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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, 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-document-transition.h"
  37 #include "ev-pixbuf-cache.h"
  38 #include "ev-transition-animation.h"
  39 #include "ev-view-marshal.h"
  40 #include "ev-document-annotations.h"
  41 #include "ev-annotation-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         PROP_0,
  53         PROP_CONTINUOUS,
  54         PROP_DUAL_PAGE,
  55         PROP_FULLSCREEN,
  56         PROP_PRESENTATION,
  57         PROP_SIZING_MODE,
  58         PROP_ZOOM,
  59         PROP_ROTATION,
  60         PROP_HAS_SELECTION,
  61 };
  62
  63 enum {
  64         SIGNAL_BINDING_ACTIVATED,
  65         SIGNAL_HANDLE_LINK,
  66         SIGNAL_EXTERNAL_LINK,
  67         SIGNAL_POPUP_MENU,
  68         N_SIGNALS,
  69 };
  70
  71 enum {
  72         TARGET_DND_URI,
  73         TARGET_DND_TEXT,
  74         TARGET_DND_IMAGE
  75 };
  76
  77 static guint signals[N_SIGNALS];
  78
  79 typedef enum {
  80         EV_VIEW_FIND_NEXT,
  81         EV_VIEW_FIND_PREV
  82 } EvViewFindDirection;
  83
  84 #define ZOOM_IN_FACTOR  1.2
  85 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  86
  87 #define SCROLL_TIME 150
  88
  89 /*** Scrolling ***/
  90 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  91                                                               GtkAdjustment      *hadjustment,
  92                                                               GtkAdjustment      *vadjustment);
  93 static void       view_update_range_and_current_page         (EvView             *view);
  94 static void       set_scroll_adjustment                      (EvView             *view,
  95                                                               GtkOrientation      orientation,
  96                                                               GtkAdjustment      *adjustment);
  97 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
  98                                                               guint               keyval,
  99                                                               GdkModifierType modifiers,
 100                                                               GtkScrollType       scroll,
 101                                                               gboolean            horizontal);
 102 static void       ensure_rectangle_is_visible                (EvView             *view,
 103                                                               GdkRectangle       *rect);
 104
 105 /*** Geometry computations ***/
 106 static void       compute_border                             (EvView             *view,
 107                                                               int                 width,
 108                                                               int                 height,
 109                                                               GtkBorder          *border);
 110 static void       get_page_y_offset                          (EvView             *view,
 111                                                               int                 page,
 112                                                               int                *y_offset);
 113 static gboolean   get_page_extents                           (EvView             *view,
 114                                                               gint                page,
 115                                                               GdkRectangle       *page_area,
 116                                                               GtkBorder          *border);
 117 static void       view_rect_to_doc_rect                      (EvView             *view,
 118                                                               GdkRectangle       *view_rect,
 119                                                               GdkRectangle       *page_area,
 120                                                               EvRectangle        *doc_rect);
 121 static void       doc_rect_to_view_rect                      (EvView             *view,
 122                                                               int                 page,
 123                                                               EvRectangle        *doc_rect,
 124                                                               GdkRectangle       *view_rect);
 125 static gboolean   get_dual_even_left                         (EvView             *view);
 126 static void       find_page_at_location                      (EvView             *view,
 127                                                               gdouble             x,
 128                                                               gdouble             y,
 129                                                               gint               *page,
 130                                                               gint               *x_offset,
 131                                                               gint               *y_offset);
 132 static void       doc_point_to_view_point                    (EvView             *view,
 133                                                               int                 page,
 134                                                               EvPoint            *doc_point,
 135                                                               GdkPoint           *view_point);
 136 /*** Hyperrefs ***/
 137 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 138                                                               gdouble             x,
 139                                                               gdouble             y);
 140 static char*      tip_from_link                              (EvView             *view,
 141                                                               EvLink             *link);
 142 /*** Forms ***/
 143 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 144                                                                gdouble            x,
 145                                                                gdouble            y);
 146
 147 /*** Annotations ***/
 148 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 149                                                               gdouble             x,
 150                                                               gdouble             y);
 151 static void          show_annotation_windows                 (EvView             *view,
 152                                                               gint                page);
 153 static void          hide_annotation_windows                 (EvView             *view,
 154                                                               gint                page);
 155 /*** GtkWidget implementation ***/
 156 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 157                                                               GtkRequisition     *requisition);
 158 static void       ev_view_size_request_continuous            (EvView             *view,
 159                                                               GtkRequisition     *requisition);
 160 static void       ev_view_size_request_dual_page             (EvView             *view,
 161                                                               GtkRequisition     *requisition);
 162 static void       ev_view_size_request_single_page           (EvView             *view,
 163                                                               GtkRequisition     *requisition);
 164 static void       ev_view_size_request                       (GtkWidget          *widget,
 165                                                               GtkRequisition     *requisition);
 166 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 167                                                               GtkAllocation      *allocation);
 168 static void       ev_view_realize                            (GtkWidget          *widget);
 169 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 170                                                               GdkEventScroll     *event);
 171 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 172                                                               GdkEventExpose     *event);
 173 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 174 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 175                                                               GdkEventButton     *event);
 176 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 177                                                               GdkEventMotion     *event);
 178 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 179                                                               GdkEventButton     *event);
 180 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 181                                                               GdkEventCrossing   *event);
 182 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 183                                                               GdkEventCrossing   *event);
 184 static void       ev_view_style_set                          (GtkWidget          *widget,
 185                                                               GtkStyle           *old_style);
 186 static void       ev_view_remove_all                         (EvView             *view);
 187
 188 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 189
 190 /*** Drawing ***/
 191 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 192 static void       draw_rubberband                            (GtkWidget          *widget,
 193                                                               GdkWindow          *window,
 194                                                               const GdkRectangle *rect,
 195                                                               guchar              alpha);
 196 static void       highlight_find_results                     (EvView             *view,
 197                                                               int                 page);
 198 static void       draw_one_page                              (EvView             *view,
 199                                                               gint                page,
 200                                                               cairo_t            *cr,
 201                                                               GdkRectangle       *page_area,
 202                                                               GtkBorder          *border,
 203                                                               GdkRectangle       *expose_area,
 204                                                               gboolean           *page_ready);
 205 static void       draw_loading_text                          (EvView             *view,
 206                                                               GdkRectangle       *page_area,
 207                                                               GdkRectangle       *expose_area);
 208 static void       ev_view_reload_page                        (EvView             *view,
 209                                                               gint                page,
 210                                                               GdkRegion          *region);
 211
 212 /*** Callbacks ***/
 213 static void       ev_view_change_page                        (EvView             *view,
 214                                                               gint                new_page,
 215                                                               gboolean            start_transition);
 216 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 217                                                               GdkRegion          *region,
 218                                                               EvView             *view);
 219 static void       ev_view_page_changed_cb                    (EvDocumentModel    *model,
 220                                                               gint                old_page,
 221                                                               gint                new_page,
 222                                                               EvView             *view);
 223 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 224                                                               EvView             *view);
 225
 226 /*** GObject ***/
 227 static void       ev_view_finalize                           (GObject            *object);
 228 static void       ev_view_destroy                            (GtkObject          *object);
 229 static void       ev_view_set_property                       (GObject            *object,
 230                                                               guint               prop_id,
 231                                                               const GValue       *value,
 232                                                               GParamSpec         *pspec);
 233 static void       ev_view_get_property                       (GObject            *object,
 234                                                               guint               prop_id,
 235                                                               GValue             *value,
 236                                                               GParamSpec         *pspec);
 237 static void       ev_view_class_init                         (EvViewClass        *class);
 238 static void       ev_view_init                               (EvView             *view);
 239
 240 /*** Zoom and sizing ***/
 241 static double   zoom_for_size_fit_width                      (gdouble doc_width,
 242                                                               gdouble doc_height,
 243                                                               int     target_width,
 244                                                               int     target_height);
 245 static double   zoom_for_size_fit_height                     (gdouble doc_width,
 246                                                               gdouble doc_height,
 247                                                               int     target_width,
 248                                                               int     target_height);
 249 static double   zoom_for_size_best_fit                       (gdouble doc_width,
 250                                                               gdouble doc_height,
 251                                                               int     target_width,
 252                                                               int     target_height);
 253 static void     ev_view_zoom_for_size                        (EvView *view,
 254                                                               int     width,
 255                                                               int     height);
 256 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 257                                                               int     width,
 258                                                               int     height);
 259 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 260                                                                 int     width,
 261                                                                 int     height);
 262 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 263                                                                 int     width,
 264                                                                 int     height);
 265 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 266                                                                 int     width,
 267                                                                 int     height);
 268 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 269                                                                 int     width,
 270                                                                 int     height);
 271 /*** Cursors ***/
 272 static GdkCursor* ev_view_create_invisible_cursor            (void);
 273 static void       ev_view_set_cursor                         (EvView             *view,
 274                                                               EvViewCursor        new_cursor);
 275 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 276                                                               gint x,
 277                                                               gint y);
 278
 279 /*** Find ***/
 280 static gint         ev_view_find_get_n_results               (EvView             *view,
 281                                                               gint                page);
 282 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 283                                                               gint                page,
 284                                                               gint                result);
 285 static void       jump_to_find_result                        (EvView             *view);
 286 static void       jump_to_find_page                          (EvView             *view,
 287                                                               EvViewFindDirection direction,
 288                                                               gint                shift);
 289
 290 /*** Selection ***/
 291 static void       compute_selections                         (EvView             *view,
 292                                                               EvSelectionStyle    style,
 293                                                               GdkPoint           *start,
 294                                                               GdkPoint           *stop);
 295 static void       clear_selection                            (EvView             *view);
 296 static void       clear_link_selected                        (EvView             *view);
 297 static void       selection_free                             (EvViewSelection    *selection);
 298 static char*      get_selected_text                          (EvView             *ev_view);
 299 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 300                                                               GtkSelectionData   *selection_data,
 301                                                               guint               info,
 302                                                               gpointer            data);
 303 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 304                                                               gpointer            data);
 305 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 306
 307 /*** Presentation ***/
 308 static void       ev_view_presentation_transition_start      (EvView             *ev_view);
 309 static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
 310
 311
 312 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 313
 314 /* HeightToPage cache */
 315 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 316
 317 static void
 318 build_height_to_page (EvHeightToPageCache *cache,
 319                       EvDocument          *document,
 320                       gint                 rotation)
 321 {
 322         gboolean swap, uniform, dual_even_left;
 323         int i;
 324         double uniform_height, page_height, next_page_height;
 325         double saved_height;
 326         gdouble u_width, u_height;
 327         gint n_pages;
 328
 329         swap = (rotation == 90 || rotation == 270);
 330
 331         uniform = ev_document_is_page_size_uniform (document);
 332         n_pages = ev_document_get_n_pages (document);
 333         dual_even_left = (n_pages > 2);
 334
 335         g_free (cache->height_to_page);
 336         g_free (cache->dual_height_to_page);
 337
 338         cache->rotation = rotation;
 339         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 340         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 341
 342         if (uniform)
 343                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 344
 345         saved_height = 0;
 346         for (i = 0; i <= n_pages; i++) {
 347                 if (uniform) {
 348                         uniform_height = swap ? u_width : u_height;
 349                         cache->height_to_page[i] = i * uniform_height;
 350                 } else {
 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                         cache->height_to_page[i] = saved_height;
 360                         saved_height += page_height;
 361                 }
 362         }
 363
 364         if (dual_even_left && !uniform) {
 365                 gdouble w, h;
 366
 367                 ev_document_get_page_size (document, 0, &w, &h);
 368                 saved_height = swap ? w : h;
 369         } else {
 370                 saved_height = 0;
 371         }
 372
 373         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 374                 if (uniform) {
 375                         uniform_height = swap ? u_width : u_height;
 376                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 377                         if (i + 1 < n_pages + 2)
 378                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 379                 } else {
 380                         if (i + 1 < n_pages) {
 381                                 gdouble w, h;
 382
 383                                 ev_document_get_page_size (document, i + 1, &w, &h);
 384                                 next_page_height = swap ? w : h;
 385                         } else {
 386                                 next_page_height = 0;
 387                         }
 388
 389                         if (i < n_pages) {
 390                                 gdouble w, h;
 391
 392                                 ev_document_get_page_size (document, i, &w, &h);
 393                                 page_height = swap ? w : h;
 394                         } else {
 395                                 page_height = 0;
 396                         }
 397
 398                         if (i + 1 < n_pages + 2) {
 399                                 cache->dual_height_to_page[i] = saved_height;
 400                                 cache->dual_height_to_page[i + 1] = saved_height;
 401                                 saved_height += MAX(page_height, next_page_height);
 402                         } else {
 403                                 cache->dual_height_to_page[i] = saved_height;
 404                         }
 405                 }
 406         }
 407 }
 408
 409 static void
 410 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 411                                     EvDocument          *document,
 412                                     gint                 page,
 413                                     gint                 rotation,
 414                                     gdouble             *height,
 415                                     gdouble             *dual_height)
 416 {
 417         if (cache->rotation != rotation)
 418                 build_height_to_page (cache, document, rotation);
 419
 420         *height = cache->height_to_page[page];
 421         *dual_height = cache->dual_height_to_page[page];
 422 }
 423
 424 static void
 425 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 426 {
 427         if (cache->height_to_page) {
 428                 g_free (cache->height_to_page);
 429                 cache->height_to_page = NULL;
 430         }
 431
 432         if (cache->dual_height_to_page) {
 433                 g_free (cache->dual_height_to_page);
 434                 cache->dual_height_to_page = NULL;
 435         }
 436         g_free (cache);
 437 }
 438
 439 static EvHeightToPageCache *
 440 ev_view_get_height_to_page_cache (EvView *view)
 441 {
 442         EvHeightToPageCache *cache;
 443
 444         if (!view->document)
 445                 return NULL;
 446
 447         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 448         if (!cache) {
 449                 cache = g_new0 (EvHeightToPageCache, 1);
 450                 build_height_to_page (cache, view->document, view->rotation);
 451                 g_object_set_data_full (G_OBJECT (view->document),
 452                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 453                                         cache,
 454                                         (GDestroyNotify)ev_height_to_page_cache_free);
 455         }
 456
 457         return cache;
 458 }
 459
 460 static void
 461 ev_view_get_height_to_page (EvView *view,
 462                             gint    page,
 463                             gint   *height,
 464                             gint   *dual_height)
 465 {
 466         gdouble h, dh;
 467
 468         if (!view->height_to_page_cache)
 469                 return;
 470
 471         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 472                                             view->document,
 473                                             page,
 474                                             view->rotation,
 475                                             &h, &dh);
 476         if (height)
 477                 *height = (gint)(h * view->scale + 0.5);
 478
 479         if (dual_height)
 480                 *dual_height = (gint)(dh * view->scale + 0.5);
 481 }
 482
 483 static void
 484 scroll_to_point (EvView        *view,
 485                  gdouble        x,
 486                  gdouble        y,
 487                  GtkOrientation orientation)
 488 {
 489         if (orientation == GTK_ORIENTATION_VERTICAL) {
 490                 if (view->continuous) {
 491                         gtk_adjustment_clamp_page (view->vadjustment,
 492                                                    y - view->spacing / 2,
 493                                                    y + view->vadjustment->page_size);
 494                 } else {
 495                         gtk_adjustment_set_value (view->vadjustment,
 496                                                   CLAMP (y,
 497                                                   view->vadjustment->lower,
 498                                                   view->vadjustment->upper -
 499                                                   view->vadjustment->page_size));
 500                 }
 501         } else {
 502                 if (view->dual_page) {
 503                         gtk_adjustment_clamp_page (view->hadjustment, x,
 504                                                    x + view->hadjustment->page_size);
 505                 } else {
 506                         gtk_adjustment_set_value (view->hadjustment,
 507                                                   CLAMP (x,
 508                                                   view->hadjustment->lower,
 509                                                   view->hadjustment->upper -
 510                                                   view->hadjustment->page_size));
 511                 }
 512         }
 513 }
 514
 515 static void
 516 ev_view_scroll_to_page_position (EvView *view, GtkOrientation orientation)
 517 {
 518         gdouble x, y;
 519
 520         if (!view->document)
 521                 return;
 522
 523         if ((orientation == GTK_ORIENTATION_VERTICAL && view->pending_point.y == 0) ||
 524             (orientation == GTK_ORIENTATION_HORIZONTAL && view->pending_point.x == 0)) {
 525                 GdkRectangle page_area;
 526                 GtkBorder    border;
 527
 528                 get_page_extents (view, view->current_page, &page_area, &border);
 529                 x = page_area.x;
 530                 y = page_area.y;
 531         } else {
 532                 GdkPoint view_point;
 533
 534                 doc_point_to_view_point (view, view->current_page,
 535                                          &view->pending_point, &view_point);
 536                 x = view_point.x;
 537                 y = view_point.y;
 538         }
 539
 540         scroll_to_point (view, x, y, orientation);
 541 }
 542
 543 static void
 544 view_set_adjustment_values (EvView         *view,
 545                             GtkOrientation  orientation)
 546 {
 547         GtkWidget *widget = GTK_WIDGET (view);
 548         GtkAdjustment *adjustment;
 549         int requisition;
 550         int allocation;
 551
 552         double factor;
 553         gint new_value;
 554
 555         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 556                 requisition = widget->requisition.width;
 557                 allocation = widget->allocation.width;
 558                 adjustment = view->hadjustment;
 559         } else {
 560                 requisition = widget->requisition.height;
 561                 allocation = widget->allocation.height;
 562                 adjustment = view->vadjustment;
 563         }
 564
 565         if (!adjustment)
 566                 return;
 567
 568         factor = 1.0;
 569         switch (view->pending_scroll) {
 570                 case SCROLL_TO_KEEP_POSITION:
 571                 case SCROLL_TO_FIND_LOCATION:
 572                         factor = (adjustment->value) / adjustment->upper;
 573                         break;
 574                 case SCROLL_TO_PAGE_POSITION:
 575                         break;
 576                 case SCROLL_TO_CENTER:
 577                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 578                         break;
 579         }
 580
 581         adjustment->page_size = allocation;
 582         adjustment->step_increment = allocation * 0.1;
 583         adjustment->page_increment = allocation * 0.9;
 584         adjustment->lower = 0;
 585         adjustment->upper = MAX (allocation, requisition);
 586
 587         /*
 588          * We add 0.5 to the values before to average out our rounding errors.
 589          */
 590         switch (view->pending_scroll) {
 591                 case SCROLL_TO_KEEP_POSITION:
 592                 case SCROLL_TO_FIND_LOCATION:
 593                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 594                         gtk_adjustment_set_value (adjustment, (int)new_value);
 595                         break;
 596                 case SCROLL_TO_PAGE_POSITION:
 597                         ev_view_scroll_to_page_position (view, orientation);
 598                         break;
 599                 case SCROLL_TO_CENTER:
 600                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 601                                            0, adjustment->upper - adjustment->page_size);
 602                         gtk_adjustment_set_value (adjustment, (int)new_value);
 603                         break;
 604         }
 605
 606         gtk_adjustment_changed (adjustment);
 607 }
 608
 609 static void
 610 view_update_range_and_current_page (EvView *view)
 611 {
 612         gint start = view->start_page;
 613         gint end = view->end_page;
 614
 615         /* Presentation trumps all other modes */
 616         if (view->presentation) {
 617                 view->start_page = view->current_page;
 618                 view->end_page = view->current_page;
 619         } else if (view->continuous) {
 620                 GdkRectangle current_area, unused, page_area;
 621                 GtkBorder border;
 622                 gboolean found = FALSE;
 623                 gint area_max = -1, area;
 624                 gint best_current_page = -1;
 625                 int i;
 626
 627                 if (!(view->vadjustment && view->hadjustment))
 628                         return;
 629
 630                 current_area.x = view->hadjustment->value;
 631                 current_area.width = view->hadjustment->upper;
 632                 current_area.y = view->vadjustment->value;
 633                 current_area.height = view->vadjustment->page_size;
 634
 635                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 636
 637                         get_page_extents (view, i, &page_area, &border);
 638
 639                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 640                                 area = unused.width * unused.height;
 641
 642                                 if (!found) {
 643                                         area_max = area;
 644                                         view->start_page = i;
 645                                         found = TRUE;
 646                                         best_current_page = i;
 647                                 }
 648                                 if (area > area_max) {
 649                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 650                                         area_max = area;
 651                                 }
 652
 653                                 view->end_page = i;
 654                         } else if (found && view->current_page <= view->end_page) {
 655                                 break;
 656                         }
 657                 }
 658
 659                 if (view->pending_scroll == SCROLL_TO_KEEP_POSITION) {
 660                         best_current_page = MAX (best_current_page, view->start_page);
 661
 662                         if (view->current_page != best_current_page) {
 663                                 view->current_page = best_current_page;
 664                                 ev_document_model_set_page (view->model, best_current_page);
 665                         }
 666                 }
 667         } else if (view->dual_page) {
 668                 if (view->current_page % 2 == get_dual_even_left (view)) {
 669                         view->start_page = view->current_page;
 670                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 671                                 view->end_page = view->start_page + 1;
 672                         else
 673                                 view->end_page = view->start_page;
 674                 } else {
 675                         if (view->current_page < 1)
 676                                 view->start_page = view->current_page;
 677                         else
 678                                 view->start_page = view->current_page - 1;
 679                         view->end_page = view->current_page;
 680                 }
 681         } else {
 682                 view->start_page = view->current_page;
 683                 view->end_page = view->current_page;
 684         }
 685
 686         if (start != view->start_page || end != view->end_page) {
 687                 gint i;
 688
 689                 for (i = start; i < view->start_page; i++) {
 690                         hide_annotation_windows (view, i);
 691                 }
 692
 693                 for (i = end; i > view->end_page; i--) {
 694                         hide_annotation_windows (view, i);
 695                 }
 696         }
 697
 698         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 699                                         view->start_page,
 700                                         view->end_page,
 701                                         view->rotation,
 702                                         view->scale,
 703                                         view->selection_info.selections);
 704
 705         if (ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page))
 706             gtk_widget_queue_draw (GTK_WIDGET (view));
 707 }
 708
 709 static void
 710 set_scroll_adjustment (EvView *view,
 711                        GtkOrientation  orientation,
 712                        GtkAdjustment  *adjustment)
 713 {
 714         GtkAdjustment **to_set;
 715
 716         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 717                 to_set = &view->hadjustment;
 718         else
 719                 to_set = &view->vadjustment;
 720
 721         if (*to_set != adjustment) {
 722                 if (*to_set) {
 723                         g_signal_handlers_disconnect_by_func (*to_set,
 724                                                               (gpointer) on_adjustment_value_changed,
 725                                                               view);
 726                         g_object_unref (*to_set);
 727                 }
 728
 729                 *to_set = adjustment;
 730                 view_set_adjustment_values (view, orientation);
 731
 732                 if (*to_set) {
 733                         g_object_ref (*to_set);
 734                         g_signal_connect (*to_set, "value_changed",
 735                                           G_CALLBACK (on_adjustment_value_changed), view);
 736                 }
 737         }
 738 }
 739
 740 static void
 741 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 742                                 GtkAdjustment  *hadjustment,
 743                                 GtkAdjustment  *vadjustment)
 744 {
 745         EvView *view = EV_VIEW (layout);
 746
 747         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 748         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 749
 750         on_adjustment_value_changed (NULL, view);
 751 }
 752
 753 static void
 754 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 755                            guint           keyval,
 756                            GdkModifierType modifiers,
 757                            GtkScrollType   scroll,
 758                            gboolean        horizontal)
 759 {
 760   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 761
 762   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 763                                 "binding_activated", 2,
 764                                 GTK_TYPE_SCROLL_TYPE, scroll,
 765                                 G_TYPE_BOOLEAN, horizontal);
 766   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 767                                 "binding_activated", 2,
 768                                 GTK_TYPE_SCROLL_TYPE, scroll,
 769                                 G_TYPE_BOOLEAN, horizontal);
 770 }
 771
 772 static gdouble
 773 compute_scroll_increment (EvView        *view,
 774                           GtkScrollType  scroll)
 775 {
 776         GtkWidget *widget = GTK_WIDGET (view);
 777         GtkAdjustment *adjustment = view->vadjustment;
 778         GdkRegion *text_region, *region;
 779         gint page;
 780         GdkRectangle rect;
 781         EvRectangle doc_rect;
 782         GdkRectangle page_area;
 783         GtkBorder border;
 784         GdkRectangle *recs;
 785         gint n_recs;
 786         gdouble fraction = 1.0;
 787
 788         if (scroll != GTK_SCROLL_PAGE_BACKWARD && scroll != GTK_SCROLL_PAGE_FORWARD)
 789                 return adjustment->page_size;
 790
 791         page = scroll == GTK_SCROLL_PAGE_BACKWARD ? view->start_page : view->end_page;
 792
 793         text_region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
 794         if (!text_region || gdk_region_empty (text_region))
 795                 return adjustment->page_size;
 796
 797         get_page_extents (view, page, &page_area, &border);
 798         rect.x = page_area.x + view->scroll_x;
 799         rect.y = view->scroll_y + (scroll == GTK_SCROLL_PAGE_BACKWARD ? 5 : widget->allocation.height - 5);
 800         rect.width = page_area.width;
 801         rect.height = 1;
 802         view_rect_to_doc_rect (view, &rect, &page_area, &doc_rect);
 803
 804         /* Convert the doc rectangle into a GdkRectangle */
 805         rect.x = doc_rect.x1;
 806         rect.y = doc_rect.y1;
 807         rect.width = doc_rect.x2 - doc_rect.x1;
 808         rect.height = MAX (1, doc_rect.y2 - doc_rect.y1);
 809         region = gdk_region_rectangle (&rect);
 810
 811         gdk_region_intersect (region, text_region);
 812         gdk_region_get_rectangles (region, &recs, &n_recs);
 813         gdk_region_destroy (region);
 814         if (n_recs > 0) {
 815                 EvRenderContext *rc;
 816                 EvPage  *ev_page;
 817
 818                 ev_page = ev_document_get_page (view->document, page);
 819                 rc = ev_render_context_new (ev_page, view->rotation, view->scale);
 820                 g_object_unref (ev_page);
 821                 /* Get the selection region to know the height of the line */
 822                 doc_rect.x1 = doc_rect.x2 = recs[0].x + 0.5;
 823                 doc_rect.y1 = doc_rect.y2 = recs[0].y + 0.5;
 824
 825                 ev_document_doc_mutex_lock ();
 826                 region = ev_selection_get_selection_region (EV_SELECTION (view->document),
 827                                                             rc, EV_SELECTION_STYLE_LINE,
 828                                                             &doc_rect);
 829                 ev_document_doc_mutex_unlock ();
 830
 831                 g_object_unref (rc);
 832                 g_free (recs);
 833                 gdk_region_get_rectangles (region, &recs, &n_recs);
 834                 gdk_region_destroy (region);
 835                 if (n_recs > 0) {
 836                         fraction = 1 - (recs[0].height / adjustment->page_size);
 837                 }
 838                 g_free (recs);
 839         }
 840
 841         return adjustment->page_size * fraction;
 842
 843 }
 844
 845 void
 846 ev_view_scroll (EvView        *view,
 847                 GtkScrollType  scroll,
 848                 gboolean       horizontal)
 849 {
 850         GtkAdjustment *adjustment;
 851         double value, increment;
 852         gboolean first_page = FALSE;
 853         gboolean last_page = FALSE;
 854
 855         view->jump_to_find_result = FALSE;
 856
 857         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 858                 switch (scroll) {
 859                         case GTK_SCROLL_PAGE_BACKWARD:
 860                         case GTK_SCROLL_STEP_BACKWARD:
 861                                 ev_view_previous_page (view);
 862                                 break;
 863                         case GTK_SCROLL_PAGE_FORWARD:
 864                         case GTK_SCROLL_STEP_FORWARD:
 865                                 ev_view_next_page (view);
 866                                 break;
 867                         default:
 868                                 break;
 869                 }
 870                 return;
 871         }
 872
 873         /* Assign values for increment and vertical adjustment */
 874         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 875         value = adjustment->value;
 876
 877         /* Assign boolean for first and last page */
 878         if (view->current_page == 0)
 879                 first_page = TRUE;
 880         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 881                 last_page = TRUE;
 882
 883         switch (scroll) {
 884                 case GTK_SCROLL_PAGE_BACKWARD:
 885                         /* Do not jump backwards if at the first page */
 886                         if (value == (adjustment->lower) && first_page) {
 887                                 /* Do nothing */
 888                                 /* At the top of a page, assign the upper bound limit of previous page */
 889                         } else if (value == (adjustment->lower)) {
 890                                 value = adjustment->upper - adjustment->page_size;
 891                                 ev_view_previous_page (view);
 892                                 /* Jump to the top */
 893                         } else {
 894                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_BACKWARD);
 895                                 value = MAX (value - increment, adjustment->lower);
 896                         }
 897                         break;
 898                 case GTK_SCROLL_PAGE_FORWARD:
 899                         /* Do not jump forward if at the last page */
 900                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 901                                 /* Do nothing */
 902                         /* At the bottom of a page, assign the lower bound limit of next page */
 903                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 904                                 value = 0;
 905                                 ev_view_next_page (view);
 906                         /* Jump to the bottom */
 907                         } else {
 908                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_FORWARD);
 909                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 910                         }
 911                         break;
 912                 case GTK_SCROLL_STEP_BACKWARD:
 913                         value -= adjustment->step_increment;
 914                         break;
 915                 case GTK_SCROLL_STEP_FORWARD:
 916                         value += adjustment->step_increment;
 917                         break;
 918                 case GTK_SCROLL_STEP_DOWN:
 919                         value -= adjustment->step_increment / 10;
 920                         break;
 921                 case GTK_SCROLL_STEP_UP:
 922                         value += adjustment->step_increment / 10;
 923                         break;
 924                 default:
 925                         break;
 926         }
 927
 928         value = CLAMP (value, adjustment->lower,
 929                        adjustment->upper - adjustment->page_size);
 930
 931         gtk_adjustment_set_value (adjustment, value);
 932 }
 933
 934 #define MARGIN 5
 935
 936 static void
 937 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 938 {
 939         GtkWidget *widget = GTK_WIDGET (view);
 940         GtkAdjustment *adjustment;
 941         int value;
 942
 943         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 944
 945         adjustment = view->vadjustment;
 946
 947         if (rect->y < adjustment->value) {
 948                 value = MAX (adjustment->lower, rect->y - MARGIN);
 949                 gtk_adjustment_set_value (view->vadjustment, value);
 950         } else if (rect->y + rect->height >
 951                    adjustment->value + widget->allocation.height) {
 952                 value = MIN (adjustment->upper, rect->y + rect->height -
 953                              widget->allocation.height + MARGIN);
 954                 gtk_adjustment_set_value (view->vadjustment, value);
 955         }
 956
 957         adjustment = view->hadjustment;
 958
 959         if (rect->x < adjustment->value) {
 960                 value = MAX (adjustment->lower, rect->x - MARGIN);
 961                 gtk_adjustment_set_value (view->hadjustment, value);
 962         } else if (rect->x + rect->height >
 963                    adjustment->value + widget->allocation.width) {
 964                 value = MIN (adjustment->upper, rect->x + rect->width -
 965                              widget->allocation.width + MARGIN);
 966                 gtk_adjustment_set_value (view->hadjustment, value);
 967         }
 968
 969         gtk_widget_queue_resize (GTK_WIDGET (view));
 970 }
 971
 972 /*** Geometry computations ***/
 973
 974 static void
 975 compute_border (EvView *view, int width, int height, GtkBorder *border)
 976 {
 977         if (view->presentation) {
 978                 border->left = 0;
 979                 border->right = 0;
 980                 border->top = 0;
 981                 border->bottom = 0;
 982         } else {
 983                 ev_document_misc_get_page_border_size (width, height, border);
 984         }
 985 }
 986
 987 void
 988 _get_page_size_for_scale_and_rotation (EvDocument *document,
 989                                        gint        page,
 990                                        gdouble     scale,
 991                                        gint        rotation,
 992                                        gint       *page_width,
 993                                        gint       *page_height)
 994 {
 995         gdouble w, h;
 996         gint    width, height;
 997
 998         ev_document_get_page_size (document, page, &w, &h);
 999
1000         width = (gint)(w * scale + 0.5);
1001         height = (gint)(h * scale + 0.5);
1002
1003         if (page_width)
1004                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
1005         if (page_height)
1006                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
1007 }
1008
1009 static void
1010 ev_view_get_page_size (EvView *view,
1011                        gint    page,
1012                        gint   *page_width,
1013                        gint   *page_height)
1014 {
1015         _get_page_size_for_scale_and_rotation (view->document,
1016                                                page,
1017                                                view->scale,
1018                                                view->rotation,
1019                                                page_width,
1020                                                page_height);
1021 }
1022
1023 static void
1024 ev_view_get_max_page_size (EvView *view,
1025                            gint   *max_width,
1026                            gint   *max_height)
1027 {
1028         double w, h;
1029         gint   width, height;
1030
1031         ev_document_get_max_page_size (view->document, &w, &h);
1032
1033         width = (gint)(w * view->scale + 0.5);
1034         height = (gint)(h * view->scale + 0.5);
1035
1036         if (max_width)
1037                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
1038         if (max_height)
1039                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
1040 }
1041
1042 static void
1043 get_page_y_offset (EvView *view, int page, int *y_offset)
1044 {
1045         int max_width, offset;
1046         GtkBorder border;
1047
1048         g_return_if_fail (y_offset != NULL);
1049
1050         ev_view_get_max_page_size (view, &max_width, NULL);
1051         compute_border (view, max_width, max_width, &border);
1052
1053         if (view->dual_page) {
1054                 ev_view_get_height_to_page (view, page, NULL, &offset);
1055                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
1056                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
1057         } else {
1058                 ev_view_get_height_to_page (view, page, &offset, NULL);
1059                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
1060         }
1061
1062         *y_offset = offset;
1063         return;
1064 }
1065
1066 static gboolean
1067 get_page_extents (EvView       *view,
1068                   gint          page,
1069                   GdkRectangle *page_area,
1070                   GtkBorder    *border)
1071 {
1072         GtkWidget *widget;
1073         int width, height;
1074
1075         widget = GTK_WIDGET (view);
1076
1077         /* Get the size of the page */
1078         ev_view_get_page_size (view, page, &width, &height);
1079         compute_border (view, width, height, border);
1080         page_area->width = width + border->left + border->right;
1081         page_area->height = height + border->top + border->bottom;
1082
1083         if (view->presentation) {
1084                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
1085                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
1086         } else if (view->continuous) {
1087                 gint max_width;
1088                 gint x, y;
1089
1090                 ev_view_get_max_page_size (view, &max_width, NULL);
1091                 max_width = max_width + border->left + border->right;
1092                 /* Get the location of the bounding box */
1093                 if (view->dual_page) {
1094                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1095                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1096                         if (page % 2 == get_dual_even_left (view))
1097                                 x = x + (max_width - width - border->left - border->right);
1098                 } else {
1099                         x = view->spacing;
1100                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
1101                 }
1102
1103                 get_page_y_offset (view, page, &y);
1104
1105                 page_area->x = x;
1106                 page_area->y = y;
1107         } else {
1108                 gint x, y;
1109                 if (view->dual_page) {
1110                         gint width_2, height_2;
1111                         gint max_width = width;
1112                         gint max_height = height;
1113                         GtkBorder overall_border;
1114                         gint other_page;
1115
1116                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1117
1118                         /* First, we get the bounding box of the two pages */
1119                         if (other_page < ev_document_get_n_pages (view->document)
1120                             && (0 <= other_page)) {
1121                                 ev_view_get_page_size (view, other_page,
1122                                                        &width_2, &height_2);
1123                                 if (width_2 > width)
1124                                         max_width = width_2;
1125                                 if (height_2 > height)
1126                                         max_height = height_2;
1127                         }
1128                         compute_border (view, max_width, max_height, &overall_border);
1129
1130                         /* Find the offsets */
1131                         x = view->spacing;
1132                         y = view->spacing;
1133
1134                         /* Adjust for being the left or right page */
1135                         if (page % 2 == get_dual_even_left (view))
1136                                 x = x + max_width - width;
1137                         else
1138                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1139
1140                         y = y + (max_height - height)/2;
1141
1142                         /* Adjust for extra allocation */
1143                         x = x + MAX (0, widget->allocation.width -
1144                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1145                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
1146                 } else {
1147                         x = view->spacing;
1148                         y = view->spacing;
1149
1150                         /* Adjust for extra allocation */
1151                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1152                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1153                 }
1154
1155                 page_area->x = x;
1156                 page_area->y = y;
1157         }
1158
1159         return TRUE;
1160 }
1161
1162 static void
1163 get_doc_page_size (EvView  *view,
1164                    gint     page,
1165                    gdouble *width,
1166                    gdouble *height)
1167 {
1168         double w, h;
1169
1170         ev_document_get_page_size (view->document, page, &w, &h);
1171         if (view->rotation == 0 || view->rotation == 180) {
1172                 if (width) *width = w;
1173                 if (height) *height = h;
1174         } else {
1175                 if (width) *width = h;
1176                 if (height) *height = w;
1177         }
1178 }
1179
1180 static void
1181 view_point_to_doc_point (EvView *view,
1182                          GdkPoint *view_point,
1183                          GdkRectangle *page_area,
1184                          double  *doc_point_x,
1185                          double  *doc_point_y)
1186 {
1187         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1188         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1189 }
1190
1191 static void
1192 view_rect_to_doc_rect (EvView *view,
1193                        GdkRectangle *view_rect,
1194                        GdkRectangle *page_area,
1195                        EvRectangle  *doc_rect)
1196 {
1197         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1198         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1199         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1200         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1201 }
1202
1203 static void
1204 doc_point_to_view_point (EvView       *view,
1205                          int           page,
1206                          EvPoint      *doc_point,
1207                          GdkPoint     *view_point)
1208 {
1209         GdkRectangle page_area;
1210         GtkBorder border;
1211         double x, y, view_x, view_y;
1212         gdouble width, height;
1213
1214         get_doc_page_size (view, page, &width, &height);
1215
1216         if (view->rotation == 0) {
1217                 x = doc_point->x;
1218                 y = doc_point->y;
1219         } else if (view->rotation == 90) {
1220                 x = width - doc_point->y;
1221                 y = doc_point->x;
1222         } else if (view->rotation == 180) {
1223                 x = width - doc_point->x;
1224                 y = height - doc_point->y;
1225         } else if (view->rotation == 270) {
1226                 x = doc_point->y;
1227                 y = height - doc_point->x;
1228         } else {
1229                 g_assert_not_reached ();
1230         }
1231
1232         get_page_extents (view, page, &page_area, &border);
1233
1234         view_x = CLAMP (x * view->scale, 0, page_area.width);
1235         view_y = CLAMP (y * view->scale, 0, page_area.height);
1236         view_point->x = view_x + page_area.x;
1237         view_point->y = view_y + page_area.y;
1238 }
1239
1240 static void
1241 doc_rect_to_view_rect (EvView       *view,
1242                        int           page,
1243                        EvRectangle  *doc_rect,
1244                        GdkRectangle *view_rect)
1245 {
1246         GdkRectangle page_area;
1247         GtkBorder border;
1248         double x, y, w, h;
1249         gdouble width, height;
1250
1251         get_doc_page_size (view, page, &width, &height);
1252
1253         if (view->rotation == 0) {
1254                 x = doc_rect->x1;
1255                 y = doc_rect->y1;
1256                 w = doc_rect->x2 - doc_rect->x1;
1257                 h = doc_rect->y2 - doc_rect->y1;
1258         } else if (view->rotation == 90) {
1259                 x = width - doc_rect->y2;
1260                 y = doc_rect->x1;
1261                 w = doc_rect->y2 - doc_rect->y1;
1262                 h = doc_rect->x2 - doc_rect->x1;
1263         } else if (view->rotation == 180) {
1264                 x = width - doc_rect->x2;
1265                 y = height - doc_rect->y2;
1266                 w = doc_rect->x2 - doc_rect->x1;
1267                 h = doc_rect->y2 - doc_rect->y1;
1268         } else if (view->rotation == 270) {
1269                 x = doc_rect->y1;
1270                 y = height - doc_rect->x2;
1271                 w = doc_rect->y2 - doc_rect->y1;
1272                 h = doc_rect->x2 - doc_rect->x1;
1273         } else {
1274                 g_assert_not_reached ();
1275         }
1276
1277         get_page_extents (view, page, &page_area, &border);
1278
1279         view_rect->x = x * view->scale + page_area.x;
1280         view_rect->y = y * view->scale + page_area.y;
1281         view_rect->width = w * view->scale;
1282         view_rect->height = h * view->scale;
1283 }
1284
1285 static gboolean
1286 get_dual_even_left (EvView *view)
1287 {
1288         return (ev_document_get_n_pages (view->document) > 2);
1289 }
1290
1291 static void
1292 find_page_at_location (EvView  *view,
1293                        gdouble  x,
1294                        gdouble  y,
1295                        gint    *page,
1296                        gint    *x_offset,
1297                        gint    *y_offset)
1298 {
1299         int i;
1300
1301         if (view->document == NULL)
1302                 return;
1303
1304         g_assert (page);
1305         g_assert (x_offset);
1306         g_assert (y_offset);
1307
1308         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1309                 GdkRectangle page_area;
1310                 GtkBorder border;
1311
1312                 if (! get_page_extents (view, i, &page_area, &border))
1313                         continue;
1314
1315                 if ((x >= page_area.x + border.left) &&
1316                     (x < page_area.x + page_area.width - border.right) &&
1317                     (y >= page_area.y + border.top) &&
1318                     (y < page_area.y + page_area.height - border.bottom)) {
1319                         *page = i;
1320                         *x_offset = x - (page_area.x + border.left);
1321                         *y_offset = y - (page_area.y + border.top);
1322                         return;
1323                 }
1324         }
1325
1326         *page = -1;
1327 }
1328
1329 static gboolean
1330 location_in_text (EvView  *view,
1331                   gdouble  x,
1332                   gdouble  y)
1333 {
1334         GdkRegion *region;
1335         gint page = -1;
1336         gint x_offset = 0, y_offset = 0;
1337
1338         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1339
1340         if (page == -1)
1341                 return FALSE;
1342
1343         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1344
1345         if (region)
1346                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1347         else
1348                 return FALSE;
1349 }
1350
1351 static int
1352 ev_view_get_width (EvView *view)
1353 {
1354         return GTK_WIDGET (view)->allocation.width;
1355 }
1356
1357 static int
1358 ev_view_get_height (EvView *view)
1359 {
1360         return GTK_WIDGET (view)->allocation.height;
1361 }
1362
1363 static gboolean
1364 location_in_selected_text (EvView  *view,
1365                            gdouble  x,
1366                            gdouble  y)
1367 {
1368         gint page = -1;
1369         gint x_offset = 0, y_offset = 0;
1370         EvViewSelection *selection;
1371         GList *l = NULL;
1372
1373         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1374                 selection = (EvViewSelection *)l->data;
1375
1376                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1377
1378                 if (page != selection->page)
1379                         continue;
1380
1381                 if (selection->covered_region &&
1382                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1383                         return TRUE;
1384         }
1385
1386         return FALSE;
1387 }
1388
1389 static gboolean
1390 get_doc_point_from_offset (EvView *view,
1391                            gint    page,
1392                            gint    x_offset,
1393                            gint    y_offset,
1394                            gint   *x_new,
1395                            gint   *y_new)
1396 {
1397         gdouble width, height;
1398         double x, y;
1399
1400         get_doc_page_size (view, page, &width, &height);
1401
1402         x_offset = x_offset / view->scale;
1403         y_offset = y_offset / view->scale;
1404
1405         if (view->rotation == 0) {
1406                 x = x_offset;
1407                 y = y_offset;
1408         } else if (view->rotation == 90) {
1409                 x = y_offset;
1410                 y = width - x_offset;
1411         } else if (view->rotation == 180) {
1412                 x = width - x_offset;
1413                 y = height - y_offset;
1414         } else if (view->rotation == 270) {
1415                 x = height - y_offset;
1416                 y = x_offset;
1417         } else {
1418                 g_assert_not_reached ();
1419         }
1420
1421         *x_new = x;
1422         *y_new = y;
1423
1424         return TRUE;
1425 }
1426
1427 static gboolean
1428 get_doc_point_from_location (EvView  *view,
1429                              gdouble  x,
1430                              gdouble  y,
1431                              gint    *page,
1432                              gint    *x_new,
1433                              gint    *y_new)
1434 {
1435         gint x_offset = 0, y_offset = 0;
1436
1437         x += view->scroll_x;
1438         y += view->scroll_y;
1439         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1440         if (*page == -1)
1441                 return FALSE;
1442
1443         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1444 }
1445
1446 static void
1447 ev_view_get_area_from_mapping (EvView       *view,
1448                                guint         page,
1449                                GList        *mapping_list,
1450                                gconstpointer data,
1451                                GdkRectangle *area)
1452 {
1453         EvMapping *mapping;
1454
1455         mapping = ev_mapping_list_find (mapping_list, data);
1456         doc_rect_to_view_rect (view, page, &mapping->area, area);
1457         area->x -= view->scroll_x;
1458         area->y -= view->scroll_y;
1459 }
1460
1461
1462 /*** Hyperref ***/
1463 static EvLink *
1464 ev_view_get_link_at_location (EvView  *view,
1465                               gdouble  x,
1466                               gdouble  y)
1467 {
1468         gint page = -1;
1469         gint x_new = 0, y_new = 0;
1470         GList *link_mapping;
1471
1472         if (!EV_IS_DOCUMENT_LINKS (view->document))
1473                 return NULL;
1474
1475         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1476                 return NULL;
1477
1478         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1479
1480         if (link_mapping)
1481                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1482         else
1483                 return NULL;
1484 }
1485
1486 static void
1487 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1488 {
1489         EvPoint doc_point;
1490         gdouble zoom, left, top;
1491         gboolean change_left, change_top;
1492
1493         left = ev_link_dest_get_left (dest, &change_left);
1494         top = ev_link_dest_get_top (dest, &change_top);
1495
1496         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1497                                        ev_link_dest_get_bottom (dest) - top,
1498                                        ev_view_get_width (view),
1499                                        ev_view_get_height (view));
1500
1501         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1502         ev_document_model_set_scale (view->model, zoom);
1503
1504         doc_point.x = change_left ? left : 0;
1505         doc_point.y = change_top ? top : 0;
1506         view->pending_point = doc_point;
1507
1508         ev_view_change_page (view, ev_link_dest_get_page (dest), TRUE);
1509 }
1510
1511 static void
1512 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1513 {
1514         EvPoint doc_point;
1515         gdouble doc_width, doc_height;
1516         gint page;
1517         double zoom, left;
1518         gboolean change_left;
1519
1520         page = ev_link_dest_get_page (dest);
1521         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1522
1523         left = ev_link_dest_get_left (dest, &change_left);
1524         doc_point.x = change_left ? left : 0;
1525         doc_point.y = 0;
1526
1527         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1528                                          ev_view_get_width (view),
1529                                          ev_view_get_height (view));
1530
1531         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1532         ev_document_model_set_scale (view->model, zoom);
1533
1534         view->pending_point = doc_point;
1535
1536         ev_view_change_page (view, page, TRUE);
1537 }
1538
1539 static void
1540 goto_fith_dest (EvView *view, EvLinkDest *dest)
1541 {
1542         EvPoint doc_point;
1543         gdouble doc_width, doc_height;
1544         gint page;
1545         gdouble zoom, top;
1546         gboolean change_top;
1547
1548         page = ev_link_dest_get_page (dest);
1549         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1550
1551         top = ev_link_dest_get_top (dest, &change_top);
1552
1553         doc_point.x = 0;
1554         doc_point.y = change_top ? top : 0;
1555
1556         zoom = zoom_for_size_fit_width (doc_width, top,
1557                                         ev_view_get_width (view),
1558                                         ev_view_get_height (view));
1559
1560         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1561         ev_document_model_set_scale (view->model, zoom);
1562
1563         view->pending_point = doc_point;
1564
1565         ev_view_change_page (view, page, TRUE);
1566 }
1567
1568 static void
1569 goto_fit_dest (EvView *view, EvLinkDest *dest)
1570 {
1571         double zoom;
1572         gdouble doc_width, doc_height;
1573         int page;
1574
1575         page = ev_link_dest_get_page (dest);
1576         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1577
1578         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1579                                        ev_view_get_width (view),
1580                                        ev_view_get_height (view));
1581
1582         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1583         ev_document_model_set_scale (view->model, zoom);
1584
1585         ev_view_change_page (view, page, TRUE);
1586 }
1587
1588 static void
1589 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1590 {
1591         EvPoint doc_point;
1592         gint page;
1593         gdouble zoom, left, top;
1594         gboolean change_zoom, change_left, change_top;
1595
1596         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1597         page = ev_link_dest_get_page (dest);
1598
1599         if (change_zoom && zoom > 1) {
1600                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1601                 ev_document_model_set_scale (view->model, zoom);
1602         }
1603
1604         left = ev_link_dest_get_left (dest, &change_left);
1605         top = ev_link_dest_get_top (dest, &change_top);
1606
1607         doc_point.x = change_left ? left : 0;
1608         doc_point.y = change_top ? top : 0;
1609         view->pending_point = doc_point;
1610
1611         ev_view_change_page (view, page, TRUE);
1612 }
1613
1614 static void
1615 goto_dest (EvView *view, EvLinkDest *dest)
1616 {
1617         EvLinkDestType type;
1618         int page, n_pages, current_page;
1619
1620         page = ev_link_dest_get_page (dest);
1621         n_pages = ev_document_get_n_pages (view->document);
1622
1623         if (page < 0 || page >= n_pages)
1624                 return;
1625
1626         current_page = view->current_page;
1627
1628         type = ev_link_dest_get_dest_type (dest);
1629
1630         switch (type) {
1631                 case EV_LINK_DEST_TYPE_PAGE:
1632                         ev_document_model_set_page (view->model, page);
1633                         break;
1634                 case EV_LINK_DEST_TYPE_FIT:
1635                         goto_fit_dest (view, dest);
1636                         break;
1637                 case EV_LINK_DEST_TYPE_FITH:
1638                         goto_fith_dest (view, dest);
1639                         break;
1640                 case EV_LINK_DEST_TYPE_FITV:
1641                         goto_fitv_dest (view, dest);
1642                         break;
1643                 case EV_LINK_DEST_TYPE_FITR:
1644                         goto_fitr_dest (view, dest);
1645                         break;
1646                 case EV_LINK_DEST_TYPE_XYZ:
1647                         goto_xyz_dest (view, dest);
1648                         break;
1649                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1650                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1651                         break;
1652                 default:
1653                         g_assert_not_reached ();
1654         }
1655
1656         if (current_page != view->current_page)
1657                 ev_document_model_set_page (view->model, view->current_page);
1658 }
1659
1660 static void
1661 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1662 {
1663         EvLinkDestType type;
1664
1665         type = ev_link_dest_get_dest_type (dest);
1666
1667         if (type == EV_LINK_DEST_TYPE_NAMED) {
1668                 EvLinkDest  *dest2;
1669                 const gchar *named_dest;
1670
1671                 named_dest = ev_link_dest_get_named_dest (dest);
1672                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1673                                                           named_dest);
1674                 if (dest2) {
1675                         goto_dest (view, dest2);
1676                         g_object_unref (dest2);
1677                 }
1678
1679                 return;
1680         }
1681
1682         goto_dest (view, dest);
1683 }
1684
1685 void
1686 ev_view_handle_link (EvView *view, EvLink *link)
1687 {
1688         EvLinkAction    *action = NULL;
1689         EvLinkActionType type;
1690
1691         action = ev_link_get_action (link);
1692         if (!action)
1693                 return;
1694
1695         type = ev_link_action_get_action_type (action);
1696
1697         switch (type) {
1698                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1699                         EvLinkDest *dest;
1700
1701                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1702
1703                         dest = ev_link_action_get_dest (action);
1704                         ev_view_goto_dest (view, dest);
1705                 }
1706                         break;
1707                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1708                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1709                 case EV_LINK_ACTION_TYPE_LAUNCH:
1710                 case EV_LINK_ACTION_TYPE_NAMED:
1711                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1712                         break;
1713         }
1714 }
1715
1716 gchar *
1717 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1718 {
1719         EvLinkDestType type;
1720         gchar *msg = NULL;
1721
1722         type = ev_link_dest_get_dest_type (dest);
1723
1724         switch (type) {
1725                 case EV_LINK_DEST_TYPE_NAMED: {
1726                         EvLinkDest  *dest2;
1727                         const gchar *named_dest;
1728
1729                         named_dest = ev_link_dest_get_named_dest (dest);
1730                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1731                                                                   named_dest);
1732                         if (dest2) {
1733                                 msg = ev_document_get_page_label (view->document,
1734                                                                   ev_link_dest_get_page (dest2));
1735                                 g_object_unref (dest2);
1736                         }
1737                 }
1738
1739                         break;
1740                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1741                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1742                 }
1743                         break;
1744                 default:
1745                         msg = ev_document_get_page_label (view->document,
1746                                                           ev_link_dest_get_page (dest));
1747         }
1748
1749         return msg;
1750 }
1751
1752 static char *
1753 tip_from_action_named (EvLinkAction *action)
1754 {
1755         const gchar *name = ev_link_action_get_name (action);
1756
1757         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1758                 return g_strdup (_("Go to first page"));
1759         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1760                 return g_strdup (_("Go to previous page"));
1761         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1762                 return g_strdup (_("Go to next page"));
1763         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1764                 return g_strdup (_("Go to last page"));
1765         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1766                 return g_strdup (_("Go to page"));
1767         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1768                 return g_strdup (_("Find"));
1769         }
1770
1771         return NULL;
1772 }
1773
1774 static char *
1775 tip_from_link (EvView *view, EvLink *link)
1776 {
1777         EvLinkAction *action;
1778         EvLinkActionType type;
1779         char *msg = NULL;
1780         char *page_label;
1781         const char *title;
1782
1783         action = ev_link_get_action (link);
1784         title = ev_link_get_title (link);
1785
1786         if (!action)
1787                 return title ? g_strdup (title) : NULL;
1788
1789         type = ev_link_action_get_action_type (action);
1790
1791         switch (type) {
1792                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1793                         page_label = ev_view_page_label_from_dest (view,
1794                                                                    ev_link_action_get_dest (action));
1795                         if (page_label) {
1796                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1797                                 g_free (page_label);
1798                         }
1799                         break;
1800                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1801                         if (title) {
1802                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1803                                                        ev_link_action_get_filename (action));
1804                         } else {
1805                                 msg = g_strdup_printf (_("Go to file “%s”"),
1806                                                        ev_link_action_get_filename (action));
1807                         }
1808                         break;
1809                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1810                         msg = g_strdup (ev_link_action_get_uri (action));
1811                         break;
1812                 case EV_LINK_ACTION_TYPE_LAUNCH:
1813                         msg = g_strdup_printf (_("Launch %s"),
1814                                                ev_link_action_get_filename (action));
1815                         break;
1816                 case EV_LINK_ACTION_TYPE_NAMED:
1817                         msg = tip_from_action_named (action);
1818                         break;
1819                 default:
1820                         if (title)
1821                                 msg = g_strdup (title);
1822                         break;
1823         }
1824
1825         return msg;
1826 }
1827
1828 static void
1829 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1830 {
1831         EvLink       *link;
1832         EvFormField  *field;
1833         EvAnnotation *annot = NULL;
1834
1835         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1836                 return;
1837
1838         if (view->drag_info.in_drag) {
1839                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1840                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1841                 return;
1842         }
1843
1844         if (view->scroll_info.autoscrolling) {
1845                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1846                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1847                 return;
1848         }
1849
1850         link = ev_view_get_link_at_location (view, x, y);
1851         if (link) {
1852                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1853         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1854                 if (field->is_read_only) {
1855                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1856                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1857                             view->cursor == EV_VIEW_CURSOR_DRAG)
1858                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1859                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1860                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1861                 } else {
1862                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1863                 }
1864         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1865                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1866         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1867                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1868         } else {
1869                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1870                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1871                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1872                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1873                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1874         }
1875
1876         if (link || annot)
1877                 g_object_set (view, "has-tooltip", TRUE, NULL);
1878 }
1879
1880 /*** Images ***/
1881 static EvImage *
1882 ev_view_get_image_at_location (EvView  *view,
1883                                gdouble  x,
1884                                gdouble  y)
1885 {
1886         gint page = -1;
1887         gint x_new = 0, y_new = 0;
1888         GList *image_mapping;
1889
1890         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1891                 return NULL;
1892
1893         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1894                 return NULL;
1895
1896         image_mapping = ev_pixbuf_cache_get_image_mapping (view->pixbuf_cache, page);
1897
1898         if (image_mapping)
1899                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1900         else
1901                 return NULL;
1902 }
1903
1904 /*** Forms ***/
1905 static EvFormField *
1906 ev_view_get_form_field_at_location (EvView  *view,
1907                                     gdouble  x,
1908                                     gdouble  y)
1909 {
1910         gint page = -1;
1911         gint x_new = 0, y_new = 0;
1912         GList *forms_mapping;
1913
1914         if (!EV_IS_DOCUMENT_FORMS (view->document))
1915                 return NULL;
1916
1917         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1918                 return NULL;
1919
1920         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, page);
1921
1922         if (forms_mapping)
1923                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1924         else
1925                 return NULL;
1926 }
1927
1928 static GdkRegion *
1929 ev_view_form_field_get_region (EvView      *view,
1930                                EvFormField *field)
1931 {
1932         GdkRectangle view_area;
1933         GList       *forms_mapping;
1934
1935         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1936                                                                 field->page->index);
1937         ev_view_get_area_from_mapping (view, field->page->index,
1938                                        forms_mapping,
1939                                        field, &view_area);
1940
1941         return gdk_region_rectangle (&view_area);
1942 }
1943
1944 static gboolean
1945 ev_view_forms_remove_widgets (EvView *view)
1946 {
1947         ev_view_remove_all (view);
1948
1949         return FALSE;
1950 }
1951
1952 static void
1953 ev_view_form_field_destroy (GtkWidget *widget,
1954                             EvView    *view)
1955 {
1956         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1957 }
1958
1959 static GtkWidget *
1960 ev_view_form_field_button_create_widget (EvView      *view,
1961                                          EvFormField *field)
1962 {
1963         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1964         GdkRegion         *field_region = NULL;
1965
1966         switch (field_button->type) {
1967                 case EV_FORM_FIELD_BUTTON_PUSH:
1968                         return NULL;
1969                 case EV_FORM_FIELD_BUTTON_CHECK:
1970                 case EV_FORM_FIELD_BUTTON_RADIO: {
1971                         gboolean  state;
1972                         GList    *forms_mapping, *l;
1973
1974                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1975                                                                                field);
1976
1977                         /* FIXME: it actually depends on NoToggleToOff flags */
1978                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1979                             state && field_button->state)
1980                                 return NULL;
1981
1982                         field_region = ev_view_form_field_get_region (view, field);
1983
1984                         /* For radio buttons and checkbox buttons that are in a set
1985                          * we need to update also the region for the current selected item
1986                          */
1987                         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1988                                                                                 field->page->index);
1989                         for (l = forms_mapping; l; l = g_list_next (l)) {
1990                                 EvFormField *button = ((EvMapping *)(l->data))->data;
1991                                 GdkRegion   *button_region;
1992
1993                                 if (button->id == field->id)
1994                                         continue;
1995
1996                                 /* FIXME: only buttons in the same group should be updated */
1997                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1998                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1999                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
2000                                         continue;
2001
2002                                 button_region = ev_view_form_field_get_region (view, button);
2003                                 gdk_region_union (field_region, button_region);
2004                                 gdk_region_destroy (button_region);
2005                         }
2006
2007                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
2008                                                                        field, !state);
2009                         field_button->state = !state;
2010                 }
2011                         break;
2012         }
2013
2014         ev_view_reload_page (view, field->page->index, field_region);
2015         gdk_region_destroy (field_region);
2016
2017         return NULL;
2018 }
2019
2020 static void
2021 ev_view_form_field_text_save (EvView    *view,
2022                               GtkWidget *widget)
2023 {
2024         EvFormField *field;
2025
2026         if (!view->document)
2027                 return;
2028
2029         field = g_object_get_data (G_OBJECT (widget), "form-field");
2030
2031         if (field->changed) {
2032                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2033                 GdkRegion       *field_region;
2034
2035                 field_region = ev_view_form_field_get_region (view, field);
2036
2037                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
2038                                                             field, field_text->text);
2039                 field->changed = FALSE;
2040                 ev_view_reload_page (view, field->page->index, field_region);
2041                 gdk_region_destroy (field_region);
2042         }
2043 }
2044
2045 static void
2046 ev_view_form_field_text_changed (GtkWidget   *widget,
2047                                  EvFormField *field)
2048 {
2049         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2050         gchar           *text = NULL;
2051
2052         if (GTK_IS_ENTRY (widget)) {
2053                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
2054         } else if (GTK_IS_TEXT_BUFFER (widget)) {
2055                 GtkTextIter start, end;
2056
2057                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
2058                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
2059                                                  &start, &end, FALSE);
2060         }
2061
2062         if (!field_text->text ||
2063             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
2064                 g_free (field_text->text);
2065                 field_text->text = text;
2066                 field->changed = TRUE;
2067         }
2068 }
2069
2070 static GtkWidget *
2071 ev_view_form_field_text_create_widget (EvView      *view,
2072                                        EvFormField *field)
2073 {
2074         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2075         GtkWidget       *text = NULL;
2076         gchar           *txt;
2077
2078         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2079                                                           field);
2080
2081         switch (field_text->type) {
2082                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2083                         /* TODO */
2084                 case EV_FORM_FIELD_TEXT_NORMAL:
2085                         text = gtk_entry_new ();
2086                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2087                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2088                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2089
2090                         if (txt) {
2091                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2092                                 g_free (txt);
2093                         }
2094
2095                         g_signal_connect (text, "changed",
2096                                           G_CALLBACK (ev_view_form_field_text_changed),
2097                                           field);
2098                         g_signal_connect_after (text, "activate",
2099                                                 G_CALLBACK (ev_view_form_field_destroy),
2100                                                 view);
2101                         break;
2102                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2103                         GtkTextBuffer *buffer;
2104
2105                         text = gtk_text_view_new ();
2106                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2107
2108                         if (txt) {
2109                                 gtk_text_buffer_set_text (buffer, txt, -1);
2110                                 g_free (txt);
2111                         }
2112
2113                         g_signal_connect (buffer, "changed",
2114                                           G_CALLBACK (ev_view_form_field_text_changed),
2115                                           field);
2116                 }
2117                         break;
2118         }
2119
2120         g_object_weak_ref (G_OBJECT (text),
2121                            (GWeakNotify)ev_view_form_field_text_save,
2122                            view);
2123
2124         return text;
2125 }
2126
2127 static void
2128 ev_view_form_field_choice_save (EvView    *view,
2129                                 GtkWidget *widget)
2130 {
2131         EvFormField *field;
2132
2133         if (!view->document)
2134                 return;
2135
2136         field = g_object_get_data (G_OBJECT (widget), "form-field");
2137
2138         if (field->changed) {
2139                 GList             *l;
2140                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2141                 GdkRegion         *field_region;
2142
2143                 field_region = ev_view_form_field_get_region (view, field);
2144
2145                 if (field_choice->is_editable) {
2146                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2147                                                                       field, field_choice->text);
2148                 } else {
2149                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2150                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2151                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2152                                                                                  field,
2153                                                                                  GPOINTER_TO_INT (l->data));
2154                         }
2155                 }
2156                 field->changed = FALSE;
2157                 ev_view_reload_page (view, field->page->index, field_region);
2158                 gdk_region_destroy (field_region);
2159         }
2160 }
2161
2162 static void
2163 ev_view_form_field_choice_changed (GtkWidget   *widget,
2164                                    EvFormField *field)
2165 {
2166         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2167
2168         if (GTK_IS_COMBO_BOX (widget)) {
2169                 gint item;
2170
2171                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2172                 if (!field_choice->selected_items ||
2173                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2174                         g_list_free (field_choice->selected_items);
2175                         field_choice->selected_items = NULL;
2176                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2177                                                                        GINT_TO_POINTER (item));
2178                         field->changed = TRUE;
2179                 }
2180
2181                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
2182                         gchar *text;
2183
2184                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
2185                         if (!field_choice->text ||
2186                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2187                                 g_free (field_choice->text);
2188                                 field_choice->text = text;
2189                                 field->changed = TRUE;
2190                         }
2191                 }
2192         } else if (GTK_IS_TREE_SELECTION (widget)) {
2193                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2194                 GtkTreeModel     *model;
2195                 GList            *items, *l;
2196
2197                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2198                 g_list_free (field_choice->selected_items);
2199                 field_choice->selected_items = NULL;
2200
2201                 for (l = items; l && l->data; l = g_list_next (l)) {
2202                         GtkTreeIter  iter;
2203                         GtkTreePath *path = (GtkTreePath *)l->data;
2204                         gint         item;
2205
2206                         gtk_tree_model_get_iter (model, &iter, path);
2207                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2208
2209                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2210                                                                        GINT_TO_POINTER (item));
2211
2212                         gtk_tree_path_free (path);
2213                 }
2214
2215                 g_list_free (items);
2216
2217                 field->changed = TRUE;
2218         }
2219 }
2220
2221 static GtkWidget *
2222 ev_view_form_field_choice_create_widget (EvView      *view,
2223                                          EvFormField *field)
2224 {
2225         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2226         GtkWidget         *choice;
2227         GtkTreeModel      *model;
2228         gint               n_items, i;
2229         gint               selected_item = 0;
2230
2231         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2232                                                                    field);
2233         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2234         for (i = 0; i < n_items; i++) {
2235                 GtkTreeIter iter;
2236                 gchar      *item;
2237
2238                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2239                                                                      field, i);
2240                 if (ev_document_forms_form_field_choice_is_item_selected (
2241                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2242                         selected_item = i;
2243                         /* FIXME: we need a get_selected_items function in poppler */
2244                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2245                                                                        GINT_TO_POINTER (i));
2246                 }
2247
2248                 if (item) {
2249                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2250                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2251                                             0, item,
2252                                             1, i,
2253                                             -1);
2254                         g_free (item);
2255                 }
2256         }
2257
2258         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2259                 GtkCellRenderer  *renderer;
2260                 GtkWidget        *tree_view;
2261                 GtkTreeSelection *selection;
2262
2263                 tree_view = gtk_tree_view_new_with_model (model);
2264                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2265
2266                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2267                 if (field_choice->multi_select) {
2268                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2269                 }
2270
2271                 /* TODO: set selected items */
2272
2273                 renderer = gtk_cell_renderer_text_new ();
2274                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2275                                                              0,
2276                                                              "choix", renderer,
2277                                                              "text", 0,
2278                                                              NULL);
2279
2280                 choice = gtk_scrolled_window_new (NULL, NULL);
2281                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2282                                                 GTK_POLICY_AUTOMATIC,
2283                                                 GTK_POLICY_AUTOMATIC);
2284                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2285                 gtk_widget_show (tree_view);
2286
2287                 g_signal_connect (selection, "changed",
2288                                   G_CALLBACK (ev_view_form_field_choice_changed),
2289                                   field);
2290                 g_signal_connect_after (selection, "changed",
2291                                         G_CALLBACK (ev_view_form_field_destroy),
2292                                         view);
2293         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2294                 gchar *text;
2295
2296                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2297                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2298                 if (text) {
2299                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2300                         g_free (text);
2301                 }
2302
2303                 g_signal_connect (choice, "changed",
2304                                   G_CALLBACK (ev_view_form_field_choice_changed),
2305                                   field);
2306                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
2307                                         G_CALLBACK (ev_view_form_field_destroy),
2308                                         view);
2309         } else { /* ComboBoxText */
2310                 GtkCellRenderer *renderer;
2311
2312                 choice = gtk_combo_box_new_with_model (model);
2313                 renderer = gtk_cell_renderer_text_new ();
2314                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2315                                             renderer, TRUE);
2316                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2317                                                 renderer,
2318                                                 "text", 0,
2319                                                 NULL);
2320                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2321                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2322
2323                 g_signal_connect (choice, "changed",
2324                                   G_CALLBACK (ev_view_form_field_choice_changed),
2325                                   field);
2326                 g_signal_connect_after (choice, "changed",
2327                                         G_CALLBACK (ev_view_form_field_destroy),
2328                                         view);
2329         }
2330
2331         g_object_unref (model);
2332
2333         g_object_weak_ref (G_OBJECT (choice),
2334                            (GWeakNotify)ev_view_form_field_choice_save,
2335                            view);
2336
2337         return choice;
2338 }
2339
2340 static void
2341 ev_view_handle_form_field (EvView      *view,
2342                            EvFormField *field,
2343                            gdouble      x,
2344                            gdouble      y)
2345 {
2346         GtkWidget   *field_widget = NULL;
2347         GList       *form_field_mapping;
2348         GdkRectangle view_area;
2349
2350         if (field->is_read_only)
2351                 return;
2352
2353         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2354                 field_widget = ev_view_form_field_button_create_widget (view, field);
2355         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2356                 field_widget = ev_view_form_field_text_create_widget (view, field);
2357         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2358                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2359         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2360                 /* TODO */
2361         }
2362
2363         /* Form field doesn't require a widget */
2364         if (!field_widget)
2365                 return;
2366
2367         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2368                                 g_object_ref (field),
2369                                 (GDestroyNotify)g_object_unref);
2370
2371         form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, field->page->index);
2372         ev_view_get_area_from_mapping (view, field->page->index,
2373                                        form_field_mapping,
2374                                        field, &view_area);
2375
2376         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2377         gtk_widget_show (field_widget);
2378         gtk_widget_grab_focus (field_widget);
2379 }
2380
2381 /* Annotations */
2382 static EvViewWindowChild *
2383 ev_view_get_window_child (EvView    *view,
2384                           GtkWidget *window)
2385 {
2386         GList *children = view->window_children;
2387
2388         while (children) {
2389                 EvViewWindowChild *child;
2390
2391                 child = (EvViewWindowChild *)children->data;
2392                 children = children->next;
2393
2394                 if (child->window == window)
2395                         return child;
2396         }
2397
2398         return NULL;
2399 }
2400
2401 static void
2402 ev_view_window_child_move (EvView            *view,
2403                            EvViewWindowChild *child,
2404                            gint               x,
2405                            gint               y)
2406 {
2407         child->x = x;
2408         child->y = y;
2409         gtk_window_move (GTK_WINDOW (child->window),
2410                          MAX (child->parent_x, x),
2411                          MAX (child->parent_y, y));
2412 }
2413
2414 static void
2415 ev_view_window_child_move_with_parent (EvView    *view,
2416                                        GtkWidget *window)
2417 {
2418         EvViewWindowChild *child;
2419         gint               root_x, root_y;
2420
2421         child = ev_view_get_window_child (view, window);
2422         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2423                                &root_x, &root_y);
2424         if (root_x != child->parent_x || root_y != child->parent_y) {
2425                 gint dest_x, dest_y;
2426
2427                 dest_x = child->x + (root_x - child->parent_x);
2428                 dest_y = child->y + (root_y - child->parent_y);
2429                 child->parent_x = root_x;
2430                 child->parent_y = root_y;
2431                 ev_view_window_child_move (view, child, dest_x, dest_y);
2432         }
2433
2434         if (child->visible && !GTK_WIDGET_VISIBLE (window))
2435                 gtk_widget_show (window);
2436 }
2437
2438 static void
2439 ev_view_window_child_put (EvView    *view,
2440                           GtkWidget *window,
2441                           guint      page,
2442                           gint       x,
2443                           gint       y,
2444                           gdouble    orig_x,
2445                           gdouble    orig_y)
2446 {
2447         EvViewWindowChild *child;
2448         gint               root_x, root_y;
2449
2450         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2451                                &root_x, &root_y);
2452
2453         child = g_new0 (EvViewWindowChild, 1);
2454         child->window = window;
2455         child->page = page;
2456         child->orig_x = orig_x;
2457         child->orig_y = orig_y;
2458         child->parent_x = root_x;
2459         child->parent_y = root_y;
2460         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2461         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2462
2463         if (child->visible)
2464                 gtk_widget_show (window);
2465         else
2466                 gtk_widget_hide (window);
2467
2468         view->window_children = g_list_append (view->window_children, child);
2469 }
2470
2471 static EvViewWindowChild *
2472 ev_view_find_window_child_for_annot (EvView       *view,
2473                                      guint         page,
2474                                      EvAnnotation *annot)
2475 {
2476         GList *children = view->window_children;
2477
2478         while (children) {
2479                 EvViewWindowChild *child;
2480                 EvAnnotation      *wannot;
2481
2482                 child = (EvViewWindowChild *)children->data;
2483                 children = children->next;
2484
2485                 if (child->page != page)
2486                         continue;
2487
2488                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2489                 if (wannot == annot || strcmp (wannot->name, annot->name) == 0)
2490                         return child;
2491         }
2492
2493         return NULL;
2494 }
2495
2496 static void
2497 ev_view_window_children_free (EvView *view)
2498 {
2499         GList *l;
2500
2501         if (!view->window_children)
2502                 return;
2503
2504         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2505                 EvViewWindowChild *child;
2506
2507                 child = (EvViewWindowChild *)l->data;
2508                 gtk_widget_destroy (GTK_WIDGET (child->window));
2509                 g_free (child);
2510         }
2511         g_list_free (view->window_children);
2512         view->window_children = NULL;
2513         view->window_child_focus = NULL;
2514 }
2515
2516 static void
2517 annotation_window_grab_focus (GtkWidget *widget,
2518                               EvView    *view)
2519 {
2520         if (view->window_child_focus)
2521                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2522         view->window_child_focus = ev_view_get_window_child (view, widget);
2523 }
2524
2525 static void
2526 annotation_window_closed (EvAnnotationWindow *window,
2527                           EvView             *view)
2528 {
2529         EvViewWindowChild *child;
2530
2531         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2532         child->visible = FALSE;
2533 }
2534
2535 static void
2536 annotation_window_moved (EvAnnotationWindow *window,
2537                          gint                x,
2538                          gint                y,
2539                          EvView             *view)
2540 {
2541         EvViewWindowChild *child;
2542         GdkRectangle       page_area;
2543         GtkBorder          border;
2544         GdkRectangle       view_rect;
2545         EvRectangle        doc_rect;
2546         gint               width, height;
2547
2548         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2549         if (child->x == x && child->y == y)
2550                 return;
2551
2552         child->moved = TRUE;
2553         child->x = x;
2554         child->y = y;
2555
2556         /* Window has been moved by the user,
2557          * we have to set a new origin in doc coords
2558          */
2559         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2560         view_rect.x = (x - child->parent_x) + view->scroll_x;
2561         view_rect.y = (y - child->parent_y) + view->scroll_y;
2562         view_rect.width = width;
2563         view_rect.height = height;
2564
2565         get_page_extents (view, child->page, &page_area, &border);
2566         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2567         child->orig_x = doc_rect.x1;
2568         child->orig_y = doc_rect.y1;
2569 }
2570
2571 static void
2572 ev_view_annotation_save (EvView       *view,
2573                          EvAnnotation *annot)
2574 {
2575         if (!view->document)
2576                 return;
2577
2578         if (!annot->changed)
2579                 return;
2580
2581         ev_document_annotations_annotation_set_contents (EV_DOCUMENT_ANNOTATIONS (view->document),
2582                                                          annot, annot->contents);
2583         annot->changed = FALSE;
2584 }
2585
2586 static void
2587 show_annotation_windows (EvView *view,
2588                          gint    page)
2589 {
2590         GList     *annots, *l;
2591         GtkWindow *parent;
2592
2593         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2594
2595         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2596
2597         for (l = annots; l && l->data; l = g_list_next (l)) {
2598                 EvAnnotation      *annot;
2599                 EvViewWindowChild *child;
2600                 GtkWidget         *window;
2601                 EvRectangle       *doc_rect;
2602                 GdkRectangle       view_rect;
2603
2604                 annot = ((EvMapping *)(l->data))->data;
2605
2606                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2607                         continue;
2608
2609                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2610                         continue;
2611
2612                 window = g_object_get_data (G_OBJECT (annot), "popup");
2613                 if (window) {
2614                         ev_view_window_child_move_with_parent (view, window);
2615                         continue;
2616                 }
2617
2618                 /* Look if we already have a popup for this annot */
2619                 child = ev_view_find_window_child_for_annot (view, page, annot);
2620                 window = child ? child->window : NULL;
2621                 if (window) {
2622                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2623                         g_object_set_data (G_OBJECT (annot), "popup", window);
2624                         ev_view_window_child_move_with_parent (view, window);
2625                 } else {
2626                         window = ev_annotation_window_new (annot, parent);
2627                         g_signal_connect (window, "grab_focus",
2628                                           G_CALLBACK (annotation_window_grab_focus),
2629                                           view);
2630                         g_signal_connect (window, "closed",
2631                                           G_CALLBACK (annotation_window_closed),
2632                                           view);
2633                         g_signal_connect (window, "moved",
2634                                           G_CALLBACK (annotation_window_moved),
2635                                           view);
2636                         g_object_set_data (G_OBJECT (annot), "popup", window);
2637
2638                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2639                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2640                         view_rect.x -= view->scroll_x;
2641                         view_rect.y -= view->scroll_y;
2642
2643                         ev_view_window_child_put (view, window, page,
2644                                                   view_rect.x, view_rect.y,
2645                                                   doc_rect->x1, doc_rect->y1);
2646
2647                         g_object_weak_ref (G_OBJECT (annot),
2648                                            (GWeakNotify)ev_view_annotation_save,
2649                                            view);
2650                 }
2651         }
2652 }
2653
2654 static void
2655 hide_annotation_windows (EvView *view,
2656                          gint    page)
2657 {
2658         GList *annots, *l;
2659
2660         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2661
2662         for (l = annots; l && l->data; l = g_list_next (l)) {
2663                 EvAnnotation *annot;
2664                 GtkWidget    *window;
2665
2666                 annot = ((EvMapping *)(l->data))->data;
2667
2668                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2669                         continue;
2670
2671                 window = g_object_get_data (G_OBJECT (annot), "popup");
2672                 if (window)
2673                         gtk_widget_hide (window);
2674         }
2675 }
2676
2677 static EvAnnotation *
2678 ev_view_get_annotation_at_location (EvView  *view,
2679                                     gdouble  x,
2680                                     gdouble  y)
2681 {
2682         gint page = -1;
2683         gint x_new = 0, y_new = 0;
2684         GList *annotations_mapping;
2685
2686         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2687                 return NULL;
2688
2689         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2690                 return NULL;
2691
2692         annotations_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2693
2694         if (annotations_mapping)
2695                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2696         else
2697                 return NULL;
2698 }
2699
2700 static void
2701 ev_view_handle_annotation (EvView       *view,
2702                            EvAnnotation *annot,
2703                            gdouble       x,
2704                            gdouble       y)
2705 {
2706         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2707                 GtkWidget *window;
2708
2709                 window = g_object_get_data (G_OBJECT (annot), "popup");
2710                 if (window) {
2711                         EvViewWindowChild *child;
2712
2713                         child = ev_view_get_window_child (view, window);
2714                         if (!child->visible) {
2715                                 child->visible = TRUE;
2716                                 ev_view_window_child_move (view, child, child->x, child->y);
2717                                 gtk_widget_show (window);
2718                         }
2719                 }
2720         }
2721 }
2722
2723 /*** GtkWidget implementation ***/
2724
2725 static void
2726 ev_view_size_request_continuous_dual_page (EvView         *view,
2727                                            GtkRequisition *requisition)
2728 {
2729         int max_width;
2730         gint n_pages;
2731         GtkBorder border;
2732
2733         ev_view_get_max_page_size (view, &max_width, NULL);
2734         compute_border (view, max_width, max_width, &border);
2735
2736         n_pages = ev_document_get_n_pages (view->document) + 1;
2737
2738         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2739         get_page_y_offset (view, n_pages, &requisition->height);
2740
2741         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2742                 requisition->width = 1;
2743         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2744                 requisition->width = 1;
2745                 /* FIXME: This could actually be set on one page docs or docs
2746                  * with a strange aspect ratio. */
2747                 /* requisition->height = 1;*/
2748         }
2749 }
2750
2751 static void
2752 ev_view_size_request_continuous (EvView         *view,
2753                                  GtkRequisition *requisition)
2754 {
2755         int max_width;
2756         int n_pages;
2757         GtkBorder border;
2758
2759         ev_view_get_max_page_size (view, &max_width, NULL);
2760         n_pages = ev_document_get_n_pages (view->document);
2761         compute_border (view, max_width, max_width, &border);
2762
2763         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2764         get_page_y_offset (view, n_pages, &requisition->height);
2765
2766         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2767                 requisition->width = 1;
2768         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2769                 requisition->width = 1;
2770                 /* FIXME: This could actually be set on one page docs or docs
2771                  * with a strange aspect ratio. */
2772                 /* requisition->height = 1;*/
2773         }
2774 }
2775
2776 static void
2777 ev_view_size_request_dual_page (EvView         *view,
2778                                 GtkRequisition *requisition)
2779 {
2780         GtkBorder border;
2781         gint width, height;
2782
2783         /* Find the largest of the two. */
2784         ev_view_get_page_size (view,
2785                                view->current_page,
2786                                &width, &height);
2787         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
2788                 gint width_2, height_2;
2789                 ev_view_get_page_size (view,
2790                                        view->current_page + 1,
2791                                        &width_2, &height_2);
2792                 if (width_2 > width) {
2793                         width = width_2;
2794                         height = height_2;
2795                 }
2796         }
2797         compute_border (view, width, height, &border);
2798
2799         requisition->width = ((width + border.left + border.right) * 2) +
2800                 (view->spacing * 3);
2801         requisition->height = (height + border.top + border.bottom) +
2802                 (view->spacing * 2);
2803
2804         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2805                 requisition->width = 1;
2806         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2807                 requisition->width = 1;
2808                 requisition->height = 1;
2809         }
2810 }
2811
2812 static void
2813 ev_view_size_request_single_page (EvView         *view,
2814                                   GtkRequisition *requisition)
2815 {
2816         GtkBorder border;
2817         gint width, height;
2818
2819         ev_view_get_page_size (view, view->current_page, &width, &height);
2820         compute_border (view, width, height, &border);
2821
2822         requisition->width = width + border.left + border.right + (2 * view->spacing);
2823         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2824
2825         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2826                 requisition->width = 1;
2827                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2828         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2829                 requisition->width = 1;
2830                 requisition->height = 1;
2831         }
2832 }
2833
2834 static void
2835 ev_view_size_request (GtkWidget      *widget,
2836                       GtkRequisition *requisition)
2837 {
2838         EvView *view = EV_VIEW (widget);
2839
2840         if (view->document == NULL) {
2841                 requisition->width = 1;
2842                 requisition->height = 1;
2843                 return;
2844         }
2845
2846         if (view->presentation) {
2847                 requisition->width = 1;
2848                 requisition->height = 1;
2849                 return;
2850         }
2851
2852         if (view->continuous && view->dual_page)
2853                 ev_view_size_request_continuous_dual_page (view, requisition);
2854         else if (view->continuous)
2855                 ev_view_size_request_continuous (view, requisition);
2856         else if (view->dual_page)
2857                 ev_view_size_request_dual_page (view, requisition);
2858         else
2859                 ev_view_size_request_single_page (view, requisition);
2860 }
2861
2862 static void
2863 ev_view_size_allocate (GtkWidget      *widget,
2864                        GtkAllocation  *allocation)
2865 {
2866         EvView *view = EV_VIEW (widget);
2867         GList  *children, *l;
2868         gint    root_x, root_y;
2869
2870         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2871
2872         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2873             view->sizing_mode == EV_SIZING_BEST_FIT) {
2874                 ev_view_zoom_for_size (view,
2875                                        allocation->width,
2876                                        allocation->height);
2877                 ev_view_size_request (widget, &widget->requisition);
2878         }
2879
2880         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2881         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2882
2883         if (view->document)
2884                 view_update_range_and_current_page (view);
2885
2886         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2887         view->pending_resize = FALSE;
2888         view->pending_point.x = 0;
2889         view->pending_point.y = 0;
2890
2891         children = gtk_container_get_children (GTK_CONTAINER (widget));
2892         for (l = children; l && l->data; l = g_list_next (l)) {
2893                 EvFormField   *field;
2894                 GdkRectangle   view_area;
2895                 GList         *form_field_mapping;
2896                 GtkAllocation  child_allocation;
2897                 GtkRequisition child_requisition;
2898                 GtkWidget     *child = (GtkWidget *)l->data;
2899
2900                 field = g_object_get_data (G_OBJECT (child), "form-field");
2901                 if (!field)
2902                         continue;
2903
2904                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2905                                                                              field->page->index);
2906                 ev_view_get_area_from_mapping (view, field->page->index,
2907                                                form_field_mapping,
2908                                                field, &view_area);
2909
2910                 gtk_widget_size_request (child, &child_requisition);
2911                 if (child_requisition.width != view_area.width ||
2912                     child_requisition.height != view_area.height)
2913                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2914
2915                 gtk_container_child_get (GTK_CONTAINER (widget),
2916                                          child,
2917                                          "x", &child_allocation.x,
2918                                          "y", &child_allocation.y,
2919                                          NULL);
2920                 if (child_allocation.x != view_area.x ||
2921                     child_allocation.y != view_area.y) {
2922                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2923                 }
2924         }
2925         g_list_free (children);
2926
2927         if (view->window_children)
2928                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2929                                        &root_x, &root_y);
2930
2931         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2932                 EvViewWindowChild *child;
2933                 EvRectangle        doc_rect;
2934                 GdkRectangle       view_rect;
2935
2936                 child = (EvViewWindowChild *)l->data;
2937
2938                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
2939                 if (child->moved) {
2940                         doc_rect.x1 = child->orig_x;
2941                         doc_rect.y1 = child->orig_y;
2942                 }
2943                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
2944                 view_rect.x -= view->scroll_x;
2945                 view_rect.y -= view->scroll_y;
2946
2947                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
2948                         child->parent_x = root_x;
2949                         child->parent_y = root_y;
2950                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
2951                 }
2952         }
2953 }
2954
2955 static void
2956 ev_view_realize (GtkWidget *widget)
2957 {
2958         EvView *view = EV_VIEW (widget);
2959
2960         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
2961                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
2962
2963         gdk_window_set_events (view->layout.bin_window,
2964                                (gdk_window_get_events (view->layout.bin_window) |
2965                                 GDK_EXPOSURE_MASK |
2966                                 GDK_BUTTON_PRESS_MASK |
2967                                 GDK_BUTTON_RELEASE_MASK |
2968                                 GDK_SCROLL_MASK |
2969                                 GDK_KEY_PRESS_MASK |
2970                                 GDK_POINTER_MOTION_MASK |
2971                                 GDK_POINTER_MOTION_HINT_MASK |
2972                                 GDK_ENTER_NOTIFY_MASK |
2973                                 GDK_LEAVE_NOTIFY_MASK));
2974
2975         if (view->presentation)
2976                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
2977         else
2978                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
2979
2980         on_adjustment_value_changed (NULL, view);
2981 }
2982
2983 static gboolean
2984 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
2985 {
2986         EvView *view = EV_VIEW (widget);
2987         guint state;
2988
2989         state = event->state & gtk_accelerator_get_default_mod_mask ();
2990
2991         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
2992                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
2993
2994                 if (event->direction == GDK_SCROLL_UP ||
2995                     event->direction == GDK_SCROLL_LEFT) {
2996                         if (ev_view_can_zoom_in (view)) {
2997                                 ev_view_zoom_in (view);
2998                         }
2999                 } else {
3000                         if (ev_view_can_zoom_out (view)) {
3001                                 ev_view_zoom_out (view);
3002                         }
3003                 }
3004
3005                 return TRUE;
3006         }
3007
3008         view->jump_to_find_result = FALSE;
3009
3010         /* Shift+Wheel scrolls the in the perpendicular direction */
3011         if (state & GDK_SHIFT_MASK) {
3012                 if (event->direction == GDK_SCROLL_UP)
3013                         event->direction = GDK_SCROLL_LEFT;
3014                 else if (event->direction == GDK_SCROLL_LEFT)
3015                         event->direction = GDK_SCROLL_UP;
3016                 else if (event->direction == GDK_SCROLL_DOWN)
3017                         event->direction = GDK_SCROLL_RIGHT;
3018                 else if (event->direction == GDK_SCROLL_RIGHT)
3019                         event->direction = GDK_SCROLL_DOWN;
3020
3021                 event->state &= ~GDK_SHIFT_MASK;
3022                 state &= ~GDK_SHIFT_MASK;
3023         }
3024
3025         if (state == 0 &&
3026             (view->presentation ||
3027              (view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous))) {
3028                 switch (event->direction) {
3029                         case GDK_SCROLL_DOWN:
3030                         case GDK_SCROLL_RIGHT:
3031                                 ev_view_next_page (view);
3032                                 break;
3033                         case GDK_SCROLL_UP:
3034                         case GDK_SCROLL_LEFT:
3035                                 ev_view_previous_page (view);
3036                                 break;
3037                 }
3038
3039                 return TRUE;
3040         }
3041
3042         return FALSE;
3043 }
3044
3045 static EvViewSelection *
3046 find_selection_for_page (EvView *view,
3047                          gint    page)
3048 {
3049         GList *list;
3050
3051         for (list = view->selection_info.selections; list != NULL; list = list->next) {
3052                 EvViewSelection *selection;
3053
3054                 selection = (EvViewSelection *) list->data;
3055
3056                 if (selection->page == page)
3057                         return selection;
3058         }
3059
3060         return NULL;
3061 }
3062
3063 static void
3064 draw_end_presentation_page (EvView       *view,
3065                             GdkRectangle *page_area)
3066 {
3067         PangoLayout *layout;
3068         PangoFontDescription *font_desc;
3069         gchar *markup;
3070         const gchar *text = _("End of presentation. Press Escape to exit.");
3071
3072         if (view->presentation_state != EV_PRESENTATION_END)
3073                 return;
3074
3075         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
3076         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
3077         pango_layout_set_markup (layout, markup, -1);
3078         g_free (markup);
3079
3080         font_desc = pango_font_description_new ();
3081         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
3082         pango_layout_set_font_description (layout, font_desc);
3083
3084         gtk_paint_layout (GTK_WIDGET (view)->style,
3085                           view->layout.bin_window,
3086                           GTK_WIDGET_STATE (view),
3087                           FALSE,
3088                           page_area,
3089                           GTK_WIDGET (view),
3090                           NULL,
3091                           page_area->x + 15,
3092                           page_area->y + 15,
3093                           layout);
3094
3095         pango_font_description_free (font_desc);
3096         g_object_unref (layout);
3097 }
3098
3099 static gboolean
3100 ev_view_expose_event (GtkWidget      *widget,
3101                       GdkEventExpose *event)
3102 {
3103         EvView  *view = EV_VIEW (widget);
3104         cairo_t *cr;
3105         gint     i;
3106
3107         if (view->animation) {
3108                 if (ev_transition_animation_ready (view->animation)) {
3109                         GdkRectangle page_area;
3110                         GtkBorder    border;
3111
3112                         if (get_page_extents (view, view->current_page, &page_area, &border)) {
3113                                 cr = gdk_cairo_create (view->layout.bin_window);
3114
3115                                 /* normalize to x=0, y=0 */
3116                                 cairo_translate (cr, page_area.x, page_area.y);
3117                                 page_area.x = page_area.y = 0;
3118
3119                                 ev_transition_animation_paint (view->animation, cr, page_area);
3120                                 cairo_destroy (cr);
3121                         }
3122                 }
3123
3124                 return TRUE;
3125         }
3126
3127         if (view->presentation) {
3128                 switch (view->presentation_state) {
3129                         case EV_PRESENTATION_END: {
3130                                 GdkRectangle area = {0};
3131
3132                                 area.width = widget->allocation.width;
3133                                 area.height = widget->allocation.height;
3134
3135                                 draw_end_presentation_page (view, &area);
3136                         }
3137                                 return FALSE;
3138                         case EV_PRESENTATION_BLACK:
3139                         case EV_PRESENTATION_WHITE:
3140                                 return FALSE;
3141                         case EV_PRESENTATION_NORMAL:
3142                         default:
3143                                 break;
3144                 }
3145         } else if (view->loading) {
3146                 GdkRectangle area = {0};
3147
3148                 area.width = widget->allocation.width;
3149                 area.height = widget->allocation.height;
3150
3151                 draw_loading_text (view,
3152                                    &area,
3153                                    &(event->area));
3154         }
3155
3156         if (view->document == NULL)
3157                 return FALSE;
3158
3159         cr = gdk_cairo_create (view->layout.bin_window);
3160
3161         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3162                 GdkRectangle page_area;
3163                 GtkBorder border;
3164                 gboolean page_ready = TRUE;
3165
3166                 if (!get_page_extents (view, i, &page_area, &border))
3167                         continue;
3168
3169                 page_area.x -= view->scroll_x;
3170                 page_area.y -= view->scroll_y;
3171
3172                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
3173
3174                 if (page_ready && view->find_pages && view->highlight_find_results)
3175                         highlight_find_results (view, i);
3176                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3177                         show_annotation_windows (view, i);
3178         }
3179
3180         cairo_destroy (cr);
3181
3182         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3183                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3184
3185         return FALSE;
3186 }
3187
3188 static gboolean
3189 ev_view_do_popup_menu (EvView *view,
3190                        gdouble x,
3191                        gdouble y)
3192 {
3193         EvLink  *link;
3194         EvImage *image;
3195
3196         image = ev_view_get_image_at_location (view, x, y);
3197         if (image) {
3198                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
3199                 return TRUE;
3200         }
3201
3202         link = ev_view_get_link_at_location (view, x, y);
3203         if (link) {
3204                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
3205                 return TRUE;
3206         }
3207
3208         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
3209
3210         return TRUE;
3211 }
3212
3213 static gboolean
3214 ev_view_popup_menu (GtkWidget *widget)
3215 {
3216         gint x, y;
3217
3218         gtk_widget_get_pointer (widget, &x, &y);
3219         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3220 }
3221
3222 static void
3223 get_link_area (EvView       *view,
3224                gint          x,
3225                gint          y,
3226                EvLink       *link,
3227                GdkRectangle *area)
3228 {
3229         GList *link_mapping;
3230         gint   page;
3231         gint   x_offset = 0, y_offset = 0;
3232
3233         x += view->scroll_x;
3234         y += view->scroll_y;
3235
3236         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3237
3238         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
3239         ev_view_get_area_from_mapping (view, page,
3240                                        link_mapping,
3241                                        link, area);
3242 }
3243
3244 static void
3245 get_annot_area (EvView       *view,
3246                gint          x,
3247                gint          y,
3248                EvAnnotation *annot,
3249                GdkRectangle *area)
3250 {
3251         GList *annots_mapping;
3252         gint   page;
3253         gint   x_offset = 0, y_offset = 0;
3254
3255         x += view->scroll_x;
3256         y += view->scroll_y;
3257
3258         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3259
3260         annots_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
3261         ev_view_get_area_from_mapping (view, page,
3262                                        annots_mapping,
3263                                        annot, area);
3264 }
3265
3266 static gboolean
3267 ev_view_query_tooltip (GtkWidget  *widget,
3268                        gint        x,
3269                        gint        y,
3270                        gboolean    keyboard_tip,
3271                        GtkTooltip *tooltip)
3272 {
3273         EvView       *view = EV_VIEW (widget);
3274         EvLink       *link;
3275         EvAnnotation *annot;
3276         gchar        *text;
3277
3278         annot = ev_view_get_annotation_at_location (view, x, y);
3279         if (annot && annot->contents) {
3280                 GdkRectangle annot_area;
3281
3282                 get_annot_area (view, x, y, annot, &annot_area);
3283                 gtk_tooltip_set_text (tooltip, annot->contents);
3284                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
3285
3286                 return TRUE;
3287         }
3288
3289         link = ev_view_get_link_at_location (view, x, y);
3290         if (!link)
3291                 return FALSE;
3292
3293         text = tip_from_link (view, link);
3294         if (text && g_utf8_validate (text, -1, NULL)) {
3295                 GdkRectangle link_area;
3296
3297                 get_link_area (view, x, y, link, &link_area);
3298                 gtk_tooltip_set_text (tooltip, text);
3299                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3300         }
3301         g_free (text);
3302
3303         return TRUE;
3304 }
3305
3306 static void
3307 start_selection_for_event (EvView         *view,
3308                            GdkEventButton *event)
3309 {
3310         clear_selection (view);
3311
3312         view->selection_info.start.x = event->x + view->scroll_x;
3313         view->selection_info.start.y = event->y + view->scroll_y;
3314
3315         switch (event->type) {
3316                 case GDK_2BUTTON_PRESS:
3317                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3318                         break;
3319                 case GDK_3BUTTON_PRESS:
3320                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3321                         break;
3322                 default:
3323                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3324                         return;
3325         }
3326
3327         /* In case of WORD or LINE, compute selections now */
3328         compute_selections (view,
3329                             view->selection_info.style,
3330                             &(view->selection_info.start),
3331                             &(view->selection_info.start));
3332 }
3333
3334 static gboolean
3335 ev_view_button_press_event (GtkWidget      *widget,
3336                             GdkEventButton *event)
3337 {
3338         EvView *view = EV_VIEW (widget);
3339
3340         if (!view->document)
3341                 return FALSE;
3342
3343         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3344                 gtk_widget_grab_focus (widget);
3345         }
3346
3347         if (view->window_child_focus) {
3348                 EvAnnotationWindow *window;
3349                 EvAnnotation       *annot;
3350
3351                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3352                 annot = ev_annotation_window_get_annotation (window);
3353                 ev_annotation_window_ungrab_focus (window);
3354                 ev_view_annotation_save (view, annot);
3355                 view->window_child_focus = NULL;
3356         }
3357
3358         view->pressed_button = event->button;
3359         view->selection_info.in_drag = FALSE;
3360
3361         if (view->scroll_info.autoscrolling)
3362                 return TRUE;
3363
3364         switch (event->button) {
3365                 case 1: {
3366                         EvImage *image;
3367                         EvAnnotation *annot;
3368                         EvFormField *field;
3369
3370                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3371                                 if (event->type == GDK_3BUTTON_PRESS) {
3372                                         start_selection_for_event (view, event);
3373                                 } else if (location_in_selected_text (view,
3374                                                                event->x + view->scroll_x,
3375                                                                event->y + view->scroll_y)) {
3376                                         view->selection_info.in_drag = TRUE;
3377                                 } else {
3378                                         start_selection_for_event (view, event);
3379                                 }
3380
3381                                 gtk_widget_queue_draw (widget);
3382                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3383                                 ev_view_handle_annotation (view, annot, event->x, event->y);
3384                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3385                                 ev_view_remove_all (view);
3386                                 ev_view_handle_form_field (view, field, event->x, event->y);
3387                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3388                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3389                                 if (view->image_dnd_info.image)
3390                                         g_object_unref (view->image_dnd_info.image);
3391                                 view->image_dnd_info.image = g_object_ref (image);
3392                                 view->image_dnd_info.in_drag = TRUE;
3393
3394                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3395                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3396                         } else {
3397                                 ev_view_remove_all (view);
3398
3399                                 if (EV_IS_SELECTION (view->document))
3400                                         start_selection_for_event (view, event);
3401                         }
3402                 }
3403                         return TRUE;
3404                 case 2:
3405                         /* use root coordinates as reference point because
3406                          * scrolling changes window relative coordinates */
3407                         view->drag_info.start.x = event->x_root;
3408                         view->drag_info.start.y = event->y_root;
3409                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3410                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3411
3412                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3413
3414                         return TRUE;
3415                 case 3:
3416                         view->scroll_info.start_y = event->y;
3417                         return ev_view_do_popup_menu (view, event->x, event->y);
3418         }
3419
3420         return FALSE;
3421 }
3422
3423 static void
3424 ev_view_remove_all (EvView *view)
3425 {
3426         GList *children, *child;
3427
3428         children = gtk_container_get_children (GTK_CONTAINER (view));
3429         for (child = children; child && child->data; child = g_list_next (child)) {
3430                 gtk_container_remove (GTK_CONTAINER (view),
3431                                       GTK_WIDGET (child->data));
3432         }
3433         g_list_free (children);
3434 }
3435
3436 /*** Drag and Drop ***/
3437 static void
3438 ev_view_drag_data_get (GtkWidget        *widget,
3439                        GdkDragContext   *context,
3440                        GtkSelectionData *selection_data,
3441                        guint             info,
3442                        guint             time)
3443 {
3444         EvView *view = EV_VIEW (widget);
3445
3446         switch (info) {
3447                 case TARGET_DND_TEXT:
3448                         if (EV_IS_SELECTION (view->document) &&
3449                             view->selection_info.selections) {
3450                                 gchar *text;
3451
3452                                 text = get_selected_text (view);
3453                                 gtk_selection_data_set_text (selection_data,
3454                                                              text,
3455                                                              strlen (text));
3456                                 g_free (text);
3457                         }
3458                         break;
3459                 case TARGET_DND_IMAGE:
3460                         if (view->image_dnd_info.image) {
3461                                 GdkPixbuf *pixbuf;
3462
3463                                 ev_document_doc_mutex_lock ();
3464                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3465                                                                        view->image_dnd_info.image);
3466                                 ev_document_doc_mutex_unlock ();
3467
3468                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3469                                 g_object_unref (pixbuf);
3470                         }
3471                         break;
3472                 case TARGET_DND_URI:
3473                         if (view->image_dnd_info.image) {
3474                                 GdkPixbuf   *pixbuf;
3475                                 const gchar *tmp_uri;
3476                                 gchar       *uris[2];
3477
3478                                 ev_document_doc_mutex_lock ();
3479                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3480                                                                        view->image_dnd_info.image);
3481                                 ev_document_doc_mutex_unlock ();
3482
3483                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3484                                 g_object_unref (pixbuf);
3485
3486                                 uris[0] = (gchar *)tmp_uri;
3487                                 uris[1] = NULL;
3488                                 gtk_selection_data_set_uris (selection_data, uris);
3489                         }
3490         }
3491 }
3492
3493 static gboolean
3494 ev_view_drag_motion (GtkWidget      *widget,
3495                      GdkDragContext *context,
3496                      gint            x,
3497                      gint            y,
3498                      guint           time)
3499 {
3500         if (gtk_drag_get_source_widget (context) == widget)
3501                 gdk_drag_status (context, 0, time);
3502         else
3503                 gdk_drag_status (context, context->suggested_action, time);
3504
3505         return TRUE;
3506 }
3507
3508 static gboolean
3509 selection_update_idle_cb (EvView *view)
3510 {
3511         compute_selections (view,
3512                             view->selection_info.style,
3513                             &view->selection_info.start,
3514                             &view->motion);
3515         view->selection_update_id = 0;
3516         return FALSE;
3517 }
3518
3519 static gboolean
3520 selection_scroll_timeout_cb (EvView *view)
3521 {
3522         gint x, y, shift = 0;
3523         GtkWidget *widget = GTK_WIDGET (view);
3524
3525         gtk_widget_get_pointer (widget, &x, &y);
3526
3527         if (y > widget->allocation.height) {
3528                 shift = (y - widget->allocation.height) / 2;
3529         } else if (y < 0) {
3530                 shift = y / 2;
3531         }
3532
3533         if (shift)
3534                 gtk_adjustment_set_value (view->vadjustment,
3535                                           CLAMP (view->vadjustment->value + shift,
3536                                           view->vadjustment->lower,
3537                                           view->vadjustment->upper -
3538                                           view->vadjustment->page_size));
3539
3540         if (x > widget->allocation.width) {
3541                 shift = (x - widget->allocation.width) / 2;
3542         } else if (x < 0) {
3543                 shift = x / 2;
3544         }
3545
3546         if (shift)
3547                 gtk_adjustment_set_value (view->hadjustment,
3548                                           CLAMP (view->hadjustment->value + shift,
3549                                           view->hadjustment->lower,
3550                                           view->hadjustment->upper -
3551                                           view->hadjustment->page_size));
3552
3553         return TRUE;
3554 }
3555
3556 static gboolean
3557 ev_view_drag_update_momentum (EvView *view)
3558 {
3559         int i;
3560         if (!view->drag_info.in_drag)
3561                 return FALSE;
3562
3563         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3564                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3565                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3566         }
3567
3568         /* Momentum is a moving average of 10ms granularity over
3569          * the last 100ms with each 10ms stored in buffer.
3570          */
3571
3572         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3573         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3574
3575         return TRUE;
3576 }
3577
3578 static gboolean
3579 ev_view_scroll_drag_release (EvView *view)
3580 {
3581         gdouble dhadj_value, dvadj_value;
3582         gdouble oldhadjustment, oldvadjustment;
3583
3584         view->drag_info.momentum.x /= 1.2;
3585         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3586
3587         dhadj_value = view->hadjustment->page_size *
3588                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
3589         dvadj_value = view->vadjustment->page_size *
3590                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
3591
3592         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3593         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3594
3595      /* When we reach the edges, we need either to absorb some momentum and bounce by
3596       * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3597      if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
3598            ((oldhadjustment + dhadj_value) < 0))
3599                 view->drag_info.momentum.x = 0;
3600         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
3601            ((oldvadjustment + dvadj_value) < 0))
3602                 view->drag_info.momentum.y = 0;
3603
3604         gtk_adjustment_set_value (view->hadjustment,
3605                                 MIN (oldhadjustment + dhadj_value,
3606                                 view->hadjustment->upper - view->hadjustment->page_size));
3607         gtk_adjustment_set_value (view->vadjustment,
3608                                 MIN (oldvadjustment + dvadj_value,
3609                                 view->vadjustment->upper - view->vadjustment->page_size));
3610
3611         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3612            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3613                 return FALSE;
3614         else
3615                 return TRUE;
3616 }
3617
3618 static gboolean
3619 ev_view_motion_notify_event (GtkWidget      *widget,
3620                              GdkEventMotion *event)
3621 {
3622         EvView *view = EV_VIEW (widget);
3623         gint x, y;
3624
3625         if (!view->document)
3626                 return FALSE;
3627
3628
3629         if (event->is_hint || event->window != view->layout.bin_window) {
3630             gtk_widget_get_pointer (widget, &x, &y);
3631         } else {
3632             x = event->x;
3633             y = event->y;
3634         }
3635
3636         if (view->scroll_info.autoscrolling) {
3637                 view->scroll_info.last_y = y;
3638                 return TRUE;
3639         }
3640
3641         if (view->selection_info.in_drag) {
3642                 if (gtk_drag_check_threshold (widget,
3643                                               view->selection_info.start.x,
3644                                               view->selection_info.start.y,
3645                                               x, y)) {
3646                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3647
3648                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3649
3650                         gtk_drag_begin (widget, target_list,
3651                                         GDK_ACTION_COPY,
3652                                         1, (GdkEvent *)event);
3653
3654                         view->selection_info.in_drag = FALSE;
3655
3656                         gtk_target_list_unref (target_list);
3657
3658                         return TRUE;
3659                 }
3660         } else if (view->image_dnd_info.in_drag) {
3661                 if (gtk_drag_check_threshold (widget,
3662                                               view->selection_info.start.x,
3663                                               view->selection_info.start.y,
3664                                               x, y)) {
3665                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3666
3667                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3668                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3669
3670                         gtk_drag_begin (widget, target_list,
3671                                         GDK_ACTION_COPY,
3672                                         1, (GdkEvent *)event);
3673
3674                         view->image_dnd_info.in_drag = FALSE;
3675
3676                         gtk_target_list_unref (target_list);
3677
3678                         return TRUE;
3679                 }
3680         }
3681
3682         switch (view->pressed_button) {
3683         case 1:
3684                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3685                  * documents only.
3686                  */
3687                 if (view->rotation != 0)
3688                         return FALSE;
3689
3690                 /* Schedule timeout to scroll during selection and additionally
3691                  * scroll once to allow arbitrary speed. */
3692                 if (!view->selection_scroll_id)
3693                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3694                                                                (GSourceFunc)selection_scroll_timeout_cb,
3695                                                                view);
3696                 else
3697                     selection_scroll_timeout_cb (view);
3698
3699                 view->selection_info.in_selection = TRUE;
3700                 view->motion.x = x + view->scroll_x;
3701                 view->motion.y = y + view->scroll_y;
3702
3703                 /* Queue an idle to handle the motion.  We do this because
3704                  * handling any selection events in the motion could be slower
3705                  * than new motion events reach us.  We always put it in the
3706                  * idle to make sure we catch up and don't visibly lag the
3707                  * mouse. */
3708                 if (!view->selection_update_id)
3709                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3710
3711                 return TRUE;
3712         case 2:
3713                 if (!view->drag_info.in_drag) {
3714                         gboolean start;
3715                         int i;
3716
3717                         start = gtk_drag_check_threshold (widget,
3718                                                           view->drag_info.start.x,
3719                                                           view->drag_info.start.y,
3720                                                           event->x_root,
3721                                                           event->y_root);
3722                         view->drag_info.in_drag = start;
3723                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3724                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3725                         /* Set 100 to choose how long it takes to build up momentum */
3726                         /* Clear out previous momentum info: */
3727                         for (i = 0; i < DRAG_HISTORY; i++) {
3728                                 view->drag_info.buffer[i].x = event->x;
3729                                 view->drag_info.buffer[i].y = event->y;
3730                         }
3731                         view->drag_info.momentum.x = 0;
3732                         view->drag_info.momentum.y = 0;
3733                 }
3734
3735                 if (view->drag_info.in_drag) {
3736                         int dx, dy;
3737                         gdouble dhadj_value, dvadj_value;
3738
3739                         view->drag_info.buffer[0].x = event->x;
3740                         view->drag_info.buffer[0].y = event->y;
3741
3742                         dx = event->x_root - view->drag_info.start.x;
3743                         dy = event->y_root - view->drag_info.start.y;
3744
3745                         dhadj_value = view->hadjustment->page_size *
3746                                       (gdouble)dx / widget->allocation.width;
3747                         dvadj_value = view->vadjustment->page_size *
3748                                       (gdouble)dy / widget->allocation.height;
3749
3750                         /* clamp scrolling to visible area */
3751                         gtk_adjustment_set_value (view->hadjustment,
3752                                                   MIN(view->drag_info.hadj - dhadj_value,
3753                                                       view->hadjustment->upper -
3754                                                       view->hadjustment->page_size));
3755                         gtk_adjustment_set_value (view->vadjustment,
3756                                                   MIN(view->drag_info.vadj - dvadj_value,
3757                                                       view->vadjustment->upper -
3758                                                       view->vadjustment->page_size));
3759
3760                         return TRUE;
3761                 }
3762
3763                 break;
3764         default:
3765                 ev_view_handle_cursor_over_xy (view, x, y);
3766         }
3767
3768         return FALSE;
3769 }
3770
3771 static gboolean
3772 ev_view_button_release_event (GtkWidget      *widget,
3773                               GdkEventButton *event)
3774 {
3775         EvView *view = EV_VIEW (widget);
3776         EvLink *link = NULL;
3777
3778         view->image_dnd_info.in_drag = FALSE;
3779
3780         if (view->scroll_info.autoscrolling) {
3781                 ev_view_autoscroll_stop (view);
3782                 view->pressed_button = -1;
3783
3784                 return TRUE;
3785         }
3786
3787         if (view->drag_info.in_drag) {
3788                 view->drag_info.release_timeout_id =
3789                         g_timeout_add (20,
3790                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3791         }
3792
3793         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3794                 link = ev_view_get_link_at_location (view, event->x, event->y);
3795         }
3796
3797         view->drag_info.in_drag = FALSE;
3798
3799         if (view->pressed_button == 2) {
3800                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3801         }
3802
3803         view->pressed_button = -1;
3804
3805         if (view->selection_scroll_id) {
3806             g_source_remove (view->selection_scroll_id);
3807             view->selection_scroll_id = 0;
3808         }
3809         if (view->selection_update_id) {
3810             g_source_remove (view->selection_update_id);
3811             view->selection_update_id = 0;
3812         }
3813
3814         if (view->selection_info.selections) {
3815                 clear_link_selected (view);
3816                 ev_view_update_primary_selection (view);
3817
3818                 if (view->selection_info.in_drag) {
3819                         clear_selection (view);
3820                         gtk_widget_queue_draw (widget);
3821                 }
3822
3823                 view->selection_info.in_drag = FALSE;
3824         } else if (link) {
3825                 if (event->button == 2) {
3826                         EvLinkAction    *action;
3827                         EvLinkActionType type;
3828
3829                         action = ev_link_get_action (link);
3830                         if (!action)
3831                                 return FALSE;
3832
3833                         type = ev_link_action_get_action_type (action);
3834                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3835                                 g_signal_emit (view,
3836                                                signals[SIGNAL_EXTERNAL_LINK],
3837                                                0, action);
3838                         }
3839                 } else {
3840                         ev_view_handle_link (view, link);
3841                 }
3842         } else if (view->presentation) {
3843                 switch (event->button) {
3844                         case 1:
3845                                 ev_view_next_page (view);
3846                                 return TRUE;
3847                         case 3:
3848                                 ev_view_previous_page (view);
3849                                 return TRUE;
3850                 }
3851         }
3852
3853         return FALSE;
3854 }
3855
3856 /* Goto Window */
3857 /* Cut and paste from gtkwindow.c */
3858 static void
3859 send_focus_change (GtkWidget *widget,
3860                    gboolean   in)
3861 {
3862         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3863
3864         g_object_ref (widget);
3865
3866         if (in)
3867                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3868         else
3869                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3870
3871         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3872         fevent->focus_change.window = g_object_ref (widget->window);
3873         fevent->focus_change.in = in;
3874
3875         gtk_widget_event (widget, fevent);
3876
3877         g_object_notify (G_OBJECT (widget), "has-focus");
3878
3879         g_object_unref (widget);
3880         gdk_event_free (fevent);
3881 }
3882
3883 static void
3884 ev_view_goto_window_hide (EvView *view)
3885 {
3886         /* send focus-in event */
3887         send_focus_change (view->goto_entry, FALSE);
3888         gtk_widget_hide (view->goto_window);
3889         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3890 }
3891
3892 static gboolean
3893 ev_view_goto_window_delete_event (GtkWidget   *widget,
3894                                   GdkEventAny *event,
3895                                   EvView      *view)
3896 {
3897         ev_view_goto_window_hide (view);
3898
3899         return TRUE;
3900 }
3901
3902 static gboolean
3903 key_is_numeric (guint keyval)
3904 {
3905         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3906                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3907 }
3908
3909 static gboolean
3910 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3911                                      GdkEventKey *event,
3912                                      EvView      *view)
3913 {
3914         switch (event->keyval) {
3915                 case GDK_Escape:
3916                 case GDK_Tab:
3917                 case GDK_KP_Tab:
3918                 case GDK_ISO_Left_Tab:
3919                         ev_view_goto_window_hide (view);
3920                         return TRUE;
3921                 case GDK_Return:
3922                 case GDK_KP_Enter:
3923                 case GDK_ISO_Enter:
3924                 case GDK_BackSpace:
3925                 case GDK_Delete:
3926                         return FALSE;
3927                 default:
3928                         if (!key_is_numeric (event->keyval))
3929                                 return TRUE;
3930         }
3931
3932         return FALSE;
3933 }
3934
3935 static gboolean
3936 ev_view_goto_window_button_press_event (GtkWidget      *widget,
3937                                         GdkEventButton *event,
3938                                         EvView         *view)
3939 {
3940         ev_view_goto_window_hide (view);
3941
3942         return TRUE;
3943 }
3944
3945 static void
3946 ev_view_goto_entry_activate (GtkEntry *entry,
3947                              EvView   *view)
3948 {
3949         const gchar *text;
3950         gint         page;
3951
3952         text = gtk_entry_get_text (entry);
3953         page = atoi (text) - 1;
3954
3955         ev_view_goto_window_hide (view);
3956
3957         if (page >= 0 && page < ev_document_get_n_pages (view->document)) {
3958                 ev_document_model_set_page (view->model, page);
3959         }
3960 }
3961
3962 static void
3963 ev_view_goto_window_create (EvView *view)
3964 {
3965         GtkWidget *frame, *hbox, *toplevel, *label;
3966
3967         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
3968
3969         if (view->goto_window) {
3970                 if (GTK_WINDOW (toplevel)->group)
3971                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3972                                                      GTK_WINDOW (view->goto_window));
3973                 else if (GTK_WINDOW (view->goto_window)->group)
3974                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
3975                                                         GTK_WINDOW (view->goto_window));
3976                 return;
3977         }
3978
3979         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
3980         gtk_window_set_screen (GTK_WINDOW (view->goto_window),
3981                                gtk_widget_get_screen (GTK_WIDGET (view)));
3982
3983         if (GTK_WINDOW (toplevel)->group)
3984                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3985                                              GTK_WINDOW (view->goto_window));
3986
3987         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
3988
3989         g_signal_connect (view->goto_window, "delete_event",
3990                           G_CALLBACK (ev_view_goto_window_delete_event),
3991                           view);
3992         g_signal_connect (view->goto_window, "key_press_event",
3993                           G_CALLBACK (ev_view_goto_window_key_press_event),
3994                           view);
3995         g_signal_connect (view->goto_window, "button_press_event",
3996                           G_CALLBACK (ev_view_goto_window_button_press_event),
3997                           view);
3998
3999         frame = gtk_frame_new (NULL);
4000         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
4001         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
4002         gtk_widget_show (frame);
4003
4004         hbox = gtk_hbox_new (FALSE, 0);
4005         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
4006         gtk_container_add (GTK_CONTAINER (frame), hbox);
4007         gtk_widget_show (hbox);
4008
4009         label = gtk_label_new(_("Jump to page:"));
4010         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
4011         gtk_widget_show (label);
4012         gtk_widget_realize (label);
4013
4014         view->goto_entry = gtk_entry_new ();
4015         g_signal_connect (view->goto_entry, "activate",
4016                           G_CALLBACK (ev_view_goto_entry_activate),
4017                           view);
4018         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
4019         gtk_widget_show (view->goto_entry);
4020         gtk_widget_realize (view->goto_entry);
4021 }
4022
4023 static void
4024 ev_view_goto_entry_grab_focus (EvView *view)
4025 {
4026         GtkWidgetClass *entry_parent_class;
4027
4028         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
4029         (entry_parent_class->grab_focus) (view->goto_entry);
4030
4031         send_focus_change (view->goto_entry, TRUE);
4032 }
4033
4034 static void
4035 ev_view_goto_window_send_key_event (EvView   *view,
4036                                     GdkEvent *event)
4037 {
4038         GdkEventKey *new_event;
4039         GdkScreen   *screen;
4040
4041         /* Move goto window off screen */
4042         screen = gtk_widget_get_screen (GTK_WIDGET (view));
4043         gtk_window_move (GTK_WINDOW (view->goto_window),
4044                          gdk_screen_get_width (screen) + 1,
4045                          gdk_screen_get_height (screen) + 1);
4046         gtk_widget_show (view->goto_window);
4047
4048         new_event = (GdkEventKey *) gdk_event_copy (event);
4049         g_object_unref (new_event->window);
4050         new_event->window = g_object_ref (view->goto_window->window);
4051         gtk_widget_realize (view->goto_window);
4052
4053         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
4054         gdk_event_free ((GdkEvent *)new_event);
4055         gtk_widget_hide (view->goto_window);
4056 }
4057
4058 static gboolean
4059 ev_view_key_press_event (GtkWidget   *widget,
4060                          GdkEventKey *event)
4061 {
4062         EvView *view = EV_VIEW (widget);
4063         EvPresentationState current;
4064
4065         if (!view->document)
4066                 return FALSE;
4067
4068         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
4069                 /* Forward key events to current focused window child */
4070                 if (view->window_child_focus) {
4071                         GdkEventKey *new_event;
4072                         gboolean     handled;
4073
4074                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
4075                         g_object_unref (new_event->window);
4076                         new_event->window = g_object_ref (view->window_child_focus->window->window);
4077                         gtk_widget_realize (view->window_child_focus->window);
4078                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
4079                         gdk_event_free ((GdkEvent *)new_event);
4080
4081                         return handled;
4082                 }
4083
4084                 return FALSE;
4085         }
4086
4087         if (!view->presentation ||
4088             view->presentation_state == EV_PRESENTATION_END)
4089                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4090
4091
4092         current = view->presentation_state;
4093
4094         switch (event->keyval) {
4095                 case GDK_b:
4096                 case GDK_B:
4097                 case GDK_period:
4098                 case GDK_KP_Decimal:
4099                         view->presentation_state =
4100                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
4101                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
4102                         break;
4103                 case GDK_w:
4104                 case GDK_W:
4105                         view->presentation_state =
4106                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
4107                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
4108                         break;
4109                 default:
4110                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
4111                             view->presentation_state == EV_PRESENTATION_WHITE) {
4112                                 view->presentation_state = EV_PRESENTATION_NORMAL;
4113                         }
4114         }
4115
4116         if (current == view->presentation_state) {
4117                 if (ev_document_get_n_pages (view->document) > 1 &&
4118                     key_is_numeric (event->keyval)) {
4119                         gint x, y;
4120
4121                         ev_view_goto_window_create (view);
4122                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
4123                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4124                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
4125                         gtk_widget_show (view->goto_window);
4126                         ev_view_goto_entry_grab_focus (view);
4127
4128                         return TRUE;
4129                 }
4130
4131                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4132         }
4133
4134         switch (view->presentation_state) {
4135                 case EV_PRESENTATION_NORMAL:
4136                 case EV_PRESENTATION_BLACK:
4137                         gdk_window_set_background (view->layout.bin_window,
4138                                                    &widget->style->black);
4139                         break;
4140                 case EV_PRESENTATION_WHITE:
4141                         gdk_window_set_background (view->layout.bin_window,
4142                                                    &widget->style->white);
4143                         break;
4144                 default:
4145                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4146         }
4147
4148         gtk_widget_queue_draw (widget);
4149         return TRUE;
4150 }
4151
4152 static gint
4153 ev_view_focus_in (GtkWidget     *widget,
4154                   GdkEventFocus *event)
4155 {
4156         if (EV_VIEW (widget)->pixbuf_cache)
4157                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4158         gtk_widget_queue_draw (widget);
4159
4160         return FALSE;
4161 }
4162
4163 static gint
4164 ev_view_focus_out (GtkWidget     *widget,
4165                      GdkEventFocus *event)
4166 {
4167         if (EV_VIEW (widget)->goto_window)
4168                 ev_view_goto_window_hide (EV_VIEW (widget));
4169
4170         if (EV_VIEW (widget)->pixbuf_cache)
4171                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4172         gtk_widget_queue_draw (widget);
4173
4174         return FALSE;
4175 }
4176
4177 static gboolean
4178 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4179 {
4180         EvView *view = EV_VIEW (widget);
4181
4182         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4183                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4184
4185         return FALSE;
4186 }
4187
4188 static gboolean
4189 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4190 {
4191         EvView *view = EV_VIEW (widget);
4192
4193         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4194
4195         return FALSE;
4196 }
4197
4198 static void
4199 ev_view_style_set (GtkWidget *widget,
4200                    GtkStyle  *old_style)
4201 {
4202         if (EV_VIEW (widget)->pixbuf_cache)
4203                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4204
4205         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
4206 }
4207
4208 /*** Drawing ***/
4209
4210 static guint32
4211 ev_gdk_color_to_rgb (const GdkColor *color)
4212 {
4213   guint32 result;
4214   result = (0xff0000 | (color->red & 0xff00));
4215   result <<= 8;
4216   result |= ((color->green & 0xff00) | (color->blue >> 8));
4217   return result;
4218 }
4219
4220 static void
4221 draw_rubberband (GtkWidget *widget, GdkWindow *window,
4222                  const GdkRectangle *rect, guchar alpha)
4223 {
4224         GdkGC *gc;
4225         GdkPixbuf *pixbuf;
4226         GdkColor *fill_color_gdk;
4227         guint fill_color;
4228
4229         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
4230         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
4231
4232         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
4233                                  rect->width, rect->height);
4234         gdk_pixbuf_fill (pixbuf, fill_color);
4235
4236         gdk_draw_pixbuf (window, NULL, pixbuf,
4237                          0, 0,
4238                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4239                          rect->width, rect->height,
4240                          GDK_RGB_DITHER_NONE,
4241                          0, 0);
4242
4243         g_object_unref (pixbuf);
4244
4245         gc = gdk_gc_new (window);
4246         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
4247         gdk_draw_rectangle (window, gc, FALSE,
4248                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4249                             rect->width - 1,
4250                             rect->height - 1);
4251         g_object_unref (gc);
4252
4253         gdk_color_free (fill_color_gdk);
4254 }
4255
4256
4257 static void
4258 highlight_find_results (EvView *view, int page)
4259 {
4260         gint i, n_results = 0;
4261
4262         n_results = ev_view_find_get_n_results (view, page);
4263
4264         for (i = 0; i < n_results; i++) {
4265                 EvRectangle *rectangle;
4266                 GdkRectangle view_rectangle;
4267                 guchar alpha;
4268
4269                 if (i == view->find_result && page == view->current_page) {
4270                         alpha = 0x90;
4271                 } else {
4272                         alpha = 0x20;
4273                 }
4274
4275                 rectangle = ev_view_find_get_result (view, page, i);
4276                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4277                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
4278                                  &view_rectangle, alpha);
4279         }
4280 }
4281
4282 static void
4283 draw_loading_text (EvView       *view,
4284                    GdkRectangle *page_area,
4285                    GdkRectangle *expose_area)
4286 {
4287         cairo_t *cr;
4288         gint     width, height;
4289
4290         if (!view->loading_text) {
4291                 const gchar *loading_text = _("Loading...");
4292                 PangoLayout *layout;
4293                 PangoFontDescription *font_desc;
4294                 PangoRectangle logical_rect;
4295                 gint target_width;
4296                 gdouble real_scale;
4297
4298                 ev_document_fc_mutex_lock ();
4299
4300                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
4301
4302                 font_desc = pango_font_description_new ();
4303
4304                 /* We set the font to be 10 points, get the size, and scale appropriately */
4305                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
4306                 pango_layout_set_font_description (layout, font_desc);
4307                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4308
4309                 target_width = MAX (page_area->width / 2, 1);
4310                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
4311                 pango_font_description_set_size (font_desc, (int)real_scale);
4312                 pango_layout_set_font_description (layout, font_desc);
4313                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4314
4315                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
4316                                                                  logical_rect.width,
4317                                                                  logical_rect.height);
4318                 cr = cairo_create (view->loading_text);
4319                 cairo_set_source_rgb (cr,
4320                                       155 / (double)255,
4321                                       155 / (double)255,
4322                                       155 / (double)255);
4323                 pango_cairo_show_layout (cr, layout);
4324                 cairo_destroy (cr);
4325
4326                 pango_font_description_free (font_desc);
4327                 g_object_unref (layout);
4328
4329                 ev_document_fc_mutex_unlock ();
4330         }
4331
4332         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
4333         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
4334
4335         cr = gdk_cairo_create (view->layout.bin_window);
4336         cairo_translate (cr,
4337                          page_area->x + width,
4338                          page_area->y + height);
4339         cairo_set_source_surface (cr, view->loading_text, 0, 0);
4340         cairo_paint (cr);
4341         cairo_destroy (cr);
4342 }
4343
4344 static void
4345 draw_one_page (EvView       *view,
4346                gint          page,
4347                cairo_t      *cr,
4348                GdkRectangle *page_area,
4349                GtkBorder    *border,
4350                GdkRectangle *expose_area,
4351                gboolean     *page_ready)
4352 {
4353         GdkRectangle overlap;
4354         GdkRectangle real_page_area;
4355
4356         g_assert (view->document);
4357
4358         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4359                 return;
4360
4361         /* Render the document itself */
4362         real_page_area = *page_area;
4363
4364         real_page_area.x += border->left;
4365         real_page_area.y += border->top;
4366         real_page_area.width -= (border->left + border->right);
4367         real_page_area.height -= (border->top + border->bottom);
4368         *page_ready = TRUE;
4369
4370         if (!view->presentation) {
4371                 gint current_page;
4372
4373                 current_page = ev_document_model_get_page (view->model);
4374                 ev_document_misc_paint_one_page (view->layout.bin_window,
4375                                                  GTK_WIDGET (view),
4376                                                  page_area, border,
4377                                                  page == current_page);
4378         }
4379
4380         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4381                 gint             width, height;
4382                 gint             page_width, page_height;
4383                 cairo_surface_t *page_surface = NULL;
4384                 gint             selection_width, selection_height;
4385                 cairo_surface_t *selection_surface = NULL;
4386
4387                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4388
4389                 if (!page_surface) {
4390                         if (!view->presentation) {
4391                                 draw_loading_text (view,
4392                                                    &real_page_area,
4393                                                    expose_area);
4394                         }
4395
4396                         *page_ready = FALSE;
4397
4398                         return;
4399                 }
4400
4401                 ev_view_get_page_size (view, page, &width, &height);
4402
4403                 page_width = cairo_image_surface_get_width (page_surface);
4404                 page_height = cairo_image_surface_get_height (page_surface);
4405
4406                 cairo_save (cr);
4407                 cairo_translate (cr, overlap.x, overlap.y);
4408
4409                 if (width != page_width || height != page_height) {
4410                         cairo_pattern_set_filter (cairo_get_source (cr),
4411                                                   CAIRO_FILTER_FAST);
4412                         cairo_scale (cr,
4413                                      (gdouble)width / page_width,
4414                                      (gdouble)height / page_height);
4415                 }
4416
4417                 cairo_surface_set_device_offset (page_surface,
4418                                                  overlap.x - real_page_area.x,
4419                                                  overlap.y - real_page_area.y);
4420                 cairo_set_source_surface (cr, page_surface, 0, 0);
4421                 cairo_paint (cr);
4422                 cairo_restore (cr);
4423
4424                 /* Get the selection pixbuf iff we have something to draw */
4425                 if (find_selection_for_page (view, page) &&
4426                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4427                         selection_surface =
4428                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4429                                                                        page,
4430                                                                        view->scale,
4431                                                                        NULL);
4432                 }
4433
4434                 if (!selection_surface) {
4435                         return;
4436                 }
4437
4438                 selection_width = cairo_image_surface_get_width (selection_surface);
4439                 selection_height = cairo_image_surface_get_height (selection_surface);
4440
4441                 cairo_save (cr);
4442                 cairo_translate (cr, overlap.x, overlap.y);
4443
4444                 if (width != selection_width || height != selection_height) {
4445                         cairo_pattern_set_filter (cairo_get_source (cr),
4446                                                   CAIRO_FILTER_FAST);
4447                         cairo_scale (cr,
4448                                      (gdouble)width / selection_width,
4449                                      (gdouble)height / selection_height);
4450                 }
4451
4452                 cairo_surface_set_device_offset (selection_surface,
4453                                                  overlap.x - real_page_area.x,
4454                                                  overlap.y - real_page_area.y);
4455                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4456                 cairo_paint (cr);
4457                 cairo_restore (cr);
4458         }
4459 }
4460
4461 /*** GObject functions ***/
4462
4463 static void
4464 ev_view_finalize (GObject *object)
4465 {
4466         EvView *view = EV_VIEW (object);
4467
4468         clear_selection (view);
4469         clear_link_selected (view);
4470
4471         if (view->image_dnd_info.image)
4472                 g_object_unref (view->image_dnd_info.image);
4473         view->image_dnd_info.image = NULL;
4474
4475         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4476 }
4477
4478 static void
4479 ev_view_destroy (GtkObject *object)
4480 {
4481         EvView *view = EV_VIEW (object);
4482
4483         if (view->model) {
4484                 g_object_unref (view->model);
4485                 view->model = NULL;
4486         }
4487
4488         if (view->document) {
4489                 g_object_unref (view->document);
4490                 view->document = NULL;
4491         }
4492
4493         if (view->pixbuf_cache) {
4494                 g_object_unref (view->pixbuf_cache);
4495                 view->pixbuf_cache = NULL;
4496         }
4497
4498         if (view->goto_window) {
4499                 gtk_widget_destroy (view->goto_window);
4500                 view->goto_window = NULL;
4501                 view->goto_entry = NULL;
4502         }
4503
4504         ev_view_window_children_free (view);
4505
4506         if (view->selection_scroll_id) {
4507             g_source_remove (view->selection_scroll_id);
4508             view->selection_scroll_id = 0;
4509         }
4510
4511         if (view->selection_update_id) {
4512             g_source_remove (view->selection_update_id);
4513             view->selection_update_id = 0;
4514         }
4515
4516         if (view->loading_text) {
4517                 cairo_surface_destroy (view->loading_text);
4518                 view->loading_text = NULL;
4519         }
4520
4521         if (view->scroll_info.timeout_id) {
4522             g_source_remove (view->scroll_info.timeout_id);
4523             view->scroll_info.timeout_id = 0;
4524         }
4525
4526         if (view->drag_info.drag_timeout_id) {
4527                 g_source_remove (view->drag_info.drag_timeout_id);
4528                 view->drag_info.drag_timeout_id = 0;
4529         }
4530
4531         if (view->drag_info.release_timeout_id) {
4532                 g_source_remove (view->drag_info.release_timeout_id);
4533                 view->drag_info.release_timeout_id = 0;
4534         }
4535
4536         ev_view_presentation_transition_stop (view);
4537
4538         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4539
4540         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4541 }
4542
4543 static void
4544 ev_view_set_property (GObject      *object,
4545                       guint         prop_id,
4546                       const GValue *value,
4547                       GParamSpec   *pspec)
4548 {
4549         EvView *view = EV_VIEW (object);
4550
4551         switch (prop_id) {
4552                 case PROP_CONTINUOUS:
4553                         ev_view_set_continuous (view, g_value_get_boolean (value));
4554                         break;
4555                 case PROP_DUAL_PAGE:
4556                         ev_view_set_dual_page (view, g_value_get_boolean (value));
4557                         break;
4558                 case PROP_FULLSCREEN:
4559                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
4560                         break;
4561                 case PROP_PRESENTATION:
4562                         ev_view_set_presentation (view, g_value_get_boolean (value));
4563                         break;
4564                 case PROP_SIZING_MODE:
4565                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
4566                         break;
4567                 case PROP_ZOOM:
4568                         ev_view_set_zoom (view, g_value_get_double (value));
4569                         break;
4570                 case PROP_ROTATION:
4571                         ev_view_set_rotation (view, g_value_get_int (value));
4572                         break;
4573                 default:
4574                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4575         }
4576 }
4577
4578 static AtkObject *
4579 ev_view_get_accessible (GtkWidget *widget)
4580 {
4581         static gboolean first_time = TRUE;
4582
4583         if (first_time) {
4584                 AtkObjectFactory *factory;
4585                 AtkRegistry *registry;
4586                 GType derived_type;
4587                 GType derived_atk_type;
4588
4589                 /*
4590                  * Figure out whether accessibility is enabled by looking at the
4591                  * type of the accessible object which would be created for
4592                  * the parent type of EvView.
4593                  */
4594                 derived_type = g_type_parent (EV_TYPE_VIEW);
4595
4596                 registry = atk_get_default_registry ();
4597                 factory = atk_registry_get_factory (registry,
4598                                                     derived_type);
4599                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4600                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4601                         atk_registry_set_factory_type (registry,
4602                                                        EV_TYPE_VIEW,
4603                                                        ev_view_accessible_factory_get_type ());
4604                 first_time = FALSE;
4605         }
4606         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4607 }
4608
4609 static void
4610 ev_view_get_property (GObject *object,
4611                       guint prop_id,
4612                       GValue *value,
4613                       GParamSpec *pspec)
4614 {
4615         EvView *view = EV_VIEW (object);
4616
4617         switch (prop_id) {
4618                 case PROP_CONTINUOUS:
4619                         g_value_set_boolean (value, view->continuous);
4620                         break;
4621                 case PROP_DUAL_PAGE:
4622                         g_value_set_boolean (value, view->dual_page);
4623                         break;
4624                 case PROP_FULLSCREEN:
4625                         g_value_set_boolean (value, view->fullscreen);
4626                         break;
4627                 case PROP_PRESENTATION:
4628                         g_value_set_boolean (value, view->presentation);
4629                         break;
4630                 case PROP_SIZING_MODE:
4631                         g_value_set_enum (value, view->sizing_mode);
4632                         break;
4633                 case PROP_ZOOM:
4634                         g_value_set_double (value, view->scale);
4635                         break;
4636                 case PROP_ROTATION:
4637                         g_value_set_int (value, view->rotation);
4638                         break;
4639                 case PROP_HAS_SELECTION:
4640                         g_value_set_boolean (value,
4641                                              view->selection_info.selections != NULL);
4642                         break;
4643                 default:
4644                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4645         }
4646 }
4647
4648 static void
4649 ev_view_class_init (EvViewClass *class)
4650 {
4651         GObjectClass *object_class = G_OBJECT_CLASS (class);
4652         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4653         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4654         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4655         GtkBindingSet *binding_set;
4656
4657         object_class->finalize = ev_view_finalize;
4658         object_class->set_property = ev_view_set_property;
4659         object_class->get_property = ev_view_get_property;
4660
4661         widget_class->expose_event = ev_view_expose_event;
4662         widget_class->button_press_event = ev_view_button_press_event;
4663         widget_class->motion_notify_event = ev_view_motion_notify_event;
4664         widget_class->button_release_event = ev_view_button_release_event;
4665         widget_class->key_press_event = ev_view_key_press_event;
4666         widget_class->focus_in_event = ev_view_focus_in;
4667         widget_class->focus_out_event = ev_view_focus_out;
4668         widget_class->get_accessible = ev_view_get_accessible;
4669         widget_class->size_request = ev_view_size_request;
4670         widget_class->size_allocate = ev_view_size_allocate;
4671         widget_class->realize = ev_view_realize;
4672         widget_class->scroll_event = ev_view_scroll_event;
4673         widget_class->enter_notify_event = ev_view_enter_notify_event;
4674         widget_class->leave_notify_event = ev_view_leave_notify_event;
4675         widget_class->style_set = ev_view_style_set;
4676         widget_class->drag_data_get = ev_view_drag_data_get;
4677         widget_class->drag_motion = ev_view_drag_motion;
4678         widget_class->popup_menu = ev_view_popup_menu;
4679         widget_class->query_tooltip = ev_view_query_tooltip;
4680
4681         gtk_object_class->destroy = ev_view_destroy;
4682
4683         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4684
4685         class->binding_activated = ev_view_scroll;
4686
4687         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4688                          G_TYPE_FROM_CLASS (object_class),
4689                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4690                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4691                          NULL, NULL,
4692                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4693                          G_TYPE_NONE, 2,
4694                          GTK_TYPE_SCROLL_TYPE,
4695                          G_TYPE_BOOLEAN);
4696         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4697                          G_TYPE_FROM_CLASS (object_class),
4698                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4699                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4700                          NULL, NULL,
4701                          g_cclosure_marshal_VOID__OBJECT,
4702                          G_TYPE_NONE, 1,
4703                          G_TYPE_OBJECT);
4704         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4705                          G_TYPE_FROM_CLASS (object_class),
4706                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4707                          G_STRUCT_OFFSET (EvViewClass, external_link),
4708                          NULL, NULL,
4709                          g_cclosure_marshal_VOID__OBJECT,
4710                          G_TYPE_NONE, 1,
4711                          G_TYPE_OBJECT);
4712         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4713                          G_TYPE_FROM_CLASS (object_class),
4714                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4715                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4716                          NULL, NULL,
4717                          g_cclosure_marshal_VOID__OBJECT,
4718                          G_TYPE_NONE, 1,
4719                          G_TYPE_OBJECT);
4720
4721
4722         g_object_class_install_property (object_class,
4723                                          PROP_CONTINUOUS,
4724                                          g_param_spec_boolean ("continuous",
4725                                                                "Continuous",
4726                                                                "Continuous scrolling mode",
4727                                                                TRUE,
4728                                                                G_PARAM_READWRITE));
4729
4730         g_object_class_install_property (object_class,
4731                                          PROP_DUAL_PAGE,
4732                                          g_param_spec_boolean ("dual-page",
4733                                                                "Dual Page",
4734                                                                "Two pages visible at once",
4735                                                                FALSE,
4736                                                                G_PARAM_READWRITE));
4737         g_object_class_install_property (object_class,
4738                                          PROP_FULLSCREEN,
4739                                          g_param_spec_boolean ("fullscreen",
4740                                                                "Full Screen",
4741                                                                "Draw page in a fullscreen fashion",
4742                                                                FALSE,
4743                                                                G_PARAM_READWRITE));
4744         g_object_class_install_property (object_class,
4745                                          PROP_PRESENTATION,
4746                                          g_param_spec_boolean ("presentation",
4747                                                                "Presentation",
4748                                                                "Draw page in presentation mode",
4749                                                                TRUE,
4750                                                                G_PARAM_READWRITE));
4751
4752         g_object_class_install_property (object_class,
4753                                          PROP_SIZING_MODE,
4754                                          g_param_spec_enum ("sizing-mode",
4755                                                             "Sizing Mode",
4756                                                             "Sizing Mode",
4757                                                             EV_TYPE_SIZING_MODE,
4758                                                             EV_SIZING_FIT_WIDTH,
4759                                                             G_PARAM_READWRITE));
4760
4761         g_object_class_install_property (object_class,
4762                                          PROP_ZOOM,
4763                                          g_param_spec_double ("zoom",
4764                                                               "Zoom factor",
4765                                                               "Zoom factor",
4766                                                               0,
4767                                                               G_MAXDOUBLE,
4768                                                               1.0,
4769                                                               G_PARAM_READWRITE));
4770         g_object_class_install_property (object_class,
4771                                          PROP_ROTATION,
4772                                          g_param_spec_double ("rotation",
4773                                                               "Rotation",
4774                                                               "Rotation",
4775                                                               0,
4776                                                               360,
4777                                                               0,
4778                                                               G_PARAM_READWRITE));
4779
4780         g_object_class_install_property (object_class,
4781                                          PROP_HAS_SELECTION,
4782                                          g_param_spec_boolean ("has-selection",
4783                                                                "Has selection",
4784                                                                "The view has selections",
4785                                                                FALSE,
4786                                                                G_PARAM_READABLE));
4787
4788         binding_set = gtk_binding_set_by_class (class);
4789
4790         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4791         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4792         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4793         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4794         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4795         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4796         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4797         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4798         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4799                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4800         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4801                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4802         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4803                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4804         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4805                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4806
4807 }
4808
4809 static void
4810 ev_view_init (EvView *view)
4811 {
4812         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4813
4814         view->start_page = -1;
4815         view->end_page = -1;
4816         view->spacing = 5;
4817         view->scale = 1.0;
4818         view->current_page = 0;
4819         view->pressed_button = -1;
4820         view->cursor = EV_VIEW_CURSOR_NORMAL;
4821         view->drag_info.in_drag = FALSE;
4822         view->scroll_info.autoscrolling = FALSE;
4823         view->selection_info.selections = NULL;
4824         view->selection_info.in_selection = FALSE;
4825         view->selection_info.in_drag = FALSE;
4826         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4827         view->continuous = TRUE;
4828         view->dual_page = FALSE;
4829         view->presentation = FALSE;
4830         view->presentation_state = EV_PRESENTATION_NORMAL;
4831         view->fullscreen = FALSE;
4832         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4833         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4834         view->jump_to_find_result = TRUE;
4835         view->highlight_find_results = FALSE;
4836
4837         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4838         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4839 }
4840
4841 /*** Callbacks ***/
4842
4843 static void
4844 ev_view_change_page (EvView *view,
4845                      gint    new_page,
4846                      gboolean start_transition)
4847 {
4848         gint x, y;
4849
4850         view->current_page = new_page;
4851         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4852
4853         if (view->presentation && start_transition)
4854                 ev_view_presentation_transition_start (view);
4855
4856         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4857         ev_view_handle_cursor_over_xy (view, x, y);
4858
4859         gtk_widget_queue_resize (GTK_WIDGET (view));
4860 }
4861
4862 static void
4863 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4864                                      EvView                *view)
4865 {
4866         g_object_unref (view->animation);
4867         view->animation = NULL;
4868         ev_view_change_page (view, view->current_page, TRUE);
4869 }
4870
4871 /**
4872  * ev_view_transition_animation_cancel:
4873  * @animation: Animation to finish
4874  * @view: An EvView
4875  *
4876  * Does almost the same as cancel, but without scheduling the transition.
4877  */
4878
4879 static void
4880 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4881                                      EvView                *view)
4882 {
4883         g_object_unref (view->animation);
4884         view->animation = NULL;
4885         ev_view_change_page (view, view->current_page, FALSE);
4886 }
4887
4888 static void
4889 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4890                                     gdouble                progress,
4891                                     EvView                *view)
4892 {
4893         gtk_widget_queue_draw (GTK_WIDGET (view));
4894 }
4895
4896 static void
4897 ev_view_presentation_animation_start (EvView *view,
4898                                       int     new_page)
4899 {
4900         EvTransitionEffect *effect = NULL;
4901         cairo_surface_t *surface;
4902
4903         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4904                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4905                                                             view->current_page);
4906         if (!effect)
4907                 return;
4908
4909         view->animation = ev_transition_animation_new (effect);
4910
4911         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4912         ev_transition_animation_set_origin_surface (view->animation, surface);
4913         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, new_page);
4914         if (surface)
4915                 ev_transition_animation_set_dest_surface (view->animation, surface);
4916
4917         g_signal_connect (view->animation, "frame",
4918                           G_CALLBACK (ev_view_transition_animation_frame), view);
4919         g_signal_connect (view->animation, "finished",
4920                           G_CALLBACK (ev_view_transition_animation_finish), view);
4921 }
4922
4923 static void
4924 job_finished_cb (EvPixbufCache *pixbuf_cache,
4925                  GdkRegion     *region,
4926                  EvView        *view)
4927 {
4928         if (view->animation) {
4929                 cairo_surface_t *surface;
4930
4931                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4932                 ev_transition_animation_set_dest_surface (view->animation, surface);
4933         }
4934
4935         if (region) {
4936                 gdk_window_invalidate_region (view->layout.bin_window,
4937                                               region, TRUE);
4938         } else {
4939                 gtk_widget_queue_draw (GTK_WIDGET (view));
4940         }
4941 }
4942
4943 static void
4944 ev_view_page_changed_cb (EvDocumentModel *model,
4945                          gint             old_page,
4946                          gint             new_page,
4947                          EvView          *view)
4948 {
4949         if (!view->document)
4950                 return;
4951
4952         if (view->current_page != new_page) {
4953                 if (view->presentation)
4954                         ev_view_presentation_animation_start (view, new_page);
4955
4956                 ev_view_change_page (view, new_page, TRUE);
4957         } else {
4958                 gtk_widget_queue_draw (GTK_WIDGET (view));
4959         }
4960
4961         view->find_result = 0;
4962 }
4963
4964 static void
4965 on_adjustment_value_changed (GtkAdjustment *adjustment,
4966                              EvView        *view)
4967 {
4968         int dx = 0, dy = 0;
4969         gint x, y;
4970         GList *children, *l;
4971
4972         if (! GTK_WIDGET_REALIZED (view))
4973                 return;
4974
4975         if (view->hadjustment) {
4976                 dx = view->scroll_x - (int) view->hadjustment->value;
4977                 view->scroll_x = (int) view->hadjustment->value;
4978         } else {
4979                 view->scroll_x = 0;
4980         }
4981
4982         if (view->vadjustment) {
4983                 dy = view->scroll_y - (int) view->vadjustment->value;
4984                 view->scroll_y = (int) view->vadjustment->value;
4985         } else {
4986                 view->scroll_y = 0;
4987         }
4988
4989         children = gtk_container_get_children (GTK_CONTAINER (view));
4990         for (l = children; l && l->data; l = g_list_next (l)) {
4991                 gint       child_x, child_y;
4992                 GtkWidget *child = (GtkWidget *)l->data;
4993
4994                 gtk_container_child_get (GTK_CONTAINER (view),
4995                                          child,
4996                                          "x", &child_x,
4997                                          "y", &child_y,
4998                                          NULL);
4999                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
5000         }
5001         g_list_free (children);
5002
5003         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
5004                 EvViewWindowChild *child;
5005
5006                 child = (EvViewWindowChild *)l->data;
5007
5008                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
5009         }
5010
5011         if (view->pending_resize)
5012                 gtk_widget_queue_draw (GTK_WIDGET (view));
5013         else
5014                 gdk_window_scroll (view->layout.bin_window, dx, dy);
5015
5016         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5017         ev_view_handle_cursor_over_xy (view, x, y);
5018
5019         if (view->document)
5020                 view_update_range_and_current_page (view);
5021 }
5022
5023 GtkWidget*
5024 ev_view_new (void)
5025 {
5026         GtkWidget *view;
5027
5028         view = g_object_new (EV_TYPE_VIEW, NULL);
5029
5030         return view;
5031 }
5032
5033 static void
5034 setup_caches (EvView *view)
5035 {
5036         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
5037         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
5038         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
5039 }
5040
5041 static void
5042 clear_caches (EvView *view)
5043 {
5044         if (view->pixbuf_cache) {
5045                 g_object_unref (view->pixbuf_cache);
5046                 view->pixbuf_cache = NULL;
5047         }
5048 }
5049
5050 void
5051 ev_view_set_loading (EvView       *view,
5052                      gboolean      loading)
5053 {
5054         view->loading = loading;
5055         gtk_widget_queue_draw (GTK_WIDGET (view));
5056 }
5057
5058 static gboolean
5059 ev_view_autoscroll_cb (EvView *view)
5060 {
5061         gdouble speed, value;
5062
5063         /* If the user stops autoscrolling, autoscrolling will be
5064          * set to false but the timeout will continue; stop the timeout: */
5065         if (!view->scroll_info.autoscrolling) {
5066                 view->scroll_info.timeout_id = 0;
5067                 return FALSE;
5068         }
5069
5070         if (view->scroll_info.last_y > view->scroll_info.start_y &&
5071                 (view->scroll_info.last_y < view->scroll_info.start_y))
5072                 return TRUE;
5073
5074         /* Replace 100 with your speed of choice: The lower the faster.
5075          * Replace 3 with another speed of choice: The higher, the faster it accelerated
5076          *      based on the distance of the starting point from the mouse
5077          * (All also effected by the timeout interval of this callback) */
5078
5079         if (view->scroll_info.start_y > view->scroll_info.last_y)
5080                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
5081         else
5082                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
5083
5084         value = gtk_adjustment_get_value (view->vadjustment);
5085         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
5086         gtk_adjustment_set_value (view->vadjustment, value);
5087
5088         return TRUE;
5089
5090 }
5091
5092 void
5093 ev_view_autoscroll_start (EvView *view)
5094 {
5095         gint x, y;
5096
5097         g_return_if_fail (EV_IS_VIEW (view));
5098
5099         if (view->scroll_info.autoscrolling)
5100                 return;
5101
5102         view->scroll_info.autoscrolling = TRUE;
5103         view->scroll_info.timeout_id =
5104                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5105                                view);
5106
5107         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5108         ev_view_handle_cursor_over_xy (view, x, y);
5109 }
5110
5111 void
5112 ev_view_autoscroll_stop (EvView *view)
5113 {
5114         gint x, y;
5115
5116         g_return_if_fail (EV_IS_VIEW (view));
5117
5118         if (!view->scroll_info.autoscrolling)
5119                 return;
5120
5121         view->scroll_info.autoscrolling = FALSE;
5122         if (view->scroll_info.timeout_id) {
5123                 g_source_remove (view->scroll_info.timeout_id);
5124                 view->scroll_info.timeout_id = 0;
5125         }
5126
5127         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5128         ev_view_handle_cursor_over_xy (view, x, y);
5129 }
5130
5131 static void
5132 ev_view_document_changed_cb (EvDocumentModel *model,
5133                              GParamSpec      *pspec,
5134                              EvView          *view)
5135 {
5136         EvDocument *document = ev_document_model_get_document (model);
5137
5138         view->loading = FALSE;
5139
5140         if (document != view->document) {
5141                 clear_caches (view);
5142
5143                 if (view->document) {
5144                         g_object_unref (view->document);
5145                 }
5146
5147                 view->document = document;
5148                 view->find_result = 0;
5149
5150                 if (view->document) {
5151                         g_object_ref (view->document);
5152                         setup_caches (view);
5153                 }
5154
5155                 ev_view_change_page (view,
5156                                      ev_document_model_get_page (model),
5157                                      TRUE);
5158         }
5159 }
5160
5161 static void
5162 ev_view_rotation_changed_cb (EvDocumentModel *model,
5163                              GParamSpec      *pspec,
5164                              EvView          *view)
5165 {
5166         gint rotation = ev_document_model_get_rotation (model);
5167
5168         ev_view_set_rotation (view, rotation);
5169
5170         if (view->pixbuf_cache) {
5171                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5172                 if (!ev_document_is_page_size_uniform (view->document))
5173                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5174                 gtk_widget_queue_resize (GTK_WIDGET (view));
5175         }
5176
5177         ev_view_remove_all (view);
5178
5179         if (rotation != 0)
5180                 clear_selection (view);
5181 }
5182
5183 static void
5184 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
5185                                 GParamSpec      *pspec,
5186                                 EvView          *view)
5187 {
5188         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
5189
5190         ev_view_set_sizing_mode (view, mode);
5191
5192         if (mode != EV_SIZING_FREE)
5193                 gtk_widget_queue_resize (GTK_WIDGET (view));
5194 }
5195
5196 #define EPSILON 0.0000001
5197 static void
5198 ev_view_scale_changed_cb (EvDocumentModel *model,
5199                           GParamSpec      *pspec,
5200                           EvView          *view)
5201 {
5202         gdouble scale = ev_document_model_get_scale (model);
5203
5204         if (ABS (view->scale - scale) < EPSILON)
5205                 return;
5206
5207         if (view->loading_text) {
5208                 cairo_surface_destroy (view->loading_text);
5209                 view->loading_text = NULL;
5210         }
5211
5212         ev_view_set_zoom (view, scale);
5213
5214         view->pending_resize = TRUE;
5215         gtk_widget_queue_resize (GTK_WIDGET (view));
5216 }
5217
5218 static void
5219 ev_view_continuous_changed_cb (EvDocumentModel *model,
5220                                GParamSpec      *pspec,
5221                                EvView          *view)
5222 {
5223         gboolean continuous = ev_document_model_get_continuous (model);
5224
5225         ev_view_set_continuous (view, continuous);
5226         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5227         gtk_widget_queue_resize (GTK_WIDGET (view));
5228 }
5229
5230 static void
5231 ev_view_dual_page_changed_cb (EvDocumentModel *model,
5232                               GParamSpec      *pspec,
5233                               EvView          *view)
5234 {
5235         gboolean dual_page = ev_document_model_get_dual_page (model);
5236
5237         ev_view_set_dual_page (view, dual_page);
5238         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5239         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5240          * preload_cache_size to be 2 if dual_page is set.
5241          */
5242         gtk_widget_queue_resize (GTK_WIDGET (view));
5243 }
5244
5245 static void
5246 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
5247                                GParamSpec      *pspec,
5248                                EvView          *view)
5249 {
5250         gboolean fullscreen = ev_document_model_get_fullscreen (model);
5251
5252         ev_view_set_fullscreen (view, fullscreen);
5253         gtk_widget_queue_resize (GTK_WIDGET (view));
5254 }
5255
5256 void
5257 ev_view_set_model (EvView          *view,
5258                    EvDocumentModel *model)
5259 {
5260         g_return_if_fail (EV_IS_VIEW (view));
5261         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
5262
5263         if (model == view->model)
5264                 return;
5265
5266         if (view->model) {
5267                 g_signal_handlers_disconnect_by_func (view->model,
5268                                                       ev_view_document_changed_cb,
5269                                                       view);
5270                 g_signal_handlers_disconnect_by_func (view->model,
5271                                                       ev_view_page_changed_cb,
5272                                                       view);
5273                 g_object_unref (view->model);
5274         }
5275         view->model = g_object_ref (model);
5276         g_signal_connect (view->model, "notify::document",
5277                           G_CALLBACK (ev_view_document_changed_cb),
5278                           view);
5279         g_signal_connect (view->model, "notify::rotation",
5280                           G_CALLBACK (ev_view_rotation_changed_cb),
5281                           view);
5282         g_signal_connect (view->model, "notify::sizing-mode",
5283                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
5284                           view);
5285         g_signal_connect (view->model, "notify::scale",
5286                           G_CALLBACK (ev_view_scale_changed_cb),
5287                           view);
5288         g_signal_connect (view->model, "notify::continuous",
5289                           G_CALLBACK (ev_view_continuous_changed_cb),
5290                           view);
5291         g_signal_connect (view->model, "notify::dual-page",
5292                           G_CALLBACK (ev_view_dual_page_changed_cb),
5293                           view);
5294         g_signal_connect (view->model, "notify::fullscreen",
5295                           G_CALLBACK (ev_view_fullscreen_changed_cb),
5296                           view);
5297         g_signal_connect (view->model, "page-changed",
5298                           G_CALLBACK (ev_view_page_changed_cb),
5299                           view);
5300 }
5301
5302 static void
5303 ev_view_reload_page (EvView    *view,
5304                      gint       page,
5305                      GdkRegion *region)
5306 {
5307         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5308                                      region,
5309                                      page,
5310                                      view->rotation,
5311                                      view->scale);
5312 }
5313
5314 void
5315 ev_view_reload (EvView *view)
5316 {
5317         ev_pixbuf_cache_clear (view->pixbuf_cache);
5318         view_update_range_and_current_page (view);
5319 }
5320
5321 /*** Zoom and sizing mode ***/
5322
5323 void
5324 ev_view_set_zoom (EvView   *view,
5325                   double    scale)
5326 {
5327         view->scale = scale;
5328
5329         g_object_notify (G_OBJECT (view), "zoom");
5330 }
5331
5332 double
5333 ev_view_get_zoom (EvView *view)
5334 {
5335         return view->scale;
5336 }
5337
5338 gboolean
5339 ev_view_get_continuous (EvView *view)
5340 {
5341         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5342
5343         return view->continuous;
5344 }
5345
5346 void
5347 ev_view_set_continuous (EvView   *view,
5348                         gboolean  continuous)
5349 {
5350         g_return_if_fail (EV_IS_VIEW (view));
5351
5352         view->continuous = continuous;
5353
5354         g_object_notify (G_OBJECT (view), "continuous");
5355 }
5356
5357 gboolean
5358 ev_view_get_dual_page (EvView *view)
5359 {
5360         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5361
5362         return view->dual_page;
5363 }
5364
5365 void
5366 ev_view_set_dual_page (EvView   *view,
5367                        gboolean  dual_page)
5368 {
5369         g_return_if_fail (EV_IS_VIEW (view));
5370
5371         view->dual_page = dual_page;
5372
5373         g_object_notify (G_OBJECT (view), "dual-page");
5374 }
5375
5376 void
5377 ev_view_set_fullscreen (EvView   *view,
5378                          gboolean  fullscreen)
5379 {
5380         g_return_if_fail (EV_IS_VIEW (view));
5381
5382         view->fullscreen = fullscreen;
5383
5384         g_object_notify (G_OBJECT (view), "fullscreen");
5385 }
5386
5387 gboolean
5388 ev_view_get_fullscreen (EvView *view)
5389 {
5390         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5391
5392         return view->fullscreen;
5393 }
5394
5395 void
5396 ev_view_set_presentation (EvView   *view,
5397                           gboolean  presentation)
5398 {
5399         g_return_if_fail (EV_IS_VIEW (view));
5400
5401         presentation = presentation != FALSE;
5402
5403         if (view->presentation == presentation)
5404                 return;
5405
5406         if (!presentation)
5407                 view->presentation_state = EV_PRESENTATION_NORMAL;
5408
5409         view->presentation = presentation;
5410         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5411
5412         if (presentation) {
5413                 view->sizing_mode_saved = view->sizing_mode;
5414                 view->scale_saved = view->scale;
5415                 ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
5416         } else {
5417                 ev_document_model_set_sizing_mode (view->model, view->sizing_mode_saved);
5418                 ev_document_model_set_scale (view->model, view->scale_saved);
5419         }
5420
5421         gtk_widget_queue_resize (GTK_WIDGET (view));
5422
5423         if (presentation)
5424                 ev_view_presentation_transition_start (view);
5425         else {
5426                 ev_view_presentation_transition_stop (view);
5427
5428                 if (view->animation) {
5429                         /* stop any running animation */
5430                         ev_view_transition_animation_cancel (view->animation, view);
5431                 }
5432         }
5433
5434         if (GTK_WIDGET_REALIZED (view)) {
5435                 if (view->presentation)
5436                         gdk_window_set_background (view->layout.bin_window,
5437                                                    &GTK_WIDGET (view)->style->black);
5438                 else
5439                         gdk_window_set_background (view->layout.bin_window,
5440                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
5441         }
5442
5443         g_object_notify (G_OBJECT (view), "presentation");
5444 }
5445
5446 gboolean
5447 ev_view_get_presentation (EvView *view)
5448 {
5449         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5450
5451         return view->presentation;
5452 }
5453
5454 static gboolean
5455 transition_next_page (EvView *view)
5456 {
5457         ev_view_next_page (view);
5458
5459         return FALSE;
5460 }
5461
5462 static void
5463 ev_view_presentation_transition_stop (EvView *view)
5464 {
5465         if (view->trans_timeout_id > 0)
5466                 g_source_remove (view->trans_timeout_id);
5467         view->trans_timeout_id = 0;
5468 }
5469
5470 static void
5471 ev_view_presentation_transition_start (EvView *view)
5472 {
5473         gdouble duration;
5474
5475         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
5476                 return;
5477
5478         ev_view_presentation_transition_stop (view);
5479
5480         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
5481                                                              view->current_page);
5482         if (duration > 0) {
5483                 view->trans_timeout_id =
5484                         g_timeout_add_seconds (duration,
5485                                                (GSourceFunc) transition_next_page,
5486                                                view);
5487         }
5488 }
5489
5490 void
5491 ev_view_set_sizing_mode (EvView       *view,
5492                          EvSizingMode  sizing_mode)
5493 {
5494         view->sizing_mode = sizing_mode;
5495
5496         g_object_notify (G_OBJECT (view), "sizing-mode");
5497 }
5498
5499 EvSizingMode
5500 ev_view_get_sizing_mode (EvView *view)
5501 {
5502         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
5503
5504         return view->sizing_mode;
5505 }
5506
5507 gboolean
5508 ev_view_can_zoom_in (EvView *view)
5509 {
5510         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
5511 }
5512
5513 gboolean
5514 ev_view_can_zoom_out (EvView *view)
5515 {
5516         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
5517 }
5518
5519 void
5520 ev_view_zoom_in (EvView *view)
5521 {
5522         gdouble scale;
5523
5524         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5525
5526         if (view->presentation)
5527                 return;
5528
5529         view->pending_scroll = SCROLL_TO_CENTER;
5530         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
5531         ev_document_model_set_scale (view->model, scale);
5532 }
5533
5534 void
5535 ev_view_zoom_out (EvView *view)
5536 {
5537         gdouble scale;
5538
5539         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5540
5541         if (view->presentation)
5542                 return;
5543
5544         view->pending_scroll = SCROLL_TO_CENTER;
5545         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5546         ev_document_model_set_scale (view->model, scale);
5547 }
5548
5549 void
5550 ev_view_set_rotation (EvView *view, int rotation)
5551 {
5552         view->rotation = rotation;
5553
5554         g_object_notify (G_OBJECT (view), "rotation");
5555 }
5556
5557 int
5558 ev_view_get_rotation (EvView *view)
5559 {
5560         return view->rotation;
5561 }
5562
5563 static double
5564 zoom_for_size_fit_width (gdouble doc_width,
5565                          gdouble doc_height,
5566                          int     target_width,
5567                          int     target_height)
5568 {
5569         double scale;
5570
5571         scale = (double)target_width / doc_width;
5572
5573         if (doc_height * scale > target_height)
5574                 scale = (double)target_width / doc_width;
5575
5576         return scale;
5577 }
5578
5579 static double
5580 zoom_for_size_fit_height (gdouble doc_width,
5581                           gdouble doc_height,
5582                           int     target_width,
5583                           int     target_height)
5584 {
5585         double scale;
5586
5587         scale = (double)target_height / doc_height;
5588
5589         if (doc_width * scale > target_width)
5590                 scale = (double)target_height / doc_height;
5591
5592         return scale;
5593 }
5594
5595 static double
5596 zoom_for_size_best_fit (gdouble doc_width,
5597                         gdouble doc_height,
5598                         int     target_width,
5599                         int     target_height)
5600 {
5601         double w_scale;
5602         double h_scale;
5603
5604         w_scale = (double)target_width / doc_width;
5605         h_scale = (double)target_height / doc_height;
5606
5607         if (doc_height * w_scale > target_height)
5608                 w_scale = (double)target_width / doc_width;
5609         if (doc_width * h_scale > target_width)
5610                 h_scale = (double)target_height / doc_height;
5611
5612         return MIN (w_scale, h_scale);
5613 }
5614
5615
5616 static void
5617 ev_view_zoom_for_size_presentation (EvView *view,
5618                                     int     width,
5619                                     int     height)
5620 {
5621         gdouble doc_width, doc_height;
5622         gdouble scale;
5623
5624         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5625         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5626         ev_document_model_set_scale (view->model, scale);
5627 }
5628
5629 static void
5630 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5631                                                 int     width,
5632                                                 int     height)
5633 {
5634         gdouble doc_width, doc_height;
5635         GtkBorder border;
5636         gdouble scale;
5637
5638         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5639         if (view->rotation == 90 || view->rotation == 270) {
5640                 gdouble tmp;
5641
5642                 tmp = doc_width;
5643                 doc_width = doc_height;
5644                 doc_height = tmp;
5645         }
5646
5647         compute_border (view, doc_width, doc_height, &border);
5648
5649         doc_width *= 2;
5650         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5651         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5652
5653         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5654                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height);
5655         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5656                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5657         else
5658                 g_assert_not_reached ();
5659
5660         ev_document_model_set_scale (view->model, scale);
5661 }
5662
5663 static void
5664 ev_view_zoom_for_size_continuous (EvView *view,
5665                                   int     width,
5666                                   int     height)
5667 {
5668         gdouble doc_width, doc_height;
5669         GtkBorder border;
5670         gdouble scale;
5671
5672         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5673         if (view->rotation == 90 || view->rotation == 270) {
5674                 gdouble tmp;
5675
5676                 tmp = doc_width;
5677                 doc_width = doc_height;
5678                 doc_height = tmp;
5679         }
5680
5681         compute_border (view, doc_width, doc_height, &border);
5682
5683         width -= (border.left + border.right + 2 * view->spacing);
5684         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5685
5686         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5687                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height);
5688         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5689                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5690         else
5691                 g_assert_not_reached ();
5692
5693         ev_document_model_set_scale (view->model, scale);
5694 }
5695
5696 static void
5697 ev_view_zoom_for_size_dual_page (EvView *view,
5698                                  int     width,
5699                                  int     height)
5700 {
5701         GtkBorder border;
5702         gdouble doc_width, doc_height;
5703         gdouble scale;
5704         gint other_page;
5705
5706         other_page = view->current_page ^ 1;
5707
5708         /* Find the largest of the two. */
5709         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5710         if (other_page < ev_document_get_n_pages (view->document)) {
5711                 gdouble width_2, height_2;
5712
5713                 get_doc_page_size (view, other_page, &width_2, &height_2);
5714                 if (width_2 > doc_width)
5715                         doc_width = width_2;
5716                 if (height_2 > doc_height)
5717                         doc_height = height_2;
5718         }
5719         compute_border (view, width, height, &border);
5720
5721         doc_width = doc_width * 2;
5722         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5723         height -= (border.top + border.bottom + 2 * view->spacing);
5724
5725         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5726                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height);
5727         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5728                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5729         else
5730                 g_assert_not_reached ();
5731
5732         ev_document_model_set_scale (view->model, scale);
5733 }
5734
5735 static void
5736 ev_view_zoom_for_size_single_page (EvView *view,
5737                                    int     width,
5738                                    int     height)
5739 {
5740         gdouble doc_width, doc_height;
5741         GtkBorder border;
5742         gdouble scale;
5743
5744         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5745
5746         /* Get an approximate border */
5747         compute_border (view, width, height, &border);
5748
5749         width -= (border.left + border.right + 2 * view->spacing);
5750         height -= (border.top + border.bottom + 2 * view->spacing);
5751
5752         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5753                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height);
5754         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5755                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5756         else
5757                 g_assert_not_reached ();
5758
5759         ev_document_model_set_scale (view->model, scale);
5760 }
5761
5762 static void
5763 ev_view_zoom_for_size (EvView *view,
5764                        int     width,
5765                        int     height)
5766 {
5767         g_return_if_fail (EV_IS_VIEW (view));
5768         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5769                           view->sizing_mode == EV_SIZING_BEST_FIT);
5770         g_return_if_fail (width >= 0);
5771         g_return_if_fail (height >= 0);
5772
5773         if (view->document == NULL)
5774                 return;
5775
5776         if (view->presentation)
5777                 ev_view_zoom_for_size_presentation (view, width, height);
5778         else if (view->continuous && view->dual_page)
5779                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5780         else if (view->continuous)
5781                 ev_view_zoom_for_size_continuous (view, width, height);
5782         else if (view->dual_page)
5783                 ev_view_zoom_for_size_dual_page (view, width, height);
5784         else
5785                 ev_view_zoom_for_size_single_page (view, width, height);
5786 }
5787
5788 /*** Find ***/
5789 static gint
5790 ev_view_find_get_n_results (EvView *view, gint page)
5791 {
5792         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5793 }
5794
5795 static EvRectangle *
5796 ev_view_find_get_result (EvView *view, gint page, gint result)
5797 {
5798         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5799 }
5800
5801 static void
5802 jump_to_find_result (EvView *view)
5803 {
5804         gint n_results;
5805         gint page = view->current_page;
5806
5807         n_results = ev_view_find_get_n_results (view, page);
5808
5809         if (n_results > 0 && view->find_result < n_results) {
5810                 EvRectangle *rect;
5811                 GdkRectangle view_rect;
5812
5813                 rect = ev_view_find_get_result (view, page, view->find_result);
5814                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5815                 ensure_rectangle_is_visible (view, &view_rect);
5816                 view->jump_to_find_result = FALSE;
5817         }
5818 }
5819
5820 /**
5821  * jump_to_find_page
5822  * @view: #EvView instance
5823  * @direction: Direction to look
5824  * @shift: Shift from current page
5825  *
5826  * Jumps to the first page that has occurences of searched word.
5827  * Uses a direction where to look and a shift from current page.
5828  *
5829  */
5830 static void
5831 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5832 {
5833         int n_pages, i;
5834
5835         n_pages = ev_document_get_n_pages (view->document);
5836
5837         for (i = 0; i < n_pages; i++) {
5838                 int page;
5839
5840                 if (direction == EV_VIEW_FIND_NEXT)
5841                         page = view->current_page + i;
5842                 else
5843                         page = view->current_page - i;
5844                 page += shift;
5845
5846                 if (page >= n_pages) {
5847                         page = page - n_pages;
5848                 } else if (page < 0)
5849                         page = page + n_pages;
5850
5851                 if (ev_view_find_get_n_results (view, page) > 0) {
5852                         ev_document_model_set_page (view->model, page);
5853                         break;
5854                 }
5855         }
5856 }
5857
5858 void
5859 ev_view_find_changed (EvView *view, GList **results, gint page)
5860 {
5861         view->find_pages = results;
5862
5863         if (view->jump_to_find_result == TRUE) {
5864                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5865                 jump_to_find_result (view);
5866         }
5867
5868         if (view->current_page == page)
5869                 gtk_widget_queue_draw (GTK_WIDGET (view));
5870 }
5871
5872 void
5873 ev_view_find_next (EvView *view)
5874 {
5875         gint n_results;
5876
5877         n_results = ev_view_find_get_n_results (view, view->current_page);
5878         view->find_result++;
5879
5880         if (view->find_result >= n_results) {
5881                 view->find_result = 0;
5882                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5883                 jump_to_find_result (view);
5884         } else {
5885                 jump_to_find_result (view);
5886                 gtk_widget_queue_draw (GTK_WIDGET (view));
5887         }
5888 }
5889
5890 void
5891 ev_view_find_previous (EvView *view)
5892 {
5893         view->find_result--;
5894
5895         if (view->find_result < 0) {
5896                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5897                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5898                 jump_to_find_result (view);
5899         } else {
5900                 jump_to_find_result (view);
5901                 gtk_widget_queue_draw (GTK_WIDGET (view));
5902         }
5903 }
5904
5905 void
5906 ev_view_find_search_changed (EvView *view)
5907 {
5908         /* search string has changed, focus on new search result */
5909         view->jump_to_find_result = TRUE;
5910         view->find_pages = NULL;
5911 }
5912
5913 void
5914 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5915 {
5916         view->highlight_find_results = value;
5917         gtk_widget_queue_draw (GTK_WIDGET (view));
5918 }
5919
5920 void
5921 ev_view_find_cancel (EvView *view)
5922 {
5923         view->find_pages = NULL;
5924 }
5925
5926 /*** Selections ***/
5927
5928 /* compute_new_selection_rect/text calculates the area currently selected by
5929  * view_rect.  each handles a different mode;
5930  */
5931 static GList *
5932 compute_new_selection_rect (EvView       *view,
5933                             GdkPoint     *start,
5934                             GdkPoint     *stop)
5935 {
5936         GdkRectangle view_rect;
5937         int n_pages, i;
5938         GList *list = NULL;
5939
5940         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5941
5942         view_rect.x = MIN (start->x, stop->x);
5943         view_rect.y = MIN (start->y, stop->y);
5944         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5945         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5946
5947         n_pages = ev_document_get_n_pages (view->document);
5948
5949         for (i = 0; i < n_pages; i++) {
5950                 GdkRectangle page_area;
5951                 GtkBorder border;
5952
5953                 if (get_page_extents (view, i, &page_area, &border)) {
5954                         GdkRectangle overlap;
5955
5956                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5957                                 EvViewSelection *selection;
5958
5959                                 selection = g_new0 (EvViewSelection, 1);
5960                                 selection->page = i;
5961                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5962                                                        &(selection->rect));
5963
5964                                 list = g_list_append (list, selection);
5965                         }
5966                 }
5967         }
5968
5969         return list;
5970 }
5971
5972 static gboolean
5973 gdk_rectangle_point_in (GdkRectangle *rectangle,
5974                         GdkPoint     *point)
5975 {
5976         return rectangle->x <= point->x &&
5977                 rectangle->y <= point->y &&
5978                 point->x < rectangle->x + rectangle->width &&
5979                 point->y < rectangle->y + rectangle->height;
5980 }
5981
5982 static GList *
5983 compute_new_selection_text (EvView          *view,
5984                             EvSelectionStyle style,
5985                             GdkPoint        *start,
5986                             GdkPoint        *stop)
5987 {
5988         int n_pages, i, first, last;
5989         GList *list = NULL;
5990         EvViewSelection *selection;
5991         gdouble width, height;
5992         int start_page, end_page;
5993
5994         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5995
5996         n_pages = ev_document_get_n_pages (view->document);
5997
5998         /* First figure out the range of pages the selection
5999          * affects. */
6000         first = n_pages;
6001         last = 0;
6002         if (view->continuous) {
6003                 start_page = 0;
6004                 end_page = n_pages;
6005         } else if (view->dual_page) {
6006                 start_page = view->start_page;
6007                 end_page = view->end_page + 1;
6008         } else {
6009                 start_page = view->current_page;
6010                 end_page = view->current_page + 1;
6011         }
6012
6013         for (i = start_page; i < end_page; i++) {
6014                 GdkRectangle page_area;
6015                 GtkBorder border;
6016
6017                 get_page_extents (view, i, &page_area, &border);
6018                 if (gdk_rectangle_point_in (&page_area, start) ||
6019                     gdk_rectangle_point_in (&page_area, stop)) {
6020                         if (first == n_pages)
6021                                 first = i;
6022                         last = i;
6023                 }
6024
6025         }
6026
6027         /* Now create a list of EvViewSelection's for the affected
6028          * pages.  This could be an empty list, a list of just one
6029          * page or a number of pages.*/
6030         for (i = first; i < last + 1; i++) {
6031                 GdkRectangle page_area;
6032                 GtkBorder border;
6033                 GdkPoint *point;
6034
6035                 get_doc_page_size (view, i, &width, &height);
6036
6037                 selection = g_new0 (EvViewSelection, 1);
6038                 selection->page = i;
6039                 selection->style = style;
6040                 selection->rect.x1 = selection->rect.y1 = 0;
6041                 selection->rect.x2 = width;
6042                 selection->rect.y2 = height;
6043
6044                 get_page_extents (view, i, &page_area, &border);
6045
6046                 if (gdk_rectangle_point_in (&page_area, start))
6047                         point = start;
6048                 else
6049                         point = stop;
6050
6051                 if (i == first)
6052                         view_point_to_doc_point (view, point, &page_area,
6053                                                  &selection->rect.x1,
6054                                                  &selection->rect.y1);
6055
6056                 /* If the selection is contained within just one page,
6057                  * make sure we don't write 'start' into both points
6058                  * in selection->rect. */
6059                 if (first == last)
6060                         point = stop;
6061
6062                 if (i == last)
6063                         view_point_to_doc_point (view, point, &page_area,
6064                                                  &selection->rect.x2,
6065                                                  &selection->rect.y2);
6066
6067                 list = g_list_append (list, selection);
6068         }
6069
6070         return list;
6071 }
6072
6073 /* This function takes the newly calculated list, and figures out which regions
6074  * have changed.  It then queues a redraw approporiately.
6075  */
6076 static void
6077 merge_selection_region (EvView *view,
6078                         GList  *new_list)
6079 {
6080         GList *old_list;
6081         GList *new_list_ptr, *old_list_ptr;
6082
6083         /* Update the selection */
6084         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
6085         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6086         g_list_free (view->selection_info.selections);
6087         view->selection_info.selections = new_list;
6088         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
6089         g_object_notify (G_OBJECT (view), "has-selection");
6090
6091         new_list_ptr = new_list;
6092         old_list_ptr = old_list;
6093
6094         while (new_list_ptr || old_list_ptr) {
6095                 EvViewSelection *old_sel, *new_sel;
6096                 int cur_page;
6097                 GdkRegion *region = NULL;
6098
6099                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
6100                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
6101
6102                 /* Assume that the lists are in order, and we run through them
6103                  * comparing them, one page at a time.  We come out with the
6104                  * first page we see. */
6105                 if (new_sel && old_sel) {
6106                         if (new_sel->page < old_sel->page) {
6107                                 new_list_ptr = new_list_ptr->next;
6108                                 old_sel = NULL;
6109                         } else if (new_sel->page > old_sel->page) {
6110                                 old_list_ptr = old_list_ptr->next;
6111                                 new_sel = NULL;
6112                         } else {
6113                                 new_list_ptr = new_list_ptr->next;
6114                                 old_list_ptr = old_list_ptr->next;
6115                         }
6116                 } else if (new_sel) {
6117                         new_list_ptr = new_list_ptr->next;
6118                 } else if (old_sel) {
6119                         old_list_ptr = old_list_ptr->next;
6120                 }
6121
6122                 g_assert (new_sel || old_sel);
6123
6124                 /* is the page we're looking at on the screen?*/
6125                 cur_page = new_sel ? new_sel->page : old_sel->page;
6126                 if (cur_page < view->start_page || cur_page > view->end_page)
6127                         continue;
6128
6129                 /* seed the cache with a new page.  We are going to need the new
6130                  * region too. */
6131                 if (new_sel) {
6132                         GdkRegion *tmp_region = NULL;
6133
6134                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
6135                                                                cur_page,
6136                                                                view->scale,
6137                                                                &tmp_region);
6138
6139                         if (tmp_region) {
6140                                 new_sel->covered_region = gdk_region_copy (tmp_region);
6141                         }
6142                 }
6143
6144                 /* Now we figure out what needs redrawing */
6145                 if (old_sel && new_sel) {
6146                         if (old_sel->covered_region && new_sel->covered_region) {
6147                                 /* We only want to redraw the areas that have
6148                                  * changed, so we xor the old and new regions
6149                                  * and redraw if it's different */
6150                                 region = gdk_region_copy (old_sel->covered_region);
6151                                 gdk_region_xor (region, new_sel->covered_region);
6152                                 if (gdk_region_empty (region)) {
6153                                         gdk_region_destroy (region);
6154                                         region = NULL;
6155                                 }
6156                         } else if (old_sel->covered_region) {
6157                                 region = gdk_region_copy (old_sel->covered_region);
6158                         } else if (new_sel->covered_region) {
6159                                 region = gdk_region_copy (new_sel->covered_region);
6160                         }
6161                 } else if (old_sel && !new_sel) {
6162                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
6163                                 region = gdk_region_copy (old_sel->covered_region);
6164                         }
6165                 } else if (!old_sel && new_sel) {
6166                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
6167                                 region = gdk_region_copy (new_sel->covered_region);
6168                         }
6169                 } else {
6170                         g_assert_not_reached ();
6171                 }
6172
6173                 /* Redraw the damaged region! */
6174                 if (region) {
6175                         GdkRectangle page_area;
6176                         GtkBorder border;
6177
6178                         /* I don't know why but the region is smaller
6179                          * than expected. This hack fixes it, I guess
6180                          * 10 pixels more won't hurt
6181                          */
6182                         gdk_region_shrink (region, -5, -5);
6183
6184                         get_page_extents (view, cur_page, &page_area, &border);
6185                         gdk_region_offset (region,
6186                                            page_area.x + border.left - view->scroll_x,
6187                                            page_area.y + border.top - view->scroll_y);
6188                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
6189                         gdk_region_destroy (region);
6190                 }
6191         }
6192
6193         /* Free the old list, now that we're done with it. */
6194         g_list_foreach (old_list, (GFunc) selection_free, NULL);
6195         g_list_free (old_list);
6196 }
6197
6198 static void
6199 compute_selections (EvView          *view,
6200                     EvSelectionStyle style,
6201                     GdkPoint        *start,
6202                     GdkPoint        *stop)
6203 {
6204         GList *list;
6205
6206         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
6207                 list = compute_new_selection_rect (view, start, stop);
6208         else
6209                 list = compute_new_selection_text (view, style, start, stop);
6210         merge_selection_region (view, list);
6211 }
6212
6213 /* Free's the selection.  It's up to the caller to queue redraws if needed.
6214  */
6215 static void
6216 selection_free (EvViewSelection *selection)
6217 {
6218         if (selection->covered_region)
6219                 gdk_region_destroy (selection->covered_region);
6220         g_free (selection);
6221 }
6222
6223 static void
6224 clear_selection (EvView *view)
6225 {
6226         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6227         g_list_free (view->selection_info.selections);
6228         view->selection_info.selections = NULL;
6229         view->selection_info.in_selection = FALSE;
6230         if (view->pixbuf_cache)
6231                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6232         g_object_notify (G_OBJECT (view), "has-selection");
6233 }
6234
6235 void
6236 ev_view_select_all (EvView *view)
6237 {
6238         GList *selections = NULL;
6239         int n_pages, i;
6240
6241         /* Disable selection on rotated pages for the 0.4.0 series */
6242         if (view->rotation != 0)
6243                 return;
6244
6245         clear_selection (view);
6246
6247         n_pages = ev_document_get_n_pages (view->document);
6248         for (i = 0; i < n_pages; i++) {
6249                 gdouble width, height;
6250                 EvViewSelection *selection;
6251
6252                 get_doc_page_size (view, i, &width, &height);
6253
6254                 selection = g_new0 (EvViewSelection, 1);
6255                 selection->page = i;
6256                 selection->style = EV_SELECTION_STYLE_GLYPH;
6257                 selection->rect.x1 = selection->rect.y1 = 0;
6258                 selection->rect.x2 = width;
6259                 selection->rect.y2 = height;
6260
6261                 selections = g_list_append (selections, selection);
6262         }
6263
6264         merge_selection_region (view, selections);
6265         gtk_widget_queue_draw (GTK_WIDGET (view));
6266 }
6267
6268 gboolean
6269 ev_view_get_has_selection (EvView *view)
6270 {
6271         return view->selection_info.selections != NULL;
6272 }
6273
6274 static char *
6275 get_selected_text (EvView *view)
6276 {
6277         GString *text;
6278         GList *l;
6279         gchar *normalized_text;
6280         EvRenderContext *rc;
6281
6282         text = g_string_new (NULL);
6283         rc = ev_render_context_new (NULL, view->rotation, view->scale);
6284
6285         ev_document_doc_mutex_lock ();
6286
6287         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6288                 EvViewSelection *selection = (EvViewSelection *)l->data;
6289                 EvPage *page;
6290                 gchar *tmp;
6291
6292                 page = ev_document_get_page (view->document, selection->page);
6293                 ev_render_context_set_page (rc, page);
6294                 g_object_unref (page);
6295
6296                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6297                                                       rc, selection->style,
6298                                                       &(selection->rect));
6299
6300                 g_string_append (text, tmp);
6301                 g_free (tmp);
6302         }
6303
6304         g_object_unref (rc);
6305
6306         ev_document_doc_mutex_unlock ();
6307
6308         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6309         g_string_free (text, TRUE);
6310         return normalized_text;
6311 }
6312
6313 static void
6314 ev_view_clipboard_copy (EvView      *view,
6315                         const gchar *text)
6316 {
6317         GtkClipboard *clipboard;
6318
6319         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6320                                               GDK_SELECTION_CLIPBOARD);
6321         gtk_clipboard_set_text (clipboard, text, -1);
6322 }
6323
6324 void
6325 ev_view_copy (EvView *ev_view)
6326 {
6327         char *text;
6328
6329         if (!EV_IS_SELECTION (ev_view->document))
6330                 return;
6331
6332         text = get_selected_text (ev_view);
6333         ev_view_clipboard_copy (ev_view, text);
6334         g_free (text);
6335 }
6336
6337 static void
6338 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6339                         GtkSelectionData *selection_data,
6340                         guint             info,
6341                         gpointer          data)
6342 {
6343         EvView *ev_view = EV_VIEW (data);
6344
6345         if (ev_view->link_selected) {
6346                 gtk_selection_data_set_text (selection_data,
6347                                              ev_link_action_get_uri (ev_view->link_selected),
6348                                              -1);
6349         } else if (EV_IS_SELECTION (ev_view->document) &&
6350                    ev_view->selection_info.selections) {
6351                 gchar *text;
6352
6353                 text = get_selected_text (ev_view);
6354                 if (text) {
6355                         gtk_selection_data_set_text (selection_data, text, -1);
6356                         g_free (text);
6357                 }
6358         }
6359 }
6360
6361 static void
6362 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6363                           gpointer      data)
6364 {
6365         EvView *view = EV_VIEW (data);
6366
6367         clear_selection (view);
6368         clear_link_selected (view);
6369 }
6370
6371 static void
6372 ev_view_update_primary_selection (EvView *ev_view)
6373 {
6374         GtkClipboard *clipboard;
6375
6376         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6377                                               GDK_SELECTION_PRIMARY);
6378
6379         if (ev_view->selection_info.selections || ev_view->link_selected) {
6380                 GtkTargetList *target_list;
6381                 GtkTargetEntry *targets;
6382                 int n_targets;
6383
6384                 target_list = gtk_target_list_new (NULL, 0);
6385                 gtk_target_list_add_text_targets (target_list, 0);
6386                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6387                 gtk_target_list_unref (target_list);
6388
6389                 if (!gtk_clipboard_set_with_owner (clipboard,
6390                                                    targets, n_targets,
6391                                                    ev_view_primary_get_cb,
6392                                                    ev_view_primary_clear_cb,
6393                                                    G_OBJECT (ev_view)))
6394                         ev_view_primary_clear_cb (clipboard, ev_view);
6395
6396                 gtk_target_table_free (targets, n_targets);
6397         } else {
6398                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6399                         gtk_clipboard_clear (clipboard);
6400         }
6401 }
6402
6403 static void
6404 clear_link_selected (EvView *view)
6405 {
6406         if (view->link_selected) {
6407                 g_object_unref (view->link_selected);
6408                 view->link_selected = NULL;
6409         }
6410 }
6411
6412 void
6413 ev_view_copy_link_address (EvView       *view,
6414                            EvLinkAction *action)
6415 {
6416         clear_link_selected (view);
6417
6418         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6419
6420         view->link_selected = g_object_ref (action);
6421         ev_view_update_primary_selection (view);
6422 }
6423
6424 /*** Cursor operations ***/
6425
6426 static GdkCursor *
6427 ev_view_create_invisible_cursor(void)
6428 {
6429        GdkBitmap *empty;
6430        GdkColor black = { 0, 0, 0, 0 };
6431        static char bits[] = { 0x00 };
6432
6433        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
6434
6435        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
6436 }
6437
6438 static void
6439 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6440 {
6441         GdkCursor *cursor = NULL;
6442         GdkDisplay *display;
6443         GtkWidget *widget;
6444
6445         if (view->cursor == new_cursor) {
6446                 return;
6447         }
6448
6449         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6450         display = gtk_widget_get_display (widget);
6451         view->cursor = new_cursor;
6452
6453         switch (new_cursor) {
6454                 case EV_VIEW_CURSOR_NORMAL:
6455                         gdk_window_set_cursor (view->layout.bin_window, NULL);
6456                         break;
6457                 case EV_VIEW_CURSOR_IBEAM:
6458                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
6459                         break;
6460                 case EV_VIEW_CURSOR_LINK:
6461                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
6462                         break;
6463                 case EV_VIEW_CURSOR_WAIT:
6464                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
6465                         break;
6466                 case EV_VIEW_CURSOR_HIDDEN:
6467                         cursor = ev_view_create_invisible_cursor ();
6468                         break;
6469                 case EV_VIEW_CURSOR_DRAG:
6470                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
6471                         break;
6472                 case EV_VIEW_CURSOR_AUTOSCROLL:
6473                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
6474                         break;
6475         }
6476
6477         if (cursor) {
6478                 gdk_window_set_cursor (view->layout.bin_window, cursor);
6479                 gdk_cursor_unref (cursor);
6480                 gdk_flush();
6481         }
6482 }
6483
6484 void
6485 ev_view_hide_cursor (EvView *view)
6486 {
6487        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6488 }
6489
6490 void
6491 ev_view_show_cursor (EvView *view)
6492 {
6493        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6494 }
6495
6496 static void
6497 ev_view_reset_presentation_state (EvView *view)
6498 {
6499         if (!view->presentation ||
6500             view->presentation_state == EV_PRESENTATION_NORMAL)
6501                 return;
6502
6503         view->presentation_state = EV_PRESENTATION_NORMAL;
6504         gdk_window_set_background (view->layout.bin_window,
6505                                    &GTK_WIDGET (view)->style->black);
6506         gtk_widget_queue_draw (GTK_WIDGET (view));
6507 }
6508
6509 gboolean
6510 ev_view_next_page (EvView *view)
6511 {
6512         int page, n_pages;
6513
6514         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6515
6516         if (!view->document)
6517                 return FALSE;
6518
6519         if (view->presentation &&
6520             (view->presentation_state == EV_PRESENTATION_BLACK ||
6521              view->presentation_state == EV_PRESENTATION_WHITE)) {
6522                 ev_view_reset_presentation_state (view);
6523                 return FALSE;
6524         }
6525
6526         if (view->animation) {
6527                 ev_view_transition_animation_cancel (view->animation, view);
6528         }
6529
6530         ev_view_presentation_transition_stop (view);
6531         ev_view_reset_presentation_state (view);
6532
6533         page = ev_document_model_get_page (view->model);
6534         n_pages = ev_document_get_n_pages (view->document);
6535
6536         if (view->dual_page && !view->presentation)
6537                 page = page + 2;
6538         else
6539                 page = page + 1;
6540
6541         if (page < n_pages) {
6542                 ev_document_model_set_page (view->model, page);
6543                 return TRUE;
6544         } else if (view->presentation && page == n_pages) {
6545                 view->presentation_state = EV_PRESENTATION_END;
6546                 gtk_widget_queue_draw (GTK_WIDGET (view));
6547                 return TRUE;
6548         } else if (view->dual_page && page == n_pages) {
6549                 ev_document_model_set_page (view->model, page - 1);
6550                 return TRUE;
6551         } else {
6552                 return FALSE;
6553         }
6554 }
6555
6556 gboolean
6557 ev_view_previous_page (EvView *view)
6558 {
6559         int page;
6560
6561         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6562
6563         if (!view->document)
6564                 return FALSE;
6565
6566         if (view->presentation &&
6567             view->presentation_state == EV_PRESENTATION_END) {
6568                 ev_view_reset_presentation_state (view);
6569                 return TRUE;
6570         }
6571
6572         if (view->presentation &&
6573             (view->presentation_state == EV_PRESENTATION_BLACK ||
6574              view->presentation_state == EV_PRESENTATION_WHITE)) {
6575                 ev_view_reset_presentation_state (view);
6576                 return FALSE;
6577         }
6578
6579         if (view->animation) {
6580                 ev_view_transition_animation_cancel (view->animation, view);
6581         }
6582
6583         ev_view_reset_presentation_state (view);
6584
6585         page = ev_document_model_get_page (view->model);
6586
6587         if (view->dual_page && !view->presentation)
6588                 page = page - 2;
6589         else
6590                 page = page - 1;
6591
6592         if (page >= 0) {
6593                 ev_document_model_set_page (view->model, page);
6594                 return TRUE;
6595         } else if (ev_view_get_dual_page (view) && page == -1) {
6596                 ev_document_model_set_page (view->model, 0);
6597                 return TRUE;
6598         } else {
6599                 return FALSE;
6600         }
6601 }
6602