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       scroll_to_current_page                     (EvView *view,
  91                                                               GtkOrientation orientation);
  92 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  93                                                               GtkAdjustment      *hadjustment,
  94                                                               GtkAdjustment      *vadjustment);
  95 static void       view_update_range_and_current_page         (EvView             *view);
  96 static void       set_scroll_adjustment                      (EvView             *view,
  97                                                               GtkOrientation      orientation,
  98                                                               GtkAdjustment      *adjustment);
  99 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 100                                                               guint               keyval,
 101                                                               GdkModifierType modifiers,
 102                                                               GtkScrollType       scroll,
 103                                                               gboolean            horizontal);
 104 static void       ensure_rectangle_is_visible                (EvView             *view,
 105                                                               GdkRectangle       *rect);
 106
 107 /*** Geometry computations ***/
 108 static void       compute_border                             (EvView             *view,
 109                                                               int                 width,
 110                                                               int                 height,
 111                                                               GtkBorder          *border);
 112 static void       get_page_y_offset                          (EvView             *view,
 113                                                               int                 page,
 114                                                               int                *y_offset);
 115 static gboolean   get_page_extents                           (EvView             *view,
 116                                                               gint                page,
 117                                                               GdkRectangle       *page_area,
 118                                                               GtkBorder          *border);
 119 static void       view_rect_to_doc_rect                      (EvView             *view,
 120                                                               GdkRectangle       *view_rect,
 121                                                               GdkRectangle       *page_area,
 122                                                               EvRectangle        *doc_rect);
 123 static void       doc_rect_to_view_rect                      (EvView             *view,
 124                                                               int                 page,
 125                                                               EvRectangle        *doc_rect,
 126                                                               GdkRectangle       *view_rect);
 127 static gboolean   get_dual_even_left                         (EvView             *view);
 128 static void       find_page_at_location                      (EvView             *view,
 129                                                               gdouble             x,
 130                                                               gdouble             y,
 131                                                               gint               *page,
 132                                                               gint               *x_offset,
 133                                                               gint               *y_offset);
 134 static gboolean  doc_point_to_view_point                     (EvView             *view,
 135                                                               int                 page,
 136                                                               EvPoint            *doc_point,
 137                                                               GdkPoint           *view_point);
 138 /*** Hyperrefs ***/
 139 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 140                                                               gdouble             x,
 141                                                               gdouble             y);
 142 static char*      tip_from_link                              (EvView             *view,
 143                                                               EvLink             *link);
 144 /*** Forms ***/
 145 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 146                                                                gdouble            x,
 147                                                                gdouble            y);
 148
 149 /*** Annotations ***/
 150 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 151                                                               gdouble             x,
 152                                                               gdouble             y);
 153 static void          show_annotation_windows                 (EvView             *view,
 154                                                               gint                page);
 155 static void          hide_annotation_windows                 (EvView             *view,
 156                                                               gint                page);
 157 /*** GtkWidget implementation ***/
 158 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 159                                                               GtkRequisition     *requisition);
 160 static void       ev_view_size_request_continuous            (EvView             *view,
 161                                                               GtkRequisition     *requisition);
 162 static void       ev_view_size_request_dual_page             (EvView             *view,
 163                                                               GtkRequisition     *requisition);
 164 static void       ev_view_size_request_single_page           (EvView             *view,
 165                                                               GtkRequisition     *requisition);
 166 static void       ev_view_size_request                       (GtkWidget          *widget,
 167                                                               GtkRequisition     *requisition);
 168 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 169                                                               GtkAllocation      *allocation);
 170 static void       ev_view_realize                            (GtkWidget          *widget);
 171 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 172                                                               GdkEventScroll     *event);
 173 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 174                                                               GdkEventExpose     *event);
 175 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 176 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 177                                                               GdkEventButton     *event);
 178 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 179                                                               GdkEventMotion     *event);
 180 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 181                                                               GdkEventButton     *event);
 182 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 183                                                               GdkEventCrossing   *event);
 184 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 185                                                               GdkEventCrossing   *event);
 186 static void       ev_view_style_set                          (GtkWidget          *widget,
 187                                                               GtkStyle           *old_style);
 188 static void       ev_view_remove_all                         (EvView             *view);
 189
 190 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 191
 192 /*** Drawing ***/
 193 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 194 static void       draw_rubberband                            (GtkWidget          *widget,
 195                                                               GdkWindow          *window,
 196                                                               const GdkRectangle *rect,
 197                                                               guchar              alpha);
 198 static void       highlight_find_results                     (EvView             *view,
 199                                                               int                 page);
 200 static void       draw_one_page                              (EvView             *view,
 201                                                               gint                page,
 202                                                               cairo_t            *cr,
 203                                                               GdkRectangle       *page_area,
 204                                                               GtkBorder          *border,
 205                                                               GdkRectangle       *expose_area,
 206                                                               gboolean           *page_ready);
 207 static void       draw_loading_text                          (EvView             *view,
 208                                                               GdkRectangle       *page_area,
 209                                                               GdkRectangle       *expose_area);
 210 static void       ev_view_reload_page                        (EvView             *view,
 211                                                               gint                page,
 212                                                               GdkRegion          *region);
 213
 214 /*** Callbacks ***/
 215 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 216                                                               GdkRegion          *region,
 217                                                               EvView             *view);
 218 static void       ev_view_page_changed_cb                    (EvDocumentModel    *model,
 219                                                               gint                old_page,
 220                                                               gint                new_page,
 221                                                               EvView             *view);
 222 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 223                                                               EvView             *view);
 224
 225 /*** GObject ***/
 226 static void       ev_view_finalize                           (GObject            *object);
 227 static void       ev_view_destroy                            (GtkObject          *object);
 228 static void       ev_view_set_property                       (GObject            *object,
 229                                                               guint               prop_id,
 230                                                               const GValue       *value,
 231                                                               GParamSpec         *pspec);
 232 static void       ev_view_get_property                       (GObject            *object,
 233                                                               guint               prop_id,
 234                                                               GValue             *value,
 235                                                               GParamSpec         *pspec);
 236 static void       ev_view_class_init                         (EvViewClass        *class);
 237 static void       ev_view_init                               (EvView             *view);
 238
 239 /*** Zoom and sizing ***/
 240 static double   zoom_for_size_fit_width                      (gdouble doc_width,
 241                                                               gdouble doc_height,
 242                                                               int     target_width,
 243                                                               int     target_height);
 244 static double   zoom_for_size_fit_height                     (gdouble doc_width,
 245                                                               gdouble doc_height,
 246                                                               int     target_width,
 247                                                               int     target_height);
 248 static double   zoom_for_size_best_fit                       (gdouble doc_width,
 249                                                               gdouble doc_height,
 250                                                               int     target_width,
 251                                                               int     target_height);
 252 static void     ev_view_zoom_for_size                        (EvView *view,
 253                                                               int     width,
 254                                                               int     height);
 255 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 256                                                               int     width,
 257                                                               int     height);
 258 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 259                                                                 int     width,
 260                                                                 int     height);
 261 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 262                                                                 int     width,
 263                                                                 int     height);
 264 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 265                                                                 int     width,
 266                                                                 int     height);
 267 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 268                                                                 int     width,
 269                                                                 int     height);
 270 /*** Cursors ***/
 271 static GdkCursor* ev_view_create_invisible_cursor            (void);
 272 static void       ev_view_set_cursor                         (EvView             *view,
 273                                                               EvViewCursor        new_cursor);
 274 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 275                                                               gint x,
 276                                                               gint y);
 277
 278 /*** Find ***/
 279 static gint         ev_view_find_get_n_results               (EvView             *view,
 280                                                               gint                page);
 281 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 282                                                               gint                page,
 283                                                               gint                result);
 284 static void       jump_to_find_result                        (EvView             *view);
 285 static void       jump_to_find_page                          (EvView             *view,
 286                                                               EvViewFindDirection direction,
 287                                                               gint                shift);
 288
 289 /*** Selection ***/
 290 static void       compute_selections                         (EvView             *view,
 291                                                               EvSelectionStyle    style,
 292                                                               GdkPoint           *start,
 293                                                               GdkPoint           *stop);
 294 static void       clear_selection                            (EvView             *view);
 295 static void       clear_link_selected                        (EvView             *view);
 296 static void       selection_free                             (EvViewSelection    *selection);
 297 static char*      get_selected_text                          (EvView             *ev_view);
 298 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 299                                                               GtkSelectionData   *selection_data,
 300                                                               guint               info,
 301                                                               gpointer            data);
 302 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 303                                                               gpointer            data);
 304 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 305
 306 /*** Presentation ***/
 307 static void       ev_view_presentation_transition_start      (EvView             *ev_view);
 308 static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
 309
 310
 311 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 312
 313 /* HeightToPage cache */
 314 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 315
 316 static void
 317 build_height_to_page (EvHeightToPageCache *cache,
 318                       EvDocument          *document,
 319                       gint                 rotation)
 320 {
 321         gboolean swap, uniform, dual_even_left;
 322         int i;
 323         double uniform_height, page_height, next_page_height;
 324         double saved_height;
 325         gdouble u_width, u_height;
 326         gint n_pages;
 327
 328         swap = (rotation == 90 || rotation == 270);
 329
 330         uniform = ev_document_is_page_size_uniform (document);
 331         n_pages = ev_document_get_n_pages (document);
 332         dual_even_left = (n_pages > 2);
 333
 334         g_free (cache->height_to_page);
 335         g_free (cache->dual_height_to_page);
 336
 337         cache->rotation = rotation;
 338         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 339         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 340
 341         if (uniform)
 342                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 343
 344         saved_height = 0;
 345         for (i = 0; i <= n_pages; i++) {
 346                 if (uniform) {
 347                         uniform_height = swap ? u_width : u_height;
 348                         cache->height_to_page[i] = i * uniform_height;
 349                 } else {
 350                         if (i < n_pages) {
 351                                 gdouble w, h;
 352
 353                                 ev_document_get_page_size (document, i, &w, &h);
 354                                 page_height = swap ? w : h;
 355                         } else {
 356                                 page_height = 0;
 357                         }
 358                         cache->height_to_page[i] = saved_height;
 359                         saved_height += page_height;
 360                 }
 361         }
 362
 363         if (dual_even_left && !uniform) {
 364                 gdouble w, h;
 365
 366                 ev_document_get_page_size (document, 0, &w, &h);
 367                 saved_height = swap ? w : h;
 368         } else {
 369                 saved_height = 0;
 370         }
 371
 372         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 373                 if (uniform) {
 374                         uniform_height = swap ? u_width : u_height;
 375                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 376                         if (i + 1 < n_pages + 2)
 377                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 378                 } else {
 379                         if (i + 1 < n_pages) {
 380                                 gdouble w, h;
 381
 382                                 ev_document_get_page_size (document, i + 1, &w, &h);
 383                                 next_page_height = swap ? w : h;
 384                         } else {
 385                                 next_page_height = 0;
 386                         }
 387
 388                         if (i < n_pages) {
 389                                 gdouble w, h;
 390
 391                                 ev_document_get_page_size (document, i, &w, &h);
 392                                 page_height = swap ? w : h;
 393                         } else {
 394                                 page_height = 0;
 395                         }
 396
 397                         if (i + 1 < n_pages + 2) {
 398                                 cache->dual_height_to_page[i] = saved_height;
 399                                 cache->dual_height_to_page[i + 1] = saved_height;
 400                                 saved_height += MAX(page_height, next_page_height);
 401                         } else {
 402                                 cache->dual_height_to_page[i] = saved_height;
 403                         }
 404                 }
 405         }
 406 }
 407
 408 static void
 409 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 410                                     EvDocument          *document,
 411                                     gint                 page,
 412                                     gint                 rotation,
 413                                     gdouble             *height,
 414                                     gdouble             *dual_height)
 415 {
 416         if (cache->rotation != rotation)
 417                 build_height_to_page (cache, document, rotation);
 418
 419         *height = cache->height_to_page[page];
 420         *dual_height = cache->dual_height_to_page[page];
 421 }
 422
 423 static void
 424 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 425 {
 426         if (cache->height_to_page) {
 427                 g_free (cache->height_to_page);
 428                 cache->height_to_page = NULL;
 429         }
 430
 431         if (cache->dual_height_to_page) {
 432                 g_free (cache->dual_height_to_page);
 433                 cache->dual_height_to_page = NULL;
 434         }
 435         g_free (cache);
 436 }
 437
 438 static EvHeightToPageCache *
 439 ev_view_get_height_to_page_cache (EvView *view)
 440 {
 441         EvHeightToPageCache *cache;
 442
 443         if (!view->document)
 444                 return NULL;
 445
 446         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 447         if (!cache) {
 448                 cache = g_new0 (EvHeightToPageCache, 1);
 449                 build_height_to_page (cache, view->document, view->rotation);
 450                 g_object_set_data_full (G_OBJECT (view->document),
 451                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 452                                         cache,
 453                                         (GDestroyNotify)ev_height_to_page_cache_free);
 454         }
 455
 456         return cache;
 457 }
 458
 459 static void
 460 ev_view_get_height_to_page (EvView *view,
 461                             gint    page,
 462                             gint   *height,
 463                             gint   *dual_height)
 464 {
 465         gdouble h, dh;
 466
 467         if (!view->height_to_page_cache)
 468                 return;
 469
 470         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 471                                             view->document,
 472                                             page,
 473                                             view->rotation,
 474                                             &h, &dh);
 475         if (height)
 476                 *height = (gint)(h * view->scale + 0.5);
 477
 478         if (dual_height)
 479                 *dual_height = (gint)(dh * view->scale + 0.5);
 480 }
 481
 482 static void
 483 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 484 {
 485         GdkPoint view_point;
 486
 487         if (view->document == NULL) {
 488                 return;
 489         }
 490
 491         doc_point_to_view_point (view, view->current_page, &view->pending_point, &view_point);
 492
 493         if (orientation == GTK_ORIENTATION_VERTICAL) {
 494                 view->pending_point.y = 0;
 495         } else {
 496                 view->pending_point.x = 0;
 497         }
 498
 499         if (orientation == GTK_ORIENTATION_VERTICAL) {
 500                 if (view->continuous) {
 501                         gtk_adjustment_clamp_page (view->vadjustment,
 502                                                    view_point.y - view->spacing / 2,
 503                                                    view_point.y + view->vadjustment->page_size);
 504                 } else {
 505                         gtk_adjustment_set_value (view->vadjustment,
 506                                                   CLAMP (view_point.y,
 507                                                   view->vadjustment->lower,
 508                                                   view->vadjustment->upper -
 509                                                   view->vadjustment->page_size));
 510                 }
 511         } else {
 512                 if (view->dual_page) {
 513                         gtk_adjustment_clamp_page (view->hadjustment,
 514                                                    view_point.x,
 515                                                    view_point.x + view->hadjustment->page_size);
 516                 } else {
 517                         gtk_adjustment_set_value (view->hadjustment,
 518                                                   CLAMP (view_point.x,
 519                                                   view->hadjustment->lower,
 520                                                   view->hadjustment->upper -
 521                                                   view->hadjustment->page_size));
 522                 }
 523         }
 524 }
 525
 526 static void
 527 view_set_adjustment_values (EvView         *view,
 528                             GtkOrientation  orientation)
 529 {
 530         GtkWidget *widget = GTK_WIDGET (view);
 531         GtkAdjustment *adjustment;
 532         int requisition;
 533         int allocation;
 534
 535         double factor;
 536         gint new_value;
 537
 538         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 539                 requisition = widget->requisition.width;
 540                 allocation = widget->allocation.width;
 541                 adjustment = view->hadjustment;
 542         } else {
 543                 requisition = widget->requisition.height;
 544                 allocation = widget->allocation.height;
 545                 adjustment = view->vadjustment;
 546         }
 547
 548         if (!adjustment)
 549                 return;
 550
 551         factor = 1.0;
 552         switch (view->pending_scroll) {
 553                 case SCROLL_TO_KEEP_POSITION:
 554                 case SCROLL_TO_FIND_LOCATION:
 555                         factor = (adjustment->value) / adjustment->upper;
 556                         break;
 557                 case SCROLL_TO_PAGE_POSITION:
 558                         break;
 559                 case SCROLL_TO_CENTER:
 560                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 561                         break;
 562         }
 563
 564         adjustment->page_size = allocation;
 565         adjustment->step_increment = allocation * 0.1;
 566         adjustment->page_increment = allocation * 0.9;
 567         adjustment->lower = 0;
 568         adjustment->upper = MAX (allocation, requisition);
 569
 570         /*
 571          * We add 0.5 to the values before to average out our rounding errors.
 572          */
 573         switch (view->pending_scroll) {
 574                 case SCROLL_TO_KEEP_POSITION:
 575                 case SCROLL_TO_FIND_LOCATION:
 576                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 577                         gtk_adjustment_set_value (adjustment, (int)new_value);
 578                         break;
 579                 case SCROLL_TO_PAGE_POSITION:
 580                         scroll_to_current_page (view, orientation);
 581                         break;
 582                 case SCROLL_TO_CENTER:
 583                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 584                                            0, adjustment->upper - adjustment->page_size);
 585                         gtk_adjustment_set_value (adjustment, (int)new_value);
 586                         break;
 587         }
 588
 589         gtk_adjustment_changed (adjustment);
 590 }
 591
 592 static void
 593 view_update_range_and_current_page (EvView *view)
 594 {
 595         gint current_page;
 596         gint best_current_page = -1;
 597         gint start = view->start_page;
 598         gint end = view->end_page;
 599
 600         /* Presentation trumps all other modes */
 601         if (view->presentation) {
 602                 view->start_page = view->current_page;
 603                 view->end_page = view->current_page;
 604         } else if (view->continuous) {
 605                 GdkRectangle current_area, unused, page_area;
 606                 GtkBorder border;
 607                 gboolean found = FALSE;
 608                 gint area_max = -1, area;
 609                 int i;
 610
 611                 if (!(view->vadjustment && view->hadjustment))
 612                         return;
 613
 614                 current_area.x = view->hadjustment->value;
 615                 current_area.width = view->hadjustment->upper;
 616                 current_area.y = view->vadjustment->value;
 617                 current_area.height = view->vadjustment->page_size;
 618
 619                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 620
 621                         get_page_extents (view, i, &page_area, &border);
 622
 623                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 624                                 area = unused.width * unused.height;
 625
 626                                 if (!found) {
 627                                         area_max = area;
 628                                         view->start_page = i;
 629                                         found = TRUE;
 630                                         best_current_page = i;
 631                                 }
 632                                 if (area > area_max) {
 633                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 634                                         area_max = area;
 635                                 }
 636
 637                                 view->end_page = i;
 638                         } else if (found && view->current_page <= view->end_page) {
 639                                 break;
 640                         }
 641                 }
 642
 643         } else if (view->dual_page) {
 644                 if (view->current_page % 2 == get_dual_even_left (view)) {
 645                         view->start_page = view->current_page;
 646                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 647                                 view->end_page = view->start_page + 1;
 648                         else
 649                                 view->end_page = view->start_page;
 650                 } else {
 651                         if (view->current_page < 1)
 652                                 view->start_page = view->current_page;
 653                         else
 654                                 view->start_page = view->current_page - 1;
 655                         view->end_page = view->current_page;
 656                 }
 657         } else {
 658                 view->start_page = view->current_page;
 659                 view->end_page = view->current_page;
 660         }
 661
 662         best_current_page = MAX (best_current_page, view->start_page);
 663         current_page = ev_document_model_get_page (view->model);
 664
 665         if ((current_page != best_current_page) && (view->pending_scroll == SCROLL_TO_KEEP_POSITION)) {
 666                 view->current_page = best_current_page;
 667                 ev_document_model_set_page (view->model, best_current_page);
 668         }
 669
 670         if (start != view->start_page || end != view->end_page) {
 671                 gint i;
 672
 673                 for (i = start; i < view->start_page; i++) {
 674                         hide_annotation_windows (view, i);
 675                 }
 676
 677                 for (i = end; i > view->end_page; i--) {
 678                         hide_annotation_windows (view, i);
 679                 }
 680         }
 681
 682         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 683                                         view->start_page,
 684                                         view->end_page,
 685                                         view->rotation,
 686                                         view->scale,
 687                                         view->selection_info.selections);
 688 }
 689
 690 static void
 691 set_scroll_adjustment (EvView *view,
 692                        GtkOrientation  orientation,
 693                        GtkAdjustment  *adjustment)
 694 {
 695         GtkAdjustment **to_set;
 696
 697         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 698                 to_set = &view->hadjustment;
 699         else
 700                 to_set = &view->vadjustment;
 701
 702         if (*to_set != adjustment) {
 703                 if (*to_set) {
 704                         g_signal_handlers_disconnect_by_func (*to_set,
 705                                                               (gpointer) on_adjustment_value_changed,
 706                                                               view);
 707                         g_object_unref (*to_set);
 708                 }
 709
 710                 *to_set = adjustment;
 711                 view_set_adjustment_values (view, orientation);
 712
 713                 if (*to_set) {
 714                         g_object_ref (*to_set);
 715                         g_signal_connect (*to_set, "value_changed",
 716                                           G_CALLBACK (on_adjustment_value_changed), view);
 717                 }
 718         }
 719 }
 720
 721 static void
 722 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 723                                 GtkAdjustment  *hadjustment,
 724                                 GtkAdjustment  *vadjustment)
 725 {
 726         EvView *view = EV_VIEW (layout);
 727
 728         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 729         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 730
 731         on_adjustment_value_changed (NULL, view);
 732 }
 733
 734 static void
 735 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 736                            guint           keyval,
 737                            GdkModifierType modifiers,
 738                            GtkScrollType   scroll,
 739                            gboolean        horizontal)
 740 {
 741   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 742
 743   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 744                                 "binding_activated", 2,
 745                                 GTK_TYPE_SCROLL_TYPE, scroll,
 746                                 G_TYPE_BOOLEAN, horizontal);
 747   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 748                                 "binding_activated", 2,
 749                                 GTK_TYPE_SCROLL_TYPE, scroll,
 750                                 G_TYPE_BOOLEAN, horizontal);
 751 }
 752
 753 void
 754 ev_view_scroll (EvView        *view,
 755                 GtkScrollType  scroll,
 756                 gboolean       horizontal)
 757 {
 758         GtkAdjustment *adjustment;
 759         double value, increment;
 760         gboolean first_page = FALSE;
 761         gboolean last_page = FALSE;
 762
 763         view->jump_to_find_result = FALSE;
 764
 765         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 766                 switch (scroll) {
 767                         case GTK_SCROLL_PAGE_BACKWARD:
 768                         case GTK_SCROLL_STEP_BACKWARD:
 769                                 ev_view_previous_page (view);
 770                                 break;
 771                         case GTK_SCROLL_PAGE_FORWARD:
 772                         case GTK_SCROLL_STEP_FORWARD:
 773                                 ev_view_next_page (view);
 774                                 break;
 775                         default:
 776                                 break;
 777                 }
 778                 return;
 779         }
 780
 781         /* Assign values for increment and vertical adjustment */
 782         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 783         increment = adjustment->page_size * 0.75;
 784         value = adjustment->value;
 785
 786         /* Assign boolean for first and last page */
 787         if (view->current_page == 0)
 788                 first_page = TRUE;
 789         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 790                 last_page = TRUE;
 791
 792         switch (scroll) {
 793                 case GTK_SCROLL_PAGE_BACKWARD:
 794                         /* Do not jump backwards if at the first page */
 795                         if (value == (adjustment->lower) && first_page) {
 796                                 /* Do nothing */
 797                                 /* At the top of a page, assign the upper bound limit of previous page */
 798                         } else if (value == (adjustment->lower)) {
 799                                 value = adjustment->upper - adjustment->page_size;
 800                                 ev_view_previous_page (view);
 801                                 /* Jump to the top */
 802                         } else {
 803                                 value = MAX (value - increment, adjustment->lower);
 804                         }
 805                         break;
 806                 case GTK_SCROLL_PAGE_FORWARD:
 807                         /* Do not jump forward if at the last page */
 808                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 809                                 /* Do nothing */
 810                         /* At the bottom of a page, assign the lower bound limit of next page */
 811                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 812                                 value = 0;
 813                                 ev_view_next_page (view);
 814                         /* Jump to the bottom */
 815                         } else {
 816                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 817                         }
 818                         break;
 819                 case GTK_SCROLL_STEP_BACKWARD:
 820                         value -= adjustment->step_increment;
 821                         break;
 822                 case GTK_SCROLL_STEP_FORWARD:
 823                         value += adjustment->step_increment;
 824                         break;
 825                 case GTK_SCROLL_STEP_DOWN:
 826                         value -= adjustment->step_increment / 10;
 827                         break;
 828                 case GTK_SCROLL_STEP_UP:
 829                         value += adjustment->step_increment / 10;
 830                         break;
 831                 default:
 832                         break;
 833         }
 834
 835         value = CLAMP (value, adjustment->lower,
 836                        adjustment->upper - adjustment->page_size);
 837
 838         gtk_adjustment_set_value (adjustment, value);
 839 }
 840
 841 #define MARGIN 5
 842
 843 static void
 844 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 845 {
 846         GtkWidget *widget = GTK_WIDGET (view);
 847         GtkAdjustment *adjustment;
 848         int value;
 849
 850         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 851
 852         adjustment = view->vadjustment;
 853
 854         if (rect->y < adjustment->value) {
 855                 value = MAX (adjustment->lower, rect->y - MARGIN);
 856                 gtk_adjustment_set_value (view->vadjustment, value);
 857         } else if (rect->y + rect->height >
 858                    adjustment->value + widget->allocation.height) {
 859                 value = MIN (adjustment->upper, rect->y + rect->height -
 860                              widget->allocation.height + MARGIN);
 861                 gtk_adjustment_set_value (view->vadjustment, value);
 862         }
 863
 864         adjustment = view->hadjustment;
 865
 866         if (rect->x < adjustment->value) {
 867                 value = MAX (adjustment->lower, rect->x - MARGIN);
 868                 gtk_adjustment_set_value (view->hadjustment, value);
 869         } else if (rect->x + rect->height >
 870                    adjustment->value + widget->allocation.width) {
 871                 value = MIN (adjustment->upper, rect->x + rect->width -
 872                              widget->allocation.width + MARGIN);
 873                 gtk_adjustment_set_value (view->hadjustment, value);
 874         }
 875
 876         gtk_widget_queue_resize (GTK_WIDGET (view));
 877 }
 878
 879 /*** Geometry computations ***/
 880
 881 static void
 882 compute_border (EvView *view, int width, int height, GtkBorder *border)
 883 {
 884         if (view->presentation) {
 885                 border->left = 0;
 886                 border->right = 0;
 887                 border->top = 0;
 888                 border->bottom = 0;
 889         } else {
 890                 ev_document_misc_get_page_border_size (width, height, border);
 891         }
 892 }
 893
 894 void
 895 _get_page_size_for_scale_and_rotation (EvDocument *document,
 896                                        gint        page,
 897                                        gdouble     scale,
 898                                        gint        rotation,
 899                                        gint       *page_width,
 900                                        gint       *page_height)
 901 {
 902         gdouble w, h;
 903         gint    width, height;
 904
 905         ev_document_get_page_size (document, page, &w, &h);
 906
 907         width = (gint)(w * scale + 0.5);
 908         height = (gint)(h * scale + 0.5);
 909
 910         if (page_width)
 911                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
 912         if (page_height)
 913                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
 914 }
 915
 916 static void
 917 ev_view_get_page_size (EvView *view,
 918                        gint    page,
 919                        gint   *page_width,
 920                        gint   *page_height)
 921 {
 922         _get_page_size_for_scale_and_rotation (view->document,
 923                                                page,
 924                                                view->scale,
 925                                                view->rotation,
 926                                                page_width,
 927                                                page_height);
 928 }
 929
 930 static void
 931 ev_view_get_max_page_size (EvView *view,
 932                            gint   *max_width,
 933                            gint   *max_height)
 934 {
 935         double w, h;
 936         gint   width, height;
 937
 938         ev_document_get_max_page_size (view->document, &w, &h);
 939
 940         width = (gint)(w * view->scale + 0.5);
 941         height = (gint)(h * view->scale + 0.5);
 942
 943         if (max_width)
 944                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
 945         if (max_height)
 946                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
 947 }
 948
 949 static void
 950 get_page_y_offset (EvView *view, int page, int *y_offset)
 951 {
 952         int max_width, offset;
 953         GtkBorder border;
 954
 955         g_return_if_fail (y_offset != NULL);
 956
 957         ev_view_get_max_page_size (view, &max_width, NULL);
 958         compute_border (view, max_width, max_width, &border);
 959
 960         if (view->dual_page) {
 961                 ev_view_get_height_to_page (view, page, NULL, &offset);
 962                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
 963                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
 964         } else {
 965                 ev_view_get_height_to_page (view, page, &offset, NULL);
 966                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 967         }
 968
 969         *y_offset = offset;
 970         return;
 971 }
 972
 973 static gboolean
 974 get_page_extents (EvView       *view,
 975                   gint          page,
 976                   GdkRectangle *page_area,
 977                   GtkBorder    *border)
 978 {
 979         GtkWidget *widget;
 980         int width, height;
 981
 982         widget = GTK_WIDGET (view);
 983
 984         /* Get the size of the page */
 985         ev_view_get_page_size (view, page, &width, &height);
 986         compute_border (view, width, height, border);
 987         page_area->width = width + border->left + border->right;
 988         page_area->height = height + border->top + border->bottom;
 989
 990         if (view->presentation) {
 991                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 992                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 993         } else if (view->continuous) {
 994                 gint max_width;
 995                 gint x, y;
 996
 997                 ev_view_get_max_page_size (view, &max_width, NULL);
 998                 max_width = max_width + border->left + border->right;
 999                 /* Get the location of the bounding box */
1000                 if (view->dual_page) {
1001                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1002                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1003                         if (page % 2 == get_dual_even_left (view))
1004                                 x = x + (max_width - width - border->left - border->right);
1005                 } else {
1006                         x = view->spacing;
1007                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
1008                 }
1009
1010                 get_page_y_offset (view, page, &y);
1011
1012                 page_area->x = x;
1013                 page_area->y = y;
1014         } else {
1015                 gint x, y;
1016                 if (view->dual_page) {
1017                         gint width_2, height_2;
1018                         gint max_width = width;
1019                         gint max_height = height;
1020                         GtkBorder overall_border;
1021                         gint other_page;
1022
1023                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1024
1025                         /* First, we get the bounding box of the two pages */
1026                         if (other_page < ev_document_get_n_pages (view->document)
1027                             && (0 <= other_page)) {
1028                                 ev_view_get_page_size (view, other_page,
1029                                                        &width_2, &height_2);
1030                                 if (width_2 > width)
1031                                         max_width = width_2;
1032                                 if (height_2 > height)
1033                                         max_height = height_2;
1034                         }
1035                         compute_border (view, max_width, max_height, &overall_border);
1036
1037                         /* Find the offsets */
1038                         x = view->spacing;
1039                         y = view->spacing;
1040
1041                         /* Adjust for being the left or right page */
1042                         if (page % 2 == get_dual_even_left (view))
1043                                 x = x + max_width - width;
1044                         else
1045                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1046
1047                         y = y + (max_height - height)/2;
1048
1049                         /* Adjust for extra allocation */
1050                         x = x + MAX (0, widget->allocation.width -
1051                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1052                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
1053                 } else {
1054                         x = view->spacing;
1055                         y = view->spacing;
1056
1057                         /* Adjust for extra allocation */
1058                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1059                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1060                 }
1061
1062                 page_area->x = x;
1063                 page_area->y = y;
1064         }
1065
1066         return TRUE;
1067 }
1068
1069 static void
1070 get_doc_page_size (EvView  *view,
1071                    gint     page,
1072                    gdouble *width,
1073                    gdouble *height)
1074 {
1075         double w, h;
1076
1077         ev_document_get_page_size (view->document, page, &w, &h);
1078         if (view->rotation == 0 || view->rotation == 180) {
1079                 if (width) *width = w;
1080                 if (height) *height = h;
1081         } else {
1082                 if (width) *width = h;
1083                 if (height) *height = w;
1084         }
1085 }
1086
1087 static void
1088 view_point_to_doc_point (EvView *view,
1089                          GdkPoint *view_point,
1090                          GdkRectangle *page_area,
1091                          double  *doc_point_x,
1092                          double  *doc_point_y)
1093 {
1094         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1095         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1096 }
1097
1098 static void
1099 view_rect_to_doc_rect (EvView *view,
1100                        GdkRectangle *view_rect,
1101                        GdkRectangle *page_area,
1102                        EvRectangle  *doc_rect)
1103 {
1104         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1105         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1106         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1107         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1108 }
1109
1110 static gboolean
1111 doc_point_to_view_point (EvView       *view,
1112                          int           page,
1113                          EvPoint      *doc_point,
1114                          GdkPoint     *view_point)
1115 {
1116         GdkRectangle page_area;
1117         GtkBorder border;
1118         double x, y, view_x, view_y;
1119         gdouble width, height;
1120
1121         get_doc_page_size (view, page, &width, &height);
1122
1123         if (view->rotation == 0) {
1124                 x = doc_point->x;
1125                 y = doc_point->y;
1126         } else if (view->rotation == 90) {
1127                 x = width - doc_point->y;
1128                 y = doc_point->x;
1129         } else if (view->rotation == 180) {
1130                 x = width - doc_point->x;
1131                 y = height - doc_point->y;
1132         } else if (view->rotation == 270) {
1133                 x = doc_point->y;
1134                 y = height - doc_point->x;
1135         } else {
1136                 g_assert_not_reached ();
1137         }
1138
1139         get_page_extents (view, page, &page_area, &border);
1140
1141         view_x = x * view->scale;
1142         view_y = y * view->scale;
1143         view_point->x = view_x + page_area.x;
1144         view_point->y = view_y + page_area.y;
1145
1146         return (view_x > 0 && view_x <= page_area.width &&
1147                 view_y > 0 && view_y <= page_area.height);
1148 }
1149
1150 static void
1151 doc_rect_to_view_rect (EvView       *view,
1152                        int           page,
1153                        EvRectangle  *doc_rect,
1154                        GdkRectangle *view_rect)
1155 {
1156         GdkRectangle page_area;
1157         GtkBorder border;
1158         double x, y, w, h;
1159         gdouble width, height;
1160
1161         get_doc_page_size (view, page, &width, &height);
1162
1163         if (view->rotation == 0) {
1164                 x = doc_rect->x1;
1165                 y = doc_rect->y1;
1166                 w = doc_rect->x2 - doc_rect->x1;
1167                 h = doc_rect->y2 - doc_rect->y1;
1168         } else if (view->rotation == 90) {
1169                 x = width - doc_rect->y2;
1170                 y = doc_rect->x1;
1171                 w = doc_rect->y2 - doc_rect->y1;
1172                 h = doc_rect->x2 - doc_rect->x1;
1173         } else if (view->rotation == 180) {
1174                 x = width - doc_rect->x2;
1175                 y = height - doc_rect->y2;
1176                 w = doc_rect->x2 - doc_rect->x1;
1177                 h = doc_rect->y2 - doc_rect->y1;
1178         } else if (view->rotation == 270) {
1179                 x = doc_rect->y1;
1180                 y = height - doc_rect->x2;
1181                 w = doc_rect->y2 - doc_rect->y1;
1182                 h = doc_rect->x2 - doc_rect->x1;
1183         } else {
1184                 g_assert_not_reached ();
1185         }
1186
1187         get_page_extents (view, page, &page_area, &border);
1188
1189         view_rect->x = x * view->scale + page_area.x;
1190         view_rect->y = y * view->scale + page_area.y;
1191         view_rect->width = w * view->scale;
1192         view_rect->height = h * view->scale;
1193 }
1194
1195 static gboolean
1196 get_dual_even_left (EvView *view)
1197 {
1198         return (ev_document_get_n_pages (view->document) > 2);
1199 }
1200
1201 static void
1202 find_page_at_location (EvView  *view,
1203                        gdouble  x,
1204                        gdouble  y,
1205                        gint    *page,
1206                        gint    *x_offset,
1207                        gint    *y_offset)
1208 {
1209         int i;
1210
1211         if (view->document == NULL)
1212                 return;
1213
1214         g_assert (page);
1215         g_assert (x_offset);
1216         g_assert (y_offset);
1217
1218         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1219                 GdkRectangle page_area;
1220                 GtkBorder border;
1221
1222                 if (! get_page_extents (view, i, &page_area, &border))
1223                         continue;
1224
1225                 if ((x >= page_area.x + border.left) &&
1226                     (x < page_area.x + page_area.width - border.right) &&
1227                     (y >= page_area.y + border.top) &&
1228                     (y < page_area.y + page_area.height - border.bottom)) {
1229                         *page = i;
1230                         *x_offset = x - (page_area.x + border.left);
1231                         *y_offset = y - (page_area.y + border.top);
1232                         return;
1233                 }
1234         }
1235
1236         *page = -1;
1237 }
1238
1239 static gboolean
1240 location_in_text (EvView  *view,
1241                   gdouble  x,
1242                   gdouble  y)
1243 {
1244         GdkRegion *region;
1245         gint page = -1;
1246         gint x_offset = 0, y_offset = 0;
1247
1248         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1249
1250         if (page == -1)
1251                 return FALSE;
1252
1253         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1254
1255         if (region)
1256                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1257         else
1258                 return FALSE;
1259 }
1260
1261 static int
1262 ev_view_get_width (EvView *view)
1263 {
1264         return GTK_WIDGET (view)->allocation.width;
1265 }
1266
1267 static int
1268 ev_view_get_height (EvView *view)
1269 {
1270         return GTK_WIDGET (view)->allocation.height;
1271 }
1272
1273 static gboolean
1274 location_in_selected_text (EvView  *view,
1275                            gdouble  x,
1276                            gdouble  y)
1277 {
1278         gint page = -1;
1279         gint x_offset = 0, y_offset = 0;
1280         EvViewSelection *selection;
1281         GList *l = NULL;
1282
1283         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1284                 selection = (EvViewSelection *)l->data;
1285
1286                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1287
1288                 if (page != selection->page)
1289                         continue;
1290
1291                 if (selection->covered_region &&
1292                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1293                         return TRUE;
1294         }
1295
1296         return FALSE;
1297 }
1298
1299 static gboolean
1300 get_doc_point_from_offset (EvView *view,
1301                            gint    page,
1302                            gint    x_offset,
1303                            gint    y_offset,
1304                            gint   *x_new,
1305                            gint   *y_new)
1306 {
1307         gdouble width, height;
1308         double x, y;
1309
1310         get_doc_page_size (view, page, &width, &height);
1311
1312         x_offset = x_offset / view->scale;
1313         y_offset = y_offset / view->scale;
1314
1315         if (view->rotation == 0) {
1316                 x = x_offset;
1317                 y = y_offset;
1318         } else if (view->rotation == 90) {
1319                 x = y_offset;
1320                 y = width - x_offset;
1321         } else if (view->rotation == 180) {
1322                 x = width - x_offset;
1323                 y = height - y_offset;
1324         } else if (view->rotation == 270) {
1325                 x = height - y_offset;
1326                 y = x_offset;
1327         } else {
1328                 g_assert_not_reached ();
1329         }
1330
1331         *x_new = x;
1332         *y_new = y;
1333
1334         return TRUE;
1335 }
1336
1337 static gboolean
1338 get_doc_point_from_location (EvView  *view,
1339                              gdouble  x,
1340                              gdouble  y,
1341                              gint    *page,
1342                              gint    *x_new,
1343                              gint    *y_new)
1344 {
1345         gint x_offset = 0, y_offset = 0;
1346
1347         x += view->scroll_x;
1348         y += view->scroll_y;
1349         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1350         if (*page == -1)
1351                 return FALSE;
1352
1353         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1354 }
1355
1356 static void
1357 ev_view_get_area_from_mapping (EvView       *view,
1358                                guint         page,
1359                                GList        *mapping_list,
1360                                gconstpointer data,
1361                                GdkRectangle *area)
1362 {
1363         EvMapping *mapping;
1364
1365         mapping = ev_mapping_list_find (mapping_list, data);
1366         doc_rect_to_view_rect (view, page, &mapping->area, area);
1367         area->x -= view->scroll_x;
1368         area->y -= view->scroll_y;
1369 }
1370
1371
1372 /*** Hyperref ***/
1373 static EvLink *
1374 ev_view_get_link_at_location (EvView  *view,
1375                               gdouble  x,
1376                               gdouble  y)
1377 {
1378         gint page = -1;
1379         gint x_new = 0, y_new = 0;
1380         GList *link_mapping;
1381
1382         if (!EV_IS_DOCUMENT_LINKS (view->document))
1383                 return NULL;
1384
1385         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1386                 return NULL;
1387
1388         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1389
1390         if (link_mapping)
1391                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1392         else
1393                 return NULL;
1394 }
1395
1396 static void
1397 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1398 {
1399         EvPoint doc_point;
1400         gdouble zoom, left, top;
1401         gboolean change_left, change_top;
1402
1403         left = ev_link_dest_get_left (dest, &change_left);
1404         top = ev_link_dest_get_top (dest, &change_top);
1405
1406         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1407                                        ev_link_dest_get_bottom (dest) - top,
1408                                        ev_view_get_width (view),
1409                                        ev_view_get_height (view));
1410
1411         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1412         ev_document_model_set_scale (view->model, zoom);
1413
1414         doc_point.x = change_left ? left : 0;
1415         doc_point.y = change_top ? top : 0;
1416
1417         view->current_page = ev_link_dest_get_page (dest);
1418         if (change_left || change_top)
1419                 view->pending_point = doc_point;
1420         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1421
1422         gtk_widget_queue_resize (GTK_WIDGET (view));
1423 }
1424
1425 static void
1426 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1427 {
1428         EvPoint doc_point;
1429         gdouble doc_width, doc_height;
1430         gint page;
1431         double zoom, left;
1432         gboolean change_left;
1433
1434         page = ev_link_dest_get_page (dest);
1435         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1436
1437         left = ev_link_dest_get_left (dest, &change_left);
1438         doc_point.x = change_left ? left : 0;
1439         doc_point.y = 0;
1440
1441         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1442                                          ev_view_get_width (view),
1443                                          ev_view_get_height (view));
1444
1445         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1446         ev_document_model_set_scale (view->model, zoom);
1447
1448         view->current_page = page;
1449         if (change_left)
1450                 view->pending_point = doc_point;
1451         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1452
1453         gtk_widget_queue_resize (GTK_WIDGET (view));
1454 }
1455
1456 static void
1457 goto_fith_dest (EvView *view, EvLinkDest *dest)
1458 {
1459         EvPoint doc_point;
1460         gdouble doc_width, doc_height;
1461         gint page;
1462         gdouble zoom, top;
1463         gboolean change_top;
1464
1465         page = ev_link_dest_get_page (dest);
1466         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1467
1468         top = ev_link_dest_get_top (dest, &change_top);
1469
1470         doc_point.x = 0;
1471         doc_point.y = change_top ? top : 0;
1472
1473         zoom = zoom_for_size_fit_width (doc_width, top,
1474                                         ev_view_get_width (view),
1475                                         ev_view_get_height (view));
1476
1477         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1478         ev_document_model_set_scale (view->model, zoom);
1479
1480         view->current_page = page;
1481         if (change_top)
1482                 view->pending_point = doc_point;
1483         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1484
1485         gtk_widget_queue_resize (GTK_WIDGET (view));
1486 }
1487
1488 static void
1489 goto_fit_dest (EvView *view, EvLinkDest *dest)
1490 {
1491         double zoom;
1492         gdouble doc_width, doc_height;
1493         int page;
1494
1495         page = ev_link_dest_get_page (dest);
1496         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1497
1498         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1499                                        ev_view_get_width (view),
1500                                        ev_view_get_height (view));
1501
1502         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1503         ev_document_model_set_scale (view->model, zoom);
1504
1505         view->current_page = page;
1506         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1507
1508         gtk_widget_queue_resize (GTK_WIDGET (view));
1509 }
1510
1511 static void
1512 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1513 {
1514         EvPoint doc_point;
1515         gint page;
1516         gdouble zoom, left, top;
1517         gboolean change_zoom, change_left, change_top;
1518
1519         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1520         page = ev_link_dest_get_page (dest);
1521
1522         if (change_zoom && zoom > 1) {
1523                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1524                 ev_document_model_set_scale (view->model, zoom);
1525         }
1526
1527         left = ev_link_dest_get_left (dest, &change_left);
1528         top = ev_link_dest_get_top (dest, &change_top);
1529
1530         doc_point.x = change_left ? left : 0;
1531         doc_point.y = change_top ? top : 0;
1532
1533         view->current_page = page;
1534         if (change_left || change_top)
1535                 view->pending_point = doc_point;
1536         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1537
1538         gtk_widget_queue_resize (GTK_WIDGET (view));
1539 }
1540
1541 static void
1542 goto_dest (EvView *view, EvLinkDest *dest)
1543 {
1544         EvLinkDestType type;
1545         int page, n_pages, current_page;
1546
1547         page = ev_link_dest_get_page (dest);
1548         n_pages = ev_document_get_n_pages (view->document);
1549
1550         if (page < 0 || page >= n_pages)
1551                 return;
1552
1553         current_page = view->current_page;
1554
1555         type = ev_link_dest_get_dest_type (dest);
1556
1557         switch (type) {
1558                 case EV_LINK_DEST_TYPE_PAGE:
1559                         ev_document_model_set_page (view->model, page);
1560                         break;
1561                 case EV_LINK_DEST_TYPE_FIT:
1562                         goto_fit_dest (view, dest);
1563                         break;
1564                 case EV_LINK_DEST_TYPE_FITH:
1565                         goto_fith_dest (view, dest);
1566                         break;
1567                 case EV_LINK_DEST_TYPE_FITV:
1568                         goto_fitv_dest (view, dest);
1569                         break;
1570                 case EV_LINK_DEST_TYPE_FITR:
1571                         goto_fitr_dest (view, dest);
1572                         break;
1573                 case EV_LINK_DEST_TYPE_XYZ:
1574                         goto_xyz_dest (view, dest);
1575                         break;
1576                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1577                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1578                         break;
1579                 default:
1580                         g_assert_not_reached ();
1581         }
1582
1583         if (current_page != view->current_page)
1584                 ev_document_model_set_page (view->model, view->current_page);
1585 }
1586
1587 static void
1588 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1589 {
1590         EvLinkDestType type;
1591
1592         type = ev_link_dest_get_dest_type (dest);
1593
1594         if (type == EV_LINK_DEST_TYPE_NAMED) {
1595                 EvLinkDest  *dest2;
1596                 const gchar *named_dest;
1597
1598                 named_dest = ev_link_dest_get_named_dest (dest);
1599                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1600                                                           named_dest);
1601                 if (dest2) {
1602                         goto_dest (view, dest2);
1603                         g_object_unref (dest2);
1604                 }
1605
1606                 return;
1607         }
1608
1609         goto_dest (view, dest);
1610 }
1611
1612 void
1613 ev_view_handle_link (EvView *view, EvLink *link)
1614 {
1615         EvLinkAction    *action = NULL;
1616         EvLinkActionType type;
1617
1618         action = ev_link_get_action (link);
1619         if (!action)
1620                 return;
1621
1622         type = ev_link_action_get_action_type (action);
1623
1624         switch (type) {
1625                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1626                         EvLinkDest *dest;
1627
1628                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1629
1630                         dest = ev_link_action_get_dest (action);
1631                         ev_view_goto_dest (view, dest);
1632                 }
1633                         break;
1634                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1635                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1636                 case EV_LINK_ACTION_TYPE_LAUNCH:
1637                 case EV_LINK_ACTION_TYPE_NAMED:
1638                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1639                         break;
1640         }
1641 }
1642
1643 gchar *
1644 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1645 {
1646         EvLinkDestType type;
1647         gchar *msg = NULL;
1648
1649         type = ev_link_dest_get_dest_type (dest);
1650
1651         switch (type) {
1652                 case EV_LINK_DEST_TYPE_NAMED: {
1653                         EvLinkDest  *dest2;
1654                         const gchar *named_dest;
1655
1656                         named_dest = ev_link_dest_get_named_dest (dest);
1657                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1658                                                                   named_dest);
1659                         if (dest2) {
1660                                 msg = ev_document_get_page_label (view->document,
1661                                                                   ev_link_dest_get_page (dest2));
1662                                 g_object_unref (dest2);
1663                         }
1664                 }
1665
1666                         break;
1667                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1668                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1669                 }
1670                         break;
1671                 default:
1672                         msg = ev_document_get_page_label (view->document,
1673                                                           ev_link_dest_get_page (dest));
1674         }
1675
1676         return msg;
1677 }
1678
1679 static char *
1680 tip_from_action_named (EvLinkAction *action)
1681 {
1682         const gchar *name = ev_link_action_get_name (action);
1683
1684         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1685                 return g_strdup (_("Go to first page"));
1686         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1687                 return g_strdup (_("Go to previous page"));
1688         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1689                 return g_strdup (_("Go to next page"));
1690         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1691                 return g_strdup (_("Go to last page"));
1692         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1693                 return g_strdup (_("Go to page"));
1694         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1695                 return g_strdup (_("Find"));
1696         }
1697
1698         return NULL;
1699 }
1700
1701 static char *
1702 tip_from_link (EvView *view, EvLink *link)
1703 {
1704         EvLinkAction *action;
1705         EvLinkActionType type;
1706         char *msg = NULL;
1707         char *page_label;
1708         const char *title;
1709
1710         action = ev_link_get_action (link);
1711         title = ev_link_get_title (link);
1712
1713         if (!action)
1714                 return title ? g_strdup (title) : NULL;
1715
1716         type = ev_link_action_get_action_type (action);
1717
1718         switch (type) {
1719                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1720                         page_label = ev_view_page_label_from_dest (view,
1721                                                                    ev_link_action_get_dest (action));
1722                         if (page_label) {
1723                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1724                                 g_free (page_label);
1725                         }
1726                         break;
1727                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1728                         if (title) {
1729                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1730                                                        ev_link_action_get_filename (action));
1731                         } else {
1732                                 msg = g_strdup_printf (_("Go to file “%s”"),
1733                                                        ev_link_action_get_filename (action));
1734                         }
1735                         break;
1736                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1737                         msg = g_strdup (ev_link_action_get_uri (action));
1738                         break;
1739                 case EV_LINK_ACTION_TYPE_LAUNCH:
1740                         msg = g_strdup_printf (_("Launch %s"),
1741                                                ev_link_action_get_filename (action));
1742                         break;
1743                 case EV_LINK_ACTION_TYPE_NAMED:
1744                         msg = tip_from_action_named (action);
1745                         break;
1746                 default:
1747                         if (title)
1748                                 msg = g_strdup (title);
1749                         break;
1750         }
1751
1752         return msg;
1753 }
1754
1755 static void
1756 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1757 {
1758         EvLink       *link;
1759         EvFormField  *field;
1760         EvAnnotation *annot = NULL;
1761
1762         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1763                 return;
1764
1765         if (view->drag_info.in_drag) {
1766                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1767                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1768                 return;
1769         }
1770
1771         if (view->scroll_info.autoscrolling) {
1772                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1773                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1774                 return;
1775         }
1776
1777         link = ev_view_get_link_at_location (view, x, y);
1778         if (link) {
1779                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1780         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1781                 if (field->is_read_only) {
1782                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1783                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1784                             view->cursor == EV_VIEW_CURSOR_DRAG)
1785                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1786                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1787                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1788                 } else {
1789                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1790                 }
1791         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1792                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1793         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1794                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1795         } else {
1796                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1797                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1798                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1799                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1800                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1801         }
1802
1803         if (link || annot)
1804                 g_object_set (view, "has-tooltip", TRUE, NULL);
1805 }
1806
1807 /*** Images ***/
1808 static EvImage *
1809 ev_view_get_image_at_location (EvView  *view,
1810                                gdouble  x,
1811                                gdouble  y)
1812 {
1813         gint page = -1;
1814         gint x_new = 0, y_new = 0;
1815         GList *image_mapping;
1816
1817         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1818                 return NULL;
1819
1820         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1821                 return NULL;
1822
1823         image_mapping = ev_pixbuf_cache_get_image_mapping (view->pixbuf_cache, page);
1824
1825         if (image_mapping)
1826                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1827         else
1828                 return NULL;
1829 }
1830
1831 /*** Forms ***/
1832 static EvFormField *
1833 ev_view_get_form_field_at_location (EvView  *view,
1834                                     gdouble  x,
1835                                     gdouble  y)
1836 {
1837         gint page = -1;
1838         gint x_new = 0, y_new = 0;
1839         GList *forms_mapping;
1840
1841         if (!EV_IS_DOCUMENT_FORMS (view->document))
1842                 return NULL;
1843
1844         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1845                 return NULL;
1846
1847         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, page);
1848
1849         if (forms_mapping)
1850                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1851         else
1852                 return NULL;
1853 }
1854
1855 static GdkRegion *
1856 ev_view_form_field_get_region (EvView      *view,
1857                                EvFormField *field)
1858 {
1859         GdkRectangle view_area;
1860         GList       *forms_mapping;
1861
1862         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1863                                                                 field->page->index);
1864         ev_view_get_area_from_mapping (view, field->page->index,
1865                                        forms_mapping,
1866                                        field, &view_area);
1867
1868         return gdk_region_rectangle (&view_area);
1869 }
1870
1871 static gboolean
1872 ev_view_forms_remove_widgets (EvView *view)
1873 {
1874         ev_view_remove_all (view);
1875
1876         return FALSE;
1877 }
1878
1879 static void
1880 ev_view_form_field_destroy (GtkWidget *widget,
1881                             EvView    *view)
1882 {
1883         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1884 }
1885
1886 static GtkWidget *
1887 ev_view_form_field_button_create_widget (EvView      *view,
1888                                          EvFormField *field)
1889 {
1890         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1891         GdkRegion         *field_region = NULL;
1892
1893         switch (field_button->type) {
1894                 case EV_FORM_FIELD_BUTTON_PUSH:
1895                         return NULL;
1896                 case EV_FORM_FIELD_BUTTON_CHECK:
1897                 case EV_FORM_FIELD_BUTTON_RADIO: {
1898                         gboolean  state;
1899                         GList    *forms_mapping, *l;
1900
1901                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1902                                                                                field);
1903
1904                         /* FIXME: it actually depends on NoToggleToOff flags */
1905                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1906                             state && field_button->state)
1907                                 return NULL;
1908
1909                         field_region = ev_view_form_field_get_region (view, field);
1910
1911                         /* For radio buttons and checkbox buttons that are in a set
1912                          * we need to update also the region for the current selected item
1913                          */
1914                         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1915                                                                                 field->page->index);
1916                         for (l = forms_mapping; l; l = g_list_next (l)) {
1917                                 EvFormField *button = ((EvMapping *)(l->data))->data;
1918                                 GdkRegion   *button_region;
1919
1920                                 if (button->id == field->id)
1921                                         continue;
1922
1923                                 /* FIXME: only buttons in the same group should be updated */
1924                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1925                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1926                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1927                                         continue;
1928
1929                                 button_region = ev_view_form_field_get_region (view, button);
1930                                 gdk_region_union (field_region, button_region);
1931                                 gdk_region_destroy (button_region);
1932                         }
1933
1934                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
1935                                                                        field, !state);
1936                         field_button->state = !state;
1937                 }
1938                         break;
1939         }
1940
1941         ev_view_reload_page (view, field->page->index, field_region);
1942         gdk_region_destroy (field_region);
1943
1944         return NULL;
1945 }
1946
1947 static void
1948 ev_view_form_field_text_save (EvView    *view,
1949                               GtkWidget *widget)
1950 {
1951         EvFormField *field;
1952
1953         if (!view->document)
1954                 return;
1955
1956         field = g_object_get_data (G_OBJECT (widget), "form-field");
1957
1958         if (field->changed) {
1959                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1960                 GdkRegion       *field_region;
1961
1962                 field_region = ev_view_form_field_get_region (view, field);
1963
1964                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
1965                                                             field, field_text->text);
1966                 field->changed = FALSE;
1967                 ev_view_reload_page (view, field->page->index, field_region);
1968                 gdk_region_destroy (field_region);
1969         }
1970 }
1971
1972 static void
1973 ev_view_form_field_text_changed (GtkWidget   *widget,
1974                                  EvFormField *field)
1975 {
1976         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1977         gchar           *text = NULL;
1978
1979         if (GTK_IS_ENTRY (widget)) {
1980                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
1981         } else if (GTK_IS_TEXT_BUFFER (widget)) {
1982                 GtkTextIter start, end;
1983
1984                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
1985                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
1986                                                  &start, &end, FALSE);
1987         }
1988
1989         if (!field_text->text ||
1990             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
1991                 g_free (field_text->text);
1992                 field_text->text = text;
1993                 field->changed = TRUE;
1994         }
1995 }
1996
1997 static GtkWidget *
1998 ev_view_form_field_text_create_widget (EvView      *view,
1999                                        EvFormField *field)
2000 {
2001         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2002         GtkWidget       *text = NULL;
2003         gchar           *txt;
2004
2005         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2006                                                           field);
2007
2008         switch (field_text->type) {
2009                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2010                         /* TODO */
2011                 case EV_FORM_FIELD_TEXT_NORMAL:
2012                         text = gtk_entry_new ();
2013                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2014                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2015                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2016
2017                         if (txt) {
2018                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2019                                 g_free (txt);
2020                         }
2021
2022                         g_signal_connect (text, "changed",
2023                                           G_CALLBACK (ev_view_form_field_text_changed),
2024                                           field);
2025                         g_signal_connect_after (text, "activate",
2026                                                 G_CALLBACK (ev_view_form_field_destroy),
2027                                                 view);
2028                         break;
2029                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2030                         GtkTextBuffer *buffer;
2031
2032                         text = gtk_text_view_new ();
2033                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2034
2035                         if (txt) {
2036                                 gtk_text_buffer_set_text (buffer, txt, -1);
2037                                 g_free (txt);
2038                         }
2039
2040                         g_signal_connect (buffer, "changed",
2041                                           G_CALLBACK (ev_view_form_field_text_changed),
2042                                           field);
2043                 }
2044                         break;
2045         }
2046
2047         g_object_weak_ref (G_OBJECT (text),
2048                            (GWeakNotify)ev_view_form_field_text_save,
2049                            view);
2050
2051         return text;
2052 }
2053
2054 static void
2055 ev_view_form_field_choice_save (EvView    *view,
2056                                 GtkWidget *widget)
2057 {
2058         EvFormField *field;
2059
2060         if (!view->document)
2061                 return;
2062
2063         field = g_object_get_data (G_OBJECT (widget), "form-field");
2064
2065         if (field->changed) {
2066                 GList             *l;
2067                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2068                 GdkRegion         *field_region;
2069
2070                 field_region = ev_view_form_field_get_region (view, field);
2071
2072                 if (field_choice->is_editable) {
2073                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2074                                                                       field, field_choice->text);
2075                 } else {
2076                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2077                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2078                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2079                                                                                  field,
2080                                                                                  GPOINTER_TO_INT (l->data));
2081                         }
2082                 }
2083                 field->changed = FALSE;
2084                 ev_view_reload_page (view, field->page->index, field_region);
2085                 gdk_region_destroy (field_region);
2086         }
2087 }
2088
2089 static void
2090 ev_view_form_field_choice_changed (GtkWidget   *widget,
2091                                    EvFormField *field)
2092 {
2093         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2094
2095         if (GTK_IS_COMBO_BOX (widget)) {
2096                 gint item;
2097
2098                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2099                 if (!field_choice->selected_items ||
2100                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2101                         g_list_free (field_choice->selected_items);
2102                         field_choice->selected_items = NULL;
2103                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2104                                                                        GINT_TO_POINTER (item));
2105                         field->changed = TRUE;
2106                 }
2107
2108                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
2109                         gchar *text;
2110
2111                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
2112                         if (!field_choice->text ||
2113                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2114                                 g_free (field_choice->text);
2115                                 field_choice->text = text;
2116                                 field->changed = TRUE;
2117                         }
2118                 }
2119         } else if (GTK_IS_TREE_SELECTION (widget)) {
2120                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2121                 GtkTreeModel     *model;
2122                 GList            *items, *l;
2123
2124                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2125                 g_list_free (field_choice->selected_items);
2126                 field_choice->selected_items = NULL;
2127
2128                 for (l = items; l && l->data; l = g_list_next (l)) {
2129                         GtkTreeIter  iter;
2130                         GtkTreePath *path = (GtkTreePath *)l->data;
2131                         gint         item;
2132
2133                         gtk_tree_model_get_iter (model, &iter, path);
2134                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2135
2136                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2137                                                                        GINT_TO_POINTER (item));
2138
2139                         gtk_tree_path_free (path);
2140                 }
2141
2142                 g_list_free (items);
2143
2144                 field->changed = TRUE;
2145         }
2146 }
2147
2148 static GtkWidget *
2149 ev_view_form_field_choice_create_widget (EvView      *view,
2150                                          EvFormField *field)
2151 {
2152         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2153         GtkWidget         *choice;
2154         GtkTreeModel      *model;
2155         gint               n_items, i;
2156         gint               selected_item = 0;
2157
2158         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2159                                                                    field);
2160         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2161         for (i = 0; i < n_items; i++) {
2162                 GtkTreeIter iter;
2163                 gchar      *item;
2164
2165                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2166                                                                      field, i);
2167                 if (ev_document_forms_form_field_choice_is_item_selected (
2168                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2169                         selected_item = i;
2170                         /* FIXME: we need a get_selected_items function in poppler */
2171                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2172                                                                        GINT_TO_POINTER (i));
2173                 }
2174
2175                 if (item) {
2176                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2177                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2178                                             0, item,
2179                                             1, i,
2180                                             -1);
2181                         g_free (item);
2182                 }
2183         }
2184
2185         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2186                 GtkCellRenderer  *renderer;
2187                 GtkWidget        *tree_view;
2188                 GtkTreeSelection *selection;
2189
2190                 tree_view = gtk_tree_view_new_with_model (model);
2191                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2192
2193                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2194                 if (field_choice->multi_select) {
2195                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2196                 }
2197
2198                 /* TODO: set selected items */
2199
2200                 renderer = gtk_cell_renderer_text_new ();
2201                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2202                                                              0,
2203                                                              "choix", renderer,
2204                                                              "text", 0,
2205                                                              NULL);
2206
2207                 choice = gtk_scrolled_window_new (NULL, NULL);
2208                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2209                                                 GTK_POLICY_AUTOMATIC,
2210                                                 GTK_POLICY_AUTOMATIC);
2211                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2212                 gtk_widget_show (tree_view);
2213
2214                 g_signal_connect (selection, "changed",
2215                                   G_CALLBACK (ev_view_form_field_choice_changed),
2216                                   field);
2217                 g_signal_connect_after (selection, "changed",
2218                                         G_CALLBACK (ev_view_form_field_destroy),
2219                                         view);
2220         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2221                 gchar *text;
2222
2223                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2224                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2225                 if (text) {
2226                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2227                         g_free (text);
2228                 }
2229
2230                 g_signal_connect (choice, "changed",
2231                                   G_CALLBACK (ev_view_form_field_choice_changed),
2232                                   field);
2233                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
2234                                         G_CALLBACK (ev_view_form_field_destroy),
2235                                         view);
2236         } else { /* ComboBoxText */
2237                 GtkCellRenderer *renderer;
2238
2239                 choice = gtk_combo_box_new_with_model (model);
2240                 renderer = gtk_cell_renderer_text_new ();
2241                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2242                                             renderer, TRUE);
2243                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2244                                                 renderer,
2245                                                 "text", 0,
2246                                                 NULL);
2247                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2248                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2249
2250                 g_signal_connect (choice, "changed",
2251                                   G_CALLBACK (ev_view_form_field_choice_changed),
2252                                   field);
2253                 g_signal_connect_after (choice, "changed",
2254                                         G_CALLBACK (ev_view_form_field_destroy),
2255                                         view);
2256         }
2257
2258         g_object_unref (model);
2259
2260         g_object_weak_ref (G_OBJECT (choice),
2261                            (GWeakNotify)ev_view_form_field_choice_save,
2262                            view);
2263
2264         return choice;
2265 }
2266
2267 static void
2268 ev_view_handle_form_field (EvView      *view,
2269                            EvFormField *field,
2270                            gdouble      x,
2271                            gdouble      y)
2272 {
2273         GtkWidget   *field_widget = NULL;
2274         GList       *form_field_mapping;
2275         GdkRectangle view_area;
2276
2277         if (field->is_read_only)
2278                 return;
2279
2280         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2281                 field_widget = ev_view_form_field_button_create_widget (view, field);
2282         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2283                 field_widget = ev_view_form_field_text_create_widget (view, field);
2284         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2285                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2286         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2287                 /* TODO */
2288         }
2289
2290         /* Form field doesn't require a widget */
2291         if (!field_widget)
2292                 return;
2293
2294         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2295                                 g_object_ref (field),
2296                                 (GDestroyNotify)g_object_unref);
2297
2298         form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, field->page->index);
2299         ev_view_get_area_from_mapping (view, field->page->index,
2300                                        form_field_mapping,
2301                                        field, &view_area);
2302
2303         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2304         gtk_widget_show (field_widget);
2305         gtk_widget_grab_focus (field_widget);
2306 }
2307
2308 /* Annotations */
2309 static EvViewWindowChild *
2310 ev_view_get_window_child (EvView    *view,
2311                           GtkWidget *window)
2312 {
2313         GList *children = view->window_children;
2314
2315         while (children) {
2316                 EvViewWindowChild *child;
2317
2318                 child = (EvViewWindowChild *)children->data;
2319                 children = children->next;
2320
2321                 if (child->window == window)
2322                         return child;
2323         }
2324
2325         return NULL;
2326 }
2327
2328 static void
2329 ev_view_window_child_move (EvView            *view,
2330                            EvViewWindowChild *child,
2331                            gint               x,
2332                            gint               y)
2333 {
2334         child->x = x;
2335         child->y = y;
2336         gtk_window_move (GTK_WINDOW (child->window),
2337                          MAX (child->parent_x, x),
2338                          MAX (child->parent_y, y));
2339 }
2340
2341 static void
2342 ev_view_window_child_move_with_parent (EvView    *view,
2343                                        GtkWidget *window)
2344 {
2345         EvViewWindowChild *child;
2346         gint               root_x, root_y;
2347
2348         child = ev_view_get_window_child (view, window);
2349         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2350                                &root_x, &root_y);
2351         if (root_x != child->parent_x || root_y != child->parent_y) {
2352                 gint dest_x, dest_y;
2353
2354                 dest_x = child->x + (root_x - child->parent_x);
2355                 dest_y = child->y + (root_y - child->parent_y);
2356                 child->parent_x = root_x;
2357                 child->parent_y = root_y;
2358                 ev_view_window_child_move (view, child, dest_x, dest_y);
2359         }
2360
2361         if (child->visible && !GTK_WIDGET_VISIBLE (window))
2362                 gtk_widget_show (window);
2363 }
2364
2365 static void
2366 ev_view_window_child_put (EvView    *view,
2367                           GtkWidget *window,
2368                           guint      page,
2369                           gint       x,
2370                           gint       y,
2371                           gdouble    orig_x,
2372                           gdouble    orig_y)
2373 {
2374         EvViewWindowChild *child;
2375         gint               root_x, root_y;
2376
2377         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2378                                &root_x, &root_y);
2379
2380         child = g_new0 (EvViewWindowChild, 1);
2381         child->window = window;
2382         child->page = page;
2383         child->orig_x = orig_x;
2384         child->orig_y = orig_y;
2385         child->parent_x = root_x;
2386         child->parent_y = root_y;
2387         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2388         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2389
2390         if (child->visible)
2391                 gtk_widget_show (window);
2392         else
2393                 gtk_widget_hide (window);
2394
2395         view->window_children = g_list_append (view->window_children, child);
2396 }
2397
2398 static EvViewWindowChild *
2399 ev_view_find_window_child_for_annot (EvView       *view,
2400                                      guint         page,
2401                                      EvAnnotation *annot)
2402 {
2403         GList *children = view->window_children;
2404
2405         while (children) {
2406                 EvViewWindowChild *child;
2407                 EvAnnotation      *wannot;
2408
2409                 child = (EvViewWindowChild *)children->data;
2410                 children = children->next;
2411
2412                 if (child->page != page)
2413                         continue;
2414
2415                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2416                 if (wannot == annot || strcmp (wannot->name, annot->name) == 0)
2417                         return child;
2418         }
2419
2420         return NULL;
2421 }
2422
2423 static void
2424 ev_view_window_children_free (EvView *view)
2425 {
2426         GList *l;
2427
2428         if (!view->window_children)
2429                 return;
2430
2431         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2432                 EvViewWindowChild *child;
2433
2434                 child = (EvViewWindowChild *)l->data;
2435                 gtk_widget_destroy (GTK_WIDGET (child->window));
2436                 g_free (child);
2437         }
2438         g_list_free (view->window_children);
2439         view->window_children = NULL;
2440         view->window_child_focus = NULL;
2441 }
2442
2443 static void
2444 annotation_window_grab_focus (GtkWidget *widget,
2445                               EvView    *view)
2446 {
2447         if (view->window_child_focus)
2448                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2449         view->window_child_focus = ev_view_get_window_child (view, widget);
2450 }
2451
2452 static void
2453 annotation_window_closed (EvAnnotationWindow *window,
2454                           EvView             *view)
2455 {
2456         EvViewWindowChild *child;
2457
2458         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2459         child->visible = FALSE;
2460 }
2461
2462 static void
2463 annotation_window_moved (EvAnnotationWindow *window,
2464                          gint                x,
2465                          gint                y,
2466                          EvView             *view)
2467 {
2468         EvViewWindowChild *child;
2469         GdkRectangle       page_area;
2470         GtkBorder          border;
2471         GdkRectangle       view_rect;
2472         EvRectangle        doc_rect;
2473         gint               width, height;
2474
2475         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2476         if (child->x == x && child->y == y)
2477                 return;
2478
2479         child->moved = TRUE;
2480         child->x = x;
2481         child->y = y;
2482
2483         /* Window has been moved by the user,
2484          * we have to set a new origin in doc coords
2485          */
2486         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2487         view_rect.x = (x - child->parent_x) + view->scroll_x;
2488         view_rect.y = (y - child->parent_y) + view->scroll_y;
2489         view_rect.width = width;
2490         view_rect.height = height;
2491
2492         get_page_extents (view, child->page, &page_area, &border);
2493         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2494         child->orig_x = doc_rect.x1;
2495         child->orig_y = doc_rect.y1;
2496 }
2497
2498 static void
2499 ev_view_annotation_save (EvView       *view,
2500                          EvAnnotation *annot)
2501 {
2502         if (!view->document)
2503                 return;
2504
2505         if (!annot->changed)
2506                 return;
2507
2508         ev_document_annotations_annotation_set_contents (EV_DOCUMENT_ANNOTATIONS (view->document),
2509                                                          annot, annot->contents);
2510         annot->changed = FALSE;
2511 }
2512
2513 static void
2514 show_annotation_windows (EvView *view,
2515                          gint    page)
2516 {
2517         GList     *annots, *l;
2518         GtkWindow *parent;
2519
2520         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2521
2522         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2523
2524         for (l = annots; l && l->data; l = g_list_next (l)) {
2525                 EvAnnotation      *annot;
2526                 EvViewWindowChild *child;
2527                 GtkWidget         *window;
2528                 EvRectangle       *doc_rect;
2529                 GdkRectangle       view_rect;
2530
2531                 annot = ((EvMapping *)(l->data))->data;
2532
2533                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2534                         continue;
2535
2536                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2537                         continue;
2538
2539                 window = g_object_get_data (G_OBJECT (annot), "popup");
2540                 if (window) {
2541                         ev_view_window_child_move_with_parent (view, window);
2542                         continue;
2543                 }
2544
2545                 /* Look if we already have a popup for this annot */
2546                 child = ev_view_find_window_child_for_annot (view, page, annot);
2547                 window = child ? child->window : NULL;
2548                 if (window) {
2549                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2550                         g_object_set_data (G_OBJECT (annot), "popup", window);
2551                         ev_view_window_child_move_with_parent (view, window);
2552                 } else {
2553                         window = ev_annotation_window_new (annot, parent);
2554                         g_signal_connect (window, "grab_focus",
2555                                           G_CALLBACK (annotation_window_grab_focus),
2556                                           view);
2557                         g_signal_connect (window, "closed",
2558                                           G_CALLBACK (annotation_window_closed),
2559                                           view);
2560                         g_signal_connect (window, "moved",
2561                                           G_CALLBACK (annotation_window_moved),
2562                                           view);
2563                         g_object_set_data (G_OBJECT (annot), "popup", window);
2564
2565                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2566                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2567                         view_rect.x -= view->scroll_x;
2568                         view_rect.y -= view->scroll_y;
2569
2570                         ev_view_window_child_put (view, window, page,
2571                                                   view_rect.x, view_rect.y,
2572                                                   doc_rect->x1, doc_rect->y1);
2573
2574                         g_object_weak_ref (G_OBJECT (annot),
2575                                            (GWeakNotify)ev_view_annotation_save,
2576                                            view);
2577                 }
2578         }
2579 }
2580
2581 static void
2582 hide_annotation_windows (EvView *view,
2583                          gint    page)
2584 {
2585         GList *annots, *l;
2586
2587         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2588
2589         for (l = annots; l && l->data; l = g_list_next (l)) {
2590                 EvAnnotation *annot;
2591                 GtkWidget    *window;
2592
2593                 annot = ((EvMapping *)(l->data))->data;
2594
2595                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2596                         continue;
2597
2598                 window = g_object_get_data (G_OBJECT (annot), "popup");
2599                 if (window)
2600                         gtk_widget_hide (window);
2601         }
2602 }
2603
2604 static EvAnnotation *
2605 ev_view_get_annotation_at_location (EvView  *view,
2606                                     gdouble  x,
2607                                     gdouble  y)
2608 {
2609         gint page = -1;
2610         gint x_new = 0, y_new = 0;
2611         GList *annotations_mapping;
2612
2613         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2614                 return NULL;
2615
2616         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2617                 return NULL;
2618
2619         annotations_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2620
2621         if (annotations_mapping)
2622                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2623         else
2624                 return NULL;
2625 }
2626
2627 static void
2628 ev_view_handle_annotation (EvView       *view,
2629                            EvAnnotation *annot,
2630                            gdouble       x,
2631                            gdouble       y)
2632 {
2633         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2634                 GtkWidget *window;
2635
2636                 window = g_object_get_data (G_OBJECT (annot), "popup");
2637                 if (window) {
2638                         EvViewWindowChild *child;
2639
2640                         child = ev_view_get_window_child (view, window);
2641                         if (!child->visible) {
2642                                 child->visible = TRUE;
2643                                 ev_view_window_child_move (view, child, child->x, child->y);
2644                                 gtk_widget_show (window);
2645                         }
2646                 }
2647         }
2648 }
2649
2650 /*** GtkWidget implementation ***/
2651
2652 static void
2653 ev_view_size_request_continuous_dual_page (EvView         *view,
2654                                            GtkRequisition *requisition)
2655 {
2656         int max_width;
2657         gint n_pages;
2658         GtkBorder border;
2659
2660         ev_view_get_max_page_size (view, &max_width, NULL);
2661         compute_border (view, max_width, max_width, &border);
2662
2663         n_pages = ev_document_get_n_pages (view->document) + 1;
2664
2665         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2666         get_page_y_offset (view, n_pages, &requisition->height);
2667
2668         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2669                 requisition->width = 1;
2670         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2671                 requisition->width = 1;
2672                 /* FIXME: This could actually be set on one page docs or docs
2673                  * with a strange aspect ratio. */
2674                 /* requisition->height = 1;*/
2675         }
2676 }
2677
2678 static void
2679 ev_view_size_request_continuous (EvView         *view,
2680                                  GtkRequisition *requisition)
2681 {
2682         int max_width;
2683         int n_pages;
2684         GtkBorder border;
2685
2686         ev_view_get_max_page_size (view, &max_width, NULL);
2687         n_pages = ev_document_get_n_pages (view->document);
2688         compute_border (view, max_width, max_width, &border);
2689
2690         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2691         get_page_y_offset (view, n_pages, &requisition->height);
2692
2693         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2694                 requisition->width = 1;
2695         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2696                 requisition->width = 1;
2697                 /* FIXME: This could actually be set on one page docs or docs
2698                  * with a strange aspect ratio. */
2699                 /* requisition->height = 1;*/
2700         }
2701 }
2702
2703 static void
2704 ev_view_size_request_dual_page (EvView         *view,
2705                                 GtkRequisition *requisition)
2706 {
2707         GtkBorder border;
2708         gint width, height;
2709
2710         /* Find the largest of the two. */
2711         ev_view_get_page_size (view,
2712                                view->current_page,
2713                                &width, &height);
2714         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
2715                 gint width_2, height_2;
2716                 ev_view_get_page_size (view,
2717                                        view->current_page + 1,
2718                                        &width_2, &height_2);
2719                 if (width_2 > width) {
2720                         width = width_2;
2721                         height = height_2;
2722                 }
2723         }
2724         compute_border (view, width, height, &border);
2725
2726         requisition->width = ((width + border.left + border.right) * 2) +
2727                 (view->spacing * 3);
2728         requisition->height = (height + border.top + border.bottom) +
2729                 (view->spacing * 2);
2730
2731         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2732                 requisition->width = 1;
2733         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2734                 requisition->width = 1;
2735                 requisition->height = 1;
2736         }
2737 }
2738
2739 static void
2740 ev_view_size_request_single_page (EvView         *view,
2741                                   GtkRequisition *requisition)
2742 {
2743         GtkBorder border;
2744         gint width, height;
2745
2746         ev_view_get_page_size (view, view->current_page, &width, &height);
2747         compute_border (view, width, height, &border);
2748
2749         requisition->width = width + border.left + border.right + (2 * view->spacing);
2750         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2751
2752         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2753                 requisition->width = 1;
2754                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2755         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2756                 requisition->width = 1;
2757                 requisition->height = 1;
2758         }
2759 }
2760
2761 static void
2762 ev_view_size_request (GtkWidget      *widget,
2763                       GtkRequisition *requisition)
2764 {
2765         EvView *view = EV_VIEW (widget);
2766
2767         if (view->document == NULL) {
2768                 requisition->width = 1;
2769                 requisition->height = 1;
2770                 return;
2771         }
2772
2773         if (view->presentation) {
2774                 requisition->width = 1;
2775                 requisition->height = 1;
2776                 return;
2777         }
2778
2779         if (view->continuous && view->dual_page)
2780                 ev_view_size_request_continuous_dual_page (view, requisition);
2781         else if (view->continuous)
2782                 ev_view_size_request_continuous (view, requisition);
2783         else if (view->dual_page)
2784                 ev_view_size_request_dual_page (view, requisition);
2785         else
2786                 ev_view_size_request_single_page (view, requisition);
2787 }
2788
2789 static void
2790 ev_view_size_allocate (GtkWidget      *widget,
2791                        GtkAllocation  *allocation)
2792 {
2793         EvView *view = EV_VIEW (widget);
2794         GList  *children, *l;
2795         gint    root_x, root_y;
2796
2797         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2798
2799         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2800             view->sizing_mode == EV_SIZING_BEST_FIT) {
2801                 ev_view_zoom_for_size (view,
2802                                        allocation->width,
2803                                        allocation->height);
2804                 ev_view_size_request (widget, &widget->requisition);
2805         }
2806
2807         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2808         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2809
2810         if (view->document)
2811                 view_update_range_and_current_page (view);
2812
2813         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2814         view->pending_resize = FALSE;
2815
2816         children = gtk_container_get_children (GTK_CONTAINER (widget));
2817         for (l = children; l && l->data; l = g_list_next (l)) {
2818                 EvFormField   *field;
2819                 GdkRectangle   view_area;
2820                 GList         *form_field_mapping;
2821                 GtkAllocation  child_allocation;
2822                 GtkRequisition child_requisition;
2823                 GtkWidget     *child = (GtkWidget *)l->data;
2824
2825                 field = g_object_get_data (G_OBJECT (child), "form-field");
2826                 if (!field)
2827                         continue;
2828
2829                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2830                                                                              field->page->index);
2831                 ev_view_get_area_from_mapping (view, field->page->index,
2832                                                form_field_mapping,
2833                                                field, &view_area);
2834
2835                 gtk_widget_size_request (child, &child_requisition);
2836                 if (child_requisition.width != view_area.width ||
2837                     child_requisition.height != view_area.height)
2838                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2839
2840                 gtk_container_child_get (GTK_CONTAINER (widget),
2841                                          child,
2842                                          "x", &child_allocation.x,
2843                                          "y", &child_allocation.y,
2844                                          NULL);
2845                 if (child_allocation.x != view_area.x ||
2846                     child_allocation.y != view_area.y) {
2847                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2848                 }
2849         }
2850         g_list_free (children);
2851
2852         if (view->window_children)
2853                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2854                                        &root_x, &root_y);
2855
2856         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2857                 EvViewWindowChild *child;
2858                 EvRectangle        doc_rect;
2859                 GdkRectangle       view_rect;
2860
2861                 child = (EvViewWindowChild *)l->data;
2862
2863                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
2864                 if (child->moved) {
2865                         doc_rect.x1 = child->orig_x;
2866                         doc_rect.y1 = child->orig_y;
2867                 }
2868                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
2869                 view_rect.x -= view->scroll_x;
2870                 view_rect.y -= view->scroll_y;
2871
2872                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
2873                         child->parent_x = root_x;
2874                         child->parent_y = root_y;
2875                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
2876                 }
2877         }
2878 }
2879
2880 static void
2881 ev_view_realize (GtkWidget *widget)
2882 {
2883         EvView *view = EV_VIEW (widget);
2884
2885         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
2886                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
2887
2888         gdk_window_set_events (view->layout.bin_window,
2889                                (gdk_window_get_events (view->layout.bin_window) |
2890                                 GDK_EXPOSURE_MASK |
2891                                 GDK_BUTTON_PRESS_MASK |
2892                                 GDK_BUTTON_RELEASE_MASK |
2893                                 GDK_SCROLL_MASK |
2894                                 GDK_KEY_PRESS_MASK |
2895                                 GDK_POINTER_MOTION_MASK |
2896                                 GDK_POINTER_MOTION_HINT_MASK |
2897                                 GDK_ENTER_NOTIFY_MASK |
2898                                 GDK_LEAVE_NOTIFY_MASK));
2899
2900         if (view->presentation)
2901                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
2902         else
2903                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
2904 }
2905
2906 static gboolean
2907 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
2908 {
2909         EvView *view = EV_VIEW (widget);
2910         guint state;
2911
2912         state = event->state & gtk_accelerator_get_default_mod_mask ();
2913
2914         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
2915                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
2916
2917                 if (event->direction == GDK_SCROLL_UP ||
2918                     event->direction == GDK_SCROLL_LEFT) {
2919                         if (ev_view_can_zoom_in (view)) {
2920                                 ev_view_zoom_in (view);
2921                         }
2922                 } else {
2923                         if (ev_view_can_zoom_out (view)) {
2924                                 ev_view_zoom_out (view);
2925                         }
2926                 }
2927
2928                 return TRUE;
2929         }
2930
2931         view->jump_to_find_result = FALSE;
2932
2933         /* Shift+Wheel scrolls the in the perpendicular direction */
2934         if (state & GDK_SHIFT_MASK) {
2935                 if (event->direction == GDK_SCROLL_UP)
2936                         event->direction = GDK_SCROLL_LEFT;
2937                 else if (event->direction == GDK_SCROLL_LEFT)
2938                         event->direction = GDK_SCROLL_UP;
2939                 else if (event->direction == GDK_SCROLL_DOWN)
2940                         event->direction = GDK_SCROLL_RIGHT;
2941                 else if (event->direction == GDK_SCROLL_RIGHT)
2942                         event->direction = GDK_SCROLL_DOWN;
2943
2944                 event->state &= ~GDK_SHIFT_MASK;
2945                 state &= ~GDK_SHIFT_MASK;
2946         }
2947
2948         if (state == 0 &&
2949             (view->presentation ||
2950              (view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous))) {
2951                 switch (event->direction) {
2952                         case GDK_SCROLL_DOWN:
2953                         case GDK_SCROLL_RIGHT:
2954                                 ev_view_next_page (view);
2955                                 break;
2956                         case GDK_SCROLL_UP:
2957                         case GDK_SCROLL_LEFT:
2958                                 ev_view_previous_page (view);
2959                                 break;
2960                 }
2961
2962                 return TRUE;
2963         }
2964
2965         return FALSE;
2966 }
2967
2968 static EvViewSelection *
2969 find_selection_for_page (EvView *view,
2970                          gint    page)
2971 {
2972         GList *list;
2973
2974         for (list = view->selection_info.selections; list != NULL; list = list->next) {
2975                 EvViewSelection *selection;
2976
2977                 selection = (EvViewSelection *) list->data;
2978
2979                 if (selection->page == page)
2980                         return selection;
2981         }
2982
2983         return NULL;
2984 }
2985
2986 static void
2987 draw_end_presentation_page (EvView       *view,
2988                             GdkRectangle *page_area)
2989 {
2990         PangoLayout *layout;
2991         PangoFontDescription *font_desc;
2992         gchar *markup;
2993         const gchar *text = _("End of presentation. Press Escape to exit.");
2994
2995         if (view->presentation_state != EV_PRESENTATION_END)
2996                 return;
2997
2998         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
2999         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
3000         pango_layout_set_markup (layout, markup, -1);
3001         g_free (markup);
3002
3003         font_desc = pango_font_description_new ();
3004         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
3005         pango_layout_set_font_description (layout, font_desc);
3006
3007         gtk_paint_layout (GTK_WIDGET (view)->style,
3008                           view->layout.bin_window,
3009                           GTK_WIDGET_STATE (view),
3010                           FALSE,
3011                           page_area,
3012                           GTK_WIDGET (view),
3013                           NULL,
3014                           page_area->x + 15,
3015                           page_area->y + 15,
3016                           layout);
3017
3018         pango_font_description_free (font_desc);
3019         g_object_unref (layout);
3020 }
3021
3022 static gboolean
3023 ev_view_expose_event (GtkWidget      *widget,
3024                       GdkEventExpose *event)
3025 {
3026         EvView  *view = EV_VIEW (widget);
3027         cairo_t *cr;
3028         gint     i;
3029
3030         if (view->animation) {
3031                 if (ev_transition_animation_ready (view->animation)) {
3032                         GdkRectangle page_area;
3033                         GtkBorder    border;
3034
3035                         if (get_page_extents (view, view->current_page, &page_area, &border)) {
3036                                 cr = gdk_cairo_create (view->layout.bin_window);
3037
3038                                 /* normalize to x=0, y=0 */
3039                                 cairo_translate (cr, page_area.x, page_area.y);
3040                                 page_area.x = page_area.y = 0;
3041
3042                                 ev_transition_animation_paint (view->animation, cr, page_area);
3043                                 cairo_destroy (cr);
3044                         }
3045                 }
3046
3047                 return TRUE;
3048         }
3049
3050         if (view->presentation) {
3051                 switch (view->presentation_state) {
3052                         case EV_PRESENTATION_END: {
3053                                 GdkRectangle area = {0};
3054
3055                                 area.width = widget->allocation.width;
3056                                 area.height = widget->allocation.height;
3057
3058                                 draw_end_presentation_page (view, &area);
3059                         }
3060                                 return FALSE;
3061                         case EV_PRESENTATION_BLACK:
3062                         case EV_PRESENTATION_WHITE:
3063                                 return FALSE;
3064                         case EV_PRESENTATION_NORMAL:
3065                         default:
3066                                 break;
3067                 }
3068         } else if (view->loading) {
3069                 GdkRectangle area = {0};
3070
3071                 area.width = widget->allocation.width;
3072                 area.height = widget->allocation.height;
3073
3074                 draw_loading_text (view,
3075                                    &area,
3076                                    &(event->area));
3077         }
3078
3079         if (view->document == NULL)
3080                 return FALSE;
3081
3082         cr = gdk_cairo_create (view->layout.bin_window);
3083
3084         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3085                 GdkRectangle page_area;
3086                 GtkBorder border;
3087                 gboolean page_ready = TRUE;
3088
3089                 if (!get_page_extents (view, i, &page_area, &border))
3090                         continue;
3091
3092                 page_area.x -= view->scroll_x;
3093                 page_area.y -= view->scroll_y;
3094
3095                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
3096
3097                 if (page_ready && view->find_pages && view->highlight_find_results)
3098                         highlight_find_results (view, i);
3099                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3100                         show_annotation_windows (view, i);
3101         }
3102
3103         cairo_destroy (cr);
3104
3105         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3106                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3107
3108         return FALSE;
3109 }
3110
3111 static gboolean
3112 ev_view_do_popup_menu (EvView *view,
3113                        gdouble x,
3114                        gdouble y)
3115 {
3116         EvLink  *link;
3117         EvImage *image;
3118
3119         image = ev_view_get_image_at_location (view, x, y);
3120         if (image) {
3121                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
3122                 return TRUE;
3123         }
3124
3125         link = ev_view_get_link_at_location (view, x, y);
3126         if (link) {
3127                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
3128                 return TRUE;
3129         }
3130
3131         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
3132
3133         return TRUE;
3134 }
3135
3136 static gboolean
3137 ev_view_popup_menu (GtkWidget *widget)
3138 {
3139         gint x, y;
3140
3141         gtk_widget_get_pointer (widget, &x, &y);
3142         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3143 }
3144
3145 static void
3146 get_link_area (EvView       *view,
3147                gint          x,
3148                gint          y,
3149                EvLink       *link,
3150                GdkRectangle *area)
3151 {
3152         GList *link_mapping;
3153         gint   page;
3154         gint   x_offset = 0, y_offset = 0;
3155
3156         x += view->scroll_x;
3157         y += view->scroll_y;
3158
3159         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3160
3161         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
3162         ev_view_get_area_from_mapping (view, page,
3163                                        link_mapping,
3164                                        link, area);
3165 }
3166
3167 static void
3168 get_annot_area (EvView       *view,
3169                gint          x,
3170                gint          y,
3171                EvAnnotation *annot,
3172                GdkRectangle *area)
3173 {
3174         GList *annots_mapping;
3175         gint   page;
3176         gint   x_offset = 0, y_offset = 0;
3177
3178         x += view->scroll_x;
3179         y += view->scroll_y;
3180
3181         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3182
3183         annots_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
3184         ev_view_get_area_from_mapping (view, page,
3185                                        annots_mapping,
3186                                        annot, area);
3187 }
3188
3189 static gboolean
3190 ev_view_query_tooltip (GtkWidget  *widget,
3191                        gint        x,
3192                        gint        y,
3193                        gboolean    keyboard_tip,
3194                        GtkTooltip *tooltip)
3195 {
3196         EvView       *view = EV_VIEW (widget);
3197         EvLink       *link;
3198         EvAnnotation *annot;
3199         gchar        *text;
3200
3201         annot = ev_view_get_annotation_at_location (view, x, y);
3202         if (annot && annot->contents) {
3203                 GdkRectangle annot_area;
3204
3205                 get_annot_area (view, x, y, annot, &annot_area);
3206                 gtk_tooltip_set_text (tooltip, annot->contents);
3207                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
3208
3209                 return TRUE;
3210         }
3211
3212         link = ev_view_get_link_at_location (view, x, y);
3213         if (!link)
3214                 return FALSE;
3215
3216         text = tip_from_link (view, link);
3217         if (text && g_utf8_validate (text, -1, NULL)) {
3218                 GdkRectangle link_area;
3219
3220                 get_link_area (view, x, y, link, &link_area);
3221                 gtk_tooltip_set_text (tooltip, text);
3222                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3223         }
3224         g_free (text);
3225
3226         return TRUE;
3227 }
3228
3229 static void
3230 start_selection_for_event (EvView         *view,
3231                            GdkEventButton *event)
3232 {
3233         clear_selection (view);
3234
3235         view->selection_info.start.x = event->x + view->scroll_x;
3236         view->selection_info.start.y = event->y + view->scroll_y;
3237
3238         switch (event->type) {
3239                 case GDK_2BUTTON_PRESS:
3240                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3241                         break;
3242                 case GDK_3BUTTON_PRESS:
3243                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3244                         break;
3245                 default:
3246                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3247                         return;
3248         }
3249
3250         /* In case of WORD or LINE, compute selections now */
3251         compute_selections (view,
3252                             view->selection_info.style,
3253                             &(view->selection_info.start),
3254                             &(view->selection_info.start));
3255 }
3256
3257 static gboolean
3258 ev_view_button_press_event (GtkWidget      *widget,
3259                             GdkEventButton *event)
3260 {
3261         EvView *view = EV_VIEW (widget);
3262
3263         if (!view->document)
3264                 return FALSE;
3265
3266         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3267                 gtk_widget_grab_focus (widget);
3268         }
3269
3270         if (view->window_child_focus) {
3271                 EvAnnotationWindow *window;
3272                 EvAnnotation       *annot;
3273
3274                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3275                 annot = ev_annotation_window_get_annotation (window);
3276                 ev_annotation_window_ungrab_focus (window);
3277                 ev_view_annotation_save (view, annot);
3278                 view->window_child_focus = NULL;
3279         }
3280
3281         view->pressed_button = event->button;
3282         view->selection_info.in_drag = FALSE;
3283
3284         if (view->scroll_info.autoscrolling)
3285                 return TRUE;
3286
3287         switch (event->button) {
3288                 case 1: {
3289                         EvImage *image;
3290                         EvAnnotation *annot;
3291                         EvFormField *field;
3292
3293                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3294                                 if (event->type == GDK_3BUTTON_PRESS) {
3295                                         start_selection_for_event (view, event);
3296                                 } else if (location_in_selected_text (view,
3297                                                                event->x + view->scroll_x,
3298                                                                event->y + view->scroll_y)) {
3299                                         view->selection_info.in_drag = TRUE;
3300                                 } else {
3301                                         start_selection_for_event (view, event);
3302                                 }
3303
3304                                 gtk_widget_queue_draw (widget);
3305                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3306                                 ev_view_handle_annotation (view, annot, event->x, event->y);
3307                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3308                                 ev_view_remove_all (view);
3309                                 ev_view_handle_form_field (view, field, event->x, event->y);
3310                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3311                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3312                                 if (view->image_dnd_info.image)
3313                                         g_object_unref (view->image_dnd_info.image);
3314                                 view->image_dnd_info.image = g_object_ref (image);
3315                                 view->image_dnd_info.in_drag = TRUE;
3316
3317                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3318                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3319                         } else {
3320                                 ev_view_remove_all (view);
3321
3322                                 if (EV_IS_SELECTION (view->document))
3323                                         start_selection_for_event (view, event);
3324                         }
3325                 }
3326                         return TRUE;
3327                 case 2:
3328                         /* use root coordinates as reference point because
3329                          * scrolling changes window relative coordinates */
3330                         view->drag_info.start.x = event->x_root;
3331                         view->drag_info.start.y = event->y_root;
3332                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3333                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3334
3335                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3336
3337                         return TRUE;
3338                 case 3:
3339                         view->scroll_info.start_y = event->y;
3340                         return ev_view_do_popup_menu (view, event->x, event->y);
3341         }
3342
3343         return FALSE;
3344 }
3345
3346 static void
3347 ev_view_remove_all (EvView *view)
3348 {
3349         GList *children, *child;
3350
3351         children = gtk_container_get_children (GTK_CONTAINER (view));
3352         for (child = children; child && child->data; child = g_list_next (child)) {
3353                 gtk_container_remove (GTK_CONTAINER (view),
3354                                       GTK_WIDGET (child->data));
3355         }
3356         g_list_free (children);
3357 }
3358
3359 /*** Drag and Drop ***/
3360 static void
3361 ev_view_drag_data_get (GtkWidget        *widget,
3362                        GdkDragContext   *context,
3363                        GtkSelectionData *selection_data,
3364                        guint             info,
3365                        guint             time)
3366 {
3367         EvView *view = EV_VIEW (widget);
3368
3369         switch (info) {
3370                 case TARGET_DND_TEXT:
3371                         if (EV_IS_SELECTION (view->document) &&
3372                             view->selection_info.selections) {
3373                                 gchar *text;
3374
3375                                 text = get_selected_text (view);
3376                                 gtk_selection_data_set_text (selection_data,
3377                                                              text,
3378                                                              strlen (text));
3379                                 g_free (text);
3380                         }
3381                         break;
3382                 case TARGET_DND_IMAGE:
3383                         if (view->image_dnd_info.image) {
3384                                 GdkPixbuf *pixbuf;
3385
3386                                 ev_document_doc_mutex_lock ();
3387                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3388                                                                        view->image_dnd_info.image);
3389                                 ev_document_doc_mutex_unlock ();
3390
3391                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3392                                 g_object_unref (pixbuf);
3393                         }
3394                         break;
3395                 case TARGET_DND_URI:
3396                         if (view->image_dnd_info.image) {
3397                                 GdkPixbuf   *pixbuf;
3398                                 const gchar *tmp_uri;
3399                                 gchar       *uris[2];
3400
3401                                 ev_document_doc_mutex_lock ();
3402                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3403                                                                        view->image_dnd_info.image);
3404                                 ev_document_doc_mutex_unlock ();
3405
3406                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3407                                 g_object_unref (pixbuf);
3408
3409                                 uris[0] = (gchar *)tmp_uri;
3410                                 uris[1] = NULL;
3411                                 gtk_selection_data_set_uris (selection_data, uris);
3412                         }
3413         }
3414 }
3415
3416 static gboolean
3417 ev_view_drag_motion (GtkWidget      *widget,
3418                      GdkDragContext *context,
3419                      gint            x,
3420                      gint            y,
3421                      guint           time)
3422 {
3423         if (gtk_drag_get_source_widget (context) == widget)
3424                 gdk_drag_status (context, 0, time);
3425         else
3426                 gdk_drag_status (context, context->suggested_action, time);
3427
3428         return TRUE;
3429 }
3430
3431 static gboolean
3432 selection_update_idle_cb (EvView *view)
3433 {
3434         compute_selections (view,
3435                             view->selection_info.style,
3436                             &view->selection_info.start,
3437                             &view->motion);
3438         view->selection_update_id = 0;
3439         return FALSE;
3440 }
3441
3442 static gboolean
3443 selection_scroll_timeout_cb (EvView *view)
3444 {
3445         gint x, y, shift = 0;
3446         GtkWidget *widget = GTK_WIDGET (view);
3447
3448         gtk_widget_get_pointer (widget, &x, &y);
3449
3450         if (y > widget->allocation.height) {
3451                 shift = (y - widget->allocation.height) / 2;
3452         } else if (y < 0) {
3453                 shift = y / 2;
3454         }
3455
3456         if (shift)
3457                 gtk_adjustment_set_value (view->vadjustment,
3458                                           CLAMP (view->vadjustment->value + shift,
3459                                           view->vadjustment->lower,
3460                                           view->vadjustment->upper -
3461                                           view->vadjustment->page_size));
3462
3463         if (x > widget->allocation.width) {
3464                 shift = (x - widget->allocation.width) / 2;
3465         } else if (x < 0) {
3466                 shift = x / 2;
3467         }
3468
3469         if (shift)
3470                 gtk_adjustment_set_value (view->hadjustment,
3471                                           CLAMP (view->hadjustment->value + shift,
3472                                           view->hadjustment->lower,
3473                                           view->hadjustment->upper -
3474                                           view->hadjustment->page_size));
3475
3476         return TRUE;
3477 }
3478
3479 static gboolean
3480 ev_view_drag_update_momentum (EvView *view)
3481 {
3482         int i;
3483         if (!view->drag_info.in_drag)
3484                 return FALSE;
3485
3486         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3487                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3488                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3489         }
3490
3491         /* Momentum is a moving average of 10ms granularity over
3492          * the last 100ms with each 10ms stored in buffer.
3493          */
3494
3495         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3496         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3497
3498         return TRUE;
3499 }
3500
3501 static gboolean
3502 ev_view_scroll_drag_release (EvView *view)
3503 {
3504         gdouble dhadj_value, dvadj_value;
3505         gdouble oldhadjustment, oldvadjustment;
3506
3507         view->drag_info.momentum.x /= 1.2;
3508         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3509
3510         dhadj_value = view->hadjustment->page_size *
3511                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
3512         dvadj_value = view->vadjustment->page_size *
3513                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
3514
3515         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3516         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3517
3518      /* When we reach the edges, we need either to absorb some momentum and bounce by
3519       * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3520      if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
3521            ((oldhadjustment + dhadj_value) < 0))
3522                 view->drag_info.momentum.x = 0;
3523         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
3524            ((oldvadjustment + dvadj_value) < 0))
3525                 view->drag_info.momentum.y = 0;
3526
3527         gtk_adjustment_set_value (view->hadjustment,
3528                                 MIN (oldhadjustment + dhadj_value,
3529                                 view->hadjustment->upper - view->hadjustment->page_size));
3530         gtk_adjustment_set_value (view->vadjustment,
3531                                 MIN (oldvadjustment + dvadj_value,
3532                                 view->vadjustment->upper - view->vadjustment->page_size));
3533
3534         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3535            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3536                 return FALSE;
3537         else
3538                 return TRUE;
3539 }
3540
3541 static gboolean
3542 ev_view_motion_notify_event (GtkWidget      *widget,
3543                              GdkEventMotion *event)
3544 {
3545         EvView *view = EV_VIEW (widget);
3546         gint x, y;
3547
3548         if (!view->document)
3549                 return FALSE;
3550
3551
3552         if (event->is_hint || event->window != view->layout.bin_window) {
3553             gtk_widget_get_pointer (widget, &x, &y);
3554         } else {
3555             x = event->x;
3556             y = event->y;
3557         }
3558
3559         if (view->scroll_info.autoscrolling) {
3560                 view->scroll_info.last_y = y;
3561                 return TRUE;
3562         }
3563
3564         if (view->selection_info.in_drag) {
3565                 if (gtk_drag_check_threshold (widget,
3566                                               view->selection_info.start.x,
3567                                               view->selection_info.start.y,
3568                                               x, y)) {
3569                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3570
3571                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3572
3573                         gtk_drag_begin (widget, target_list,
3574                                         GDK_ACTION_COPY,
3575                                         1, (GdkEvent *)event);
3576
3577                         view->selection_info.in_drag = FALSE;
3578
3579                         gtk_target_list_unref (target_list);
3580
3581                         return TRUE;
3582                 }
3583         } else if (view->image_dnd_info.in_drag) {
3584                 if (gtk_drag_check_threshold (widget,
3585                                               view->selection_info.start.x,
3586                                               view->selection_info.start.y,
3587                                               x, y)) {
3588                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3589
3590                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3591                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3592
3593                         gtk_drag_begin (widget, target_list,
3594                                         GDK_ACTION_COPY,
3595                                         1, (GdkEvent *)event);
3596
3597                         view->image_dnd_info.in_drag = FALSE;
3598
3599                         gtk_target_list_unref (target_list);
3600
3601                         return TRUE;
3602                 }
3603         }
3604
3605         switch (view->pressed_button) {
3606         case 1:
3607                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3608                  * documents only.
3609                  */
3610                 if (view->rotation != 0)
3611                         return FALSE;
3612
3613                 /* Schedule timeout to scroll during selection and additionally
3614                  * scroll once to allow arbitrary speed. */
3615                 if (!view->selection_scroll_id)
3616                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3617                                                                (GSourceFunc)selection_scroll_timeout_cb,
3618                                                                view);
3619                 else
3620                     selection_scroll_timeout_cb (view);
3621
3622                 view->selection_info.in_selection = TRUE;
3623                 view->motion.x = x + view->scroll_x;
3624                 view->motion.y = y + view->scroll_y;
3625
3626                 /* Queue an idle to handle the motion.  We do this because
3627                  * handling any selection events in the motion could be slower
3628                  * than new motion events reach us.  We always put it in the
3629                  * idle to make sure we catch up and don't visibly lag the
3630                  * mouse. */
3631                 if (!view->selection_update_id)
3632                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3633
3634                 return TRUE;
3635         case 2:
3636                 if (!view->drag_info.in_drag) {
3637                         gboolean start;
3638                         int i;
3639
3640                         start = gtk_drag_check_threshold (widget,
3641                                                           view->drag_info.start.x,
3642                                                           view->drag_info.start.y,
3643                                                           event->x_root,
3644                                                           event->y_root);
3645                         view->drag_info.in_drag = start;
3646                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3647                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3648                         /* Set 100 to choose how long it takes to build up momentum */
3649                         /* Clear out previous momentum info: */
3650                         for (i = 0; i < DRAG_HISTORY; i++) {
3651                                 view->drag_info.buffer[i].x = event->x;
3652                                 view->drag_info.buffer[i].y = event->y;
3653                         }
3654                         view->drag_info.momentum.x = 0;
3655                         view->drag_info.momentum.y = 0;
3656                 }
3657
3658                 if (view->drag_info.in_drag) {
3659                         int dx, dy;
3660                         gdouble dhadj_value, dvadj_value;
3661
3662                         view->drag_info.buffer[0].x = event->x;
3663                         view->drag_info.buffer[0].y = event->y;
3664
3665                         dx = event->x_root - view->drag_info.start.x;
3666                         dy = event->y_root - view->drag_info.start.y;
3667
3668                         dhadj_value = view->hadjustment->page_size *
3669                                       (gdouble)dx / widget->allocation.width;
3670                         dvadj_value = view->vadjustment->page_size *
3671                                       (gdouble)dy / widget->allocation.height;
3672
3673                         /* clamp scrolling to visible area */
3674                         gtk_adjustment_set_value (view->hadjustment,
3675                                                   MIN(view->drag_info.hadj - dhadj_value,
3676                                                       view->hadjustment->upper -
3677                                                       view->hadjustment->page_size));
3678                         gtk_adjustment_set_value (view->vadjustment,
3679                                                   MIN(view->drag_info.vadj - dvadj_value,
3680                                                       view->vadjustment->upper -
3681                                                       view->vadjustment->page_size));
3682
3683                         return TRUE;
3684                 }
3685
3686                 break;
3687         default:
3688                 ev_view_handle_cursor_over_xy (view, x, y);
3689         }
3690
3691         return FALSE;
3692 }
3693
3694 static gboolean
3695 ev_view_button_release_event (GtkWidget      *widget,
3696                               GdkEventButton *event)
3697 {
3698         EvView *view = EV_VIEW (widget);
3699         EvLink *link = NULL;
3700
3701         view->image_dnd_info.in_drag = FALSE;
3702
3703         if (view->scroll_info.autoscrolling) {
3704                 ev_view_autoscroll_stop (view);
3705                 view->pressed_button = -1;
3706
3707                 return TRUE;
3708         }
3709
3710         if (view->drag_info.in_drag) {
3711                 view->drag_info.release_timeout_id =
3712                         g_timeout_add (20,
3713                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3714         }
3715
3716         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3717                 link = ev_view_get_link_at_location (view, event->x, event->y);
3718         }
3719
3720         view->drag_info.in_drag = FALSE;
3721
3722         if (view->pressed_button == 2) {
3723                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3724         }
3725
3726         view->pressed_button = -1;
3727
3728         if (view->selection_scroll_id) {
3729             g_source_remove (view->selection_scroll_id);
3730             view->selection_scroll_id = 0;
3731         }
3732         if (view->selection_update_id) {
3733             g_source_remove (view->selection_update_id);
3734             view->selection_update_id = 0;
3735         }
3736
3737         if (view->selection_info.selections) {
3738                 clear_link_selected (view);
3739                 ev_view_update_primary_selection (view);
3740
3741                 if (view->selection_info.in_drag) {
3742                         clear_selection (view);
3743                         gtk_widget_queue_draw (widget);
3744                 }
3745
3746                 view->selection_info.in_drag = FALSE;
3747         } else if (link) {
3748                 if (event->button == 2) {
3749                         EvLinkAction    *action;
3750                         EvLinkActionType type;
3751
3752                         action = ev_link_get_action (link);
3753                         if (!action)
3754                                 return FALSE;
3755
3756                         type = ev_link_action_get_action_type (action);
3757                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3758                                 g_signal_emit (view,
3759                                                signals[SIGNAL_EXTERNAL_LINK],
3760                                                0, action);
3761                         }
3762                 } else {
3763                         ev_view_handle_link (view, link);
3764                 }
3765         } else if (view->presentation) {
3766                 switch (event->button) {
3767                         case 1:
3768                                 ev_view_next_page (view);
3769                                 return TRUE;
3770                         case 3:
3771                                 ev_view_previous_page (view);
3772                                 return TRUE;
3773                 }
3774         }
3775
3776         return FALSE;
3777 }
3778
3779 /* Goto Window */
3780 /* Cut and paste from gtkwindow.c */
3781 static void
3782 send_focus_change (GtkWidget *widget,
3783                    gboolean   in)
3784 {
3785         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3786
3787         g_object_ref (widget);
3788
3789         if (in)
3790                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3791         else
3792                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3793
3794         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3795         fevent->focus_change.window = g_object_ref (widget->window);
3796         fevent->focus_change.in = in;
3797
3798         gtk_widget_event (widget, fevent);
3799
3800         g_object_notify (G_OBJECT (widget), "has-focus");
3801
3802         g_object_unref (widget);
3803         gdk_event_free (fevent);
3804 }
3805
3806 static void
3807 ev_view_goto_window_hide (EvView *view)
3808 {
3809         /* send focus-in event */
3810         send_focus_change (view->goto_entry, FALSE);
3811         gtk_widget_hide (view->goto_window);
3812         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3813 }
3814
3815 static gboolean
3816 ev_view_goto_window_delete_event (GtkWidget   *widget,
3817                                   GdkEventAny *event,
3818                                   EvView      *view)
3819 {
3820         ev_view_goto_window_hide (view);
3821
3822         return TRUE;
3823 }
3824
3825 static gboolean
3826 key_is_numeric (guint keyval)
3827 {
3828         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3829                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3830 }
3831
3832 static gboolean
3833 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3834                                      GdkEventKey *event,
3835                                      EvView      *view)
3836 {
3837         switch (event->keyval) {
3838                 case GDK_Escape:
3839                 case GDK_Tab:
3840                 case GDK_KP_Tab:
3841                 case GDK_ISO_Left_Tab:
3842                         ev_view_goto_window_hide (view);
3843                         return TRUE;
3844                 case GDK_Return:
3845                 case GDK_KP_Enter:
3846                 case GDK_ISO_Enter:
3847                 case GDK_BackSpace:
3848                 case GDK_Delete:
3849                         return FALSE;
3850                 default:
3851                         if (!key_is_numeric (event->keyval))
3852                                 return TRUE;
3853         }
3854
3855         return FALSE;
3856 }
3857
3858 static gboolean
3859 ev_view_goto_window_button_press_event (GtkWidget      *widget,
3860                                         GdkEventButton *event,
3861                                         EvView         *view)
3862 {
3863         ev_view_goto_window_hide (view);
3864
3865         return TRUE;
3866 }
3867
3868 static void
3869 ev_view_goto_entry_activate (GtkEntry *entry,
3870                              EvView   *view)
3871 {
3872         const gchar *text;
3873         gint         page;
3874
3875         text = gtk_entry_get_text (entry);
3876         page = atoi (text) - 1;
3877
3878         ev_view_goto_window_hide (view);
3879
3880         if (page >= 0 && page < ev_document_get_n_pages (view->document)) {
3881                 ev_document_model_set_page (view->model, page);
3882         }
3883 }
3884
3885 static void
3886 ev_view_goto_window_create (EvView *view)
3887 {
3888         GtkWidget *frame, *hbox, *toplevel, *label;
3889
3890         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
3891
3892         if (view->goto_window) {
3893                 if (GTK_WINDOW (toplevel)->group)
3894                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3895                                                      GTK_WINDOW (view->goto_window));
3896                 else if (GTK_WINDOW (view->goto_window)->group)
3897                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
3898                                                         GTK_WINDOW (view->goto_window));
3899                 return;
3900         }
3901
3902         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
3903         gtk_window_set_screen (GTK_WINDOW (view->goto_window),
3904                                gtk_widget_get_screen (GTK_WIDGET (view)));
3905
3906         if (GTK_WINDOW (toplevel)->group)
3907                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3908                                              GTK_WINDOW (view->goto_window));
3909
3910         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
3911
3912         g_signal_connect (view->goto_window, "delete_event",
3913                           G_CALLBACK (ev_view_goto_window_delete_event),
3914                           view);
3915         g_signal_connect (view->goto_window, "key_press_event",
3916                           G_CALLBACK (ev_view_goto_window_key_press_event),
3917                           view);
3918         g_signal_connect (view->goto_window, "button_press_event",
3919                           G_CALLBACK (ev_view_goto_window_button_press_event),
3920                           view);
3921
3922         frame = gtk_frame_new (NULL);
3923         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
3924         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
3925         gtk_widget_show (frame);
3926
3927         hbox = gtk_hbox_new (FALSE, 0);
3928         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
3929         gtk_container_add (GTK_CONTAINER (frame), hbox);
3930         gtk_widget_show (hbox);
3931
3932         label = gtk_label_new(_("Jump to page:"));
3933         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
3934         gtk_widget_show (label);
3935         gtk_widget_realize (label);
3936
3937         view->goto_entry = gtk_entry_new ();
3938         g_signal_connect (view->goto_entry, "activate",
3939                           G_CALLBACK (ev_view_goto_entry_activate),
3940                           view);
3941         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
3942         gtk_widget_show (view->goto_entry);
3943         gtk_widget_realize (view->goto_entry);
3944 }
3945
3946 static void
3947 ev_view_goto_entry_grab_focus (EvView *view)
3948 {
3949         GtkWidgetClass *entry_parent_class;
3950
3951         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
3952         (entry_parent_class->grab_focus) (view->goto_entry);
3953
3954         send_focus_change (view->goto_entry, TRUE);
3955 }
3956
3957 static void
3958 ev_view_goto_window_send_key_event (EvView   *view,
3959                                     GdkEvent *event)
3960 {
3961         GdkEventKey *new_event;
3962         GdkScreen   *screen;
3963
3964         /* Move goto window off screen */
3965         screen = gtk_widget_get_screen (GTK_WIDGET (view));
3966         gtk_window_move (GTK_WINDOW (view->goto_window),
3967                          gdk_screen_get_width (screen) + 1,
3968                          gdk_screen_get_height (screen) + 1);
3969         gtk_widget_show (view->goto_window);
3970
3971         new_event = (GdkEventKey *) gdk_event_copy (event);
3972         g_object_unref (new_event->window);
3973         new_event->window = g_object_ref (view->goto_window->window);
3974         gtk_widget_realize (view->goto_window);
3975
3976         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
3977         gdk_event_free ((GdkEvent *)new_event);
3978         gtk_widget_hide (view->goto_window);
3979 }
3980
3981 static gboolean
3982 ev_view_key_press_event (GtkWidget   *widget,
3983                          GdkEventKey *event)
3984 {
3985         EvView *view = EV_VIEW (widget);
3986         EvPresentationState current;
3987
3988         if (!view->document)
3989                 return FALSE;
3990
3991         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3992                 /* Forward key events to current focused window child */
3993                 if (view->window_child_focus) {
3994                         GdkEventKey *new_event;
3995                         gboolean     handled;
3996
3997                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
3998                         g_object_unref (new_event->window);
3999                         new_event->window = g_object_ref (view->window_child_focus->window->window);
4000                         gtk_widget_realize (view->window_child_focus->window);
4001                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
4002                         gdk_event_free ((GdkEvent *)new_event);
4003
4004                         return handled;
4005                 }
4006
4007                 return FALSE;
4008         }
4009
4010         if (!view->presentation ||
4011             view->presentation_state == EV_PRESENTATION_END)
4012                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4013
4014
4015         current = view->presentation_state;
4016
4017         switch (event->keyval) {
4018                 case GDK_b:
4019                 case GDK_B:
4020                 case GDK_period:
4021                 case GDK_KP_Decimal:
4022                         view->presentation_state =
4023                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
4024                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
4025                         break;
4026                 case GDK_w:
4027                 case GDK_W:
4028                         view->presentation_state =
4029                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
4030                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
4031                         break;
4032                 default:
4033                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
4034                             view->presentation_state == EV_PRESENTATION_WHITE) {
4035                                 view->presentation_state = EV_PRESENTATION_NORMAL;
4036                         }
4037         }
4038
4039         if (current == view->presentation_state) {
4040                 if (ev_document_get_n_pages (view->document) > 1 &&
4041                     key_is_numeric (event->keyval)) {
4042                         gint x, y;
4043
4044                         ev_view_goto_window_create (view);
4045                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
4046                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4047                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
4048                         gtk_widget_show (view->goto_window);
4049                         ev_view_goto_entry_grab_focus (view);
4050
4051                         return TRUE;
4052                 }
4053
4054                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4055         }
4056
4057         switch (view->presentation_state) {
4058                 case EV_PRESENTATION_NORMAL:
4059                 case EV_PRESENTATION_BLACK:
4060                         gdk_window_set_background (view->layout.bin_window,
4061                                                    &widget->style->black);
4062                         break;
4063                 case EV_PRESENTATION_WHITE:
4064                         gdk_window_set_background (view->layout.bin_window,
4065                                                    &widget->style->white);
4066                         break;
4067                 default:
4068                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4069         }
4070
4071         gtk_widget_queue_draw (widget);
4072         return TRUE;
4073 }
4074
4075 static gint
4076 ev_view_focus_in (GtkWidget     *widget,
4077                   GdkEventFocus *event)
4078 {
4079         if (EV_VIEW (widget)->pixbuf_cache)
4080                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4081         gtk_widget_queue_draw (widget);
4082
4083         return FALSE;
4084 }
4085
4086 static gint
4087 ev_view_focus_out (GtkWidget     *widget,
4088                      GdkEventFocus *event)
4089 {
4090         if (EV_VIEW (widget)->goto_window)
4091                 ev_view_goto_window_hide (EV_VIEW (widget));
4092
4093         if (EV_VIEW (widget)->pixbuf_cache)
4094                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4095         gtk_widget_queue_draw (widget);
4096
4097         return FALSE;
4098 }
4099
4100 static gboolean
4101 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4102 {
4103         EvView *view = EV_VIEW (widget);
4104
4105         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4106                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4107
4108         return FALSE;
4109 }
4110
4111 static gboolean
4112 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4113 {
4114         EvView *view = EV_VIEW (widget);
4115
4116         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4117
4118         return FALSE;
4119 }
4120
4121 static void
4122 ev_view_style_set (GtkWidget *widget,
4123                    GtkStyle  *old_style)
4124 {
4125         if (EV_VIEW (widget)->pixbuf_cache)
4126                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4127
4128         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
4129 }
4130
4131 /*** Drawing ***/
4132
4133 static guint32
4134 ev_gdk_color_to_rgb (const GdkColor *color)
4135 {
4136   guint32 result;
4137   result = (0xff0000 | (color->red & 0xff00));
4138   result <<= 8;
4139   result |= ((color->green & 0xff00) | (color->blue >> 8));
4140   return result;
4141 }
4142
4143 static void
4144 draw_rubberband (GtkWidget *widget, GdkWindow *window,
4145                  const GdkRectangle *rect, guchar alpha)
4146 {
4147         GdkGC *gc;
4148         GdkPixbuf *pixbuf;
4149         GdkColor *fill_color_gdk;
4150         guint fill_color;
4151
4152         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
4153         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
4154
4155         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
4156                                  rect->width, rect->height);
4157         gdk_pixbuf_fill (pixbuf, fill_color);
4158
4159         gdk_draw_pixbuf (window, NULL, pixbuf,
4160                          0, 0,
4161                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4162                          rect->width, rect->height,
4163                          GDK_RGB_DITHER_NONE,
4164                          0, 0);
4165
4166         g_object_unref (pixbuf);
4167
4168         gc = gdk_gc_new (window);
4169         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
4170         gdk_draw_rectangle (window, gc, FALSE,
4171                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4172                             rect->width - 1,
4173                             rect->height - 1);
4174         g_object_unref (gc);
4175
4176         gdk_color_free (fill_color_gdk);
4177 }
4178
4179
4180 static void
4181 highlight_find_results (EvView *view, int page)
4182 {
4183         gint i, n_results = 0;
4184
4185         n_results = ev_view_find_get_n_results (view, page);
4186
4187         for (i = 0; i < n_results; i++) {
4188                 EvRectangle *rectangle;
4189                 GdkRectangle view_rectangle;
4190                 guchar alpha;
4191
4192                 if (i == view->find_result && page == view->current_page) {
4193                         alpha = 0x90;
4194                 } else {
4195                         alpha = 0x20;
4196                 }
4197
4198                 rectangle = ev_view_find_get_result (view, page, i);
4199                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4200                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
4201                                  &view_rectangle, alpha);
4202         }
4203 }
4204
4205 static void
4206 draw_loading_text (EvView       *view,
4207                    GdkRectangle *page_area,
4208                    GdkRectangle *expose_area)
4209 {
4210         cairo_t *cr;
4211         gint     width, height;
4212
4213         if (!view->loading_text) {
4214                 const gchar *loading_text = _("Loading...");
4215                 PangoLayout *layout;
4216                 PangoFontDescription *font_desc;
4217                 PangoRectangle logical_rect;
4218                 gint target_width;
4219                 gdouble real_scale;
4220
4221                 ev_document_fc_mutex_lock ();
4222
4223                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
4224
4225                 font_desc = pango_font_description_new ();
4226
4227                 /* We set the font to be 10 points, get the size, and scale appropriately */
4228                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
4229                 pango_layout_set_font_description (layout, font_desc);
4230                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4231
4232                 target_width = MAX (page_area->width / 2, 1);
4233                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
4234                 pango_font_description_set_size (font_desc, (int)real_scale);
4235                 pango_layout_set_font_description (layout, font_desc);
4236                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4237
4238                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
4239                                                                  logical_rect.width,
4240                                                                  logical_rect.height);
4241                 cr = cairo_create (view->loading_text);
4242                 cairo_set_source_rgb (cr,
4243                                       155 / (double)255,
4244                                       155 / (double)255,
4245                                       155 / (double)255);
4246                 pango_cairo_show_layout (cr, layout);
4247                 cairo_destroy (cr);
4248
4249                 pango_font_description_free (font_desc);
4250                 g_object_unref (layout);
4251
4252                 ev_document_fc_mutex_unlock ();
4253         }
4254
4255         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
4256         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
4257
4258         cr = gdk_cairo_create (view->layout.bin_window);
4259         cairo_translate (cr,
4260                          page_area->x + width,
4261                          page_area->y + height);
4262         cairo_set_source_surface (cr, view->loading_text, 0, 0);
4263         cairo_paint (cr);
4264         cairo_destroy (cr);
4265 }
4266
4267 static void
4268 draw_one_page (EvView       *view,
4269                gint          page,
4270                cairo_t      *cr,
4271                GdkRectangle *page_area,
4272                GtkBorder    *border,
4273                GdkRectangle *expose_area,
4274                gboolean     *page_ready)
4275 {
4276         GdkRectangle overlap;
4277         GdkRectangle real_page_area;
4278
4279         g_assert (view->document);
4280
4281         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4282                 return;
4283
4284         /* Render the document itself */
4285         real_page_area = *page_area;
4286
4287         real_page_area.x += border->left;
4288         real_page_area.y += border->top;
4289         real_page_area.width -= (border->left + border->right);
4290         real_page_area.height -= (border->top + border->bottom);
4291         *page_ready = TRUE;
4292
4293         if (!view->presentation) {
4294                 gint current_page;
4295
4296                 current_page = ev_document_model_get_page (view->model);
4297                 ev_document_misc_paint_one_page (view->layout.bin_window,
4298                                                  GTK_WIDGET (view),
4299                                                  page_area, border,
4300                                                  page == current_page);
4301         }
4302
4303         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4304                 gint             width, height;
4305                 gint             page_width, page_height;
4306                 cairo_surface_t *page_surface = NULL;
4307                 gint             selection_width, selection_height;
4308                 cairo_surface_t *selection_surface = NULL;
4309
4310                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4311
4312                 if (!page_surface) {
4313                         if (!view->presentation) {
4314                                 draw_loading_text (view,
4315                                                    &real_page_area,
4316                                                    expose_area);
4317                         }
4318
4319                         *page_ready = FALSE;
4320
4321                         return;
4322                 }
4323
4324                 ev_view_get_page_size (view, page, &width, &height);
4325
4326                 page_width = cairo_image_surface_get_width (page_surface);
4327                 page_height = cairo_image_surface_get_height (page_surface);
4328
4329                 cairo_save (cr);
4330                 cairo_translate (cr, overlap.x, overlap.y);
4331
4332                 if (width != page_width || height != page_height) {
4333                         cairo_pattern_set_filter (cairo_get_source (cr),
4334                                                   CAIRO_FILTER_FAST);
4335                         cairo_scale (cr,
4336                                      (gdouble)width / page_width,
4337                                      (gdouble)height / page_height);
4338                 }
4339
4340                 cairo_surface_set_device_offset (page_surface,
4341                                                  overlap.x - real_page_area.x,
4342                                                  overlap.y - real_page_area.y);
4343                 cairo_set_source_surface (cr, page_surface, 0, 0);
4344                 cairo_paint (cr);
4345                 cairo_restore (cr);
4346
4347                 /* Get the selection pixbuf iff we have something to draw */
4348                 if (find_selection_for_page (view, page) &&
4349                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4350                         selection_surface =
4351                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4352                                                                        page,
4353                                                                        view->scale,
4354                                                                        NULL);
4355                 }
4356
4357                 if (!selection_surface) {
4358                         return;
4359                 }
4360
4361                 selection_width = cairo_image_surface_get_width (selection_surface);
4362                 selection_height = cairo_image_surface_get_height (selection_surface);
4363
4364                 cairo_save (cr);
4365                 cairo_translate (cr, overlap.x, overlap.y);
4366
4367                 if (width != selection_width || height != selection_height) {
4368                         cairo_pattern_set_filter (cairo_get_source (cr),
4369                                                   CAIRO_FILTER_FAST);
4370                         cairo_scale (cr,
4371                                      (gdouble)width / selection_width,
4372                                      (gdouble)height / selection_height);
4373                 }
4374
4375                 cairo_surface_set_device_offset (selection_surface,
4376                                                  overlap.x - real_page_area.x,
4377                                                  overlap.y - real_page_area.y);
4378                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4379                 cairo_paint (cr);
4380                 cairo_restore (cr);
4381         }
4382 }
4383
4384 /*** GObject functions ***/
4385
4386 static void
4387 ev_view_finalize (GObject *object)
4388 {
4389         EvView *view = EV_VIEW (object);
4390
4391         clear_selection (view);
4392         clear_link_selected (view);
4393
4394         if (view->image_dnd_info.image)
4395                 g_object_unref (view->image_dnd_info.image);
4396         view->image_dnd_info.image = NULL;
4397
4398         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4399 }
4400
4401 static void
4402 ev_view_destroy (GtkObject *object)
4403 {
4404         EvView *view = EV_VIEW (object);
4405
4406         if (view->model) {
4407                 g_object_unref (view->model);
4408                 view->model = NULL;
4409         }
4410
4411         if (view->document) {
4412                 g_object_unref (view->document);
4413                 view->document = NULL;
4414         }
4415
4416         if (view->pixbuf_cache) {
4417                 g_object_unref (view->pixbuf_cache);
4418                 view->pixbuf_cache = NULL;
4419         }
4420
4421         if (view->goto_window) {
4422                 gtk_widget_destroy (view->goto_window);
4423                 view->goto_window = NULL;
4424                 view->goto_entry = NULL;
4425         }
4426
4427         ev_view_window_children_free (view);
4428
4429         if (view->selection_scroll_id) {
4430             g_source_remove (view->selection_scroll_id);
4431             view->selection_scroll_id = 0;
4432         }
4433
4434         if (view->selection_update_id) {
4435             g_source_remove (view->selection_update_id);
4436             view->selection_update_id = 0;
4437         }
4438
4439         if (view->loading_text) {
4440                 cairo_surface_destroy (view->loading_text);
4441                 view->loading_text = NULL;
4442         }
4443
4444         if (view->scroll_info.timeout_id) {
4445             g_source_remove (view->scroll_info.timeout_id);
4446             view->scroll_info.timeout_id = 0;
4447         }
4448
4449         if (view->drag_info.drag_timeout_id) {
4450                 g_source_remove (view->drag_info.drag_timeout_id);
4451                 view->drag_info.drag_timeout_id = 0;
4452         }
4453
4454         if (view->drag_info.release_timeout_id) {
4455                 g_source_remove (view->drag_info.release_timeout_id);
4456                 view->drag_info.release_timeout_id = 0;
4457         }
4458
4459         ev_view_presentation_transition_stop (view);
4460
4461         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4462
4463         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4464 }
4465
4466 static void
4467 ev_view_set_property (GObject      *object,
4468                       guint         prop_id,
4469                       const GValue *value,
4470                       GParamSpec   *pspec)
4471 {
4472         EvView *view = EV_VIEW (object);
4473
4474         switch (prop_id) {
4475                 case PROP_CONTINUOUS:
4476                         ev_view_set_continuous (view, g_value_get_boolean (value));
4477                         break;
4478                 case PROP_DUAL_PAGE:
4479                         ev_view_set_dual_page (view, g_value_get_boolean (value));
4480                         break;
4481                 case PROP_FULLSCREEN:
4482                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
4483                         break;
4484                 case PROP_PRESENTATION:
4485                         ev_view_set_presentation (view, g_value_get_boolean (value));
4486                         break;
4487                 case PROP_SIZING_MODE:
4488                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
4489                         break;
4490                 case PROP_ZOOM:
4491                         ev_view_set_zoom (view, g_value_get_double (value));
4492                         break;
4493                 case PROP_ROTATION:
4494                         ev_view_set_rotation (view, g_value_get_int (value));
4495                         break;
4496                 default:
4497                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4498         }
4499 }
4500
4501 static AtkObject *
4502 ev_view_get_accessible (GtkWidget *widget)
4503 {
4504         static gboolean first_time = TRUE;
4505
4506         if (first_time) {
4507                 AtkObjectFactory *factory;
4508                 AtkRegistry *registry;
4509                 GType derived_type;
4510                 GType derived_atk_type;
4511
4512                 /*
4513                  * Figure out whether accessibility is enabled by looking at the
4514                  * type of the accessible object which would be created for
4515                  * the parent type of EvView.
4516                  */
4517                 derived_type = g_type_parent (EV_TYPE_VIEW);
4518
4519                 registry = atk_get_default_registry ();
4520                 factory = atk_registry_get_factory (registry,
4521                                                     derived_type);
4522                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4523                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4524                         atk_registry_set_factory_type (registry,
4525                                                        EV_TYPE_VIEW,
4526                                                        ev_view_accessible_factory_get_type ());
4527                 first_time = FALSE;
4528         }
4529         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4530 }
4531
4532 static void
4533 ev_view_get_property (GObject *object,
4534                       guint prop_id,
4535                       GValue *value,
4536                       GParamSpec *pspec)
4537 {
4538         EvView *view = EV_VIEW (object);
4539
4540         switch (prop_id) {
4541                 case PROP_CONTINUOUS:
4542                         g_value_set_boolean (value, view->continuous);
4543                         break;
4544                 case PROP_DUAL_PAGE:
4545                         g_value_set_boolean (value, view->dual_page);
4546                         break;
4547                 case PROP_FULLSCREEN:
4548                         g_value_set_boolean (value, view->fullscreen);
4549                         break;
4550                 case PROP_PRESENTATION:
4551                         g_value_set_boolean (value, view->presentation);
4552                         break;
4553                 case PROP_SIZING_MODE:
4554                         g_value_set_enum (value, view->sizing_mode);
4555                         break;
4556                 case PROP_ZOOM:
4557                         g_value_set_double (value, view->scale);
4558                         break;
4559                 case PROP_ROTATION:
4560                         g_value_set_int (value, view->rotation);
4561                         break;
4562                 case PROP_HAS_SELECTION:
4563                         g_value_set_boolean (value,
4564                                              view->selection_info.selections != NULL);
4565                         break;
4566                 default:
4567                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4568         }
4569 }
4570
4571 static void
4572 ev_view_class_init (EvViewClass *class)
4573 {
4574         GObjectClass *object_class = G_OBJECT_CLASS (class);
4575         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4576         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4577         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4578         GtkBindingSet *binding_set;
4579
4580         object_class->finalize = ev_view_finalize;
4581         object_class->set_property = ev_view_set_property;
4582         object_class->get_property = ev_view_get_property;
4583
4584         widget_class->expose_event = ev_view_expose_event;
4585         widget_class->button_press_event = ev_view_button_press_event;
4586         widget_class->motion_notify_event = ev_view_motion_notify_event;
4587         widget_class->button_release_event = ev_view_button_release_event;
4588         widget_class->key_press_event = ev_view_key_press_event;
4589         widget_class->focus_in_event = ev_view_focus_in;
4590         widget_class->focus_out_event = ev_view_focus_out;
4591         widget_class->get_accessible = ev_view_get_accessible;
4592         widget_class->size_request = ev_view_size_request;
4593         widget_class->size_allocate = ev_view_size_allocate;
4594         widget_class->realize = ev_view_realize;
4595         widget_class->scroll_event = ev_view_scroll_event;
4596         widget_class->enter_notify_event = ev_view_enter_notify_event;
4597         widget_class->leave_notify_event = ev_view_leave_notify_event;
4598         widget_class->style_set = ev_view_style_set;
4599         widget_class->drag_data_get = ev_view_drag_data_get;
4600         widget_class->drag_motion = ev_view_drag_motion;
4601         widget_class->popup_menu = ev_view_popup_menu;
4602         widget_class->query_tooltip = ev_view_query_tooltip;
4603
4604         gtk_object_class->destroy = ev_view_destroy;
4605
4606         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4607
4608         class->binding_activated = ev_view_scroll;
4609
4610         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4611                          G_TYPE_FROM_CLASS (object_class),
4612                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4613                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4614                          NULL, NULL,
4615                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4616                          G_TYPE_NONE, 2,
4617                          GTK_TYPE_SCROLL_TYPE,
4618                          G_TYPE_BOOLEAN);
4619         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4620                          G_TYPE_FROM_CLASS (object_class),
4621                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4622                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4623                          NULL, NULL,
4624                          g_cclosure_marshal_VOID__OBJECT,
4625                          G_TYPE_NONE, 1,
4626                          G_TYPE_OBJECT);
4627         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4628                          G_TYPE_FROM_CLASS (object_class),
4629                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4630                          G_STRUCT_OFFSET (EvViewClass, external_link),
4631                          NULL, NULL,
4632                          g_cclosure_marshal_VOID__OBJECT,
4633                          G_TYPE_NONE, 1,
4634                          G_TYPE_OBJECT);
4635         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4636                          G_TYPE_FROM_CLASS (object_class),
4637                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4638                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4639                          NULL, NULL,
4640                          g_cclosure_marshal_VOID__OBJECT,
4641                          G_TYPE_NONE, 1,
4642                          G_TYPE_OBJECT);
4643
4644
4645         g_object_class_install_property (object_class,
4646                                          PROP_CONTINUOUS,
4647                                          g_param_spec_boolean ("continuous",
4648                                                                "Continuous",
4649                                                                "Continuous scrolling mode",
4650                                                                TRUE,
4651                                                                G_PARAM_READWRITE));
4652
4653         g_object_class_install_property (object_class,
4654                                          PROP_DUAL_PAGE,
4655                                          g_param_spec_boolean ("dual-page",
4656                                                                "Dual Page",
4657                                                                "Two pages visible at once",
4658                                                                FALSE,
4659                                                                G_PARAM_READWRITE));
4660         g_object_class_install_property (object_class,
4661                                          PROP_FULLSCREEN,
4662                                          g_param_spec_boolean ("fullscreen",
4663                                                                "Full Screen",
4664                                                                "Draw page in a fullscreen fashion",
4665                                                                FALSE,
4666                                                                G_PARAM_READWRITE));
4667         g_object_class_install_property (object_class,
4668                                          PROP_PRESENTATION,
4669                                          g_param_spec_boolean ("presentation",
4670                                                                "Presentation",
4671                                                                "Draw page in presentation mode",
4672                                                                TRUE,
4673                                                                G_PARAM_READWRITE));
4674
4675         g_object_class_install_property (object_class,
4676                                          PROP_SIZING_MODE,
4677                                          g_param_spec_enum ("sizing-mode",
4678                                                             "Sizing Mode",
4679                                                             "Sizing Mode",
4680                                                             EV_TYPE_SIZING_MODE,
4681                                                             EV_SIZING_FIT_WIDTH,
4682                                                             G_PARAM_READWRITE));
4683
4684         g_object_class_install_property (object_class,
4685                                          PROP_ZOOM,
4686                                          g_param_spec_double ("zoom",
4687                                                               "Zoom factor",
4688                                                               "Zoom factor",
4689                                                               0,
4690                                                               G_MAXDOUBLE,
4691                                                               1.0,
4692                                                               G_PARAM_READWRITE));
4693         g_object_class_install_property (object_class,
4694                                          PROP_ROTATION,
4695                                          g_param_spec_double ("rotation",
4696                                                               "Rotation",
4697                                                               "Rotation",
4698                                                               0,
4699                                                               360,
4700                                                               0,
4701                                                               G_PARAM_READWRITE));
4702
4703         g_object_class_install_property (object_class,
4704                                          PROP_HAS_SELECTION,
4705                                          g_param_spec_boolean ("has-selection",
4706                                                                "Has selection",
4707                                                                "The view has selections",
4708                                                                FALSE,
4709                                                                G_PARAM_READABLE));
4710
4711         binding_set = gtk_binding_set_by_class (class);
4712
4713         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4714         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4715         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4716         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4717         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4718         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4719         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4720         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4721         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4722                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4723         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4724                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4725         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4726                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4727         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4728                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4729
4730 }
4731
4732 static void
4733 ev_view_init (EvView *view)
4734 {
4735         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4736
4737         view->start_page = -1;
4738         view->end_page = -1;
4739         view->spacing = 5;
4740         view->scale = 1.0;
4741         view->current_page = 0;
4742         view->pressed_button = -1;
4743         view->cursor = EV_VIEW_CURSOR_NORMAL;
4744         view->drag_info.in_drag = FALSE;
4745         view->scroll_info.autoscrolling = FALSE;
4746         view->selection_info.selections = NULL;
4747         view->selection_info.in_selection = FALSE;
4748         view->selection_info.in_drag = FALSE;
4749         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4750         view->continuous = TRUE;
4751         view->dual_page = FALSE;
4752         view->presentation = FALSE;
4753         view->presentation_state = EV_PRESENTATION_NORMAL;
4754         view->fullscreen = FALSE;
4755         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4756         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4757         view->jump_to_find_result = TRUE;
4758         view->highlight_find_results = FALSE;
4759
4760         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4761         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4762 }
4763
4764 /*** Callbacks ***/
4765
4766 static void
4767 ev_view_change_page (EvView *view,
4768                      gint    new_page,
4769                      gboolean start_transition)
4770 {
4771         gint x, y;
4772
4773         view->current_page = new_page;
4774         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4775
4776         if (view->presentation && start_transition)
4777                 ev_view_presentation_transition_start (view);
4778
4779         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4780         ev_view_handle_cursor_over_xy (view, x, y);
4781
4782         gtk_widget_queue_resize (GTK_WIDGET (view));
4783 }
4784
4785 static void
4786 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4787                                      EvView                *view)
4788 {
4789         g_object_unref (view->animation);
4790         view->animation = NULL;
4791         ev_view_change_page (view, view->current_page, TRUE);
4792 }
4793
4794 /**
4795  * ev_view_transition_animation_cancel:
4796  * @animation: Animation to finish
4797  * @view: An EvView
4798  *
4799  * Does almost the same as cancel, but without scheduling the transition.
4800  */
4801
4802 static void
4803 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4804                                      EvView                *view)
4805 {
4806         g_object_unref (view->animation);
4807         view->animation = NULL;
4808         ev_view_change_page (view, view->current_page, FALSE);
4809 }
4810
4811 static void
4812 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4813                                     gdouble                progress,
4814                                     EvView                *view)
4815 {
4816         gtk_widget_queue_draw (GTK_WIDGET (view));
4817 }
4818
4819 static void
4820 ev_view_presentation_animation_start (EvView *view,
4821                                       int     new_page)
4822 {
4823         EvTransitionEffect *effect = NULL;
4824         cairo_surface_t *surface;
4825
4826         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4827                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4828                                                             view->current_page);
4829         if (!effect)
4830                 return;
4831
4832         view->animation = ev_transition_animation_new (effect);
4833
4834         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4835         ev_transition_animation_set_origin_surface (view->animation, surface);
4836         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, new_page);
4837         if (surface)
4838                 ev_transition_animation_set_dest_surface (view->animation, surface);
4839
4840         g_signal_connect (view->animation, "frame",
4841                           G_CALLBACK (ev_view_transition_animation_frame), view);
4842         g_signal_connect (view->animation, "finished",
4843                           G_CALLBACK (ev_view_transition_animation_finish), view);
4844 }
4845
4846 static void
4847 job_finished_cb (EvPixbufCache *pixbuf_cache,
4848                  GdkRegion     *region,
4849                  EvView        *view)
4850 {
4851         if (view->animation) {
4852                 cairo_surface_t *surface;
4853
4854                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4855                 ev_transition_animation_set_dest_surface (view->animation, surface);
4856         }
4857
4858         if (region) {
4859                 gdk_window_invalidate_region (view->layout.bin_window,
4860                                               region, TRUE);
4861         } else {
4862                 gtk_widget_queue_draw (GTK_WIDGET (view));
4863         }
4864 }
4865
4866 static void
4867 ev_view_page_changed_cb (EvDocumentModel *model,
4868                          gint             old_page,
4869                          gint             new_page,
4870                          EvView          *view)
4871 {
4872         if (!view->document)
4873                 return;
4874
4875         if (view->current_page != new_page) {
4876                 if (view->presentation)
4877                         ev_view_presentation_animation_start (view, new_page);
4878
4879                 ev_view_change_page (view, new_page, TRUE);
4880         } else {
4881                 gtk_widget_queue_draw (GTK_WIDGET (view));
4882         }
4883
4884         view->find_result = 0;
4885 }
4886
4887 static void
4888 on_adjustment_value_changed (GtkAdjustment *adjustment,
4889                              EvView        *view)
4890 {
4891         int dx = 0, dy = 0;
4892         gint x, y;
4893         GList *children, *l;
4894
4895         if (! GTK_WIDGET_REALIZED (view))
4896                 return;
4897
4898         if (view->hadjustment) {
4899                 dx = view->scroll_x - (int) view->hadjustment->value;
4900                 view->scroll_x = (int) view->hadjustment->value;
4901         } else {
4902                 view->scroll_x = 0;
4903         }
4904
4905         if (view->vadjustment) {
4906                 dy = view->scroll_y - (int) view->vadjustment->value;
4907                 view->scroll_y = (int) view->vadjustment->value;
4908         } else {
4909                 view->scroll_y = 0;
4910         }
4911
4912         children = gtk_container_get_children (GTK_CONTAINER (view));
4913         for (l = children; l && l->data; l = g_list_next (l)) {
4914                 gint       child_x, child_y;
4915                 GtkWidget *child = (GtkWidget *)l->data;
4916
4917                 gtk_container_child_get (GTK_CONTAINER (view),
4918                                          child,
4919                                          "x", &child_x,
4920                                          "y", &child_y,
4921                                          NULL);
4922                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4923         }
4924         g_list_free (children);
4925
4926         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4927                 EvViewWindowChild *child;
4928
4929                 child = (EvViewWindowChild *)l->data;
4930
4931                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4932         }
4933
4934         if (view->pending_resize)
4935                 gtk_widget_queue_draw (GTK_WIDGET (view));
4936         else
4937                 gdk_window_scroll (view->layout.bin_window, dx, dy);
4938
4939         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4940         ev_view_handle_cursor_over_xy (view, x, y);
4941
4942         if (view->document)
4943                 view_update_range_and_current_page (view);
4944 }
4945
4946 GtkWidget*
4947 ev_view_new (void)
4948 {
4949         GtkWidget *view;
4950
4951         view = g_object_new (EV_TYPE_VIEW, NULL);
4952
4953         return view;
4954 }
4955
4956 static void
4957 setup_caches (EvView *view)
4958 {
4959         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
4960         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
4961         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4962 }
4963
4964 static void
4965 clear_caches (EvView *view)
4966 {
4967         if (view->pixbuf_cache) {
4968                 g_object_unref (view->pixbuf_cache);
4969                 view->pixbuf_cache = NULL;
4970         }
4971 }
4972
4973 void
4974 ev_view_set_loading (EvView       *view,
4975                      gboolean      loading)
4976 {
4977         view->loading = loading;
4978         gtk_widget_queue_draw (GTK_WIDGET (view));
4979 }
4980
4981 static gboolean
4982 ev_view_autoscroll_cb (EvView *view)
4983 {
4984         gdouble speed, value;
4985
4986         /* If the user stops autoscrolling, autoscrolling will be
4987          * set to false but the timeout will continue; stop the timeout: */
4988         if (!view->scroll_info.autoscrolling) {
4989                 view->scroll_info.timeout_id = 0;
4990                 return FALSE;
4991         }
4992
4993         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4994                 (view->scroll_info.last_y < view->scroll_info.start_y))
4995                 return TRUE;
4996
4997         /* Replace 100 with your speed of choice: The lower the faster.
4998          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4999          *      based on the distance of the starting point from the mouse
5000          * (All also effected by the timeout interval of this callback) */
5001
5002         if (view->scroll_info.start_y > view->scroll_info.last_y)
5003                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
5004         else
5005                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
5006
5007         value = gtk_adjustment_get_value (view->vadjustment);
5008         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
5009         gtk_adjustment_set_value (view->vadjustment, value);
5010
5011         return TRUE;
5012
5013 }
5014
5015 void
5016 ev_view_autoscroll_start (EvView *view)
5017 {
5018         gint x, y;
5019
5020         g_return_if_fail (EV_IS_VIEW (view));
5021
5022         if (view->scroll_info.autoscrolling)
5023                 return;
5024
5025         view->scroll_info.autoscrolling = TRUE;
5026         view->scroll_info.timeout_id =
5027                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5028                                view);
5029
5030         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5031         ev_view_handle_cursor_over_xy (view, x, y);
5032 }
5033
5034 void
5035 ev_view_autoscroll_stop (EvView *view)
5036 {
5037         gint x, y;
5038
5039         g_return_if_fail (EV_IS_VIEW (view));
5040
5041         if (!view->scroll_info.autoscrolling)
5042                 return;
5043
5044         view->scroll_info.autoscrolling = FALSE;
5045         if (view->scroll_info.timeout_id) {
5046                 g_source_remove (view->scroll_info.timeout_id);
5047                 view->scroll_info.timeout_id = 0;
5048         }
5049
5050         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5051         ev_view_handle_cursor_over_xy (view, x, y);
5052 }
5053
5054 static void
5055 ev_view_document_changed_cb (EvDocumentModel *model,
5056                              GParamSpec      *pspec,
5057                              EvView          *view)
5058 {
5059         EvDocument *document = ev_document_model_get_document (model);
5060
5061         view->loading = FALSE;
5062
5063         if (document != view->document) {
5064                 clear_caches (view);
5065
5066                 if (view->document) {
5067                         g_object_unref (view->document);
5068                 }
5069
5070                 view->document = document;
5071                 view->find_result = 0;
5072
5073                 if (view->document) {
5074                         g_object_ref (view->document);
5075                         setup_caches (view);
5076                 }
5077
5078                 ev_view_change_page (view,
5079                                      ev_document_model_get_page (model),
5080                                      TRUE);
5081         }
5082 }
5083
5084 static void
5085 ev_view_rotation_changed_cb (EvDocumentModel *model,
5086                              GParamSpec      *pspec,
5087                              EvView          *view)
5088 {
5089         gint rotation = ev_document_model_get_rotation (model);
5090
5091         ev_view_set_rotation (view, rotation);
5092
5093         if (view->pixbuf_cache) {
5094                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5095                 gtk_widget_queue_resize (GTK_WIDGET (view));
5096         }
5097
5098         if (rotation != 0)
5099                 clear_selection (view);
5100 }
5101
5102 static void
5103 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
5104                                 GParamSpec      *pspec,
5105                                 EvView          *view)
5106 {
5107         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
5108
5109         ev_view_set_sizing_mode (view, mode);
5110
5111         if (mode != EV_SIZING_FREE)
5112                 gtk_widget_queue_resize (GTK_WIDGET (view));
5113 }
5114
5115 #define EPSILON 0.0000001
5116 static void
5117 ev_view_scale_changed_cb (EvDocumentModel *model,
5118                           GParamSpec      *pspec,
5119                           EvView          *view)
5120 {
5121         gdouble scale = ev_document_model_get_scale (model);
5122
5123         if (ABS (view->scale - scale) < EPSILON)
5124                 return;
5125
5126         if (view->loading_text) {
5127                 cairo_surface_destroy (view->loading_text);
5128                 view->loading_text = NULL;
5129         }
5130
5131         ev_view_set_zoom (view, scale);
5132
5133         view->pending_resize = TRUE;
5134         gtk_widget_queue_resize (GTK_WIDGET (view));
5135 }
5136
5137 void
5138 ev_view_set_model (EvView          *view,
5139                    EvDocumentModel *model)
5140 {
5141         g_return_if_fail (EV_IS_VIEW (view));
5142         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
5143
5144         if (model == view->model)
5145                 return;
5146
5147         if (view->model) {
5148                 g_signal_handlers_disconnect_by_func (view->model,
5149                                                       ev_view_document_changed_cb,
5150                                                       view);
5151                 g_signal_handlers_disconnect_by_func (view->model,
5152                                                       ev_view_page_changed_cb,
5153                                                       view);
5154                 g_object_unref (view->model);
5155         }
5156         view->model = g_object_ref (model);
5157         g_signal_connect (view->model, "notify::document",
5158                           G_CALLBACK (ev_view_document_changed_cb),
5159                           view);
5160         g_signal_connect (view->model, "notify::rotation",
5161                           G_CALLBACK (ev_view_rotation_changed_cb),
5162                           view);
5163         g_signal_connect (view->model, "notify::sizing-mode",
5164                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
5165                           view);
5166         g_signal_connect (view->model, "notify::scale",
5167                           G_CALLBACK (ev_view_scale_changed_cb),
5168                           view);
5169         g_signal_connect (view->model, "page-changed",
5170                           G_CALLBACK (ev_view_page_changed_cb),
5171                           view);
5172 }
5173
5174 static void
5175 ev_view_reload_page (EvView    *view,
5176                      gint       page,
5177                      GdkRegion *region)
5178 {
5179         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5180                                      region,
5181                                      page,
5182                                      view->rotation,
5183                                      view->scale);
5184 }
5185
5186 void
5187 ev_view_reload (EvView *view)
5188 {
5189         ev_pixbuf_cache_clear (view->pixbuf_cache);
5190         view_update_range_and_current_page (view);
5191 }
5192
5193 /*** Zoom and sizing mode ***/
5194
5195 void
5196 ev_view_set_zoom (EvView   *view,
5197                   double    scale)
5198 {
5199         view->scale = scale;
5200
5201         g_object_notify (G_OBJECT (view), "zoom");
5202 }
5203
5204 double
5205 ev_view_get_zoom (EvView *view)
5206 {
5207         return view->scale;
5208 }
5209
5210 void
5211 ev_view_set_screen_dpi (EvView  *view,
5212                         gdouble  dpi)
5213 {
5214         g_return_if_fail (EV_IS_VIEW (view));
5215         g_return_if_fail (dpi > 0);
5216
5217         view->dpi = dpi;
5218 }
5219
5220 gboolean
5221 ev_view_get_continuous (EvView *view)
5222 {
5223         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5224
5225         return view->continuous;
5226 }
5227
5228 void
5229 ev_view_set_continuous (EvView   *view,
5230                         gboolean  continuous)
5231 {
5232         g_return_if_fail (EV_IS_VIEW (view));
5233
5234         continuous = continuous != FALSE;
5235
5236         if (view->continuous != continuous) {
5237                 view->continuous = continuous;
5238                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5239                 gtk_widget_queue_resize (GTK_WIDGET (view));
5240         }
5241
5242         g_object_notify (G_OBJECT (view), "continuous");
5243 }
5244
5245 gboolean
5246 ev_view_get_dual_page (EvView *view)
5247 {
5248         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5249
5250         return view->dual_page;
5251 }
5252
5253 void
5254 ev_view_set_dual_page (EvView   *view,
5255                        gboolean  dual_page)
5256 {
5257         g_return_if_fail (EV_IS_VIEW (view));
5258
5259         dual_page = dual_page != FALSE;
5260
5261         if (view->dual_page == dual_page)
5262                 return;
5263
5264         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5265         view->dual_page = dual_page;
5266         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5267          * preload_cache_size to be 2 if dual_page is set.
5268          */
5269         gtk_widget_queue_resize (GTK_WIDGET (view));
5270
5271         g_object_notify (G_OBJECT (view), "dual-page");
5272 }
5273
5274 void
5275 ev_view_set_fullscreen (EvView   *view,
5276                          gboolean  fullscreen)
5277 {
5278         g_return_if_fail (EV_IS_VIEW (view));
5279
5280         fullscreen = fullscreen != FALSE;
5281
5282         if (view->fullscreen == fullscreen)
5283                 return;
5284
5285         view->fullscreen = fullscreen;
5286         gtk_widget_queue_resize (GTK_WIDGET (view));
5287
5288         g_object_notify (G_OBJECT (view), "fullscreen");
5289 }
5290
5291 gboolean
5292 ev_view_get_fullscreen (EvView *view)
5293 {
5294         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5295
5296         return view->fullscreen;
5297 }
5298
5299 void
5300 ev_view_set_presentation (EvView   *view,
5301                           gboolean  presentation)
5302 {
5303         g_return_if_fail (EV_IS_VIEW (view));
5304
5305         presentation = presentation != FALSE;
5306
5307         if (view->presentation == presentation)
5308                 return;
5309
5310         if (!presentation)
5311                 view->presentation_state = EV_PRESENTATION_NORMAL;
5312
5313         view->presentation = presentation;
5314         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5315
5316         if (presentation) {
5317                 view->sizing_mode_saved = view->sizing_mode;
5318                 view->scale_saved = view->scale;
5319                 ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
5320         } else {
5321                 ev_document_model_set_sizing_mode (view->model, view->sizing_mode_saved);
5322                 ev_document_model_set_scale (view->model, view->scale_saved);
5323         }
5324
5325         gtk_widget_queue_resize (GTK_WIDGET (view));
5326
5327         if (presentation)
5328                 ev_view_presentation_transition_start (view);
5329         else {
5330                 ev_view_presentation_transition_stop (view);
5331
5332                 if (view->animation) {
5333                         /* stop any running animation */
5334                         ev_view_transition_animation_cancel (view->animation, view);
5335                 }
5336         }
5337
5338         if (GTK_WIDGET_REALIZED (view)) {
5339                 if (view->presentation)
5340                         gdk_window_set_background (view->layout.bin_window,
5341                                                    &GTK_WIDGET (view)->style->black);
5342                 else
5343                         gdk_window_set_background (view->layout.bin_window,
5344                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
5345         }
5346
5347         g_object_notify (G_OBJECT (view), "presentation");
5348 }
5349
5350 gboolean
5351 ev_view_get_presentation (EvView *view)
5352 {
5353         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5354
5355         return view->presentation;
5356 }
5357
5358 static gboolean
5359 transition_next_page (EvView *view)
5360 {
5361         ev_view_next_page (view);
5362
5363         return FALSE;
5364 }
5365
5366 static void
5367 ev_view_presentation_transition_stop (EvView *view)
5368 {
5369         if (view->trans_timeout_id > 0)
5370                 g_source_remove (view->trans_timeout_id);
5371         view->trans_timeout_id = 0;
5372 }
5373
5374 static void
5375 ev_view_presentation_transition_start (EvView *view)
5376 {
5377         gdouble duration;
5378
5379         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
5380                 return;
5381
5382         ev_view_presentation_transition_stop (view);
5383
5384         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
5385                                                              view->current_page);
5386         if (duration > 0) {
5387                 view->trans_timeout_id =
5388                         g_timeout_add_seconds (duration,
5389                                                (GSourceFunc) transition_next_page,
5390                                                view);
5391         }
5392 }
5393
5394 void
5395 ev_view_set_sizing_mode (EvView       *view,
5396                          EvSizingMode  sizing_mode)
5397 {
5398         view->sizing_mode = sizing_mode;
5399
5400         g_object_notify (G_OBJECT (view), "sizing-mode");
5401 }
5402
5403 EvSizingMode
5404 ev_view_get_sizing_mode (EvView *view)
5405 {
5406         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
5407
5408         return view->sizing_mode;
5409 }
5410
5411 gboolean
5412 ev_view_can_zoom_in (EvView *view)
5413 {
5414         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
5415 }
5416
5417 gboolean
5418 ev_view_can_zoom_out (EvView *view)
5419 {
5420         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
5421 }
5422
5423 void
5424 ev_view_zoom_in (EvView *view)
5425 {
5426         gdouble scale;
5427
5428         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5429
5430         if (view->presentation)
5431                 return;
5432
5433         view->pending_scroll = SCROLL_TO_CENTER;
5434         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
5435         ev_document_model_set_scale (view->model, scale);
5436 }
5437
5438 void
5439 ev_view_zoom_out (EvView *view)
5440 {
5441         gdouble scale;
5442
5443         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5444
5445         if (view->presentation)
5446                 return;
5447
5448         view->pending_scroll = SCROLL_TO_CENTER;
5449         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5450         ev_document_model_set_scale (view->model, scale);
5451 }
5452
5453 void
5454 ev_view_set_rotation (EvView *view, int rotation)
5455 {
5456         view->rotation = rotation;
5457
5458         g_object_notify (G_OBJECT (view), "rotation");
5459 }
5460
5461 int
5462 ev_view_get_rotation (EvView *view)
5463 {
5464         return view->rotation;
5465 }
5466
5467 static double
5468 zoom_for_size_fit_width (gdouble doc_width,
5469                          gdouble doc_height,
5470                          int     target_width,
5471                          int     target_height)
5472 {
5473         double scale;
5474
5475         scale = (double)target_width / doc_width;
5476
5477         if (doc_height * scale > target_height)
5478                 scale = (double)target_width / doc_width;
5479
5480         return scale;
5481 }
5482
5483 static double
5484 zoom_for_size_fit_height (gdouble doc_width,
5485                           gdouble doc_height,
5486                           int     target_width,
5487                           int     target_height)
5488 {
5489         double scale;
5490
5491         scale = (double)target_height / doc_height;
5492
5493         if (doc_width * scale > target_width)
5494                 scale = (double)target_height / doc_height;
5495
5496         return scale;
5497 }
5498
5499 static double
5500 zoom_for_size_best_fit (gdouble doc_width,
5501                         gdouble doc_height,
5502                         int     target_width,
5503                         int     target_height)
5504 {
5505         double w_scale;
5506         double h_scale;
5507
5508         w_scale = (double)target_width / doc_width;
5509         h_scale = (double)target_height / doc_height;
5510
5511         if (doc_height * w_scale > target_height)
5512                 w_scale = (double)target_width / doc_width;
5513         if (doc_width * h_scale > target_width)
5514                 h_scale = (double)target_height / doc_height;
5515
5516         return MIN (w_scale, h_scale);
5517 }
5518
5519
5520 static void
5521 ev_view_zoom_for_size_presentation (EvView *view,
5522                                     int     width,
5523                                     int     height)
5524 {
5525         gdouble doc_width, doc_height;
5526         gdouble scale;
5527
5528         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5529         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5530         ev_document_model_set_scale (view->model, scale);
5531 }
5532
5533 static void
5534 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5535                                                 int     width,
5536                                                 int     height)
5537 {
5538         gdouble doc_width, doc_height;
5539         GtkBorder border;
5540         gdouble scale;
5541
5542         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5543         if (view->rotation == 90 || view->rotation == 270) {
5544                 gdouble tmp;
5545
5546                 tmp = doc_width;
5547                 doc_width = doc_height;
5548                 doc_height = tmp;
5549         }
5550
5551         compute_border (view, doc_width, doc_height, &border);
5552
5553         doc_width *= 2;
5554         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5555         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5556
5557         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5558                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height);
5559         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5560                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5561         else
5562                 g_assert_not_reached ();
5563
5564         ev_document_model_set_scale (view->model, scale);
5565 }
5566
5567 static void
5568 ev_view_zoom_for_size_continuous (EvView *view,
5569                                   int     width,
5570                                   int     height)
5571 {
5572         gdouble doc_width, doc_height;
5573         GtkBorder border;
5574         gdouble scale;
5575
5576         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5577         if (view->rotation == 90 || view->rotation == 270) {
5578                 gdouble tmp;
5579
5580                 tmp = doc_width;
5581                 doc_width = doc_height;
5582                 doc_height = tmp;
5583         }
5584
5585         compute_border (view, doc_width, doc_height, &border);
5586
5587         width -= (border.left + border.right + 2 * view->spacing);
5588         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5589
5590         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5591                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height);
5592         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5593                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5594         else
5595                 g_assert_not_reached ();
5596
5597         ev_document_model_set_scale (view->model, scale);
5598 }
5599
5600 static void
5601 ev_view_zoom_for_size_dual_page (EvView *view,
5602                                  int     width,
5603                                  int     height)
5604 {
5605         GtkBorder border;
5606         gdouble doc_width, doc_height;
5607         gdouble scale;
5608         gint other_page;
5609
5610         other_page = view->current_page ^ 1;
5611
5612         /* Find the largest of the two. */
5613         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5614         if (other_page < ev_document_get_n_pages (view->document)) {
5615                 gdouble width_2, height_2;
5616
5617                 get_doc_page_size (view, other_page, &width_2, &height_2);
5618                 if (width_2 > doc_width)
5619                         doc_width = width_2;
5620                 if (height_2 > doc_height)
5621                         doc_height = height_2;
5622         }
5623         compute_border (view, width, height, &border);
5624
5625         doc_width = doc_width * 2;
5626         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5627         height -= (border.top + border.bottom + 2 * view->spacing);
5628
5629         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5630                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height);
5631         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5632                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5633         else
5634                 g_assert_not_reached ();
5635
5636         ev_document_model_set_scale (view->model, scale);
5637 }
5638
5639 static void
5640 ev_view_zoom_for_size_single_page (EvView *view,
5641                                    int     width,
5642                                    int     height)
5643 {
5644         gdouble doc_width, doc_height;
5645         GtkBorder border;
5646         gdouble scale;
5647
5648         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5649
5650         /* Get an approximate border */
5651         compute_border (view, width, height, &border);
5652
5653         width -= (border.left + border.right + 2 * view->spacing);
5654         height -= (border.top + border.bottom + 2 * view->spacing);
5655
5656         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5657                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height);
5658         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5659                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5660         else
5661                 g_assert_not_reached ();
5662
5663         ev_document_model_set_scale (view->model, scale);
5664 }
5665
5666 static void
5667 ev_view_zoom_for_size (EvView *view,
5668                        int     width,
5669                        int     height)
5670 {
5671         g_return_if_fail (EV_IS_VIEW (view));
5672         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5673                           view->sizing_mode == EV_SIZING_BEST_FIT);
5674         g_return_if_fail (width >= 0);
5675         g_return_if_fail (height >= 0);
5676
5677         if (view->document == NULL)
5678                 return;
5679
5680         if (view->presentation)
5681                 ev_view_zoom_for_size_presentation (view, width, height);
5682         else if (view->continuous && view->dual_page)
5683                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5684         else if (view->continuous)
5685                 ev_view_zoom_for_size_continuous (view, width, height);
5686         else if (view->dual_page)
5687                 ev_view_zoom_for_size_dual_page (view, width, height);
5688         else
5689                 ev_view_zoom_for_size_single_page (view, width, height);
5690 }
5691
5692 /*** Find ***/
5693 static gint
5694 ev_view_find_get_n_results (EvView *view, gint page)
5695 {
5696         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5697 }
5698
5699 static EvRectangle *
5700 ev_view_find_get_result (EvView *view, gint page, gint result)
5701 {
5702         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5703 }
5704
5705 static void
5706 jump_to_find_result (EvView *view)
5707 {
5708         gint n_results;
5709         gint page = view->current_page;
5710
5711         n_results = ev_view_find_get_n_results (view, page);
5712
5713         if (n_results > 0 && view->find_result < n_results) {
5714                 EvRectangle *rect;
5715                 GdkRectangle view_rect;
5716
5717                 rect = ev_view_find_get_result (view, page, view->find_result);
5718                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5719                 ensure_rectangle_is_visible (view, &view_rect);
5720                 view->jump_to_find_result = FALSE;
5721         }
5722 }
5723
5724 /**
5725  * jump_to_find_page
5726  * @view: #EvView instance
5727  * @direction: Direction to look
5728  * @shift: Shift from current page
5729  *
5730  * Jumps to the first page that has occurences of searched word.
5731  * Uses a direction where to look and a shift from current page.
5732  *
5733  */
5734 static void
5735 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5736 {
5737         int n_pages, i;
5738
5739         n_pages = ev_document_get_n_pages (view->document);
5740
5741         for (i = 0; i < n_pages; i++) {
5742                 int page;
5743
5744                 if (direction == EV_VIEW_FIND_NEXT)
5745                         page = view->current_page + i;
5746                 else
5747                         page = view->current_page - i;
5748                 page += shift;
5749
5750                 if (page >= n_pages) {
5751                         page = page - n_pages;
5752                 } else if (page < 0)
5753                         page = page + n_pages;
5754
5755                 if (ev_view_find_get_n_results (view, page) > 0) {
5756                         ev_document_model_set_page (view->model, page);
5757                         break;
5758                 }
5759         }
5760 }
5761
5762 void
5763 ev_view_find_changed (EvView *view, GList **results, gint page)
5764 {
5765         view->find_pages = results;
5766
5767         if (view->jump_to_find_result == TRUE) {
5768                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5769                 jump_to_find_result (view);
5770         }
5771
5772         if (view->current_page == page)
5773                 gtk_widget_queue_draw (GTK_WIDGET (view));
5774 }
5775
5776 void
5777 ev_view_find_next (EvView *view)
5778 {
5779         gint n_results;
5780
5781         n_results = ev_view_find_get_n_results (view, view->current_page);
5782         view->find_result++;
5783
5784         if (view->find_result >= n_results) {
5785                 view->find_result = 0;
5786                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5787                 jump_to_find_result (view);
5788         } else {
5789                 jump_to_find_result (view);
5790                 gtk_widget_queue_draw (GTK_WIDGET (view));
5791         }
5792 }
5793
5794 void
5795 ev_view_find_previous (EvView *view)
5796 {
5797         view->find_result--;
5798
5799         if (view->find_result < 0) {
5800                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5801                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5802                 jump_to_find_result (view);
5803         } else {
5804                 jump_to_find_result (view);
5805                 gtk_widget_queue_draw (GTK_WIDGET (view));
5806         }
5807 }
5808
5809 void
5810 ev_view_find_search_changed (EvView *view)
5811 {
5812         /* search string has changed, focus on new search result */
5813         view->jump_to_find_result = TRUE;
5814         view->find_pages = NULL;
5815 }
5816
5817 void
5818 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5819 {
5820         view->highlight_find_results = value;
5821         gtk_widget_queue_draw (GTK_WIDGET (view));
5822 }
5823
5824 void
5825 ev_view_find_cancel (EvView *view)
5826 {
5827         view->find_pages = NULL;
5828 }
5829
5830 /*** Selections ***/
5831
5832 /* compute_new_selection_rect/text calculates the area currently selected by
5833  * view_rect.  each handles a different mode;
5834  */
5835 static GList *
5836 compute_new_selection_rect (EvView       *view,
5837                             GdkPoint     *start,
5838                             GdkPoint     *stop)
5839 {
5840         GdkRectangle view_rect;
5841         int n_pages, i;
5842         GList *list = NULL;
5843
5844         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5845
5846         view_rect.x = MIN (start->x, stop->x);
5847         view_rect.y = MIN (start->y, stop->y);
5848         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5849         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5850
5851         n_pages = ev_document_get_n_pages (view->document);
5852
5853         for (i = 0; i < n_pages; i++) {
5854                 GdkRectangle page_area;
5855                 GtkBorder border;
5856
5857                 if (get_page_extents (view, i, &page_area, &border)) {
5858                         GdkRectangle overlap;
5859
5860                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5861                                 EvViewSelection *selection;
5862
5863                                 selection = g_new0 (EvViewSelection, 1);
5864                                 selection->page = i;
5865                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5866                                                        &(selection->rect));
5867
5868                                 list = g_list_append (list, selection);
5869                         }
5870                 }
5871         }
5872
5873         return list;
5874 }
5875
5876 static gboolean
5877 gdk_rectangle_point_in (GdkRectangle *rectangle,
5878                         GdkPoint     *point)
5879 {
5880         return rectangle->x <= point->x &&
5881                 rectangle->y <= point->y &&
5882                 point->x < rectangle->x + rectangle->width &&
5883                 point->y < rectangle->y + rectangle->height;
5884 }
5885
5886 static GList *
5887 compute_new_selection_text (EvView          *view,
5888                             EvSelectionStyle style,
5889                             GdkPoint        *start,
5890                             GdkPoint        *stop)
5891 {
5892         int n_pages, i, first, last;
5893         GList *list = NULL;
5894         EvViewSelection *selection;
5895         gdouble width, height;
5896         int start_page, end_page;
5897
5898         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5899
5900         n_pages = ev_document_get_n_pages (view->document);
5901
5902         /* First figure out the range of pages the selection
5903          * affects. */
5904         first = n_pages;
5905         last = 0;
5906         if (view->continuous) {
5907                 start_page = 0;
5908                 end_page = n_pages;
5909         } else if (view->dual_page) {
5910                 start_page = view->start_page;
5911                 end_page = view->end_page + 1;
5912         } else {
5913                 start_page = view->current_page;
5914                 end_page = view->current_page + 1;
5915         }
5916
5917         for (i = start_page; i < end_page; i++) {
5918                 GdkRectangle page_area;
5919                 GtkBorder border;
5920
5921                 get_page_extents (view, i, &page_area, &border);
5922                 if (gdk_rectangle_point_in (&page_area, start) ||
5923                     gdk_rectangle_point_in (&page_area, stop)) {
5924                         if (first == n_pages)
5925                                 first = i;
5926                         last = i;
5927                 }
5928
5929         }
5930
5931         /* Now create a list of EvViewSelection's for the affected
5932          * pages.  This could be an empty list, a list of just one
5933          * page or a number of pages.*/
5934         for (i = first; i < last + 1; i++) {
5935                 GdkRectangle page_area;
5936                 GtkBorder border;
5937                 GdkPoint *point;
5938
5939                 get_doc_page_size (view, i, &width, &height);
5940
5941                 selection = g_new0 (EvViewSelection, 1);
5942                 selection->page = i;
5943                 selection->style = style;
5944                 selection->rect.x1 = selection->rect.y1 = 0;
5945                 selection->rect.x2 = width;
5946                 selection->rect.y2 = height;
5947
5948                 get_page_extents (view, i, &page_area, &border);
5949
5950                 if (gdk_rectangle_point_in (&page_area, start))
5951                         point = start;
5952                 else
5953                         point = stop;
5954
5955                 if (i == first)
5956                         view_point_to_doc_point (view, point, &page_area,
5957                                                  &selection->rect.x1,
5958                                                  &selection->rect.y1);
5959
5960                 /* If the selection is contained within just one page,
5961                  * make sure we don't write 'start' into both points
5962                  * in selection->rect. */
5963                 if (first == last)
5964                         point = stop;
5965
5966                 if (i == last)
5967                         view_point_to_doc_point (view, point, &page_area,
5968                                                  &selection->rect.x2,
5969                                                  &selection->rect.y2);
5970
5971                 list = g_list_append (list, selection);
5972         }
5973
5974         return list;
5975 }
5976
5977 /* This function takes the newly calculated list, and figures out which regions
5978  * have changed.  It then queues a redraw approporiately.
5979  */
5980 static void
5981 merge_selection_region (EvView *view,
5982                         GList  *new_list)
5983 {
5984         GList *old_list;
5985         GList *new_list_ptr, *old_list_ptr;
5986
5987         /* Update the selection */
5988         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5989         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5990         g_list_free (view->selection_info.selections);
5991         view->selection_info.selections = new_list;
5992         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5993         g_object_notify (G_OBJECT (view), "has-selection");
5994
5995         new_list_ptr = new_list;
5996         old_list_ptr = old_list;
5997
5998         while (new_list_ptr || old_list_ptr) {
5999                 EvViewSelection *old_sel, *new_sel;
6000                 int cur_page;
6001                 GdkRegion *region = NULL;
6002
6003                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
6004                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
6005
6006                 /* Assume that the lists are in order, and we run through them
6007                  * comparing them, one page at a time.  We come out with the
6008                  * first page we see. */
6009                 if (new_sel && old_sel) {
6010                         if (new_sel->page < old_sel->page) {
6011                                 new_list_ptr = new_list_ptr->next;
6012                                 old_sel = NULL;
6013                         } else if (new_sel->page > old_sel->page) {
6014                                 old_list_ptr = old_list_ptr->next;
6015                                 new_sel = NULL;
6016                         } else {
6017                                 new_list_ptr = new_list_ptr->next;
6018                                 old_list_ptr = old_list_ptr->next;
6019                         }
6020                 } else if (new_sel) {
6021                         new_list_ptr = new_list_ptr->next;
6022                 } else if (old_sel) {
6023                         old_list_ptr = old_list_ptr->next;
6024                 }
6025
6026                 g_assert (new_sel || old_sel);
6027
6028                 /* is the page we're looking at on the screen?*/
6029                 cur_page = new_sel ? new_sel->page : old_sel->page;
6030                 if (cur_page < view->start_page || cur_page > view->end_page)
6031                         continue;
6032
6033                 /* seed the cache with a new page.  We are going to need the new
6034                  * region too. */
6035                 if (new_sel) {
6036                         GdkRegion *tmp_region = NULL;
6037
6038                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
6039                                                                cur_page,
6040                                                                view->scale,
6041                                                                &tmp_region);
6042
6043                         if (tmp_region) {
6044                                 new_sel->covered_region = gdk_region_copy (tmp_region);
6045                         }
6046                 }
6047
6048                 /* Now we figure out what needs redrawing */
6049                 if (old_sel && new_sel) {
6050                         if (old_sel->covered_region && new_sel->covered_region) {
6051                                 /* We only want to redraw the areas that have
6052                                  * changed, so we xor the old and new regions
6053                                  * and redraw if it's different */
6054                                 region = gdk_region_copy (old_sel->covered_region);
6055                                 gdk_region_xor (region, new_sel->covered_region);
6056                                 if (gdk_region_empty (region)) {
6057                                         gdk_region_destroy (region);
6058                                         region = NULL;
6059                                 }
6060                         } else if (old_sel->covered_region) {
6061                                 region = gdk_region_copy (old_sel->covered_region);
6062                         } else if (new_sel->covered_region) {
6063                                 region = gdk_region_copy (new_sel->covered_region);
6064                         }
6065                 } else if (old_sel && !new_sel) {
6066                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
6067                                 region = gdk_region_copy (old_sel->covered_region);
6068                         }
6069                 } else if (!old_sel && new_sel) {
6070                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
6071                                 region = gdk_region_copy (new_sel->covered_region);
6072                         }
6073                 } else {
6074                         g_assert_not_reached ();
6075                 }
6076
6077                 /* Redraw the damaged region! */
6078                 if (region) {
6079                         GdkRectangle page_area;
6080                         GtkBorder border;
6081
6082                         /* I don't know why but the region is smaller
6083                          * than expected. This hack fixes it, I guess
6084                          * 10 pixels more won't hurt
6085                          */
6086                         gdk_region_shrink (region, -5, -5);
6087
6088                         get_page_extents (view, cur_page, &page_area, &border);
6089                         gdk_region_offset (region,
6090                                            page_area.x + border.left - view->scroll_x,
6091                                            page_area.y + border.top - view->scroll_y);
6092                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
6093                         gdk_region_destroy (region);
6094                 }
6095         }
6096
6097         /* Free the old list, now that we're done with it. */
6098         g_list_foreach (old_list, (GFunc) selection_free, NULL);
6099         g_list_free (old_list);
6100 }
6101
6102 static void
6103 compute_selections (EvView          *view,
6104                     EvSelectionStyle style,
6105                     GdkPoint        *start,
6106                     GdkPoint        *stop)
6107 {
6108         GList *list;
6109
6110         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
6111                 list = compute_new_selection_rect (view, start, stop);
6112         else
6113                 list = compute_new_selection_text (view, style, start, stop);
6114         merge_selection_region (view, list);
6115 }
6116
6117 /* Free's the selection.  It's up to the caller to queue redraws if needed.
6118  */
6119 static void
6120 selection_free (EvViewSelection *selection)
6121 {
6122         if (selection->covered_region)
6123                 gdk_region_destroy (selection->covered_region);
6124         g_free (selection);
6125 }
6126
6127 static void
6128 clear_selection (EvView *view)
6129 {
6130         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6131         g_list_free (view->selection_info.selections);
6132         view->selection_info.selections = NULL;
6133         view->selection_info.in_selection = FALSE;
6134         if (view->pixbuf_cache)
6135                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6136         g_object_notify (G_OBJECT (view), "has-selection");
6137 }
6138
6139 void
6140 ev_view_select_all (EvView *view)
6141 {
6142         GList *selections = NULL;
6143         int n_pages, i;
6144
6145         /* Disable selection on rotated pages for the 0.4.0 series */
6146         if (view->rotation != 0)
6147                 return;
6148
6149         clear_selection (view);
6150
6151         n_pages = ev_document_get_n_pages (view->document);
6152         for (i = 0; i < n_pages; i++) {
6153                 gdouble width, height;
6154                 EvViewSelection *selection;
6155
6156                 get_doc_page_size (view, i, &width, &height);
6157
6158                 selection = g_new0 (EvViewSelection, 1);
6159                 selection->page = i;
6160                 selection->style = EV_SELECTION_STYLE_GLYPH;
6161                 selection->rect.x1 = selection->rect.y1 = 0;
6162                 selection->rect.x2 = width;
6163                 selection->rect.y2 = height;
6164
6165                 selections = g_list_append (selections, selection);
6166         }
6167
6168         merge_selection_region (view, selections);
6169         gtk_widget_queue_draw (GTK_WIDGET (view));
6170 }
6171
6172 gboolean
6173 ev_view_get_has_selection (EvView *view)
6174 {
6175         return view->selection_info.selections != NULL;
6176 }
6177
6178 static char *
6179 get_selected_text (EvView *view)
6180 {
6181         GString *text;
6182         GList *l;
6183         gchar *normalized_text;
6184         EvRenderContext *rc;
6185
6186         text = g_string_new (NULL);
6187         rc = ev_render_context_new (NULL, view->rotation, view->scale);
6188
6189         ev_document_doc_mutex_lock ();
6190
6191         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6192                 EvViewSelection *selection = (EvViewSelection *)l->data;
6193                 EvPage *page;
6194                 gchar *tmp;
6195
6196                 page = ev_document_get_page (view->document, selection->page);
6197                 ev_render_context_set_page (rc, page);
6198                 g_object_unref (page);
6199
6200                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6201                                                       rc, selection->style,
6202                                                       &(selection->rect));
6203
6204                 g_string_append (text, tmp);
6205                 g_free (tmp);
6206         }
6207
6208         g_object_unref (rc);
6209
6210         ev_document_doc_mutex_unlock ();
6211
6212         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6213         g_string_free (text, TRUE);
6214         return normalized_text;
6215 }
6216
6217 static void
6218 ev_view_clipboard_copy (EvView      *view,
6219                         const gchar *text)
6220 {
6221         GtkClipboard *clipboard;
6222
6223         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6224                                               GDK_SELECTION_CLIPBOARD);
6225         gtk_clipboard_set_text (clipboard, text, -1);
6226 }
6227
6228 void
6229 ev_view_copy (EvView *ev_view)
6230 {
6231         char *text;
6232
6233         if (!EV_IS_SELECTION (ev_view->document))
6234                 return;
6235
6236         text = get_selected_text (ev_view);
6237         ev_view_clipboard_copy (ev_view, text);
6238         g_free (text);
6239 }
6240
6241 static void
6242 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6243                         GtkSelectionData *selection_data,
6244                         guint             info,
6245                         gpointer          data)
6246 {
6247         EvView *ev_view = EV_VIEW (data);
6248
6249         if (ev_view->link_selected) {
6250                 gtk_selection_data_set_text (selection_data,
6251                                              ev_link_action_get_uri (ev_view->link_selected),
6252                                              -1);
6253         } else if (EV_IS_SELECTION (ev_view->document) &&
6254                    ev_view->selection_info.selections) {
6255                 gchar *text;
6256
6257                 text = get_selected_text (ev_view);
6258                 if (text) {
6259                         gtk_selection_data_set_text (selection_data, text, -1);
6260                         g_free (text);
6261                 }
6262         }
6263 }
6264
6265 static void
6266 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6267                           gpointer      data)
6268 {
6269         EvView *view = EV_VIEW (data);
6270
6271         clear_selection (view);
6272         clear_link_selected (view);
6273 }
6274
6275 static void
6276 ev_view_update_primary_selection (EvView *ev_view)
6277 {
6278         GtkClipboard *clipboard;
6279
6280         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6281                                               GDK_SELECTION_PRIMARY);
6282
6283         if (ev_view->selection_info.selections || ev_view->link_selected) {
6284                 GtkTargetList *target_list;
6285                 GtkTargetEntry *targets;
6286                 int n_targets;
6287
6288                 target_list = gtk_target_list_new (NULL, 0);
6289                 gtk_target_list_add_text_targets (target_list, 0);
6290                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6291                 gtk_target_list_unref (target_list);
6292
6293                 if (!gtk_clipboard_set_with_owner (clipboard,
6294                                                    targets, n_targets,
6295                                                    ev_view_primary_get_cb,
6296                                                    ev_view_primary_clear_cb,
6297                                                    G_OBJECT (ev_view)))
6298                         ev_view_primary_clear_cb (clipboard, ev_view);
6299
6300                 gtk_target_table_free (targets, n_targets);
6301         } else {
6302                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6303                         gtk_clipboard_clear (clipboard);
6304         }
6305 }
6306
6307 static void
6308 clear_link_selected (EvView *view)
6309 {
6310         if (view->link_selected) {
6311                 g_object_unref (view->link_selected);
6312                 view->link_selected = NULL;
6313         }
6314 }
6315
6316 void
6317 ev_view_copy_link_address (EvView       *view,
6318                            EvLinkAction *action)
6319 {
6320         clear_link_selected (view);
6321
6322         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6323
6324         view->link_selected = g_object_ref (action);
6325         ev_view_update_primary_selection (view);
6326 }
6327
6328 /*** Cursor operations ***/
6329
6330 static GdkCursor *
6331 ev_view_create_invisible_cursor(void)
6332 {
6333        GdkBitmap *empty;
6334        GdkColor black = { 0, 0, 0, 0 };
6335        static char bits[] = { 0x00 };
6336
6337        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
6338
6339        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
6340 }
6341
6342 static void
6343 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6344 {
6345         GdkCursor *cursor = NULL;
6346         GdkDisplay *display;
6347         GtkWidget *widget;
6348
6349         if (view->cursor == new_cursor) {
6350                 return;
6351         }
6352
6353         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6354         display = gtk_widget_get_display (widget);
6355         view->cursor = new_cursor;
6356
6357         switch (new_cursor) {
6358                 case EV_VIEW_CURSOR_NORMAL:
6359                         gdk_window_set_cursor (view->layout.bin_window, NULL);
6360                         break;
6361                 case EV_VIEW_CURSOR_IBEAM:
6362                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
6363                         break;
6364                 case EV_VIEW_CURSOR_LINK:
6365                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
6366                         break;
6367                 case EV_VIEW_CURSOR_WAIT:
6368                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
6369                         break;
6370                 case EV_VIEW_CURSOR_HIDDEN:
6371                         cursor = ev_view_create_invisible_cursor ();
6372                         break;
6373                 case EV_VIEW_CURSOR_DRAG:
6374                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
6375                         break;
6376                 case EV_VIEW_CURSOR_AUTOSCROLL:
6377                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
6378                         break;
6379         }
6380
6381         if (cursor) {
6382                 gdk_window_set_cursor (view->layout.bin_window, cursor);
6383                 gdk_cursor_unref (cursor);
6384                 gdk_flush();
6385         }
6386 }
6387
6388 void
6389 ev_view_hide_cursor (EvView *view)
6390 {
6391        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6392 }
6393
6394 void
6395 ev_view_show_cursor (EvView *view)
6396 {
6397        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6398 }
6399
6400 static void
6401 ev_view_reset_presentation_state (EvView *view)
6402 {
6403         if (!view->presentation ||
6404             view->presentation_state == EV_PRESENTATION_NORMAL)
6405                 return;
6406
6407         view->presentation_state = EV_PRESENTATION_NORMAL;
6408         gdk_window_set_background (view->layout.bin_window,
6409                                    &GTK_WIDGET (view)->style->black);
6410         gtk_widget_queue_draw (GTK_WIDGET (view));
6411 }
6412
6413 gboolean
6414 ev_view_next_page (EvView *view)
6415 {
6416         int page, n_pages;
6417
6418         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6419
6420         if (!view->document)
6421                 return FALSE;
6422
6423         if (view->presentation &&
6424             (view->presentation_state == EV_PRESENTATION_BLACK ||
6425              view->presentation_state == EV_PRESENTATION_WHITE)) {
6426                 ev_view_reset_presentation_state (view);
6427                 return FALSE;
6428         }
6429
6430         if (view->animation) {
6431                 ev_view_transition_animation_cancel (view->animation, view);
6432         }
6433
6434         ev_view_presentation_transition_stop (view);
6435         ev_view_reset_presentation_state (view);
6436
6437         page = ev_document_model_get_page (view->model);
6438         n_pages = ev_document_get_n_pages (view->document);
6439
6440         if (view->dual_page && !view->presentation)
6441                 page = page + 2;
6442         else
6443                 page = page + 1;
6444
6445         if (page < n_pages) {
6446                 ev_document_model_set_page (view->model, page);
6447                 return TRUE;
6448         } else if (view->presentation && page == n_pages) {
6449                 view->presentation_state = EV_PRESENTATION_END;
6450                 gtk_widget_queue_draw (GTK_WIDGET (view));
6451                 return TRUE;
6452         } else if (view->dual_page && page == n_pages) {
6453                 ev_document_model_set_page (view->model, page - 1);
6454                 return TRUE;
6455         } else {
6456                 return FALSE;
6457         }
6458 }
6459
6460 gboolean
6461 ev_view_previous_page (EvView *view)
6462 {
6463         int page;
6464
6465         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6466
6467         if (!view->document)
6468                 return FALSE;
6469
6470         if (view->presentation &&
6471             view->presentation_state == EV_PRESENTATION_END) {
6472                 ev_view_reset_presentation_state (view);
6473                 return TRUE;
6474         }
6475
6476         if (view->presentation &&
6477             (view->presentation_state == EV_PRESENTATION_BLACK ||
6478              view->presentation_state == EV_PRESENTATION_WHITE)) {
6479                 ev_view_reset_presentation_state (view);
6480                 return FALSE;
6481         }
6482
6483         if (view->animation) {
6484                 ev_view_transition_animation_cancel (view->animation, view);
6485         }
6486
6487         ev_view_reset_presentation_state (view);
6488
6489         page = ev_document_model_get_page (view->model);
6490
6491         if (view->dual_page && !view->presentation)
6492                 page = page - 2;
6493         else
6494                 page = page - 1;
6495
6496         if (page >= 0) {
6497                 ev_document_model_set_page (view->model, page);
6498                 return TRUE;
6499         } else if (ev_view_get_dual_page (view) && page == -1) {
6500                 ev_document_model_set_page (view->model, 0);
6501                 return TRUE;
6502         } else {
6503                 return FALSE;
6504         }
6505 }
6506