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-page-cache.h"
  38 #include "ev-pixbuf-cache.h"
  39 #include "ev-transition-animation.h"
  40 #include "ev-view-marshal.h"
  41 #include "ev-document-annotations.h"
  42 #include "ev-annotation-window.h"
  43 #include "ev-view.h"
  44 #include "ev-view-accessible.h"
  45 #include "ev-view-private.h"
  46 #include "ev-view-type-builtins.h"
  47
  48 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  49 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  50 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  51
  52 enum {
  53         PROP_0,
  54         PROP_CONTINUOUS,
  55         PROP_DUAL_PAGE,
  56         PROP_FULLSCREEN,
  57         PROP_PRESENTATION,
  58         PROP_SIZING_MODE,
  59         PROP_ZOOM,
  60         PROP_ROTATION,
  61         PROP_HAS_SELECTION,
  62 };
  63
  64 enum {
  65         SIGNAL_BINDING_ACTIVATED,
  66         SIGNAL_ZOOM_INVALID,
  67         SIGNAL_HANDLE_LINK,
  68         SIGNAL_EXTERNAL_LINK,
  69         SIGNAL_POPUP_MENU,
  70         N_SIGNALS,
  71 };
  72
  73 enum {
  74         TARGET_DND_URI,
  75         TARGET_DND_TEXT,
  76         TARGET_DND_IMAGE
  77 };
  78
  79 static guint signals[N_SIGNALS];
  80
  81 typedef enum {
  82         EV_VIEW_FIND_NEXT,
  83         EV_VIEW_FIND_PREV
  84 } EvViewFindDirection;
  85
  86 #define ZOOM_IN_FACTOR  1.2
  87 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  88
  89 #define MIN_SCALE 0.05409
  90 #define MAX_SCALE 4.0
  91
  92 #define SCROLL_TIME 150
  93
  94 /*** Scrolling ***/
  95 static void       scroll_to_current_page                     (EvView *view,
  96                                                               GtkOrientation orientation);
  97 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  98                                                               GtkAdjustment      *hadjustment,
  99                                                               GtkAdjustment      *vadjustment);
 100 static void       view_update_range_and_current_page         (EvView             *view);
 101 static void       set_scroll_adjustment                      (EvView             *view,
 102                                                               GtkOrientation      orientation,
 103                                                               GtkAdjustment      *adjustment);
 104 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 105                                                               guint               keyval,
 106                                                               GdkModifierType modifiers,
 107                                                               GtkScrollType       scroll,
 108                                                               gboolean            horizontal);
 109 static void       ensure_rectangle_is_visible                (EvView             *view,
 110                                                               GdkRectangle       *rect);
 111
 112 /*** Geometry computations ***/
 113 static void       compute_border                             (EvView             *view,
 114                                                               int                 width,
 115                                                               int                 height,
 116                                                               GtkBorder          *border);
 117 static void       get_page_y_offset                          (EvView             *view,
 118                                                               int                 page,
 119                                                               int                *y_offset);
 120 static gboolean   get_page_extents                           (EvView             *view,
 121                                                               gint                page,
 122                                                               GdkRectangle       *page_area,
 123                                                               GtkBorder          *border);
 124 static void       view_rect_to_doc_rect                      (EvView             *view,
 125                                                               GdkRectangle       *view_rect,
 126                                                               GdkRectangle       *page_area,
 127                                                               EvRectangle        *doc_rect);
 128 static void       doc_rect_to_view_rect                      (EvView             *view,
 129                                                               int                 page,
 130                                                               EvRectangle        *doc_rect,
 131                                                               GdkRectangle       *view_rect);
 132 static void       find_page_at_location                      (EvView             *view,
 133                                                               gdouble             x,
 134                                                               gdouble             y,
 135                                                               gint               *page,
 136                                                               gint               *x_offset,
 137                                                               gint               *y_offset);
 138 static gboolean  doc_point_to_view_point                     (EvView             *view,
 139                                                               int                 page,
 140                                                               EvPoint            *doc_point,
 141                                                               GdkPoint           *view_point);
 142 /*** Hyperrefs ***/
 143 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 144                                                               gdouble             x,
 145                                                               gdouble             y);
 146 static char*      tip_from_link                              (EvView             *view,
 147                                                               EvLink             *link);
 148 /*** Forms ***/
 149 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 150                                                                gdouble            x,
 151                                                                gdouble            y);
 152
 153 /*** Annotations ***/
 154 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 155                                                               gdouble             x,
 156                                                               gdouble             y);
 157 static void          show_annotation_windows                 (EvView             *view,
 158                                                               gint                page);
 159 static void          hide_annotation_windows                 (EvView             *view,
 160                                                               gint                page);
 161 /*** GtkWidget implementation ***/
 162 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 163                                                               GtkRequisition     *requisition);
 164 static void       ev_view_size_request_continuous            (EvView             *view,
 165                                                               GtkRequisition     *requisition);
 166 static void       ev_view_size_request_dual_page             (EvView             *view,
 167                                                               GtkRequisition     *requisition);
 168 static void       ev_view_size_request_single_page           (EvView             *view,
 169                                                               GtkRequisition     *requisition);
 170 static void       ev_view_size_request                       (GtkWidget          *widget,
 171                                                               GtkRequisition     *requisition);
 172 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 173                                                               GtkAllocation      *allocation);
 174 static void       ev_view_realize                            (GtkWidget          *widget);
 175 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 176                                                               GdkEventScroll     *event);
 177 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 178                                                               GdkEventExpose     *event);
 179 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 180 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 181                                                               GdkEventButton     *event);
 182 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 183                                                               GdkEventMotion     *event);
 184 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 185                                                               GdkEventButton     *event);
 186 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 187                                                               GdkEventCrossing   *event);
 188 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 189                                                               GdkEventCrossing   *event);
 190 static void       ev_view_style_set                          (GtkWidget          *widget,
 191                                                               GtkStyle           *old_style);
 192 static void       ev_view_remove_all                         (EvView             *view);
 193
 194 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 195
 196 /*** Drawing ***/
 197 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 198 static void       draw_rubberband                            (GtkWidget          *widget,
 199                                                               GdkWindow          *window,
 200                                                               const GdkRectangle *rect,
 201                                                               guchar              alpha);
 202 static void       highlight_find_results                     (EvView             *view,
 203                                                               int                 page);
 204 static void       draw_one_page                              (EvView             *view,
 205                                                               gint                page,
 206                                                               cairo_t            *cr,
 207                                                               GdkRectangle       *page_area,
 208                                                               GtkBorder          *border,
 209                                                               GdkRectangle       *expose_area,
 210                                                               gboolean           *page_ready);
 211 static void       draw_loading_text                          (EvView             *view,
 212                                                               GdkRectangle       *page_area,
 213                                                               GdkRectangle       *expose_area);
 214 static void       ev_view_reload_page                        (EvView             *view,
 215                                                               gint                page,
 216                                                               GdkRegion          *region);
 217
 218 /*** Callbacks ***/
 219 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 220                                                               GdkRegion          *region,
 221                                                               EvView             *view);
 222 static void       page_changed_cb                            (EvPageCache        *page_cache,
 223                                                               int                 new_page,
 224                                                               EvView             *view);
 225 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 226                                                               EvView             *view);
 227
 228 /*** GObject ***/
 229 static void       ev_view_finalize                           (GObject            *object);
 230 static void       ev_view_destroy                            (GtkObject          *object);
 231 static void       ev_view_set_property                       (GObject            *object,
 232                                                               guint               prop_id,
 233                                                               const GValue       *value,
 234                                                               GParamSpec         *pspec);
 235 static void       ev_view_get_property                       (GObject            *object,
 236                                                               guint               prop_id,
 237                                                               GValue             *value,
 238                                                               GParamSpec         *pspec);
 239 static void       ev_view_class_init                         (EvViewClass        *class);
 240 static void       ev_view_init                               (EvView             *view);
 241
 242 /*** Zoom and sizing ***/
 243 static double   zoom_for_size_fit_width                      (gdouble doc_width,
 244                                                               gdouble doc_height,
 245                                                               int     target_width,
 246                                                               int     target_height,
 247                                                               int     vsb_width);
 248 static double   zoom_for_size_fit_height                     (gdouble doc_width,
 249                                                               gdouble doc_height,
 250                                                               int     target_width,
 251                                                               int     target_height,
 252                                                               int     vsb_height);
 253 static double   zoom_for_size_best_fit                       (gdouble doc_width,
 254                                                               gdouble doc_height,
 255                                                               int     target_width,
 256                                                               int     target_height,
 257                                                               int     vsb_width,
 258                                                               int     hsb_width);
 259 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 260                                                               int     width,
 261                                                               int     height);
 262 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 263                                                                 int     width,
 264                                                                 int     height,
 265                                                                 int     vsb_width,
 266                                                                 int     hsb_height);
 267 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 268                                                                 int     width,
 269                                                                 int     height,
 270                                                                 int     vsb_width,
 271                                                                 int     hsb_height);
 272 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 273                                                                 int     width,
 274                                                                 int     height,
 275                                                                 int     vsb_width,
 276                                                                 int     hsb_height);
 277 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 278                                                                 int     width,
 279                                                                 int     height,
 280                                                                 int     vsb_width,
 281                                                                 int     hsb_height);
 282 /*** Cursors ***/
 283 static GdkCursor* ev_view_create_invisible_cursor            (void);
 284 static void       ev_view_set_cursor                         (EvView             *view,
 285                                                               EvViewCursor        new_cursor);
 286 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 287                                                               gint x,
 288                                                               gint y);
 289
 290 /*** Find ***/
 291 static gint         ev_view_find_get_n_results               (EvView             *view,
 292                                                               gint                page);
 293 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 294                                                               gint                page,
 295                                                               gint                result);
 296 static void       jump_to_find_result                        (EvView             *view);
 297 static void       jump_to_find_page                          (EvView             *view,
 298                                                               EvViewFindDirection direction,
 299                                                               gint                shift);
 300
 301 /*** Selection ***/
 302 static void       compute_selections                         (EvView             *view,
 303                                                               EvSelectionStyle    style,
 304                                                               GdkPoint           *start,
 305                                                               GdkPoint           *stop);
 306 static void       clear_selection                            (EvView             *view);
 307 static void       clear_link_selected                        (EvView             *view);
 308 static void       selection_free                             (EvViewSelection    *selection);
 309 static char*      get_selected_text                          (EvView             *ev_view);
 310 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 311                                                               GtkSelectionData   *selection_data,
 312                                                               guint               info,
 313                                                               gpointer            data);
 314 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 315                                                               gpointer            data);
 316 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 317
 318 /*** Presentation ***/
 319 static void       ev_view_presentation_transition_start      (EvView             *ev_view);
 320 static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
 321
 322
 323 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 324
 325 /* HeightToPage cache */
 326 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 327
 328 static void
 329 build_height_to_page (EvHeightToPageCache *cache,
 330                       EvDocument          *document,
 331                       gint                 rotation)
 332 {
 333         gboolean swap, uniform, dual_even_left;
 334         int i;
 335         double uniform_height, page_height, next_page_height;
 336         double saved_height;
 337         gdouble u_width, u_height;
 338         gint n_pages;
 339
 340         swap = (rotation == 90 || rotation == 270);
 341
 342         uniform = ev_document_is_page_size_uniform (document);
 343         n_pages = ev_document_get_n_pages (document);
 344         dual_even_left = (n_pages > 2);
 345
 346         g_free (cache->height_to_page);
 347         g_free (cache->dual_height_to_page);
 348
 349         cache->rotation = rotation;
 350         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 351         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 352
 353         if (uniform)
 354                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 355
 356         saved_height = 0;
 357         for (i = 0; i <= n_pages; i++) {
 358                 if (uniform) {
 359                         uniform_height = swap ? u_width : u_height;
 360                         cache->height_to_page[i] = i * uniform_height;
 361                 } else {
 362                         if (i < n_pages) {
 363                                 gdouble w, h;
 364
 365                                 ev_document_get_page_size (document, i, &w, &h);
 366                                 page_height = swap ? w : h;
 367                         } else {
 368                                 page_height = 0;
 369                         }
 370                         cache->height_to_page[i] = saved_height;
 371                         saved_height += page_height;
 372                 }
 373         }
 374
 375         if (dual_even_left && !uniform) {
 376                 gdouble w, h;
 377
 378                 ev_document_get_page_size (document, 0, &w, &h);
 379                 saved_height = swap ? w : h;
 380         } else {
 381                 saved_height = 0;
 382         }
 383
 384         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 385                 if (uniform) {
 386                         uniform_height = swap ? u_width : u_height;
 387                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 388                         if (i + 1 < n_pages + 2)
 389                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 390                 } else {
 391                         if (i + 1 < n_pages) {
 392                                 gdouble w, h;
 393
 394                                 ev_document_get_page_size (document, i + 1, &w, &h);
 395                                 next_page_height = swap ? w : h;
 396                         } else {
 397                                 next_page_height = 0;
 398                         }
 399
 400                         if (i < n_pages) {
 401                                 gdouble w, h;
 402
 403                                 ev_document_get_page_size (document, i, &w, &h);
 404                                 page_height = swap ? w : h;
 405                         } else {
 406                                 page_height = 0;
 407                         }
 408
 409                         if (i + 1 < n_pages + 2) {
 410                                 cache->dual_height_to_page[i] = saved_height;
 411                                 cache->dual_height_to_page[i + 1] = saved_height;
 412                                 saved_height += MAX(page_height, next_page_height);
 413                         } else {
 414                                 cache->dual_height_to_page[i] = saved_height;
 415                         }
 416                 }
 417         }
 418 }
 419
 420 static void
 421 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 422                                     EvDocument          *document,
 423                                     gint                 page,
 424                                     gint                 rotation,
 425                                     gdouble             *height,
 426                                     gdouble             *dual_height)
 427 {
 428         if (cache->rotation != rotation)
 429                 build_height_to_page (cache, document, rotation);
 430
 431         *height = cache->height_to_page[page];
 432         *dual_height = cache->dual_height_to_page[page];
 433 }
 434
 435 static void
 436 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 437 {
 438         if (cache->height_to_page) {
 439                 g_free (cache->height_to_page);
 440                 cache->height_to_page = NULL;
 441         }
 442
 443         if (cache->dual_height_to_page) {
 444                 g_free (cache->dual_height_to_page);
 445                 cache->dual_height_to_page = NULL;
 446         }
 447         g_free (cache);
 448 }
 449
 450 static EvHeightToPageCache *
 451 ev_view_get_height_to_page_cache (EvView *view)
 452 {
 453         EvHeightToPageCache *cache;
 454
 455         if (!view->document)
 456                 return NULL;
 457
 458         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 459         if (!cache) {
 460                 cache = g_new0 (EvHeightToPageCache, 1);
 461                 build_height_to_page (cache, view->document, view->rotation);
 462                 g_object_set_data_full (G_OBJECT (view->document),
 463                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 464                                         cache,
 465                                         (GDestroyNotify)ev_height_to_page_cache_free);
 466         }
 467
 468         return cache;
 469 }
 470
 471 static void
 472 ev_view_get_height_to_page (EvView *view,
 473                             gint    page,
 474                             gint   *height,
 475                             gint   *dual_height)
 476 {
 477         gdouble h, dh;
 478
 479         if (!view->height_to_page_cache)
 480                 return;
 481
 482         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 483                                             view->document,
 484                                             page,
 485                                             view->rotation,
 486                                             &h, &dh);
 487         if (height)
 488                 *height = (gint)(h * view->scale + 0.5);
 489
 490         if (dual_height)
 491                 *dual_height = (gint)(dh * view->scale + 0.5);
 492 }
 493
 494 static void
 495 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 496 {
 497         GdkPoint view_point;
 498
 499         if (view->document == NULL) {
 500                 return;
 501         }
 502
 503         doc_point_to_view_point (view, view->current_page, &view->pending_point, &view_point);
 504
 505         if (orientation == GTK_ORIENTATION_VERTICAL) {
 506                 view->pending_point.y = 0;
 507         } else {
 508                 view->pending_point.x = 0;
 509         }
 510
 511         if (orientation == GTK_ORIENTATION_VERTICAL) {
 512                 if (view->continuous) {
 513                         gtk_adjustment_clamp_page (view->vadjustment,
 514                                                    view_point.y - view->spacing / 2,
 515                                                    view_point.y + view->vadjustment->page_size);
 516                 } else {
 517                         gtk_adjustment_set_value (view->vadjustment,
 518                                                   CLAMP (view_point.y,
 519                                                   view->vadjustment->lower,
 520                                                   view->vadjustment->upper -
 521                                                   view->vadjustment->page_size));
 522                 }
 523         } else {
 524                 if (view->dual_page) {
 525                         gtk_adjustment_clamp_page (view->hadjustment,
 526                                                    view_point.x,
 527                                                    view_point.x + view->hadjustment->page_size);
 528                 } else {
 529                         gtk_adjustment_set_value (view->hadjustment,
 530                                                   CLAMP (view_point.x,
 531                                                   view->hadjustment->lower,
 532                                                   view->hadjustment->upper -
 533                                                   view->hadjustment->page_size));
 534                 }
 535         }
 536 }
 537
 538 static void
 539 view_set_adjustment_values (EvView         *view,
 540                             GtkOrientation  orientation)
 541 {
 542         GtkWidget *widget = GTK_WIDGET (view);
 543         GtkAdjustment *adjustment;
 544         int requisition;
 545         int allocation;
 546
 547         double factor;
 548         gint new_value;
 549
 550         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 551                 requisition = widget->requisition.width;
 552                 allocation = widget->allocation.width;
 553                 adjustment = view->hadjustment;
 554         } else {
 555                 requisition = widget->requisition.height;
 556                 allocation = widget->allocation.height;
 557                 adjustment = view->vadjustment;
 558         }
 559
 560         if (!adjustment)
 561                 return;
 562
 563         factor = 1.0;
 564         switch (view->pending_scroll) {
 565                 case SCROLL_TO_KEEP_POSITION:
 566                 case SCROLL_TO_FIND_LOCATION:
 567                         factor = (adjustment->value) / adjustment->upper;
 568                         break;
 569                 case SCROLL_TO_PAGE_POSITION:
 570                         break;
 571                 case SCROLL_TO_CENTER:
 572                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 573                         break;
 574         }
 575
 576         adjustment->page_size = allocation;
 577         adjustment->step_increment = allocation * 0.1;
 578         adjustment->page_increment = allocation * 0.9;
 579         adjustment->lower = 0;
 580         adjustment->upper = MAX (allocation, requisition);
 581
 582         /*
 583          * We add 0.5 to the values before to average out our rounding errors.
 584          */
 585         switch (view->pending_scroll) {
 586                 case SCROLL_TO_KEEP_POSITION:
 587                 case SCROLL_TO_FIND_LOCATION:
 588                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 589                         gtk_adjustment_set_value (adjustment, (int)new_value);
 590                         break;
 591                 case SCROLL_TO_PAGE_POSITION:
 592                         scroll_to_current_page (view, orientation);
 593                         break;
 594                 case SCROLL_TO_CENTER:
 595                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 596                                            0, adjustment->upper - adjustment->page_size);
 597                         gtk_adjustment_set_value (adjustment, (int)new_value);
 598                         break;
 599         }
 600
 601         gtk_adjustment_changed (adjustment);
 602 }
 603
 604 static void
 605 view_update_range_and_current_page (EvView *view)
 606 {
 607         gint current_page;
 608         gint best_current_page = -1;
 609         gint start = view->start_page;
 610         gint end = view->end_page;
 611
 612         /* Presentation trumps all other modes */
 613         if (view->presentation) {
 614                 view->start_page = view->current_page;
 615                 view->end_page = view->current_page;
 616         } else if (view->continuous) {
 617                 GdkRectangle current_area, unused, page_area;
 618                 GtkBorder border;
 619                 gboolean found = FALSE;
 620                 gint area_max = -1, area;
 621                 int i;
 622
 623                 if (!(view->vadjustment && view->hadjustment))
 624                         return;
 625
 626                 current_area.x = view->hadjustment->value;
 627                 current_area.width = view->hadjustment->upper;
 628                 current_area.y = view->vadjustment->value;
 629                 current_area.height = view->vadjustment->page_size;
 630
 631                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 632
 633                         get_page_extents (view, i, &page_area, &border);
 634
 635                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 636                                 area = unused.width * unused.height;
 637
 638                                 if (!found) {
 639                                         area_max = area;
 640                                         view->start_page = i;
 641                                         found = TRUE;
 642                                         best_current_page = i;
 643                                 }
 644                                 if (area > area_max) {
 645                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 646                                         area_max = area;
 647                                 }
 648
 649                                 view->end_page = i;
 650                         } else if (found && view->current_page <= view->end_page) {
 651                                 break;
 652                         }
 653                 }
 654
 655         } else if (view->dual_page) {
 656                 if (view->current_page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) {
 657                         view->start_page = view->current_page;
 658                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 659                                 view->end_page = view->start_page + 1;
 660                         else
 661                                 view->end_page = view->start_page;
 662                 } else {
 663                         if (view->current_page < 1)
 664                                 view->start_page = view->current_page;
 665                         else
 666                                 view->start_page = view->current_page - 1;
 667                         view->end_page = view->current_page;
 668                 }
 669         } else {
 670                 view->start_page = view->current_page;
 671                 view->end_page = view->current_page;
 672         }
 673
 674         best_current_page = MAX (best_current_page, view->start_page);
 675         current_page = ev_page_cache_get_current_page (view->page_cache);
 676
 677         if ((current_page != best_current_page) && (view->pending_scroll == SCROLL_TO_KEEP_POSITION)) {
 678                 view->current_page = best_current_page;
 679                 ev_page_cache_set_current_page (view->page_cache, best_current_page);
 680         }
 681
 682         if (start != view->start_page || end != view->end_page) {
 683                 gint i;
 684
 685                 for (i = start; i < view->start_page; i++) {
 686                         hide_annotation_windows (view, i);
 687                 }
 688
 689                 for (i = end; i > view->end_page; i--) {
 690                         hide_annotation_windows (view, i);
 691                 }
 692         }
 693
 694         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 695                                         view->start_page,
 696                                         view->end_page,
 697                                         view->rotation,
 698                                         view->scale,
 699                                         view->selection_info.selections);
 700 }
 701
 702 static void
 703 set_scroll_adjustment (EvView *view,
 704                        GtkOrientation  orientation,
 705                        GtkAdjustment  *adjustment)
 706 {
 707         GtkAdjustment **to_set;
 708
 709         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 710                 to_set = &view->hadjustment;
 711         else
 712                 to_set = &view->vadjustment;
 713
 714         if (*to_set != adjustment) {
 715                 if (*to_set) {
 716                         g_signal_handlers_disconnect_by_func (*to_set,
 717                                                               (gpointer) on_adjustment_value_changed,
 718                                                               view);
 719                         g_object_unref (*to_set);
 720                 }
 721
 722                 *to_set = adjustment;
 723                 view_set_adjustment_values (view, orientation);
 724
 725                 if (*to_set) {
 726                         g_object_ref (*to_set);
 727                         g_signal_connect (*to_set, "value_changed",
 728                                           G_CALLBACK (on_adjustment_value_changed), view);
 729                 }
 730         }
 731 }
 732
 733 static void
 734 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 735                                 GtkAdjustment  *hadjustment,
 736                                 GtkAdjustment  *vadjustment)
 737 {
 738         EvView *view = EV_VIEW (layout);
 739
 740         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 741         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 742
 743         on_adjustment_value_changed (NULL, view);
 744 }
 745
 746 static void
 747 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 748                            guint           keyval,
 749                            GdkModifierType modifiers,
 750                            GtkScrollType   scroll,
 751                            gboolean        horizontal)
 752 {
 753   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 754
 755   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 756                                 "binding_activated", 2,
 757                                 GTK_TYPE_SCROLL_TYPE, scroll,
 758                                 G_TYPE_BOOLEAN, horizontal);
 759   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 760                                 "binding_activated", 2,
 761                                 GTK_TYPE_SCROLL_TYPE, scroll,
 762                                 G_TYPE_BOOLEAN, horizontal);
 763 }
 764
 765 void
 766 ev_view_scroll (EvView        *view,
 767                 GtkScrollType  scroll,
 768                 gboolean       horizontal)
 769 {
 770         GtkAdjustment *adjustment;
 771         double value, increment;
 772         gboolean first_page = FALSE;
 773         gboolean last_page = FALSE;
 774
 775         view->jump_to_find_result = FALSE;
 776
 777         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 778                 switch (scroll) {
 779                         case GTK_SCROLL_PAGE_BACKWARD:
 780                         case GTK_SCROLL_STEP_BACKWARD:
 781                                 ev_view_previous_page (view);
 782                                 break;
 783                         case GTK_SCROLL_PAGE_FORWARD:
 784                         case GTK_SCROLL_STEP_FORWARD:
 785                                 ev_view_next_page (view);
 786                                 break;
 787                         default:
 788                                 break;
 789                 }
 790                 return;
 791         }
 792
 793         /* Assign values for increment and vertical adjustment */
 794         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 795         increment = adjustment->page_size * 0.75;
 796         value = adjustment->value;
 797
 798         /* Assign boolean for first and last page */
 799         if (view->current_page == 0)
 800                 first_page = TRUE;
 801         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 802                 last_page = TRUE;
 803
 804         switch (scroll) {
 805                 case GTK_SCROLL_PAGE_BACKWARD:
 806                         /* Do not jump backwards if at the first page */
 807                         if (value == (adjustment->lower) && first_page) {
 808                                 /* Do nothing */
 809                                 /* At the top of a page, assign the upper bound limit of previous page */
 810                         } else if (value == (adjustment->lower)) {
 811                                 value = adjustment->upper - adjustment->page_size;
 812                                 ev_view_previous_page (view);
 813                                 /* Jump to the top */
 814                         } else {
 815                                 value = MAX (value - increment, adjustment->lower);
 816                         }
 817                         break;
 818                 case GTK_SCROLL_PAGE_FORWARD:
 819                         /* Do not jump forward if at the last page */
 820                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 821                                 /* Do nothing */
 822                         /* At the bottom of a page, assign the lower bound limit of next page */
 823                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 824                                 value = 0;
 825                                 ev_view_next_page (view);
 826                         /* Jump to the bottom */
 827                         } else {
 828                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 829                         }
 830                         break;
 831                 case GTK_SCROLL_STEP_BACKWARD:
 832                         value -= adjustment->step_increment;
 833                         break;
 834                 case GTK_SCROLL_STEP_FORWARD:
 835                         value += adjustment->step_increment;
 836                         break;
 837                 case GTK_SCROLL_STEP_DOWN:
 838                         value -= adjustment->step_increment / 10;
 839                         break;
 840                 case GTK_SCROLL_STEP_UP:
 841                         value += adjustment->step_increment / 10;
 842                         break;
 843                 default:
 844                         break;
 845         }
 846
 847         value = CLAMP (value, adjustment->lower,
 848                        adjustment->upper - adjustment->page_size);
 849
 850         gtk_adjustment_set_value (adjustment, value);
 851 }
 852
 853 #define MARGIN 5
 854
 855 static void
 856 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 857 {
 858         GtkWidget *widget = GTK_WIDGET (view);
 859         GtkAdjustment *adjustment;
 860         int value;
 861
 862         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 863
 864         adjustment = view->vadjustment;
 865
 866         if (rect->y < adjustment->value) {
 867                 value = MAX (adjustment->lower, rect->y - MARGIN);
 868                 gtk_adjustment_set_value (view->vadjustment, value);
 869         } else if (rect->y + rect->height >
 870                    adjustment->value + widget->allocation.height) {
 871                 value = MIN (adjustment->upper, rect->y + rect->height -
 872                              widget->allocation.height + MARGIN);
 873                 gtk_adjustment_set_value (view->vadjustment, value);
 874         }
 875
 876         adjustment = view->hadjustment;
 877
 878         if (rect->x < adjustment->value) {
 879                 value = MAX (adjustment->lower, rect->x - MARGIN);
 880                 gtk_adjustment_set_value (view->hadjustment, value);
 881         } else if (rect->x + rect->height >
 882                    adjustment->value + widget->allocation.width) {
 883                 value = MIN (adjustment->upper, rect->x + rect->width -
 884                              widget->allocation.width + MARGIN);
 885                 gtk_adjustment_set_value (view->hadjustment, value);
 886         }
 887
 888         gtk_widget_queue_resize (GTK_WIDGET (view));
 889 }
 890
 891 /*** Geometry computations ***/
 892
 893 static void
 894 compute_border (EvView *view, int width, int height, GtkBorder *border)
 895 {
 896         if (view->presentation) {
 897                 border->left = 0;
 898                 border->right = 0;
 899                 border->top = 0;
 900                 border->bottom = 0;
 901         } else {
 902                 ev_document_misc_get_page_border_size (width, height, border);
 903         }
 904 }
 905
 906 static void
 907 get_page_y_offset (EvView *view, int page, int *y_offset)
 908 {
 909         int max_width, offset;
 910         GtkBorder border;
 911
 912         g_return_if_fail (y_offset != NULL);
 913
 914         ev_page_cache_get_max_width (view->page_cache, view->rotation, view->scale, &max_width);
 915
 916         compute_border (view, max_width, max_width, &border);
 917
 918         if (view->dual_page) {
 919                 ev_view_get_height_to_page (view, page, NULL, &offset);
 920                 offset += ((page + ev_page_cache_get_dual_even_left (view->page_cache)) / 2 + 1) * view->spacing + ((page + ev_page_cache_get_dual_even_left (view->page_cache)) / 2 ) * (border.top + border.bottom);
 921         } else {
 922                 ev_view_get_height_to_page (view, page, &offset, NULL);
 923                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 924         }
 925
 926         *y_offset = offset;
 927         return;
 928 }
 929
 930 static gboolean
 931 get_page_extents (EvView       *view,
 932                   gint          page,
 933                   GdkRectangle *page_area,
 934                   GtkBorder    *border)
 935 {
 936         GtkWidget *widget;
 937         int width, height;
 938
 939         widget = GTK_WIDGET (view);
 940
 941         /* Get the size of the page */
 942         ev_page_cache_get_size (view->page_cache, page,
 943                                 view->rotation,
 944                                 view->scale,
 945                                 &width, &height);
 946         compute_border (view, width, height, border);
 947         page_area->width = width + border->left + border->right;
 948         page_area->height = height + border->top + border->bottom;
 949
 950         if (view->presentation) {
 951                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 952                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 953         } else if (view->continuous) {
 954                 gint max_width;
 955                 gint x, y;
 956
 957                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 958                                              view->scale, &max_width);
 959                 max_width = max_width + border->left + border->right;
 960                 /* Get the location of the bounding box */
 961                 if (view->dual_page) {
 962                         x = view->spacing + ((page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? 0 : 1) * (max_width + view->spacing);
 963                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 964                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 965                                 x = x + (max_width - width - border->left - border->right);
 966                 } else {
 967                         x = view->spacing;
 968                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 969                 }
 970
 971                 get_page_y_offset (view, page, &y);
 972
 973                 page_area->x = x;
 974                 page_area->y = y;
 975         } else {
 976                 gint x, y;
 977                 if (view->dual_page) {
 978                         gint width_2, height_2;
 979                         gint max_width = width;
 980                         gint max_height = height;
 981                         GtkBorder overall_border;
 982                         gint other_page;
 983
 984                         other_page = (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? page + 1: page - 1;
 985
 986                         /* First, we get the bounding box of the two pages */
 987                         if (other_page < ev_document_get_n_pages (view->document)
 988                             && (0 <= other_page)) {
 989                                 ev_page_cache_get_size (view->page_cache,
 990                                                         other_page,
 991                                                         view->rotation,
 992                                                         view->scale,
 993                                                         &width_2, &height_2);
 994                                 if (width_2 > width)
 995                                         max_width = width_2;
 996                                 if (height_2 > height)
 997                                         max_height = height_2;
 998                         }
 999                         compute_border (view, max_width, max_height, &overall_border);
1000
1001                         /* Find the offsets */
1002                         x = view->spacing;
1003                         y = view->spacing;
1004
1005                         /* Adjust for being the left or right page */
1006                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
1007                                 x = x + max_width - width;
1008                         else
1009                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1010
1011                         y = y + (max_height - height)/2;
1012
1013                         /* Adjust for extra allocation */
1014                         x = x + MAX (0, widget->allocation.width -
1015                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1016                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
1017                 } else {
1018                         x = view->spacing;
1019                         y = view->spacing;
1020
1021                         /* Adjust for extra allocation */
1022                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1023                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1024                 }
1025
1026                 page_area->x = x;
1027                 page_area->y = y;
1028         }
1029
1030         return TRUE;
1031 }
1032
1033 static void
1034 get_doc_page_size (EvView  *view,
1035                    gint     page,
1036                    gdouble *width,
1037                    gdouble *height)
1038 {
1039         double w, h;
1040
1041         ev_document_get_page_size (view->document, page, &w, &h);
1042         if (view->rotation == 0 || view->rotation == 180) {
1043                 if (width) *width = w;
1044                 if (height) *height = h;
1045         } else {
1046                 if (width) *width = h;
1047                 if (height) *height = w;
1048         }
1049 }
1050
1051 static void
1052 view_point_to_doc_point (EvView *view,
1053                          GdkPoint *view_point,
1054                          GdkRectangle *page_area,
1055                          double  *doc_point_x,
1056                          double  *doc_point_y)
1057 {
1058         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1059         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1060 }
1061
1062 static void
1063 view_rect_to_doc_rect (EvView *view,
1064                        GdkRectangle *view_rect,
1065                        GdkRectangle *page_area,
1066                        EvRectangle  *doc_rect)
1067 {
1068         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1069         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1070         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1071         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1072 }
1073
1074 static gboolean
1075 doc_point_to_view_point (EvView       *view,
1076                          int           page,
1077                          EvPoint      *doc_point,
1078                          GdkPoint     *view_point)
1079 {
1080         GdkRectangle page_area;
1081         GtkBorder border;
1082         double x, y, view_x, view_y;
1083         gdouble width, height;
1084
1085         get_doc_page_size (view, page, &width, &height);
1086
1087         if (view->rotation == 0) {
1088                 x = doc_point->x;
1089                 y = doc_point->y;
1090         } else if (view->rotation == 90) {
1091                 x = width - doc_point->y;
1092                 y = doc_point->x;
1093         } else if (view->rotation == 180) {
1094                 x = width - doc_point->x;
1095                 y = height - doc_point->y;
1096         } else if (view->rotation == 270) {
1097                 x = doc_point->y;
1098                 y = height - doc_point->x;
1099         } else {
1100                 g_assert_not_reached ();
1101         }
1102
1103         get_page_extents (view, page, &page_area, &border);
1104
1105         view_x = x * view->scale;
1106         view_y = y * view->scale;
1107         view_point->x = view_x + page_area.x;
1108         view_point->y = view_y + page_area.y;
1109
1110         return (view_x > 0 && view_x <= page_area.width &&
1111                 view_y > 0 && view_y <= page_area.height);
1112 }
1113
1114 static void
1115 doc_rect_to_view_rect (EvView       *view,
1116                        int           page,
1117                        EvRectangle  *doc_rect,
1118                        GdkRectangle *view_rect)
1119 {
1120         GdkRectangle page_area;
1121         GtkBorder border;
1122         double x, y, w, h;
1123         gdouble width, height;
1124
1125         get_doc_page_size (view, page, &width, &height);
1126
1127         if (view->rotation == 0) {
1128                 x = doc_rect->x1;
1129                 y = doc_rect->y1;
1130                 w = doc_rect->x2 - doc_rect->x1;
1131                 h = doc_rect->y2 - doc_rect->y1;
1132         } else if (view->rotation == 90) {
1133                 x = width - doc_rect->y2;
1134                 y = doc_rect->x1;
1135                 w = doc_rect->y2 - doc_rect->y1;
1136                 h = doc_rect->x2 - doc_rect->x1;
1137         } else if (view->rotation == 180) {
1138                 x = width - doc_rect->x2;
1139                 y = height - doc_rect->y2;
1140                 w = doc_rect->x2 - doc_rect->x1;
1141                 h = doc_rect->y2 - doc_rect->y1;
1142         } else if (view->rotation == 270) {
1143                 x = doc_rect->y1;
1144                 y = height - doc_rect->x2;
1145                 w = doc_rect->y2 - doc_rect->y1;
1146                 h = doc_rect->x2 - doc_rect->x1;
1147         } else {
1148                 g_assert_not_reached ();
1149         }
1150
1151         get_page_extents (view, page, &page_area, &border);
1152
1153         view_rect->x = x * view->scale + page_area.x;
1154         view_rect->y = y * view->scale + page_area.y;
1155         view_rect->width = w * view->scale;
1156         view_rect->height = h * view->scale;
1157 }
1158
1159 static void
1160 find_page_at_location (EvView  *view,
1161                        gdouble  x,
1162                        gdouble  y,
1163                        gint    *page,
1164                        gint    *x_offset,
1165                        gint    *y_offset)
1166 {
1167         int i;
1168
1169         if (view->document == NULL)
1170                 return;
1171
1172         g_assert (page);
1173         g_assert (x_offset);
1174         g_assert (y_offset);
1175
1176         for (i = view->start_page; i <= view->end_page; i++) {
1177                 GdkRectangle page_area;
1178                 GtkBorder border;
1179
1180                 if (! get_page_extents (view, i, &page_area, &border))
1181                         continue;
1182
1183                 if ((x >= page_area.x + border.left) &&
1184                     (x < page_area.x + page_area.width - border.right) &&
1185                     (y >= page_area.y + border.top) &&
1186                     (y < page_area.y + page_area.height - border.bottom)) {
1187                         *page = i;
1188                         *x_offset = x - (page_area.x + border.left);
1189                         *y_offset = y - (page_area.y + border.top);
1190                         return;
1191                 }
1192         }
1193
1194         *page = -1;
1195 }
1196
1197 static gboolean
1198 location_in_text (EvView  *view,
1199                   gdouble  x,
1200                   gdouble  y)
1201 {
1202         GdkRegion *region;
1203         gint page = -1;
1204         gint x_offset = 0, y_offset = 0;
1205
1206         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1207
1208         if (page == -1)
1209                 return FALSE;
1210
1211         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1212
1213         if (region)
1214                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1215         else
1216                 return FALSE;
1217 }
1218
1219 static int
1220 ev_view_get_width (EvView *view)
1221 {
1222         return GTK_WIDGET (view)->allocation.width;
1223 }
1224
1225 static int
1226 ev_view_get_height (EvView *view)
1227 {
1228         return GTK_WIDGET (view)->allocation.height;
1229 }
1230
1231 static gboolean
1232 location_in_selected_text (EvView  *view,
1233                            gdouble  x,
1234                            gdouble  y)
1235 {
1236         gint page = -1;
1237         gint x_offset = 0, y_offset = 0;
1238         EvViewSelection *selection;
1239         GList *l = NULL;
1240
1241         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1242                 selection = (EvViewSelection *)l->data;
1243
1244                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1245
1246                 if (page != selection->page)
1247                         continue;
1248
1249                 if (selection->covered_region &&
1250                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1251                         return TRUE;
1252         }
1253
1254         return FALSE;
1255 }
1256
1257 static gboolean
1258 get_doc_point_from_offset (EvView *view,
1259                            gint    page,
1260                            gint    x_offset,
1261                            gint    y_offset,
1262                            gint   *x_new,
1263                            gint   *y_new)
1264 {
1265         gdouble width, height;
1266         double x, y;
1267
1268         get_doc_page_size (view, page, &width, &height);
1269
1270         x_offset = x_offset / view->scale;
1271         y_offset = y_offset / view->scale;
1272
1273         if (view->rotation == 0) {
1274                 x = x_offset;
1275                 y = y_offset;
1276         } else if (view->rotation == 90) {
1277                 x = y_offset;
1278                 y = width - x_offset;
1279         } else if (view->rotation == 180) {
1280                 x = width - x_offset;
1281                 y = height - y_offset;
1282         } else if (view->rotation == 270) {
1283                 x = height - y_offset;
1284                 y = x_offset;
1285         } else {
1286                 g_assert_not_reached ();
1287         }
1288
1289         *x_new = x;
1290         *y_new = y;
1291
1292         return TRUE;
1293 }
1294
1295 static gboolean
1296 get_doc_point_from_location (EvView  *view,
1297                              gdouble  x,
1298                              gdouble  y,
1299                              gint    *page,
1300                              gint    *x_new,
1301                              gint    *y_new)
1302 {
1303         gint x_offset = 0, y_offset = 0;
1304
1305         x += view->scroll_x;
1306         y += view->scroll_y;
1307         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1308         if (*page == -1)
1309                 return FALSE;
1310
1311         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1312 }
1313
1314 static void
1315 ev_view_get_area_from_mapping (EvView       *view,
1316                                guint         page,
1317                                GList        *mapping_list,
1318                                gconstpointer data,
1319                                GdkRectangle *area)
1320 {
1321         EvMapping *mapping;
1322
1323         mapping = ev_mapping_list_find (mapping_list, data);
1324         doc_rect_to_view_rect (view, page, &mapping->area, area);
1325         area->x -= view->scroll_x;
1326         area->y -= view->scroll_y;
1327 }
1328
1329
1330 /*** Hyperref ***/
1331 static EvLink *
1332 ev_view_get_link_at_location (EvView  *view,
1333                               gdouble  x,
1334                               gdouble  y)
1335 {
1336         gint page = -1;
1337         gint x_new = 0, y_new = 0;
1338         GList *link_mapping;
1339
1340         if (!EV_IS_DOCUMENT_LINKS (view->document))
1341                 return NULL;
1342
1343         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1344                 return NULL;
1345
1346         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1347
1348         if (link_mapping)
1349                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1350         else
1351                 return NULL;
1352 }
1353
1354 static void
1355 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1356 {
1357         EvPoint doc_point;
1358         gdouble zoom, left, top;
1359         gboolean change_left, change_top;
1360
1361         left = ev_link_dest_get_left (dest, &change_left);
1362         top = ev_link_dest_get_top (dest, &change_top);
1363
1364         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1365                                        ev_link_dest_get_bottom (dest) - top,
1366                                        ev_view_get_width (view),
1367                                        ev_view_get_height (view), 0, 0);
1368
1369         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1370         ev_view_set_zoom (view, zoom, FALSE);
1371
1372         doc_point.x = change_left ? left : 0;
1373         doc_point.y = change_top ? top : 0;
1374
1375         view->current_page = ev_link_dest_get_page (dest);
1376         if (change_left || change_top)
1377                 view->pending_point = doc_point;
1378         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1379
1380         gtk_widget_queue_resize (GTK_WIDGET (view));
1381 }
1382
1383 static void
1384 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1385 {
1386         EvPoint doc_point;
1387         gdouble doc_width, doc_height;
1388         gint page;
1389         double zoom, left;
1390         gboolean change_left;
1391
1392         page = ev_link_dest_get_page (dest);
1393         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1394
1395         left = ev_link_dest_get_left (dest, &change_left);
1396         doc_point.x = change_left ? left : 0;
1397         doc_point.y = 0;
1398
1399         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1400                                          ev_view_get_width (view),
1401                                          ev_view_get_height (view), 0);
1402
1403         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1404         ev_view_set_zoom (view, zoom, FALSE);
1405
1406         view->current_page = page;
1407         if (change_left)
1408                 view->pending_point = doc_point;
1409         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1410
1411         gtk_widget_queue_resize (GTK_WIDGET (view));
1412 }
1413
1414 static void
1415 goto_fith_dest (EvView *view, EvLinkDest *dest)
1416 {
1417         EvPoint doc_point;
1418         gdouble doc_width, doc_height;
1419         gint page;
1420         gdouble zoom, top;
1421         gboolean change_top;
1422
1423         page = ev_link_dest_get_page (dest);
1424         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1425
1426         top = ev_link_dest_get_top (dest, &change_top);
1427
1428         doc_point.x = 0;
1429         doc_point.y = change_top ? top : 0;
1430
1431         zoom = zoom_for_size_fit_width (doc_width, top,
1432                                         ev_view_get_width (view),
1433                                         ev_view_get_height (view), 0);
1434
1435         ev_view_set_sizing_mode (view, EV_SIZING_FIT_WIDTH);
1436         ev_view_set_zoom (view, zoom, FALSE);
1437
1438         view->current_page = page;
1439         if (change_top)
1440                 view->pending_point = doc_point;
1441         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1442
1443         gtk_widget_queue_resize (GTK_WIDGET (view));
1444 }
1445
1446 static void
1447 goto_fit_dest (EvView *view, EvLinkDest *dest)
1448 {
1449         double zoom;
1450         gdouble doc_width, doc_height;
1451         int page;
1452
1453         page = ev_link_dest_get_page (dest);
1454         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1455
1456         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1457                                        ev_view_get_height (view), 0, 0);
1458
1459         ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
1460         ev_view_set_zoom (view, zoom, FALSE);
1461
1462         view->current_page = page;
1463         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1464
1465         gtk_widget_queue_resize (GTK_WIDGET (view));
1466 }
1467
1468 static void
1469 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1470 {
1471         EvPoint doc_point;
1472         gint page;
1473         gdouble zoom, left, top;
1474         gboolean change_zoom, change_left, change_top;
1475
1476         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1477         page = ev_link_dest_get_page (dest);
1478
1479         if (change_zoom && zoom > 1) {
1480                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1481                 ev_view_set_zoom (view, zoom, FALSE);
1482         }
1483
1484         left = ev_link_dest_get_left (dest, &change_left);
1485         top = ev_link_dest_get_top (dest, &change_top);
1486
1487         doc_point.x = change_left ? left : 0;
1488         doc_point.y = change_top ? top : 0;
1489
1490         view->current_page = page;
1491         if (change_left || change_top)
1492                 view->pending_point = doc_point;
1493         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1494
1495         gtk_widget_queue_resize (GTK_WIDGET (view));
1496 }
1497
1498 static void
1499 goto_dest (EvView *view, EvLinkDest *dest)
1500 {
1501         EvLinkDestType type;
1502         int page, n_pages, current_page;
1503
1504         page = ev_link_dest_get_page (dest);
1505         n_pages = ev_document_get_n_pages (view->document);
1506
1507         if (page < 0 || page >= n_pages)
1508                 return;
1509
1510         current_page = view->current_page;
1511
1512         type = ev_link_dest_get_dest_type (dest);
1513
1514         switch (type) {
1515                 case EV_LINK_DEST_TYPE_PAGE:
1516                         ev_page_cache_set_current_page (view->page_cache, page);
1517                         break;
1518                 case EV_LINK_DEST_TYPE_FIT:
1519                         goto_fit_dest (view, dest);
1520                         break;
1521                 case EV_LINK_DEST_TYPE_FITH:
1522                         goto_fith_dest (view, dest);
1523                         break;
1524                 case EV_LINK_DEST_TYPE_FITV:
1525                         goto_fitv_dest (view, dest);
1526                         break;
1527                 case EV_LINK_DEST_TYPE_FITR:
1528                         goto_fitr_dest (view, dest);
1529                         break;
1530                 case EV_LINK_DEST_TYPE_XYZ:
1531                         goto_xyz_dest (view, dest);
1532                         break;
1533                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1534                         ev_page_cache_set_page_label (view->page_cache, ev_link_dest_get_page_label (dest));
1535                         break;
1536                 default:
1537                         g_assert_not_reached ();
1538         }
1539
1540         if (current_page != view->current_page)
1541                 ev_page_cache_set_current_page (view->page_cache,
1542                                                 view->current_page);
1543 }
1544
1545 static void
1546 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1547 {
1548         EvLinkDestType type;
1549
1550         type = ev_link_dest_get_dest_type (dest);
1551
1552         if (type == EV_LINK_DEST_TYPE_NAMED) {
1553                 EvLinkDest  *dest2;
1554                 const gchar *named_dest;
1555
1556                 named_dest = ev_link_dest_get_named_dest (dest);
1557                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1558                                                           named_dest);
1559                 if (dest2) {
1560                         goto_dest (view, dest2);
1561                         g_object_unref (dest2);
1562                 }
1563
1564                 return;
1565         }
1566
1567         goto_dest (view, dest);
1568 }
1569
1570 void
1571 ev_view_handle_link (EvView *view, EvLink *link)
1572 {
1573         EvLinkAction    *action = NULL;
1574         EvLinkActionType type;
1575
1576         action = ev_link_get_action (link);
1577         if (!action)
1578                 return;
1579
1580         type = ev_link_action_get_action_type (action);
1581
1582         switch (type) {
1583                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1584                         EvLinkDest *dest;
1585
1586                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1587
1588                         dest = ev_link_action_get_dest (action);
1589                         ev_view_goto_dest (view, dest);
1590                 }
1591                         break;
1592                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1593                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1594                 case EV_LINK_ACTION_TYPE_LAUNCH:
1595                 case EV_LINK_ACTION_TYPE_NAMED:
1596                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1597                         break;
1598         }
1599 }
1600
1601 gchar *
1602 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1603 {
1604         EvLinkDestType type;
1605         gchar *msg = NULL;
1606
1607         type = ev_link_dest_get_dest_type (dest);
1608
1609         switch (type) {
1610                 case EV_LINK_DEST_TYPE_NAMED: {
1611                         EvLinkDest  *dest2;
1612                         const gchar *named_dest;
1613
1614                         named_dest = ev_link_dest_get_named_dest (dest);
1615                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1616                                                                   named_dest);
1617                         if (dest2) {
1618                                 msg = ev_document_get_page_label (view->document,
1619                                                                   ev_link_dest_get_page (dest2));
1620                                 g_object_unref (dest2);
1621                         }
1622                 }
1623
1624                         break;
1625                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1626                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1627                 }
1628                         break;
1629                 default:
1630                         msg = ev_document_get_page_label (view->document,
1631                                                           ev_link_dest_get_page (dest));
1632         }
1633
1634         return msg;
1635 }
1636
1637 static char *
1638 tip_from_action_named (EvLinkAction *action)
1639 {
1640         const gchar *name = ev_link_action_get_name (action);
1641
1642         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1643                 return g_strdup (_("Go to first page"));
1644         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1645                 return g_strdup (_("Go to previous page"));
1646         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1647                 return g_strdup (_("Go to next page"));
1648         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1649                 return g_strdup (_("Go to last page"));
1650         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1651                 return g_strdup (_("Go to page"));
1652         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1653                 return g_strdup (_("Find"));
1654         }
1655
1656         return NULL;
1657 }
1658
1659 static char *
1660 tip_from_link (EvView *view, EvLink *link)
1661 {
1662         EvLinkAction *action;
1663         EvLinkActionType type;
1664         char *msg = NULL;
1665         char *page_label;
1666         const char *title;
1667
1668         action = ev_link_get_action (link);
1669         title = ev_link_get_title (link);
1670
1671         if (!action)
1672                 return title ? g_strdup (title) : NULL;
1673
1674         type = ev_link_action_get_action_type (action);
1675
1676         switch (type) {
1677                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1678                         page_label = ev_view_page_label_from_dest (view,
1679                                                                    ev_link_action_get_dest (action));
1680                         if (page_label) {
1681                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1682                                 g_free (page_label);
1683                         }
1684                         break;
1685                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1686                         if (title) {
1687                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1688                                                        ev_link_action_get_filename (action));
1689                         } else {
1690                                 msg = g_strdup_printf (_("Go to file “%s”"),
1691                                                        ev_link_action_get_filename (action));
1692                         }
1693                         break;
1694                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1695                         msg = g_strdup (ev_link_action_get_uri (action));
1696                         break;
1697                 case EV_LINK_ACTION_TYPE_LAUNCH:
1698                         msg = g_strdup_printf (_("Launch %s"),
1699                                                ev_link_action_get_filename (action));
1700                         break;
1701                 case EV_LINK_ACTION_TYPE_NAMED:
1702                         msg = tip_from_action_named (action);
1703                         break;
1704                 default:
1705                         if (title)
1706                                 msg = g_strdup (title);
1707                         break;
1708         }
1709
1710         return msg;
1711 }
1712
1713 static void
1714 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1715 {
1716         EvLink       *link;
1717         EvFormField  *field;
1718         EvAnnotation *annot = NULL;
1719
1720         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1721                 return;
1722
1723         if (view->drag_info.in_drag) {
1724                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1725                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1726                 return;
1727         }
1728
1729         if (view->scroll_info.autoscrolling) {
1730                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1731                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1732                 return;
1733         }
1734
1735         link = ev_view_get_link_at_location (view, x, y);
1736         if (link) {
1737                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1738         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1739                 if (field->is_read_only) {
1740                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1741                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1742                             view->cursor == EV_VIEW_CURSOR_DRAG)
1743                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1744                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1745                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1746                 } else {
1747                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1748                 }
1749         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1750                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1751         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1752                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1753         } else {
1754                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1755                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1756                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1757                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1758                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1759         }
1760
1761         if (link || annot)
1762                 g_object_set (view, "has-tooltip", TRUE, NULL);
1763 }
1764
1765 /*** Images ***/
1766 static EvImage *
1767 ev_view_get_image_at_location (EvView  *view,
1768                                gdouble  x,
1769                                gdouble  y)
1770 {
1771         gint page = -1;
1772         gint x_new = 0, y_new = 0;
1773         GList *image_mapping;
1774
1775         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1776                 return NULL;
1777
1778         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1779                 return NULL;
1780
1781         image_mapping = ev_pixbuf_cache_get_image_mapping (view->pixbuf_cache, page);
1782
1783         if (image_mapping)
1784                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1785         else
1786                 return NULL;
1787 }
1788
1789 /*** Forms ***/
1790 static EvFormField *
1791 ev_view_get_form_field_at_location (EvView  *view,
1792                                     gdouble  x,
1793                                     gdouble  y)
1794 {
1795         gint page = -1;
1796         gint x_new = 0, y_new = 0;
1797         GList *forms_mapping;
1798
1799         if (!EV_IS_DOCUMENT_FORMS (view->document))
1800                 return NULL;
1801
1802         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1803                 return NULL;
1804
1805         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, page);
1806
1807         if (forms_mapping)
1808                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1809         else
1810                 return NULL;
1811 }
1812
1813 static GdkRegion *
1814 ev_view_form_field_get_region (EvView      *view,
1815                                EvFormField *field)
1816 {
1817         GdkRectangle view_area;
1818         GList       *forms_mapping;
1819
1820         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1821                                                                 field->page->index);
1822         ev_view_get_area_from_mapping (view, field->page->index,
1823                                        forms_mapping,
1824                                        field, &view_area);
1825
1826         return gdk_region_rectangle (&view_area);
1827 }
1828
1829 static gboolean
1830 ev_view_forms_remove_widgets (EvView *view)
1831 {
1832         ev_view_remove_all (view);
1833
1834         return FALSE;
1835 }
1836
1837 static void
1838 ev_view_form_field_destroy (GtkWidget *widget,
1839                             EvView    *view)
1840 {
1841         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1842 }
1843
1844 static GtkWidget *
1845 ev_view_form_field_button_create_widget (EvView      *view,
1846                                          EvFormField *field)
1847 {
1848         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1849         GdkRegion         *field_region = NULL;
1850
1851         switch (field_button->type) {
1852                 case EV_FORM_FIELD_BUTTON_PUSH:
1853                         return NULL;
1854                 case EV_FORM_FIELD_BUTTON_CHECK:
1855                 case EV_FORM_FIELD_BUTTON_RADIO: {
1856                         gboolean  state;
1857                         GList    *forms_mapping, *l;
1858
1859                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1860                                                                                field);
1861
1862                         /* FIXME: it actually depends on NoToggleToOff flags */
1863                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1864                             state && field_button->state)
1865                                 return NULL;
1866
1867                         field_region = ev_view_form_field_get_region (view, field);
1868
1869                         /* For radio buttons and checkbox buttons that are in a set
1870                          * we need to update also the region for the current selected item
1871                          */
1872                         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1873                                                                                 field->page->index);
1874                         for (l = forms_mapping; l; l = g_list_next (l)) {
1875                                 EvFormField *button = ((EvMapping *)(l->data))->data;
1876                                 GdkRegion   *button_region;
1877
1878                                 if (button->id == field->id)
1879                                         continue;
1880
1881                                 /* FIXME: only buttons in the same group should be updated */
1882                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1883                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1884                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1885                                         continue;
1886
1887                                 button_region = ev_view_form_field_get_region (view, button);
1888                                 gdk_region_union (field_region, button_region);
1889                                 gdk_region_destroy (button_region);
1890                         }
1891
1892                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
1893                                                                        field, !state);
1894                         field_button->state = !state;
1895                 }
1896                         break;
1897         }
1898
1899         ev_view_reload_page (view, field->page->index, field_region);
1900         gdk_region_destroy (field_region);
1901
1902         return NULL;
1903 }
1904
1905 static void
1906 ev_view_form_field_text_save (EvView    *view,
1907                               GtkWidget *widget)
1908 {
1909         EvFormField *field;
1910
1911         if (!view->document)
1912                 return;
1913
1914         field = g_object_get_data (G_OBJECT (widget), "form-field");
1915
1916         if (field->changed) {
1917                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1918                 GdkRegion       *field_region;
1919
1920                 field_region = ev_view_form_field_get_region (view, field);
1921
1922                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
1923                                                             field, field_text->text);
1924                 field->changed = FALSE;
1925                 ev_view_reload_page (view, field->page->index, field_region);
1926                 gdk_region_destroy (field_region);
1927         }
1928 }
1929
1930 static void
1931 ev_view_form_field_text_changed (GtkWidget   *widget,
1932                                  EvFormField *field)
1933 {
1934         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1935         gchar           *text = NULL;
1936
1937         if (GTK_IS_ENTRY (widget)) {
1938                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
1939         } else if (GTK_IS_TEXT_BUFFER (widget)) {
1940                 GtkTextIter start, end;
1941
1942                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
1943                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
1944                                                  &start, &end, FALSE);
1945         }
1946
1947         if (!field_text->text ||
1948             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
1949                 g_free (field_text->text);
1950                 field_text->text = text;
1951                 field->changed = TRUE;
1952         }
1953 }
1954
1955 static GtkWidget *
1956 ev_view_form_field_text_create_widget (EvView      *view,
1957                                        EvFormField *field)
1958 {
1959         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1960         GtkWidget       *text = NULL;
1961         gchar           *txt;
1962
1963         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
1964                                                           field);
1965
1966         switch (field_text->type) {
1967                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
1968                         /* TODO */
1969                 case EV_FORM_FIELD_TEXT_NORMAL:
1970                         text = gtk_entry_new ();
1971                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
1972                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
1973                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
1974
1975                         if (txt) {
1976                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
1977                                 g_free (txt);
1978                         }
1979
1980                         g_signal_connect (text, "changed",
1981                                           G_CALLBACK (ev_view_form_field_text_changed),
1982                                           field);
1983                         g_signal_connect_after (text, "activate",
1984                                                 G_CALLBACK (ev_view_form_field_destroy),
1985                                                 view);
1986                         break;
1987                 case EV_FORM_FIELD_TEXT_MULTILINE: {
1988                         GtkTextBuffer *buffer;
1989
1990                         text = gtk_text_view_new ();
1991                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
1992
1993                         if (txt) {
1994                                 gtk_text_buffer_set_text (buffer, txt, -1);
1995                                 g_free (txt);
1996                         }
1997
1998                         g_signal_connect (buffer, "changed",
1999                                           G_CALLBACK (ev_view_form_field_text_changed),
2000                                           field);
2001                 }
2002                         break;
2003         }
2004
2005         g_object_weak_ref (G_OBJECT (text),
2006                            (GWeakNotify)ev_view_form_field_text_save,
2007                            view);
2008
2009         return text;
2010 }
2011
2012 static void
2013 ev_view_form_field_choice_save (EvView    *view,
2014                                 GtkWidget *widget)
2015 {
2016         EvFormField *field;
2017
2018         if (!view->document)
2019                 return;
2020
2021         field = g_object_get_data (G_OBJECT (widget), "form-field");
2022
2023         if (field->changed) {
2024                 GList             *l;
2025                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2026                 GdkRegion         *field_region;
2027
2028                 field_region = ev_view_form_field_get_region (view, field);
2029
2030                 if (field_choice->is_editable) {
2031                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2032                                                                       field, field_choice->text);
2033                 } else {
2034                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2035                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2036                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2037                                                                                  field,
2038                                                                                  GPOINTER_TO_INT (l->data));
2039                         }
2040                 }
2041                 field->changed = FALSE;
2042                 ev_view_reload_page (view, field->page->index, field_region);
2043                 gdk_region_destroy (field_region);
2044         }
2045 }
2046
2047 static void
2048 ev_view_form_field_choice_changed (GtkWidget   *widget,
2049                                    EvFormField *field)
2050 {
2051         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2052
2053         if (GTK_IS_COMBO_BOX (widget)) {
2054                 gint item;
2055
2056                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2057                 if (!field_choice->selected_items ||
2058                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2059                         g_list_free (field_choice->selected_items);
2060                         field_choice->selected_items = NULL;
2061                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2062                                                                        GINT_TO_POINTER (item));
2063                         field->changed = TRUE;
2064                 }
2065
2066                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
2067                         gchar *text;
2068
2069                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
2070                         if (!field_choice->text ||
2071                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2072                                 g_free (field_choice->text);
2073                                 field_choice->text = text;
2074                                 field->changed = TRUE;
2075                         }
2076                 }
2077         } else if (GTK_IS_TREE_SELECTION (widget)) {
2078                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2079                 GtkTreeModel     *model;
2080                 GList            *items, *l;
2081
2082                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2083                 g_list_free (field_choice->selected_items);
2084                 field_choice->selected_items = NULL;
2085
2086                 for (l = items; l && l->data; l = g_list_next (l)) {
2087                         GtkTreeIter  iter;
2088                         GtkTreePath *path = (GtkTreePath *)l->data;
2089                         gint         item;
2090
2091                         gtk_tree_model_get_iter (model, &iter, path);
2092                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2093
2094                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2095                                                                        GINT_TO_POINTER (item));
2096
2097                         gtk_tree_path_free (path);
2098                 }
2099
2100                 g_list_free (items);
2101
2102                 field->changed = TRUE;
2103         }
2104 }
2105
2106 static GtkWidget *
2107 ev_view_form_field_choice_create_widget (EvView      *view,
2108                                          EvFormField *field)
2109 {
2110         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2111         GtkWidget         *choice;
2112         GtkTreeModel      *model;
2113         gint               n_items, i;
2114         gint               selected_item = 0;
2115
2116         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2117                                                                    field);
2118         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2119         for (i = 0; i < n_items; i++) {
2120                 GtkTreeIter iter;
2121                 gchar      *item;
2122
2123                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2124                                                                      field, i);
2125                 if (ev_document_forms_form_field_choice_is_item_selected (
2126                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2127                         selected_item = i;
2128                         /* FIXME: we need a get_selected_items function in poppler */
2129                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2130                                                                        GINT_TO_POINTER (i));
2131                 }
2132
2133                 if (item) {
2134                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2135                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2136                                             0, item,
2137                                             1, i,
2138                                             -1);
2139                         g_free (item);
2140                 }
2141         }
2142
2143         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2144                 GtkCellRenderer  *renderer;
2145                 GtkWidget        *tree_view;
2146                 GtkTreeSelection *selection;
2147
2148                 tree_view = gtk_tree_view_new_with_model (model);
2149                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2150
2151                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2152                 if (field_choice->multi_select) {
2153                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2154                 }
2155
2156                 /* TODO: set selected items */
2157
2158                 renderer = gtk_cell_renderer_text_new ();
2159                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2160                                                              0,
2161                                                              "choix", renderer,
2162                                                              "text", 0,
2163                                                              NULL);
2164
2165                 choice = gtk_scrolled_window_new (NULL, NULL);
2166                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2167                                                 GTK_POLICY_AUTOMATIC,
2168                                                 GTK_POLICY_AUTOMATIC);
2169                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2170                 gtk_widget_show (tree_view);
2171
2172                 g_signal_connect (selection, "changed",
2173                                   G_CALLBACK (ev_view_form_field_choice_changed),
2174                                   field);
2175                 g_signal_connect_after (selection, "changed",
2176                                         G_CALLBACK (ev_view_form_field_destroy),
2177                                         view);
2178         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2179                 gchar *text;
2180
2181                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2182                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2183                 if (text) {
2184                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2185                         g_free (text);
2186                 }
2187
2188                 g_signal_connect (choice, "changed",
2189                                   G_CALLBACK (ev_view_form_field_choice_changed),
2190                                   field);
2191                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
2192                                         G_CALLBACK (ev_view_form_field_destroy),
2193                                         view);
2194         } else { /* ComboBoxText */
2195                 GtkCellRenderer *renderer;
2196
2197                 choice = gtk_combo_box_new_with_model (model);
2198                 renderer = gtk_cell_renderer_text_new ();
2199                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2200                                             renderer, TRUE);
2201                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2202                                                 renderer,
2203                                                 "text", 0,
2204                                                 NULL);
2205                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2206                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2207
2208                 g_signal_connect (choice, "changed",
2209                                   G_CALLBACK (ev_view_form_field_choice_changed),
2210                                   field);
2211                 g_signal_connect_after (choice, "changed",
2212                                         G_CALLBACK (ev_view_form_field_destroy),
2213                                         view);
2214         }
2215
2216         g_object_unref (model);
2217
2218         g_object_weak_ref (G_OBJECT (choice),
2219                            (GWeakNotify)ev_view_form_field_choice_save,
2220                            view);
2221
2222         return choice;
2223 }
2224
2225 static void
2226 ev_view_handle_form_field (EvView      *view,
2227                            EvFormField *field,
2228                            gdouble      x,
2229                            gdouble      y)
2230 {
2231         GtkWidget   *field_widget = NULL;
2232         GList       *form_field_mapping;
2233         GdkRectangle view_area;
2234
2235         if (field->is_read_only)
2236                 return;
2237
2238         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2239                 field_widget = ev_view_form_field_button_create_widget (view, field);
2240         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2241                 field_widget = ev_view_form_field_text_create_widget (view, field);
2242         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2243                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2244         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2245                 /* TODO */
2246         }
2247
2248         /* Form field doesn't require a widget */
2249         if (!field_widget)
2250                 return;
2251
2252         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2253                                 g_object_ref (field),
2254                                 (GDestroyNotify)g_object_unref);
2255
2256         form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, field->page->index);
2257         ev_view_get_area_from_mapping (view, field->page->index,
2258                                        form_field_mapping,
2259                                        field, &view_area);
2260
2261         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2262         gtk_widget_show (field_widget);
2263         gtk_widget_grab_focus (field_widget);
2264 }
2265
2266 /* Annotations */
2267 static EvViewWindowChild *
2268 ev_view_get_window_child (EvView    *view,
2269                           GtkWidget *window)
2270 {
2271         GList *children = view->window_children;
2272
2273         while (children) {
2274                 EvViewWindowChild *child;
2275
2276                 child = (EvViewWindowChild *)children->data;
2277                 children = children->next;
2278
2279                 if (child->window == window)
2280                         return child;
2281         }
2282
2283         return NULL;
2284 }
2285
2286 static void
2287 ev_view_window_child_move (EvView            *view,
2288                            EvViewWindowChild *child,
2289                            gint               x,
2290                            gint               y)
2291 {
2292         child->x = x;
2293         child->y = y;
2294         gtk_window_move (GTK_WINDOW (child->window),
2295                          MAX (child->parent_x, x),
2296                          MAX (child->parent_y, y));
2297 }
2298
2299 static void
2300 ev_view_window_child_move_with_parent (EvView    *view,
2301                                        GtkWidget *window)
2302 {
2303         EvViewWindowChild *child;
2304         gint               root_x, root_y;
2305
2306         child = ev_view_get_window_child (view, window);
2307         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2308                                &root_x, &root_y);
2309         if (root_x != child->parent_x || root_y != child->parent_y) {
2310                 gint dest_x, dest_y;
2311
2312                 dest_x = child->x + (root_x - child->parent_x);
2313                 dest_y = child->y + (root_y - child->parent_y);
2314                 child->parent_x = root_x;
2315                 child->parent_y = root_y;
2316                 ev_view_window_child_move (view, child, dest_x, dest_y);
2317         }
2318
2319         if (child->visible && !GTK_WIDGET_VISIBLE (window))
2320                 gtk_widget_show (window);
2321 }
2322
2323 static void
2324 ev_view_window_child_put (EvView    *view,
2325                           GtkWidget *window,
2326                           guint      page,
2327                           gint       x,
2328                           gint       y,
2329                           gdouble    orig_x,
2330                           gdouble    orig_y)
2331 {
2332         EvViewWindowChild *child;
2333         gint               root_x, root_y;
2334
2335         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2336                                &root_x, &root_y);
2337
2338         child = g_new0 (EvViewWindowChild, 1);
2339         child->window = window;
2340         child->page = page;
2341         child->orig_x = orig_x;
2342         child->orig_y = orig_y;
2343         child->parent_x = root_x;
2344         child->parent_y = root_y;
2345         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2346         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2347
2348         if (child->visible)
2349                 gtk_widget_show (window);
2350         else
2351                 gtk_widget_hide (window);
2352
2353         view->window_children = g_list_append (view->window_children, child);
2354 }
2355
2356 static EvViewWindowChild *
2357 ev_view_find_window_child_for_annot (EvView       *view,
2358                                      guint         page,
2359                                      EvAnnotation *annot)
2360 {
2361         GList *children = view->window_children;
2362
2363         while (children) {
2364                 EvViewWindowChild *child;
2365                 EvAnnotation      *wannot;
2366
2367                 child = (EvViewWindowChild *)children->data;
2368                 children = children->next;
2369
2370                 if (child->page != page)
2371                         continue;
2372
2373                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2374                 if (wannot == annot || strcmp (wannot->name, annot->name) == 0)
2375                         return child;
2376         }
2377
2378         return NULL;
2379 }
2380
2381 static void
2382 ev_view_window_children_free (EvView *view)
2383 {
2384         GList *l;
2385
2386         if (!view->window_children)
2387                 return;
2388
2389         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2390                 EvViewWindowChild *child;
2391
2392                 child = (EvViewWindowChild *)l->data;
2393                 gtk_widget_destroy (GTK_WIDGET (child->window));
2394                 g_free (child);
2395         }
2396         g_list_free (view->window_children);
2397         view->window_children = NULL;
2398         view->window_child_focus = NULL;
2399 }
2400
2401 static void
2402 annotation_window_grab_focus (GtkWidget *widget,
2403                               EvView    *view)
2404 {
2405         if (view->window_child_focus)
2406                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2407         view->window_child_focus = ev_view_get_window_child (view, widget);
2408 }
2409
2410 static void
2411 annotation_window_closed (EvAnnotationWindow *window,
2412                           EvView             *view)
2413 {
2414         EvViewWindowChild *child;
2415
2416         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2417         child->visible = FALSE;
2418 }
2419
2420 static void
2421 annotation_window_moved (EvAnnotationWindow *window,
2422                          gint                x,
2423                          gint                y,
2424                          EvView             *view)
2425 {
2426         EvViewWindowChild *child;
2427         GdkRectangle       page_area;
2428         GtkBorder          border;
2429         GdkRectangle       view_rect;
2430         EvRectangle        doc_rect;
2431         gint               width, height;
2432
2433         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2434         if (child->x == x && child->y == y)
2435                 return;
2436
2437         child->moved = TRUE;
2438         child->x = x;
2439         child->y = y;
2440
2441         /* Window has been moved by the user,
2442          * we have to set a new origin in doc coords
2443          */
2444         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2445         view_rect.x = (x - child->parent_x) + view->scroll_x;
2446         view_rect.y = (y - child->parent_y) + view->scroll_y;
2447         view_rect.width = width;
2448         view_rect.height = height;
2449
2450         get_page_extents (view, child->page, &page_area, &border);
2451         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2452         child->orig_x = doc_rect.x1;
2453         child->orig_y = doc_rect.y1;
2454 }
2455
2456 static void
2457 ev_view_annotation_save (EvView       *view,
2458                          EvAnnotation *annot)
2459 {
2460         if (!view->document)
2461                 return;
2462
2463         if (!annot->changed)
2464                 return;
2465
2466         ev_document_annotations_annotation_set_contents (EV_DOCUMENT_ANNOTATIONS (view->document),
2467                                                          annot, annot->contents);
2468         annot->changed = FALSE;
2469 }
2470
2471 static void
2472 show_annotation_windows (EvView *view,
2473                          gint    page)
2474 {
2475         GList     *annots, *l;
2476         GtkWindow *parent;
2477
2478         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2479
2480         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2481
2482         for (l = annots; l && l->data; l = g_list_next (l)) {
2483                 EvAnnotation      *annot;
2484                 EvViewWindowChild *child;
2485                 GtkWidget         *window;
2486                 EvRectangle       *doc_rect;
2487                 GdkRectangle       view_rect;
2488
2489                 annot = ((EvMapping *)(l->data))->data;
2490
2491                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2492                         continue;
2493
2494                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2495                         continue;
2496
2497                 window = g_object_get_data (G_OBJECT (annot), "popup");
2498                 if (window) {
2499                         ev_view_window_child_move_with_parent (view, window);
2500                         continue;
2501                 }
2502
2503                 /* Look if we already have a popup for this annot */
2504                 child = ev_view_find_window_child_for_annot (view, page, annot);
2505                 window = child ? child->window : NULL;
2506                 if (window) {
2507                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2508                         g_object_set_data (G_OBJECT (annot), "popup", window);
2509                         ev_view_window_child_move_with_parent (view, window);
2510                 } else {
2511                         window = ev_annotation_window_new (annot, parent);
2512                         g_signal_connect (window, "grab_focus",
2513                                           G_CALLBACK (annotation_window_grab_focus),
2514                                           view);
2515                         g_signal_connect (window, "closed",
2516                                           G_CALLBACK (annotation_window_closed),
2517                                           view);
2518                         g_signal_connect (window, "moved",
2519                                           G_CALLBACK (annotation_window_moved),
2520                                           view);
2521                         g_object_set_data (G_OBJECT (annot), "popup", window);
2522
2523                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2524                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2525                         view_rect.x -= view->scroll_x;
2526                         view_rect.y -= view->scroll_y;
2527
2528                         ev_view_window_child_put (view, window, page,
2529                                                   view_rect.x, view_rect.y,
2530                                                   doc_rect->x1, doc_rect->y1);
2531
2532                         g_object_weak_ref (G_OBJECT (annot),
2533                                            (GWeakNotify)ev_view_annotation_save,
2534                                            view);
2535                 }
2536         }
2537 }
2538
2539 static void
2540 hide_annotation_windows (EvView *view,
2541                          gint    page)
2542 {
2543         GList *annots, *l;
2544
2545         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2546
2547         for (l = annots; l && l->data; l = g_list_next (l)) {
2548                 EvAnnotation *annot;
2549                 GtkWidget    *window;
2550
2551                 annot = ((EvMapping *)(l->data))->data;
2552
2553                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2554                         continue;
2555
2556                 window = g_object_get_data (G_OBJECT (annot), "popup");
2557                 if (window)
2558                         gtk_widget_hide (window);
2559         }
2560 }
2561
2562 static EvAnnotation *
2563 ev_view_get_annotation_at_location (EvView  *view,
2564                                     gdouble  x,
2565                                     gdouble  y)
2566 {
2567         gint page = -1;
2568         gint x_new = 0, y_new = 0;
2569         GList *annotations_mapping;
2570
2571         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2572                 return NULL;
2573
2574         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2575                 return NULL;
2576
2577         annotations_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2578
2579         if (annotations_mapping)
2580                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2581         else
2582                 return NULL;
2583 }
2584
2585 static void
2586 ev_view_handle_annotation (EvView       *view,
2587                            EvAnnotation *annot,
2588                            gdouble       x,
2589                            gdouble       y)
2590 {
2591         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2592                 GtkWidget *window;
2593
2594                 window = g_object_get_data (G_OBJECT (annot), "popup");
2595                 if (window) {
2596                         EvViewWindowChild *child;
2597
2598                         child = ev_view_get_window_child (view, window);
2599                         if (!child->visible) {
2600                                 child->visible = TRUE;
2601                                 ev_view_window_child_move (view, child, child->x, child->y);
2602                                 gtk_widget_show (window);
2603                         }
2604                 }
2605         }
2606 }
2607
2608 /*** GtkWidget implementation ***/
2609
2610 static void
2611 ev_view_size_request_continuous_dual_page (EvView         *view,
2612                                            GtkRequisition *requisition)
2613 {
2614         int max_width;
2615         gint n_pages;
2616         GtkBorder border;
2617
2618         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2619                                      view->scale, &max_width);
2620         compute_border (view, max_width, max_width, &border);
2621
2622         n_pages = ev_document_get_n_pages (view->document) + 1;
2623
2624         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2625         get_page_y_offset (view, n_pages, &requisition->height);
2626
2627         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2628                 requisition->width = 1;
2629         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2630                 requisition->width = 1;
2631                 /* FIXME: This could actually be set on one page docs or docs
2632                  * with a strange aspect ratio. */
2633                 /* requisition->height = 1;*/
2634         }
2635 }
2636
2637 static void
2638 ev_view_size_request_continuous (EvView         *view,
2639                                  GtkRequisition *requisition)
2640 {
2641         int max_width;
2642         int n_pages;
2643         GtkBorder border;
2644
2645
2646         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2647                                      view->scale, &max_width);
2648         n_pages = ev_document_get_n_pages (view->document);
2649         compute_border (view, max_width, max_width, &border);
2650
2651         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2652         get_page_y_offset (view, n_pages, &requisition->height);
2653
2654         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2655                 requisition->width = 1;
2656         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2657                 requisition->width = 1;
2658                 /* FIXME: This could actually be set on one page docs or docs
2659                  * with a strange aspect ratio. */
2660                 /* requisition->height = 1;*/
2661         }
2662 }
2663
2664 static void
2665 ev_view_size_request_dual_page (EvView         *view,
2666                                 GtkRequisition *requisition)
2667 {
2668         GtkBorder border;
2669         gint width, height;
2670
2671         /* Find the largest of the two. */
2672         ev_page_cache_get_size (view->page_cache,
2673                                 view->current_page,
2674                                 view->rotation,
2675                                 view->scale,
2676                                 &width, &height);
2677         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
2678                 gint width_2, height_2;
2679                 ev_page_cache_get_size (view->page_cache,
2680                                         view->current_page + 1,
2681                                         view->rotation,
2682                                         view->scale,
2683                                         &width_2, &height_2);
2684                 if (width_2 > width) {
2685                         width = width_2;
2686                         height = height_2;
2687                 }
2688         }
2689         compute_border (view, width, height, &border);
2690
2691         requisition->width = ((width + border.left + border.right) * 2) +
2692                 (view->spacing * 3);
2693         requisition->height = (height + border.top + border.bottom) +
2694                 (view->spacing * 2);
2695
2696         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2697                 requisition->width = 1;
2698         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2699                 requisition->width = 1;
2700                 requisition->height = 1;
2701         }
2702 }
2703
2704 static void
2705 ev_view_size_request_single_page (EvView         *view,
2706                                   GtkRequisition *requisition)
2707 {
2708         GtkBorder border;
2709         gint width, height;
2710
2711         ev_page_cache_get_size (view->page_cache,
2712                                 view->current_page,
2713                                 view->rotation,
2714                                 view->scale,
2715                                 &width, &height);
2716         compute_border (view, width, height, &border);
2717
2718         requisition->width = width + border.left + border.right + (2 * view->spacing);
2719         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2720
2721         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2722                 requisition->width = 1;
2723                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2724         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2725                 requisition->width = 1;
2726                 requisition->height = 1;
2727         }
2728 }
2729
2730 static void
2731 ev_view_size_request (GtkWidget      *widget,
2732                       GtkRequisition *requisition)
2733 {
2734         EvView *view = EV_VIEW (widget);
2735
2736         if (view->document == NULL) {
2737                 requisition->width = 1;
2738                 requisition->height = 1;
2739                 return;
2740         }
2741
2742         if (view->presentation) {
2743                 requisition->width = 1;
2744                 requisition->height = 1;
2745                 return;
2746         }
2747
2748         if (view->continuous && view->dual_page)
2749                 ev_view_size_request_continuous_dual_page (view, requisition);
2750         else if (view->continuous)
2751                 ev_view_size_request_continuous (view, requisition);
2752         else if (view->dual_page)
2753                 ev_view_size_request_dual_page (view, requisition);
2754         else
2755                 ev_view_size_request_single_page (view, requisition);
2756 }
2757
2758 static void
2759 ev_view_size_allocate (GtkWidget      *widget,
2760                        GtkAllocation  *allocation)
2761 {
2762         EvView *view = EV_VIEW (widget);
2763         GList  *children, *l;
2764         gint    root_x, root_y;
2765
2766         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2767
2768         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2769             view->sizing_mode == EV_SIZING_BEST_FIT) {
2770                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
2771                 ev_view_size_request (widget, &widget->requisition);
2772         }
2773
2774         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2775         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2776
2777         if (view->document)
2778                 view_update_range_and_current_page (view);
2779
2780         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2781         view->pending_resize = FALSE;
2782
2783         children = gtk_container_get_children (GTK_CONTAINER (widget));
2784         for (l = children; l && l->data; l = g_list_next (l)) {
2785                 EvFormField   *field;
2786                 GdkRectangle   view_area;
2787                 GList         *form_field_mapping;
2788                 GtkAllocation  child_allocation;
2789                 GtkRequisition child_requisition;
2790                 GtkWidget     *child = (GtkWidget *)l->data;
2791
2792                 field = g_object_get_data (G_OBJECT (child), "form-field");
2793                 if (!field)
2794                         continue;
2795
2796                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2797                                                                              field->page->index);
2798                 ev_view_get_area_from_mapping (view, field->page->index,
2799                                                form_field_mapping,
2800                                                field, &view_area);
2801
2802                 gtk_widget_size_request (child, &child_requisition);
2803                 if (child_requisition.width != view_area.width ||
2804                     child_requisition.height != view_area.height)
2805                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2806
2807                 gtk_container_child_get (GTK_CONTAINER (widget),
2808                                          child,
2809                                          "x", &child_allocation.x,
2810                                          "y", &child_allocation.y,
2811                                          NULL);
2812                 if (child_allocation.x != view_area.x ||
2813                     child_allocation.y != view_area.y) {
2814                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2815                 }
2816         }
2817         g_list_free (children);
2818
2819         if (view->window_children)
2820                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2821                                        &root_x, &root_y);
2822
2823         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2824                 EvViewWindowChild *child;
2825                 EvRectangle        doc_rect;
2826                 GdkRectangle       view_rect;
2827
2828                 child = (EvViewWindowChild *)l->data;
2829
2830                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
2831                 if (child->moved) {
2832                         doc_rect.x1 = child->orig_x;
2833                         doc_rect.y1 = child->orig_y;
2834                 }
2835                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
2836                 view_rect.x -= view->scroll_x;
2837                 view_rect.y -= view->scroll_y;
2838
2839                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
2840                         child->parent_x = root_x;
2841                         child->parent_y = root_y;
2842                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
2843                 }
2844         }
2845 }
2846
2847 static void
2848 ev_view_realize (GtkWidget *widget)
2849 {
2850         EvView *view = EV_VIEW (widget);
2851
2852         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
2853                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
2854
2855         gdk_window_set_events (view->layout.bin_window,
2856                                (gdk_window_get_events (view->layout.bin_window) |
2857                                 GDK_EXPOSURE_MASK |
2858                                 GDK_BUTTON_PRESS_MASK |
2859                                 GDK_BUTTON_RELEASE_MASK |
2860                                 GDK_SCROLL_MASK |
2861                                 GDK_KEY_PRESS_MASK |
2862                                 GDK_POINTER_MOTION_MASK |
2863                                 GDK_POINTER_MOTION_HINT_MASK |
2864                                 GDK_ENTER_NOTIFY_MASK |
2865                                 GDK_LEAVE_NOTIFY_MASK));
2866
2867         if (view->presentation)
2868                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
2869         else
2870                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
2871 }
2872
2873 static gboolean
2874 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
2875 {
2876         EvView *view = EV_VIEW (widget);
2877         guint state;
2878
2879         state = event->state & gtk_accelerator_get_default_mod_mask ();
2880
2881         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
2882                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
2883
2884                 if (event->direction == GDK_SCROLL_UP ||
2885                     event->direction == GDK_SCROLL_LEFT) {
2886                         if (ev_view_can_zoom_in (view)) {
2887                                 ev_view_zoom_in (view);
2888                         }
2889                 } else {
2890                         if (ev_view_can_zoom_out (view)) {
2891                                 ev_view_zoom_out (view);
2892                         }
2893                 }
2894
2895                 return TRUE;
2896         }
2897
2898         view->jump_to_find_result = FALSE;
2899
2900         /* Shift+Wheel scrolls the in the perpendicular direction */
2901         if (state & GDK_SHIFT_MASK) {
2902                 if (event->direction == GDK_SCROLL_UP)
2903                         event->direction = GDK_SCROLL_LEFT;
2904                 else if (event->direction == GDK_SCROLL_LEFT)
2905                         event->direction = GDK_SCROLL_UP;
2906                 else if (event->direction == GDK_SCROLL_DOWN)
2907                         event->direction = GDK_SCROLL_RIGHT;
2908                 else if (event->direction == GDK_SCROLL_RIGHT)
2909                         event->direction = GDK_SCROLL_DOWN;
2910
2911                 event->state &= ~GDK_SHIFT_MASK;
2912                 state &= ~GDK_SHIFT_MASK;
2913         }
2914
2915         if (state == 0 &&
2916             (view->presentation ||
2917              (view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous))) {
2918                 switch (event->direction) {
2919                         case GDK_SCROLL_DOWN:
2920                         case GDK_SCROLL_RIGHT:
2921                                 ev_view_next_page (view);
2922                                 break;
2923                         case GDK_SCROLL_UP:
2924                         case GDK_SCROLL_LEFT:
2925                                 ev_view_previous_page (view);
2926                                 break;
2927                 }
2928
2929                 return TRUE;
2930         }
2931
2932         return FALSE;
2933 }
2934
2935 static EvViewSelection *
2936 find_selection_for_page (EvView *view,
2937                          gint    page)
2938 {
2939         GList *list;
2940
2941         for (list = view->selection_info.selections; list != NULL; list = list->next) {
2942                 EvViewSelection *selection;
2943
2944                 selection = (EvViewSelection *) list->data;
2945
2946                 if (selection->page == page)
2947                         return selection;
2948         }
2949
2950         return NULL;
2951 }
2952
2953 static void
2954 draw_end_presentation_page (EvView       *view,
2955                             GdkRectangle *page_area)
2956 {
2957         PangoLayout *layout;
2958         PangoFontDescription *font_desc;
2959         gchar *markup;
2960         const gchar *text = _("End of presentation. Press Escape to exit.");
2961
2962         if (view->presentation_state != EV_PRESENTATION_END)
2963                 return;
2964
2965         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
2966         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
2967         pango_layout_set_markup (layout, markup, -1);
2968         g_free (markup);
2969
2970         font_desc = pango_font_description_new ();
2971         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
2972         pango_layout_set_font_description (layout, font_desc);
2973
2974         gtk_paint_layout (GTK_WIDGET (view)->style,
2975                           view->layout.bin_window,
2976                           GTK_WIDGET_STATE (view),
2977                           FALSE,
2978                           page_area,
2979                           GTK_WIDGET (view),
2980                           NULL,
2981                           page_area->x + 15,
2982                           page_area->y + 15,
2983                           layout);
2984
2985         pango_font_description_free (font_desc);
2986         g_object_unref (layout);
2987 }
2988
2989 static gboolean
2990 ev_view_expose_event (GtkWidget      *widget,
2991                       GdkEventExpose *event)
2992 {
2993         EvView  *view = EV_VIEW (widget);
2994         cairo_t *cr;
2995         gint     i;
2996
2997         if (view->animation) {
2998                 if (ev_transition_animation_ready (view->animation)) {
2999                         GdkRectangle page_area;
3000                         GtkBorder    border;
3001
3002                         if (get_page_extents (view, view->current_page, &page_area, &border)) {
3003                                 cr = gdk_cairo_create (view->layout.bin_window);
3004
3005                                 /* normalize to x=0, y=0 */
3006                                 cairo_translate (cr, page_area.x, page_area.y);
3007                                 page_area.x = page_area.y = 0;
3008
3009                                 ev_transition_animation_paint (view->animation, cr, page_area);
3010                                 cairo_destroy (cr);
3011                         }
3012                 }
3013
3014                 return TRUE;
3015         }
3016
3017         if (view->presentation) {
3018                 switch (view->presentation_state) {
3019                         case EV_PRESENTATION_END: {
3020                                 GdkRectangle area = {0};
3021
3022                                 area.width = widget->allocation.width;
3023                                 area.height = widget->allocation.height;
3024
3025                                 draw_end_presentation_page (view, &area);
3026                         }
3027                                 return FALSE;
3028                         case EV_PRESENTATION_BLACK:
3029                         case EV_PRESENTATION_WHITE:
3030                                 return FALSE;
3031                         case EV_PRESENTATION_NORMAL:
3032                         default:
3033                                 break;
3034                 }
3035         } else if (view->loading) {
3036                 GdkRectangle area = {0};
3037
3038                 area.width = widget->allocation.width;
3039                 area.height = widget->allocation.height;
3040
3041                 draw_loading_text (view,
3042                                    &area,
3043                                    &(event->area));
3044         }
3045
3046         if (view->document == NULL)
3047                 return FALSE;
3048
3049         cr = gdk_cairo_create (view->layout.bin_window);
3050
3051         for (i = view->start_page; i <= view->end_page; i++) {
3052                 GdkRectangle page_area;
3053                 GtkBorder border;
3054                 gboolean page_ready = TRUE;
3055
3056                 if (!get_page_extents (view, i, &page_area, &border))
3057                         continue;
3058
3059                 page_area.x -= view->scroll_x;
3060                 page_area.y -= view->scroll_y;
3061
3062                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
3063
3064                 if (page_ready && view->find_pages && view->highlight_find_results)
3065                         highlight_find_results (view, i);
3066                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3067                         show_annotation_windows (view, i);
3068         }
3069
3070         cairo_destroy (cr);
3071
3072         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3073                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3074
3075         return FALSE;
3076 }
3077
3078 static gboolean
3079 ev_view_do_popup_menu (EvView *view,
3080                        gdouble x,
3081                        gdouble y)
3082 {
3083         EvLink  *link;
3084         EvImage *image;
3085
3086         image = ev_view_get_image_at_location (view, x, y);
3087         if (image) {
3088                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
3089                 return TRUE;
3090         }
3091
3092         link = ev_view_get_link_at_location (view, x, y);
3093         if (link) {
3094                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
3095                 return TRUE;
3096         }
3097
3098         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
3099
3100         return TRUE;
3101 }
3102
3103 static gboolean
3104 ev_view_popup_menu (GtkWidget *widget)
3105 {
3106         gint x, y;
3107
3108         gtk_widget_get_pointer (widget, &x, &y);
3109         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3110 }
3111
3112 static void
3113 get_link_area (EvView       *view,
3114                gint          x,
3115                gint          y,
3116                EvLink       *link,
3117                GdkRectangle *area)
3118 {
3119         GList *link_mapping;
3120         gint   page;
3121         gint   x_offset = 0, y_offset = 0;
3122
3123         x += view->scroll_x;
3124         y += view->scroll_y;
3125
3126         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3127
3128         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
3129         ev_view_get_area_from_mapping (view, page,
3130                                        link_mapping,
3131                                        link, area);
3132 }
3133
3134 static void
3135 get_annot_area (EvView       *view,
3136                gint          x,
3137                gint          y,
3138                EvAnnotation *annot,
3139                GdkRectangle *area)
3140 {
3141         GList *annots_mapping;
3142         gint   page;
3143         gint   x_offset = 0, y_offset = 0;
3144
3145         x += view->scroll_x;
3146         y += view->scroll_y;
3147
3148         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3149
3150         annots_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
3151         ev_view_get_area_from_mapping (view, page,
3152                                        annots_mapping,
3153                                        annot, area);
3154 }
3155
3156 static gboolean
3157 ev_view_query_tooltip (GtkWidget  *widget,
3158                        gint        x,
3159                        gint        y,
3160                        gboolean    keyboard_tip,
3161                        GtkTooltip *tooltip)
3162 {
3163         EvView       *view = EV_VIEW (widget);
3164         EvLink       *link;
3165         EvAnnotation *annot;
3166         gchar        *text;
3167
3168         annot = ev_view_get_annotation_at_location (view, x, y);
3169         if (annot && annot->contents) {
3170                 GdkRectangle annot_area;
3171
3172                 get_annot_area (view, x, y, annot, &annot_area);
3173                 gtk_tooltip_set_text (tooltip, annot->contents);
3174                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
3175
3176                 return TRUE;
3177         }
3178
3179         link = ev_view_get_link_at_location (view, x, y);
3180         if (!link)
3181                 return FALSE;
3182
3183         text = tip_from_link (view, link);
3184         if (text && g_utf8_validate (text, -1, NULL)) {
3185                 GdkRectangle link_area;
3186
3187                 get_link_area (view, x, y, link, &link_area);
3188                 gtk_tooltip_set_text (tooltip, text);
3189                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3190         }
3191         g_free (text);
3192
3193         return TRUE;
3194 }
3195
3196 static void
3197 start_selection_for_event (EvView         *view,
3198                            GdkEventButton *event)
3199 {
3200         clear_selection (view);
3201
3202         view->selection_info.start.x = event->x + view->scroll_x;
3203         view->selection_info.start.y = event->y + view->scroll_y;
3204
3205         switch (event->type) {
3206                 case GDK_2BUTTON_PRESS:
3207                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3208                         break;
3209                 case GDK_3BUTTON_PRESS:
3210                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3211                         break;
3212                 default:
3213                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3214                         return;
3215         }
3216
3217         /* In case of WORD or LINE, compute selections now */
3218         compute_selections (view,
3219                             view->selection_info.style,
3220                             &(view->selection_info.start),
3221                             &(view->selection_info.start));
3222 }
3223
3224 static gboolean
3225 ev_view_button_press_event (GtkWidget      *widget,
3226                             GdkEventButton *event)
3227 {
3228         EvView *view = EV_VIEW (widget);
3229
3230         if (!view->document)
3231                 return FALSE;
3232
3233         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3234                 gtk_widget_grab_focus (widget);
3235         }
3236
3237         if (view->window_child_focus) {
3238                 EvAnnotationWindow *window;
3239                 EvAnnotation       *annot;
3240
3241                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3242                 annot = ev_annotation_window_get_annotation (window);
3243                 ev_annotation_window_ungrab_focus (window);
3244                 ev_view_annotation_save (view, annot);
3245                 view->window_child_focus = NULL;
3246         }
3247
3248         view->pressed_button = event->button;
3249         view->selection_info.in_drag = FALSE;
3250
3251         if (view->scroll_info.autoscrolling)
3252                 return TRUE;
3253
3254         switch (event->button) {
3255                 case 1: {
3256                         EvImage *image;
3257                         EvAnnotation *annot;
3258                         EvFormField *field;
3259
3260                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3261                                 if (event->type == GDK_3BUTTON_PRESS) {
3262                                         start_selection_for_event (view, event);
3263                                 } else if (location_in_selected_text (view,
3264                                                                event->x + view->scroll_x,
3265                                                                event->y + view->scroll_y)) {
3266                                         view->selection_info.in_drag = TRUE;
3267                                 } else {
3268                                         start_selection_for_event (view, event);
3269                                 }
3270
3271                                 gtk_widget_queue_draw (widget);
3272                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3273                                 ev_view_handle_annotation (view, annot, event->x, event->y);
3274                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3275                                 ev_view_remove_all (view);
3276                                 ev_view_handle_form_field (view, field, event->x, event->y);
3277                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3278                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3279                                 if (view->image_dnd_info.image)
3280                                         g_object_unref (view->image_dnd_info.image);
3281                                 view->image_dnd_info.image = g_object_ref (image);
3282                                 view->image_dnd_info.in_drag = TRUE;
3283
3284                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3285                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3286                         } else {
3287                                 ev_view_remove_all (view);
3288
3289                                 if (EV_IS_SELECTION (view->document))
3290                                         start_selection_for_event (view, event);
3291                         }
3292                 }
3293                         return TRUE;
3294                 case 2:
3295                         /* use root coordinates as reference point because
3296                          * scrolling changes window relative coordinates */
3297                         view->drag_info.start.x = event->x_root;
3298                         view->drag_info.start.y = event->y_root;
3299                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3300                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3301
3302                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3303
3304                         return TRUE;
3305                 case 3:
3306                         view->scroll_info.start_y = event->y;
3307                         return ev_view_do_popup_menu (view, event->x, event->y);
3308         }
3309
3310         return FALSE;
3311 }
3312
3313 static void
3314 ev_view_remove_all (EvView *view)
3315 {
3316         GList *children, *child;
3317
3318         children = gtk_container_get_children (GTK_CONTAINER (view));
3319         for (child = children; child && child->data; child = g_list_next (child)) {
3320                 gtk_container_remove (GTK_CONTAINER (view),
3321                                       GTK_WIDGET (child->data));
3322         }
3323         g_list_free (children);
3324 }
3325
3326 /*** Drag and Drop ***/
3327 static void
3328 ev_view_drag_data_get (GtkWidget        *widget,
3329                        GdkDragContext   *context,
3330                        GtkSelectionData *selection_data,
3331                        guint             info,
3332                        guint             time)
3333 {
3334         EvView *view = EV_VIEW (widget);
3335
3336         switch (info) {
3337                 case TARGET_DND_TEXT:
3338                         if (EV_IS_SELECTION (view->document) &&
3339                             view->selection_info.selections) {
3340                                 gchar *text;
3341
3342                                 text = get_selected_text (view);
3343                                 gtk_selection_data_set_text (selection_data,
3344                                                              text,
3345                                                              strlen (text));
3346                                 g_free (text);
3347                         }
3348                         break;
3349                 case TARGET_DND_IMAGE:
3350                         if (view->image_dnd_info.image) {
3351                                 GdkPixbuf *pixbuf;
3352
3353                                 ev_document_doc_mutex_lock ();
3354                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3355                                                                        view->image_dnd_info.image);
3356                                 ev_document_doc_mutex_unlock ();
3357
3358                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3359                                 g_object_unref (pixbuf);
3360                         }
3361                         break;
3362                 case TARGET_DND_URI:
3363                         if (view->image_dnd_info.image) {
3364                                 GdkPixbuf   *pixbuf;
3365                                 const gchar *tmp_uri;
3366                                 gchar       *uris[2];
3367
3368                                 ev_document_doc_mutex_lock ();
3369                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3370                                                                        view->image_dnd_info.image);
3371                                 ev_document_doc_mutex_unlock ();
3372
3373                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3374                                 g_object_unref (pixbuf);
3375
3376                                 uris[0] = (gchar *)tmp_uri;
3377                                 uris[1] = NULL;
3378                                 gtk_selection_data_set_uris (selection_data, uris);
3379                         }
3380         }
3381 }
3382
3383 static gboolean
3384 ev_view_drag_motion (GtkWidget      *widget,
3385                      GdkDragContext *context,
3386                      gint            x,
3387                      gint            y,
3388                      guint           time)
3389 {
3390         if (gtk_drag_get_source_widget (context) == widget)
3391                 gdk_drag_status (context, 0, time);
3392         else
3393                 gdk_drag_status (context, context->suggested_action, time);
3394
3395         return TRUE;
3396 }
3397
3398 static gboolean
3399 selection_update_idle_cb (EvView *view)
3400 {
3401         compute_selections (view,
3402                             view->selection_info.style,
3403                             &view->selection_info.start,
3404                             &view->motion);
3405         view->selection_update_id = 0;
3406         return FALSE;
3407 }
3408
3409 static gboolean
3410 selection_scroll_timeout_cb (EvView *view)
3411 {
3412         gint x, y, shift = 0;
3413         GtkWidget *widget = GTK_WIDGET (view);
3414
3415         gtk_widget_get_pointer (widget, &x, &y);
3416
3417         if (y > widget->allocation.height) {
3418                 shift = (y - widget->allocation.height) / 2;
3419         } else if (y < 0) {
3420                 shift = y / 2;
3421         }
3422
3423         if (shift)
3424                 gtk_adjustment_set_value (view->vadjustment,
3425                                           CLAMP (view->vadjustment->value + shift,
3426                                           view->vadjustment->lower,
3427                                           view->vadjustment->upper -
3428                                           view->vadjustment->page_size));
3429
3430         if (x > widget->allocation.width) {
3431                 shift = (x - widget->allocation.width) / 2;
3432         } else if (x < 0) {
3433                 shift = x / 2;
3434         }
3435
3436         if (shift)
3437                 gtk_adjustment_set_value (view->hadjustment,
3438                                           CLAMP (view->hadjustment->value + shift,
3439                                           view->hadjustment->lower,
3440                                           view->hadjustment->upper -
3441                                           view->hadjustment->page_size));
3442
3443         return TRUE;
3444 }
3445
3446 static gboolean
3447 ev_view_drag_update_momentum (EvView *view)
3448 {
3449         int i;
3450         if (!view->drag_info.in_drag)
3451                 return FALSE;
3452
3453         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3454                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3455                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3456         }
3457
3458         /* Momentum is a moving average of 10ms granularity over
3459          * the last 100ms with each 10ms stored in buffer.
3460          */
3461
3462         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3463         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3464
3465         return TRUE;
3466 }
3467
3468 static gboolean
3469 ev_view_scroll_drag_release (EvView *view)
3470 {
3471         gdouble dhadj_value, dvadj_value;
3472         gdouble oldhadjustment, oldvadjustment;
3473
3474         view->drag_info.momentum.x /= 1.2;
3475         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3476
3477         dhadj_value = view->hadjustment->page_size *
3478                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
3479         dvadj_value = view->vadjustment->page_size *
3480                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
3481
3482         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3483         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3484
3485      /* When we reach the edges, we need either to absorb some momentum and bounce by
3486       * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3487      if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
3488            ((oldhadjustment + dhadj_value) < 0))
3489                 view->drag_info.momentum.x = 0;
3490         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
3491            ((oldvadjustment + dvadj_value) < 0))
3492                 view->drag_info.momentum.y = 0;
3493
3494         gtk_adjustment_set_value (view->hadjustment,
3495                                 MIN (oldhadjustment + dhadj_value,
3496                                 view->hadjustment->upper - view->hadjustment->page_size));
3497         gtk_adjustment_set_value (view->vadjustment,
3498                                 MIN (oldvadjustment + dvadj_value,
3499                                 view->vadjustment->upper - view->vadjustment->page_size));
3500
3501         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3502            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3503                 return FALSE;
3504         else
3505                 return TRUE;
3506 }
3507
3508 static gboolean
3509 ev_view_motion_notify_event (GtkWidget      *widget,
3510                              GdkEventMotion *event)
3511 {
3512         EvView *view = EV_VIEW (widget);
3513         gint x, y;
3514
3515         if (!view->document)
3516                 return FALSE;
3517
3518
3519         if (event->is_hint || event->window != view->layout.bin_window) {
3520             gtk_widget_get_pointer (widget, &x, &y);
3521         } else {
3522             x = event->x;
3523             y = event->y;
3524         }
3525
3526         if (view->scroll_info.autoscrolling) {
3527                 view->scroll_info.last_y = y;
3528                 return TRUE;
3529         }
3530
3531         if (view->selection_info.in_drag) {
3532                 if (gtk_drag_check_threshold (widget,
3533                                               view->selection_info.start.x,
3534                                               view->selection_info.start.y,
3535                                               x, y)) {
3536                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3537
3538                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3539
3540                         gtk_drag_begin (widget, target_list,
3541                                         GDK_ACTION_COPY,
3542                                         1, (GdkEvent *)event);
3543
3544                         view->selection_info.in_drag = FALSE;
3545
3546                         gtk_target_list_unref (target_list);
3547
3548                         return TRUE;
3549                 }
3550         } else if (view->image_dnd_info.in_drag) {
3551                 if (gtk_drag_check_threshold (widget,
3552                                               view->selection_info.start.x,
3553                                               view->selection_info.start.y,
3554                                               x, y)) {
3555                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3556
3557                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3558                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3559
3560                         gtk_drag_begin (widget, target_list,
3561                                         GDK_ACTION_COPY,
3562                                         1, (GdkEvent *)event);
3563
3564                         view->image_dnd_info.in_drag = FALSE;
3565
3566                         gtk_target_list_unref (target_list);
3567
3568                         return TRUE;
3569                 }
3570         }
3571
3572         switch (view->pressed_button) {
3573         case 1:
3574                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3575                  * documents only.
3576                  */
3577                 if (view->rotation != 0)
3578                         return FALSE;
3579
3580                 /* Schedule timeout to scroll during selection and additionally
3581                  * scroll once to allow arbitrary speed. */
3582                 if (!view->selection_scroll_id)
3583                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3584                                                                (GSourceFunc)selection_scroll_timeout_cb,
3585                                                                view);
3586                 else
3587                     selection_scroll_timeout_cb (view);
3588
3589                 view->selection_info.in_selection = TRUE;
3590                 view->motion.x = x + view->scroll_x;
3591                 view->motion.y = y + view->scroll_y;
3592
3593                 /* Queue an idle to handle the motion.  We do this because
3594                  * handling any selection events in the motion could be slower
3595                  * than new motion events reach us.  We always put it in the
3596                  * idle to make sure we catch up and don't visibly lag the
3597                  * mouse. */
3598                 if (!view->selection_update_id)
3599                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3600
3601                 return TRUE;
3602         case 2:
3603                 if (!view->drag_info.in_drag) {
3604                         gboolean start;
3605                         int i;
3606
3607                         start = gtk_drag_check_threshold (widget,
3608                                                           view->drag_info.start.x,
3609                                                           view->drag_info.start.y,
3610                                                           event->x_root,
3611                                                           event->y_root);
3612                         view->drag_info.in_drag = start;
3613                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3614                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3615                         /* Set 100 to choose how long it takes to build up momentum */
3616                         /* Clear out previous momentum info: */
3617                         for (i = 0; i < DRAG_HISTORY; i++) {
3618                                 view->drag_info.buffer[i].x = event->x;
3619                                 view->drag_info.buffer[i].y = event->y;
3620                         }
3621                         view->drag_info.momentum.x = 0;
3622                         view->drag_info.momentum.y = 0;
3623                 }
3624
3625                 if (view->drag_info.in_drag) {
3626                         int dx, dy;
3627                         gdouble dhadj_value, dvadj_value;
3628
3629                         view->drag_info.buffer[0].x = event->x;
3630                         view->drag_info.buffer[0].y = event->y;
3631
3632                         dx = event->x_root - view->drag_info.start.x;
3633                         dy = event->y_root - view->drag_info.start.y;
3634
3635                         dhadj_value = view->hadjustment->page_size *
3636                                       (gdouble)dx / widget->allocation.width;
3637                         dvadj_value = view->vadjustment->page_size *
3638                                       (gdouble)dy / widget->allocation.height;
3639
3640                         /* clamp scrolling to visible area */
3641                         gtk_adjustment_set_value (view->hadjustment,
3642                                                   MIN(view->drag_info.hadj - dhadj_value,
3643                                                       view->hadjustment->upper -
3644                                                       view->hadjustment->page_size));
3645                         gtk_adjustment_set_value (view->vadjustment,
3646                                                   MIN(view->drag_info.vadj - dvadj_value,
3647                                                       view->vadjustment->upper -
3648                                                       view->vadjustment->page_size));
3649
3650                         return TRUE;
3651                 }
3652
3653                 break;
3654         default:
3655                 ev_view_handle_cursor_over_xy (view, x, y);
3656         }
3657
3658         return FALSE;
3659 }
3660
3661 static gboolean
3662 ev_view_button_release_event (GtkWidget      *widget,
3663                               GdkEventButton *event)
3664 {
3665         EvView *view = EV_VIEW (widget);
3666         EvLink *link = NULL;
3667
3668         view->image_dnd_info.in_drag = FALSE;
3669
3670         if (view->scroll_info.autoscrolling) {
3671                 ev_view_autoscroll_stop (view);
3672                 view->pressed_button = -1;
3673
3674                 return TRUE;
3675         }
3676
3677         if (view->drag_info.in_drag) {
3678                 view->drag_info.release_timeout_id =
3679                         g_timeout_add (20,
3680                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3681         }
3682
3683         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3684                 link = ev_view_get_link_at_location (view, event->x, event->y);
3685         }
3686
3687         view->drag_info.in_drag = FALSE;
3688
3689         if (view->pressed_button == 2) {
3690                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3691         }
3692
3693         view->pressed_button = -1;
3694
3695         if (view->selection_scroll_id) {
3696             g_source_remove (view->selection_scroll_id);
3697             view->selection_scroll_id = 0;
3698         }
3699         if (view->selection_update_id) {
3700             g_source_remove (view->selection_update_id);
3701             view->selection_update_id = 0;
3702         }
3703
3704         if (view->selection_info.selections) {
3705                 clear_link_selected (view);
3706                 ev_view_update_primary_selection (view);
3707
3708                 if (view->selection_info.in_drag) {
3709                         clear_selection (view);
3710                         gtk_widget_queue_draw (widget);
3711                 }
3712
3713                 view->selection_info.in_drag = FALSE;
3714         } else if (link) {
3715                 if (event->button == 2) {
3716                         EvLinkAction    *action;
3717                         EvLinkActionType type;
3718
3719                         action = ev_link_get_action (link);
3720                         if (!action)
3721                                 return FALSE;
3722
3723                         type = ev_link_action_get_action_type (action);
3724                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3725                                 g_signal_emit (view,
3726                                                signals[SIGNAL_EXTERNAL_LINK],
3727                                                0, action);
3728                         }
3729                 } else {
3730                         ev_view_handle_link (view, link);
3731                 }
3732         } else if (view->presentation) {
3733                 switch (event->button) {
3734                         case 1:
3735                                 ev_view_next_page (view);
3736                                 return TRUE;
3737                         case 3:
3738                                 ev_view_previous_page (view);
3739                                 return TRUE;
3740                 }
3741         }
3742
3743         return FALSE;
3744 }
3745
3746 /* Goto Window */
3747 /* Cut and paste from gtkwindow.c */
3748 static void
3749 send_focus_change (GtkWidget *widget,
3750                    gboolean   in)
3751 {
3752         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3753
3754         g_object_ref (widget);
3755
3756         if (in)
3757                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3758         else
3759                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3760
3761         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3762         fevent->focus_change.window = g_object_ref (widget->window);
3763         fevent->focus_change.in = in;
3764
3765         gtk_widget_event (widget, fevent);
3766
3767         g_object_notify (G_OBJECT (widget), "has-focus");
3768
3769         g_object_unref (widget);
3770         gdk_event_free (fevent);
3771 }
3772
3773 static void
3774 ev_view_goto_window_hide (EvView *view)
3775 {
3776         /* send focus-in event */
3777         send_focus_change (view->goto_entry, FALSE);
3778         gtk_widget_hide (view->goto_window);
3779         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3780 }
3781
3782 static gboolean
3783 ev_view_goto_window_delete_event (GtkWidget   *widget,
3784                                   GdkEventAny *event,
3785                                   EvView      *view)
3786 {
3787         ev_view_goto_window_hide (view);
3788
3789         return TRUE;
3790 }
3791
3792 static gboolean
3793 key_is_numeric (guint keyval)
3794 {
3795         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3796                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3797 }
3798
3799 static gboolean
3800 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3801                                      GdkEventKey *event,
3802                                      EvView      *view)
3803 {
3804         switch (event->keyval) {
3805                 case GDK_Escape:
3806                 case GDK_Tab:
3807                 case GDK_KP_Tab:
3808                 case GDK_ISO_Left_Tab:
3809                         ev_view_goto_window_hide (view);
3810                         return TRUE;
3811                 case GDK_Return:
3812                 case GDK_KP_Enter:
3813                 case GDK_ISO_Enter:
3814                 case GDK_BackSpace:
3815                 case GDK_Delete:
3816                         return FALSE;
3817                 default:
3818                         if (!key_is_numeric (event->keyval))
3819                                 return TRUE;
3820         }
3821
3822         return FALSE;
3823 }
3824
3825 static gboolean
3826 ev_view_goto_window_button_press_event (GtkWidget      *widget,
3827                                         GdkEventButton *event,
3828                                         EvView         *view)
3829 {
3830         ev_view_goto_window_hide (view);
3831
3832         return TRUE;
3833 }
3834
3835 static void
3836 ev_view_goto_entry_activate (GtkEntry *entry,
3837                              EvView   *view)
3838 {
3839         const gchar *text;
3840         gint         page;
3841
3842         text = gtk_entry_get_text (entry);
3843         page = atoi (text) - 1;
3844
3845         ev_view_goto_window_hide (view);
3846
3847         if (page >= 0 && page < ev_document_get_n_pages (view->document))
3848                 ev_page_cache_set_current_page (view->page_cache, page);
3849 }
3850
3851 static void
3852 ev_view_goto_window_create (EvView *view)
3853 {
3854         GtkWidget *frame, *hbox, *toplevel, *label;
3855
3856         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
3857
3858         if (view->goto_window) {
3859                 if (GTK_WINDOW (toplevel)->group)
3860                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3861                                                      GTK_WINDOW (view->goto_window));
3862                 else if (GTK_WINDOW (view->goto_window)->group)
3863                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
3864                                                         GTK_WINDOW (view->goto_window));
3865                 return;
3866         }
3867
3868         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
3869         gtk_window_set_screen (GTK_WINDOW (view->goto_window),
3870                                gtk_widget_get_screen (GTK_WIDGET (view)));
3871
3872         if (GTK_WINDOW (toplevel)->group)
3873                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3874                                              GTK_WINDOW (view->goto_window));
3875
3876         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
3877
3878         g_signal_connect (view->goto_window, "delete_event",
3879                           G_CALLBACK (ev_view_goto_window_delete_event),
3880                           view);
3881         g_signal_connect (view->goto_window, "key_press_event",
3882                           G_CALLBACK (ev_view_goto_window_key_press_event),
3883                           view);
3884         g_signal_connect (view->goto_window, "button_press_event",
3885                           G_CALLBACK (ev_view_goto_window_button_press_event),
3886                           view);
3887
3888         frame = gtk_frame_new (NULL);
3889         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
3890         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
3891         gtk_widget_show (frame);
3892
3893         hbox = gtk_hbox_new (FALSE, 0);
3894         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
3895         gtk_container_add (GTK_CONTAINER (frame), hbox);
3896         gtk_widget_show (hbox);
3897
3898         label = gtk_label_new(_("Jump to page:"));
3899         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
3900         gtk_widget_show (label);
3901         gtk_widget_realize (label);
3902
3903         view->goto_entry = gtk_entry_new ();
3904         g_signal_connect (view->goto_entry, "activate",
3905                           G_CALLBACK (ev_view_goto_entry_activate),
3906                           view);
3907         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
3908         gtk_widget_show (view->goto_entry);
3909         gtk_widget_realize (view->goto_entry);
3910 }
3911
3912 static void
3913 ev_view_goto_entry_grab_focus (EvView *view)
3914 {
3915         GtkWidgetClass *entry_parent_class;
3916
3917         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
3918         (entry_parent_class->grab_focus) (view->goto_entry);
3919
3920         send_focus_change (view->goto_entry, TRUE);
3921 }
3922
3923 static void
3924 ev_view_goto_window_send_key_event (EvView   *view,
3925                                     GdkEvent *event)
3926 {
3927         GdkEventKey *new_event;
3928         GdkScreen   *screen;
3929
3930         /* Move goto window off screen */
3931         screen = gtk_widget_get_screen (GTK_WIDGET (view));
3932         gtk_window_move (GTK_WINDOW (view->goto_window),
3933                          gdk_screen_get_width (screen) + 1,
3934                          gdk_screen_get_height (screen) + 1);
3935         gtk_widget_show (view->goto_window);
3936
3937         new_event = (GdkEventKey *) gdk_event_copy (event);
3938         g_object_unref (new_event->window);
3939         new_event->window = g_object_ref (view->goto_window->window);
3940         gtk_widget_realize (view->goto_window);
3941
3942         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
3943         gdk_event_free ((GdkEvent *)new_event);
3944         gtk_widget_hide (view->goto_window);
3945 }
3946
3947 static gboolean
3948 ev_view_key_press_event (GtkWidget   *widget,
3949                          GdkEventKey *event)
3950 {
3951         EvView *view = EV_VIEW (widget);
3952         EvPresentationState current;
3953
3954         if (!view->document)
3955                 return FALSE;
3956
3957         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3958                 /* Forward key events to current focused window child */
3959                 if (view->window_child_focus) {
3960                         GdkEventKey *new_event;
3961                         gboolean     handled;
3962
3963                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
3964                         g_object_unref (new_event->window);
3965                         new_event->window = g_object_ref (view->window_child_focus->window->window);
3966                         gtk_widget_realize (view->window_child_focus->window);
3967                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
3968                         gdk_event_free ((GdkEvent *)new_event);
3969
3970                         return handled;
3971                 }
3972
3973                 return FALSE;
3974         }
3975
3976         if (!view->presentation ||
3977             view->presentation_state == EV_PRESENTATION_END)
3978                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3979
3980
3981         current = view->presentation_state;
3982
3983         switch (event->keyval) {
3984                 case GDK_b:
3985                 case GDK_B:
3986                 case GDK_period:
3987                 case GDK_KP_Decimal:
3988                         view->presentation_state =
3989                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
3990                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
3991                         break;
3992                 case GDK_w:
3993                 case GDK_W:
3994                         view->presentation_state =
3995                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
3996                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
3997                         break;
3998                 default:
3999                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
4000                             view->presentation_state == EV_PRESENTATION_WHITE) {
4001                                 view->presentation_state = EV_PRESENTATION_NORMAL;
4002                         }
4003         }
4004
4005         if (current == view->presentation_state) {
4006                 if (ev_document_get_n_pages (view->document) > 1 &&
4007                     key_is_numeric (event->keyval)) {
4008                         gint x, y;
4009
4010                         ev_view_goto_window_create (view);
4011                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
4012                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4013                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
4014                         gtk_widget_show (view->goto_window);
4015                         ev_view_goto_entry_grab_focus (view);
4016
4017                         return TRUE;
4018                 }
4019
4020                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4021         }
4022
4023         switch (view->presentation_state) {
4024                 case EV_PRESENTATION_NORMAL:
4025                 case EV_PRESENTATION_BLACK:
4026                         gdk_window_set_background (view->layout.bin_window,
4027                                                    &widget->style->black);
4028                         break;
4029                 case EV_PRESENTATION_WHITE:
4030                         gdk_window_set_background (view->layout.bin_window,
4031                                                    &widget->style->white);
4032                         break;
4033                 default:
4034                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4035         }
4036
4037         gtk_widget_queue_draw (widget);
4038         return TRUE;
4039 }
4040
4041 static gint
4042 ev_view_focus_in (GtkWidget     *widget,
4043                   GdkEventFocus *event)
4044 {
4045         if (EV_VIEW (widget)->pixbuf_cache)
4046                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4047         gtk_widget_queue_draw (widget);
4048
4049         return FALSE;
4050 }
4051
4052 static gint
4053 ev_view_focus_out (GtkWidget     *widget,
4054                      GdkEventFocus *event)
4055 {
4056         if (EV_VIEW (widget)->goto_window)
4057                 ev_view_goto_window_hide (EV_VIEW (widget));
4058
4059         if (EV_VIEW (widget)->pixbuf_cache)
4060                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4061         gtk_widget_queue_draw (widget);
4062
4063         return FALSE;
4064 }
4065
4066 static gboolean
4067 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4068 {
4069         EvView *view = EV_VIEW (widget);
4070
4071         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4072                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4073
4074         return FALSE;
4075 }
4076
4077 static gboolean
4078 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4079 {
4080         EvView *view = EV_VIEW (widget);
4081
4082         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4083
4084         return FALSE;
4085 }
4086
4087 static void
4088 ev_view_style_set (GtkWidget *widget,
4089                    GtkStyle  *old_style)
4090 {
4091         if (EV_VIEW (widget)->pixbuf_cache)
4092                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4093
4094         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
4095 }
4096
4097 /*** Drawing ***/
4098
4099 static guint32
4100 ev_gdk_color_to_rgb (const GdkColor *color)
4101 {
4102   guint32 result;
4103   result = (0xff0000 | (color->red & 0xff00));
4104   result <<= 8;
4105   result |= ((color->green & 0xff00) | (color->blue >> 8));
4106   return result;
4107 }
4108
4109 static void
4110 draw_rubberband (GtkWidget *widget, GdkWindow *window,
4111                  const GdkRectangle *rect, guchar alpha)
4112 {
4113         GdkGC *gc;
4114         GdkPixbuf *pixbuf;
4115         GdkColor *fill_color_gdk;
4116         guint fill_color;
4117
4118         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
4119         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
4120
4121         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
4122                                  rect->width, rect->height);
4123         gdk_pixbuf_fill (pixbuf, fill_color);
4124
4125         gdk_draw_pixbuf (window, NULL, pixbuf,
4126                          0, 0,
4127                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4128                          rect->width, rect->height,
4129                          GDK_RGB_DITHER_NONE,
4130                          0, 0);
4131
4132         g_object_unref (pixbuf);
4133
4134         gc = gdk_gc_new (window);
4135         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
4136         gdk_draw_rectangle (window, gc, FALSE,
4137                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4138                             rect->width - 1,
4139                             rect->height - 1);
4140         g_object_unref (gc);
4141
4142         gdk_color_free (fill_color_gdk);
4143 }
4144
4145
4146 static void
4147 highlight_find_results (EvView *view, int page)
4148 {
4149         gint i, n_results = 0;
4150
4151         n_results = ev_view_find_get_n_results (view, page);
4152
4153         for (i = 0; i < n_results; i++) {
4154                 EvRectangle *rectangle;
4155                 GdkRectangle view_rectangle;
4156                 guchar alpha;
4157
4158                 if (i == view->find_result && page == view->current_page) {
4159                         alpha = 0x90;
4160                 } else {
4161                         alpha = 0x20;
4162                 }
4163
4164                 rectangle = ev_view_find_get_result (view, page, i);
4165                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4166                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
4167                                  &view_rectangle, alpha);
4168         }
4169 }
4170
4171 static void
4172 draw_loading_text (EvView       *view,
4173                    GdkRectangle *page_area,
4174                    GdkRectangle *expose_area)
4175 {
4176         cairo_t *cr;
4177         gint     width, height;
4178
4179         if (!view->loading_text) {
4180                 const gchar *loading_text = _("Loading...");
4181                 PangoLayout *layout;
4182                 PangoFontDescription *font_desc;
4183                 PangoRectangle logical_rect;
4184                 gint target_width;
4185                 gdouble real_scale;
4186
4187                 ev_document_fc_mutex_lock ();
4188
4189                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
4190
4191                 font_desc = pango_font_description_new ();
4192
4193                 /* We set the font to be 10 points, get the size, and scale appropriately */
4194                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
4195                 pango_layout_set_font_description (layout, font_desc);
4196                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4197
4198                 target_width = MAX (page_area->width / 2, 1);
4199                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
4200                 pango_font_description_set_size (font_desc, (int)real_scale);
4201                 pango_layout_set_font_description (layout, font_desc);
4202                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4203
4204                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
4205                                                                  logical_rect.width,
4206                                                                  logical_rect.height);
4207                 cr = cairo_create (view->loading_text);
4208                 cairo_set_source_rgb (cr,
4209                                       155 / (double)255,
4210                                       155 / (double)255,
4211                                       155 / (double)255);
4212                 pango_cairo_show_layout (cr, layout);
4213                 cairo_destroy (cr);
4214
4215                 pango_font_description_free (font_desc);
4216                 g_object_unref (layout);
4217
4218                 ev_document_fc_mutex_unlock ();
4219         }
4220
4221         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
4222         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
4223
4224         cr = gdk_cairo_create (view->layout.bin_window);
4225         cairo_translate (cr,
4226                          page_area->x + width,
4227                          page_area->y + height);
4228         cairo_set_source_surface (cr, view->loading_text, 0, 0);
4229         cairo_paint (cr);
4230         cairo_destroy (cr);
4231 }
4232
4233 static void
4234 draw_one_page (EvView       *view,
4235                gint          page,
4236                cairo_t      *cr,
4237                GdkRectangle *page_area,
4238                GtkBorder    *border,
4239                GdkRectangle *expose_area,
4240                gboolean     *page_ready)
4241 {
4242         GdkRectangle overlap;
4243         GdkRectangle real_page_area;
4244
4245         g_assert (view->document);
4246
4247         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4248                 return;
4249
4250         /* Render the document itself */
4251         real_page_area = *page_area;
4252
4253         real_page_area.x += border->left;
4254         real_page_area.y += border->top;
4255         real_page_area.width -= (border->left + border->right);
4256         real_page_area.height -= (border->top + border->bottom);
4257         *page_ready = TRUE;
4258
4259         if (!view->presentation) {
4260                 gint current_page;
4261
4262                 current_page = ev_page_cache_get_current_page (view->page_cache);
4263                 ev_document_misc_paint_one_page (view->layout.bin_window,
4264                                                  GTK_WIDGET (view),
4265                                                  page_area, border,
4266                                                  page == current_page);
4267         }
4268
4269         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4270                 gint             width, height;
4271                 gint             page_width, page_height;
4272                 cairo_surface_t *page_surface = NULL;
4273                 gint             selection_width, selection_height;
4274                 cairo_surface_t *selection_surface = NULL;
4275
4276                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4277
4278                 if (!page_surface) {
4279                         if (!view->presentation) {
4280                                 draw_loading_text (view,
4281                                                    &real_page_area,
4282                                                    expose_area);
4283                         }
4284
4285                         *page_ready = FALSE;
4286
4287                         return;
4288                 }
4289
4290                 ev_page_cache_get_size (view->page_cache,
4291                                         page, view->rotation,
4292                                         view->scale,
4293                                         &width, &height);
4294
4295                 page_width = cairo_image_surface_get_width (page_surface);
4296                 page_height = cairo_image_surface_get_height (page_surface);
4297
4298                 cairo_save (cr);
4299                 cairo_translate (cr, overlap.x, overlap.y);
4300
4301                 if (width != page_width || height != page_height) {
4302                         cairo_pattern_set_filter (cairo_get_source (cr),
4303                                                   CAIRO_FILTER_FAST);
4304                         cairo_scale (cr,
4305                                      (gdouble)width / page_width,
4306                                      (gdouble)height / page_height);
4307                 }
4308
4309                 cairo_surface_set_device_offset (page_surface,
4310                                                  overlap.x - real_page_area.x,
4311                                                  overlap.y - real_page_area.y);
4312                 cairo_set_source_surface (cr, page_surface, 0, 0);
4313                 cairo_paint (cr);
4314                 cairo_restore (cr);
4315
4316                 /* Get the selection pixbuf iff we have something to draw */
4317                 if (find_selection_for_page (view, page) &&
4318                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4319                         selection_surface =
4320                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4321                                                                        page,
4322                                                                        view->scale,
4323                                                                        NULL);
4324                 }
4325
4326                 if (!selection_surface) {
4327                         return;
4328                 }
4329
4330                 selection_width = cairo_image_surface_get_width (selection_surface);
4331                 selection_height = cairo_image_surface_get_height (selection_surface);
4332
4333                 cairo_save (cr);
4334                 cairo_translate (cr, overlap.x, overlap.y);
4335
4336                 if (width != selection_width || height != selection_height) {
4337                         cairo_pattern_set_filter (cairo_get_source (cr),
4338                                                   CAIRO_FILTER_FAST);
4339                         cairo_scale (cr,
4340                                      (gdouble)width / selection_width,
4341                                      (gdouble)height / selection_height);
4342                 }
4343
4344                 cairo_surface_set_device_offset (selection_surface,
4345                                                  overlap.x - real_page_area.x,
4346                                                  overlap.y - real_page_area.y);
4347                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4348                 cairo_paint (cr);
4349                 cairo_restore (cr);
4350         }
4351 }
4352
4353 /*** GObject functions ***/
4354
4355 static void
4356 ev_view_finalize (GObject *object)
4357 {
4358         EvView *view = EV_VIEW (object);
4359
4360         clear_selection (view);
4361         clear_link_selected (view);
4362
4363         if (view->image_dnd_info.image)
4364                 g_object_unref (view->image_dnd_info.image);
4365         view->image_dnd_info.image = NULL;
4366
4367         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4368 }
4369
4370 static void
4371 ev_view_destroy (GtkObject *object)
4372 {
4373         EvView *view = EV_VIEW (object);
4374
4375         if (view->document) {
4376                 g_object_unref (view->document);
4377                 view->document = NULL;
4378         }
4379
4380         if (view->pixbuf_cache) {
4381                 g_object_unref (view->pixbuf_cache);
4382                 view->pixbuf_cache = NULL;
4383         }
4384
4385         if (view->goto_window) {
4386                 gtk_widget_destroy (view->goto_window);
4387                 view->goto_window = NULL;
4388                 view->goto_entry = NULL;
4389         }
4390
4391         ev_view_window_children_free (view);
4392
4393         if (view->selection_scroll_id) {
4394             g_source_remove (view->selection_scroll_id);
4395             view->selection_scroll_id = 0;
4396         }
4397
4398         if (view->selection_update_id) {
4399             g_source_remove (view->selection_update_id);
4400             view->selection_update_id = 0;
4401         }
4402
4403         if (view->loading_text) {
4404                 cairo_surface_destroy (view->loading_text);
4405                 view->loading_text = NULL;
4406         }
4407
4408         if (view->scroll_info.timeout_id) {
4409             g_source_remove (view->scroll_info.timeout_id);
4410             view->scroll_info.timeout_id = 0;
4411         }
4412
4413         if (view->drag_info.drag_timeout_id) {
4414                 g_source_remove (view->drag_info.drag_timeout_id);
4415                 view->drag_info.drag_timeout_id = 0;
4416         }
4417
4418         if (view->drag_info.release_timeout_id) {
4419                 g_source_remove (view->drag_info.release_timeout_id);
4420                 view->drag_info.release_timeout_id = 0;
4421         }
4422
4423         ev_view_presentation_transition_stop (view);
4424
4425         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4426
4427         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4428 }
4429
4430 static void
4431 ev_view_set_property (GObject      *object,
4432                       guint         prop_id,
4433                       const GValue *value,
4434                       GParamSpec   *pspec)
4435 {
4436         EvView *view = EV_VIEW (object);
4437
4438         switch (prop_id) {
4439                 case PROP_CONTINUOUS:
4440                         ev_view_set_continuous (view, g_value_get_boolean (value));
4441                         break;
4442                 case PROP_DUAL_PAGE:
4443                         ev_view_set_dual_page (view, g_value_get_boolean (value));
4444                         break;
4445                 case PROP_FULLSCREEN:
4446                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
4447                         break;
4448                 case PROP_PRESENTATION:
4449                         ev_view_set_presentation (view, g_value_get_boolean (value));
4450                         break;
4451                 case PROP_SIZING_MODE:
4452                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
4453                         break;
4454                 case PROP_ZOOM:
4455                         ev_view_set_zoom (view, g_value_get_double (value), FALSE);
4456                         break;
4457                 case PROP_ROTATION:
4458                         ev_view_set_rotation (view, g_value_get_int (value));
4459                         break;
4460                 default:
4461                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4462         }
4463 }
4464
4465 static AtkObject *
4466 ev_view_get_accessible (GtkWidget *widget)
4467 {
4468         static gboolean first_time = TRUE;
4469
4470         if (first_time) {
4471                 AtkObjectFactory *factory;
4472                 AtkRegistry *registry;
4473                 GType derived_type;
4474                 GType derived_atk_type;
4475
4476                 /*
4477                  * Figure out whether accessibility is enabled by looking at the
4478                  * type of the accessible object which would be created for
4479                  * the parent type of EvView.
4480                  */
4481                 derived_type = g_type_parent (EV_TYPE_VIEW);
4482
4483                 registry = atk_get_default_registry ();
4484                 factory = atk_registry_get_factory (registry,
4485                                                     derived_type);
4486                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4487                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4488                         atk_registry_set_factory_type (registry,
4489                                                        EV_TYPE_VIEW,
4490                                                        ev_view_accessible_factory_get_type ());
4491                 first_time = FALSE;
4492         }
4493         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4494 }
4495
4496 static void
4497 ev_view_get_property (GObject *object,
4498                       guint prop_id,
4499                       GValue *value,
4500                       GParamSpec *pspec)
4501 {
4502         EvView *view = EV_VIEW (object);
4503
4504         switch (prop_id) {
4505                 case PROP_CONTINUOUS:
4506                         g_value_set_boolean (value, view->continuous);
4507                         break;
4508                 case PROP_DUAL_PAGE:
4509                         g_value_set_boolean (value, view->dual_page);
4510                         break;
4511                 case PROP_FULLSCREEN:
4512                         g_value_set_boolean (value, view->fullscreen);
4513                         break;
4514                 case PROP_PRESENTATION:
4515                         g_value_set_boolean (value, view->presentation);
4516                         break;
4517                 case PROP_SIZING_MODE:
4518                         g_value_set_enum (value, view->sizing_mode);
4519                         break;
4520                 case PROP_ZOOM:
4521                         g_value_set_double (value, view->scale);
4522                         break;
4523                 case PROP_ROTATION:
4524                         g_value_set_int (value, view->rotation);
4525                         break;
4526                 case PROP_HAS_SELECTION:
4527                         g_value_set_boolean (value,
4528                                              view->selection_info.selections != NULL);
4529                         break;
4530                 default:
4531                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4532         }
4533 }
4534
4535 static void
4536 ev_view_class_init (EvViewClass *class)
4537 {
4538         GObjectClass *object_class = G_OBJECT_CLASS (class);
4539         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4540         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4541         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4542         GtkBindingSet *binding_set;
4543
4544         object_class->finalize = ev_view_finalize;
4545         object_class->set_property = ev_view_set_property;
4546         object_class->get_property = ev_view_get_property;
4547
4548         widget_class->expose_event = ev_view_expose_event;
4549         widget_class->button_press_event = ev_view_button_press_event;
4550         widget_class->motion_notify_event = ev_view_motion_notify_event;
4551         widget_class->button_release_event = ev_view_button_release_event;
4552         widget_class->key_press_event = ev_view_key_press_event;
4553         widget_class->focus_in_event = ev_view_focus_in;
4554         widget_class->focus_out_event = ev_view_focus_out;
4555         widget_class->get_accessible = ev_view_get_accessible;
4556         widget_class->size_request = ev_view_size_request;
4557         widget_class->size_allocate = ev_view_size_allocate;
4558         widget_class->realize = ev_view_realize;
4559         widget_class->scroll_event = ev_view_scroll_event;
4560         widget_class->enter_notify_event = ev_view_enter_notify_event;
4561         widget_class->leave_notify_event = ev_view_leave_notify_event;
4562         widget_class->style_set = ev_view_style_set;
4563         widget_class->drag_data_get = ev_view_drag_data_get;
4564         widget_class->drag_motion = ev_view_drag_motion;
4565         widget_class->popup_menu = ev_view_popup_menu;
4566         widget_class->query_tooltip = ev_view_query_tooltip;
4567
4568         gtk_object_class->destroy = ev_view_destroy;
4569
4570         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4571
4572         class->binding_activated = ev_view_scroll;
4573
4574         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4575                          G_TYPE_FROM_CLASS (object_class),
4576                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4577                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4578                          NULL, NULL,
4579                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4580                          G_TYPE_NONE, 2,
4581                          GTK_TYPE_SCROLL_TYPE,
4582                          G_TYPE_BOOLEAN);
4583
4584         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
4585                          G_TYPE_FROM_CLASS (object_class),
4586                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4587                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
4588                          NULL, NULL,
4589                          g_cclosure_marshal_VOID__VOID,
4590                          G_TYPE_NONE, 0, G_TYPE_NONE);
4591         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4592                          G_TYPE_FROM_CLASS (object_class),
4593                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4594                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4595                          NULL, NULL,
4596                          g_cclosure_marshal_VOID__OBJECT,
4597                          G_TYPE_NONE, 1,
4598                          G_TYPE_OBJECT);
4599         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4600                          G_TYPE_FROM_CLASS (object_class),
4601                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4602                          G_STRUCT_OFFSET (EvViewClass, external_link),
4603                          NULL, NULL,
4604                          g_cclosure_marshal_VOID__OBJECT,
4605                          G_TYPE_NONE, 1,
4606                          G_TYPE_OBJECT);
4607         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4608                          G_TYPE_FROM_CLASS (object_class),
4609                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4610                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4611                          NULL, NULL,
4612                          g_cclosure_marshal_VOID__OBJECT,
4613                          G_TYPE_NONE, 1,
4614                          G_TYPE_OBJECT);
4615
4616
4617         g_object_class_install_property (object_class,
4618                                          PROP_CONTINUOUS,
4619                                          g_param_spec_boolean ("continuous",
4620                                                                "Continuous",
4621                                                                "Continuous scrolling mode",
4622                                                                TRUE,
4623                                                                G_PARAM_READWRITE));
4624
4625         g_object_class_install_property (object_class,
4626                                          PROP_DUAL_PAGE,
4627                                          g_param_spec_boolean ("dual-page",
4628                                                                "Dual Page",
4629                                                                "Two pages visible at once",
4630                                                                FALSE,
4631                                                                G_PARAM_READWRITE));
4632         g_object_class_install_property (object_class,
4633                                          PROP_FULLSCREEN,
4634                                          g_param_spec_boolean ("fullscreen",
4635                                                                "Full Screen",
4636                                                                "Draw page in a fullscreen fashion",
4637                                                                FALSE,
4638                                                                G_PARAM_READWRITE));
4639         g_object_class_install_property (object_class,
4640                                          PROP_PRESENTATION,
4641                                          g_param_spec_boolean ("presentation",
4642                                                                "Presentation",
4643                                                                "Draw page in presentation mode",
4644                                                                TRUE,
4645                                                                G_PARAM_READWRITE));
4646
4647         g_object_class_install_property (object_class,
4648                                          PROP_SIZING_MODE,
4649                                          g_param_spec_enum ("sizing-mode",
4650                                                             "Sizing Mode",
4651                                                             "Sizing Mode",
4652                                                             EV_TYPE_SIZING_MODE,
4653                                                             EV_SIZING_FIT_WIDTH,
4654                                                             G_PARAM_READWRITE));
4655
4656         g_object_class_install_property (object_class,
4657                                          PROP_ZOOM,
4658                                          g_param_spec_double ("zoom",
4659                                                               "Zoom factor",
4660                                                               "Zoom factor",
4661                                                               0,
4662                                                               G_MAXDOUBLE,
4663                                                               1.0,
4664                                                               G_PARAM_READWRITE));
4665         g_object_class_install_property (object_class,
4666                                          PROP_ROTATION,
4667                                          g_param_spec_double ("rotation",
4668                                                               "Rotation",
4669                                                               "Rotation",
4670                                                               0,
4671                                                               360,
4672                                                               0,
4673                                                               G_PARAM_READWRITE));
4674         g_object_class_install_property (object_class,
4675                                          PROP_HAS_SELECTION,
4676                                          g_param_spec_boolean ("has-selection",
4677                                                                "Has selection",
4678                                                                "The view has selections",
4679                                                                FALSE,
4680                                                                G_PARAM_READABLE));
4681
4682         binding_set = gtk_binding_set_by_class (class);
4683
4684         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4685         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4686         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4687         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4688         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4689         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4690         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4691         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4692         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4693                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4694         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4695                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4696         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4697                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4698         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4699                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4700
4701 }
4702
4703 static void
4704 ev_view_init (EvView *view)
4705 {
4706         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4707
4708         view->start_page = -1;
4709         view->end_page = -1;
4710         view->spacing = 5;
4711         view->scale = 1.0;
4712         view->current_page = 0;
4713         view->pressed_button = -1;
4714         view->cursor = EV_VIEW_CURSOR_NORMAL;
4715         view->drag_info.in_drag = FALSE;
4716         view->scroll_info.autoscrolling = FALSE;
4717         view->selection_info.selections = NULL;
4718         view->selection_info.in_selection = FALSE;
4719         view->selection_info.in_drag = FALSE;
4720         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4721         view->continuous = TRUE;
4722         view->dual_page = FALSE;
4723         view->presentation = FALSE;
4724         view->presentation_state = EV_PRESENTATION_NORMAL;
4725         view->fullscreen = FALSE;
4726         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4727         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4728         view->jump_to_find_result = TRUE;
4729         view->highlight_find_results = FALSE;
4730
4731         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4732         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4733 }
4734
4735 /*** Callbacks ***/
4736
4737 static void
4738 ev_view_change_page (EvView *view,
4739                      gint    new_page,
4740                      gboolean start_transition)
4741 {
4742         gint x, y;
4743
4744         view->current_page = new_page;
4745         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4746
4747         if (view->presentation && start_transition)
4748                 ev_view_presentation_transition_start (view);
4749
4750         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4751         ev_view_handle_cursor_over_xy (view, x, y);
4752
4753         gtk_widget_queue_resize (GTK_WIDGET (view));
4754 }
4755
4756 static void
4757 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4758                                      EvView                *view)
4759 {
4760         g_object_unref (view->animation);
4761         view->animation = NULL;
4762         ev_view_change_page (view, view->current_page, TRUE);
4763 }
4764
4765 /**
4766  * ev_view_transition_animation_cancel:
4767  * @animation: Animation to finish
4768  * @view: An EvView
4769  *
4770  * Does almost the same as cancel, but without scheduling the transition.
4771  */
4772
4773 static void
4774 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4775                                      EvView                *view)
4776 {
4777         g_object_unref (view->animation);
4778         view->animation = NULL;
4779         ev_view_change_page (view, view->current_page, FALSE);
4780 }
4781
4782 static void
4783 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4784                                     gdouble                progress,
4785                                     EvView                *view)
4786 {
4787         gtk_widget_queue_draw (GTK_WIDGET (view));
4788 }
4789
4790 static void
4791 ev_view_presentation_animation_start (EvView *view,
4792                                       int     new_page)
4793 {
4794         EvTransitionEffect *effect = NULL;
4795         cairo_surface_t *surface;
4796
4797         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4798                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4799                                                             view->current_page);
4800         if (!effect)
4801                 return;
4802
4803         view->animation = ev_transition_animation_new (effect);
4804
4805         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4806         ev_transition_animation_set_origin_surface (view->animation, surface);
4807         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, new_page);
4808         if (surface)
4809                 ev_transition_animation_set_dest_surface (view->animation, surface);
4810
4811         g_signal_connect (view->animation, "frame",
4812                           G_CALLBACK (ev_view_transition_animation_frame), view);
4813         g_signal_connect (view->animation, "finished",
4814                           G_CALLBACK (ev_view_transition_animation_finish), view);
4815 }
4816
4817 static void
4818 job_finished_cb (EvPixbufCache *pixbuf_cache,
4819                  GdkRegion     *region,
4820                  EvView        *view)
4821 {
4822         if (view->animation) {
4823                 cairo_surface_t *surface;
4824
4825                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4826                 ev_transition_animation_set_dest_surface (view->animation, surface);
4827         }
4828
4829         if (region) {
4830                 gdk_window_invalidate_region (view->layout.bin_window,
4831                                               region, TRUE);
4832         } else {
4833                 gtk_widget_queue_draw (GTK_WIDGET (view));
4834         }
4835 }
4836
4837 static void
4838 page_changed_cb (EvPageCache *page_cache,
4839                  int          new_page,
4840                  EvView      *view)
4841 {
4842         if (view->current_page != new_page) {
4843                 if (view->presentation)
4844                         ev_view_presentation_animation_start (view, new_page);
4845
4846                 ev_view_change_page (view, new_page, TRUE);
4847         } else {
4848                 gtk_widget_queue_draw (GTK_WIDGET (view));
4849         }
4850
4851         view->find_result = 0;
4852 }
4853
4854 static void
4855 on_adjustment_value_changed (GtkAdjustment *adjustment,
4856                              EvView        *view)
4857 {
4858         int dx = 0, dy = 0;
4859         gint x, y;
4860         GList *children, *l;
4861
4862         if (! GTK_WIDGET_REALIZED (view))
4863                 return;
4864
4865         if (view->hadjustment) {
4866                 dx = view->scroll_x - (int) view->hadjustment->value;
4867                 view->scroll_x = (int) view->hadjustment->value;
4868         } else {
4869                 view->scroll_x = 0;
4870         }
4871
4872         if (view->vadjustment) {
4873                 dy = view->scroll_y - (int) view->vadjustment->value;
4874                 view->scroll_y = (int) view->vadjustment->value;
4875         } else {
4876                 view->scroll_y = 0;
4877         }
4878
4879         children = gtk_container_get_children (GTK_CONTAINER (view));
4880         for (l = children; l && l->data; l = g_list_next (l)) {
4881                 gint       child_x, child_y;
4882                 GtkWidget *child = (GtkWidget *)l->data;
4883
4884                 gtk_container_child_get (GTK_CONTAINER (view),
4885                                          child,
4886                                          "x", &child_x,
4887                                          "y", &child_y,
4888                                          NULL);
4889                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4890         }
4891         g_list_free (children);
4892
4893         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4894                 EvViewWindowChild *child;
4895
4896                 child = (EvViewWindowChild *)l->data;
4897
4898                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4899         }
4900
4901         if (view->pending_resize)
4902                 gtk_widget_queue_draw (GTK_WIDGET (view));
4903         else
4904                 gdk_window_scroll (view->layout.bin_window, dx, dy);
4905
4906         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4907         ev_view_handle_cursor_over_xy (view, x, y);
4908
4909         if (view->document)
4910                 view_update_range_and_current_page (view);
4911 }
4912
4913 GtkWidget*
4914 ev_view_new (void)
4915 {
4916         GtkWidget *view;
4917
4918         view = g_object_new (EV_TYPE_VIEW, NULL);
4919
4920         return view;
4921 }
4922
4923 static void
4924 setup_caches (EvView *view)
4925 {
4926         view->page_cache = ev_page_cache_get (view->document);
4927         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
4928         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
4929         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
4930         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4931         page_changed_cb (view->page_cache,
4932                          ev_page_cache_get_current_page (view->page_cache),
4933                          view);
4934 }
4935
4936 static void
4937 clear_caches (EvView *view)
4938 {
4939         if (view->pixbuf_cache) {
4940                 g_object_unref (view->pixbuf_cache);
4941                 view->pixbuf_cache = NULL;
4942         }
4943
4944         if (view->page_cache) {
4945                 view->page_cache = NULL;
4946         }
4947 }
4948
4949 void
4950 ev_view_set_loading (EvView       *view,
4951                      gboolean      loading)
4952 {
4953         view->loading = loading;
4954         gtk_widget_queue_draw (GTK_WIDGET (view));
4955 }
4956
4957 static gboolean
4958 ev_view_autoscroll_cb (EvView *view)
4959 {
4960         gdouble speed, value;
4961
4962         /* If the user stops autoscrolling, autoscrolling will be
4963          * set to false but the timeout will continue; stop the timeout: */
4964         if (!view->scroll_info.autoscrolling) {
4965                 view->scroll_info.timeout_id = 0;
4966                 return FALSE;
4967         }
4968
4969         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4970                 (view->scroll_info.last_y < view->scroll_info.start_y))
4971                 return TRUE;
4972
4973         /* Replace 100 with your speed of choice: The lower the faster.
4974          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4975          *      based on the distance of the starting point from the mouse
4976          * (All also effected by the timeout interval of this callback) */
4977
4978         if (view->scroll_info.start_y > view->scroll_info.last_y)
4979                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
4980         else
4981                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
4982
4983         value = gtk_adjustment_get_value (view->vadjustment);
4984         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
4985         gtk_adjustment_set_value (view->vadjustment, value);
4986
4987         return TRUE;
4988
4989 }
4990
4991 void
4992 ev_view_autoscroll_start (EvView *view)
4993 {
4994         gint x, y;
4995
4996         g_return_if_fail (EV_IS_VIEW (view));
4997
4998         if (view->scroll_info.autoscrolling)
4999                 return;
5000
5001         view->scroll_info.autoscrolling = TRUE;
5002         view->scroll_info.timeout_id =
5003                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5004                                view);
5005
5006         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5007         ev_view_handle_cursor_over_xy (view, x, y);
5008 }
5009
5010 void
5011 ev_view_autoscroll_stop (EvView *view)
5012 {
5013         gint x, y;
5014
5015         g_return_if_fail (EV_IS_VIEW (view));
5016
5017         if (!view->scroll_info.autoscrolling)
5018                 return;
5019
5020         view->scroll_info.autoscrolling = FALSE;
5021         if (view->scroll_info.timeout_id) {
5022                 g_source_remove (view->scroll_info.timeout_id);
5023                 view->scroll_info.timeout_id = 0;
5024         }
5025
5026         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5027         ev_view_handle_cursor_over_xy (view, x, y);
5028 }
5029
5030 void
5031 ev_view_set_document (EvView     *view,
5032                       EvDocument *document)
5033 {
5034         g_return_if_fail (EV_IS_VIEW (view));
5035
5036         view->loading = FALSE;
5037
5038         if (document != view->document) {
5039                 clear_caches (view);
5040
5041                 if (view->document) {
5042                         g_object_unref (view->document);
5043                         view->page_cache = NULL;
5044                 }
5045
5046                 view->document = document;
5047                 view->find_result = 0;
5048
5049                 if (view->document) {
5050                         g_object_ref (view->document);
5051                         setup_caches (view);
5052                 }
5053
5054                 view_update_range_and_current_page (view);
5055
5056                 gtk_widget_queue_resize (GTK_WIDGET (view));
5057         }
5058 }
5059
5060 static void
5061 ev_view_reload_page (EvView    *view,
5062                      gint       page,
5063                      GdkRegion *region)
5064 {
5065         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5066                                      region,
5067                                      page,
5068                                      view->rotation,
5069                                      view->scale);
5070 }
5071
5072 void
5073 ev_view_reload (EvView *view)
5074 {
5075         ev_pixbuf_cache_clear (view->pixbuf_cache);
5076         view_update_range_and_current_page (view);
5077 }
5078
5079 /*** Zoom and sizing mode ***/
5080
5081 #define EPSILON 0.0000001
5082 void
5083 ev_view_set_zoom (EvView   *view,
5084                   double    factor,
5085                   gboolean  relative)
5086 {
5087         double scale;
5088
5089         if (relative)
5090                 scale = view->scale * factor;
5091         else
5092                 scale = factor;
5093
5094         scale = CLAMP (scale,
5095                        view->sizing_mode == EV_SIZING_FREE ? view->min_scale : 0,
5096                        view->max_scale);
5097
5098         if (scale == view->scale)
5099                 return;
5100
5101         if (ABS (view->scale - scale) < EPSILON)
5102                 return;
5103
5104         if (view->loading_text) {
5105                 cairo_surface_destroy (view->loading_text);
5106                 view->loading_text = NULL;
5107         }
5108
5109         view->scale = scale;
5110         view->pending_resize = TRUE;
5111
5112         gtk_widget_queue_resize (GTK_WIDGET (view));
5113
5114         g_object_notify (G_OBJECT (view), "zoom");
5115 }
5116
5117 double
5118 ev_view_get_zoom (EvView *view)
5119 {
5120         return view->scale;
5121 }
5122
5123 void
5124 ev_view_set_screen_dpi (EvView  *view,
5125                         gdouble  dpi)
5126 {
5127         g_return_if_fail (EV_IS_VIEW (view));
5128         g_return_if_fail (dpi > 0);
5129
5130         view->dpi = dpi;
5131         view->min_scale = MIN_SCALE * dpi / 72.0;
5132         view->max_scale = MAX_SCALE * dpi / 72.0;
5133 }
5134
5135 gboolean
5136 ev_view_get_continuous (EvView *view)
5137 {
5138         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5139
5140         return view->continuous;
5141 }
5142
5143 void
5144 ev_view_set_continuous (EvView   *view,
5145                         gboolean  continuous)
5146 {
5147         g_return_if_fail (EV_IS_VIEW (view));
5148
5149         continuous = continuous != FALSE;
5150
5151         if (view->continuous != continuous) {
5152                 view->continuous = continuous;
5153                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5154                 gtk_widget_queue_resize (GTK_WIDGET (view));
5155         }
5156
5157         g_object_notify (G_OBJECT (view), "continuous");
5158 }
5159
5160 gboolean
5161 ev_view_get_dual_page (EvView *view)
5162 {
5163         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5164
5165         return view->dual_page;
5166 }
5167
5168 void
5169 ev_view_set_dual_page (EvView   *view,
5170                        gboolean  dual_page)
5171 {
5172         g_return_if_fail (EV_IS_VIEW (view));
5173
5174         dual_page = dual_page != FALSE;
5175
5176         if (view->dual_page == dual_page)
5177                 return;
5178
5179         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5180         view->dual_page = dual_page;
5181         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5182          * preload_cache_size to be 2 if dual_page is set.
5183          */
5184         gtk_widget_queue_resize (GTK_WIDGET (view));
5185
5186         g_object_notify (G_OBJECT (view), "dual-page");
5187 }
5188
5189 void
5190 ev_view_set_fullscreen (EvView   *view,
5191                          gboolean  fullscreen)
5192 {
5193         g_return_if_fail (EV_IS_VIEW (view));
5194
5195         fullscreen = fullscreen != FALSE;
5196
5197         if (view->fullscreen == fullscreen)
5198                 return;
5199
5200         view->fullscreen = fullscreen;
5201         gtk_widget_queue_resize (GTK_WIDGET (view));
5202
5203         g_object_notify (G_OBJECT (view), "fullscreen");
5204 }
5205
5206 gboolean
5207 ev_view_get_fullscreen (EvView *view)
5208 {
5209         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5210
5211         return view->fullscreen;
5212 }
5213
5214 void
5215 ev_view_set_presentation (EvView   *view,
5216                           gboolean  presentation)
5217 {
5218         g_return_if_fail (EV_IS_VIEW (view));
5219
5220         presentation = presentation != FALSE;
5221
5222         if (view->presentation == presentation)
5223                 return;
5224
5225         if (!presentation)
5226                 view->presentation_state = EV_PRESENTATION_NORMAL;
5227
5228         view->presentation = presentation;
5229         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5230
5231         if (presentation) {
5232                 view->sizing_mode_saved = view->sizing_mode;
5233                 view->scale_saved = view->scale;
5234                 ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
5235         } else {
5236                 ev_view_set_sizing_mode (view, view->sizing_mode_saved);
5237                 ev_view_set_zoom (view, view->scale_saved, FALSE);
5238         }
5239
5240         gtk_widget_queue_resize (GTK_WIDGET (view));
5241
5242         if (presentation)
5243                 ev_view_presentation_transition_start (view);
5244         else {
5245                 ev_view_presentation_transition_stop (view);
5246
5247                 if (view->animation) {
5248                         /* stop any running animation */
5249                         ev_view_transition_animation_cancel (view->animation, view);
5250                 }
5251         }
5252
5253         if (GTK_WIDGET_REALIZED (view)) {
5254                 if (view->presentation)
5255                         gdk_window_set_background (view->layout.bin_window,
5256                                                    &GTK_WIDGET (view)->style->black);
5257                 else
5258                         gdk_window_set_background (view->layout.bin_window,
5259                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
5260         }
5261
5262         g_object_notify (G_OBJECT (view), "presentation");
5263 }
5264
5265 gboolean
5266 ev_view_get_presentation (EvView *view)
5267 {
5268         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5269
5270         return view->presentation;
5271 }
5272
5273 static gboolean
5274 transition_next_page (EvView *view)
5275 {
5276         ev_view_next_page (view);
5277
5278         return FALSE;
5279 }
5280
5281 static void
5282 ev_view_presentation_transition_stop (EvView *view)
5283 {
5284         if (view->trans_timeout_id > 0)
5285                 g_source_remove (view->trans_timeout_id);
5286         view->trans_timeout_id = 0;
5287 }
5288
5289 static void
5290 ev_view_presentation_transition_start (EvView *view)
5291 {
5292         gdouble duration;
5293
5294         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
5295                 return;
5296
5297         ev_view_presentation_transition_stop (view);
5298
5299         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
5300                                                              view->current_page);
5301         if (duration > 0) {
5302                 view->trans_timeout_id =
5303                         g_timeout_add_seconds (duration,
5304                                                (GSourceFunc) transition_next_page,
5305                                                view);
5306         }
5307 }
5308
5309 void
5310 ev_view_set_sizing_mode (EvView       *view,
5311                          EvSizingMode  sizing_mode)
5312 {
5313         g_return_if_fail (EV_IS_VIEW (view));
5314
5315         if (view->sizing_mode == sizing_mode)
5316                 return;
5317
5318         view->sizing_mode = sizing_mode;
5319         gtk_widget_queue_resize (GTK_WIDGET (view));
5320
5321         g_object_notify (G_OBJECT (view), "sizing-mode");
5322 }
5323
5324 EvSizingMode
5325 ev_view_get_sizing_mode (EvView *view)
5326 {
5327         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
5328
5329         return view->sizing_mode;
5330 }
5331
5332 gboolean
5333 ev_view_can_zoom_in (EvView *view)
5334 {
5335         return view->scale * ZOOM_IN_FACTOR <= view->max_scale;
5336 }
5337
5338 gboolean
5339 ev_view_can_zoom_out (EvView *view)
5340 {
5341         return view->scale * ZOOM_OUT_FACTOR >= view->min_scale;
5342 }
5343
5344 void
5345 ev_view_zoom_in (EvView *view)
5346 {
5347         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5348
5349         if (view->presentation)
5350                 return;
5351
5352         view->pending_scroll = SCROLL_TO_CENTER;
5353         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
5354 }
5355
5356 void
5357 ev_view_zoom_out (EvView *view)
5358 {
5359         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5360
5361         if (view->presentation)
5362                 return;
5363
5364         view->pending_scroll = SCROLL_TO_CENTER;
5365         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
5366 }
5367
5368 void
5369 ev_view_rotate_right (EvView *view)
5370 {
5371         int rotation = view->rotation + 90;
5372
5373         if (rotation >= 360) {
5374                 rotation -= 360;
5375         }
5376
5377         ev_view_set_rotation (view, rotation);
5378 }
5379
5380 void
5381 ev_view_rotate_left (EvView *view)
5382 {
5383         int rotation = view->rotation - 90;
5384
5385         if (rotation < 0) {
5386                 rotation += 360;
5387         }
5388
5389         ev_view_set_rotation (view, rotation);
5390 }
5391
5392 void
5393 ev_view_set_rotation (EvView *view, int rotation)
5394 {
5395         view->rotation = rotation;
5396
5397         if (view->pixbuf_cache) {
5398                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5399                 gtk_widget_queue_resize (GTK_WIDGET (view));
5400         }
5401
5402         if (rotation != 0)
5403                 clear_selection (view);
5404
5405         g_object_notify (G_OBJECT (view), "rotation");
5406 }
5407
5408 int
5409 ev_view_get_rotation (EvView *view)
5410 {
5411         return view->rotation;
5412 }
5413
5414 static double
5415 zoom_for_size_fit_width (gdouble doc_width,
5416                          gdouble doc_height,
5417                          int     target_width,
5418                          int     target_height,
5419                          int     vsb_width)
5420 {
5421         double scale;
5422
5423         scale = (double)target_width / doc_width;
5424
5425         if (doc_height * scale > target_height)
5426                 scale = (double) (target_width - vsb_width) / doc_width;
5427
5428         return scale;
5429 }
5430
5431 static double
5432 zoom_for_size_fit_height (gdouble doc_width,
5433                           gdouble doc_height,
5434                           int     target_width,
5435                           int     target_height,
5436                           int     vsb_height)
5437 {
5438         double scale;
5439
5440         scale = (double)target_height / doc_height;
5441
5442         if (doc_width * scale > target_width)
5443                 scale = (double) (target_height - vsb_height) / doc_height;
5444
5445         return scale;
5446 }
5447
5448 static double
5449 zoom_for_size_best_fit (gdouble doc_width,
5450                         gdouble doc_height,
5451                         int     target_width,
5452                         int     target_height,
5453                         int     vsb_width,
5454                         int     hsb_width)
5455 {
5456         double w_scale;
5457         double h_scale;
5458
5459         w_scale = (double)target_width / doc_width;
5460         h_scale = (double)target_height / doc_height;
5461
5462         if (doc_height * w_scale > target_height)
5463                 w_scale = (double) (target_width - vsb_width) / doc_width;
5464         if (doc_width * h_scale > target_width)
5465                 h_scale = (double) (target_height - hsb_width) / doc_height;
5466
5467         return MIN (w_scale, h_scale);
5468 }
5469
5470
5471 static void
5472 ev_view_zoom_for_size_presentation (EvView *view,
5473                                     int     width,
5474                                     int     height)
5475 {
5476         gdouble doc_width, doc_height;
5477         gdouble scale;
5478
5479         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5480         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
5481         ev_view_set_zoom (view, scale, FALSE);
5482 }
5483
5484 static void
5485 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5486                            int     width,
5487                            int     height,
5488                            int     vsb_width,
5489                            int     hsb_height)
5490 {
5491         gdouble doc_width, doc_height;
5492         GtkBorder border;
5493         gdouble scale;
5494
5495         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5496         if (view->rotation == 90 || view->rotation == 270) {
5497                 gdouble tmp;
5498
5499                 tmp = doc_width;
5500                 doc_width = doc_height;
5501                 doc_height = tmp;
5502         }
5503
5504         compute_border (view, doc_width, doc_height, &border);
5505
5506         doc_width *= 2;
5507         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5508         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5509
5510         /* FIXME: We really need to calculate the overall height here, not the
5511          * page height.  We assume there's always a vertical scrollbar for
5512          * now.  We need to fix this. */
5513         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5514                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
5515         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5516                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
5517         else
5518                 g_assert_not_reached ();
5519
5520         ev_view_set_zoom (view, scale, FALSE);
5521 }
5522
5523 static void
5524 ev_view_zoom_for_size_continuous (EvView *view,
5525                                   int     width,
5526                                   int     height,
5527                                   int     vsb_width,
5528                                   int     hsb_height)
5529 {
5530         gdouble doc_width, doc_height;
5531         GtkBorder border;
5532         gdouble scale;
5533
5534         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5535         if (view->rotation == 90 || view->rotation == 270) {
5536                 gdouble tmp;
5537
5538                 tmp = doc_width;
5539                 doc_width = doc_height;
5540                 doc_height = tmp;
5541         }
5542
5543         compute_border (view, doc_width, doc_height, &border);
5544
5545         width -= (border.left + border.right + 2 * view->spacing);
5546         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5547
5548         /* FIXME: We really need to calculate the overall height here, not the
5549          * page height.  We assume there's always a vertical scrollbar for
5550          * now.  We need to fix this. */
5551         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5552                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
5553         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5554                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
5555         else
5556                 g_assert_not_reached ();
5557
5558         ev_view_set_zoom (view, scale, FALSE);
5559 }
5560
5561 static void
5562 ev_view_zoom_for_size_dual_page (EvView *view,
5563                                  int     width,
5564                                  int     height,
5565                                  int     vsb_width,
5566                                  int     hsb_height)
5567 {
5568         GtkBorder border;
5569         gdouble doc_width, doc_height;
5570         gdouble scale;
5571         gint other_page;
5572
5573         other_page = view->current_page ^ 1;
5574
5575         /* Find the largest of the two. */
5576         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5577         if (other_page < ev_document_get_n_pages (view->document)) {
5578                 gdouble width_2, height_2;
5579
5580                 get_doc_page_size (view, other_page, &width_2, &height_2);
5581                 if (width_2 > doc_width)
5582                         doc_width = width_2;
5583                 if (height_2 > doc_height)
5584                         doc_height = height_2;
5585         }
5586         compute_border (view, width, height, &border);
5587
5588         doc_width = doc_width * 2;
5589         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5590         height -= (border.top + border.bottom + 2 * view->spacing);
5591
5592         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5593                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
5594         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5595                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
5596         else
5597                 g_assert_not_reached ();
5598
5599         ev_view_set_zoom (view, scale, FALSE);
5600 }
5601
5602 static void
5603 ev_view_zoom_for_size_single_page (EvView *view,
5604                                    int     width,
5605                                    int     height,
5606                                    int     vsb_width,
5607                                    int     hsb_height)
5608 {
5609         gdouble doc_width, doc_height;
5610         GtkBorder border;
5611         gdouble scale;
5612
5613         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5614
5615         /* Get an approximate border */
5616         compute_border (view, width, height, &border);
5617
5618         width -= (border.left + border.right + 2 * view->spacing);
5619         height -= (border.top + border.bottom + 2 * view->spacing);
5620
5621         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5622                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
5623         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5624                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
5625         else
5626                 g_assert_not_reached ();
5627
5628         ev_view_set_zoom (view, scale, FALSE);
5629 }
5630
5631 void
5632 ev_view_set_zoom_for_size (EvView *view,
5633                            int     width,
5634                            int     height,
5635                            int     vsb_width,
5636                            int     hsb_height)
5637 {
5638         g_return_if_fail (EV_IS_VIEW (view));
5639         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5640                           view->sizing_mode == EV_SIZING_BEST_FIT);
5641         g_return_if_fail (width >= 0);
5642         g_return_if_fail (height >= 0);
5643
5644         if (view->document == NULL)
5645                 return;
5646
5647         if (view->presentation)
5648                 ev_view_zoom_for_size_presentation (view, width, height);
5649         else if (view->continuous && view->dual_page)
5650                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
5651         else if (view->continuous)
5652                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
5653         else if (view->dual_page)
5654                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
5655         else
5656                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
5657 }
5658
5659 /*** Find ***/
5660 static gint
5661 ev_view_find_get_n_results (EvView *view, gint page)
5662 {
5663         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5664 }
5665
5666 static EvRectangle *
5667 ev_view_find_get_result (EvView *view, gint page, gint result)
5668 {
5669         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5670 }
5671
5672 static void
5673 jump_to_find_result (EvView *view)
5674 {
5675         gint n_results;
5676         gint page = view->current_page;
5677
5678         n_results = ev_view_find_get_n_results (view, page);
5679
5680         if (n_results > 0 && view->find_result < n_results) {
5681                 EvRectangle *rect;
5682                 GdkRectangle view_rect;
5683
5684                 rect = ev_view_find_get_result (view, page, view->find_result);
5685                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5686                 ensure_rectangle_is_visible (view, &view_rect);
5687                 view->jump_to_find_result = FALSE;
5688         }
5689 }
5690
5691 /**
5692  * jump_to_find_page
5693  * @view: #EvView instance
5694  * @direction: Direction to look
5695  * @shift: Shift from current page
5696  *
5697  * Jumps to the first page that has occurences of searched word.
5698  * Uses a direction where to look and a shift from current page.
5699  *
5700  */
5701 static void
5702 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5703 {
5704         int n_pages, i;
5705
5706         n_pages = ev_document_get_n_pages (view->document);
5707
5708         for (i = 0; i < n_pages; i++) {
5709                 int page;
5710
5711                 if (direction == EV_VIEW_FIND_NEXT)
5712                         page = view->current_page + i;
5713                 else
5714                         page = view->current_page - i;
5715                 page += shift;
5716
5717                 if (page >= n_pages) {
5718                         page = page - n_pages;
5719                 } else if (page < 0)
5720                         page = page + n_pages;
5721
5722                 if (ev_view_find_get_n_results (view, page) > 0) {
5723                         ev_page_cache_set_current_page (view->page_cache, page);
5724                         break;
5725                 }
5726         }
5727 }
5728
5729 void
5730 ev_view_find_changed (EvView *view, GList **results, gint page)
5731 {
5732         view->find_pages = results;
5733
5734         if (view->jump_to_find_result == TRUE) {
5735                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5736                 jump_to_find_result (view);
5737         }
5738
5739         if (view->current_page == page)
5740                 gtk_widget_queue_draw (GTK_WIDGET (view));
5741 }
5742
5743 void
5744 ev_view_find_next (EvView *view)
5745 {
5746         gint n_results;
5747
5748         n_results = ev_view_find_get_n_results (view, view->current_page);
5749         view->find_result++;
5750
5751         if (view->find_result >= n_results) {
5752                 view->find_result = 0;
5753                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5754                 jump_to_find_result (view);
5755         } else {
5756                 jump_to_find_result (view);
5757                 gtk_widget_queue_draw (GTK_WIDGET (view));
5758         }
5759 }
5760
5761 void
5762 ev_view_find_previous (EvView *view)
5763 {
5764         view->find_result--;
5765
5766         if (view->find_result < 0) {
5767                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5768                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5769                 jump_to_find_result (view);
5770         } else {
5771                 jump_to_find_result (view);
5772                 gtk_widget_queue_draw (GTK_WIDGET (view));
5773         }
5774 }
5775
5776 void
5777 ev_view_find_search_changed (EvView *view)
5778 {
5779         /* search string has changed, focus on new search result */
5780         view->jump_to_find_result = TRUE;
5781         view->find_pages = NULL;
5782 }
5783
5784 void
5785 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5786 {
5787         view->highlight_find_results = value;
5788         gtk_widget_queue_draw (GTK_WIDGET (view));
5789 }
5790
5791 void
5792 ev_view_find_cancel (EvView *view)
5793 {
5794         view->find_pages = NULL;
5795 }
5796
5797 /*** Selections ***/
5798
5799 /* compute_new_selection_rect/text calculates the area currently selected by
5800  * view_rect.  each handles a different mode;
5801  */
5802 static GList *
5803 compute_new_selection_rect (EvView       *view,
5804                             GdkPoint     *start,
5805                             GdkPoint     *stop)
5806 {
5807         GdkRectangle view_rect;
5808         int n_pages, i;
5809         GList *list = NULL;
5810
5811         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5812
5813         view_rect.x = MIN (start->x, stop->x);
5814         view_rect.y = MIN (start->y, stop->y);
5815         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5816         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5817
5818         n_pages = ev_document_get_n_pages (view->document);
5819
5820         for (i = 0; i < n_pages; i++) {
5821                 GdkRectangle page_area;
5822                 GtkBorder border;
5823
5824                 if (get_page_extents (view, i, &page_area, &border)) {
5825                         GdkRectangle overlap;
5826
5827                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5828                                 EvViewSelection *selection;
5829
5830                                 selection = g_new0 (EvViewSelection, 1);
5831                                 selection->page = i;
5832                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5833                                                        &(selection->rect));
5834
5835                                 list = g_list_append (list, selection);
5836                         }
5837                 }
5838         }
5839
5840         return list;
5841 }
5842
5843 static gboolean
5844 gdk_rectangle_point_in (GdkRectangle *rectangle,
5845                         GdkPoint     *point)
5846 {
5847         return rectangle->x <= point->x &&
5848                 rectangle->y <= point->y &&
5849                 point->x < rectangle->x + rectangle->width &&
5850                 point->y < rectangle->y + rectangle->height;
5851 }
5852
5853 static GList *
5854 compute_new_selection_text (EvView          *view,
5855                             EvSelectionStyle style,
5856                             GdkPoint        *start,
5857                             GdkPoint        *stop)
5858 {
5859         int n_pages, i, first, last;
5860         GList *list = NULL;
5861         EvViewSelection *selection;
5862         gdouble width, height;
5863         int start_page, end_page;
5864
5865         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5866
5867         n_pages = ev_document_get_n_pages (view->document);
5868
5869         /* First figure out the range of pages the selection
5870          * affects. */
5871         first = n_pages;
5872         last = 0;
5873         if (view->continuous) {
5874                 start_page = 0;
5875                 end_page = n_pages;
5876         } else if (view->dual_page) {
5877                 start_page = view->start_page;
5878                 end_page = view->end_page + 1;
5879         } else {
5880                 start_page = view->current_page;
5881                 end_page = view->current_page + 1;
5882         }
5883
5884         for (i = start_page; i < end_page; i++) {
5885                 GdkRectangle page_area;
5886                 GtkBorder border;
5887
5888                 get_page_extents (view, i, &page_area, &border);
5889                 if (gdk_rectangle_point_in (&page_area, start) ||
5890                     gdk_rectangle_point_in (&page_area, stop)) {
5891                         if (first == n_pages)
5892                                 first = i;
5893                         last = i;
5894                 }
5895
5896         }
5897
5898         /* Now create a list of EvViewSelection's for the affected
5899          * pages.  This could be an empty list, a list of just one
5900          * page or a number of pages.*/
5901         for (i = first; i < last + 1; i++) {
5902                 GdkRectangle page_area;
5903                 GtkBorder border;
5904                 GdkPoint *point;
5905
5906                 get_doc_page_size (view, i, &width, &height);
5907
5908                 selection = g_new0 (EvViewSelection, 1);
5909                 selection->page = i;
5910                 selection->style = style;
5911                 selection->rect.x1 = selection->rect.y1 = 0;
5912                 selection->rect.x2 = width;
5913                 selection->rect.y2 = height;
5914
5915                 get_page_extents (view, i, &page_area, &border);
5916
5917                 if (gdk_rectangle_point_in (&page_area, start))
5918                         point = start;
5919                 else
5920                         point = stop;
5921
5922                 if (i == first)
5923                         view_point_to_doc_point (view, point, &page_area,
5924                                                  &selection->rect.x1,
5925                                                  &selection->rect.y1);
5926
5927                 /* If the selection is contained within just one page,
5928                  * make sure we don't write 'start' into both points
5929                  * in selection->rect. */
5930                 if (first == last)
5931                         point = stop;
5932
5933                 if (i == last)
5934                         view_point_to_doc_point (view, point, &page_area,
5935                                                  &selection->rect.x2,
5936                                                  &selection->rect.y2);
5937
5938                 list = g_list_append (list, selection);
5939         }
5940
5941         return list;
5942 }
5943
5944 /* This function takes the newly calculated list, and figures out which regions
5945  * have changed.  It then queues a redraw approporiately.
5946  */
5947 static void
5948 merge_selection_region (EvView *view,
5949                         GList  *new_list)
5950 {
5951         GList *old_list;
5952         GList *new_list_ptr, *old_list_ptr;
5953
5954         /* Update the selection */
5955         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5956         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5957         g_list_free (view->selection_info.selections);
5958         view->selection_info.selections = new_list;
5959         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5960         g_object_notify (G_OBJECT (view), "has-selection");
5961
5962         new_list_ptr = new_list;
5963         old_list_ptr = old_list;
5964
5965         while (new_list_ptr || old_list_ptr) {
5966                 EvViewSelection *old_sel, *new_sel;
5967                 int cur_page;
5968                 GdkRegion *region = NULL;
5969
5970                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5971                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5972
5973                 /* Assume that the lists are in order, and we run through them
5974                  * comparing them, one page at a time.  We come out with the
5975                  * first page we see. */
5976                 if (new_sel && old_sel) {
5977                         if (new_sel->page < old_sel->page) {
5978                                 new_list_ptr = new_list_ptr->next;
5979                                 old_sel = NULL;
5980                         } else if (new_sel->page > old_sel->page) {
5981                                 old_list_ptr = old_list_ptr->next;
5982                                 new_sel = NULL;
5983                         } else {
5984                                 new_list_ptr = new_list_ptr->next;
5985                                 old_list_ptr = old_list_ptr->next;
5986                         }
5987                 } else if (new_sel) {
5988                         new_list_ptr = new_list_ptr->next;
5989                 } else if (old_sel) {
5990                         old_list_ptr = old_list_ptr->next;
5991                 }
5992
5993                 g_assert (new_sel || old_sel);
5994
5995                 /* is the page we're looking at on the screen?*/
5996                 cur_page = new_sel ? new_sel->page : old_sel->page;
5997                 if (cur_page < view->start_page || cur_page > view->end_page)
5998                         continue;
5999
6000                 /* seed the cache with a new page.  We are going to need the new
6001                  * region too. */
6002                 if (new_sel) {
6003                         GdkRegion *tmp_region = NULL;
6004
6005                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
6006                                                                cur_page,
6007                                                                view->scale,
6008                                                                &tmp_region);
6009
6010                         if (tmp_region) {
6011                                 new_sel->covered_region = gdk_region_copy (tmp_region);
6012                         }
6013                 }
6014
6015                 /* Now we figure out what needs redrawing */
6016                 if (old_sel && new_sel) {
6017                         if (old_sel->covered_region && new_sel->covered_region) {
6018                                 /* We only want to redraw the areas that have
6019                                  * changed, so we xor the old and new regions
6020                                  * and redraw if it's different */
6021                                 region = gdk_region_copy (old_sel->covered_region);
6022                                 gdk_region_xor (region, new_sel->covered_region);
6023                                 if (gdk_region_empty (region)) {
6024                                         gdk_region_destroy (region);
6025                                         region = NULL;
6026                                 }
6027                         } else if (old_sel->covered_region) {
6028                                 region = gdk_region_copy (old_sel->covered_region);
6029                         } else if (new_sel->covered_region) {
6030                                 region = gdk_region_copy (new_sel->covered_region);
6031                         }
6032                 } else if (old_sel && !new_sel) {
6033                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
6034                                 region = gdk_region_copy (old_sel->covered_region);
6035                         }
6036                 } else if (!old_sel && new_sel) {
6037                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
6038                                 region = gdk_region_copy (new_sel->covered_region);
6039                         }
6040                 } else {
6041                         g_assert_not_reached ();
6042                 }
6043
6044                 /* Redraw the damaged region! */
6045                 if (region) {
6046                         GdkRectangle page_area;
6047                         GtkBorder border;
6048
6049                         /* I don't know why but the region is smaller
6050                          * than expected. This hack fixes it, I guess
6051                          * 10 pixels more won't hurt
6052                          */
6053                         gdk_region_shrink (region, -5, -5);
6054
6055                         get_page_extents (view, cur_page, &page_area, &border);
6056                         gdk_region_offset (region,
6057                                            page_area.x + border.left - view->scroll_x,
6058                                            page_area.y + border.top - view->scroll_y);
6059                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
6060                         gdk_region_destroy (region);
6061                 }
6062         }
6063
6064         /* Free the old list, now that we're done with it. */
6065         g_list_foreach (old_list, (GFunc) selection_free, NULL);
6066         g_list_free (old_list);
6067 }
6068
6069 static void
6070 compute_selections (EvView          *view,
6071                     EvSelectionStyle style,
6072                     GdkPoint        *start,
6073                     GdkPoint        *stop)
6074 {
6075         GList *list;
6076
6077         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
6078                 list = compute_new_selection_rect (view, start, stop);
6079         else
6080                 list = compute_new_selection_text (view, style, start, stop);
6081         merge_selection_region (view, list);
6082 }
6083
6084 /* Free's the selection.  It's up to the caller to queue redraws if needed.
6085  */
6086 static void
6087 selection_free (EvViewSelection *selection)
6088 {
6089         if (selection->covered_region)
6090                 gdk_region_destroy (selection->covered_region);
6091         g_free (selection);
6092 }
6093
6094 static void
6095 clear_selection (EvView *view)
6096 {
6097         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6098         g_list_free (view->selection_info.selections);
6099         view->selection_info.selections = NULL;
6100         view->selection_info.in_selection = FALSE;
6101         if (view->pixbuf_cache)
6102                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6103         g_object_notify (G_OBJECT (view), "has-selection");
6104 }
6105
6106 void
6107 ev_view_select_all (EvView *view)
6108 {
6109         GList *selections = NULL;
6110         int n_pages, i;
6111
6112         /* Disable selection on rotated pages for the 0.4.0 series */
6113         if (view->rotation != 0)
6114                 return;
6115
6116         clear_selection (view);
6117
6118         n_pages = ev_document_get_n_pages (view->document);
6119         for (i = 0; i < n_pages; i++) {
6120                 gdouble width, height;
6121                 EvViewSelection *selection;
6122
6123                 get_doc_page_size (view, i, &width, &height);
6124
6125                 selection = g_new0 (EvViewSelection, 1);
6126                 selection->page = i;
6127                 selection->style = EV_SELECTION_STYLE_GLYPH;
6128                 selection->rect.x1 = selection->rect.y1 = 0;
6129                 selection->rect.x2 = width;
6130                 selection->rect.y2 = height;
6131
6132                 selections = g_list_append (selections, selection);
6133         }
6134
6135         merge_selection_region (view, selections);
6136         gtk_widget_queue_draw (GTK_WIDGET (view));
6137 }
6138
6139 gboolean
6140 ev_view_get_has_selection (EvView *view)
6141 {
6142         return view->selection_info.selections != NULL;
6143 }
6144
6145 static char *
6146 get_selected_text (EvView *view)
6147 {
6148         GString *text;
6149         GList *l;
6150         gchar *normalized_text;
6151         EvRenderContext *rc;
6152
6153         text = g_string_new (NULL);
6154         rc = ev_render_context_new (NULL, view->rotation, view->scale);
6155
6156         ev_document_doc_mutex_lock ();
6157
6158         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6159                 EvViewSelection *selection = (EvViewSelection *)l->data;
6160                 EvPage *page;
6161                 gchar *tmp;
6162
6163                 page = ev_document_get_page (view->document, selection->page);
6164                 ev_render_context_set_page (rc, page);
6165                 g_object_unref (page);
6166
6167                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6168                                                       rc, selection->style,
6169                                                       &(selection->rect));
6170
6171                 g_string_append (text, tmp);
6172                 g_free (tmp);
6173         }
6174
6175         g_object_unref (rc);
6176
6177         ev_document_doc_mutex_unlock ();
6178
6179         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6180         g_string_free (text, TRUE);
6181         return normalized_text;
6182 }
6183
6184 static void
6185 ev_view_clipboard_copy (EvView      *view,
6186                         const gchar *text)
6187 {
6188         GtkClipboard *clipboard;
6189
6190         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6191                                               GDK_SELECTION_CLIPBOARD);
6192         gtk_clipboard_set_text (clipboard, text, -1);
6193 }
6194
6195 void
6196 ev_view_copy (EvView *ev_view)
6197 {
6198         char *text;
6199
6200         if (!EV_IS_SELECTION (ev_view->document))
6201                 return;
6202
6203         text = get_selected_text (ev_view);
6204         ev_view_clipboard_copy (ev_view, text);
6205         g_free (text);
6206 }
6207
6208 static void
6209 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6210                         GtkSelectionData *selection_data,
6211                         guint             info,
6212                         gpointer          data)
6213 {
6214         EvView *ev_view = EV_VIEW (data);
6215
6216         if (ev_view->link_selected) {
6217                 gtk_selection_data_set_text (selection_data,
6218                                              ev_link_action_get_uri (ev_view->link_selected),
6219                                              -1);
6220         } else if (EV_IS_SELECTION (ev_view->document) &&
6221                    ev_view->selection_info.selections) {
6222                 gchar *text;
6223
6224                 text = get_selected_text (ev_view);
6225                 if (text) {
6226                         gtk_selection_data_set_text (selection_data, text, -1);
6227                         g_free (text);
6228                 }
6229         }
6230 }
6231
6232 static void
6233 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6234                           gpointer      data)
6235 {
6236         EvView *view = EV_VIEW (data);
6237
6238         clear_selection (view);
6239         clear_link_selected (view);
6240 }
6241
6242 static void
6243 ev_view_update_primary_selection (EvView *ev_view)
6244 {
6245         GtkClipboard *clipboard;
6246
6247         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6248                                               GDK_SELECTION_PRIMARY);
6249
6250         if (ev_view->selection_info.selections || ev_view->link_selected) {
6251                 GtkTargetList *target_list;
6252                 GtkTargetEntry *targets;
6253                 int n_targets;
6254
6255                 target_list = gtk_target_list_new (NULL, 0);
6256                 gtk_target_list_add_text_targets (target_list, 0);
6257                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6258                 gtk_target_list_unref (target_list);
6259
6260                 if (!gtk_clipboard_set_with_owner (clipboard,
6261                                                    targets, n_targets,
6262                                                    ev_view_primary_get_cb,
6263                                                    ev_view_primary_clear_cb,
6264                                                    G_OBJECT (ev_view)))
6265                         ev_view_primary_clear_cb (clipboard, ev_view);
6266
6267                 gtk_target_table_free (targets, n_targets);
6268         } else {
6269                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6270                         gtk_clipboard_clear (clipboard);
6271         }
6272 }
6273
6274 static void
6275 clear_link_selected (EvView *view)
6276 {
6277         if (view->link_selected) {
6278                 g_object_unref (view->link_selected);
6279                 view->link_selected = NULL;
6280         }
6281 }
6282
6283 void
6284 ev_view_copy_link_address (EvView       *view,
6285                            EvLinkAction *action)
6286 {
6287         clear_link_selected (view);
6288
6289         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6290
6291         view->link_selected = g_object_ref (action);
6292         ev_view_update_primary_selection (view);
6293 }
6294
6295 /*** Cursor operations ***/
6296
6297 static GdkCursor *
6298 ev_view_create_invisible_cursor(void)
6299 {
6300        GdkBitmap *empty;
6301        GdkColor black = { 0, 0, 0, 0 };
6302        static char bits[] = { 0x00 };
6303
6304        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
6305
6306        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
6307 }
6308
6309 static void
6310 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6311 {
6312         GdkCursor *cursor = NULL;
6313         GdkDisplay *display;
6314         GtkWidget *widget;
6315
6316         if (view->cursor == new_cursor) {
6317                 return;
6318         }
6319
6320         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6321         display = gtk_widget_get_display (widget);
6322         view->cursor = new_cursor;
6323
6324         switch (new_cursor) {
6325                 case EV_VIEW_CURSOR_NORMAL:
6326                         gdk_window_set_cursor (view->layout.bin_window, NULL);
6327                         break;
6328                 case EV_VIEW_CURSOR_IBEAM:
6329                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
6330                         break;
6331                 case EV_VIEW_CURSOR_LINK:
6332                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
6333                         break;
6334                 case EV_VIEW_CURSOR_WAIT:
6335                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
6336                         break;
6337                 case EV_VIEW_CURSOR_HIDDEN:
6338                         cursor = ev_view_create_invisible_cursor ();
6339                         break;
6340                 case EV_VIEW_CURSOR_DRAG:
6341                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
6342                         break;
6343                 case EV_VIEW_CURSOR_AUTOSCROLL:
6344                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
6345                         break;
6346         }
6347
6348         if (cursor) {
6349                 gdk_window_set_cursor (view->layout.bin_window, cursor);
6350                 gdk_cursor_unref (cursor);
6351                 gdk_flush();
6352         }
6353 }
6354
6355 void
6356 ev_view_hide_cursor (EvView *view)
6357 {
6358        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6359 }
6360
6361 void
6362 ev_view_show_cursor (EvView *view)
6363 {
6364        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6365 }
6366
6367 static void
6368 ev_view_reset_presentation_state (EvView *view)
6369 {
6370         if (!view->presentation ||
6371             view->presentation_state == EV_PRESENTATION_NORMAL)
6372                 return;
6373
6374         view->presentation_state = EV_PRESENTATION_NORMAL;
6375         gdk_window_set_background (view->layout.bin_window,
6376                                    &GTK_WIDGET (view)->style->black);
6377         gtk_widget_queue_draw (GTK_WIDGET (view));
6378 }
6379
6380 gboolean
6381 ev_view_next_page (EvView *view)
6382 {
6383         int page, n_pages;
6384
6385         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6386
6387         if (!view->page_cache)
6388                 return FALSE;
6389
6390         if (view->presentation &&
6391             (view->presentation_state == EV_PRESENTATION_BLACK ||
6392              view->presentation_state == EV_PRESENTATION_WHITE)) {
6393                 ev_view_reset_presentation_state (view);
6394                 return FALSE;
6395         }
6396
6397         if (view->animation) {
6398                 ev_view_transition_animation_cancel (view->animation, view);
6399         }
6400
6401         ev_view_presentation_transition_stop (view);
6402         ev_view_reset_presentation_state (view);
6403
6404         page = ev_page_cache_get_current_page (view->page_cache);
6405         n_pages = ev_document_get_n_pages (view->document);
6406
6407         if (view->dual_page && !view->presentation)
6408                 page = page + 2;
6409         else
6410                 page = page + 1;
6411
6412         if (page < n_pages) {
6413                 ev_page_cache_set_current_page (view->page_cache, page);
6414                 return TRUE;
6415         } else if (view->presentation && page == n_pages) {
6416                 view->presentation_state = EV_PRESENTATION_END;
6417                 gtk_widget_queue_draw (GTK_WIDGET (view));
6418                 return TRUE;
6419         } else if (view->dual_page && page == n_pages) {
6420                 ev_page_cache_set_current_page (view->page_cache, page - 1);
6421                 return TRUE;
6422         } else {
6423                 return FALSE;
6424         }
6425 }
6426
6427 gboolean
6428 ev_view_previous_page (EvView *view)
6429 {
6430         int page;
6431
6432         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6433
6434         if (!view->page_cache)
6435                 return FALSE;
6436
6437         if (view->presentation &&
6438             view->presentation_state == EV_PRESENTATION_END) {
6439                 ev_view_reset_presentation_state (view);
6440                 return TRUE;
6441         }
6442
6443         if (view->presentation &&
6444             (view->presentation_state == EV_PRESENTATION_BLACK ||
6445              view->presentation_state == EV_PRESENTATION_WHITE)) {
6446                 ev_view_reset_presentation_state (view);
6447                 return FALSE;
6448         }
6449
6450         if (view->animation) {
6451                 ev_view_transition_animation_cancel (view->animation, view);
6452         }
6453
6454         ev_view_reset_presentation_state (view);
6455
6456         page = ev_page_cache_get_current_page (view->page_cache);
6457
6458         if (view->dual_page && !view->presentation)
6459                 page = page - 2;
6460         else
6461                 page = page - 1;
6462
6463         if (page >= 0) {
6464                 ev_page_cache_set_current_page (view->page_cache, page);
6465                 return TRUE;
6466         } else if (ev_view_get_dual_page (view) && page == -1) {
6467                 ev_page_cache_set_current_page (view->page_cache, 0);
6468                 return TRUE;
6469         } else {
6470                 return FALSE;
6471         }
6472 }
6473