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