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