libview/ev-view.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *  Copyright (C) 2004 Red Hat, Inc
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <math.h>
  25 #include <string.h>
  26
  27 #include <glib/gi18n-lib.h>
  28 #include <gtk/gtk.h>
  29 #include <gdk/gdkkeysyms.h>
  30
  31 #include "ev-mapping-list.h"
  32 #include "ev-document-forms.h"
  33 #include "ev-document-images.h"
  34 #include "ev-document-links.h"
  35 #include "ev-document-layers.h"
  36 #include "ev-document-misc.h"
  37 #include "ev-pixbuf-cache.h"
  38 #include "ev-page-cache.h"
  39 #include "ev-view-marshal.h"
  40 #include "ev-document-annotations.h"
  41 #include "ev-annotation-window.h"
  42 #include "ev-loading-window.h"
  43 #include "ev-view.h"
  44 #include "ev-view-accessible.h"
  45 #include "ev-view-private.h"
  46 #include "ev-view-type-builtins.h"
  47
  48 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  49 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  50 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  51
  52 enum {
  53         SIGNAL_BINDING_ACTIVATED,
  54         SIGNAL_HANDLE_LINK,
  55         SIGNAL_EXTERNAL_LINK,
  56         SIGNAL_POPUP_MENU,
  57         SIGNAL_SELECTION_CHANGED,
  58         SIGNAL_SYNC_SOURCE,
  59         SIGNAL_ANNOT_ADDED,
  60         SIGNAL_LAYERS_CHANGED,
  61         N_SIGNALS
  62 };
  63
  64 enum {
  65         TARGET_DND_URI,
  66         TARGET_DND_TEXT,
  67         TARGET_DND_IMAGE
  68 };
  69
  70 enum {
  71         PROP_0,
  72         PROP_HADJUSTMENT,
  73         PROP_VADJUSTMENT,
  74         PROP_HSCROLL_POLICY,
  75         PROP_VSCROLL_POLICY
  76 };
  77
  78 static guint signals[N_SIGNALS];
  79
  80 typedef enum {
  81         EV_VIEW_FIND_NEXT,
  82         EV_VIEW_FIND_PREV
  83 } EvViewFindDirection;
  84
  85 typedef struct {
  86         GtkWidget  *widget;
  87
  88         /* View coords */
  89         gint        x;
  90         gint        y;
  91
  92         /* Document */
  93         guint       page;
  94         EvRectangle doc_rect;
  95 } EvViewChild;
  96
  97 #define ZOOM_IN_FACTOR  1.2
  98 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  99
 100 #define SCROLL_TIME 150
 101
 102 /*** Scrolling ***/
 103 static void       view_update_range_and_current_page         (EvView             *view);
 104 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 105                                                               guint               keyval,
 106                                                               GdkModifierType modifiers,
 107                                                               GtkScrollType       scroll,
 108                                                               gboolean            horizontal);
 109 static void       ensure_rectangle_is_visible                (EvView             *view,
 110                                                               GdkRectangle       *rect);
 111
 112 /*** Geometry computations ***/
 113 static void       compute_border                             (EvView             *view,
 114                                                               int                 width,
 115                                                               int                 height,
 116                                                               GtkBorder          *border);
 117 static void       get_page_y_offset                          (EvView             *view,
 118                                                               int                 page,
 119                                                               int                *y_offset);
 120 static void       view_rect_to_doc_rect                      (EvView             *view,
 121                                                               GdkRectangle       *view_rect,
 122                                                               GdkRectangle       *page_area,
 123                                                               EvRectangle        *doc_rect);
 124 static void       doc_rect_to_view_rect                      (EvView             *view,
 125                                                               int                 page,
 126                                                               EvRectangle        *doc_rect,
 127                                                               GdkRectangle       *view_rect);
 128 static gboolean   get_dual_even_left                         (EvView             *view);
 129 static void       find_page_at_location                      (EvView             *view,
 130                                                               gdouble             x,
 131                                                               gdouble             y,
 132                                                               gint               *page,
 133                                                               gint               *x_offset,
 134                                                               gint               *y_offset);
 135 static void       doc_point_to_view_point                    (EvView             *view,
 136                                                               int                 page,
 137                                                               EvPoint            *doc_point,
 138                                                               GdkPoint           *view_point);
 139 /*** Hyperrefs ***/
 140 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 141                                                               gdouble             x,
 142                                                               gdouble             y);
 143 static char*      tip_from_link                              (EvView             *view,
 144                                                               EvLink             *link);
 145 /*** Forms ***/
 146 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 147                                                                gdouble            x,
 148                                                                gdouble            y);
 149
 150 /*** Annotations ***/
 151 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 152                                                               gdouble             x,
 153                                                               gdouble             y);
 154 static void          show_annotation_windows                 (EvView             *view,
 155                                                               gint                page);
 156 static void          hide_annotation_windows                 (EvView             *view,
 157                                                               gint                page);
 158 /*** GtkWidget implementation ***/
 159 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 160                                                               GtkRequisition     *requisition);
 161 static void       ev_view_size_request_continuous            (EvView             *view,
 162                                                               GtkRequisition     *requisition);
 163 static void       ev_view_size_request_dual_page             (EvView             *view,
 164                                                               GtkRequisition     *requisition);
 165 static void       ev_view_size_request_single_page           (EvView             *view,
 166                                                               GtkRequisition     *requisition);
 167 static void       ev_view_size_request                       (GtkWidget          *widget,
 168                                                               GtkRequisition     *requisition);
 169 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 170                                                               GtkAllocation      *allocation);
 171 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 172                                                               GdkEventScroll     *event);
 173 static gboolean   ev_view_draw                               (GtkWidget          *widget,
 174                                                               cairo_t            *cr);
 175 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 176 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 177                                                               GdkEventButton     *event);
 178 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 179                                                               GdkEventMotion     *event);
 180 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 181                                                               GdkEventButton     *event);
 182 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 183                                                               GdkEventCrossing   *event);
 184 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 185                                                               GdkEventCrossing   *event);
 186 static void       ev_view_style_updated                      (GtkWidget          *widget);
 187 static void       ev_view_remove_all                         (EvView             *view);
 188
 189 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 190
 191 /*** Drawing ***/
 192 static void       highlight_find_results                     (EvView             *view,
 193                                                               cairo_t            *cr,
 194                                                               int                 page);
 195 static void       highlight_forward_search_results           (EvView             *view,
 196                                                               cairo_t            *cr,
 197                                                               int                 page);
 198 static void       focus_annotation                           (EvView             *view,
 199                                                               cairo_t            *cr,
 200                                                               int                 page,
 201                                                               GdkRectangle       *clip);
 202 static void       draw_one_page                              (EvView             *view,
 203                                                               gint                page,
 204                                                               cairo_t            *cr,
 205                                                               GdkRectangle       *page_area,
 206                                                               GtkBorder          *border,
 207                                                               GdkRectangle       *expose_area,
 208                                                               gboolean           *page_ready);
 209 static void       show_loading_window                        (EvView             *view);
 210 static void       hide_loading_window                        (EvView             *view);
 211 static void       ev_view_reload_page                        (EvView             *view,
 212                                                               gint                page,
 213                                                               cairo_region_t     *region);
 214 static void       ev_view_loading_window_move                (EvView             *view);
 215
 216 /*** Callbacks ***/
 217 static void       ev_view_change_page                        (EvView             *view,
 218                                                               gint                new_page);
 219 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 220                                                               cairo_region_t     *region,
 221                                                               EvView             *view);
 222 static void       ev_view_page_changed_cb                    (EvDocumentModel    *model,
 223                                                               gint                old_page,
 224                                                               gint                new_page,
 225                                                               EvView             *view);
 226 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 227                                                               EvView             *view);
 228
 229 /*** GObject ***/
 230 static void       ev_view_finalize                           (GObject            *object);
 231 static void       ev_view_dispose                            (GObject            *object);
 232 static void       ev_view_class_init                         (EvViewClass        *class);
 233 static void       ev_view_init                               (EvView             *view);
 234
 235 /*** Zoom and sizing ***/
 236 static double   zoom_for_size_fit_width                      (gdouble doc_width,
 237                                                               gdouble doc_height,
 238                                                               int     target_width,
 239                                                               int     target_height);
 240 static double   zoom_for_size_fit_height                     (gdouble doc_width,
 241                                                               gdouble doc_height,
 242                                                               int     target_width,
 243                                                               int     target_height);
 244 static double   zoom_for_size_best_fit                       (gdouble doc_width,
 245                                                               gdouble doc_height,
 246                                                               int     target_width,
 247                                                               int     target_height);
 248 static void     ev_view_zoom_for_size                        (EvView *view,
 249                                                               int     width,
 250                                                               int     height);
 251 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 252                                                                 int     width,
 253                                                                 int     height);
 254 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 255                                                                 int     width,
 256                                                                 int     height);
 257 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 258                                                                 int     width,
 259                                                                 int     height);
 260 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 261                                                                 int     width,
 262                                                                 int     height);
 263 /*** Cursors ***/
 264 static void       ev_view_set_cursor                         (EvView             *view,
 265                                                               EvViewCursor        new_cursor);
 266 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 267                                                               gint x,
 268                                                               gint y);
 269
 270 /*** Find ***/
 271 static gint         ev_view_find_get_n_results               (EvView             *view,
 272                                                               gint                page);
 273 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 274                                                               gint                page,
 275                                                               gint                result);
 276 static void       jump_to_find_result                        (EvView             *view);
 277 static void       jump_to_find_page                          (EvView             *view,
 278                                                               EvViewFindDirection direction,
 279                                                               gint                shift);
 280 /*** Selection ***/
 281 static void       compute_selections                         (EvView             *view,
 282                                                               EvSelectionStyle    style,
 283                                                               GdkPoint           *start,
 284                                                               GdkPoint           *stop);
 285 static void       clear_selection                            (EvView             *view);
 286 static void       clear_link_selected                        (EvView             *view);
 287 static void       selection_free                             (EvViewSelection    *selection);
 288 static char*      get_selected_text                          (EvView             *ev_view);
 289 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 290                                                               GtkSelectionData   *selection_data,
 291                                                               guint               info,
 292                                                               gpointer            data);
 293 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 294                                                               gpointer            data);
 295 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 296
 297 G_DEFINE_TYPE_WITH_CODE (EvView, ev_view, GTK_TYPE_CONTAINER,
 298                          G_IMPLEMENT_INTERFACE (GTK_TYPE_SCROLLABLE, NULL))
 299
 300 /* HeightToPage cache */
 301 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 302
 303 static void
 304 build_height_to_page (EvHeightToPageCache *cache,
 305                       EvDocument          *document,
 306                       gint                 rotation)
 307 {
 308         gboolean swap, uniform, dual_even_left;
 309         int i;
 310         double uniform_height, page_height, next_page_height;
 311         double saved_height;
 312         gdouble u_width, u_height;
 313         gint n_pages;
 314
 315         swap = (rotation == 90 || rotation == 270);
 316
 317         uniform = ev_document_is_page_size_uniform (document);
 318         n_pages = ev_document_get_n_pages (document);
 319         dual_even_left = (n_pages > 2);
 320
 321         g_free (cache->height_to_page);
 322         g_free (cache->dual_height_to_page);
 323
 324         cache->rotation = rotation;
 325         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 326         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 327
 328         if (uniform)
 329                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 330
 331         saved_height = 0;
 332         for (i = 0; i <= n_pages; i++) {
 333                 if (uniform) {
 334                         uniform_height = swap ? u_width : u_height;
 335                         cache->height_to_page[i] = i * uniform_height;
 336                 } else {
 337                         if (i < n_pages) {
 338                                 gdouble w, h;
 339
 340                                 ev_document_get_page_size (document, i, &w, &h);
 341                                 page_height = swap ? w : h;
 342                         } else {
 343                                 page_height = 0;
 344                         }
 345                         cache->height_to_page[i] = saved_height;
 346                         saved_height += page_height;
 347                 }
 348         }
 349
 350         if (dual_even_left && !uniform) {
 351                 gdouble w, h;
 352
 353                 ev_document_get_page_size (document, 0, &w, &h);
 354                 saved_height = swap ? w : h;
 355         } else {
 356                 saved_height = 0;
 357         }
 358
 359         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 360                 if (uniform) {
 361                         uniform_height = swap ? u_width : u_height;
 362                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 363                         if (i + 1 < n_pages + 2)
 364                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 365                 } else {
 366                         if (i + 1 < n_pages) {
 367                                 gdouble w, h;
 368
 369                                 ev_document_get_page_size (document, i + 1, &w, &h);
 370                                 next_page_height = swap ? w : h;
 371                         } else {
 372                                 next_page_height = 0;
 373                         }
 374
 375                         if (i < n_pages) {
 376                                 gdouble w, h;
 377
 378                                 ev_document_get_page_size (document, i, &w, &h);
 379                                 page_height = swap ? w : h;
 380                         } else {
 381                                 page_height = 0;
 382                         }
 383
 384                         if (i + 1 < n_pages + 2) {
 385                                 cache->dual_height_to_page[i] = saved_height;
 386                                 cache->dual_height_to_page[i + 1] = saved_height;
 387                                 saved_height += MAX(page_height, next_page_height);
 388                         } else {
 389                                 cache->dual_height_to_page[i] = saved_height;
 390                         }
 391                 }
 392         }
 393 }
 394
 395 static void
 396 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 397                                     EvDocument          *document,
 398                                     gint                 page,
 399                                     gint                 rotation,
 400                                     gdouble             *height,
 401                                     gdouble             *dual_height)
 402 {
 403         if (cache->rotation != rotation)
 404                 build_height_to_page (cache, document, rotation);
 405
 406         *height = cache->height_to_page[page];
 407         *dual_height = cache->dual_height_to_page[page];
 408 }
 409
 410 static void
 411 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 412 {
 413         if (cache->height_to_page) {
 414                 g_free (cache->height_to_page);
 415                 cache->height_to_page = NULL;
 416         }
 417
 418         if (cache->dual_height_to_page) {
 419                 g_free (cache->dual_height_to_page);
 420                 cache->dual_height_to_page = NULL;
 421         }
 422         g_free (cache);
 423 }
 424
 425 static EvHeightToPageCache *
 426 ev_view_get_height_to_page_cache (EvView *view)
 427 {
 428         EvHeightToPageCache *cache;
 429
 430         if (!view->document)
 431                 return NULL;
 432
 433         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 434         if (!cache) {
 435                 cache = g_new0 (EvHeightToPageCache, 1);
 436                 build_height_to_page (cache, view->document, view->rotation);
 437                 g_object_set_data_full (G_OBJECT (view->document),
 438                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 439                                         cache,
 440                                         (GDestroyNotify)ev_height_to_page_cache_free);
 441         }
 442
 443         return cache;
 444 }
 445
 446 static void
 447 ev_view_get_height_to_page (EvView *view,
 448                             gint    page,
 449                             gint   *height,
 450                             gint   *dual_height)
 451 {
 452         gdouble h, dh;
 453
 454         if (!view->height_to_page_cache)
 455                 return;
 456
 457         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 458                                             view->document,
 459                                             page,
 460                                             view->rotation,
 461                                             &h, &dh);
 462         if (height)
 463                 *height = (gint)(h * view->scale + 0.5);
 464
 465         if (dual_height)
 466                 *dual_height = (gint)(dh * view->scale + 0.5);
 467 }
 468
 469 static gint
 470 ev_view_get_scrollbar_size (EvView        *view,
 471                             GtkOrientation orientation)
 472 {
 473         GtkWidget *widget = GTK_WIDGET (view);
 474         GtkWidget *sb;
 475         GtkWidget *swindow = gtk_widget_get_parent (GTK_WIDGET (view));
 476         GtkAllocation allocation;
 477         GtkRequisition req;
 478         gint spacing;
 479
 480         if (!GTK_IS_SCROLLED_WINDOW (swindow))
 481                 return 0;
 482
 483         gtk_widget_get_allocation (widget, &allocation);
 484
 485         if (orientation == GTK_ORIENTATION_VERTICAL) {
 486                 if (allocation.height >= view->requisition.height)
 487                         sb = gtk_scrolled_window_get_vscrollbar (GTK_SCROLLED_WINDOW (swindow));
 488                 else
 489                         return 0;
 490         } else {
 491                 if (allocation.width >= view->requisition.width)
 492                         sb = gtk_scrolled_window_get_hscrollbar (GTK_SCROLLED_WINDOW (swindow));
 493                 else
 494                         return 0;
 495         }
 496
 497         gtk_widget_style_get (swindow, "scrollbar_spacing", &spacing, NULL);
 498         gtk_widget_get_preferred_size (sb, &req, NULL);
 499
 500         return (orientation == GTK_ORIENTATION_VERTICAL ? req.width : req.height) + spacing;
 501 }
 502
 503 static void
 504 scroll_to_point (EvView        *view,
 505                  gdouble        x,
 506                  gdouble        y,
 507                  GtkOrientation orientation)
 508 {
 509         gdouble page_size;
 510         gdouble upper, lower;
 511
 512         if (orientation == GTK_ORIENTATION_VERTICAL) {
 513                 page_size = gtk_adjustment_get_page_size (view->vadjustment);
 514                 upper = gtk_adjustment_get_upper (view->vadjustment);
 515                 lower = gtk_adjustment_get_lower (view->vadjustment);
 516
 517                 if (view->continuous) {
 518                         gtk_adjustment_clamp_page (view->vadjustment,
 519                                                    y - view->spacing / 2,
 520                                                    y + page_size);
 521                 } else {
 522                         gtk_adjustment_set_value (view->vadjustment,
 523                                                   CLAMP (y, lower, upper - page_size));
 524                 }
 525         } else {
 526                 page_size = gtk_adjustment_get_page_size (view->hadjustment);
 527                 upper = gtk_adjustment_get_upper (view->hadjustment);
 528                 lower = gtk_adjustment_get_lower (view->hadjustment);
 529
 530                 if (view->dual_page) {
 531                         gtk_adjustment_clamp_page (view->hadjustment, x,
 532                                                    x + page_size);
 533                 } else {
 534                         gtk_adjustment_set_value (view->hadjustment,
 535                                                   CLAMP (x, lower, upper - page_size));
 536                 }
 537         }
 538 }
 539
 540 static void
 541 ev_view_scroll_to_page_position (EvView *view, GtkOrientation orientation)
 542 {
 543         gdouble x, y;
 544
 545         if (!view->document)
 546                 return;
 547
 548         if ((orientation == GTK_ORIENTATION_VERTICAL && view->pending_point.y == 0) ||
 549             (orientation == GTK_ORIENTATION_HORIZONTAL && view->pending_point.x == 0)) {
 550                 GdkRectangle page_area;
 551                 GtkBorder    border;
 552
 553                 ev_view_get_page_extents (view, view->current_page, &page_area, &border);
 554                 x = page_area.x;
 555                 y = page_area.y;
 556         } else {
 557                 GdkPoint view_point;
 558
 559                 doc_point_to_view_point (view, view->current_page,
 560                                          &view->pending_point, &view_point);
 561                 x = view_point.x;
 562                 y = view_point.y;
 563         }
 564
 565         scroll_to_point (view, x, y, orientation);
 566 }
 567
 568 static void
 569 ev_view_set_adjustment_values (EvView         *view,
 570                                GtkOrientation  orientation)
 571 {
 572         GtkWidget *widget = GTK_WIDGET (view);
 573         GtkAdjustment *adjustment;
 574         GtkAllocation allocation;
 575         int req_size;
 576         int alloc_size;
 577         gdouble page_size;
 578         gdouble value;
 579         gdouble upper;
 580         double factor;
 581         gint new_value;
 582
 583         gtk_widget_get_allocation (widget, &allocation);
 584
 585         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 586                 req_size = view->requisition.width;
 587                 alloc_size = allocation.width;
 588                 adjustment = view->hadjustment;
 589         } else {
 590                 req_size = view->requisition.height;
 591                 alloc_size = allocation.height;
 592                 adjustment = view->vadjustment;
 593         }
 594
 595         if (!adjustment)
 596                 return;
 597
 598         factor = 1.0;
 599         value = gtk_adjustment_get_value (adjustment);
 600         upper = gtk_adjustment_get_upper (adjustment);
 601         page_size = gtk_adjustment_get_page_size (adjustment);
 602
 603         switch (view->pending_scroll) {
 604                 case SCROLL_TO_KEEP_POSITION:
 605                 case SCROLL_TO_FIND_LOCATION:
 606                         factor = value / upper;
 607                         break;
 608                 case SCROLL_TO_PAGE_POSITION:
 609                         break;
 610                 case SCROLL_TO_CENTER:
 611                         factor = (value + page_size * 0.5) / upper;
 612                         break;
 613         }
 614
 615         upper = MAX (alloc_size, req_size);
 616         page_size = alloc_size;
 617
 618         gtk_adjustment_set_page_size (adjustment, page_size);
 619         gtk_adjustment_set_step_increment (adjustment, alloc_size * 0.1);
 620         gtk_adjustment_set_page_increment (adjustment, alloc_size * 0.9);
 621         gtk_adjustment_set_lower (adjustment, 0);
 622         gtk_adjustment_set_upper (adjustment, upper);
 623
 624         /*
 625          * We add 0.5 to the values before to average out our rounding errors.
 626          */
 627         switch (view->pending_scroll) {
 628                 case SCROLL_TO_KEEP_POSITION:
 629                 case SCROLL_TO_FIND_LOCATION:
 630                         new_value = CLAMP (upper * factor + 0.5, 0, upper - page_size);
 631                         gtk_adjustment_set_value (adjustment, (int)new_value);
 632                         break;
 633                 case SCROLL_TO_PAGE_POSITION:
 634                         ev_view_scroll_to_page_position (view, orientation);
 635                         break;
 636                 case SCROLL_TO_CENTER:
 637                         new_value = CLAMP (upper * factor - page_size * 0.5 + 0.5,
 638                                            0, upper - page_size);
 639                         gtk_adjustment_set_value (adjustment, (int)new_value);
 640                         break;
 641         }
 642
 643         gtk_adjustment_changed (adjustment);
 644 }
 645
 646 static void
 647 view_update_range_and_current_page (EvView *view)
 648 {
 649         gint start = view->start_page;
 650         gint end = view->end_page;
 651
 652         if (ev_document_get_n_pages (view->document) <= 0 ||
 653             !ev_document_check_dimensions (view->document))
 654                 return;
 655
 656         if (view->continuous) {
 657                 GdkRectangle current_area, unused, page_area;
 658                 GtkBorder border;
 659                 gboolean found = FALSE;
 660                 gint area_max = -1, area;
 661                 gint best_current_page = -1;
 662                 int i, j = 0;
 663
 664                 if (!(view->vadjustment && view->hadjustment))
 665                         return;
 666
 667                 current_area.x = gtk_adjustment_get_value (view->hadjustment);
 668                 current_area.width = gtk_adjustment_get_page_size (view->hadjustment);
 669                 current_area.y = gtk_adjustment_get_value (view->vadjustment);
 670                 current_area.height = gtk_adjustment_get_page_size (view->vadjustment);
 671
 672                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 673
 674                         ev_view_get_page_extents (view, i, &page_area, &border);
 675
 676                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 677                                 area = unused.width * unused.height;
 678
 679                                 if (!found) {
 680                                         area_max = area;
 681                                         view->start_page = i;
 682                                         found = TRUE;
 683                                         best_current_page = i;
 684                                 }
 685                                 if (area > area_max) {
 686                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 687                                         area_max = area;
 688                                 }
 689
 690                                 view->end_page = i;
 691                                 j = 0;
 692                         } else if (found && view->current_page <= view->end_page) {
 693                                 if (view->dual_page && j < 1) {
 694                                         /* In dual mode  we stop searching
 695                                          * after two consecutive non-visible pages.
 696                                          */
 697                                         j++;
 698                                         continue;
 699                                 }
 700                                 break;
 701                         }
 702                 }
 703
 704                 if (view->pending_scroll == SCROLL_TO_KEEP_POSITION) {
 705                         best_current_page = MAX (best_current_page, view->start_page);
 706
 707                         if (view->current_page != best_current_page) {
 708                                 view->current_page = best_current_page;
 709                                 hide_loading_window (view);
 710                                 ev_document_model_set_page (view->model, best_current_page);
 711                         }
 712                 }
 713         } else if (view->dual_page) {
 714                 if (view->current_page % 2 == get_dual_even_left (view)) {
 715                         view->start_page = view->current_page;
 716                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 717                                 view->end_page = view->start_page + 1;
 718                         else
 719                                 view->end_page = view->start_page;
 720                 } else {
 721                         if (view->current_page < 1)
 722                                 view->start_page = view->current_page;
 723                         else
 724                                 view->start_page = view->current_page - 1;
 725                         view->end_page = view->current_page;
 726                 }
 727         } else {
 728                 view->start_page = view->current_page;
 729                 view->end_page = view->current_page;
 730         }
 731
 732         if (view->start_page == -1 || view->end_page == -1)
 733                 return;
 734
 735         if (start != view->start_page || end != view->end_page) {
 736                 gint i;
 737
 738                 for (i = start; i < view->start_page && start != -1; i++) {
 739                         hide_annotation_windows (view, i);
 740                 }
 741
 742                 for (i = end; i > view->end_page && end != -1; i--) {
 743                         hide_annotation_windows (view, i);
 744                 }
 745         }
 746
 747         ev_page_cache_set_page_range (view->page_cache,
 748                                       view->start_page,
 749                                       view->end_page);
 750         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 751                                         view->start_page,
 752                                         view->end_page,
 753                                         view->selection_info.selections);
 754
 755         if (ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page))
 756             gtk_widget_queue_draw (GTK_WIDGET (view));
 757 }
 758
 759 static void
 760 ev_view_set_scroll_adjustment (EvView         *view,
 761                                GtkOrientation  orientation,
 762                                GtkAdjustment  *adjustment)
 763 {
 764         GtkAdjustment **to_set;
 765         const gchar    *prop_name;
 766
 767         if (orientation == GTK_ORIENTATION_HORIZONTAL) {
 768                 to_set = &view->hadjustment;
 769                 prop_name = "hadjustment";
 770         } else {
 771                 to_set = &view->vadjustment;
 772                 prop_name = "vadjustment";
 773         }
 774
 775         if (adjustment && adjustment == *to_set)
 776                 return;
 777
 778         if (*to_set) {
 779                 g_signal_handlers_disconnect_by_func (*to_set,
 780                                                       (gpointer) on_adjustment_value_changed,
 781                                                       view);
 782                 g_object_unref (*to_set);
 783         }
 784
 785         if (!adjustment)
 786                 adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
 787         g_signal_connect (adjustment, "value_changed",
 788                           G_CALLBACK (on_adjustment_value_changed),
 789                           view);
 790         *to_set = g_object_ref_sink (adjustment);
 791         ev_view_set_adjustment_values (view, orientation);
 792
 793         g_object_notify (G_OBJECT (view), prop_name);
 794 }
 795
 796 static void
 797 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 798                            guint           keyval,
 799                            GdkModifierType modifiers,
 800                            GtkScrollType   scroll,
 801                            gboolean        horizontal)
 802 {
 803   guint keypad_keyval = keyval - GDK_KEY_Left + GDK_KEY_KP_Left;
 804
 805   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 806                                 "binding_activated", 2,
 807                                 GTK_TYPE_SCROLL_TYPE, scroll,
 808                                 G_TYPE_BOOLEAN, horizontal);
 809   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 810                                 "binding_activated", 2,
 811                                 GTK_TYPE_SCROLL_TYPE, scroll,
 812                                 G_TYPE_BOOLEAN, horizontal);
 813 }
 814
 815 static gdouble
 816 compute_scroll_increment (EvView        *view,
 817                           GtkScrollType  scroll)
 818 {
 819         GtkWidget *widget = GTK_WIDGET (view);
 820         GtkAdjustment *adjustment = view->vadjustment;
 821         cairo_region_t *text_region, *region;
 822         GtkAllocation allocation;
 823         gint page;
 824         GdkRectangle rect;
 825         EvRectangle doc_rect;
 826         GdkRectangle page_area;
 827         GtkBorder border;
 828         gdouble fraction = 1.0;
 829
 830         if (scroll != GTK_SCROLL_PAGE_BACKWARD && scroll != GTK_SCROLL_PAGE_FORWARD)
 831                 return gtk_adjustment_get_page_size (adjustment);
 832
 833         page = scroll == GTK_SCROLL_PAGE_BACKWARD ? view->start_page : view->end_page;
 834
 835         text_region = ev_page_cache_get_text_mapping (view->page_cache, page);
 836         if (!text_region || cairo_region_is_empty (text_region))
 837                 return gtk_adjustment_get_page_size (adjustment);
 838
 839         gtk_widget_get_allocation (widget, &allocation);
 840         ev_view_get_page_extents (view, page, &page_area, &border);
 841         rect.x = page_area.x + view->scroll_x;
 842         rect.y = view->scroll_y + (scroll == GTK_SCROLL_PAGE_BACKWARD ? 5 : allocation.height - 5);
 843         rect.width = page_area.width;
 844         rect.height = 1;
 845         view_rect_to_doc_rect (view, &rect, &page_area, &doc_rect);
 846
 847         /* Convert the doc rectangle into a GdkRectangle */
 848         rect.x = doc_rect.x1;
 849         rect.y = doc_rect.y1;
 850         rect.width = doc_rect.x2 - doc_rect.x1;
 851         rect.height = MAX (1, doc_rect.y2 - doc_rect.y1);
 852         region = cairo_region_create_rectangle (&rect);
 853
 854         cairo_region_intersect (region, text_region);
 855         if (cairo_region_num_rectangles (region)) {
 856                 EvRenderContext *rc;
 857                 EvPage  *ev_page;
 858                 cairo_region_t *sel_region;
 859
 860                 cairo_region_get_rectangle (region, 0, &rect);
 861                 ev_page = ev_document_get_page (view->document, page);
 862                 rc = ev_render_context_new (ev_page, view->rotation, view->scale);
 863                 g_object_unref (ev_page);
 864                 /* Get the selection region to know the height of the line */
 865                 doc_rect.x1 = doc_rect.x2 = rect.x + 0.5;
 866                 doc_rect.y1 = doc_rect.y2 = rect.y + 0.5;
 867
 868                 ev_document_doc_mutex_lock ();
 869                 sel_region = ev_selection_get_selection_region (EV_SELECTION (view->document),
 870                                                                 rc, EV_SELECTION_STYLE_LINE,
 871                                                                 &doc_rect);
 872                 ev_document_doc_mutex_unlock ();
 873
 874                 g_object_unref (rc);
 875
 876                 if (cairo_region_num_rectangles (sel_region) > 0) {
 877                         cairo_region_get_rectangle (sel_region, 0, &rect);
 878                         fraction = 1 - (rect.height / gtk_adjustment_get_page_size (adjustment));
 879                 }
 880                 cairo_region_destroy (sel_region);
 881         }
 882         cairo_region_destroy (region);
 883
 884         return gtk_adjustment_get_page_size (adjustment) * fraction;
 885
 886 }
 887
 888 void
 889 ev_view_scroll (EvView        *view,
 890                 GtkScrollType  scroll,
 891                 gboolean       horizontal)
 892 {
 893         GtkAdjustment *adjustment;
 894         double value, increment;
 895         gdouble upper, lower;
 896         gdouble page_size;
 897         gdouble step_increment;
 898         gboolean first_page = FALSE;
 899         gboolean last_page = FALSE;
 900
 901         view->jump_to_find_result = FALSE;
 902
 903         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
 904                 switch (scroll) {
 905                         case GTK_SCROLL_PAGE_BACKWARD:
 906                         case GTK_SCROLL_STEP_BACKWARD:
 907                                 ev_view_previous_page (view);
 908                                 break;
 909                         case GTK_SCROLL_PAGE_FORWARD:
 910                         case GTK_SCROLL_STEP_FORWARD:
 911                                 ev_view_next_page (view);
 912                                 break;
 913                         default:
 914                                 break;
 915                 }
 916                 return;
 917         }
 918
 919         /* Assign values for increment and vertical adjustment */
 920         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 921         value = gtk_adjustment_get_value (adjustment);
 922         upper = gtk_adjustment_get_upper (adjustment);
 923         lower = gtk_adjustment_get_lower (adjustment);
 924         page_size = gtk_adjustment_get_page_size (adjustment);
 925         step_increment = gtk_adjustment_get_step_increment (adjustment);
 926
 927         /* Assign boolean for first and last page */
 928         if (view->current_page == 0)
 929                 first_page = TRUE;
 930         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 931                 last_page = TRUE;
 932
 933         switch (scroll) {
 934                 case GTK_SCROLL_PAGE_BACKWARD:
 935                         /* Do not jump backwards if at the first page */
 936                         if (value == lower && first_page) {
 937                                 /* Do nothing */
 938                                 /* At the top of a page, assign the upper bound limit of previous page */
 939                         } else if (value == lower) {
 940                                 value = upper - page_size;
 941                                 ev_view_previous_page (view);
 942                                 /* Jump to the top */
 943                         } else {
 944                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_BACKWARD);
 945                                 value = MAX (value - increment, lower);
 946                         }
 947                         break;
 948                 case GTK_SCROLL_PAGE_FORWARD:
 949                         /* Do not jump forward if at the last page */
 950                         if (value == (upper - page_size) && last_page) {
 951                                 /* Do nothing */
 952                         /* At the bottom of a page, assign the lower bound limit of next page */
 953                         } else if (value == (upper - page_size)) {
 954                                 value = 0;
 955                                 ev_view_next_page (view);
 956                         /* Jump to the bottom */
 957                         } else {
 958                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_FORWARD);
 959                                 value = MIN (value + increment, upper - page_size);
 960                         }
 961                         break;
 962                 case GTK_SCROLL_STEP_BACKWARD:
 963                         value -= step_increment;
 964                         break;
 965                 case GTK_SCROLL_STEP_FORWARD:
 966                         value += step_increment;
 967                         break;
 968                 case GTK_SCROLL_STEP_DOWN:
 969                         value -= step_increment / 10;
 970                         break;
 971                 case GTK_SCROLL_STEP_UP:
 972                         value += step_increment / 10;
 973                         break;
 974                 default:
 975                         break;
 976         }
 977
 978         value = CLAMP (value, lower, upper - page_size);
 979
 980         gtk_adjustment_set_value (adjustment, value);
 981 }
 982
 983 #define MARGIN 5
 984
 985 static void
 986 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 987 {
 988         GtkWidget *widget = GTK_WIDGET (view);
 989         GtkAdjustment *adjustment;
 990         GtkAllocation allocation;
 991         gdouble adj_value;
 992         int value;
 993
 994         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 995
 996         gtk_widget_get_allocation (widget, &allocation);
 997
 998         adjustment = view->vadjustment;
 999         adj_value = gtk_adjustment_get_value (adjustment);
1000
1001         if (rect->y < adj_value) {
1002                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->y - MARGIN);
1003                 gtk_adjustment_set_value (view->vadjustment, value);
1004         } else if (rect->y + rect->height > adj_value + allocation.height) {
1005                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->y + rect->height -
1006                              allocation.height + MARGIN);
1007                 gtk_adjustment_set_value (view->vadjustment, value);
1008         }
1009
1010         adjustment = view->hadjustment;
1011         adj_value = gtk_adjustment_get_value (adjustment);
1012
1013         if (rect->x < adj_value) {
1014                 value = MAX (gtk_adjustment_get_lower (adjustment), rect->x - MARGIN);
1015                 gtk_adjustment_set_value (view->hadjustment, value);
1016         } else if (rect->x + rect->height > adj_value + allocation.width) {
1017                 value = MIN (gtk_adjustment_get_upper (adjustment), rect->x + rect->width -
1018                              allocation.width + MARGIN);
1019                 gtk_adjustment_set_value (view->hadjustment, value);
1020         }
1021
1022         gtk_widget_queue_resize (GTK_WIDGET (view));
1023 }
1024
1025 /*** Geometry computations ***/
1026
1027 static void
1028 compute_border (EvView *view, int width, int height, GtkBorder *border)
1029 {
1030         ev_document_misc_get_page_border_size (width, height, border);
1031 }
1032
1033 void
1034 _get_page_size_for_scale_and_rotation (EvDocument *document,
1035                                        gint        page,
1036                                        gdouble     scale,
1037                                        gint        rotation,
1038                                        gint       *page_width,
1039                                        gint       *page_height)
1040 {
1041         gdouble w, h;
1042         gint    width, height;
1043
1044         ev_document_get_page_size (document, page, &w, &h);
1045
1046         width = (gint)(w * scale + 0.5);
1047         height = (gint)(h * scale + 0.5);
1048
1049         if (page_width)
1050                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
1051         if (page_height)
1052                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
1053 }
1054
1055 static void
1056 ev_view_get_page_size (EvView *view,
1057                        gint    page,
1058                        gint   *page_width,
1059                        gint   *page_height)
1060 {
1061         _get_page_size_for_scale_and_rotation (view->document,
1062                                                page,
1063                                                view->scale,
1064                                                view->rotation,
1065                                                page_width,
1066                                                page_height);
1067 }
1068
1069 static void
1070 ev_view_get_max_page_size (EvView *view,
1071                            gint   *max_width,
1072                            gint   *max_height)
1073 {
1074         double w, h;
1075         gint   width, height;
1076
1077         ev_document_get_max_page_size (view->document, &w, &h);
1078
1079         width = (gint)(w * view->scale + 0.5);
1080         height = (gint)(h * view->scale + 0.5);
1081
1082         if (max_width)
1083                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
1084         if (max_height)
1085                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
1086 }
1087
1088 static void
1089 get_page_y_offset (EvView *view, int page, int *y_offset)
1090 {
1091         int max_width, offset;
1092         GtkBorder border;
1093
1094         g_return_if_fail (y_offset != NULL);
1095
1096         ev_view_get_max_page_size (view, &max_width, NULL);
1097         compute_border (view, max_width, max_width, &border);
1098
1099         if (view->dual_page) {
1100                 ev_view_get_height_to_page (view, page, NULL, &offset);
1101                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
1102                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
1103         } else {
1104                 ev_view_get_height_to_page (view, page, &offset, NULL);
1105                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
1106         }
1107
1108         *y_offset = offset;
1109         return;
1110 }
1111
1112 gboolean
1113 ev_view_get_page_extents (EvView       *view,
1114                           gint          page,
1115                           GdkRectangle *page_area,
1116                           GtkBorder    *border)
1117 {
1118         GtkWidget *widget;
1119         int width, height;
1120         GtkAllocation allocation;
1121
1122         widget = GTK_WIDGET (view);
1123         gtk_widget_get_allocation (widget, &allocation);
1124
1125         /* Get the size of the page */
1126         ev_view_get_page_size (view, page, &width, &height);
1127         compute_border (view, width, height, border);
1128         page_area->width = width + border->left + border->right;
1129         page_area->height = height + border->top + border->bottom;
1130
1131         if (view->continuous) {
1132                 gint max_width;
1133                 gint x, y;
1134
1135                 ev_view_get_max_page_size (view, &max_width, NULL);
1136                 max_width = max_width + border->left + border->right;
1137                 /* Get the location of the bounding box */
1138                 if (view->dual_page) {
1139                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1140                         x = x + MAX (0, allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1141                         if (page % 2 == get_dual_even_left (view))
1142                                 x = x + (max_width - width - border->left - border->right);
1143                 } else {
1144                         x = view->spacing;
1145                         x = x + MAX (0, allocation.width - (width + view->spacing * 2)) / 2;
1146                 }
1147
1148                 get_page_y_offset (view, page, &y);
1149
1150                 page_area->x = x;
1151                 page_area->y = y;
1152         } else {
1153                 gint x, y;
1154                 if (view->dual_page) {
1155                         gint width_2, height_2;
1156                         gint max_width = width;
1157                         gint max_height = height;
1158                         GtkBorder overall_border;
1159                         gint other_page;
1160
1161                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1162
1163                         /* First, we get the bounding box of the two pages */
1164                         if (other_page < ev_document_get_n_pages (view->document)
1165                             && (0 <= other_page)) {
1166                                 ev_view_get_page_size (view, other_page,
1167                                                        &width_2, &height_2);
1168                                 if (width_2 > width)
1169                                         max_width = width_2;
1170                                 if (height_2 > height)
1171                                         max_height = height_2;
1172                         }
1173                         compute_border (view, max_width, max_height, &overall_border);
1174
1175                         /* Find the offsets */
1176                         x = view->spacing;
1177                         y = view->spacing;
1178
1179                         /* Adjust for being the left or right page */
1180                         if (page % 2 == get_dual_even_left (view))
1181                                 x = x + max_width - width;
1182                         else
1183                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1184
1185                         y = y + (max_height - height)/2;
1186
1187                         /* Adjust for extra allocation */
1188                         x = x + MAX (0, allocation.width -
1189                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1190                         y = y + MAX (0, allocation.height - (height + view->spacing * 2))/2;
1191                 } else {
1192                         x = view->spacing;
1193                         y = view->spacing;
1194
1195                         /* Adjust for extra allocation */
1196                         x = x + MAX (0, allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1197                         y = y + MAX (0, allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1198                 }
1199
1200                 page_area->x = x;
1201                 page_area->y = y;
1202         }
1203
1204         return TRUE;
1205 }
1206
1207 static void
1208 get_doc_page_size (EvView  *view,
1209                    gint     page,
1210                    gdouble *width,
1211                    gdouble *height)
1212 {
1213         double w, h;
1214
1215         ev_document_get_page_size (view->document, page, &w, &h);
1216         if (view->rotation == 0 || view->rotation == 180) {
1217                 if (width) *width = w;
1218                 if (height) *height = h;
1219         } else {
1220                 if (width) *width = h;
1221                 if (height) *height = w;
1222         }
1223 }
1224
1225 static void
1226 view_point_to_doc_point (EvView *view,
1227                          GdkPoint *view_point,
1228                          GdkRectangle *page_area,
1229                          double  *doc_point_x,
1230                          double  *doc_point_y)
1231 {
1232         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1233         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1234 }
1235
1236 static void
1237 view_rect_to_doc_rect (EvView *view,
1238                        GdkRectangle *view_rect,
1239                        GdkRectangle *page_area,
1240                        EvRectangle  *doc_rect)
1241 {
1242         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1243         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1244         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1245         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1246 }
1247
1248 static void
1249 doc_point_to_view_point (EvView       *view,
1250                          int           page,
1251                          EvPoint      *doc_point,
1252                          GdkPoint     *view_point)
1253 {
1254         GdkRectangle page_area;
1255         GtkBorder border;
1256         double x, y, view_x, view_y;
1257         gdouble width, height;
1258
1259         get_doc_page_size (view, page, &width, &height);
1260
1261         if (view->rotation == 0) {
1262                 x = doc_point->x;
1263                 y = doc_point->y;
1264         } else if (view->rotation == 90) {
1265                 x = width - doc_point->y;
1266                 y = doc_point->x;
1267         } else if (view->rotation == 180) {
1268                 x = width - doc_point->x;
1269                 y = height - doc_point->y;
1270         } else if (view->rotation == 270) {
1271                 x = doc_point->y;
1272                 y = height - doc_point->x;
1273         } else {
1274                 g_assert_not_reached ();
1275         }
1276
1277         ev_view_get_page_extents (view, page, &page_area, &border);
1278
1279         view_x = CLAMP (x * view->scale, 0, page_area.width);
1280         view_y = CLAMP (y * view->scale, 0, page_area.height);
1281         view_point->x = view_x + page_area.x;
1282         view_point->y = view_y + page_area.y;
1283 }
1284
1285 static void
1286 doc_rect_to_view_rect (EvView       *view,
1287                        int           page,
1288                        EvRectangle  *doc_rect,
1289                        GdkRectangle *view_rect)
1290 {
1291         GdkRectangle page_area;
1292         GtkBorder border;
1293         double x, y, w, h;
1294         gdouble width, height;
1295
1296         get_doc_page_size (view, page, &width, &height);
1297
1298         if (view->rotation == 0) {
1299                 x = doc_rect->x1;
1300                 y = doc_rect->y1;
1301                 w = doc_rect->x2 - doc_rect->x1;
1302                 h = doc_rect->y2 - doc_rect->y1;
1303         } else if (view->rotation == 90) {
1304                 x = width - doc_rect->y2;
1305                 y = doc_rect->x1;
1306                 w = doc_rect->y2 - doc_rect->y1;
1307                 h = doc_rect->x2 - doc_rect->x1;
1308         } else if (view->rotation == 180) {
1309                 x = width - doc_rect->x2;
1310                 y = height - doc_rect->y2;
1311                 w = doc_rect->x2 - doc_rect->x1;
1312                 h = doc_rect->y2 - doc_rect->y1;
1313         } else if (view->rotation == 270) {
1314                 x = doc_rect->y1;
1315                 y = height - doc_rect->x2;
1316                 w = doc_rect->y2 - doc_rect->y1;
1317                 h = doc_rect->x2 - doc_rect->x1;
1318         } else {
1319                 g_assert_not_reached ();
1320         }
1321
1322         ev_view_get_page_extents (view, page, &page_area, &border);
1323
1324         view_rect->x = x * view->scale + page_area.x;
1325         view_rect->y = y * view->scale + page_area.y;
1326         view_rect->width = w * view->scale;
1327         view_rect->height = h * view->scale;
1328 }
1329
1330 static gboolean
1331 get_dual_even_left (EvView *view)
1332 {
1333         return (ev_document_get_n_pages (view->document) > 2);
1334 }
1335
1336 static void
1337 find_page_at_location (EvView  *view,
1338                        gdouble  x,
1339                        gdouble  y,
1340                        gint    *page,
1341                        gint    *x_offset,
1342                        gint    *y_offset)
1343 {
1344         int i;
1345
1346         if (view->document == NULL)
1347                 return;
1348
1349         g_assert (page);
1350         g_assert (x_offset);
1351         g_assert (y_offset);
1352
1353         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1354                 GdkRectangle page_area;
1355                 GtkBorder border;
1356
1357                 if (! ev_view_get_page_extents (view, i, &page_area, &border))
1358                         continue;
1359
1360                 if ((x >= page_area.x + border.left) &&
1361                     (x < page_area.x + page_area.width - border.right) &&
1362                     (y >= page_area.y + border.top) &&
1363                     (y < page_area.y + page_area.height - border.bottom)) {
1364                         *page = i;
1365                         *x_offset = x - (page_area.x + border.left);
1366                         *y_offset = y - (page_area.y + border.top);
1367                         return;
1368                 }
1369         }
1370
1371         *page = -1;
1372 }
1373
1374 static gboolean
1375 location_in_text (EvView  *view,
1376                   gdouble  x,
1377                   gdouble  y)
1378 {
1379         cairo_region_t *region;
1380         gint page = -1;
1381         gint x_offset = 0, y_offset = 0;
1382
1383         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1384
1385         if (page == -1)
1386                 return FALSE;
1387
1388         region = ev_page_cache_get_text_mapping (view->page_cache, page);
1389
1390         if (region)
1391                 return cairo_region_contains_point (region, x_offset / view->scale, y_offset / view->scale);
1392         else
1393                 return FALSE;
1394 }
1395
1396 static gboolean
1397 location_in_selected_text (EvView  *view,
1398                            gdouble  x,
1399                            gdouble  y)
1400 {
1401         gint page = -1;
1402         gint x_offset = 0, y_offset = 0;
1403         EvViewSelection *selection;
1404         GList *l = NULL;
1405
1406         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1407                 selection = (EvViewSelection *)l->data;
1408
1409                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1410
1411                 if (page != selection->page)
1412                         continue;
1413
1414                 if (selection->covered_region &&
1415                     cairo_region_contains_point (selection->covered_region, x_offset, y_offset))
1416                         return TRUE;
1417         }
1418
1419         return FALSE;
1420 }
1421
1422 static gboolean
1423 get_doc_point_from_offset (EvView *view,
1424                            gint    page,
1425                            gint    x_offset,
1426                            gint    y_offset,
1427                            gint   *x_new,
1428                            gint   *y_new)
1429 {
1430         gdouble width, height;
1431         double x, y;
1432
1433         get_doc_page_size (view, page, &width, &height);
1434
1435         x_offset = x_offset / view->scale;
1436         y_offset = y_offset / view->scale;
1437
1438         if (view->rotation == 0) {
1439                 x = x_offset;
1440                 y = y_offset;
1441         } else if (view->rotation == 90) {
1442                 x = y_offset;
1443                 y = width - x_offset;
1444         } else if (view->rotation == 180) {
1445                 x = width - x_offset;
1446                 y = height - y_offset;
1447         } else if (view->rotation == 270) {
1448                 x = height - y_offset;
1449                 y = x_offset;
1450         } else {
1451                 g_assert_not_reached ();
1452         }
1453
1454         *x_new = x;
1455         *y_new = y;
1456
1457         return TRUE;
1458 }
1459
1460 static gboolean
1461 get_doc_point_from_location (EvView  *view,
1462                              gdouble  x,
1463                              gdouble  y,
1464                              gint    *page,
1465                              gint    *x_new,
1466                              gint    *y_new)
1467 {
1468         gint x_offset = 0, y_offset = 0;
1469
1470         x += view->scroll_x;
1471         y += view->scroll_y;
1472         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1473         if (*page == -1)
1474                 return FALSE;
1475
1476         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1477 }
1478
1479 static void
1480 ev_view_get_area_from_mapping (EvView        *view,
1481                                guint          page,
1482                                EvMappingList *mapping_list,
1483                                gconstpointer  data,
1484                                GdkRectangle  *area)
1485 {
1486         EvMapping *mapping;
1487
1488         mapping = ev_mapping_list_find (mapping_list, data);
1489         doc_rect_to_view_rect (view, page, &mapping->area, area);
1490         area->x -= view->scroll_x;
1491         area->y -= view->scroll_y;
1492 }
1493
1494 static void
1495 ev_view_put (EvView      *view,
1496              GtkWidget   *child_widget,
1497              gint         x,
1498              gint         y,
1499              guint        page,
1500              EvRectangle *doc_rect)
1501 {
1502         EvViewChild *child;
1503
1504         child = g_slice_new (EvViewChild);
1505
1506         child->widget = child_widget;
1507         child->x = x;
1508         child->y = y;
1509         child->page = page;
1510         child->doc_rect = *doc_rect;
1511
1512         gtk_widget_set_parent (child_widget, GTK_WIDGET (view));
1513         view->children = g_list_append (view->children, child);
1514 }
1515
1516 static void
1517 ev_view_put_to_doc_rect (EvView      *view,
1518                          GtkWidget   *child_widget,
1519                          guint        page,
1520                          EvRectangle *doc_rect)
1521 {
1522         GdkRectangle area;
1523
1524         doc_rect_to_view_rect (view, page, doc_rect, &area);
1525         area.x -= view->scroll_x;
1526         area.y -= view->scroll_y;
1527         ev_view_put (view, child_widget, area.x, area.y, page, doc_rect);
1528 }
1529
1530 /*** Hyperref ***/
1531 static EvLink *
1532 ev_view_get_link_at_location (EvView  *view,
1533                               gdouble  x,
1534                               gdouble  y)
1535 {
1536         gint page = -1;
1537         gint x_new = 0, y_new = 0;
1538         EvMappingList *link_mapping;
1539
1540         if (!EV_IS_DOCUMENT_LINKS (view->document))
1541                 return NULL;
1542
1543         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1544                 return NULL;
1545
1546         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
1547
1548         if (link_mapping)
1549                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1550         else
1551                 return NULL;
1552 }
1553
1554 static void
1555 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1556 {
1557         EvPoint doc_point;
1558         gdouble zoom, left, top;
1559         gboolean change_left, change_top;
1560         GtkAllocation allocation;
1561
1562         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1563
1564         left = ev_link_dest_get_left (dest, &change_left);
1565         top = ev_link_dest_get_top (dest, &change_top);
1566
1567         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1568                                        ev_link_dest_get_bottom (dest) - top,
1569                                        allocation.width,
1570                                        allocation.height);
1571
1572         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1573         ev_document_model_set_scale (view->model, zoom);
1574
1575         doc_point.x = change_left ? left : 0;
1576         doc_point.y = change_top ? top : 0;
1577         view->pending_point = doc_point;
1578
1579         ev_view_change_page (view, ev_link_dest_get_page (dest));
1580 }
1581
1582 static void
1583 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1584 {
1585         EvPoint doc_point;
1586         gdouble doc_width, doc_height;
1587         gint page;
1588         double zoom, left;
1589         gboolean change_left;
1590         GtkAllocation allocation;
1591
1592         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1593
1594         page = ev_link_dest_get_page (dest);
1595         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1596
1597         left = ev_link_dest_get_left (dest, &change_left);
1598         doc_point.x = change_left ? left : 0;
1599         doc_point.y = 0;
1600
1601         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1602                                          allocation.width,
1603                                          allocation.height);
1604
1605         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1606         ev_document_model_set_scale (view->model, zoom);
1607
1608         view->pending_point = doc_point;
1609
1610         ev_view_change_page (view, page);
1611 }
1612
1613 static void
1614 goto_fith_dest (EvView *view, EvLinkDest *dest)
1615 {
1616         EvPoint doc_point;
1617         gdouble doc_width, doc_height;
1618         gint page;
1619         gdouble zoom, top;
1620         gboolean change_top;
1621         GtkAllocation allocation;
1622
1623         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1624
1625         page = ev_link_dest_get_page (dest);
1626         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1627
1628         top = ev_link_dest_get_top (dest, &change_top);
1629
1630         doc_point.x = 0;
1631         doc_point.y = change_top ? top : 0;
1632
1633         zoom = zoom_for_size_fit_width (doc_width, top,
1634                                         allocation.width,
1635                                         allocation.height);
1636
1637         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1638         ev_document_model_set_scale (view->model, zoom);
1639
1640         view->pending_point = doc_point;
1641
1642         ev_view_change_page (view, page);
1643 }
1644
1645 static void
1646 goto_fit_dest (EvView *view, EvLinkDest *dest)
1647 {
1648         double zoom;
1649         gdouble doc_width, doc_height;
1650         int page;
1651         GtkAllocation allocation;
1652
1653         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
1654
1655         page = ev_link_dest_get_page (dest);
1656         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1657
1658         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1659                                        allocation.width,
1660                                        allocation.height);
1661
1662         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1663         ev_document_model_set_scale (view->model, zoom);
1664
1665         ev_view_change_page (view, page);
1666 }
1667
1668 static void
1669 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1670 {
1671         EvPoint doc_point;
1672         gint page;
1673         gdouble zoom, left, top;
1674         gboolean change_zoom, change_left, change_top;
1675
1676         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1677         page = ev_link_dest_get_page (dest);
1678
1679         if (change_zoom && zoom > 1) {
1680                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1681                 ev_document_model_set_scale (view->model, zoom);
1682         }
1683
1684         left = ev_link_dest_get_left (dest, &change_left);
1685         top = ev_link_dest_get_top (dest, &change_top);
1686
1687         doc_point.x = change_left ? left : 0;
1688         doc_point.y = change_top ? top : 0;
1689         view->pending_point = doc_point;
1690
1691         ev_view_change_page (view, page);
1692 }
1693
1694 static void
1695 goto_dest (EvView *view, EvLinkDest *dest)
1696 {
1697         EvLinkDestType type;
1698         int page, n_pages, current_page;
1699
1700         page = ev_link_dest_get_page (dest);
1701         n_pages = ev_document_get_n_pages (view->document);
1702
1703         if (page < 0 || page >= n_pages)
1704                 return;
1705
1706         current_page = view->current_page;
1707
1708         type = ev_link_dest_get_dest_type (dest);
1709
1710         switch (type) {
1711                 case EV_LINK_DEST_TYPE_PAGE:
1712                         ev_document_model_set_page (view->model, page);
1713                         break;
1714                 case EV_LINK_DEST_TYPE_FIT:
1715                         goto_fit_dest (view, dest);
1716                         break;
1717                 case EV_LINK_DEST_TYPE_FITH:
1718                         goto_fith_dest (view, dest);
1719                         break;
1720                 case EV_LINK_DEST_TYPE_FITV:
1721                         goto_fitv_dest (view, dest);
1722                         break;
1723                 case EV_LINK_DEST_TYPE_FITR:
1724                         goto_fitr_dest (view, dest);
1725                         break;
1726                 case EV_LINK_DEST_TYPE_XYZ:
1727                         goto_xyz_dest (view, dest);
1728                         break;
1729                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1730                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1731                         break;
1732                 default:
1733                         g_assert_not_reached ();
1734         }
1735
1736         if (current_page != view->current_page)
1737                 ev_document_model_set_page (view->model, view->current_page);
1738 }
1739
1740 static void
1741 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1742 {
1743         EvLinkDestType type;
1744
1745         type = ev_link_dest_get_dest_type (dest);
1746
1747         if (type == EV_LINK_DEST_TYPE_NAMED) {
1748                 EvLinkDest  *dest2;
1749                 const gchar *named_dest;
1750
1751                 named_dest = ev_link_dest_get_named_dest (dest);
1752                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1753                                                           named_dest);
1754                 if (dest2) {
1755                         goto_dest (view, dest2);
1756                         g_object_unref (dest2);
1757                 }
1758
1759                 return;
1760         }
1761
1762         goto_dest (view, dest);
1763 }
1764
1765 void
1766 ev_view_handle_link (EvView *view, EvLink *link)
1767 {
1768         EvLinkAction    *action = NULL;
1769         EvLinkActionType type;
1770
1771         action = ev_link_get_action (link);
1772         if (!action)
1773                 return;
1774
1775         type = ev_link_action_get_action_type (action);
1776
1777         switch (type) {
1778                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1779                         EvLinkDest *dest;
1780
1781                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1782
1783                         dest = ev_link_action_get_dest (action);
1784                         ev_view_goto_dest (view, dest);
1785                 }
1786                         break;
1787                 case EV_LINK_ACTION_TYPE_LAYERS_STATE: {
1788                         GList            *show, *hide, *toggle;
1789                         GList            *l;
1790                         EvDocumentLayers *document_layers;
1791
1792                         document_layers = EV_DOCUMENT_LAYERS (view->document);
1793
1794                         show = ev_link_action_get_show_list (action);
1795                         for (l = show; l; l = g_list_next (l)) {
1796                                 ev_document_layers_show_layer (document_layers, EV_LAYER (l->data));
1797                         }
1798
1799                         hide = ev_link_action_get_hide_list (action);
1800                         for (l = hide; l; l = g_list_next (l)) {
1801                                 ev_document_layers_hide_layer (document_layers, EV_LAYER (l->data));
1802                         }
1803
1804                         toggle = ev_link_action_get_toggle_list (action);
1805                         for (l = toggle; l; l = g_list_next (l)) {
1806                                 EvLayer *layer = EV_LAYER (l->data);
1807
1808                                 if (ev_document_layers_layer_is_visible (document_layers, layer)) {
1809                                         ev_document_layers_hide_layer (document_layers, layer);
1810                                 } else {
1811                                         ev_document_layers_show_layer (document_layers, layer);
1812                                 }
1813                         }
1814
1815                         g_signal_emit (view, signals[SIGNAL_LAYERS_CHANGED], 0);
1816                         ev_view_reload_page (view, view->current_page, NULL);
1817                 }
1818                         break;
1819                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1820                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1821                 case EV_LINK_ACTION_TYPE_LAUNCH:
1822                 case EV_LINK_ACTION_TYPE_NAMED:
1823                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1824                         break;
1825         }
1826 }
1827
1828 static char *
1829 tip_from_action_named (EvLinkAction *action)
1830 {
1831         const gchar *name = ev_link_action_get_name (action);
1832
1833         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1834                 return g_strdup (_("Go to first page"));
1835         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1836                 return g_strdup (_("Go to previous page"));
1837         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1838                 return g_strdup (_("Go to next page"));
1839         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1840                 return g_strdup (_("Go to last page"));
1841         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1842                 return g_strdup (_("Go to page"));
1843         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1844                 return g_strdup (_("Find"));
1845         }
1846
1847         return NULL;
1848 }
1849
1850 static char *
1851 tip_from_link (EvView *view, EvLink *link)
1852 {
1853         EvLinkAction *action;
1854         EvLinkActionType type;
1855         char *msg = NULL;
1856         char *page_label;
1857         const char *title;
1858
1859         action = ev_link_get_action (link);
1860         title = ev_link_get_title (link);
1861
1862         if (!action)
1863                 return title ? g_strdup (title) : NULL;
1864
1865         type = ev_link_action_get_action_type (action);
1866
1867         switch (type) {
1868                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1869                         page_label = ev_document_links_get_dest_page_label (EV_DOCUMENT_LINKS (view->document),
1870                                                                             ev_link_action_get_dest (action));
1871                         if (page_label) {
1872                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1873                                 g_free (page_label);
1874                         }
1875                         break;
1876                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1877                         if (title) {
1878                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1879                                                        ev_link_action_get_filename (action));
1880                         } else {
1881                                 msg = g_strdup_printf (_("Go to file “%s”"),
1882                                                        ev_link_action_get_filename (action));
1883                         }
1884                         break;
1885                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1886                         msg = g_strdup (ev_link_action_get_uri (action));
1887                         break;
1888                 case EV_LINK_ACTION_TYPE_LAUNCH:
1889                         msg = g_strdup_printf (_("Launch %s"),
1890                                                ev_link_action_get_filename (action));
1891                         break;
1892                 case EV_LINK_ACTION_TYPE_NAMED:
1893                         msg = tip_from_action_named (action);
1894                         break;
1895                 default:
1896                         if (title)
1897                                 msg = g_strdup (title);
1898                         break;
1899         }
1900
1901         return msg;
1902 }
1903
1904 static void
1905 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1906 {
1907         EvLink       *link;
1908         EvFormField  *field;
1909         EvAnnotation *annot = NULL;
1910
1911         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1912                 return;
1913
1914         if (view->adding_annot) {
1915                 if (view->cursor != EV_VIEW_CURSOR_ADD)
1916                         ev_view_set_cursor (view, EV_VIEW_CURSOR_ADD);
1917                 return;
1918         }
1919
1920         if (view->drag_info.in_drag) {
1921                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1922                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1923                 return;
1924         }
1925
1926         if (view->scroll_info.autoscrolling) {
1927                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1928                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1929                 return;
1930         }
1931
1932         link = ev_view_get_link_at_location (view, x, y);
1933         if (link) {
1934                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1935         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1936                 if (field->is_read_only) {
1937                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1938                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1939                             view->cursor == EV_VIEW_CURSOR_DRAG)
1940                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1941                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1942                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1943                 } else {
1944                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1945                 }
1946         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1947                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1948         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1949                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1950         } else {
1951                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1952                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1953                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1954                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL ||
1955                     view->cursor == EV_VIEW_CURSOR_ADD)
1956                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1957         }
1958
1959         if (link || annot)
1960                 g_object_set (view, "has-tooltip", TRUE, NULL);
1961 }
1962
1963 /*** Images ***/
1964 static EvImage *
1965 ev_view_get_image_at_location (EvView  *view,
1966                                gdouble  x,
1967                                gdouble  y)
1968 {
1969         gint page = -1;
1970         gint x_new = 0, y_new = 0;
1971         EvMappingList *image_mapping;
1972
1973         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1974                 return NULL;
1975
1976         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1977                 return NULL;
1978
1979         image_mapping = ev_page_cache_get_image_mapping (view->page_cache, page);
1980
1981         if (image_mapping)
1982                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1983         else
1984                 return NULL;
1985 }
1986
1987 /*** Forms ***/
1988 static EvFormField *
1989 ev_view_get_form_field_at_location (EvView  *view,
1990                                     gdouble  x,
1991                                     gdouble  y)
1992 {
1993         gint page = -1;
1994         gint x_new = 0, y_new = 0;
1995         EvMappingList *forms_mapping;
1996
1997         if (!EV_IS_DOCUMENT_FORMS (view->document))
1998                 return NULL;
1999
2000         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2001                 return NULL;
2002
2003         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache, page);
2004
2005         if (forms_mapping)
2006                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
2007         else
2008                 return NULL;
2009 }
2010
2011 static cairo_region_t *
2012 ev_view_form_field_get_region (EvView      *view,
2013                                EvFormField *field)
2014 {
2015         GdkRectangle   view_area;
2016         EvMappingList *forms_mapping;
2017
2018         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2019                                                               field->page->index);
2020         ev_view_get_area_from_mapping (view, field->page->index,
2021                                        forms_mapping,
2022                                        field, &view_area);
2023
2024         return cairo_region_create_rectangle (&view_area);
2025 }
2026
2027 static gboolean
2028 ev_view_forms_remove_widgets (EvView *view)
2029 {
2030         ev_view_remove_all (view);
2031
2032         return FALSE;
2033 }
2034
2035 static void
2036 ev_view_form_field_destroy (GtkWidget *widget,
2037                             EvView    *view)
2038 {
2039         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
2040 }
2041
2042 static GtkWidget *
2043 ev_view_form_field_button_create_widget (EvView      *view,
2044                                          EvFormField *field)
2045 {
2046         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
2047         cairo_region_t    *field_region = NULL;
2048
2049         switch (field_button->type) {
2050                 case EV_FORM_FIELD_BUTTON_PUSH:
2051                         return NULL;
2052                 case EV_FORM_FIELD_BUTTON_CHECK:
2053                 case EV_FORM_FIELD_BUTTON_RADIO: {
2054                         gboolean       state;
2055                         EvMappingList *forms_mapping;
2056                         GList         *l;
2057
2058                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
2059                                                                                field);
2060
2061                         /* FIXME: it actually depends on NoToggleToOff flags */
2062                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
2063                             state && field_button->state)
2064                                 return NULL;
2065
2066                         field_region = ev_view_form_field_get_region (view, field);
2067
2068                         /* For radio buttons and checkbox buttons that are in a set
2069                          * we need to update also the region for the current selected item
2070                          */
2071                         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2072                                                                               field->page->index);
2073                         for (l = ev_mapping_list_get_list (forms_mapping); l; l = g_list_next (l)) {
2074                                 EvFormField *button = ((EvMapping *)(l->data))->data;
2075                                 cairo_region_t *button_region;
2076
2077                                 if (button->id == field->id)
2078                                         continue;
2079
2080                                 /* FIXME: only buttons in the same group should be updated */
2081                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
2082                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
2083                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
2084                                         continue;
2085
2086                                 button_region = ev_view_form_field_get_region (view, button);
2087                                 cairo_region_union (field_region, button_region);
2088                                 cairo_region_destroy (button_region);
2089                         }
2090
2091                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
2092                                                                        field, !state);
2093                         field_button->state = !state;
2094                 }
2095                         break;
2096         }
2097
2098         ev_view_reload_page (view, field->page->index, field_region);
2099         cairo_region_destroy (field_region);
2100
2101         return NULL;
2102 }
2103
2104 static void
2105 ev_view_form_field_text_save (EvView    *view,
2106                               GtkWidget *widget)
2107 {
2108         EvFormField *field;
2109
2110         if (!view->document)
2111                 return;
2112
2113         field = g_object_get_data (G_OBJECT (widget), "form-field");
2114
2115         if (field->changed) {
2116                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2117                 cairo_region_t  *field_region;
2118
2119                 field_region = ev_view_form_field_get_region (view, field);
2120
2121                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
2122                                                             field, field_text->text);
2123                 field->changed = FALSE;
2124                 ev_view_reload_page (view, field->page->index, field_region);
2125                 cairo_region_destroy (field_region);
2126         }
2127 }
2128
2129 static void
2130 ev_view_form_field_text_changed (GtkWidget   *widget,
2131                                  EvFormField *field)
2132 {
2133         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2134         gchar           *text = NULL;
2135
2136         if (GTK_IS_ENTRY (widget)) {
2137                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
2138         } else if (GTK_IS_TEXT_BUFFER (widget)) {
2139                 GtkTextIter start, end;
2140
2141                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
2142                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
2143                                                  &start, &end, FALSE);
2144         }
2145
2146         if (!field_text->text ||
2147             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
2148                 g_free (field_text->text);
2149                 field_text->text = text;
2150                 field->changed = TRUE;
2151         }
2152 }
2153
2154 static GtkWidget *
2155 ev_view_form_field_text_create_widget (EvView      *view,
2156                                        EvFormField *field)
2157 {
2158         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2159         GtkWidget       *text = NULL;
2160         gchar           *txt;
2161
2162         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2163                                                           field);
2164
2165         switch (field_text->type) {
2166                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2167                         /* TODO */
2168                 case EV_FORM_FIELD_TEXT_NORMAL:
2169                         text = gtk_entry_new ();
2170                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2171                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2172                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2173
2174                         if (txt) {
2175                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2176                                 g_free (txt);
2177                         }
2178
2179                         g_signal_connect (text, "changed",
2180                                           G_CALLBACK (ev_view_form_field_text_changed),
2181                                           field);
2182                         g_signal_connect_after (text, "activate",
2183                                                 G_CALLBACK (ev_view_form_field_destroy),
2184                                                 view);
2185                         break;
2186                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2187                         GtkTextBuffer *buffer;
2188
2189                         text = gtk_text_view_new ();
2190                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2191
2192                         if (txt) {
2193                                 gtk_text_buffer_set_text (buffer, txt, -1);
2194                                 g_free (txt);
2195                         }
2196
2197                         g_signal_connect (buffer, "changed",
2198                                           G_CALLBACK (ev_view_form_field_text_changed),
2199                                           field);
2200                 }
2201                         break;
2202         }
2203
2204         g_object_weak_ref (G_OBJECT (text),
2205                            (GWeakNotify)ev_view_form_field_text_save,
2206                            view);
2207
2208         return text;
2209 }
2210
2211 static void
2212 ev_view_form_field_choice_save (EvView    *view,
2213                                 GtkWidget *widget)
2214 {
2215         EvFormField *field;
2216
2217         if (!view->document)
2218                 return;
2219
2220         field = g_object_get_data (G_OBJECT (widget), "form-field");
2221
2222         if (field->changed) {
2223                 GList             *l;
2224                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2225                 cairo_region_t    *field_region;
2226
2227                 field_region = ev_view_form_field_get_region (view, field);
2228
2229                 if (field_choice->is_editable) {
2230                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2231                                                                       field, field_choice->text);
2232                 } else {
2233                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2234                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2235                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2236                                                                                  field,
2237                                                                                  GPOINTER_TO_INT (l->data));
2238                         }
2239                 }
2240                 field->changed = FALSE;
2241                 ev_view_reload_page (view, field->page->index, field_region);
2242                 cairo_region_destroy (field_region);
2243         }
2244 }
2245
2246 static void
2247 ev_view_form_field_choice_changed (GtkWidget   *widget,
2248                                    EvFormField *field)
2249 {
2250         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2251
2252         if (GTK_IS_COMBO_BOX (widget)) {
2253                 gint item;
2254
2255                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2256                 if (!field_choice->selected_items ||
2257                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2258                         g_list_free (field_choice->selected_items);
2259                         field_choice->selected_items = NULL;
2260                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2261                                                                        GINT_TO_POINTER (item));
2262                         field->changed = TRUE;
2263                 }
2264
2265                 if (gtk_combo_box_get_has_entry (GTK_COMBO_BOX (widget))) {
2266                         const gchar *text;
2267
2268                         text = gtk_entry_get_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (widget))));
2269                         if (!field_choice->text ||
2270                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2271                                 g_free (field_choice->text);
2272                                 field_choice->text = g_strdup (text);
2273                                 field->changed = TRUE;
2274                         }
2275                 }
2276         } else if (GTK_IS_TREE_SELECTION (widget)) {
2277                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2278                 GtkTreeModel     *model;
2279                 GList            *items, *l;
2280
2281                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2282                 g_list_free (field_choice->selected_items);
2283                 field_choice->selected_items = NULL;
2284
2285                 for (l = items; l && l->data; l = g_list_next (l)) {
2286                         GtkTreeIter  iter;
2287                         GtkTreePath *path = (GtkTreePath *)l->data;
2288                         gint         item;
2289
2290                         gtk_tree_model_get_iter (model, &iter, path);
2291                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2292
2293                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2294                                                                        GINT_TO_POINTER (item));
2295
2296                         gtk_tree_path_free (path);
2297                 }
2298
2299                 g_list_free (items);
2300
2301                 field->changed = TRUE;
2302         }
2303 }
2304
2305 static GtkWidget *
2306 ev_view_form_field_choice_create_widget (EvView      *view,
2307                                          EvFormField *field)
2308 {
2309         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2310         GtkWidget         *choice;
2311         GtkTreeModel      *model;
2312         gint               n_items, i;
2313         gint               selected_item = 0;
2314
2315         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2316                                                                    field);
2317         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2318         for (i = 0; i < n_items; i++) {
2319                 GtkTreeIter iter;
2320                 gchar      *item;
2321
2322                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2323                                                                      field, i);
2324                 if (ev_document_forms_form_field_choice_is_item_selected (
2325                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2326                         selected_item = i;
2327                         /* FIXME: we need a get_selected_items function in poppler */
2328                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2329                                                                        GINT_TO_POINTER (i));
2330                 }
2331
2332                 if (item) {
2333                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2334                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2335                                             0, item,
2336                                             1, i,
2337                                             -1);
2338                         g_free (item);
2339                 }
2340         }
2341
2342         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2343                 GtkCellRenderer  *renderer;
2344                 GtkWidget        *tree_view;
2345                 GtkTreeSelection *selection;
2346
2347                 tree_view = gtk_tree_view_new_with_model (model);
2348                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2349
2350                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2351                 if (field_choice->multi_select) {
2352                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2353                 }
2354
2355                 /* TODO: set selected items */
2356
2357                 renderer = gtk_cell_renderer_text_new ();
2358                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2359                                                              0,
2360                                                              "choix", renderer,
2361                                                              "text", 0,
2362                                                              NULL);
2363
2364                 choice = gtk_scrolled_window_new (NULL, NULL);
2365                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2366                                                 GTK_POLICY_AUTOMATIC,
2367                                                 GTK_POLICY_AUTOMATIC);
2368                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2369                 gtk_widget_show (tree_view);
2370
2371                 g_signal_connect (selection, "changed",
2372                                   G_CALLBACK (ev_view_form_field_choice_changed),
2373                                   field);
2374                 g_signal_connect_after (selection, "changed",
2375                                         G_CALLBACK (ev_view_form_field_destroy),
2376                                         view);
2377         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2378                 gchar *text;
2379
2380                 /* FIXME once gtk bug 633050 is fixed */
2381                 choice = g_object_new (GTK_TYPE_COMBO_BOX, "has-entry", TRUE, "model", model, NULL);
2382
2383                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2384                 if (text) {
2385                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2386                         g_free (text);
2387                 }
2388
2389                 g_signal_connect (choice, "changed",
2390                                   G_CALLBACK (ev_view_form_field_choice_changed),
2391                                   field);
2392                 g_signal_connect_after (gtk_bin_get_child (GTK_BIN (choice)),
2393                                         "activate",
2394                                         G_CALLBACK (ev_view_form_field_destroy),
2395                                         view);
2396         } else { /* ComboBoxText */
2397                 GtkCellRenderer *renderer;
2398
2399                 choice = gtk_combo_box_new_with_model (model);
2400                 renderer = gtk_cell_renderer_text_new ();
2401                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2402                                             renderer, TRUE);
2403                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2404                                                 renderer,
2405                                                 "text", 0,
2406                                                 NULL);
2407                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2408                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2409
2410                 g_signal_connect (choice, "changed",
2411                                   G_CALLBACK (ev_view_form_field_choice_changed),
2412                                   field);
2413                 g_signal_connect_after (choice, "changed",
2414                                         G_CALLBACK (ev_view_form_field_destroy),
2415                                         view);
2416         }
2417
2418         g_object_unref (model);
2419
2420         g_object_weak_ref (G_OBJECT (choice),
2421                            (GWeakNotify)ev_view_form_field_choice_save,
2422                            view);
2423
2424         return choice;
2425 }
2426
2427 static void
2428 ev_view_handle_form_field (EvView      *view,
2429                            EvFormField *field,
2430                            gdouble      x,
2431                            gdouble      y)
2432 {
2433         GtkWidget     *field_widget = NULL;
2434         EvMappingList *form_field_mapping;
2435         EvMapping     *mapping;
2436
2437         if (field->is_read_only)
2438                 return;
2439
2440         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2441                 field_widget = ev_view_form_field_button_create_widget (view, field);
2442         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2443                 field_widget = ev_view_form_field_text_create_widget (view, field);
2444         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2445                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2446         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2447                 /* TODO */
2448         }
2449
2450         /* Form field doesn't require a widget */
2451         if (!field_widget)
2452                 return;
2453
2454         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2455                                 g_object_ref (field),
2456                                 (GDestroyNotify)g_object_unref);
2457
2458         form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2459                                                                    field->page->index);
2460         mapping = ev_mapping_list_find (form_field_mapping, field);
2461         ev_view_put_to_doc_rect (view, field_widget, field->page->index, &mapping->area);
2462         gtk_widget_show (field_widget);
2463         gtk_widget_grab_focus (field_widget);
2464 }
2465
2466 /* Annotations */
2467 static EvViewWindowChild *
2468 ev_view_get_window_child (EvView    *view,
2469                           GtkWidget *window)
2470 {
2471         GList *children = view->window_children;
2472
2473         while (children) {
2474                 EvViewWindowChild *child;
2475
2476                 child = (EvViewWindowChild *)children->data;
2477                 children = children->next;
2478
2479                 if (child->window == window)
2480                         return child;
2481         }
2482
2483         return NULL;
2484 }
2485
2486 static void
2487 ev_view_window_child_move (EvView            *view,
2488                            EvViewWindowChild *child,
2489                            gint               x,
2490                            gint               y)
2491 {
2492         GtkAllocation allocation;
2493         gint          width, height;
2494
2495         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
2496         gtk_window_get_size (GTK_WINDOW (child->window), &width, &height);
2497
2498         child->x = x;
2499         child->y = y;
2500         gtk_window_move (GTK_WINDOW (child->window),
2501                          CLAMP (x, child->parent_x,
2502                                 child->parent_x + allocation.width - width),
2503                          CLAMP (y, child->parent_y,
2504                                 child->parent_y + allocation.height - height));
2505 }
2506
2507 static void
2508 ev_view_window_child_move_with_parent (EvView    *view,
2509                                        GtkWidget *window)
2510 {
2511         EvViewWindowChild *child;
2512         gint               root_x, root_y;
2513
2514         child = ev_view_get_window_child (view, window);
2515         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2516                                &root_x, &root_y);
2517         if (root_x != child->parent_x || root_y != child->parent_y) {
2518                 gint dest_x, dest_y;
2519
2520                 dest_x = child->x + (root_x - child->parent_x);
2521                 dest_y = child->y + (root_y - child->parent_y);
2522                 child->parent_x = root_x;
2523                 child->parent_y = root_y;
2524                 ev_view_window_child_move (view, child, dest_x, dest_y);
2525         }
2526
2527         if (child->visible && !gtk_widget_get_visible (window))
2528                 gtk_widget_show (window);
2529 }
2530
2531 static void
2532 ev_view_window_child_put (EvView    *view,
2533                           GtkWidget *window,
2534                           guint      page,
2535                           gint       x,
2536                           gint       y,
2537                           gdouble    orig_x,
2538                           gdouble    orig_y)
2539 {
2540         EvViewWindowChild *child;
2541         gint               root_x, root_y;
2542
2543         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2544                                &root_x, &root_y);
2545
2546         child = g_new0 (EvViewWindowChild, 1);
2547         child->window = window;
2548         child->page = page;
2549         child->orig_x = orig_x;
2550         child->orig_y = orig_y;
2551         child->parent_x = root_x;
2552         child->parent_y = root_y;
2553         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2554         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2555
2556         if (child->visible)
2557                 gtk_widget_show (window);
2558         else
2559                 gtk_widget_hide (window);
2560
2561         view->window_children = g_list_append (view->window_children, child);
2562 }
2563
2564 static EvViewWindowChild *
2565 ev_view_find_window_child_for_annot (EvView       *view,
2566                                      guint         page,
2567                                      EvAnnotation *annot)
2568 {
2569         GList *children = view->window_children;
2570
2571         while (children) {
2572                 EvViewWindowChild *child;
2573                 EvAnnotation      *wannot;
2574
2575                 child = (EvViewWindowChild *)children->data;
2576                 children = children->next;
2577
2578                 if (child->page != page)
2579                         continue;
2580
2581                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2582                 if (ev_annotation_equal (wannot, annot))
2583                         return child;
2584         }
2585
2586         return NULL;
2587 }
2588
2589 static void
2590 ev_view_window_children_free (EvView *view)
2591 {
2592         GList *l;
2593
2594         if (!view->window_children)
2595                 return;
2596
2597         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2598                 EvViewWindowChild *child;
2599
2600                 child = (EvViewWindowChild *)l->data;
2601                 gtk_widget_destroy (GTK_WIDGET (child->window));
2602                 g_free (child);
2603         }
2604         g_list_free (view->window_children);
2605         view->window_children = NULL;
2606         view->window_child_focus = NULL;
2607 }
2608
2609 static void
2610 annotation_window_grab_focus (GtkWidget *widget,
2611                               EvView    *view)
2612 {
2613         if (view->window_child_focus)
2614                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2615         view->window_child_focus = ev_view_get_window_child (view, widget);
2616 }
2617
2618 static void
2619 annotation_window_closed (EvAnnotationWindow *window,
2620                           EvView             *view)
2621 {
2622         EvViewWindowChild *child;
2623
2624         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2625         child->visible = FALSE;
2626 }
2627
2628 static void
2629 annotation_window_moved (EvAnnotationWindow *window,
2630                          gint                x,
2631                          gint                y,
2632                          EvView             *view)
2633 {
2634         EvViewWindowChild *child;
2635         GdkRectangle       page_area;
2636         GtkBorder          border;
2637         GdkRectangle       view_rect;
2638         EvRectangle        doc_rect;
2639         gint               width, height;
2640
2641         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2642         if (child->x == x && child->y == y)
2643                 return;
2644
2645         child->moved = TRUE;
2646         child->x = x;
2647         child->y = y;
2648
2649         /* Window has been moved by the user,
2650          * we have to set a new origin in doc coords
2651          */
2652         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2653         view_rect.x = (x - child->parent_x) + view->scroll_x;
2654         view_rect.y = (y - child->parent_y) + view->scroll_y;
2655         view_rect.width = width;
2656         view_rect.height = height;
2657
2658         ev_view_get_page_extents (view, child->page, &page_area, &border);
2659         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2660         child->orig_x = doc_rect.x1;
2661         child->orig_y = doc_rect.y1;
2662 }
2663
2664 static void
2665 ev_view_annotation_save_contents (EvView       *view,
2666                                   GParamSpec   *pspec,
2667                                   EvAnnotation *annot)
2668 {
2669         if (!view->document)
2670                 return;
2671
2672         ev_document_doc_mutex_lock ();
2673         ev_document_annotations_save_annotation (EV_DOCUMENT_ANNOTATIONS (view->document),
2674                                                  annot, EV_ANNOTATIONS_SAVE_CONTENTS);
2675         ev_document_doc_mutex_unlock ();
2676 }
2677
2678 static GtkWidget *
2679 ev_view_create_annotation_window (EvView       *view,
2680                                   EvAnnotation *annot,
2681                                   GtkWindow    *parent)
2682 {
2683         GtkWidget   *window;
2684         EvRectangle  doc_rect;
2685         GdkRectangle view_rect;
2686         guint        page;
2687
2688         window = ev_annotation_window_new (annot, parent);
2689         g_signal_connect (window, "grab_focus",
2690                           G_CALLBACK (annotation_window_grab_focus),
2691                           view);
2692         g_signal_connect (window, "closed",
2693                           G_CALLBACK (annotation_window_closed),
2694                           view);
2695         g_signal_connect (window, "moved",
2696                           G_CALLBACK (annotation_window_moved),
2697                           view);
2698         g_signal_connect_swapped (annot, "notify::contents",
2699                                   G_CALLBACK (ev_view_annotation_save_contents),
2700                                   view);
2701         g_object_set_data (G_OBJECT (annot), "popup", window);
2702
2703         page = ev_annotation_get_page_index (annot);
2704         ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window), &doc_rect);
2705         doc_rect_to_view_rect (view, page, &doc_rect, &view_rect);
2706         view_rect.x -= view->scroll_x;
2707         view_rect.y -= view->scroll_y;
2708
2709         ev_view_window_child_put (view, window, page,
2710                                   view_rect.x, view_rect.y,
2711                                   doc_rect.x1, doc_rect.y1);
2712
2713         return window;
2714 }
2715
2716 static void
2717 show_annotation_windows (EvView *view,
2718                          gint    page)
2719 {
2720         EvMappingList *annots;
2721         GList         *l;
2722         GtkWindow     *parent;
2723
2724         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2725
2726         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2727
2728         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2729                 EvAnnotation      *annot;
2730                 EvViewWindowChild *child;
2731                 GtkWidget         *window;
2732
2733                 annot = ((EvMapping *)(l->data))->data;
2734
2735                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2736                         continue;
2737
2738                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2739                         continue;
2740
2741                 window = g_object_get_data (G_OBJECT (annot), "popup");
2742                 if (window) {
2743                         ev_view_window_child_move_with_parent (view, window);
2744                         continue;
2745                 }
2746
2747                 /* Look if we already have a popup for this annot */
2748                 child = ev_view_find_window_child_for_annot (view, page, annot);
2749                 window = child ? child->window : NULL;
2750                 if (window) {
2751                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2752                         g_object_set_data (G_OBJECT (annot), "popup", window);
2753                         ev_view_window_child_move_with_parent (view, window);
2754                 } else {
2755                         ev_view_create_annotation_window (view, annot, parent);
2756                 }
2757         }
2758 }
2759
2760 static void
2761 hide_annotation_windows (EvView *view,
2762                          gint    page)
2763 {
2764         EvMappingList *annots;
2765         GList         *l;
2766
2767         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2768
2769         for (l = ev_mapping_list_get_list (annots); l && l->data; l = g_list_next (l)) {
2770                 EvAnnotation *annot;
2771                 GtkWidget    *window;
2772
2773                 annot = ((EvMapping *)(l->data))->data;
2774
2775                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2776                         continue;
2777
2778                 window = g_object_get_data (G_OBJECT (annot), "popup");
2779                 if (window)
2780                         gtk_widget_hide (window);
2781         }
2782 }
2783
2784 static EvAnnotation *
2785 ev_view_get_annotation_at_location (EvView  *view,
2786                                     gdouble  x,
2787                                     gdouble  y)
2788 {
2789         gint page = -1;
2790         gint x_new = 0, y_new = 0;
2791         EvMappingList *annotations_mapping;
2792
2793         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2794                 return NULL;
2795
2796         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2797                 return NULL;
2798
2799         annotations_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
2800
2801         if (annotations_mapping)
2802                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2803         else
2804                 return NULL;
2805 }
2806
2807 static void
2808 ev_view_annotation_show_popup_window (EvView    *view,
2809                                       GtkWidget *window)
2810 {
2811         EvViewWindowChild *child;
2812
2813         if (!window)
2814                 return;
2815
2816         child = ev_view_get_window_child (view, window);
2817         if (!child->visible) {
2818                 child->visible = TRUE;
2819                 ev_view_window_child_move (view, child, child->x, child->y);
2820                 gtk_widget_show (window);
2821         }
2822 }
2823
2824 static void
2825 ev_view_handle_annotation (EvView       *view,
2826                            EvAnnotation *annot,
2827                            gdouble       x,
2828                            gdouble       y,
2829                            guint32       timestamp)
2830 {
2831         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2832                 GtkWidget *window;
2833
2834                 window = g_object_get_data (G_OBJECT (annot), "popup");
2835                 ev_view_annotation_show_popup_window (view, window);
2836         }
2837
2838         if (EV_IS_ANNOTATION_ATTACHMENT (annot)) {
2839                 EvAttachment *attachment;
2840
2841                 attachment = ev_annotation_attachment_get_attachment (EV_ANNOTATION_ATTACHMENT (annot));
2842                 if (attachment) {
2843                         GError *error = NULL;
2844
2845                         ev_attachment_open (attachment,
2846                                             gtk_widget_get_screen (GTK_WIDGET (view)),
2847                                             timestamp,
2848                                             &error);
2849
2850                         if (error) {
2851                                 g_warning ("%s", error->message);
2852                                 g_error_free (error);
2853                         }
2854                 }
2855         }
2856 }
2857
2858 static void
2859 ev_view_create_annotation (EvView          *view,
2860                            EvAnnotationType annot_type,
2861                            gint             x,
2862                            gint             y)
2863 {
2864         EvAnnotation   *annot;
2865         GdkPoint        point;
2866         GdkRectangle    page_area;
2867         GtkBorder       border;
2868         EvRectangle     doc_rect, popup_rect;
2869         EvPage         *page;
2870         GdkColor        color = { 0, 65535, 65535, 0 };
2871         GdkRectangle    view_rect;
2872         cairo_region_t *region;
2873
2874         point.x = x;
2875         point.y = y;
2876         ev_view_get_page_extents (view, view->current_page, &page_area, &border);
2877         view_point_to_doc_point (view, &point, &page_area,
2878                                  &doc_rect.x1, &doc_rect.y1);
2879         doc_rect.x2 = doc_rect.x1 + 24;
2880         doc_rect.y2 = doc_rect.y1 + 24;
2881
2882         ev_document_doc_mutex_lock ();
2883         page = ev_document_get_page (view->document, view->current_page);
2884         switch (annot_type) {
2885         case EV_ANNOTATION_TYPE_TEXT:
2886                 annot = ev_annotation_text_new (page);
2887                 break;
2888         case EV_ANNOTATION_TYPE_ATTACHMENT:
2889                 /* TODO */
2890                 g_object_unref (page);
2891                 ev_document_doc_mutex_unlock ();
2892                 return;
2893         default:
2894                 g_assert_not_reached ();
2895         }
2896         g_object_unref (page);
2897
2898         ev_annotation_set_color (annot, &color);
2899
2900         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2901                 popup_rect.x1 = doc_rect.x2;
2902                 popup_rect.x2 = popup_rect.x1 + 200;
2903                 popup_rect.y1 = doc_rect.y2;
2904                 popup_rect.y2 = popup_rect.y1 + 150;
2905                 g_object_set (annot,
2906                               "rectangle", &popup_rect,
2907                               "has_popup", TRUE,
2908                               "popup_is_open", FALSE,
2909                               "label", g_get_real_name (),
2910                               "opacity", 1.0,
2911                               NULL);
2912         }
2913         ev_document_annotations_add_annotation (EV_DOCUMENT_ANNOTATIONS (view->document),
2914                                                 annot, &doc_rect);
2915         ev_document_doc_mutex_unlock ();
2916
2917         /* If the page didn't have annots, mark the cache as dirty */
2918         if (!ev_page_cache_get_annot_mapping (view->page_cache, view->current_page))
2919                 ev_page_cache_mark_dirty (view->page_cache, view->current_page);
2920
2921         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2922                 GtkWindow *parent;
2923                 GtkWidget *window;
2924
2925                 parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2926                 window = ev_view_create_annotation_window (view, annot, parent);
2927
2928                 /* Show the annot window the first time */
2929                 ev_view_annotation_show_popup_window (view, window);
2930         }
2931
2932         doc_rect_to_view_rect (view, view->current_page, &doc_rect, &view_rect);
2933         view_rect.x -= view->scroll_x;
2934         view_rect.y -= view->scroll_y;
2935         region = cairo_region_create_rectangle (&view_rect);
2936         ev_view_reload_page (view, view->current_page, region);
2937         cairo_region_destroy (region);
2938
2939         g_signal_emit (view, signals[SIGNAL_ANNOT_ADDED], 0, annot);
2940 }
2941
2942 void
2943 ev_view_focus_annotation (EvView    *view,
2944                           EvMapping *annot_mapping)
2945 {
2946         GdkRectangle  view_rect;
2947         EvAnnotation *annot;
2948         guint         page;
2949
2950         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2951                 return;
2952
2953         if (view->focus_annotation == annot_mapping)
2954                 return;
2955
2956         view->focus_annotation = annot_mapping;
2957         annot = (EvAnnotation *)annot_mapping->data;
2958
2959         page = ev_annotation_get_page_index (annot);
2960         ev_document_model_set_page (view->model, page);
2961
2962         doc_rect_to_view_rect (view, page,
2963                                &annot_mapping->area, &view_rect);
2964         ensure_rectangle_is_visible (view, &view_rect);
2965         gtk_widget_queue_draw (GTK_WIDGET (view));
2966 }
2967
2968 void
2969 ev_view_begin_add_annotation (EvView          *view,
2970                               EvAnnotationType annot_type)
2971 {
2972         if (annot_type == EV_ANNOTATION_TYPE_UNKNOWN)
2973                 return;
2974
2975         if (view->adding_annot)
2976                 return;
2977
2978         view->adding_annot = TRUE;
2979         view->adding_annot_type = annot_type;
2980         ev_view_set_cursor (view, EV_VIEW_CURSOR_ADD);
2981 }
2982
2983 void
2984 ev_view_cancel_add_annotation (EvView *view)
2985 {
2986         gint x, y;
2987
2988         if (!view->adding_annot)
2989                 return;
2990
2991         view->adding_annot = FALSE;
2992         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
2993         ev_view_handle_cursor_over_xy (view, x, y);
2994 }
2995
2996 static gboolean
2997 ev_view_synctex_backward_search (EvView *view,
2998                                  gdouble x,
2999                                  gdouble y)
3000 {
3001         gint page = -1;
3002         gint x_new = 0, y_new = 0;
3003         EvSourceLink *link;
3004
3005         if (!ev_document_has_synctex (view->document))
3006                 return FALSE;
3007
3008         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
3009                 return FALSE;
3010
3011         link = ev_document_synctex_backward_search (view->document, page, x_new, y_new);
3012         if (link) {
3013                 g_signal_emit (view, signals[SIGNAL_SYNC_SOURCE], 0, link);
3014                 g_free (link);
3015
3016                 return TRUE;
3017         }
3018
3019         return FALSE;
3020 }
3021
3022 /*** GtkWidget implementation ***/
3023
3024 static void
3025 ev_view_size_request_continuous_dual_page (EvView         *view,
3026                                            GtkRequisition *requisition)
3027 {
3028         gint n_pages;
3029
3030         n_pages = ev_document_get_n_pages (view->document) + 1;
3031         get_page_y_offset (view, n_pages, &requisition->height);
3032
3033         switch (view->sizing_mode) {
3034                 case EV_SIZING_FIT_WIDTH:
3035                 case EV_SIZING_BEST_FIT:
3036                         requisition->width = 1;
3037
3038                         break;
3039                 case EV_SIZING_FREE: {
3040                         gint max_width;
3041                         GtkBorder border;
3042
3043                         ev_view_get_max_page_size (view, &max_width, NULL);
3044                         compute_border (view, max_width, max_width, &border);
3045                         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
3046                 }
3047                         break;
3048                 default:
3049                         g_assert_not_reached ();
3050         }
3051 }
3052
3053 static void
3054 ev_view_size_request_continuous (EvView         *view,
3055                                  GtkRequisition *requisition)
3056 {
3057         gint n_pages;
3058
3059         n_pages = ev_document_get_n_pages (view->document);
3060         get_page_y_offset (view, n_pages, &requisition->height);
3061
3062         switch (view->sizing_mode) {
3063                 case EV_SIZING_FIT_WIDTH:
3064                 case EV_SIZING_BEST_FIT:
3065                         requisition->width = 1;
3066
3067                         break;
3068                 case EV_SIZING_FREE: {
3069                         gint max_width;
3070                         GtkBorder border;
3071
3072                         ev_view_get_max_page_size (view, &max_width, NULL);
3073                         compute_border (view, max_width, max_width, &border);
3074                         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
3075                 }
3076                         break;
3077                 default:
3078                         g_assert_not_reached ();
3079         }
3080 }
3081
3082 static void
3083 ev_view_size_request_dual_page (EvView         *view,
3084                                 GtkRequisition *requisition)
3085 {
3086         GtkBorder border;
3087         gint width, height;
3088
3089         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
3090                 requisition->width = 1;
3091                 requisition->height = 1;
3092
3093                 return;
3094         }
3095
3096         /* Find the largest of the two. */
3097         ev_view_get_page_size (view,
3098                                view->current_page,
3099                                &width, &height);
3100         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
3101                 gint width_2, height_2;
3102                 ev_view_get_page_size (view,
3103                                        view->current_page + 1,
3104                                        &width_2, &height_2);
3105                 if (width_2 > width) {
3106                         width = width_2;
3107                         height = height_2;
3108                 }
3109         }
3110         compute_border (view, width, height, &border);
3111
3112         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
3113                 ((width + border.left + border.right) * 2) + (view->spacing * 3);
3114         requisition->height = (height + border.top + border.bottom) + (view->spacing * 2);
3115 }
3116
3117 static void
3118 ev_view_size_request_single_page (EvView         *view,
3119                                   GtkRequisition *requisition)
3120 {
3121         GtkBorder border;
3122         gint width, height;
3123
3124         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
3125                 requisition->width = 1;
3126                 requisition->height = 1;
3127
3128                 return;
3129         }
3130
3131         ev_view_get_page_size (view, view->current_page, &width, &height);
3132         compute_border (view, width, height, &border);
3133
3134         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
3135                 width + border.left + border.right + (2 * view->spacing);
3136         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
3137 }
3138
3139 static void
3140 ev_view_size_request (GtkWidget      *widget,
3141                       GtkRequisition *requisition)
3142 {
3143         EvView *view = EV_VIEW (widget);
3144
3145         if (view->document == NULL) {
3146                 view->requisition.width = 1;
3147                 view->requisition.height = 1;
3148
3149                 *requisition = view->requisition;
3150
3151                 return;
3152         }
3153
3154         /* Get zoom for size here when not called from
3155          * ev_view_size_allocate()
3156          */
3157         if (!view->internal_size_request &&
3158             (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3159              view->sizing_mode == EV_SIZING_BEST_FIT)) {
3160                 GtkAllocation allocation;
3161
3162                 gtk_widget_get_allocation (widget, &allocation);
3163                 ev_view_zoom_for_size (view,
3164                                        allocation.width,
3165                                        allocation.height);
3166         }
3167
3168         if (view->continuous && view->dual_page)
3169                 ev_view_size_request_continuous_dual_page (view, &view->requisition);
3170         else if (view->continuous)
3171                 ev_view_size_request_continuous (view, &view->requisition);
3172         else if (view->dual_page)
3173                 ev_view_size_request_dual_page (view, &view->requisition);
3174         else
3175                 ev_view_size_request_single_page (view, &view->requisition);
3176
3177         *requisition = view->requisition;
3178 }
3179
3180 static void
3181 ev_view_get_preferred_width (GtkWidget *widget,
3182                              gint      *minimum,
3183                              gint      *natural)
3184 {
3185         GtkRequisition requisition;
3186
3187         ev_view_size_request (widget, &requisition);
3188
3189         *minimum = *natural = requisition.width;
3190 }
3191
3192 static void
3193 ev_view_get_preferred_height (GtkWidget *widget,
3194                               gint      *minimum,
3195                               gint      *natural)
3196 {
3197         GtkRequisition requisition;
3198
3199         ev_view_size_request (widget, &requisition);
3200
3201         *minimum = *natural = requisition.height;
3202 }
3203
3204 static void
3205 ev_view_size_allocate (GtkWidget      *widget,
3206                        GtkAllocation  *allocation)
3207 {
3208         EvView *view = EV_VIEW (widget);
3209         GList  *l;
3210         gint    root_x, root_y;
3211
3212         gtk_widget_set_allocation (widget, allocation);
3213
3214         if (gtk_widget_get_realized (widget))
3215                 gdk_window_move_resize (gtk_widget_get_window (widget),
3216                                         allocation->x,
3217                                         allocation->y,
3218                                         allocation->width,
3219                                         allocation->height);
3220
3221         if (!view->document)
3222                 return;
3223
3224         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3225             view->sizing_mode == EV_SIZING_BEST_FIT) {
3226                 GtkRequisition req;
3227
3228                 ev_view_zoom_for_size (view,
3229                                        allocation->width,
3230                                        allocation->height);
3231                 view->internal_size_request = TRUE;
3232                 ev_view_size_request (widget, &req);
3233                 view->internal_size_request = FALSE;
3234         }
3235
3236         ev_view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
3237         ev_view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
3238
3239         if (view->document)
3240                 view_update_range_and_current_page (view);
3241
3242         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
3243         view->pending_resize = FALSE;
3244         view->pending_point.x = 0;
3245         view->pending_point.y = 0;
3246
3247         for (l = view->children; l && l->data; l = g_list_next (l)) {
3248                 GdkRectangle view_area;
3249                 EvViewChild *child = (EvViewChild *)l->data;
3250
3251                 if (!gtk_widget_get_visible (child->widget))
3252                         continue;
3253
3254                 doc_rect_to_view_rect (view, child->page, &child->doc_rect, &view_area);
3255                 view_area.x -= view->scroll_x;
3256                 view_area.y -= view->scroll_y;
3257
3258                 gtk_widget_set_size_request (child->widget, view_area.width, view_area.height);
3259                 gtk_widget_size_allocate (child->widget, &view_area);
3260         }
3261
3262         if (view->window_children)
3263                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
3264                                        &root_x, &root_y);
3265
3266         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
3267                 EvViewWindowChild *child;
3268                 EvRectangle        doc_rect;
3269                 GdkRectangle       view_rect;
3270
3271                 child = (EvViewWindowChild *)l->data;
3272
3273                 ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window), &doc_rect);
3274                 if (child->moved) {
3275                         doc_rect.x1 = child->orig_x;
3276                         doc_rect.y1 = child->orig_y;
3277                 }
3278                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
3279                 view_rect.x -= view->scroll_x;
3280                 view_rect.y -= view->scroll_y;
3281
3282                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
3283                         child->parent_x = root_x;
3284                         child->parent_y = root_y;
3285                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
3286                 }
3287         }
3288 }
3289
3290 static gboolean
3291 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
3292 {
3293         EvView *view = EV_VIEW (widget);
3294         guint state;
3295
3296         state = event->state & gtk_accelerator_get_default_mod_mask ();
3297
3298         if (state == GDK_CONTROL_MASK) {
3299                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
3300                 if (event->direction == GDK_SCROLL_UP ||
3301                     event->direction == GDK_SCROLL_LEFT) {
3302                         if (ev_view_can_zoom_in (view)) {
3303                                 ev_view_zoom_in (view);
3304                         }
3305                 } else {
3306                         if (ev_view_can_zoom_out (view)) {
3307                                 ev_view_zoom_out (view);
3308                         }
3309                 }
3310
3311                 return TRUE;
3312         }
3313
3314         view->jump_to_find_result = FALSE;
3315
3316         /* Shift+Wheel scrolls the in the perpendicular direction */
3317         if (state & GDK_SHIFT_MASK) {
3318                 if (event->direction == GDK_SCROLL_UP)
3319                         event->direction = GDK_SCROLL_LEFT;
3320                 else if (event->direction == GDK_SCROLL_LEFT)
3321                         event->direction = GDK_SCROLL_UP;
3322                 else if (event->direction == GDK_SCROLL_DOWN)
3323                         event->direction = GDK_SCROLL_RIGHT;
3324                 else if (event->direction == GDK_SCROLL_RIGHT)
3325                         event->direction = GDK_SCROLL_DOWN;
3326
3327                 event->state &= ~GDK_SHIFT_MASK;
3328                 state &= ~GDK_SHIFT_MASK;
3329         }
3330
3331         if (state == 0 && view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous) {
3332                 switch (event->direction) {
3333                         case GDK_SCROLL_DOWN:
3334                         case GDK_SCROLL_RIGHT:
3335                                 ev_view_next_page (view);
3336                                 break;
3337                         case GDK_SCROLL_UP:
3338                         case GDK_SCROLL_LEFT:
3339                                 ev_view_previous_page (view);
3340                                 break;
3341                 }
3342
3343                 return TRUE;
3344         }
3345
3346         return FALSE;
3347 }
3348
3349 static EvViewSelection *
3350 find_selection_for_page (EvView *view,
3351                          gint    page)
3352 {
3353         GList *list;
3354
3355         for (list = view->selection_info.selections; list != NULL; list = list->next) {
3356                 EvViewSelection *selection;
3357
3358                 selection = (EvViewSelection *) list->data;
3359
3360                 if (selection->page == page)
3361                         return selection;
3362         }
3363
3364         return NULL;
3365 }
3366
3367 static void
3368 ev_view_realize (GtkWidget *widget)
3369 {
3370         GtkAllocation allocation;
3371         GdkWindow *window;
3372         GdkWindowAttr attributes;
3373         gint attributes_mask;
3374
3375         gtk_widget_set_realized (widget, TRUE);
3376
3377         gtk_widget_get_allocation (widget, &allocation);
3378
3379         attributes.window_type = GDK_WINDOW_CHILD;
3380         attributes.x = allocation.x;
3381         attributes.y = allocation.y;
3382         attributes.width = allocation.width;
3383         attributes.height = allocation.height;
3384         attributes.wclass = GDK_INPUT_OUTPUT;
3385         attributes.visual = gtk_widget_get_visual (widget);
3386         attributes.event_mask = gtk_widget_get_events (widget);
3387
3388         attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
3389
3390         window = gdk_window_new (gtk_widget_get_parent_window (widget),
3391                                  &attributes, attributes_mask);
3392         gtk_widget_set_window (widget, window);
3393         gdk_window_set_user_data (window, widget);
3394
3395         gtk_style_context_set_background (gtk_widget_get_style_context (widget),
3396                                           window);
3397 }
3398
3399 static gboolean
3400 ev_view_draw (GtkWidget *widget,
3401               cairo_t   *cr)
3402 {
3403         EvView      *view = EV_VIEW (widget);
3404         gint         i;
3405         GdkRectangle clip_rect;
3406
3407         if (view->loading) {
3408                 show_loading_window (view);
3409         } else if (view->loading_window &&
3410                    gtk_widget_get_visible (view->loading_window)) {
3411                 ev_view_loading_window_move (view);
3412         }
3413
3414         if (view->document == NULL)
3415                 return FALSE;
3416
3417         if (!gdk_cairo_get_clip_rectangle (cr, &clip_rect))
3418                 return FALSE;
3419
3420         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3421                 GdkRectangle page_area;
3422                 GtkBorder border;
3423                 gboolean page_ready = TRUE;
3424
3425                 if (!ev_view_get_page_extents (view, i, &page_area, &border))
3426                         continue;
3427
3428                 page_area.x -= view->scroll_x;
3429                 page_area.y -= view->scroll_y;
3430
3431                 draw_one_page (view, i, cr, &page_area, &border, &clip_rect, &page_ready);
3432
3433                 if (page_ready && view->find_pages && view->highlight_find_results)
3434                         highlight_find_results (view, cr, i);
3435                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3436                         show_annotation_windows (view, i);
3437                 if (page_ready && view->focus_annotation)
3438                         focus_annotation (view, cr, i, &clip_rect);
3439                 if (page_ready && view->synctex_result)
3440                         highlight_forward_search_results (view, cr, i);
3441         }
3442
3443         if (GTK_WIDGET_CLASS (ev_view_parent_class)->draw)
3444                 GTK_WIDGET_CLASS (ev_view_parent_class)->draw (widget, cr);
3445
3446         return FALSE;
3447 }
3448
3449 static gboolean
3450 ev_view_do_popup_menu (EvView *view,
3451                        gdouble x,
3452                        gdouble y)
3453 {
3454         GList        *items = NULL;
3455         EvLink       *link;
3456         EvImage      *image;
3457         EvAnnotation *annot;
3458
3459         image = ev_view_get_image_at_location (view, x, y);
3460         if (image)
3461                 items = g_list_prepend (items, image);
3462
3463         link = ev_view_get_link_at_location (view, x, y);
3464         if (link)
3465                 items = g_list_prepend (items, link);
3466
3467         annot = ev_view_get_annotation_at_location (view, x, y);
3468         if (annot)
3469                 items = g_list_prepend (items, annot);
3470
3471         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, items);
3472
3473         g_list_free (items);
3474
3475         return TRUE;
3476 }
3477
3478 static gboolean
3479 ev_view_popup_menu (GtkWidget *widget)
3480 {
3481         gint x, y;
3482
3483         gtk_widget_get_pointer (widget, &x, &y);
3484         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3485 }
3486
3487 static void
3488 get_link_area (EvView       *view,
3489                gint          x,
3490                gint          y,
3491                EvLink       *link,
3492                GdkRectangle *area)
3493 {
3494         EvMappingList *link_mapping;
3495         gint           page;
3496         gint           x_offset = 0, y_offset = 0;
3497
3498         x += view->scroll_x;
3499         y += view->scroll_y;
3500
3501         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3502
3503         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
3504         ev_view_get_area_from_mapping (view, page,
3505                                        link_mapping,
3506                                        link, area);
3507 }
3508
3509 static void
3510 get_annot_area (EvView       *view,
3511                gint          x,
3512                gint          y,
3513                EvAnnotation *annot,
3514                GdkRectangle *area)
3515 {
3516         EvMappingList *annot_mapping;
3517         gint           page;
3518         gint           x_offset = 0, y_offset = 0;
3519
3520         x += view->scroll_x;
3521         y += view->scroll_y;
3522
3523         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3524
3525         annot_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
3526         ev_view_get_area_from_mapping (view, page,
3527                                        annot_mapping,
3528                                        annot, area);
3529 }
3530
3531 static gboolean
3532 ev_view_query_tooltip (GtkWidget  *widget,
3533                        gint        x,
3534                        gint        y,
3535                        gboolean    keyboard_tip,
3536                        GtkTooltip *tooltip)
3537 {
3538         EvView       *view = EV_VIEW (widget);
3539         EvLink       *link;
3540         EvAnnotation *annot;
3541         gchar        *text;
3542
3543         annot = ev_view_get_annotation_at_location (view, x, y);
3544         if (annot) {
3545                 const gchar *contents;
3546
3547                 if ((contents = ev_annotation_get_contents (annot))) {
3548                         GdkRectangle annot_area;
3549
3550                         get_annot_area (view, x, y, annot, &annot_area);
3551                         gtk_tooltip_set_text (tooltip, contents);
3552                         gtk_tooltip_set_tip_area (tooltip, &annot_area);
3553
3554                         return TRUE;
3555                 }
3556         }
3557
3558         link = ev_view_get_link_at_location (view, x, y);
3559         if (!link)
3560                 return FALSE;
3561
3562         text = tip_from_link (view, link);
3563         if (text && g_utf8_validate (text, -1, NULL)) {
3564                 GdkRectangle link_area;
3565
3566                 get_link_area (view, x, y, link, &link_area);
3567                 gtk_tooltip_set_text (tooltip, text);
3568                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3569                 g_free (text);
3570
3571                 return TRUE;
3572         }
3573         g_free (text);
3574
3575         return FALSE;
3576 }
3577
3578 static void
3579 start_selection_for_event (EvView         *view,
3580                            GdkEventButton *event)
3581 {
3582         clear_selection (view);
3583
3584         view->selection_info.start.x = event->x + view->scroll_x;
3585         view->selection_info.start.y = event->y + view->scroll_y;
3586
3587         switch (event->type) {
3588                 case GDK_2BUTTON_PRESS:
3589                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3590                         break;
3591                 case GDK_3BUTTON_PRESS:
3592                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3593                         break;
3594                 default:
3595                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3596                         return;
3597         }
3598
3599         /* In case of WORD or LINE, compute selections now */
3600         compute_selections (view,
3601                             view->selection_info.style,
3602                             &(view->selection_info.start),
3603                             &(view->selection_info.start));
3604 }
3605
3606 static gboolean
3607 ev_view_button_press_event (GtkWidget      *widget,
3608                             GdkEventButton *event)
3609 {
3610         EvView *view = EV_VIEW (widget);
3611
3612         if (!view->document)
3613                 return FALSE;
3614
3615         if (!gtk_widget_has_focus (widget)) {
3616                 gtk_widget_grab_focus (widget);
3617         }
3618
3619         if (view->window_child_focus) {
3620                 EvAnnotationWindow *window;
3621                 EvAnnotation       *annot;
3622
3623                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3624                 annot = ev_annotation_window_get_annotation (window);
3625                 ev_annotation_window_ungrab_focus (window);
3626                 view->window_child_focus = NULL;
3627         }
3628
3629         view->pressed_button = event->button;
3630         view->selection_info.in_drag = FALSE;
3631
3632         if (view->adding_annot)
3633                 return FALSE;
3634
3635         if (view->scroll_info.autoscrolling)
3636                 return TRUE;
3637
3638         switch (event->button) {
3639                 case 1: {
3640                         EvImage *image;
3641                         EvAnnotation *annot;
3642                         EvFormField *field;
3643
3644                         if (event->state & GDK_CONTROL_MASK)
3645                                 return ev_view_synctex_backward_search (view, event->x , event->y);
3646
3647                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3648                                 if (event->type == GDK_3BUTTON_PRESS) {
3649                                         start_selection_for_event (view, event);
3650                                 } else if (location_in_selected_text (view,
3651                                                                event->x + view->scroll_x,
3652                                                                event->y + view->scroll_y)) {
3653                                         view->selection_info.in_drag = TRUE;
3654                                 } else {
3655                                         start_selection_for_event (view, event);
3656                                 }
3657
3658                                 gtk_widget_queue_draw (widget);
3659                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3660                                 ev_view_handle_annotation (view, annot, event->x, event->y, event->time);
3661                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3662                                 ev_view_remove_all (view);
3663                                 ev_view_handle_form_field (view, field, event->x, event->y);
3664                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3665                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3666                                 if (view->image_dnd_info.image)
3667                                         g_object_unref (view->image_dnd_info.image);
3668                                 view->image_dnd_info.image = g_object_ref (image);
3669                                 view->image_dnd_info.in_drag = TRUE;
3670
3671                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3672                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3673                         } else {
3674                                 ev_view_remove_all (view);
3675
3676                                 if (view->synctex_result) {
3677                                         g_free (view->synctex_result);
3678                                         view->synctex_result = NULL;
3679                                         gtk_widget_queue_draw (widget);
3680                                 }
3681
3682                                 if (view->focus_annotation)
3683                                         view->focus_annotation = NULL;
3684
3685                                 if (EV_IS_SELECTION (view->document))
3686                                         start_selection_for_event (view, event);
3687                         }
3688                 }
3689                         return TRUE;
3690                 case 2:
3691                         /* use root coordinates as reference point because
3692                          * scrolling changes window relative coordinates */
3693                         view->drag_info.start.x = event->x_root;
3694                         view->drag_info.start.y = event->y_root;
3695                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3696                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3697
3698                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3699
3700                         return TRUE;
3701                 case 3:
3702                         view->scroll_info.start_y = event->y;
3703                         return ev_view_do_popup_menu (view, event->x, event->y);
3704         }
3705
3706         return FALSE;
3707 }
3708
3709 static void
3710 ev_view_remove_all (EvView *view)
3711 {
3712         gtk_container_foreach (GTK_CONTAINER (view), (GtkCallback) gtk_widget_destroy, NULL);
3713 }
3714
3715 /*** Drag and Drop ***/
3716 static void
3717 ev_view_drag_data_get (GtkWidget        *widget,
3718                        GdkDragContext   *context,
3719                        GtkSelectionData *selection_data,
3720                        guint             info,
3721                        guint             time)
3722 {
3723         EvView *view = EV_VIEW (widget);
3724
3725         switch (info) {
3726                 case TARGET_DND_TEXT:
3727                         if (EV_IS_SELECTION (view->document) &&
3728                             view->selection_info.selections) {
3729                                 gchar *text;
3730
3731                                 text = get_selected_text (view);
3732                                 gtk_selection_data_set_text (selection_data,
3733                                                              text,
3734                                                              strlen (text));
3735                                 g_free (text);
3736                         }
3737                         break;
3738                 case TARGET_DND_IMAGE:
3739                         if (view->image_dnd_info.image) {
3740                                 GdkPixbuf *pixbuf;
3741
3742                                 ev_document_doc_mutex_lock ();
3743                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3744                                                                        view->image_dnd_info.image);
3745                                 ev_document_doc_mutex_unlock ();
3746
3747                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3748                                 g_object_unref (pixbuf);
3749                         }
3750                         break;
3751                 case TARGET_DND_URI:
3752                         if (view->image_dnd_info.image) {
3753                                 GdkPixbuf   *pixbuf;
3754                                 const gchar *tmp_uri;
3755                                 gchar       *uris[2];
3756
3757                                 ev_document_doc_mutex_lock ();
3758                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3759                                                                        view->image_dnd_info.image);
3760                                 ev_document_doc_mutex_unlock ();
3761
3762                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3763                                 g_object_unref (pixbuf);
3764
3765                                 uris[0] = (gchar *)tmp_uri;
3766                                 uris[1] = NULL;
3767                                 gtk_selection_data_set_uris (selection_data, uris);
3768                         }
3769         }
3770 }
3771
3772 static gboolean
3773 ev_view_drag_motion (GtkWidget      *widget,
3774                      GdkDragContext *context,
3775                      gint            x,
3776                      gint            y,
3777                      guint           time)
3778 {
3779         if (gtk_drag_get_source_widget (context) == widget)
3780                 gdk_drag_status (context, 0, time);
3781         else
3782                 gdk_drag_status (context, gdk_drag_context_get_suggested_action (context), time);
3783
3784         return TRUE;
3785 }
3786
3787 static gboolean
3788 selection_update_idle_cb (EvView *view)
3789 {
3790         compute_selections (view,
3791                             view->selection_info.style,
3792                             &view->selection_info.start,
3793                             &view->motion);
3794         view->selection_update_id = 0;
3795         return FALSE;
3796 }
3797
3798 static gboolean
3799 selection_scroll_timeout_cb (EvView *view)
3800 {
3801         gint x, y, shift = 0;
3802         GtkWidget *widget = GTK_WIDGET (view);
3803         GtkAllocation allocation;
3804
3805         gtk_widget_get_allocation (widget, &allocation);
3806         gtk_widget_get_pointer (widget, &x, &y);
3807
3808         if (y > allocation.height) {
3809                 shift = (y - allocation.height) / 2;
3810         } else if (y < 0) {
3811                 shift = y / 2;
3812         }
3813
3814         if (shift)
3815                 gtk_adjustment_set_value (view->vadjustment,
3816                                           CLAMP (gtk_adjustment_get_value (view->vadjustment) + shift,
3817                                                  gtk_adjustment_get_lower (view->vadjustment),
3818                                                  gtk_adjustment_get_upper (view->vadjustment) -
3819                                                  gtk_adjustment_get_page_size (view->vadjustment)));
3820
3821         if (x > allocation.width) {
3822                 shift = (x - allocation.width) / 2;
3823         } else if (x < 0) {
3824                 shift = x / 2;
3825         }
3826
3827         if (shift)
3828                 gtk_adjustment_set_value (view->hadjustment,
3829                                           CLAMP (gtk_adjustment_get_value (view->hadjustment) + shift,
3830                                                  gtk_adjustment_get_lower (view->hadjustment),
3831                                                  gtk_adjustment_get_upper (view->hadjustment) -
3832                                                  gtk_adjustment_get_page_size (view->hadjustment)));
3833
3834         return TRUE;
3835 }
3836
3837 static gboolean
3838 ev_view_drag_update_momentum (EvView *view)
3839 {
3840         int i;
3841         if (!view->drag_info.in_drag)
3842                 return FALSE;
3843
3844         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3845                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3846                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3847         }
3848
3849         /* Momentum is a moving average of 10ms granularity over
3850          * the last 100ms with each 10ms stored in buffer.
3851          */
3852
3853         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3854         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3855
3856         return TRUE;
3857 }
3858
3859 static gboolean
3860 ev_view_scroll_drag_release (EvView *view)
3861 {
3862         gdouble dhadj_value, dvadj_value;
3863         gdouble oldhadjustment, oldvadjustment;
3864         gdouble h_page_size, v_page_size;
3865         gdouble h_upper, v_upper;
3866         GtkAllocation allocation;
3867
3868         view->drag_info.momentum.x /= 1.2;
3869         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3870
3871         gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
3872
3873         h_page_size = gtk_adjustment_get_page_size (view->hadjustment);
3874         v_page_size = gtk_adjustment_get_page_size (view->vadjustment);
3875
3876         dhadj_value = h_page_size *
3877                       (gdouble)view->drag_info.momentum.x / allocation.width;
3878         dvadj_value = v_page_size *
3879                       (gdouble)view->drag_info.momentum.y / allocation.height;
3880
3881         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3882         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3883
3884         h_upper = gtk_adjustment_get_upper (view->hadjustment);
3885         v_upper = gtk_adjustment_get_upper (view->vadjustment);
3886
3887         /* When we reach the edges, we need either to absorb some momentum and bounce by
3888          * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3889         if (((oldhadjustment + dhadj_value) > (h_upper - h_page_size)) ||
3890             ((oldhadjustment + dhadj_value) < 0))
3891                 view->drag_info.momentum.x = 0;
3892         if (((oldvadjustment + dvadj_value) > (v_upper - v_page_size)) ||
3893             ((oldvadjustment + dvadj_value) < 0))
3894                 view->drag_info.momentum.y = 0;
3895
3896         gtk_adjustment_set_value (view->hadjustment,
3897                                   MIN (oldhadjustment + dhadj_value,
3898                                        h_upper - h_page_size));
3899         gtk_adjustment_set_value (view->vadjustment,
3900                                   MIN (oldvadjustment + dvadj_value,
3901                                        v_upper - v_page_size));
3902
3903         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3904             ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3905                 return FALSE;
3906         else
3907                 return TRUE;
3908 }
3909
3910 static gboolean
3911 ev_view_motion_notify_event (GtkWidget      *widget,
3912                              GdkEventMotion *event)
3913 {
3914         EvView    *view = EV_VIEW (widget);
3915         GdkWindow *window;
3916         gint       x, y;
3917
3918         if (!view->document)
3919                 return FALSE;
3920
3921         window = gtk_widget_get_window (widget);
3922
3923         if (event->is_hint || event->window != window) {
3924             gtk_widget_get_pointer (widget, &x, &y);
3925         } else {
3926             x = event->x;
3927             y = event->y;
3928         }
3929
3930         if (view->scroll_info.autoscrolling) {
3931                 view->scroll_info.last_y = y;
3932                 return TRUE;
3933         }
3934
3935         if (view->selection_info.in_drag) {
3936                 if (gtk_drag_check_threshold (widget,
3937                                               view->selection_info.start.x,
3938                                               view->selection_info.start.y,
3939                                               x, y)) {
3940                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3941
3942                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3943
3944                         gtk_drag_begin (widget, target_list,
3945                                         GDK_ACTION_COPY,
3946                                         1, (GdkEvent *)event);
3947
3948                         view->selection_info.in_drag = FALSE;
3949
3950                         gtk_target_list_unref (target_list);
3951
3952                         return TRUE;
3953                 }
3954         } else if (view->image_dnd_info.in_drag) {
3955                 if (gtk_drag_check_threshold (widget,
3956                                               view->selection_info.start.x,
3957                                               view->selection_info.start.y,
3958                                               x, y)) {
3959                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3960
3961                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3962                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3963
3964                         gtk_drag_begin (widget, target_list,
3965                                         GDK_ACTION_COPY,
3966                                         1, (GdkEvent *)event);
3967
3968                         view->image_dnd_info.in_drag = FALSE;
3969
3970                         gtk_target_list_unref (target_list);
3971
3972                         return TRUE;
3973                 }
3974         }
3975
3976         switch (view->pressed_button) {
3977         case 1:
3978                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3979                  * documents only.
3980                  */
3981                 if (view->rotation != 0)
3982                         return FALSE;
3983
3984                 /* Schedule timeout to scroll during selection and additionally
3985                  * scroll once to allow arbitrary speed. */
3986                 if (!view->selection_scroll_id)
3987                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3988                                                                (GSourceFunc)selection_scroll_timeout_cb,
3989                                                                view);
3990                 else
3991                     selection_scroll_timeout_cb (view);
3992
3993                 view->selection_info.in_selection = TRUE;
3994                 view->motion.x = x + view->scroll_x;
3995                 view->motion.y = y + view->scroll_y;
3996
3997                 /* Queue an idle to handle the motion.  We do this because
3998                  * handling any selection events in the motion could be slower
3999                  * than new motion events reach us.  We always put it in the
4000                  * idle to make sure we catch up and don't visibly lag the
4001                  * mouse. */
4002                 if (!view->selection_update_id)
4003                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
4004
4005                 return TRUE;
4006         case 2:
4007                 if (!view->drag_info.in_drag) {
4008                         gboolean start;
4009                         int i;
4010
4011                         start = gtk_drag_check_threshold (widget,
4012                                                           view->drag_info.start.x,
4013                                                           view->drag_info.start.y,
4014                                                           event->x_root,
4015                                                           event->y_root);
4016                         view->drag_info.in_drag = start;
4017                         view->drag_info.drag_timeout_id = g_timeout_add (10,
4018                                 (GSourceFunc)ev_view_drag_update_momentum, view);
4019                         /* Set 100 to choose how long it takes to build up momentum */
4020                         /* Clear out previous momentum info: */
4021                         for (i = 0; i < DRAG_HISTORY; i++) {
4022                                 view->drag_info.buffer[i].x = event->x;
4023                                 view->drag_info.buffer[i].y = event->y;
4024                         }
4025                         view->drag_info.momentum.x = 0;
4026                         view->drag_info.momentum.y = 0;
4027                 }
4028
4029                 if (view->drag_info.in_drag) {
4030                         int dx, dy;
4031                         gdouble dhadj_value, dvadj_value;
4032                         GtkAllocation allocation;
4033
4034                         view->drag_info.buffer[0].x = event->x;
4035                         view->drag_info.buffer[0].y = event->y;
4036
4037                         dx = event->x_root - view->drag_info.start.x;
4038                         dy = event->y_root - view->drag_info.start.y;
4039
4040                         gtk_widget_get_allocation (widget, &allocation);
4041
4042                         dhadj_value = gtk_adjustment_get_page_size (view->hadjustment) *
4043                                       (gdouble)dx / allocation.width;
4044                         dvadj_value = gtk_adjustment_get_page_size (view->vadjustment) *
4045                                       (gdouble)dy / allocation.height;
4046
4047                         /* clamp scrolling to visible area */
4048                         gtk_adjustment_set_value (view->hadjustment,
4049                                                   MIN (view->drag_info.hadj - dhadj_value,
4050                                                        gtk_adjustment_get_upper (view->hadjustment) -
4051                                                        gtk_adjustment_get_page_size (view->hadjustment)));
4052                         gtk_adjustment_set_value (view->vadjustment,
4053                                                   MIN (view->drag_info.vadj - dvadj_value,
4054                                                        gtk_adjustment_get_upper (view->vadjustment) -
4055                                                        gtk_adjustment_get_page_size (view->vadjustment)));
4056
4057                         return TRUE;
4058                 }
4059
4060                 break;
4061         default:
4062                 ev_view_handle_cursor_over_xy (view, x, y);
4063         }
4064
4065         return FALSE;
4066 }
4067
4068 static gboolean
4069 ev_view_button_release_event (GtkWidget      *widget,
4070                               GdkEventButton *event)
4071 {
4072         EvView *view = EV_VIEW (widget);
4073         EvLink *link = NULL;
4074
4075         view->image_dnd_info.in_drag = FALSE;
4076
4077         if (view->scroll_info.autoscrolling) {
4078                 ev_view_autoscroll_stop (view);
4079                 view->pressed_button = -1;
4080
4081                 return TRUE;
4082         }
4083
4084         if (view->pressed_button == 1 && event->state & GDK_CONTROL_MASK) {
4085                 view->pressed_button = -1;
4086                 return TRUE;
4087         }
4088
4089         if (view->drag_info.in_drag) {
4090                 view->drag_info.release_timeout_id =
4091                         g_timeout_add (20,
4092                                        (GSourceFunc)ev_view_scroll_drag_release, view);
4093         }
4094
4095         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
4096                 link = ev_view_get_link_at_location (view, event->x, event->y);
4097         }
4098
4099         view->drag_info.in_drag = FALSE;
4100
4101         if (view->adding_annot && view->pressed_button == 1) {
4102                 view->adding_annot = FALSE;
4103                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
4104                 view->pressed_button = -1;
4105
4106                 ev_view_create_annotation (view,
4107                                            view->adding_annot_type,
4108                                            event->x + view->scroll_x,
4109                                            event->y + view->scroll_y);
4110
4111                 return FALSE;
4112         }
4113
4114         if (view->pressed_button == 2) {
4115                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
4116         }
4117
4118         view->pressed_button = -1;
4119
4120         if (view->selection_scroll_id) {
4121             g_source_remove (view->selection_scroll_id);
4122             view->selection_scroll_id = 0;
4123         }
4124         if (view->selection_update_id) {
4125             g_source_remove (view->selection_update_id);
4126             view->selection_update_id = 0;
4127         }
4128
4129         if (view->selection_info.selections) {
4130                 clear_link_selected (view);
4131                 ev_view_update_primary_selection (view);
4132
4133                 if (view->selection_info.in_drag) {
4134                         clear_selection (view);
4135                         gtk_widget_queue_draw (widget);
4136                 }
4137
4138                 view->selection_info.in_drag = FALSE;
4139         } else if (link) {
4140                 if (event->button == 2) {
4141                         EvLinkAction    *action;
4142                         EvLinkActionType type;
4143
4144                         action = ev_link_get_action (link);
4145                         if (!action)
4146                                 return FALSE;
4147
4148                         type = ev_link_action_get_action_type (action);
4149                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
4150                                 g_signal_emit (view,
4151                                                signals[SIGNAL_EXTERNAL_LINK],
4152                                                0, action);
4153                         }
4154                 } else {
4155                         ev_view_handle_link (view, link);
4156                 }
4157         }
4158
4159         return FALSE;
4160 }
4161
4162 static gboolean
4163 ev_view_key_press_event (GtkWidget   *widget,
4164                          GdkEventKey *event)
4165 {
4166         EvView *view = EV_VIEW (widget);
4167
4168         if (!view->document)
4169                 return FALSE;
4170
4171         if (!gtk_widget_has_focus (widget)) {
4172                 /* Forward key events to current focused window child */
4173                 if (view->window_child_focus) {
4174                         GdkEventKey *new_event;
4175                         gboolean     handled;
4176
4177                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
4178                         g_object_unref (new_event->window);
4179                         new_event->window = gtk_widget_get_window (view->window_child_focus->window);
4180                         if (new_event->window)
4181                                 g_object_ref (new_event->window);
4182                         gtk_widget_realize (view->window_child_focus->window);
4183                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
4184                         gdk_event_free ((GdkEvent *)new_event);
4185
4186                         return handled;
4187                 }
4188
4189                 return FALSE;
4190         }
4191
4192         return gtk_bindings_activate_event (G_OBJECT (widget), event);
4193 }
4194
4195 static gint
4196 ev_view_focus_in (GtkWidget     *widget,
4197                   GdkEventFocus *event)
4198 {
4199         if (EV_VIEW (widget)->pixbuf_cache)
4200                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4201         gtk_widget_queue_draw (widget);
4202
4203         return FALSE;
4204 }
4205
4206 static gint
4207 ev_view_focus_out (GtkWidget     *widget,
4208                    GdkEventFocus *event)
4209 {
4210         if (EV_VIEW (widget)->pixbuf_cache)
4211                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4212         gtk_widget_queue_draw (widget);
4213
4214         return FALSE;
4215 }
4216
4217 static gboolean
4218 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4219 {
4220         EvView *view = EV_VIEW (widget);
4221
4222         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4223                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4224
4225         return FALSE;
4226 }
4227
4228 static gboolean
4229 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4230 {
4231         EvView *view = EV_VIEW (widget);
4232
4233         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4234
4235         return FALSE;
4236 }
4237
4238 static void
4239 ev_view_style_updated (GtkWidget *widget)
4240 {
4241         if (EV_VIEW (widget)->pixbuf_cache)
4242                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4243
4244         GTK_WIDGET_CLASS (ev_view_parent_class)->style_updated (widget);
4245 }
4246
4247 /*** Drawing ***/
4248
4249 static void
4250 draw_rubberband (EvView             *view,
4251                  cairo_t            *cr,
4252                  const GdkRectangle *rect,
4253                  gdouble             alpha)
4254 {
4255         GtkStyleContext *context;
4256         GdkRGBA          color;
4257
4258         context = gtk_widget_get_style_context (GTK_WIDGET (view));
4259         gtk_style_context_get_background_color (context, GTK_STATE_FLAG_SELECTED, &color);
4260         cairo_save (cr);
4261
4262         cairo_set_source_rgba (cr, color.red, color.green, color.blue, alpha);
4263         cairo_rectangle (cr,
4264                          rect->x - view->scroll_x,
4265                          rect->y - view->scroll_y,
4266                          rect->width, rect->height);
4267         cairo_fill_preserve (cr);
4268
4269         cairo_set_line_width (cr, 0.5);
4270         cairo_set_source_rgb (cr, color.red, color.green, color.blue);
4271         cairo_stroke (cr);
4272
4273         cairo_restore (cr);
4274 }
4275
4276
4277 static void
4278 highlight_find_results (EvView *view,
4279                         cairo_t *cr,
4280                         int page)
4281 {
4282         gint       i, n_results = 0;
4283         n_results = ev_view_find_get_n_results (view, page);
4284
4285         for (i = 0; i < n_results; i++) {
4286                 EvRectangle *rectangle;
4287                 GdkRectangle view_rectangle;
4288                 gdouble      alpha;
4289
4290                 if (i == view->find_result && page == view->current_page) {
4291                         alpha = 0.6;
4292                 } else {
4293                         alpha = 0.3;
4294                 }
4295
4296                 rectangle = ev_view_find_get_result (view, page, i);
4297                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4298                 draw_rubberband (view, cr, &view_rectangle, alpha);
4299         }
4300 }
4301
4302 static void
4303 highlight_forward_search_results (EvView *view,
4304                                   cairo_t *cr,
4305                                   int page)
4306 {
4307         GdkRectangle rect;
4308         EvMapping   *mapping = view->synctex_result;
4309
4310         if (GPOINTER_TO_INT (mapping->data) != page)
4311                 return;
4312
4313         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4314
4315         cairo_save (cr);
4316         cairo_set_source_rgb (cr, 1., 0., 0.);
4317         cairo_rectangle (cr,
4318                          rect.x - view->scroll_x,
4319                          rect.y - view->scroll_y,
4320                          rect.width, rect.height);
4321         cairo_stroke (cr);
4322         cairo_restore (cr);
4323 }
4324
4325 static void
4326 focus_annotation (EvView       *view,
4327                   cairo_t      *cr,
4328                   gint          page,
4329                   GdkRectangle *clip)
4330 {
4331         GtkWidget    *widget = GTK_WIDGET (view);
4332         GdkRectangle  rect;
4333         EvMapping    *mapping = view->focus_annotation;
4334         EvAnnotation *annot = (EvAnnotation *)mapping->data;
4335
4336         if (ev_annotation_get_page_index (annot) != page)
4337                 return;
4338
4339         doc_rect_to_view_rect (view, page, &mapping->area, &rect);
4340
4341         gtk_render_focus (gtk_widget_get_style_context (widget),
4342                           cr,
4343                           rect.x - view->scroll_x,
4344                           rect.y - view->scroll_y,
4345                           rect.width + 1, rect.height + 1);
4346 }
4347
4348 static void
4349 ev_view_loading_window_move (EvView *view)
4350 {
4351         GtkWidget       *widget = GTK_WIDGET (view);
4352         EvLoadingWindow *window = EV_LOADING_WINDOW (view->loading_window);
4353         gint             root_x, root_y;
4354         gint             window_width;
4355         GtkAllocation    allocation;
4356
4357         gtk_widget_get_allocation (widget, &allocation);
4358         gdk_window_get_origin (gtk_widget_get_window (widget), &root_x, &root_y);
4359         ev_loading_window_get_size (window, &window_width, NULL);
4360
4361         root_x += allocation.width - window_width - 10;
4362         root_y += 10;
4363
4364         ev_loading_window_move (window, root_x, root_y);
4365 }
4366
4367 static gboolean
4368 show_loading_window_cb (EvView *view)
4369 {
4370         if (!view->loading_window) {
4371                 GtkWindow *parent;
4372                 GdkScreen *screen;
4373
4374                 parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
4375                 view->loading_window = ev_loading_window_new (parent);
4376
4377                 /* Show the window off screen to get a valid size asap */
4378                 screen = gtk_widget_get_screen (GTK_WIDGET (view));
4379                 gtk_window_move (GTK_WINDOW (view->loading_window),
4380                                  gdk_screen_get_width (screen) + 1,
4381                                  gdk_screen_get_height (screen) + 1);
4382                 gtk_widget_show (view->loading_window);
4383         }
4384
4385         ev_view_loading_window_move (view);
4386
4387         gtk_widget_show (view->loading_window);
4388
4389         view->loading_timeout = 0;
4390
4391         return FALSE;
4392 }
4393
4394 static void
4395 show_loading_window (EvView *view)
4396 {
4397         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4398                 ev_view_loading_window_move (view);
4399                 return;
4400         }
4401
4402         if (!view->loading_timeout) {
4403                 view->loading_timeout =
4404                         g_timeout_add_full (G_PRIORITY_LOW,
4405                                             0.5, (GSourceFunc)show_loading_window_cb,
4406                                             view, NULL);
4407         }
4408 }
4409
4410 static void
4411 hide_loading_window (EvView *view)
4412 {
4413         if (view->loading_timeout) {
4414                 g_source_remove (view->loading_timeout);
4415                 view->loading_timeout = 0;
4416         }
4417
4418         if (view->loading_window && gtk_widget_get_visible (view->loading_window)) {
4419                 gtk_widget_hide (view->loading_window);
4420         }
4421 }
4422
4423 static void
4424 draw_one_page (EvView       *view,
4425                gint          page,
4426                cairo_t      *cr,
4427                GdkRectangle *page_area,
4428                GtkBorder    *border,
4429                GdkRectangle *expose_area,
4430                gboolean     *page_ready)
4431 {
4432         GdkRectangle overlap;
4433         GdkRectangle real_page_area;
4434         gint         current_page;
4435         gboolean     inverted_colors;
4436
4437         g_assert (view->document);
4438
4439         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4440                 return;
4441
4442         /* Render the document itself */
4443         real_page_area = *page_area;
4444
4445         real_page_area.x += border->left;
4446         real_page_area.y += border->top;
4447         real_page_area.width -= (border->left + border->right);
4448         real_page_area.height -= (border->top + border->bottom);
4449         *page_ready = TRUE;
4450
4451         current_page = ev_document_model_get_page (view->model);
4452         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4453         ev_document_misc_paint_one_page (cr,
4454                                          GTK_WIDGET (view),
4455                                          page_area, border,
4456                                          page == current_page,
4457                                          inverted_colors);
4458
4459         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4460                 gint             width, height;
4461                 gint             page_width, page_height;
4462                 cairo_surface_t *page_surface = NULL;
4463                 gint             selection_width, selection_height;
4464                 cairo_surface_t *selection_surface = NULL;
4465
4466                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4467
4468                 if (!page_surface) {
4469                         if (page == current_page)
4470                                 show_loading_window (view);
4471
4472                         *page_ready = FALSE;
4473
4474                         return;
4475                 }
4476
4477                 if (page == current_page)
4478                         hide_loading_window (view);
4479
4480                 ev_view_get_page_size (view, page, &width, &height);
4481
4482                 page_width = cairo_image_surface_get_width (page_surface);
4483                 page_height = cairo_image_surface_get_height (page_surface);
4484
4485                 cairo_save (cr);
4486                 cairo_translate (cr, overlap.x, overlap.y);
4487
4488                 if (width != page_width || height != page_height) {
4489                         cairo_pattern_set_filter (cairo_get_source (cr),
4490                                                   CAIRO_FILTER_FAST);
4491                         cairo_scale (cr,
4492                                      (gdouble)width / page_width,
4493                                      (gdouble)height / page_height);
4494                 }
4495
4496                 cairo_surface_set_device_offset (page_surface,
4497                                                  overlap.x - real_page_area.x,
4498                                                  overlap.y - real_page_area.y);
4499                 cairo_set_source_surface (cr, page_surface, 0, 0);
4500                 cairo_paint (cr);
4501                 cairo_restore (cr);
4502
4503                 /* Get the selection pixbuf iff we have something to draw */
4504                 if (find_selection_for_page (view, page) &&
4505                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4506                         selection_surface =
4507                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4508                                                                        page,
4509                                                                        view->scale,
4510                                                                        NULL);
4511                 }
4512
4513                 if (!selection_surface) {
4514                         return;
4515                 }
4516
4517                 selection_width = cairo_image_surface_get_width (selection_surface);
4518                 selection_height = cairo_image_surface_get_height (selection_surface);
4519
4520                 cairo_save (cr);
4521                 cairo_translate (cr, overlap.x, overlap.y);
4522
4523                 if (width != selection_width || height != selection_height) {
4524                         cairo_pattern_set_filter (cairo_get_source (cr),
4525                                                   CAIRO_FILTER_FAST);
4526                         cairo_scale (cr,
4527                                      (gdouble)width / selection_width,
4528                                      (gdouble)height / selection_height);
4529                 }
4530
4531                 cairo_surface_set_device_offset (selection_surface,
4532                                                  overlap.x - real_page_area.x,
4533                                                  overlap.y - real_page_area.y);
4534
4535                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4536                 cairo_paint (cr);
4537                 cairo_restore (cr);
4538         }
4539 }
4540
4541 /*** GObject functions ***/
4542
4543 static void
4544 ev_view_finalize (GObject *object)
4545 {
4546         EvView *view = EV_VIEW (object);
4547
4548         clear_selection (view);
4549         clear_link_selected (view);
4550
4551         if (view->synctex_result) {
4552                 g_free (view->synctex_result);
4553                 view->synctex_result = NULL;
4554         }
4555
4556         if (view->image_dnd_info.image)
4557                 g_object_unref (view->image_dnd_info.image);
4558         view->image_dnd_info.image = NULL;
4559
4560         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4561 }
4562
4563 static void
4564 ev_view_dispose (GObject *object)
4565 {
4566         EvView *view = EV_VIEW (object);
4567
4568         if (view->model) {
4569                 g_object_unref (view->model);
4570                 view->model = NULL;
4571         }
4572
4573         if (view->pixbuf_cache) {
4574                 g_object_unref (view->pixbuf_cache);
4575                 view->pixbuf_cache = NULL;
4576         }
4577
4578         if (view->document) {
4579                 g_object_unref (view->document);
4580                 view->document = NULL;
4581         }
4582
4583         if (view->page_cache) {
4584                 g_object_unref (view->page_cache);
4585                 view->page_cache = NULL;
4586         }
4587
4588         ev_view_window_children_free (view);
4589
4590         if (view->selection_scroll_id) {
4591             g_source_remove (view->selection_scroll_id);
4592             view->selection_scroll_id = 0;
4593         }
4594
4595         if (view->selection_update_id) {
4596             g_source_remove (view->selection_update_id);
4597             view->selection_update_id = 0;
4598         }
4599
4600         if (view->scroll_info.timeout_id) {
4601             g_source_remove (view->scroll_info.timeout_id);
4602             view->scroll_info.timeout_id = 0;
4603         }
4604
4605         if (view->drag_info.drag_timeout_id) {
4606                 g_source_remove (view->drag_info.drag_timeout_id);
4607                 view->drag_info.drag_timeout_id = 0;
4608         }
4609
4610         if (view->drag_info.release_timeout_id) {
4611                 g_source_remove (view->drag_info.release_timeout_id);
4612                 view->drag_info.release_timeout_id = 0;
4613         }
4614
4615         if (view->loading_timeout) {
4616                 g_source_remove (view->loading_timeout);
4617                 view->loading_timeout = 0;
4618         }
4619
4620         gtk_scrollable_set_hadjustment (GTK_SCROLLABLE (view), NULL);
4621         gtk_scrollable_set_vadjustment (GTK_SCROLLABLE (view), NULL);
4622
4623         G_OBJECT_CLASS (ev_view_parent_class)->dispose (object);
4624 }
4625
4626 static void
4627 ev_view_get_property (GObject     *object,
4628                       guint        prop_id,
4629                       GValue      *value,
4630                       GParamSpec  *pspec)
4631 {
4632         EvView *view = EV_VIEW (object);
4633
4634         switch (prop_id) {
4635         case PROP_HADJUSTMENT:
4636                 g_value_set_object (value, view->hadjustment);
4637                 break;
4638         case PROP_VADJUSTMENT:
4639                 g_value_set_object (value, view->vadjustment);
4640                 break;
4641         case PROP_HSCROLL_POLICY:
4642                 g_value_set_enum (value, view->hscroll_policy);
4643                 break;
4644         case PROP_VSCROLL_POLICY:
4645                 g_value_set_enum (value, view->vscroll_policy);
4646                 break;
4647         default:
4648                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4649                 break;
4650         }
4651 }
4652
4653 static void
4654 ev_view_set_property (GObject      *object,
4655                       guint         prop_id,
4656                       const GValue *value,
4657                       GParamSpec   *pspec)
4658 {
4659         EvView *view = EV_VIEW (object);
4660
4661         switch (prop_id) {
4662         case PROP_HADJUSTMENT:
4663                 ev_view_set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL,
4664                                                (GtkAdjustment *) g_value_get_object (value));
4665                 break;
4666         case PROP_VADJUSTMENT:
4667                 ev_view_set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL,
4668                                                (GtkAdjustment *) g_value_get_object (value));
4669                 break;
4670         case PROP_HSCROLL_POLICY:
4671                 view->hscroll_policy = g_value_get_enum (value);
4672                 gtk_widget_queue_resize (GTK_WIDGET (view));
4673                 break;
4674         case PROP_VSCROLL_POLICY:
4675                 view->vscroll_policy = g_value_get_enum (value);
4676                 gtk_widget_queue_resize (GTK_WIDGET (view));
4677                 break;
4678         default:
4679                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4680                 break;
4681         }
4682 }
4683
4684 /* Accessibility */
4685 static void
4686 ev_view_init_accessibility (EvView *view)
4687 {
4688         static gboolean first_time = TRUE;
4689
4690         if (first_time) {
4691                 AtkObjectFactory *factory;
4692                 AtkRegistry *registry;
4693                 GType derived_type;
4694                 GType derived_atk_type;
4695
4696                 /*
4697                  * Figure out whether accessibility is enabled by looking at the
4698                  * type of the accessible object which would be created for
4699                  * the parent type of EvView.
4700                  */
4701                 derived_type = g_type_parent (EV_TYPE_VIEW);
4702
4703                 registry = atk_get_default_registry ();
4704                 factory = atk_registry_get_factory (registry,
4705                                                     derived_type);
4706                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4707                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE)) {
4708                         atk_registry_set_factory_type (registry,
4709                                                        EV_TYPE_VIEW,
4710                                                        ev_view_accessible_factory_get_type ());
4711                         view->a11y_enabled = TRUE;
4712                 }
4713                 first_time = FALSE;
4714         }
4715 }
4716
4717 static AtkObject *
4718 ev_view_get_accessible (GtkWidget *widget)
4719 {
4720         ev_view_init_accessibility (EV_VIEW (widget));
4721         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4722 }
4723
4724 static gboolean
4725 ev_view_is_a11y_enabled (EvView *view)
4726 {
4727         ev_view_init_accessibility (view);
4728         return view->a11y_enabled;
4729 }
4730
4731 /* GtkContainer */
4732 static void
4733 ev_view_remove (GtkContainer *container,
4734                 GtkWidget    *widget)
4735 {
4736         EvView *view = EV_VIEW (container);
4737         GList *tmp_list = view->children;
4738         EvViewChild *child;
4739
4740         while (tmp_list) {
4741                 child = tmp_list->data;
4742
4743                 if (child->widget == widget) {
4744                         gtk_widget_unparent (widget);
4745
4746                         view->children = g_list_remove_link (view->children, tmp_list);
4747                         g_list_free_1 (tmp_list);
4748                         g_slice_free (EvViewChild, child);
4749
4750                         return;
4751                 }
4752
4753                 tmp_list = tmp_list->next;
4754         }
4755 }
4756
4757 static void
4758 ev_view_forall (GtkContainer *container,
4759                 gboolean      include_internals,
4760                 GtkCallback   callback,
4761                 gpointer      callback_data)
4762 {
4763         EvView *view = EV_VIEW (container);
4764         GList *tmp_list = view->children;
4765         EvViewChild *child;
4766
4767         while (tmp_list) {
4768                 child = tmp_list->data;
4769                 tmp_list = tmp_list->next;
4770
4771                 (* callback) (child->widget, callback_data);
4772         }
4773 }
4774
4775 static void
4776 ev_view_class_init (EvViewClass *class)
4777 {
4778         GObjectClass *object_class = G_OBJECT_CLASS (class);
4779         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4780         GtkContainerClass *container_class = GTK_CONTAINER_CLASS (class);
4781         GtkBindingSet *binding_set;
4782
4783         object_class->get_property = ev_view_get_property;
4784         object_class->set_property = ev_view_set_property;
4785         object_class->dispose = ev_view_dispose;
4786         object_class->finalize = ev_view_finalize;
4787
4788         widget_class->realize = ev_view_realize;
4789         widget_class->draw = ev_view_draw;
4790         widget_class->button_press_event = ev_view_button_press_event;
4791         widget_class->motion_notify_event = ev_view_motion_notify_event;
4792         widget_class->button_release_event = ev_view_button_release_event;
4793         widget_class->key_press_event = ev_view_key_press_event;
4794         widget_class->focus_in_event = ev_view_focus_in;
4795         widget_class->focus_out_event = ev_view_focus_out;
4796         widget_class->get_accessible = ev_view_get_accessible;
4797         widget_class->get_preferred_width = ev_view_get_preferred_width;
4798         widget_class->get_preferred_height = ev_view_get_preferred_height;
4799         widget_class->size_allocate = ev_view_size_allocate;
4800         widget_class->scroll_event = ev_view_scroll_event;
4801         widget_class->enter_notify_event = ev_view_enter_notify_event;
4802         widget_class->leave_notify_event = ev_view_leave_notify_event;
4803         widget_class->style_updated = ev_view_style_updated;
4804         widget_class->drag_data_get = ev_view_drag_data_get;
4805         widget_class->drag_motion = ev_view_drag_motion;
4806         widget_class->popup_menu = ev_view_popup_menu;
4807         widget_class->query_tooltip = ev_view_query_tooltip;
4808
4809         container_class->remove = ev_view_remove;
4810         container_class->forall = ev_view_forall;
4811
4812         class->binding_activated = ev_view_scroll;
4813
4814         /* Scrollable interface */
4815         g_object_class_override_property (object_class, PROP_HADJUSTMENT, "hadjustment");
4816         g_object_class_override_property (object_class, PROP_VADJUSTMENT, "vadjustment");
4817         g_object_class_override_property (object_class, PROP_HSCROLL_POLICY, "hscroll-policy");
4818         g_object_class_override_property (object_class, PROP_VSCROLL_POLICY, "vscroll-policy");
4819
4820         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4821                          G_TYPE_FROM_CLASS (object_class),
4822                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4823                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4824                          NULL, NULL,
4825                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4826                          G_TYPE_NONE, 2,
4827                          GTK_TYPE_SCROLL_TYPE,
4828                          G_TYPE_BOOLEAN);
4829         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4830                          G_TYPE_FROM_CLASS (object_class),
4831                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4832                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4833                          NULL, NULL,
4834                          g_cclosure_marshal_VOID__OBJECT,
4835                          G_TYPE_NONE, 1,
4836                          G_TYPE_OBJECT);
4837         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4838                          G_TYPE_FROM_CLASS (object_class),
4839                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4840                          G_STRUCT_OFFSET (EvViewClass, external_link),
4841                          NULL, NULL,
4842                          g_cclosure_marshal_VOID__OBJECT,
4843                          G_TYPE_NONE, 1,
4844                          G_TYPE_OBJECT);
4845         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4846                          G_TYPE_FROM_CLASS (object_class),
4847                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4848                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4849                          NULL, NULL,
4850                          g_cclosure_marshal_VOID__POINTER,
4851                          G_TYPE_NONE, 1,
4852                          G_TYPE_POINTER);
4853         signals[SIGNAL_SELECTION_CHANGED] = g_signal_new ("selection-changed",
4854                          G_TYPE_FROM_CLASS (object_class),
4855                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4856                          G_STRUCT_OFFSET (EvViewClass, selection_changed),
4857                          NULL, NULL,
4858                          g_cclosure_marshal_VOID__VOID,
4859                          G_TYPE_NONE, 0,
4860                          G_TYPE_NONE);
4861         signals[SIGNAL_SYNC_SOURCE] = g_signal_new ("sync-source",
4862                          G_TYPE_FROM_CLASS (object_class),
4863                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4864                          G_STRUCT_OFFSET (EvViewClass, sync_source),
4865                          NULL, NULL,
4866                          g_cclosure_marshal_VOID__POINTER,
4867                          G_TYPE_NONE, 1,
4868                          G_TYPE_POINTER);
4869         signals[SIGNAL_ANNOT_ADDED] = g_signal_new ("annot-added",
4870                          G_TYPE_FROM_CLASS (object_class),
4871                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4872                          G_STRUCT_OFFSET (EvViewClass, annot_added),
4873                          NULL, NULL,
4874                          g_cclosure_marshal_VOID__OBJECT,
4875                          G_TYPE_NONE, 1,
4876                          EV_TYPE_ANNOTATION);
4877         signals[SIGNAL_LAYERS_CHANGED] = g_signal_new ("layers-changed",
4878                          G_TYPE_FROM_CLASS (object_class),
4879                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4880                          G_STRUCT_OFFSET (EvViewClass, layers_changed),
4881                          NULL, NULL,
4882                          g_cclosure_marshal_VOID__VOID,
4883                          G_TYPE_NONE, 0,
4884                          G_TYPE_NONE);
4885
4886         binding_set = gtk_binding_set_by_class (class);
4887
4888         add_scroll_binding_keypad (binding_set, GDK_KEY_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4889         add_scroll_binding_keypad (binding_set, GDK_KEY_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4890         add_scroll_binding_keypad (binding_set, GDK_KEY_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4891         add_scroll_binding_keypad (binding_set, GDK_KEY_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4892         add_scroll_binding_keypad (binding_set, GDK_KEY_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4893         add_scroll_binding_keypad (binding_set, GDK_KEY_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4894         add_scroll_binding_keypad (binding_set, GDK_KEY_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4895         add_scroll_binding_keypad (binding_set, GDK_KEY_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4896         gtk_binding_entry_add_signal (binding_set, GDK_KEY_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4897                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4898         gtk_binding_entry_add_signal (binding_set, GDK_KEY_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4899                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4900         gtk_binding_entry_add_signal (binding_set, GDK_KEY_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4901                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4902         gtk_binding_entry_add_signal (binding_set, GDK_KEY_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4903                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4904
4905 }
4906
4907 static void
4908 ev_view_init (EvView *view)
4909 {
4910         gtk_widget_set_has_window (GTK_WIDGET (view), TRUE);
4911         gtk_widget_set_can_focus (GTK_WIDGET (view), TRUE);
4912         gtk_widget_set_redraw_on_allocate (GTK_WIDGET (view), FALSE);
4913         gtk_container_set_resize_mode (GTK_CONTAINER (view), GTK_RESIZE_QUEUE);
4914
4915         gtk_widget_set_events (GTK_WIDGET (view),
4916                                GDK_EXPOSURE_MASK |
4917                                GDK_BUTTON_PRESS_MASK |
4918                                GDK_BUTTON_RELEASE_MASK |
4919                                GDK_SCROLL_MASK |
4920                                GDK_KEY_PRESS_MASK |
4921                                GDK_POINTER_MOTION_MASK |
4922                                GDK_POINTER_MOTION_HINT_MASK |
4923                                GDK_ENTER_NOTIFY_MASK |
4924                                GDK_LEAVE_NOTIFY_MASK);
4925
4926         view->start_page = -1;
4927         view->end_page = -1;
4928         view->spacing = 5;
4929         view->scale = 1.0;
4930         view->current_page = 0;
4931         view->pressed_button = -1;
4932         view->cursor = EV_VIEW_CURSOR_NORMAL;
4933         view->drag_info.in_drag = FALSE;
4934         view->scroll_info.autoscrolling = FALSE;
4935         view->selection_info.selections = NULL;
4936         view->selection_info.in_selection = FALSE;
4937         view->selection_info.in_drag = FALSE;
4938         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4939         view->continuous = TRUE;
4940         view->dual_page = FALSE;
4941         view->fullscreen = FALSE;
4942         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4943         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4944         view->jump_to_find_result = TRUE;
4945         view->highlight_find_results = FALSE;
4946 }
4947
4948 /*** Callbacks ***/
4949
4950 static void
4951 ev_view_change_page (EvView *view,
4952                      gint    new_page)
4953 {
4954         gint x, y;
4955
4956         view->current_page = new_page;
4957         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4958
4959         hide_loading_window (view);
4960
4961         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4962         ev_view_handle_cursor_over_xy (view, x, y);
4963
4964         gtk_widget_queue_resize (GTK_WIDGET (view));
4965 }
4966
4967 static void
4968 job_finished_cb (EvPixbufCache  *pixbuf_cache,
4969                  cairo_region_t *region,
4970                  EvView         *view)
4971 {
4972         if (region) {
4973                 gdk_window_invalidate_region (gtk_widget_get_window (GTK_WIDGET (view)), region, TRUE);
4974         } else {
4975                 gtk_widget_queue_draw (GTK_WIDGET (view));
4976         }
4977 }
4978
4979 static void
4980 ev_view_page_changed_cb (EvDocumentModel *model,
4981                          gint             old_page,
4982                          gint             new_page,
4983                          EvView          *view)
4984 {
4985         if (!view->document)
4986                 return;
4987
4988         if (view->current_page != new_page) {
4989                 ev_view_change_page (view, new_page);
4990         } else {
4991                 gtk_widget_queue_draw (GTK_WIDGET (view));
4992         }
4993
4994         view->find_result = 0;
4995 }
4996
4997 static void
4998 on_adjustment_value_changed (GtkAdjustment *adjustment,
4999                              EvView        *view)
5000 {
5001         GtkWidget *widget = GTK_WIDGET (view);
5002         int dx = 0, dy = 0;
5003         gint x, y;
5004         gint value;
5005         GList *l;
5006
5007         if (!gtk_widget_get_realized (widget))
5008                 return;
5009
5010         if (view->hadjustment) {
5011                 value = (gint) gtk_adjustment_get_value (view->hadjustment);
5012                 dx = view->scroll_x - value;
5013                 view->scroll_x = value;
5014         } else {
5015                 view->scroll_x = 0;
5016         }
5017
5018         if (view->vadjustment) {
5019                 value = (gint) gtk_adjustment_get_value (view->vadjustment);
5020                 dy = view->scroll_y - value;
5021                 view->scroll_y = value;
5022         } else {
5023                 view->scroll_y = 0;
5024         }
5025
5026         for (l = view->children; l && l->data; l = g_list_next (l)) {
5027                 EvViewChild *child = (EvViewChild *)l->data;
5028
5029                 child->x += dx;
5030                 child->y += dy;
5031                 if (gtk_widget_get_visible (child->widget) && gtk_widget_get_visible (widget))
5032                         gtk_widget_queue_resize (widget);
5033         }
5034
5035         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
5036                 EvViewWindowChild *child;
5037
5038                 child = (EvViewWindowChild *)l->data;
5039
5040                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
5041         }
5042
5043         if (view->pending_resize) {
5044                 gtk_widget_queue_draw (widget);
5045         } else {
5046                 gdk_window_scroll (gtk_widget_get_window (widget), dx, dy);
5047         }
5048
5049         gtk_widget_get_pointer (widget, &x, &y);
5050         ev_view_handle_cursor_over_xy (view, x, y);
5051
5052         if (view->document)
5053                 view_update_range_and_current_page (view);
5054 }
5055
5056 GtkWidget*
5057 ev_view_new (void)
5058 {
5059         GtkWidget *view;
5060
5061         view = g_object_new (EV_TYPE_VIEW, NULL);
5062
5063         return view;
5064 }
5065
5066 static void
5067 setup_caches (EvView *view)
5068 {
5069         gboolean inverted_colors;
5070
5071         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
5072         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->model, view->pixbuf_cache_size);
5073         view->page_cache = ev_page_cache_new (view->document);
5074         if (ev_view_is_a11y_enabled (view)) {
5075                 EvJobPageDataFlags flags = ev_page_cache_get_flags (view->page_cache);
5076
5077                 ev_page_cache_set_flags (view->page_cache,
5078                                          flags |
5079                                          EV_PAGE_DATA_INCLUDE_TEXT_LAYOUT |
5080                                          EV_PAGE_DATA_INCLUDE_TEXT);
5081         }
5082         inverted_colors = ev_document_model_get_inverted_colors (view->model);
5083         ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
5084         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
5085 }
5086
5087 static void
5088 clear_caches (EvView *view)
5089 {
5090         if (view->pixbuf_cache) {
5091                 g_object_unref (view->pixbuf_cache);
5092                 view->pixbuf_cache = NULL;
5093         }
5094
5095         if (view->page_cache) {
5096                 g_object_unref (view->page_cache);
5097                 view->page_cache = NULL;
5098         }
5099 }
5100
5101 /**
5102  * ev_view_set_page_cache_size:
5103  * @view:
5104  * @cache_size:
5105  *
5106  * Sets the maximum size in bytes that will be used to cache
5107  * rendered pages. Use 0 to disable caching rendered pages.
5108  *
5109  * Note that this limit doesn't affect the current visible page range,
5110  * which will always be rendered. In order to limit the total memory used
5111  * you have to use ev_document_model_set_max_scale() too.
5112  *
5113  */
5114 void
5115 ev_view_set_page_cache_size (EvView *view,
5116                              gsize   cache_size)
5117 {
5118         if (view->pixbuf_cache_size == cache_size)
5119                 return;
5120
5121         view->pixbuf_cache_size = cache_size;
5122         if (view->pixbuf_cache)
5123                 ev_pixbuf_cache_set_max_size (view->pixbuf_cache, cache_size);
5124 }
5125
5126 void
5127 ev_view_set_loading (EvView       *view,
5128                      gboolean      loading)
5129 {
5130         if (view->loading && !loading)
5131                 hide_loading_window (view);
5132         view->loading = loading;
5133         gtk_widget_queue_draw (GTK_WIDGET (view));
5134 }
5135
5136 static gboolean
5137 ev_view_autoscroll_cb (EvView *view)
5138 {
5139         gdouble speed, value;
5140
5141         /* If the user stops autoscrolling, autoscrolling will be
5142          * set to false but the timeout will continue; stop the timeout: */
5143         if (!view->scroll_info.autoscrolling) {
5144                 view->scroll_info.timeout_id = 0;
5145                 return FALSE;
5146         }
5147
5148         if (view->scroll_info.last_y > view->scroll_info.start_y &&
5149                 (view->scroll_info.last_y < view->scroll_info.start_y))
5150                 return TRUE;
5151
5152         /* Replace 100 with your speed of choice: The lower the faster.
5153          * Replace 3 with another speed of choice: The higher, the faster it accelerated
5154          *      based on the distance of the starting point from the mouse
5155          * (All also effected by the timeout interval of this callback) */
5156
5157         if (view->scroll_info.start_y > view->scroll_info.last_y)
5158                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
5159         else
5160                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
5161
5162         value = gtk_adjustment_get_value (view->vadjustment);
5163         value = CLAMP (value + speed, 0,
5164                        gtk_adjustment_get_upper (view->vadjustment) -
5165                        gtk_adjustment_get_page_size (view->vadjustment));
5166         gtk_adjustment_set_value (view->vadjustment, value);
5167
5168         return TRUE;
5169
5170 }
5171
5172 void
5173 ev_view_autoscroll_start (EvView *view)
5174 {
5175         gint x, y;
5176
5177         g_return_if_fail (EV_IS_VIEW (view));
5178
5179         if (view->scroll_info.autoscrolling)
5180                 return;
5181
5182         view->scroll_info.autoscrolling = TRUE;
5183         view->scroll_info.timeout_id =
5184                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5185                                view);
5186
5187         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5188         ev_view_handle_cursor_over_xy (view, x, y);
5189 }
5190
5191 void
5192 ev_view_autoscroll_stop (EvView *view)
5193 {
5194         gint x, y;
5195
5196         g_return_if_fail (EV_IS_VIEW (view));
5197
5198         if (!view->scroll_info.autoscrolling)
5199                 return;
5200
5201         view->scroll_info.autoscrolling = FALSE;
5202         if (view->scroll_info.timeout_id) {
5203                 g_source_remove (view->scroll_info.timeout_id);
5204                 view->scroll_info.timeout_id = 0;
5205         }
5206
5207         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5208         ev_view_handle_cursor_over_xy (view, x, y);
5209 }
5210
5211 static void
5212 ev_view_document_changed_cb (EvDocumentModel *model,
5213                              GParamSpec      *pspec,
5214                              EvView          *view)
5215 {
5216         EvDocument *document = ev_document_model_get_document (model);
5217
5218         if (document != view->document) {
5219                 gint current_page;
5220
5221                 clear_caches (view);
5222                 ev_view_remove_all (view);
5223
5224                 if (view->document) {
5225                         g_object_unref (view->document);
5226                 }
5227
5228                 view->document = document;
5229                 view->find_result = 0;
5230
5231                 if (view->document) {
5232                         view->loading = FALSE;
5233                         g_object_ref (view->document);
5234                         setup_caches (view);
5235                 }
5236
5237                 current_page = ev_document_model_get_page (model);
5238                 if (view->current_page != current_page) {
5239                         ev_view_change_page (view, current_page);
5240                 } else {
5241                         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
5242                         gtk_widget_queue_resize (GTK_WIDGET (view));
5243                 }
5244         }
5245 }
5246
5247 static void
5248 ev_view_rotation_changed_cb (EvDocumentModel *model,
5249                              GParamSpec      *pspec,
5250                              EvView          *view)
5251 {
5252         gint rotation = ev_document_model_get_rotation (model);
5253
5254         view->rotation = rotation;
5255
5256         if (view->pixbuf_cache) {
5257                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5258                 if (!ev_document_is_page_size_uniform (view->document))
5259                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5260                 gtk_widget_queue_resize (GTK_WIDGET (view));
5261         }
5262
5263         ev_view_remove_all (view);
5264
5265         if (rotation != 0)
5266                 clear_selection (view);
5267 }
5268
5269 static void
5270 ev_view_inverted_colors_changed_cb (EvDocumentModel *model,
5271                                     GParamSpec      *pspec,
5272                                     EvView          *view)
5273 {
5274         if (view->pixbuf_cache) {
5275                 gboolean inverted_colors;
5276
5277                 inverted_colors = ev_document_model_get_inverted_colors (model);
5278                 ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
5279                 gtk_widget_queue_draw (GTK_WIDGET (view));
5280         }
5281 }
5282
5283 static void
5284 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
5285                                 GParamSpec      *pspec,
5286                                 EvView          *view)
5287 {
5288         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
5289
5290         view->sizing_mode = mode;
5291         if (mode != EV_SIZING_FREE)
5292                 gtk_widget_queue_resize (GTK_WIDGET (view));
5293 }
5294
5295 #define EPSILON 0.0000001
5296 static void
5297 ev_view_scale_changed_cb (EvDocumentModel *model,
5298                           GParamSpec      *pspec,
5299                           EvView          *view)
5300 {
5301         gdouble scale = ev_document_model_get_scale (model);
5302
5303         if (ABS (view->scale - scale) < EPSILON)
5304                 return;
5305
5306         view->scale = scale;
5307
5308         view->pending_resize = TRUE;
5309         if (view->sizing_mode == EV_SIZING_FREE)
5310                 gtk_widget_queue_resize (GTK_WIDGET (view));
5311 }
5312
5313 static void
5314 ev_view_continuous_changed_cb (EvDocumentModel *model,
5315                                GParamSpec      *pspec,
5316                                EvView          *view)
5317 {
5318         gboolean continuous = ev_document_model_get_continuous (model);
5319
5320         view->continuous = continuous;
5321         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5322         gtk_widget_queue_resize (GTK_WIDGET (view));
5323 }
5324
5325 static void
5326 ev_view_dual_page_changed_cb (EvDocumentModel *model,
5327                               GParamSpec      *pspec,
5328                               EvView          *view)
5329 {
5330         gboolean dual_page = ev_document_model_get_dual_page (model);
5331
5332         view->dual_page = dual_page;
5333         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5334         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5335          * preload_cache_size to be 2 if dual_page is set.
5336          */
5337         gtk_widget_queue_resize (GTK_WIDGET (view));
5338 }
5339
5340 static void
5341 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
5342                                GParamSpec      *pspec,
5343                                EvView          *view)
5344 {
5345         gboolean fullscreen = ev_document_model_get_fullscreen (model);
5346
5347         view->fullscreen = fullscreen;
5348         gtk_widget_queue_resize (GTK_WIDGET (view));
5349 }
5350
5351 void
5352 ev_view_set_model (EvView          *view,
5353                    EvDocumentModel *model)
5354 {
5355         g_return_if_fail (EV_IS_VIEW (view));
5356         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
5357
5358         if (model == view->model)
5359                 return;
5360
5361         if (view->model) {
5362                 g_signal_handlers_disconnect_by_func (view->model,
5363                                                       ev_view_document_changed_cb,
5364                                                       view);
5365                 g_signal_handlers_disconnect_by_func (view->model,
5366                                                       ev_view_page_changed_cb,
5367                                                       view);
5368                 g_object_unref (view->model);
5369         }
5370         view->model = g_object_ref (model);
5371
5372         /* Initialize view from model */
5373         view->rotation = ev_document_model_get_rotation (view->model);
5374         view->sizing_mode = ev_document_model_get_sizing_mode (view->model);
5375         view->scale = ev_document_model_get_scale (view->model);
5376         view->continuous = ev_document_model_get_continuous (view->model);
5377         view->dual_page = ev_document_model_get_dual_page (view->model);
5378         view->fullscreen = ev_document_model_get_fullscreen (view->model);
5379         ev_view_document_changed_cb (view->model, NULL, view);
5380
5381         g_signal_connect (view->model, "notify::document",
5382                           G_CALLBACK (ev_view_document_changed_cb),
5383                           view);
5384         g_signal_connect (view->model, "notify::rotation",
5385                           G_CALLBACK (ev_view_rotation_changed_cb),
5386                           view);
5387         g_signal_connect (view->model, "notify::inverted-colors",
5388                           G_CALLBACK (ev_view_inverted_colors_changed_cb),
5389                           view);
5390         g_signal_connect (view->model, "notify::sizing-mode",
5391                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
5392                           view);
5393         g_signal_connect (view->model, "notify::scale",
5394                           G_CALLBACK (ev_view_scale_changed_cb),
5395                           view);
5396         g_signal_connect (view->model, "notify::continuous",
5397                           G_CALLBACK (ev_view_continuous_changed_cb),
5398                           view);
5399         g_signal_connect (view->model, "notify::dual-page",
5400                           G_CALLBACK (ev_view_dual_page_changed_cb),
5401                           view);
5402         g_signal_connect (view->model, "notify::fullscreen",
5403                           G_CALLBACK (ev_view_fullscreen_changed_cb),
5404                           view);
5405         g_signal_connect (view->model, "page-changed",
5406                           G_CALLBACK (ev_view_page_changed_cb),
5407                           view);
5408 }
5409
5410 static void
5411 ev_view_reload_page (EvView         *view,
5412                      gint            page,
5413                      cairo_region_t *region)
5414 {
5415         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5416                                      region,
5417                                      page,
5418                                      view->rotation,
5419                                      view->scale);
5420 }
5421
5422 void
5423 ev_view_reload (EvView *view)
5424 {
5425         ev_pixbuf_cache_clear (view->pixbuf_cache);
5426         view_update_range_and_current_page (view);
5427 }
5428
5429 /*** Zoom and sizing mode ***/
5430
5431 gboolean
5432 ev_view_can_zoom_in (EvView *view)
5433 {
5434         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
5435 }
5436
5437 gboolean
5438 ev_view_can_zoom_out (EvView *view)
5439 {
5440         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
5441 }
5442
5443 void
5444 ev_view_zoom_in (EvView *view)
5445 {
5446         gdouble scale;
5447
5448         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5449
5450         view->pending_scroll = SCROLL_TO_CENTER;
5451         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
5452         ev_document_model_set_scale (view->model, scale);
5453 }
5454
5455 void
5456 ev_view_zoom_out (EvView *view)
5457 {
5458         gdouble scale;
5459
5460         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5461
5462         view->pending_scroll = SCROLL_TO_CENTER;
5463         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5464         ev_document_model_set_scale (view->model, scale);
5465 }
5466
5467 static double
5468 zoom_for_size_fit_width (gdouble doc_width,
5469                          gdouble doc_height,
5470                          int     target_width,
5471                          int     target_height)
5472 {
5473         return (double)target_width / doc_width;
5474 }
5475
5476 static double
5477 zoom_for_size_fit_height (gdouble doc_width,
5478                           gdouble doc_height,
5479                           int     target_width,
5480                           int     target_height)
5481 {
5482         return (double)target_height / doc_height;
5483 }
5484
5485 static double
5486 zoom_for_size_best_fit (gdouble doc_width,
5487                         gdouble doc_height,
5488                         int     target_width,
5489                         int     target_height)
5490 {
5491         double w_scale;
5492         double h_scale;
5493
5494         w_scale = (double)target_width / doc_width;
5495         h_scale = (double)target_height / doc_height;
5496
5497         return MIN (w_scale, h_scale);
5498 }
5499
5500 static void
5501 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5502                                                 int     width,
5503                                                 int     height)
5504 {
5505         gdouble doc_width, doc_height;
5506         GtkBorder border;
5507         gdouble scale;
5508         gint sb_size;
5509
5510         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5511         if (view->rotation == 90 || view->rotation == 270) {
5512                 gdouble tmp;
5513
5514                 tmp = doc_width;
5515                 doc_width = doc_height;
5516                 doc_height = tmp;
5517         }
5518
5519         compute_border (view, doc_width, doc_height, &border);
5520
5521         doc_width *= 2;
5522         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5523         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5524
5525         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5526
5527         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5528                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5529         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5530                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5531         else
5532                 g_assert_not_reached ();
5533
5534         ev_document_model_set_scale (view->model, scale);
5535 }
5536
5537 static void
5538 ev_view_zoom_for_size_continuous (EvView *view,
5539                                   int     width,
5540                                   int     height)
5541 {
5542         gdouble doc_width, doc_height;
5543         GtkBorder border;
5544         gdouble scale;
5545         gint sb_size;
5546
5547         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5548         if (view->rotation == 90 || view->rotation == 270) {
5549                 gdouble tmp;
5550
5551                 tmp = doc_width;
5552                 doc_width = doc_height;
5553                 doc_height = tmp;
5554         }
5555
5556         compute_border (view, doc_width, doc_height, &border);
5557
5558         width -= (border.left + border.right + 2 * view->spacing);
5559         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5560
5561         sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5562
5563         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5564                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5565         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5566                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - sb_size, height);
5567         else
5568                 g_assert_not_reached ();
5569
5570         ev_document_model_set_scale (view->model, scale);
5571 }
5572
5573 static void
5574 ev_view_zoom_for_size_dual_page (EvView *view,
5575                                  int     width,
5576                                  int     height)
5577 {
5578         GtkBorder border;
5579         gdouble doc_width, doc_height;
5580         gdouble scale;
5581         gint other_page;
5582
5583         other_page = view->current_page ^ 1;
5584
5585         /* Find the largest of the two. */
5586         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5587         if (other_page < ev_document_get_n_pages (view->document)) {
5588                 gdouble width_2, height_2;
5589
5590                 get_doc_page_size (view, other_page, &width_2, &height_2);
5591                 if (width_2 > doc_width)
5592                         doc_width = width_2;
5593                 if (height_2 > doc_height)
5594                         doc_height = height_2;
5595         }
5596         compute_border (view, width, height, &border);
5597
5598         doc_width = doc_width * 2;
5599         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5600         height -= (border.top + border.bottom + 2 * view->spacing);
5601
5602         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5603                 gint sb_size;
5604
5605                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5606                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5607         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5608                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5609         else
5610                 g_assert_not_reached ();
5611
5612         ev_document_model_set_scale (view->model, scale);
5613 }
5614
5615 static void
5616 ev_view_zoom_for_size_single_page (EvView *view,
5617                                    int     width,
5618                                    int     height)
5619 {
5620         gdouble doc_width, doc_height;
5621         GtkBorder border;
5622         gdouble scale;
5623
5624         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5625
5626         /* Get an approximate border */
5627         compute_border (view, width, height, &border);
5628
5629         width -= (border.left + border.right + 2 * view->spacing);
5630         height -= (border.top + border.bottom + 2 * view->spacing);
5631
5632         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5633                 gint sb_size;
5634
5635                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5636                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5637         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5638                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5639         else
5640                 g_assert_not_reached ();
5641
5642         ev_document_model_set_scale (view->model, scale);
5643 }
5644
5645 static void
5646 ev_view_zoom_for_size (EvView *view,
5647                        int     width,
5648                        int     height)
5649 {
5650         g_return_if_fail (EV_IS_VIEW (view));
5651         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5652                           view->sizing_mode == EV_SIZING_BEST_FIT);
5653         g_return_if_fail (width >= 0);
5654         g_return_if_fail (height >= 0);
5655
5656         if (view->document == NULL)
5657                 return;
5658
5659         if (view->continuous && view->dual_page)
5660                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5661         else if (view->continuous)
5662                 ev_view_zoom_for_size_continuous (view, width, height);
5663         else if (view->dual_page)
5664                 ev_view_zoom_for_size_dual_page (view, width, height);
5665         else
5666                 ev_view_zoom_for_size_single_page (view, width, height);
5667 }
5668
5669 /*** Find ***/
5670 static gint
5671 ev_view_find_get_n_results (EvView *view, gint page)
5672 {
5673         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5674 }
5675
5676 static EvRectangle *
5677 ev_view_find_get_result (EvView *view, gint page, gint result)
5678 {
5679         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5680 }
5681
5682 static void
5683 jump_to_find_result (EvView *view)
5684 {
5685         gint n_results;
5686         gint page = view->current_page;
5687
5688         n_results = ev_view_find_get_n_results (view, page);
5689
5690         if (n_results > 0 && view->find_result < n_results) {
5691                 EvRectangle *rect;
5692                 GdkRectangle view_rect;
5693
5694                 rect = ev_view_find_get_result (view, page, view->find_result);
5695                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5696                 ensure_rectangle_is_visible (view, &view_rect);
5697                 view->jump_to_find_result = FALSE;
5698         }
5699 }
5700
5701 /**
5702  * jump_to_find_page
5703  * @view: #EvView instance
5704  * @direction: Direction to look
5705  * @shift: Shift from current page
5706  *
5707  * Jumps to the first page that has occurences of searched word.
5708  * Uses a direction where to look and a shift from current page.
5709  *
5710  */
5711 static void
5712 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5713 {
5714         int n_pages, i;
5715
5716         n_pages = ev_document_get_n_pages (view->document);
5717
5718         for (i = 0; i < n_pages; i++) {
5719                 int page;
5720
5721                 if (direction == EV_VIEW_FIND_NEXT)
5722                         page = view->current_page + i;
5723                 else
5724                         page = view->current_page - i;
5725                 page += shift;
5726
5727                 if (page >= n_pages) {
5728                         page = page - n_pages;
5729                 } else if (page < 0)
5730                         page = page + n_pages;
5731
5732                 if (ev_view_find_get_n_results (view, page) > 0) {
5733                         ev_document_model_set_page (view->model, page);
5734                         break;
5735                 }
5736         }
5737 }
5738
5739 void
5740 ev_view_find_changed (EvView *view, GList **results, gint page)
5741 {
5742         view->find_pages = results;
5743
5744         if (view->jump_to_find_result == TRUE) {
5745                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5746                 jump_to_find_result (view);
5747         }
5748
5749         if (view->current_page == page)
5750                 gtk_widget_queue_draw (GTK_WIDGET (view));
5751 }
5752
5753 void
5754 ev_view_find_next (EvView *view)
5755 {
5756         gint n_results;
5757
5758         n_results = ev_view_find_get_n_results (view, view->current_page);
5759         view->find_result++;
5760
5761         if (view->find_result >= n_results) {
5762                 view->find_result = 0;
5763                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5764                 jump_to_find_result (view);
5765         } else {
5766                 jump_to_find_result (view);
5767                 gtk_widget_queue_draw (GTK_WIDGET (view));
5768         }
5769 }
5770
5771 void
5772 ev_view_find_previous (EvView *view)
5773 {
5774         view->find_result--;
5775
5776         if (view->find_result < 0) {
5777                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5778                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5779                 jump_to_find_result (view);
5780         } else {
5781                 jump_to_find_result (view);
5782                 gtk_widget_queue_draw (GTK_WIDGET (view));
5783         }
5784 }
5785
5786 void
5787 ev_view_find_search_changed (EvView *view)
5788 {
5789         /* search string has changed, focus on new search result */
5790         view->jump_to_find_result = TRUE;
5791         view->find_pages = NULL;
5792 }
5793
5794 void
5795 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5796 {
5797         view->highlight_find_results = value;
5798         gtk_widget_queue_draw (GTK_WIDGET (view));
5799 }
5800
5801 void
5802 ev_view_find_cancel (EvView *view)
5803 {
5804         view->find_pages = NULL;
5805 }
5806
5807 /*** Synctex ***/
5808 void
5809 ev_view_highlight_forward_search (EvView       *view,
5810                                   EvSourceLink *link)
5811 {
5812         EvMapping   *mapping;
5813         gint         page;
5814         GdkRectangle view_rect;
5815
5816         if (!ev_document_has_synctex (view->document))
5817                 return;
5818
5819         mapping = ev_document_synctex_forward_search (view->document, link);
5820         if (!mapping)
5821                 return;
5822
5823         if (view->synctex_result)
5824                 g_free (view->synctex_result);
5825         view->synctex_result = mapping;
5826
5827         page = GPOINTER_TO_INT (mapping->data);
5828         ev_document_model_set_page (view->model, page);
5829
5830         doc_rect_to_view_rect (view, page, &mapping->area, &view_rect);
5831         ensure_rectangle_is_visible (view, &view_rect);
5832         gtk_widget_queue_draw (GTK_WIDGET (view));
5833 }
5834
5835 /*** Selections ***/
5836
5837 /* compute_new_selection_rect/text calculates the area currently selected by
5838  * view_rect.  each handles a different mode;
5839  */
5840 static GList *
5841 compute_new_selection_rect (EvView       *view,
5842                             GdkPoint     *start,
5843                             GdkPoint     *stop)
5844 {
5845         GdkRectangle view_rect;
5846         int n_pages, i;
5847         GList *list = NULL;
5848
5849         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5850
5851         view_rect.x = MIN (start->x, stop->x);
5852         view_rect.y = MIN (start->y, stop->y);
5853         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5854         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5855
5856         n_pages = ev_document_get_n_pages (view->document);
5857
5858         for (i = 0; i < n_pages; i++) {
5859                 GdkRectangle page_area;
5860                 GtkBorder border;
5861
5862                 if (ev_view_get_page_extents (view, i, &page_area, &border)) {
5863                         GdkRectangle overlap;
5864
5865                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5866                                 EvViewSelection *selection;
5867
5868                                 selection = g_new0 (EvViewSelection, 1);
5869                                 selection->page = i;
5870                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5871                                                        &(selection->rect));
5872
5873                                 list = g_list_append (list, selection);
5874                         }
5875                 }
5876         }
5877
5878         return list;
5879 }
5880
5881 static gboolean
5882 gdk_rectangle_point_in (GdkRectangle *rectangle,
5883                         GdkPoint     *point)
5884 {
5885         return rectangle->x <= point->x &&
5886                 rectangle->y <= point->y &&
5887                 point->x < rectangle->x + rectangle->width &&
5888                 point->y < rectangle->y + rectangle->height;
5889 }
5890
5891 static GList *
5892 compute_new_selection_text (EvView          *view,
5893                             EvSelectionStyle style,
5894                             GdkPoint        *start,
5895                             GdkPoint        *stop)
5896 {
5897         int n_pages, i, first, last;
5898         GList *list = NULL;
5899         EvViewSelection *selection;
5900         gdouble width, height;
5901         int start_page, end_page;
5902
5903         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5904
5905         n_pages = ev_document_get_n_pages (view->document);
5906
5907         /* First figure out the range of pages the selection
5908          * affects. */
5909         first = n_pages;
5910         last = 0;
5911         if (view->continuous) {
5912                 start_page = 0;
5913                 end_page = n_pages;
5914         } else if (view->dual_page) {
5915                 start_page = view->start_page;
5916                 end_page = view->end_page + 1;
5917         } else {
5918                 start_page = view->current_page;
5919                 end_page = view->current_page + 1;
5920         }
5921
5922         for (i = start_page; i < end_page; i++) {
5923                 GdkRectangle page_area;
5924                 GtkBorder border;
5925
5926                 ev_view_get_page_extents (view, i, &page_area, &border);
5927                 if (gdk_rectangle_point_in (&page_area, start) ||
5928                     gdk_rectangle_point_in (&page_area, stop)) {
5929                         if (first == n_pages)
5930                                 first = i;
5931                         last = i;
5932                 }
5933
5934         }
5935
5936         /* Now create a list of EvViewSelection's for the affected
5937          * pages.  This could be an empty list, a list of just one
5938          * page or a number of pages.*/
5939         for (i = first; i < last + 1; i++) {
5940                 GdkRectangle page_area;
5941                 GtkBorder border;
5942                 GdkPoint *point;
5943
5944                 get_doc_page_size (view, i, &width, &height);
5945
5946                 selection = g_new0 (EvViewSelection, 1);
5947                 selection->page = i;
5948                 selection->style = style;
5949                 selection->rect.x1 = selection->rect.y1 = 0;
5950                 selection->rect.x2 = width;
5951                 selection->rect.y2 = height;
5952
5953                 ev_view_get_page_extents (view, i, &page_area, &border);
5954
5955                 if (gdk_rectangle_point_in (&page_area, start))
5956                         point = start;
5957                 else
5958                         point = stop;
5959
5960                 if (i == first)
5961                         view_point_to_doc_point (view, point, &page_area,
5962                                                  &selection->rect.x1,
5963                                                  &selection->rect.y1);
5964
5965                 /* If the selection is contained within just one page,
5966                  * make sure we don't write 'start' into both points
5967                  * in selection->rect. */
5968                 if (first == last)
5969                         point = stop;
5970
5971                 if (i == last)
5972                         view_point_to_doc_point (view, point, &page_area,
5973                                                  &selection->rect.x2,
5974                                                  &selection->rect.y2);
5975
5976                 list = g_list_append (list, selection);
5977         }
5978
5979         return list;
5980 }
5981
5982 /* This function takes the newly calculated list, and figures out which regions
5983  * have changed.  It then queues a redraw approporiately.
5984  */
5985 static void
5986 merge_selection_region (EvView *view,
5987                         GList  *new_list)
5988 {
5989         GList *old_list;
5990         GList *new_list_ptr, *old_list_ptr;
5991
5992         /* Update the selection */
5993         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5994         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5995         g_list_free (view->selection_info.selections);
5996         view->selection_info.selections = new_list;
5997         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5998         g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
5999
6000         new_list_ptr = new_list;
6001         old_list_ptr = old_list;
6002
6003         while (new_list_ptr || old_list_ptr) {
6004                 EvViewSelection *old_sel, *new_sel;
6005                 int cur_page;
6006                 cairo_region_t *region = NULL;
6007
6008                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
6009                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
6010
6011                 /* Assume that the lists are in order, and we run through them
6012                  * comparing them, one page at a time.  We come out with the
6013                  * first page we see. */
6014                 if (new_sel && old_sel) {
6015                         if (new_sel->page < old_sel->page) {
6016                                 new_list_ptr = new_list_ptr->next;
6017                                 old_sel = NULL;
6018                         } else if (new_sel->page > old_sel->page) {
6019                                 old_list_ptr = old_list_ptr->next;
6020                                 new_sel = NULL;
6021                         } else {
6022                                 new_list_ptr = new_list_ptr->next;
6023                                 old_list_ptr = old_list_ptr->next;
6024                         }
6025                 } else if (new_sel) {
6026                         new_list_ptr = new_list_ptr->next;
6027                 } else if (old_sel) {
6028                         old_list_ptr = old_list_ptr->next;
6029                 }
6030
6031                 g_assert (new_sel || old_sel);
6032
6033                 /* is the page we're looking at on the screen?*/
6034                 cur_page = new_sel ? new_sel->page : old_sel->page;
6035                 if (cur_page < view->start_page || cur_page > view->end_page)
6036                         continue;
6037
6038                 /* seed the cache with a new page.  We are going to need the new
6039                  * region too. */
6040                 if (new_sel) {
6041                         cairo_region_t *tmp_region = NULL;
6042
6043                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
6044                                                                cur_page,
6045                                                                view->scale,
6046                                                                &tmp_region);
6047
6048                         if (tmp_region && !cairo_region_is_empty (tmp_region)) {
6049                                 new_sel->covered_region = cairo_region_reference (tmp_region);
6050                         }
6051                 }
6052
6053                 /* Now we figure out what needs redrawing */
6054                 if (old_sel && new_sel) {
6055                         if (old_sel->covered_region && new_sel->covered_region) {
6056                                 /* We only want to redraw the areas that have
6057                                  * changed, so we xor the old and new regions
6058                                  * and redraw if it's different */
6059                                 region = cairo_region_copy (old_sel->covered_region);
6060 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 9, 12)
6061                                 cairo_region_xor (region, new_sel->covered_region);
6062 #else
6063                                 cairo_region_t *tbr;
6064                                 tbr = cairo_region_copy (new_sel->covered_region);
6065
6066                                 /* xor old_sel, new_sel*/
6067                                 cairo_region_subtract (tbr, region);
6068                                 cairo_region_subtract (region, new_sel->covered_region);
6069                                 cairo_region_union (region, tbr);
6070                                 cairo_region_destroy (tbr);
6071 #endif
6072
6073                                 if (cairo_region_is_empty (region)) {
6074                                         cairo_region_destroy (region);
6075                                         region = NULL;
6076                                 } else {
6077                                         gint num_rectangles = cairo_region_num_rectangles (region);
6078                                         GdkRectangle r;
6079
6080                                         /* We need to make the damage region a little bigger
6081                                          * because the edges of the old selection might change
6082                                          */
6083                                         cairo_region_get_rectangle (region, 0, &r);
6084                                         r.x -= 5;
6085                                         r.width = 5;
6086                                         cairo_region_union_rectangle (region, &r);
6087
6088                                         cairo_region_get_rectangle (region, num_rectangles - 1, &r);
6089                                         r.x += r.width;
6090                                         r.width = 5;
6091                                         cairo_region_union_rectangle (region, &r);
6092                                 }
6093                         } else if (old_sel->covered_region) {
6094                                 region = cairo_region_copy (old_sel->covered_region);
6095                         } else if (new_sel->covered_region) {
6096                                 region = cairo_region_copy (new_sel->covered_region);
6097                         }
6098                 } else if (old_sel && !new_sel) {
6099                         if (old_sel->covered_region && !cairo_region_is_empty (old_sel->covered_region)) {
6100                                 region = cairo_region_copy (old_sel->covered_region);
6101                         }
6102                 } else if (!old_sel && new_sel) {
6103                         if (new_sel->covered_region && !cairo_region_is_empty (new_sel->covered_region)) {
6104                                 region = cairo_region_copy (new_sel->covered_region);
6105                         }
6106                 } else {
6107                         g_assert_not_reached ();
6108                 }
6109
6110                 /* Redraw the damaged region! */
6111                 if (region) {
6112                         GdkRectangle page_area;
6113                         GtkBorder    border;
6114
6115                         ev_view_get_page_extents (view, cur_page, &page_area, &border);
6116                         cairo_region_translate (region,
6117                                            page_area.x + border.left - view->scroll_x,
6118                                            page_area.y + border.top - view->scroll_y);
6119                         gdk_window_invalidate_region (gtk_widget_get_window (GTK_WIDGET (view)), region, TRUE);
6120                         cairo_region_destroy (region);
6121                 }
6122         }
6123
6124         /* Free the old list, now that we're done with it. */
6125         g_list_foreach (old_list, (GFunc) selection_free, NULL);
6126         g_list_free (old_list);
6127 }
6128
6129 static void
6130 compute_selections (EvView          *view,
6131                     EvSelectionStyle style,
6132                     GdkPoint        *start,
6133                     GdkPoint        *stop)
6134 {
6135         GList *list;
6136
6137         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
6138                 list = compute_new_selection_rect (view, start, stop);
6139         else
6140                 list = compute_new_selection_text (view, style, start, stop);
6141         merge_selection_region (view, list);
6142 }
6143
6144 /* Free's the selection.  It's up to the caller to queue redraws if needed.
6145  */
6146 static void
6147 selection_free (EvViewSelection *selection)
6148 {
6149         if (selection->covered_region)
6150                 cairo_region_destroy (selection->covered_region);
6151         g_free (selection);
6152 }
6153
6154 static void
6155 clear_selection (EvView *view)
6156 {
6157         if (view->selection_info.selections) {
6158                 g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6159                 g_list_free (view->selection_info.selections);
6160                 view->selection_info.selections = NULL;
6161
6162                 g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
6163         }
6164         view->selection_info.in_selection = FALSE;
6165         if (view->pixbuf_cache)
6166                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6167 }
6168
6169 void
6170 ev_view_select_all (EvView *view)
6171 {
6172         GList *selections = NULL;
6173         int n_pages, i;
6174
6175         /* Disable selection on rotated pages for the 0.4.0 series */
6176         if (view->rotation != 0)
6177                 return;
6178
6179         clear_selection (view);
6180
6181         n_pages = ev_document_get_n_pages (view->document);
6182         for (i = 0; i < n_pages; i++) {
6183                 gdouble width, height;
6184                 EvViewSelection *selection;
6185
6186                 get_doc_page_size (view, i, &width, &height);
6187
6188                 selection = g_new0 (EvViewSelection, 1);
6189                 selection->page = i;
6190                 selection->style = EV_SELECTION_STYLE_GLYPH;
6191                 selection->rect.x1 = selection->rect.y1 = 0;
6192                 selection->rect.x2 = width;
6193                 selection->rect.y2 = height;
6194
6195                 selections = g_list_append (selections, selection);
6196         }
6197
6198         merge_selection_region (view, selections);
6199         gtk_widget_queue_draw (GTK_WIDGET (view));
6200 }
6201
6202 gboolean
6203 ev_view_get_has_selection (EvView *view)
6204 {
6205         return view->selection_info.selections != NULL;
6206 }
6207
6208 static char *
6209 get_selected_text (EvView *view)
6210 {
6211         GString *text;
6212         GList *l;
6213         gchar *normalized_text;
6214
6215         text = g_string_new (NULL);
6216
6217         ev_document_doc_mutex_lock ();
6218
6219         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6220                 EvViewSelection *selection = (EvViewSelection *)l->data;
6221                 EvPage *page;
6222                 gchar *tmp;
6223
6224                 page = ev_document_get_page (view->document, selection->page);
6225                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6226                                                       page, selection->style,
6227                                                       &(selection->rect));
6228                 g_object_unref (page);
6229                 g_string_append (text, tmp);
6230                 g_free (tmp);
6231         }
6232
6233         ev_document_doc_mutex_unlock ();
6234
6235         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6236         g_string_free (text, TRUE);
6237         return normalized_text;
6238 }
6239
6240 static void
6241 ev_view_clipboard_copy (EvView      *view,
6242                         const gchar *text)
6243 {
6244         GtkClipboard *clipboard;
6245
6246         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6247                                               GDK_SELECTION_CLIPBOARD);
6248         gtk_clipboard_set_text (clipboard, text, -1);
6249 }
6250
6251 void
6252 ev_view_copy (EvView *ev_view)
6253 {
6254         char *text;
6255
6256         if (!EV_IS_SELECTION (ev_view->document))
6257                 return;
6258
6259         text = get_selected_text (ev_view);
6260         ev_view_clipboard_copy (ev_view, text);
6261         g_free (text);
6262 }
6263
6264 static void
6265 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6266                         GtkSelectionData *selection_data,
6267                         guint             info,
6268                         gpointer          data)
6269 {
6270         EvView *ev_view = EV_VIEW (data);
6271
6272         if (ev_view->link_selected) {
6273                 gtk_selection_data_set_text (selection_data,
6274                                              ev_link_action_get_uri (ev_view->link_selected),
6275                                              -1);
6276         } else if (EV_IS_SELECTION (ev_view->document) &&
6277                    ev_view->selection_info.selections) {
6278                 gchar *text;
6279
6280                 text = get_selected_text (ev_view);
6281                 if (text) {
6282                         gtk_selection_data_set_text (selection_data, text, -1);
6283                         g_free (text);
6284                 }
6285         }
6286 }
6287
6288 static void
6289 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6290                           gpointer      data)
6291 {
6292         EvView *view = EV_VIEW (data);
6293
6294         clear_selection (view);
6295         clear_link_selected (view);
6296 }
6297
6298 static void
6299 ev_view_update_primary_selection (EvView *ev_view)
6300 {
6301         GtkClipboard *clipboard;
6302
6303         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6304                                               GDK_SELECTION_PRIMARY);
6305
6306         if (ev_view->selection_info.selections || ev_view->link_selected) {
6307                 GtkTargetList *target_list;
6308                 GtkTargetEntry *targets;
6309                 int n_targets;
6310
6311                 target_list = gtk_target_list_new (NULL, 0);
6312                 gtk_target_list_add_text_targets (target_list, 0);
6313                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6314                 gtk_target_list_unref (target_list);
6315
6316                 if (!gtk_clipboard_set_with_owner (clipboard,
6317                                                    targets, n_targets,
6318                                                    ev_view_primary_get_cb,
6319                                                    ev_view_primary_clear_cb,
6320                                                    G_OBJECT (ev_view)))
6321                         ev_view_primary_clear_cb (clipboard, ev_view);
6322
6323                 gtk_target_table_free (targets, n_targets);
6324         } else {
6325                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6326                         gtk_clipboard_clear (clipboard);
6327         }
6328 }
6329
6330 static void
6331 clear_link_selected (EvView *view)
6332 {
6333         if (view->link_selected) {
6334                 g_object_unref (view->link_selected);
6335                 view->link_selected = NULL;
6336         }
6337 }
6338
6339 void
6340 ev_view_copy_link_address (EvView       *view,
6341                            EvLinkAction *action)
6342 {
6343         clear_link_selected (view);
6344
6345         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6346
6347         view->link_selected = g_object_ref (action);
6348         ev_view_update_primary_selection (view);
6349 }
6350
6351 /*** Cursor operations ***/
6352 static void
6353 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6354 {
6355         GdkCursor *cursor = NULL;
6356         GtkWidget *widget;
6357         GdkWindow *window;
6358
6359         if (view->cursor == new_cursor) {
6360                 return;
6361         }
6362
6363         view->cursor = new_cursor;
6364
6365         window = gtk_widget_get_window (GTK_WIDGET (view));
6366         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6367         cursor = ev_view_cursor_new (gtk_widget_get_display (widget), new_cursor);
6368         gdk_window_set_cursor (window, cursor);
6369         gdk_flush ();
6370         if (cursor)
6371                 g_object_unref (cursor);
6372 }
6373
6374 void
6375 ev_view_hide_cursor (EvView *view)
6376 {
6377        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6378 }
6379
6380 void
6381 ev_view_show_cursor (EvView *view)
6382 {
6383        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6384 }
6385
6386 gboolean
6387 ev_view_next_page (EvView *view)
6388 {
6389         int page, n_pages;
6390
6391         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6392
6393         if (!view->document)
6394                 return FALSE;
6395
6396         page = ev_document_model_get_page (view->model);
6397         n_pages = ev_document_get_n_pages (view->document);
6398
6399         if (view->dual_page)
6400                 page = page + 2;
6401         else
6402                 page = page + 1;
6403
6404         if (page < n_pages) {
6405                 ev_document_model_set_page (view->model, page);
6406                 return TRUE;
6407         } else if (view->dual_page && page == n_pages) {
6408                 ev_document_model_set_page (view->model, page - 1);
6409                 return TRUE;
6410         } else {
6411                 return FALSE;
6412         }
6413 }
6414
6415 gboolean
6416 ev_view_previous_page (EvView *view)
6417 {
6418         int page;
6419
6420         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6421
6422         if (!view->document)
6423                 return FALSE;
6424
6425         page = ev_document_model_get_page (view->model);
6426
6427         if (view->dual_page)
6428                 page = page - 2;
6429         else
6430                 page = page - 1;
6431
6432         if (page >= 0) {
6433                 ev_document_model_set_page (view->model, page);
6434                 return TRUE;
6435         } else if (view->dual_page && page == -1) {
6436                 ev_document_model_set_page (view->model, 0);
6437                 return TRUE;
6438         } else {
6439                 return FALSE;
6440         }
6441 }
6442