.y = change_top ? top : 0;
1585
1586         zoom = zoom_for_size_fit_width (doc_width, top,
1587                                         allocation.width,
1588                                         allocation.height);
1589
1590         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1591         ev_document_model_set_scale (view->model, zoom);
1592
1593         view->pending_point = doc_point;
1594
1595         ev_view_change_page (view, page);
1596 }
1597
1598 static void
1599 goto_fit_dest (EvView *view, EvLinkDest *dest)
1600 {
1601         double zoom;
1602         gdouble doc_width, doc_height;
1603         int page;
1604         GtkAllocation allocation;
1605
1606         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1607
1608         page = ev_link_dest_get_page (dest);
1609         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1610
1611         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1612                                        allocation.width,
1613                                        allocation.height);
1614
1615         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1616         ev_document_model_set_scale (view->model, zoom);
1617
1618         ev_view_change_page (view, page);
1619 }
1620
1621 static void
1622 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1623 {
1624         EvPoint doc_point;
1625         gint page;
1626         gdouble zoom, left, top;
1627         gboolean change_zoom, change_left, change_top;
1628
1629         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1630         page = ev_link_dest_get_page (dest);
1631
1632         if (change_zoom && zoom > 1) {
1633                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1634                 ev_document_model_set_scale (view->model, zoom);
1635         }
1636
1637         left = ev_link_dest_get_left (dest, &change_left);
1638         top = ev_link_dest_get_top (dest, &change_top);
1639
1640         doc_point.x = change_left ? left : 0;
1641         doc_point.y = change_top ? top : 0;
1642         view->pending_point = doc_point;
1643
1644         ev_view_change_page (view, page);
1645 }
1646
1647 static void
1648 goto_dest (EvView *view, EvLinkDest *dest)
1649 {
1650         EvLinkDestType type;
1651         int page, n_pages, current_page;
1652
1653         page = ev_link_dest_get_page (dest);
1654         n_pages = ev_document_get_n_pages (view->document);
1655
1656         if (page < 0 || page >= n_pages)
1657                 return;
1658
1659         current_page = view->current_page;
1660
1661         type = ev_link_dest_get_dest_type (dest);
1662
1663         switch (type) {
1664                 case EV_LINK_DEST_TYPE_PAGE:
1665                         ev_document_model_set_page (view->model, page);
1666                         break;
1667                 case EV_LINK_DEST_TYPE_FIT:
1668                         goto_fit_dest (view, dest);
1669                         break;
1670                 case EV_LINK_DEST_TYPE_FITH:
1671                         goto_fith_dest (view, dest);
1672                         break;
1673                 case EV_LINK_DEST_TYPE_FITV:
1674                         goto_fitv_dest (view, dest);
1675                         break;
1676                 case EV_LINK_DEST_TYPE_FITR:
1677                         goto_fitr_dest (view, dest);
1678                         break;
1679                 case EV_LINK_DEST_TYPE_XYZ:
1680                         goto_xyz_dest (view, dest);
1681                         break;
1682                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1683                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1684                         break;
1685                 default:
1686                         g_assert_not_reached ();
1687         }
1688
1689         if (current_page != view->current_page)
1690                 ev_document_model_set_page (view->model, view->current_page);
1691 }
1692
1693 static void
1694 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1695 {
1696         EvLinkDestType type;
1697
1698         type = ev_link_dest_get_dest_type (dest);
1699
1700         if (type == EV_LINK_DEST_TYPE_NAMED) {
1701                 EvLinkDest  *dest2;
1702                 const gchar *named_dest;
1703
1704                 named_dest = ev_link_dest_get_named_dest (dest);
1705                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1706                                                           named_dest);
1707                 if (dest2) {
1708                         goto_dest (view, dest2);
1709                         g_object_unref (dest2);
1710                 }
1711
1712                 return;
1713         }
1714
1715         goto_dest (view, dest);
1716 }
1717
1718 void
1719 ev_view_handle_link (EvView *view, EvLink *link)
1720 {
1721         EvLinkAction    *action = NULL;
1722         EvLinkActionType type;
1723
1724         action = ev_link_get_action (link);
1725         if (!action)
1726                 return;
1727
1728         type = ev_link_action_get_action_type (action);
1729
1730         switch (type) {
1731                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1732                         EvLinkDest *dest;
1733
1734                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1735
1736                         dest = ev_link_action_get_dest (action);
1737                         ev_view_goto_dest (view, dest);
1738                 }
1739                         break;
1740                 case EV_LINK_ACTION_TYPE_LAYERS_STATE: {
1741                         GList            *show, *hide, *toggle;
1742                         GList            *l;
1743                         EvDocumentLayers *document_layers;
1744
1745                         document_layers = EV_DOCUMENT_LAYERS (view->document);
1746
1747                         show = ev_link_action_get_show_list (action);
1748                         for (l = show; l; l = g_list_next (l)) {
1749                                 ev_document_layers_show_layer (document_layers, EV_LAYER (l->data));
1750                         }
1751
1752                         hide = ev_link_action_get_hide_list (action);
1753                         for (l = hide; l; l = g_list_next (l)) {
1754                                 ev_document_layers_hide_layer (document_layers, EV_LAYER (l->data));
1755                         }
1756
1757                         toggle = ev_link_action_get_toggle_list (action);
1758                         for (l = toggle; l; l = g_list_next (l)) {
1759                                 EvLayer *layer = EV_LAYER (l->data);
1760
1761                                 if (ev_document_layers_layer_is_visible (document_layers, layer)) {
1762                                         ev_document_layers_hide_layer (document_layers, layer);
1763                                 } else {
1764                                         ev_document_layers_show_layer (document_layers, layer);
1765                                 }
1766                         }
1767
1768                         g_signal_emit (view, signals[SIGNAL_LAYERS_CHANGED], 0);
1769                         ev_view_reload_page (view, view->current_page, NULL);
1770                 }
1771                         break;
1772                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1773                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1774                 case EV_LINK_ACTION_TYPE_LAUNCH:
1775                 case EV_LINK_ACTION_TYPE_NAMED:
1776                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1777                         break;
1778         }
1779 }
1780
1781 static char *
1782 tip_from_action_named (EvLinkAction *action)
1783 {
1784         const gchar *name = ev_link_action_get_name (action);
1785
1786         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1787                 return g_strdup (_("Go to first page"));
1788         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1789                 return g_strdup (_("Go to previous page"));
1790         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1791                 return g_strdup (_("Go to next page"));
1792         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1793                 return g_strdup (_("Go to last page"));
1794         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1795                 return g_strdup (_("Go to page"));
1796         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1797                 return g_strdup (_("Find"));
1798         }
1799
1800         return NULL;
1801 }
1802
1803 static char *
1804 tip_from_link (EvView *view, EvLink *link)
1805 {
1806         EvLinkAction *action;
1807         EvLinkActionType type;
1808         char *msg = NULL;
1809         char *page_label;
1810         const char *title;
1811
1812         action = ev_link_get_action (link);
1813         title = ev_link_get_title (link);
1814
1815         if (!action)
1816                 return title ? g_strdup (title) : NULL;
1817
1818         type = ev_link_action_get_action_type (action);
1819
1820         switch (type) {
1821                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1822                         page_label = ev_document_links_get_dest_page_label (EV_DOCUMENT_LINKS (view->document),
1823                                                                             ev_link_action_get_dest (action));
1824                         if (page_label) {
1825                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1826                                 g_free (page_label);
1827                         }
1828                         break;
1829                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1830                         if (title) {
1831                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1832                                                        ev_link_action_get_filename (action));
1833                         } else {
1834                                 msg = g_strdup_printf (_("Go to file “%s”"),
1835                                                        ev_link_action_get_filename (action));
1836                         }
1837                         break;
1838                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1839                         msg = g_strdup (ev_link_action_get_uri (action));
1840                         break;
1841                 case EV_LINK_ACTION_TYPE_LAUNCH:
1842                         msg = g_strdup_printf (_("Launch %s"),
1843                                                ev_link_action_get_filename (action));
1844                         break;
1845                 case EV_LINK_ACTION_TYPE_NAMED:
1846                         msg = tip_from_action_named (action);
1847                         break;
1848                 default:
1849                         if (title)
1850                                 msg = g_strdup (title);
1851                         break;
1852         }
1853
1854         return msg;
1855 }
1856
1857 static void
1858 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1859 {
1860         EvLink       *link;
1861         EvFormField  *field;
1862         EvAnnotation *annot = NULL;
1863
1864         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1865                 return;
1866
1867         if (view->adding_annot) {
1868                 if (view->cursor != EV_VIEW_CURSOR_ADD)
1869                         ev_view_set_cursor (view, EV_VIEW_CURSOR_ADD);
1870                 return;
1871         }
1872
1873         if (view->drag_info.in_drag) {
1874                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1875                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1876                 return;
1877         }
1878
1879         if (view->scroll_info.autoscrolling) {
1880                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1881                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1882                 return;
1883         }
1884
1885         link = ev_view_get_link_at_location (view, x, y);
1886         if (link) {
1887                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1888         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1889                 if (field->is_read_only) {
1890                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1891                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1892                             view->cursor == EV_VIEW_CURSOR_DRAG)
1893                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1894                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1895                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1896                 } else {
1897                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1898                 }
1899         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1900                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1901         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1902                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1903         } else {
1904                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1905                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1906                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1907                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL ||
1908                     view->cursor == EV_VIEW_CURSOR_ADD)
1909                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1910         }
1911
1912         if (link || annot)
1913                 g_object_set (view, "has-tooltip", TRUE, NULL);
1914 }
1915
1916 /*** Images ***/
1917 static EvImage *
1918 ev_view_get_image_at_location (EvView  *view,
1919                                gdouble  x,
1920                                gdouble  y)
1921 {
1922         gint page = -1;
1923         gint x_new = 0, y_new = 0;
1924         EvMappingList *image_mapping;
1925
1926         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1927                 return NULL;
1928
1929         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1930                 return NULL;
1931
1932         image_mapping = ev_page_cache_get_image_mapping (view->page_cache, page);
1933
1934         if (image_mapping)
1935                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1936         else
1937                 return NULL;
1938 }
1939
1940 /*** Forms ***/
1941 static EvFormField *
1942 ev_view_get_form_field_at_location (EvView  *view,
1943                                     gdouble  x,
1944                                     gdouble  y)
1945 {
1946         gint page = -1;
1947         gint x_new = 0, y_new = 0;
1948         EvMappingList *forms_mapping;
1949
1950         if (!EV_IS_DOCUMENT_FORMS (view->document))
1951                 return NULL;
1952
1953         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1954                 return NULL;
1955
1956         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache, page);
1957
1958         if (forms_mapping)
1959                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1960         else
1961                 return NULL;
1962 }
1963
1964 static cairo_region_t *
1965 ev_view_form_field_get_region (EvView      *view,
1966                                EvFormField *field)
1967 {
1968         GdkRectangle   view_area;
1969         EvMappingList *forms_mapping;
1970
1971         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
1972                                                               field->page->index);
1973         ev_view_get_area_from_mapping (view, field->page->index,
1974                                        forms_mapping,
1975                                        field, &view_area);
1976
1977         return cairo_region_create_rectangle (&view_area);
1978 }
1979
1980 static gboolean
1981 ev_view_forms_remove_widgets (EvView *view)
1982 {
1983         ev_view_remove_all (view);
1984
1985         return FALSE;
1986 }
1987
1988 static void
1989 ev_view_form_field_destroy (GtkWidget *widget,
1990                             EvView    *view)
1991 {
1992         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1993 }
1994
1995 static GtkWidget *
1996 ev_view_form_field_button_create_widget (EvView      *view,
1997                                          EvFormField *field)
1998 {
1999         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
2000         cairo_region_t    *field_region = NULL;
2001
2002         switch (field_button->type) {
2003                 case EV_FORM_FIELD_BUTTON_PUSH:
2004                         return NULL;
2005                 case EV_FORM_FIELD_BUTTON_CHECK:
2006                 case EV_FORM_FIELD_BUTTON_RADIO: {
2007                         gboolean       state;
2008                         EvMappingList *forms_mapping;
2009                         GList         *l;
2010
2011                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
2012                                                                                field);
2013
2014                         /* FIXME: it actually depends on NoToggleToOff flags */
2015                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
2016                             state && field_button->state)
2017                                 return NULL;
2018
2019                         field_region = ev_view_form_field_get_region (view, field);
2020
2021                         /* For radio buttons and checkbox buttons that are in a set
2022                          * we need to update also the region for the current selected item
2023                          */
2024                         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2025                                                                               field->page->index);
2026                         for (l = ev_mapping_list_get_list (forms_mapping); l; l = g_list_next (l)) {
2027                                 EvFormField *button = ((EvMapping *)(l->data))->data;
2028                                 cairo_region_t *button_region;
2029
2030                                 if (button->id == field->id)
2031                                         continue;
2032
2033                                 /* FIXME: only buttons in the same group should be updated */
2034                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
2035                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
2036                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
2037                                         continue;
2038
2039                                 button_region = ev_view_form_field_get_region (view, button);
2040                                 cairo_region_union (field_region, button_region);
2041                                 cairo_region_destroy (button_region);
2042                         }
2043
2044                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
2045                                                                        field, !state);
2046                         field_button->state = !state;
2047                 }
2048                         break;
2049         }
2050
2051         ev_view_reload_page (view, field->page->index, field_region);
2052         cairo_region_destroy (field_region);
2053
2054         return NULL;
2055 }
2056
2057 static void
2058 ev_view_form_field_text_save (EvView    *view,
2059                               GtkWidget *widget)
2060 {
2061         EvFormField *field;
2062
2063         if (!view->document)
2064                 return;
2065
2066         field = g_object_get_data (G_OBJECT (widget), "form-field");
2067
2068         if (field->changed) {
2069                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2070                 cairo_region_t  *field_region;
2071
2072                 field_region = ev_view_form_field_get_region (view, field);
2073
2074                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
2075                                                             field, field_text->text);
2076                 field->changed = FALSE;
2077                 ev_view_reload_page (view, field->page->index, field_region);
2078                 cairo_region_destroy (field_region);
2079         }
2080 }
2081
2082 static void
2083 ev_view_form_field_text_changed (GtkWidget   *widget,
2084                                  EvFormField *field)
2085 {
2086         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2087         gchar           *text = NULL;
2088
2089         if (GTK_IS_ENTRY (widget)) {
2090                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
2091         } else if (GTK_IS_TEXT_BUFFER (widget)) {
2092                 GtkTextIter start, end;
2093
2094                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
2095                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
2096                                                  &start, &end, FALSE);
2097         }
2098
2099         if (!field_text->text ||
2100             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
2101                 g_free (field_text->text);
2102                 field_text->text = text;
2103                 field->changed = TRUE;
2104         }
2105 }
2106
2107 static GtkWidget *
2108 ev_view_form_field_text_create_widget (EvView      *view,
2109                                        EvFormField *field)
2110 {
2111         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2112         GtkWidget       *text = NULL;
2113         gchar           *txt;
2114
2115         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2116                                                           field);
2117
2118         switch (field_text->type) {
2119                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2120                         /* TODO */
2121                 case EV_FORM_FIELD_TEXT_NORMAL:
2122                         text = gtk_entry_new ();
2123                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2124                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2125                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2126
2127                         if (txt) {
2128                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2129                                 g_free (txt);
2130                         }
2131
2132                         g_signal_connect (text, "changed",
2133                                           G_CALLBACK (ev_view_form_field_text_changed),
2134                                           field);
2135                         g_signal_connect_after (text, "activate",
2136                                                 G_CALLBACK (ev_view_form_field_destroy),
2137                                                 view);
2138                         break;
2139                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2140                         GtkTextBuffer *buffer;
2141
2142                         text = gtk_text_view_new ();
2143                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2144
2145                         if (txt) {
2146                                 gtk_text_buffer_set_text (buffer, txt, -1);
2147                                 g_free (txt);
2148                         }
2149
2150                         g_signal_connect (buffer, "changed",
2151                                           G_CALLBACK (ev_view_form_field_text_changed),
2152                                           field);
2153                 }
2154                         break;
2155         }
2156
2157         g_object_weak_ref (G_OBJECT (text),
2158                            (GWeakNotify)ev_view_form_field_text_save,
2159                            view);
2160
2161         return text;
2162 }
2163
2164 static void
2165 ev_view_form_field_choice_save (EvView    *view,
2166                                 GtkWidget *widget)
2167 {
2168         EvFormField *field;
2169
2170         if (!view->document)
2171                 return;
2172
2173         field = g_object_get_data (G_OBJECT (widget), "form-field");
2174
2175         if (field->changed) {
2176                 GList             *l;
2177                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2178                 cairo_region_t    *field_region;
2179
2180                 field_region = ev_view_form_field_get_region (view, field);
2181
2182                 if (field_choice->is_editable) {
2183                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2184                                                                       field, field_choice->text);
2185                 } else {
2186                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2187                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2188                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2189                                                                                  field,
2190                                                                                  GPOINTER_TO_INT (l->data));
2191                         }
2192                 }
2193                 field->changed = FALSE;
2194                 ev_view_reload_page (view, field->page->index, field_region);
2195                 cairo_region_destroy (field_region);
2196         }
2197 }
2198
2199 static void
2200 ev_view_form_field_choice_changed (GtkWidget   *widget,
2201                                    EvFormField *field)
2202 {
2203         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2204
2205         if (GTK_IS_COMBO_BOX (widget)) {
2206                 gint item;
2207
2208                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2209                 if (!field_choice->selected_items ||
2210                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2211                         g_list_free (field_choice->selected_items);
2212                         field_choice->selected_items = NULL;
2213                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2214                                                                        GINT_TO_POINTER (item));
2215                         field->changed = TRUE;
2216                 }
2217
2218                 if (gtk_combo_box_get_has_entry (GTK_COMBO_BOX (widget))) {
2219                         const gchar *text;
2220
2221                         text = gtk_entry_get_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (widget))));
2222                         if (!field_choice->text ||
2223                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2224                                 g_free (field_choice->text);
2225                                 field_choice->text = g_strdup (text);
2226                                 field->changed = TRUE;
2227                         }
2228                 }
2229         } else if (GTK_IS_TREE_SELECTION (widget)) {
2230                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2231                 GtkTreeModel     *model;
2232                 GList            *items, *l;
2233
2234                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2235                 g_list_free (field_choice->selected_items);
2236                 field_choice->selected_items = NULL;
2237
2238                 for (l = items; l && l->data; l = g_list_next (l)) {
2239                         GtkTreeIter  iter;
2240                         GtkTreePath *path = (GtkTreePath *)l->data;
2241                         gint         item;
2242
2243                         gtk_tree_model_get_iter (model, &iter, path);
2244                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2245
2246                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2247                                                                        GINT_TO_POINTER (item));
2248
2249                         gtk_tree_path_free (path);
2250                 }
2251
2252                 g_list_free (items);
2253
2254                 field->changed = TRUE;
2255         }
2256 }
2257
2258 static GtkWidget *
2259 ev_view_form_field_choice_create_widget (EvView      *view,
2260                                          EvFormField *field)
2261 {
2262         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2263         GtkWidget         *choice;
2264         GtkTreeModel      *model;
2265         gint               n_items, i;
2266         gint               selected_item = 0;
2267
2268         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2269                                                                    field);
2270         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2271         for (i = 0; i < n_items; i++) {
2272                 GtkTreeIter iter;
2273                 gchar      *item;
2274
2275                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2276                                                                      field, i);
2277                 if (ev_document_forms_form_field_choice_is_item_selected (
2278                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2279                         selected_item = i;
2280                         /* FIXME: we need a get_selected_items function in poppler */
2281                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2282                                                                        GINT_TO_POINTER (i));
2283                 }
2284
2285                 if (item) {
2286                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2287                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2288                                             0, item,
2289                                             1, i,
2290                                             -1);
2291                         g_free (item);
2292                 }
2293         }
2294
2295         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2296                 GtkCellRenderer  *renderer;
2297                 GtkWidget        *tree_view;
2298                 GtkTreeSelection *selection;
2299
2300                 tree_view = gtk_tree_view_new_with_model (model);
2301                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2302
2303                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2304                 if (field_choice->multi_select) {
2305                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2306                 }
2307
2308                 /* TODO: set selected items */
2309
2310                 renderer = gtk_cell_renderer_text_new ();
2311                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2312                                                              0,
2313                                                              "choix", renderer,
2314                                                              "text", 0,
2315                                                              NULL);
2316
2317                 choice = gtk_scrolled_window_new (NULL, NULL);
2318                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2319                                                 GTK_POLICY_AUTOMATIC,
2320                                                 GTK_POLICY_AUTOMATIC);
2321                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2322                 gtk_widget_show (tree_view);
2323
2324                 g_signal_connect (selection, "changed",
2325                                   G_CALLBACK (ev_view_form_field_choice_changed),
2326                                   field);
2327                 g_signal_connect_after (selection, "changed",
2328                                         G_CALLBACK (ev_view_form_field_destroy),
2329                                         view);
2330         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2331                 gchar *text;
2332
2333                 /* FIXME once gtk bug 633050 is fixed */
2334                 choice = g_object_new (GTK_TYPE_COMBO_BOX, "has-entry", TRUE, "model", model, NULL);
2335
2336                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2337                 if (text) {
2338                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2339                         g_free (text);
2340                 }
2341
2342                 g_signal_connect (choice, "changed",
2343                                   G_CALLBACK (ev_view_form_field_choice_changed),
2344                                   field);
2345                 g_signal_connect_after (gtk_bin_get_child (GTK_BIN (choice)),
2346                                         "activate",
2347                                         G_CALLBACK (ev_view_form_field_destroy),
2348                                         view);
2349         } else { /* ComboBoxText */
2350                 GtkCellRenderer *renderer;
2351
2352                 choice = gtk_combo_box_new_with_model (model);
2353                 renderer = gtk_cell_renderer_text_new ();
2354                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2355                                             renderer, TRUE);
2356                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2357                                                 renderer,
2358                                                 "text", 0,
2359                                                 NULL);
2360                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2361                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2362
2363                 g_signal_connect (choice, "changed",
2364                                   G_CALLBACK (ev_view_form_field_choice_changed),
2365                                   field);
2366                 g_signal_connect_after (choice, "changed",
2367                                         G_CALLBACK (ev_view_form_field_destroy),
2368                                         view);
2369         }
2370
2371         g_object_unref (model);
2372
2373         g_object_weak_ref (G_OBJECT (choice),
2374                            (GWeakNotify)ev_view_form_field_choice_save,
2375                            view);
2376
2377         return choice;
2378 }
2379
2380 static void
2381 ev_view_handle_form_field (EvView      *view,
2382                            EvFormField *field,
2383                            gdouble      x,
2384                            gdouble      y)
2385 {
2386         GtkWidget     *field_widget = NULL;
2387         EvMappingList *form_field_mapping;
2388         GdkRectangle   view_area;
2389
2390         if (field->is_read_only)
2391                 return;
2392
2393         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2394                 field_widget = ev_view_form_field_button_create_widget (view, field);
2395         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2396                 field_widget = ev_view_form_field_text_create_widget (view, field);
2397         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2398                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2399         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2400                 /* TODO */
2401         }
2402
2403         /* Form field doesn't require a widget */
2404         if (!field_widget)
2405                 return;
2406
2407         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2408                                 g_object_ref (field),
2409                                 (GDestroyNotify)g_object_unref);
2410
2411         form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2412                                                                    field->page->index);
2413         ev_view_get_area_from_mapping (view, field->page->index,
2414                                        form_field_mapping,
2415                                        field, &view_area);
2416
2417         gtk_fixed_put (GTK_FIXED (view), field_widget, view_area.x, view_area.y);
2418         gtk_widget_show (field_widget);
2419         gtk_widget_grab_focus (field_widget);
2420 }
2421
2422 /* Annotations */
2423 static EvViewWindowChild *
2424 ev_view_get_window_child (EvView    *view,
2425                           GtkWidget *window)
2426 {
2427         GList *children = view->window_children;
2428
2429         while (children) {
2430                 EvViewWindowChild *child;
2431
2432                 child = (EvViewWindowChild *)children->data;
2433                 children = children->next;
2434
2435                 if (child->window == window)
2436                         return child;
2437         }
2438
2439         return NULL;
2440 }
2441
2442 static void
2443 ev_view_window_child_move (EvView            *view,
2444                            EvViewWindowChild *child,
2445                            gint               x,
2446                            gint               y)
2447 {
2448         GtkAllocation allocation;
2449         gint          width, height;
2450
2451         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
2452         gtk_window_get_size (GTK_WINDOW (child->window), &width, &height);
2453
2454         child->x = x;
2455         child->y = y;
2456         gtk_window_move (GTK_WINDOW (child->window),
2457                          CLAMP (x, child->parent_x,
2458                                 child->parent_x + allocation.width - width),
2459                          CLAMP (y, child->parent_y,
2460                                 child->parent_y + allocation.height - height));
2461 }
2462
2463 static void
2464 ev_view_window_child_move_with_parent (EvView    *view,
2465                                        GtkWidget *window)
2466 {
2467         EvViewWindowChild *child;
2468         gint               root_x, root_y;
2469
2470         child = ev_view_get_window_child (view, window);
2471         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2472                                &root_x, &root_y);
2473         if (root_x != child->parent_x || root_y != child->parent_y) {
2474                 gint dest_x, dest_y;
2475
2476                 dest_x = child->x + (root_x - child->parent_x);
2477                 dest_y = child->y + (root_y - child->parent_y);
2478                 child->parent_x = root_x;
2479                 child->parent_y = root_y;
2480                 ev_view_window_child_move (view, child, dest_x, dest_y);
2481         }
2482
2483         if (child->visible && !gtk_widget_get_visible (window))
2484                 gtk_widget_show (window);
2485 }
2486
2487 static void
2488 ev_view_window_child_put (EvView    *view,
2489                           GtkWidget *window,
2490                           guint      page,
2491                           gint       x,
2492                           gint       y,
2493                           gdouble    orig_x,
2494                           gdouble    orig_y)
2495 {
2496         EvViewWindowChild *child;
2497         gint               root_x, root_y;
2498
2499         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2500                                &root_x, &root_y);
2501
2502         child = g_new0 (EvViewWindowChild, 1);
2503         child->window = window;
2504         child->page = page;
2505         child->orig_x = orig_x;
2506         child->orig_y = orig_y;
2507         child->parent_x = root_x;
2508         child->parent_y = root_y;
2509         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2510         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2511
2512         if (child->visible)
2513                 gtk_widget_show (window);
2514         else
2515                 gtk_widget_hide (window);
2516
2517         view->window_children = g_list_append (view->window_children, child);
2518 }
2519
2520 static EvViewWindowChild *
2521 ev_view_find_window_child_for_annot (EvView       *view,
2522                                      guint         page,
2523                                      EvAnnotation *annot)
2524 {
2525         GList *children = view->window_children;
2526
2527         while (children) {
2528                 EvViewWindowChild *child;
2529                 EvAnnotation      *wannot;
2530
2531                 child = (EvViewWindowChild *)children->data;
2532                 children = children->next;
2533
2534                 if (child->page != page)
2535                         continue;
2536
2537                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2538                 if (ev_annotation_equal (wannot, annot))
2539                         return child;
2540         }
2541
2542         return NULL;
2543 }
2544
2545 static void
2546 ev_view_window_children_free (EvView *view)
2547 {
2548         GList *l;
2549
2550         if (!view->window_children)
2551                 return;
2552
2553         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2554                 EvViewWindowChild *child;
2555
2556                 child = (EvViewWindowChild *)l->data;
2557                 gtk_widget_destroy (GTK_WIDGET (child->window));
2558                 g_free (child);
2559         }
2560         g_list_free (view->window_children);
2561         view->window_children = NULL;
2562         view->window_child_focus = NULL;
2563 }
2564
2565 static void
2566 annotation_window_grab_focus (GtkWidget *widget,
2567                               EvView    *view)
2568 {
2569         if (view->window_child_focus)
2570                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2571         view->window_child_focus = ev_view_get_window_child (view, widget);
2572 }
2573
2574 static void
2575 annotation_window_closed (EvAnnotationWindow *window,
2576                           EvView             *view)
2577 {
2578         EvViewWindowChild *child;
2579
2580         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2581         child->visible = FALSE;
2582 }
2583
2584 static void
2585 annotation_window_moved (EvAnnotationWindow *window,
2586                          gint                x,
2587                          gint                y,
2588                          EvView             *view)
2589 {
2590         EvViewWindowChild *child;
2591         GdkRectangle       page_area;
2592         GtkBorder          border;
2593         GdkRectangle       view_rect;
2594         EvRectangle        doc_rect;
2595         gint               width, height;
2596
2597         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2598         if (child->x == x && child->y == y)
2599                 return;
2600
2601         child->moved = TRUE;
2602         child->x = x;
2603         child->y = y;
2604
2605         /* Window has been moved by the user,
2606          * we have to set a new origin in doc coords
2607          */
2608         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2609         view_rect.x = (x - child->parent_x) + view->scroll_x;
2610         view_rect.y = (y - child->parent_y) + view->scroll_y;
2611         view_rect.width = width;
2612         view_rect.height = height;
2613
2614         ev_view_get_page_extents (view, child->page, &page_area, &border);
2615         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2616         child->orig_x = doc_rect.x1;
2617         child->orig_y = doc_rect.y1;
2618 }
2619
2620 static void
2621 ev_view_annotation_save_contents (EvView       *view,
2622                                   GParamSpec   *pspec,
2623                                   EvAnnotation *annot)
2624 {
2625         if (!view->document)
2626                 return;
2627
2628         ev_document_doc_mutex_lock ();
2629         ev_document_annotations_save_annotation (EV_DOCUMENT_ANNOTATIONS (view->document),
2630                                                  annot, EV_ANNOTATIONS_SAVE_CONTENTS);
2631         ev_document_doc_mutex_unlock ();
2632 }
2633
2634 static GtkWidget *
2635 ev_view_create_annotation_window (EvView       *view,
2636                                   EvAnnotation *annot,
2637                                   GtkWindow    *parent)
2638 {
2639         GtkWidget   *window;
2640         EvRectangle  doc_rect;
2641         GdkRectangle view_rect;
2642         guint        page;
2643
2644         window = ev_annotation_window_new (annot, parent);
2645         g_signal_connect (window, "grab_focus",
2646                           G_CALLBACK (annotation_window_grab_focus),
2647                           view);
2648         g_signal_connect (window, "closed",
2649                           G_CALLBACK (annotation_window_closed),
2650                           view);
2651         g_signal_connect (window, "moved",
2652                           G_CALLBACK (annotation_window_moved),
2653                           view);
2654         g_signal_connect_swapped (annot, "notify::contents",
2655                                   G_CALLBACK (ev_view_annotation_save_contents),
2656                                   view);
2657         g_object_set_data (G_OBJECT (annot), "popup", window);
2658
2659         page = ev_annotation_get_page_index (annot);
2660         ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window), &doc_rect);
2661         doc_rect_to_view_rect (view, page, &doc_rect, &view_rect);
2662         view_rect.x -= view->scroll_x;
2663         view_rect.y -= view->scroll_y;
2664
2665         ev_view_window_child_put (view, window, page,
2666                                   view_rect.x, view_rect.y,
2667                                   doc_rect.x1, doc_rect.y1);
2668
2669         return window;
2670 }
2671
2672 static void
2673 show_annotation_windows (EvView *view,
2674                          gint    page)
2675 {
2676         EvMappingList *annots;
2677         GList         *l;
2678         GtkWindow     *parent;
2679
2680         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2681
2682         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2683
2684         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2685                 EvAnnotation      *annot;
2686                 EvViewWindowChild *child;
2687                 GtkWidget         *window;
2688
2689                 annot = ((EvMapping *)(l->data))->data;
2690
2691                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2692                         continue;
2693
2694                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2695                         continue;
2696
2697                 window = g_object_get_data (G_OBJECT (annot), "popup");
2698                 if (window) {
2699                         ev_view_window_child_move_with_parent (view, window);
2700                         continue;
2701                 }
2702
2703                 /* Look if we already have a popup for this annot */
2704                 child = ev_view_find_window_child_for_annot (view, page, annot);
2705                 window = child ? child->window : NULL;
2706                 if (window) {
2707                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2708                         g_object_set_data (G_OBJECT (annot), "popup", window);
2709                         ev_view_window_child_move_with_parent (view, window);
2710                 } else {
2711                         ev_view_create_annotation_window (view, annot, parent);
2712                 }
2713         }
2714 }
2715
2716 static void
2717 hide_annotation_windows (EvView *view,
2718                          gint    page)
2719 {
2720         EvMappingList *annots;
2721         GList         *l;
2722
2723         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2724
2725         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2726                 EvAnnotation *annot;
2727                 GtkWidget    *window;
2728
2729                 annot = ((EvMapping *)(l->data))->data;
2730
2731                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2732                         continue;
2733
2734                 window = g_object_get_data (G_OBJECT (annot), "popup");
2735                 if (window)
2736                         gtk_widget_hide (window);
2737         }
2738 }
2739
2740 static EvAnnotation *
2741 ev_view_get_annotation_at_location (EvView  *view,
2742                                     gdouble  x,
2743                                     gdouble  y)
2744 {
2745         gint page = -1;
2746         gint x_new = 0, y_new = 0;
2747         EvMappingList *annotations_mapping;
2748
2749         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2750                 return NULL;
2751
2752         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2753                 return NULL;
2754
2755         annotations_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
2756
2757         if (annotations_mapping)
2758                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2759         else
2760                 return NULL;
2761 }
2762
2763 static void
2764 ev_view_annotation_show_popup_window (EvView    *view,
2765                                       GtkWidget *window)
2766 {
2767         EvViewWindowChild *child;
2768
2769         if (!window)
2770                 return;
2771
2772         child = ev_view_get_window_child (view, window);
2773         if (!child->visible) {
2774                 child->visible = TRUE;
2775                 ev_view_window_child_move (view, child, child->x, child->y);
2776                 gtk_widget_show (window);
2777         }
2778 }
2779
2780 static void
2781 ev_view_handle_annotation (EvView       *view,
2782                            EvAnnotation *annot,
2783                            gdouble       x,
2784                            gdouble       y,
2785                            guint32       timestamp)
2786 {
2787         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2788                 GtkWidget *window;
2789
2790                 window = g_object_get_data (G_OBJECT (annot), "popup");
2791                 ev_view_annotation_show_popup_window (view, window);
2792         }
2793
2794         if (EV_IS_ANNOTATION_ATTACHMENT (annot)) {
2795                 EvAttachment *attachment;
2796
2797                 attachment = ev_annotation_attachment_get_attachment (EV_ANNOTATION_ATTACHMENT (annot));
2798                 if (attachment) {
2799                         GError *error = NULL;
2800
2801                         ev_attachment_open (attachment,
2802                                             gtk_widget_get_screen (GTK_WIDGET (view)),
2803                                             timestamp,
2804                                             &error);
2805
2806                         if (error) {
2807                                 g_warning ("%s", error->message);
2808                                 g_error_free (error);
2809                         }
2810                 }
2811         }
2812 }
2813
2814 static void
2815 ev_view_create_annotation (EvView          *view,
2816                            EvAnnotationType annot_type,
2817                            gint             x,
2818                            gint             y)
2819 {
2820         EvAnnotation   *annot;
2821         GdkPoint        point;
2822         GdkRectangle    page_area;
2823         GtkBorder       border;
2824         EvRectangle     doc_rect, popup_rect;
2825         EvPage         *page;
2826         GdkColor        color = { 0, 65535, 65535, 0 };
2827         GdkRectangle    view_rect;
2828         cairo_region_t *region;
2829
2830         point.x = x;
2831         point.y = y;
2832         ev_view_get_page_extents (view, view->current_page, &page_area, &border);
2833         view_point_to_doc_point (view, &point, &page_area,
2834                                  &doc_rect.x1, &doc_rect.y1);
2835         doc_rect.x2 = doc_rect.x1 + 24;
2836         doc_rect.y2 = doc_rect.y1 + 24;
2837
2838         ev_document_doc_mutex_lock ();
2839         page = ev_document_get_page (view->document, view->current_page);
2840         switch (annot_type) {
2841         case EV_ANNOTATION_TYPE_TEXT:
2842                 annot = ev_annotation_text_new (page);
2843                 break;
2844         case EV_ANNOTATION_TYPE_ATTACHMENT:
2845                 /* TODO */
2846                 g_object_unref (page);
2847                 ev_document_doc_mutex_unlock ();
2848                 return;
2849         default:
2850                 g_assert_not_reached ();
2851         }
2852         g_object_unref (page);
2853
2854         ev_annotation_set_color (annot, &color);
2855
2856         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2857                 popup_rect.x1 = doc_rect.x2;
2858                 popup_rect.x2 = popup_rect.x1 + 200;
2859                 popup_rect.y1 = doc_rect.y2;
2860                 popup_rect.y2 = popup_rect.y1 + 150;
2861                 g_object_set (annot,
2862                               "rectangle", &popup_rect,
2863                               "has_popup", TRUE,
2864                               "popup_is_open", FALSE,
2865                               "label", g_get_real_name (),
2866                               "opacity", 1.0,
2867                               NULL);
2868         }
2869         ev_document_annotations_add_annotation (EV_DOCUMENT_ANNOTATIONS (view->document),
2870                                                 annot, &doc_rect);
2871         ev_document_doc_mutex_unlock ();
2872
2873         /* If the page didn't have annots, mark the cache as dirty */
2874         if (!ev_page_cache_get_annot_mapping (view->page_cache, view->current_page))
2875                 ev_page_cache_mark_dirty (view->page_cache, view->current_page);
2876
2877         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2878                 GtkWindow *parent;
2879                 GtkWidget *window;
2880
2881                 parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2882                 window = ev_view_create_annotation_window (view, annot, parent);
2883
2884                 /* Show the annot window the first time */
2885                 ev_view_annotation_show_popup_window (view, window);
2886         }
2887
2888         doc_rect_to_view_rect (view, view->current_page, &doc_rect, &view_rect);
2889         view_rect.x -= view->scroll_x;
2890         view_rect.y -= view->scroll_y;
2891         region = cairo_region_create_rectangle (&view_rect);
2892         ev_view_reload_page (view, view->current_page, region);
2893         cairo_region_destroy (region);
2894
2895         g_signal_emit (view, signals[SIGNAL_ANNOT_ADDED], 0, annot);
2896 }
2897
2898 void
2899 ev_view_focus_annotation (EvView    *view,
2900                           EvMapping *annot_mapping)
2901 {
2902         GdkRectangle  view_rect;
2903         EvAnnotation *annot;
2904         guint         page;
2905
2906         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2907                 return;
2908
2909         if (view->focus_annotation == annot_mapping)
2910                 return;
2911
2912         view->focus_annotation = annot_mapping;
2913         annot = (EvAnnotation *)annot_mapping->data;
2914
2915         page = ev_annotation_get_page_index (annot);
2916         ev_document_model_set_page (view->model, page);
2917
2918         doc_rect_to_view_rect (view, page,
2919                                &annot_mapping->area, &view_rect);
2920         ensure_rectangle_is_visible (view, &view_rect);
2921         gtk_widget_queue_draw (GTK_WIDGET (view));
2922 }
2923
2924 void
2925 ev_view_begin_add_annotation (EvView          *view,
2926                               EvAnnotationType annot_type)
2927 {
2928         if (annot_type == EV_ANNOTATION_TYPE_UNKNOWN)
2929                 return;
2930
2931         if (view->adding_annot)
2932                 return;
2933
2934         view->adding_annot = TRUE;
2935         view->adding_annot_type = annot_type;
2936         ev_view_set_cursor (view, EV_VIEW_CURSOR_ADD);
2937 }
2938
2939 void
2940 ev_view_cancel_add_annotation (EvView *view)
2941 {
2942         gint x, y;
2943
2944         if (!view->adding_annot)
2945                 return;
2946
2947         view->adding_annot = FALSE;
2948         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
2949         ev_view_handle_cursor_over_xy (view, x, y);
2950 }
2951
2952 static gboolean
2953 ev_view_synctex_backward_search (EvView *view,
2954                                  gdouble x,
2955                                  gdouble y)
2956 {
2957         gint page = -1;
2958         gint x_new = 0, y_new = 0;
2959         EvSourceLink *link;
2960
2961         if (!ev_document_has_synctex (view->document))
2962                 return FALSE;
2963
2964         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2965                 return FALSE;
2966
2967         link = ev_document_synctex_backward_search (view->document, page, x_new, y_new);
2968         if (link) {
2969                 g_signal_emit (view, signals[SIGNAL_SYNC_SOURCE], 0, link);
2970                 g_free (link);
2971
2972                 return TRUE;
2973         }
2974
2975         return FALSE;
2976 }
2977
2978 /*** GtkWidget implementation ***/
2979
2980 static void
2981 ev_view_size_request_continuous_dual_page (EvView         *view,
2982                                            GtkRequisition *requisition)
2983 {
2984         gint n_pages;
2985
2986         n_pages = ev_document_get_n_pages (view->document) + 1;
2987         get_page_y_offset (view, n_pages, &requisition->height);
2988
2989         switch (view->sizing_mode) {
2990                 case EV_SIZING_FIT_WIDTH:
2991                 case EV_SIZING_BEST_FIT:
2992                         requisition->width = 1;
2993
2994                         break;
2995                 case EV_SIZING_FREE: {
2996                         gint max_width;
2997                         GtkBorder border;
2998
2999                         ev_view_get_max_page_size (view, &max_width, NULL);
3000                         compute_border (view, max_width, max_width, &border);
3001                         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
3002                 }
3003                         break;
3004                 default:
3005                         g_assert_not_reached ();
3006         }
3007 }
3008
3009 static void
3010 ev_view_size_request_continuous (EvView         *view,
3011                                  GtkRequisition *requisition)
3012 {
3013         gint n_pages;
3014
3015         n_pages = ev_document_get_n_pages (view->document);
3016         get_page_y_offset (view, n_pages, &requisition->height);
3017
3018         switch (view->sizing_mode) {
3019                 case EV_SIZING_FIT_WIDTH:
3020                 case EV_SIZING_BEST_FIT:
3021                         requisition->width = 1;
3022
3023                         break;
3024                 case EV_SIZING_FREE: {
3025                         gint max_width;
3026                         GtkBorder border;
3027
3028                         ev_view_get_max_page_size (view, &max_width, NULL);
3029                         compute_border (view, max_width, max_width, &border);
3030                         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
3031                 }
3032                         break;
3033                 default:
3034                         g_assert_not_reached ();
3035         }
3036 }
3037
3038 static void
3039 ev_view_size_request_dual_page (EvView         *view,
3040                                 GtkRequisition *requisition)
3041 {
3042         GtkBorder border;
3043         gint width, height;
3044
3045         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
3046                 requisition->width = 1;
3047                 requisition->height = 1;
3048
3049                 return;
3050         }
3051
3052         /* Find the largest of the two. */
3053         ev_view_get_page_size (view,
3054                                view->current_page,
3055                                &width, &height);
3056         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
3057                 gint width_2, height_2;
3058                 ev_view_get_page_size (view,
3059                                        view->current_page + 1,
3060                                        &width_2, &height_2);
3061                 if (width_2 > width) {
3062                         width = width_2;
3063                         height = height_2;
3064                 }
3065         }
3066         compute_border (view, width, height, &border);
3067
3068         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
3069                 ((width + border.left + border.right) * 2) + (view->spacing * 3);
3070         requisition->height = (height + border.top + border.bottom) + (view->spacing * 2);
3071 }
3072
3073 static void
3074 ev_view_size_request_single_page (EvView         *view,
3075                                   GtkRequisition *requisition)
3076 {
3077         GtkBorder border;
3078         gint width, height;
3079
3080         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
3081                 requisition->width = 1;
3082                 requisition->height = 1;
3083
3084                 return;
3085         }
3086
3087         ev_view_get_page_size (view, view->current_page, &width, &height);
3088         compute_border (view, width, height, &border);
3089
3090         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
3091                 width + border.left + border.right + (2 * view->spacing);
3092         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
3093 }
3094
3095 static void
3096 ev_view_size_request (GtkWidget      *widget,
3097                       GtkRequisition *requisition)
3098 {
3099         EvView *view = EV_VIEW (widget);
3100
3101         if (view->document == NULL) {
3102                 view->requisition.width = 1;
3103                 view->requisition.height = 1;
3104
3105                 *requisition = view->requisition;
3106
3107                 return;
3108         }
3109
3110         /* Get zoom for size here when not called from
3111          * ev_view_size_allocate()
3112          */
3113         if (!view->internal_size_request &&
3114             (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3115              view->sizing_mode == EV_SIZING_BEST_FIT)) {
3116                 GtkAllocation allocation;
3117
3118                 gtk_widget_get_allocation (widget, &allocation);
3119                 ev_view_zoom_for_size (view,
3120                                        allocation.width,
3121                                        allocation.height);
3122         }
3123
3124         if (view->continuous && view->dual_page)
3125                 ev_view_size_request_continuous_dual_page (view, &view->requisition);
3126         else if (view->continuous)
3127                 ev_view_size_request_continuous (view, &view->requisition);
3128         else if (view->dual_page)
3129                 ev_view_size_request_dual_page (view, &view->requisition);
3130         else
3131                 ev_view_size_request_single_page (view, &view->requisition);
3132
3133         *requisition = view->requisition;
3134 }
3135
3136 static void
3137 ev_view_get_preferred_width (GtkWidget *widget,
3138                              gint      *minimum,
3139                              gint      *natural)
3140 {
3141         GtkRequisition requisition;
3142
3143         ev_view_size_request (widget, &requisition);
3144
3145         *minimum = *natural = requisition.width;
3146 }
3147
3148 static void
3149 ev_view_get_preferred_height (GtkWidget *widget,
3150                               gint      *minimum,
3151                               gint      *natural)
3152 {
3153         GtkRequisition requisition;
3154
3155         ev_view_size_request (widget, &requisition);
3156
3157         *minimum = *natural = requisition.height;
3158 }
3159
3160 static void
3161 ev_view_size_allocate (GtkWidget      *widget,
3162                        GtkAllocation  *allocation)
3163 {
3164         EvView *view = EV_VIEW (widget);
3165         GList  *children, *l;
3166         gint    root_x, root_y;
3167
3168         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
3169
3170         if (!view->document)
3171                 return;
3172
3173         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3174             view->sizing_mode == EV_SIZING_BEST_FIT) {
3175                 GtkRequisition req;
3176
3177                 ev_view_zoom_for_size (view,
3178                                        allocation->width,
3179                                        allocation->height);
3180                 view->internal_size_request = TRUE;
3181                 ev_view_size_request (widget, &req);
3182                 view->internal_size_request = FALSE;
3183         }
3184
3185         ev_view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
3186         ev_view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
3187
3188         if (view->document)
3189                 view_update_range_and_current_page (view);
3190
3191         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
3192         view->pending_resize = FALSE;
3193         view->pending_point.x = 0;
3194         view->pending_point.y = 0;
3195
3196         children = gtk_container_get_children (GTK_CONTAINER (widget));
3197         for (l = children; l && l->data; l = g_list_next (l)) {
3198                 EvFormField   *field;
3199                 GdkRectangle   view_area;
3200                 EvMappingList *form_field_mapping;
3201                 GtkAllocation  child_allocation;
3202                 GtkRequisition child_requisition;
3203                 GtkWidget     *child = (GtkWidget *)l->data;
3204
3205                 field = g_object_get_data (G_OBJECT (child), "form-field");
3206                 if (!field)
3207                         continue;
3208
3209                 form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
3210                                                                            field->page->index);
3211                 ev_view_get_area_from_mapping (view, field->page->index,
3212                                                form_field_mapping,
3213                                                field, &view_area);
3214
3215                 gtk_widget_get_preferred_size (child, &child_requisition, NULL);
3216                 if (child_requisition.width != view_area.width ||
3217                     child_requisition.height != view_area.height)
3218                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
3219
3220                 gtk_container_child_get (GTK_CONTAINER (widget),
3221                                          child,
3222                                          "x", &child_allocation.x,
3223                                          "y", &child_allocation.y,
3224                                          NULL);
3225                 if (child_allocation.x != view_area.x ||
3226                     child_allocation.y != view_area.y) {
3227                         gtk_fixed_move (GTK_FIXED (widget), child, view_area.x, view_area.y);
3228                 }
3229         }
3230         g_list_free (children);
3231
3232         if (view->window_children)
3233                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
3234                                        &root_x, &root_y);
3235
3236         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
3237                 EvViewWindowChild *child;
3238                 EvRectangle        doc_rect;
3239                 GdkRectangle       view_rect;
3240
3241                 child = (EvViewWindowChild *)l->data;
3242
3243                 ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window), &doc_rect);
3244                 if (child->moved) {
3245                         doc_rect.x1 = child->orig_x;
3246                         doc_rect.y1 = child->orig_y;
3247                 }
3248                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
3249                 view_rect.x -= view->scroll_x;
3250                 view_rect.y -= view->scroll_y;
3251
3252                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
3253                         child->parent_x = root_x;
3254                         child->parent_y = root_y;
3255                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
3256                 }
3257         }
3258 }
3259
3260 static gboolean
3261 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
3262 {
3263         EvView *view = EV_VIEW (widget);
3264         guint state;
3265
3266         state = event->state & gtk_accelerator_get_default_mod_mask ();
3267
3268         if (state == GDK_CONTROL_MASK) {
3269                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
3270                 if (event->direction == GDK_SCROLL_UP ||
3271                     event->direction == GDK_SCROLL_LEFT) {
3272                         if (ev_view_can_zoom_in (view)) {
3273                                 ev_view_zoom_in (view);
3274                         }
3275                 } else {
3276                         if (ev_view_can_zoom_out (view)) {
3277                                 ev_view_zoom_out (view);
3278                         }
3279                 }
3280
3281                 return TRUE;
3282         }
3283
3284         view->jump_to_find_result = FALSE;
3285
3286         /* Shift+Wheel scrolls the in the perpendicular direction */
3287         if (state & GDK_SHIFT_MASK) {
3288                 if (event->direction == GDK_SCROLL_UP)
3289                         event->direction = GDK_SCROLL_LEFT;
3290                 else if (event->direction == GDK_SCROLL_LEFT)
3291                         event->direction = GDK_SCROLL_UP;
3292                 else if (event->direction == GDK_SCROLL_DOWN)
3293                         event->direction = GDK_SCROLL_RIGHT;
3294                 else if (event->direction == GDK_SCROLL_RIGHT)
3295                         event->direction = GDK_SCROLL_DOWN;
3296
3297                 event->state &= ~GDK_SHIFT_MASK;
3298                 state &= ~GDK_SHIFT_MASK;
3299         }
3300
3301         if (state == 0 && view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous) {
3302                 switch (event->direction) {
3303                         case GDK_SCROLL_DOWN:
3304                         case GDK_SCROLL_RIGHT:
3305                                 ev_view_next_page (view);
3306                                 break;
3307                         case GDK_SCROLL_UP:
3308                         case GDK_SCROLL_LEFT:
3309                                 ev_view_previous_page (view);
3310                                 break;
3311                 }
3312
3313                 return TRUE;
3314         }
3315
3316         return FALSE;
3317 }
3318
3319 static EvViewSelection *
3320 find_selection_for_page (EvView *view,
3321                          gint    page)
3322 {
3323         GList *list;
3324
3325         for (list = view->selection_info.selections; list != NULL; list = list->next) {
3326                 EvViewSelection *selection;
3327
3328                 selection = (EvViewSelection *) list->data;
3329
3330                 if (selection->page == page)
3331                         return selection;
3332         }
3333
3334         return NULL;
3335 }
3336
3337 static gboolean
3338 ev_view_draw (GtkWidget *widget,
3339               cairo_t   *cr)
3340 {
3341         EvView      *view = EV_VIEW (widget);
3342         gint         i;
3343         GdkRectangle clip_rect;
3344
3345         if (view->loading) {
3346                 show_loading_window (view);
3347         } else if (view->loading_window &&
3348                    gtk_widget_get_visible (view->loading_window)) {
3349                 ev_view_loading_window_move (view);
3350         }
3351
3352         if (view->document == NULL)
3353                 return FALSE;
3354
3355         if (!gdk_cairo_get_clip_rectangle (cr, &clip_rect))
3356                 return FALSE;
3357
3358         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3359                 GdkRectangle page_area;
3360                 GtkBorder border;
3361                 gboolean page_ready = TRUE;
3362
3363                 if (!ev_view_get_page_extents (view, i, &page_area, &border))
3364                         continue;
3365
3366                 page_area.x -= view->scroll_x;
3367                 page_area.y -= view->scroll_y;
3368
3369                 draw_one_page (view, i, cr, &page_area, &border, &clip_rect, &page_ready);
3370
3371                 if (page_ready && view->find_pages && view->highlight_find_results)
3372                         highlight_find_results (view, cr, i);
3373                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3374                         show_annotation_windows (view, i);
3375                 if (page_ready && view->focus_annotation)
3376                         focus_annotation (view, cr, i, &clip_rect);
3377                 if (page_ready && view->synctex_result)
3378                         highlight_forward_search_results (view, cr, i);
3379         }
3380
3381         if (GTK_WIDGET_CLASS (ev_view_parent_class)->draw)
3382                 GTK_WIDGET_CLASS (ev_view_parent_class)->draw (widget, cr);
3383
3384         return FALSE;
3385 }
3386
3387 static gboolean
3388 ev_view_do_popup_menu (EvView *view,
3389                        gdouble x,
3390                        gdouble y)
3391 {
3392         GList        *items = NULL;
3393         EvLink       *link;
3394         EvImage      *image;
3395         EvAnnotation *annot;
3396
3397         image = ev_view_get_image_at_location (view, x, y);
3398         if (image)
3399                 items = g_list_prepend (items, image);
3400
3401         link = ev_view_get_link_at_location (view, x, y);
3402         if (link)
3403                 items = g_list_prepend (items, link);
3404
3405         annot = ev_view_get_annotation_at_location (view, x, y);
3406         if (annot)
3407                 items = g_list_prepend (items, annot);
3408
3409         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, items);
3410
3411         g_list_free (items);
3412
3413         return TRUE;
3414 }
3415
3416 static gboolean
3417 ev_view_popup_menu (GtkWidget *widget)
3418 {
3419         gint x, y;
3420
3421         gtk_widget_get_pointer (widget, &x, &y);
3422         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3423 }
3424
3425 static void
3426 get_link_area (EvView       *view,
3427                gint          x,
3428                gint          y,
3429                EvLink       *link,
3430                GdkRectangle *area)
3431 {
3432         EvMappingList *link_mapping;
3433         gint           page;
3434         gint           x_offset = 0, y_offset = 0;
3435
3436         x += view->scroll_x;
3437         y += view->scroll_y;
3438
3439         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3440
3441         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
3442         ev_view_get_area_from_mapping (view, page,
3443                                        link_mapping,
3444                                        link, area);
3445 }
3446
3447 static void
3448 get_annot_area (EvView       *view,
3449                gint          x,
3450                gint          y,
3451                EvAnnotation *annot,
3452                GdkRectangle *area)
3453 {
3454         EvMappingList *annot_mapping;
3455         gint           page;
3456         gint           x_offset = 0, y_offset = 0;
3457
3458         x += view->scroll_x;
3459         y += view->scroll_y;
3460
3461         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3462
3463         annot_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
3464         ev_view_get_area_from_mapping (view, page,
3465                                        annot_mapping,
3466                                        annot, area);
3467 }
3468
3469 static gboolean
3470 ev_view_query_tooltip (GtkWidget  *widget,
3471                        gint        x,
3472                        gint        y,
3473                        gboolean    keyboard_tip,
3474                        GtkTooltip *tooltip)
3475 {
3476         EvView       *view = EV_VIEW (widget);
3477         EvLink       *link;
3478         EvAnnotation *annot;
3479         gchar        *text;
3480
3481         annot = ev_view_get_annotation_at_location (view, x, y);
3482         if (annot) {
3483                 const gchar *contents;
3484
3485                 if ((contents = ev_annotation_get_contents (annot))) {
3486                         GdkRectangle annot_area;
3487
3488                         get_annot_area (view, x, y, annot, &annot_area);
3489                         gtk_tooltip_set_text (tooltip, contents);
3490                         gtk_tooltip_set_tip_area (tooltip, &annot_area);
3491
3492                         return TRUE;
3493                 }
3494         }
3495
3496         link = ev_view_get_link_at_location (view, x, y);
3497         if (!link)
3498                 return FALSE;
3499
3500         text = tip_from_link (view, link);
3501         if (text && g_utf8_validate (text, -1, NULL)) {
3502                 GdkRectangle link_area;
3503
3504                 get_link_area (view, x, y, link, &link_area);
3505                 gtk_tooltip_set_text (tooltip, text);
3506                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3507                 g_free (text);
3508
3509                 return TRUE;
3510         }
3511         g_free (text);
3512
3513         return FALSE;
3514 }
3515
3516 static void
3517 start_selection_for_event (EvView         *view,
3518                            GdkEventButton *event)
3519 {
3520         clear_selection (view);
3521
3522         view->selection_info.start.x = event->x + view->scroll_x;
3523         view->selection_info.start.y = event->y + view->scroll_y;
3524
3525         switch (event->type) {
3526                 case GDK_2BUTTON_PRESS:
3527                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3528                         break;
3529                 case GDK_3BUTTON_PRESS:
3530                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3531                         break;
3532                 default:
3533                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3534                         return;
3535         }
3536
3537         /* In case of WORD or LINE, compute selections now */
3538         compute_selections (view,
3539                             view->selection_info.style,
3540                             &(view->selection_info.start),
3541                             &(view->selection_info.start));
3542 }
3543
3544 static gboolean
3545 ev_view_button_press_event (GtkWidget      *widget,
3546                             GdkEventButton *event)
3547 {
3548         EvView *view = EV_VIEW (widget);
3549
3550         if (!view->document)
3551                 return FALSE;
3552
3553         if (!gtk_widget_has_focus (widget)) {
3554                 gtk_widget_grab_focus (widget);
3555         }
3556
3557         if (view->window_child_focus) {
3558                 EvAnnotationWindow *window;
3559                 EvAnnotation       *annot;
3560
3561                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3562                 annot = ev_annotation_window_get_annotation (window);
3563                 ev_annotation_window_ungrab_focus (window);
3564                 view->window_child_focus = NULL;
3565         }
3566
3567         view->pressed_button = event->button;
3568         view->selection_info.in_drag = FALSE;
3569
3570         if (view->adding_annot)
3571                 return FALSE;
3572
3573         if (view->scroll_info.autoscrolling)
3574                 return TRUE;
3575
3576         switch (event->button) {
3577                 case 1: {
3578                         EvImage *image;
3579                         EvAnnotation *annot;
3580                         EvFormField *field;
3581
3582                         if (event->state & GDK_CONTROL_MASK)
3583                                 return ev_view_synctex_backward_search (view, event->x , event->y);
3584
3585                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3586                                 if (event->type == GDK_3BUTTON_PRESS) {
3587                                         start_selection_for_event (view, event);
3588                                 } else if (location_in_selected_text (view,
3589                                                                event->x + view->scroll_x,
3590                                                                event->y + view->scroll_y)) {
3591                                         view->selection_info.in_drag = TRUE;
3592                                 } else {
3593                                         start_selection_for_event (view, event);
3594                                 }
3595
3596                                 gtk_widget_queue_draw (widget);
3597                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3598                                 ev_view_handle_annotation (view, annot, event->x, event->y, event->time);
3599                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3600                                 ev_view_remove_all (view);
3601                                 ev_view_handle_form_field (view, field, event->x, event->y);
3602                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3603                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3604                                 if (view->image_dnd_info.image)
3605                                         g_object_unref (view->image_dnd_info.image);
3606                                 view->image_dnd_info.image = g_object_ref (image);
3607                                 view->image_dnd_info.in_drag = TRUE;
3608
3609                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3610                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3611                         } else {
3612                                 ev_view_remove_all (view);
3613
3614                                 if (view->synctex_result) {
3615                                         g_free (view->synctex_result);
3616                                         view->synctex_result = NULL;
3617                                         gtk_widget_queue_draw (widget);
3618                                 }
3619
3620                                 if (view->focus_annotation)
3621                                         view->focus_annotation = NULL;
3622
3623                                 if (EV_IS_SELECTION (view->document))
3624                                         start_selection_for_event (view, event);
3625                         }
3626                 }
3627                         return TRUE;
3628                 case 2:
3629                         /* use root coordinates as reference point because
3630                          * scrolling changes window relative coordinates */
3631                         view->drag_info.start.x = event->x_root;
3632                         view->drag_info.start.y = event->y_root;
3633                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3634                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3635
3636                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3637
3638                         return TRUE;
3639                 case 3:
3640                         view->scroll_info.start_y = event->y;
3641                         return ev_view_do_popup_menu (view, event->x, event->y);
3642         }
3643
3644         return FALSE;
3645 }
3646
3647 static void
3648 ev_view_remove_all (EvView *view)
3649 {
3650         GList *children, *child;
3651
3652         children = gtk_container_get_children (GTK_CONTAINER (view));
3653         for (child = children; child && child->data; child = g_list_next (child)) {
3654                 gtk_container_remove (GTK_CONTAINER (view),
3655                                       GTK_WIDGET (child->data));
3656         }
3657         g_list_free (children);
3658 }
3659
3660 /*** Drag and Drop ***/
3661 static void
3662 ev_view_drag_data_get (GtkWidget        *widget,
3663                        GdkDragContext   *context,
3664                        GtkSelectionData *selection_data,
3665                        guint             info,
3666                        guint             time)
3667 {
3668         EvView *view = EV_VIEW (widget);
3669
3670         switch (info) {
3671                 case TARGET_DND_TEXT:
3672                         if (EV_IS_SELECTION (view->document) &&
3673                             view->selection_info.selections) {
3674                                 gchar *text;
3675
3676                                 text = get_selected_text (view);
3677                                 gtk_selection_data_set_text (selection_data,
3678                                                              text,
3679                                                              strlen (text));
3680                                 g_free (text);
3681                         }
3682                         break;
3683                 case TARGET_DND_IMAGE:
3684                         if (view->image_dnd_info.image) {
3685                                 GdkPixbuf *pixbuf;
3686
3687                                 ev_document_doc_mutex_lock ();
3688                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3689                                                                        view->image_dnd_info.image);
3690                                 ev_document_doc_mutex_unlock ();
3691
3692                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3693                                 g_object_unref (pixbuf);
3694                         }
3695                         break;
3696                 case TARGET_DND_URI:
3697                         if (view->image_dnd_info.image) {
3698                                 GdkPixbuf   *pixbuf;
3699                                 const gchar *tmp_uri;
3700                                 gchar       *uris[2];
3701
3702                                 ev_document_doc_mutex_lock ();
3703                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3704                                                                        view->image_dnd_info.image);
3705                                 ev_document_doc_mutex_unlock ();
3706
3707                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3708                                 g_object_unref (pixbuf);
3709
3710                                 uris[0] = (gchar *)tmp_uri;
3711                                 uris[1] = NULL;
3712                                 gtk_selection_data_set_uris (selection_data, uris);
3713                         }
3714         }
3715 }
3716
3717 static gboolean
3718 ev_view_drag_motion (GtkWidget      *widget,
3719                      GdkDragContext *context,
3720                      gint            x,
3721                      gint            y,
3722                      guint           time)
3723 {
3724         if (gtk_drag_get_source_widget (context) == widget)
3725                 gdk_drag_status (context, 0, time);
3726         else
3727                 gdk_drag_status (context, gdk_drag_context_get_suggested_action (context), time);
3728
3729         return TRUE;
3730 }
3731
3732 static gboolean
3733 selection_update_idle_cb (EvView *view)
3734 {
3735         compute_selections (view,
3736                             view->selection_info.style,
3737                             &view->selection_info.start,
3738                             &view->motion);
3739         view->selection_update_id = 0;
3740         return FALSE;
3741 }
3742
3743 static gboolean
3744 selection_scroll_timeout_cb (EvView *view)
3745 {
3746         gint x, y, shift = 0;
3747         GtkWidget *widget = GTK_WIDGET (view);
3748         GtkAllocation allocation;
3749
3750         gtk_widget_get_allocation (widget, &allocation);
3751         gtk_widget_get_pointer (widget, &x, &y);
3752
3753         if (y > allocation.height) {
3754                 shift = (y - allocation.height) / 2;
3755         } else if (y < 0) {
3756                 shift = y / 2;
3757         }
3758
3759         if (shift)
3760                 gtk_adjustment_set_value (view->vadjustment,
3761                                           CLAMP (gtk_adjustment_get_value (view->vadjustment) + shift,
3762                                                  gtk_adjustment_get_lower (view->vadjustment),
3763                                                  gtk_adjustment_get_upper (view->vadjustment) -
3764                                                  gtk_adjustment_get_page_size (view->vadjustment)));
3765
3766         if (x > allocation.width) {
3767                 shift = (x - allocation.width) / 2;
3768         } else if (x < 0) {
3769                 shift = x / 2;
3770         }
3771
3772         if (shift)
3773                 gtk_adjustment_set_value (view->hadjustment,
3774                                           CLAMP (gtk_adjustment_get_value (view->hadjustment) + shift,
3775                                                  gtk_adjustment_get_lower (view->hadjustment),
3776                                                  gtk_adjustment_get_upper (view->hadjustment) -
3777                                                  gtk_adjustment_get_page_size (view->hadjustment)));
3778
3779         return TRUE;
3780 }
3781
3782 static gboolean
3783 ev_view_drag_update_momentum (EvView *view)
3784 {
3785         int i;
3786         if (!view->drag_info.in_drag)
3787                 return FALSE;
3788
3789         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3790                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3791                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3792         }
3793
3794         /* Momentum is a moving average of 10ms granularity over
3795          * the last 100ms with each 10ms stored in buffer.
3796          */
3797
3798         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3799         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3800
3801         return TRUE;
3802 }
3803
3804 static gboolean
3805 ev_view_scroll_drag_release (EvView *view)
3806 {
3807         gdouble dhadj_value, dvadj_value;
3808         gdouble oldhadjustment, oldvadjustment;
3809         gdouble h_page_size, v_page_size;
3810         gdouble h_upper, v_upper;
3811         GtkAllocation allocation;
3812
3813         view->drag_info.momentum.x /= 1.2;
3814         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3815
3816         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
3817
3818         h_page_size = gtk_adjustment_get_page_size (view->hadjustment);
3819         v_page_size = gtk_adjustment_get_page_size (view->vadjustment);
3820
3821         dhadj_value = h_page_size *
3822                       (gdouble)view->drag_info.momentum.x / allocation.width;
3823         dvadj_value = v_page_size *
3824                       (gdouble)view->drag_info.momentum.y / allocation.height;
3825
3826         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3827         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3828
3829         h_upper = gtk_adjustment_get_upper (view->hadjustment);
3830         v_upper = gtk_adjustment_get_upper (view->vadjustment);
3831
3832         /* When we reach the edges, we need either to absorb some momentum and bounce by
3833          * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3834         if (((oldhadjustment + dhadj_value) > (h_upper - h_page_size)) ||
3835             ((oldhadjustment + dhadj_value) < 0))
3836                 view->drag_info.momentum.x = 0;
3837         if (((oldvadjustment + dvadj_value) > (v_upper - v_page_size)) ||
3838             ((oldvadjustment + dvadj_value) < 0))
3839                 view->drag_info.momentum.y = 0;
3840
3841         gtk_adjustment_set_value (view->hadjustment,
3842                                   MIN (oldhadjustment + dhadj_value,
3843                                        h_upper - h_page_size));
3844         gtk_adjustment_set_value (view->vadjustment,
3845                                   MIN (oldvadjustment + dvadj_value,
3846                                        v_upper - v_page_size));
3847
3848         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3849             ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3850                 return FALSE;
3851         else
3852                 return TRUE;
3853 }
3854
3855 static gboolean
3856 ev_view_motion_notify_event (GtkWidget      *widget,
3857                              GdkEventMotion *event)
3858 {
3859         EvView    *view = EV_VIEW (widget);
3860         GdkWindow *window;
3861         gint       x, y;
3862
3863         if (!view->document)
3864                 return FALSE;
3865
3866         window = gtk_widget_get_window (widget);
3867
3868         if (event->is_hint || event->window != window) {
3869             gtk_widget_get_pointer (widget, &x, &y);
3870         } else {
3871             x = event->x;
3872             y = event->y;
3873         }
3874
3875         if (view->scroll_info.autoscrolling) {
3876                 view->scroll_info.last_y = y;
3877                 return TRUE;
3878         }
3879
3880         if (view->selection_info.in_drag) {
3881                 if (gtk_drag_check_threshold (widget,
3882                                               view->selection_info.start.x,
3883                                               view->selection_info.start.y,
3884                                               x, y)) {
3885                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3886
3887                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3888
3889                         gtk_drag_begin (widget, target_list,
3890                                         GDK_ACTION_COPY,
3891                                         1, (GdkEvent *)event);
3892
3893                         view->selection_info.in_drag = FALSE;
3894
3895                         gtk_target_list_unref (target_list);
3896
3897                         return TRUE;
3898                 }
3899         } else if (view->image_dnd_info.in_drag) {
3900                 if (gtk_drag_check_threshold (widget,
3901                                               view->selection_info.start.x,
3902                                               view->selection_info.start.y,
3903                                               x, y)) {
3904                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3905
3906                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3907                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3908
3909                         gtk_drag_begin (widget, target_list,
3910                                         GDK_ACTION_COPY,
3911                                         1, (GdkEvent *)event);
3912
3913                         view->image_dnd_info.in_drag = FALSE;
3914
3915                         gtk_target_list_unref (target_list);
3916
3917                         return TRUE;
3918                 }
3919         }
3920
3921         switch (view->pressed_button) {
3922         case 1:
3923                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3924                  * documents only.
3925                  */
3926                 if (view->rotation != 0)
3927                         return FALSE;
3928
3929                 /* Schedule timeout to scroll during selection and additionally
3930                  * scroll once to allow arbitrary speed. */
3931                 if (!view->selection_scroll_id)
3932                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3933                                                                (GSourceFunc)selection_scroll_timeout_cb,
3934                                                                view);
3935                 else
3936                     selection_scroll_timeout_cb (view);
3937
3938                 view->selection_info.in_selection = TRUE;
3939                 view->motion.x = x + view->scroll_x;
3940                 view->motion.y = y + view->scroll_y;
3941
3942                 /* Queue an idle to handle the motion.  We do this because
3943                  * handling any selection events in the motion could be slower
3944                  * than new motion events reach us.  We always put it in the
3945                  * idle to make sure we catch up and don't visibly lag the
3946                  * mouse. */
3947                 if (!view->selection_update_id)
3948                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3949
3950                 return TRUE;
3951         case 2:
3952                 if (!view->drag_info.in_drag) {
3953                         gboolean start;
3954                         int i;
3955
3956                         start = gtk_drag_check_threshold (widget,
3957                                                           view->drag_info.start.x,
3958                                                           view->drag_info.start.y,
3959                                                           event->x_root,
3960                                                           event->y_root);
3961                         view->drag_info.in_drag = start;
3962                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3963                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3964                         /* Set 100 to choose how long it takes to build up momentum */
3965                         /* Clear out previous momentum info: */
3966                         for (i = 0; i < DRAG_HISTORY; i++) {
3967                                 view->drag_info.buffer[i].x = event->x;
3968                                 view->drag_info.buffer[i].y = event->y;
3969                         }
3970                         view->drag_info.momentum.x = 0;
3971                         view->drag_info.momentum.y = 0;
3972                 }
3973
3974                 if (view->drag_info.in_drag) {
3975                         int dx, dy;
3976                         gdouble dhadj_value, dvadj_value;
3977                         GtkAllocation allocation;
3978
3979                         view->drag_info.buffer[0].x = event->x;
3980                         view->drag_info.buffer[0].y = event->y;
3981
3982                         dx = event->x_root - view->drag_info.start.x;
3983                         dy = event->y_root - view->drag_info.start.y;
3984
3985                         gtk_widget_get_allocation (widget, &allocation);
3986
3987                         dhadj_value = gtk_adjustment_get_page_size (view->hadjustment) *
3988                                       (gdouble)dx / allocation.width;
3989                         dvadj_value = gtk_adjustment_get_page_size (view->vadjustment) *
3990                                       (gdouble)dy / allocation.height;
3991
3992                         /* clamp scrolling to visible area */
3993                         gtk_adjustment_set_value (view->hadjustment,
3994                                                   MIN (view->drag_info.hadj - dhadj_value,
3995                                                        gtk_adjustment_get_upper (view->hadjustment) -
3996                                                        gtk_adjustment_get_page_size (view->hadjustment)));
3997                         gtk_adjustment_set_value (view->vadjustment,
3998                                                   MIN (view->drag_info.vadj - dvadj_value,
3999                                                        gtk_adjustment_get_upper (view->vadjustment) -
4000                                                        gtk_adjustment_get_page_size (view->vadjustment)));
4001
4002                         return TRUE;
4003                 }
4004
4005                 break;
4006         default:
4007                 ev_view_handle_cursor_over_xy (view, x, y);
4008         }
4009
4010         return FALSE;
4011 }
4012
4013 static gboolean
4014 ev_view_button_release_event (GtkWidget      *widget,
4015                               GdkEventButton *event)
4016 {
4017         EvView *view = EV_VIEW (widget);
4018         EvLink *link = NULL;
4019
4020         view->image_dnd_info.in_drag = FALSE;
4021
4022         if (view->scroll_info.autoscrolling) {
4023                 ev_view_autoscroll_stop (view);
4024                 view->pressed_button = -1;
4025
4026                 return TRUE;
4027         }
4028
4029         if (view->pressed_button == 1 && event->state & GDK_CONTROL_MASK) {
4030                 view->pressed_button = -1;
4031                 return TRUE;
4032         }
4033
4034         if (view->drag_info.in_drag) {
4035                 view->drag_info.release_timeout_id =
4036                         g_timeout_add (20,
4037                                        (GSourceFunc)ev_view_scroll_drag_release, view);
4038         }
4039
4040         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
4041                 link = ev_view_get_link_at_location (view, event->x, event->y);
4042         }
4043
4044         view->drag_info.in_drag = FALSE;
4045
4046         if (view->adding_annot && view->pressed_button == 1) {
4047                 view->adding_annot = FALSE;
4048                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
4049                 view->pressed_button = -1;
4050
4051                 ev_view_create_annotation (view,
4052                                            view->adding_annot_type,
4053                                            event->x + view->scroll_x,
4054                                            event->y + view->scroll_y);
4055
4056                 return FALSE;
4057         }
4058
4059         if (view->pressed_button == 2) {
4060                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
4061         }
4062
4063         view->pressed_button = -1;
4064
4065         if (view->selection_scroll_id) {
4066             g_source_remove (view->selection_scroll_id);
4067             view->selection_scroll_id = 0;
4068         }
4069         if (view->selection_update_id) {
4070             g_source_remove (view->selection_update_id);
4071             view->selection_update_id = 0;
4072         }
4073
4074         if (view->selection_info.selections) {
4075                 clear_link_selected (view);
4076                 ev_view_update_primary_selection (view);
4077
4078                 if (view->selection_info.in_drag) {
4079                         clear_selection (view);
4080                         gtk_widget_queue_draw (widget);
4081                 }
4082
4083                 view->selection_info.in_drag = FALSE;
4084         } else if (link) {
4085                 if (event->button == 2) {
4086                         EvLinkAction    *action;
4087                         EvLinkActionType type;
4088
4089                         action = ev_link_get_action (link);
4090                         if (!action)
4091                                 return FALSE;
4092
4093                         type = ev_link_action_get_action_type (action);
4094                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
4095                                 g_signal_emit (view,
4096                                                signals[SIGNAL_EXTERNAL_LINK],
4097                                                0, action);
4098                         }
4099                 } else {
4100                         ev_view_handle_link (view, link);
4101                 }
4102         }
4103
4104         return FALSE;
4105 }
4106
4107 static gboolean
4108 ev_view_key_press_event (GtkWidget   *widget,
4109                          GdkEventKey *event)
4110 {
4111         EvView *view = EV_VIEW (widget);
4112
4113         if (!view->document)
4114                 return FALSE;
4115
4116         if (!gtk_widget_has_focus (widget)) {
4117                 /* Forward key events to current focused window child */
4118                 if (view->window_child_focus) {
4119                         GdkEventKey *new_event;
4120                         gboolean     handled;
4121
4122                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
4123                         g_object_unref (new_event->window);
4124                         new_event->window = gtk_widget_get_window (view->window_child_focus->window);
4125                         if (new_event->window)
4126                                 g_object_ref (new_event->window);
4127                         gtk_widget_realize (view->window_child_focus->window);
4128                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
4129                         gdk_event_free ((GdkEvent *)new_event);
4130
4131                         return handled;
4132                 }
4133
4134                 return FALSE;
4135         }
4136
4137         return gtk_bindings_activate_event (G_OBJECT (widget), event);
4138 }
4139
4140 static gint
4141 ev_view_focus_in (GtkWidget     *widget,
4142                   GdkEventFocus *event)
4143 {
4144         if (EV_VIEW (widget)->pixbuf_cache)
4145                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4146         gtk_widget_queue_draw (widget);
4147
4148         return FALSE;
4149 }
4150
4151 static gint
4152 ev_view_focus_out (GtkWidget     *widget,
4153                    GdkEventFocus *event)
4154 {
4155         if (EV_VIEW (widget)->pixbuf_cache)
4156                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4157         gtk_widget_queue_draw (widget);
4158
4159         return FALSE;
4160 }
4161
4162 static gboolean
4163 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4164 {
4165         EvView *view = EV_VIEW (widget);
4166
4167         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4168                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4169
4170         return FALSE;
4171 }
4172
4173 static gboolean
4174 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4175 {
4176         EvView *view = EV_VIEW (widget);
4177
4178         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4179
4180         return FALSE;
4181 }
4182
4183 static void
4184 ev_view_style_updated (GtkWidget *widget)
4185 {
4186         if (EV_VIEW (widget)->pixbuf_cache)
4187                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4188
4189         GTK_WIDGET_CLASS (ev_view_parent_class)->style_updated (widget);
4190 }
4191
4192 /*** Drawing ***/
4193
4194 static void
4195 draw_rubberband (EvView             *view,
4196                  cairo_t            *cr,
4197                  const GdkRectangle *rect,
4198                  gdouble             alpha)
4199 {
4200         GtkStyleContext *context;
4201         GdkRGBA          color;
4202
4203         context = gtk_widget_get_style_context (GTK_WIDGET (view));
4204         gtk_style_context_get_background_color (context, GTK_STATE_FLAG_SELECTED, &color);
4205         cairo_save (cr);
4206
4207         cairo_set_source_rgba (cr, color.red, color.green, color.blue, alpha);
4208         cairo_rectangle (cr,
4209                          rect->x - view->scroll_x,
4210                          rect->y - view->scroll_y,
4211                          rect->width, rect->height);
4212         cairo_fill_preserve (cr);
4213
4214         cairo_set_line_width (cr, 0.5);
4215         cairo_set_source_rgb (cr, color.red, color.green, color.blue);
4216         cairo_stroke (cr);
4217
4218         cairo_restore (cr);
4219 }
4220
4221
4222 static void
4223 highlight_find_results (EvView *view,
4224                         cairo_t *cr,
4225                         int page)
4226 {
4227         gint       i, n_results = 0;
4228         n_results = ev_view_find_get_n_results (view, page);
4229
4230         for (i = 0; i < n_results; i++) {
4231                 EvRectangle *rectangle;
4232                 GdkRectangle view_rectangle;
4233                 gdouble      alpha;
4234
4235                 if (i == view->find_result && page == view->current_page) {
4236                         alpha = 0.6;
4237                 } else {
4238                         alpha = 0.3;
4239                 }
4240
4241                 rectangle = ev_view_find_get_result (view, page, i);
4242                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4243                 draw_rubberband (view, cr, &view_rectangle, alpha);
4244         }
4245 }
4246
4247 static void
4248 highlight_forward_search_results (EvView *view,
4249                                   cairo_t *cr,
4250                                   int page)
4251 {
4252         GdkRectangle rect;
4253         EvMapping   *mapping = view->synctex_result;
4254
4255         if (GPOINTER_TO_INT (mapping->data) != page)
4256                 return;
4257
4258         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4259
4260         cairo_save (cr);
4261         cairo_set_source_rgb (cr, 1., 0., 0.);
4262         cairo_rectangle (cr,
4263                          rect.x - view->scroll_x,
4264                          rect.y - view->scroll_y,
4265                          rect.width, rect.height);
4266         cairo_stroke (cr);
4267         cairo_restore (cr);
4268 }
4269
4270 static void
4271 focus_annotation (EvView       *view,
4272                   cairo_t      *cr,
4273                   gint          page,
4274                   GdkRectangle *clip)
4275 {
4276         GtkWidget    *widget = GTK_WIDGET (view);
4277         GdkRectangle  rect;
4278         EvMapping    *mapping = view->focus_annotation;
4279         EvAnnotation *annot = (EvAnnotation *)mapping->data;
4280
4281         if (ev_annotation_get_page_index (annot) != page)
4282                 return;
4283
4284         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4285
4286         gtk_render_focus (gtk_widget_get_style_context (widget),
4287                           cr,
4288                           rect.x - view->scroll_x,
4289                           rect.y - view->scroll_y,
4290                           rect.width + 1, rect.height + 1);
4291 }
4292
4293 static void
4294 ev_view_loading_window_move (EvView *view)
4295 {
4296         GtkWidget       *widget = GTK_WIDGET (view);
4297         EvLoadingWindow *window = EV_LOADING_WINDOW (view->loading_window);
4298         gint             root_x, root_y;
4299         gint             window_width;
4300         GtkAllocation    allocation;
4301
4302         gtk_widget_get_allocation (widget, &allocation);
4303         gdk_window_get_origin (gtk_widget_get_window (widget), &root_x, &root_y);
4304         ev_loading_window_get_size (window, &window_width, NULL);
4305
4306         root_x += allocation.width - window_width - 10;
4307         root_y += 10;
4308
4309         ev_loading_window_move (window, root_x, root_y);
4310 }
4311
4312 static gboolean
4313 show_loading_window_cb (EvView *view)
4314 {
4315         if (!view->loading_window) {
4316                 GtkWindow *parent;
4317                 GdkScreen *screen;
4318
4319                 parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
4320                 view->loading_window = ev_loading_window_new (parent);
4321
4322                 /* Show the window off screen to get a valid size asap */
4323                 screen = gtk_widget_get_screen (GTK_WIDGET (view));
4324                 gtk_window_move (GTK_WINDOW (view->loading_window),
4325                                  gdk_screen_get_width (screen) + 1,
4326                                  gdk_screen_get_height (screen) + 1);
4327                 gtk_widget_show (view->loading_window);
4328         }
4329
4330         ev_view_loading_window_move (view);
4331
4332         gtk_widget_show (view->loading_window);
4333
4334         view->loading_timeout = 0;
4335
4336         return FALSE;
4337 }
4338
4339 static void
4340 show_loading_window (EvView *view)
4341 {
4342         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4343                 ev_view_loading_window_move (view);
4344                 return;
4345         }
4346
4347         if (!view->loading_timeout) {
4348                 view->loading_timeout =
4349                         g_timeout_add_full (G_PRIORITY_LOW,
4350                                             0.5, (GSourceFunc)show_loading_window_cb,
4351                                             view, NULL);
4352         }
4353 }
4354
4355 static void
4356 hide_loading_window (EvView *view)
4357 {
4358         if (view->loading_timeout) {
4359                 g_source_remove (view->loading_timeout);
4360                 view->loading_timeout = 0;
4361         }
4362
4363         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4364                 gtk_widget_hide (view->loading_window);
4365         }
4366 }
4367
4368 static void
4369 draw_one_page (EvView       *view,
4370                gint          page,
4371                cairo_t      *cr,
4372                GdkRectangle *page_area,
4373                GtkBorder    *border,
4374                GdkRectangle *expose_area,
4375                gboolean     *page_ready)
4376 {
4377         GdkRectangle overlap;
4378         GdkRectangle real_page_area;
4379         gint         current_page;
4380         gboolean     inverted_colors;
4381
4382         g_assert (view->document);
4383
4384         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4385                 return;
4386
4387         /* Render the document itself */
4388         real_page_area = *page_area;
4389
4390         real_page_area.x += border->left;
4391         real_page_area.y += border->top;
4392         real_page_area.width -= (border->left + border->right);
4393         real_page_area.height -= (border->top + border->bottom);
4394         *page_ready = TRUE;
4395
4396         current_page = ev_document_model_get_page (view->model);
4397         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4398         ev_document_misc_paint_one_page (cr,
4399                                          GTK_WIDGET (view),
4400                                          page_area, border,
4401                                          page == current_page,
4402                                          inverted_colors);
4403
4404         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4405                 gint             width, height;
4406                 gint             page_width, page_height;
4407                 cairo_surface_t *page_surface = NULL;
4408                 gint             selection_width, selection_height;
4409                 cairo_surface_t *selection_surface = NULL;
4410
4411                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4412
4413                 if (!page_surface) {
4414                         if (page == current_page)
4415                                 show_loading_window (view);
4416
4417                         *page_ready = FALSE;
4418
4419                         return;
4420                 }
4421
4422                 if (page == current_page)
4423                         hide_loading_window (view);
4424
4425                 ev_view_get_page_size (view, page, &width, &height);
4426
4427                 page_width = cairo_image_surface_get_width (page_surface);
4428                 page_height = cairo_image_surface_get_height (page_surface);
4429
4430                 cairo_save (cr);
4431                 cairo_translate (cr, overlap.x, overlap.y);
4432
4433                 if (width != page_width || height != page_height) {
4434                         cairo_pattern_set_filter (cairo_get_source (cr),
4435                                                   CAIRO_FILTER_FAST);
4436                         cairo_scale (cr,
4437                                      (gdouble)width / page_width,
4438                                      (gdouble)height / page_height);
4439                 }
4440
4441                 cairo_surface_set_device_offset (page_surface,
4442                                                  overlap.x - real_page_area.x,
4443                                                  overlap.y - real_page_area.y);
4444                 cairo_set_source_surface (cr, page_surface, 0, 0);
4445                 cairo_paint (cr);
4446                 cairo_restore (cr);
4447
4448                 /* Get the selection pixbuf iff we have something to draw */
4449                 if (find_selection_for_page (view, page) &&
4450                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4451                         selection_surface =
4452                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4453                                                                        page,
4454                                                                        view->scale,
4455                                                                        NULL);
4456                 }
4457
4458                 if (!selection_surface) {
4459                         return;
4460                 }
4461
4462                 selection_width = cairo_image_surface_get_width (selection_surface);
4463                 selection_height = cairo_image_surface_get_height (selection_surface);
4464
4465                 cairo_save (cr);
4466                 cairo_translate (cr, overlap.x, overlap.y);
4467
4468                 if (width != selection_width || height != selection_height) {
4469                         cairo_pattern_set_filter (cairo_get_source (cr),
4470                                                   CAIRO_FILTER_FAST);
4471                         cairo_scale (cr,
4472                                      (gdouble)width / selection_width,
4473                                      (gdouble)height / selection_height);
4474                 }
4475
4476                 cairo_surface_set_device_offset (selection_surface,
4477                                                  overlap.x - real_page_area.x,
4478                                                  overlap.y - real_page_area.y);
4479
4480                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4481                 cairo_paint (cr);
4482                 cairo_restore (cr);
4483         }
4484 }
4485
4486 /*** GObject functions ***/
4487
4488 static void
4489 ev_view_finalize (GObject *object)
4490 {
4491         EvView *view = EV_VIEW (object);
4492
4493         clear_selection (view);
4494         clear_link_selected (view);
4495
4496         if (view->synctex_result) {
4497                 g_free (view->synctex_result);
4498                 view->synctex_result = NULL;
4499         }
4500
4501         if (view->image_dnd_info.image)
4502                 g_object_unref (view->image_dnd_info.image);
4503         view->image_dnd_info.image = NULL;
4504
4505         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4506 }
4507
4508 static void
4509 ev_view_dispose (GObject *object)
4510 {
4511         EvView *view = EV_VIEW (object);
4512
4513         if (view->model) {
4514                 g_object_unref (view->model);
4515                 view->model = NULL;
4516         }
4517
4518         if (view->pixbuf_cache) {
4519                 g_object_unref (view->pixbuf_cache);
4520                 view->pixbuf_cache = NULL;
4521         }
4522
4523         if (view->document) {
4524                 g_object_unref (view->document);
4525                 view->document = NULL;
4526         }
4527
4528         if (view->page_cache) {
4529                 g_object_unref (view->page_cache);
4530                 view->page_cache = NULL;
4531         }
4532
4533         ev_view_window_children_free (view);
4534
4535         if (view->selection_scroll_id) {
4536             g_source_remove (view->selection_scroll_id);
4537             view->selection_scroll_id = 0;
4538         }
4539
4540         if (view->selection_update_id) {
4541             g_source_remove (view->selection_update_id);
4542             view->selection_update_id = 0;
4543         }
4544
4545         if (view->scroll_info.timeout_id) {
4546             g_source_remove (view->scroll_info.timeout_id);
4547             view->scroll_info.timeout_id = 0;
4548         }
4549
4550         if (view->drag_info.drag_timeout_id) {
4551                 g_source_remove (view->drag_info.drag_timeout_id);
4552                 view->drag_info.drag_timeout_id = 0;
4553         }
4554
4555         if (view->drag_info.release_timeout_id) {
4556                 g_source_remove (view->drag_info.release_timeout_id);
4557                 view->drag_info.release_timeout_id = 0;
4558         }
4559
4560         if (view->loading_timeout) {
4561                 g_source_remove (view->loading_timeout);
4562                 view->loading_timeout = 0;
4563         }
4564
4565         gtk_scrollable_set_hadjustment (GTK_SCROLLABLE (view), NULL);
4566         gtk_scrollable_set_vadjustment (GTK_SCROLLABLE (view), NULL);
4567
4568         G_OBJECT_CLASS (ev_view_parent_class)->dispose (object);
4569 }
4570
4571 static void
4572 ev_view_get_property (GObject     *object,
4573                       guint        prop_id,
4574                       GValue      *value,
4575                       GParamSpec  *pspec)
4576 {
4577         EvView *view = EV_VIEW (object);
4578
4579         switch (prop_id) {
4580         case PROP_HADJUSTMENT:
4581                 g_value_set_object (value, view->hadjustment);
4582                 break;
4583         case PROP_VADJUSTMENT:
4584                 g_value_set_object (value, view->vadjustment);
4585                 break;
4586         case PROP_HSCROLL_POLICY:
4587                 g_value_set_enum (value, view->hscroll_policy);
4588                 break;
4589         case PROP_VSCROLL_POLICY:
4590                 g_value_set_enum (value, view->vscroll_policy);
4591                 break;
4592         default:
4593                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4594                 break;
4595         }
4596 }
4597
4598 static void
4599 ev_view_set_property (GObject      *object,
4600                       guint         prop_id,
4601                       const GValue *value,
4602                       GParamSpec   *pspec)
4603 {
4604         EvView *view = EV_VIEW (object);
4605
4606         switch (prop_id) {
4607         case PROP_HADJUSTMENT:
4608                 ev_view_set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL,
4609                                                (GtkAdjustment *) g_value_get_object (value));
4610                 break;
4611         case PROP_VADJUSTMENT:
4612                 ev_view_set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL,
4613                                                (GtkAdjustment *) g_value_get_object (value));
4614                 break;
4615         case PROP_HSCROLL_POLICY:
4616                 view->hscroll_policy = g_value_get_enum (value);
4617                 gtk_widget_queue_resize (GTK_WIDGET (view));
4618                 break;
4619         case PROP_VSCROLL_POLICY:
4620                 view->vscroll_policy = g_value_get_enum (value);
4621                 gtk_widget_queue_resize (GTK_WIDGET (view));
4622                 break;
4623         default:
4624                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4625                 break;
4626         }
4627 }
4628
4629 /* Accessibility */
4630 static void
4631 ev_view_init_accessibility (EvView *view)
4632 {
4633         static gboolean first_time = TRUE;
4634
4635         if (first_time) {
4636                 AtkObjectFactory *factory;
4637                 AtkRegistry *registry;
4638                 GType derived_type;
4639                 GType derived_atk_type;
4640
4641                 /*
4642                  * Figure out whether accessibility is enabled by looking at the
4643                  * type of the accessible object which would be created for
4644                  * the parent type of EvView.
4645                  */
4646                 derived_type = g_type_parent (EV_TYPE_VIEW);
4647
4648                 registry = atk_get_default_registry ();
4649                 factory = atk_registry_get_factory (registry,
4650                                                     derived_type);
4651                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4652                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE)) {
4653                         atk_registry_set_factory_type (registry,
4654                                                        EV_TYPE_VIEW,
4655                                                        ev_view_accessible_factory_get_type ());
4656                         view->a11y_enabled = TRUE;
4657                 }
4658                 first_time = FALSE;
4659         }
4660 }
4661
4662 static AtkObject *
4663 ev_view_get_accessible (GtkWidget *widget)
4664 {
4665         ev_view_init_accessibility (EV_VIEW (widget));
4666         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4667 }
4668
4669 static gboolean
4670 ev_view_is_a11y_enabled (EvView *view)
4671 {
4672         ev_view_init_accessibility (view);
4673         return view->a11y_enabled;
4674 }
4675
4676 static void
4677 ev_view_class_init (EvViewClass *class)
4678 {
4679         GObjectClass *object_class = G_OBJECT_CLASS (class);
4680         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4681         GtkBindingSet *binding_set;
4682
4683         object_class->get_property = ev_view_get_property;
4684         object_class->set_property = ev_view_set_property;
4685         object_class->dispose = ev_view_dispose;
4686         object_class->finalize = ev_view_finalize;
4687
4688         widget_class->draw = ev_view_draw;
4689         widget_class->button_press_event = ev_view_button_press_event;
4690         widget_class->motion_notify_event = ev_view_motion_notify_event;
4691         widget_class->button_release_event = ev_view_button_release_event;
4692         widget_class->key_press_event = ev_view_key_press_event;
4693         widget_class->focus_in_event = ev_view_focus_in;
4694         widget_class->focus_out_event = ev_view_focus_out;
4695         widget_class->get_accessible = ev_view_get_accessible;
4696         widget_class->get_preferred_width = ev_view_get_preferred_width;
4697         widget_class->get_preferred_height = ev_view_get_preferred_height;
4698         widget_class->size_allocate = ev_view_size_allocate;
4699         widget_class->scroll_event = ev_view_scroll_event;
4700         widget_class->enter_notify_event = ev_view_enter_notify_event;
4701         widget_class->leave_notify_event = ev_view_leave_notify_event;
4702         widget_class->style_updated = ev_view_style_updated;
4703         widget_class->drag_data_get = ev_view_drag_data_get;
4704         widget_class->drag_motion = ev_view_drag_motion;
4705         widget_class->popup_menu = ev_view_popup_menu;
4706         widget_class->query_tooltip = ev_view_query_tooltip;
4707
4708         class->binding_activated = ev_view_scroll;
4709
4710         /* Scrollable interface */
4711         g_object_class_override_property (object_class, PROP_HADJUSTMENT, "hadjustment");
4712         g_object_class_override_property (object_class, PROP_VADJUSTMENT, "vadjustment");
4713         g_object_class_override_property (object_class, PROP_HSCROLL_POLICY, "hscroll-policy");
4714         g_object_class_override_property (object_class, PROP_VSCROLL_POLICY, "vscroll-policy");
4715
4716         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4717                          G_TYPE_FROM_CLASS (object_class),
4718                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4719                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4720                          NULL, NULL,
4721                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4722                          G_TYPE_NONE, 2,
4723                          GTK_TYPE_SCROLL_TYPE,
4724                          G_TYPE_BOOLEAN);
4725         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4726                          G_TYPE_FROM_CLASS (object_class),
4727                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4728                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4729                          NULL, NULL,
4730                          g_cclosure_marshal_VOID__OBJECT,
4731                          G_TYPE_NONE, 1,
4732                          G_TYPE_OBJECT);
4733         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4734                          G_TYPE_FROM_CLASS (object_class),
4735                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4736                          G_STRUCT_OFFSET (EvViewClass, external_link),
4737                          NULL, NULL,
4738                          g_cclosure_marshal_VOID__OBJECT,
4739                          G_TYPE_NONE, 1,
4740                          G_TYPE_OBJECT);
4741         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4742                          G_TYPE_FROM_CLASS (object_class),
4743                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4744                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4745                          NULL, NULL,
4746                          g_cclosure_marshal_VOID__POINTER,
4747                          G_TYPE_NONE, 1,
4748                          G_TYPE_POINTER);
4749         signals[SIGNAL_SELECTION_CHANGED] = g_signal_new ("selection-changed",
4750                          G_TYPE_FROM_CLASS (object_class),
4751                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4752                          G_STRUCT_OFFSET (EvViewClass, selection_changed),
4753                          NULL, NULL,
4754                          g_cclosure_marshal_VOID__VOID,
4755                          G_TYPE_NONE, 0,
4756                          G_TYPE_NONE);
4757         signals[SIGNAL_SYNC_SOURCE] = g_signal_new ("sync-source",
4758                          G_TYPE_FROM_CLASS (object_class),
4759                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4760                          G_STRUCT_OFFSET (EvViewClass, sync_source),
4761                          NULL, NULL,
4762                          g_cclosure_marshal_VOID__POINTER,
4763                          G_TYPE_NONE, 1,
4764                          G_TYPE_POINTER);
4765         signals[SIGNAL_ANNOT_ADDED] = g_signal_new ("annot-added",
4766                          G_TYPE_FROM_CLASS (object_class),
4767                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4768                          G_STRUCT_OFFSET (EvViewClass, annot_added),
4769                          NULL, NULL,
4770                          g_cclosure_marshal_VOID__OBJECT,
4771                          G_TYPE_NONE, 1,
4772                          EV_TYPE_ANNOTATION);
4773         signals[SIGNAL_LAYERS_CHANGED] = g_signal_new ("layers-changed",
4774                          G_TYPE_FROM_CLASS (object_class),
4775                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4776                          G_STRUCT_OFFSET (EvViewClass, layers_changed),
4777                          NULL, NULL,
4778                          g_cclosure_marshal_VOID__VOID,
4779                          G_TYPE_NONE, 0,
4780                          G_TYPE_NONE);
4781
4782         binding_set = gtk_binding_set_by_class (class);
4783
4784         add_scroll_binding_keypad (binding_set, GDK_KEY_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4785         add_scroll_binding_keypad (binding_set, GDK_KEY_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4786         add_scroll_binding_keypad (binding_set, GDK_KEY_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4787         add_scroll_binding_keypad (binding_set, GDK_KEY_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4788         add_scroll_binding_keypad (binding_set, GDK_KEY_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4789         add_scroll_binding_keypad (binding_set, GDK_KEY_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4790         add_scroll_binding_keypad (binding_set, GDK_KEY_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4791         add_scroll_binding_keypad (binding_set, GDK_KEY_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4792         gtk_binding_entry_add_signal (binding_set, GDK_KEY_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4793                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4794         gtk_binding_entry_add_signal (binding_set, GDK_KEY_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4795                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4796         gtk_binding_entry_add_signal (binding_set, GDK_KEY_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4797                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4798         gtk_binding_entry_add_signal (binding_set, GDK_KEY_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4799                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4800
4801 }
4802
4803 static void
4804 ev_view_init (EvView *view)
4805 {
4806         gtk_widget_set_has_window (GTK_WIDGET (view), TRUE);
4807         gtk_widget_set_can_focus (GTK_WIDGET (view), TRUE);
4808         gtk_widget_set_redraw_on_allocate (GTK_WIDGET (view), FALSE);
4809         gtk_container_set_resize_mode (GTK_CONTAINER (view), GTK_RESIZE_QUEUE);
4810
4811         gtk_widget_set_events (GTK_WIDGET (view),
4812                                GDK_EXPOSURE_MASK |
4813                                GDK_BUTTON_PRESS_MASK |
4814                                GDK_BUTTON_RELEASE_MASK |
4815                                GDK_SCROLL_MASK |
4816                                GDK_KEY_PRESS_MASK |
4817                                GDK_POINTER_MOTION_MASK |
4818                                GDK_POINTER_MOTION_HINT_MASK |
4819                                GDK_ENTER_NOTIFY_MASK |
4820                                GDK_LEAVE_NOTIFY_MASK);
4821
4822         view->start_page = -1;
4823         view->end_page = -1;
4824         view->spacing = 5;
4825         view->scale = 1.0;
4826         view->current_page = 0;
4827         view->pressed_button = -1;
4828         view->cursor = EV_VIEW_CURSOR_NORMAL;
4829         view->drag_info.in_drag = FALSE;
4830         view->scroll_info.autoscrolling = FALSE;
4831         view->selection_info.selections = NULL;
4832         view->selection_info.in_selection = FALSE;
4833         view->selection_info.in_drag = FALSE;
4834         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4835         view->continuous = TRUE;
4836         view->dual_page = FALSE;
4837         view->fullscreen = FALSE;
4838         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4839         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4840         view->jump_to_find_result = TRUE;
4841         view->highlight_find_results = FALSE;
4842 }
4843
4844 /*** Callbacks ***/
4845
4846 static void
4847 ev_view_change_page (EvView *view,
4848                      gint    new_page)
4849 {
4850         gint x, y;
4851
4852         view->current_page = new_page;
4853         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4854
4855         hide_loading_window (view);
4856
4857         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4858         ev_view_handle_cursor_over_xy (view, x, y);
4859
4860         gtk_widget_queue_resize (GTK_WIDGET (view));
4861 }
4862
4863 static void
4864 job_finished_cb (EvPixbufCache  *pixbuf_cache,
4865                  cairo_region_t *region,
4866                  EvView         *view)
4867 {
4868         if (region) {
4869                 gdk_window_invalidate_region (gtk_widget_get_window (GTK_WIDGET (view)), region, TRUE);
4870         } else {
4871                 gtk_widget_queue_draw (GTK_WIDGET (view));
4872         }
4873 }
4874
4875 static void
4876 ev_view_page_changed_cb (EvDocumentModel *model,
4877                          gint             old_page,
4878                          gint             new_page,
4879                          EvView          *view)
4880 {
4881         if (!view->document)
4882                 return;
4883
4884         if (view->current_page != new_page) {
4885                 ev_view_change_page (view, new_page);
4886         } else {
4887                 gtk_widget_queue_draw (GTK_WIDGET (view));
4888         }
4889
4890         view->find_result = 0;
4891 }
4892
4893 static void
4894 on_adjustment_value_changed (GtkAdjustment *adjustment,
4895                              EvView        *view)
4896 {
4897         int dx = 0, dy = 0;
4898         gint x, y;
4899         gint value;
4900         GList *children, *l;
4901
4902         if (!gtk_widget_get_realized (GTK_WIDGET (view)))
4903                 return;
4904
4905         if (view->hadjustment) {
4906                 value = (gint) gtk_adjustment_get_value (view->hadjustment);
4907                 dx = view->scroll_x - value;
4908                 view->scroll_x = value;
4909         } else {
4910                 view->scroll_x = 0;
4911         }
4912
4913         if (view->vadjustment) {
4914                 value = (gint) gtk_adjustment_get_value (view->vadjustment);
4915                 dy = view->scroll_y - value;
4916                 view->scroll_y = value;
4917         } else {
4918                 view->scroll_y = 0;
4919         }
4920
4921         children = gtk_container_get_children (GTK_CONTAINER (view));
4922         for (l = children; l && l->data; l = g_list_next (l)) {
4923                 gint       child_x, child_y;
4924                 GtkWidget *child = (GtkWidget *)l->data;
4925
4926                 gtk_container_child_get (GTK_CONTAINER (view),
4927                                          child,
4928                                          "x", &child_x,
4929                                          "y", &child_y,
4930                                          NULL);
4931                 gtk_fixed_move (GTK_FIXED (view), child, child_x + dx, child_y + dy);
4932         }
4933         g_list_free (children);
4934
4935         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4936                 EvViewWindowChild *child;
4937
4938                 child = (EvViewWindowChild *)l->data;
4939
4940                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4941         }
4942
4943         if (view->pending_resize) {
4944                 gtk_widget_queue_draw (GTK_WIDGET (view));
4945         } else {
4946                 gdk_window_scroll (gtk_widget_get_window (GTK_WIDGET (view)), dx, dy);
4947         }
4948
4949         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4950         ev_view_handle_cursor_over_xy (view, x, y);
4951
4952         if (view->document)
4953                 view_update_range_and_current_page (view);
4954 }
4955
4956 GtkWidget*
4957 ev_view_new (void)
4958 {
4959         GtkWidget *view;
4960
4961         view = g_object_new (EV_TYPE_VIEW, NULL);
4962
4963         return view;
4964 }
4965
4966 static void
4967 setup_caches (EvView *view)
4968 {
4969         gboolean inverted_colors;
4970
4971         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
4972         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->model, view->pixbuf_cache_size);
4973         view->page_cache = ev_page_cache_new (view->document);
4974         if (ev_view_is_a11y_enabled (view)) {
4975                 EvJobPageDataFlags flags = ev_page_cache_get_flags (view->page_cache);
4976
4977                 ev_page_cache_set_flags (view->page_cache,
4978                                          flags |
4979                                          EV_PAGE_DATA_INCLUDE_TEXT_LAYOUT |
4980                                          EV_PAGE_DATA_INCLUDE_TEXT);
4981         }
4982         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4983         ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
4984         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4985 }
4986
4987 static void
4988 clear_caches (EvView *view)
4989 {
4990         if (view->pixbuf_cache) {
4991                 g_object_unref (view->pixbuf_cache);
4992                 view->pixbuf_cache = NULL;
4993         }
4994
4995         if (view->page_cache) {
4996                 g_object_unref (view->page_cache);
4997                 view->page_cache = NULL;
4998         }
4999 }
5000
5001 /**
5002  * ev_view_set_page_cache_size:
5003  * @view:
5004  * @cache_size:
5005  *
5006  * Sets the maximum size in bytes that will be used to cache
5007  * rendered pages. Use 0 to disable caching rendered pages.
5008  *
5009  * Note that this limit doesn't affect the current visible page range,
5010  * which will always be rendered. In order to limit the total memory used
5011  * you have to use ev_document_model_set_max_scale() too.
5012  *
5013  */
5014 void
5015 ev_view_set_page_cache_size (EvView *view,
5016                              gsize   cache_size)
5017 {
5018         if (view->pixbuf_cache_size == cache_size)
5019                 return;
5020
5021         view->pixbuf_cache_size = cache_size;
5022         if (view->pixbuf_cache)
5023                 ev_pixbuf_cache_set_max_size (view->pixbuf_cache, cache_size);
5024 }
5025
5026 void
5027 ev_view_set_loading (EvView       *view,
5028                      gboolean      loading)
5029 {
5030         if (view->loading && !loading)
5031                 hide_loading_window (view);
5032         view->loading = loading;
5033         gtk_widget_queue_draw (GTK_WIDGET (view));
5034 }
5035
5036 static gboolean
5037 ev_view_autoscroll_cb (EvView *view)
5038 {
5039         gdouble speed, value;
5040
5041         /* If the user stops autoscrolling, autoscrolling will be
5042          * set to false but the timeout will continue; stop the timeout: */
5043         if (!view->scroll_info.autoscrolling) {
5044                 view->scroll_info.timeout_id = 0;
5045                 return FALSE;
5046         }
5047
5048         if (view->scroll_info.last_y > view->scroll_info.start_y &&
5049                 (view->scroll_info.last_y < view->scroll_info.start_y))
5050                 return TRUE;
5051
5052         /* Replace 100 with your speed of choice: The lower the faster.
5053          * Replace 3 with another speed of choice: The higher, the faster it accelerated
5054          *      based on the distance of the starting point from the mouse
5055          * (All also effected by the timeout interval of this callback) */
5056
5057         if (view->scroll_info.start_y > view->scroll_info.last_y)
5058                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
5059         else
5060                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
5061
5062         value = gtk_adjustment_get_value (view->vadjustment);
5063         value = CLAMP (value + speed, 0,
5064                        gtk_adjustment_get_upper (view->vadjustment) -
5065                        gtk_adjustment_get_page_size (view->vadjustment));
5066         gtk_adjustment_set_value (view->vadjustment, value);
5067
5068         return TRUE;
5069
5070 }
5071
5072 void
5073 ev_view_autoscroll_start (EvView *view)
5074 {
5075         gint x, y;
5076
5077         g_return_if_fail (EV_IS_VIEW (view));
5078
5079         if (view->scroll_info.autoscrolling)
5080                 return;
5081
5082         view->scroll_info.autoscrolling = TRUE;
5083         view->scroll_info.timeout_id =
5084                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5085                                view);
5086
5087         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5088         ev_view_handle_cursor_over_xy (view, x, y);
5089 }
5090
5091 void
5092 ev_view_autoscroll_stop (EvView *view)
5093 {
5094         gint x, y;
5095
5096         g_return_if_fail (EV_IS_VIEW (view));
5097
5098         if (!view->scroll_info.autoscrolling)
5099                 return;
5100
5101         view->scroll_info.autoscrolling = FALSE;
5102         if (view->scroll_info.timeout_id) {
5103                 g_source_remove (view->scroll_info.timeout_id);
5104                 view->scroll_info.timeout_id = 0;
5105         }
5106
5107         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5108         ev_view_handle_cursor_over_xy (view, x, y);
5109 }
5110
5111 static void
5112 ev_view_document_changed_cb (EvDocumentModel *model,
5113                              GParamSpec      *pspec,
5114                              EvView          *view)
5115 {
5116         EvDocument *document = ev_document_model_get_document (model);
5117
5118         if (document != view->document) {
5119                 gint current_page;
5120
5121                 clear_caches (view);
5122
5123                 if (view->document) {
5124                         g_object_unref (view->document);
5125                 }
5126
5127                 view->document = document;
5128                 view->find_result = 0;
5129
5130                 if (view->document) {
5131                         view->loading = FALSE;
5132                         g_object_ref (view->document);
5133                         setup_caches (view);
5134                 }
5135
5136                 current_page = ev_document_model_get_page (model);
5137                 if (view->current_page != current_page) {
5138                         ev_view_change_page (view, current_page);
5139                 } else {
5140                         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
5141                         gtk_widget_queue_resize (GTK_WIDGET (view));
5142                 }
5143         }
5144 }
5145
5146 static void
5147 ev_view_rotation_changed_cb (EvDocumentModel *model,
5148                              GParamSpec      *pspec,
5149                              EvView          *view)
5150 {
5151         gint rotation = ev_document_model_get_rotation (model);
5152
5153         view->rotation = rotation;
5154
5155         if (view->pixbuf_cache) {
5156                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5157                 if (!ev_document_is_page_size_uniform (view->document))
5158                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5159                 gtk_widget_queue_resize (GTK_WIDGET (view));
5160         }
5161
5162         ev_view_remove_all (view);
5163
5164         if (rotation != 0)
5165                 clear_selection (view);
5166 }
5167
5168 static void
5169 ev_view_inverted_colors_changed_cb (EvDocumentModel *model,
5170                                     GParamSpec      *pspec,
5171                                     EvView          *view)
5172 {
5173         if (view->pixbuf_cache) {
5174                 gboolean inverted_colors;
5175
5176                 inverted_colors = ev_document_model_get_inverted_colors (model);
5177                 ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
5178                 gtk_widget_queue_draw (GTK_WIDGET (view));
5179         }
5180 }
5181
5182 static void
5183 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
5184                                 GParamSpec      *pspec,
5185                                 EvView          *view)
5186 {
5187         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
5188
5189         view->sizing_mode = mode;
5190         if (mode != EV_SIZING_FREE)
5191                 gtk_widget_queue_resize (GTK_WIDGET (view));
5192 }
5193
5194 #define EPSILON 0.0000001
5195 static void
5196 ev_view_scale_changed_cb (EvDocumentModel *model,
5197                           GParamSpec      *pspec,
5198                           EvView          *view)
5199 {
5200         gdouble scale = ev_document_model_get_scale (model);
5201
5202         if (ABS (view->scale - scale) < EPSILON)
5203                 return;
5204
5205         view->scale = scale;
5206
5207         view->pending_resize = TRUE;
5208         if (view->sizing_mode == EV_SIZING_FREE)
5209                 gtk_widget_queue_resize (GTK_WIDGET (view));
5210 }
5211
5212 static void
5213 ev_view_continuous_changed_cb (EvDocumentModel *model,
5214                                GParamSpec      *pspec,
5215                                EvView          *view)
5216 {
5217         gboolean continuous = ev_document_model_get_continuous (model);
5218
5219         view->continuous = continuous;
5220         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5221         gtk_widget_queue_resize (GTK_WIDGET (view));
5222 }
5223
5224 static void
5225 ev_view_dual_page_changed_cb (EvDocumentModel *model,
5226                               GParamSpec      *pspec,
5227                               EvView          *view)
5228 {
5229         gboolean dual_page = ev_document_model_get_dual_page (model);
5230
5231         view->dual_page = dual_page;
5232         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5233         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5234          * preload_cache_size to be 2 if dual_page is set.
5235          */
5236         gtk_widget_queue_resize (GTK_WIDGET (view));
5237 }
5238
5239 static void
5240 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
5241                                GParamSpec      *pspec,
5242                                EvView          *view)
5243 {
5244         gboolean fullscreen = ev_document_model_get_fullscreen (model);
5245
5246         view->fullscreen = fullscreen;
5247         gtk_widget_queue_resize (GTK_WIDGET (view));
5248 }
5249
5250 void
5251 ev_view_set_model (EvView          *view,
5252                    EvDocumentModel *model)
5253 {
5254         g_return_if_fail (EV_IS_VIEW (view));
5255         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
5256
5257         if (model == view->model)
5258                 return;
5259
5260         if (view->model) {
5261                 g_signal_handlers_disconnect_by_func (view->model,
5262                                                       ev_view_document_changed_cb,
5263                                                       view);
5264                 g_signal_handlers_disconnect_by_func (view->model,
5265                                                       ev_view_page_changed_cb,
5266                                                       view);
5267                 g_object_unref (view->model);
5268         }
5269         view->model = g_object_ref (model);
5270
5271         /* Initialize view from model */
5272         view->rotation = ev_document_model_get_rotation (view->model);
5273         view->sizing_mode = ev_document_model_get_sizing_mode (view->model);
5274         view->scale = ev_document_model_get_scale (view->model);
5275         view->continuous = ev_document_model_get_continuous (view->model);
5276         view->dual_page = ev_document_model_get_dual_page (view->model);
5277         view->fullscreen = ev_document_model_get_fullscreen (view->model);
5278         ev_view_document_changed_cb (view->model, NULL, view);
5279
5280         g_signal_connect (view->model, "notify::document",
5281                           G_CALLBACK (ev_view_document_changed_cb),
5282                           view);
5283         g_signal_connect (view->model, "notify::rotation",
5284                           G_CALLBACK (ev_view_rotation_changed_cb),
5285                           view);
5286         g_signal_connect (view->model, "notify::inverted-colors",
5287                           G_CALLBACK (ev_view_inverted_colors_changed_cb),
5288                           view);
5289         g_signal_connect (view->model, "notify::sizing-mode",
5290                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
5291                           view);
5292         g_signal_connect (view->model, "notify::scale",
5293                           G_CALLBACK (ev_view_scale_changed_cb),
5294                           view);
5295         g_signal_connect (view->model, "notify::continuous",
5296                           G_CALLBACK (ev_view_continuous_changed_cb),
5297                           view);
5298         g_signal_connect (view->model, "notify::dual-page",
5299                           G_CALLBACK (ev_view_dual_page_changed_cb),
5300                           view);
5301         g_signal_connect (view->model, "notify::fullscreen",
5302                           G_CALLBACK (ev_view_fullscreen_changed_cb),
5303                           view);
5304         g_signal_connect (view->model, "page-changed",
5305                           G_CALLBACK (ev_view_page_changed_cb),
5306                           view);
5307 }
5308
5309 static void
5310 ev_view_reload_page (EvView         *view,
5311                      gint            page,
5312                      cairo_region_t *region)
5313 {
5314         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5315                                      region,
5316                                      page,
5317                                      view->rotation,
5318                                      view->scale);
5319 }
5320
5321 void
5322 ev_view_reload (EvView *view)
5323 {
5324         ev_pixbuf_cache_clear (view->pixbuf_cache);
5325         view_update_range_and_current_page (view);
5326 }
5327
5328 /*** Zoom and sizing mode ***/
5329
5330 gboolean
5331 ev_view_can_zoom_in (EvView *view)
5332 {
5333         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
5334 }
5335
5336 gboolean
5337 ev_view_can_zoom_out (EvView *view)
5338 {
5339         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
5340 }
5341
5342 void
5343 ev_view_zoom_in (EvView *view)
5344 {
5345         gdouble scale;
5346
5347         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5348
5349         view->pending_scroll = SCROLL_TO_CENTER;
5350         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
5351         ev_document_model_set_scale (view->model, scale);
5352 }
5353
5354 void
5355 ev_view_zoom_out (EvView *view)
5356 {
5357         gdouble scale;
5358
5359         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5360
5361         view->pending_scroll = SCROLL_TO_CENTER;
5362         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5363         ev_document_model_set_scale (view->model, scale);
5364 }
5365
5366 static double
5367 zoom_for_size_fit_width (gdouble doc_width,
5368                          gdouble doc_height,
5369                          int     target_width,
5370                          int     target_height)
5371 {
5372         return (double)target_width / doc_width;
5373 }
5374
5375 static double
5376 zoom_for_size_fit_height (gdouble doc_width,
5377                           gdouble doc_height,
5378                           int     target_width,
5379                           int     target_height)
5380 {
5381         return (double)target_height / doc_height;
5382 }
5383
5384 static double
5385 zoom_for_size_best_fit (gdouble doc_width,
5386                         gdouble doc_height,
5387                         int     target_width,
5388                         int     target_height)
5389 {
5390         double w_scale;
5391         double h_scale;
5392
5393         w_scale = (double)target_width / doc_width;
5394         h_scale = (double)target_height / doc_height;
5395
5396         return MIN (w_scale, h_scale);
5397 }
5398
5399 static void
5400 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5401                                                 int     width,
5402                                                 int     height)
5403 {
5404         gdouble doc_width, doc_height;
5405         GtkBorder border;
5406         gdouble scale;
5407         gint sb_size;
5408
5409         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5410         if (view->rotation == 90 || view->rotation == 270) {
5411                 gdouble tmp;
5412
5413                 tmp = doc_width;
5414                 doc_width = doc_height;
5415                 doc_height = tmp;
5416         }
5417
5418         compute_border (view, doc_width, doc_height, &border);
5419
5420         doc_width *= 2;
5421         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5422         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5423
5424         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5425
5426         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5427                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5428         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5429                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5430         else
5431                 g_assert_not_reached ();
5432
5433         ev_document_model_set_scale (view->model, scale);
5434 }
5435
5436 static void
5437 ev_view_zoom_for_size_continuous (EvView *view,
5438                                   int     width,
5439                                   int     height)
5440 {
5441         gdouble doc_width, doc_height;
5442         GtkBorder border;
5443         gdouble scale;
5444         gint sb_size;
5445
5446         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5447         if (view->rotation == 90 || view->rotation == 270) {
5448                 gdouble tmp;
5449
5450                 tmp = doc_width;
5451                 doc_width = doc_height;
5452                 doc_height = tmp;
5453         }
5454
5455         compute_border (view, doc_width, doc_height, &border);
5456
5457         width -= (border.left + border.right + 2 * view->spacing);
5458         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5459
5460         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5461
5462         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5463                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5464         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5465                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5466         else
5467                 g_assert_not_reached ();
5468
5469         ev_document_model_set_scale (view->model, scale);
5470 }
5471
5472 static void
5473 ev_view_zoom_for_size_dual_page (EvView *view,
5474                                  int     width,
5475                                  int     height)
5476 {
5477         GtkBorder border;
5478         gdouble doc_width, doc_height;
5479         gdouble scale;
5480         gint other_page;
5481
5482         other_page = view->current_page ^ 1;
5483
5484         /* Find the largest of the two. */
5485         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5486         if (other_page < ev_document_get_n_pages (view->document)) {
5487                 gdouble width_2, height_2;
5488
5489                 get_doc_page_size (view, other_page, &width_2, &height_2);
5490                 if (width_2 > doc_width)
5491                         doc_width = width_2;
5492                 if (height_2 > doc_height)
5493                         doc_height = height_2;
5494         }
5495         compute_border (view, width, height, &border);
5496
5497         doc_width = doc_width * 2;
5498         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5499         height -= (border.top + border.bottom + 2 * view->spacing);
5500
5501         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5502                 gint sb_size;
5503
5504                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5505                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5506         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5507                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5508         else
5509                 g_assert_not_reached ();
5510
5511         ev_document_model_set_scale (view->model, scale);
5512 }
5513
5514 static void
5515 ev_view_zoom_for_size_single_page (EvView *view,
5516                                    int     width,
5517                                    int     height)
5518 {
5519         gdouble doc_width, doc_height;
5520         GtkBorder border;
5521         gdouble scale;
5522
5523         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5524
5525         /* Get an approximate border */
5526         compute_border (view, width, height, &border);
5527
5528         width -= (border.left + border.right + 2 * view->spacing);
5529         height -= (border.top + border.bottom + 2 * view->spacing);
5530
5531         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5532                 gint sb_size;
5533
5534                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5535                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5536         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5537                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5538         else
5539                 g_assert_not_reached ();
5540
5541         ev_document_model_set_scale (view->model, scale);
5542 }
5543
5544 static void
5545 ev_view_zoom_for_size (EvView *view,
5546                        int     width,
5547                        int     height)
5548 {
5549         g_return_if_fail (EV_IS_VIEW (view));
5550         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5551                           view->sizing_mode == EV_SIZING_BEST_FIT);
5552         g_return_if_fail (width >= 0);
5553         g_return_if_fail (height >= 0);
5554
5555         if (view->document == NULL)
5556                 return;
5557
5558         if (view->continuous && view->dual_page)
5559                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5560         else if (view->continuous)
5561                 ev_view_zoom_for_size_continuous (view, width, height);
5562         else if (view->dual_page)
5563                 ev_view_zoom_for_size_dual_page (view, width, height);
5564         else
5565                 ev_view_zoom_for_size_single_page (view, width, height);
5566 }
5567
5568 /*** Find ***/
5569 static gint
5570 ev_view_find_get_n_results (EvView *view, gint page)
5571 {
5572         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5573 }
5574
5575 static EvRectangle *
5576 ev_view_find_get_result (EvView *view, gint page, gint result)
5577 {
5578         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5579 }
5580
5581 static void
5582 jump_to_find_result (EvView *view)
5583 {
5584         gint n_results;
5585         gint page = view->current_page;
5586
5587         n_results = ev_view_find_get_n_results (view, page);
5588
5589         if (n_results > 0 && view->find_result < n_results) {
5590                 EvRectangle *rect;
5591                 GdkRectangle view_rect;
5592
5593                 rect = ev_view_find_get_result (view, page, view->find_result);
5594                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5595                 ensure_rectangle_is_visible (view, &view_rect);
5596                 view->jump_to_find_result = FALSE;
5597         }
5598 }
5599
5600 /**
5601  * jump_to_find_page
5602  * @view: #EvView instance
5603  * @direction: Direction to look
5604  * @shift: Shift from current page
5605  *
5606  * Jumps to the first page that has occurences of searched word.
5607  * Uses a direction where to look and a shift from current page.
5608  *
5609  */
5610 static void
5611 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5612 {
5613         int n_pages, i;
5614
5615         n_pages = ev_document_get_n_pages (view->document);
5616
5617         for (i = 0; i < n_pages; i++) {
5618                 int page;
5619
5620                 if (direction == EV_VIEW_FIND_NEXT)
5621                         page = view->current_page + i;
5622                 else
5623                         page = view->current_page - i;
5624                 page += shift;
5625
5626                 if (page >= n_pages) {
5627                         page = page - n_pages;
5628                 } else if (page < 0)
5629                         page = page + n_pages;
5630
5631                 if (ev_view_find_get_n_results (view, page) > 0) {
5632                         ev_document_model_set_page (view->model, page);
5633                         break;
5634                 }
5635         }
5636 }
5637
5638 void
5639 ev_view_find_changed (EvView *view, GList **results, gint page)
5640 {
5641         view->find_pages = results;
5642
5643         if (view->jump_to_find_result == TRUE) {
5644                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5645                 jump_to_find_result (view);
5646         }
5647
5648         if (view->current_page == page)
5649                 gtk_widget_queue_draw (GTK_WIDGET (view));
5650 }
5651
5652 void
5653 ev_view_find_next (EvView *view)
5654 {
5655         gint n_results;
5656
5657         n_results = ev_view_find_get_n_results (view, view->current_page);
5658         view->find_result++;
5659
5660         if (view->find_result >= n_results) {
5661                 view->find_result = 0;
5662                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5663                 jump_to_find_result (view);
5664         } else {
5665                 jump_to_find_result (view);
5666                 gtk_widget_queue_draw (GTK_WIDGET (view));
5667         }
5668 }
5669
5670 void
5671 ev_view_find_previous (EvView *view)
5672 {
5673         view->find_result--;
5674
5675         if (view->find_result < 0) {
5676                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5677                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5678                 jump_to_find_result (view);
5679         } else {
5680                 jump_to_find_result (view);
5681                 gtk_widget_queue_draw (GTK_WIDGET (view));
5682         }
5683 }
5684
5685 void
5686 ev_view_find_search_changed (EvView *view)
5687 {
5688         /* search string has changed, focus on new search result */
5689         view->jump_to_find_result = TRUE;
5690         view->find_pages = NULL;
5691 }
5692
5693 void
5694 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5695 {
5696         view->highlight_find_results = value;
5697         gtk_widget_queue_draw (GTK_WIDGET (view));
5698 }
5699
5700 void
5701 ev_view_find_cancel (EvView *view)
5702 {
5703         view->find_pages = NULL;
5704 }
5705
5706 /*** Synctex ***/
5707 void
5708 ev_view_highlight_forward_search (EvView       *view,
5709                                   EvSourceLink *link)
5710 {
5711         EvMapping   *mapping;
5712         gint         page;
5713         GdkRectangle view_rect;
5714
5715         if (!ev_document_has_synctex (view->document))
5716                 return;
5717
5718         mapping = ev_document_synctex_forward_search (view->document, link);
5719         if (!mapping)
5720                 return;
5721
5722         if (view->synctex_result)
5723                 g_free (view->synctex_result);
5724         view->synctex_result = mapping;
5725
5726         page = GPOINTER_TO_INT (mapping->data);
5727         ev_document_model_set_page (view->model, page);
5728
5729         doc_rect_to_view_rect (view, page, &mapping->area, &view_rect);
5730         ensure_rectangle_is_visible (view, &view_rect);
5731         gtk_widget_queue_draw (GTK_WIDGET (view));
5732 }
5733
5734 /*** Selections ***/
5735
5736 /* compute_new_selection_rect/text calculates the area currently selected by
5737  * view_rect.  each handles a different mode;
5738  */
5739 static GList *
5740 compute_new_selection_rect (EvView       *view,
5741                             GdkPoint     *start,
5742                             GdkPoint     *stop)
5743 {
5744         GdkRectangle view_rect;
5745         int n_pages, i;
5746         GList *list = NULL;
5747
5748         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5749
5750         view_rect.x = MIN (start->x, stop->x);
5751         view_rect.y = MIN (start->y, stop->y);
5752         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5753         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5754
5755         n_pages = ev_document_get_n_pages (view->document);
5756
5757         for (i = 0; i < n_pages; i++) {
5758                 GdkRectangle page_area;
5759                 GtkBorder border;
5760
5761                 if (ev_view_get_page_extents (view, i, &page_area, &border)) {
5762                         GdkRectangle overlap;
5763
5764                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5765                                 EvViewSelection *selection;
5766
5767                                 selection = g_new0 (EvViewSelection, 1);
5768                                 selection->page = i;
5769                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5770                                                        &(selection->rect));
5771
5772                                 list = g_list_append (list, selection);
5773                         }
5774                 }
5775         }
5776
5777         return list;
5778 }
5779
5780 static gboolean
5781 gdk_rectangle_point_in (GdkRectangle *rectangle,
5782                         GdkPoint     *point)
5783 {
5784         return rectangle->x <= point->x &&
5785                 rectangle->y <= point->y &&
5786                 point->x < rectangle->x + rectangle->width &&
5787                 point->y < rectangle->y + rectangle->height;
5788 }
5789
5790 static GList *
5791 compute_new_selection_text (EvView          *view,
5792                             EvSelectionStyle style,
5793                             GdkPoint        *start,
5794                             GdkPoint        *stop)
5795 {
5796         int n_pages, i, first, last;
5797         GList *list = NULL;
5798         EvViewSelection *selection;
5799         gdouble width, height;
5800         int start_page, end_page;
5801
5802         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5803
5804         n_pages = ev_document_get_n_pages (view->document);
5805
5806         /* First figure out the range of pages the selection
5807          * affects. */
5808         first = n_pages;
5809         last = 0;
5810         if (view->continuous) {
5811                 start_page = 0;
5812                 end_page = n_pages;
5813         } else if (view->dual_page) {
5814                 start_page = view->start_page;
5815                 end_page = view->end_page + 1;
5816         } else {
5817                 start_page = view->current_page;
5818                 end_page = view->current_page + 1;
5819         }
5820
5821         for (i = start_page; i < end_page; i++) {
5822                 GdkRectangle page_area;
5823                 GtkBorder border;
5824
5825                 ev_view_get_page_extents (view, i, &page_area, &border);
5826                 if (gdk_rectangle_point_in (&page_area, start) ||
5827                     gdk_rectangle_point_in (&page_area, stop)) {
5828                         if (first == n_pages)
5829                                 first = i;
5830                         last = i;
5831                 }
5832
5833         }
5834
5835         /* Now create a list of EvViewSelection's for the affected
5836          * pages.  This could be an empty list, a list of just one
5837          * page or a number of pages.*/
5838         for (i = first; i < last + 1; i++) {
5839                 GdkRectangle page_area;
5840                 GtkBorder border;
5841                 GdkPoint *point;
5842
5843                 get_doc_page_size (view, i, &width, &height);
5844
5845                 selection = g_new0 (EvViewSelection, 1);
5846                 selection->page = i;
5847                 selection->style = style;
5848                 selection->rect.x1 = selection->rect.y1 = 0;
5849                 selection->rect.x2 = width;
5850                 selection->rect.y2 = height;
5851
5852                 ev_view_get_page_extents (view, i, &page_area, &border);
5853
5854                 if (gdk_rectangle_point_in (&page_area, start))
5855                         point = start;
5856                 else
5857                         point = stop;
5858
5859                 if (i == first)
5860                         view_point_to_doc_point (view, point, &page_area,
5861                                                  &selection->rect.x1,
5862                                                  &selection->rect.y1);
5863
5864                 /* If the selection is contained within just one page,
5865                  * make sure we don't write 'start' into both points
5866                  * in selection->rect. */
5867                 if (first == last)
5868                         point = stop;
5869
5870                 if (i == last)
5871                         view_point_to_doc_point (view, point, &page_area,
5872                                                  &selection->rect.x2,
5873                                                  &selection->rect.y2);
5874
5875                 list = g_list_append (list, selection);
5876         }
5877
5878         return list;
5879 }
5880
5881 /* This function takes the newly calculated list, and figures out which regions
5882  * have changed.  It then queues a redraw approporiately.
5883  */
5884 static void
5885 merge_selection_region (EvView *view,
5886                         GList  *new_list)
5887 {
5888         GList *old_list;
5889         GList *new_list_ptr, *old_list_ptr;
5890
5891         /* Update the selection */
5892         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5893         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5894         g_list_free (view->selection_info.selections);
5895         view->selection_info.selections = new_list;
5896         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5897         g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
5898
5899         new_list_ptr = new_list;
5900         old_list_ptr = old_list;
5901
5902         while (new_list_ptr || old_list_ptr) {
5903                 EvViewSelection *old_sel, *new_sel;
5904                 int cur_page;
5905                 cairo_region_t *region = NULL;
5906
5907                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5908                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5909
5910                 /* Assume that the lists are in order, and we run through them
5911                  * comparing them, one page at a time.  We come out with the
5912                  * first page we see. */
5913                 if (new_sel && old_sel) {
5914                         if (new_sel->page < old_sel->page) {
5915                                 new_list_ptr = new_list_ptr->next;
5916                                 old_sel = NULL;
5917                         } else if (new_sel->page > old_sel->page) {
5918                                 old_list_ptr = old_list_ptr->next;
5919                                 new_sel = NULL;
5920                         } else {
5921                                 new_list_ptr = new_list_ptr->next;
5922                                 old_list_ptr = old_list_ptr->next;
5923                         }
5924                 } else if (new_sel) {
5925                         new_list_ptr = new_list_ptr->next;
5926                 } else if (old_sel) {
5927                         old_list_ptr = old_list_ptr->next;
5928                 }
5929
5930                 g_assert (new_sel || old_sel);
5931
5932                 /* is the page we're looking at on the screen?*/
5933                 cur_page = new_sel ? new_sel->page : old_sel->page;
5934                 if (cur_page < view->start_page || cur_page > view->end_page)
5935                         continue;
5936
5937                 /* seed the cache with a new page.  We are going to need the new
5938                  * region too. */
5939                 if (new_sel) {
5940                         cairo_region_t *tmp_region = NULL;
5941
5942                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5943                                                                cur_page,
5944                                                                view->scale,
5945                                                                &tmp_region);
5946
5947                         if (tmp_region && !cairo_region_is_empty (tmp_region)) {
5948                                 new_sel->covered_region = cairo_region_reference (tmp_region);
5949                         }
5950                 }
5951
5952                 /* Now we figure out what needs redrawing */
5953                 if (old_sel && new_sel) {
5954                         if (old_sel->covered_region && new_sel->covered_region) {
5955                                 /* We only want to redraw the areas that have
5956                                  * changed, so we xor the old and new regions
5957                                  * and redraw if it's different */
5958                                 region = cairo_region_copy (old_sel->covered_region);
5959 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 9, 12)
5960                                 cairo_region_xor (region, new_sel->covered_region);
5961 #else
5962                                 cairo_region_t *tbr;
5963                                 tbr = cairo_region_copy (new_sel->covered_region);
5964
5965                                 /* xor old_sel, new_sel*/
5966                                 cairo_region_subtract (tbr, region);
5967                                 cairo_region_subtract (region, new_sel->covered_region);
5968                                 cairo_region_union (region, tbr);
5969                                 cairo_region_destroy (tbr);
5970 #endif
5971
5972                                 if (cairo_region_is_empty (region)) {
5973                                         cairo_region_destroy (region);
5974                                         region = NULL;
5975                                 } else {
5976                                         gint num_rectangles = cairo_region_num_rectangles (region);
5977                                         GdkRectangle r;
5978
5979                                         /* We need to make the damage region a little bigger
5980                                          * because the edges of the old selection might change
5981                                          */
5982                                         cairo_region_get_rectangle (region, 0, &r);
5983                                         r.x -= 5;
5984                                         r.width = 5;
5985                                         cairo_region_union_rectangle (region, &r);
5986
5987                                         cairo_region_get_rectangle (region, num_rectangles - 1, &r);
5988                                         r.x += r.width;
5989                                         r.width = 5;
5990                                         cairo_region_union_rectangle (region, &r);
5991                                 }
5992                         } else if (old_sel->covered_region) {
5993                                 region = cairo_region_copy (old_sel->covered_region);
5994                         } else if (new_sel->covered_region) {
5995                                 region = cairo_region_copy (new_sel->covered_region);
5996                         }
5997                 } else if (old_sel && !new_sel) {
5998                         if (old_sel->covered_region && !cairo_region_is_empty (old_sel->covered_region)) {
5999                                 region = cairo_region_copy (old_sel->covered_region);
6000                         }
6001                 } else if (!old_sel && new_sel) {
6002                         if (new_sel->covered_region && !cairo_region_is_empty (new_sel->covered_region)) {
6003                                 region = cairo_region_copy (new_sel->covered_region);
6004                         }
6005                 } else {
6006                         g_assert_not_reached ();
6007                 }
6008
6009                 /* Redraw the damaged region! */
6010                 if (region) {
6011                         GdkRectangle page_area;
6012                         GtkBorder    border;
6013
6014                         ev_view_get_page_extents (view, cur_page, &page_area, &border);
6015                         cairo_region_translate (region,
6016                                            page_area.x + border.left - view->scroll_x,
6017                                            page_area.y + border.top - view->scroll_y);
6018                         gdk_window_invalidate_region (gtk_widget_get_window (GTK_WIDGET (view)), region, TRUE);
6019                         cairo_region_destroy (region);
6020                 }
6021         }
6022
6023         /* Free the old list, now that we're done with it. */
6024         g_list_foreach (old_list, (GFunc) selection_free, NULL);
6025         g_list_free (old_list);
6026 }
6027
6028 static void
6029 compute_selections (EvView          *view,
6030                     EvSelectionStyle style,
6031                     GdkPoint        *start,
6032                     GdkPoint        *stop)
6033 {
6034         GList *list;
6035
6036         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
6037                 list = compute_new_selection_rect (view, start, stop);
6038         else
6039                 list = compute_new_selection_text (view, style, start, stop);
6040         merge_selection_region (view, list);
6041 }
6042
6043 /* Free's the selection.  It's up to the caller to queue redraws if needed.
6044  */
6045 static void
6046 selection_free (EvViewSelection *selection)
6047 {
6048         if (selection->covered_region)
6049                 cairo_region_destroy (selection->covered_region);
6050         g_free (selection);
6051 }
6052
6053 static void
6054 clear_selection (EvView *view)
6055 {
6056         if (view->selection_info.selections) {
6057                 g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6058                 g_list_free (view->selection_info.selections);
6059                 view->selection_info.selections = NULL;
6060
6061                 g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
6062         }
6063         view->selection_info.in_selection = FALSE;
6064         if (view->pixbuf_cache)
6065                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6066 }
6067
6068 void
6069 ev_view_select_all (EvView *view)
6070 {
6071         GList *selections = NULL;
6072         int n_pages, i;
6073
6074         /* Disable selection on rotated pages for the 0.4.0 series */
6075         if (view->rotation != 0)
6076                 return;
6077
6078         clear_selection (view);
6079
6080         n_pages = ev_document_get_n_pages (view->document);
6081         for (i = 0; i < n_pages; i++) {
6082                 gdouble width, height;
6083                 EvViewSelection *selection;
6084
6085                 get_doc_page_size (view, i, &width, &height);
6086
6087                 selection = g_new0 (EvViewSelection, 1);
6088                 selection->page = i;
6089                 selection->style = EV_SELECTION_STYLE_GLYPH;
6090                 selection->rect.x1 = selection->rect.y1 = 0;
6091                 selection->rect.x2 = width;
6092                 selection->rect.y2 = height;
6093
6094                 selections = g_list_append (selections, selection);
6095         }
6096
6097         merge_selection_region (view, selections);
6098         gtk_widget_queue_draw (GTK_WIDGET (view));
6099 }
6100
6101 gboolean
6102 ev_view_get_has_selection (EvView *view)
6103 {
6104         return view->selection_info.selections != NULL;
6105 }
6106
6107 static char *
6108 get_selected_text (EvView *view)
6109 {
6110         GString *text;
6111         GList *l;
6112         gchar *normalized_text;
6113
6114         text = g_string_new (NULL);
6115
6116         ev_document_doc_mutex_lock ();
6117
6118         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6119                 EvViewSelection *selection = (EvViewSelection *)l->data;
6120                 EvPage *page;
6121                 gchar *tmp;
6122
6123                 page = ev_document_get_page (view->document, selection->page);
6124                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6125                                                       page, selection->style,
6126                                                       &(selection->rect));
6127                 g_object_unref (page);
6128                 g_string_append (text, tmp);
6129                 g_free (tmp);
6130         }
6131
6132         ev_document_doc_mutex_unlock ();
6133
6134         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6135         g_string_free (text, TRUE);
6136         return normalized_text;
6137 }
6138
6139 static void
6140 ev_view_clipboard_copy (EvView      *view,
6141                         const gchar *text)
6142 {
6143         GtkClipboard *clipboard;
6144
6145         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6146                                               GDK_SELECTION_CLIPBOARD);
6147         gtk_clipboard_set_text (clipboard, text, -1);
6148 }
6149
6150 void
6151 ev_view_copy (EvView *ev_view)
6152 {
6153         char *text;
6154
6155         if (!EV_IS_SELECTION (ev_view->document))
6156                 return;
6157
6158         text = get_selected_text (ev_view);
6159         ev_view_clipboard_copy (ev_view, text);
6160         g_free (text);
6161 }
6162
6163 static void
6164 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6165                         GtkSelectionData *selection_data,
6166                         guint             info,
6167                         gpointer          data)
6168 {
6169         EvView *ev_view = EV_VIEW (data);
6170
6171         if (ev_view->link_selected) {
6172                 gtk_selection_data_set_text (selection_data,
6173                                              ev_link_action_get_uri (ev_view->link_selected),
6174                                              -1);
6175         } else if (EV_IS_SELECTION (ev_view->document) &&
6176                    ev_view->selection_info.selections) {
6177                 gchar *text;
6178
6179                 text = get_selected_text (ev_view);
6180                 if (text) {
6181                         gtk_selection_data_set_text (selection_data, text, -1);
6182                         g_free (text);
6183                 }
6184         }
6185 }
6186
6187 static void
6188 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6189                           gpointer      data)
6190 {
6191         EvView *view = EV_VIEW (data);
6192
6193         clear_selection (view);
6194         clear_link_selected (view);
6195 }
6196
6197 static void
6198 ev_view_update_primary_selection (EvView *ev_view)
6199 {
6200         GtkClipboard *clipboard;
6201
6202         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6203                                               GDK_SELECTION_PRIMARY);
6204
6205         if (ev_view->selection_info.selections || ev_view->link_selected) {
6206                 GtkTargetList *target_list;
6207                 GtkTargetEntry *targets;
6208                 int n_targets;
6209
6210                 target_list = gtk_target_list_new (NULL, 0);
6211                 gtk_target_list_add_text_targets (target_list, 0);
6212                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6213                 gtk_target_list_unref (target_list);
6214
6215                 if (!gtk_clipboard_set_with_owner (clipboard,
6216                                                    targets, n_targets,
6217                                                    ev_view_primary_get_cb,
6218                                                    ev_view_primary_clear_cb,
6219                                                    G_OBJECT (ev_view)))
6220                         ev_view_primary_clear_cb (clipboard, ev_view);
6221
6222                 gtk_target_table_free (targets, n_targets);
6223         } else {
6224                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6225                         gtk_clipboard_clear (clipboard);
6226         }
6227 }
6228
6229 static void
6230 clear_link_selected (EvView *view)
6231 {
6232         if (view->link_selected) {
6233                 g_object_unref (view->link_selected);
6234                 view->link_selected = NULL;
6235         }
6236 }
6237
6238 void
6239 ev_view_copy_link_address (EvView       *view,
6240                            EvLinkAction *action)
6241 {
6242         clear_link_selected (view);
6243
6244         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6245
6246         view->link_selected = g_object_ref (action);
6247         ev_view_update_primary_selection (view);
6248 }
6249
6250 /*** Cursor operations ***/
6251 static void
6252 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6253 {
6254         GdkCursor *cursor = NULL;
6255         GtkWidget *widget;
6256         GdkWindow *window;
6257
6258         if (view->cursor == new_cursor) {
6259                 return;
6260         }
6261
6262         view->cursor = new_cursor;
6263
6264         window = gtk_widget_get_window (GTK_WIDGET (view));
6265         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6266         cursor = ev_view_cursor_new (gtk_widget_get_display (widget), new_cursor);
6267         gdk_window_set_cursor (window, cursor);
6268         gdk_flush ();
6269         if (cursor)
6270                 g_object_unref (cursor);
6271 }
6272
6273 void
6274 ev_view_hide_cursor (EvView *view)
6275 {
6276        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6277 }
6278
6279 void
6280 ev_view_show_cursor (EvView *view)
6281 {
6282        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6283 }
6284
6285 gboolean
6286 ev_view_next_page (EvView *view)
6287 {
6288         int page, n_pages;
6289
6290         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6291
6292         if (!view->document)
6293                 return FALSE;
6294
6295         page = ev_document_model_get_page (view->model);
6296         n_pages = ev_document_get_n_pages (view->document);
6297
6298         if (view->dual_page)
6299                 page = page + 2;
6300         else
6301                 page = page + 1;
6302
6303         if (page < n_pages) {
6304                 ev_document_model_set_page (view->model, page);
6305                 return TRUE;
6306         } else if (view->dual_page && page == n_pages) {
6307                 ev_document_model_set_page (view->model, page - 1);
6308                 return TRUE;
6309         } else {
6310                 return FALSE;
6311         }
6312 }
6313
6314 gboolean
6315 ev_view_previous_page (EvView *view)
6316 {
6317         int page;
6318
6319         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6320
6321         if (!view->document)
6322                 return FALSE;
6323
6324         page = ev_document_model_get_page (view->model);
6325
6326         if (view->dual_page)
6327                 page = page - 2;
6328         else
6329                 page = page - 1;
6330
6331         if (page >= 0) {
6332                 ev_document_model_set_page (view->model, page);
6333                 return TRUE;
6334         } else if (view->dual_page && page == -1) {
6335                 ev_document_model_set_page (view->model, 0);
6336                 return TRUE;
6337         } else {
6338                 return FALSE;
6339         }
6340 }
6341