libview/ev-view.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *  Copyright (C) 2004 Red Hat, Inc
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <math.h>
  25 #include <string.h>
  26
  27 #include <glib/gi18n-lib.h>
  28 #include <gtk/gtk.h>
  29 #include <gdk/gdkkeysyms.h>
  30
  31 #include "ev-mapping-list.h"
  32 #include "ev-document-forms.h"
  33 #include "ev-document-images.h"
  34 #include "ev-document-links.h"
  35 #include "ev-document-layers.h"
  36 #include "ev-document-misc.h"
  37 #include "ev-pixbuf-cache.h"
  38 #include "ev-page-cache.h"
  39 #include "ev-view-marshal.h"
  40 #include "ev-document-annotations.h"
  41 #include "ev-annotation-window.h"
  42 #include "ev-loading-window.h"
  43 #include "ev-view.h"
  44 #include "ev-view-accessible.h"
  45 #include "ev-view-private.h"
  46 #include "ev-view-type-builtins.h"
  47
  48 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  49 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  50 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  51
  52 enum {
  53         SIGNAL_BINDING_ACTIVATED,
  54         SIGNAL_HANDLE_LINK,
  55         SIGNAL_EXTERNAL_LINK,
  56         SIGNAL_POPUP_MENU,
  57         SIGNAL_SELECTION_CHANGED,
  58         SIGNAL_SYNC_SOURCE,
  59         SIGNAL_ANNOT_ADDED,
  60         SIGNAL_LAYERS_CHANGED,
  61         N_SIGNALS
  62 };
  63
  64 enum {
  65         TARGET_DND_URI,
  66         TARGET_DND_TEXT,
  67         TARGET_DND_IMAGE
  68 };
  69
  70 static guint signals[N_SIGNALS];
  71
  72 typedef enum {
  73         EV_VIEW_FIND_NEXT,
  74         EV_VIEW_FIND_PREV
  75 } EvViewFindDirection;
  76
  77 #define ZOOM_IN_FACTOR  1.2
  78 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  79
  80 #define SCROLL_TIME 150
  81
  82 /*** Scrolling ***/
  83 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  84                                                               GtkAdjustment      *hadjustment,
  85                                                               GtkAdjustment      *vadjustment);
  86 static void       view_update_range_and_current_page         (EvView             *view);
  87 static void       set_scroll_adjustment                      (EvView             *view,
  88                                                               GtkOrientation      orientation,
  89                                                               GtkAdjustment      *adjustment);
  90 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
  91                                                               guint               keyval,
  92                                                               GdkModifierType modifiers,
  93                                                               GtkScrollType       scroll,
  94                                                               gboolean            horizontal);
  95 static void       ensure_rectangle_is_visible                (EvView             *view,
  96                                                               GdkRectangle       *rect);
  97
  98 /*** Geometry computations ***/
  99 static void       compute_border                             (EvView             *view,
 100                                                               int                 width,
 101                                                               int                 height,
 102                                                               GtkBorder          *border);
 103 static void       get_page_y_offset                          (EvView             *view,
 104                                                               int                 page,
 105                                                               int                *y_offset);
 106 static void       view_rect_to_doc_rect                      (EvView             *view,
 107                                                               GdkRectangle       *view_rect,
 108                                                               GdkRectangle       *page_area,
 109                                                               EvRectangle        *doc_rect);
 110 static void       doc_rect_to_view_rect                      (EvView             *view,
 111                                                               int                 page,
 112                                                               EvRectangle        *doc_rect,
 113                                                               GdkRectangle       *view_rect);
 114 static gboolean   get_dual_even_left                         (EvView             *view);
 115 static void       find_page_at_location                      (EvView             *view,
 116                                                               gdouble             x,
 117                                                               gdouble             y,
 118                                                               gint               *page,
 119                                                               gint               *x_offset,
 120                                                               gint               *y_offset);
 121 static void       doc_point_to_view_point                    (EvView             *view,
 122                                                               int                 page,
 123                                                               EvPoint            *doc_point,
 124                                                               GdkPoint           *view_point);
 125 /*** Hyperrefs ***/
 126 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 127                                                               gdouble             x,
 128                                                               gdouble             y);
 129 static char*      tip_from_link                              (EvView             *view,
 130                                                               EvLink             *link);
 131 /*** Forms ***/
 132 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 133                                                                gdouble            x,
 134                                                                gdouble            y);
 135
 136 /*** Annotations ***/
 137 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 138                                                               gdouble             x,
 139                                                               gdouble             y);
 140 static void          show_annotation_windows                 (EvView             *view,
 141                                                               gint                page);
 142 static void          hide_annotation_windows                 (EvView             *view,
 143                                                               gint                page);
 144 /*** GtkWidget implementation ***/
 145 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 146                                                               GtkRequisition     *requisition);
 147 static void       ev_view_size_request_continuous            (EvView             *view,
 148                                                               GtkRequisition     *requisition);
 149 static void       ev_view_size_request_dual_page             (EvView             *view,
 150                                                               GtkRequisition     *requisition);
 151 static void       ev_view_size_request_single_page           (EvView             *view,
 152                                                               GtkRequisition     *requisition);
 153 static void       ev_view_size_request                       (GtkWidget          *widget,
 154                                                               GtkRequisition     *requisition);
 155 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 156                                                               GtkAllocation      *allocation);
 157 static void       ev_view_realize                            (GtkWidget          *widget);
 158 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 159                                                               GdkEventScroll     *event);
 160 static gboolean   ev_view_draw                               (GtkWidget          *widget,
 161                                                               cairo_t            *cr);
 162 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 163 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 164                                                               GdkEventButton     *event);
 165 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 166                                                               GdkEventMotion     *event);
 167 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 168                                                               GdkEventButton     *event);
 169 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 170                                                               GdkEventCrossing   *event);
 171 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 172                                                               GdkEventCrossing   *event);
 173 static void       ev_view_style_set                          (GtkWidget          *widget,
 174                                                               GtkStyle           *old_style);
 175 static void       ev_view_remove_all                         (EvView             *view);
 176
 177 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 178
 179 /*** Drawing ***/
 180 static void       highlight_find_results                     (EvView             *view,
 181                                                               cairo_t            *cr,
 182                                                               int                 page);
 183 static void       highlight_forward_search_results           (EvView             *view,
 184                                                               cairo_t            *cr,
 185                                                               int                 page);
 186 static void       focus_annotation                           (EvView             *view,
 187                                                               cairo_t            *cr,
 188                                                               int                 page,
 189                                                               GdkRectangle       *clip);
 190 static void       draw_one_page                              (EvView             *view,
 191                                                               gint                page,
 192                                                               cairo_t            *cr,
 193                                                               GdkRectangle       *page_area,
 194                                                               GtkBorder          *border,
 195                                                               GdkRectangle       *expose_area,
 196                                                               gboolean           *page_ready);
 197 static void       show_loading_window                        (EvView             *view);
 198 static void       hide_loading_window                        (EvView             *view);
 199 static void       ev_view_reload_page                        (EvView             *view,
 200                                                               gint                page,
 201                                                               cairo_region_t     *region);
 202 static void       ev_view_loading_window_move                (EvView             *view);
 203
 204 /*** Callbacks ***/
 205 static void       ev_view_change_page                        (EvView             *view,
 206                                                               gint                new_page);
 207 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 208                                                               cairo_region_t     *region,
 209                                                               EvView             *view);
 210 static void       ev_view_page_changed_cb                    (EvDocumentModel    *model,
 211                                                               gint                old_page,
 212                                                               gint                new_page,
 213                                                               EvView             *view);
 214 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 215                                                               EvView             *view);
 216
 217 /*** GObject ***/
 218 static void       ev_view_finalize                           (GObject            *object);
 219 static void       ev_view_dispose                            (GObject            *object);
 220 static void       ev_view_class_init                         (EvViewClass        *class);
 221 static void       ev_view_init                               (EvView             *view);
 222
 223 /*** Zoom and sizing ***/
 224 static double   zoom_for_size_fit_width                      (gdouble doc_width,
 225                                                               gdouble doc_height,
 226                                                               int     target_width,
 227                                                               int     target_height);
 228 static double   zoom_for_size_fit_height                     (gdouble doc_width,
 229                                                               gdouble doc_height,
 230                                                               int     target_width,
 231                                                               int     target_height);
 232 static double   zoom_for_size_best_fit                       (gdouble doc_width,
 233                                                               gdouble doc_height,
 234                                                               int     target_width,
 235                                                               int     target_height);
 236 static void     ev_view_zoom_for_size                        (EvView *view,
 237                                                               int     width,
 238                                                               int     height);
 239 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 240                                                                 int     width,
 241                                                                 int     height);
 242 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 243                                                                 int     width,
 244                                                                 int     height);
 245 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 246                                                                 int     width,
 247                                                                 int     height);
 248 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 249                                                                 int     width,
 250                                                                 int     height);
 251 /*** Cursors ***/
 252 static void       ev_view_set_cursor                         (EvView             *view,
 253                                                               EvViewCursor        new_cursor);
 254 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 255                                                               gint x,
 256                                                               gint y);
 257
 258 /*** Find ***/
 259 static gint         ev_view_find_get_n_results               (EvView             *view,
 260                                                               gint                page);
 261 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 262                                                               gint                page,
 263                                                               gint                result);
 264 static void       jump_to_find_result                        (EvView             *view);
 265 static void       jump_to_find_page                          (EvView             *view,
 266                                                               EvViewFindDirection direction,
 267                                                               gint                shift);
 268 /*** Selection ***/
 269 static void       compute_selections                         (EvView             *view,
 270                                                               EvSelectionStyle    style,
 271                                                               GdkPoint           *start,
 272                                                               GdkPoint           *stop);
 273 static void       clear_selection                            (EvView             *view);
 274 static void       clear_link_selected                        (EvView             *view);
 275 static void       selection_free                             (EvViewSelection    *selection);
 276 static char*      get_selected_text                          (EvView             *ev_view);
 277 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 278                                                               GtkSelectionData   *selection_data,
 279                                                               guint               info,
 280                                                               gpointer            data);
 281 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 282                                                               gpointer            data);
 283 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 284
 285 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 286
 287 /* HeightToPage cache */
 288 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 289
 290 static void
 291 build_height_to_page (EvHeightToPageCache *cache,
 292                       EvDocument          *document,
 293                       gint                 rotation)
 294 {
 295         gboolean swap, uniform, dual_even_left;
 296         int i;
 297         double uniform_height, page_height, next_page_height;
 298         double saved_height;
 299         gdouble u_width, u_height;
 300         gint n_pages;
 301
 302         swap = (rotation == 90 || rotation == 270);
 303
 304         uniform = ev_document_is_page_size_uniform (document);
 305         n_pages = ev_document_get_n_pages (document);
 306         dual_even_left = (n_pages > 2);
 307
 308         g_free (cache->height_to_page);
 309         g_free (cache->dual_height_to_page);
 310
 311         cache->rotation = rotation;
 312         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 313         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 314
 315         if (uniform)
 316                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 317
 318         saved_height = 0;
 319         for (i = 0; i <= n_pages; i++) {
 320                 if (uniform) {
 321                         uniform_height = swap ? u_width : u_height;
 322                         cache->height_to_page[i] = i * uniform_height;
 323                 } else {
 324                         if (i < n_pages) {
 325                                 gdouble w, h;
 326
 327                                 ev_document_get_page_size (document, i, &w, &h);
 328                                 page_height = swap ? w : h;
 329                         } else {
 330                                 page_height = 0;
 331                         }
 332                         cache->height_to_page[i] = saved_height;
 333                         saved_height += page_height;
 334                 }
 335         }
 336
 337         if (dual_even_left && !uniform) {
 338                 gdouble w, h;
 339
 340                 ev_document_get_page_size (document, 0, &w, &h);
 341                 saved_height = swap ? w : h;
 342         } else {
 343                 saved_height = 0;
 344         }
 345
 346         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 347                 if (uniform) {
 348                         uniform_height = swap ? u_width : u_height;
 349                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 350                         if (i + 1 < n_pages + 2)
 351                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 352                 } else {
 353                         if (i + 1 < n_pages) {
 354                                 gdouble w, h;
 355
 356                                 ev_document_get_page_size (document, i + 1, &w, &h);
 357                                 next_page_height = swap ? w : h;
 358                         } else {
 359                                 next_page_height = 0;
 360                         }
 361
 362                         if (i < n_pages) {
 363                                 gdouble w, h;
 364
 365                                 ev_document_get_page_size (document, i, &w, &h);
 366                                 page_height = swap ? w : h;
 367                         } else {
 368                                 page_height = 0;
 369                         }
 370
 371                         if (i + 1 < n_pages + 2) {
 372                                 cache->dual_height_to_page[i] = saved_height;
 373                                 cache->dual_height_to_page[i + 1] = saved_height;
 374                                 saved_height += MAX(page_height, next_page_height);
 375                         } else {
 376                                 cache->dual_height_to_page[i] = saved_height;
 377                         }
 378                 }
 379         }
 380 }
 381
 382 static void
 383 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 384                                     EvDocument          *document,
 385                                     gint                 page,
 386                                     gint                 rotation,
 387                                     gdouble             *height,
 388                                     gdouble             *dual_height)
 389 {
 390         if (cache->rotation != rotation)
 391                 build_height_to_page (cache, document, rotation);
 392
 393         *height = cache->height_to_page[page];
 394         *dual_height = cache->dual_height_to_page[page];
 395 }
 396
 397 static void
 398 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 399 {
 400         if (cache->height_to_page) {
 401                 g_free (cache->height_to_page);
 402                 cache->height_to_page = NULL;
 403         }
 404
 405         if (cache->dual_height_to_page) {
 406                 g_free (cache->dual_height_to_page);
 407                 cache->dual_height_to_page = NULL;
 408         }
 409         g_free (cache);
 410 }
 411
 412 static EvHeightToPageCache *
 413 ev_view_get_height_to_page_cache (EvView *view)
 414 {
 415         EvHeightToPageCache *cache;
 416
 417         if (!view->document)
 418                 return NULL;
 419
 420         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 421         if (!cache) {
 422                 cache = g_new0 (EvHeightToPageCache, 1);
 423                 build_height_to_page (cache, view->document, view->rotation);
 424                 g_object_set_data_full (G_OBJECT (view->document),
 425                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 426                                         cache,
 427                                         (GDestroyNotify)ev_height_to_page_cache_free);
 428         }
 429
 430         return cache;
 431 }
 432
 433 static void
 434 ev_view_get_height_to_page (EvView *view,
 435                             gint    page,
 436                             gint   *height,
 437                             gint   *dual_height)
 438 {
 439         gdouble h, dh;
 440
 441         if (!view->height_to_page_cache)
 442                 return;
 443
 444         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 445                                             view->document,
 446                                             page,
 447                                             view->rotation,
 448                                             &h, &dh);
 449         if (height)
 450                 *height = (gint)(h * view->scale + 0.5);
 451
 452         if (dual_height)
 453                 *dual_height = (gint)(dh * view->scale + 0.5);
 454 }
 455
 456 static gint
 457 ev_view_get_scrollbar_size (EvView        *view,
 458                             GtkOrientation orientation)
 459 {
 460         GtkWidget *widget = GTK_WIDGET (view);
 461         GtkWidget *sb;
 462         GtkWidget *swindow = gtk_widget_get_parent (GTK_WIDGET (view));
 463         GtkAllocation allocation;
 464         GtkRequisition req;
 465         gint spacing;
 466
 467         if (!GTK_IS_SCROLLED_WINDOW (swindow))
 468                 return 0;
 469
 470         gtk_widget_get_allocation (widget, &allocation);
 471
 472         if (orientation == GTK_ORIENTATION_VERTICAL) {
 473                 if (allocation.height >= view->requisition.height)
 474                         sb = gtk_scrolled_window_get_vscrollbar (GTK_SCROLLED_WINDOW (swindow));
 475                 else
 476                         return 0;
 477         } else {
 478                 if (allocation.width >= view->requisition.width)
 479                         sb = gtk_scrolled_window_get_hscrollbar (GTK_SCROLLED_WINDOW (swindow));
 480                 else
 481                         return 0;
 482         }
 483
 484         gtk_widget_style_get (swindow, "scrollbar_spacing", &spacing, NULL);
 485         gtk_widget_size_request (sb, &req);
 486
 487         return (orientation == GTK_ORIENTATION_VERTICAL ? req.width : req.height) + spacing;
 488 }
 489
 490 static void
 491 scroll_to_point (EvView        *view,
 492                  gdouble        x,
 493                  gdouble        y,
 494                  GtkOrientation orientation)
 495 {
 496         gdouble page_size;
 497         gdouble upper, lower;
 498
 499         if (orientation == GTK_ORIENTATION_VERTICAL) {
 500                 page_size = gtk_adjustment_get_page_size (view->vadjustment);
 501                 upper = gtk_adjustment_get_upper (view->vadjustment);
 502                 lower = gtk_adjustment_get_lower (view->vadjustment);
 503
 504                 if (view->continuous) {
 505                         gtk_adjustment_clamp_page (view->vadjustment,
 506                                                    y - view->spacing / 2,
 507                                                    y + page_size);
 508                 } else {
 509                         gtk_adjustment_set_value (view->vadjustment,
 510                                                   CLAMP (y, lower, upper - page_size));
 511                 }
 512         } else {
 513                 page_size = gtk_adjustment_get_page_size (view->hadjustment);
 514                 upper = gtk_adjustment_get_upper (view->hadjustment);
 515                 lower = gtk_adjustment_get_lower (view->hadjustment);
 516
 517                 if (view->dual_page) {
 518                         gtk_adjustment_clamp_page (view->hadjustment, x,
 519                                                    x + page_size);
 520                 } else {
 521                         gtk_adjustment_set_value (view->hadjustment,
 522                                                   CLAMP (x, lower, upper - page_size));
 523                 }
 524         }
 525 }
 526
 527 static void
 528 ev_view_scroll_to_page_position (EvView *view, GtkOrientation orientation)
 529 {
 530         gdouble x, y;
 531
 532         if (!view->document)
 533                 return;
 534
 535         if ((orientation == GTK_ORIENTATION_VERTICAL && view->pending_point.y == 0) ||
 536             (orientation == GTK_ORIENTATION_HORIZONTAL && view->pending_point.x == 0)) {
 537                 GdkRectangle page_area;
 538                 GtkBorder    border;
 539
 540                 ev_view_get_page_extents (view, view->current_page, &page_area, &border);
 541                 x = page_area.x;
 542                 y = page_area.y;
 543         } else {
 544                 GdkPoint view_point;
 545
 546                 doc_point_to_view_point (view, view->current_page,
 547                                          &view->pending_point, &view_point);
 548                 x = view_point.x;
 549                 y = view_point.y;
 550         }
 551
 552         scroll_to_point (view, x, y, orientation);
 553 }
 554
 555 static void
 556 view_set_adjustment_values (EvView         *view,
 557                             GtkOrientation  orientation)
 558 {
 559         GtkWidget *widget = GTK_WIDGET (view);
 560         GtkAdjustment *adjustment;
 561         GtkAllocation allocation;
 562         int req_size;
 563         int alloc_size;
 564         gdouble page_size;
 565         gdouble value;
 566         gdouble upper;
 567         double factor;
 568         gint new_value;
 569
 570         gtk_widget_get_allocation (widget, &allocation);
 571
 572         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 573                 req_size = view->requisition.width;
 574                 alloc_size = allocation.width;
 575                 adjustment = view->hadjustment;
 576         } else {
 577                 req_size = view->requisition.height;
 578                 alloc_size = allocation.height;
 579                 adjustment = view->vadjustment;
 580         }
 581
 582         if (!adjustment)
 583                 return;
 584
 585         factor = 1.0;
 586         value = gtk_adjustment_get_value (adjustment);
 587         upper = gtk_adjustment_get_upper (adjustment);
 588         page_size = gtk_adjustment_get_page_size (adjustment);
 589
 590         switch (view->pending_scroll) {
 591                 case SCROLL_TO_KEEP_POSITION:
 592                 case SCROLL_TO_FIND_LOCATION:
 593                         factor = value / upper;
 594                         break;
 595                 case SCROLL_TO_PAGE_POSITION:
 596                         break;
 597                 case SCROLL_TO_CENTER:
 598                         factor = (value + page_size * 0.5) / upper;
 599                         break;
 600         }
 601
 602         upper = MAX (alloc_size, req_size);
 603         page_size = alloc_size;
 604
 605         gtk_adjustment_set_page_size (adjustment, page_size);
 606         gtk_adjustment_set_step_increment (adjustment, alloc_size * 0.1);
 607         gtk_adjustment_set_page_increment (adjustment, alloc_size * 0.9);
 608         gtk_adjustment_set_lower (adjustment, 0);
 609         gtk_adjustment_set_upper (adjustment, upper);
 610
 611         /*
 612          * We add 0.5 to the values before to average out our rounding errors.
 613          */
 614         switch (view->pending_scroll) {
 615                 case SCROLL_TO_KEEP_POSITION:
 616                 case SCROLL_TO_FIND_LOCATION:
 617                         new_value = CLAMP (upper * factor + 0.5, 0, upper - page_size);
 618                         gtk_adjustment_set_value (adjustment, (int)new_value);
 619                         break;
 620                 case SCROLL_TO_PAGE_POSITION:
 621                         ev_view_scroll_to_page_position (view, orientation);
 622                         break;
 623                 case SCROLL_TO_CENTER:
 624                         new_value = CLAMP (upper * factor - page_size * 0.5 + 0.5,
 625                                            0, upper - page_size);
 626                         gtk_adjustment_set_value (adjustment, (int)new_value);
 627                         break;
 628         }
 629
 630         gtk_adjustment_changed (adjustment);
 631 }
 632
 633 static void
 634 view_update_range_and_current_page (EvView *view)
 635 {
 636         gint start = view->start_page;
 637         gint end = view->end_page;
 638
 639         if (ev_document_get_n_pages (view->document) <= 0 ||
 640             !ev_document_check_dimensions (view->document))
 641                 return;
 642
 643         if (view->continuous) {
 644                 GdkRectangle current_area, unused, page_area;
 645                 GtkBorder border;
 646                 gboolean found = FALSE;
 647                 gint area_max = -1, area;
 648                 gint best_current_page = -1;
 649                 int i, j = 0;
 650
 651                 if (!(view->vadjustment && view->hadjustment))
 652                         return;
 653
 654                 current_area.x = gtk_adjustment_get_value (view->hadjustment);
 655                 current_area.width = gtk_adjustment_get_page_size (view->hadjustment);
 656                 current_area.y = gtk_adjustment_get_value (view->vadjustment);
 657                 current_area.height = gtk_adjustment_get_page_size (view->vadjustment);
 658
 659                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 660
 661                         ev_view_get_page_extents (view, i, &page_area, &border);
 662
 663                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 664                                 area = unused.width * unused.height;
 665
 666                                 if (!found) {
 667                                         area_max = area;
 668                                         view->start_page = i;
 669                                         found = TRUE;
 670                                         best_current_page = i;
 671                                 }
 672                                 if (area > area_max) {
 673                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 674                                         area_max = area;
 675                                 }
 676
 677                                 view->end_page = i;
 678                                 j = 0;
 679                         } else if (found && view->current_page <= view->end_page) {
 680                                 if (view->dual_page && j < 1) {
 681                                         /* In dual mode  we stop searching
 682                                          * after two consecutive non-visible pages.
 683                                          */
 684                                         j++;
 685                                         continue;
 686                                 }
 687                                 break;
 688                         }
 689                 }
 690
 691                 if (view->pending_scroll == SCROLL_TO_KEEP_POSITION) {
 692                         best_current_page = MAX (best_current_page, view->start_page);
 693
 694                         if (view->current_page != best_current_page) {
 695                                 view->current_page = best_current_page;
 696                                 hide_loading_window (view);
 697                                 ev_document_model_set_page (view->model, best_current_page);
 698                         }
 699                 }
 700         } else if (view->dual_page) {
 701                 if (view->current_page % 2 == get_dual_even_left (view)) {
 702                         view->start_page = view->current_page;
 703                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 704                                 view->end_page = view->start_page + 1;
 705                         else
 706                                 view->end_page = view->start_page;
 707                 } else {
 708                         if (view->current_page < 1)
 709                                 view->start_page = view->current_page;
 710                         else
 711                                 view->start_page = view->current_page - 1;
 712                         view->end_page = view->current_page;
 713                 }
 714         } else {
 715                 view->start_page = view->current_page;
 716                 view->end_page = view->current_page;
 717         }
 718
 719         if (view->start_page == -1 || view->end_page == -1)
 720                 return;
 721
 722         if (start != view->start_page || end != view->end_page) {
 723                 gint i;
 724
 725                 for (i = start; i < view->start_page && start != -1; i++) {
 726                         hide_annotation_windows (view, i);
 727                 }
 728
 729                 for (i = end; i > view->end_page && end != -1; i--) {
 730                         hide_annotation_windows (view, i);
 731                 }
 732         }
 733
 734         ev_page_cache_set_page_range (view->page_cache,
 735                                       view->start_page,
 736                                       view->end_page);
 737         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 738                                         view->start_page,
 739                                         view->end_page,
 740                                         view->selection_info.selections);
 741
 742         if (ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page))
 743             gtk_widget_queue_draw (GTK_WIDGET (view));
 744 }
 745
 746 static void
 747 set_scroll_adjustment (EvView *view,
 748                        GtkOrientation  orientation,
 749                        GtkAdjustment  *adjustment)
 750 {
 751         GtkAdjustment **to_set;
 752
 753         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 754                 to_set = &view->hadjustment;
 755         else
 756                 to_set = &view->vadjustment;
 757
 758         if (*to_set != adjustment) {
 759                 if (*to_set) {
 760                         g_signal_handlers_disconnect_by_func (*to_set,
 761                                                               (gpointer) on_adjustment_value_changed,
 762                                                               view);
 763                         g_object_unref (*to_set);
 764                 }
 765
 766                 *to_set = adjustment;
 767                 view_set_adjustment_values (view, orientation);
 768
 769                 if (*to_set) {
 770                         g_object_ref (*to_set);
 771                         g_signal_connect (*to_set, "value_changed",
 772                                           G_CALLBACK (on_adjustment_value_changed), view);
 773                 }
 774         }
 775 }
 776
 777 static void
 778 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 779                                 GtkAdjustment  *hadjustment,
 780                                 GtkAdjustment  *vadjustment)
 781 {
 782         EvView *view = EV_VIEW (layout);
 783
 784         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 785         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 786
 787         on_adjustment_value_changed (NULL, view);
 788 }
 789
 790 static void
 791 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 792                            guint           keyval,
 793                            GdkModifierType modifiers,
 794                            GtkScrollType   scroll,
 795                            gboolean        horizontal)
 796 {
 797   guint keypad_keyval = keyval - GDK_KEY_Left + GDK_KEY_KP_Left;
 798
 799   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 800                                 "binding_activated", 2,
 801                                 GTK_TYPE_SCROLL_TYPE, scroll,
 802                                 G_TYPE_BOOLEAN, horizontal);
 803   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 804                                 "binding_activated", 2,
 805                                 GTK_TYPE_SCROLL_TYPE, scroll,
 806                                 G_TYPE_BOOLEAN, horizontal);
 807 }
 808
 809 static gdouble
 810 compute_scroll_increment (EvView        *view,
 811                           GtkScrollType  scroll)
 812 {
 813         GtkWidget *widget = GTK_WIDGET (view);
 814         GtkAdjustment *adjustment = view->vadjustment;
 815         cairo_region_t *text_region, *region;
 816         GtkAllocation allocation;
 817         gint page;
 818         GdkRectangle rect;
 819         EvRectangle doc_rect;
 820         GdkRectangle page_area;
 821         GtkBorder border;
 822         gdouble fraction = 1.0;
 823
 824         if (scroll != GTK_SCROLL_PAGE_BACKWARD && scroll != GTK_SCROLL_PAGE_FORWARD)
 825                 return gtk_adjustment_get_page_size (adjustment);
 826
 827         page = scroll == GTK_SCROLL_PAGE_BACKWARD ? view->start_page : view->end_page;
 828
 829         text_region = ev_page_cache_get_text_mapping (view->page_cache, page);
 830         if (!text_region || cairo_region_is_empty (text_region))
 831                 return gtk_adjustment_get_page_size (adjustment);
 832
 833         gtk_widget_get_allocation (widget, &allocation);
 834         ev_view_get_page_extents (view, page, &page_area, &border);
 835         rect.x = page_area.x + view->scroll_x;
 836         rect.y = view->scroll_y + (scroll == GTK_SCROLL_PAGE_BACKWARD ? 5 : allocation.height - 5);
 837         rect.width = page_area.width;
 838         rect.height = 1;
 839         view_rect_to_doc_rect (view, &rect, &page_area, &doc_rect);
 840
 841         /* Convert the doc rectangle into a GdkRectangle */
 842         rect.x = doc_rect.x1;
 843         rect.y = doc_rect.y1;
 844         rect.width = doc_rect.x2 - doc_rect.x1;
 845         rect.height = MAX (1, doc_rect.y2 - doc_rect.y1);
 846         region = cairo_region_create_rectangle (&rect);
 847
 848         cairo_region_intersect (region, text_region);
 849         if (cairo_region_num_rectangles (region)) {
 850                 EvRenderContext *rc;
 851                 EvPage  *ev_page;
 852                 cairo_region_t *sel_region;
 853
 854                 cairo_region_get_rectangle (region, 0, &rect);
 855                 ev_page = ev_document_get_page (view->document, page);
 856                 rc = ev_render_context_new (ev_page, view->rotation, view->scale);
 857                 g_object_unref (ev_page);
 858                 /* Get the selection region to know the height of the line */
 859                 doc_rect.x1 = doc_rect.x2 = rect.x + 0.5;
 860                 doc_rect.y1 = doc_rect.y2 = rect.y + 0.5;
 861
 862                 ev_document_doc_mutex_lock ();
 863                 sel_region = ev_selection_get_selection_region (EV_SELECTION (view->document),
 864                                                                 rc, EV_SELECTION_STYLE_LINE,
 865                                                                 &doc_rect);
 866                 ev_document_doc_mutex_unlock ();
 867
 868                 g_object_unref (rc);
 869
 870                 if (cairo_region_num_rectangles (sel_region) > 0) {
 871                         cairo_region_get_rectangle (sel_region, 0, &rect);
 872                         fraction = 1 - (rect.height / gtk_adjustment_get_page_size (adjustment));
 873                 }
 874                 cairo_region_destroy (sel_region);
 875         }
 876         cairo_region_destroy (region);
 877
 878         return gtk_adjustment_get_page_size (adjustment) * fraction;
 879
 880 }
 881
 882 void
 883 ev_view_scroll (EvView        *view,
 884                 GtkScrollType  scroll,
 885                 gboolean       horizontal)
 886 {
 887         GtkAdjustment *adjustment;
 888         double value, increment;
 889         gdouble upper, lower;
 890         gdouble page_size;
 891         gdouble step_increment;
 892         gboolean first_page = FALSE;
 893         gboolean last_page = FALSE;
 894
 895         view->jump_to_find_result = FALSE;
 896
 897         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
 898                 switch (scroll) {
 899                         case GTK_SCROLL_PAGE_BACKWARD:
 900                         case GTK_SCROLL_STEP_BACKWARD:
 901                                 ev_view_previous_page (view);
 902                                 break;
 903                         case GTK_SCROLL_PAGE_FORWARD:
 904                         case GTK_SCROLL_STEP_FORWARD:
 905                                 ev_view_next_page (view);
 906                                 break;
 907                         default:
 908                                 break;
 909                 }
 910                 return;
 911         }
 912
 913         /* Assign values for increment and vertical adjustment */
 914         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 915         value = gtk_adjustment_get_value (adjustment);
 916         upper = gtk_adjustment_get_upper (adjustment);
 917         lower = gtk_adjustment_get_lower (adjustment);
 918         page_size = gtk_adjustment_get_page_size (adjustment);
 919         step_increment = gtk_adjustment_get_step_increment (adjustment);
 920
 921         /* Assign boolean for first and last page */
 922         if (view->current_page == 0)
 923                 first_page = TRUE;
 924         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 925                 last_page = TRUE;
 926
 927         switch (scroll) {
 928                 case GTK_SCROLL_PAGE_BACKWARD:
 929                         /* Do not jump backwards if at the first page */
 930                         if (value == lower && first_page) {
 931                                 /* Do nothing */
 932                                 /* At the top of a page, assign the upper bound limit of previous page */
 933                         } else if (value == lower) {
 934                                 value = upper - page_size;
 935                                 ev_view_previous_page (view);
 936                                 /* Jump to the top */
 937                         } else {
 938                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_BACKWARD);
 939                                 value = MAX (value - increment, lower);
 940                         }
 941                         break;
 942                 case GTK_SCROLL_PAGE_FORWARD:
 943                         /* Do not jump forward if at the last page */
 944                         if (value == (upper - page_size) && last_page) {
 945                                 /* Do nothing */
 946                         /* At the bottom of a page, assign the lower bound limit of next page */
 947                         } else if (value == (upper - page_size)) {
 948                                 value = 0;
 949                                 ev_view_next_page (view);
 950                         /* Jump to the bottom */
 951                         } else {
 952                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_FORWARD);
 953                                 value = MIN (value + increment, upper - page_size);
 954                         }
 955                         break;
 956                 case GTK_SCROLL_STEP_BACKWARD:
 957                         value -= step_increment;
 958                         break;
 959                 case GTK_SCROLL_STEP_FORWARD:
 960                         value += step_increment;
 961                         break;
 962                 case GTK_SCROLL_STEP_DOWN:
 963                         value -= step_increment / 10;
 964                         break;
 965                 case GTK_SCROLL_STEP_UP:
 966                         value += step_increment / 10;
 967                         break;
 968                 default:
 969                         break;
 970         }
 971
 972         value = CLAMP (value, lower, upper - page_size);
 973
 974         gtk_adjustment_set_value (adjustment, value);
 975 }
 976
 977 #define MARGIN 5
 978
 979 static void
 980 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 981 {
 982         GtkWidget *widget = GTK_WIDGET (view);
 983         GtkAdjustment *adjustment;
 984         GtkAllocation allocation;
 985         gdouble adj_value;
 986         int value;
 987
 988         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 989
 990         gtk_widget_get_allocation (widget, &allocation);
 991
 992         adjustment = view->vadjustment;
 993         adj_value = gtk_adjustment_get_value (adjustment);
 994
 995         if (rect->y < adj_value) {
 996                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->y - MARGIN);
 997                 gtk_adjustment_set_value (view->vadjustment, value);
 998         } else if (rect->y + rect->height > adj_value + allocation.height) {
 999                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->y + rect->height -
1000                              allocation.height + MARGIN);
1001                 gtk_adjustment_set_value (view->vadjustment, value);
1002         }
1003
1004         adjustment = view->hadjustment;
1005         adj_value = gtk_adjustment_get_value (adjustment);
1006
1007         if (rect->x < adj_value) {
1008                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->x - MARGIN);
1009                 gtk_adjustment_set_value (view->hadjustment, value);
1010         } else if (rect->x + rect->height > adj_value + allocation.width) {
1011                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->x + rect->width -
1012                              allocation.width + MARGIN);
1013                 gtk_adjustment_set_value (view->hadjustment, value);
1014         }
1015
1016         gtk_widget_queue_resize (GTK_WIDGET (view));
1017 }
1018
1019 /*** Geometry computations ***/
1020
1021 static void
1022 compute_border (EvView *view, int width, int height, GtkBorder *border)
1023 {
1024         ev_document_misc_get_page_border_size (width, height, border);
1025 }
1026
1027 void
1028 _get_page_size_for_scale_and_rotation (EvDocument *document,
1029                                        gint        page,
1030                                        gdouble     scale,
1031                                        gint        rotation,
1032                                        gint       *page_width,
1033                                        gint       *page_height)
1034 {
1035         gdouble w, h;
1036         gint    width, height;
1037
1038         ev_document_get_page_size (document, page, &w, &h);
1039
1040         width = (gint)(w * scale + 0.5);
1041         height = (gint)(h * scale + 0.5);
1042
1043         if (page_width)
1044                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
1045         if (page_height)
1046                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
1047 }
1048
1049 static void
1050 ev_view_get_page_size (EvView *view,
1051                        gint    page,
1052                        gint   *page_width,
1053                        gint   *page_height)
1054 {
1055         _get_page_size_for_scale_and_rotation (view->document,
1056                                                page,
1057                                                view->scale,
1058                                                view->rotation,
1059                                                page_width,
1060                                                page_height);
1061 }
1062
1063 static void
1064 ev_view_get_max_page_size (EvView *view,
1065                            gint   *max_width,
1066                            gint   *max_height)
1067 {
1068         double w, h;
1069         gint   width, height;
1070
1071         ev_document_get_max_page_size (view->document, &w, &h);
1072
1073         width = (gint)(w * view->scale + 0.5);
1074         height = (gint)(h * view->scale + 0.5);
1075
1076         if (max_width)
1077                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
1078         if (max_height)
1079                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
1080 }
1081
1082 static void
1083 get_page_y_offset (EvView *view, int page, int *y_offset)
1084 {
1085         int max_width, offset;
1086         GtkBorder border;
1087
1088         g_return_if_fail (y_offset != NULL);
1089
1090         ev_view_get_max_page_size (view, &max_width, NULL);
1091         compute_border (view, max_width, max_width, &border);
1092
1093         if (view->dual_page) {
1094                 ev_view_get_height_to_page (view, page, NULL, &offset);
1095                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
1096                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
1097         } else {
1098                 ev_view_get_height_to_page (view, page, &offset, NULL);
1099                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
1100         }
1101
1102         *y_offset = offset;
1103         return;
1104 }
1105
1106 gboolean
1107 ev_view_get_page_extents (EvView       *view,
1108                           gint          page,
1109                           GdkRectangle *page_area,
1110                           GtkBorder    *border)
1111 {
1112         GtkWidget *widget;
1113         int width, height;
1114         GtkAllocation allocation;
1115
1116         widget = GTK_WIDGET (view);
1117         gtk_widget_get_allocation (widget, &allocation);
1118
1119         /* Get the size of the page */
1120         ev_view_get_page_size (view, page, &width, &height);
1121         compute_border (view, width, height, border);
1122         page_area->width = width + border->left + border->right;
1123         page_area->height = height + border->top + border->bottom;
1124
1125         if (view->continuous) {
1126                 gint max_width;
1127                 gint x, y;
1128
1129                 ev_view_get_max_page_size (view, &max_width, NULL);
1130                 max_width = max_width + border->left + border->right;
1131                 /* Get the location of the bounding box */
1132                 if (view->dual_page) {
1133                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1134                         x = x + MAX (0, allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1135                         if (page % 2 == get_dual_even_left (view))
1136                                 x = x + (max_width - width - border->left - border->right);
1137                 } else {
1138                         x = view->spacing;
1139                         x = x + MAX (0, allocation.width - (width + view->spacing * 2)) / 2;
1140                 }
1141
1142                 get_page_y_offset (view, page, &y);
1143
1144                 page_area->x = x;
1145                 page_area->y = y;
1146         } else {
1147                 gint x, y;
1148                 if (view->dual_page) {
1149                         gint width_2, height_2;
1150                         gint max_width = width;
1151                         gint max_height = height;
1152                         GtkBorder overall_border;
1153                         gint other_page;
1154
1155                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1156
1157                         /* First, we get the bounding box of the two pages */
1158                         if (other_page < ev_document_get_n_pages (view->document)
1159                             && (0 <= other_page)) {
1160                                 ev_view_get_page_size (view, other_page,
1161                                                        &width_2, &height_2);
1162                                 if (width_2 > width)
1163                                         max_width = width_2;
1164                                 if (height_2 > height)
1165                                         max_height = height_2;
1166                         }
1167                         compute_border (view, max_width, max_height, &overall_border);
1168
1169                         /* Find the offsets */
1170                         x = view->spacing;
1171                         y = view->spacing;
1172
1173                         /* Adjust for being the left or right page */
1174                         if (page % 2 == get_dual_even_left (view))
1175                                 x = x + max_width - width;
1176                         else
1177                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1178
1179                         y = y + (max_height - height)/2;
1180
1181                         /* Adjust for extra allocation */
1182                         x = x + MAX (0, allocation.width -
1183                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1184                         y = y + MAX (0, allocation.height - (height + view->spacing * 2))/2;
1185                 } else {
1186                         x = view->spacing;
1187                         y = view->spacing;
1188
1189                         /* Adjust for extra allocation */
1190                         x = x + MAX (0, allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1191                         y = y + MAX (0, allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1192                 }
1193
1194                 page_area->x = x;
1195                 page_area->y = y;
1196         }
1197
1198         return TRUE;
1199 }
1200
1201 static void
1202 get_doc_page_size (EvView  *view,
1203                    gint     page,
1204                    gdouble *width,
1205                    gdouble *height)
1206 {
1207         double w, h;
1208
1209         ev_document_get_page_size (view->document, page, &w, &h);
1210         if (view->rotation == 0 || view->rotation == 180) {
1211                 if (width) *width = w;
1212                 if (height) *height = h;
1213         } else {
1214                 if (width) *width = h;
1215                 if (height) *height = w;
1216         }
1217 }
1218
1219 static void
1220 view_point_to_doc_point (EvView *view,
1221                          GdkPoint *view_point,
1222                          GdkRectangle *page_area,
1223                          double  *doc_point_x,
1224                          double  *doc_point_y)
1225 {
1226         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1227         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1228 }
1229
1230 static void
1231 view_rect_to_doc_rect (EvView *view,
1232                        GdkRectangle *view_rect,
1233                        GdkRectangle *page_area,
1234                        EvRectangle  *doc_rect)
1235 {
1236         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1237         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1238         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1239         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1240 }
1241
1242 static void
1243 doc_point_to_view_point (EvView       *view,
1244                          int           page,
1245                          EvPoint      *doc_point,
1246                          GdkPoint     *view_point)
1247 {
1248         GdkRectangle page_area;
1249         GtkBorder border;
1250         double x, y, view_x, view_y;
1251         gdouble width, height;
1252
1253         get_doc_page_size (view, page, &width, &height);
1254
1255         if (view->rotation == 0) {
1256                 x = doc_point->x;
1257                 y = doc_point->y;
1258         } else if (view->rotation == 90) {
1259                 x = width - doc_point->y;
1260                 y = doc_point->x;
1261         } else if (view->rotation == 180) {
1262                 x = width - doc_point->x;
1263                 y = height - doc_point->y;
1264         } else if (view->rotation == 270) {
1265                 x = doc_point->y;
1266                 y = height - doc_point->x;
1267         } else {
1268                 g_assert_not_reached ();
1269         }
1270
1271         ev_view_get_page_extents (view, page, &page_area, &border);
1272
1273         view_x = CLAMP (x * view->scale, 0, page_area.width);
1274         view_y = CLAMP (y * view->scale, 0, page_area.height);
1275         view_point->x = view_x + page_area.x;
1276         view_point->y = view_y + page_area.y;
1277 }
1278
1279 static void
1280 doc_rect_to_view_rect (EvView       *view,
1281                        int           page,
1282                        EvRectangle  *doc_rect,
1283                        GdkRectangle *view_rect)
1284 {
1285         GdkRectangle page_area;
1286         GtkBorder border;
1287         double x, y, w, h;
1288         gdouble width, height;
1289
1290         get_doc_page_size (view, page, &width, &height);
1291
1292         if (view->rotation == 0) {
1293                 x = doc_rect->x1;
1294                 y = doc_rect->y1;
1295                 w = doc_rect->x2 - doc_rect->x1;
1296                 h = doc_rect->y2 - doc_rect->y1;
1297         } else if (view->rotation == 90) {
1298                 x = width - doc_rect->y2;
1299                 y = doc_rect->x1;
1300                 w = doc_rect->y2 - doc_rect->y1;
1301                 h = doc_rect->x2 - doc_rect->x1;
1302         } else if (view->rotation == 180) {
1303                 x = width - doc_rect->x2;
1304                 y = height - doc_rect->y2;
1305                 w = doc_rect->x2 - doc_rect->x1;
1306                 h = doc_rect->y2 - doc_rect->y1;
1307         } else if (view->rotation == 270) {
1308                 x = doc_rect->y1;
1309                 y = height - doc_rect->x2;
1310                 w = doc_rect->y2 - doc_rect->y1;
1311                 h = doc_rect->x2 - doc_rect->x1;
1312         } else {
1313                 g_assert_not_reached ();
1314         }
1315
1316         ev_view_get_page_extents (view, page, &page_area, &border);
1317
1318         view_rect->x = x * view->scale + page_area.x;
1319         view_rect->y = y * view->scale + page_area.y;
1320         view_rect->width = w * view->scale;
1321         view_rect->height = h * view->scale;
1322 }
1323
1324 static gboolean
1325 get_dual_even_left (EvView *view)
1326 {
1327         return (ev_document_get_n_pages (view->document) > 2);
1328 }
1329
1330 static void
1331 find_page_at_location (EvView  *view,
1332                        gdouble  x,
1333                        gdouble  y,
1334                        gint    *page,
1335                        gint    *x_offset,
1336                        gint    *y_offset)
1337 {
1338         int i;
1339
1340         if (view->document == NULL)
1341                 return;
1342
1343         g_assert (page);
1344         g_assert (x_offset);
1345         g_assert (y_offset);
1346
1347         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1348                 GdkRectangle page_area;
1349                 GtkBorder border;
1350
1351                 if (! ev_view_get_page_extents (view, i, &page_area, &border))
1352                         continue;
1353
1354                 if ((x >= page_area.x + border.left) &&
1355                     (x < page_area.x + page_area.width - border.right) &&
1356                     (y >= page_area.y + border.top) &&
1357                     (y < page_area.y + page_area.height - border.bottom)) {
1358                         *page = i;
1359                         *x_offset = x - (page_area.x + border.left);
1360                         *y_offset = y - (page_area.y + border.top);
1361                         return;
1362                 }
1363         }
1364
1365         *page = -1;
1366 }
1367
1368 static gboolean
1369 location_in_text (EvView  *view,
1370                   gdouble  x,
1371                   gdouble  y)
1372 {
1373         cairo_region_t *region;
1374         gint page = -1;
1375         gint x_offset = 0, y_offset = 0;
1376
1377         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1378
1379         if (page == -1)
1380                 return FALSE;
1381
1382         region = ev_page_cache_get_text_mapping (view->page_cache, page);
1383
1384         if (region)
1385                 return cairo_region_contains_point (region, x_offset / view->scale, y_offset / view->scale);
1386         else
1387                 return FALSE;
1388 }
1389
1390 static gboolean
1391 location_in_selected_text (EvView  *view,
1392                            gdouble  x,
1393                            gdouble  y)
1394 {
1395         gint page = -1;
1396         gint x_offset = 0, y_offset = 0;
1397         EvViewSelection *selection;
1398         GList *l = NULL;
1399
1400         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1401                 selection = (EvViewSelection *)l->data;
1402
1403                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1404
1405                 if (page != selection->page)
1406                         continue;
1407
1408                 if (selection->covered_region &&
1409                     cairo_region_contains_point (selection->covered_region, x_offset, y_offset))
1410                         return TRUE;
1411         }
1412
1413         return FALSE;
1414 }
1415
1416 static gboolean
1417 get_doc_point_from_offset (EvView *view,
1418                            gint    page,
1419                            gint    x_offset,
1420                            gint    y_offset,
1421                            gint   *x_new,
1422                            gint   *y_new)
1423 {
1424         gdouble width, height;
1425         double x, y;
1426
1427         get_doc_page_size (view, page, &width, &height);
1428
1429         x_offset = x_offset / view->scale;
1430         y_offset = y_offset / view->scale;
1431
1432         if (view->rotation == 0) {
1433                 x = x_offset;
1434                 y = y_offset;
1435         } else if (view->rotation == 90) {
1436                 x = y_offset;
1437                 y = width - x_offset;
1438         } else if (view->rotation == 180) {
1439                 x = width - x_offset;
1440                 y = height - y_offset;
1441         } else if (view->rotation == 270) {
1442                 x = height - y_offset;
1443                 y = x_offset;
1444         } else {
1445                 g_assert_not_reached ();
1446         }
1447
1448         *x_new = x;
1449         *y_new = y;
1450
1451         return TRUE;
1452 }
1453
1454 static gboolean
1455 get_doc_point_from_location (EvView  *view,
1456                              gdouble  x,
1457                              gdouble  y,
1458                              gint    *page,
1459                              gint    *x_new,
1460                              gint    *y_new)
1461 {
1462         gint x_offset = 0, y_offset = 0;
1463
1464         x += view->scroll_x;
1465         y += view->scroll_y;
1466         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1467         if (*page == -1)
1468                 return FALSE;
1469
1470         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1471 }
1472
1473 static void
1474 ev_view_get_area_from_mapping (EvView        *view,
1475                                guint          page,
1476                                EvMappingList *mapping_list,
1477                                gconstpointer  data,
1478                                GdkRectangle  *area)
1479 {
1480         EvMapping *mapping;
1481
1482         mapping = ev_mapping_list_find (mapping_list, data);
1483         doc_rect_to_view_rect (view, page, &mapping->area, area);
1484         area->x -= view->scroll_x;
1485         area->y -= view->scroll_y;
1486 }
1487
1488
1489 /*** Hyperref ***/
1490 static EvLink *
1491 ev_view_get_link_at_location (EvView  *view,
1492                               gdouble  x,
1493                               gdouble  y)
1494 {
1495         gint page = -1;
1496         gint x_new = 0, y_new = 0;
1497         EvMappingList *link_mapping;
1498
1499         if (!EV_IS_DOCUMENT_LINKS (view->document))
1500                 return NULL;
1501
1502         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1503                 return NULL;
1504
1505         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
1506
1507         if (link_mapping)
1508                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1509         else
1510                 return NULL;
1511 }
1512
1513 static void
1514 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1515 {
1516         EvPoint doc_point;
1517         gdouble zoom, left, top;
1518         gboolean change_left, change_top;
1519         GtkAllocation allocation;
1520
1521         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1522
1523         left = ev_link_dest_get_left (dest, &change_left);
1524         top = ev_link_dest_get_top (dest, &change_top);
1525
1526         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1527                                        ev_link_dest_get_bottom (dest) - top,
1528                                        allocation.width,
1529                                        allocation.height);
1530
1531         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1532         ev_document_model_set_scale (view->model, zoom);
1533
1534         doc_point.x = change_left ? left : 0;
1535         doc_point.y = change_top ? top : 0;
1536         view->pending_point = doc_point;
1537
1538         ev_view_change_page (view, ev_link_dest_get_page (dest));
1539 }
1540
1541 static void
1542 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1543 {
1544         EvPoint doc_point;
1545         gdouble doc_width, doc_height;
1546         gint page;
1547         double zoom, left;
1548         gboolean change_left;
1549         GtkAllocation allocation;
1550
1551         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1552
1553         page = ev_link_dest_get_page (dest);
1554         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1555
1556         left = ev_link_dest_get_left (dest, &change_left);
1557         doc_point.x = change_left ? left : 0;
1558         doc_point.y = 0;
1559
1560         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1561                                          allocation.width,
1562                                          allocation.height);
1563
1564         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1565         ev_document_model_set_scale (view->model, zoom);
1566
1567         view->pending_point = doc_point;
1568
1569         ev_view_change_page (view, page);
1570 }
1571
1572 static void
1573 goto_fith_dest (EvView *view, EvLinkDest *dest)
1574 {
1575         EvPoint doc_point;
1576         gdouble doc_width, doc_height;
1577         gint page;
1578         gdouble zoom, top;
1579         gboolean change_top;
1580         GtkAllocation allocation;
1581
1582         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1583
1584         page = ev_link_dest_get_page (dest);
1585         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1586
1587         top = ev_link_dest_get_top (dest, &change_top);
1588
1589         doc_point.x = 0;
1590         doc_point.y = change_top ? top : 0;
1591
1592         zoom = zoom_for_size_fit_width (doc_width, top,
1593                                         allocation.width,
1594                                         allocation.height);
1595
1596         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1597         ev_document_model_set_scale (view->model, zoom);
1598
1599         view->pending_point = doc_point;
1600
1601         ev_view_change_page (view, page);
1602 }
1603
1604 static void
1605 goto_fit_dest (EvView *view, EvLinkDest *dest)
1606 {
1607         double zoom;
1608         gdouble doc_width, doc_height;
1609         int page;
1610         GtkAllocation allocation;
1611
1612         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1613
1614         page = ev_link_dest_get_page (dest);
1615         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1616
1617         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1618                                        allocation.width,
1619                                        allocation.height);
1620
1621         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1622         ev_document_model_set_scale (view->model, zoom);
1623
1624         ev_view_change_page (view, page);
1625 }
1626
1627 static void
1628 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1629 {
1630         EvPoint doc_point;
1631         gint page;
1632         gdouble zoom, left, top;
1633         gboolean change_zoom, change_left, change_top;
1634
1635         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1636         page = ev_link_dest_get_page (dest);
1637
1638         if (change_zoom && zoom > 1) {
1639                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1640                 ev_document_model_set_scale (view->model, zoom);
1641         }
1642
1643         left = ev_link_dest_get_left (dest, &change_left);
1644         top = ev_link_dest_get_top (dest, &change_top);
1645
1646         doc_point.x = change_left ? left : 0;
1647         doc_point.y = change_top ? top : 0;
1648         view->pending_point = doc_point;
1649
1650         ev_view_change_page (view, page);
1651 }
1652
1653 static void
1654 goto_dest (EvView *view, EvLinkDest *dest)
1655 {
1656         EvLinkDestType type;
1657         int page, n_pages, current_page;
1658
1659         page = ev_link_dest_get_page (dest);
1660         n_pages = ev_document_get_n_pages (view->document);
1661
1662         if (page < 0 || page >= n_pages)
1663                 return;
1664
1665         current_page = view->current_page;
1666
1667         type = ev_link_dest_get_dest_type (dest);
1668
1669         switch (type) {
1670                 case EV_LINK_DEST_TYPE_PAGE:
1671                         ev_document_model_set_page (view->model, page);
1672                         break;
1673                 case EV_LINK_DEST_TYPE_FIT:
1674                         goto_fit_dest (view, dest);
1675                         break;
1676                 case EV_LINK_DEST_TYPE_FITH:
1677                         goto_fith_dest (view, dest);
1678                         break;
1679                 case EV_LINK_DEST_TYPE_FITV:
1680                         goto_fitv_dest (view, dest);
1681                         break;
1682                 case EV_LINK_DEST_TYPE_FITR:
1683                         goto_fitr_dest (view, dest);
1684                         break;
1685                 case EV_LINK_DEST_TYPE_XYZ:
1686                         goto_xyz_dest (view, dest);
1687                         break;
1688                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1689                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1690                         break;
1691                 default:
1692                         g_assert_not_reached ();
1693         }
1694
1695         if (current_page != view->current_page)
1696                 ev_document_model_set_page (view->model, view->current_page);
1697 }
1698
1699 static void
1700 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1701 {
1702         EvLinkDestType type;
1703
1704         type = ev_link_dest_get_dest_type (dest);
1705
1706         if (type == EV_LINK_DEST_TYPE_NAMED) {
1707                 EvLinkDest  *dest2;
1708                 const gchar *named_dest;
1709
1710                 named_dest = ev_link_dest_get_named_dest (dest);
1711                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1712                                                           named_dest);
1713                 if (dest2) {
1714                         goto_dest (view, dest2);
1715                         g_object_unref (dest2);
1716                 }
1717
1718                 return;
1719         }
1720
1721         goto_dest (view, dest);
1722 }
1723
1724 void
1725 ev_view_handle_link (EvView *view, EvLink *link)
1726 {
1727         EvLinkAction    *action = NULL;
1728         EvLinkActionType type;
1729
1730         action = ev_link_get_action (link);
1731         if (!action)
1732                 return;
1733
1734         type = ev_link_action_get_action_type (action);
1735
1736         switch (type) {
1737                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1738                         EvLinkDest *dest;
1739
1740                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1741
1742                         dest = ev_link_action_get_dest (action);
1743                         ev_view_goto_dest (view, dest);
1744                 }
1745                         break;
1746                 case EV_LINK_ACTION_TYPE_LAYERS_STATE: {
1747                         GList            *show, *hide, *toggle;
1748                         GList            *l;
1749                         EvDocumentLayers *document_layers;
1750
1751                         document_layers = EV_DOCUMENT_LAYERS (view->document);
1752
1753                         show = ev_link_action_get_show_list (action);
1754                         for (l = show; l; l = g_list_next (l)) {
1755                                 ev_document_layers_show_layer (document_layers, EV_LAYER (l->data));
1756                         }
1757
1758                         hide = ev_link_action_get_hide_list (action);
1759                         for (l = hide; l; l = g_list_next (l)) {
1760                                 ev_document_layers_hide_layer (document_layers, EV_LAYER (l->data));
1761                         }
1762
1763                         toggle = ev_link_action_get_toggle_list (action);
1764                         for (l = toggle; l; l = g_list_next (l)) {
1765                                 EvLayer *layer = EV_LAYER (l->data);
1766
1767                                 if (ev_document_layers_layer_is_visible (document_layers, layer)) {
1768                                         ev_document_layers_hide_layer (document_layers, layer);
1769                                 } else {
1770                                         ev_document_layers_show_layer (document_layers, layer);
1771                                 }
1772                         }
1773
1774                         g_signal_emit (view, signals[SIGNAL_LAYERS_CHANGED], 0);
1775                         ev_view_reload_page (view, view->current_page, NULL);
1776                 }
1777                         break;
1778                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1779                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1780                 case EV_LINK_ACTION_TYPE_LAUNCH:
1781                 case EV_LINK_ACTION_TYPE_NAMED:
1782                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1783                         break;
1784         }
1785 }
1786
1787 static char *
1788 tip_from_action_named (EvLinkAction *action)
1789 {
1790         const gchar *name = ev_link_action_get_name (action);
1791
1792         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1793                 return g_strdup (_("Go to first page"));
1794         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1795                 return g_strdup (_("Go to previous page"));
1796         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1797                 return g_strdup (_("Go to next page"));
1798         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1799                 return g_strdup (_("Go to last page"));
1800         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1801                 return g_strdup (_("Go to page"));
1802         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1803                 return g_strdup (_("Find"));
1804         }
1805
1806         return NULL;
1807 }
1808
1809 static char *
1810 tip_from_link (EvView *view, EvLink *link)
1811 {
1812         EvLinkAction *action;
1813         EvLinkActionType type;
1814         char *msg = NULL;
1815         char *page_label;
1816         const char *title;
1817
1818         action = ev_link_get_action (link);
1819         title = ev_link_get_title (link);
1820
1821         if (!action)
1822                 return title ? g_strdup (title) : NULL;
1823
1824         type = ev_link_action_get_action_type (action);
1825
1826         switch (type) {
1827                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1828                         page_label = ev_document_links_get_dest_page_label (EV_DOCUMENT_LINKS (view->document),
1829                                                                             ev_link_action_get_dest (action));
1830                         if (page_label) {
1831                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1832                                 g_free (page_label);
1833                         }
1834                         break;
1835                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1836                         if (title) {
1837                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1838                                                        ev_link_action_get_filename (action));
1839                         } else {
1840                                 msg = g_strdup_printf (_("Go to file “%s”"),
1841                                                        ev_link_action_get_filename (action));
1842                         }
1843                         break;
1844                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1845                         msg = g_strdup (ev_link_action_get_uri (action));
1846                         break;
1847                 case EV_LINK_ACTION_TYPE_LAUNCH:
1848                         msg = g_strdup_printf (_("Launch %s"),
1849                                                ev_link_action_get_filename (action));
1850                         break;
1851                 case EV_LINK_ACTION_TYPE_NAMED:
1852                         msg = tip_from_action_named (action);
1853                         break;
1854                 default:
1855                         if (title)
1856                                 msg = g_strdup (title);
1857                         break;
1858         }
1859
1860         return msg;
1861 }
1862
1863 static void
1864 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1865 {
1866         EvLink       *link;
1867         EvFormField  *field;
1868         EvAnnotation *annot = NULL;
1869
1870         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1871                 return;
1872
1873         if (view->adding_annot) {
1874                 if (view->cursor != EV_VIEW_CURSOR_ADD)
1875                         ev_view_set_cursor (view, EV_VIEW_CURSOR_ADD);
1876                 return;
1877         }
1878
1879         if (view->drag_info.in_drag) {
1880                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1881                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1882                 return;
1883         }
1884
1885         if (view->scroll_info.autoscrolling) {
1886                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1887                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1888                 return;
1889         }
1890
1891         link = ev_view_get_link_at_location (view, x, y);
1892         if (link) {
1893                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1894         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1895                 if (field->is_read_only) {
1896                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1897                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1898                             view->cursor == EV_VIEW_CURSOR_DRAG)
1899                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1900                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1901                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1902                 } else {
1903                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1904                 }
1905         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1906                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1907         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1908                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1909         } else {
1910                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1911                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1912                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1913                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL ||
1914                     view->cursor == EV_VIEW_CURSOR_ADD)
1915                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1916         }
1917
1918         if (link || annot)
1919                 g_object_set (view, "has-tooltip", TRUE, NULL);
1920 }
1921
1922 /*** Images ***/
1923 static EvImage *
1924 ev_view_get_image_at_location (EvView  *view,
1925                                gdouble  x,
1926                                gdouble  y)
1927 {
1928         gint page = -1;
1929         gint x_new = 0, y_new = 0;
1930         EvMappingList *image_mapping;
1931
1932         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1933                 return NULL;
1934
1935         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1936                 return NULL;
1937
1938         image_mapping = ev_page_cache_get_image_mapping (view->page_cache, page);
1939
1940         if (image_mapping)
1941                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1942         else
1943                 return NULL;
1944 }
1945
1946 /*** Forms ***/
1947 static EvFormField *
1948 ev_view_get_form_field_at_location (EvView  *view,
1949                                     gdouble  x,
1950                                     gdouble  y)
1951 {
1952         gint page = -1;
1953         gint x_new = 0, y_new = 0;
1954         EvMappingList *forms_mapping;
1955
1956         if (!EV_IS_DOCUMENT_FORMS (view->document))
1957                 return NULL;
1958
1959         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1960                 return NULL;
1961
1962         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache, page);
1963
1964         if (forms_mapping)
1965                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1966         else
1967                 return NULL;
1968 }
1969
1970 static cairo_region_t *
1971 ev_view_form_field_get_region (EvView      *view,
1972                                EvFormField *field)
1973 {
1974         GdkRectangle   view_area;
1975         EvMappingList *forms_mapping;
1976
1977         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
1978                                                               field->page->index);
1979         ev_view_get_area_from_mapping (view, field->page->index,
1980                                        forms_mapping,
1981                                        field, &view_area);
1982
1983         return cairo_region_create_rectangle (&view_area);
1984 }
1985
1986 static gboolean
1987 ev_view_forms_remove_widgets (EvView *view)
1988 {
1989         ev_view_remove_all (view);
1990
1991         return FALSE;
1992 }
1993
1994 static void
1995 ev_view_form_field_destroy (GtkWidget *widget,
1996                             EvView    *view)
1997 {
1998         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1999 }
2000
2001 static GtkWidget *
2002 ev_view_form_field_button_create_widget (EvView      *view,
2003                                          EvFormField *field)
2004 {
2005         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
2006         cairo_region_t    *field_region = NULL;
2007
2008         switch (field_button->type) {
2009                 case EV_FORM_FIELD_BUTTON_PUSH:
2010                         return NULL;
2011                 case EV_FORM_FIELD_BUTTON_CHECK:
2012                 case EV_FORM_FIELD_BUTTON_RADIO: {
2013                         gboolean       state;
2014                         EvMappingList *forms_mapping;
2015                         GList         *l;
2016
2017                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
2018                                                                                field);
2019
2020                         /* FIXME: it actually depends on NoToggleToOff flags */
2021                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
2022                             state && field_button->state)
2023                                 return NULL;
2024
2025                         field_region = ev_view_form_field_get_region (view, field);
2026
2027                         /* For radio buttons and checkbox buttons that are in a set
2028                          * we need to update also the region for the current selected item
2029                          */
2030                         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2031                                                                               field->page->index);
2032                         for (l = ev_mapping_list_get_list (forms_mapping); l; l = g_list_next (l)) {
2033                                 EvFormField *button = ((EvMapping *)(l->data))->data;
2034                                 cairo_region_t *button_region;
2035
2036                                 if (button->id == field->id)
2037                                         continue;
2038
2039                                 /* FIXME: only buttons in the same group should be updated */
2040                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
2041                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
2042                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
2043                                         continue;
2044
2045                                 button_region = ev_view_form_field_get_region (view, button);
2046                                 cairo_region_union (field_region, button_region);
2047                                 cairo_region_destroy (button_region);
2048                         }
2049
2050                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
2051                                                                        field, !state);
2052                         field_button->state = !state;
2053                 }
2054                         break;
2055         }
2056
2057         ev_view_reload_page (view, field->page->index, field_region);
2058         cairo_region_destroy (field_region);
2059
2060         return NULL;
2061 }
2062
2063 static void
2064 ev_view_form_field_text_save (EvView    *view,
2065                               GtkWidget *widget)
2066 {
2067         EvFormField *field;
2068
2069         if (!view->document)
2070                 return;
2071
2072         field = g_object_get_data (G_OBJECT (widget), "form-field");
2073
2074         if (field->changed) {
2075                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2076                 cairo_region_t  *field_region;
2077
2078                 field_region = ev_view_form_field_get_region (view, field);
2079
2080                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
2081                                                             field, field_text->text);
2082                 field->changed = FALSE;
2083                 ev_view_reload_page (view, field->page->index, field_region);
2084                 cairo_region_destroy (field_region);
2085         }
2086 }
2087
2088 static void
2089 ev_view_form_field_text_changed (GtkWidget   *widget,
2090                                  EvFormField *field)
2091 {
2092         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2093         gchar           *text = NULL;
2094
2095         if (GTK_IS_ENTRY (widget)) {
2096                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
2097         } else if (GTK_IS_TEXT_BUFFER (widget)) {
2098                 GtkTextIter start, end;
2099
2100                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
2101                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
2102                                                  &start, &end, FALSE);
2103         }
2104
2105         if (!field_text->text ||
2106             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
2107                 g_free (field_text->text);
2108                 field_text->text = text;
2109                 field->changed = TRUE;
2110         }
2111 }
2112
2113 static GtkWidget *
2114 ev_view_form_field_text_create_widget (EvView      *view,
2115                                        EvFormField *field)
2116 {
2117         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2118         GtkWidget       *text = NULL;
2119         gchar           *txt;
2120
2121         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2122                                                           field);
2123
2124         switch (field_text->type) {
2125                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2126                         /* TODO */
2127                 case EV_FORM_FIELD_TEXT_NORMAL:
2128                         text = gtk_entry_new ();
2129                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2130                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2131                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2132
2133                         if (txt) {
2134                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2135                                 g_free (txt);
2136                         }
2137
2138                         g_signal_connect (text, "changed",
2139                                           G_CALLBACK (ev_view_form_field_text_changed),
2140                                           field);
2141                         g_signal_connect_after (text, "activate",
2142                                                 G_CALLBACK (ev_view_form_field_destroy),
2143                                                 view);
2144                         break;
2145                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2146                         GtkTextBuffer *buffer;
2147
2148                         text = gtk_text_view_new ();
2149                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2150
2151                         if (txt) {
2152                                 gtk_text_buffer_set_text (buffer, txt, -1);
2153                                 g_free (txt);
2154                         }
2155
2156                         g_signal_connect (buffer, "changed",
2157                                           G_CALLBACK (ev_view_form_field_text_changed),
2158                                           field);
2159                 }
2160                         break;
2161         }
2162
2163         g_object_weak_ref (G_OBJECT (text),
2164                            (GWeakNotify)ev_view_form_field_text_save,
2165                            view);
2166
2167         return text;
2168 }
2169
2170 static void
2171 ev_view_form_field_choice_save (EvView    *view,
2172                                 GtkWidget *widget)
2173 {
2174         EvFormField *field;
2175
2176         if (!view->document)
2177                 return;
2178
2179         field = g_object_get_data (G_OBJECT (widget), "form-field");
2180
2181         if (field->changed) {
2182                 GList             *l;
2183                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2184                 cairo_region_t    *field_region;
2185
2186                 field_region = ev_view_form_field_get_region (view, field);
2187
2188                 if (field_choice->is_editable) {
2189                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2190                                                                       field, field_choice->text);
2191                 } else {
2192                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2193                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2194                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2195                                                                                  field,
2196                                                                                  GPOINTER_TO_INT (l->data));
2197                         }
2198                 }
2199                 field->changed = FALSE;
2200                 ev_view_reload_page (view, field->page->index, field_region);
2201                 cairo_region_destroy (field_region);
2202         }
2203 }
2204
2205 static void
2206 ev_view_form_field_choice_changed (GtkWidget   *widget,
2207                                    EvFormField *field)
2208 {
2209         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2210
2211         if (GTK_IS_COMBO_BOX (widget)) {
2212                 gint item;
2213
2214                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2215                 if (!field_choice->selected_items ||
2216                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2217                         g_list_free (field_choice->selected_items);
2218                         field_choice->selected_items = NULL;
2219                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2220                                                                        GINT_TO_POINTER (item));
2221                         field->changed = TRUE;
2222                 }
2223
2224                 if (gtk_combo_box_get_has_entry (GTK_COMBO_BOX (widget))) {
2225                         const gchar *text;
2226
2227                         text = gtk_entry_get_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (widget))));
2228                         if (!field_choice->text ||
2229                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2230                                 g_free (field_choice->text);
2231                                 field_choice->text = g_strdup (text);
2232                                 field->changed = TRUE;
2233                         }
2234                 }
2235         } else if (GTK_IS_TREE_SELECTION (widget)) {
2236                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2237                 GtkTreeModel     *model;
2238                 GList            *items, *l;
2239
2240                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2241                 g_list_free (field_choice->selected_items);
2242                 field_choice->selected_items = NULL;
2243
2244                 for (l = items; l && l->data; l = g_list_next (l)) {
2245                         GtkTreeIter  iter;
2246                         GtkTreePath *path = (GtkTreePath *)l->data;
2247                         gint         item;
2248
2249                         gtk_tree_model_get_iter (model, &iter, path);
2250                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2251
2252                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2253                                                                        GINT_TO_POINTER (item));
2254
2255                         gtk_tree_path_free (path);
2256                 }
2257
2258                 g_list_free (items);
2259
2260                 field->changed = TRUE;
2261         }
2262 }
2263
2264 static GtkWidget *
2265 ev_view_form_field_choice_create_widget (EvView      *view,
2266                                          EvFormField *field)
2267 {
2268         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2269         GtkWidget         *choice;
2270         GtkTreeModel      *model;
2271         gint               n_items, i;
2272         gint               selected_item = 0;
2273
2274         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2275                                                                    field);
2276         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2277         for (i = 0; i < n_items; i++) {
2278                 GtkTreeIter iter;
2279                 gchar      *item;
2280
2281                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2282                                                                      field, i);
2283                 if (ev_document_forms_form_field_choice_is_item_selected (
2284                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2285                         selected_item = i;
2286                         /* FIXME: we need a get_selected_items function in poppler */
2287                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2288                                                                        GINT_TO_POINTER (i));
2289                 }
2290
2291                 if (item) {
2292                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2293                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2294                                             0, item,
2295                                             1, i,
2296                                             -1);
2297                         g_free (item);
2298                 }
2299         }
2300
2301         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2302                 GtkCellRenderer  *renderer;
2303                 GtkWidget        *tree_view;
2304                 GtkTreeSelection *selection;
2305
2306                 tree_view = gtk_tree_view_new_with_model (model);
2307                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2308
2309                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2310                 if (field_choice->multi_select) {
2311                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2312                 }
2313
2314                 /* TODO: set selected items */
2315
2316                 renderer = gtk_cell_renderer_text_new ();
2317                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2318                                                              0,
2319                                                              "choix", renderer,
2320                                                              "text", 0,
2321                                                              NULL);
2322
2323                 choice = gtk_scrolled_window_new (NULL, NULL);
2324                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2325                                                 GTK_POLICY_AUTOMATIC,
2326                                                 GTK_POLICY_AUTOMATIC);
2327                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2328                 gtk_widget_show (tree_view);
2329
2330                 g_signal_connect (selection, "changed",
2331                                   G_CALLBACK (ev_view_form_field_choice_changed),
2332                                   field);
2333                 g_signal_connect_after (selection, "changed",
2334                                         G_CALLBACK (ev_view_form_field_destroy),
2335                                         view);
2336         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2337                 gchar *text;
2338
2339                 /* FIXME once gtk bug 633050 is fixed */
2340                 choice = g_object_new (GTK_TYPE_COMBO_BOX, "has-entry", TRUE, "model", model, NULL);
2341
2342                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2343                 if (text) {
2344                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2345                         g_free (text);
2346                 }
2347
2348                 g_signal_connect (choice, "changed",
2349                                   G_CALLBACK (ev_view_form_field_choice_changed),
2350                                   field);
2351                 g_signal_connect_after (gtk_bin_get_child (GTK_BIN (choice)),
2352                                         "activate",
2353                                         G_CALLBACK (ev_view_form_field_destroy),
2354                                         view);
2355         } else { /* ComboBoxText */
2356                 GtkCellRenderer *renderer;
2357
2358                 choice = gtk_combo_box_new_with_model (model);
2359                 renderer = gtk_cell_renderer_text_new ();
2360                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2361                                             renderer, TRUE);
2362                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2363                                                 renderer,
2364                                                 "text", 0,
2365                                                 NULL);
2366                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2367                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2368
2369                 g_signal_connect (choice, "changed",
2370                                   G_CALLBACK (ev_view_form_field_choice_changed),
2371                                   field);
2372                 g_signal_connect_after (choice, "changed",
2373                                         G_CALLBACK (ev_view_form_field_destroy),
2374                                         view);
2375         }
2376
2377         g_object_unref (model);
2378
2379         g_object_weak_ref (G_OBJECT (choice),
2380                            (GWeakNotify)ev_view_form_field_choice_save,
2381                            view);
2382
2383         return choice;
2384 }
2385
2386 static void
2387 ev_view_handle_form_field (EvView      *view,
2388                            EvFormField *field,
2389                            gdouble      x,
2390                            gdouble      y)
2391 {
2392         GtkWidget     *field_widget = NULL;
2393         EvMappingList *form_field_mapping;
2394         GdkRectangle   view_area;
2395
2396         if (field->is_read_only)
2397                 return;
2398
2399         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2400                 field_widget = ev_view_form_field_button_create_widget (view, field);
2401         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2402                 field_widget = ev_view_form_field_text_create_widget (view, field);
2403         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2404                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2405         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2406                 /* TODO */
2407         }
2408
2409         /* Form field doesn't require a widget */
2410         if (!field_widget)
2411                 return;
2412
2413         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2414                                 g_object_ref (field),
2415                                 (GDestroyNotify)g_object_unref);
2416
2417         form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2418                                                                    field->page->index);
2419         ev_view_get_area_from_mapping (view, field->page->index,
2420                                        form_field_mapping,
2421                                        field, &view_area);
2422
2423         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2424         gtk_widget_show (field_widget);
2425         gtk_widget_grab_focus (field_widget);
2426 }
2427
2428 /* Annotations */
2429 static EvViewWindowChild *
2430 ev_view_get_window_child (EvView    *view,
2431                           GtkWidget *window)
2432 {
2433         GList *children = view->window_children;
2434
2435         while (children) {
2436                 EvViewWindowChild *child;
2437
2438                 child = (EvViewWindowChild *)children->data;
2439                 children = children->next;
2440
2441                 if (child->window == window)
2442                         return child;
2443         }
2444
2445         return NULL;
2446 }
2447
2448 static void
2449 ev_view_window_child_move (EvView            *view,
2450                            EvViewWindowChild *child,
2451                            gint               x,
2452                            gint               y)
2453 {
2454         GtkAllocation allocation;
2455         gint          width, height;
2456
2457         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
2458         gtk_window_get_size (GTK_WINDOW (child->window), &width, &height);
2459
2460         child->x = x;
2461         child->y = y;
2462         gtk_window_move (GTK_WINDOW (child->window),
2463                          CLAMP (x, child->parent_x,
2464                                 child->parent_x + allocation.width - width),
2465                          CLAMP (y, child->parent_y,
2466                                 child->parent_y + allocation.height - height));
2467 }
2468
2469 static void
2470 ev_view_window_child_move_with_parent (EvView    *view,
2471                                        GtkWidget *window)
2472 {
2473         EvViewWindowChild *child;
2474         gint               root_x, root_y;
2475
2476         child = ev_view_get_window_child (view, window);
2477         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2478                                &root_x, &root_y);
2479         if (root_x != child->parent_x || root_y != child->parent_y) {
2480                 gint dest_x, dest_y;
2481
2482                 dest_x = child->x + (root_x - child->parent_x);
2483                 dest_y = child->y + (root_y - child->parent_y);
2484                 child->parent_x = root_x;
2485                 child->parent_y = root_y;
2486                 ev_view_window_child_move (view, child, dest_x, dest_y);
2487         }
2488
2489         if (child->visible && !gtk_widget_get_visible (window))
2490                 gtk_widget_show (window);
2491 }
2492
2493 static void
2494 ev_view_window_child_put (EvView    *view,
2495                           GtkWidget *window,
2496                           guint      page,
2497                           gint       x,
2498                           gint       y,
2499                           gdouble    orig_x,
2500                           gdouble    orig_y)
2501 {
2502         EvViewWindowChild *child;
2503         gint               root_x, root_y;
2504
2505         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2506                                &root_x, &root_y);
2507
2508         child = g_new0 (EvViewWindowChild, 1);
2509         child->window = window;
2510         child->page = page;
2511         child->orig_x = orig_x;
2512         child->orig_y = orig_y;
2513         child->parent_x = root_x;
2514         child->parent_y = root_y;
2515         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2516         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2517
2518         if (child->visible)
2519                 gtk_widget_show (window);
2520         else
2521                 gtk_widget_hide (window);
2522
2523         view->window_children = g_list_append (view->window_children, child);
2524 }
2525
2526 static EvViewWindowChild *
2527 ev_view_find_window_child_for_annot (EvView       *view,
2528                                      guint         page,
2529                                      EvAnnotation *annot)
2530 {
2531         GList *children = view->window_children;
2532
2533         while (children) {
2534                 EvViewWindowChild *child;
2535                 EvAnnotation      *wannot;
2536
2537                 child = (EvViewWindowChild *)children->data;
2538                 children = children->next;
2539
2540                 if (child->page != page)
2541                         continue;
2542
2543                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2544                 if (ev_annotation_equal (wannot, annot))
2545                         return child;
2546         }
2547
2548         return NULL;
2549 }
2550
2551 static void
2552 ev_view_window_children_free (EvView *view)
2553 {
2554         GList *l;
2555
2556         if (!view->window_children)
2557                 return;
2558
2559         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2560                 EvViewWindowChild *child;
2561
2562                 child = (EvViewWindowChild *)l->data;
2563                 gtk_widget_destroy (GTK_WIDGET (child->window));
2564                 g_free (child);
2565         }
2566         g_list_free (view->window_children);
2567         view->window_children = NULL;
2568         view->window_child_focus = NULL;
2569 }
2570
2571 static void
2572 annotation_window_grab_focus (GtkWidget *widget,
2573                               EvView    *view)
2574 {
2575         if (view->window_child_focus)
2576                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2577         view->window_child_focus = ev_view_get_window_child (view, widget);
2578 }
2579
2580 static void
2581 annotation_window_closed (EvAnnotationWindow *window,
2582                           EvView             *view)
2583 {
2584         EvViewWindowChild *child;
2585
2586         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2587         child->visible = FALSE;
2588 }
2589
2590 static void
2591 annotation_window_moved (EvAnnotationWindow *window,
2592                          gint                x,
2593                          gint                y,
2594                          EvView             *view)
2595 {
2596         EvViewWindowChild *child;
2597         GdkRectangle       page_area;
2598         GtkBorder          border;
2599         GdkRectangle       view_rect;
2600         EvRectangle        doc_rect;
2601         gint               width, height;
2602
2603         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2604         if (child->x == x && child->y == y)
2605                 return;
2606
2607         child->moved = TRUE;
2608         child->x = x;
2609         child->y = y;
2610
2611         /* Window has been moved by the user,
2612          * we have to set a new origin in doc coords
2613          */
2614         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2615         view_rect.x = (x - child->parent_x) + view->scroll_x;
2616         view_rect.y = (y - child->parent_y) + view->scroll_y;
2617         view_rect.width = width;
2618         view_rect.height = height;
2619
2620         ev_view_get_page_extents (view, child->page, &page_area, &border);
2621         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2622         child->orig_x = doc_rect.x1;
2623         child->orig_y = doc_rect.y1;
2624 }
2625
2626 static void
2627 ev_view_annotation_save_contents (EvView       *view,
2628                                   GParamSpec   *pspec,
2629                                   EvAnnotation *annot)
2630 {
2631         if (!view->document)
2632                 return;
2633
2634         ev_document_doc_mutex_lock ();
2635         ev_document_annotations_save_annotation (EV_DOCUMENT_ANNOTATIONS (view->document),
2636                                                  annot, EV_ANNOTATIONS_SAVE_CONTENTS);
2637         ev_document_doc_mutex_unlock ();
2638 }
2639
2640 static GtkWidget *
2641 ev_view_create_annotation_window (EvView       *view,
2642                                   EvAnnotation *annot,
2643                                   GtkWindow    *parent)
2644 {
2645         GtkWidget   *window;
2646         EvRectangle  doc_rect;
2647         GdkRectangle view_rect;
2648         guint        page;
2649
2650         window = ev_annotation_window_new (annot, parent);
2651         g_signal_connect (window, "grab_focus",
2652                           G_CALLBACK (annotation_window_grab_focus),
2653                           view);
2654         g_signal_connect (window, "closed",
2655                           G_CALLBACK (annotation_window_closed),
2656                           view);
2657         g_signal_connect (window, "moved",
2658                           G_CALLBACK (annotation_window_moved),
2659                           view);
2660         g_signal_connect_swapped (annot, "notify::contents",
2661                                   G_CALLBACK (ev_view_annotation_save_contents),
2662                                   view);
2663         g_object_set_data (G_OBJECT (annot), "popup", window);
2664
2665         page = ev_annotation_get_page_index (annot);
2666         ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window), &doc_rect);
2667         doc_rect_to_view_rect (view, page, &doc_rect, &view_rect);
2668         view_rect.x -= view->scroll_x;
2669         view_rect.y -= view->scroll_y;
2670
2671         ev_view_window_child_put (view, window, page,
2672                                   view_rect.x, view_rect.y,
2673                                   doc_rect.x1, doc_rect.y1);
2674
2675         return window;
2676 }
2677
2678 static void
2679 show_annotation_windows (EvView *view,
2680                          gint    page)
2681 {
2682         EvMappingList *annots;
2683         GList         *l;
2684         GtkWindow     *parent;
2685
2686         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2687
2688         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2689
2690         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2691                 EvAnnotation      *annot;
2692                 EvViewWindowChild *child;
2693                 GtkWidget         *window;
2694
2695                 annot = ((EvMapping *)(l->data))->data;
2696
2697                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2698                         continue;
2699
2700                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2701                         continue;
2702
2703                 window = g_object_get_data (G_OBJECT (annot), "popup");
2704                 if (window) {
2705                         ev_view_window_child_move_with_parent (view, window);
2706                         continue;
2707                 }
2708
2709                 /* Look if we already have a popup for this annot */
2710                 child = ev_view_find_window_child_for_annot (view, page, annot);
2711                 window = child ? child->window : NULL;
2712                 if (window) {
2713                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2714                         g_object_set_data (G_OBJECT (annot), "popup", window);
2715                         ev_view_window_child_move_with_parent (view, window);
2716                 } else {
2717                         ev_view_create_annotation_window (view, annot, parent);
2718                 }
2719         }
2720 }
2721
2722 static void
2723 hide_annotation_windows (EvView *view,
2724                          gint    page)
2725 {
2726         EvMappingList *annots;
2727         GList         *l;
2728
2729         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2730
2731         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2732                 EvAnnotation *annot;
2733                 GtkWidget    *window;
2734
2735                 annot = ((EvMapping *)(l->data))->data;
2736
2737                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2738                         continue;
2739
2740                 window = g_object_get_data (G_OBJECT (annot), "popup");
2741                 if (window)
2742                         gtk_widget_hide (window);
2743         }
2744 }
2745
2746 static EvAnnotation *
2747 ev_view_get_annotation_at_location (EvView  *view,
2748                                     gdouble  x,
2749                                     gdouble  y)
2750 {
2751         gint page = -1;
2752         gint x_new = 0, y_new = 0;
2753         EvMappingList *annotations_mapping;
2754
2755         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2756                 return NULL;
2757
2758         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2759                 return NULL;
2760
2761         annotations_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
2762
2763         if (annotations_mapping)
2764                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2765         else
2766                 return NULL;
2767 }
2768
2769 static void
2770 ev_view_annotation_show_popup_window (EvView    *view,
2771                                       GtkWidget *window)
2772 {
2773         EvViewWindowChild *child;
2774
2775         if (!window)
2776                 return;
2777
2778         child = ev_view_get_window_child (view, window);
2779         if (!child->visible) {
2780                 child->visible = TRUE;
2781                 ev_view_window_child_move (view, child, child->x, child->y);
2782                 gtk_widget_show (window);
2783         }
2784 }
2785
2786 static void
2787 ev_view_handle_annotation (EvView       *view,
2788                            EvAnnotation *annot,
2789                            gdouble       x,
2790                            gdouble       y,
2791                            guint32       timestamp)
2792 {
2793         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2794                 GtkWidget *window;
2795
2796                 window = g_object_get_data (G_OBJECT (annot), "popup");
2797                 ev_view_annotation_show_popup_window (view, window);
2798         }
2799
2800         if (EV_IS_ANNOTATION_ATTACHMENT (annot)) {
2801                 EvAttachment *attachment;
2802
2803                 attachment = ev_annotation_attachment_get_attachment (EV_ANNOTATION_ATTACHMENT (annot));
2804                 if (attachment) {
2805                         GError *error = NULL;
2806
2807                         ev_attachment_open (attachment,
2808                                             gtk_widget_get_screen (GTK_WIDGET (view)),
2809                                             timestamp,
2810                                             &error);
2811
2812                         if (error) {
2813                                 g_warning ("%s", error->message);
2814                                 g_error_free (error);
2815                         }
2816                 }
2817         }
2818 }
2819
2820 static void
2821 ev_view_create_annotation (EvView          *view,
2822                            EvAnnotationType annot_type,
2823                            gint             x,
2824                            gint             y)
2825 {
2826         EvAnnotation   *annot;
2827         GdkPoint        point;
2828         GdkRectangle    page_area;
2829         GtkBorder       border;
2830         EvRectangle     doc_rect, popup_rect;
2831         EvPage         *page;
2832         GdkColor        color = { 0, 65535, 65535, 0 };
2833         GdkRectangle    view_rect;
2834         cairo_region_t *region;
2835
2836         point.x = x;
2837         point.y = y;
2838         ev_view_get_page_extents (view, view->current_page, &page_area, &border);
2839         view_point_to_doc_point (view, &point, &page_area,
2840                                  &doc_rect.x1, &doc_rect.y1);
2841         doc_rect.x2 = doc_rect.x1 + 24;
2842         doc_rect.y2 = doc_rect.y1 + 24;
2843
2844         ev_document_doc_mutex_lock ();
2845         page = ev_document_get_page (view->document, view->current_page);
2846         switch (annot_type) {
2847         case EV_ANNOTATION_TYPE_TEXT:
2848                 annot = ev_annotation_text_new (page);
2849                 break;
2850         case EV_ANNOTATION_TYPE_ATTACHMENT:
2851                 /* TODO */
2852                 g_object_unref (page);
2853                 ev_document_doc_mutex_unlock ();
2854                 return;
2855         default:
2856                 g_assert_not_reached ();
2857         }
2858         g_object_unref (page);
2859
2860         ev_annotation_set_color (annot, &color);
2861
2862         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2863                 popup_rect.x1 = doc_rect.x2;
2864                 popup_rect.x2 = popup_rect.x1 + 200;
2865                 popup_rect.y1 = doc_rect.y2;
2866                 popup_rect.y2 = popup_rect.y1 + 150;
2867                 g_object_set (annot,
2868                               "rectangle", &popup_rect,
2869                               "has_popup", TRUE,
2870                               "popup_is_open", FALSE,
2871                               "label", g_get_real_name (),
2872                               "opacity", 1.0,
2873                               NULL);
2874         }
2875         ev_document_annotations_add_annotation (EV_DOCUMENT_ANNOTATIONS (view->document),
2876                                                 annot, &doc_rect);
2877         ev_document_doc_mutex_unlock ();
2878
2879         /* If the page didn't have annots, mark the cache as dirty */
2880         if (!ev_page_cache_get_annot_mapping (view->page_cache, view->current_page))
2881                 ev_page_cache_mark_dirty (view->page_cache, view->current_page);
2882
2883         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2884                 GtkWindow *parent;
2885                 GtkWidget *window;
2886
2887                 parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2888                 window = ev_view_create_annotation_window (view, annot, parent);
2889
2890                 /* Show the annot window the first time */
2891                 ev_view_annotation_show_popup_window (view, window);
2892         }
2893
2894         doc_rect_to_view_rect (view, view->current_page, &doc_rect, &view_rect);
2895         view_rect.x -= view->scroll_x;
2896         view_rect.y -= view->scroll_y;
2897         region = cairo_region_create_rectangle (&view_rect);
2898         ev_view_reload_page (view, view->current_page, region);
2899         cairo_region_destroy (region);
2900
2901         g_signal_emit (view, signals[SIGNAL_ANNOT_ADDED], 0, annot);
2902 }
2903
2904 void
2905 ev_view_focus_annotation (EvView    *view,
2906                           EvMapping *annot_mapping)
2907 {
2908         GdkRectangle  view_rect;
2909         EvAnnotation *annot;
2910         guint         page;
2911
2912         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2913                 return;
2914
2915         if (view->focus_annotation == annot_mapping)
2916                 return;
2917
2918         view->focus_annotation = annot_mapping;
2919         annot = (EvAnnotation *)annot_mapping->data;
2920
2921         page = ev_annotation_get_page_index (annot);
2922         ev_document_model_set_page (view->model, page);
2923
2924         doc_rect_to_view_rect (view, page,
2925                                &annot_mapping->area, &view_rect);
2926         ensure_rectangle_is_visible (view, &view_rect);
2927         gtk_widget_queue_draw (GTK_WIDGET (view));
2928 }
2929
2930 void
2931 ev_view_begin_add_annotation (EvView          *view,
2932                               EvAnnotationType annot_type)
2933 {
2934         if (annot_type == EV_ANNOTATION_TYPE_UNKNOWN)
2935                 return;
2936
2937         if (view->adding_annot)
2938                 return;
2939
2940         view->adding_annot = TRUE;
2941         view->adding_annot_type = annot_type;
2942         ev_view_set_cursor (view, EV_VIEW_CURSOR_ADD);
2943 }
2944
2945 void
2946 ev_view_cancel_add_annotation (EvView *view)
2947 {
2948         gint x, y;
2949
2950         if (!view->adding_annot)
2951                 return;
2952
2953         view->adding_annot = FALSE;
2954         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
2955         ev_view_handle_cursor_over_xy (view, x, y);
2956 }
2957
2958 static gboolean
2959 ev_view_synctex_backward_search (EvView *view,
2960                                  gdouble x,
2961                                  gdouble y)
2962 {
2963         gint page = -1;
2964         gint x_new = 0, y_new = 0;
2965         EvSourceLink *link;
2966
2967         if (!ev_document_has_synctex (view->document))
2968                 return FALSE;
2969
2970         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2971                 return FALSE;
2972
2973         link = ev_document_synctex_backward_search (view->document, page, x_new, y_new);
2974         if (link) {
2975                 g_signal_emit (view, signals[SIGNAL_SYNC_SOURCE], 0, link);
2976                 g_free (link);
2977
2978                 return TRUE;
2979         }
2980
2981         return FALSE;
2982 }
2983
2984 /*** GtkWidget implementation ***/
2985
2986 static void
2987 ev_view_size_request_continuous_dual_page (EvView         *view,
2988                                            GtkRequisition *requisition)
2989 {
2990         gint n_pages;
2991
2992         n_pages = ev_document_get_n_pages (view->document) + 1;
2993         get_page_y_offset (view, n_pages, &requisition->height);
2994
2995         switch (view->sizing_mode) {
2996                 case EV_SIZING_FIT_WIDTH:
2997                 case EV_SIZING_BEST_FIT:
2998                         requisition->width = 1;
2999
3000                         break;
3001                 case EV_SIZING_FREE: {
3002                         gint max_width;
3003                         GtkBorder border;
3004
3005                         ev_view_get_max_page_size (view, &max_width, NULL);
3006                         compute_border (view, max_width, max_width, &border);
3007                         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
3008                 }
3009                         break;
3010                 default:
3011                         g_assert_not_reached ();
3012         }
3013 }
3014
3015 static void
3016 ev_view_size_request_continuous (EvView         *view,
3017                                  GtkRequisition *requisition)
3018 {
3019         gint n_pages;
3020
3021         n_pages = ev_document_get_n_pages (view->document);
3022         get_page_y_offset (view, n_pages, &requisition->height);
3023
3024         switch (view->sizing_mode) {
3025                 case EV_SIZING_FIT_WIDTH:
3026                 case EV_SIZING_BEST_FIT:
3027                         requisition->width = 1;
3028
3029                         break;
3030                 case EV_SIZING_FREE: {
3031                         gint max_width;
3032                         GtkBorder border;
3033
3034                         ev_view_get_max_page_size (view, &max_width, NULL);
3035                         compute_border (view, max_width, max_width, &border);
3036                         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
3037                 }
3038                         break;
3039                 default:
3040                         g_assert_not_reached ();
3041         }
3042 }
3043
3044 static void
3045 ev_view_size_request_dual_page (EvView         *view,
3046                                 GtkRequisition *requisition)
3047 {
3048         GtkBorder border;
3049         gint width, height;
3050
3051         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
3052                 requisition->width = 1;
3053                 requisition->height = 1;
3054
3055                 return;
3056         }
3057
3058         /* Find the largest of the two. */
3059         ev_view_get_page_size (view,
3060                                view->current_page,
3061                                &width, &height);
3062         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
3063                 gint width_2, height_2;
3064                 ev_view_get_page_size (view,
3065                                        view->current_page + 1,
3066                                        &width_2, &height_2);
3067                 if (width_2 > width) {
3068                         width = width_2;
3069                         height = height_2;
3070                 }
3071         }
3072         compute_border (view, width, height, &border);
3073
3074         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
3075                 ((width + border.left + border.right) * 2) + (view->spacing * 3);
3076         requisition->height = (height + border.top + border.bottom) + (view->spacing * 2);
3077 }
3078
3079 static void
3080 ev_view_size_request_single_page (EvView         *view,
3081                                   GtkRequisition *requisition)
3082 {
3083         GtkBorder border;
3084         gint width, height;
3085
3086         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
3087                 requisition->width = 1;
3088                 requisition->height = 1;
3089
3090                 return;
3091         }
3092
3093         ev_view_get_page_size (view, view->current_page, &width, &height);
3094         compute_border (view, width, height, &border);
3095
3096         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
3097                 width + border.left + border.right + (2 * view->spacing);
3098         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
3099 }
3100
3101 static void
3102 ev_view_size_request (GtkWidget      *widget,
3103                       GtkRequisition *requisition)
3104 {
3105         EvView *view = EV_VIEW (widget);
3106
3107         if (view->document == NULL) {
3108                 view->requisition.width = 1;
3109                 view->requisition.height = 1;
3110
3111                 *requisition = view->requisition;
3112
3113                 return;
3114         }
3115
3116         /* Get zoom for size here when not called from
3117          * ev_view_size_allocate()
3118          */
3119         if (!view->internal_size_request &&
3120             (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3121              view->sizing_mode == EV_SIZING_BEST_FIT)) {
3122                 GtkAllocation allocation;
3123
3124                 gtk_widget_get_allocation (widget, &allocation);
3125                 ev_view_zoom_for_size (view,
3126                                        allocation.width,
3127                                        allocation.height);
3128         }
3129
3130         if (view->continuous && view->dual_page)
3131                 ev_view_size_request_continuous_dual_page (view, &view->requisition);
3132         else if (view->continuous)
3133                 ev_view_size_request_continuous (view, &view->requisition);
3134         else if (view->dual_page)
3135                 ev_view_size_request_dual_page (view, &view->requisition);
3136         else
3137                 ev_view_size_request_single_page (view, &view->requisition);
3138
3139         *requisition = view->requisition;
3140 }
3141
3142 static void
3143 ev_view_size_allocate (GtkWidget      *widget,
3144                        GtkAllocation  *allocation)
3145 {
3146         EvView *view = EV_VIEW (widget);
3147         GList  *children, *l;
3148         gint    root_x, root_y;
3149
3150         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
3151
3152         if (!view->document)
3153                 return;
3154
3155         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3156             view->sizing_mode == EV_SIZING_BEST_FIT) {
3157                 GtkRequisition req;
3158
3159                 ev_view_zoom_for_size (view,
3160                                        allocation->width,
3161                                        allocation->height);
3162                 view->internal_size_request = TRUE;
3163                 ev_view_size_request (widget, &req);
3164                 view->internal_size_request = FALSE;
3165         }
3166
3167         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
3168         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
3169
3170         if (view->document)
3171                 view_update_range_and_current_page (view);
3172
3173         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
3174         view->pending_resize = FALSE;
3175         view->pending_point.x = 0;
3176         view->pending_point.y = 0;
3177
3178         children = gtk_container_get_children (GTK_CONTAINER (widget));
3179         for (l = children; l && l->data; l = g_list_next (l)) {
3180                 EvFormField   *field;
3181                 GdkRectangle   view_area;
3182                 EvMappingList *form_field_mapping;
3183                 GtkAllocation  child_allocation;
3184                 GtkRequisition child_requisition;
3185                 GtkWidget     *child = (GtkWidget *)l->data;
3186
3187                 field = g_object_get_data (G_OBJECT (child), "form-field");
3188                 if (!field)
3189                         continue;
3190
3191                 form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
3192                                                                            field->page->index);
3193                 ev_view_get_area_from_mapping (view, field->page->index,
3194                                                form_field_mapping,
3195                                                field, &view_area);
3196
3197                 gtk_widget_size_request (child, &child_requisition);
3198                 if (child_requisition.width != view_area.width ||
3199                     child_requisition.height != view_area.height)
3200                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
3201
3202                 gtk_container_child_get (GTK_CONTAINER (widget),
3203                                          child,
3204                                          "x", &child_allocation.x,
3205                                          "y", &child_allocation.y,
3206                                          NULL);
3207                 if (child_allocation.x != view_area.x ||
3208                     child_allocation.y != view_area.y) {
3209                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
3210                 }
3211         }
3212         g_list_free (children);
3213
3214         if (view->window_children)
3215                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
3216                                        &root_x, &root_y);
3217
3218         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
3219                 EvViewWindowChild *child;
3220                 EvRectangle        doc_rect;
3221                 GdkRectangle       view_rect;
3222
3223                 child = (EvViewWindowChild *)l->data;
3224
3225                 ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window), &doc_rect);
3226                 if (child->moved) {
3227                         doc_rect.x1 = child->orig_x;
3228                         doc_rect.y1 = child->orig_y;
3229                 }
3230                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
3231                 view_rect.x -= view->scroll_x;
3232                 view_rect.y -= view->scroll_y;
3233
3234                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
3235                         child->parent_x = root_x;
3236                         child->parent_y = root_y;
3237                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
3238                 }
3239         }
3240 }
3241
3242 static void
3243 ev_view_realize (GtkWidget *widget)
3244 {
3245         EvView    *view = EV_VIEW (widget);
3246         GdkWindow *bin_window;
3247         GtkStyle  *style;
3248
3249         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
3250                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
3251
3252         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3253         gdk_window_set_events (bin_window,
3254                                (gdk_window_get_events (bin_window) |
3255                                 GDK_EXPOSURE_MASK |
3256                                 GDK_BUTTON_PRESS_MASK |
3257                                 GDK_BUTTON_RELEASE_MASK |
3258                                 GDK_SCROLL_MASK |
3259                                 GDK_KEY_PRESS_MASK |
3260                                 GDK_POINTER_MOTION_MASK |
3261                                 GDK_POINTER_MOTION_HINT_MASK |
3262                                 GDK_ENTER_NOTIFY_MASK |
3263                                 GDK_LEAVE_NOTIFY_MASK));
3264
3265         style = gtk_widget_get_style (widget);
3266         gdk_window_set_background (bin_window, &style->mid[GTK_STATE_NORMAL]);
3267
3268         on_adjustment_value_changed (NULL, view);
3269 }
3270
3271 static gboolean
3272 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
3273 {
3274         EvView *view = EV_VIEW (widget);
3275         guint state;
3276
3277         state = event->state & gtk_accelerator_get_default_mod_mask ();
3278
3279         if (state == GDK_CONTROL_MASK) {
3280                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
3281                 if (event->direction == GDK_SCROLL_UP ||
3282                     event->direction == GDK_SCROLL_LEFT) {
3283                         if (ev_view_can_zoom_in (view)) {
3284                                 ev_view_zoom_in (view);
3285                         }
3286                 } else {
3287                         if (ev_view_can_zoom_out (view)) {
3288                                 ev_view_zoom_out (view);
3289                         }
3290                 }
3291
3292                 return TRUE;
3293         }
3294
3295         view->jump_to_find_result = FALSE;
3296
3297         /* Shift+Wheel scrolls the in the perpendicular direction */
3298         if (state & GDK_SHIFT_MASK) {
3299                 if (event->direction == GDK_SCROLL_UP)
3300                         event->direction = GDK_SCROLL_LEFT;
3301                 else if (event->direction == GDK_SCROLL_LEFT)
3302                         event->direction = GDK_SCROLL_UP;
3303                 else if (event->direction == GDK_SCROLL_DOWN)
3304                         event->direction = GDK_SCROLL_RIGHT;
3305                 else if (event->direction == GDK_SCROLL_RIGHT)
3306                         event->direction = GDK_SCROLL_DOWN;
3307
3308                 event->state &= ~GDK_SHIFT_MASK;
3309                 state &= ~GDK_SHIFT_MASK;
3310         }
3311
3312         if (state == 0 && view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous) {
3313                 switch (event->direction) {
3314                         case GDK_SCROLL_DOWN:
3315                         case GDK_SCROLL_RIGHT:
3316                                 ev_view_next_page (view);
3317                                 break;
3318                         case GDK_SCROLL_UP:
3319                         case GDK_SCROLL_LEFT:
3320                                 ev_view_previous_page (view);
3321                                 break;
3322                 }
3323
3324                 return TRUE;
3325         }
3326
3327         return FALSE;
3328 }
3329
3330 static EvViewSelection *
3331 find_selection_for_page (EvView *view,
3332                          gint    page)
3333 {
3334         GList *list;
3335
3336         for (list = view->selection_info.selections; list != NULL; list = list->next) {
3337                 EvViewSelection *selection;
3338
3339                 selection = (EvViewSelection *) list->data;
3340
3341                 if (selection->page == page)
3342                         return selection;
3343         }
3344
3345         return NULL;
3346 }
3347
3348 static gboolean
3349 ev_view_draw (GtkWidget *widget,
3350               cairo_t   *cr)
3351 {
3352         EvView      *view = EV_VIEW (widget);
3353         gint         i;
3354         GdkRectangle clip_rect;
3355
3356         if (view->loading) {
3357                 show_loading_window (view);
3358         } else if (view->loading_window &&
3359                    gtk_widget_get_visible (view->loading_window)) {
3360                 ev_view_loading_window_move (view);
3361         }
3362
3363         if (view->document == NULL)
3364                 return FALSE;
3365
3366         if (!gdk_cairo_get_clip_rectangle (cr, &clip_rect))
3367                 return FALSE;
3368
3369         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3370                 GdkRectangle page_area;
3371                 GtkBorder border;
3372                 gboolean page_ready = TRUE;
3373
3374                 if (!ev_view_get_page_extents (view, i, &page_area, &border))
3375                         continue;
3376
3377                 page_area.x -= view->scroll_x;
3378                 page_area.y -= view->scroll_y;
3379
3380                 draw_one_page (view, i, cr, &page_area, &border, &clip_rect, &page_ready);
3381
3382                 if (page_ready && view->find_pages && view->highlight_find_results)
3383                         highlight_find_results (view, cr, i);
3384                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3385                         show_annotation_windows (view, i);
3386                 if (page_ready && view->focus_annotation)
3387                         focus_annotation (view, cr, i, &clip_rect);
3388                 if (page_ready && view->synctex_result)
3389                         highlight_forward_search_results (view, cr, i);
3390         }
3391
3392         if (GTK_WIDGET_CLASS (ev_view_parent_class)->draw)
3393                 GTK_WIDGET_CLASS (ev_view_parent_class)->draw (widget, cr);
3394
3395         return FALSE;
3396 }
3397
3398 static gboolean
3399 ev_view_do_popup_menu (EvView *view,
3400                        gdouble x,
3401                        gdouble y)
3402 {
3403         GList        *items = NULL;
3404         EvLink       *link;
3405         EvImage      *image;
3406         EvAnnotation *annot;
3407
3408         image = ev_view_get_image_at_location (view, x, y);
3409         if (image)
3410                 items = g_list_prepend (items, image);
3411
3412         link = ev_view_get_link_at_location (view, x, y);
3413         if (link)
3414                 items = g_list_prepend (items, link);
3415
3416         annot = ev_view_get_annotation_at_location (view, x, y);
3417         if (annot)
3418                 items = g_list_prepend (items, annot);
3419
3420         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, items);
3421
3422         g_list_free (items);
3423
3424         return TRUE;
3425 }
3426
3427 static gboolean
3428 ev_view_popup_menu (GtkWidget *widget)
3429 {
3430         gint x, y;
3431
3432         gtk_widget_get_pointer (widget, &x, &y);
3433         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3434 }
3435
3436 static void
3437 get_link_area (EvView       *view,
3438                gint          x,
3439                gint          y,
3440                EvLink       *link,
3441                GdkRectangle *area)
3442 {
3443         EvMappingList *link_mapping;
3444         gint           page;
3445         gint           x_offset = 0, y_offset = 0;
3446
3447         x += view->scroll_x;
3448         y += view->scroll_y;
3449
3450         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3451
3452         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
3453         ev_view_get_area_from_mapping (view, page,
3454                                        link_mapping,
3455                                        link, area);
3456 }
3457
3458 static void
3459 get_annot_area (EvView       *view,
3460                gint          x,
3461                gint          y,
3462                EvAnnotation *annot,
3463                GdkRectangle *area)
3464 {
3465         EvMappingList *annot_mapping;
3466         gint           page;
3467         gint           x_offset = 0, y_offset = 0;
3468
3469         x += view->scroll_x;
3470         y += view->scroll_y;
3471
3472         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3473
3474         annot_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
3475         ev_view_get_area_from_mapping (view, page,
3476                                        annot_mapping,
3477                                        annot, area);
3478 }
3479
3480 static gboolean
3481 ev_view_query_tooltip (GtkWidget  *widget,
3482                        gint        x,
3483                        gint        y,
3484                        gboolean    keyboard_tip,
3485                        GtkTooltip *tooltip)
3486 {
3487         EvView       *view = EV_VIEW (widget);
3488         EvLink       *link;
3489         EvAnnotation *annot;
3490         gchar        *text;
3491
3492         annot = ev_view_get_annotation_at_location (view, x, y);
3493         if (annot) {
3494                 const gchar *contents;
3495
3496                 if ((contents = ev_annotation_get_contents (annot))) {
3497                         GdkRectangle annot_area;
3498
3499                         get_annot_area (view, x, y, annot, &annot_area);
3500                         gtk_tooltip_set_text (tooltip, contents);
3501                         gtk_tooltip_set_tip_area (tooltip, &annot_area);
3502
3503                         return TRUE;
3504                 }
3505         }
3506
3507         link = ev_view_get_link_at_location (view, x, y);
3508         if (!link)
3509                 return FALSE;
3510
3511         text = tip_from_link (view, link);
3512         if (text && g_utf8_validate (text, -1, NULL)) {
3513                 GdkRectangle link_area;
3514
3515                 get_link_area (view, x, y, link, &link_area);
3516                 gtk_tooltip_set_text (tooltip, text);
3517                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3518                 g_free (text);
3519
3520                 return TRUE;
3521         }
3522         g_free (text);
3523
3524         return FALSE;
3525 }
3526
3527 static void
3528 start_selection_for_event (EvView         *view,
3529                            GdkEventButton *event)
3530 {
3531         clear_selection (view);
3532
3533         view->selection_info.start.x = event->x + view->scroll_x;
3534         view->selection_info.start.y = event->y + view->scroll_y;
3535
3536         switch (event->type) {
3537                 case GDK_2BUTTON_PRESS:
3538                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3539                         break;
3540                 case GDK_3BUTTON_PRESS:
3541                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3542                         break;
3543                 default:
3544                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3545                         return;
3546         }
3547
3548         /* In case of WORD or LINE, compute selections now */
3549         compute_selections (view,
3550                             view->selection_info.style,
3551                             &(view->selection_info.start),
3552                             &(view->selection_info.start));
3553 }
3554
3555 static gboolean
3556 ev_view_button_press_event (GtkWidget      *widget,
3557                             GdkEventButton *event)
3558 {
3559         EvView *view = EV_VIEW (widget);
3560
3561         if (!view->document)
3562                 return FALSE;
3563
3564         if (!gtk_widget_has_focus (widget)) {
3565                 gtk_widget_grab_focus (widget);
3566         }
3567
3568         if (view->window_child_focus) {
3569                 EvAnnotationWindow *window;
3570                 EvAnnotation       *annot;
3571
3572                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3573                 annot = ev_annotation_window_get_annotation (window);
3574                 ev_annotation_window_ungrab_focus (window);
3575                 view->window_child_focus = NULL;
3576         }
3577
3578         view->pressed_button = event->button;
3579         view->selection_info.in_drag = FALSE;
3580
3581         if (view->adding_annot)
3582                 return FALSE;
3583
3584         if (view->scroll_info.autoscrolling)
3585                 return TRUE;
3586
3587         switch (event->button) {
3588                 case 1: {
3589                         EvImage *image;
3590                         EvAnnotation *annot;
3591                         EvFormField *field;
3592
3593                         if (event->state & GDK_CONTROL_MASK)
3594                                 return ev_view_synctex_backward_search (view, event->x , event->y);
3595
3596                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3597                                 if (event->type == GDK_3BUTTON_PRESS) {
3598                                         start_selection_for_event (view, event);
3599                                 } else if (location_in_selected_text (view,
3600                                                                event->x + view->scroll_x,
3601                                                                event->y + view->scroll_y)) {
3602                                         view->selection_info.in_drag = TRUE;
3603                                 } else {
3604                                         start_selection_for_event (view, event);
3605                                 }
3606
3607                                 gtk_widget_queue_draw (widget);
3608                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3609                                 ev_view_handle_annotation (view, annot, event->x, event->y, event->time);
3610                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3611                                 ev_view_remove_all (view);
3612                                 ev_view_handle_form_field (view, field, event->x, event->y);
3613                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3614                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3615                                 if (view->image_dnd_info.image)
3616                                         g_object_unref (view->image_dnd_info.image);
3617                                 view->image_dnd_info.image = g_object_ref (image);
3618                                 view->image_dnd_info.in_drag = TRUE;
3619
3620                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3621                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3622                         } else {
3623                                 ev_view_remove_all (view);
3624
3625                                 if (view->synctex_result) {
3626                                         g_free (view->synctex_result);
3627                                         view->synctex_result = NULL;
3628                                         gtk_widget_queue_draw (widget);
3629                                 }
3630
3631                                 if (view->focus_annotation)
3632                                         view->focus_annotation = NULL;
3633
3634                                 if (EV_IS_SELECTION (view->document))
3635                                         start_selection_for_event (view, event);
3636                         }
3637                 }
3638                         return TRUE;
3639                 case 2:
3640                         /* use root coordinates as reference point because
3641                          * scrolling changes window relative coordinates */
3642                         view->drag_info.start.x = event->x_root;
3643                         view->drag_info.start.y = event->y_root;
3644                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3645                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3646
3647                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3648
3649                         return TRUE;
3650                 case 3:
3651                         view->scroll_info.start_y = event->y;
3652                         return ev_view_do_popup_menu (view, event->x, event->y);
3653         }
3654
3655         return FALSE;
3656 }
3657
3658 static void
3659 ev_view_remove_all (EvView *view)
3660 {
3661         GList *children, *child;
3662
3663         children = gtk_container_get_children (GTK_CONTAINER (view));
3664         for (child = children; child && child->data; child = g_list_next (child)) {
3665                 gtk_container_remove (GTK_CONTAINER (view),
3666                                       GTK_WIDGET (child->data));
3667         }
3668         g_list_free (children);
3669 }
3670
3671 /*** Drag and Drop ***/
3672 static void
3673 ev_view_drag_data_get (GtkWidget        *widget,
3674                        GdkDragContext   *context,
3675                        GtkSelectionData *selection_data,
3676                        guint             info,
3677                        guint             time)
3678 {
3679         EvView *view = EV_VIEW (widget);
3680
3681         switch (info) {
3682                 case TARGET_DND_TEXT:
3683                         if (EV_IS_SELECTION (view->document) &&
3684                             view->selection_info.selections) {
3685                                 gchar *text;
3686
3687                                 text = get_selected_text (view);
3688                                 gtk_selection_data_set_text (selection_data,
3689                                                              text,
3690                                                              strlen (text));
3691                                 g_free (text);
3692                         }
3693                         break;
3694                 case TARGET_DND_IMAGE:
3695                         if (view->image_dnd_info.image) {
3696                                 GdkPixbuf *pixbuf;
3697
3698                                 ev_document_doc_mutex_lock ();
3699                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3700                                                                        view->image_dnd_info.image);
3701                                 ev_document_doc_mutex_unlock ();
3702
3703                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3704                                 g_object_unref (pixbuf);
3705                         }
3706                         break;
3707                 case TARGET_DND_URI:
3708                         if (view->image_dnd_info.image) {
3709                                 GdkPixbuf   *pixbuf;
3710                                 const gchar *tmp_uri;
3711                                 gchar       *uris[2];
3712
3713                                 ev_document_doc_mutex_lock ();
3714                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3715                                                                        view->image_dnd_info.image);
3716                                 ev_document_doc_mutex_unlock ();
3717
3718                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3719                                 g_object_unref (pixbuf);
3720
3721                                 uris[0] = (gchar *)tmp_uri;
3722                                 uris[1] = NULL;
3723                                 gtk_selection_data_set_uris (selection_data, uris);
3724                         }
3725         }
3726 }
3727
3728 static gboolean
3729 ev_view_drag_motion (GtkWidget      *widget,
3730                      GdkDragContext *context,
3731                      gint            x,
3732                      gint            y,
3733                      guint           time)
3734 {
3735         if (gtk_drag_get_source_widget (context) == widget)
3736                 gdk_drag_status (context, 0, time);
3737         else
3738                 gdk_drag_status (context, gdk_drag_context_get_suggested_action (context), time);
3739
3740         return TRUE;
3741 }
3742
3743 static gboolean
3744 selection_update_idle_cb (EvView *view)
3745 {
3746         compute_selections (view,
3747                             view->selection_info.style,
3748                             &view->selection_info.start,
3749                             &view->motion);
3750         view->selection_update_id = 0;
3751         return FALSE;
3752 }
3753
3754 static gboolean
3755 selection_scroll_timeout_cb (EvView *view)
3756 {
3757         gint x, y, shift = 0;
3758         GtkWidget *widget = GTK_WIDGET (view);
3759         GtkAllocation allocation;
3760
3761         gtk_widget_get_allocation (widget, &allocation);
3762         gtk_widget_get_pointer (widget, &x, &y);
3763
3764         if (y > allocation.height) {
3765                 shift = (y - allocation.height) / 2;
3766         } else if (y < 0) {
3767                 shift = y / 2;
3768         }
3769
3770         if (shift)
3771                 gtk_adjustment_set_value (view->vadjustment,
3772                                           CLAMP (gtk_adjustment_get_value (view->vadjustment) + shift,
3773                                                  gtk_adjustment_get_lower (view->vadjustment),
3774                                                  gtk_adjustment_get_upper (view->vadjustment) -
3775                                                  gtk_adjustment_get_page_size (view->vadjustment)));
3776
3777         if (x > allocation.width) {
3778                 shift = (x - allocation.width) / 2;
3779         } else if (x < 0) {
3780                 shift = x / 2;
3781         }
3782
3783         if (shift)
3784                 gtk_adjustment_set_value (view->hadjustment,
3785                                           CLAMP (gtk_adjustment_get_value (view->hadjustment) + shift,
3786                                                  gtk_adjustment_get_lower (view->hadjustment),
3787                                                  gtk_adjustment_get_upper (view->hadjustment) -
3788                                                  gtk_adjustment_get_page_size (view->hadjustment)));
3789
3790         return TRUE;
3791 }
3792
3793 static gboolean
3794 ev_view_drag_update_momentum (EvView *view)
3795 {
3796         int i;
3797         if (!view->drag_info.in_drag)
3798                 return FALSE;
3799
3800         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3801                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3802                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3803         }
3804
3805         /* Momentum is a moving average of 10ms granularity over
3806          * the last 100ms with each 10ms stored in buffer.
3807          */
3808
3809         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3810         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3811
3812         return TRUE;
3813 }
3814
3815 static gboolean
3816 ev_view_scroll_drag_release (EvView *view)
3817 {
3818         gdouble dhadj_value, dvadj_value;
3819         gdouble oldhadjustment, oldvadjustment;
3820         gdouble h_page_size, v_page_size;
3821         gdouble h_upper, v_upper;
3822         GtkAllocation allocation;
3823
3824         view->drag_info.momentum.x /= 1.2;
3825         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3826
3827         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
3828
3829         h_page_size = gtk_adjustment_get_page_size (view->hadjustment);
3830         v_page_size = gtk_adjustment_get_page_size (view->vadjustment);
3831
3832         dhadj_value = h_page_size *
3833                       (gdouble)view->drag_info.momentum.x / allocation.width;
3834         dvadj_value = v_page_size *
3835                       (gdouble)view->drag_info.momentum.y / allocation.height;
3836
3837         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3838         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3839
3840         h_upper = gtk_adjustment_get_upper (view->hadjustment);
3841         v_upper = gtk_adjustment_get_upper (view->vadjustment);
3842
3843         /* When we reach the edges, we need either to absorb some momentum and bounce by
3844          * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3845         if (((oldhadjustment + dhadj_value) > (h_upper - h_page_size)) ||
3846             ((oldhadjustment + dhadj_value) < 0))
3847                 view->drag_info.momentum.x = 0;
3848         if (((oldvadjustment + dvadj_value) > (v_upper - v_page_size)) ||
3849             ((oldvadjustment + dvadj_value) < 0))
3850                 view->drag_info.momentum.y = 0;
3851
3852         gtk_adjustment_set_value (view->hadjustment,
3853                                   MIN (oldhadjustment + dhadj_value,
3854                                        h_upper - h_page_size));
3855         gtk_adjustment_set_value (view->vadjustment,
3856                                   MIN (oldvadjustment + dvadj_value,
3857                                        v_upper - v_page_size));
3858
3859         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3860             ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3861                 return FALSE;
3862         else
3863                 return TRUE;
3864 }
3865
3866 static gboolean
3867 ev_view_motion_notify_event (GtkWidget      *widget,
3868                              GdkEventMotion *event)
3869 {
3870         EvView    *view = EV_VIEW (widget);
3871         GdkWindow *bin_window;
3872         gint       x, y;
3873
3874         if (!view->document)
3875                 return FALSE;
3876
3877         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
3878
3879         if (event->is_hint || event->window != bin_window) {
3880             gtk_widget_get_pointer (widget, &x, &y);
3881         } else {
3882             x = event->x;
3883             y = event->y;
3884         }
3885
3886         if (view->scroll_info.autoscrolling) {
3887                 view->scroll_info.last_y = y;
3888                 return TRUE;
3889         }
3890
3891         if (view->selection_info.in_drag) {
3892                 if (gtk_drag_check_threshold (widget,
3893                                               view->selection_info.start.x,
3894                                               view->selection_info.start.y,
3895                                               x, y)) {
3896                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3897
3898                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3899
3900                         gtk_drag_begin (widget, target_list,
3901                                         GDK_ACTION_COPY,
3902                                         1, (GdkEvent *)event);
3903
3904                         view->selection_info.in_drag = FALSE;
3905
3906                         gtk_target_list_unref (target_list);
3907
3908                         return TRUE;
3909                 }
3910         } else if (view->image_dnd_info.in_drag) {
3911                 if (gtk_drag_check_threshold (widget,
3912                                               view->selection_info.start.x,
3913                                               view->selection_info.start.y,
3914                                               x, y)) {
3915                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3916
3917                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3918                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3919
3920                         gtk_drag_begin (widget, target_list,
3921                                         GDK_ACTION_COPY,
3922                                         1, (GdkEvent *)event);
3923
3924                         view->image_dnd_info.in_drag = FALSE;
3925
3926                         gtk_target_list_unref (target_list);
3927
3928                         return TRUE;
3929                 }
3930         }
3931
3932         switch (view->pressed_button) {
3933         case 1:
3934                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3935                  * documents only.
3936                  */
3937                 if (view->rotation != 0)
3938                         return FALSE;
3939
3940                 /* Schedule timeout to scroll during selection and additionally
3941                  * scroll once to allow arbitrary speed. */
3942                 if (!view->selection_scroll_id)
3943                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3944                                                                (GSourceFunc)selection_scroll_timeout_cb,
3945                                                                view);
3946                 else
3947                     selection_scroll_timeout_cb (view);
3948
3949                 view->selection_info.in_selection = TRUE;
3950                 view->motion.x = x + view->scroll_x;
3951                 view->motion.y = y + view->scroll_y;
3952
3953                 /* Queue an idle to handle the motion.  We do this because
3954                  * handling any selection events in the motion could be slower
3955                  * than new motion events reach us.  We always put it in the
3956                  * idle to make sure we catch up and don't visibly lag the
3957                  * mouse. */
3958                 if (!view->selection_update_id)
3959                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3960
3961                 return TRUE;
3962         case 2:
3963                 if (!view->drag_info.in_drag) {
3964                         gboolean start;
3965                         int i;
3966
3967                         start = gtk_drag_check_threshold (widget,
3968                                                           view->drag_info.start.x,
3969                                                           view->drag_info.start.y,
3970                                                           event->x_root,
3971                                                           event->y_root);
3972                         view->drag_info.in_drag = start;
3973                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3974                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3975                         /* Set 100 to choose how long it takes to build up momentum */
3976                         /* Clear out previous momentum info: */
3977                         for (i = 0; i < DRAG_HISTORY; i++) {
3978                                 view->drag_info.buffer[i].x = event->x;
3979                                 view->drag_info.buffer[i].y = event->y;
3980                         }
3981                         view->drag_info.momentum.x = 0;
3982                         view->drag_info.momentum.y = 0;
3983                 }
3984
3985                 if (view->drag_info.in_drag) {
3986                         int dx, dy;
3987                         gdouble dhadj_value, dvadj_value;
3988                         GtkAllocation allocation;
3989
3990                         view->drag_info.buffer[0].x = event->x;
3991                         view->drag_info.buffer[0].y = event->y;
3992
3993                         dx = event->x_root - view->drag_info.start.x;
3994                         dy = event->y_root - view->drag_info.start.y;
3995
3996                         gtk_widget_get_allocation (widget, &allocation);
3997
3998                         dhadj_value = gtk_adjustment_get_page_size (view->hadjustment) *
3999                                       (gdouble)dx / allocation.width;
4000                         dvadj_value = gtk_adjustment_get_page_size (view->vadjustment) *
4001                                       (gdouble)dy / allocation.height;
4002
4003                         /* clamp scrolling to visible area */
4004                         gtk_adjustment_set_value (view->hadjustment,
4005                                                   MIN (view->drag_info.hadj - dhadj_value,
4006                                                        gtk_adjustment_get_upper (view->hadjustment) -
4007                                                        gtk_adjustment_get_page_size (view->hadjustment)));
4008                         gtk_adjustment_set_value (view->vadjustment,
4009                                                   MIN (view->drag_info.vadj - dvadj_value,
4010                                                        gtk_adjustment_get_upper (view->vadjustment) -
4011                                                        gtk_adjustment_get_page_size (view->vadjustment)));
4012
4013                         return TRUE;
4014                 }
4015
4016                 break;
4017         default:
4018                 ev_view_handle_cursor_over_xy (view, x, y);
4019         }
4020
4021         return FALSE;
4022 }
4023
4024 static gboolean
4025 ev_view_button_release_event (GtkWidget      *widget,
4026                               GdkEventButton *event)
4027 {
4028         EvView *view = EV_VIEW (widget);
4029         EvLink *link = NULL;
4030
4031         view->image_dnd_info.in_drag = FALSE;
4032
4033         if (view->scroll_info.autoscrolling) {
4034                 ev_view_autoscroll_stop (view);
4035                 view->pressed_button = -1;
4036
4037                 return TRUE;
4038         }
4039
4040         if (view->pressed_button == 1 && event->state & GDK_CONTROL_MASK) {
4041                 view->pressed_button = -1;
4042                 return TRUE;
4043         }
4044
4045         if (view->drag_info.in_drag) {
4046                 view->drag_info.release_timeout_id =
4047                         g_timeout_add (20,
4048                                        (GSourceFunc)ev_view_scroll_drag_release, view);
4049         }
4050
4051         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
4052                 link = ev_view_get_link_at_location (view, event->x, event->y);
4053         }
4054
4055         view->drag_info.in_drag = FALSE;
4056
4057         if (view->adding_annot && view->pressed_button == 1) {
4058                 view->adding_annot = FALSE;
4059                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
4060                 view->pressed_button = -1;
4061
4062                 ev_view_create_annotation (view,
4063                                            view->adding_annot_type,
4064                                            event->x + view->scroll_x,
4065                                            event->y + view->scroll_y);
4066
4067                 return FALSE;
4068         }
4069
4070         if (view->pressed_button == 2) {
4071                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
4072         }
4073
4074         view->pressed_button = -1;
4075
4076         if (view->selection_scroll_id) {
4077             g_source_remove (view->selection_scroll_id);
4078             view->selection_scroll_id = 0;
4079         }
4080         if (view->selection_update_id) {
4081             g_source_remove (view->selection_update_id);
4082             view->selection_update_id = 0;
4083         }
4084
4085         if (view->selection_info.selections) {
4086                 clear_link_selected (view);
4087                 ev_view_update_primary_selection (view);
4088
4089                 if (view->selection_info.in_drag) {
4090                         clear_selection (view);
4091                         gtk_widget_queue_draw (widget);
4092                 }
4093
4094                 view->selection_info.in_drag = FALSE;
4095         } else if (link) {
4096                 if (event->button == 2) {
4097                         EvLinkAction    *action;
4098                         EvLinkActionType type;
4099
4100                         action = ev_link_get_action (link);
4101                         if (!action)
4102                                 return FALSE;
4103
4104                         type = ev_link_action_get_action_type (action);
4105                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
4106                                 g_signal_emit (view,
4107                                                signals[SIGNAL_EXTERNAL_LINK],
4108                                                0, action);
4109                         }
4110                 } else {
4111                         ev_view_handle_link (view, link);
4112                 }
4113         }
4114
4115         return FALSE;
4116 }
4117
4118 static gboolean
4119 ev_view_key_press_event (GtkWidget   *widget,
4120                          GdkEventKey *event)
4121 {
4122         EvView *view = EV_VIEW (widget);
4123
4124         if (!view->document)
4125                 return FALSE;
4126
4127         if (!gtk_widget_has_focus (widget)) {
4128                 /* Forward key events to current focused window child */
4129                 if (view->window_child_focus) {
4130                         GdkEventKey *new_event;
4131                         gboolean     handled;
4132
4133                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
4134                         g_object_unref (new_event->window);
4135                         new_event->window = gtk_widget_get_window (view->window_child_focus->window);
4136                         if (new_event->window)
4137                                 g_object_ref (new_event->window);
4138                         gtk_widget_realize (view->window_child_focus->window);
4139                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
4140                         gdk_event_free ((GdkEvent *)new_event);
4141
4142                         return handled;
4143                 }
4144
4145                 return FALSE;
4146         }
4147
4148         return gtk_bindings_activate_event (G_OBJECT (widget), event);
4149 }
4150
4151 static gint
4152 ev_view_focus_in (GtkWidget     *widget,
4153                   GdkEventFocus *event)
4154 {
4155         if (EV_VIEW (widget)->pixbuf_cache)
4156                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4157         gtk_widget_queue_draw (widget);
4158
4159         return FALSE;
4160 }
4161
4162 static gint
4163 ev_view_focus_out (GtkWidget     *widget,
4164                    GdkEventFocus *event)
4165 {
4166         if (EV_VIEW (widget)->pixbuf_cache)
4167                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4168         gtk_widget_queue_draw (widget);
4169
4170         return FALSE;
4171 }
4172
4173 static gboolean
4174 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4175 {
4176         EvView *view = EV_VIEW (widget);
4177
4178         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4179                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4180
4181         return FALSE;
4182 }
4183
4184 static gboolean
4185 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4186 {
4187         EvView *view = EV_VIEW (widget);
4188
4189         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4190
4191         return FALSE;
4192 }
4193
4194 static void
4195 ev_view_style_set (GtkWidget *widget,
4196                    GtkStyle  *old_style)
4197 {
4198         if (EV_VIEW (widget)->pixbuf_cache)
4199                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4200
4201         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
4202 }
4203
4204 /*** Drawing ***/
4205
4206 static void
4207 draw_rubberband (EvView             *view,
4208                  cairo_t            *cr,
4209                  const GdkRectangle *rect,
4210                  gdouble             alpha)
4211 {
4212         GtkStyle *style;
4213         const GdkColor *fill_color_gdk;
4214         gdouble   r, g, b;
4215
4216         style = gtk_widget_get_style (GTK_WIDGET (view));
4217         fill_color_gdk = &style->base[GTK_STATE_SELECTED];
4218         r = fill_color_gdk->red / 65535.;
4219         g = fill_color_gdk->green / 65535.;
4220         b = fill_color_gdk->blue / 65535.;
4221
4222         cairo_save (cr);
4223
4224         cairo_set_source_rgba (cr, r, g, b, alpha);
4225         cairo_rectangle (cr,
4226                          rect->x - view->scroll_x,
4227                          rect->y - view->scroll_y,
4228                          rect->width, rect->height);
4229         cairo_fill_preserve (cr);
4230
4231         cairo_set_line_width (cr, 0.5);
4232         cairo_set_source_rgb (cr, r, g, b);
4233         cairo_stroke (cr);
4234
4235         cairo_restore (cr);
4236 }
4237
4238
4239 static void
4240 highlight_find_results (EvView *view,
4241                         cairo_t *cr,
4242                         int page)
4243 {
4244         gint       i, n_results = 0;
4245         n_results = ev_view_find_get_n_results (view, page);
4246
4247         for (i = 0; i < n_results; i++) {
4248                 EvRectangle *rectangle;
4249                 GdkRectangle view_rectangle;
4250                 gdouble      alpha;
4251
4252                 if (i == view->find_result && page == view->current_page) {
4253                         alpha = 0.6;
4254                 } else {
4255                         alpha = 0.3;
4256                 }
4257
4258                 rectangle = ev_view_find_get_result (view, page, i);
4259                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4260                 draw_rubberband (view, cr, &view_rectangle, alpha);
4261         }
4262 }
4263
4264 static void
4265 highlight_forward_search_results (EvView *view,
4266                                   cairo_t *cr,
4267                                   int page)
4268 {
4269         GdkRectangle rect;
4270         EvMapping   *mapping = view->synctex_result;
4271
4272         if (GPOINTER_TO_INT (mapping->data) != page)
4273                 return;
4274
4275         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4276
4277         cairo_save (cr);
4278         cairo_set_source_rgb (cr, 1., 0., 0.);
4279         cairo_rectangle (cr,
4280                          rect.x - view->scroll_x,
4281                          rect.y - view->scroll_y,
4282                          rect.width, rect.height);
4283         cairo_stroke (cr);
4284         cairo_restore (cr);
4285 }
4286
4287 static void
4288 focus_annotation (EvView       *view,
4289                   cairo_t      *cr,
4290                   gint          page,
4291                   GdkRectangle *clip)
4292 {
4293         GtkWidget    *widget = GTK_WIDGET (view);
4294         GdkRectangle  rect;
4295         EvMapping    *mapping = view->focus_annotation;
4296         EvAnnotation *annot = (EvAnnotation *)mapping->data;
4297
4298         if (ev_annotation_get_page_index (annot) != page)
4299                 return;
4300
4301         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4302
4303         gtk_paint_focus (gtk_widget_get_style (widget),
4304                          cr,
4305                          gtk_widget_get_state (widget),
4306                          widget, NULL,
4307                          rect.x - view->scroll_x,
4308                          rect.y - view->scroll_y,
4309                          rect.width + 1, rect.height + 1);
4310 }
4311
4312 static void
4313 ev_view_loading_window_move (EvView *view)
4314 {
4315         GtkWidget       *widget = GTK_WIDGET (view);
4316         EvLoadingWindow *window = EV_LOADING_WINDOW (view->loading_window);
4317         gint             root_x, root_y;
4318         gint             window_width;
4319         GtkAllocation    allocation;
4320
4321         gtk_widget_get_allocation (widget, &allocation);
4322         gdk_window_get_origin (gtk_widget_get_window (widget), &root_x, &root_y);
4323         ev_loading_window_get_size (window, &window_width, NULL);
4324
4325         root_x += allocation.width - window_width - 10;
4326         root_y += 10;
4327
4328         ev_loading_window_move (window, root_x, root_y);
4329 }
4330
4331 static gboolean
4332 show_loading_window_cb (EvView *view)
4333 {
4334         if (!view->loading_window) {
4335                 GtkWindow *parent;
4336                 GdkScreen *screen;
4337
4338                 parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
4339                 view->loading_window = ev_loading_window_new (parent);
4340
4341                 /* Show the window off screen to get a valid size asap */
4342                 screen = gtk_widget_get_screen (GTK_WIDGET (view));
4343                 gtk_window_move (GTK_WINDOW (view->loading_window),
4344                                  gdk_screen_get_width (screen) + 1,
4345                                  gdk_screen_get_height (screen) + 1);
4346                 gtk_widget_show (view->loading_window);
4347         }
4348
4349         ev_view_loading_window_move (view);
4350
4351         gtk_widget_show (view->loading_window);
4352
4353         view->loading_timeout = 0;
4354
4355         return FALSE;
4356 }
4357
4358 static void
4359 show_loading_window (EvView *view)
4360 {
4361         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4362                 ev_view_loading_window_move (view);
4363                 return;
4364         }
4365
4366         if (!view->loading_timeout) {
4367                 view->loading_timeout =
4368                         g_timeout_add_full (G_PRIORITY_LOW,
4369                                             0.5, (GSourceFunc)show_loading_window_cb,
4370                                             view, NULL);
4371         }
4372 }
4373
4374 static void
4375 hide_loading_window (EvView *view)
4376 {
4377         if (view->loading_timeout) {
4378                 g_source_remove (view->loading_timeout);
4379                 view->loading_timeout = 0;
4380         }
4381
4382         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4383                 gtk_widget_hide (view->loading_window);
4384         }
4385 }
4386
4387 static void
4388 draw_one_page (EvView       *view,
4389                gint          page,
4390                cairo_t      *cr,
4391                GdkRectangle *page_area,
4392                GtkBorder    *border,
4393                GdkRectangle *expose_area,
4394                gboolean     *page_ready)
4395 {
4396         GdkRectangle overlap;
4397         GdkRectangle real_page_area;
4398         gint         current_page;
4399         gboolean     inverted_colors;
4400
4401         g_assert (view->document);
4402
4403         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4404                 return;
4405
4406         /* Render the document itself */
4407         real_page_area = *page_area;
4408
4409         real_page_area.x += border->left;
4410         real_page_area.y += border->top;
4411         real_page_area.width -= (border->left + border->right);
4412         real_page_area.height -= (border->top + border->bottom);
4413         *page_ready = TRUE;
4414
4415         current_page = ev_document_model_get_page (view->model);
4416         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4417         ev_document_misc_paint_one_page (cr,
4418                                          GTK_WIDGET (view),
4419                                          page_area, border,
4420                                          page == current_page,
4421                                          inverted_colors);
4422
4423         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4424                 gint             width, height;
4425                 gint             page_width, page_height;
4426                 cairo_surface_t *page_surface = NULL;
4427                 gint             selection_width, selection_height;
4428                 cairo_surface_t *selection_surface = NULL;
4429
4430                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4431
4432                 if (!page_surface) {
4433                         if (page == current_page)
4434                                 show_loading_window (view);
4435
4436                         *page_ready = FALSE;
4437
4438                         return;
4439                 }
4440
4441                 if (page == current_page)
4442                         hide_loading_window (view);
4443
4444                 ev_view_get_page_size (view, page, &width, &height);
4445
4446                 page_width = cairo_image_surface_get_width (page_surface);
4447                 page_height = cairo_image_surface_get_height (page_surface);
4448
4449                 cairo_save (cr);
4450                 cairo_translate (cr, overlap.x, overlap.y);
4451
4452                 if (width != page_width || height != page_height) {
4453                         cairo_pattern_set_filter (cairo_get_source (cr),
4454                                                   CAIRO_FILTER_FAST);
4455                         cairo_scale (cr,
4456                                      (gdouble)width / page_width,
4457                                      (gdouble)height / page_height);
4458                 }
4459
4460                 cairo_surface_set_device_offset (page_surface,
4461                                                  overlap.x - real_page_area.x,
4462                                                  overlap.y - real_page_area.y);
4463                 cairo_set_source_surface (cr, page_surface, 0, 0);
4464                 cairo_paint (cr);
4465                 cairo_restore (cr);
4466
4467                 /* Get the selection pixbuf iff we have something to draw */
4468                 if (find_selection_for_page (view, page) &&
4469                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4470                         selection_surface =
4471                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4472                                                                        page,
4473                                                                        view->scale,
4474                                                                        NULL);
4475                 }
4476
4477                 if (!selection_surface) {
4478                         return;
4479                 }
4480
4481                 selection_width = cairo_image_surface_get_width (selection_surface);
4482                 selection_height = cairo_image_surface_get_height (selection_surface);
4483
4484                 cairo_save (cr);
4485                 cairo_translate (cr, overlap.x, overlap.y);
4486
4487                 if (width != selection_width || height != selection_height) {
4488                         cairo_pattern_set_filter (cairo_get_source (cr),
4489                                                   CAIRO_FILTER_FAST);
4490                         cairo_scale (cr,
4491                                      (gdouble)width / selection_width,
4492                                      (gdouble)height / selection_height);
4493                 }
4494
4495                 cairo_surface_set_device_offset (selection_surface,
4496                                                  overlap.x - real_page_area.x,
4497                                                  overlap.y - real_page_area.y);
4498
4499                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4500                 cairo_paint (cr);
4501                 cairo_restore (cr);
4502         }
4503 }
4504
4505 /*** GObject functions ***/
4506
4507 static void
4508 ev_view_finalize (GObject *object)
4509 {
4510         EvView *view = EV_VIEW (object);
4511
4512         clear_selection (view);
4513         clear_link_selected (view);
4514
4515         if (view->synctex_result) {
4516                 g_free (view->synctex_result);
4517                 view->synctex_result = NULL;
4518         }
4519
4520         if (view->image_dnd_info.image)
4521                 g_object_unref (view->image_dnd_info.image);
4522         view->image_dnd_info.image = NULL;
4523
4524         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4525 }
4526
4527 static void
4528 ev_view_dispose (GObject *object)
4529 {
4530         EvView *view = EV_VIEW (object);
4531
4532         if (view->model) {
4533                 g_object_unref (view->model);
4534                 view->model = NULL;
4535         }
4536
4537         if (view->pixbuf_cache) {
4538                 g_object_unref (view->pixbuf_cache);
4539                 view->pixbuf_cache = NULL;
4540         }
4541
4542         if (view->document) {
4543                 g_object_unref (view->document);
4544                 view->document = NULL;
4545         }
4546
4547         if (view->page_cache) {
4548                 g_object_unref (view->page_cache);
4549                 view->page_cache = NULL;
4550         }
4551
4552         ev_view_window_children_free (view);
4553
4554         if (view->selection_scroll_id) {
4555             g_source_remove (view->selection_scroll_id);
4556             view->selection_scroll_id = 0;
4557         }
4558
4559         if (view->selection_update_id) {
4560             g_source_remove (view->selection_update_id);
4561             view->selection_update_id = 0;
4562         }
4563
4564         if (view->scroll_info.timeout_id) {
4565             g_source_remove (view->scroll_info.timeout_id);
4566             view->scroll_info.timeout_id = 0;
4567         }
4568
4569         if (view->drag_info.drag_timeout_id) {
4570                 g_source_remove (view->drag_info.drag_timeout_id);
4571                 view->drag_info.drag_timeout_id = 0;
4572         }
4573
4574         if (view->drag_info.release_timeout_id) {
4575                 g_source_remove (view->drag_info.release_timeout_id);
4576                 view->drag_info.release_timeout_id = 0;
4577         }
4578
4579         if (view->loading_timeout) {
4580                 g_source_remove (view->loading_timeout);
4581                 view->loading_timeout = 0;
4582         }
4583
4584         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4585
4586         G_OBJECT_CLASS (ev_view_parent_class)->dispose (object);
4587 }
4588
4589 static AtkObject *
4590 ev_view_get_accessible (GtkWidget *widget)
4591 {
4592         static gboolean first_time = TRUE;
4593
4594         if (first_time) {
4595                 AtkObjectFactory *factory;
4596                 AtkRegistry *registry;
4597                 GType derived_type;
4598                 GType derived_atk_type;
4599
4600                 /*
4601                  * Figure out whether accessibility is enabled by looking at the
4602                  * type of the accessible object which would be created for
4603                  * the parent type of EvView.
4604                  */
4605                 derived_type = g_type_parent (EV_TYPE_VIEW);
4606
4607                 registry = atk_get_default_registry ();
4608                 factory = atk_registry_get_factory (registry,
4609                                                     derived_type);
4610                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4611                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE)) {
4612                         atk_registry_set_factory_type (registry,
4613                                                        EV_TYPE_VIEW,
4614                                                        ev_view_accessible_factory_get_type ());
4615                         EV_VIEW (widget)->a11y_enabled = TRUE;
4616                 }
4617                 first_time = FALSE;
4618         }
4619         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4620 }
4621
4622 static void
4623 ev_view_class_init (EvViewClass *class)
4624 {
4625         GObjectClass *object_class = G_OBJECT_CLASS (class);
4626         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4627         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4628         GtkBindingSet *binding_set;
4629
4630         object_class->dispose = ev_view_dispose;
4631         object_class->finalize = ev_view_finalize;
4632
4633         widget_class->draw = ev_view_draw;
4634         widget_class->button_press_event = ev_view_button_press_event;
4635         widget_class->motion_notify_event = ev_view_motion_notify_event;
4636         widget_class->button_release_event = ev_view_button_release_event;
4637         widget_class->key_press_event = ev_view_key_press_event;
4638         widget_class->focus_in_event = ev_view_focus_in;
4639         widget_class->focus_out_event = ev_view_focus_out;
4640         widget_class->get_accessible = ev_view_get_accessible;
4641         widget_class->size_request = ev_view_size_request;
4642         widget_class->size_allocate = ev_view_size_allocate;
4643         widget_class->realize = ev_view_realize;
4644         widget_class->scroll_event = ev_view_scroll_event;
4645         widget_class->enter_notify_event = ev_view_enter_notify_event;
4646         widget_class->leave_notify_event = ev_view_leave_notify_event;
4647         widget_class->style_set = ev_view_style_set;
4648         widget_class->drag_data_get = ev_view_drag_data_get;
4649         widget_class->drag_motion = ev_view_drag_motion;
4650         widget_class->popup_menu = ev_view_popup_menu;
4651         widget_class->query_tooltip = ev_view_query_tooltip;
4652
4653         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4654
4655         class->binding_activated = ev_view_scroll;
4656
4657         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4658                          G_TYPE_FROM_CLASS (object_class),
4659                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4660                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4661                          NULL, NULL,
4662                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4663                          G_TYPE_NONE, 2,
4664                          GTK_TYPE_SCROLL_TYPE,
4665                          G_TYPE_BOOLEAN);
4666         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4667                          G_TYPE_FROM_CLASS (object_class),
4668                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4669                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4670                          NULL, NULL,
4671                          g_cclosure_marshal_VOID__OBJECT,
4672                          G_TYPE_NONE, 1,
4673                          G_TYPE_OBJECT);
4674         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4675                          G_TYPE_FROM_CLASS (object_class),
4676                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4677                          G_STRUCT_OFFSET (EvViewClass, external_link),
4678                          NULL, NULL,
4679                          g_cclosure_marshal_VOID__OBJECT,
4680                          G_TYPE_NONE, 1,
4681                          G_TYPE_OBJECT);
4682         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4683                          G_TYPE_FROM_CLASS (object_class),
4684                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4685                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4686                          NULL, NULL,
4687                          g_cclosure_marshal_VOID__POINTER,
4688                          G_TYPE_NONE, 1,
4689                          G_TYPE_POINTER);
4690         signals[SIGNAL_SELECTION_CHANGED] = g_signal_new ("selection-changed",
4691                          G_TYPE_FROM_CLASS (object_class),
4692                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4693                          G_STRUCT_OFFSET (EvViewClass, selection_changed),
4694                          NULL, NULL,
4695                          g_cclosure_marshal_VOID__VOID,
4696                          G_TYPE_NONE, 0,
4697                          G_TYPE_NONE);
4698         signals[SIGNAL_SYNC_SOURCE] = g_signal_new ("sync-source",
4699                          G_TYPE_FROM_CLASS (object_class),
4700                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4701                          G_STRUCT_OFFSET (EvViewClass, sync_source),
4702                          NULL, NULL,
4703                          g_cclosure_marshal_VOID__POINTER,
4704                          G_TYPE_NONE, 1,
4705                          G_TYPE_POINTER);
4706         signals[SIGNAL_ANNOT_ADDED] = g_signal_new ("annot-added",
4707                          G_TYPE_FROM_CLASS (object_class),
4708                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4709                          G_STRUCT_OFFSET (EvViewClass, annot_added),
4710                          NULL, NULL,
4711                          g_cclosure_marshal_VOID__OBJECT,
4712                          G_TYPE_NONE, 1,
4713                          EV_TYPE_ANNOTATION);
4714         signals[SIGNAL_LAYERS_CHANGED] = g_signal_new ("layers-changed",
4715                          G_TYPE_FROM_CLASS (object_class),
4716                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4717                          G_STRUCT_OFFSET (EvViewClass, layers_changed),
4718                          NULL, NULL,
4719                          g_cclosure_marshal_VOID__VOID,
4720                          G_TYPE_NONE, 0,
4721                          G_TYPE_NONE);
4722
4723         binding_set = gtk_binding_set_by_class (class);
4724
4725         add_scroll_binding_keypad (binding_set, GDK_KEY_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4726         add_scroll_binding_keypad (binding_set, GDK_KEY_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4727         add_scroll_binding_keypad (binding_set, GDK_KEY_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4728         add_scroll_binding_keypad (binding_set, GDK_KEY_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4729         add_scroll_binding_keypad (binding_set, GDK_KEY_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4730         add_scroll_binding_keypad (binding_set, GDK_KEY_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4731         add_scroll_binding_keypad (binding_set, GDK_KEY_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4732         add_scroll_binding_keypad (binding_set, GDK_KEY_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4733         gtk_binding_entry_add_signal (binding_set, GDK_KEY_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4734                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4735         gtk_binding_entry_add_signal (binding_set, GDK_KEY_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4736                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4737         gtk_binding_entry_add_signal (binding_set, GDK_KEY_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4738                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4739         gtk_binding_entry_add_signal (binding_set, GDK_KEY_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4740                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4741
4742 }
4743
4744 static void
4745 ev_view_init (EvView *view)
4746 {
4747         gtk_widget_set_can_focus (GTK_WIDGET (view), TRUE);
4748
4749         view->start_page = -1;
4750         view->end_page = -1;
4751         view->spacing = 5;
4752         view->scale = 1.0;
4753         view->current_page = 0;
4754         view->pressed_button = -1;
4755         view->cursor = EV_VIEW_CURSOR_NORMAL;
4756         view->drag_info.in_drag = FALSE;
4757         view->scroll_info.autoscrolling = FALSE;
4758         view->selection_info.selections = NULL;
4759         view->selection_info.in_selection = FALSE;
4760         view->selection_info.in_drag = FALSE;
4761         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4762         view->continuous = TRUE;
4763         view->dual_page = FALSE;
4764         view->fullscreen = FALSE;
4765         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4766         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4767         view->jump_to_find_result = TRUE;
4768         view->highlight_find_results = FALSE;
4769
4770         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4771         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4772 }
4773
4774 /*** Callbacks ***/
4775
4776 static void
4777 ev_view_change_page (EvView *view,
4778                      gint    new_page)
4779 {
4780         gint x, y;
4781
4782         view->current_page = new_page;
4783         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4784
4785         hide_loading_window (view);
4786
4787         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4788         ev_view_handle_cursor_over_xy (view, x, y);
4789
4790         gtk_widget_queue_resize (GTK_WIDGET (view));
4791 }
4792
4793 static void
4794 job_finished_cb (EvPixbufCache  *pixbuf_cache,
4795                  cairo_region_t *region,
4796                  EvView         *view)
4797 {
4798         if (region) {
4799                 GdkWindow *bin_window;
4800
4801                 bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4802                 gdk_window_invalidate_region (bin_window, region, TRUE);
4803         } else {
4804                 gtk_widget_queue_draw (GTK_WIDGET (view));
4805         }
4806 }
4807
4808 static void
4809 ev_view_page_changed_cb (EvDocumentModel *model,
4810                          gint             old_page,
4811                          gint             new_page,
4812                          EvView          *view)
4813 {
4814         if (!view->document)
4815                 return;
4816
4817         if (view->current_page != new_page) {
4818                 ev_view_change_page (view, new_page);
4819         } else {
4820                 gtk_widget_queue_draw (GTK_WIDGET (view));
4821         }
4822
4823         view->find_result = 0;
4824 }
4825
4826 static void
4827 on_adjustment_value_changed (GtkAdjustment *adjustment,
4828                              EvView        *view)
4829 {
4830         int dx = 0, dy = 0;
4831         gint x, y;
4832         gint value;
4833         GList *children, *l;
4834
4835         if (!gtk_widget_get_realized (GTK_WIDGET (view)))
4836                 return;
4837
4838         if (view->hadjustment) {
4839                 value = (gint) gtk_adjustment_get_value (view->hadjustment);
4840                 dx = view->scroll_x - value;
4841                 view->scroll_x = value;
4842         } else {
4843                 view->scroll_x = 0;
4844         }
4845
4846         if (view->vadjustment) {
4847                 value = (gint) gtk_adjustment_get_value (view->vadjustment);
4848                 dy = view->scroll_y - value;
4849                 view->scroll_y = value;
4850         } else {
4851                 view->scroll_y = 0;
4852         }
4853
4854         children = gtk_container_get_children (GTK_CONTAINER (view));
4855         for (l = children; l && l->data; l = g_list_next (l)) {
4856                 gint       child_x, child_y;
4857                 GtkWidget *child = (GtkWidget *)l->data;
4858
4859                 gtk_container_child_get (GTK_CONTAINER (view),
4860                                          child,
4861                                          "x", &child_x,
4862                                          "y", &child_y,
4863                                          NULL);
4864                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4865         }
4866         g_list_free (children);
4867
4868         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4869                 EvViewWindowChild *child;
4870
4871                 child = (EvViewWindowChild *)l->data;
4872
4873                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4874         }
4875
4876         if (view->pending_resize) {
4877                 gtk_widget_queue_draw (GTK_WIDGET (view));
4878         } else {
4879                 GdkWindow *bin_window;
4880
4881                 bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
4882                 gdk_window_scroll (bin_window, dx, dy);
4883         }
4884
4885         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4886         ev_view_handle_cursor_over_xy (view, x, y);
4887
4888         if (view->document)
4889                 view_update_range_and_current_page (view);
4890 }
4891
4892 GtkWidget*
4893 ev_view_new (void)
4894 {
4895         GtkWidget *view;
4896
4897         view = g_object_new (EV_TYPE_VIEW, NULL);
4898
4899         return view;
4900 }
4901
4902 static void
4903 setup_caches (EvView *view)
4904 {
4905         gboolean inverted_colors;
4906
4907         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
4908         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->model, view->pixbuf_cache_size);
4909         view->page_cache = ev_page_cache_new (view->document);
4910         if (view->a11y_enabled) {
4911                 EvJobPageDataFlags flags = ev_page_cache_get_flags (view->page_cache);
4912
4913                 ev_page_cache_set_flags (view->page_cache,
4914                                          flags |
4915                                          EV_PAGE_DATA_INCLUDE_TEXT_LAYOUT |
4916                                          EV_PAGE_DATA_INCLUDE_TEXT);
4917         }
4918         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4919         ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
4920         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4921 }
4922
4923 static void
4924 clear_caches (EvView *view)
4925 {
4926         if (view->pixbuf_cache) {
4927                 g_object_unref (view->pixbuf_cache);
4928                 view->pixbuf_cache = NULL;
4929         }
4930
4931         if (view->page_cache) {
4932                 g_object_unref (view->page_cache);
4933                 view->page_cache = NULL;
4934         }
4935 }
4936
4937 /**
4938  * ev_view_set_page_cache_size:
4939  * @view:
4940  * @cache_size:
4941  *
4942  * Sets the maximum size in bytes that will be used to cache
4943  * rendered pages. Use 0 to disable caching rendered pages.
4944  *
4945  * Note that this limit doesn't affect the current visible page range,
4946  * which will always be rendered. In order to limit the total memory used
4947  * you have to use ev_document_model_set_max_scale() too.
4948  *
4949  */
4950 void
4951 ev_view_set_page_cache_size (EvView *view,
4952                              gsize   cache_size)
4953 {
4954         if (view->pixbuf_cache_size == cache_size)
4955                 return;
4956
4957         view->pixbuf_cache_size = cache_size;
4958         if (view->pixbuf_cache)
4959                 ev_pixbuf_cache_set_max_size (view->pixbuf_cache, cache_size);
4960 }
4961
4962 void
4963 ev_view_set_loading (EvView       *view,
4964                      gboolean      loading)
4965 {
4966         if (view->loading && !loading)
4967                 hide_loading_window (view);
4968         view->loading = loading;
4969         gtk_widget_queue_draw (GTK_WIDGET (view));
4970 }
4971
4972 static gboolean
4973 ev_view_autoscroll_cb (EvView *view)
4974 {
4975         gdouble speed, value;
4976
4977         /* If the user stops autoscrolling, autoscrolling will be
4978          * set to false but the timeout will continue; stop the timeout: */
4979         if (!view->scroll_info.autoscrolling) {
4980                 view->scroll_info.timeout_id = 0;
4981                 return FALSE;
4982         }
4983
4984         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4985                 (view->scroll_info.last_y < view->scroll_info.start_y))
4986                 return TRUE;
4987
4988         /* Replace 100 with your speed of choice: The lower the faster.
4989          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4990          *      based on the distance of the starting point from the mouse
4991          * (All also effected by the timeout interval of this callback) */
4992
4993         if (view->scroll_info.start_y > view->scroll_info.last_y)
4994                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
4995         else
4996                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
4997
4998         value = gtk_adjustment_get_value (view->vadjustment);
4999         value = CLAMP (value + speed, 0,
5000                        gtk_adjustment_get_upper (view->vadjustment) -
5001                        gtk_adjustment_get_page_size (view->vadjustment));
5002         gtk_adjustment_set_value (view->vadjustment, value);
5003
5004         return TRUE;
5005
5006 }
5007
5008 void
5009 ev_view_autoscroll_start (EvView *view)
5010 {
5011         gint x, y;
5012
5013         g_return_if_fail (EV_IS_VIEW (view));
5014
5015         if (view->scroll_info.autoscrolling)
5016                 return;
5017
5018         view->scroll_info.autoscrolling = TRUE;
5019         view->scroll_info.timeout_id =
5020                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5021                                view);
5022
5023         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5024         ev_view_handle_cursor_over_xy (view, x, y);
5025 }
5026
5027 void
5028 ev_view_autoscroll_stop (EvView *view)
5029 {
5030         gint x, y;
5031
5032         g_return_if_fail (EV_IS_VIEW (view));
5033
5034         if (!view->scroll_info.autoscrolling)
5035                 return;
5036
5037         view->scroll_info.autoscrolling = FALSE;
5038         if (view->scroll_info.timeout_id) {
5039                 g_source_remove (view->scroll_info.timeout_id);
5040                 view->scroll_info.timeout_id = 0;
5041         }
5042
5043         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5044         ev_view_handle_cursor_over_xy (view, x, y);
5045 }
5046
5047 static void
5048 ev_view_document_changed_cb (EvDocumentModel *model,
5049                              GParamSpec      *pspec,
5050                              EvView          *view)
5051 {
5052         EvDocument *document = ev_document_model_get_document (model);
5053
5054         if (document != view->document) {
5055                 gint current_page;
5056
5057                 clear_caches (view);
5058
5059                 if (view->document) {
5060                         g_object_unref (view->document);
5061                 }
5062
5063                 view->document = document;
5064                 view->find_result = 0;
5065
5066                 if (view->document) {
5067                         view->loading = FALSE;
5068                         g_object_ref (view->document);
5069                         setup_caches (view);
5070                 }
5071
5072                 current_page = ev_document_model_get_page (model);
5073                 if (view->current_page != current_page) {
5074                         ev_view_change_page (view, current_page);
5075                 } else {
5076                         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
5077                         gtk_widget_queue_resize (GTK_WIDGET (view));
5078                 }
5079         }
5080 }
5081
5082 static void
5083 ev_view_rotation_changed_cb (EvDocumentModel *model,
5084                              GParamSpec      *pspec,
5085                              EvView          *view)
5086 {
5087         gint rotation = ev_document_model_get_rotation (model);
5088
5089         view->rotation = rotation;
5090
5091         if (view->pixbuf_cache) {
5092                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5093                 if (!ev_document_is_page_size_uniform (view->document))
5094                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5095                 gtk_widget_queue_resize (GTK_WIDGET (view));
5096         }
5097
5098         ev_view_remove_all (view);
5099
5100         if (rotation != 0)
5101                 clear_selection (view);
5102 }
5103
5104 static void
5105 ev_view_inverted_colors_changed_cb (EvDocumentModel *model,
5106                                     GParamSpec      *pspec,
5107                                     EvView          *view)
5108 {
5109         if (view->pixbuf_cache) {
5110                 gboolean inverted_colors;
5111
5112                 inverted_colors = ev_document_model_get_inverted_colors (model);
5113                 ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
5114                 gtk_widget_queue_draw (GTK_WIDGET (view));
5115         }
5116 }
5117
5118 static void
5119 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
5120                                 GParamSpec      *pspec,
5121                                 EvView          *view)
5122 {
5123         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
5124
5125         view->sizing_mode = mode;
5126         if (mode != EV_SIZING_FREE)
5127                 gtk_widget_queue_resize (GTK_WIDGET (view));
5128 }
5129
5130 #define EPSILON 0.0000001
5131 static void
5132 ev_view_scale_changed_cb (EvDocumentModel *model,
5133                           GParamSpec      *pspec,
5134                           EvView          *view)
5135 {
5136         gdouble scale = ev_document_model_get_scale (model);
5137
5138         if (ABS (view->scale - scale) < EPSILON)
5139                 return;
5140
5141         view->scale = scale;
5142
5143         view->pending_resize = TRUE;
5144         if (view->sizing_mode == EV_SIZING_FREE)
5145                 gtk_widget_queue_resize (GTK_WIDGET (view));
5146 }
5147
5148 static void
5149 ev_view_continuous_changed_cb (EvDocumentModel *model,
5150                                GParamSpec      *pspec,
5151                                EvView          *view)
5152 {
5153         gboolean continuous = ev_document_model_get_continuous (model);
5154
5155         view->continuous = continuous;
5156         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5157         gtk_widget_queue_resize (GTK_WIDGET (view));
5158 }
5159
5160 static void
5161 ev_view_dual_page_changed_cb (EvDocumentModel *model,
5162                               GParamSpec      *pspec,
5163                               EvView          *view)
5164 {
5165         gboolean dual_page = ev_document_model_get_dual_page (model);
5166
5167         view->dual_page = dual_page;
5168         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5169         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5170          * preload_cache_size to be 2 if dual_page is set.
5171          */
5172         gtk_widget_queue_resize (GTK_WIDGET (view));
5173 }
5174
5175 static void
5176 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
5177                                GParamSpec      *pspec,
5178                                EvView          *view)
5179 {
5180         gboolean fullscreen = ev_document_model_get_fullscreen (model);
5181
5182         view->fullscreen = fullscreen;
5183         gtk_widget_queue_resize (GTK_WIDGET (view));
5184 }
5185
5186 void
5187 ev_view_set_model (EvView          *view,
5188                    EvDocumentModel *model)
5189 {
5190         g_return_if_fail (EV_IS_VIEW (view));
5191         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
5192
5193         if (model == view->model)
5194                 return;
5195
5196         if (view->model) {
5197                 g_signal_handlers_disconnect_by_func (view->model,
5198                                                       ev_view_document_changed_cb,
5199                                                       view);
5200                 g_signal_handlers_disconnect_by_func (view->model,
5201                                                       ev_view_page_changed_cb,
5202                                                       view);
5203                 g_object_unref (view->model);
5204         }
5205         view->model = g_object_ref (model);
5206
5207         /* Initialize view from model */
5208         view->rotation = ev_document_model_get_rotation (view->model);
5209         view->sizing_mode = ev_document_model_get_sizing_mode (view->model);
5210         view->scale = ev_document_model_get_scale (view->model);
5211         view->continuous = ev_document_model_get_continuous (view->model);
5212         view->dual_page = ev_document_model_get_dual_page (view->model);
5213         view->fullscreen = ev_document_model_get_fullscreen (view->model);
5214         ev_view_document_changed_cb (view->model, NULL, view);
5215
5216         g_signal_connect (view->model, "notify::document",
5217                           G_CALLBACK (ev_view_document_changed_cb),
5218                           view);
5219         g_signal_connect (view->model, "notify::rotation",
5220                           G_CALLBACK (ev_view_rotation_changed_cb),
5221                           view);
5222         g_signal_connect (view->model, "notify::inverted-colors",
5223                           G_CALLBACK (ev_view_inverted_colors_changed_cb),
5224                           view);
5225         g_signal_connect (view->model, "notify::sizing-mode",
5226                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
5227                           view);
5228         g_signal_connect (view->model, "notify::scale",
5229                           G_CALLBACK (ev_view_scale_changed_cb),
5230                           view);
5231         g_signal_connect (view->model, "notify::continuous",
5232                           G_CALLBACK (ev_view_continuous_changed_cb),
5233                           view);
5234         g_signal_connect (view->model, "notify::dual-page",
5235                           G_CALLBACK (ev_view_dual_page_changed_cb),
5236                           view);
5237         g_signal_connect (view->model, "notify::fullscreen",
5238                           G_CALLBACK (ev_view_fullscreen_changed_cb),
5239                           view);
5240         g_signal_connect (view->model, "page-changed",
5241                           G_CALLBACK (ev_view_page_changed_cb),
5242                           view);
5243 }
5244
5245 static void
5246 ev_view_reload_page (EvView         *view,
5247                      gint            page,
5248                      cairo_region_t *region)
5249 {
5250         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5251                                      region,
5252                                      page,
5253                                      view->rotation,
5254                                      view->scale);
5255 }
5256
5257 void
5258 ev_view_reload (EvView *view)
5259 {
5260         ev_pixbuf_cache_clear (view->pixbuf_cache);
5261         view_update_range_and_current_page (view);
5262 }
5263
5264 /*** Zoom and sizing mode ***/
5265
5266 gboolean
5267 ev_view_can_zoom_in (EvView *view)
5268 {
5269         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
5270 }
5271
5272 gboolean
5273 ev_view_can_zoom_out (EvView *view)
5274 {
5275         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
5276 }
5277
5278 void
5279 ev_view_zoom_in (EvView *view)
5280 {
5281         gdouble scale;
5282
5283         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5284
5285         view->pending_scroll = SCROLL_TO_CENTER;
5286         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
5287         ev_document_model_set_scale (view->model, scale);
5288 }
5289
5290 void
5291 ev_view_zoom_out (EvView *view)
5292 {
5293         gdouble scale;
5294
5295         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5296
5297         view->pending_scroll = SCROLL_TO_CENTER;
5298         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5299         ev_document_model_set_scale (view->model, scale);
5300 }
5301
5302 static double
5303 zoom_for_size_fit_width (gdouble doc_width,
5304                          gdouble doc_height,
5305                          int     target_width,
5306                          int     target_height)
5307 {
5308         return (double)target_width / doc_width;
5309 }
5310
5311 static double
5312 zoom_for_size_fit_height (gdouble doc_width,
5313                           gdouble doc_height,
5314                           int     target_width,
5315                           int     target_height)
5316 {
5317         return (double)target_height / doc_height;
5318 }
5319
5320 static double
5321 zoom_for_size_best_fit (gdouble doc_width,
5322                         gdouble doc_height,
5323                         int     target_width,
5324                         int     target_height)
5325 {
5326         double w_scale;
5327         double h_scale;
5328
5329         w_scale = (double)target_width / doc_width;
5330         h_scale = (double)target_height / doc_height;
5331
5332         return MIN (w_scale, h_scale);
5333 }
5334
5335 static void
5336 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5337                                                 int     width,
5338                                                 int     height)
5339 {
5340         gdouble doc_width, doc_height;
5341         GtkBorder border;
5342         gdouble scale;
5343         gint sb_size;
5344
5345         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5346         if (view->rotation == 90 || view->rotation == 270) {
5347                 gdouble tmp;
5348
5349                 tmp = doc_width;
5350                 doc_width = doc_height;
5351                 doc_height = tmp;
5352         }
5353
5354         compute_border (view, doc_width, doc_height, &border);
5355
5356         doc_width *= 2;
5357         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5358         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5359
5360         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5361
5362         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5363                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5364         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5365                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5366         else
5367                 g_assert_not_reached ();
5368
5369         ev_document_model_set_scale (view->model, scale);
5370 }
5371
5372 static void
5373 ev_view_zoom_for_size_continuous (EvView *view,
5374                                   int     width,
5375                                   int     height)
5376 {
5377         gdouble doc_width, doc_height;
5378         GtkBorder border;
5379         gdouble scale;
5380         gint sb_size;
5381
5382         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5383         if (view->rotation == 90 || view->rotation == 270) {
5384                 gdouble tmp;
5385
5386                 tmp = doc_width;
5387                 doc_width = doc_height;
5388                 doc_height = tmp;
5389         }
5390
5391         compute_border (view, doc_width, doc_height, &border);
5392
5393         width -= (border.left + border.right + 2 * view->spacing);
5394         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5395
5396         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5397
5398         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5399                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5400         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5401                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5402         else
5403                 g_assert_not_reached ();
5404
5405         ev_document_model_set_scale (view->model, scale);
5406 }
5407
5408 static void
5409 ev_view_zoom_for_size_dual_page (EvView *view,
5410                                  int     width,
5411                                  int     height)
5412 {
5413         GtkBorder border;
5414         gdouble doc_width, doc_height;
5415         gdouble scale;
5416         gint other_page;
5417
5418         other_page = view->current_page ^ 1;
5419
5420         /* Find the largest of the two. */
5421         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5422         if (other_page < ev_document_get_n_pages (view->document)) {
5423                 gdouble width_2, height_2;
5424
5425                 get_doc_page_size (view, other_page, &width_2, &height_2);
5426                 if (width_2 > doc_width)
5427                         doc_width = width_2;
5428                 if (height_2 > doc_height)
5429                         doc_height = height_2;
5430         }
5431         compute_border (view, width, height, &border);
5432
5433         doc_width = doc_width * 2;
5434         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5435         height -= (border.top + border.bottom + 2 * view->spacing);
5436
5437         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5438                 gint sb_size;
5439
5440                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5441                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5442         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5443                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5444         else
5445                 g_assert_not_reached ();
5446
5447         ev_document_model_set_scale (view->model, scale);
5448 }
5449
5450 static void
5451 ev_view_zoom_for_size_single_page (EvView *view,
5452                                    int     width,
5453                                    int     height)
5454 {
5455         gdouble doc_width, doc_height;
5456         GtkBorder border;
5457         gdouble scale;
5458
5459         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5460
5461         /* Get an approximate border */
5462         compute_border (view, width, height, &border);
5463
5464         width -= (border.left + border.right + 2 * view->spacing);
5465         height -= (border.top + border.bottom + 2 * view->spacing);
5466
5467         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5468                 gint sb_size;
5469
5470                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5471                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5472         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5473                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5474         else
5475                 g_assert_not_reached ();
5476
5477         ev_document_model_set_scale (view->model, scale);
5478 }
5479
5480 static void
5481 ev_view_zoom_for_size (EvView *view,
5482                        int     width,
5483                        int     height)
5484 {
5485         g_return_if_fail (EV_IS_VIEW (view));
5486         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5487                           view->sizing_mode == EV_SIZING_BEST_FIT);
5488         g_return_if_fail (width >= 0);
5489         g_return_if_fail (height >= 0);
5490
5491         if (view->document == NULL)
5492                 return;
5493
5494         if (view->continuous && view->dual_page)
5495                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5496         else if (view->continuous)
5497                 ev_view_zoom_for_size_continuous (view, width, height);
5498         else if (view->dual_page)
5499                 ev_view_zoom_for_size_dual_page (view, width, height);
5500         else
5501                 ev_view_zoom_for_size_single_page (view, width, height);
5502 }
5503
5504 /*** Find ***/
5505 static gint
5506 ev_view_find_get_n_results (EvView *view, gint page)
5507 {
5508         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5509 }
5510
5511 static EvRectangle *
5512 ev_view_find_get_result (EvView *view, gint page, gint result)
5513 {
5514         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5515 }
5516
5517 static void
5518 jump_to_find_result (EvView *view)
5519 {
5520         gint n_results;
5521         gint page = view->current_page;
5522
5523         n_results = ev_view_find_get_n_results (view, page);
5524
5525         if (n_results > 0 && view->find_result < n_results) {
5526                 EvRectangle *rect;
5527                 GdkRectangle view_rect;
5528
5529                 rect = ev_view_find_get_result (view, page, view->find_result);
5530                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5531                 ensure_rectangle_is_visible (view, &view_rect);
5532                 view->jump_to_find_result = FALSE;
5533         }
5534 }
5535
5536 /**
5537  * jump_to_find_page
5538  * @view: #EvView instance
5539  * @direction: Direction to look
5540  * @shift: Shift from current page
5541  *
5542  * Jumps to the first page that has occurences of searched word.
5543  * Uses a direction where to look and a shift from current page.
5544  *
5545  */
5546 static void
5547 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5548 {
5549         int n_pages, i;
5550
5551         n_pages = ev_document_get_n_pages (view->document);
5552
5553         for (i = 0; i < n_pages; i++) {
5554                 int page;
5555
5556                 if (direction == EV_VIEW_FIND_NEXT)
5557                         page = view->current_page + i;
5558                 else
5559                         page = view->current_page - i;
5560                 page += shift;
5561
5562                 if (page >= n_pages) {
5563                         page = page - n_pages;
5564                 } else if (page < 0)
5565                         page = page + n_pages;
5566
5567                 if (ev_view_find_get_n_results (view, page) > 0) {
5568                         ev_document_model_set_page (view->model, page);
5569                         break;
5570                 }
5571         }
5572 }
5573
5574 void
5575 ev_view_find_changed (EvView *view, GList **results, gint page)
5576 {
5577         view->find_pages = results;
5578
5579         if (view->jump_to_find_result == TRUE) {
5580                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5581                 jump_to_find_result (view);
5582         }
5583
5584         if (view->current_page == page)
5585                 gtk_widget_queue_draw (GTK_WIDGET (view));
5586 }
5587
5588 void
5589 ev_view_find_next (EvView *view)
5590 {
5591         gint n_results;
5592
5593         n_results = ev_view_find_get_n_results (view, view->current_page);
5594         view->find_result++;
5595
5596         if (view->find_result >= n_results) {
5597                 view->find_result = 0;
5598                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5599                 jump_to_find_result (view);
5600         } else {
5601                 jump_to_find_result (view);
5602                 gtk_widget_queue_draw (GTK_WIDGET (view));
5603         }
5604 }
5605
5606 void
5607 ev_view_find_previous (EvView *view)
5608 {
5609         view->find_result--;
5610
5611         if (view->find_result < 0) {
5612                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5613                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5614                 jump_to_find_result (view);
5615         } else {
5616                 jump_to_find_result (view);
5617                 gtk_widget_queue_draw (GTK_WIDGET (view));
5618         }
5619 }
5620
5621 void
5622 ev_view_find_search_changed (EvView *view)
5623 {
5624         /* search string has changed, focus on new search result */
5625         view->jump_to_find_result = TRUE;
5626         view->find_pages = NULL;
5627 }
5628
5629 void
5630 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5631 {
5632         view->highlight_find_results = value;
5633         gtk_widget_queue_draw (GTK_WIDGET (view));
5634 }
5635
5636 void
5637 ev_view_find_cancel (EvView *view)
5638 {
5639         view->find_pages = NULL;
5640 }
5641
5642 /*** Synctex ***/
5643 void
5644 ev_view_highlight_forward_search (EvView       *view,
5645                                   EvSourceLink *link)
5646 {
5647         EvMapping   *mapping;
5648         gint         page;
5649         GdkRectangle view_rect;
5650
5651         if (!ev_document_has_synctex (view->document))
5652                 return;
5653
5654         mapping = ev_document_synctex_forward_search (view->document, link);
5655         if (!mapping)
5656                 return;
5657
5658         if (view->synctex_result)
5659                 g_free (view->synctex_result);
5660         view->synctex_result = mapping;
5661
5662         page = GPOINTER_TO_INT (mapping->data);
5663         ev_document_model_set_page (view->model, page);
5664
5665         doc_rect_to_view_rect (view, page, &mapping->area, &view_rect);
5666         ensure_rectangle_is_visible (view, &view_rect);
5667         gtk_widget_queue_draw (GTK_WIDGET (view));
5668 }
5669
5670 /*** Selections ***/
5671
5672 /* compute_new_selection_rect/text calculates the area currently selected by
5673  * view_rect.  each handles a different mode;
5674  */
5675 static GList *
5676 compute_new_selection_rect (EvView       *view,
5677                             GdkPoint     *start,
5678                             GdkPoint     *stop)
5679 {
5680         GdkRectangle view_rect;
5681         int n_pages, i;
5682         GList *list = NULL;
5683
5684         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5685
5686         view_rect.x = MIN (start->x, stop->x);
5687         view_rect.y = MIN (start->y, stop->y);
5688         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5689         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5690
5691         n_pages = ev_document_get_n_pages (view->document);
5692
5693         for (i = 0; i < n_pages; i++) {
5694                 GdkRectangle page_area;
5695                 GtkBorder border;
5696
5697                 if (ev_view_get_page_extents (view, i, &page_area, &border)) {
5698                         GdkRectangle overlap;
5699
5700                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5701                                 EvViewSelection *selection;
5702
5703                                 selection = g_new0 (EvViewSelection, 1);
5704                                 selection->page = i;
5705                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5706                                                        &(selection->rect));
5707
5708                                 list = g_list_append (list, selection);
5709                         }
5710                 }
5711         }
5712
5713         return list;
5714 }
5715
5716 static gboolean
5717 gdk_rectangle_point_in (GdkRectangle *rectangle,
5718                         GdkPoint     *point)
5719 {
5720         return rectangle->x <= point->x &&
5721                 rectangle->y <= point->y &&
5722                 point->x < rectangle->x + rectangle->width &&
5723                 point->y < rectangle->y + rectangle->height;
5724 }
5725
5726 static GList *
5727 compute_new_selection_text (EvView          *view,
5728                             EvSelectionStyle style,
5729                             GdkPoint        *start,
5730                             GdkPoint        *stop)
5731 {
5732         int n_pages, i, first, last;
5733         GList *list = NULL;
5734         EvViewSelection *selection;
5735         gdouble width, height;
5736         int start_page, end_page;
5737
5738         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5739
5740         n_pages = ev_document_get_n_pages (view->document);
5741
5742         /* First figure out the range of pages the selection
5743          * affects. */
5744         first = n_pages;
5745         last = 0;
5746         if (view->continuous) {
5747                 start_page = 0;
5748                 end_page = n_pages;
5749         } else if (view->dual_page) {
5750                 start_page = view->start_page;
5751                 end_page = view->end_page + 1;
5752         } else {
5753                 start_page = view->current_page;
5754                 end_page = view->current_page + 1;
5755         }
5756
5757         for (i = start_page; i < end_page; i++) {
5758                 GdkRectangle page_area;
5759                 GtkBorder border;
5760
5761                 ev_view_get_page_extents (view, i, &page_area, &border);
5762                 if (gdk_rectangle_point_in (&page_area, start) ||
5763                     gdk_rectangle_point_in (&page_area, stop)) {
5764                         if (first == n_pages)
5765                                 first = i;
5766                         last = i;
5767                 }
5768
5769         }
5770
5771         /* Now create a list of EvViewSelection's for the affected
5772          * pages.  This could be an empty list, a list of just one
5773          * page or a number of pages.*/
5774         for (i = first; i < last + 1; i++) {
5775                 GdkRectangle page_area;
5776                 GtkBorder border;
5777                 GdkPoint *point;
5778
5779                 get_doc_page_size (view, i, &width, &height);
5780
5781                 selection = g_new0 (EvViewSelection, 1);
5782                 selection->page = i;
5783                 selection->style = style;
5784                 selection->rect.x1 = selection->rect.y1 = 0;
5785                 selection->rect.x2 = width;
5786                 selection->rect.y2 = height;
5787
5788                 ev_view_get_page_extents (view, i, &page_area, &border);
5789
5790                 if (gdk_rectangle_point_in (&page_area, start))
5791                         point = start;
5792                 else
5793                         point = stop;
5794
5795                 if (i == first)
5796                         view_point_to_doc_point (view, point, &page_area,
5797                                                  &selection->rect.x1,
5798                                                  &selection->rect.y1);
5799
5800                 /* If the selection is contained within just one page,
5801                  * make sure we don't write 'start' into both points
5802                  * in selection->rect. */
5803                 if (first == last)
5804                         point = stop;
5805
5806                 if (i == last)
5807                         view_point_to_doc_point (view, point, &page_area,
5808                                                  &selection->rect.x2,
5809                                                  &selection->rect.y2);
5810
5811                 list = g_list_append (list, selection);
5812         }
5813
5814         return list;
5815 }
5816
5817 /* This function takes the newly calculated list, and figures out which regions
5818  * have changed.  It then queues a redraw approporiately.
5819  */
5820 static void
5821 merge_selection_region (EvView *view,
5822                         GList  *new_list)
5823 {
5824         GList *old_list;
5825         GList *new_list_ptr, *old_list_ptr;
5826
5827         /* Update the selection */
5828         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5829         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5830         g_list_free (view->selection_info.selections);
5831         view->selection_info.selections = new_list;
5832         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5833         g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
5834
5835         new_list_ptr = new_list;
5836         old_list_ptr = old_list;
5837
5838         while (new_list_ptr || old_list_ptr) {
5839                 EvViewSelection *old_sel, *new_sel;
5840                 int cur_page;
5841                 cairo_region_t *region = NULL;
5842
5843                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5844                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5845
5846                 /* Assume that the lists are in order, and we run through them
5847                  * comparing them, one page at a time.  We come out with the
5848                  * first page we see. */
5849                 if (new_sel && old_sel) {
5850                         if (new_sel->page < old_sel->page) {
5851                                 new_list_ptr = new_list_ptr->next;
5852                                 old_sel = NULL;
5853                         } else if (new_sel->page > old_sel->page) {
5854                                 old_list_ptr = old_list_ptr->next;
5855                                 new_sel = NULL;
5856                         } else {
5857                                 new_list_ptr = new_list_ptr->next;
5858                                 old_list_ptr = old_list_ptr->next;
5859                         }
5860                 } else if (new_sel) {
5861                         new_list_ptr = new_list_ptr->next;
5862                 } else if (old_sel) {
5863                         old_list_ptr = old_list_ptr->next;
5864                 }
5865
5866                 g_assert (new_sel || old_sel);
5867
5868                 /* is the page we're looking at on the screen?*/
5869                 cur_page = new_sel ? new_sel->page : old_sel->page;
5870                 if (cur_page < view->start_page || cur_page > view->end_page)
5871                         continue;
5872
5873                 /* seed the cache with a new page.  We are going to need the new
5874                  * region too. */
5875                 if (new_sel) {
5876                         cairo_region_t *tmp_region = NULL;
5877
5878                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5879                                                                cur_page,
5880                                                                view->scale,
5881                                                                &tmp_region);
5882
5883                         if (tmp_region && !cairo_region_is_empty (tmp_region)) {
5884                                 new_sel->covered_region = cairo_region_reference (tmp_region);
5885                         }
5886                 }
5887
5888                 /* Now we figure out what needs redrawing */
5889                 if (old_sel && new_sel) {
5890                         if (old_sel->covered_region && new_sel->covered_region) {
5891                                 /* We only want to redraw the areas that have
5892                                  * changed, so we xor the old and new regions
5893                                  * and redraw if it's different */
5894                                 region = cairo_region_copy (old_sel->covered_region);
5895 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 9, 12)
5896                                 cairo_region_xor (region, new_sel->covered_region);
5897 #else
5898                                 cairo_region_t *tbr;
5899                                 tbr = cairo_region_copy (new_sel->covered_region);
5900
5901                                 /* xor old_sel, new_sel*/
5902                                 cairo_region_subtract (tbr, region);
5903                                 cairo_region_subtract (region, new_sel->covered_region);
5904                                 cairo_region_union (region, tbr);
5905                                 cairo_region_destroy (tbr);
5906 #endif
5907
5908                                 if (cairo_region_is_empty (region)) {
5909                                         cairo_region_destroy (region);
5910                                         region = NULL;
5911                                 } else {
5912                                         gint num_rectangles = cairo_region_num_rectangles (region);
5913                                         GdkRectangle r;
5914
5915                                         /* We need to make the damage region a little bigger
5916                                          * because the edges of the old selection might change
5917                                          */
5918                                         cairo_region_get_rectangle (region, 0, &r);
5919                                         r.x -= 5;
5920                                         r.width = 5;
5921                                         cairo_region_union_rectangle (region, &r);
5922
5923                                         cairo_region_get_rectangle (region, num_rectangles - 1, &r);
5924                                         r.x += r.width;
5925                                         r.width = 5;
5926                                         cairo_region_union_rectangle (region, &r);
5927                                 }
5928                         } else if (old_sel->covered_region) {
5929                                 region = cairo_region_copy (old_sel->covered_region);
5930                         } else if (new_sel->covered_region) {
5931                                 region = cairo_region_copy (new_sel->covered_region);
5932                         }
5933                 } else if (old_sel && !new_sel) {
5934                         if (old_sel->covered_region && !cairo_region_is_empty (old_sel->covered_region)) {
5935                                 region = cairo_region_copy (old_sel->covered_region);
5936                         }
5937                 } else if (!old_sel && new_sel) {
5938                         if (new_sel->covered_region && !cairo_region_is_empty (new_sel->covered_region)) {
5939                                 region = cairo_region_copy (new_sel->covered_region);
5940                         }
5941                 } else {
5942                         g_assert_not_reached ();
5943                 }
5944
5945                 /* Redraw the damaged region! */
5946                 if (region) {
5947                         GdkWindow   *bin_window;
5948                         GdkRectangle page_area;
5949                         GtkBorder    border;
5950
5951                         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
5952                         ev_view_get_page_extents (view, cur_page, &page_area, &border);
5953                         cairo_region_translate (region,
5954                                            page_area.x + border.left - view->scroll_x,
5955                                            page_area.y + border.top - view->scroll_y);
5956                         gdk_window_invalidate_region (bin_window, region, TRUE);
5957                         cairo_region_destroy (region);
5958                 }
5959         }
5960
5961         /* Free the old list, now that we're done with it. */
5962         g_list_foreach (old_list, (GFunc) selection_free, NULL);
5963         g_list_free (old_list);
5964 }
5965
5966 static void
5967 compute_selections (EvView          *view,
5968                     EvSelectionStyle style,
5969                     GdkPoint        *start,
5970                     GdkPoint        *stop)
5971 {
5972         GList *list;
5973
5974         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
5975                 list = compute_new_selection_rect (view, start, stop);
5976         else
5977                 list = compute_new_selection_text (view, style, start, stop);
5978         merge_selection_region (view, list);
5979 }
5980
5981 /* Free's the selection.  It's up to the caller to queue redraws if needed.
5982  */
5983 static void
5984 selection_free (EvViewSelection *selection)
5985 {
5986         if (selection->covered_region)
5987                 cairo_region_destroy (selection->covered_region);
5988         g_free (selection);
5989 }
5990
5991 static void
5992 clear_selection (EvView *view)
5993 {
5994         if (view->selection_info.selections) {
5995                 g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5996                 g_list_free (view->selection_info.selections);
5997                 view->selection_info.selections = NULL;
5998
5999                 g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
6000         }
6001         view->selection_info.in_selection = FALSE;
6002         if (view->pixbuf_cache)
6003                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6004 }
6005
6006 void
6007 ev_view_select_all (EvView *view)
6008 {
6009         GList *selections = NULL;
6010         int n_pages, i;
6011
6012         /* Disable selection on rotated pages for the 0.4.0 series */
6013         if (view->rotation != 0)
6014                 return;
6015
6016         clear_selection (view);
6017
6018         n_pages = ev_document_get_n_pages (view->document);
6019         for (i = 0; i < n_pages; i++) {
6020                 gdouble width, height;
6021                 EvViewSelection *selection;
6022
6023                 get_doc_page_size (view, i, &width, &height);
6024
6025                 selection = g_new0 (EvViewSelection, 1);
6026                 selection->page = i;
6027                 selection->style = EV_SELECTION_STYLE_GLYPH;
6028                 selection->rect.x1 = selection->rect.y1 = 0;
6029                 selection->rect.x2 = width;
6030                 selection->rect.y2 = height;
6031
6032                 selections = g_list_append (selections, selection);
6033         }
6034
6035         merge_selection_region (view, selections);
6036         gtk_widget_queue_draw (GTK_WIDGET (view));
6037 }
6038
6039 gboolean
6040 ev_view_get_has_selection (EvView *view)
6041 {
6042         return view->selection_info.selections != NULL;
6043 }
6044
6045 static char *
6046 get_selected_text (EvView *view)
6047 {
6048         GString *text;
6049         GList *l;
6050         gchar *normalized_text;
6051
6052         text = g_string_new (NULL);
6053
6054         ev_document_doc_mutex_lock ();
6055
6056         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6057                 EvViewSelection *selection = (EvViewSelection *)l->data;
6058                 EvPage *page;
6059                 gchar *tmp;
6060
6061                 page = ev_document_get_page (view->document, selection->page);
6062                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6063                                                       page, selection->style,
6064                                                       &(selection->rect));
6065                 g_object_unref (page);
6066                 g_string_append (text, tmp);
6067                 g_free (tmp);
6068         }
6069
6070         ev_document_doc_mutex_unlock ();
6071
6072         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6073         g_string_free (text, TRUE);
6074         return normalized_text;
6075 }
6076
6077 static void
6078 ev_view_clipboard_copy (EvView      *view,
6079                         const gchar *text)
6080 {
6081         GtkClipboard *clipboard;
6082
6083         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6084                                               GDK_SELECTION_CLIPBOARD);
6085         gtk_clipboard_set_text (clipboard, text, -1);
6086 }
6087
6088 void
6089 ev_view_copy (EvView *ev_view)
6090 {
6091         char *text;
6092
6093         if (!EV_IS_SELECTION (ev_view->document))
6094                 return;
6095
6096         text = get_selected_text (ev_view);
6097         ev_view_clipboard_copy (ev_view, text);
6098         g_free (text);
6099 }
6100
6101 static void
6102 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6103                         GtkSelectionData *selection_data,
6104                         guint             info,
6105                         gpointer          data)
6106 {
6107         EvView *ev_view = EV_VIEW (data);
6108
6109         if (ev_view->link_selected) {
6110                 gtk_selection_data_set_text (selection_data,
6111                                              ev_link_action_get_uri (ev_view->link_selected),
6112                                              -1);
6113         } else if (EV_IS_SELECTION (ev_view->document) &&
6114                    ev_view->selection_info.selections) {
6115                 gchar *text;
6116
6117                 text = get_selected_text (ev_view);
6118                 if (text) {
6119                         gtk_selection_data_set_text (selection_data, text, -1);
6120                         g_free (text);
6121                 }
6122         }
6123 }
6124
6125 static void
6126 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6127                           gpointer      data)
6128 {
6129         EvView *view = EV_VIEW (data);
6130
6131         clear_selection (view);
6132         clear_link_selected (view);
6133 }
6134
6135 static void
6136 ev_view_update_primary_selection (EvView *ev_view)
6137 {
6138         GtkClipboard *clipboard;
6139
6140         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6141                                               GDK_SELECTION_PRIMARY);
6142
6143         if (ev_view->selection_info.selections || ev_view->link_selected) {
6144                 GtkTargetList *target_list;
6145                 GtkTargetEntry *targets;
6146                 int n_targets;
6147
6148                 target_list = gtk_target_list_new (NULL, 0);
6149                 gtk_target_list_add_text_targets (target_list, 0);
6150                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6151                 gtk_target_list_unref (target_list);
6152
6153                 if (!gtk_clipboard_set_with_owner (clipboard,
6154                                                    targets, n_targets,
6155                                                    ev_view_primary_get_cb,
6156                                                    ev_view_primary_clear_cb,
6157                                                    G_OBJECT (ev_view)))
6158                         ev_view_primary_clear_cb (clipboard, ev_view);
6159
6160                 gtk_target_table_free (targets, n_targets);
6161         } else {
6162                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6163                         gtk_clipboard_clear (clipboard);
6164         }
6165 }
6166
6167 static void
6168 clear_link_selected (EvView *view)
6169 {
6170         if (view->link_selected) {
6171                 g_object_unref (view->link_selected);
6172                 view->link_selected = NULL;
6173         }
6174 }
6175
6176 void
6177 ev_view_copy_link_address (EvView       *view,
6178                            EvLinkAction *action)
6179 {
6180         clear_link_selected (view);
6181
6182         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6183
6184         view->link_selected = g_object_ref (action);
6185         ev_view_update_primary_selection (view);
6186 }
6187
6188 /*** Cursor operations ***/
6189 static void
6190 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6191 {
6192         GdkCursor *cursor = NULL;
6193         GtkWidget *widget;
6194         GdkWindow *bin_window;
6195
6196         if (view->cursor == new_cursor) {
6197                 return;
6198         }
6199
6200         view->cursor = new_cursor;
6201
6202         bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (view));
6203         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6204         cursor = ev_view_cursor_new (gtk_widget_get_display (widget), new_cursor);
6205         gdk_window_set_cursor (bin_window, cursor);
6206         gdk_flush ();
6207         if (cursor)
6208                 gdk_cursor_unref (cursor);
6209 }
6210
6211 void
6212 ev_view_hide_cursor (EvView *view)
6213 {
6214        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6215 }
6216
6217 void
6218 ev_view_show_cursor (EvView *view)
6219 {
6220        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6221 }
6222
6223 gboolean
6224 ev_view_next_page (EvView *view)
6225 {
6226         int page, n_pages;
6227
6228         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6229
6230         if (!view->document)
6231                 return FALSE;
6232
6233         page = ev_document_model_get_page (view->model);
6234         n_pages = ev_document_get_n_pages (view->document);
6235
6236         if (view->dual_page)
6237                 page = page + 2;
6238         else
6239                 page = page + 1;
6240
6241         if (page < n_pages) {
6242                 ev_document_model_set_page (view->model, page);
6243                 return TRUE;
6244         } else if (view->dual_page && page == n_pages) {
6245                 ev_document_model_set_page (view->model, page - 1);
6246                 return TRUE;
6247         } else {
6248                 return FALSE;
6249         }
6250 }
6251
6252 gboolean
6253 ev_view_previous_page (EvView *view)
6254 {
6255         int page;
6256
6257         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6258
6259         if (!view->document)
6260                 return FALSE;
6261
6262         page = ev_document_model_get_page (view->model);
6263
6264         if (view->dual_page)
6265                 page = page - 2;
6266         else
6267                 page = page - 1;
6268
6269         if (page >= 0) {
6270                 ev_document_model_set_page (view->model, page);
6271                 return TRUE;
6272         } else if (view->dual_page && page == -1) {
6273                 ev_document_model_set_page (view->model, 0);
6274                 return TRUE;
6275         } else {
6276                 return FALSE;
6277         }
6278 }
6279