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