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       view_update_range_and_current_page         (EvView             *view);
  84 static void       set_scroll_adjustment                      (EvView             *view,
  85                                                               GtkOrientation      orientation,
  86                                                               GtkAdjustment      *adjustment);
  87 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
  88                                                               guint               keyval,
  89                                                               GdkModifierType modifiers,
  90                                                               GtkScrollType       scroll,
  91                                                               gboolean            horizontal);
  92 static void       ensure_rectangle_is_visible                (EvView             *view,
  93                                                               GdkRectangle       *rect);
  94
  95 /*** Geometry computations ***/
  96 static void       compute_border                             (EvView             *view,
  97                                                               int                 width,
  98                                                               int                 height,
  99                                                               GtkBorder          *border);
 100 static void       get_page_y_offset                          (EvView             *view,
 101                                                               int                 page,
 102                                                               int                *y_offset);
 103 static void       view_rect_to_doc_rect                      (EvView             *view,
 104                                                               GdkRectangle       *view_rect,
 105                                                               GdkRectangle       *page_area,
 106                                                               EvRectangle        *doc_rect);
 107 static void       doc_rect_to_view_rect                      (EvView             *view,
 108                                                               int                 page,
 109                                                               EvRectangle        *doc_rect,
 110                                                               GdkRectangle       *view_rect);
 111 static gboolean   get_dual_even_left                         (EvView             *view);
 112 static void       find_page_at_location                      (EvView             *view,
 113                                                               gdouble             x,
 114                                                               gdouble             y,
 115                                                               gint               *page,
 116                                                               gint               *x_offset,
 117                                                               gint               *y_offset);
 118 static void       doc_point_to_view_point                    (EvView             *view,
 119                                                               int                 page,
 120                                                               EvPoint            *doc_point,
 121                                                               GdkPoint           *view_point);
 122 /*** Hyperrefs ***/
 123 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 124                                                               gdouble             x,
 125                                                               gdouble             y);
 126 static char*      tip_from_link                              (EvView             *view,
 127                                                               EvLink             *link);
 128 /*** Forms ***/
 129 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 130                                                                gdouble            x,
 131                                                                gdouble            y);
 132
 133 /*** Annotations ***/
 134 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 135                                                               gdouble             x,
 136                                                               gdouble             y);
 137 static void          show_annotation_windows                 (EvView             *view,
 138                                                               gint                page);
 139 static void          hide_annotation_windows                 (EvView             *view,
 140                                                               gint                page);
 141 /*** GtkWidget implementation ***/
 142 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 143                                                               GtkRequisition     *requisition);
 144 static void       ev_view_size_request_continuous            (EvView             *view,
 145                                                               GtkRequisition     *requisition);
 146 static void       ev_view_size_request_dual_page             (EvView             *view,
 147                                                               GtkRequisition     *requisition);
 148 static void       ev_view_size_request_single_page           (EvView             *view,
 149                                                               GtkRequisition     *requisition);
 150 static void       ev_view_size_request                       (GtkWidget          *widget,
 151                                                               GtkRequisition     *requisition);
 152 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 153                                                               GtkAllocation      *allocation);
 154 static void       ev_view_realize                            (GtkWidget          *widget);
 155 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 156                                                               GdkEventScroll     *event);
 157 static gboolean   ev_view_draw                               (GtkWidget          *widget,
 158                                                               cairo_t            *cr);
 159 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 160 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 161                                                               GdkEventButton     *event);
 162 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 163                                                               GdkEventMotion     *event);
 164 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 165                                                               GdkEventButton     *event);
 166 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 167                                                               GdkEventCrossing   *event);
 168 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 169                                                               GdkEventCrossing   *event);
 170 static void       ev_view_style_set                          (GtkWidget          *widget,
 171                                                               GtkStyle           *old_style);
 172 static void       ev_view_remove_all                         (EvView             *view);
 173
 174 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 175
 176 /*** Drawing ***/
 177 static void       highlight_find_results                     (EvView             *view,
 178                                                               cairo_t            *cr,
 179                                                               int                 page);
 180 static void       highlight_forward_search_results           (EvView             *view,
 181                                                               cairo_t            *cr,
 182                                                               int                 page);
 183 static void       focus_annotation                           (EvView             *view,
 184                                                               cairo_t            *cr,
 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_dispose                            (GObject            *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 on_hadjustment_notify (EvView *view,
 776                        GParamSpec *pspec,
 777                        gpointer user_data)
 778 {
 779         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, gtk_scrollable_get_hadjustment (GTK_SCROLLABLE (view)));
 780         on_adjustment_value_changed (NULL, view);
 781 }
 782
 783
 784 static void
 785 on_vadjustment_notify (EvView *view,
 786                        GParamSpec *pspec,
 787                        gpointer user_data)
 788 {
 789         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, gtk_scrollable_get_vadjustment (GTK_SCROLLABLE (view)));
 790         on_adjustment_value_changed (NULL, view);
 791 }
 792
 793 static void
 794 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 795                            guint           keyval,
 796                            GdkModifierType modifiers,
 797                            GtkScrollType   scroll,
 798                            gboolean        horizontal)
 799 {
 800   guint keypad_keyval = keyval - GDK_KEY_Left + GDK_KEY_KP_Left;
 801
 802   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 803                                 "binding_activated", 2,
 804                                 GTK_TYPE_SCROLL_TYPE, scroll,
 805                                 G_TYPE_BOOLEAN, horizontal);
 806   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 807                                 "binding_activated", 2,
 808                                 GTK_TYPE_SCROLL_TYPE, scroll,
 809                                 G_TYPE_BOOLEAN, horizontal);
 810 }
 811
 812 static gdouble
 813 compute_scroll_increment (EvView        *view,
 814                           GtkScrollType  scroll)
 815 {
 816         GtkWidget *widget = GTK_WIDGET (view);
 817         GtkAdjustment *adjustment = view->vadjustment;
 818         cairo_region_t *text_region, *region;
 819         GtkAllocation allocation;
 820         gint page;
 821         GdkRectangle rect;
 822         EvRectangle doc_rect;
 823         GdkRectangle page_area;
 824         GtkBorder border;
 825         gdouble fraction = 1.0;
 826
 827         if (scroll != GTK_SCROLL_PAGE_BACKWARD && scroll != GTK_SCROLL_PAGE_FORWARD)
 828                 return gtk_adjustment_get_page_size (adjustment);
 829
 830         page = scroll == GTK_SCROLL_PAGE_BACKWARD ? view->start_page : view->end_page;
 831
 832         text_region = ev_page_cache_get_text_mapping (view->page_cache, page);
 833         if (!text_region || cairo_region_is_empty (text_region))
 834                 return gtk_adjustment_get_page_size (adjustment);
 835
 836         gtk_widget_get_allocation (widget, &allocation);
 837         ev_view_get_page_extents (view, page, &page_area, &border);
 838         rect.x = page_area.x + view->scroll_x;
 839         rect.y = view->scroll_y + (scroll == GTK_SCROLL_PAGE_BACKWARD ? 5 : allocation.height - 5);
 840         rect.width = page_area.width;
 841         rect.height = 1;
 842         view_rect_to_doc_rect (view, &rect, &page_area, &doc_rect);
 843
 844         /* Convert the doc rectangle into a GdkRectangle */
 845         rect.x = doc_rect.x1;
 846         rect.y = doc_rect.y1;
 847         rect.width = doc_rect.x2 - doc_rect.x1;
 848         rect.height = MAX (1, doc_rect.y2 - doc_rect.y1);
 849         region = cairo_region_create_rectangle (&rect);
 850
 851         cairo_region_intersect (region, text_region);
 852         if (cairo_region_num_rectangles (region)) {
 853                 EvRenderContext *rc;
 854                 EvPage  *ev_page;
 855                 cairo_region_t *sel_region;
 856
 857                 cairo_region_get_rectangle (region, 0, &rect);
 858                 ev_page = ev_document_get_page (view->document, page);
 859                 rc = ev_render_context_new (ev_page, view->rotation, view->scale);
 860                 g_object_unref (ev_page);
 861                 /* Get the selection region to know the height of the line */
 862                 doc_rect.x1 = doc_rect.x2 = rect.x + 0.5;
 863                 doc_rect.y1 = doc_rect.y2 = rect.y + 0.5;
 864
 865                 ev_document_doc_mutex_lock ();
 866                 sel_region = ev_selection_get_selection_region (EV_SELECTION (view->document),
 867                                                                 rc, EV_SELECTION_STYLE_LINE,
 868                                                                 &doc_rect);
 869                 ev_document_doc_mutex_unlock ();
 870
 871                 g_object_unref (rc);
 872
 873                 if (cairo_region_num_rectangles (sel_region) > 0) {
 874                         cairo_region_get_rectangle (sel_region, 0, &rect);
 875                         fraction = 1 - (rect.height / gtk_adjustment_get_page_size (adjustment));
 876                 }
 877                 cairo_region_destroy (sel_region);
 878         }
 879         cairo_region_destroy (region);
 880
 881         return gtk_adjustment_get_page_size (adjustment) * fraction;
 882
 883 }
 884
 885 void
 886 ev_view_scroll (EvView        *view,
 887                 GtkScrollType  scroll,
 888                 gboolean       horizontal)
 889 {
 890         GtkAdjustment *adjustment;
 891         double value, increment;
 892         gdouble upper, lower;
 893         gdouble page_size;
 894         gdouble step_increment;
 895         gboolean first_page = FALSE;
 896         gboolean last_page = FALSE;
 897
 898         view->jump_to_find_result = FALSE;
 899
 900         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
 901                 switch (scroll) {
 902                         case GTK_SCROLL_PAGE_BACKWARD:
 903                         case GTK_SCROLL_STEP_BACKWARD:
 904                                 ev_view_previous_page (view);
 905                                 break;
 906                         case GTK_SCROLL_PAGE_FORWARD:
 907                         case GTK_SCROLL_STEP_FORWARD:
 908                                 ev_view_next_page (view);
 909                                 break;
 910                         default:
 911                                 break;
 912                 }
 913                 return;
 914         }
 915
 916         /* Assign values for increment and vertical adjustment */
 917         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 918         value = gtk_adjustment_get_value (adjustment);
 919         upper = gtk_adjustment_get_upper (adjustment);
 920         lower = gtk_adjustment_get_lower (adjustment);
 921         page_size = gtk_adjustment_get_page_size (adjustment);
 922         step_increment = gtk_adjustment_get_step_increment (adjustment);
 923
 924         /* Assign boolean for first and last page */
 925         if (view->current_page == 0)
 926                 first_page = TRUE;
 927         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 928                 last_page = TRUE;
 929
 930         switch (scroll) {
 931                 case GTK_SCROLL_PAGE_BACKWARD:
 932                         /* Do not jump backwards if at the first page */
 933                         if (value == lower && first_page) {
 934                                 /* Do nothing */
 935                                 /* At the top of a page, assign the upper bound limit of previous page */
 936                         } else if (value == lower) {
 937                                 value = upper - page_size;
 938                                 ev_view_previous_page (view);
 939                                 /* Jump to the top */
 940                         } else {
 941                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_BACKWARD);
 942                                 value = MAX (value - increment, lower);
 943                         }
 944                         break;
 945                 case GTK_SCROLL_PAGE_FORWARD:
 946                         /* Do not jump forward if at the last page */
 947                         if (value == (upper - page_size) && last_page) {
 948                                 /* Do nothing */
 949                         /* At the bottom of a page, assign the lower bound limit of next page */
 950                         } else if (value == (upper - page_size)) {
 951                                 value = 0;
 952                                 ev_view_next_page (view);
 953                         /* Jump to the bottom */
 954                         } else {
 955                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_FORWARD);
 956                                 value = MIN (value + increment, upper - page_size);
 957                         }
 958                         break;
 959                 case GTK_SCROLL_STEP_BACKWARD:
 960                         value -= step_increment;
 961                         break;
 962                 case GTK_SCROLL_STEP_FORWARD:
 963                         value += step_increment;
 964                         break;
 965                 case GTK_SCROLL_STEP_DOWN:
 966                         value -= step_increment / 10;
 967                         break;
 968                 case GTK_SCROLL_STEP_UP:
 969                         value += step_increment / 10;
 970                         break;
 971                 default:
 972                         break;
 973         }
 974
 975         value = CLAMP (value, lower, upper - page_size);
 976
 977         gtk_adjustment_set_value (adjustment, value);
 978 }
 979
 980 #define MARGIN 5
 981
 982 static void
 983 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 984 {
 985         GtkWidget *widget = GTK_WIDGET (view);
 986         GtkAdjustment *adjustment;
 987         GtkAllocation allocation;
 988         gdouble adj_value;
 989         int value;
 990
 991         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 992
 993         gtk_widget_get_allocation (widget, &allocation);
 994
 995         adjustment = view->vadjustment;
 996         adj_value = gtk_adjustment_get_value (adjustment);
 997
 998         if (rect->y < adj_value) {
 999                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->y - MARGIN);
1000                 gtk_adjustment_set_value (view->vadjustment, value);
1001         } else if (rect->y + rect->height > adj_value + allocation.height) {
1002                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->y + rect->height -
1003                              allocation.height + MARGIN);
1004                 gtk_adjustment_set_value (view->vadjustment, value);
1005         }
1006
1007         adjustment = view->hadjustment;
1008         adj_value = gtk_adjustment_get_value (adjustment);
1009
1010         if (rect->x < adj_value) {
1011                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->x - MARGIN);
1012                 gtk_adjustment_set_value (view->hadjustment, value);
1013         } else if (rect->x + rect->height > adj_value + allocation.width) {
1014                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->x + rect->width -
1015                              allocation.width + MARGIN);
1016                 gtk_adjustment_set_value (view->hadjustment, value);
1017         }
1018
1019         gtk_widget_queue_resize (GTK_WIDGET (view));
1020 }
1021
1022 /*** Geometry computations ***/
1023
1024 static void
1025 compute_border (EvView *view, int width, int height, GtkBorder *border)
1026 {
1027         ev_document_misc_get_page_border_size (width, height, border);
1028 }
1029
1030 void
1031 _get_page_size_for_scale_and_rotation (EvDocument *document,
1032                                        gint        page,
1033                                        gdouble     scale,
1034                                        gint        rotation,
1035                                        gint       *page_width,
1036                                        gint       *page_height)
1037 {
1038         gdouble w, h;
1039         gint    width, height;
1040
1041         ev_document_get_page_size (document, page, &w, &h);
1042
1043         width = (gint)(w * scale + 0.5);
1044         height = (gint)(h * scale + 0.5);
1045
1046         if (page_width)
1047                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
1048         if (page_height)
1049                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
1050 }
1051
1052 static void
1053 ev_view_get_page_size (EvView *view,
1054                        gint    page,
1055                        gint   *page_width,
1056                        gint   *page_height)
1057 {
1058         _get_page_size_for_scale_and_rotation (view->document,
1059                                                page,
1060                                                view->scale,
1061                                                view->rotation,
1062                                                page_width,
1063                                                page_height);
1064 }
1065
1066 static void
1067 ev_view_get_max_page_size (EvView *view,
1068                            gint   *max_width,
1069                            gint   *max_height)
1070 {
1071         double w, h;
1072         gint   width, height;
1073
1074         ev_document_get_max_page_size (view->document, &w, &h);
1075
1076         width = (gint)(w * view->scale + 0.5);
1077         height = (gint)(h * view->scale + 0.5);
1078
1079         if (max_width)
1080                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
1081         if (max_height)
1082                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
1083 }
1084
1085 static void
1086 get_page_y_offset (EvView *view, int page, int *y_offset)
1087 {
1088         int max_width, offset;
1089         GtkBorder border;
1090
1091         g_return_if_fail (y_offset != NULL);
1092
1093         ev_view_get_max_page_size (view, &max_width, NULL);
1094         compute_border (view, max_width, max_width, &border);
1095
1096         if (view->dual_page) {
1097                 ev_view_get_height_to_page (view, page, NULL, &offset);
1098                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
1099                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
1100         } else {
1101                 ev_view_get_height_to_page (view, page, &offset, NULL);
1102                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
1103         }
1104
1105         *y_offset = offset;
1106         return;
1107 }
1108
1109 gboolean
1110 ev_view_get_page_extents (EvView       *view,
1111                           gint          page,
1112                           GdkRectangle *page_area,
1113                           GtkBorder    *border)
1114 {
1115         GtkWidget *widget;
1116         int width, height;
1117         GtkAllocation allocation;
1118
1119         widget = GTK_WIDGET (view);
1120         gtk_widget_get_allocation (widget, &allocation);
1121
1122         /* Get the size of the page */
1123         ev_view_get_page_size (view, page, &width, &height);
1124         compute_border (view, width, height, border);
1125         page_area->width = width + border->left + border->right;
1126         page_area->height = height + border->top + border->bottom;
1127
1128         if (view->continuous) {
1129                 gint max_width;
1130                 gint x, y;
1131
1132                 ev_view_get_max_page_size (view, &max_width, NULL);
1133                 max_width = max_width + border->left + border->right;
1134                 /* Get the location of the bounding box */
1135                 if (view->dual_page) {
1136                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1137                         x = x + MAX (0, allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1138                         if (page % 2 == get_dual_even_left (view))
1139                                 x = x + (max_width - width - border->left - border->right);
1140                 } else {
1141                         x = view->spacing;
1142                         x = x + MAX (0, allocation.width - (width + view->spacing * 2)) / 2;
1143                 }
1144
1145                 get_page_y_offset (view, page, &y);
1146
1147                 page_area->x = x;
1148                 page_area->y = y;
1149         } else {
1150                 gint x, y;
1151                 if (view->dual_page) {
1152                         gint width_2, height_2;
1153                         gint max_width = width;
1154                         gint max_height = height;
1155                         GtkBorder overall_border;
1156                         gint other_page;
1157
1158                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1159
1160                         /* First, we get the bounding box of the two pages */
1161                         if (other_page < ev_document_get_n_pages (view->document)
1162                             && (0 <= other_page)) {
1163                                 ev_view_get_page_size (view, other_page,
1164                                                        &width_2, &height_2);
1165                                 if (width_2 > width)
1166                                         max_width = width_2;
1167                                 if (height_2 > height)
1168                                         max_height = height_2;
1169                         }
1170                         compute_border (view, max_width, max_height, &overall_border);
1171
1172                         /* Find the offsets */
1173                         x = view->spacing;
1174                         y = view->spacing;
1175
1176                         /* Adjust for being the left or right page */
1177                         if (page % 2 == get_dual_even_left (view))
1178                                 x = x + max_width - width;
1179                         else
1180                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1181
1182                         y = y + (max_height - height)/2;
1183
1184                         /* Adjust for extra allocation */
1185                         x = x + MAX (0, allocation.width -
1186                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1187                         y = y + MAX (0, allocation.height - (height + view->spacing * 2))/2;
1188                 } else {
1189                         x = view->spacing;
1190                         y = view->spacing;
1191
1192                         /* Adjust for extra allocation */
1193                         x = x + MAX (0, allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1194                         y = y + MAX (0, allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1195                 }
1196
1197                 page_area->x = x;
1198                 page_area->y = y;
1199         }
1200
1201         return TRUE;
1202 }
1203
1204 static void
1205 get_doc_page_size (EvView  *view,
1206                    gint     page,
1207                    gdouble *width,
1208                    gdouble *height)
1209 {
1210         double w, h;
1211
1212         ev_document_get_page_size (view->document, page, &w, &h);
1213         if (view->rotation == 0 || view->rotation == 180) {
1214                 if (width) *width = w;
1215                 if (height) *height = h;
1216         } else {
1217                 if (width) *width = h;
1218                 if (height) *height = w;
1219         }
1220 }
1221
1222 static void
1223 view_point_to_doc_point (EvView *view,
1224                          GdkPoint *view_point,
1225                          GdkRectangle *page_area,
1226                          double  *doc_point_x,
1227                          double  *doc_point_y)
1228 {
1229         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1230         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1231 }
1232
1233 static void
1234 view_rect_to_doc_rect (EvView *view,
1235                        GdkRectangle *view_rect,
1236                        GdkRectangle *page_area,
1237                        EvRectangle  *doc_rect)
1238 {
1239         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1240         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1241         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1242         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1243 }
1244
1245 static void
1246 doc_point_to_view_point (EvView       *view,
1247                          int           page,
1248                          EvPoint      *doc_point,
1249                          GdkPoint     *view_point)
1250 {
1251         GdkRectangle page_area;
1252         GtkBorder border;
1253         double x, y, view_x, view_y;
1254         gdouble width, height;
1255
1256         get_doc_page_size (view, page, &width, &height);
1257
1258         if (view->rotation == 0) {
1259                 x = doc_point->x;
1260                 y = doc_point->y;
1261         } else if (view->rotation == 90) {
1262                 x = width - doc_point->y;
1263                 y = doc_point->x;
1264         } else if (view->rotation == 180) {
1265                 x = width - doc_point->x;
1266                 y = height - doc_point->y;
1267         } else if (view->rotation == 270) {
1268                 x = doc_point->y;
1269                 y = height - doc_point->x;
1270         } else {
1271                 g_assert_not_reached ();
1272         }
1273
1274         ev_view_get_page_extents (view, page, &page_area, &border);
1275
1276         view_x = CLAMP (x * view->scale, 0, page_area.width);
1277         view_y = CLAMP (y * view->scale, 0, page_area.height);
1278         view_point->x = view_x + page_area.x;
1279         view_point->y = view_y + page_area.y;
1280 }
1281
1282 static void
1283 doc_rect_to_view_rect (EvView       *view,
1284                        int           page,
1285                        EvRectangle  *doc_rect,
1286                        GdkRectangle *view_rect)
1287 {
1288         GdkRectangle page_area;
1289         GtkBorder border;
1290         double x, y, w, h;
1291         gdouble width, height;
1292
1293         get_doc_page_size (view, page, &width, &height);
1294
1295         if (view->rotation == 0) {
1296                 x = doc_rect->x1;
1297                 y = doc_rect->y1;
1298                 w = doc_rect->x2 - doc_rect->x1;
1299                 h = doc_rect->y2 - doc_rect->y1;
1300         } else if (view->rotation == 90) {
1301                 x = width - doc_rect->y2;
1302                 y = doc_rect->x1;
1303                 w = doc_rect->y2 - doc_rect->y1;
1304                 h = doc_rect->x2 - doc_rect->x1;
1305         } else if (view->rotation == 180) {
1306                 x = width - doc_rect->x2;
1307                 y = height - doc_rect->y2;
1308                 w = doc_rect->x2 - doc_rect->x1;
1309                 h = doc_rect->y2 - doc_rect->y1;
1310         } else if (view->rotation == 270) {
1311                 x = doc_rect->y1;
1312                 y = height - doc_rect->x2;
1313                 w = doc_rect->y2 - doc_rect->y1;
1314                 h = doc_rect->x2 - doc_rect->x1;
1315         } else {
1316                 g_assert_not_reached ();
1317         }
1318
1319         ev_view_get_page_extents (view, page, &page_area, &border);
1320
1321         view_rect->x = x * view->scale + page_area.x;
1322         view_rect->y = y * view->scale + page_area.y;
1323         view_rect->width = w * view->scale;
1324         view_rect->height = h * view->scale;
1325 }
1326
1327 static gboolean
1328 get_dual_even_left (EvView *view)
1329 {
1330         return (ev_document_get_n_pages (view->document) > 2);
1331 }
1332
1333 static void
1334 find_page_at_location (EvView  *view,
1335                        gdouble  x,
1336                        gdouble  y,
1337                        gint    *page,
1338                        gint    *x_offset,
1339                        gint    *y_offset)
1340 {
1341         int i;
1342
1343         if (view->document == NULL)
1344                 return;
1345
1346         g_assert (page);
1347         g_assert (x_offset);
1348         g_assert (y_offset);
1349
1350         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1351                 GdkRectangle page_area;
1352                 GtkBorder border;
1353
1354                 if (! ev_view_get_page_extents (view, i, &page_area, &border))
1355                         continue;
1356
1357                 if ((x >= page_area.x + border.left) &&
1358                     (x < page_area.x + page_area.width - border.right) &&
1359                     (y >= page_area.y + border.top) &&
1360                     (y < page_area.y + page_area.height - border.bottom)) {
1361                         *page = i;
1362                         *x_offset = x - (page_area.x + border.left);
1363                         *y_offset = y - (page_area.y + border.top);
1364                         return;
1365                 }
1366         }
1367
1368         *page = -1;
1369 }
1370
1371 static gboolean
1372 location_in_text (EvView  *view,
1373                   gdouble  x,
1374                   gdouble  y)
1375 {
1376         cairo_region_t *region;
1377         gint page = -1;
1378         gint x_offset = 0, y_offset = 0;
1379
1380         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1381
1382         if (page == -1)
1383                 return FALSE;
1384
1385         region = ev_page_cache_get_text_mapping (view->page_cache, page);
1386
1387         if (region)
1388                 return cairo_region_contains_point (region, x_offset / view->scale, y_offset / view->scale);
1389         else
1390                 return FALSE;
1391 }
1392
1393 static gboolean
1394 location_in_selected_text (EvView  *view,
1395                            gdouble  x,
1396                            gdouble  y)
1397 {
1398         gint page = -1;
1399         gint x_offset = 0, y_offset = 0;
1400         EvViewSelection *selection;
1401         GList *l = NULL;
1402
1403         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1404                 selection = (EvViewSelection *)l->data;
1405
1406                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1407
1408                 if (page != selection->page)
1409                         continue;
1410
1411                 if (selection->covered_region &&
1412                     cairo_region_contains_point (selection->covered_region, x_offset, y_offset))
1413                         return TRUE;
1414         }
1415
1416         return FALSE;
1417 }
1418
1419 static gboolean
1420 get_doc_point_from_offset (EvView *view,
1421                            gint    page,
1422                            gint    x_offset,
1423                            gint    y_offset,
1424                            gint   *x_new,
1425                            gint   *y_new)
1426 {
1427         gdouble width, height;
1428         double x, y;
1429
1430         get_doc_page_size (view, page, &width, &height);
1431
1432         x_offset = x_offset / view->scale;
1433         y_offset = y_offset / view->scale;
1434
1435         if (view->rotation == 0) {
1436                 x = x_offset;
1437                 y = y_offset;
1438         } else if (view->rotation == 90) {
1439                 x = y_offset;
1440                 y = width - x_offset;
1441         } else if (view->rotation == 180) {
1442                 x = width - x_offset;
1443                 y = height - y_offset;
1444         } else if (view->rotation == 270) {
1445                 x = height - y_offset;
1446                 y = x_offset;
1447         } else {
1448                 g_assert_not_reached ();
1449         }
1450
1451         *x_new = x;
1452         *y_new = y;
1453
1454         return TRUE;
1455 }
1456
1457 static gboolean
1458 get_doc_point_from_location (EvView  *view,
1459                              gdouble  x,
1460                              gdouble  y,
1461                              gint    *page,
1462                              gint    *x_new,
1463                              gint    *y_new)
1464 {
1465         gint x_offset = 0, y_offset = 0;
1466
1467         x += view->scroll_x;
1468         y += view->scroll_y;
1469         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1470         if (*page == -1)
1471                 return FALSE;
1472
1473         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1474 }
1475
1476 static void
1477 ev_view_get_area_from_mapping (EvView        *view,
1478                                guint          page,
1479                                EvMappingList *mapping_list,
1480                                gconstpointer  data,
1481                                GdkRectangle  *area)
1482 {
1483         EvMapping *mapping;
1484
1485         mapping = ev_mapping_list_find (mapping_list, data);
1486         doc_rect_to_view_rect (view, page, &mapping->area, area);
1487         area->x -= view->scroll_x;
1488         area->y -= view->scroll_y;
1489 }
1490
1491
1492 /*** Hyperref ***/
1493 static EvLink *
1494 ev_view_get_link_at_location (EvView  *view,
1495                               gdouble  x,
1496                               gdouble  y)
1497 {
1498         gint page = -1;
1499         gint x_new = 0, y_new = 0;
1500         EvMappingList *link_mapping;
1501
1502         if (!EV_IS_DOCUMENT_LINKS (view->document))
1503                 return NULL;
1504
1505         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1506                 return NULL;
1507
1508         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
1509
1510         if (link_mapping)
1511                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1512         else
1513                 return NULL;
1514 }
1515
1516 static void
1517 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1518 {
1519         EvPoint doc_point;
1520         gdouble zoom, left, top;
1521         gboolean change_left, change_top;
1522         GtkAllocation allocation;
1523
1524         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1525
1526         left = ev_link_dest_get_left (dest, &change_left);
1527         top = ev_link_dest_get_top (dest, &change_top);
1528
1529         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1530                                        ev_link_dest_get_bottom (dest) - top,
1531                                        allocation.width,
1532                                        allocation.height);
1533
1534         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1535         ev_document_model_set_scale (view->model, zoom);
1536
1537         doc_point.x = change_left ? left : 0;
1538         doc_point.y = change_top ? top : 0;
1539         view->pending_point = doc_point;
1540
1541         ev_view_change_page (view, ev_link_dest_get_page (dest));
1542 }
1543
1544 static void
1545 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1546 {
1547         EvPoint doc_point;
1548         gdouble doc_width, doc_height;
1549         gint page;
1550         double zoom, left;
1551         gboolean change_left;
1552         GtkAllocation allocation;
1553
1554         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1555
1556         page = ev_link_dest_get_page (dest);
1557         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1558
1559         left = ev_link_dest_get_left (dest, &change_left);
1560         doc_point.x = change_left ? left : 0;
1561         doc_point.y = 0;
1562
1563         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1564                                          allocation.width,
1565                                          allocation.height);
1566
1567         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1568         ev_document_model_set_scale (view->model, zoom);
1569
1570         view->pending_point = doc_point;
1571
1572         ev_view_change_page (view, page);
1573 }
1574
1575 static void
1576 goto_fith_dest (EvView *view, EvLinkDest *dest)
1577 {
1578         EvPoint doc_point;
1579         gdouble doc_width, doc_height;
1580         gint page;
1581         gdouble zoom, top;
1582         gboolean change_top;
1583         GtkAllocation allocation;
1584
1585         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1586
1587         page = ev_link_dest_get_page (dest);
1588         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1589
1590         top = ev_link_dest_get_top (dest, &change_top);
1591
1592         doc_point.x = 0;
1593         doc_point.y = change_top ? top : 0;
1594
1595         zoom = zoom_for_size_fit_width (doc_width, top,
1596                                         allocation.width,
1597                                         allocation.height);
1598
1599         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1600         ev_document_model_set_scale (view->model, zoom);
1601
1602         view->pending_point = doc_point;
1603
1604         ev_view_change_page (view, page);
1605 }
1606
1607 static void
1608 goto_fit_dest (EvView *view, EvLinkDest *dest)
1609 {
1610         double zoom;
1611         gdouble doc_width, doc_height;
1612         int page;
1613         GtkAllocation allocation;
1614
1615         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1616
1617         page = ev_link_dest_get_page (dest);
1618         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1619
1620         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1621                                        allocation.width,
1622                                        allocation.height);
1623
1624         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1625         ev_document_model_set_scale (view->model, zoom);
1626
1627         ev_view_change_page (view, page);
1628 }
1629
1630 static void
1631 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1632 {
1633         EvPoint doc_point;
1634         gint page;
1635         gdouble zoom, left, top;
1636         gboolean change_zoom, change_left, change_top;
1637
1638         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1639         page = ev_link_dest_get_page (dest);
1640
1641         if (change_zoom && zoom > 1) {
1642                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1643                 ev_document_model_set_scale (view->model, zoom);
1644         }
1645
1646         left = ev_link_dest_get_left (dest, &change_left);
1647         top = ev_link_dest_get_top (dest, &change_top);
1648
1649         doc_point.x = change_left ? left : 0;
1650         doc_point.y = change_top ? top : 0;
1651         view->pending_point = doc_point;
1652
1653         ev_view_change_page (view, page);
1654 }
1655
1656 static void
1657 goto_dest (EvView *view, EvLinkDest *dest)
1658 {
1659         EvLinkDestType type;
1660         int page, n_pages, current_page;
1661
1662         page = ev_link_dest_get_page (dest);
1663         n_pages = ev_document_get_n_pages (view->document);
1664
1665         if (page < 0 || page >= n_pages)
1666                 return;
1667
1668         current_page = view->current_page;
1669
1670         type = ev_link_dest_get_dest_type (dest);
1671
1672         switch (type) {
1673                 case EV_LINK_DEST_TYPE_PAGE:
1674                         ev_document_model_set_page (view->model, page);
1675                         break;
1676                 case EV_LINK_DEST_TYPE_FIT:
1677                         goto_fit_dest (view, dest);
1678                         break;
1679                 case EV_LINK_DEST_TYPE_FITH:
1680                         goto_fith_dest (view, dest);
1681                         break;
1682                 case EV_LINK_DEST_TYPE_FITV:
1683                         goto_fitv_dest (view, dest);
1684                         break;
1685                 case EV_LINK_DEST_TYPE_FITR:
1686                         goto_fitr_dest (view, dest);
1687                         break;
1688                 case EV_LINK_DEST_TYPE_XYZ:
1689                         goto_xyz_dest (view, dest);
1690                         break;
1691                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1692                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1693                         break;
1694                 default:
1695                         g_assert_not_reached ();
1696         }
1697
1698         if (current_page != view->current_page)
1699                 ev_document_model_set_page (view->model, view->current_page);
1700 }
1701
1702 static void
1703 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1704 {
1705         EvLinkDestType type;
1706
1707         type = ev_link_dest_get_dest_type (dest);
1708
1709         if (type == EV_LINK_DEST_TYPE_NAMED) {
1710                 EvLinkDest  *dest2;
1711                 const gchar *named_dest;
1712
1713                 named_dest = ev_link_dest_get_named_dest (dest);
1714                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1715                                                           named_dest);
1716                 if (dest2) {
1717                         goto_dest (view, dest2);
1718                         g_object_unref (dest2);
1719                 }
1720
1721                 return;
1722         }
1723
1724         goto_dest (view, dest);
1725 }
1726
1727 void
1728 ev_view_handle_link (EvView *view, EvLink *link)
1729 {
1730         EvLinkAction    *action = NULL;
1731         EvLinkActionType type;
1732
1733         action = ev_link_get_action (link);
1734         if (!action)
1735                 return;
1736
1737         type = ev_link_action_get_action_type (action);
1738
1739         switch (type) {
1740                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1741                         EvLinkDest *dest;
1742
1743                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1744
1745                         dest = ev_link_action_get_dest (action);
1746                         ev_view_goto_dest (view, dest);
1747                 }
1748                         break;
1749                 case EV_LINK_ACTION_TYPE_LAYERS_STATE: {
1750                         GList            *show, *hide, *toggle;
1751                         GList            *l;
1752                         EvDocumentLayers *document_layers;
1753
1754                         document_layers = EV_DOCUMENT_LAYERS (view->document);
1755
1756                         show = ev_link_action_get_show_list (action);
1757                         for (l = show; l; l = g_list_next (l)) {
1758                                 ev_document_layers_show_layer (document_layers, EV_LAYER (l->data));
1759                         }
1760
1761                         hide = ev_link_action_get_hide_list (action);
1762                         for (l = hide; l; l = g_list_next (l)) {
1763                                 ev_document_layers_hide_layer (document_layers, EV_LAYER (l->data));
1764                         }
1765
1766                         toggle = ev_link_action_get_toggle_list (action);
1767                         for (l = toggle; l; l = g_list_next (l)) {
1768                                 EvLayer *layer = EV_LAYER (l->data);
1769
1770                                 if (ev_document_layers_layer_is_visible (document_layers, layer)) {
1771                                         ev_document_layers_hide_layer (document_layers, layer);
1772                                 } else {
1773                                         ev_document_layers_show_layer (document_layers, layer);
1774                                 }
1775                         }
1776
1777                         g_signal_emit (view, signals[SIGNAL_LAYERS_CHANGED], 0);
1778                         ev_view_reload_page (view, view->current_page, NULL);
1779                 }
1780                         break;
1781                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1782                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1783                 case EV_LINK_ACTION_TYPE_LAUNCH:
1784                 case EV_LINK_ACTION_TYPE_NAMED:
1785                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1786                         break;
1787         }
1788 }
1789
1790 static char *
1791 tip_from_action_named (EvLinkAction *action)
1792 {
1793         const gchar *name = ev_link_action_get_name (action);
1794
1795         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1796                 return g_strdup (_("Go to first page"));
1797         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1798                 return g_strdup (_("Go to previous page"));
1799         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1800                 return g_strdup (_("Go to next page"));
1801         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1802                 return g_strdup (_("Go to last page"));
1803         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1804                 return g_strdup (_("Go to page"));
1805         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1806                 return g_strdup (_("Find"));
1807         }
1808
1809         return NULL;
1810 }
1811
1812 static char *
1813 tip_from_link (EvView *view, EvLink *link)
1814 {
1815         EvLinkAction *action;
1816         EvLinkActionType type;
1817         char *msg = NULL;
1818         char *page_label;
1819         const char *title;
1820
1821         action = ev_link_get_action (link);
1822         title = ev_link_get_title (link);
1823
1824         if (!action)
1825                 return title ? g_strdup (title) : NULL;
1826
1827         type = ev_link_action_get_action_type (action);
1828
1829         switch (type) {
1830                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1831                         page_label = ev_document_links_get_dest_page_label (EV_DOCUMENT_LINKS (view->document),
1832                                                                             ev_link_action_get_dest (action));
1833                         if (page_label) {
1834                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1835                                 g_free (page_label);
1836                         }
1837                         break;
1838                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1839                         if (title) {
1840                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1841                                                        ev_link_action_get_filename (action));
1842                         } else {
1843                                 msg = g_strdup_printf (_("Go to file “%s”"),
1844                                                        ev_link_action_get_filename (action));
1845                         }
1846                         break;
1847                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1848                         msg = g_strdup (ev_link_action_get_uri (action));
1849                         break;
1850                 case EV_LINK_ACTION_TYPE_LAUNCH:
1851                         msg = g_strdup_printf (_("Launch %s"),
1852                                                ev_link_action_get_filename (action));
1853                         break;
1854                 case EV_LINK_ACTION_TYPE_NAMED:
1855                         msg = tip_from_action_named (action);
1856                         break;
1857                 default:
1858                         if (title)
1859                                 msg = g_strdup (title);
1860                         break;
1861         }
1862
1863         return msg;
1864 }
1865
1866 static void
1867 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1868 {
1869         EvLink       *link;
1870         EvFormField  *field;
1871         EvAnnotation *annot = NULL;
1872
1873         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1874                 return;
1875
1876         if (view->adding_annot) {
1877                 if (view->cursor != EV_VIEW_CURSOR_ADD)
1878                         ev_view_set_cursor (view, EV_VIEW_CURSOR_ADD);
1879                 return;
1880         }
1881
1882         if (view->drag_info.in_drag) {
1883                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1884                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1885                 return;
1886         }
1887
1888         if (view->scroll_info.autoscrolling) {
1889                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1890                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1891                 return;
1892         }
1893
1894         link = ev_view_get_link_at_location (view, x, y);
1895         if (link) {
1896                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1897         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1898                 if (field->is_read_only) {
1899                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1900                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1901                             view->cursor == EV_VIEW_CURSOR_DRAG)
1902                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1903                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1904                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1905                 } else {
1906                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1907                 }
1908         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1909                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1910         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1911                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1912         } else {
1913                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1914                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1915                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1916                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL ||
1917                     view->cursor == EV_VIEW_CURSOR_ADD)
1918                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1919         }
1920
1921         if (link || annot)
1922                 g_object_set (view, "has-tooltip", TRUE, NULL);
1923 }
1924
1925 /*** Images ***/
1926 static EvImage *
1927 ev_view_get_image_at_location (EvView  *view,
1928                                gdouble  x,
1929                                gdouble  y)
1930 {
1931         gint page = -1;
1932         gint x_new = 0, y_new = 0;
1933         EvMappingList *image_mapping;
1934
1935         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1936                 return NULL;
1937
1938         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1939                 return NULL;
1940
1941         image_mapping = ev_page_cache_get_image_mapping (view->page_cache, page);
1942
1943         if (image_mapping)
1944                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1945         else
1946                 return NULL;
1947 }
1948
1949 /*** Forms ***/
1950 static EvFormField *
1951 ev_view_get_form_field_at_location (EvView  *view,
1952                                     gdouble  x,
1953                                     gdouble  y)
1954 {
1955         gint page = -1;
1956         gint x_new = 0, y_new = 0;
1957         EvMappingList *forms_mapping;
1958
1959         if (!EV_IS_DOCUMENT_FORMS (view->document))
1960                 return NULL;
1961
1962         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1963                 return NULL;
1964
1965         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache, page);
1966
1967         if (forms_mapping)
1968                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1969         else
1970                 return NULL;
1971 }
1972
1973 static cairo_region_t *
1974 ev_view_form_field_get_region (EvView      *view,
1975                                EvFormField *field)
1976 {
1977         GdkRectangle   view_area;
1978         EvMappingList *forms_mapping;
1979
1980         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
1981                                                               field->page->index);
1982         ev_view_get_area_from_mapping (view, field->page->index,
1983                                        forms_mapping,
1984                                        field, &view_area);
1985
1986         return cairo_region_create_rectangle (&view_area);
1987 }
1988
1989 static gboolean
1990 ev_view_forms_remove_widgets (EvView *view)
1991 {
1992         ev_view_remove_all (view);
1993
1994         return FALSE;
1995 }
1996
1997 static void
1998 ev_view_form_field_destroy (GtkWidget *widget,
1999                             EvView    *view)
2000 {
2001         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
2002 }
2003
2004 static GtkWidget *
2005 ev_view_form_field_button_create_widget (EvView      *view,
2006                                          EvFormField *field)
2007 {
2008         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
2009         cairo_region_t    *field_region = NULL;
2010
2011         switch (field_button->type) {
2012                 case EV_FORM_FIELD_BUTTON_PUSH:
2013                         return NULL;
2014                 case EV_FORM_FIELD_BUTTON_CHECK:
2015                 case EV_FORM_FIELD_BUTTON_RADIO: {
2016                         gboolean       state;
2017                         EvMappingList *forms_mapping;
2018                         GList         *l;
2019
2020                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
2021                                                                                field);
2022
2023                         /* FIXME: it actually depends on NoToggleToOff flags */
2024                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
2025                             state && field_button->state)
2026                                 return NULL;
2027
2028                         field_region = ev_view_form_field_get_region (view, field);
2029
2030                         /* For radio buttons and checkbox buttons that are in a set
2031                          * we need to update also the region for the current selected item
2032                          */
2033                         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2034                                                                               field->page->index);
2035                         for (l = ev_mapping_list_get_list (forms_mapping); l; l = g_list_next (l)) {
2036                                 EvFormField *button = ((EvMapping *)(l->data))->data;
2037                                 cairo_region_t *button_region;
2038
2039                                 if (button->id == field->id)
2040                                         continue;
2041
2042                                 /* FIXME: only buttons in the same group should be updated */
2043                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
2044                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
2045                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
2046                                         continue;
2047
2048                                 button_region = ev_view_form_field_get_region (view, button);
2049                                 cairo_region_union (field_region, button_region);
2050                                 cairo_region_destroy (button_region);
2051                         }
2052
2053                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
2054                                                                        field, !state);
2055                         field_button->state = !state;
2056                 }
2057                         break;
2058         }
2059
2060         ev_view_reload_page (view, field->page->index, field_region);
2061         cairo_region_destroy (field_region);
2062
2063         return NULL;
2064 }
2065
2066 static void
2067 ev_view_form_field_text_save (EvView    *view,
2068                               GtkWidget *widget)
2069 {
2070         EvFormField *field;
2071
2072         if (!view->document)
2073                 return;
2074
2075         field = g_object_get_data (G_OBJECT (widget), "form-field");
2076
2077         if (field->changed) {
2078                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2079                 cairo_region_t  *field_region;
2080
2081                 field_region = ev_view_form_field_get_region (view, field);
2082
2083                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
2084                                                             field, field_text->text);
2085                 field->changed = FALSE;
2086                 ev_view_reload_page (view, field->page->index, field_region);
2087                 cairo_region_destroy (field_region);
2088         }
2089 }
2090
2091 static void
2092 ev_view_form_field_text_changed (GtkWidget   *widget,
2093                                  EvFormField *field)
2094 {
2095         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2096         gchar           *text = NULL;
2097
2098         if (GTK_IS_ENTRY (widget)) {
2099                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
2100         } else if (GTK_IS_TEXT_BUFFER (widget)) {
2101                 GtkTextIter start, end;
2102
2103                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
2104                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
2105                                                  &start, &end, FALSE);
2106         }
2107
2108         if (!field_text->text ||
2109             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
2110                 g_free (field_text->text);
2111                 field_text->text = text;
2112                 field->changed = TRUE;
2113         }
2114 }
2115
2116 static GtkWidget *
2117 ev_view_form_field_text_create_widget (EvView      *view,
2118                                        EvFormField *field)
2119 {
2120         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2121         GtkWidget       *text = NULL;
2122         gchar           *txt;
2123
2124         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2125                                                           field);
2126
2127         switch (field_text->type) {
2128                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2129                         /* TODO */
2130                 case EV_FORM_FIELD_TEXT_NORMAL:
2131                         text = gtk_entry_new ();
2132                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2133                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2134                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2135
2136                         if (txt) {
2137                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2138                                 g_free (txt);
2139                         }
2140
2141                         g_signal_connect (text, "changed",
2142                                           G_CALLBACK (ev_view_form_field_text_changed),
2143                                           field);
2144                         g_signal_connect_after (text, "activate",
2145                                                 G_CALLBACK (ev_view_form_field_destroy),
2146                                                 view);
2147                         break;
2148                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2149                         GtkTextBuffer *buffer;
2150
2151                         text = gtk_text_view_new ();
2152                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2153
2154                         if (txt) {
2155                                 gtk_text_buffer_set_text (buffer, txt, -1);
2156                                 g_free (txt);
2157                         }
2158
2159                         g_signal_connect (buffer, "changed",
2160                                           G_CALLBACK (ev_view_form_field_text_changed),
2161                                           field);
2162                 }
2163                         break;
2164         }
2165
2166         g_object_weak_ref (G_OBJECT (text),
2167                            (GWeakNotify)ev_view_form_field_text_save,
2168                            view);
2169
2170         return text;
2171 }
2172
2173 static void
2174 ev_view_form_field_choice_save (EvView    *view,
2175                                 GtkWidget *widget)
2176 {
2177         EvFormField *field;
2178
2179         if (!view->document)
2180                 return;
2181
2182         field = g_object_get_data (G_OBJECT (widget), "form-field");
2183
2184         if (field->changed) {
2185                 GList             *l;
2186                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2187                 cairo_region_t    *field_region;
2188
2189                 field_region = ev_view_form_field_get_region (view, field);
2190
2191                 if (field_choice->is_editable) {
2192                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2193                                                                       field, field_choice->text);
2194                 } else {
2195                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2196                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2197                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2198                                                                                  field,
2199                                                                                  GPOINTER_TO_INT (l->data));
2200                         }
2201                 }
2202                 field->changed = FALSE;
2203                 ev_view_reload_page (view, field->page->index, field_region);
2204                 cairo_region_destroy (field_region);
2205         }
2206 }
2207
2208 static void
2209 ev_view_form_field_choice_changed (GtkWidget   *widget,
2210                                    EvFormField *field)
2211 {
2212         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2213
2214         if (GTK_IS_COMBO_BOX (widget)) {
2215                 gint item;
2216
2217                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2218                 if (!field_choice->selected_items ||
2219                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2220                         g_list_free (field_choice->selected_items);
2221                         field_choice->selected_items = NULL;
2222                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2223                                                                        GINT_TO_POINTER (item));
2224                         field->changed = TRUE;
2225                 }
2226
2227                 if (gtk_combo_box_get_has_entry (GTK_COMBO_BOX (widget))) {
2228                         const gchar *text;
2229
2230                         text = gtk_entry_get_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (widget))));
2231                         if (!field_choice->text ||
2232                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2233                                 g_free (field_choice->text);
2234                                 field_choice->text = g_strdup (text);
2235                                 field->changed = TRUE;
2236                         }
2237                 }
2238         } else if (GTK_IS_TREE_SELECTION (widget)) {
2239                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2240                 GtkTreeModel     *model;
2241                 GList            *items, *l;
2242
2243                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2244                 g_list_free (field_choice->selected_items);
2245                 field_choice->selected_items = NULL;
2246
2247                 for (l = items; l && l->data; l = g_list_next (l)) {
2248                         GtkTreeIter  iter;
2249                         GtkTreePath *path = (GtkTreePath *)l->data;
2250                         gint         item;
2251
2252                         gtk_tree_model_get_iter (model, &iter, path);
2253                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2254
2255                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2256                                                                        GINT_TO_POINTER (item));
2257
2258                         gtk_tree_path_free (path);
2259                 }
2260
2261                 g_list_free (items);
2262
2263                 field->changed = TRUE;
2264         }
2265 }
2266
2267 static GtkWidget *
2268 ev_view_form_field_choice_create_widget (EvView      *view,
2269                                          EvFormField *field)
2270 {
2271         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2272         GtkWidget         *choice;
2273         GtkTreeModel      *model;
2274         gint               n_items, i;
2275         gint               selected_item = 0;
2276
2277         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2278                                                                    field);
2279         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2280         for (i = 0; i < n_items; i++) {
2281                 GtkTreeIter iter;
2282                 gchar      *item;
2283
2284                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2285                                                                      field, i);
2286                 if (ev_document_forms_form_field_choice_is_item_selected (
2287                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2288                         selected_item = i;
2289                         /* FIXME: we need a get_selected_items function in poppler */
2290                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2291                                                                        GINT_TO_POINTER (i));
2292                 }
2293
2294                 if (item) {
2295                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2296                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2297                                             0, item,
2298                                             1, i,
2299                                             -1);
2300                         g_free (item);
2301                 }
2302         }
2303
2304         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2305                 GtkCellRenderer  *renderer;
2306                 GtkWidget        *tree_view;
2307                 GtkTreeSelection *selection;
2308
2309                 tree_view = gtk_tree_view_new_with_model (model);
2310                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2311
2312                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2313                 if (field_choice->multi_select) {
2314                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2315                 }
2316
2317                 /* TODO: set selected items */
2318
2319                 renderer = gtk_cell_renderer_text_new ();
2320                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2321                                                              0,
2322                                                              "choix", renderer,
2323                                                              "text", 0,
2324                                                              NULL);
2325
2326                 choice = gtk_scrolled_window_new (NULL, NULL);
2327                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2328                                                 GTK_POLICY_AUTOMATIC,
2329                                                 GTK_POLICY_AUTOMATIC);
2330                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2331                 gtk_widget_show (tree_view);
2332
2333                 g_signal_connect (selection, "changed",
2334                                   G_CALLBACK (ev_view_form_field_choice_changed),
2335                                   field);
2336                 g_signal_connect_after (selection, "changed",
2337                                         G_CALLBACK (ev_view_form_field_destroy),
2338                                         view);
2339         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2340                 gchar *text;
2341
2342                 /* FIXME once gtk bug 633050 is fixed */
2343                 choice = g_object_new (GTK_TYPE_COMBO_BOX, "has-entry", TRUE, "model", model, NULL);
2344
2345                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2346                 if (text) {
2347                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2348                         g_free (text);
2349                 }
2350
2351                 g_signal_connect (choice, "changed",
2352                                   G_CALLBACK (ev_view_form_field_choice_changed),
2353                                   field);
2354                 g_signal_connect_after (gtk_bin_get_child (GTK_BIN (choice)),
2355                                         "activate",
2356                                         G_CALLBACK (ev_view_form_field_destroy),
2357                                         view);
2358         } else { /* ComboBoxText */
2359                 GtkCellRenderer *renderer;
2360
2361                 choice = gtk_combo_box_new_with_model (model);
2362                 renderer = gtk_cell_renderer_text_new ();
2363                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2364                                             renderer, TRUE);
2365                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2366                                                 renderer,
2367                                                 "text", 0,
2368                                                 NULL);
2369                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2370                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2371
2372                 g_signal_connect (choice, "changed",
2373                                   G_CALLBACK (ev_view_form_field_choice_changed),
2374                                   field);
2375                 g_signal_connect_after (choice, "changed",
2376                                         G_CALLBACK (ev_view_form_field_destroy),
2377                                         view);
2378         }
2379
2380         g_object_unref (model);
2381
2382         g_object_weak_ref (G_OBJECT (choice),
2383                            (GWeakNotify)ev_view_form_field_choice_save,
2384                            view);
2385
2386         return choice;
2387 }
2388
2389 static void
2390 ev_view_handle_form_field (EvView      *view,
2391                            EvFormField *field,
2392                            gdouble      x,
2393                            gdouble      y)
2394 {
2395         GtkWidget     *field_widget = NULL;
2396         EvMappingList *form_field_mapping;
2397         GdkRectangle   view_area;
2398
2399         if (field->is_read_only)
2400                 return;
2401
2402         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2403                 field_widget = ev_view_form_field_button_create_widget (view, field);
2404         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2405                 field_widget = ev_view_form_field_text_create_widget (view, field);
2406         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2407                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2408         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2409                 /* TODO */
2410         }
2411
2412         /* Form field doesn't require a widget */
2413         if (!field_widget)
2414                 return;
2415
2416         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2417                                 g_object_ref (field),
2418                                 (GDestroyNotify)g_object_unref);
2419
2420         form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2421                                                                    field->page->index);
2422         ev_view_get_area_from_mapping (view, field->page->index,
2423                                        form_field_mapping,
2424                                        field, &view_area);
2425
2426         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2427         gtk_widget_show (field_widget);
2428         gtk_widget_grab_focus (field_widget);
2429 }
2430
2431 /* Annotations */
2432 static EvViewWindowChild *
2433 ev_view_get_window_child (EvView    *view,
2434                           GtkWidget *window)
2435 {
2436         GList *children = view->window_children;
2437
2438         while (children) {
2439                 EvViewWindowChild *child;
2440
2441                 child = (EvViewWindowChild *)children->data;
2442                 children = children->next;
2443
2444                 if (child->window == window)
2445                         return child;
2446         }
2447
2448         return NULL;
2449 }
2450
2451 static void
2452 ev_view_window_child_move (EvView            *view,
2453                            EvViewWindowChild *child,
2454                            gint               x,
2455                            gint               y)
2456 {
2457         GtkAllocation allocation;
2458         gint          width, height;
2459
2460         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
2461         gtk_window_get_size (GTK_WINDOW (child->window), &width, &height);
2462
2463         child->x = x;
2464         child->y = y;
2465         gtk_window_move (GTK_WINDOW (child->window),
2466                          CLAMP (x, child->parent_x,
2467                                 child->parent_x + allocation.width - width),
2468                          CLAMP (y, child->parent_y,
2469                                 child->parent_y + allocation.height - height));
2470 }
2471
2472 static void
2473 ev_view_window_child_move_with_parent (EvView    *view,
2474                                        GtkWidget *window)
2475 {
2476         EvViewWindowChild *child;
2477         gint               root_x, root_y;
2478
2479         child = ev_view_get_window_child (view, window);
2480         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2481                                &root_x, &root_y);
2482         if (root_x != child->parent_x || root_y != child->parent_y) {
2483                 gint dest_x, dest_y;
2484
2485                 dest_x = child->x + (root_x - child->parent_x);
2486                 dest_y = child->y + (root_y - child->parent_y);
2487                 child->parent_x = root_x;
2488                 child->parent_y = root_y;
2489                 ev_view_window_child_move (view, child, dest_x, dest_y);
2490         }
2491
2492         if (child->visible && !gtk_widget_get_visible (window))
2493                 gtk_widget_show (window);
2494 }
2495
2496 static void
2497 ev_view_window_child_put (EvView    *view,
2498                           GtkWidget *window,
2499                           guint      page,
2500                           gint       x,
2501                           gint       y,
2502                           gdouble    orig_x,
2503                           gdouble    orig_y)
2504 {
2505         EvViewWindowChild *child;
2506         gint               root_x, root_y;
2507
2508         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2509                                &root_x, &root_y);
2510
2511         child = g_new0 (EvViewWindowChild, 1);
2512         child->window = window;
2513         child->page = page;
2514         child->orig_x = orig_x;
2515         child->orig_y = orig_y;
2516         child->parent_x = root_x;
2517         child->parent_y = root_y;
2518         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2519         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2520
2521         if (child->visible)
2522                 gtk_widget_show (window);
2523         else
2524                 gtk_widget_hide (window);
2525
2526         view->window_children = g_list_append (view->window_children, child);
2527 }
2528
2529 static EvViewWindowChild *
2530 ev_view_find_window_child_for_annot (EvView       *view,
2531                                      guint         page,
2532                                      EvAnnotation *annot)
2533 {
2534         GList *children = view->window_children;
2535
2536         while (children) {
2537                 EvViewWindowChild *child;
2538                 EvAnnotation      *wannot;
2539
2540                 child = (EvViewWindowChild *)children->data;
2541                 children = children->next;
2542
2543                 if (child->page != page)
2544                         continue;
2545
2546                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2547                 if (ev_annotation_equal (wannot, annot))
2548                         return child;
2549         }
2550
2551         return NULL;
2552 }
2553
2554 static void
2555 ev_view_window_children_free (EvView *view)
2556 {
2557         GList *l;
2558
2559         if (!view->window_children)
2560                 return;
2561
2562         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2563                 EvViewWindowChild *child;
2564
2565                 child = (EvViewWindowChild *)l->data;
2566                 gtk_widget_destroy (GTK_WIDGET (child->window));
2567                 g_free (child);
2568         }
2569         g_list_free (view->window_children);
2570         view->window_children = NULL;
2571         view->window_child_focus = NULL;
2572 }
2573
2574 static void
2575 annotation_window_grab_focus (GtkWidget *widget,
2576                               EvView    *view)
2577 {
2578         if (view->window_child_focus)
2579                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2580         view->window_child_focus = ev_view_get_window_child (view, widget);
2581 }
2582
2583 static void
2584 annotation_window_closed (EvAnnotationWindow *window,
2585                           EvView             *view)
2586 {
2587         EvViewWindowChild *child;
2588
2589         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2590         child->visible = FALSE;
2591 }
2592
2593 static void
2594 annotation_window_moved (EvAnnotationWindow *window,
2595                          gint                x,
2596                          gint                y,
2597                          EvView             *view)
2598 {
2599         EvViewWindowChild *child;
2600         GdkRectangle       page_area;
2601         GtkBorder          border;
2602         GdkRectangle       view_rect;
2603         EvRectangle        doc_rect;
2604         gint               width, height;
2605
2606         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2607         if (child->x == x && child->y == y)
2608                 return;
2609
2610         child->moved = TRUE;
2611         child->x = x;
2612         child->y = y;
2613
2614         /* Window has been moved by the user,
2615          * we have to set a new origin in doc coords
2616          */
2617         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2618         view_rect.x = (x - child->parent_x) + view->scroll_x;
2619         view_rect.y = (y - child->parent_y) + view->scroll_y;
2620         view_rect.width = width;
2621         view_rect.height = height;
2622
2623         ev_view_get_page_extents (view, child->page, &page_area, &border);
2624         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2625         child->orig_x = doc_rect.x1;
2626         child->orig_y = doc_rect.y1;
2627 }
2628
2629 static void
2630 ev_view_annotation_save_contents (EvView       *view,
2631                                   GParamSpec   *pspec,
2632                                   EvAnnotation *annot)
2633 {
2634         if (!view->document)
2635                 return;
2636
2637         ev_document_doc_mutex_lock ();
2638         ev_document_annotations_save_annotation (EV_DOCUMENT_ANNOTATIONS (view->document),
2639                                                  annot, EV_ANNOTATIONS_SAVE_CONTENTS);
2640         ev_document_doc_mutex_unlock ();
2641 }
2642
2643 static GtkWidget *
2644 ev_view_create_annotation_window (EvView       *view,
2645                                   EvAnnotation *annot,
2646                                   GtkWindow    *parent)
2647 {
2648         GtkWidget   *window;
2649         EvRectangle  doc_rect;
2650         GdkRectangle view_rect;
2651         guint        page;
2652
2653         window = ev_annotation_window_new (annot, parent);
2654         g_signal_connect (window, "grab_focus",
2655                           G_CALLBACK (annotation_window_grab_focus),
2656                           view);
2657         g_signal_connect (window, "closed",
2658                           G_CALLBACK (annotation_window_closed),
2659                           view);
2660         g_signal_connect (window, "moved",
2661                           G_CALLBACK (annotation_window_moved),
2662                           view);
2663         g_signal_connect_swapped (annot, "notify::contents",
2664                                   G_CALLBACK (ev_view_annotation_save_contents),
2665                                   view);
2666         g_object_set_data (G_OBJECT (annot), "popup", window);
2667
2668         page = ev_annotation_get_page_index (annot);
2669         ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window), &doc_rect);
2670         doc_rect_to_view_rect (view, page, &doc_rect, &view_rect);
2671         view_rect.x -= view->scroll_x;
2672         view_rect.y -= view->scroll_y;
2673
2674         ev_view_window_child_put (view, window, page,
2675                                   view_rect.x, view_rect.y,
2676                                   doc_rect.x1, doc_rect.y1);
2677
2678         return window;
2679 }
2680
2681 static void
2682 show_annotation_windows (EvView *view,
2683                          gint    page)
2684 {
2685         EvMappingList *annots;
2686         GList         *l;
2687         GtkWindow     *parent;
2688
2689         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2690
2691         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2692
2693         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2694                 EvAnnotation      *annot;
2695                 EvViewWindowChild *child;
2696                 GtkWidget         *window;
2697
2698                 annot = ((EvMapping *)(l->data))->data;
2699
2700                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2701                         continue;
2702
2703                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2704                         continue;
2705
2706                 window = g_object_get_data (G_OBJECT (annot), "popup");
2707                 if (window) {
2708                         ev_view_window_child_move_with_parent (view, window);
2709                         continue;
2710                 }
2711
2712                 /* Look if we already have a popup for this annot */
2713                 child = ev_view_find_window_child_for_annot (view, page, annot);
2714                 window = child ? child->window : NULL;
2715                 if (window) {
2716                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2717                         g_object_set_data (G_OBJECT (annot), "popup", window);
2718                         ev_view_window_child_move_with_parent (view, window);
2719                 } else {
2720                         ev_view_create_annotation_window (view, annot, parent);
2721                 }
2722         }
2723 }
2724
2725 static void
2726 hide_annotation_windows (EvView *view,
2727                          gint    page)
2728 {
2729         EvMappingList *annots;
2730         GList         *l;
2731
2732         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2733
2734         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2735                 EvAnnotation *annot;
2736                 GtkWidget    *window;
2737
2738                 annot = ((EvMapping *)(l->data))->data;
2739
2740                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2741                         continue;
2742
2743                 window = g_object_get_data (G_OBJECT (annot), "popup");
2744                 if (window)
2745                         gtk_widget_hide (window);
2746         }
2747 }
2748
2749 static EvAnnotation *
2750 ev_view_get_annotation_at_location (EvView  *view,
2751                                     gdouble  x,
2752                                     gdouble  y)
2753 {
2754         gint page = -1;
2755         gint x_new = 0, y_new = 0;
2756         EvMappingList *annotations_mapping;
2757
2758         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2759                 return NULL;
2760
2761         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2762                 return NULL;
2763
2764         annotations_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
2765
2766         if (annotations_mapping)
2767                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2768         else
2769                 return NULL;
2770 }
2771
2772 static void
2773 ev_view_annotation_show_popup_window (EvView    *view,
2774                                       GtkWidget *window)
2775 {
2776         EvViewWindowChild *child;
2777
2778         if (!window)
2779                 return;
2780
2781         child = ev_view_get_window_child (view, window);
2782         if (!child->visible) {
2783                 child->visible = TRUE;
2784                 ev_view_window_child_move (view, child, child->x, child->y);
2785                 gtk_widget_show (window);
2786         }
2787 }
2788
2789 static void
2790 ev_view_handle_annotation (EvView       *view,
2791                            EvAnnotation *annot,
2792                            gdouble       x,
2793                            gdouble       y,
2794                            guint32       timestamp)
2795 {
2796         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2797                 GtkWidget *window;
2798
2799                 window = g_object_get_data (G_OBJECT (annot), "popup");
2800                 ev_view_annotation_show_popup_window (view, window);
2801         }
2802
2803         if (EV_IS_ANNOTATION_ATTACHMENT (annot)) {
2804                 EvAttachment *attachment;
2805
2806                 attachment = ev_annotation_attachment_get_attachment (EV_ANNOTATION_ATTACHMENT (annot));
2807                 if (attachment) {
2808                         GError *error = NULL;
2809
2810                         ev_attachment_open (attachment,
2811                                             gtk_widget_get_screen (GTK_WIDGET (view)),
2812                                             timestamp,
2813                                             &error);
2814
2815                         if (error) {
2816                                 g_warning ("%s", error->message);
2817                                 g_error_free (error);
2818                         }
2819                 }
2820         }
2821 }
2822
2823 static void
2824 ev_view_create_annotation (EvView          *view,
2825                            EvAnnotationType annot_type,
2826                            gint             x,
2827                            gint             y)
2828 {
2829         EvAnnotation   *annot;
2830         GdkPoint        point;
2831         GdkRectangle    page_area;
2832         GtkBorder       border;
2833         EvRectangle     doc_rect, popup_rect;
2834         EvPage         *page;
2835         GdkColor        color = { 0, 65535, 65535, 0 };
2836         GdkRectangle    view_rect;
2837         cairo_region_t *region;
2838
2839         point.x = x;
2840         point.y = y;
2841         ev_view_get_page_extents (view, view->current_page, &page_area, &border);
2842         view_point_to_doc_point (view, &point, &page_area,
2843                                  &doc_rect.x1, &doc_rect.y1);
2844         doc_rect.x2 = doc_rect.x1 + 24;
2845         doc_rect.y2 = doc_rect.y1 + 24;
2846
2847         ev_document_doc_mutex_lock ();
2848         page = ev_document_get_page (view->document, view->current_page);
2849         switch (annot_type) {
2850         case EV_ANNOTATION_TYPE_TEXT:
2851                 annot = ev_annotation_text_new (page);
2852                 break;
2853         case EV_ANNOTATION_TYPE_ATTACHMENT:
2854                 /* TODO */
2855                 g_object_unref (page);
2856                 ev_document_doc_mutex_unlock ();
2857                 return;
2858         default:
2859                 g_assert_not_reached ();
2860         }
2861         g_object_unref (page);
2862
2863         ev_annotation_set_color (annot, &color);
2864
2865         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2866                 popup_rect.x1 = doc_rect.x2;
2867                 popup_rect.x2 = popup_rect.x1 + 200;
2868                 popup_rect.y1 = doc_rect.y2;
2869                 popup_rect.y2 = popup_rect.y1 + 150;
2870                 g_object_set (annot,
2871                               "rectangle", &popup_rect,
2872                               "has_popup", TRUE,
2873                               "popup_is_open", FALSE,
2874                               "label", g_get_real_name (),
2875                               "opacity", 1.0,
2876                               NULL);
2877         }
2878         ev_document_annotations_add_annotation (EV_DOCUMENT_ANNOTATIONS (view->document),
2879                                                 annot, &doc_rect);
2880         ev_document_doc_mutex_unlock ();
2881
2882         /* If the page didn't have annots, mark the cache as dirty */
2883         if (!ev_page_cache_get_annot_mapping (view->page_cache, view->current_page))
2884                 ev_page_cache_mark_dirty (view->page_cache, view->current_page);
2885
2886         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2887                 GtkWindow *parent;
2888                 GtkWidget *window;
2889
2890                 parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2891                 window = ev_view_create_annotation_window (view, annot, parent);
2892
2893                 /* Show the annot window the first time */
2894                 ev_view_annotation_show_popup_window (view, window);
2895         }
2896
2897         doc_rect_to_view_rect (view, view->current_page, &doc_rect, &view_rect);
2898         view_rect.x -= view->scroll_x;
2899         view_rect.y -= view->scroll_y;
2900         region = cairo_region_create_rectangle (&view_rect);
2901         ev_view_reload_page (view, view->current_page, region);
2902         cairo_region_destroy (region);
2903
2904         g_signal_emit (view, signals[SIGNAL_ANNOT_ADDED], 0, annot);
2905 }
2906
2907 void
2908 ev_view_focus_annotation (EvView    *view,
2909                           EvMapping *annot_mapping)
2910 {
2911         GdkRectangle  view_rect;
2912         EvAnnotation *annot;
2913         guint         page;
2914
2915         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2916                 return;
2917
2918         if (view->focus_annotation == annot_mapping)
2919                 return;
2920
2921         view->focus_annotation = annot_mapping;
2922         annot = (EvAnnotation *)annot_mapping->data;
2923
2924         page = ev_annotation_get_page_index (annot);
2925         ev_document_model_set_page (view->model, page);
2926
2927         doc_rect_to_view_rect (view, page,
2928                                &annot_mapping->area, &view_rect);
2929         ensure_rectangle_is_visible (view, &view_rect);
2930         gtk_widget_queue_draw (GTK_WIDGET (view));
2931 }
2932
2933 void
2934 ev_view_begin_add_annotation (EvView          *view,
2935                               EvAnnotationType annot_type)
2936 {
2937         if (annot_type == EV_ANNOTATION_TYPE_UNKNOWN)
2938                 return;
2939
2940         if (view->adding_annot)
2941                 return;
2942
2943         view->adding_annot = TRUE;
2944         view->adding_annot_type = annot_type;
2945         ev_view_set_cursor (view, EV_VIEW_CURSOR_ADD);
2946 }
2947
2948 void
2949 ev_view_cancel_add_annotation (EvView *view)
2950 {
2951         gint x, y;
2952
2953         if (!view->adding_annot)
2954                 return;
2955
2956         view->adding_annot = FALSE;
2957         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
2958         ev_view_handle_cursor_over_xy (view, x, y);
2959 }
2960
2961 static gboolean
2962 ev_view_synctex_backward_search (EvView *view,
2963                                  gdouble x,
2964                                  gdouble y)
2965 {
2966         gint page = -1;
2967         gint x_new = 0, y_new = 0;
2968         EvSourceLink *link;
2969
2970         if (!ev_document_has_synctex (view->document))
2971                 return FALSE;
2972
2973         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2974                 return FALSE;
2975
2976         link = ev_document_synctex_backward_search (view->document, page, x_new, y_new);
2977         if (link) {
2978                 g_signal_emit (view, signals[SIGNAL_SYNC_SOURCE], 0, link);
2979                 g_free (link);
2980
2981                 return TRUE;
2982         }
2983
2984         return FALSE;
2985 }
2986
2987 /*** GtkWidget implementation ***/
2988
2989 static void
2990 ev_view_size_request_continuous_dual_page (EvView         *view,
2991                                            GtkRequisition *requisition)
2992 {
2993         gint n_pages;
2994
2995         n_pages = ev_document_get_n_pages (view->document) + 1;
2996         get_page_y_offset (view, n_pages, &requisition->height);
2997
2998         switch (view->sizing_mode) {
2999                 case EV_SIZING_FIT_WIDTH:
3000                 case EV_SIZING_BEST_FIT:
3001                         requisition->width = 1;
3002
3003                         break;
3004                 case EV_SIZING_FREE: {
3005                         gint max_width;
3006                         GtkBorder border;
3007
3008                         ev_view_get_max_page_size (view, &max_width, NULL);
3009                         compute_border (view, max_width, max_width, &border);
3010                         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
3011                 }
3012                         break;
3013                 default:
3014                         g_assert_not_reached ();
3015         }
3016 }
3017
3018 static void
3019 ev_view_size_request_continuous (EvView         *view,
3020                                  GtkRequisition *requisition)
3021 {
3022         gint n_pages;
3023
3024         n_pages = ev_document_get_n_pages (view->document);
3025         get_page_y_offset (view, n_pages, &requisition->height);
3026
3027         switch (view->sizing_mode) {
3028                 case EV_SIZING_FIT_WIDTH:
3029                 case EV_SIZING_BEST_FIT:
3030                         requisition->width = 1;
3031
3032                         break;
3033                 case EV_SIZING_FREE: {
3034                         gint max_width;
3035                         GtkBorder border;
3036
3037                         ev_view_get_max_page_size (view, &max_width, NULL);
3038                         compute_border (view, max_width, max_width, &border);
3039                         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
3040                 }
3041                         break;
3042                 default:
3043                         g_assert_not_reached ();
3044         }
3045 }
3046
3047 static void
3048 ev_view_size_request_dual_page (EvView         *view,
3049                                 GtkRequisition *requisition)
3050 {
3051         GtkBorder border;
3052         gint width, height;
3053
3054         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
3055                 requisition->width = 1;
3056                 requisition->height = 1;
3057
3058                 return;
3059         }
3060
3061         /* Find the largest of the two. */
3062         ev_view_get_page_size (view,
3063                                view->current_page,
3064                                &width, &height);
3065         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
3066                 gint width_2, height_2;
3067                 ev_view_get_page_size (view,
3068                                        view->current_page + 1,
3069                                        &width_2, &height_2);
3070                 if (width_2 > width) {
3071                         width = width_2;
3072                         height = height_2;
3073                 }
3074         }
3075         compute_border (view, width, height, &border);
3076
3077         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
3078                 ((width + border.left + border.right) * 2) + (view->spacing * 3);
3079         requisition->height = (height + border.top + border.bottom) + (view->spacing * 2);
3080 }
3081
3082 static void
3083 ev_view_size_request_single_page (EvView         *view,
3084                                   GtkRequisition *requisition)
3085 {
3086         GtkBorder border;
3087         gint width, height;
3088
3089         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
3090                 requisition->width = 1;
3091                 requisition->height = 1;
3092
3093                 return;
3094         }
3095
3096         ev_view_get_page_size (view, view->current_page, &width, &height);
3097         compute_border (view, width, height, &border);
3098
3099         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
3100                 width + border.left + border.right + (2 * view->spacing);
3101         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
3102 }
3103
3104 static void
3105 ev_view_size_request (GtkWidget      *widget,
3106                       GtkRequisition *requisition)
3107 {
3108         EvView *view = EV_VIEW (widget);
3109
3110         if (view->document == NULL) {
3111                 view->requisition.width = 1;
3112                 view->requisition.height = 1;
3113
3114                 *requisition = view->requisition;
3115
3116                 return;
3117         }
3118
3119         /* Get zoom for size here when not called from
3120          * ev_view_size_allocate()
3121          */
3122         if (!view->internal_size_request &&
3123             (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3124              view->sizing_mode == EV_SIZING_BEST_FIT)) {
3125                 GtkAllocation allocation;
3126
3127                 gtk_widget_get_allocation (widget, &allocation);
3128                 ev_view_zoom_for_size (view,
3129                                        allocation.width,
3130                                        allocation.height);
3131         }
3132
3133         if (view->continuous && view->dual_page)
3134                 ev_view_size_request_continuous_dual_page (view, &view->requisition);
3135         else if (view->continuous)
3136                 ev_view_size_request_continuous (view, &view->requisition);
3137         else if (view->dual_page)
3138                 ev_view_size_request_dual_page (view, &view->requisition);
3139         else
3140                 ev_view_size_request_single_page (view, &view->requisition);
3141
3142         *requisition = view->requisition;
3143 }
3144
3145 static void
3146 ev_view_size_allocate (GtkWidget      *widget,
3147                        GtkAllocation  *allocation)
3148 {
3149         EvView *view = EV_VIEW (widget);
3150         GList  *children, *l;
3151         gint    root_x, root_y;
3152
3153         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
3154
3155         if (!view->document)
3156                 return;
3157
3158         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3159             view->sizing_mode == EV_SIZING_BEST_FIT) {
3160                 GtkRequisition req;
3161
3162                 ev_view_zoom_for_size (view,
3163                                        allocation->width,
3164                                        allocation->height);
3165                 view->internal_size_request = TRUE;
3166                 ev_view_size_request (widget, &req);
3167                 view->internal_size_request = FALSE;
3168         }
3169
3170         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
3171         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
3172
3173         if (view->document)
3174                 view_update_range_and_current_page (view);
3175
3176         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
3177         view->pending_resize = FALSE;
3178         view->pending_point.x = 0;
3179         view->pending_point.y = 0;
3180
3181         children = gtk_container_get_children (GTK_CONTAINER (widget));
3182         for (l = children; l && l->data; l = g_list_next (l)) {
3183                 EvFormField   *field;
3184                 GdkRectangle   view_area;
3185                 EvMappingList *form_field_mapping;
3186                 GtkAllocation  child_allocation;
3187                 GtkRequisition child_requisition;
3188                 GtkWidget     *child = (GtkWidget *)l->data;
3189
3190                 field = g_object_get_data (G_OBJECT (child), "form-field");
3191                 if (!field)
3192                         continue;
3193
3194                 form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
3195                                                                            field->page->index);
3196                 ev_view_get_area_from_mapping (view, field->page->index,
3197                                                form_field_mapping,
3198                                                field, &view_area);
3199
3200                 gtk_widget_size_request (child, &child_requisition);
3201                 if (child_requisition.width != view_area.width ||
3202                     child_requisition.height != view_area.height)
3203                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
3204
3205                 gtk_container_child_get (GTK_CONTAINER (widget),
3206                                          child,
3207                                          "x", &child_allocation.x,
3208                                          "y", &child_allocation.y,
3209                                          NULL);
3210                 if (child_allocation.x != view_area.x ||
3211                     child_allocation.y != view_area.y) {
3212                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
3213                 }
3214         }
3215         g_list_free (children);
3216
3217         if (view->window_children)
3218                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
3219                                        &root_x, &root_y);
3220
3221         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
3222                 EvViewWindowChild *child;
3223                 EvRectangle        doc_rect;
3224                 GdkRectangle       view_rect;
3225
3226                 child = (EvViewWindowChild *)l->data;
3227
3228                 ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window), &doc_rect);
3229                 if (child->moved) {
3230                         doc_rect.x1 = child->orig_x;
3231                         doc_rect.y1 = child->orig_y;
3232                 }
3233                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
3234                 view_rect.x -= view->scroll_x;
3235                 view_rect.y -= view->scroll_y;
3236
3237                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
3238                         child->parent_x = root_x;
3239                         child->parent_y = root_y;
3240                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
3241                 }
3242         }
3243 }
3244
3245 static void
3246 ev_view_realize (GtkWidget *widget)
3247 {
3248         EvView    *view = EV_VIEW (widget);
3249         GdkWindow *bin_window;
3250         GtkStyle  *style;
3251
3252         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
3253                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
3254
3255         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3256         gdk_window_set_events (bin_window,
3257                                (gdk_window_get_events (bin_window) |
3258                                 GDK_EXPOSURE_MASK |
3259                                 GDK_BUTTON_PRESS_MASK |
3260                                 GDK_BUTTON_RELEASE_MASK |
3261                                 GDK_SCROLL_MASK |
3262                                 GDK_KEY_PRESS_MASK |
3263                                 GDK_POINTER_MOTION_MASK |
3264                                 GDK_POINTER_MOTION_HINT_MASK |
3265                                 GDK_ENTER_NOTIFY_MASK |
3266                                 GDK_LEAVE_NOTIFY_MASK));
3267
3268         style = gtk_widget_get_style (widget);
3269         gdk_window_set_background (bin_window, &style->mid[GTK_STATE_NORMAL]);
3270
3271         on_adjustment_value_changed (NULL, view);
3272 }
3273
3274 static gboolean
3275 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
3276 {
3277         EvView *view = EV_VIEW (widget);
3278         guint state;
3279
3280         state = event->state & gtk_accelerator_get_default_mod_mask ();
3281
3282         if (state == GDK_CONTROL_MASK) {
3283                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
3284                 if (event->direction == GDK_SCROLL_UP ||
3285                     event->direction == GDK_SCROLL_LEFT) {
3286                         if (ev_view_can_zoom_in (view)) {
3287                                 ev_view_zoom_in (view);
3288                         }
3289                 } else {
3290                         if (ev_view_can_zoom_out (view)) {
3291                                 ev_view_zoom_out (view);
3292                         }
3293                 }
3294
3295                 return TRUE;
3296         }
3297
3298         view->jump_to_find_result = FALSE;
3299
3300         /* Shift+Wheel scrolls the in the perpendicular direction */
3301         if (state & GDK_SHIFT_MASK) {
3302                 if (event->direction == GDK_SCROLL_UP)
3303                         event->direction = GDK_SCROLL_LEFT;
3304                 else if (event->direction == GDK_SCROLL_LEFT)
3305                         event->direction = GDK_SCROLL_UP;
3306                 else if (event->direction == GDK_SCROLL_DOWN)
3307                         event->direction = GDK_SCROLL_RIGHT;
3308                 else if (event->direction == GDK_SCROLL_RIGHT)
3309                         event->direction = GDK_SCROLL_DOWN;
3310
3311                 event->state &= ~GDK_SHIFT_MASK;
3312                 state &= ~GDK_SHIFT_MASK;
3313         }
3314
3315         if (state == 0 && view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous) {
3316                 switch (event->direction) {
3317                         case GDK_SCROLL_DOWN:
3318                         case GDK_SCROLL_RIGHT:
3319                                 ev_view_next_page (view);
3320                                 break;
3321                         case GDK_SCROLL_UP:
3322                         case GDK_SCROLL_LEFT:
3323                                 ev_view_previous_page (view);
3324                                 break;
3325                 }
3326
3327                 return TRUE;
3328         }
3329
3330         return FALSE;
3331 }
3332
3333 static EvViewSelection *
3334 find_selection_for_page (EvView *view,
3335                          gint    page)
3336 {
3337         GList *list;
3338
3339         for (list = view->selection_info.selections; list != NULL; list = list->next) {
3340                 EvViewSelection *selection;
3341
3342                 selection = (EvViewSelection *) list->data;
3343
3344                 if (selection->page == page)
3345                         return selection;
3346         }
3347
3348         return NULL;
3349 }
3350
3351 static gboolean
3352 ev_view_draw (GtkWidget *widget,
3353               cairo_t   *cr)
3354 {
3355         EvView      *view = EV_VIEW (widget);
3356         gint         i;
3357         GdkRectangle clip_rect;
3358
3359         if (view->loading) {
3360                 show_loading_window (view);
3361         } else if (view->loading_window &&
3362                    gtk_widget_get_visible (view->loading_window)) {
3363                 ev_view_loading_window_move (view);
3364         }
3365
3366         if (view->document == NULL)
3367                 return FALSE;
3368
3369         if (!gdk_cairo_get_clip_rectangle (cr, &clip_rect))
3370                 return FALSE;
3371
3372         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3373                 GdkRectangle page_area;
3374                 GtkBorder border;
3375                 gboolean page_ready = TRUE;
3376
3377                 if (!ev_view_get_page_extents (view, i, &page_area, &border))
3378                         continue;
3379
3380                 page_area.x -= view->scroll_x;
3381                 page_area.y -= view->scroll_y;
3382
3383                 draw_one_page (view, i, cr, &page_area, &border, &clip_rect, &page_ready);
3384
3385                 if (page_ready && view->find_pages && view->highlight_find_results)
3386                         highlight_find_results (view, cr, i);
3387                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3388                         show_annotation_windows (view, i);
3389                 if (page_ready && view->focus_annotation)
3390                         focus_annotation (view, cr, i, &clip_rect);
3391                 if (page_ready && view->synctex_result)
3392                         highlight_forward_search_results (view, cr, i);
3393         }
3394
3395         if (GTK_WIDGET_CLASS (ev_view_parent_class)->draw)
3396                 GTK_WIDGET_CLASS (ev_view_parent_class)->draw (widget, cr);
3397
3398         return FALSE;
3399 }
3400
3401 static gboolean
3402 ev_view_do_popup_menu (EvView *view,
3403                        gdouble x,
3404                        gdouble y)
3405 {
3406         GList        *items = NULL;
3407         EvLink       *link;
3408         EvImage      *image;
3409         EvAnnotation *annot;
3410
3411         image = ev_view_get_image_at_location (view, x, y);
3412         if (image)
3413                 items = g_list_prepend (items, image);
3414
3415         link = ev_view_get_link_at_location (view, x, y);
3416         if (link)
3417                 items = g_list_prepend (items, link);
3418
3419         annot = ev_view_get_annotation_at_location (view, x, y);
3420         if (annot)
3421                 items = g_list_prepend (items, annot);
3422
3423         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, items);
3424
3425         g_list_free (items);
3426
3427         return TRUE;
3428 }
3429
3430 static gboolean
3431 ev_view_popup_menu (GtkWidget *widget)
3432 {
3433         gint x, y;
3434
3435         gtk_widget_get_pointer (widget, &x, &y);
3436         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3437 }
3438
3439 static void
3440 get_link_area (EvView       *view,
3441                gint          x,
3442                gint          y,
3443                EvLink       *link,
3444                GdkRectangle *area)
3445 {
3446         EvMappingList *link_mapping;
3447         gint           page;
3448         gint           x_offset = 0, y_offset = 0;
3449
3450         x += view->scroll_x;
3451         y += view->scroll_y;
3452
3453         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3454
3455         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
3456         ev_view_get_area_from_mapping (view, page,
3457                                        link_mapping,
3458                                        link, area);
3459 }
3460
3461 static void
3462 get_annot_area (EvView       *view,
3463                gint          x,
3464                gint          y,
3465                EvAnnotation *annot,
3466                GdkRectangle *area)
3467 {
3468         EvMappingList *annot_mapping;
3469         gint           page;
3470         gint           x_offset = 0, y_offset = 0;
3471
3472         x += view->scroll_x;
3473         y += view->scroll_y;
3474
3475         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3476
3477         annot_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
3478         ev_view_get_area_from_mapping (view, page,
3479                                        annot_mapping,
3480                                        annot, area);
3481 }
3482
3483 static gboolean
3484 ev_view_query_tooltip (GtkWidget  *widget,
3485                        gint        x,
3486                        gint        y,
3487                        gboolean    keyboard_tip,
3488                        GtkTooltip *tooltip)
3489 {
3490         EvView       *view = EV_VIEW (widget);
3491         EvLink       *link;
3492         EvAnnotation *annot;
3493         gchar        *text;
3494
3495         annot = ev_view_get_annotation_at_location (view, x, y);
3496         if (annot) {
3497                 const gchar *contents;
3498
3499                 if ((contents = ev_annotation_get_contents (annot))) {
3500                         GdkRectangle annot_area;
3501
3502                         get_annot_area (view, x, y, annot, &annot_area);
3503                         gtk_tooltip_set_text (tooltip, contents);
3504                         gtk_tooltip_set_tip_area (tooltip, &annot_area);
3505
3506                         return TRUE;
3507                 }
3508         }
3509
3510         link = ev_view_get_link_at_location (view, x, y);
3511         if (!link)
3512                 return FALSE;
3513
3514         text = tip_from_link (view, link);
3515         if (text && g_utf8_validate (text, -1, NULL)) {
3516                 GdkRectangle link_area;
3517
3518                 get_link_area (view, x, y, link, &link_area);
3519                 gtk_tooltip_set_text (tooltip, text);
3520                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3521                 g_free (text);
3522
3523                 return TRUE;
3524         }
3525         g_free (text);
3526
3527         return FALSE;
3528 }
3529
3530 static void
3531 start_selection_for_event (EvView         *view,
3532                            GdkEventButton *event)
3533 {
3534         clear_selection (view);
3535
3536         view->selection_info.start.x = event->x + view->scroll_x;
3537         view->selection_info.start.y = event->y + view->scroll_y;
3538
3539         switch (event->type) {
3540                 case GDK_2BUTTON_PRESS:
3541                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3542                         break;
3543                 case GDK_3BUTTON_PRESS:
3544                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3545                         break;
3546                 default:
3547                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3548                         return;
3549         }
3550
3551         /* In case of WORD or LINE, compute selections now */
3552         compute_selections (view,
3553                             view->selection_info.style,
3554                             &(view->selection_info.start),
3555                             &(view->selection_info.start));
3556 }
3557
3558 static gboolean
3559 ev_view_button_press_event (GtkWidget      *widget,
3560                             GdkEventButton *event)
3561 {
3562         EvView *view = EV_VIEW (widget);
3563
3564         if (!view->document)
3565                 return FALSE;
3566
3567         if (!gtk_widget_has_focus (widget)) {
3568                 gtk_widget_grab_focus (widget);
3569         }
3570
3571         if (view->window_child_focus) {
3572                 EvAnnotationWindow *window;
3573                 EvAnnotation       *annot;
3574
3575                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3576                 annot = ev_annotation_window_get_annotation (window);
3577                 ev_annotation_window_ungrab_focus (window);
3578                 view->window_child_focus = NULL;
3579         }
3580
3581         view->pressed_button = event->button;
3582         view->selection_info.in_drag = FALSE;
3583
3584         if (view->adding_annot)
3585                 return FALSE;
3586
3587         if (view->scroll_info.autoscrolling)
3588                 return TRUE;
3589
3590         switch (event->button) {
3591                 case 1: {
3592                         EvImage *image;
3593                         EvAnnotation *annot;
3594                         EvFormField *field;
3595
3596                         if (event->state & GDK_CONTROL_MASK)
3597                                 return ev_view_synctex_backward_search (view, event->x , event->y);
3598
3599                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3600                                 if (event->type == GDK_3BUTTON_PRESS) {
3601                                         start_selection_for_event (view, event);
3602                                 } else if (location_in_selected_text (view,
3603                                                                event->x + view->scroll_x,
3604                                                                event->y + view->scroll_y)) {
3605                                         view->selection_info.in_drag = TRUE;
3606                                 } else {
3607                                         start_selection_for_event (view, event);
3608                                 }
3609
3610                                 gtk_widget_queue_draw (widget);
3611                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3612                                 ev_view_handle_annotation (view, annot, event->x, event->y, event->time);
3613                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3614                                 ev_view_remove_all (view);
3615                                 ev_view_handle_form_field (view, field, event->x, event->y);
3616                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3617                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3618                                 if (view->image_dnd_info.image)
3619                                         g_object_unref (view->image_dnd_info.image);
3620                                 view->image_dnd_info.image = g_object_ref (image);
3621                                 view->image_dnd_info.in_drag = TRUE;
3622
3623                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3624                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3625                         } else {
3626                                 ev_view_remove_all (view);
3627
3628                                 if (view->synctex_result) {
3629                                         g_free (view->synctex_result);
3630                                         view->synctex_result = NULL;
3631                                         gtk_widget_queue_draw (widget);
3632                                 }
3633
3634                                 if (view->focus_annotation)
3635                                         view->focus_annotation = NULL;
3636
3637                                 if (EV_IS_SELECTION (view->document))
3638                                         start_selection_for_event (view, event);
3639                         }
3640                 }
3641                         return TRUE;
3642                 case 2:
3643                         /* use root coordinates as reference point because
3644                          * scrolling changes window relative coordinates */
3645                         view->drag_info.start.x = event->x_root;
3646                         view->drag_info.start.y = event->y_root;
3647                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3648                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3649
3650                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3651
3652                         return TRUE;
3653                 case 3:
3654                         view->scroll_info.start_y = event->y;
3655                         return ev_view_do_popup_menu (view, event->x, event->y);
3656         }
3657
3658         return FALSE;
3659 }
3660
3661 static void
3662 ev_view_remove_all (EvView *view)
3663 {
3664         GList *children, *child;
3665
3666         children = gtk_container_get_children (GTK_CONTAINER (view));
3667         for (child = children; child && child->data; child = g_list_next (child)) {
3668                 gtk_container_remove (GTK_CONTAINER (view),
3669                                       GTK_WIDGET (child->data));
3670         }
3671         g_list_free (children);
3672 }
3673
3674 /*** Drag and Drop ***/
3675 static void
3676 ev_view_drag_data_get (GtkWidget        *widget,
3677                        GdkDragContext   *context,
3678                        GtkSelectionData *selection_data,
3679                        guint             info,
3680                        guint             time)
3681 {
3682         EvView *view = EV_VIEW (widget);
3683
3684         switch (info) {
3685                 case TARGET_DND_TEXT:
3686                         if (EV_IS_SELECTION (view->document) &&
3687                             view->selection_info.selections) {
3688                                 gchar *text;
3689
3690                                 text = get_selected_text (view);
3691                                 gtk_selection_data_set_text (selection_data,
3692                                                              text,
3693                                                              strlen (text));
3694                                 g_free (text);
3695                         }
3696                         break;
3697                 case TARGET_DND_IMAGE:
3698                         if (view->image_dnd_info.image) {
3699                                 GdkPixbuf *pixbuf;
3700
3701                                 ev_document_doc_mutex_lock ();
3702                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3703                                                                        view->image_dnd_info.image);
3704                                 ev_document_doc_mutex_unlock ();
3705
3706                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3707                                 g_object_unref (pixbuf);
3708                         }
3709                         break;
3710                 case TARGET_DND_URI:
3711                         if (view->image_dnd_info.image) {
3712                                 GdkPixbuf   *pixbuf;
3713                                 const gchar *tmp_uri;
3714                                 gchar       *uris[2];
3715
3716                                 ev_document_doc_mutex_lock ();
3717                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3718                                                                        view->image_dnd_info.image);
3719                                 ev_document_doc_mutex_unlock ();
3720
3721                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3722                                 g_object_unref (pixbuf);
3723
3724                                 uris[0] = (gchar *)tmp_uri;
3725                                 uris[1] = NULL;
3726                                 gtk_selection_data_set_uris (selection_data, uris);
3727                         }
3728         }
3729 }
3730
3731 static gboolean
3732 ev_view_drag_motion (GtkWidget      *widget,
3733                      GdkDragContext *context,
3734                      gint            x,
3735                      gint            y,
3736                      guint           time)
3737 {
3738         if (gtk_drag_get_source_widget (context) == widget)
3739                 gdk_drag_status (context, 0, time);
3740         else
3741                 gdk_drag_status (context, gdk_drag_context_get_suggested_action (context), time);
3742
3743         return TRUE;
3744 }
3745
3746 static gboolean
3747 selection_update_idle_cb (EvView *view)
3748 {
3749         compute_selections (view,
3750                             view->selection_info.style,
3751                             &view->selection_info.start,
3752                             &view->motion);
3753         view->selection_update_id = 0;
3754         return FALSE;
3755 }
3756
3757 static gboolean
3758 selection_scroll_timeout_cb (EvView *view)
3759 {
3760         gint x, y, shift = 0;
3761         GtkWidget *widget = GTK_WIDGET (view);
3762         GtkAllocation allocation;
3763
3764         gtk_widget_get_allocation (widget, &allocation);
3765         gtk_widget_get_pointer (widget, &x, &y);
3766
3767         if (y > allocation.height) {
3768                 shift = (y - allocation.height) / 2;
3769         } else if (y < 0) {
3770                 shift = y / 2;
3771         }
3772
3773         if (shift)
3774                 gtk_adjustment_set_value (view->vadjustment,
3775                                           CLAMP (gtk_adjustment_get_value (view->vadjustment) + shift,
3776                                                  gtk_adjustment_get_lower (view->vadjustment),
3777                                                  gtk_adjustment_get_upper (view->vadjustment) -
3778                                                  gtk_adjustment_get_page_size (view->vadjustment)));
3779
3780         if (x > allocation.width) {
3781                 shift = (x - allocation.width) / 2;
3782         } else if (x < 0) {
3783                 shift = x / 2;
3784         }
3785
3786         if (shift)
3787                 gtk_adjustment_set_value (view->hadjustment,
3788                                           CLAMP (gtk_adjustment_get_value (view->hadjustment) + shift,
3789                                                  gtk_adjustment_get_lower (view->hadjustment),
3790                                                  gtk_adjustment_get_upper (view->hadjustment) -
3791                                                  gtk_adjustment_get_page_size (view->hadjustment)));
3792
3793         return TRUE;
3794 }
3795
3796 static gboolean
3797 ev_view_drag_update_momentum (EvView *view)
3798 {
3799         int i;
3800         if (!view->drag_info.in_drag)
3801                 return FALSE;
3802
3803         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3804                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3805                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3806         }
3807
3808         /* Momentum is a moving average of 10ms granularity over
3809          * the last 100ms with each 10ms stored in buffer.
3810          */
3811
3812         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3813         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3814
3815         return TRUE;
3816 }
3817
3818 static gboolean
3819 ev_view_scroll_drag_release (EvView *view)
3820 {
3821         gdouble dhadj_value, dvadj_value;
3822         gdouble oldhadjustment, oldvadjustment;
3823         gdouble h_page_size, v_page_size;
3824         gdouble h_upper, v_upper;
3825         GtkAllocation allocation;
3826
3827         view->drag_info.momentum.x /= 1.2;
3828         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3829
3830         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
3831
3832         h_page_size = gtk_adjustment_get_page_size (view->hadjustment);
3833         v_page_size = gtk_adjustment_get_page_size (view->vadjustment);
3834
3835         dhadj_value = h_page_size *
3836                       (gdouble)view->drag_info.momentum.x / allocation.width;
3837         dvadj_value = v_page_size *
3838                       (gdouble)view->drag_info.momentum.y / allocation.height;
3839
3840         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3841         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3842
3843         h_upper = gtk_adjustment_get_upper (view->hadjustment);
3844         v_upper = gtk_adjustment_get_upper (view->vadjustment);
3845
3846         /* When we reach the edges, we need either to absorb some momentum and bounce by
3847          * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3848         if (((oldhadjustment + dhadj_value) > (h_upper - h_page_size)) ||
3849             ((oldhadjustment + dhadj_value) < 0))
3850                 view->drag_info.momentum.x = 0;
3851         if (((oldvadjustment + dvadj_value) > (v_upper - v_page_size)) ||
3852             ((oldvadjustment + dvadj_value) < 0))
3853                 view->drag_info.momentum.y = 0;
3854
3855         gtk_adjustment_set_value (view->hadjustment,
3856                                   MIN (oldhadjustment + dhadj_value,
3857                                        h_upper - h_page_size));
3858         gtk_adjustment_set_value (view->vadjustment,
3859                                   MIN (oldvadjustment + dvadj_value,
3860                                        v_upper - v_page_size));
3861
3862         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3863             ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3864                 return FALSE;
3865         else
3866                 return TRUE;
3867 }
3868
3869 static gboolean
3870 ev_view_motion_notify_event (GtkWidget      *widget,
3871                              GdkEventMotion *event)
3872 {
3873         EvView    *view = EV_VIEW (widget);
3874         GdkWindow *bin_window;
3875         gint       x, y;
3876
3877         if (!view->document)
3878                 return FALSE;
3879
3880         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3881
3882         if (event->is_hint || event->window != bin_window) {
3883             gtk_widget_get_pointer (widget, &x, &y);
3884         } else {
3885             x = event->x;
3886             y = event->y;
3887         }
3888
3889         if (view->scroll_info.autoscrolling) {
3890                 view->scroll_info.last_y = y;
3891                 return TRUE;
3892         }
3893
3894         if (view->selection_info.in_drag) {
3895                 if (gtk_drag_check_threshold (widget,
3896                                               view->selection_info.start.x,
3897                                               view->selection_info.start.y,
3898                                               x, y)) {
3899                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3900
3901                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3902
3903                         gtk_drag_begin (widget, target_list,
3904                                         GDK_ACTION_COPY,
3905                                         1, (GdkEvent *)event);
3906
3907                         view->selection_info.in_drag = FALSE;
3908
3909                         gtk_target_list_unref (target_list);
3910
3911                         return TRUE;
3912                 }
3913         } else if (view->image_dnd_info.in_drag) {
3914                 if (gtk_drag_check_threshold (widget,
3915                                               view->selection_info.start.x,
3916                                               view->selection_info.start.y,
3917                                               x, y)) {
3918                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3919
3920                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3921                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3922
3923                         gtk_drag_begin (widget, target_list,
3924                                         GDK_ACTION_COPY,
3925                                         1, (GdkEvent *)event);
3926
3927                         view->image_dnd_info.in_drag = FALSE;
3928
3929                         gtk_target_list_unref (target_list);
3930
3931                         return TRUE;
3932                 }
3933         }
3934
3935         switch (view->pressed_button) {
3936         case 1:
3937                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3938                  * documents only.
3939                  */
3940                 if (view->rotation != 0)
3941                         return FALSE;
3942
3943                 /* Schedule timeout to scroll during selection and additionally
3944                  * scroll once to allow arbitrary speed. */
3945                 if (!view->selection_scroll_id)
3946                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3947                                                                (GSourceFunc)selection_scroll_timeout_cb,
3948                                                                view);
3949                 else
3950                     selection_scroll_timeout_cb (view);
3951
3952                 view->selection_info.in_selection = TRUE;
3953                 view->motion.x = x + view->scroll_x;
3954                 view->motion.y = y + view->scroll_y;
3955
3956                 /* Queue an idle to handle the motion.  We do this because
3957                  * handling any selection events in the motion could be slower
3958                  * than new motion events reach us.  We always put it in the
3959                  * idle to make sure we catch up and don't visibly lag the
3960                  * mouse. */
3961                 if (!view->selection_update_id)
3962                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3963
3964                 return TRUE;
3965         case 2:
3966                 if (!view->drag_info.in_drag) {
3967                         gboolean start;
3968                         int i;
3969
3970                         start = gtk_drag_check_threshold (widget,
3971                                                           view->drag_info.start.x,
3972                                                           view->drag_info.start.y,
3973                                                           event->x_root,
3974                                                           event->y_root);
3975                         view->drag_info.in_drag = start;
3976                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3977                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3978                         /* Set 100 to choose how long it takes to build up momentum */
3979                         /* Clear out previous momentum info: */
3980                         for (i = 0; i < DRAG_HISTORY; i++) {
3981                                 view->drag_info.buffer[i].x = event->x;
3982                                 view->drag_info.buffer[i].y = event->y;
3983                         }
3984                         view->drag_info.momentum.x = 0;
3985                         view->drag_info.momentum.y = 0;
3986                 }
3987
3988                 if (view->drag_info.in_drag) {
3989                         int dx, dy;
3990                         gdouble dhadj_value, dvadj_value;
3991                         GtkAllocation allocation;
3992
3993                         view->drag_info.buffer[0].x = event->x;
3994                         view->drag_info.buffer[0].y = event->y;
3995
3996                         dx = event->x_root - view->drag_info.start.x;
3997                         dy = event->y_root - view->drag_info.start.y;
3998
3999                         gtk_widget_get_allocation (widget, &allocation);
4000
4001                         dhadj_value = gtk_adjustment_get_page_size (view->hadjustment) *
4002                                       (gdouble)dx / allocation.width;
4003                         dvadj_value = gtk_adjustment_get_page_size (view->vadjustment) *
4004                                       (gdouble)dy / allocation.height;
4005
4006                         /* clamp scrolling to visible area */
4007                         gtk_adjustment_set_value (view->hadjustment,
4008                                                   MIN (view->drag_info.hadj - dhadj_value,
4009                                                        gtk_adjustment_get_upper (view->hadjustment) -
4010                                                        gtk_adjustment_get_page_size (view->hadjustment)));
4011                         gtk_adjustment_set_value (view->vadjustment,
4012                                                   MIN (view->drag_info.vadj - dvadj_value,
4013                                                        gtk_adjustment_get_upper (view->vadjustment) -
4014                                                        gtk_adjustment_get_page_size (view->vadjustment)));
4015
4016                         return TRUE;
4017                 }
4018
4019                 break;
4020         default:
4021                 ev_view_handle_cursor_over_xy (view, x, y);
4022         }
4023
4024         return FALSE;
4025 }
4026
4027 static gboolean
4028 ev_view_button_release_event (GtkWidget      *widget,
4029                               GdkEventButton *event)
4030 {
4031         EvView *view = EV_VIEW (widget);
4032         EvLink *link = NULL;
4033
4034         view->image_dnd_info.in_drag = FALSE;
4035
4036         if (view->scroll_info.autoscrolling) {
4037                 ev_view_autoscroll_stop (view);
4038                 view->pressed_button = -1;
4039
4040                 return TRUE;
4041         }
4042
4043         if (view->pressed_button == 1 && event->state & GDK_CONTROL_MASK) {
4044                 view->pressed_button = -1;
4045                 return TRUE;
4046         }
4047
4048         if (view->drag_info.in_drag) {
4049                 view->drag_info.release_timeout_id =
4050                         g_timeout_add (20,
4051                                        (GSourceFunc)ev_view_scroll_drag_release, view);
4052         }
4053
4054         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
4055                 link = ev_view_get_link_at_location (view, event->x, event->y);
4056         }
4057
4058         view->drag_info.in_drag = FALSE;
4059
4060         if (view->adding_annot && view->pressed_button == 1) {
4061                 view->adding_annot = FALSE;
4062                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
4063                 view->pressed_button = -1;
4064
4065                 ev_view_create_annotation (view,
4066                                            view->adding_annot_type,
4067                                            event->x + view->scroll_x,
4068                                            event->y + view->scroll_y);
4069
4070                 return FALSE;
4071         }
4072
4073         if (view->pressed_button == 2) {
4074                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
4075         }
4076
4077         view->pressed_button = -1;
4078
4079         if (view->selection_scroll_id) {
4080             g_source_remove (view->selection_scroll_id);
4081             view->selection_scroll_id = 0;
4082         }
4083         if (view->selection_update_id) {
4084             g_source_remove (view->selection_update_id);
4085             view->selection_update_id = 0;
4086         }
4087
4088         if (view->selection_info.selections) {
4089                 clear_link_selected (view);
4090                 ev_view_update_primary_selection (view);
4091
4092                 if (view->selection_info.in_drag) {
4093                         clear_selection (view);
4094                         gtk_widget_queue_draw (widget);
4095                 }
4096
4097                 view->selection_info.in_drag = FALSE;
4098         } else if (link) {
4099                 if (event->button == 2) {
4100                         EvLinkAction    *action;
4101                         EvLinkActionType type;
4102
4103                         action = ev_link_get_action (link);
4104                         if (!action)
4105                                 return FALSE;
4106
4107                         type = ev_link_action_get_action_type (action);
4108                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
4109                                 g_signal_emit (view,
4110                                                signals[SIGNAL_EXTERNAL_LINK],
4111                                                0, action);
4112                         }
4113                 } else {
4114                         ev_view_handle_link (view, link);
4115                 }
4116         }
4117
4118         return FALSE;
4119 }
4120
4121 static gboolean
4122 ev_view_key_press_event (GtkWidget   *widget,
4123                          GdkEventKey *event)
4124 {
4125         EvView *view = EV_VIEW (widget);
4126
4127         if (!view->document)
4128                 return FALSE;
4129
4130         if (!gtk_widget_has_focus (widget)) {
4131                 /* Forward key events to current focused window child */
4132                 if (view->window_child_focus) {
4133                         GdkEventKey *new_event;
4134                         gboolean     handled;
4135
4136                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
4137                         g_object_unref (new_event->window);
4138                         new_event->window = gtk_widget_get_window (view->window_child_focus->window);
4139                         if (new_event->window)
4140                                 g_object_ref (new_event->window);
4141                         gtk_widget_realize (view->window_child_focus->window);
4142                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
4143                         gdk_event_free ((GdkEvent *)new_event);
4144
4145                         return handled;
4146                 }
4147
4148                 return FALSE;
4149         }
4150
4151         return gtk_bindings_activate_event (G_OBJECT (widget), event);
4152 }
4153
4154 static gint
4155 ev_view_focus_in (GtkWidget     *widget,
4156                   GdkEventFocus *event)
4157 {
4158         if (EV_VIEW (widget)->pixbuf_cache)
4159                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4160         gtk_widget_queue_draw (widget);
4161
4162         return FALSE;
4163 }
4164
4165 static gint
4166 ev_view_focus_out (GtkWidget     *widget,
4167                    GdkEventFocus *event)
4168 {
4169         if (EV_VIEW (widget)->pixbuf_cache)
4170                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4171         gtk_widget_queue_draw (widget);
4172
4173         return FALSE;
4174 }
4175
4176 static gboolean
4177 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4178 {
4179         EvView *view = EV_VIEW (widget);
4180
4181         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4182                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4183
4184         return FALSE;
4185 }
4186
4187 static gboolean
4188 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4189 {
4190         EvView *view = EV_VIEW (widget);
4191
4192         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4193
4194         return FALSE;
4195 }
4196
4197 static void
4198 ev_view_style_set (GtkWidget *widget,
4199                    GtkStyle  *old_style)
4200 {
4201         if (EV_VIEW (widget)->pixbuf_cache)
4202                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4203
4204         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
4205 }
4206
4207 /*** Drawing ***/
4208
4209 static void
4210 draw_rubberband (EvView             *view,
4211                  cairo_t            *cr,
4212                  const GdkRectangle *rect,
4213                  gdouble             alpha)
4214 {
4215         GtkStyle *style;
4216         const GdkColor *fill_color_gdk;
4217         gdouble   r, g, b;
4218
4219         style = gtk_widget_get_style (GTK_WIDGET (view));
4220         fill_color_gdk = &style->base[GTK_STATE_SELECTED];
4221         r = fill_color_gdk->red / 65535.;
4222         g = fill_color_gdk->green / 65535.;
4223         b = fill_color_gdk->blue / 65535.;
4224
4225         cairo_save (cr);
4226
4227         cairo_set_source_rgba (cr, r, g, b, alpha);
4228         cairo_rectangle (cr,
4229                          rect->x - view->scroll_x,
4230                          rect->y - view->scroll_y,
4231                          rect->width, rect->height);
4232         cairo_fill_preserve (cr);
4233
4234         cairo_set_line_width (cr, 0.5);
4235         cairo_set_source_rgb (cr, r, g, b);
4236         cairo_stroke (cr);
4237
4238         cairo_restore (cr);
4239 }
4240
4241
4242 static void
4243 highlight_find_results (EvView *view,
4244                         cairo_t *cr,
4245                         int page)
4246 {
4247         gint       i, n_results = 0;
4248         n_results = ev_view_find_get_n_results (view, page);
4249
4250         for (i = 0; i < n_results; i++) {
4251                 EvRectangle *rectangle;
4252                 GdkRectangle view_rectangle;
4253                 gdouble      alpha;
4254
4255                 if (i == view->find_result && page == view->current_page) {
4256                         alpha = 0.6;
4257                 } else {
4258                         alpha = 0.3;
4259                 }
4260
4261                 rectangle = ev_view_find_get_result (view, page, i);
4262                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4263                 draw_rubberband (view, cr, &view_rectangle, alpha);
4264         }
4265 }
4266
4267 static void
4268 highlight_forward_search_results (EvView *view,
4269                                   cairo_t *cr,
4270                                   int page)
4271 {
4272         GdkRectangle rect;
4273         EvMapping   *mapping = view->synctex_result;
4274
4275         if (GPOINTER_TO_INT (mapping->data) != page)
4276                 return;
4277
4278         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4279
4280         cairo_save (cr);
4281         cairo_set_source_rgb (cr, 1., 0., 0.);
4282         cairo_rectangle (cr,
4283                          rect.x - view->scroll_x,
4284                          rect.y - view->scroll_y,
4285                          rect.width, rect.height);
4286         cairo_stroke (cr);
4287         cairo_restore (cr);
4288 }
4289
4290 static void
4291 focus_annotation (EvView       *view,
4292                   cairo_t      *cr,
4293                   gint          page,
4294                   GdkRectangle *clip)
4295 {
4296         GtkWidget    *widget = GTK_WIDGET (view);
4297         GdkRectangle  rect;
4298         EvMapping    *mapping = view->focus_annotation;
4299         EvAnnotation *annot = (EvAnnotation *)mapping->data;
4300
4301         if (ev_annotation_get_page_index (annot) != page)
4302                 return;
4303
4304         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4305
4306         gtk_paint_focus (gtk_widget_get_style (widget),
4307                          cr,
4308                          gtk_widget_get_state (widget),
4309                          widget, NULL,
4310                          rect.x - view->scroll_x,
4311                          rect.y - view->scroll_y,
4312                          rect.width + 1, rect.height + 1);
4313 }
4314
4315 static void
4316 ev_view_loading_window_move (EvView *view)
4317 {
4318         GtkWidget       *widget = GTK_WIDGET (view);
4319         EvLoadingWindow *window = EV_LOADING_WINDOW (view->loading_window);
4320         gint             root_x, root_y;
4321         gint             window_width;
4322         GtkAllocation    allocation;
4323
4324         gtk_widget_get_allocation (widget, &allocation);
4325         gdk_window_get_origin (gtk_widget_get_window (widget), &root_x, &root_y);
4326         ev_loading_window_get_size (window, &window_width, NULL);
4327
4328         root_x += allocation.width - window_width - 10;
4329         root_y += 10;
4330
4331         ev_loading_window_move (window, root_x, root_y);
4332 }
4333
4334 static gboolean
4335 show_loading_window_cb (EvView *view)
4336 {
4337         if (!view->loading_window) {
4338                 GtkWindow *parent;
4339                 GdkScreen *screen;
4340
4341                 parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
4342                 view->loading_window = ev_loading_window_new (parent);
4343
4344                 /* Show the window off screen to get a valid size asap */
4345                 screen = gtk_widget_get_screen (GTK_WIDGET (view));
4346                 gtk_window_move (GTK_WINDOW (view->loading_window),
4347                                  gdk_screen_get_width (screen) + 1,
4348                                  gdk_screen_get_height (screen) + 1);
4349                 gtk_widget_show (view->loading_window);
4350         }
4351
4352         ev_view_loading_window_move (view);
4353
4354         gtk_widget_show (view->loading_window);
4355
4356         view->loading_timeout = 0;
4357
4358         return FALSE;
4359 }
4360
4361 static void
4362 show_loading_window (EvView *view)
4363 {
4364         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4365                 ev_view_loading_window_move (view);
4366                 return;
4367         }
4368
4369         if (!view->loading_timeout) {
4370                 view->loading_timeout =
4371                         g_timeout_add_full (G_PRIORITY_LOW,
4372                                             0.5, (GSourceFunc)show_loading_window_cb,
4373                                             view, NULL);
4374         }
4375 }
4376
4377 static void
4378 hide_loading_window (EvView *view)
4379 {
4380         if (view->loading_timeout) {
4381                 g_source_remove (view->loading_timeout);
4382                 view->loading_timeout = 0;
4383         }
4384
4385         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4386                 gtk_widget_hide (view->loading_window);
4387         }
4388 }
4389
4390 static void
4391 draw_one_page (EvView       *view,
4392                gint          page,
4393                cairo_t      *cr,
4394                GdkRectangle *page_area,
4395                GtkBorder    *border,
4396                GdkRectangle *expose_area,
4397                gboolean     *page_ready)
4398 {
4399         GdkRectangle overlap;
4400         GdkRectangle real_page_area;
4401         gint         current_page;
4402         gboolean     inverted_colors;
4403
4404         g_assert (view->document);
4405
4406         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4407                 return;
4408
4409         /* Render the document itself */
4410         real_page_area = *page_area;
4411
4412         real_page_area.x += border->left;
4413         real_page_area.y += border->top;
4414         real_page_area.width -= (border->left + border->right);
4415         real_page_area.height -= (border->top + border->bottom);
4416         *page_ready = TRUE;
4417
4418         current_page = ev_document_model_get_page (view->model);
4419         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4420         ev_document_misc_paint_one_page (cr,
4421                                          GTK_WIDGET (view),
4422                                          page_area, border,
4423                                          page == current_page,
4424                                          inverted_colors);
4425
4426         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4427                 gint             width, height;
4428                 gint             page_width, page_height;
4429                 cairo_surface_t *page_surface = NULL;
4430                 gint             selection_width, selection_height;
4431                 cairo_surface_t *selection_surface = NULL;
4432
4433                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4434
4435                 if (!page_surface) {
4436                         if (page == current_page)
4437                                 show_loading_window (view);
4438
4439                         *page_ready = FALSE;
4440
4441                         return;
4442                 }
4443
4444                 if (page == current_page)
4445                         hide_loading_window (view);
4446
4447                 ev_view_get_page_size (view, page, &width, &height);
4448
4449                 page_width = cairo_image_surface_get_width (page_surface);
4450                 page_height = cairo_image_surface_get_height (page_surface);
4451
4452                 cairo_save (cr);
4453                 cairo_translate (cr, overlap.x, overlap.y);
4454
4455                 if (width != page_width || height != page_height) {
4456                         cairo_pattern_set_filter (cairo_get_source (cr),
4457                                                   CAIRO_FILTER_FAST);
4458                         cairo_scale (cr,
4459                                      (gdouble)width / page_width,
4460                                      (gdouble)height / page_height);
4461                 }
4462
4463                 cairo_surface_set_device_offset (page_surface,
4464                                                  overlap.x - real_page_area.x,
4465                                                  overlap.y - real_page_area.y);
4466                 cairo_set_source_surface (cr, page_surface, 0, 0);
4467                 cairo_paint (cr);
4468                 cairo_restore (cr);
4469
4470                 /* Get the selection pixbuf iff we have something to draw */
4471                 if (find_selection_for_page (view, page) &&
4472                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4473                         selection_surface =
4474                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4475                                                                        page,
4476                                                                        view->scale,
4477                                                                        NULL);
4478                 }
4479
4480                 if (!selection_surface) {
4481                         return;
4482                 }
4483
4484                 selection_width = cairo_image_surface_get_width (selection_surface);
4485                 selection_height = cairo_image_surface_get_height (selection_surface);
4486
4487                 cairo_save (cr);
4488                 cairo_translate (cr, overlap.x, overlap.y);
4489
4490                 if (width != selection_width || height != selection_height) {
4491                         cairo_pattern_set_filter (cairo_get_source (cr),
4492                                                   CAIRO_FILTER_FAST);
4493                         cairo_scale (cr,
4494                                      (gdouble)width / selection_width,
4495                                      (gdouble)height / selection_height);
4496                 }
4497
4498                 cairo_surface_set_device_offset (selection_surface,
4499                                                  overlap.x - real_page_area.x,
4500                                                  overlap.y - real_page_area.y);
4501
4502                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4503                 cairo_paint (cr);
4504                 cairo_restore (cr);
4505         }
4506 }
4507
4508 /*** GObject functions ***/
4509
4510 static void
4511 ev_view_finalize (GObject *object)
4512 {
4513         EvView *view = EV_VIEW (object);
4514
4515         clear_selection (view);
4516         clear_link_selected (view);
4517
4518         if (view->synctex_result) {
4519                 g_free (view->synctex_result);
4520                 view->synctex_result = NULL;
4521         }
4522
4523         if (view->image_dnd_info.image)
4524                 g_object_unref (view->image_dnd_info.image);
4525         view->image_dnd_info.image = NULL;
4526
4527         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4528 }
4529
4530 static void
4531 ev_view_dispose (GObject *object)
4532 {
4533         EvView *view = EV_VIEW (object);
4534
4535         if (view->model) {
4536                 g_object_unref (view->model);
4537                 view->model = NULL;
4538         }
4539
4540         if (view->pixbuf_cache) {
4541                 g_object_unref (view->pixbuf_cache);
4542                 view->pixbuf_cache = NULL;
4543         }
4544
4545         if (view->document) {
4546                 g_object_unref (view->document);
4547                 view->document = NULL;
4548         }
4549
4550         if (view->page_cache) {
4551                 g_object_unref (view->page_cache);
4552                 view->page_cache = NULL;
4553         }
4554
4555         ev_view_window_children_free (view);
4556
4557         if (view->selection_scroll_id) {
4558             g_source_remove (view->selection_scroll_id);
4559             view->selection_scroll_id = 0;
4560         }
4561
4562         if (view->selection_update_id) {
4563             g_source_remove (view->selection_update_id);
4564             view->selection_update_id = 0;
4565         }
4566
4567         if (view->scroll_info.timeout_id) {
4568             g_source_remove (view->scroll_info.timeout_id);
4569             view->scroll_info.timeout_id = 0;
4570         }
4571
4572         if (view->drag_info.drag_timeout_id) {
4573                 g_source_remove (view->drag_info.drag_timeout_id);
4574                 view->drag_info.drag_timeout_id = 0;
4575         }
4576
4577         if (view->drag_info.release_timeout_id) {
4578                 g_source_remove (view->drag_info.release_timeout_id);
4579                 view->drag_info.release_timeout_id = 0;
4580         }
4581
4582         if (view->loading_timeout) {
4583                 g_source_remove (view->loading_timeout);
4584                 view->loading_timeout = 0;
4585         }
4586
4587         gtk_scrollable_set_hadjustment (GTK_SCROLLABLE (view), NULL);
4588         gtk_scrollable_set_vadjustment (GTK_SCROLLABLE (view), NULL);
4589
4590         G_OBJECT_CLASS (ev_view_parent_class)->dispose (object);
4591 }
4592
4593 static AtkObject *
4594 ev_view_get_accessible (GtkWidget *widget)
4595 {
4596         static gboolean first_time = TRUE;
4597
4598         if (first_time) {
4599                 AtkObjectFactory *factory;
4600                 AtkRegistry *registry;
4601                 GType derived_type;
4602                 GType derived_atk_type;
4603
4604                 /*
4605                  * Figure out whether accessibility is enabled by looking at the
4606                  * type of the accessible object which would be created for
4607                  * the parent type of EvView.
4608                  */
4609                 derived_type = g_type_parent (EV_TYPE_VIEW);
4610
4611                 registry = atk_get_default_registry ();
4612                 factory = atk_registry_get_factory (registry,
4613                                                     derived_type);
4614                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4615                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE)) {
4616                         atk_registry_set_factory_type (registry,
4617                                                        EV_TYPE_VIEW,
4618                                                        ev_view_accessible_factory_get_type ());
4619                         EV_VIEW (widget)->a11y_enabled = TRUE;
4620                 }
4621                 first_time = FALSE;
4622         }
4623         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4624 }
4625
4626 static void
4627 ev_view_class_init (EvViewClass *class)
4628 {
4629         GObjectClass *object_class = G_OBJECT_CLASS (class);
4630         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4631         GtkBindingSet *binding_set;
4632
4633         object_class->dispose = ev_view_dispose;
4634         object_class->finalize = ev_view_finalize;
4635
4636         widget_class->draw = ev_view_draw;
4637         widget_class->button_press_event = ev_view_button_press_event;
4638         widget_class->motion_notify_event = ev_view_motion_notify_event;
4639         widget_class->button_release_event = ev_view_button_release_event;
4640         widget_class->key_press_event = ev_view_key_press_event;
4641         widget_class->focus_in_event = ev_view_focus_in;
4642         widget_class->focus_out_event = ev_view_focus_out;
4643         widget_class->get_accessible = ev_view_get_accessible;
4644         widget_class->size_request = ev_view_size_request;
4645         widget_class->size_allocate = ev_view_size_allocate;
4646         widget_class->realize = ev_view_realize;
4647         widget_class->scroll_event = ev_view_scroll_event;
4648         widget_class->enter_notify_event = ev_view_enter_notify_event;
4649         widget_class->leave_notify_event = ev_view_leave_notify_event;
4650         widget_class->style_set = ev_view_style_set;
4651         widget_class->drag_data_get = ev_view_drag_data_get;
4652         widget_class->drag_motion = ev_view_drag_motion;
4653         widget_class->popup_menu = ev_view_popup_menu;
4654         widget_class->query_tooltip = ev_view_query_tooltip;
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_KEY_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4727         add_scroll_binding_keypad (binding_set, GDK_KEY_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4728         add_scroll_binding_keypad (binding_set, GDK_KEY_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4729         add_scroll_binding_keypad (binding_set, GDK_KEY_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4730         add_scroll_binding_keypad (binding_set, GDK_KEY_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4731         add_scroll_binding_keypad (binding_set, GDK_KEY_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4732         add_scroll_binding_keypad (binding_set, GDK_KEY_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4733         add_scroll_binding_keypad (binding_set, GDK_KEY_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4734         gtk_binding_entry_add_signal (binding_set, GDK_KEY_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_KEY_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_KEY_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_KEY_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         g_signal_connect (view, "notify::hadjustment", G_CALLBACK (on_hadjustment_notify), NULL);
4772         g_signal_connect (view, "notify::vadjustment", G_CALLBACK (on_vadjustment_notify), NULL);
4773
4774         gtk_scrollable_set_hadjustment (GTK_SCROLLABLE (view), NULL);
4775         gtk_scrollable_set_vadjustment (GTK_SCROLLABLE (view), NULL);
4776 }
4777
4778 /*** Callbacks ***/
4779
4780 static void
4781 ev_view_change_page (EvView *view,
4782                      gint    new_page)
4783 {
4784         gint x, y;
4785
4786         view->current_page = new_page;
4787         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4788
4789         hide_loading_window (view);
4790
4791         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4792         ev_view_handle_cursor_over_xy (view, x, y);
4793
4794         gtk_widget_queue_resize (GTK_WIDGET (view));
4795 }
4796
4797 static void
4798 job_finished_cb (EvPixbufCache  *pixbuf_cache,
4799                  cairo_region_t *region,
4800                  EvView         *view)
4801 {
4802         if (region) {
4803                 GdkWindow *bin_window;
4804
4805                 bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4806                 gdk_window_invalidate_region (bin_window, region, TRUE);
4807         } else {
4808                 gtk_widget_queue_draw (GTK_WIDGET (view));
4809         }
4810 }
4811
4812 static void
4813 ev_view_page_changed_cb (EvDocumentModel *model,
4814                          gint             old_page,
4815                          gint             new_page,
4816                          EvView          *view)
4817 {
4818         if (!view->document)
4819                 return;
4820
4821         if (view->current_page != new_page) {
4822                 ev_view_change_page (view, new_page);
4823         } else {
4824                 gtk_widget_queue_draw (GTK_WIDGET (view));
4825         }
4826
4827         view->find_result = 0;
4828 }
4829
4830 static void
4831 on_adjustment_value_changed (GtkAdjustment *adjustment,
4832                              EvView        *view)
4833 {
4834         int dx = 0, dy = 0;
4835         gint x, y;
4836         gint value;
4837         GList *children, *l;
4838
4839         if (!gtk_widget_get_realized (GTK_WIDGET (view)))
4840                 return;
4841
4842         if (view->hadjustment) {
4843                 value = (gint) gtk_adjustment_get_value (view->hadjustment);
4844                 dx = view->scroll_x - value;
4845                 view->scroll_x = value;
4846         } else {
4847                 view->scroll_x = 0;
4848         }
4849
4850         if (view->vadjustment) {
4851                 value = (gint) gtk_adjustment_get_value (view->vadjustment);
4852                 dy = view->scroll_y - value;
4853                 view->scroll_y = value;
4854         } else {
4855                 view->scroll_y = 0;
4856         }
4857
4858         children = gtk_container_get_children (GTK_CONTAINER (view));
4859         for (l = children; l && l->data; l = g_list_next (l)) {
4860                 gint       child_x, child_y;
4861                 GtkWidget *child = (GtkWidget *)l->data;
4862
4863                 gtk_container_child_get (GTK_CONTAINER (view),
4864                                          child,
4865                                          "x", &child_x,
4866                                          "y", &child_y,
4867                                          NULL);
4868                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4869         }
4870         g_list_free (children);
4871
4872         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4873                 EvViewWindowChild *child;
4874
4875                 child = (EvViewWindowChild *)l->data;
4876
4877                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4878         }
4879
4880         if (view->pending_resize) {
4881                 gtk_widget_queue_draw (GTK_WIDGET (view));
4882         } else {
4883                 GdkWindow *bin_window;
4884
4885                 bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4886                 gdk_window_scroll (bin_window, dx, dy);
4887         }
4888
4889         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4890         ev_view_handle_cursor_over_xy (view, x, y);
4891
4892         if (view->document)
4893                 view_update_range_and_current_page (view);
4894 }
4895
4896 GtkWidget*
4897 ev_view_new (void)
4898 {
4899         GtkWidget *view;
4900
4901         view = g_object_new (EV_TYPE_VIEW, NULL);
4902
4903         return view;
4904 }
4905
4906 static void
4907 setup_caches (EvView *view)
4908 {
4909         gboolean inverted_colors;
4910
4911         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
4912         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->model, view->pixbuf_cache_size);
4913         view->page_cache = ev_page_cache_new (view->document);
4914         if (view->a11y_enabled) {
4915                 EvJobPageDataFlags flags = ev_page_cache_get_flags (view->page_cache);
4916
4917                 ev_page_cache_set_flags (view->page_cache,
4918                                          flags |
4919                                          EV_PAGE_DATA_INCLUDE_TEXT_LAYOUT |
4920                                          EV_PAGE_DATA_INCLUDE_TEXT);
4921         }
4922         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4923         ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
4924         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4925 }
4926
4927 static void
4928 clear_caches (EvView *view)
4929 {
4930         if (view->pixbuf_cache) {
4931                 g_object_unref (view->pixbuf_cache);
4932                 view->pixbuf_cache = NULL;
4933         }
4934
4935         if (view->page_cache) {
4936                 g_object_unref (view->page_cache);
4937                 view->page_cache = NULL;
4938         }
4939 }
4940
4941 /**
4942  * ev_view_set_page_cache_size:
4943  * @view:
4944  * @cache_size:
4945  *
4946  * Sets the maximum size in bytes that will be used to cache
4947  * rendered pages. Use 0 to disable caching rendered pages.
4948  *
4949  * Note that this limit doesn't affect the current visible page range,
4950  * which will always be rendered. In order to limit the total memory used
4951  * you have to use ev_document_model_set_max_scale() too.
4952  *
4953  */
4954 void
4955 ev_view_set_page_cache_size (EvView *view,
4956                              gsize   cache_size)
4957 {
4958         if (view->pixbuf_cache_size == cache_size)
4959                 return;
4960
4961         view->pixbuf_cache_size = cache_size;
4962         if (view->pixbuf_cache)
4963                 ev_pixbuf_cache_set_max_size (view->pixbuf_cache, cache_size);
4964 }
4965
4966 void
4967 ev_view_set_loading (EvView       *view,
4968                      gboolean      loading)
4969 {
4970         if (view->loading && !loading)
4971                 hide_loading_window (view);
4972         view->loading = loading;
4973         gtk_widget_queue_draw (GTK_WIDGET (view));
4974 }
4975
4976 static gboolean
4977 ev_view_autoscroll_cb (EvView *view)
4978 {
4979         gdouble speed, value;
4980
4981         /* If the user stops autoscrolling, autoscrolling will be
4982          * set to false but the timeout will continue; stop the timeout: */
4983         if (!view->scroll_info.autoscrolling) {
4984                 view->scroll_info.timeout_id = 0;
4985                 return FALSE;
4986         }
4987
4988         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4989                 (view->scroll_info.last_y < view->scroll_info.start_y))
4990                 return TRUE;
4991
4992         /* Replace 100 with your speed of choice: The lower the faster.
4993          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4994          *      based on the distance of the starting point from the mouse
4995          * (All also effected by the timeout interval of this callback) */
4996
4997         if (view->scroll_info.start_y > view->scroll_info.last_y)
4998                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
4999         else
5000                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
5001
5002         value = gtk_adjustment_get_value (view->vadjustment);
5003         value = CLAMP (value + speed, 0,
5004                        gtk_adjustment_get_upper (view->vadjustment) -
5005                        gtk_adjustment_get_page_size (view->vadjustment));
5006         gtk_adjustment_set_value (view->vadjustment, value);
5007
5008         return TRUE;
5009
5010 }
5011
5012 void
5013 ev_view_autoscroll_start (EvView *view)
5014 {
5015         gint x, y;
5016
5017         g_return_if_fail (EV_IS_VIEW (view));
5018
5019         if (view->scroll_info.autoscrolling)
5020                 return;
5021
5022         view->scroll_info.autoscrolling = TRUE;
5023         view->scroll_info.timeout_id =
5024                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5025                                view);
5026
5027         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5028         ev_view_handle_cursor_over_xy (view, x, y);
5029 }
5030
5031 void
5032 ev_view_autoscroll_stop (EvView *view)
5033 {
5034         gint x, y;
5035
5036         g_return_if_fail (EV_IS_VIEW (view));
5037
5038         if (!view->scroll_info.autoscrolling)
5039                 return;
5040
5041         view->scroll_info.autoscrolling = FALSE;
5042         if (view->scroll_info.timeout_id) {
5043                 g_source_remove (view->scroll_info.timeout_id);
5044                 view->scroll_info.timeout_id = 0;
5045         }
5046
5047         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5048         ev_view_handle_cursor_over_xy (view, x, y);
5049 }
5050
5051 static void
5052 ev_view_document_changed_cb (EvDocumentModel *model,
5053                              GParamSpec      *pspec,
5054                              EvView          *view)
5055 {
5056         EvDocument *document = ev_document_model_get_document (model);
5057
5058         if (document != view->document) {
5059                 gint current_page;
5060
5061                 clear_caches (view);
5062
5063                 if (view->document) {
5064                         g_object_unref (view->document);
5065                 }
5066
5067                 view->document = document;
5068                 view->find_result = 0;
5069
5070                 if (view->document) {
5071                         view->loading = FALSE;
5072                         g_object_ref (view->document);
5073                         setup_caches (view);
5074                 }
5075
5076                 current_page = ev_document_model_get_page (model);
5077                 if (view->current_page != current_page) {
5078                         ev_view_change_page (view, current_page);
5079                 } else {
5080                         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
5081                         gtk_widget_queue_resize (GTK_WIDGET (view));
5082                 }
5083         }
5084 }
5085
5086 static void
5087 ev_view_rotation_changed_cb (EvDocumentModel *model,
5088                              GParamSpec      *pspec,
5089                              EvView          *view)
5090 {
5091         gint rotation = ev_document_model_get_rotation (model);
5092
5093         view->rotation = rotation;
5094
5095         if (view->pixbuf_cache) {
5096                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5097                 if (!ev_document_is_page_size_uniform (view->document))
5098                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5099                 gtk_widget_queue_resize (GTK_WIDGET (view));
5100         }
5101
5102         ev_view_remove_all (view);
5103
5104         if (rotation != 0)
5105                 clear_selection (view);
5106 }
5107
5108 static void
5109 ev_view_inverted_colors_changed_cb (EvDocumentModel *model,
5110                                     GParamSpec      *pspec,
5111                                     EvView          *view)
5112 {
5113         if (view->pixbuf_cache) {
5114                 gboolean inverted_colors;
5115
5116                 inverted_colors = ev_document_model_get_inverted_colors (model);
5117                 ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
5118                 gtk_widget_queue_draw (GTK_WIDGET (view));
5119         }
5120 }
5121
5122 static void
5123 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
5124                                 GParamSpec      *pspec,
5125                                 EvView          *view)
5126 {
5127         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
5128
5129         view->sizing_mode = mode;
5130         if (mode != EV_SIZING_FREE)
5131                 gtk_widget_queue_resize (GTK_WIDGET (view));
5132 }
5133
5134 #define EPSILON 0.0000001
5135 static void
5136 ev_view_scale_changed_cb (EvDocumentModel *model,
5137                           GParamSpec      *pspec,
5138                           EvView          *view)
5139 {
5140         gdouble scale = ev_document_model_get_scale (model);
5141
5142         if (ABS (view->scale - scale) < EPSILON)
5143                 return;
5144
5145         view->scale = scale;
5146
5147         view->pending_resize = TRUE;
5148         if (view->sizing_mode == EV_SIZING_FREE)
5149                 gtk_widget_queue_resize (GTK_WIDGET (view));
5150 }
5151
5152 static void
5153 ev_view_continuous_changed_cb (EvDocumentModel *model,
5154                                GParamSpec      *pspec,
5155                                EvView          *view)
5156 {
5157         gboolean continuous = ev_document_model_get_continuous (model);
5158
5159         view->continuous = continuous;
5160         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5161         gtk_widget_queue_resize (GTK_WIDGET (view));
5162 }
5163
5164 static void
5165 ev_view_dual_page_changed_cb (EvDocumentModel *model,
5166                               GParamSpec      *pspec,
5167                               EvView          *view)
5168 {
5169         gboolean dual_page = ev_document_model_get_dual_page (model);
5170
5171         view->dual_page = dual_page;
5172         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5173         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5174          * preload_cache_size to be 2 if dual_page is set.
5175          */
5176         gtk_widget_queue_resize (GTK_WIDGET (view));
5177 }
5178
5179 static void
5180 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
5181                                GParamSpec      *pspec,
5182                                EvView          *view)
5183 {
5184         gboolean fullscreen = ev_document_model_get_fullscreen (model);
5185
5186         view->fullscreen = fullscreen;
5187         gtk_widget_queue_resize (GTK_WIDGET (view));
5188 }
5189
5190 void
5191 ev_view_set_model (EvView          *view,
5192                    EvDocumentModel *model)
5193 {
5194         g_return_if_fail (EV_IS_VIEW (view));
5195         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
5196
5197         if (model == view->model)
5198                 return;
5199
5200         if (view->model) {
5201                 g_signal_handlers_disconnect_by_func (view->model,
5202                                                       ev_view_document_changed_cb,
5203                                                       view);
5204                 g_signal_handlers_disconnect_by_func (view->model,
5205                                                       ev_view_page_changed_cb,
5206                                                       view);
5207                 g_object_unref (view->model);
5208         }
5209         view->model = g_object_ref (model);
5210
5211         /* Initialize view from model */
5212         view->rotation = ev_document_model_get_rotation (view->model);
5213         view->sizing_mode = ev_document_model_get_sizing_mode (view->model);
5214         view->scale = ev_document_model_get_scale (view->model);
5215         view->continuous = ev_document_model_get_continuous (view->model);
5216         view->dual_page = ev_document_model_get_dual_page (view->model);
5217         view->fullscreen = ev_document_model_get_fullscreen (view->model);
5218         ev_view_document_changed_cb (view->model, NULL, view);
5219
5220         g_signal_connect (view->model, "notify::document",
5221                           G_CALLBACK (ev_view_document_changed_cb),
5222                           view);
5223         g_signal_connect (view->model, "notify::rotation",
5224                           G_CALLBACK (ev_view_rotation_changed_cb),
5225                           view);
5226         g_signal_connect (view->model, "notify::inverted-colors",
5227                           G_CALLBACK (ev_view_inverted_colors_changed_cb),
5228                           view);
5229         g_signal_connect (view->model, "notify::sizing-mode",
5230                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
5231                           view);
5232         g_signal_connect (view->model, "notify::scale",
5233                           G_CALLBACK (ev_view_scale_changed_cb),
5234                           view);
5235         g_signal_connect (view->model, "notify::continuous",
5236                           G_CALLBACK (ev_view_continuous_changed_cb),
5237                           view);
5238         g_signal_connect (view->model, "notify::dual-page",
5239                           G_CALLBACK (ev_view_dual_page_changed_cb),
5240                           view);
5241         g_signal_connect (view->model, "notify::fullscreen",
5242                           G_CALLBACK (ev_view_fullscreen_changed_cb),
5243                           view);
5244         g_signal_connect (view->model, "page-changed",
5245                           G_CALLBACK (ev_view_page_changed_cb),
5246                           view);
5247 }
5248
5249 static void
5250 ev_view_reload_page (EvView         *view,
5251                      gint            page,
5252                      cairo_region_t *region)
5253 {
5254         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5255                                      region,
5256                                      page,
5257                                      view->rotation,
5258                                      view->scale);
5259 }
5260
5261 void
5262 ev_view_reload (EvView *view)
5263 {
5264         ev_pixbuf_cache_clear (view->pixbuf_cache);
5265         view_update_range_and_current_page (view);
5266 }
5267
5268 /*** Zoom and sizing mode ***/
5269
5270 gboolean
5271 ev_view_can_zoom_in (EvView *view)
5272 {
5273         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
5274 }
5275
5276 gboolean
5277 ev_view_can_zoom_out (EvView *view)
5278 {
5279         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
5280 }
5281
5282 void
5283 ev_view_zoom_in (EvView *view)
5284 {
5285         gdouble scale;
5286
5287         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5288
5289         view->pending_scroll = SCROLL_TO_CENTER;
5290         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
5291         ev_document_model_set_scale (view->model, scale);
5292 }
5293
5294 void
5295 ev_view_zoom_out (EvView *view)
5296 {
5297         gdouble scale;
5298
5299         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5300
5301         view->pending_scroll = SCROLL_TO_CENTER;
5302         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5303         ev_document_model_set_scale (view->model, scale);
5304 }
5305
5306 static double
5307 zoom_for_size_fit_width (gdouble doc_width,
5308                          gdouble doc_height,
5309                          int     target_width,
5310                          int     target_height)
5311 {
5312         return (double)target_width / doc_width;
5313 }
5314
5315 static double
5316 zoom_for_size_fit_height (gdouble doc_width,
5317                           gdouble doc_height,
5318                           int     target_width,
5319                           int     target_height)
5320 {
5321         return (double)target_height / doc_height;
5322 }
5323
5324 static double
5325 zoom_for_size_best_fit (gdouble doc_width,
5326                         gdouble doc_height,
5327                         int     target_width,
5328                         int     target_height)
5329 {
5330         double w_scale;
5331         double h_scale;
5332
5333         w_scale = (double)target_width / doc_width;
5334         h_scale = (double)target_height / doc_height;
5335
5336         return MIN (w_scale, h_scale);
5337 }
5338
5339 static void
5340 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5341                                                 int     width,
5342                                                 int     height)
5343 {
5344         gdouble doc_width, doc_height;
5345         GtkBorder border;
5346         gdouble scale;
5347         gint sb_size;
5348
5349         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5350         if (view->rotation == 90 || view->rotation == 270) {
5351                 gdouble tmp;
5352
5353                 tmp = doc_width;
5354                 doc_width = doc_height;
5355                 doc_height = tmp;
5356         }
5357
5358         compute_border (view, doc_width, doc_height, &border);
5359
5360         doc_width *= 2;
5361         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5362         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5363
5364         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5365
5366         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5367                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5368         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5369                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5370         else
5371                 g_assert_not_reached ();
5372
5373         ev_document_model_set_scale (view->model, scale);
5374 }
5375
5376 static void
5377 ev_view_zoom_for_size_continuous (EvView *view,
5378                                   int     width,
5379                                   int     height)
5380 {
5381         gdouble doc_width, doc_height;
5382         GtkBorder border;
5383         gdouble scale;
5384         gint sb_size;
5385
5386         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5387         if (view->rotation == 90 || view->rotation == 270) {
5388                 gdouble tmp;
5389
5390                 tmp = doc_width;
5391                 doc_width = doc_height;
5392                 doc_height = tmp;
5393         }
5394
5395         compute_border (view, doc_width, doc_height, &border);
5396
5397         width -= (border.left + border.right + 2 * view->spacing);
5398         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5399
5400         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5401
5402         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5403                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5404         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5405                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5406         else
5407                 g_assert_not_reached ();
5408
5409         ev_document_model_set_scale (view->model, scale);
5410 }
5411
5412 static void
5413 ev_view_zoom_for_size_dual_page (EvView *view,
5414                                  int     width,
5415                                  int     height)
5416 {
5417         GtkBorder border;
5418         gdouble doc_width, doc_height;
5419         gdouble scale;
5420         gint other_page;
5421
5422         other_page = view->current_page ^ 1;
5423
5424         /* Find the largest of the two. */
5425         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5426         if (other_page < ev_document_get_n_pages (view->document)) {
5427                 gdouble width_2, height_2;
5428
5429                 get_doc_page_size (view, other_page, &width_2, &height_2);
5430                 if (width_2 > doc_width)
5431                         doc_width = width_2;
5432                 if (height_2 > doc_height)
5433                         doc_height = height_2;
5434         }
5435         compute_border (view, width, height, &border);
5436
5437         doc_width = doc_width * 2;
5438         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5439         height -= (border.top + border.bottom + 2 * view->spacing);
5440
5441         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5442                 gint sb_size;
5443
5444                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5445                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5446         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5447                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5448         else
5449                 g_assert_not_reached ();
5450
5451         ev_document_model_set_scale (view->model, scale);
5452 }
5453
5454 static void
5455 ev_view_zoom_for_size_single_page (EvView *view,
5456                                    int     width,
5457                                    int     height)
5458 {
5459         gdouble doc_width, doc_height;
5460         GtkBorder border;
5461         gdouble scale;
5462
5463         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5464
5465         /* Get an approximate border */
5466         compute_border (view, width, height, &border);
5467
5468         width -= (border.left + border.right + 2 * view->spacing);
5469         height -= (border.top + border.bottom + 2 * view->spacing);
5470
5471         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5472                 gint sb_size;
5473
5474                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5475                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5476         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5477                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5478         else
5479                 g_assert_not_reached ();
5480
5481         ev_document_model_set_scale (view->model, scale);
5482 }
5483
5484 static void
5485 ev_view_zoom_for_size (EvView *view,
5486                        int     width,
5487                        int     height)
5488 {
5489         g_return_if_fail (EV_IS_VIEW (view));
5490         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5491                           view->sizing_mode == EV_SIZING_BEST_FIT);
5492         g_return_if_fail (width >= 0);
5493         g_return_if_fail (height >= 0);
5494
5495         if (view->document == NULL)
5496                 return;
5497
5498         if (view->continuous && view->dual_page)
5499                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5500         else if (view->continuous)
5501                 ev_view_zoom_for_size_continuous (view, width, height);
5502         else if (view->dual_page)
5503                 ev_view_zoom_for_size_dual_page (view, width, height);
5504         else
5505                 ev_view_zoom_for_size_single_page (view, width, height);
5506 }
5507
5508 /*** Find ***/
5509 static gint
5510 ev_view_find_get_n_results (EvView *view, gint page)
5511 {
5512         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5513 }
5514
5515 static EvRectangle *
5516 ev_view_find_get_result (EvView *view, gint page, gint result)
5517 {
5518         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5519 }
5520
5521 static void
5522 jump_to_find_result (EvView *view)
5523 {
5524         gint n_results;
5525         gint page = view->current_page;
5526
5527         n_results = ev_view_find_get_n_results (view, page);
5528
5529         if (n_results > 0 && view->find_result < n_results) {
5530                 EvRectangle *rect;
5531                 GdkRectangle view_rect;
5532
5533                 rect = ev_view_find_get_result (view, page, view->find_result);
5534                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5535                 ensure_rectangle_is_visible (view, &view_rect);
5536                 view->jump_to_find_result = FALSE;
5537         }
5538 }
5539
5540 /**
5541  * jump_to_find_page
5542  * @view: #EvView instance
5543  * @direction: Direction to look
5544  * @shift: Shift from current page
5545  *
5546  * Jumps to the first page that has occurences of searched word.
5547  * Uses a direction where to look and a shift from current page.
5548  *
5549  */
5550 static void
5551 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5552 {
5553         int n_pages, i;
5554
5555         n_pages = ev_document_get_n_pages (view->document);
5556
5557         for (i = 0; i < n_pages; i++) {
5558                 int page;
5559
5560                 if (direction == EV_VIEW_FIND_NEXT)
5561                         page = view->current_page + i;
5562                 else
5563                         page = view->current_page - i;
5564                 page += shift;
5565
5566                 if (page >= n_pages) {
5567                         page = page - n_pages;
5568                 } else if (page < 0)
5569                         page = page + n_pages;
5570
5571                 if (ev_view_find_get_n_results (view, page) > 0) {
5572                         ev_document_model_set_page (view->model, page);
5573                         break;
5574                 }
5575         }
5576 }
5577
5578 void
5579 ev_view_find_changed (EvView *view, GList **results, gint page)
5580 {
5581         view->find_pages = results;
5582
5583         if (view->jump_to_find_result == TRUE) {
5584                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5585                 jump_to_find_result (view);
5586         }
5587
5588         if (view->current_page == page)
5589                 gtk_widget_queue_draw (GTK_WIDGET (view));
5590 }
5591
5592 void
5593 ev_view_find_next (EvView *view)
5594 {
5595         gint n_results;
5596
5597         n_results = ev_view_find_get_n_results (view, view->current_page);
5598         view->find_result++;
5599
5600         if (view->find_result >= n_results) {
5601                 view->find_result = 0;
5602                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5603                 jump_to_find_result (view);
5604         } else {
5605                 jump_to_find_result (view);
5606                 gtk_widget_queue_draw (GTK_WIDGET (view));
5607         }
5608 }
5609
5610 void
5611 ev_view_find_previous (EvView *view)
5612 {
5613         view->find_result--;
5614
5615         if (view->find_result < 0) {
5616                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5617                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5618                 jump_to_find_result (view);
5619         } else {
5620                 jump_to_find_result (view);
5621                 gtk_widget_queue_draw (GTK_WIDGET (view));
5622         }
5623 }
5624
5625 void
5626 ev_view_find_search_changed (EvView *view)
5627 {
5628         /* search string has changed, focus on new search result */
5629         view->jump_to_find_result = TRUE;
5630         view->find_pages = NULL;
5631 }
5632
5633 void
5634 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5635 {
5636         view->highlight_find_results = value;
5637         gtk_widget_queue_draw (GTK_WIDGET (view));
5638 }
5639
5640 void
5641 ev_view_find_cancel (EvView *view)
5642 {
5643         view->find_pages = NULL;
5644 }
5645
5646 /*** Synctex ***/
5647 void
5648 ev_view_highlight_forward_search (EvView       *view,
5649                                   EvSourceLink *link)
5650 {
5651         EvMapping   *mapping;
5652         gint         page;
5653         GdkRectangle view_rect;
5654
5655         if (!ev_document_has_synctex (view->document))
5656                 return;
5657
5658         mapping = ev_document_synctex_forward_search (view->document, link);
5659         if (!mapping)
5660                 return;
5661
5662         if (view->synctex_result)
5663                 g_free (view->synctex_result);
5664         view->synctex_result = mapping;
5665
5666         page = GPOINTER_TO_INT (mapping->data);
5667         ev_document_model_set_page (view->model, page);
5668
5669         doc_rect_to_view_rect (view, page, &mapping->area, &view_rect);
5670         ensure_rectangle_is_visible (view, &view_rect);
5671         gtk_widget_queue_draw (GTK_WIDGET (view));
5672 }
5673
5674 /*** Selections ***/
5675
5676 /* compute_new_selection_rect/text calculates the area currently selected by
5677  * view_rect.  each handles a different mode;
5678  */
5679 static GList *
5680 compute_new_selection_rect (EvView       *view,
5681                             GdkPoint     *start,
5682                             GdkPoint     *stop)
5683 {
5684         GdkRectangle view_rect;
5685         int n_pages, i;
5686         GList *list = NULL;
5687
5688         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5689
5690         view_rect.x = MIN (start->x, stop->x);
5691         view_rect.y = MIN (start->y, stop->y);
5692         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5693         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5694
5695         n_pages = ev_document_get_n_pages (view->document);
5696
5697         for (i = 0; i < n_pages; i++) {
5698                 GdkRectangle page_area;
5699                 GtkBorder border;
5700
5701                 if (ev_view_get_page_extents (view, i, &page_area, &border)) {
5702                         GdkRectangle overlap;
5703
5704                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5705                                 EvViewSelection *selection;
5706
5707                                 selection = g_new0 (EvViewSelection, 1);
5708                                 selection->page = i;
5709                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5710                                                        &(selection->rect));
5711
5712                                 list = g_list_append (list, selection);
5713                         }
5714                 }
5715         }
5716
5717         return list;
5718 }
5719
5720 static gboolean
5721 gdk_rectangle_point_in (GdkRectangle *rectangle,
5722                         GdkPoint     *point)
5723 {
5724         return rectangle->x <= point->x &&
5725                 rectangle->y <= point->y &&
5726                 point->x < rectangle->x + rectangle->width &&
5727                 point->y < rectangle->y + rectangle->height;
5728 }
5729
5730 static GList *
5731 compute_new_selection_text (EvView          *view,
5732                             EvSelectionStyle style,
5733                             GdkPoint        *start,
5734                             GdkPoint        *stop)
5735 {
5736         int n_pages, i, first, last;
5737         GList *list = NULL;
5738         EvViewSelection *selection;
5739         gdouble width, height;
5740         int start_page, end_page;
5741
5742         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5743
5744         n_pages = ev_document_get_n_pages (view->document);
5745
5746         /* First figure out the range of pages the selection
5747          * affects. */
5748         first = n_pages;
5749         last = 0;
5750         if (view->continuous) {
5751                 start_page = 0;
5752                 end_page = n_pages;
5753         } else if (view->dual_page) {
5754                 start_page = view->start_page;
5755                 end_page = view->end_page + 1;
5756         } else {
5757                 start_page = view->current_page;
5758                 end_page = view->current_page + 1;
5759         }
5760
5761         for (i = start_page; i < end_page; i++) {
5762                 GdkRectangle page_area;
5763                 GtkBorder border;
5764
5765                 ev_view_get_page_extents (view, i, &page_area, &border);
5766                 if (gdk_rectangle_point_in (&page_area, start) ||
5767                     gdk_rectangle_point_in (&page_area, stop)) {
5768                         if (first == n_pages)
5769                                 first = i;
5770                         last = i;
5771                 }
5772
5773         }
5774
5775         /* Now create a list of EvViewSelection's for the affected
5776          * pages.  This could be an empty list, a list of just one
5777          * page or a number of pages.*/
5778         for (i = first; i < last + 1; i++) {
5779                 GdkRectangle page_area;
5780                 GtkBorder border;
5781                 GdkPoint *point;
5782
5783                 get_doc_page_size (view, i, &width, &height);
5784
5785                 selection = g_new0 (EvViewSelection, 1);
5786                 selection->page = i;
5787                 selection->style = style;
5788                 selection->rect.x1 = selection->rect.y1 = 0;
5789                 selection->rect.x2 = width;
5790                 selection->rect.y2 = height;
5791
5792                 ev_view_get_page_extents (view, i, &page_area, &border);
5793
5794                 if (gdk_rectangle_point_in (&page_area, start))
5795                         point = start;
5796                 else
5797                         point = stop;
5798
5799                 if (i == first)
5800                         view_point_to_doc_point (view, point, &page_area,
5801                                                  &selection->rect.x1,
5802                                                  &selection->rect.y1);
5803
5804                 /* If the selection is contained within just one page,
5805                  * make sure we don't write 'start' into both points
5806                  * in selection->rect. */
5807                 if (first == last)
5808                         point = stop;
5809
5810                 if (i == last)
5811                         view_point_to_doc_point (view, point, &page_area,
5812                                                  &selection->rect.x2,
5813                                                  &selection->rect.y2);
5814
5815                 list = g_list_append (list, selection);
5816         }
5817
5818         return list;
5819 }
5820
5821 /* This function takes the newly calculated list, and figures out which regions
5822  * have changed.  It then queues a redraw approporiately.
5823  */
5824 static void
5825 merge_selection_region (EvView *view,
5826                         GList  *new_list)
5827 {
5828         GList *old_list;
5829         GList *new_list_ptr, *old_list_ptr;
5830
5831         /* Update the selection */
5832         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5833         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5834         g_list_free (view->selection_info.selections);
5835         view->selection_info.selections = new_list;
5836         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5837         g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
5838
5839         new_list_ptr = new_list;
5840         old_list_ptr = old_list;
5841
5842         while (new_list_ptr || old_list_ptr) {
5843                 EvViewSelection *old_sel, *new_sel;
5844                 int cur_page;
5845                 cairo_region_t *region = NULL;
5846
5847                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5848                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5849
5850                 /* Assume that the lists are in order, and we run through them
5851                  * comparing them, one page at a time.  We come out with the
5852                  * first page we see. */
5853                 if (new_sel && old_sel) {
5854                         if (new_sel->page < old_sel->page) {
5855                                 new_list_ptr = new_list_ptr->next;
5856                                 old_sel = NULL;
5857                         } else if (new_sel->page > old_sel->page) {
5858                                 old_list_ptr = old_list_ptr->next;
5859                                 new_sel = NULL;
5860                         } else {
5861                                 new_list_ptr = new_list_ptr->next;
5862                                 old_list_ptr = old_list_ptr->next;
5863                         }
5864                 } else if (new_sel) {
5865                         new_list_ptr = new_list_ptr->next;
5866                 } else if (old_sel) {
5867                         old_list_ptr = old_list_ptr->next;
5868                 }
5869
5870                 g_assert (new_sel || old_sel);
5871
5872                 /* is the page we're looking at on the screen?*/
5873                 cur_page = new_sel ? new_sel->page : old_sel->page;
5874                 if (cur_page < view->start_page || cur_page > view->end_page)
5875                         continue;
5876
5877                 /* seed the cache with a new page.  We are going to need the new
5878                  * region too. */
5879                 if (new_sel) {
5880                         cairo_region_t *tmp_region = NULL;
5881
5882                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5883                                                                cur_page,
5884                                                                view->scale,
5885                                                                &tmp_region);
5886
5887                         if (tmp_region && !cairo_region_is_empty (tmp_region)) {
5888                                 new_sel->covered_region = cairo_region_reference (tmp_region);
5889                         }
5890                 }
5891
5892                 /* Now we figure out what needs redrawing */
5893                 if (old_sel && new_sel) {
5894                         if (old_sel->covered_region && new_sel->covered_region) {
5895                                 /* We only want to redraw the areas that have
5896                                  * changed, so we xor the old and new regions
5897                                  * and redraw if it's different */
5898                                 region = cairo_region_copy (old_sel->covered_region);
5899 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 9, 12)
5900                                 cairo_region_xor (region, new_sel->covered_region);
5901 #else
5902                                 cairo_region_t *tbr;
5903                                 tbr = cairo_region_copy (new_sel->covered_region);
5904
5905                                 /* xor old_sel, new_sel*/
5906                                 cairo_region_subtract (tbr, region);
5907                                 cairo_region_subtract (region, new_sel->covered_region);
5908                                 cairo_region_union (region, tbr);
5909                                 cairo_region_destroy (tbr);
5910 #endif
5911
5912                                 if (cairo_region_is_empty (region)) {
5913                                         cairo_region_destroy (region);
5914                                         region = NULL;
5915                                 } else {
5916                                         gint num_rectangles = cairo_region_num_rectangles (region);
5917                                         GdkRectangle r;
5918
5919                                         /* We need to make the damage region a little bigger
5920                                          * because the edges of the old selection might change
5921                                          */
5922                                         cairo_region_get_rectangle (region, 0, &r);
5923                                         r.x -= 5;
5924                                         r.width = 5;
5925                                         cairo_region_union_rectangle (region, &r);
5926
5927                                         cairo_region_get_rectangle (region, num_rectangles - 1, &r);
5928                                         r.x += r.width;
5929                                         r.width = 5;
5930                                         cairo_region_union_rectangle (region, &r);
5931                                 }
5932                         } else if (old_sel->covered_region) {
5933                                 region = cairo_region_copy (old_sel->covered_region);
5934                         } else if (new_sel->covered_region) {
5935                                 region = cairo_region_copy (new_sel->covered_region);
5936                         }
5937                 } else if (old_sel && !new_sel) {
5938                         if (old_sel->covered_region && !cairo_region_is_empty (old_sel->covered_region)) {
5939                                 region = cairo_region_copy (old_sel->covered_region);
5940                         }
5941                 } else if (!old_sel && new_sel) {
5942                         if (new_sel->covered_region && !cairo_region_is_empty (new_sel->covered_region)) {
5943                                 region = cairo_region_copy (new_sel->covered_region);
5944                         }
5945                 } else {
5946                         g_assert_not_reached ();
5947                 }
5948
5949                 /* Redraw the damaged region! */
5950                 if (region) {
5951                         GdkWindow   *bin_window;
5952                         GdkRectangle page_area;
5953                         GtkBorder    border;
5954
5955                         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
5956                         ev_view_get_page_extents (view, cur_page, &page_area, &border);
5957                         cairo_region_translate (region,
5958                                            page_area.x + border.left - view->scroll_x,
5959                                            page_area.y + border.top - view->scroll_y);
5960                         gdk_window_invalidate_region (bin_window, region, TRUE);
5961                         cairo_region_destroy (region);
5962                 }
5963         }
5964
5965         /* Free the old list, now that we're done with it. */
5966         g_list_foreach (old_list, (GFunc) selection_free, NULL);
5967         g_list_free (old_list);
5968 }
5969
5970 static void
5971 compute_selections (EvView          *view,
5972                     EvSelectionStyle style,
5973                     GdkPoint        *start,
5974                     GdkPoint        *stop)
5975 {
5976         GList *list;
5977
5978         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
5979                 list = compute_new_selection_rect (view, start, stop);
5980         else
5981                 list = compute_new_selection_text (view, style, start, stop);
5982         merge_selection_region (view, list);
5983 }
5984
5985 /* Free's the selection.  It's up to the caller to queue redraws if needed.
5986  */
5987 static void
5988 selection_free (EvViewSelection *selection)
5989 {
5990         if (selection->covered_region)
5991                 cairo_region_destroy (selection->covered_region);
5992         g_free (selection);
5993 }
5994
5995 static void
5996 clear_selection (EvView *view)
5997 {
5998         if (view->selection_info.selections) {
5999                 g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6000                 g_list_free (view->selection_info.selections);
6001                 view->selection_info.selections = NULL;
6002
6003                 g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
6004         }
6005         view->selection_info.in_selection = FALSE;
6006         if (view->pixbuf_cache)
6007                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6008 }
6009
6010 void
6011 ev_view_select_all (EvView *view)
6012 {
6013         GList *selections = NULL;
6014         int n_pages, i;
6015
6016         /* Disable selection on rotated pages for the 0.4.0 series */
6017         if (view->rotation != 0)
6018                 return;
6019
6020         clear_selection (view);
6021
6022         n_pages = ev_document_get_n_pages (view->document);
6023         for (i = 0; i < n_pages; i++) {
6024                 gdouble width, height;
6025                 EvViewSelection *selection;
6026
6027                 get_doc_page_size (view, i, &width, &height);
6028
6029                 selection = g_new0 (EvViewSelection, 1);
6030                 selection->page = i;
6031                 selection->style = EV_SELECTION_STYLE_GLYPH;
6032                 selection->rect.x1 = selection->rect.y1 = 0;
6033                 selection->rect.x2 = width;
6034                 selection->rect.y2 = height;
6035
6036                 selections = g_list_append (selections, selection);
6037         }
6038
6039         merge_selection_region (view, selections);
6040         gtk_widget_queue_draw (GTK_WIDGET (view));
6041 }
6042
6043 gboolean
6044 ev_view_get_has_selection (EvView *view)
6045 {
6046         return view->selection_info.selections != NULL;
6047 }
6048
6049 static char *
6050 get_selected_text (EvView *view)
6051 {
6052         GString *text;
6053         GList *l;
6054         gchar *normalized_text;
6055
6056         text = g_string_new (NULL);
6057
6058         ev_document_doc_mutex_lock ();
6059
6060         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6061                 EvViewSelection *selection = (EvViewSelection *)l->data;
6062                 EvPage *page;
6063                 gchar *tmp;
6064
6065                 page = ev_document_get_page (view->document, selection->page);
6066                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6067                                                       page, selection->style,
6068                                                       &(selection->rect));
6069                 g_object_unref (page);
6070                 g_string_append (text, tmp);
6071                 g_free (tmp);
6072         }
6073
6074         ev_document_doc_mutex_unlock ();
6075
6076         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6077         g_string_free (text, TRUE);
6078         return normalized_text;
6079 }
6080
6081 static void
6082 ev_view_clipboard_copy (EvView      *view,
6083                         const gchar *text)
6084 {
6085         GtkClipboard *clipboard;
6086
6087         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6088                                               GDK_SELECTION_CLIPBOARD);
6089         gtk_clipboard_set_text (clipboard, text, -1);
6090 }
6091
6092 void
6093 ev_view_copy (EvView *ev_view)
6094 {
6095         char *text;
6096
6097         if (!EV_IS_SELECTION (ev_view->document))
6098                 return;
6099
6100         text = get_selected_text (ev_view);
6101         ev_view_clipboard_copy (ev_view, text);
6102         g_free (text);
6103 }
6104
6105 static void
6106 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6107                         GtkSelectionData *selection_data,
6108                         guint             info,
6109                         gpointer          data)
6110 {
6111         EvView *ev_view = EV_VIEW (data);
6112
6113         if (ev_view->link_selected) {
6114                 gtk_selection_data_set_text (selection_data,
6115                                              ev_link_action_get_uri (ev_view->link_selected),
6116                                              -1);
6117         } else if (EV_IS_SELECTION (ev_view->document) &&
6118                    ev_view->selection_info.selections) {
6119                 gchar *text;
6120
6121                 text = get_selected_text (ev_view);
6122                 if (text) {
6123                         gtk_selection_data_set_text (selection_data, text, -1);
6124                         g_free (text);
6125                 }
6126         }
6127 }
6128
6129 static void
6130 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6131                           gpointer      data)
6132 {
6133         EvView *view = EV_VIEW (data);
6134
6135         clear_selection (view);
6136         clear_link_selected (view);
6137 }
6138
6139 static void
6140 ev_view_update_primary_selection (EvView *ev_view)
6141 {
6142         GtkClipboard *clipboard;
6143
6144         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6145                                               GDK_SELECTION_PRIMARY);
6146
6147         if (ev_view->selection_info.selections || ev_view->link_selected) {
6148                 GtkTargetList *target_list;
6149                 GtkTargetEntry *targets;
6150                 int n_targets;
6151
6152                 target_list = gtk_target_list_new (NULL, 0);
6153                 gtk_target_list_add_text_targets (target_list, 0);
6154                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6155                 gtk_target_list_unref (target_list);
6156
6157                 if (!gtk_clipboard_set_with_owner (clipboard,
6158                                                    targets, n_targets,
6159                                                    ev_view_primary_get_cb,
6160                                                    ev_view_primary_clear_cb,
6161                                                    G_OBJECT (ev_view)))
6162                         ev_view_primary_clear_cb (clipboard, ev_view);
6163
6164                 gtk_target_table_free (targets, n_targets);
6165         } else {
6166                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6167                         gtk_clipboard_clear (clipboard);
6168         }
6169 }
6170
6171 static void
6172 clear_link_selected (EvView *view)
6173 {
6174         if (view->link_selected) {
6175                 g_object_unref (view->link_selected);
6176                 view->link_selected = NULL;
6177         }
6178 }
6179
6180 void
6181 ev_view_copy_link_address (EvView       *view,
6182                            EvLinkAction *action)
6183 {
6184         clear_link_selected (view);
6185
6186         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6187
6188         view->link_selected = g_object_ref (action);
6189         ev_view_update_primary_selection (view);
6190 }
6191
6192 /*** Cursor operations ***/
6193 static void
6194 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6195 {
6196         GdkCursor *cursor = NULL;
6197         GtkWidget *widget;
6198         GdkWindow *bin_window;
6199
6200         if (view->cursor == new_cursor) {
6201                 return;
6202         }
6203
6204         view->cursor = new_cursor;
6205
6206         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
6207         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6208         cursor = ev_view_cursor_new (gtk_widget_get_display (widget), new_cursor);
6209         gdk_window_set_cursor (bin_window, cursor);
6210         gdk_flush ();
6211         if (cursor)
6212                 gdk_cursor_unref (cursor);
6213 }
6214
6215 void
6216 ev_view_hide_cursor (EvView *view)
6217 {
6218        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6219 }
6220
6221 void
6222 ev_view_show_cursor (EvView *view)
6223 {
6224        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6225 }
6226
6227 gboolean
6228 ev_view_next_page (EvView *view)
6229 {
6230         int page, n_pages;
6231
6232         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6233
6234         if (!view->document)
6235                 return FALSE;
6236
6237         page = ev_document_model_get_page (view->model);
6238         n_pages = ev_document_get_n_pages (view->document);
6239
6240         if (view->dual_page)
6241                 page = page + 2;
6242         else
6243                 page = page + 1;
6244
6245         if (page < n_pages) {
6246                 ev_document_model_set_page (view->model, page);
6247                 return TRUE;
6248         } else if (view->dual_page && page == n_pages) {
6249                 ev_document_model_set_page (view->model, page - 1);
6250                 return TRUE;
6251         } else {
6252                 return FALSE;
6253         }
6254 }
6255
6256 gboolean
6257 ev_view_previous_page (EvView *view)
6258 {
6259         int page;
6260
6261         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6262
6263         if (!view->document)
6264                 return FALSE;
6265
6266         page = ev_document_model_get_page (view->model);
6267
6268         if (view->dual_page)
6269                 page = page - 2;
6270         else
6271                 page = page - 1;
6272
6273         if (page >= 0) {
6274                 ev_document_model_set_page (view->model, page);
6275                 return TRUE;
6276         } else if (view->dual_page && page == -1) {
6277                 ev_document_model_set_page (view->model, 0);
6278                 return TRUE;
6279         } else {
6280                 return FALSE;
6281         }
6282 }
6283