libview/ev-view.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *  Copyright (C) 2004 Red Hat, Inc
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <math.h>
  25 #include <string.h>
  26
  27 #include <glib/gi18n-lib.h>
  28 #include <gtk/gtk.h>
  29 #include <gdk/gdkkeysyms.h>
  30
  31 #include "ev-mapping-list.h"
  32 #include "ev-document-forms.h"
  33 #include "ev-document-images.h"
  34 #include "ev-document-links.h"
  35 #include "ev-document-layers.h"
  36 #include "ev-document-misc.h"
  37 #include "ev-pixbuf-cache.h"
  38 #include "ev-page-cache.h"
  39 #include "ev-view-marshal.h"
  40 #include "ev-document-annotations.h"
  41 #include "ev-annotation-window.h"
  42 #include "ev-loading-window.h"
  43 #include "ev-view.h"
  44 #include "ev-view-accessible.h"
  45 #include "ev-view-private.h"
  46 #include "ev-view-type-builtins.h"
  47
  48 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  49 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  50 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  51
  52 enum {
  53         SIGNAL_BINDING_ACTIVATED,
  54         SIGNAL_HANDLE_LINK,
  55         SIGNAL_EXTERNAL_LINK,
  56         SIGNAL_POPUP_MENU,
  57         SIGNAL_SELECTION_CHANGED,
  58         SIGNAL_SYNC_SOURCE,
  59         SIGNAL_ANNOT_ADDED,
  60         SIGNAL_LAYERS_CHANGED,
  61         N_SIGNALS
  62 };
  63
  64 enum {
  65         TARGET_DND_URI,
  66         TARGET_DND_TEXT,
  67         TARGET_DND_IMAGE
  68 };
  69
  70 static guint signals[N_SIGNALS];
  71
  72 typedef enum {
  73         EV_VIEW_FIND_NEXT,
  74         EV_VIEW_FIND_PREV
  75 } EvViewFindDirection;
  76
  77 #define ZOOM_IN_FACTOR  1.2
  78 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  79
  80 #define SCROLL_TIME 150
  81
  82 /*** Scrolling ***/
  83 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  84                                                               GtkAdjustment      *hadjustment,
  85                                                               GtkAdjustment      *vadjustment);
  86 static void       view_update_range_and_current_page         (EvView             *view);
  87 static void       set_scroll_adjustment                      (EvView             *view,
  88                                                               GtkOrientation      orientation,
  89                                                               GtkAdjustment      *adjustment);
  90 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
  91                                                               guint               keyval,
  92                                                               GdkModifierType modifiers,
  93                                                               GtkScrollType       scroll,
  94                                                               gboolean            horizontal);
  95 static void       ensure_rectangle_is_visible                (EvView             *view,
  96                                                               GdkRectangle       *rect);
  97
  98 /*** Geometry computations ***/
  99 static void       compute_border                             (EvView             *view,
 100                                                               int                 width,
 101                                                               int                 height,
 102                                                               GtkBorder          *border);
 103 static void       get_page_y_offset                          (EvView             *view,
 104                                                               int                 page,
 105                                                               int                *y_offset);
 106 static void       view_rect_to_doc_rect                      (EvView             *view,
 107                                                               GdkRectangle       *view_rect,
 108                                                               GdkRectangle       *page_area,
 109                                                               EvRectangle        *doc_rect);
 110 static void       doc_rect_to_view_rect                      (EvView             *view,
 111                                                               int                 page,
 112                                                               EvRectangle        *doc_rect,
 113                                                               GdkRectangle       *view_rect);
 114 static gboolean   get_dual_even_left                         (EvView             *view);
 115 static void       find_page_at_location                      (EvView             *view,
 116                                                               gdouble             x,
 117                                                               gdouble             y,
 118                                                               gint               *page,
 119                                                               gint               *x_offset,
 120                                                               gint               *y_offset);
 121 static void       doc_point_to_view_point                    (EvView             *view,
 122                                                               int                 page,
 123                                                               EvPoint            *doc_point,
 124                                                               GdkPoint           *view_point);
 125 /*** Hyperrefs ***/
 126 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 127                                                               gdouble             x,
 128                                                               gdouble             y);
 129 static char*      tip_from_link                              (EvView             *view,
 130                                                               EvLink             *link);
 131 /*** Forms ***/
 132 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 133                                                                gdouble            x,
 134                                                                gdouble            y);
 135
 136 /*** Annotations ***/
 137 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 138                                                               gdouble             x,
 139                                                               gdouble             y);
 140 static void          show_annotation_windows                 (EvView             *view,
 141                                                               gint                page);
 142 static void          hide_annotation_windows                 (EvView             *view,
 143                                                               gint                page);
 144 /*** GtkWidget implementation ***/
 145 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 146                                                               GtkRequisition     *requisition);
 147 static void       ev_view_size_request_continuous            (EvView             *view,
 148                                                               GtkRequisition     *requisition);
 149 static void       ev_view_size_request_dual_page             (EvView             *view,
 150                                                               GtkRequisition     *requisition);
 151 static void       ev_view_size_request_single_page           (EvView             *view,
 152                                                               GtkRequisition     *requisition);
 153 static void       ev_view_size_request                       (GtkWidget          *widget,
 154                                                               GtkRequisition     *requisition);
 155 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 156                                                               GtkAllocation      *allocation);
 157 static void       ev_view_realize                            (GtkWidget          *widget);
 158 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 159                                                               GdkEventScroll     *event);
 160 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 161                                                               GdkEventExpose     *event);
 162 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 163 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 164                                                               GdkEventButton     *event);
 165 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 166                                                               GdkEventMotion     *event);
 167 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 168                                                               GdkEventButton     *event);
 169 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 170                                                               GdkEventCrossing   *event);
 171 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 172                                                               GdkEventCrossing   *event);
 173 static void       ev_view_style_set                          (GtkWidget          *widget,
 174                                                               GtkStyle           *old_style);
 175 static void       ev_view_remove_all                         (EvView             *view);
 176
 177 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 178
 179 /*** Drawing ***/
 180 static void       highlight_find_results                     (EvView             *view,
 181                                                               int                 page);
 182 static void       highlight_forward_search_results           (EvView             *view,
 183                                                               int                 page);
 184 static void       focus_annotation                           (EvView             *view,
 185                                                               int                 page,
 186                                                               GdkRectangle       *clip);
 187 static void       draw_one_page                              (EvView             *view,
 188                                                               gint                page,
 189                                                               cairo_t            *cr,
 190                                                               GdkRectangle       *page_area,
 191                                                               GtkBorder          *border,
 192                                                               GdkRectangle       *expose_area,
 193                                                               gboolean           *page_ready);
 194 static void       show_loading_window                        (EvView             *view);
 195 static void       hide_loading_window                        (EvView             *view);
 196 static void       ev_view_reload_page                        (EvView             *view,
 197                                                               gint                page,
 198                                                               cairo_region_t     *region);
 199 static void       ev_view_loading_window_move                (EvView             *view);
 200
 201 /*** Callbacks ***/
 202 static void       ev_view_change_page                        (EvView             *view,
 203                                                               gint                new_page);
 204 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 205                                                               cairo_region_t     *region,
 206                                                               EvView             *view);
 207 static void       ev_view_page_changed_cb                    (EvDocumentModel    *model,
 208                                                               gint                old_page,
 209                                                               gint                new_page,
 210                                                               EvView             *view);
 211 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 212                                                               EvView             *view);
 213
 214 /*** GObject ***/
 215 static void       ev_view_finalize                           (GObject            *object);
 216 static void       ev_view_destroy                            (GtkObject          *object);
 217 static void       ev_view_class_init                         (EvViewClass        *class);
 218 static void       ev_view_init                               (EvView             *view);
 219
 220 /*** Zoom and sizing ***/
 221 static double   zoom_for_size_fit_width                      (gdouble doc_width,
 222                                                               gdouble doc_height,
 223                                                               int     target_width,
 224                                                               int     target_height);
 225 static double   zoom_for_size_fit_height                     (gdouble doc_width,
 226                                                               gdouble doc_height,
 227                                                               int     target_width,
 228                                                               int     target_height);
 229 static double   zoom_for_size_best_fit                       (gdouble doc_width,
 230                                                               gdouble doc_height,
 231                                                               int     target_width,
 232                                                               int     target_height);
 233 static void     ev_view_zoom_for_size                        (EvView *view,
 234                                                               int     width,
 235                                                               int     height);
 236 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 237                                                                 int     width,
 238                                                                 int     height);
 239 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 240                                                                 int     width,
 241                                                                 int     height);
 242 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 243                                                                 int     width,
 244                                                                 int     height);
 245 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 246                                                                 int     width,
 247                                                                 int     height);
 248 /*** Cursors ***/
 249 static void       ev_view_set_cursor                         (EvView             *view,
 250                                                               EvViewCursor        new_cursor);
 251 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 252                                                               gint x,
 253                                                               gint y);
 254
 255 /*** Find ***/
 256 static gint         ev_view_find_get_n_results               (EvView             *view,
 257                                                               gint                page);
 258 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 259                                                               gint                page,
 260                                                               gint                result);
 261 static void       jump_to_find_result                        (EvView             *view);
 262 static void       jump_to_find_page                          (EvView             *view,
 263                                                               EvViewFindDirection direction,
 264                                                               gint                shift);
 265 /*** Selection ***/
 266 static void       compute_selections                         (EvView             *view,
 267                                                               EvSelectionStyle    style,
 268                                                               GdkPoint           *start,
 269                                                               GdkPoint           *stop);
 270 static void       clear_selection                            (EvView             *view);
 271 static void       clear_link_selected                        (EvView             *view);
 272 static void       selection_free                             (EvViewSelection    *selection);
 273 static char*      get_selected_text                          (EvView             *ev_view);
 274 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 275                                                               GtkSelectionData   *selection_data,
 276                                                               guint               info,
 277                                                               gpointer            data);
 278 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 279                                                               gpointer            data);
 280 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 281
 282 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 283
 284 /* HeightToPage cache */
 285 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 286
 287 static void
 288 build_height_to_page (EvHeightToPageCache *cache,
 289                       EvDocument          *document,
 290                       gint                 rotation)
 291 {
 292         gboolean swap, uniform, dual_even_left;
 293         int i;
 294         double uniform_height, page_height, next_page_height;
 295         double saved_height;
 296         gdouble u_width, u_height;
 297         gint n_pages;
 298
 299         swap = (rotation == 90 || rotation == 270);
 300
 301         uniform = ev_document_is_page_size_uniform (document);
 302         n_pages = ev_document_get_n_pages (document);
 303         dual_even_left = (n_pages > 2);
 304
 305         g_free (cache->height_to_page);
 306         g_free (cache->dual_height_to_page);
 307
 308         cache->rotation = rotation;
 309         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 310         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 311
 312         if (uniform)
 313                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 314
 315         saved_height = 0;
 316         for (i = 0; i <= n_pages; i++) {
 317                 if (uniform) {
 318                         uniform_height = swap ? u_width : u_height;
 319                         cache->height_to_page[i] = i * uniform_height;
 320                 } else {
 321                         if (i < n_pages) {
 322                                 gdouble w, h;
 323
 324                                 ev_document_get_page_size (document, i, &w, &h);
 325                                 page_height = swap ? w : h;
 326                         } else {
 327                                 page_height = 0;
 328                         }
 329                         cache->height_to_page[i] = saved_height;
 330                         saved_height += page_height;
 331                 }
 332         }
 333
 334         if (dual_even_left && !uniform) {
 335                 gdouble w, h;
 336
 337                 ev_document_get_page_size (document, 0, &w, &h);
 338                 saved_height = swap ? w : h;
 339         } else {
 340                 saved_height = 0;
 341         }
 342
 343         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 344                 if (uniform) {
 345                         uniform_height = swap ? u_width : u_height;
 346                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 347                         if (i + 1 < n_pages + 2)
 348                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 349                 } else {
 350                         if (i + 1 < n_pages) {
 351                                 gdouble w, h;
 352
 353                                 ev_document_get_page_size (document, i + 1, &w, &h);
 354                                 next_page_height = swap ? w : h;
 355                         } else {
 356                                 next_page_height = 0;
 357                         }
 358
 359                         if (i < n_pages) {
 360                                 gdouble w, h;
 361
 362                                 ev_document_get_page_size (document, i, &w, &h);
 363                                 page_height = swap ? w : h;
 364                         } else {
 365                                 page_height = 0;
 366                         }
 367
 368                         if (i + 1 < n_pages + 2) {
 369                                 cache->dual_height_to_page[i] = saved_height;
 370                                 cache->dual_height_to_page[i + 1] = saved_height;
 371                                 saved_height += MAX(page_height, next_page_height);
 372                         } else {
 373                                 cache->dual_height_to_page[i] = saved_height;
 374                         }
 375                 }
 376         }
 377 }
 378
 379 static void
 380 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 381                                     EvDocument          *document,
 382                                     gint                 page,
 383                                     gint                 rotation,
 384                                     gdouble             *height,
 385                                     gdouble             *dual_height)
 386 {
 387         if (cache->rotation != rotation)
 388                 build_height_to_page (cache, document, rotation);
 389
 390         *height = cache->height_to_page[page];
 391         *dual_height = cache->dual_height_to_page[page];
 392 }
 393
 394 static void
 395 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 396 {
 397         if (cache->height_to_page) {
 398                 g_free (cache->height_to_page);
 399                 cache->height_to_page = NULL;
 400         }
 401
 402         if (cache->dual_height_to_page) {
 403                 g_free (cache->dual_height_to_page);
 404                 cache->dual_height_to_page = NULL;
 405         }
 406         g_free (cache);
 407 }
 408
 409 static EvHeightToPageCache *
 410 ev_view_get_height_to_page_cache (EvView *view)
 411 {
 412         EvHeightToPageCache *cache;
 413
 414         if (!view->document)
 415                 return NULL;
 416
 417         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 418         if (!cache) {
 419                 cache = g_new0 (EvHeightToPageCache, 1);
 420                 build_height_to_page (cache, view->document, view->rotation);
 421                 g_object_set_data_full (G_OBJECT (view->document),
 422                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 423                                         cache,
 424                                         (GDestroyNotify)ev_height_to_page_cache_free);
 425         }
 426
 427         return cache;
 428 }
 429
 430 static void
 431 ev_view_get_height_to_page (EvView *view,
 432                             gint    page,
 433                             gint   *height,
 434                             gint   *dual_height)
 435 {
 436         gdouble h, dh;
 437
 438         if (!view->height_to_page_cache)
 439                 return;
 440
 441         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 442                                             view->document,
 443                                             page,
 444                                             view->rotation,
 445                                             &h, &dh);
 446         if (height)
 447                 *height = (gint)(h * view->scale + 0.5);
 448
 449         if (dual_height)
 450                 *dual_height = (gint)(dh * view->scale + 0.5);
 451 }
 452
 453 static gint
 454 ev_view_get_scrollbar_size (EvView        *view,
 455                             GtkOrientation orientation)
 456 {
 457         GtkWidget *widget = GTK_WIDGET (view);
 458         GtkWidget *sb;
 459         GtkWidget *swindow = gtk_widget_get_parent (GTK_WIDGET (view));
 460         GtkAllocation allocation;
 461         GtkRequisition req;
 462         gint spacing;
 463
 464         if (!GTK_IS_SCROLLED_WINDOW (swindow))
 465                 return 0;
 466
 467         gtk_widget_get_allocation (widget, &allocation);
 468
 469         if (orientation == GTK_ORIENTATION_VERTICAL) {
 470                 if (allocation.height >= view->requisition.height)
 471                         sb = gtk_scrolled_window_get_vscrollbar (GTK_SCROLLED_WINDOW (swindow));
 472                 else
 473                         return 0;
 474         } else {
 475                 if (allocation.width >= view->requisition.width)
 476                         sb = gtk_scrolled_window_get_hscrollbar (GTK_SCROLLED_WINDOW (swindow));
 477                 else
 478                         return 0;
 479         }
 480
 481         gtk_widget_style_get (swindow, "scrollbar_spacing", &spacing, NULL);
 482         gtk_widget_size_request (sb, &req);
 483
 484         return (orientation == GTK_ORIENTATION_VERTICAL ? req.width : req.height) + spacing;
 485 }
 486
 487 static void
 488 scroll_to_point (EvView        *view,
 489                  gdouble        x,
 490                  gdouble        y,
 491                  GtkOrientation orientation)
 492 {
 493         gdouble page_size;
 494         gdouble upper, lower;
 495
 496         if (orientation == GTK_ORIENTATION_VERTICAL) {
 497                 page_size = gtk_adjustment_get_page_size (view->vadjustment);
 498                 upper = gtk_adjustment_get_upper (view->vadjustment);
 499                 lower = gtk_adjustment_get_lower (view->vadjustment);
 500
 501                 if (view->continuous) {
 502                         gtk_adjustment_clamp_page (view->vadjustment,
 503                                                    y - view->spacing / 2,
 504                                                    y + page_size);
 505                 } else {
 506                         gtk_adjustment_set_value (view->vadjustment,
 507                                                   CLAMP (y, lower, upper - page_size));
 508                 }
 509         } else {
 510                 page_size = gtk_adjustment_get_page_size (view->hadjustment);
 511                 upper = gtk_adjustment_get_upper (view->hadjustment);
 512                 lower = gtk_adjustment_get_lower (view->hadjustment);
 513
 514                 if (view->dual_page) {
 515                         gtk_adjustment_clamp_page (view->hadjustment, x,
 516                                                    x + page_size);
 517                 } else {
 518                         gtk_adjustment_set_value (view->hadjustment,
 519                                                   CLAMP (x, lower, upper - page_size));
 520                 }
 521         }
 522 }
 523
 524 static void
 525 ev_view_scroll_to_page_position (EvView *view, GtkOrientation orientation)
 526 {
 527         gdouble x, y;
 528
 529         if (!view->document)
 530                 return;
 531
 532         if ((orientation == GTK_ORIENTATION_VERTICAL && view->pending_point.y == 0) ||
 533             (orientation == GTK_ORIENTATION_HORIZONTAL && view->pending_point.x == 0)) {
 534                 GdkRectangle page_area;
 535                 GtkBorder    border;
 536
 537                 ev_view_get_page_extents (view, view->current_page, &page_area, &border);
 538                 x = page_area.x;
 539                 y = page_area.y;
 540         } else {
 541                 GdkPoint view_point;
 542
 543                 doc_point_to_view_point (view, view->current_page,
 544                                          &view->pending_point, &view_point);
 545                 x = view_point.x;
 546                 y = view_point.y;
 547         }
 548
 549         scroll_to_point (view, x, y, orientation);
 550 }
 551
 552 static void
 553 view_set_adjustment_values (EvView         *view,
 554                             GtkOrientation  orientation)
 555 {
 556         GtkWidget *widget = GTK_WIDGET (view);
 557         GtkAdjustment *adjustment;
 558         GtkAllocation allocation;
 559         int req_size;
 560         int alloc_size;
 561         gdouble page_size;
 562         gdouble value;
 563         gdouble upper;
 564         double factor;
 565         gint new_value;
 566
 567         gtk_widget_get_allocation (widget, &allocation);
 568
 569         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 570                 req_size = view->requisition.width;
 571                 alloc_size = allocation.width;
 572                 adjustment = view->hadjustment;
 573         } else {
 574                 req_size = view->requisition.height;
 575                 alloc_size = allocation.height;
 576                 adjustment = view->vadjustment;
 577         }
 578
 579         if (!adjustment)
 580                 return;
 581
 582         factor = 1.0;
 583         value = gtk_adjustment_get_value (adjustment);
 584         upper = gtk_adjustment_get_upper (adjustment);
 585         page_size = gtk_adjustment_get_page_size (adjustment);
 586
 587         switch (view->pending_scroll) {
 588                 case SCROLL_TO_KEEP_POSITION:
 589                 case SCROLL_TO_FIND_LOCATION:
 590                         factor = value / upper;
 591                         break;
 592                 case SCROLL_TO_PAGE_POSITION:
 593                         break;
 594                 case SCROLL_TO_CENTER:
 595                         factor = (value + page_size * 0.5) / upper;
 596                         break;
 597         }
 598
 599         upper = MAX (alloc_size, req_size);
 600         page_size = alloc_size;
 601
 602         gtk_adjustment_set_page_size (adjustment, page_size);
 603         gtk_adjustment_set_step_increment (adjustment, alloc_size * 0.1);
 604         gtk_adjustment_set_page_increment (adjustment, alloc_size * 0.9);
 605         gtk_adjustment_set_lower (adjustment, 0);
 606         gtk_adjustment_set_upper (adjustment, upper);
 607
 608         /*
 609          * We add 0.5 to the values before to average out our rounding errors.
 610          */
 611         switch (view->pending_scroll) {
 612                 case SCROLL_TO_KEEP_POSITION:
 613                 case SCROLL_TO_FIND_LOCATION:
 614                         new_value = CLAMP (upper * factor + 0.5, 0, upper - page_size);
 615                         gtk_adjustment_set_value (adjustment, (int)new_value);
 616                         break;
 617                 case SCROLL_TO_PAGE_POSITION:
 618                         ev_view_scroll_to_page_position (view, orientation);
 619                         break;
 620                 case SCROLL_TO_CENTER:
 621                         new_value = CLAMP (upper * factor - page_size * 0.5 + 0.5,
 622                                            0, upper - page_size);
 623                         gtk_adjustment_set_value (adjustment, (int)new_value);
 624                         break;
 625         }
 626
 627         gtk_adjustment_changed (adjustment);
 628 }
 629
 630 static void
 631 view_update_range_and_current_page (EvView *view)
 632 {
 633         gint start = view->start_page;
 634         gint end = view->end_page;
 635
 636         if (ev_document_get_n_pages (view->document) <= 0 ||
 637             !ev_document_check_dimensions (view->document))
 638                 return;
 639
 640         if (view->continuous) {
 641                 GdkRectangle current_area, unused, page_area;
 642                 GtkBorder border;
 643                 gboolean found = FALSE;
 644                 gint area_max = -1, area;
 645                 gint best_current_page = -1;
 646                 int i, j = 0;
 647
 648                 if (!(view->vadjustment && view->hadjustment))
 649                         return;
 650
 651                 current_area.x = gtk_adjustment_get_value (view->hadjustment);
 652                 current_area.width = gtk_adjustment_get_page_size (view->hadjustment);
 653                 current_area.y = gtk_adjustment_get_value (view->vadjustment);
 654                 current_area.height = gtk_adjustment_get_page_size (view->vadjustment);
 655
 656                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 657
 658                         ev_view_get_page_extents (view, i, &page_area, &border);
 659
 660                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 661                                 area = unused.width * unused.height;
 662
 663                                 if (!found) {
 664                                         area_max = area;
 665                                         view->start_page = i;
 666                                         found = TRUE;
 667                                         best_current_page = i;
 668                                 }
 669                                 if (area > area_max) {
 670                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 671                                         area_max = area;
 672                                 }
 673
 674                                 view->end_page = i;
 675                                 j = 0;
 676                         } else if (found && view->current_page <= view->end_page) {
 677                                 if (view->dual_page && j < 1) {
 678                                         /* In dual mode  we stop searching
 679                                          * after two consecutive non-visible pages.
 680                                          */
 681                                         j++;
 682                                         continue;
 683                                 }
 684                                 break;
 685                         }
 686                 }
 687
 688                 if (view->pending_scroll == SCROLL_TO_KEEP_POSITION) {
 689                         best_current_page = MAX (best_current_page, view->start_page);
 690
 691                         if (view->current_page != best_current_page) {
 692                                 view->current_page = best_current_page;
 693                                 hide_loading_window (view);
 694                                 ev_document_model_set_page (view->model, best_current_page);
 695                         }
 696                 }
 697         } else if (view->dual_page) {
 698                 if (view->current_page % 2 == get_dual_even_left (view)) {
 699                         view->start_page = view->current_page;
 700                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 701                                 view->end_page = view->start_page + 1;
 702                         else
 703                                 view->end_page = view->start_page;
 704                 } else {
 705                         if (view->current_page < 1)
 706                                 view->start_page = view->current_page;
 707                         else
 708                                 view->start_page = view->current_page - 1;
 709                         view->end_page = view->current_page;
 710                 }
 711         } else {
 712                 view->start_page = view->current_page;
 713                 view->end_page = view->current_page;
 714         }
 715
 716         if (view->start_page == -1 || view->end_page == -1)
 717                 return;
 718
 719         if (start != view->start_page || end != view->end_page) {
 720                 gint i;
 721
 722                 for (i = start; i < view->start_page && start != -1; i++) {
 723                         hide_annotation_windows (view, i);
 724                 }
 725
 726                 for (i = end; i > view->end_page && end != -1; i--) {
 727                         hide_annotation_windows (view, i);
 728                 }
 729         }
 730
 731         ev_page_cache_set_page_range (view->page_cache,
 732                                       view->start_page,
 733                                       view->end_page);
 734         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 735                                         view->start_page,
 736                                         view->end_page,
 737                                         view->selection_info.selections);
 738
 739         if (ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page))
 740             gtk_widget_queue_draw (GTK_WIDGET (view));
 741 }
 742
 743 static void
 744 set_scroll_adjustment (EvView *view,
 745                        GtkOrientation  orientation,
 746                        GtkAdjustment  *adjustment)
 747 {
 748         GtkAdjustment **to_set;
 749
 750         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 751                 to_set = &view->hadjustment;
 752         else
 753                 to_set = &view->vadjustment;
 754
 755         if (*to_set != adjustment) {
 756                 if (*to_set) {
 757                         g_signal_handlers_disconnect_by_func (*to_set,
 758                                                               (gpointer) on_adjustment_value_changed,
 759                                                               view);
 760                         g_object_unref (*to_set);
 761                 }
 762
 763                 *to_set = adjustment;
 764                 view_set_adjustment_values (view, orientation);
 765
 766                 if (*to_set) {
 767                         g_object_ref (*to_set);
 768                         g_signal_connect (*to_set, "value_changed",
 769                                           G_CALLBACK (on_adjustment_value_changed), view);
 770                 }
 771         }
 772 }
 773
 774 static void
 775 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 776                                 GtkAdjustment  *hadjustment,
 777                                 GtkAdjustment  *vadjustment)
 778 {
 779         EvView *view = EV_VIEW (layout);
 780
 781         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 782         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 783
 784         on_adjustment_value_changed (NULL, view);
 785 }
 786
 787 static void
 788 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 789                            guint           keyval,
 790                            GdkModifierType modifiers,
 791                            GtkScrollType   scroll,
 792                            gboolean        horizontal)
 793 {
 794   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 795
 796   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 797                                 "binding_activated", 2,
 798                                 GTK_TYPE_SCROLL_TYPE, scroll,
 799                                 G_TYPE_BOOLEAN, horizontal);
 800   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 801                                 "binding_activated", 2,
 802                                 GTK_TYPE_SCROLL_TYPE, scroll,
 803                                 G_TYPE_BOOLEAN, horizontal);
 804 }
 805
 806 static gdouble
 807 compute_scroll_increment (EvView        *view,
 808                           GtkScrollType  scroll)
 809 {
 810         GtkWidget *widget = GTK_WIDGET (view);
 811         GtkAdjustment *adjustment = view->vadjustment;
 812         cairo_region_t *text_region, *region;
 813         GtkAllocation allocation;
 814         gint page;
 815         GdkRectangle rect;
 816         EvRectangle doc_rect;
 817         GdkRectangle page_area;
 818         GtkBorder border;
 819         gdouble fraction = 1.0;
 820
 821         if (scroll != GTK_SCROLL_PAGE_BACKWARD && scroll != GTK_SCROLL_PAGE_FORWARD)
 822                 return gtk_adjustment_get_page_size (adjustment);
 823
 824         page = scroll == GTK_SCROLL_PAGE_BACKWARD ? view->start_page : view->end_page;
 825
 826         text_region = ev_page_cache_get_text_mapping (view->page_cache, page);
 827         if (!text_region || cairo_region_is_empty (text_region))
 828                 return gtk_adjustment_get_page_size (adjustment);
 829
 830         gtk_widget_get_allocation (widget, &allocation);
 831         ev_view_get_page_extents (view, page, &page_area, &border);
 832         rect.x = page_area.x + view->scroll_x;
 833         rect.y = view->scroll_y + (scroll == GTK_SCROLL_PAGE_BACKWARD ? 5 : allocation.height - 5);
 834         rect.width = page_area.width;
 835         rect.height = 1;
 836         view_rect_to_doc_rect (view, &rect, &page_area, &doc_rect);
 837
 838         /* Convert the doc rectangle into a GdkRectangle */
 839         rect.x = doc_rect.x1;
 840         rect.y = doc_rect.y1;
 841         rect.width = doc_rect.x2 - doc_rect.x1;
 842         rect.height = MAX (1, doc_rect.y2 - doc_rect.y1);
 843         region = cairo_region_create_rectangle (&rect);
 844
 845         cairo_region_intersect (region, text_region);
 846         if (cairo_region_num_rectangles (region)) {
 847                 EvRenderContext *rc;
 848                 EvPage  *ev_page;
 849                 cairo_region_t *sel_region;
 850
 851                 cairo_region_get_rectangle (region, 0, &rect);
 852                 ev_page = ev_document_get_page (view->document, page);
 853                 rc = ev_render_context_new (ev_page, view->rotation, view->scale);
 854                 g_object_unref (ev_page);
 855                 /* Get the selection region to know the height of the line */
 856                 doc_rect.x1 = doc_rect.x2 = rect.x + 0.5;
 857                 doc_rect.y1 = doc_rect.y2 = rect.y + 0.5;
 858
 859                 ev_document_doc_mutex_lock ();
 860                 sel_region = ev_selection_get_selection_region (EV_SELECTION (view->document),
 861                                                                 rc, EV_SELECTION_STYLE_LINE,
 862                                                                 &doc_rect);
 863                 ev_document_doc_mutex_unlock ();
 864
 865                 g_object_unref (rc);
 866
 867                 if (cairo_region_num_rectangles (sel_region) > 0) {
 868                         cairo_region_get_rectangle (sel_region, 0, &rect);
 869                         fraction = 1 - (rect.height / gtk_adjustment_get_page_size (adjustment));
 870                 }
 871                 cairo_region_destroy (sel_region);
 872         }
 873         cairo_region_destroy (region);
 874
 875         return gtk_adjustment_get_page_size (adjustment) * fraction;
 876
 877 }
 878
 879 void
 880 ev_view_scroll (EvView        *view,
 881                 GtkScrollType  scroll,
 882                 gboolean       horizontal)
 883 {
 884         GtkAdjustment *adjustment;
 885         double value, increment;
 886         gdouble upper, lower;
 887         gdouble page_size;
 888         gdouble step_increment;
 889         gboolean first_page = FALSE;
 890         gboolean last_page = FALSE;
 891
 892         view->jump_to_find_result = FALSE;
 893
 894         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
 895                 switch (scroll) {
 896                         case GTK_SCROLL_PAGE_BACKWARD:
 897                         case GTK_SCROLL_STEP_BACKWARD:
 898                                 ev_view_previous_page (view);
 899                                 break;
 900                         case GTK_SCROLL_PAGE_FORWARD:
 901                         case GTK_SCROLL_STEP_FORWARD:
 902                                 ev_view_next_page (view);
 903                                 break;
 904                         default:
 905                                 break;
 906                 }
 907                 return;
 908         }
 909
 910         /* Assign values for increment and vertical adjustment */
 911         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 912         value = gtk_adjustment_get_value (adjustment);
 913         upper = gtk_adjustment_get_upper (adjustment);
 914         lower = gtk_adjustment_get_lower (adjustment);
 915         page_size = gtk_adjustment_get_page_size (adjustment);
 916         step_increment = gtk_adjustment_get_step_increment (adjustment);
 917
 918         /* Assign boolean for first and last page */
 919         if (view->current_page == 0)
 920                 first_page = TRUE;
 921         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 922                 last_page = TRUE;
 923
 924         switch (scroll) {
 925                 case GTK_SCROLL_PAGE_BACKWARD:
 926                         /* Do not jump backwards if at the first page */
 927                         if (value == lower && first_page) {
 928                                 /* Do nothing */
 929                                 /* At the top of a page, assign the upper bound limit of previous page */
 930                         } else if (value == lower) {
 931                                 value = upper - page_size;
 932                                 ev_view_previous_page (view);
 933                                 /* Jump to the top */
 934                         } else {
 935                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_BACKWARD);
 936                                 value = MAX (value - increment, lower);
 937                         }
 938                         break;
 939                 case GTK_SCROLL_PAGE_FORWARD:
 940                         /* Do not jump forward if at the last page */
 941                         if (value == (upper - page_size) && last_page) {
 942                                 /* Do nothing */
 943                         /* At the bottom of a page, assign the lower bound limit of next page */
 944                         } else if (value == (upper - page_size)) {
 945                                 value = 0;
 946                                 ev_view_next_page (view);
 947                         /* Jump to the bottom */
 948                         } else {
 949                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_FORWARD);
 950                                 value = MIN (value + increment, upper - page_size);
 951                         }
 952                         break;
 953                 case GTK_SCROLL_STEP_BACKWARD:
 954                         value -= step_increment;
 955                         break;
 956                 case GTK_SCROLL_STEP_FORWARD:
 957                         value += step_increment;
 958                         break;
 959                 case GTK_SCROLL_STEP_DOWN:
 960                         value -= step_increment / 10;
 961                         break;
 962                 case GTK_SCROLL_STEP_UP:
 963                         value += step_increment / 10;
 964                         break;
 965                 default:
 966                         break;
 967         }
 968
 969         value = CLAMP (value, lower, upper - page_size);
 970
 971         gtk_adjustment_set_value (adjustment, value);
 972 }
 973
 974 #define MARGIN 5
 975
 976 static void
 977 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 978 {
 979         GtkWidget *widget = GTK_WIDGET (view);
 980         GtkAdjustment *adjustment;
 981         GtkAllocation allocation;
 982         gdouble adj_value;
 983         int value;
 984
 985         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 986
 987         gtk_widget_get_allocation (widget, &allocation);
 988
 989         adjustment = view->vadjustment;
 990         adj_value = gtk_adjustment_get_value (adjustment);
 991
 992         if (rect->y < adj_value) {
 993                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->y - MARGIN);
 994                 gtk_adjustment_set_value (view->vadjustment, value);
 995         } else if (rect->y + rect->height > adj_value + allocation.height) {
 996                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->y + rect->height -
 997                              allocation.height + MARGIN);
 998                 gtk_adjustment_set_value (view->vadjustment, value);
 999         }
1000
1001         adjustment = view->hadjustment;
1002         adj_value = gtk_adjustment_get_value (adjustment);
1003
1004         if (rect->x < adj_value) {
1005                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->x - MARGIN);
1006                 gtk_adjustment_set_value (view->hadjustment, value);
1007         } else if (rect->x + rect->height > adj_value + allocation.width) {
1008                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->x + rect->width -
1009                              allocation.width + MARGIN);
1010                 gtk_adjustment_set_value (view->hadjustment, value);
1011         }
1012
1013         gtk_widget_queue_resize (GTK_WIDGET (view));
1014 }
1015
1016 /*** Geometry computations ***/
1017
1018 static void
1019 compute_border (EvView *view, int width, int height, GtkBorder *border)
1020 {
1021         ev_document_misc_get_page_border_size (width, height, border);
1022 }
1023
1024 void
1025 _get_page_size_for_scale_and_rotation (EvDocument *document,
1026                                        gint        page,
1027                                        gdouble     scale,
1028                                        gint        rotation,
1029                                        gint       *page_width,
1030                                        gint       *page_height)
1031 {
1032         gdouble w, h;
1033         gint    width, height;
1034
1035         ev_document_get_page_size (document, page, &w, &h);
1036
1037         width = (gint)(w * scale + 0.5);
1038         height = (gint)(h * scale + 0.5);
1039
1040         if (page_width)
1041                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
1042         if (page_height)
1043                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
1044 }
1045
1046 static void
1047 ev_view_get_page_size (EvView *view,
1048                        gint    page,
1049                        gint   *page_width,
1050                        gint   *page_height)
1051 {
1052         _get_page_size_for_scale_and_rotation (view->document,
1053                                                page,
1054                                                view->scale,
1055                                                view->rotation,
1056                                                page_width,
1057                                                page_height);
1058 }
1059
1060 static void
1061 ev_view_get_max_page_size (EvView *view,
1062                            gint   *max_width,
1063                            gint   *max_height)
1064 {
1065         double w, h;
1066         gint   width, height;
1067
1068         ev_document_get_max_page_size (view->document, &w, &h);
1069
1070         width = (gint)(w * view->scale + 0.5);
1071         height = (gint)(h * view->scale + 0.5);
1072
1073         if (max_width)
1074                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
1075         if (max_height)
1076                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
1077 }
1078
1079 static void
1080 get_page_y_offset (EvView *view, int page, int *y_offset)
1081 {
1082         int max_width, offset;
1083         GtkBorder border;
1084
1085         g_return_if_fail (y_offset != NULL);
1086
1087         ev_view_get_max_page_size (view, &max_width, NULL);
1088         compute_border (view, max_width, max_width, &border);
1089
1090         if (view->dual_page) {
1091                 ev_view_get_height_to_page (view, page, NULL, &offset);
1092                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
1093                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
1094         } else {
1095                 ev_view_get_height_to_page (view, page, &offset, NULL);
1096                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
1097         }
1098
1099         *y_offset = offset;
1100         return;
1101 }
1102
1103 gboolean
1104 ev_view_get_page_extents (EvView       *view,
1105                           gint          page,
1106                           GdkRectangle *page_area,
1107                           GtkBorder    *border)
1108 {
1109         GtkWidget *widget;
1110         int width, height;
1111         GtkAllocation allocation;
1112
1113         widget = GTK_WIDGET (view);
1114         gtk_widget_get_allocation (widget, &allocation);
1115
1116         /* Get the size of the page */
1117         ev_view_get_page_size (view, page, &width, &height);
1118         compute_border (view, width, height, border);
1119         page_area->width = width + border->left + border->right;
1120         page_area->height = height + border->top + border->bottom;
1121
1122         if (view->continuous) {
1123                 gint max_width;
1124                 gint x, y;
1125
1126                 ev_view_get_max_page_size (view, &max_width, NULL);
1127                 max_width = max_width + border->left + border->right;
1128                 /* Get the location of the bounding box */
1129                 if (view->dual_page) {
1130                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1131                         x = x + MAX (0, allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1132                         if (page % 2 == get_dual_even_left (view))
1133                                 x = x + (max_width - width - border->left - border->right);
1134                 } else {
1135                         x = view->spacing;
1136                         x = x + MAX (0, allocation.width - (width + view->spacing * 2)) / 2;
1137                 }
1138
1139                 get_page_y_offset (view, page, &y);
1140
1141                 page_area->x = x;
1142                 page_area->y = y;
1143         } else {
1144                 gint x, y;
1145                 if (view->dual_page) {
1146                         gint width_2, height_2;
1147                         gint max_width = width;
1148                         gint max_height = height;
1149                         GtkBorder overall_border;
1150                         gint other_page;
1151
1152                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1153
1154                         /* First, we get the bounding box of the two pages */
1155                         if (other_page < ev_document_get_n_pages (view->document)
1156                             && (0 <= other_page)) {
1157                                 ev_view_get_page_size (view, other_page,
1158                                                        &width_2, &height_2);
1159                                 if (width_2 > width)
1160                                         max_width = width_2;
1161                                 if (height_2 > height)
1162                                         max_height = height_2;
1163                         }
1164                         compute_border (view, max_width, max_height, &overall_border);
1165
1166                         /* Find the offsets */
1167                         x = view->spacing;
1168                         y = view->spacing;
1169
1170                         /* Adjust for being the left or right page */
1171                         if (page % 2 == get_dual_even_left (view))
1172                                 x = x + max_width - width;
1173                         else
1174                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1175
1176                         y = y + (max_height - height)/2;
1177
1178                         /* Adjust for extra allocation */
1179                         x = x + MAX (0, allocation.width -
1180                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1181                         y = y + MAX (0, allocation.height - (height + view->spacing * 2))/2;
1182                 } else {
1183                         x = view->spacing;
1184                         y = view->spacing;
1185
1186                         /* Adjust for extra allocation */
1187                         x = x + MAX (0, allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1188                         y = y + MAX (0, allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1189                 }
1190
1191                 page_area->x = x;
1192                 page_area->y = y;
1193         }
1194
1195         return TRUE;
1196 }
1197
1198 static void
1199 get_doc_page_size (EvView  *view,
1200                    gint     page,
1201                    gdouble *width,
1202                    gdouble *height)
1203 {
1204         double w, h;
1205
1206         ev_document_get_page_size (view->document, page, &w, &h);
1207         if (view->rotation == 0 || view->rotation == 180) {
1208                 if (width) *width = w;
1209                 if (height) *height = h;
1210         } else {
1211                 if (width) *width = h;
1212                 if (height) *height = w;
1213         }
1214 }
1215
1216 static void
1217 view_point_to_doc_point (EvView *view,
1218                          GdkPoint *view_point,
1219                          GdkRectangle *page_area,
1220                          double  *doc_point_x,
1221                          double  *doc_point_y)
1222 {
1223         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1224         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1225 }
1226
1227 static void
1228 view_rect_to_doc_rect (EvView *view,
1229                        GdkRectangle *view_rect,
1230                        GdkRectangle *page_area,
1231                        EvRectangle  *doc_rect)
1232 {
1233         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1234         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1235         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1236         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1237 }
1238
1239 static void
1240 doc_point_to_view_point (EvView       *view,
1241                          int           page,
1242                          EvPoint      *doc_point,
1243                          GdkPoint     *view_point)
1244 {
1245         GdkRectangle page_area;
1246         GtkBorder border;
1247         double x, y, view_x, view_y;
1248         gdouble width, height;
1249
1250         get_doc_page_size (view, page, &width, &height);
1251
1252         if (view->rotation == 0) {
1253                 x = doc_point->x;
1254                 y = doc_point->y;
1255         } else if (view->rotation == 90) {
1256                 x = width - doc_point->y;
1257                 y = doc_point->x;
1258         } else if (view->rotation == 180) {
1259                 x = width - doc_point->x;
1260                 y = height - doc_point->y;
1261         } else if (view->rotation == 270) {
1262                 x = doc_point->y;
1263                 y = height - doc_point->x;
1264         } else {
1265                 g_assert_not_reached ();
1266         }
1267
1268         ev_view_get_page_extents (view, page, &page_area, &border);
1269
1270         view_x = CLAMP (x * view->scale, 0, page_area.width);
1271         view_y = CLAMP (y * view->scale, 0, page_area.height);
1272         view_point->x = view_x + page_area.x;
1273         view_point->y = view_y + page_area.y;
1274 }
1275
1276 static void
1277 doc_rect_to_view_rect (EvView       *view,
1278                        int           page,
1279                        EvRectangle  *doc_rect,
1280                        GdkRectangle *view_rect)
1281 {
1282         GdkRectangle page_area;
1283         GtkBorder border;
1284         double x, y, w, h;
1285         gdouble width, height;
1286
1287         get_doc_page_size (view, page, &width, &height);
1288
1289         if (view->rotation == 0) {
1290                 x = doc_rect->x1;
1291                 y = doc_rect->y1;
1292                 w = doc_rect->x2 - doc_rect->x1;
1293                 h = doc_rect->y2 - doc_rect->y1;
1294         } else if (view->rotation == 90) {
1295                 x = width - doc_rect->y2;
1296                 y = doc_rect->x1;
1297                 w = doc_rect->y2 - doc_rect->y1;
1298                 h = doc_rect->x2 - doc_rect->x1;
1299         } else if (view->rotation == 180) {
1300                 x = width - doc_rect->x2;
1301                 y = height - doc_rect->y2;
1302                 w = doc_rect->x2 - doc_rect->x1;
1303                 h = doc_rect->y2 - doc_rect->y1;
1304         } else if (view->rotation == 270) {
1305                 x = doc_rect->y1;
1306                 y = height - doc_rect->x2;
1307                 w = doc_rect->y2 - doc_rect->y1;
1308                 h = doc_rect->x2 - doc_rect->x1;
1309         } else {
1310                 g_assert_not_reached ();
1311         }
1312
1313         ev_view_get_page_extents (view, page, &page_area, &border);
1314
1315         view_rect->x = x * view->scale + page_area.x;
1316         view_rect->y = y * view->scale + page_area.y;
1317         view_rect->width = w * view->scale;
1318         view_rect->height = h * view->scale;
1319 }
1320
1321 static gboolean
1322 get_dual_even_left (EvView *view)
1323 {
1324         return (ev_document_get_n_pages (view->document) > 2);
1325 }
1326
1327 static void
1328 find_page_at_location (EvView  *view,
1329                        gdouble  x,
1330                        gdouble  y,
1331                        gint    *page,
1332                        gint    *x_offset,
1333                        gint    *y_offset)
1334 {
1335         int i;
1336
1337         if (view->document == NULL)
1338                 return;
1339
1340         g_assert (page);
1341         g_assert (x_offset);
1342         g_assert (y_offset);
1343
1344         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1345                 GdkRectangle page_area;
1346                 GtkBorder border;
1347
1348                 if (! ev_view_get_page_extents (view, i, &page_area, &border))
1349                         continue;
1350
1351                 if ((x >= page_area.x + border.left) &&
1352                     (x < page_area.x + page_area.width - border.right) &&
1353                     (y >= page_area.y + border.top) &&
1354                     (y < page_area.y + page_area.height - border.bottom)) {
1355                         *page = i;
1356                         *x_offset = x - (page_area.x + border.left);
1357                         *y_offset = y - (page_area.y + border.top);
1358                         return;
1359                 }
1360         }
1361
1362         *page = -1;
1363 }
1364
1365 static gboolean
1366 location_in_text (EvView  *view,
1367                   gdouble  x,
1368                   gdouble  y)
1369 {
1370         cairo_region_t *region;
1371         gint page = -1;
1372         gint x_offset = 0, y_offset = 0;
1373
1374         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1375
1376         if (page == -1)
1377                 return FALSE;
1378
1379         region = ev_page_cache_get_text_mapping (view->page_cache, page);
1380
1381         if (region)
1382                 return cairo_region_contains_point (region, x_offset / view->scale, y_offset / view->scale);
1383         else
1384                 return FALSE;
1385 }
1386
1387 static gboolean
1388 location_in_selected_text (EvView  *view,
1389                            gdouble  x,
1390                            gdouble  y)
1391 {
1392         gint page = -1;
1393         gint x_offset = 0, y_offset = 0;
1394         EvViewSelection *selection;
1395         GList *l = NULL;
1396
1397         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1398                 selection = (EvViewSelection *)l->data;
1399
1400                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1401
1402                 if (page != selection->page)
1403                         continue;
1404
1405                 if (selection->covered_region &&
1406                     cairo_region_contains_point (selection->covered_region, x_offset, y_offset))
1407                         return TRUE;
1408         }
1409
1410         return FALSE;
1411 }
1412
1413 static gboolean
1414 get_doc_point_from_offset (EvView *view,
1415                            gint    page,
1416                            gint    x_offset,
1417                            gint    y_offset,
1418                            gint   *x_new,
1419                            gint   *y_new)
1420 {
1421         gdouble width, height;
1422         double x, y;
1423
1424         get_doc_page_size (view, page, &width, &height);
1425
1426         x_offset = x_offset / view->scale;
1427         y_offset = y_offset / view->scale;
1428
1429         if (view->rotation == 0) {
1430                 x = x_offset;
1431                 y = y_offset;
1432         } else if (view->rotation == 90) {
1433                 x = y_offset;
1434                 y = width - x_offset;
1435         } else if (view->rotation == 180) {
1436                 x = width - x_offset;
1437                 y = height - y_offset;
1438         } else if (view->rotation == 270) {
1439                 x = height - y_offset;
1440                 y = x_offset;
1441         } else {
1442                 g_assert_not_reached ();
1443         }
1444
1445         *x_new = x;
1446         *y_new = y;
1447
1448         return TRUE;
1449 }
1450
1451 static gboolean
1452 get_doc_point_from_location (EvView  *view,
1453                              gdouble  x,
1454                              gdouble  y,
1455                              gint    *page,
1456                              gint    *x_new,
1457                              gint    *y_new)
1458 {
1459         gint x_offset = 0, y_offset = 0;
1460
1461         x += view->scroll_x;
1462         y += view->scroll_y;
1463         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1464         if (*page == -1)
1465                 return FALSE;
1466
1467         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1468 }
1469
1470 static void
1471 ev_view_get_area_from_mapping (EvView        *view,
1472                                guint          page,
1473                                EvMappingList *mapping_list,
1474                                gconstpointer  data,
1475                                GdkRectangle  *area)
1476 {
1477         EvMapping *mapping;
1478
1479         mapping = ev_mapping_list_find (mapping_list, data);
1480         doc_rect_to_view_rect (view, page, &mapping->area, area);
1481         area->x -= view->scroll_x;
1482         area->y -= view->scroll_y;
1483 }
1484
1485
1486 /*** Hyperref ***/
1487 static EvLink *
1488 ev_view_get_link_at_location (EvView  *view,
1489                               gdouble  x,
1490                               gdouble  y)
1491 {
1492         gint page = -1;
1493         gint x_new = 0, y_new = 0;
1494         EvMappingList *link_mapping;
1495
1496         if (!EV_IS_DOCUMENT_LINKS (view->document))
1497                 return NULL;
1498
1499         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1500                 return NULL;
1501
1502         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
1503
1504         if (link_mapping)
1505                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1506         else
1507                 return NULL;
1508 }
1509
1510 static void
1511 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1512 {
1513         EvPoint doc_point;
1514         gdouble zoom, left, top;
1515         gboolean change_left, change_top;
1516         GtkAllocation allocation;
1517
1518         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1519
1520         left = ev_link_dest_get_left (dest, &change_left);
1521         top = ev_link_dest_get_top (dest, &change_top);
1522
1523         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1524                                        ev_link_dest_get_bottom (dest) - top,
1525                                        allocation.width,
1526                                        allocation.height);
1527
1528         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1529         ev_document_model_set_scale (view->model, zoom);
1530
1531         doc_point.x = change_left ? left : 0;
1532         doc_point.y = change_top ? top : 0;
1533         view->pending_point = doc_point;
1534
1535         ev_view_change_page (view, ev_link_dest_get_page (dest));
1536 }
1537
1538 static void
1539 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1540 {
1541         EvPoint doc_point;
1542         gdouble doc_width, doc_height;
1543         gint page;
1544         double zoom, left;
1545         gboolean change_left;
1546         GtkAllocation allocation;
1547
1548         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1549
1550         page = ev_link_dest_get_page (dest);
1551         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1552
1553         left = ev_link_dest_get_left (dest, &change_left);
1554         doc_point.x = change_left ? left : 0;
1555         doc_point.y = 0;
1556
1557         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1558                                          allocation.width,
1559                                          allocation.height);
1560
1561         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1562         ev_document_model_set_scale (view->model, zoom);
1563
1564         view->pending_point = doc_point;
1565
1566         ev_view_change_page (view, page);
1567 }
1568
1569 static void
1570 goto_fith_dest (EvView *view, EvLinkDest *dest)
1571 {
1572         EvPoint doc_point;
1573         gdouble doc_width, doc_height;
1574         gint page;
1575         gdouble zoom, top;
1576         gboolean change_top;
1577         GtkAllocation allocation;
1578
1579         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1580
1581         page = ev_link_dest_get_page (dest);
1582         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1583
1584         top = ev_link_dest_get_top (dest, &change_top);
1585
1586         doc_point.x = 0;
1587         doc_point.y = change_top ? top : 0;
1588
1589         zoom = zoom_for_size_fit_width (doc_width, top,
1590                                         allocation.width,
1591                                         allocation.height);
1592
1593         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1594         ev_document_model_set_scale (view->model, zoom);
1595
1596         view->pending_point = doc_point;
1597
1598         ev_view_change_page (view, page);
1599 }
1600
1601 static void
1602 goto_fit_dest (EvView *view, EvLinkDest *dest)
1603 {
1604         double zoom;
1605         gdouble doc_width, doc_height;
1606         int page;
1607         GtkAllocation allocation;
1608
1609         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1610
1611         page = ev_link_dest_get_page (dest);
1612         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1613
1614         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1615                                        allocation.width,
1616                                        allocation.height);
1617
1618         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1619         ev_document_model_set_scale (view->model, zoom);
1620
1621         ev_view_change_page (view, page);
1622 }
1623
1624 static void
1625 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1626 {
1627         EvPoint doc_point;
1628         gint page;
1629         gdouble zoom, left, top;
1630         gboolean change_zoom, change_left, change_top;
1631
1632         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1633         page = ev_link_dest_get_page (dest);
1634
1635         if (change_zoom && zoom > 1) {
1636                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1637                 ev_document_model_set_scale (view->model, zoom);
1638         }
1639
1640         left = ev_link_dest_get_left (dest, &change_left);
1641         top = ev_link_dest_get_top (dest, &change_top);
1642
1643         doc_point.x = change_left ? left : 0;
1644         doc_point.y = change_top ? top : 0;
1645         view->pending_point = doc_point;
1646
1647         ev_view_change_page (view, page);
1648 }
1649
1650 static void
1651 goto_dest (EvView *view, EvLinkDest *dest)
1652 {
1653         EvLinkDestType type;
1654         int page, n_pages, current_page;
1655
1656         page = ev_link_dest_get_page (dest);
1657         n_pages = ev_document_get_n_pages (view->document);
1658
1659         if (page < 0 || page >= n_pages)
1660                 return;
1661
1662         current_page = view->current_page;
1663
1664         type = ev_link_dest_get_dest_type (dest);
1665
1666         switch (type) {
1667                 case EV_LINK_DEST_TYPE_PAGE:
1668                         ev_document_model_set_page (view->model, page);
1669                         break;
1670                 case EV_LINK_DEST_TYPE_FIT:
1671                         goto_fit_dest (view, dest);
1672                         break;
1673                 case EV_LINK_DEST_TYPE_FITH:
1674                         goto_fith_dest (view, dest);
1675                         break;
1676                 case EV_LINK_DEST_TYPE_FITV:
1677                         goto_fitv_dest (view, dest);
1678                         break;
1679                 case EV_LINK_DEST_TYPE_FITR:
1680                         goto_fitr_dest (view, dest);
1681                         break;
1682                 case EV_LINK_DEST_TYPE_XYZ:
1683                         goto_xyz_dest (view, dest);
1684                         break;
1685                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1686                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1687                         break;
1688                 default:
1689                         g_assert_not_reached ();
1690         }
1691
1692         if (current_page != view->current_page)
1693                 ev_document_model_set_page (view->model, view->current_page);
1694 }
1695
1696 static void
1697 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1698 {
1699         EvLinkDestType type;
1700
1701         type = ev_link_dest_get_dest_type (dest);
1702
1703         if (type == EV_LINK_DEST_TYPE_NAMED) {
1704                 EvLinkDest  *dest2;
1705                 const gchar *named_dest;
1706
1707                 named_dest = ev_link_dest_get_named_dest (dest);
1708                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1709                                                           named_dest);
1710                 if (dest2) {
1711                         goto_dest (view, dest2);
1712                         g_object_unref (dest2);
1713                 }
1714
1715                 return;
1716         }
1717
1718         goto_dest (view, dest);
1719 }
1720
1721 void
1722 ev_view_handle_link (EvView *view, EvLink *link)
1723 {
1724         EvLinkAction    *action = NULL;
1725         EvLinkActionType type;
1726
1727         action = ev_link_get_action (link);
1728         if (!action)
1729                 return;
1730
1731         type = ev_link_action_get_action_type (action);
1732
1733         switch (type) {
1734                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1735                         EvLinkDest *dest;
1736
1737                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1738
1739                         dest = ev_link_action_get_dest (action);
1740                         ev_view_goto_dest (view, dest);
1741                 }
1742                         break;
1743                 case EV_LINK_ACTION_TYPE_LAYERS_STATE: {
1744                         GList            *show, *hide, *toggle;
1745                         GList            *l;
1746                         EvDocumentLayers *document_layers;
1747
1748                         document_layers = EV_DOCUMENT_LAYERS (view->document);
1749
1750                         show = ev_link_action_get_show_list (action);
1751                         for (l = show; l; l = g_list_next (l)) {
1752                                 ev_document_layers_show_layer (document_layers, EV_LAYER (l->data));
1753                         }
1754
1755                         hide = ev_link_action_get_hide_list (action);
1756                         for (l = hide; l; l = g_list_next (l)) {
1757                                 ev_document_layers_hide_layer (document_layers, EV_LAYER (l->data));
1758                         }
1759
1760                         toggle = ev_link_action_get_toggle_list (action);
1761                         for (l = toggle; l; l = g_list_next (l)) {
1762                                 EvLayer *layer = EV_LAYER (l->data);
1763
1764                                 if (ev_document_layers_layer_is_visible (document_layers, layer)) {
1765                                         ev_document_layers_hide_layer (document_layers, layer);
1766                                 } else {
1767                                         ev_document_layers_show_layer (document_layers, layer);
1768                                 }
1769                         }
1770
1771                         g_signal_emit (view, signals[SIGNAL_LAYERS_CHANGED], 0);
1772                         ev_view_reload_page (view, view->current_page, NULL);
1773                 }
1774                         break;
1775                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1776                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1777                 case EV_LINK_ACTION_TYPE_LAUNCH:
1778                 case EV_LINK_ACTION_TYPE_NAMED:
1779                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1780                         break;
1781         }
1782 }
1783
1784 static char *
1785 tip_from_action_named (EvLinkAction *action)
1786 {
1787         const gchar *name = ev_link_action_get_name (action);
1788
1789         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1790                 return g_strdup (_("Go to first page"));
1791         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1792                 return g_strdup (_("Go to previous page"));
1793         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1794                 return g_strdup (_("Go to next page"));
1795         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1796                 return g_strdup (_("Go to last page"));
1797         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1798                 return g_strdup (_("Go to page"));
1799         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1800                 return g_strdup (_("Find"));
1801         }
1802
1803         return NULL;
1804 }
1805
1806 static char *
1807 tip_from_link (EvView *view, EvLink *link)
1808 {
1809         EvLinkAction *action;
1810         EvLinkActionType type;
1811         char *msg = NULL;
1812         char *page_label;
1813         const char *title;
1814
1815         action = ev_link_get_action (link);
1816         title = ev_link_get_title (link);
1817
1818         if (!action)
1819                 return title ? g_strdup (title) : NULL;
1820
1821         type = ev_link_action_get_action_type (action);
1822
1823         switch (type) {
1824                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1825                         page_label = ev_document_links_get_dest_page_label (EV_DOCUMENT_LINKS (view->document),
1826                                                                             ev_link_action_get_dest (action));
1827                         if (page_label) {
1828                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1829                                 g_free (page_label);
1830                         }
1831                         break;
1832                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1833                         if (title) {
1834                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1835                                                        ev_link_action_get_filename (action));
1836                         } else {
1837                                 msg = g_strdup_printf (_("Go to file “%s”"),
1838                                                        ev_link_action_get_filename (action));
1839                         }
1840                         break;
1841                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1842                         msg = g_strdup (ev_link_action_get_uri (action));
1843                         break;
1844                 case EV_LINK_ACTION_TYPE_LAUNCH:
1845                         msg = g_strdup_printf (_("Launch %s"),
1846                                                ev_link_action_get_filename (action));
1847                         break;
1848                 case EV_LINK_ACTION_TYPE_NAMED:
1849                         msg = tip_from_action_named (action);
1850                         break;
1851                 default:
1852                         if (title)
1853                                 msg = g_strdup (title);
1854                         break;
1855         }
1856
1857         return msg;
1858 }
1859
1860 static void
1861 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1862 {
1863         EvLink       *link;
1864         EvFormField  *field;
1865         EvAnnotation *annot = NULL;
1866
1867         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1868                 return;
1869
1870         if (view->adding_annot) {
1871                 if (view->cursor != EV_VIEW_CURSOR_ADD)
1872                         ev_view_set_cursor (view, EV_VIEW_CURSOR_ADD);
1873                 return;
1874         }
1875
1876         if (view->drag_info.in_drag) {
1877                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1878                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1879                 return;
1880         }
1881
1882         if (view->scroll_info.autoscrolling) {
1883                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1884                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1885                 return;
1886         }
1887
1888         link = ev_view_get_link_at_location (view, x, y);
1889         if (link) {
1890                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1891         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1892                 if (field->is_read_only) {
1893                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1894                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1895                             view->cursor == EV_VIEW_CURSOR_DRAG)
1896                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1897                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1898                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1899                 } else {
1900                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1901                 }
1902         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1903                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1904         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1905                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1906         } else {
1907                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1908                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1909                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1910                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL ||
1911                     view->cursor == EV_VIEW_CURSOR_ADD)
1912                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1913         }
1914
1915         if (link || annot)
1916                 g_object_set (view, "has-tooltip", TRUE, NULL);
1917 }
1918
1919 /*** Images ***/
1920 static EvImage *
1921 ev_view_get_image_at_location (EvView  *view,
1922                                gdouble  x,
1923                                gdouble  y)
1924 {
1925         gint page = -1;
1926         gint x_new = 0, y_new = 0;
1927         EvMappingList *image_mapping;
1928
1929         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1930                 return NULL;
1931
1932         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1933                 return NULL;
1934
1935         image_mapping = ev_page_cache_get_image_mapping (view->page_cache, page);
1936
1937         if (image_mapping)
1938                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1939         else
1940                 return NULL;
1941 }
1942
1943 /*** Forms ***/
1944 static EvFormField *
1945 ev_view_get_form_field_at_location (EvView  *view,
1946                                     gdouble  x,
1947                                     gdouble  y)
1948 {
1949         gint page = -1;
1950         gint x_new = 0, y_new = 0;
1951         EvMappingList *forms_mapping;
1952
1953         if (!EV_IS_DOCUMENT_FORMS (view->document))
1954                 return NULL;
1955
1956         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1957                 return NULL;
1958
1959         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache, page);
1960
1961         if (forms_mapping)
1962                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1963         else
1964                 return NULL;
1965 }
1966
1967 static cairo_region_t *
1968 ev_view_form_field_get_region (EvView      *view,
1969                                EvFormField *field)
1970 {
1971         GdkRectangle   view_area;
1972         EvMappingList *forms_mapping;
1973
1974         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
1975                                                               field->page->index);
1976         ev_view_get_area_from_mapping (view, field->page->index,
1977                                        forms_mapping,
1978                                        field, &view_area);
1979
1980         return cairo_region_create_rectangle (&view_area);
1981 }
1982
1983 static gboolean
1984 ev_view_forms_remove_widgets (EvView *view)
1985 {
1986         ev_view_remove_all (view);
1987
1988         return FALSE;
1989 }
1990
1991 static void
1992 ev_view_form_field_destroy (GtkWidget *widget,
1993                             EvView    *view)
1994 {
1995         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1996 }
1997
1998 static GtkWidget *
1999 ev_view_form_field_button_create_widget (EvView      *view,
2000                                          EvFormField *field)
2001 {
2002         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
2003         cairo_region_t    *field_region = NULL;
2004
2005         switch (field_button->type) {
2006                 case EV_FORM_FIELD_BUTTON_PUSH:
2007                         return NULL;
2008                 case EV_FORM_FIELD_BUTTON_CHECK:
2009                 case EV_FORM_FIELD_BUTTON_RADIO: {
2010                         gboolean       state;
2011                         EvMappingList *forms_mapping;
2012                         GList         *l;
2013
2014                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
2015                                                                                field);
2016
2017                         /* FIXME: it actually depends on NoToggleToOff flags */
2018                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
2019                             state && field_button->state)
2020                                 return NULL;
2021
2022                         field_region = ev_view_form_field_get_region (view, field);
2023
2024                         /* For radio buttons and checkbox buttons that are in a set
2025                          * we need to update also the region for the current selected item
2026                          */
2027                         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2028                                                                               field->page->index);
2029                         for (l = ev_mapping_list_get_list (forms_mapping); l; l = g_list_next (l)) {
2030                                 EvFormField *button = ((EvMapping *)(l->data))->data;
2031                                 cairo_region_t *button_region;
2032
2033                                 if (button->id == field->id)
2034                                         continue;
2035
2036                                 /* FIXME: only buttons in the same group should be updated */
2037                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
2038                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
2039                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
2040                                         continue;
2041
2042                                 button_region = ev_view_form_field_get_region (view, button);
2043                                 cairo_region_union (field_region, button_region);
2044                                 cairo_region_destroy (button_region);
2045                         }
2046
2047                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
2048                                                                        field, !state);
2049                         field_button->state = !state;
2050                 }
2051                         break;
2052         }
2053
2054         ev_view_reload_page (view, field->page->index, field_region);
2055         cairo_region_destroy (field_region);
2056
2057         return NULL;
2058 }
2059
2060 static void
2061 ev_view_form_field_text_save (EvView    *view,
2062                               GtkWidget *widget)
2063 {
2064         EvFormField *field;
2065
2066         if (!view->document)
2067                 return;
2068
2069         field = g_object_get_data (G_OBJECT (widget), "form-field");
2070
2071         if (field->changed) {
2072                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2073                 cairo_region_t  *field_region;
2074
2075                 field_region = ev_view_form_field_get_region (view, field);
2076
2077                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
2078                                                             field, field_text->text);
2079                 field->changed = FALSE;
2080                 ev_view_reload_page (view, field->page->index, field_region);
2081                 cairo_region_destroy (field_region);
2082         }
2083 }
2084
2085 static void
2086 ev_view_form_field_text_changed (GtkWidget   *widget,
2087                                  EvFormField *field)
2088 {
2089         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2090         gchar           *text = NULL;
2091
2092         if (GTK_IS_ENTRY (widget)) {
2093                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
2094         } else if (GTK_IS_TEXT_BUFFER (widget)) {
2095                 GtkTextIter start, end;
2096
2097                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
2098                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
2099                                                  &start, &end, FALSE);
2100         }
2101
2102         if (!field_text->text ||
2103             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
2104                 g_free (field_text->text);
2105                 field_text->text = text;
2106                 field->changed = TRUE;
2107         }
2108 }
2109
2110 static GtkWidget *
2111 ev_view_form_field_text_create_widget (EvView      *view,
2112                                        EvFormField *field)
2113 {
2114         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2115         GtkWidget       *text = NULL;
2116         gchar           *txt;
2117
2118         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2119                                                           field);
2120
2121         switch (field_text->type) {
2122                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2123                         /* TODO */
2124                 case EV_FORM_FIELD_TEXT_NORMAL:
2125                         text = gtk_entry_new ();
2126                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2127                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2128                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2129
2130                         if (txt) {
2131                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2132                                 g_free (txt);
2133                         }
2134
2135                         g_signal_connect (text, "changed",
2136                                           G_CALLBACK (ev_view_form_field_text_changed),
2137                                           field);
2138                         g_signal_connect_after (text, "activate",
2139                                                 G_CALLBACK (ev_view_form_field_destroy),
2140                                                 view);
2141                         break;
2142                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2143                         GtkTextBuffer *buffer;
2144
2145                         text = gtk_text_view_new ();
2146                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2147
2148                         if (txt) {
2149                                 gtk_text_buffer_set_text (buffer, txt, -1);
2150                                 g_free (txt);
2151                         }
2152
2153                         g_signal_connect (buffer, "changed",
2154                                           G_CALLBACK (ev_view_form_field_text_changed),
2155                                           field);
2156                 }
2157                         break;
2158         }
2159
2160         g_object_weak_ref (G_OBJECT (text),
2161                            (GWeakNotify)ev_view_form_field_text_save,
2162                            view);
2163
2164         return text;
2165 }
2166
2167 static void
2168 ev_view_form_field_choice_save (EvView    *view,
2169                                 GtkWidget *widget)
2170 {
2171         EvFormField *field;
2172
2173         if (!view->document)
2174                 return;
2175
2176         field = g_object_get_data (G_OBJECT (widget), "form-field");
2177
2178         if (field->changed) {
2179                 GList             *l;
2180                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2181                 cairo_region_t    *field_region;
2182
2183                 field_region = ev_view_form_field_get_region (view, field);
2184
2185                 if (field_choice->is_editable) {
2186                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2187                                                                       field, field_choice->text);
2188                 } else {
2189                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2190                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2191                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2192                                                                                  field,
2193                                                                                  GPOINTER_TO_INT (l->data));
2194                         }
2195                 }
2196                 field->changed = FALSE;
2197                 ev_view_reload_page (view, field->page->index, field_region);
2198                 cairo_region_destroy (field_region);
2199         }
2200 }
2201
2202 static void
2203 ev_view_form_field_choice_changed (GtkWidget   *widget,
2204                                    EvFormField *field)
2205 {
2206         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2207
2208         if (GTK_IS_COMBO_BOX (widget)) {
2209                 gint item;
2210
2211                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2212                 if (!field_choice->selected_items ||
2213                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2214                         g_list_free (field_choice->selected_items);
2215                         field_choice->selected_items = NULL;
2216                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2217                                                                        GINT_TO_POINTER (item));
2218                         field->changed = TRUE;
2219                 }
2220
2221                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
2222                         gchar *text;
2223
2224                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
2225                         if (!field_choice->text ||
2226                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2227                                 g_free (field_choice->text);
2228                                 field_choice->text = text;
2229                                 field->changed = TRUE;
2230                         }
2231                 }
2232         } else if (GTK_IS_TREE_SELECTION (widget)) {
2233                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2234                 GtkTreeModel     *model;
2235                 GList            *items, *l;
2236
2237                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2238                 g_list_free (field_choice->selected_items);
2239                 field_choice->selected_items = NULL;
2240
2241                 for (l = items; l && l->data; l = g_list_next (l)) {
2242                         GtkTreeIter  iter;
2243                         GtkTreePath *path = (GtkTreePath *)l->data;
2244                         gint         item;
2245
2246                         gtk_tree_model_get_iter (model, &iter, path);
2247                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2248
2249                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2250                                                                        GINT_TO_POINTER (item));
2251
2252                         gtk_tree_path_free (path);
2253                 }
2254
2255                 g_list_free (items);
2256
2257                 field->changed = TRUE;
2258         }
2259 }
2260
2261 static GtkWidget *
2262 ev_view_form_field_choice_create_widget (EvView      *view,
2263                                          EvFormField *field)
2264 {
2265         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2266         GtkWidget         *choice;
2267         GtkTreeModel      *model;
2268         gint               n_items, i;
2269         gint               selected_item = 0;
2270
2271         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2272                                                                    field);
2273         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2274         for (i = 0; i < n_items; i++) {
2275                 GtkTreeIter iter;
2276                 gchar      *item;
2277
2278                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2279                                                                      field, i);
2280                 if (ev_document_forms_form_field_choice_is_item_selected (
2281                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2282                         selected_item = i;
2283                         /* FIXME: we need a get_selected_items function in poppler */
2284                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2285                                                                        GINT_TO_POINTER (i));
2286                 }
2287
2288                 if (item) {
2289                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2290                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2291                                             0, item,
2292                                             1, i,
2293                                             -1);
2294                         g_free (item);
2295                 }
2296         }
2297
2298         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2299                 GtkCellRenderer  *renderer;
2300                 GtkWidget        *tree_view;
2301                 GtkTreeSelection *selection;
2302
2303                 tree_view = gtk_tree_view_new_with_model (model);
2304                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2305
2306                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2307                 if (field_choice->multi_select) {
2308                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2309                 }
2310
2311                 /* TODO: set selected items */
2312
2313                 renderer = gtk_cell_renderer_text_new ();
2314                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2315                                                              0,
2316                                                              "choix", renderer,
2317                                                              "text", 0,
2318                                                              NULL);
2319
2320                 choice = gtk_scrolled_window_new (NULL, NULL);
2321                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2322                                                 GTK_POLICY_AUTOMATIC,
2323                                                 GTK_POLICY_AUTOMATIC);
2324                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2325                 gtk_widget_show (tree_view);
2326
2327                 g_signal_connect (selection, "changed",
2328                                   G_CALLBACK (ev_view_form_field_choice_changed),
2329                                   field);
2330                 g_signal_connect_after (selection, "changed",
2331                                         G_CALLBACK (ev_view_form_field_destroy),
2332                                         view);
2333         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2334                 gchar *text;
2335
2336                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2337                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2338                 if (text) {
2339                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2340                         g_free (text);
2341                 }
2342
2343                 g_signal_connect (choice, "changed",
2344                                   G_CALLBACK (ev_view_form_field_choice_changed),
2345                                   field);
2346                 g_signal_connect_after (gtk_bin_get_child (GTK_BIN (choice)),
2347                                         "activate",
2348                                         G_CALLBACK (ev_view_form_field_destroy),
2349                                         view);
2350         } else { /* ComboBoxText */
2351                 GtkCellRenderer *renderer;
2352
2353                 choice = gtk_combo_box_new_with_model (model);
2354                 renderer = gtk_cell_renderer_text_new ();
2355                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2356                                             renderer, TRUE);
2357                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2358                                                 renderer,
2359                                                 "text", 0,
2360                                                 NULL);
2361                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2362                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2363
2364                 g_signal_connect (choice, "changed",
2365                                   G_CALLBACK (ev_view_form_field_choice_changed),
2366                                   field);
2367                 g_signal_connect_after (choice, "changed",
2368                                         G_CALLBACK (ev_view_form_field_destroy),
2369                                         view);
2370         }
2371
2372         g_object_unref (model);
2373
2374         g_object_weak_ref (G_OBJECT (choice),
2375                            (GWeakNotify)ev_view_form_field_choice_save,
2376                            view);
2377
2378         return choice;
2379 }
2380
2381 static void
2382 ev_view_handle_form_field (EvView      *view,
2383                            EvFormField *field,
2384                            gdouble      x,
2385                            gdouble      y)
2386 {
2387         GtkWidget     *field_widget = NULL;
2388         EvMappingList *form_field_mapping;
2389         GdkRectangle   view_area;
2390
2391         if (field->is_read_only)
2392                 return;
2393
2394         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2395                 field_widget = ev_view_form_field_button_create_widget (view, field);
2396         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2397                 field_widget = ev_view_form_field_text_create_widget (view, field);
2398         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2399                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2400         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2401                 /* TODO */
2402         }
2403
2404         /* Form field doesn't require a widget */
2405         if (!field_widget)
2406                 return;
2407
2408         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2409                                 g_object_ref (field),
2410                                 (GDestroyNotify)g_object_unref);
2411
2412         form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2413                                                                    field->page->index);
2414         ev_view_get_area_from_mapping (view, field->page->index,
2415                                        form_field_mapping,
2416                                        field, &view_area);
2417
2418         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2419         gtk_widget_show (field_widget);
2420         gtk_widget_grab_focus (field_widget);
2421 }
2422
2423 /* Annotations */
2424 static EvViewWindowChild *
2425 ev_view_get_window_child (EvView    *view,
2426                           GtkWidget *window)
2427 {
2428         GList *children = view->window_children;
2429
2430         while (children) {
2431                 EvViewWindowChild *child;
2432
2433                 child = (EvViewWindowChild *)children->data;
2434                 children = children->next;
2435
2436                 if (child->window == window)
2437                         return child;
2438         }
2439
2440         return NULL;
2441 }
2442
2443 static void
2444 ev_view_window_child_move (EvView            *view,
2445                            EvViewWindowChild *child,
2446                            gint               x,
2447                            gint               y)
2448 {
2449         GtkAllocation allocation;
2450         gint          width, height;
2451
2452         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
2453         gtk_window_get_size (GTK_WINDOW (child->window), &width, &height);
2454
2455         child->x = x;
2456         child->y = y;
2457         gtk_window_move (GTK_WINDOW (child->window),
2458                          CLAMP (x, child->parent_x,
2459                                 child->parent_x + allocation.width - width),
2460                          CLAMP (y, child->parent_y,
2461                                 child->parent_y + allocation.height - height));
2462 }
2463
2464 static void
2465 ev_view_window_child_move_with_parent (EvView    *view,
2466                                        GtkWidget *window)
2467 {
2468         EvViewWindowChild *child;
2469         gint               root_x, root_y;
2470
2471         child = ev_view_get_window_child (view, window);
2472         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2473                                &root_x, &root_y);
2474         if (root_x != child->parent_x || root_y != child->parent_y) {
2475                 gint dest_x, dest_y;
2476
2477                 dest_x = child->x + (root_x - child->parent_x);
2478                 dest_y = child->y + (root_y - child->parent_y);
2479                 child->parent_x = root_x;
2480                 child->parent_y = root_y;
2481                 ev_view_window_child_move (view, child, dest_x, dest_y);
2482         }
2483
2484         if (child->visible && !gtk_widget_get_visible (window))
2485                 gtk_widget_show (window);
2486 }
2487
2488 static void
2489 ev_view_window_child_put (EvView    *view,
2490                           GtkWidget *window,
2491                           guint      page,
2492                           gint       x,
2493                           gint       y,
2494                           gdouble    orig_x,
2495                           gdouble    orig_y)
2496 {
2497         EvViewWindowChild *child;
2498         gint               root_x, root_y;
2499
2500         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2501                                &root_x, &root_y);
2502
2503         child = g_new0 (EvViewWindowChild, 1);
2504         child->window = window;
2505         child->page = page;
2506         child->orig_x = orig_x;
2507         child->orig_y = orig_y;
2508         child->parent_x = root_x;
2509         child->parent_y = root_y;
2510         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2511         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2512
2513         if (child->visible)
2514                 gtk_widget_show (window);
2515         else
2516                 gtk_widget_hide (window);
2517
2518         view->window_children = g_list_append (view->window_children, child);
2519 }
2520
2521 static EvViewWindowChild *
2522 ev_view_find_window_child_for_annot (EvView       *view,
2523                                      guint         page,
2524                                      EvAnnotation *annot)
2525 {
2526         GList *children = view->window_children;
2527
2528         while (children) {
2529                 EvViewWindowChild *child;
2530                 EvAnnotation      *wannot;
2531
2532                 child = (EvViewWindowChild *)children->data;
2533                 children = children->next;
2534
2535                 if (child->page != page)
2536                         continue;
2537
2538                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2539                 if (ev_annotation_equal (wannot, annot))
2540                         return child;
2541         }
2542
2543         return NULL;
2544 }
2545
2546 static void
2547 ev_view_window_children_free (EvView *view)
2548 {
2549         GList *l;
2550
2551         if (!view->window_children)
2552                 return;
2553
2554         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2555                 EvViewWindowChild *child;
2556
2557                 child = (EvViewWindowChild *)l->data;
2558                 gtk_widget_destroy (GTK_WIDGET (child->window));
2559                 g_free (child);
2560         }
2561         g_list_free (view->window_children);
2562         view->window_children = NULL;
2563         view->window_child_focus = NULL;
2564 }
2565
2566 static void
2567 annotation_window_grab_focus (GtkWidget *widget,
2568                               EvView    *view)
2569 {
2570         if (view->window_child_focus)
2571                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2572         view->window_child_focus = ev_view_get_window_child (view, widget);
2573 }
2574
2575 static void
2576 annotation_window_closed (EvAnnotationWindow *window,
2577                           EvView             *view)
2578 {
2579         EvViewWindowChild *child;
2580
2581         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2582         child->visible = FALSE;
2583 }
2584
2585 static void
2586 annotation_window_moved (EvAnnotationWindow *window,
2587                          gint                x,
2588                          gint                y,
2589                          EvView             *view)
2590 {
2591         EvViewWindowChild *child;
2592         GdkRectangle       page_area;
2593         GtkBorder          border;
2594         GdkRectangle       view_rect;
2595         EvRectangle        doc_rect;
2596         gint               width, height;
2597
2598         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2599         if (child->x == x && child->y == y)
2600                 return;
2601
2602         child->moved = TRUE;
2603         child->x = x;
2604         child->y = y;
2605
2606         /* Window has been moved by the user,
2607          * we have to set a new origin in doc coords
2608          */
2609         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2610         view_rect.x = (x - child->parent_x) + view->scroll_x;
2611         view_rect.y = (y - child->parent_y) + view->scroll_y;
2612         view_rect.width = width;
2613         view_rect.height = height;
2614
2615         ev_view_get_page_extents (view, child->page, &page_area, &border);
2616         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2617         child->orig_x = doc_rect.x1;
2618         child->orig_y = doc_rect.y1;
2619 }
2620
2621 static void
2622 ev_view_annotation_save_contents (EvView       *view,
2623                                   GParamSpec   *pspec,
2624                                   EvAnnotation *annot)
2625 {
2626         if (!view->document)
2627                 return;
2628
2629         ev_document_doc_mutex_lock ();
2630         ev_document_annotations_save_annotation (EV_DOCUMENT_ANNOTATIONS (view->document),
2631                                                  annot, EV_ANNOTATIONS_SAVE_CONTENTS);
2632         ev_document_doc_mutex_unlock ();
2633 }
2634
2635 static GtkWidget *
2636 ev_view_create_annotation_window (EvView       *view,
2637                                   EvAnnotation *annot,
2638                                   GtkWindow    *parent)
2639 {
2640         GtkWidget   *window;
2641         EvRectangle  doc_rect;
2642         GdkRectangle view_rect;
2643         guint        page;
2644
2645         window = ev_annotation_window_new (annot, parent);
2646         g_signal_connect (window, "grab_focus",
2647                           G_CALLBACK (annotation_window_grab_focus),
2648                           view);
2649         g_signal_connect (window, "closed",
2650                           G_CALLBACK (annotation_window_closed),
2651                           view);
2652         g_signal_connect (window, "moved",
2653                           G_CALLBACK (annotation_window_moved),
2654                           view);
2655         g_signal_connect_swapped (annot, "notify::contents",
2656                                   G_CALLBACK (ev_view_annotation_save_contents),
2657                                   view);
2658         g_object_set_data (G_OBJECT (annot), "popup", window);
2659
2660         page = ev_annotation_get_page_index (annot);
2661         ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window), &doc_rect);
2662         doc_rect_to_view_rect (view, page, &doc_rect, &view_rect);
2663         view_rect.x -= view->scroll_x;
2664         view_rect.y -= view->scroll_y;
2665
2666         ev_view_window_child_put (view, window, page,
2667                                   view_rect.x, view_rect.y,
2668                                   doc_rect.x1, doc_rect.y1);
2669
2670         return window;
2671 }
2672
2673 static void
2674 show_annotation_windows (EvView *view,
2675                          gint    page)
2676 {
2677         EvMappingList *annots;
2678         GList         *l;
2679         GtkWindow     *parent;
2680
2681         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2682
2683         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2684
2685         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2686                 EvAnnotation      *annot;
2687                 EvViewWindowChild *child;
2688                 GtkWidget         *window;
2689
2690                 annot = ((EvMapping *)(l->data))->data;
2691
2692                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2693                         continue;
2694
2695                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2696                         continue;
2697
2698                 window = g_object_get_data (G_OBJECT (annot), "popup");
2699                 if (window) {
2700                         ev_view_window_child_move_with_parent (view, window);
2701                         continue;
2702                 }
2703
2704                 /* Look if we already have a popup for this annot */
2705                 child = ev_view_find_window_child_for_annot (view, page, annot);
2706                 window = child ? child->window : NULL;
2707                 if (window) {
2708                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2709                         g_object_set_data (G_OBJECT (annot), "popup", window);
2710                         ev_view_window_child_move_with_parent (view, window);
2711                 } else {
2712                         ev_view_create_annotation_window (view, annot, parent);
2713                 }
2714         }
2715 }
2716
2717 static void
2718 hide_annotation_windows (EvView *view,
2719                          gint    page)
2720 {
2721         EvMappingList *annots;
2722         GList         *l;
2723
2724         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2725
2726         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2727                 EvAnnotation *annot;
2728                 GtkWidget    *window;
2729
2730                 annot = ((EvMapping *)(l->data))->data;
2731
2732                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2733                         continue;
2734
2735                 window = g_object_get_data (G_OBJECT (annot), "popup");
2736                 if (window)
2737                         gtk_widget_hide (window);
2738         }
2739 }
2740
2741 static EvAnnotation *
2742 ev_view_get_annotation_at_location (EvView  *view,
2743                                     gdouble  x,
2744                                     gdouble  y)
2745 {
2746         gint page = -1;
2747         gint x_new = 0, y_new = 0;
2748         EvMappingList *annotations_mapping;
2749
2750         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2751                 return NULL;
2752
2753         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2754                 return NULL;
2755
2756         annotations_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
2757
2758         if (annotations_mapping)
2759                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2760         else
2761                 return NULL;
2762 }
2763
2764 static void
2765 ev_view_annotation_show_popup_window (EvView    *view,
2766                                       GtkWidget *window)
2767 {
2768         EvViewWindowChild *child;
2769
2770         if (!window)
2771                 return;
2772
2773         child = ev_view_get_window_child (view, window);
2774         if (!child->visible) {
2775                 child->visible = TRUE;
2776                 ev_view_window_child_move (view, child, child->x, child->y);
2777                 gtk_widget_show (window);
2778         }
2779 }
2780
2781 static void
2782 ev_view_handle_annotation (EvView       *view,
2783                            EvAnnotation *annot,
2784                            gdouble       x,
2785                            gdouble       y,
2786                            guint32       timestamp)
2787 {
2788         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2789                 GtkWidget *window;
2790
2791                 window = g_object_get_data (G_OBJECT (annot), "popup");
2792                 ev_view_annotation_show_popup_window (view, window);
2793         }
2794
2795         if (EV_IS_ANNOTATION_ATTACHMENT (annot)) {
2796                 EvAttachment *attachment;
2797
2798                 attachment = ev_annotation_attachment_get_attachment (EV_ANNOTATION_ATTACHMENT (annot));
2799                 if (attachment) {
2800                         GError *error = NULL;
2801
2802                         ev_attachment_open (attachment,
2803                                             gtk_widget_get_screen (GTK_WIDGET (view)),
2804                                             timestamp,
2805                                             &error);
2806
2807                         if (error) {
2808                                 g_warning ("%s", error->message);
2809                                 g_error_free (error);
2810                         }
2811                 }
2812         }
2813 }
2814
2815 static void
2816 ev_view_create_annotation (EvView          *view,
2817                            EvAnnotationType annot_type,
2818                            gint             x,
2819                            gint             y)
2820 {
2821         EvAnnotation   *annot;
2822         GdkPoint        point;
2823         GdkRectangle    page_area;
2824         GtkBorder       border;
2825         EvRectangle     doc_rect, popup_rect;
2826         EvPage         *page;
2827         GdkColor        color = { 0, 65535, 65535, 0 };
2828         GdkRectangle    view_rect;
2829         cairo_region_t *region;
2830
2831         point.x = x;
2832         point.y = y;
2833         ev_view_get_page_extents (view, view->current_page, &page_area, &border);
2834         view_point_to_doc_point (view, &point, &page_area,
2835                                  &doc_rect.x1, &doc_rect.y1);
2836         doc_rect.x2 = doc_rect.x1 + 24;
2837         doc_rect.y2 = doc_rect.y1 + 24;
2838
2839         ev_document_doc_mutex_lock ();
2840         page = ev_document_get_page (view->document, view->current_page);
2841         switch (annot_type) {
2842         case EV_ANNOTATION_TYPE_TEXT:
2843                 annot = ev_annotation_text_new (page);
2844                 break;
2845         case EV_ANNOTATION_TYPE_ATTACHMENT:
2846                 /* TODO */
2847                 g_object_unref (page);
2848                 ev_document_doc_mutex_unlock ();
2849                 return;
2850         default:
2851                 g_assert_not_reached ();
2852         }
2853         g_object_unref (page);
2854
2855         ev_annotation_set_color (annot, &color);
2856
2857         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2858                 popup_rect.x1 = doc_rect.x2;
2859                 popup_rect.x2 = popup_rect.x1 + 200;
2860                 popup_rect.y1 = doc_rect.y2;
2861                 popup_rect.y2 = popup_rect.y1 + 150;
2862                 g_object_set (annot,
2863                               "rectangle", &popup_rect,
2864                               "has_popup", TRUE,
2865                               "popup_is_open", FALSE,
2866                               "label", g_get_real_name (),
2867                               "opacity", 1.0,
2868                               NULL);
2869         }
2870         ev_document_annotations_add_annotation (EV_DOCUMENT_ANNOTATIONS (view->document),
2871                                                 annot, &doc_rect);
2872         ev_document_doc_mutex_unlock ();
2873
2874         /* If the page didn't have annots, mark the cache as dirty */
2875         if (!ev_page_cache_get_annot_mapping (view->page_cache, view->current_page))
2876                 ev_page_cache_mark_dirty (view->page_cache, view->current_page);
2877
2878         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2879                 GtkWindow *parent;
2880                 GtkWidget *window;
2881
2882                 parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2883                 window = ev_view_create_annotation_window (view, annot, parent);
2884
2885                 /* Show the annot window the first time */
2886                 ev_view_annotation_show_popup_window (view, window);
2887         }
2888
2889         doc_rect_to_view_rect (view, view->current_page, &doc_rect, &view_rect);
2890         view_rect.x -= view->scroll_x;
2891         view_rect.y -= view->scroll_y;
2892         region = cairo_region_create_rectangle (&view_rect);
2893         ev_view_reload_page (view, view->current_page, region);
2894         cairo_region_destroy (region);
2895
2896         g_signal_emit (view, signals[SIGNAL_ANNOT_ADDED], 0, annot);
2897 }
2898
2899 void
2900 ev_view_focus_annotation (EvView    *view,
2901                           EvMapping *annot_mapping)
2902 {
2903         GdkRectangle  view_rect;
2904         EvAnnotation *annot;
2905         guint         page;
2906
2907         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2908                 return;
2909
2910         if (view->focus_annotation == annot_mapping)
2911                 return;
2912
2913         view->focus_annotation = annot_mapping;
2914         annot = (EvAnnotation *)annot_mapping->data;
2915
2916         page = ev_annotation_get_page_index (annot);
2917         ev_document_model_set_page (view->model, page);
2918
2919         doc_rect_to_view_rect (view, page,
2920                                &annot_mapping->area, &view_rect);
2921         ensure_rectangle_is_visible (view, &view_rect);
2922         gtk_widget_queue_draw (GTK_WIDGET (view));
2923 }
2924
2925 void
2926 ev_view_begin_add_annotation (EvView          *view,
2927                               EvAnnotationType annot_type)
2928 {
2929         if (annot_type == EV_ANNOTATION_TYPE_UNKNOWN)
2930                 return;
2931
2932         if (view->adding_annot)
2933                 return;
2934
2935         view->adding_annot = TRUE;
2936         view->adding_annot_type = annot_type;
2937         ev_view_set_cursor (view, EV_VIEW_CURSOR_ADD);
2938 }
2939
2940 void
2941 ev_view_cancel_add_annotation (EvView *view)
2942 {
2943         gint x, y;
2944
2945         if (!view->adding_annot)
2946                 return;
2947
2948         view->adding_annot = FALSE;
2949         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
2950         ev_view_handle_cursor_over_xy (view, x, y);
2951 }
2952
2953 static gboolean
2954 ev_view_synctex_backward_search (EvView *view,
2955                                  gdouble x,
2956                                  gdouble y)
2957 {
2958         gint page = -1;
2959         gint x_new = 0, y_new = 0;
2960         EvSourceLink *link;
2961
2962         if (!ev_document_has_synctex (view->document))
2963                 return FALSE;
2964
2965         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2966                 return FALSE;
2967
2968         link = ev_document_synctex_backward_search (view->document, page, x_new, y_new);
2969         if (link) {
2970                 g_signal_emit (view, signals[SIGNAL_SYNC_SOURCE], 0, link);
2971                 g_free (link);
2972
2973                 return TRUE;
2974         }
2975
2976         return FALSE;
2977 }
2978
2979 /*** GtkWidget implementation ***/
2980
2981 static void
2982 ev_view_size_request_continuous_dual_page (EvView         *view,
2983                                            GtkRequisition *requisition)
2984 {
2985         gint n_pages;
2986
2987         n_pages = ev_document_get_n_pages (view->document) + 1;
2988         get_page_y_offset (view, n_pages, &requisition->height);
2989
2990         switch (view->sizing_mode) {
2991                 case EV_SIZING_FIT_WIDTH:
2992                 case EV_SIZING_BEST_FIT:
2993                         requisition->width = 1;
2994
2995                         break;
2996                 case EV_SIZING_FREE: {
2997                         gint max_width;
2998                         GtkBorder border;
2999
3000                         ev_view_get_max_page_size (view, &max_width, NULL);
3001                         compute_border (view, max_width, max_width, &border);
3002                         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
3003                 }
3004                         break;
3005                 default:
3006                         g_assert_not_reached ();
3007         }
3008 }
3009
3010 static void
3011 ev_view_size_request_continuous (EvView         *view,
3012                                  GtkRequisition *requisition)
3013 {
3014         gint n_pages;
3015
3016         n_pages = ev_document_get_n_pages (view->document);
3017         get_page_y_offset (view, n_pages, &requisition->height);
3018
3019         switch (view->sizing_mode) {
3020                 case EV_SIZING_FIT_WIDTH:
3021                 case EV_SIZING_BEST_FIT:
3022                         requisition->width = 1;
3023
3024                         break;
3025                 case EV_SIZING_FREE: {
3026                         gint max_width;
3027                         GtkBorder border;
3028
3029                         ev_view_get_max_page_size (view, &max_width, NULL);
3030                         compute_border (view, max_width, max_width, &border);
3031                         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
3032                 }
3033                         break;
3034                 default:
3035                         g_assert_not_reached ();
3036         }
3037 }
3038
3039 static void
3040 ev_view_size_request_dual_page (EvView         *view,
3041                                 GtkRequisition *requisition)
3042 {
3043         GtkBorder border;
3044         gint width, height;
3045
3046         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
3047                 requisition->width = 1;
3048                 requisition->height = 1;
3049
3050                 return;
3051         }
3052
3053         /* Find the largest of the two. */
3054         ev_view_get_page_size (view,
3055                                view->current_page,
3056                                &width, &height);
3057         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
3058                 gint width_2, height_2;
3059                 ev_view_get_page_size (view,
3060                                        view->current_page + 1,
3061                                        &width_2, &height_2);
3062                 if (width_2 > width) {
3063                         width = width_2;
3064                         height = height_2;
3065                 }
3066         }
3067         compute_border (view, width, height, &border);
3068
3069         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
3070                 ((width + border.left + border.right) * 2) + (view->spacing * 3);
3071         requisition->height = (height + border.top + border.bottom) + (view->spacing * 2);
3072 }
3073
3074 static void
3075 ev_view_size_request_single_page (EvView         *view,
3076                                   GtkRequisition *requisition)
3077 {
3078         GtkBorder border;
3079         gint width, height;
3080
3081         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
3082                 requisition->width = 1;
3083                 requisition->height = 1;
3084
3085                 return;
3086         }
3087
3088         ev_view_get_page_size (view, view->current_page, &width, &height);
3089         compute_border (view, width, height, &border);
3090
3091         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
3092                 width + border.left + border.right + (2 * view->spacing);
3093         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
3094 }
3095
3096 static void
3097 ev_view_size_request (GtkWidget      *widget,
3098                       GtkRequisition *requisition)
3099 {
3100         EvView *view = EV_VIEW (widget);
3101
3102         if (view->document == NULL) {
3103                 view->requisition.width = 1;
3104                 view->requisition.height = 1;
3105
3106                 *requisition = view->requisition;
3107
3108                 return;
3109         }
3110
3111         /* Get zoom for size here when not called from
3112          * ev_view_size_allocate()
3113          */
3114         if (!view->internal_size_request &&
3115             (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3116              view->sizing_mode == EV_SIZING_BEST_FIT)) {
3117                 GtkAllocation allocation;
3118
3119                 gtk_widget_get_allocation (widget, &allocation);
3120                 ev_view_zoom_for_size (view,
3121                                        allocation.width,
3122                                        allocation.height);
3123         }
3124
3125         if (view->continuous && view->dual_page)
3126                 ev_view_size_request_continuous_dual_page (view, &view->requisition);
3127         else if (view->continuous)
3128                 ev_view_size_request_continuous (view, &view->requisition);
3129         else if (view->dual_page)
3130                 ev_view_size_request_dual_page (view, &view->requisition);
3131         else
3132                 ev_view_size_request_single_page (view, &view->requisition);
3133
3134         *requisition = view->requisition;
3135 }
3136
3137 static void
3138 ev_view_size_allocate (GtkWidget      *widget,
3139                        GtkAllocation  *allocation)
3140 {
3141         EvView *view = EV_VIEW (widget);
3142         GList  *children, *l;
3143         gint    root_x, root_y;
3144
3145         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
3146
3147         if (!view->document)
3148                 return;
3149
3150         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3151             view->sizing_mode == EV_SIZING_BEST_FIT) {
3152                 GtkRequisition req;
3153
3154                 ev_view_zoom_for_size (view,
3155                                        allocation->width,
3156                                        allocation->height);
3157                 view->internal_size_request = TRUE;
3158                 ev_view_size_request (widget, &req);
3159                 view->internal_size_request = FALSE;
3160         }
3161
3162         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
3163         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
3164
3165         if (view->document)
3166                 view_update_range_and_current_page (view);
3167
3168         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
3169         view->pending_resize = FALSE;
3170         view->pending_point.x = 0;
3171         view->pending_point.y = 0;
3172
3173         children = gtk_container_get_children (GTK_CONTAINER (widget));
3174         for (l = children; l && l->data; l = g_list_next (l)) {
3175                 EvFormField   *field;
3176                 GdkRectangle   view_area;
3177                 EvMappingList *form_field_mapping;
3178                 GtkAllocation  child_allocation;
3179                 GtkRequisition child_requisition;
3180                 GtkWidget     *child = (GtkWidget *)l->data;
3181
3182                 field = g_object_get_data (G_OBJECT (child), "form-field");
3183                 if (!field)
3184                         continue;
3185
3186                 form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
3187                                                                            field->page->index);
3188                 ev_view_get_area_from_mapping (view, field->page->index,
3189                                                form_field_mapping,
3190                                                field, &view_area);
3191
3192                 gtk_widget_size_request (child, &child_requisition);
3193                 if (child_requisition.width != view_area.width ||
3194                     child_requisition.height != view_area.height)
3195                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
3196
3197                 gtk_container_child_get (GTK_CONTAINER (widget),
3198                                          child,
3199                                          "x", &child_allocation.x,
3200                                          "y", &child_allocation.y,
3201                                          NULL);
3202                 if (child_allocation.x != view_area.x ||
3203                     child_allocation.y != view_area.y) {
3204                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
3205                 }
3206         }
3207         g_list_free (children);
3208
3209         if (view->window_children)
3210                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
3211                                        &root_x, &root_y);
3212
3213         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
3214                 EvViewWindowChild *child;
3215                 EvRectangle        doc_rect;
3216                 GdkRectangle       view_rect;
3217
3218                 child = (EvViewWindowChild *)l->data;
3219
3220                 ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window), &doc_rect);
3221                 if (child->moved) {
3222                         doc_rect.x1 = child->orig_x;
3223                         doc_rect.y1 = child->orig_y;
3224                 }
3225                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
3226                 view_rect.x -= view->scroll_x;
3227                 view_rect.y -= view->scroll_y;
3228
3229                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
3230                         child->parent_x = root_x;
3231                         child->parent_y = root_y;
3232                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
3233                 }
3234         }
3235 }
3236
3237 static void
3238 ev_view_realize (GtkWidget *widget)
3239 {
3240         EvView    *view = EV_VIEW (widget);
3241         GdkWindow *bin_window;
3242         GtkStyle  *style;
3243
3244         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
3245                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
3246
3247         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3248         gdk_window_set_events (bin_window,
3249                                (gdk_window_get_events (bin_window) |
3250                                 GDK_EXPOSURE_MASK |
3251                                 GDK_BUTTON_PRESS_MASK |
3252                                 GDK_BUTTON_RELEASE_MASK |
3253                                 GDK_SCROLL_MASK |
3254                                 GDK_KEY_PRESS_MASK |
3255                                 GDK_POINTER_MOTION_MASK |
3256                                 GDK_POINTER_MOTION_HINT_MASK |
3257                                 GDK_ENTER_NOTIFY_MASK |
3258                                 GDK_LEAVE_NOTIFY_MASK));
3259
3260         style = gtk_widget_get_style (widget);
3261         gdk_window_set_background (bin_window, &style->mid[GTK_STATE_NORMAL]);
3262
3263         on_adjustment_value_changed (NULL, view);
3264 }
3265
3266 static gboolean
3267 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
3268 {
3269         EvView *view = EV_VIEW (widget);
3270         guint state;
3271
3272         state = event->state & gtk_accelerator_get_default_mod_mask ();
3273
3274         if (state == GDK_CONTROL_MASK) {
3275                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
3276                 if (event->direction == GDK_SCROLL_UP ||
3277                     event->direction == GDK_SCROLL_LEFT) {
3278                         if (ev_view_can_zoom_in (view)) {
3279                                 ev_view_zoom_in (view);
3280                         }
3281                 } else {
3282                         if (ev_view_can_zoom_out (view)) {
3283                                 ev_view_zoom_out (view);
3284                         }
3285                 }
3286
3287                 return TRUE;
3288         }
3289
3290         view->jump_to_find_result = FALSE;
3291
3292         /* Shift+Wheel scrolls the in the perpendicular direction */
3293         if (state & GDK_SHIFT_MASK) {
3294                 if (event->direction == GDK_SCROLL_UP)
3295                         event->direction = GDK_SCROLL_LEFT;
3296                 else if (event->direction == GDK_SCROLL_LEFT)
3297                         event->direction = GDK_SCROLL_UP;
3298                 else if (event->direction == GDK_SCROLL_DOWN)
3299                         event->direction = GDK_SCROLL_RIGHT;
3300                 else if (event->direction == GDK_SCROLL_RIGHT)
3301                         event->direction = GDK_SCROLL_DOWN;
3302
3303                 event->state &= ~GDK_SHIFT_MASK;
3304                 state &= ~GDK_SHIFT_MASK;
3305         }
3306
3307         if (state == 0 && view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous) {
3308                 switch (event->direction) {
3309                         case GDK_SCROLL_DOWN:
3310                         case GDK_SCROLL_RIGHT:
3311                                 ev_view_next_page (view);
3312                                 break;
3313                         case GDK_SCROLL_UP:
3314                         case GDK_SCROLL_LEFT:
3315                                 ev_view_previous_page (view);
3316                                 break;
3317                 }
3318
3319                 return TRUE;
3320         }
3321
3322         return FALSE;
3323 }
3324
3325 static EvViewSelection *
3326 find_selection_for_page (EvView *view,
3327                          gint    page)
3328 {
3329         GList *list;
3330
3331         for (list = view->selection_info.selections; list != NULL; list = list->next) {
3332                 EvViewSelection *selection;
3333
3334                 selection = (EvViewSelection *) list->data;
3335
3336                 if (selection->page == page)
3337                         return selection;
3338         }
3339
3340         return NULL;
3341 }
3342
3343 static gboolean
3344 ev_view_expose_event (GtkWidget      *widget,
3345                       GdkEventExpose *event)
3346 {
3347         EvView    *view = EV_VIEW (widget);
3348         GdkWindow *bin_window;
3349         cairo_t   *cr;
3350         gint       i;
3351
3352         if (view->loading) {
3353                 show_loading_window (view);
3354         } else if (view->loading_window &&
3355                    gtk_widget_get_visible (view->loading_window)) {
3356                 ev_view_loading_window_move (view);
3357         }
3358
3359         if (view->document == NULL)
3360                 return FALSE;
3361
3362         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3363         cr = gdk_cairo_create (bin_window);
3364
3365         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3366                 GdkRectangle page_area;
3367                 GtkBorder border;
3368                 gboolean page_ready = TRUE;
3369
3370                 if (!ev_view_get_page_extents (view, i, &page_area, &border))
3371                         continue;
3372
3373                 page_area.x -= view->scroll_x;
3374                 page_area.y -= view->scroll_y;
3375
3376                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
3377
3378                 if (page_ready && view->find_pages && view->highlight_find_results)
3379                         highlight_find_results (view, i);
3380                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3381                         show_annotation_windows (view, i);
3382                 if (page_ready && view->focus_annotation)
3383                         focus_annotation (view, i, &event->area);
3384                 if (page_ready && view->synctex_result)
3385                         highlight_forward_search_results (view, i);
3386         }
3387
3388         cairo_destroy (cr);
3389
3390         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3391                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3392
3393         return FALSE;
3394 }
3395
3396 static gboolean
3397 ev_view_do_popup_menu (EvView *view,
3398                        gdouble x,
3399                        gdouble y)
3400 {
3401         GList        *items = NULL;
3402         EvLink       *link;
3403         EvImage      *image;
3404         EvAnnotation *annot;
3405
3406         image = ev_view_get_image_at_location (view, x, y);
3407         if (image)
3408                 items = g_list_prepend (items, image);
3409
3410         link = ev_view_get_link_at_location (view, x, y);
3411         if (link)
3412                 items = g_list_prepend (items, link);
3413
3414         annot = ev_view_get_annotation_at_location (view, x, y);
3415         if (annot)
3416                 items = g_list_prepend (items, annot);
3417
3418         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, items);
3419
3420         g_list_free (items);
3421
3422         return TRUE;
3423 }
3424
3425 static gboolean
3426 ev_view_popup_menu (GtkWidget *widget)
3427 {
3428         gint x, y;
3429
3430         gtk_widget_get_pointer (widget, &x, &y);
3431         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3432 }
3433
3434 static void
3435 get_link_area (EvView       *view,
3436                gint          x,
3437                gint          y,
3438                EvLink       *link,
3439                GdkRectangle *area)
3440 {
3441         EvMappingList *link_mapping;
3442         gint           page;
3443         gint           x_offset = 0, y_offset = 0;
3444
3445         x += view->scroll_x;
3446         y += view->scroll_y;
3447
3448         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3449
3450         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
3451         ev_view_get_area_from_mapping (view, page,
3452                                        link_mapping,
3453                                        link, area);
3454 }
3455
3456 static void
3457 get_annot_area (EvView       *view,
3458                gint          x,
3459                gint          y,
3460                EvAnnotation *annot,
3461                GdkRectangle *area)
3462 {
3463         EvMappingList *annot_mapping;
3464         gint           page;
3465         gint           x_offset = 0, y_offset = 0;
3466
3467         x += view->scroll_x;
3468         y += view->scroll_y;
3469
3470         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3471
3472         annot_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
3473         ev_view_get_area_from_mapping (view, page,
3474                                        annot_mapping,
3475                                        annot, area);
3476 }
3477
3478 static gboolean
3479 ev_view_query_tooltip (GtkWidget  *widget,
3480                        gint        x,
3481                        gint        y,
3482                        gboolean    keyboard_tip,
3483                        GtkTooltip *tooltip)
3484 {
3485         EvView       *view = EV_VIEW (widget);
3486         EvLink       *link;
3487         EvAnnotation *annot;
3488         gchar        *text;
3489
3490         annot = ev_view_get_annotation_at_location (view, x, y);
3491         if (annot) {
3492                 const gchar *contents;
3493
3494                 if ((contents = ev_annotation_get_contents (annot))) {
3495                         GdkRectangle annot_area;
3496
3497                         get_annot_area (view, x, y, annot, &annot_area);
3498                         gtk_tooltip_set_text (tooltip, contents);
3499                         gtk_tooltip_set_tip_area (tooltip, &annot_area);
3500
3501                         return TRUE;
3502                 }
3503         }
3504
3505         link = ev_view_get_link_at_location (view, x, y);
3506         if (!link)
3507                 return FALSE;
3508
3509         text = tip_from_link (view, link);
3510         if (text && g_utf8_validate (text, -1, NULL)) {
3511                 GdkRectangle link_area;
3512
3513                 get_link_area (view, x, y, link, &link_area);
3514                 gtk_tooltip_set_text (tooltip, text);
3515                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3516         }
3517         g_free (text);
3518
3519         return TRUE;
3520 }
3521
3522 static void
3523 start_selection_for_event (EvView         *view,
3524                            GdkEventButton *event)
3525 {
3526         clear_selection (view);
3527
3528         view->selection_info.start.x = event->x + view->scroll_x;
3529         view->selection_info.start.y = event->y + view->scroll_y;
3530
3531         switch (event->type) {
3532                 case GDK_2BUTTON_PRESS:
3533                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3534                         break;
3535                 case GDK_3BUTTON_PRESS:
3536                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3537                         break;
3538                 default:
3539                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3540                         return;
3541         }
3542
3543         /* In case of WORD or LINE, compute selections now */
3544         compute_selections (view,
3545                             view->selection_info.style,
3546                             &(view->selection_info.start),
3547                             &(view->selection_info.start));
3548 }
3549
3550 static gboolean
3551 ev_view_button_press_event (GtkWidget      *widget,
3552                             GdkEventButton *event)
3553 {
3554         EvView *view = EV_VIEW (widget);
3555
3556         if (!view->document)
3557                 return FALSE;
3558
3559         if (!gtk_widget_has_focus (widget)) {
3560                 gtk_widget_grab_focus (widget);
3561         }
3562
3563         if (view->window_child_focus) {
3564                 EvAnnotationWindow *window;
3565                 EvAnnotation       *annot;
3566
3567                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3568                 annot = ev_annotation_window_get_annotation (window);
3569                 ev_annotation_window_ungrab_focus (window);
3570                 view->window_child_focus = NULL;
3571         }
3572
3573         view->pressed_button = event->button;
3574         view->selection_info.in_drag = FALSE;
3575
3576         if (view->adding_annot)
3577                 return FALSE;
3578
3579         if (view->scroll_info.autoscrolling)
3580                 return TRUE;
3581
3582         switch (event->button) {
3583                 case 1: {
3584                         EvImage *image;
3585                         EvAnnotation *annot;
3586                         EvFormField *field;
3587
3588                         if (event->state & GDK_CONTROL_MASK)
3589                                 return ev_view_synctex_backward_search (view, event->x , event->y);
3590
3591                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3592                                 if (event->type == GDK_3BUTTON_PRESS) {
3593                                         start_selection_for_event (view, event);
3594                                 } else if (location_in_selected_text (view,
3595                                                                event->x + view->scroll_x,
3596                                                                event->y + view->scroll_y)) {
3597                                         view->selection_info.in_drag = TRUE;
3598                                 } else {
3599                                         start_selection_for_event (view, event);
3600                                 }
3601
3602                                 gtk_widget_queue_draw (widget);
3603                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3604                                 ev_view_handle_annotation (view, annot, event->x, event->y, event->time);
3605                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3606                                 ev_view_remove_all (view);
3607                                 ev_view_handle_form_field (view, field, event->x, event->y);
3608                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3609                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3610                                 if (view->image_dnd_info.image)
3611                                         g_object_unref (view->image_dnd_info.image);
3612                                 view->image_dnd_info.image = g_object_ref (image);
3613                                 view->image_dnd_info.in_drag = TRUE;
3614
3615                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3616                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3617                         } else {
3618                                 ev_view_remove_all (view);
3619
3620                                 if (view->synctex_result) {
3621                                         g_free (view->synctex_result);
3622                                         view->synctex_result = NULL;
3623                                         gtk_widget_queue_draw (widget);
3624                                 }
3625
3626                                 if (view->focus_annotation)
3627                                         view->focus_annotation = NULL;
3628
3629                                 if (EV_IS_SELECTION (view->document))
3630                                         start_selection_for_event (view, event);
3631                         }
3632                 }
3633                         return TRUE;
3634                 case 2:
3635                         /* use root coordinates as reference point because
3636                          * scrolling changes window relative coordinates */
3637                         view->drag_info.start.x = event->x_root;
3638                         view->drag_info.start.y = event->y_root;
3639                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3640                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3641
3642                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3643
3644                         return TRUE;
3645                 case 3:
3646                         view->scroll_info.start_y = event->y;
3647                         return ev_view_do_popup_menu (view, event->x, event->y);
3648         }
3649
3650         return FALSE;
3651 }
3652
3653 static void
3654 ev_view_remove_all (EvView *view)
3655 {
3656         GList *children, *child;
3657
3658         children = gtk_container_get_children (GTK_CONTAINER (view));
3659         for (child = children; child && child->data; child = g_list_next (child)) {
3660                 gtk_container_remove (GTK_CONTAINER (view),
3661                                       GTK_WIDGET (child->data));
3662         }
3663         g_list_free (children);
3664 }
3665
3666 /*** Drag and Drop ***/
3667 static void
3668 ev_view_drag_data_get (GtkWidget        *widget,
3669                        GdkDragContext   *context,
3670                        GtkSelectionData *selection_data,
3671                        guint             info,
3672                        guint             time)
3673 {
3674         EvView *view = EV_VIEW (widget);
3675
3676         switch (info) {
3677                 case TARGET_DND_TEXT:
3678                         if (EV_IS_SELECTION (view->document) &&
3679                             view->selection_info.selections) {
3680                                 gchar *text;
3681
3682                                 text = get_selected_text (view);
3683                                 gtk_selection_data_set_text (selection_data,
3684                                                              text,
3685                                                              strlen (text));
3686                                 g_free (text);
3687                         }
3688                         break;
3689                 case TARGET_DND_IMAGE:
3690                         if (view->image_dnd_info.image) {
3691                                 GdkPixbuf *pixbuf;
3692
3693                                 ev_document_doc_mutex_lock ();
3694                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3695                                                                        view->image_dnd_info.image);
3696                                 ev_document_doc_mutex_unlock ();
3697
3698                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3699                                 g_object_unref (pixbuf);
3700                         }
3701                         break;
3702                 case TARGET_DND_URI:
3703                         if (view->image_dnd_info.image) {
3704                                 GdkPixbuf   *pixbuf;
3705                                 const gchar *tmp_uri;
3706                                 gchar       *uris[2];
3707
3708                                 ev_document_doc_mutex_lock ();
3709                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3710                                                                        view->image_dnd_info.image);
3711                                 ev_document_doc_mutex_unlock ();
3712
3713                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3714                                 g_object_unref (pixbuf);
3715
3716                                 uris[0] = (gchar *)tmp_uri;
3717                                 uris[1] = NULL;
3718                                 gtk_selection_data_set_uris (selection_data, uris);
3719                         }
3720         }
3721 }
3722
3723 static gboolean
3724 ev_view_drag_motion (GtkWidget      *widget,
3725                      GdkDragContext *context,
3726                      gint            x,
3727                      gint            y,
3728                      guint           time)
3729 {
3730         if (gtk_drag_get_source_widget (context) == widget)
3731                 gdk_drag_status (context, 0, time);
3732         else
3733                 gdk_drag_status (context, gdk_drag_context_get_suggested_action (context), time);
3734
3735         return TRUE;
3736 }
3737
3738 static gboolean
3739 selection_update_idle_cb (EvView *view)
3740 {
3741         compute_selections (view,
3742                             view->selection_info.style,
3743                             &view->selection_info.start,
3744                             &view->motion);
3745         view->selection_update_id = 0;
3746         return FALSE;
3747 }
3748
3749 static gboolean
3750 selection_scroll_timeout_cb (EvView *view)
3751 {
3752         gint x, y, shift = 0;
3753         GtkWidget *widget = GTK_WIDGET (view);
3754         GtkAllocation allocation;
3755
3756         gtk_widget_get_allocation (widget, &allocation);
3757         gtk_widget_get_pointer (widget, &x, &y);
3758
3759         if (y > allocation.height) {
3760                 shift = (y - allocation.height) / 2;
3761         } else if (y < 0) {
3762                 shift = y / 2;
3763         }
3764
3765         if (shift)
3766                 gtk_adjustment_set_value (view->vadjustment,
3767                                           CLAMP (gtk_adjustment_get_value (view->vadjustment) + shift,
3768                                                  gtk_adjustment_get_lower (view->vadjustment),
3769                                                  gtk_adjustment_get_upper (view->vadjustment) -
3770                                                  gtk_adjustment_get_page_size (view->vadjustment)));
3771
3772         if (x > allocation.width) {
3773                 shift = (x - allocation.width) / 2;
3774         } else if (x < 0) {
3775                 shift = x / 2;
3776         }
3777
3778         if (shift)
3779                 gtk_adjustment_set_value (view->hadjustment,
3780                                           CLAMP (gtk_adjustment_get_value (view->hadjustment) + shift,
3781                                                  gtk_adjustment_get_lower (view->hadjustment),
3782                                                  gtk_adjustment_get_upper (view->hadjustment) -
3783                                                  gtk_adjustment_get_page_size (view->hadjustment)));
3784
3785         return TRUE;
3786 }
3787
3788 static gboolean
3789 ev_view_drag_update_momentum (EvView *view)
3790 {
3791         int i;
3792         if (!view->drag_info.in_drag)
3793                 return FALSE;
3794
3795         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3796                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3797                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3798         }
3799
3800         /* Momentum is a moving average of 10ms granularity over
3801          * the last 100ms with each 10ms stored in buffer.
3802          */
3803
3804         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3805         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3806
3807         return TRUE;
3808 }
3809
3810 static gboolean
3811 ev_view_scroll_drag_release (EvView *view)
3812 {
3813         gdouble dhadj_value, dvadj_value;
3814         gdouble oldhadjustment, oldvadjustment;
3815         gdouble h_page_size, v_page_size;
3816         gdouble h_upper, v_upper;
3817         GtkAllocation allocation;
3818
3819         view->drag_info.momentum.x /= 1.2;
3820         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3821
3822         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
3823
3824         h_page_size = gtk_adjustment_get_page_size (view->hadjustment);
3825         v_page_size = gtk_adjustment_get_page_size (view->vadjustment);
3826
3827         dhadj_value = h_page_size *
3828                       (gdouble)view->drag_info.momentum.x / allocation.width;
3829         dvadj_value = v_page_size *
3830                       (gdouble)view->drag_info.momentum.y / allocation.height;
3831
3832         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3833         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3834
3835         h_upper = gtk_adjustment_get_upper (view->hadjustment);
3836         v_upper = gtk_adjustment_get_upper (view->vadjustment);
3837
3838         /* When we reach the edges, we need either to absorb some momentum and bounce by
3839          * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3840         if (((oldhadjustment + dhadj_value) > (h_upper - h_page_size)) ||
3841             ((oldhadjustment + dhadj_value) < 0))
3842                 view->drag_info.momentum.x = 0;
3843         if (((oldvadjustment + dvadj_value) > (v_upper - v_page_size)) ||
3844             ((oldvadjustment + dvadj_value) < 0))
3845                 view->drag_info.momentum.y = 0;
3846
3847         gtk_adjustment_set_value (view->hadjustment,
3848                                   MIN (oldhadjustment + dhadj_value,
3849                                        h_upper - h_page_size));
3850         gtk_adjustment_set_value (view->vadjustment,
3851                                   MIN (oldvadjustment + dvadj_value,
3852                                        v_upper - v_page_size));
3853
3854         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3855             ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3856                 return FALSE;
3857         else
3858                 return TRUE;
3859 }
3860
3861 static gboolean
3862 ev_view_motion_notify_event (GtkWidget      *widget,
3863                              GdkEventMotion *event)
3864 {
3865         EvView    *view = EV_VIEW (widget);
3866         GdkWindow *bin_window;
3867         gint       x, y;
3868
3869         if (!view->document)
3870                 return FALSE;
3871
3872         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3873
3874         if (event->is_hint || event->window != bin_window) {
3875             gtk_widget_get_pointer (widget, &x, &y);
3876         } else {
3877             x = event->x;
3878             y = event->y;
3879         }
3880
3881         if (view->scroll_info.autoscrolling) {
3882                 view->scroll_info.last_y = y;
3883                 return TRUE;
3884         }
3885
3886         if (view->selection_info.in_drag) {
3887                 if (gtk_drag_check_threshold (widget,
3888                                               view->selection_info.start.x,
3889                                               view->selection_info.start.y,
3890                                               x, y)) {
3891                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3892
3893                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3894
3895                         gtk_drag_begin (widget, target_list,
3896                                         GDK_ACTION_COPY,
3897                                         1, (GdkEvent *)event);
3898
3899                         view->selection_info.in_drag = FALSE;
3900
3901                         gtk_target_list_unref (target_list);
3902
3903                         return TRUE;
3904                 }
3905         } else if (view->image_dnd_info.in_drag) {
3906                 if (gtk_drag_check_threshold (widget,
3907                                               view->selection_info.start.x,
3908                                               view->selection_info.start.y,
3909                                               x, y)) {
3910                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3911
3912                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3913                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3914
3915                         gtk_drag_begin (widget, target_list,
3916                                         GDK_ACTION_COPY,
3917                                         1, (GdkEvent *)event);
3918
3919                         view->image_dnd_info.in_drag = FALSE;
3920
3921                         gtk_target_list_unref (target_list);
3922
3923                         return TRUE;
3924                 }
3925         }
3926
3927         switch (view->pressed_button) {
3928         case 1:
3929                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3930                  * documents only.
3931                  */
3932                 if (view->rotation != 0)
3933                         return FALSE;
3934
3935                 /* Schedule timeout to scroll during selection and additionally
3936                  * scroll once to allow arbitrary speed. */
3937                 if (!view->selection_scroll_id)
3938                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3939                                                                (GSourceFunc)selection_scroll_timeout_cb,
3940                                                                view);
3941                 else
3942                     selection_scroll_timeout_cb (view);
3943
3944                 view->selection_info.in_selection = TRUE;
3945                 view->motion.x = x + view->scroll_x;
3946                 view->motion.y = y + view->scroll_y;
3947
3948                 /* Queue an idle to handle the motion.  We do this because
3949                  * handling any selection events in the motion could be slower
3950                  * than new motion events reach us.  We always put it in the
3951                  * idle to make sure we catch up and don't visibly lag the
3952                  * mouse. */
3953                 if (!view->selection_update_id)
3954                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3955
3956                 return TRUE;
3957         case 2:
3958                 if (!view->drag_info.in_drag) {
3959                         gboolean start;
3960                         int i;
3961
3962                         start = gtk_drag_check_threshold (widget,
3963                                                           view->drag_info.start.x,
3964                                                           view->drag_info.start.y,
3965                                                           event->x_root,
3966                                                           event->y_root);
3967                         view->drag_info.in_drag = start;
3968                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3969                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3970                         /* Set 100 to choose how long it takes to build up momentum */
3971                         /* Clear out previous momentum info: */
3972                         for (i = 0; i < DRAG_HISTORY; i++) {
3973                                 view->drag_info.buffer[i].x = event->x;
3974                                 view->drag_info.buffer[i].y = event->y;
3975                         }
3976                         view->drag_info.momentum.x = 0;
3977                         view->drag_info.momentum.y = 0;
3978                 }
3979
3980                 if (view->drag_info.in_drag) {
3981                         int dx, dy;
3982                         gdouble dhadj_value, dvadj_value;
3983                         GtkAllocation allocation;
3984
3985                         view->drag_info.buffer[0].x = event->x;
3986                         view->drag_info.buffer[0].y = event->y;
3987
3988                         dx = event->x_root - view->drag_info.start.x;
3989                         dy = event->y_root - view->drag_info.start.y;
3990
3991                         gtk_widget_get_allocation (widget, &allocation);
3992
3993                         dhadj_value = gtk_adjustment_get_page_size (view->hadjustment) *
3994                                       (gdouble)dx / allocation.width;
3995                         dvadj_value = gtk_adjustment_get_page_size (view->vadjustment) *
3996                                       (gdouble)dy / allocation.height;
3997
3998                         /* clamp scrolling to visible area */
3999                         gtk_adjustment_set_value (view->hadjustment,
4000                                                   MIN (view->drag_info.hadj - dhadj_value,
4001                                                        gtk_adjustment_get_upper (view->hadjustment) -
4002                                                        gtk_adjustment_get_page_size (view->hadjustment)));
4003                         gtk_adjustment_set_value (view->vadjustment,
4004                                                   MIN (view->drag_info.vadj - dvadj_value,
4005                                                        gtk_adjustment_get_upper (view->vadjustment) -
4006                                                        gtk_adjustment_get_page_size (view->vadjustment)));
4007
4008                         return TRUE;
4009                 }
4010
4011                 break;
4012         default:
4013                 ev_view_handle_cursor_over_xy (view, x, y);
4014         }
4015
4016         return FALSE;
4017 }
4018
4019 static gboolean
4020 ev_view_button_release_event (GtkWidget      *widget,
4021                               GdkEventButton *event)
4022 {
4023         EvView *view = EV_VIEW (widget);
4024         EvLink *link = NULL;
4025
4026         view->image_dnd_info.in_drag = FALSE;
4027
4028         if (view->scroll_info.autoscrolling) {
4029                 ev_view_autoscroll_stop (view);
4030                 view->pressed_button = -1;
4031
4032                 return TRUE;
4033         }
4034
4035         if (view->pressed_button == 1 && event->state & GDK_CONTROL_MASK) {
4036                 view->pressed_button = -1;
4037                 return TRUE;
4038         }
4039
4040         if (view->drag_info.in_drag) {
4041                 view->drag_info.release_timeout_id =
4042                         g_timeout_add (20,
4043                                        (GSourceFunc)ev_view_scroll_drag_release, view);
4044         }
4045
4046         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
4047                 link = ev_view_get_link_at_location (view, event->x, event->y);
4048         }
4049
4050         view->drag_info.in_drag = FALSE;
4051
4052         if (view->adding_annot && view->pressed_button == 1) {
4053                 view->adding_annot = FALSE;
4054                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
4055                 view->pressed_button = -1;
4056
4057                 ev_view_create_annotation (view,
4058                                            view->adding_annot_type,
4059                                            event->x + view->scroll_x,
4060                                            event->y + view->scroll_y);
4061
4062                 return FALSE;
4063         }
4064
4065         if (view->pressed_button == 2) {
4066                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
4067         }
4068
4069         view->pressed_button = -1;
4070
4071         if (view->selection_scroll_id) {
4072             g_source_remove (view->selection_scroll_id);
4073             view->selection_scroll_id = 0;
4074         }
4075         if (view->selection_update_id) {
4076             g_source_remove (view->selection_update_id);
4077             view->selection_update_id = 0;
4078         }
4079
4080         if (view->selection_info.selections) {
4081                 clear_link_selected (view);
4082                 ev_view_update_primary_selection (view);
4083
4084                 if (view->selection_info.in_drag) {
4085                         clear_selection (view);
4086                         gtk_widget_queue_draw (widget);
4087                 }
4088
4089                 view->selection_info.in_drag = FALSE;
4090         } else if (link) {
4091                 if (event->button == 2) {
4092                         EvLinkAction    *action;
4093                         EvLinkActionType type;
4094
4095                         action = ev_link_get_action (link);
4096                         if (!action)
4097                                 return FALSE;
4098
4099                         type = ev_link_action_get_action_type (action);
4100                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
4101                                 g_signal_emit (view,
4102                                                signals[SIGNAL_EXTERNAL_LINK],
4103                                                0, action);
4104                         }
4105                 } else {
4106                         ev_view_handle_link (view, link);
4107                 }
4108         }
4109
4110         return FALSE;
4111 }
4112
4113 static gboolean
4114 ev_view_key_press_event (GtkWidget   *widget,
4115                          GdkEventKey *event)
4116 {
4117         EvView *view = EV_VIEW (widget);
4118
4119         if (!view->document)
4120                 return FALSE;
4121
4122         if (!gtk_widget_has_focus (widget)) {
4123                 /* Forward key events to current focused window child */
4124                 if (view->window_child_focus) {
4125                         GdkEventKey *new_event;
4126                         gboolean     handled;
4127
4128                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
4129                         g_object_unref (new_event->window);
4130                         new_event->window = gtk_widget_get_window (view->window_child_focus->window);
4131                         if (new_event->window)
4132                                 g_object_ref (new_event->window);
4133                         gtk_widget_realize (view->window_child_focus->window);
4134                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
4135                         gdk_event_free ((GdkEvent *)new_event);
4136
4137                         return handled;
4138                 }
4139
4140                 return FALSE;
4141         }
4142
4143         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4144 }
4145
4146 static gint
4147 ev_view_focus_in (GtkWidget     *widget,
4148                   GdkEventFocus *event)
4149 {
4150         if (EV_VIEW (widget)->pixbuf_cache)
4151                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4152         gtk_widget_queue_draw (widget);
4153
4154         return FALSE;
4155 }
4156
4157 static gint
4158 ev_view_focus_out (GtkWidget     *widget,
4159                    GdkEventFocus *event)
4160 {
4161         if (EV_VIEW (widget)->pixbuf_cache)
4162                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4163         gtk_widget_queue_draw (widget);
4164
4165         return FALSE;
4166 }
4167
4168 static gboolean
4169 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4170 {
4171         EvView *view = EV_VIEW (widget);
4172
4173         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4174                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4175
4176         return FALSE;
4177 }
4178
4179 static gboolean
4180 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4181 {
4182         EvView *view = EV_VIEW (widget);
4183
4184         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4185
4186         return FALSE;
4187 }
4188
4189 static void
4190 ev_view_style_set (GtkWidget *widget,
4191                    GtkStyle  *old_style)
4192 {
4193         if (EV_VIEW (widget)->pixbuf_cache)
4194                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4195
4196         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
4197 }
4198
4199 /*** Drawing ***/
4200
4201 static void
4202 draw_rubberband (EvView             *view,
4203                  GdkWindow          *window,
4204                  const GdkRectangle *rect,
4205                  gdouble             alpha)
4206 {
4207         GtkStyle *style;
4208         GdkColor *fill_color_gdk;
4209         gdouble   r, g, b;
4210         cairo_t  *cr;
4211
4212         style = gtk_widget_get_style (GTK_WIDGET (view));
4213         fill_color_gdk = gdk_color_copy (&style->base[GTK_STATE_SELECTED]);
4214         r = fill_color_gdk->red / 65535.;
4215         g = fill_color_gdk->green / 65535.;
4216         b = fill_color_gdk->blue / 65535.;
4217
4218         cr = gdk_cairo_create (window);
4219
4220         cairo_set_source_rgba (cr, r, g, b, alpha);
4221         cairo_rectangle (cr,
4222                          rect->x - view->scroll_x,
4223                          rect->y - view->scroll_y,
4224                          rect->width, rect->height);
4225         cairo_fill_preserve (cr);
4226
4227         cairo_set_line_width (cr, 0.5);
4228         cairo_set_source_rgb (cr, r, g, b);
4229         cairo_stroke (cr);
4230
4231         cairo_destroy (cr);
4232
4233         gdk_color_free (fill_color_gdk);
4234 }
4235
4236
4237 static void
4238 highlight_find_results (EvView *view, int page)
4239 {
4240         gint       i, n_results = 0;
4241         GdkWindow *bin_window;
4242
4243         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4244
4245         n_results = ev_view_find_get_n_results (view, page);
4246
4247         for (i = 0; i < n_results; i++) {
4248                 EvRectangle *rectangle;
4249                 GdkRectangle view_rectangle;
4250                 gdouble      alpha;
4251
4252                 if (i == view->find_result && page == view->current_page) {
4253                         alpha = 0.6;
4254                 } else {
4255                         alpha = 0.3;
4256                 }
4257
4258                 rectangle = ev_view_find_get_result (view, page, i);
4259                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4260                 draw_rubberband (view, bin_window, &view_rectangle, alpha);
4261         }
4262 }
4263
4264 static void
4265 highlight_forward_search_results (EvView *view, int page)
4266 {
4267         GdkWindow   *bin_window;
4268         GdkRectangle rect;
4269         cairo_t     *cr;
4270         EvMapping   *mapping = view->synctex_result;
4271
4272         if (GPOINTER_TO_INT (mapping->data) != page)
4273                 return;
4274
4275         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4276         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4277
4278         cr = gdk_cairo_create (bin_window);
4279         cairo_set_source_rgb (cr, 1., 0., 0.);
4280         cairo_rectangle (cr,
4281                          rect.x - view->scroll_x,
4282                          rect.y - view->scroll_y,
4283                          rect.width, rect.height);
4284         cairo_stroke (cr);
4285         cairo_destroy (cr);
4286 }
4287
4288 static void
4289 focus_annotation (EvView       *view,
4290                   gint          page,
4291                   GdkRectangle *clip)
4292 {
4293         GtkWidget    *widget = GTK_WIDGET (view);
4294         GdkRectangle  rect;
4295         EvMapping    *mapping = view->focus_annotation;
4296         EvAnnotation *annot = (EvAnnotation *)mapping->data;
4297
4298         if (ev_annotation_get_page_index (annot) != page)
4299                 return;
4300
4301         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4302         gtk_paint_focus (gtk_widget_get_style (widget),
4303                          gtk_layout_get_bin_window (GTK_LAYOUT (view)),
4304                          gtk_widget_get_state (widget),
4305                          NULL, widget, NULL,
4306                          rect.x - view->scroll_x,
4307                          rect.y - view->scroll_y,
4308                          rect.width + 1, rect.height + 1);
4309 }
4310
4311 static void
4312 ev_view_loading_window_move (EvView *view)
4313 {
4314         GtkWidget       *widget = GTK_WIDGET (view);
4315         EvLoadingWindow *window = EV_LOADING_WINDOW (view->loading_window);
4316         gint             root_x, root_y;
4317         gint             window_width;
4318         GtkAllocation    allocation;
4319
4320         gtk_widget_get_allocation (widget, &allocation);
4321         gdk_window_get_origin (gtk_widget_get_window (widget), &root_x, &root_y);
4322         ev_loading_window_get_size (window, &window_width, NULL);
4323
4324         root_x += allocation.width - window_width - 10;
4325         root_y += 10;
4326
4327         ev_loading_window_move (window, root_x, root_y);
4328 }
4329
4330 static gboolean
4331 show_loading_window_cb (EvView *view)
4332 {
4333         if (!view->loading_window) {
4334                 GtkWindow *parent;
4335                 GdkScreen *screen;
4336
4337                 parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
4338                 view->loading_window = ev_loading_window_new (parent);
4339
4340                 /* Show the window off screen to get a valid size asap */
4341                 screen = gtk_widget_get_screen (GTK_WIDGET (view));
4342                 gtk_window_move (GTK_WINDOW (view->loading_window),
4343                                  gdk_screen_get_width (screen) + 1,
4344                                  gdk_screen_get_height (screen) + 1);
4345                 gtk_widget_show (view->loading_window);
4346         }
4347
4348         ev_view_loading_window_move (view);
4349
4350         gtk_widget_show (view->loading_window);
4351
4352         view->loading_timeout = 0;
4353
4354         return FALSE;
4355 }
4356
4357 static void
4358 show_loading_window (EvView *view)
4359 {
4360         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4361                 ev_view_loading_window_move (view);
4362                 return;
4363         }
4364
4365         if (!view->loading_timeout) {
4366                 view->loading_timeout =
4367                         g_timeout_add_full (G_PRIORITY_LOW,
4368                                             0.5, (GSourceFunc)show_loading_window_cb,
4369                                             view, NULL);
4370         }
4371 }
4372
4373 static void
4374 hide_loading_window (EvView *view)
4375 {
4376         if (view->loading_timeout) {
4377                 g_source_remove (view->loading_timeout);
4378                 view->loading_timeout = 0;
4379         }
4380
4381         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4382                 gtk_widget_hide (view->loading_window);
4383         }
4384 }
4385
4386 static void
4387 draw_one_page (EvView       *view,
4388                gint          page,
4389                cairo_t      *cr,
4390                GdkRectangle *page_area,
4391                GtkBorder    *border,
4392                GdkRectangle *expose_area,
4393                gboolean     *page_ready)
4394 {
4395         GdkRectangle overlap;
4396         GdkRectangle real_page_area;
4397         gint         current_page;
4398         gboolean     inverted_colors;
4399
4400         g_assert (view->document);
4401
4402         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4403                 return;
4404
4405         /* Render the document itself */
4406         real_page_area = *page_area;
4407
4408         real_page_area.x += border->left;
4409         real_page_area.y += border->top;
4410         real_page_area.width -= (border->left + border->right);
4411         real_page_area.height -= (border->top + border->bottom);
4412         *page_ready = TRUE;
4413
4414         current_page = ev_document_model_get_page (view->model);
4415         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4416         ev_document_misc_paint_one_page (cr,
4417                                          GTK_WIDGET (view),
4418                                          page_area, border,
4419                                          page == current_page,
4420                                          inverted_colors);
4421
4422         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4423                 gint             width, height;
4424                 gint             page_width, page_height;
4425                 cairo_surface_t *page_surface = NULL;
4426                 gint             selection_width, selection_height;
4427                 cairo_surface_t *selection_surface = NULL;
4428
4429                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4430
4431                 if (!page_surface) {
4432                         if (page == current_page)
4433                                 show_loading_window (view);
4434
4435                         *page_ready = FALSE;
4436
4437                         return;
4438                 }
4439
4440                 if (page == current_page)
4441                         hide_loading_window (view);
4442
4443                 ev_view_get_page_size (view, page, &width, &height);
4444
4445                 page_width = cairo_image_surface_get_width (page_surface);
4446                 page_height = cairo_image_surface_get_height (page_surface);
4447
4448                 cairo_save (cr);
4449                 cairo_translate (cr, overlap.x, overlap.y);
4450
4451                 if (width != page_width || height != page_height) {
4452                         cairo_pattern_set_filter (cairo_get_source (cr),
4453                                                   CAIRO_FILTER_FAST);
4454                         cairo_scale (cr,
4455                                      (gdouble)width / page_width,
4456                                      (gdouble)height / page_height);
4457                 }
4458
4459                 cairo_surface_set_device_offset (page_surface,
4460                                                  overlap.x - real_page_area.x,
4461                                                  overlap.y - real_page_area.y);
4462                 cairo_set_source_surface (cr, page_surface, 0, 0);
4463                 cairo_paint (cr);
4464                 cairo_restore (cr);
4465
4466                 /* Get the selection pixbuf iff we have something to draw */
4467                 if (find_selection_for_page (view, page) &&
4468                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4469                         selection_surface =
4470                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4471                                                                        page,
4472                                                                        view->scale,
4473                                                                        NULL);
4474                 }
4475
4476                 if (!selection_surface) {
4477                         return;
4478                 }
4479
4480                 selection_width = cairo_image_surface_get_width (selection_surface);
4481                 selection_height = cairo_image_surface_get_height (selection_surface);
4482
4483                 cairo_save (cr);
4484                 cairo_translate (cr, overlap.x, overlap.y);
4485
4486                 if (width != selection_width || height != selection_height) {
4487                         cairo_pattern_set_filter (cairo_get_source (cr),
4488                                                   CAIRO_FILTER_FAST);
4489                         cairo_scale (cr,
4490                                      (gdouble)width / selection_width,
4491                                      (gdouble)height / selection_height);
4492                 }
4493
4494                 cairo_surface_set_device_offset (selection_surface,
4495                                                  overlap.x - real_page_area.x,
4496                                                  overlap.y - real_page_area.y);
4497
4498                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4499                 cairo_paint (cr);
4500                 cairo_restore (cr);
4501         }
4502 }
4503
4504 /*** GObject functions ***/
4505
4506 static void
4507 ev_view_finalize (GObject *object)
4508 {
4509         EvView *view = EV_VIEW (object);
4510
4511         clear_selection (view);
4512         clear_link_selected (view);
4513
4514         if (view->synctex_result) {
4515                 g_free (view->synctex_result);
4516                 view->synctex_result = NULL;
4517         }
4518
4519         if (view->image_dnd_info.image)
4520                 g_object_unref (view->image_dnd_info.image);
4521         view->image_dnd_info.image = NULL;
4522
4523         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4524 }
4525
4526 static void
4527 ev_view_destroy (GtkObject *object)
4528 {
4529         EvView *view = EV_VIEW (object);
4530
4531         if (view->model) {
4532                 g_object_unref (view->model);
4533                 view->model = NULL;
4534         }
4535
4536         if (view->pixbuf_cache) {
4537                 g_object_unref (view->pixbuf_cache);
4538                 view->pixbuf_cache = NULL;
4539         }
4540
4541         if (view->document) {
4542                 g_object_unref (view->document);
4543                 view->document = NULL;
4544         }
4545
4546         if (view->page_cache) {
4547                 g_object_unref (view->page_cache);
4548                 view->page_cache = NULL;
4549         }
4550
4551         ev_view_window_children_free (view);
4552
4553         if (view->selection_scroll_id) {
4554             g_source_remove (view->selection_scroll_id);
4555             view->selection_scroll_id = 0;
4556         }
4557
4558         if (view->selection_update_id) {
4559             g_source_remove (view->selection_update_id);
4560             view->selection_update_id = 0;
4561         }
4562
4563         if (view->scroll_info.timeout_id) {
4564             g_source_remove (view->scroll_info.timeout_id);
4565             view->scroll_info.timeout_id = 0;
4566         }
4567
4568         if (view->drag_info.drag_timeout_id) {
4569                 g_source_remove (view->drag_info.drag_timeout_id);
4570                 view->drag_info.drag_timeout_id = 0;
4571         }
4572
4573         if (view->drag_info.release_timeout_id) {
4574                 g_source_remove (view->drag_info.release_timeout_id);
4575                 view->drag_info.release_timeout_id = 0;
4576         }
4577
4578         if (view->loading_timeout) {
4579                 g_source_remove (view->loading_timeout);
4580                 view->loading_timeout = 0;
4581         }
4582
4583         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4584
4585         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4586 }
4587
4588 static AtkObject *
4589 ev_view_get_accessible (GtkWidget *widget)
4590 {
4591         static gboolean first_time = TRUE;
4592
4593         if (first_time) {
4594                 AtkObjectFactory *factory;
4595                 AtkRegistry *registry;
4596                 GType derived_type;
4597                 GType derived_atk_type;
4598
4599                 /*
4600                  * Figure out whether accessibility is enabled by looking at the
4601                  * type of the accessible object which would be created for
4602                  * the parent type of EvView.
4603                  */
4604                 derived_type = g_type_parent (EV_TYPE_VIEW);
4605
4606                 registry = atk_get_default_registry ();
4607                 factory = atk_registry_get_factory (registry,
4608                                                     derived_type);
4609                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4610                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE)) {
4611                         atk_registry_set_factory_type (registry,
4612                                                        EV_TYPE_VIEW,
4613                                                        ev_view_accessible_factory_get_type ());
4614                         EV_VIEW (widget)->a11y_enabled = TRUE;
4615                 }
4616                 first_time = FALSE;
4617         }
4618         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4619 }
4620
4621 static void
4622 ev_view_class_init (EvViewClass *class)
4623 {
4624         GObjectClass *object_class = G_OBJECT_CLASS (class);
4625         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4626         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4627         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4628         GtkBindingSet *binding_set;
4629
4630         object_class->finalize = ev_view_finalize;
4631
4632         widget_class->expose_event = ev_view_expose_event;
4633         widget_class->button_press_event = ev_view_button_press_event;
4634         widget_class->motion_notify_event = ev_view_motion_notify_event;
4635         widget_class->button_release_event = ev_view_button_release_event;
4636         widget_class->key_press_event = ev_view_key_press_event;
4637         widget_class->focus_in_event = ev_view_focus_in;
4638         widget_class->focus_out_event = ev_view_focus_out;
4639         widget_class->get_accessible = ev_view_get_accessible;
4640         widget_class->size_request = ev_view_size_request;
4641         widget_class->size_allocate = ev_view_size_allocate;
4642         widget_class->realize = ev_view_realize;
4643         widget_class->scroll_event = ev_view_scroll_event;
4644         widget_class->enter_notify_event = ev_view_enter_notify_event;
4645         widget_class->leave_notify_event = ev_view_leave_notify_event;
4646         widget_class->style_set = ev_view_style_set;
4647         widget_class->drag_data_get = ev_view_drag_data_get;
4648         widget_class->drag_motion = ev_view_drag_motion;
4649         widget_class->popup_menu = ev_view_popup_menu;
4650         widget_class->query_tooltip = ev_view_query_tooltip;
4651
4652         gtk_object_class->destroy = ev_view_destroy;
4653
4654         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4655
4656         class->binding_activated = ev_view_scroll;
4657
4658         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4659                          G_TYPE_FROM_CLASS (object_class),
4660                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4661                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4662                          NULL, NULL,
4663                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4664                          G_TYPE_NONE, 2,
4665                          GTK_TYPE_SCROLL_TYPE,
4666                          G_TYPE_BOOLEAN);
4667         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4668                          G_TYPE_FROM_CLASS (object_class),
4669                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4670                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4671                          NULL, NULL,
4672                          g_cclosure_marshal_VOID__OBJECT,
4673                          G_TYPE_NONE, 1,
4674                          G_TYPE_OBJECT);
4675         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4676                          G_TYPE_FROM_CLASS (object_class),
4677                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4678                          G_STRUCT_OFFSET (EvViewClass, external_link),
4679                          NULL, NULL,
4680                          g_cclosure_marshal_VOID__OBJECT,
4681                          G_TYPE_NONE, 1,
4682                          G_TYPE_OBJECT);
4683         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4684                          G_TYPE_FROM_CLASS (object_class),
4685                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4686                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4687                          NULL, NULL,
4688                          g_cclosure_marshal_VOID__POINTER,
4689                          G_TYPE_NONE, 1,
4690                          G_TYPE_POINTER);
4691         signals[SIGNAL_SELECTION_CHANGED] = g_signal_new ("selection-changed",
4692                          G_TYPE_FROM_CLASS (object_class),
4693                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4694                          G_STRUCT_OFFSET (EvViewClass, selection_changed),
4695                          NULL, NULL,
4696                          g_cclosure_marshal_VOID__VOID,
4697                          G_TYPE_NONE, 0,
4698                          G_TYPE_NONE);
4699         signals[SIGNAL_SYNC_SOURCE] = g_signal_new ("sync-source",
4700                          G_TYPE_FROM_CLASS (object_class),
4701                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4702                          G_STRUCT_OFFSET (EvViewClass, sync_source),
4703                          NULL, NULL,
4704                          g_cclosure_marshal_VOID__POINTER,
4705                          G_TYPE_NONE, 1,
4706                          G_TYPE_POINTER);
4707         signals[SIGNAL_ANNOT_ADDED] = g_signal_new ("annot-added",
4708                          G_TYPE_FROM_CLASS (object_class),
4709                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4710                          G_STRUCT_OFFSET (EvViewClass, annot_added),
4711                          NULL, NULL,
4712                          g_cclosure_marshal_VOID__OBJECT,
4713                          G_TYPE_NONE, 1,
4714                          EV_TYPE_ANNOTATION);
4715         signals[SIGNAL_LAYERS_CHANGED] = g_signal_new ("layers-changed",
4716                          G_TYPE_FROM_CLASS (object_class),
4717                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4718                          G_STRUCT_OFFSET (EvViewClass, layers_changed),
4719                          NULL, NULL,
4720                          g_cclosure_marshal_VOID__VOID,
4721                          G_TYPE_NONE, 0,
4722                          G_TYPE_NONE);
4723
4724         binding_set = gtk_binding_set_by_class (class);
4725
4726         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4727         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4728         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4729         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4730         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4731         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4732         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4733         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4734         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4735                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4736         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4737                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4738         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4739                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4740         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4741                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4742
4743 }
4744
4745 static void
4746 ev_view_init (EvView *view)
4747 {
4748         gtk_widget_set_can_focus (GTK_WIDGET (view), TRUE);
4749
4750         view->start_page = -1;
4751         view->end_page = -1;
4752         view->spacing = 5;
4753         view->scale = 1.0;
4754         view->current_page = 0;
4755         view->pressed_button = -1;
4756         view->cursor = EV_VIEW_CURSOR_NORMAL;
4757         view->drag_info.in_drag = FALSE;
4758         view->scroll_info.autoscrolling = FALSE;
4759         view->selection_info.selections = NULL;
4760         view->selection_info.in_selection = FALSE;
4761         view->selection_info.in_drag = FALSE;
4762         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4763         view->continuous = TRUE;
4764         view->dual_page = FALSE;
4765         view->fullscreen = FALSE;
4766         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4767         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4768         view->jump_to_find_result = TRUE;
4769         view->highlight_find_results = FALSE;
4770
4771         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4772         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4773 }
4774
4775 /*** Callbacks ***/
4776
4777 static void
4778 ev_view_change_page (EvView *view,
4779                      gint    new_page)
4780 {
4781         gint x, y;
4782
4783         view->current_page = new_page;
4784         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4785
4786         hide_loading_window (view);
4787
4788         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4789         ev_view_handle_cursor_over_xy (view, x, y);
4790
4791         gtk_widget_queue_resize (GTK_WIDGET (view));
4792 }
4793
4794 static void
4795 job_finished_cb (EvPixbufCache  *pixbuf_cache,
4796                  cairo_region_t *region,
4797                  EvView         *view)
4798 {
4799         if (region) {
4800                 GdkWindow *bin_window;
4801
4802                 bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4803 #if GTK_CHECK_VERSION(2, 90, 5)
4804                 gdk_window_invalidate_region (bin_window, region, TRUE);
4805 #else
4806         {
4807                 GdkRegion *gdk_region = gdk_region_new ();
4808                 guint      n_recs = cairo_region_num_rectangles (region);
4809                 guint      i;
4810
4811                 for (i = 0; i < n_recs; i++) {
4812                         cairo_rectangle_int_t rect;
4813
4814                         cairo_region_get_rectangle (region, i, &rect);
4815                         gdk_region_union_with_rect (gdk_region, (GdkRectangle *)&rect);
4816                 }
4817                 gdk_window_invalidate_region (bin_window, gdk_region, TRUE);
4818                 gdk_region_destroy (gdk_region);
4819         }
4820 #endif
4821         } else {
4822                 gtk_widget_queue_draw (GTK_WIDGET (view));
4823         }
4824 }
4825
4826 static void
4827 ev_view_page_changed_cb (EvDocumentModel *model,
4828                          gint             old_page,
4829                          gint             new_page,
4830                          EvView          *view)
4831 {
4832         if (!view->document)
4833                 return;
4834
4835         if (view->current_page != new_page) {
4836                 ev_view_change_page (view, new_page);
4837         } else {
4838                 gtk_widget_queue_draw (GTK_WIDGET (view));
4839         }
4840
4841         view->find_result = 0;
4842 }
4843
4844 static void
4845 on_adjustment_value_changed (GtkAdjustment *adjustment,
4846                              EvView        *view)
4847 {
4848         int dx = 0, dy = 0;
4849         gint x, y;
4850         gint value;
4851         GList *children, *l;
4852
4853         if (!gtk_widget_get_realized (GTK_WIDGET (view)))
4854                 return;
4855
4856         if (view->hadjustment) {
4857                 value = (gint) gtk_adjustment_get_value (view->hadjustment);
4858                 dx = view->scroll_x - value;
4859                 view->scroll_x = value;
4860         } else {
4861                 view->scroll_x = 0;
4862         }
4863
4864         if (view->vadjustment) {
4865                 value = (gint) gtk_adjustment_get_value (view->vadjustment);
4866                 dy = view->scroll_y - value;
4867                 view->scroll_y = value;
4868         } else {
4869                 view->scroll_y = 0;
4870         }
4871
4872         children = gtk_container_get_children (GTK_CONTAINER (view));
4873         for (l = children; l && l->data; l = g_list_next (l)) {
4874                 gint       child_x, child_y;
4875                 GtkWidget *child = (GtkWidget *)l->data;
4876
4877                 gtk_container_child_get (GTK_CONTAINER (view),
4878                                          child,
4879                                          "x", &child_x,
4880                                          "y", &child_y,
4881                                          NULL);
4882                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4883         }
4884         g_list_free (children);
4885
4886         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4887                 EvViewWindowChild *child;
4888
4889                 child = (EvViewWindowChild *)l->data;
4890
4891                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4892         }
4893
4894         if (view->pending_resize) {
4895                 gtk_widget_queue_draw (GTK_WIDGET (view));
4896         } else {
4897                 GdkWindow *bin_window;
4898
4899                 bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4900                 gdk_window_scroll (bin_window, dx, dy);
4901         }
4902
4903         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4904         ev_view_handle_cursor_over_xy (view, x, y);
4905
4906         if (view->document)
4907                 view_update_range_and_current_page (view);
4908 }
4909
4910 GtkWidget*
4911 ev_view_new (void)
4912 {
4913         GtkWidget *view;
4914
4915         view = g_object_new (EV_TYPE_VIEW, NULL);
4916
4917         return view;
4918 }
4919
4920 static void
4921 setup_caches (EvView *view)
4922 {
4923         gboolean inverted_colors;
4924
4925         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
4926         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->model, view->pixbuf_cache_size);
4927         view->page_cache = ev_page_cache_new (view->document);
4928         if (view->a11y_enabled) {
4929                 EvJobPageDataFlags flags = ev_page_cache_get_flags (view->page_cache);
4930
4931                 ev_page_cache_set_flags (view->page_cache,
4932                                          flags |
4933                                          EV_PAGE_DATA_INCLUDE_TEXT_LAYOUT |
4934                                          EV_PAGE_DATA_INCLUDE_TEXT);
4935         }
4936         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4937         ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
4938         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4939 }
4940
4941 static void
4942 clear_caches (EvView *view)
4943 {
4944         if (view->pixbuf_cache) {
4945                 g_object_unref (view->pixbuf_cache);
4946                 view->pixbuf_cache = NULL;
4947         }
4948
4949         if (view->page_cache) {
4950                 g_object_unref (view->page_cache);
4951                 view->page_cache = NULL;
4952         }
4953 }
4954
4955 /**
4956  * ev_view_set_page_cache_size:
4957  * @view:
4958  * @cache_size:
4959  *
4960  * Sets the maximum size in bytes that will be used to cache
4961  * rendered pages. Use 0 to disable caching rendered pages.
4962  *
4963  * Note that this limit doesn't affect the current visible page range,
4964  * which will always be rendered. In order to limit the total memory used
4965  * you have to use ev_document_model_set_max_scale() too.
4966  *
4967  */
4968 void
4969 ev_view_set_page_cache_size (EvView *view,
4970                              gsize   cache_size)
4971 {
4972         if (view->pixbuf_cache_size == cache_size)
4973                 return;
4974
4975         view->pixbuf_cache_size = cache_size;
4976         if (view->pixbuf_cache)
4977                 ev_pixbuf_cache_set_max_size (view->pixbuf_cache, cache_size);
4978 }
4979
4980 void
4981 ev_view_set_loading (EvView       *view,
4982                      gboolean      loading)
4983 {
4984         if (view->loading && !loading)
4985                 hide_loading_window (view);
4986         view->loading = loading;
4987         gtk_widget_queue_draw (GTK_WIDGET (view));
4988 }
4989
4990 static gboolean
4991 ev_view_autoscroll_cb (EvView *view)
4992 {
4993         gdouble speed, value;
4994
4995         /* If the user stops autoscrolling, autoscrolling will be
4996          * set to false but the timeout will continue; stop the timeout: */
4997         if (!view->scroll_info.autoscrolling) {
4998                 view->scroll_info.timeout_id = 0;
4999                 return FALSE;
5000         }
5001
5002         if (view->scroll_info.last_y > view->scroll_info.start_y &&
5003                 (view->scroll_info.last_y < view->scroll_info.start_y))
5004                 return TRUE;
5005
5006         /* Replace 100 with your speed of choice: The lower the faster.
5007          * Replace 3 with another speed of choice: The higher, the faster it accelerated
5008          *      based on the distance of the starting point from the mouse
5009          * (All also effected by the timeout interval of this callback) */
5010
5011         if (view->scroll_info.start_y > view->scroll_info.last_y)
5012                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
5013         else
5014                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
5015
5016         value = gtk_adjustment_get_value (view->vadjustment);
5017         value = CLAMP (value + speed, 0,
5018                        gtk_adjustment_get_upper (view->vadjustment) -
5019                        gtk_adjustment_get_page_size (view->vadjustment));
5020         gtk_adjustment_set_value (view->vadjustment, value);
5021
5022         return TRUE;
5023
5024 }
5025
5026 void
5027 ev_view_autoscroll_start (EvView *view)
5028 {
5029         gint x, y;
5030
5031         g_return_if_fail (EV_IS_VIEW (view));
5032
5033         if (view->scroll_info.autoscrolling)
5034                 return;
5035
5036         view->scroll_info.autoscrolling = TRUE;
5037         view->scroll_info.timeout_id =
5038                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5039                                view);
5040
5041         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5042         ev_view_handle_cursor_over_xy (view, x, y);
5043 }
5044
5045 void
5046 ev_view_autoscroll_stop (EvView *view)
5047 {
5048         gint x, y;
5049
5050         g_return_if_fail (EV_IS_VIEW (view));
5051
5052         if (!view->scroll_info.autoscrolling)
5053                 return;
5054
5055         view->scroll_info.autoscrolling = FALSE;
5056         if (view->scroll_info.timeout_id) {
5057                 g_source_remove (view->scroll_info.timeout_id);
5058                 view->scroll_info.timeout_id = 0;
5059         }
5060
5061         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5062         ev_view_handle_cursor_over_xy (view, x, y);
5063 }
5064
5065 static void
5066 ev_view_document_changed_cb (EvDocumentModel *model,
5067                              GParamSpec      *pspec,
5068                              EvView          *view)
5069 {
5070         EvDocument *document = ev_document_model_get_document (model);
5071
5072         if (document != view->document) {
5073                 gint current_page;
5074
5075                 clear_caches (view);
5076
5077                 if (view->document) {
5078                         g_object_unref (view->document);
5079                 }
5080
5081                 view->document = document;
5082                 view->find_result = 0;
5083
5084                 if (view->document) {
5085                         view->loading = FALSE;
5086                         g_object_ref (view->document);
5087                         setup_caches (view);
5088                 }
5089
5090                 current_page = ev_document_model_get_page (model);
5091                 if (view->current_page != current_page) {
5092                         ev_view_change_page (view, current_page);
5093                 } else {
5094                         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
5095                         gtk_widget_queue_resize (GTK_WIDGET (view));
5096                 }
5097         }
5098 }
5099
5100 static void
5101 ev_view_rotation_changed_cb (EvDocumentModel *model,
5102                              GParamSpec      *pspec,
5103                              EvView          *view)
5104 {
5105         gint rotation = ev_document_model_get_rotation (model);
5106
5107         view->rotation = rotation;
5108
5109         if (view->pixbuf_cache) {
5110                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5111                 if (!ev_document_is_page_size_uniform (view->document))
5112                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5113                 gtk_widget_queue_resize (GTK_WIDGET (view));
5114         }
5115
5116         ev_view_remove_all (view);
5117
5118         if (rotation != 0)
5119                 clear_selection (view);
5120 }
5121
5122 static void
5123 ev_view_inverted_colors_changed_cb (EvDocumentModel *model,
5124                                     GParamSpec      *pspec,
5125                                     EvView          *view)
5126 {
5127         if (view->pixbuf_cache) {
5128                 gboolean inverted_colors;
5129
5130                 inverted_colors = ev_document_model_get_inverted_colors (model);
5131                 ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
5132                 gtk_widget_queue_draw (GTK_WIDGET (view));
5133         }
5134 }
5135
5136 static void
5137 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
5138                                 GParamSpec      *pspec,
5139                                 EvView          *view)
5140 {
5141         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
5142
5143         view->sizing_mode = mode;
5144         if (mode != EV_SIZING_FREE)
5145                 gtk_widget_queue_resize (GTK_WIDGET (view));
5146 }
5147
5148 #define EPSILON 0.0000001
5149 static void
5150 ev_view_scale_changed_cb (EvDocumentModel *model,
5151                           GParamSpec      *pspec,
5152                           EvView          *view)
5153 {
5154         gdouble scale = ev_document_model_get_scale (model);
5155
5156         if (ABS (view->scale - scale) < EPSILON)
5157                 return;
5158
5159         view->scale = scale;
5160
5161         view->pending_resize = TRUE;
5162         if (view->sizing_mode == EV_SIZING_FREE)
5163                 gtk_widget_queue_resize (GTK_WIDGET (view));
5164 }
5165
5166 static void
5167 ev_view_continuous_changed_cb (EvDocumentModel *model,
5168                                GParamSpec      *pspec,
5169                                EvView          *view)
5170 {
5171         gboolean continuous = ev_document_model_get_continuous (model);
5172
5173         view->continuous = continuous;
5174         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5175         gtk_widget_queue_resize (GTK_WIDGET (view));
5176 }
5177
5178 static void
5179 ev_view_dual_page_changed_cb (EvDocumentModel *model,
5180                               GParamSpec      *pspec,
5181                               EvView          *view)
5182 {
5183         gboolean dual_page = ev_document_model_get_dual_page (model);
5184
5185         view->dual_page = dual_page;
5186         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5187         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5188          * preload_cache_size to be 2 if dual_page is set.
5189          */
5190         gtk_widget_queue_resize (GTK_WIDGET (view));
5191 }
5192
5193 static void
5194 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
5195                                GParamSpec      *pspec,
5196                                EvView          *view)
5197 {
5198         gboolean fullscreen = ev_document_model_get_fullscreen (model);
5199
5200         view->fullscreen = fullscreen;
5201         gtk_widget_queue_resize (GTK_WIDGET (view));
5202 }
5203
5204 void
5205 ev_view_set_model (EvView          *view,
5206                    EvDocumentModel *model)
5207 {
5208         g_return_if_fail (EV_IS_VIEW (view));
5209         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
5210
5211         if (model == view->model)
5212                 return;
5213
5214         if (view->model) {
5215                 g_signal_handlers_disconnect_by_func (view->model,
5216                                                       ev_view_document_changed_cb,
5217                                                       view);
5218                 g_signal_handlers_disconnect_by_func (view->model,
5219                                                       ev_view_page_changed_cb,
5220                                                       view);
5221                 g_object_unref (view->model);
5222         }
5223         view->model = g_object_ref (model);
5224
5225         /* Initialize view from model */
5226         view->rotation = ev_document_model_get_rotation (view->model);
5227         view->sizing_mode = ev_document_model_get_sizing_mode (view->model);
5228         view->scale = ev_document_model_get_scale (view->model);
5229         view->continuous = ev_document_model_get_continuous (view->model);
5230         view->dual_page = ev_document_model_get_dual_page (view->model);
5231         view->fullscreen = ev_document_model_get_fullscreen (view->model);
5232         ev_view_document_changed_cb (view->model, NULL, view);
5233
5234         g_signal_connect (view->model, "notify::document",
5235                           G_CALLBACK (ev_view_document_changed_cb),
5236                           view);
5237         g_signal_connect (view->model, "notify::rotation",
5238                           G_CALLBACK (ev_view_rotation_changed_cb),
5239                           view);
5240         g_signal_connect (view->model, "notify::inverted-colors",
5241                           G_CALLBACK (ev_view_inverted_colors_changed_cb),
5242                           view);
5243         g_signal_connect (view->model, "notify::sizing-mode",
5244                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
5245                           view);
5246         g_signal_connect (view->model, "notify::scale",
5247                           G_CALLBACK (ev_view_scale_changed_cb),
5248                           view);
5249         g_signal_connect (view->model, "notify::continuous",
5250                           G_CALLBACK (ev_view_continuous_changed_cb),
5251                           view);
5252         g_signal_connect (view->model, "notify::dual-page",
5253                           G_CALLBACK (ev_view_dual_page_changed_cb),
5254                           view);
5255         g_signal_connect (view->model, "notify::fullscreen",
5256                           G_CALLBACK (ev_view_fullscreen_changed_cb),
5257                           view);
5258         g_signal_connect (view->model, "page-changed",
5259                           G_CALLBACK (ev_view_page_changed_cb),
5260                           view);
5261 }
5262
5263 static void
5264 ev_view_reload_page (EvView         *view,
5265                      gint            page,
5266                      cairo_region_t *region)
5267 {
5268         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5269                                      region,
5270                                      page,
5271                                      view->rotation,
5272                                      view->scale);
5273 }
5274
5275 void
5276 ev_view_reload (EvView *view)
5277 {
5278         ev_pixbuf_cache_clear (view->pixbuf_cache);
5279         view_update_range_and_current_page (view);
5280 }
5281
5282 /*** Zoom and sizing mode ***/
5283
5284 gboolean
5285 ev_view_can_zoom_in (EvView *view)
5286 {
5287         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
5288 }
5289
5290 gboolean
5291 ev_view_can_zoom_out (EvView *view)
5292 {
5293         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
5294 }
5295
5296 void
5297 ev_view_zoom_in (EvView *view)
5298 {
5299         gdouble scale;
5300
5301         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5302
5303         view->pending_scroll = SCROLL_TO_CENTER;
5304         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
5305         ev_document_model_set_scale (view->model, scale);
5306 }
5307
5308 void
5309 ev_view_zoom_out (EvView *view)
5310 {
5311         gdouble scale;
5312
5313         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5314
5315         view->pending_scroll = SCROLL_TO_CENTER;
5316         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5317         ev_document_model_set_scale (view->model, scale);
5318 }
5319
5320 static double
5321 zoom_for_size_fit_width (gdouble doc_width,
5322                          gdouble doc_height,
5323                          int     target_width,
5324                          int     target_height)
5325 {
5326         return (double)target_width / doc_width;
5327 }
5328
5329 static double
5330 zoom_for_size_fit_height (gdouble doc_width,
5331                           gdouble doc_height,
5332                           int     target_width,
5333                           int     target_height)
5334 {
5335         return (double)target_height / doc_height;
5336 }
5337
5338 static double
5339 zoom_for_size_best_fit (gdouble doc_width,
5340                         gdouble doc_height,
5341                         int     target_width,
5342                         int     target_height)
5343 {
5344         double w_scale;
5345         double h_scale;
5346
5347         w_scale = (double)target_width / doc_width;
5348         h_scale = (double)target_height / doc_height;
5349
5350         return MIN (w_scale, h_scale);
5351 }
5352
5353 static void
5354 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5355                                                 int     width,
5356                                                 int     height)
5357 {
5358         gdouble doc_width, doc_height;
5359         GtkBorder border;
5360         gdouble scale;
5361         gint sb_size;
5362
5363         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5364         if (view->rotation == 90 || view->rotation == 270) {
5365                 gdouble tmp;
5366
5367                 tmp = doc_width;
5368                 doc_width = doc_height;
5369                 doc_height = tmp;
5370         }
5371
5372         compute_border (view, doc_width, doc_height, &border);
5373
5374         doc_width *= 2;
5375         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5376         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5377
5378         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5379
5380         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5381                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5382         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5383                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5384         else
5385                 g_assert_not_reached ();
5386
5387         ev_document_model_set_scale (view->model, scale);
5388 }
5389
5390 static void
5391 ev_view_zoom_for_size_continuous (EvView *view,
5392                                   int     width,
5393                                   int     height)
5394 {
5395         gdouble doc_width, doc_height;
5396         GtkBorder border;
5397         gdouble scale;
5398         gint sb_size;
5399
5400         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5401         if (view->rotation == 90 || view->rotation == 270) {
5402                 gdouble tmp;
5403
5404                 tmp = doc_width;
5405                 doc_width = doc_height;
5406                 doc_height = tmp;
5407         }
5408
5409         compute_border (view, doc_width, doc_height, &border);
5410
5411         width -= (border.left + border.right + 2 * view->spacing);
5412         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5413
5414         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5415
5416         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5417                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5418         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5419                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5420         else
5421                 g_assert_not_reached ();
5422
5423         ev_document_model_set_scale (view->model, scale);
5424 }
5425
5426 static void
5427 ev_view_zoom_for_size_dual_page (EvView *view,
5428                                  int     width,
5429                                  int     height)
5430 {
5431         GtkBorder border;
5432         gdouble doc_width, doc_height;
5433         gdouble scale;
5434         gint other_page;
5435
5436         other_page = view->current_page ^ 1;
5437
5438         /* Find the largest of the two. */
5439         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5440         if (other_page < ev_document_get_n_pages (view->document)) {
5441                 gdouble width_2, height_2;
5442
5443                 get_doc_page_size (view, other_page, &width_2, &height_2);
5444                 if (width_2 > doc_width)
5445                         doc_width = width_2;
5446                 if (height_2 > doc_height)
5447                         doc_height = height_2;
5448         }
5449         compute_border (view, width, height, &border);
5450
5451         doc_width = doc_width * 2;
5452         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5453         height -= (border.top + border.bottom + 2 * view->spacing);
5454
5455         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5456                 gint sb_size;
5457
5458                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5459                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5460         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5461                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5462         else
5463                 g_assert_not_reached ();
5464
5465         ev_document_model_set_scale (view->model, scale);
5466 }
5467
5468 static void
5469 ev_view_zoom_for_size_single_page (EvView *view,
5470                                    int     width,
5471                                    int     height)
5472 {
5473         gdouble doc_width, doc_height;
5474         GtkBorder border;
5475         gdouble scale;
5476
5477         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5478
5479         /* Get an approximate border */
5480         compute_border (view, width, height, &border);
5481
5482         width -= (border.left + border.right + 2 * view->spacing);
5483         height -= (border.top + border.bottom + 2 * view->spacing);
5484
5485         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5486                 gint sb_size;
5487
5488                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5489                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5490         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5491                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5492         else
5493                 g_assert_not_reached ();
5494
5495         ev_document_model_set_scale (view->model, scale);
5496 }
5497
5498 static void
5499 ev_view_zoom_for_size (EvView *view,
5500                        int     width,
5501                        int     height)
5502 {
5503         g_return_if_fail (EV_IS_VIEW (view));
5504         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5505                           view->sizing_mode == EV_SIZING_BEST_FIT);
5506         g_return_if_fail (width >= 0);
5507         g_return_if_fail (height >= 0);
5508
5509         if (view->document == NULL)
5510                 return;
5511
5512         if (view->continuous && view->dual_page)
5513                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5514         else if (view->continuous)
5515                 ev_view_zoom_for_size_continuous (view, width, height);
5516         else if (view->dual_page)
5517                 ev_view_zoom_for_size_dual_page (view, width, height);
5518         else
5519                 ev_view_zoom_for_size_single_page (view, width, height);
5520 }
5521
5522 /*** Find ***/
5523 static gint
5524 ev_view_find_get_n_results (EvView *view, gint page)
5525 {
5526         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5527 }
5528
5529 static EvRectangle *
5530 ev_view_find_get_result (EvView *view, gint page, gint result)
5531 {
5532         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5533 }
5534
5535 static void
5536 jump_to_find_result (EvView *view)
5537 {
5538         gint n_results;
5539         gint page = view->current_page;
5540
5541         n_results = ev_view_find_get_n_results (view, page);
5542
5543         if (n_results > 0 && view->find_result < n_results) {
5544                 EvRectangle *rect;
5545                 GdkRectangle view_rect;
5546
5547                 rect = ev_view_find_get_result (view, page, view->find_result);
5548                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5549                 ensure_rectangle_is_visible (view, &view_rect);
5550                 view->jump_to_find_result = FALSE;
5551         }
5552 }
5553
5554 /**
5555  * jump_to_find_page
5556  * @view: #EvView instance
5557  * @direction: Direction to look
5558  * @shift: Shift from current page
5559  *
5560  * Jumps to the first page that has occurences of searched word.
5561  * Uses a direction where to look and a shift from current page.
5562  *
5563  */
5564 static void
5565 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5566 {
5567         int n_pages, i;
5568
5569         n_pages = ev_document_get_n_pages (view->document);
5570
5571         for (i = 0; i < n_pages; i++) {
5572                 int page;
5573
5574                 if (direction == EV_VIEW_FIND_NEXT)
5575                         page = view->current_page + i;
5576                 else
5577                         page = view->current_page - i;
5578                 page += shift;
5579
5580                 if (page >= n_pages) {
5581                         page = page - n_pages;
5582                 } else if (page < 0)
5583                         page = page + n_pages;
5584
5585                 if (ev_view_find_get_n_results (view, page) > 0) {
5586                         ev_document_model_set_page (view->model, page);
5587                         break;
5588                 }
5589         }
5590 }
5591
5592 void
5593 ev_view_find_changed (EvView *view, GList **results, gint page)
5594 {
5595         view->find_pages = results;
5596
5597         if (view->jump_to_find_result == TRUE) {
5598                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5599                 jump_to_find_result (view);
5600         }
5601
5602         if (view->current_page == page)
5603                 gtk_widget_queue_draw (GTK_WIDGET (view));
5604 }
5605
5606 void
5607 ev_view_find_next (EvView *view)
5608 {
5609         gint n_results;
5610
5611         n_results = ev_view_find_get_n_results (view, view->current_page);
5612         view->find_result++;
5613
5614         if (view->find_result >= n_results) {
5615                 view->find_result = 0;
5616                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5617                 jump_to_find_result (view);
5618         } else {
5619                 jump_to_find_result (view);
5620                 gtk_widget_queue_draw (GTK_WIDGET (view));
5621         }
5622 }
5623
5624 void
5625 ev_view_find_previous (EvView *view)
5626 {
5627         view->find_result--;
5628
5629         if (view->find_result < 0) {
5630                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5631                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5632                 jump_to_find_result (view);
5633         } else {
5634                 jump_to_find_result (view);
5635                 gtk_widget_queue_draw (GTK_WIDGET (view));
5636         }
5637 }
5638
5639 void
5640 ev_view_find_search_changed (EvView *view)
5641 {
5642         /* search string has changed, focus on new search result */
5643         view->jump_to_find_result = TRUE;
5644         view->find_pages = NULL;
5645 }
5646
5647 void
5648 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5649 {
5650         view->highlight_find_results = value;
5651         gtk_widget_queue_draw (GTK_WIDGET (view));
5652 }
5653
5654 void
5655 ev_view_find_cancel (EvView *view)
5656 {
5657         view->find_pages = NULL;
5658 }
5659
5660 /*** Synctex ***/
5661 void
5662 ev_view_highlight_forward_search (EvView       *view,
5663                                   EvSourceLink *link)
5664 {
5665         EvMapping   *mapping;
5666         gint         page;
5667         GdkRectangle view_rect;
5668
5669         if (!ev_document_has_synctex (view->document))
5670                 return;
5671
5672         mapping = ev_document_synctex_forward_search (view->document, link);
5673         if (!mapping)
5674                 return;
5675
5676         if (view->synctex_result)
5677                 g_free (view->synctex_result);
5678         view->synctex_result = mapping;
5679
5680         page = GPOINTER_TO_INT (mapping->data);
5681         ev_document_model_set_page (view->model, page);
5682
5683         doc_rect_to_view_rect (view, page, &mapping->area, &view_rect);
5684         ensure_rectangle_is_visible (view, &view_rect);
5685         gtk_widget_queue_draw (GTK_WIDGET (view));
5686 }
5687
5688 /*** Selections ***/
5689
5690 /* compute_new_selection_rect/text calculates the area currently selected by
5691  * view_rect.  each handles a different mode;
5692  */
5693 static GList *
5694 compute_new_selection_rect (EvView       *view,
5695                             GdkPoint     *start,
5696                             GdkPoint     *stop)
5697 {
5698         GdkRectangle view_rect;
5699         int n_pages, i;
5700         GList *list = NULL;
5701
5702         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5703
5704         view_rect.x = MIN (start->x, stop->x);
5705         view_rect.y = MIN (start->y, stop->y);
5706         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5707         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5708
5709         n_pages = ev_document_get_n_pages (view->document);
5710
5711         for (i = 0; i < n_pages; i++) {
5712                 GdkRectangle page_area;
5713                 GtkBorder border;
5714
5715                 if (ev_view_get_page_extents (view, i, &page_area, &border)) {
5716                         GdkRectangle overlap;
5717
5718                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5719                                 EvViewSelection *selection;
5720
5721                                 selection = g_new0 (EvViewSelection, 1);
5722                                 selection->page = i;
5723                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5724                                                        &(selection->rect));
5725
5726                                 list = g_list_append (list, selection);
5727                         }
5728                 }
5729         }
5730
5731         return list;
5732 }
5733
5734 static gboolean
5735 gdk_rectangle_point_in (GdkRectangle *rectangle,
5736                         GdkPoint     *point)
5737 {
5738         return rectangle->x <= point->x &&
5739                 rectangle->y <= point->y &&
5740                 point->x < rectangle->x + rectangle->width &&
5741                 point->y < rectangle->y + rectangle->height;
5742 }
5743
5744 static GList *
5745 compute_new_selection_text (EvView          *view,
5746                             EvSelectionStyle style,
5747                             GdkPoint        *start,
5748                             GdkPoint        *stop)
5749 {
5750         int n_pages, i, first, last;
5751         GList *list = NULL;
5752         EvViewSelection *selection;
5753         gdouble width, height;
5754         int start_page, end_page;
5755
5756         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5757
5758         n_pages = ev_document_get_n_pages (view->document);
5759
5760         /* First figure out the range of pages the selection
5761          * affects. */
5762         first = n_pages;
5763         last = 0;
5764         if (view->continuous) {
5765                 start_page = 0;
5766                 end_page = n_pages;
5767         } else if (view->dual_page) {
5768                 start_page = view->start_page;
5769                 end_page = view->end_page + 1;
5770         } else {
5771                 start_page = view->current_page;
5772                 end_page = view->current_page + 1;
5773         }
5774
5775         for (i = start_page; i < end_page; i++) {
5776                 GdkRectangle page_area;
5777                 GtkBorder border;
5778
5779                 ev_view_get_page_extents (view, i, &page_area, &border);
5780                 if (gdk_rectangle_point_in (&page_area, start) ||
5781                     gdk_rectangle_point_in (&page_area, stop)) {
5782                         if (first == n_pages)
5783                                 first = i;
5784                         last = i;
5785                 }
5786
5787         }
5788
5789         /* Now create a list of EvViewSelection's for the affected
5790          * pages.  This could be an empty list, a list of just one
5791          * page or a number of pages.*/
5792         for (i = first; i < last + 1; i++) {
5793                 GdkRectangle page_area;
5794                 GtkBorder border;
5795                 GdkPoint *point;
5796
5797                 get_doc_page_size (view, i, &width, &height);
5798
5799                 selection = g_new0 (EvViewSelection, 1);
5800                 selection->page = i;
5801                 selection->style = style;
5802                 selection->rect.x1 = selection->rect.y1 = 0;
5803                 selection->rect.x2 = width;
5804                 selection->rect.y2 = height;
5805
5806                 ev_view_get_page_extents (view, i, &page_area, &border);
5807
5808                 if (gdk_rectangle_point_in (&page_area, start))
5809                         point = start;
5810                 else
5811                         point = stop;
5812
5813                 if (i == first)
5814                         view_point_to_doc_point (view, point, &page_area,
5815                                                  &selection->rect.x1,
5816                                                  &selection->rect.y1);
5817
5818                 /* If the selection is contained within just one page,
5819                  * make sure we don't write 'start' into both points
5820                  * in selection->rect. */
5821                 if (first == last)
5822                         point = stop;
5823
5824                 if (i == last)
5825                         view_point_to_doc_point (view, point, &page_area,
5826                                                  &selection->rect.x2,
5827                                                  &selection->rect.y2);
5828
5829                 list = g_list_append (list, selection);
5830         }
5831
5832         return list;
5833 }
5834
5835 /* This function takes the newly calculated list, and figures out which regions
5836  * have changed.  It then queues a redraw approporiately.
5837  */
5838 static void
5839 merge_selection_region (EvView *view,
5840                         GList  *new_list)
5841 {
5842         GList *old_list;
5843         GList *new_list_ptr, *old_list_ptr;
5844
5845         /* Update the selection */
5846         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5847         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5848         g_list_free (view->selection_info.selections);
5849         view->selection_info.selections = new_list;
5850         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5851         g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
5852
5853         new_list_ptr = new_list;
5854         old_list_ptr = old_list;
5855
5856         while (new_list_ptr || old_list_ptr) {
5857                 EvViewSelection *old_sel, *new_sel;
5858                 int cur_page;
5859                 cairo_region_t *region = NULL;
5860
5861                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5862                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5863
5864                 /* Assume that the lists are in order, and we run through them
5865                  * comparing them, one page at a time.  We come out with the
5866                  * first page we see. */
5867                 if (new_sel && old_sel) {
5868                         if (new_sel->page < old_sel->page) {
5869                                 new_list_ptr = new_list_ptr->next;
5870                                 old_sel = NULL;
5871                         } else if (new_sel->page > old_sel->page) {
5872                                 old_list_ptr = old_list_ptr->next;
5873                                 new_sel = NULL;
5874                         } else {
5875                                 new_list_ptr = new_list_ptr->next;
5876                                 old_list_ptr = old_list_ptr->next;
5877                         }
5878                 } else if (new_sel) {
5879                         new_list_ptr = new_list_ptr->next;
5880                 } else if (old_sel) {
5881                         old_list_ptr = old_list_ptr->next;
5882                 }
5883
5884                 g_assert (new_sel || old_sel);
5885
5886                 /* is the page we're looking at on the screen?*/
5887                 cur_page = new_sel ? new_sel->page : old_sel->page;
5888                 if (cur_page < view->start_page || cur_page > view->end_page)
5889                         continue;
5890
5891                 /* seed the cache with a new page.  We are going to need the new
5892                  * region too. */
5893                 if (new_sel) {
5894                         cairo_region_t *tmp_region = NULL;
5895
5896                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5897                                                                cur_page,
5898                                                                view->scale,
5899                                                                &tmp_region);
5900
5901                         if (tmp_region && !cairo_region_is_empty (tmp_region)) {
5902                                 new_sel->covered_region = cairo_region_reference (tmp_region);
5903                         }
5904                 }
5905
5906                 /* Now we figure out what needs redrawing */
5907                 if (old_sel && new_sel) {
5908                         if (old_sel->covered_region && new_sel->covered_region) {
5909                                 /* We only want to redraw the areas that have
5910                                  * changed, so we xor the old and new regions
5911                                  * and redraw if it's different */
5912                                 region = cairo_region_copy (old_sel->covered_region);
5913 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 9, 12)
5914                                 cairo_region_xor (region, new_sel->covered_region);
5915 #else
5916                                 cairo_region_t *tbr;
5917                                 tbr = cairo_region_copy (new_sel->covered_region);
5918
5919                                 /* xor old_sel, new_sel*/
5920                                 cairo_region_subtract (tbr, region);
5921                                 cairo_region_subtract (region, new_sel->covered_region);
5922                                 cairo_region_union (region, tbr);
5923                                 cairo_region_destroy (tbr);
5924 #endif
5925
5926                                 if (cairo_region_is_empty (region)) {
5927                                         cairo_region_destroy (region);
5928                                         region = NULL;
5929                                 } else {
5930                                         gint num_rectangles = cairo_region_num_rectangles (region);
5931                                         GdkRectangle r;
5932
5933                                         /* We need to make the damage region a little bigger
5934                                          * because the edges of the old selection might change
5935                                          */
5936                                         cairo_region_get_rectangle (region, 0, &r);
5937                                         r.x -= 5;
5938                                         r.width = 5;
5939                                         cairo_region_union_rectangle (region, &r);
5940
5941                                         cairo_region_get_rectangle (region, num_rectangles - 1, &r);
5942                                         r.x += r.width;
5943                                         r.width = 5;
5944                                         cairo_region_union_rectangle (region, &r);
5945                                 }
5946                         } else if (old_sel->covered_region) {
5947                                 region = cairo_region_copy (old_sel->covered_region);
5948                         } else if (new_sel->covered_region) {
5949                                 region = cairo_region_copy (new_sel->covered_region);
5950                         }
5951                 } else if (old_sel && !new_sel) {
5952                         if (old_sel->covered_region && !cairo_region_is_empty (old_sel->covered_region)) {
5953                                 region = cairo_region_copy (old_sel->covered_region);
5954                         }
5955                 } else if (!old_sel && new_sel) {
5956                         if (new_sel->covered_region && !cairo_region_is_empty (new_sel->covered_region)) {
5957                                 region = cairo_region_copy (new_sel->covered_region);
5958                         }
5959                 } else {
5960                         g_assert_not_reached ();
5961                 }
5962
5963                 /* Redraw the damaged region! */
5964                 if (region) {
5965                         GdkWindow   *bin_window;
5966                         GdkRectangle page_area;
5967                         GtkBorder    border;
5968
5969                         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
5970                         ev_view_get_page_extents (view, cur_page, &page_area, &border);
5971                         cairo_region_translate (region,
5972                                            page_area.x + border.left - view->scroll_x,
5973                                            page_area.y + border.top - view->scroll_y);
5974 #if GTK_CHECK_VERSION(2, 90, 5)
5975                         gdk_window_invalidate_region (bin_window, region, TRUE);
5976 #else
5977                 {
5978                         GdkRegion *gdk_region = gdk_region_new ();
5979                         guint      n_recs = cairo_region_num_rectangles (region);
5980                         guint      i;
5981
5982                         for (i = 0; i < n_recs; i++) {
5983                                 cairo_rectangle_int_t rect;
5984
5985                                 cairo_region_get_rectangle (region, i, &rect);
5986                                 gdk_region_union_with_rect (gdk_region, (GdkRectangle *)&rect);
5987                         }
5988                         gdk_window_invalidate_region (bin_window, gdk_region, TRUE);
5989                         gdk_region_destroy (gdk_region);
5990                 }
5991 #endif
5992                         cairo_region_destroy (region);
5993                 }
5994         }
5995
5996         /* Free the old list, now that we're done with it. */
5997         g_list_foreach (old_list, (GFunc) selection_free, NULL);
5998         g_list_free (old_list);
5999 }
6000
6001 static void
6002 compute_selections (EvView          *view,
6003                     EvSelectionStyle style,
6004                     GdkPoint        *start,
6005                     GdkPoint        *stop)
6006 {
6007         GList *list;
6008
6009         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
6010                 list = compute_new_selection_rect (view, start, stop);
6011         else
6012                 list = compute_new_selection_text (view, style, start, stop);
6013         merge_selection_region (view, list);
6014 }
6015
6016 /* Free's the selection.  It's up to the caller to queue redraws if needed.
6017  */
6018 static void
6019 selection_free (EvViewSelection *selection)
6020 {
6021         if (selection->covered_region)
6022                 cairo_region_destroy (selection->covered_region);
6023         g_free (selection);
6024 }
6025
6026 static void
6027 clear_selection (EvView *view)
6028 {
6029         if (view->selection_info.selections) {
6030                 g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6031                 g_list_free (view->selection_info.selections);
6032                 view->selection_info.selections = NULL;
6033
6034                 g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
6035         }
6036         view->selection_info.in_selection = FALSE;
6037         if (view->pixbuf_cache)
6038                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6039 }
6040
6041 void
6042 ev_view_select_all (EvView *view)
6043 {
6044         GList *selections = NULL;
6045         int n_pages, i;
6046
6047         /* Disable selection on rotated pages for the 0.4.0 series */
6048         if (view->rotation != 0)
6049                 return;
6050
6051         clear_selection (view);
6052
6053         n_pages = ev_document_get_n_pages (view->document);
6054         for (i = 0; i < n_pages; i++) {
6055                 gdouble width, height;
6056                 EvViewSelection *selection;
6057
6058                 get_doc_page_size (view, i, &width, &height);
6059
6060                 selection = g_new0 (EvViewSelection, 1);
6061                 selection->page = i;
6062                 selection->style = EV_SELECTION_STYLE_GLYPH;
6063                 selection->rect.x1 = selection->rect.y1 = 0;
6064                 selection->rect.x2 = width;
6065                 selection->rect.y2 = height;
6066
6067                 selections = g_list_append (selections, selection);
6068         }
6069
6070         merge_selection_region (view, selections);
6071         gtk_widget_queue_draw (GTK_WIDGET (view));
6072 }
6073
6074 gboolean
6075 ev_view_get_has_selection (EvView *view)
6076 {
6077         return view->selection_info.selections != NULL;
6078 }
6079
6080 static char *
6081 get_selected_text (EvView *view)
6082 {
6083         GString *text;
6084         GList *l;
6085         gchar *normalized_text;
6086
6087         text = g_string_new (NULL);
6088
6089         ev_document_doc_mutex_lock ();
6090
6091         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6092                 EvViewSelection *selection = (EvViewSelection *)l->data;
6093                 EvPage *page;
6094                 gchar *tmp;
6095
6096                 page = ev_document_get_page (view->document, selection->page);
6097                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6098                                                       page, selection->style,
6099                                                       &(selection->rect));
6100                 g_object_unref (page);
6101                 g_string_append (text, tmp);
6102                 g_free (tmp);
6103         }
6104
6105         ev_document_doc_mutex_unlock ();
6106
6107         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6108         g_string_free (text, TRUE);
6109         return normalized_text;
6110 }
6111
6112 static void
6113 ev_view_clipboard_copy (EvView      *view,
6114                         const gchar *text)
6115 {
6116         GtkClipboard *clipboard;
6117
6118         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6119                                               GDK_SELECTION_CLIPBOARD);
6120         gtk_clipboard_set_text (clipboard, text, -1);
6121 }
6122
6123 void
6124 ev_view_copy (EvView *ev_view)
6125 {
6126         char *text;
6127
6128         if (!EV_IS_SELECTION (ev_view->document))
6129                 return;
6130
6131         text = get_selected_text (ev_view);
6132         ev_view_clipboard_copy (ev_view, text);
6133         g_free (text);
6134 }
6135
6136 static void
6137 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6138                         GtkSelectionData *selection_data,
6139                         guint             info,
6140                         gpointer          data)
6141 {
6142         EvView *ev_view = EV_VIEW (data);
6143
6144         if (ev_view->link_selected) {
6145                 gtk_selection_data_set_text (selection_data,
6146                                              ev_link_action_get_uri (ev_view->link_selected),
6147                                              -1);
6148         } else if (EV_IS_SELECTION (ev_view->document) &&
6149                    ev_view->selection_info.selections) {
6150                 gchar *text;
6151
6152                 text = get_selected_text (ev_view);
6153                 if (text) {
6154                         gtk_selection_data_set_text (selection_data, text, -1);
6155                         g_free (text);
6156                 }
6157         }
6158 }
6159
6160 static void
6161 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6162                           gpointer      data)
6163 {
6164         EvView *view = EV_VIEW (data);
6165
6166         clear_selection (view);
6167         clear_link_selected (view);
6168 }
6169
6170 static void
6171 ev_view_update_primary_selection (EvView *ev_view)
6172 {
6173         GtkClipboard *clipboard;
6174
6175         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6176                                               GDK_SELECTION_PRIMARY);
6177
6178         if (ev_view->selection_info.selections || ev_view->link_selected) {
6179                 GtkTargetList *target_list;
6180                 GtkTargetEntry *targets;
6181                 int n_targets;
6182
6183                 target_list = gtk_target_list_new (NULL, 0);
6184                 gtk_target_list_add_text_targets (target_list, 0);
6185                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6186                 gtk_target_list_unref (target_list);
6187
6188                 if (!gtk_clipboard_set_with_owner (clipboard,
6189                                                    targets, n_targets,
6190                                                    ev_view_primary_get_cb,
6191                                                    ev_view_primary_clear_cb,
6192                                                    G_OBJECT (ev_view)))
6193                         ev_view_primary_clear_cb (clipboard, ev_view);
6194
6195                 gtk_target_table_free (targets, n_targets);
6196         } else {
6197                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6198                         gtk_clipboard_clear (clipboard);
6199         }
6200 }
6201
6202 static void
6203 clear_link_selected (EvView *view)
6204 {
6205         if (view->link_selected) {
6206                 g_object_unref (view->link_selected);
6207                 view->link_selected = NULL;
6208         }
6209 }
6210
6211 void
6212 ev_view_copy_link_address (EvView       *view,
6213                            EvLinkAction *action)
6214 {
6215         clear_link_selected (view);
6216
6217         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6218
6219         view->link_selected = g_object_ref (action);
6220         ev_view_update_primary_selection (view);
6221 }
6222
6223 /*** Cursor operations ***/
6224 static void
6225 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6226 {
6227         GdkCursor *cursor = NULL;
6228         GtkWidget *widget;
6229         GdkWindow *bin_window;
6230
6231         if (view->cursor == new_cursor) {
6232                 return;
6233         }
6234
6235         view->cursor = new_cursor;
6236
6237         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
6238         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6239         cursor = ev_view_cursor_new (gtk_widget_get_display (widget), new_cursor);
6240         gdk_window_set_cursor (bin_window, cursor);
6241         gdk_flush ();
6242         if (cursor)
6243                 gdk_cursor_unref (cursor);
6244 }
6245
6246 void
6247 ev_view_hide_cursor (EvView *view)
6248 {
6249        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6250 }
6251
6252 void
6253 ev_view_show_cursor (EvView *view)
6254 {
6255        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6256 }
6257
6258 gboolean
6259 ev_view_next_page (EvView *view)
6260 {
6261         int page, n_pages;
6262
6263         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6264
6265         if (!view->document)
6266                 return FALSE;
6267
6268         page = ev_document_model_get_page (view->model);
6269         n_pages = ev_document_get_n_pages (view->document);
6270
6271         if (view->dual_page)
6272                 page = page + 2;
6273         else
6274                 page = page + 1;
6275
6276         if (page < n_pages) {
6277                 ev_document_model_set_page (view->model, page);
6278                 return TRUE;
6279         } else if (view->dual_page && page == n_pages) {
6280                 ev_document_model_set_page (view->model, page - 1);
6281                 return TRUE;
6282         } else {
6283                 return FALSE;
6284         }
6285 }
6286
6287 gboolean
6288 ev_view_previous_page (EvView *view)
6289 {
6290         int page;
6291
6292         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6293
6294         if (!view->document)
6295                 return FALSE;
6296
6297         page = ev_document_model_get_page (view->model);
6298
6299         if (view->dual_page)
6300                 page = page - 2;
6301         else
6302                 page = page - 1;
6303
6304         if (page >= 0) {
6305                 ev_document_model_set_page (view->model, page);
6306                 return TRUE;
6307         } else if (view->dual_page && page == -1) {
6308                 ev_document_model_set_page (view->model, 0);
6309                 return TRUE;
6310         } else {
6311                 return FALSE;
6312         }
6313 }
6314