shell/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 #include <glib/gi18n.h>
  27 #include <gtk/gtk.h>
  28 #include <gdk/gdkkeysyms.h>
  29
  30 #include "ev-marshal.h"
  31 #include "ev-view.h"
  32 #include "ev-view-private.h"
  33 #include "ev-utils.h"
  34 #include "ev-document-links.h"
  35 #include "ev-document-images.h"
  36 #include "ev-document-find.h"
  37 #include "ev-document-transition.h"
  38 #include "ev-document-forms.h"
  39 #include "ev-document-misc.h"
  40 #include "ev-page-cache.h"
  41 #include "ev-pixbuf-cache.h"
  42 #include "ev-transition-animation.h"
  43 #if !GTK_CHECK_VERSION (2, 11, 7)
  44 #include "ev-tooltip.h"
  45 #endif
  46 #include "ev-application.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
  53 enum {
  54         PROP_0,
  55         PROP_FIND_STATUS,
  56         PROP_CONTINUOUS,
  57         PROP_DUAL_PAGE,
  58         PROP_FULLSCREEN,
  59         PROP_PRESENTATION,
  60         PROP_SIZING_MODE,
  61         PROP_ZOOM,
  62         PROP_ROTATION,
  63         PROP_HAS_SELECTION,
  64 };
  65
  66 enum {
  67         SIGNAL_BINDING_ACTIVATED,
  68         SIGNAL_ZOOM_INVALID,
  69         SIGNAL_HANDLE_LINK,
  70         SIGNAL_EXTERNAL_LINK,
  71         SIGNAL_POPUP_MENU,
  72         N_SIGNALS,
  73 };
  74
  75 enum {
  76         TARGET_DND_URI,
  77         TARGET_DND_TEXT,
  78         TARGET_DND_IMAGE
  79 };
  80
  81 enum {
  82         TARGET_STRING,
  83         TARGET_TEXT,
  84         TARGET_COMPOUND_TEXT,
  85         TARGET_UTF8_STRING,
  86         TARGET_TEXT_BUFFER_CONTENTS
  87 };
  88
  89 static const GtkTargetEntry clipboard_targets[] = {
  90         { "STRING", 0, TARGET_STRING },
  91         { "TEXT",   0, TARGET_TEXT },
  92         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  93         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  94 };
  95
  96 static const GtkTargetEntry view_drop_targets[] = {
  97         { "text/uri-list", 0, 0 }
  98 };
  99
 100 static guint signals[N_SIGNALS];
 101
 102 typedef enum {
 103         EV_VIEW_FIND_NEXT,
 104         EV_VIEW_FIND_PREV
 105 } EvViewFindDirection;
 106
 107 #define ZOOM_IN_FACTOR  1.2
 108 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
 109
 110 #define MIN_SCALE 0.05409
 111 #define MAX_SCALE 4.0
 112
 113 #define SCROLL_TIME 150
 114
 115 /*** Scrolling ***/
 116 static void       scroll_to_current_page                     (EvView *view,
 117                                                               GtkOrientation orientation);
 118 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
 119                                                               GtkAdjustment      *hadjustment,
 120                                                               GtkAdjustment      *vadjustment);
 121 static void       view_update_range_and_current_page         (EvView             *view);
 122 static void       set_scroll_adjustment                      (EvView             *view,
 123                                                               GtkOrientation      orientation,
 124                                                               GtkAdjustment      *adjustment);
 125 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 126                                                               guint               keyval,
 127                                                               GdkModifierType modifiers,
 128                                                               EvScrollType       scroll,
 129                                                               gboolean            horizontal);
 130 static void       ensure_rectangle_is_visible                (EvView             *view,
 131                                                               GdkRectangle       *rect);
 132
 133 /*** Geometry computations ***/
 134 static void       compute_border                             (EvView             *view,
 135                                                               int                 width,
 136                                                               int                 height,
 137                                                               GtkBorder          *border);
 138 static void       get_page_y_offset                          (EvView *view,
 139                                                               int page,
 140                                                               double zoom,
 141                                                               int *y_offset);
 142 static gboolean   get_page_extents                           (EvView             *view,
 143                                                               gint                page,
 144                                                               GdkRectangle       *page_area,
 145                                                               GtkBorder          *border);
 146 static void       view_rect_to_doc_rect                      (EvView             *view,
 147                                                               GdkRectangle       *view_rect,
 148                                                               GdkRectangle       *page_area,
 149                                                               EvRectangle        *doc_rect);
 150 static void       doc_rect_to_view_rect                      (EvView             *view,
 151                                                               int                 page,
 152                                                               EvRectangle        *doc_rect,
 153                                                               GdkRectangle       *view_rect);
 154 static void       find_page_at_location                      (EvView             *view,
 155                                                               gdouble             x,
 156                                                               gdouble             y,
 157                                                               gint               *page,
 158                                                               gint               *x_offset,
 159                                                               gint               *y_offset);
 160 static gboolean  doc_point_to_view_point                     (EvView             *view,
 161                                                               int                 page,
 162                                                               EvPoint            *doc_point,
 163                                                               GdkPoint           *view_point);
 164 /*** Hyperrefs ***/
 165 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 166                                                               gdouble             x,
 167                                                               gdouble             y);
 168 static char*      tip_from_link                              (EvView             *view,
 169                                                               EvLink             *link);
 170 /*** Forms ***/
 171 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 172                                                                gdouble            x,
 173                                                                gdouble            y);
 174
 175 /*** GtkWidget implementation ***/
 176 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 177                                                               GtkRequisition     *requisition);
 178 static void       ev_view_size_request_continuous            (EvView             *view,
 179                                                               GtkRequisition     *requisition);
 180 static void       ev_view_size_request_dual_page             (EvView             *view,
 181                                                               GtkRequisition     *requisition);
 182 static void       ev_view_size_request_single_page           (EvView             *view,
 183                                                               GtkRequisition     *requisition);
 184 static void       ev_view_size_request                       (GtkWidget          *widget,
 185                                                               GtkRequisition     *requisition);
 186 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 187                                                               GtkAllocation      *allocation);
 188 static void       ev_view_realize                            (GtkWidget          *widget);
 189 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 190                                                               GdkEventScroll     *event);
 191 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 192                                                               GdkEventExpose     *event);
 193 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 194 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 195                                                               GdkEventButton     *event);
 196 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 197                                                               GdkEventMotion     *event);
 198 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 199                                                               GdkEventButton     *event);
 200 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 201                                                               GdkEventCrossing   *event);
 202 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 203                                                               GdkEventCrossing   *event);
 204 static void       ev_view_style_set                          (GtkWidget          *widget,
 205                                                               GtkStyle           *old_style);
 206 static void       ev_view_remove_all                         (EvView             *view);
 207
 208 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 209
 210 /*** Drawing ***/
 211 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 212 static void       draw_rubberband                            (GtkWidget          *widget,
 213                                                               GdkWindow          *window,
 214                                                               const GdkRectangle *rect,
 215                                                               guchar              alpha);
 216 static void       highlight_find_results                     (EvView             *view,
 217                                                               int                 page);
 218 static void       draw_one_page                              (EvView             *view,
 219                                                               gint                page,
 220                                                               cairo_t            *cr,
 221                                                               GdkRectangle       *page_area,
 222                                                               GtkBorder          *border,
 223                                                               GdkRectangle       *expose_area,
 224                                                               gboolean           *page_ready);
 225 static void       draw_loading_text                          (EvView             *view,
 226                                                               GdkRectangle       *page_area,
 227                                                               GdkRectangle       *expose_area);
 228
 229 /*** Callbacks ***/
 230 static void       find_changed_cb                            (EvDocument         *document,
 231                                                               int                 page,
 232                                                               EvView             *view);
 233 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 234                                                               GdkRegion          *region,
 235                                                               EvView             *view);
 236 static void       page_changed_cb                            (EvPageCache        *page_cache,
 237                                                               int                 new_page,
 238                                                               EvView             *view);
 239 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 240                                                               EvView             *view);
 241
 242 /*** GObject ***/
 243 static void       ev_view_finalize                           (GObject            *object);
 244 static void       ev_view_destroy                            (GtkObject          *object);
 245 static void       ev_view_set_property                       (GObject            *object,
 246                                                               guint               prop_id,
 247                                                               const GValue       *value,
 248                                                               GParamSpec         *pspec);
 249 static void       ev_view_get_property                       (GObject            *object,
 250                                                               guint               prop_id,
 251                                                               GValue             *value,
 252                                                               GParamSpec         *pspec);
 253 static void       ev_view_class_init                         (EvViewClass        *class);
 254 static void       ev_view_init                               (EvView             *view);
 255
 256 /*** Zoom and sizing ***/
 257 static double   zoom_for_size_fit_width                      (int doc_width,
 258                                                               int doc_height,
 259                                                               int target_width,
 260                                                               int target_height,
 261                                                               int vsb_width);
 262 static double   zoom_for_size_fit_height                     (int doc_width,
 263                                                               int doc_height,
 264                                                               int target_width,
 265                                                               int target_height,
 266                                                               int vsb_height);
 267 static double   zoom_for_size_best_fit                       (int doc_width,
 268                                                               int doc_height,
 269                                                               int target_width,
 270                                                               int target_height,
 271                                                               int vsb_width,
 272                                                               int hsb_width);
 273 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 274                                                               int     width,
 275                                                               int     height);
 276 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 277                                                                 int     width,
 278                                                                 int     height,
 279                                                                 int     vsb_width,
 280                                                                 int     hsb_height);
 281 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 282                                                                 int     width,
 283                                                                 int     height,
 284                                                                 int     vsb_width,
 285                                                                 int     hsb_height);
 286 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 287                                                                 int     width,
 288                                                                 int     height,
 289                                                                 int     vsb_width,
 290                                                                 int     hsb_height);
 291 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 292                                                                 int     width,
 293                                                                 int     height,
 294                                                                 int     vsb_width,
 295                                                                 int     hsb_height);
 296 /*** Cursors ***/
 297 static GdkCursor* ev_view_create_invisible_cursor            (void);
 298 static void       ev_view_set_cursor                         (EvView             *view,
 299                                                               EvViewCursor        new_cursor);
 300 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 301                                                               gint x,
 302                                                               gint y);
 303
 304 /*** Find ***/
 305 static void       update_find_status_message                 (EvView             *view,
 306                                                               gboolean            this_page);
 307 static void       ev_view_set_find_status                    (EvView             *view,
 308                                                               const char         *message);
 309 static void       jump_to_find_result                        (EvView             *view);
 310 static void       jump_to_find_page                          (EvView             *view,
 311                                                               EvViewFindDirection direction,
 312                                                               gint                shift);
 313
 314 /*** Selection ***/
 315 static void       compute_selections                         (EvView             *view,
 316                                                               EvSelectionStyle    style,
 317                                                               GdkPoint           *start,
 318                                                               GdkPoint           *stop);
 319 static void       clear_selection                            (EvView             *view);
 320 static void       clear_link_selected                        (EvView             *view);
 321 static void       selection_free                             (EvViewSelection    *selection);
 322 static char*      get_selected_text                          (EvView             *ev_view);
 323 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 324                                                               GtkSelectionData   *selection_data,
 325                                                               guint               info,
 326                                                               gpointer            data);
 327 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 328                                                               gpointer            data);
 329 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 330
 331 /*** Presentation ***/
 332 static void       ev_view_presentation_transition_start      (EvView             *ev_view);
 333 static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
 334
 335
 336 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 337
 338 static void
 339 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 340 {
 341         GdkPoint view_point;
 342
 343         if (view->document == NULL) {
 344                 return;
 345         }
 346
 347         doc_point_to_view_point (view, view->current_page, &view->pending_point, &view_point);
 348
 349         if (orientation == GTK_ORIENTATION_VERTICAL) {
 350                 view->pending_point.y = 0;
 351         } else {
 352                 view->pending_point.x = 0;
 353         }
 354
 355         if (orientation == GTK_ORIENTATION_VERTICAL) {
 356                 if (view->continuous) {
 357                         gtk_adjustment_clamp_page (view->vadjustment,
 358                                                    view_point.y - view->spacing / 2,
 359                                                    view_point.y + view->vadjustment->page_size);
 360                 } else {
 361                         gtk_adjustment_set_value (view->vadjustment,
 362                                                   CLAMP (view_point.y,
 363                                                   view->vadjustment->lower,
 364                                                   view->vadjustment->upper -
 365                                                   view->vadjustment->page_size));
 366                 }
 367         } else {
 368                 if (view->dual_page) {
 369                         gtk_adjustment_clamp_page (view->hadjustment,
 370                                                    view_point.x,
 371                                                    view_point.x + view->hadjustment->page_size);
 372                 } else {
 373                         gtk_adjustment_set_value (view->hadjustment,
 374                                                   CLAMP (view_point.x,
 375                                                   view->hadjustment->lower,
 376                                                   view->hadjustment->upper -
 377                                                   view->hadjustment->page_size));
 378                 }
 379         }
 380 }
 381
 382 static void
 383 view_set_adjustment_values (EvView         *view,
 384                             GtkOrientation  orientation)
 385 {
 386         GtkWidget *widget = GTK_WIDGET (view);
 387         GtkAdjustment *adjustment;
 388         int requisition;
 389         int allocation;
 390
 391         double factor;
 392         gint new_value;
 393
 394         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 395                 requisition = widget->requisition.width;
 396                 allocation = widget->allocation.width;
 397                 adjustment = view->hadjustment;
 398         } else {
 399                 requisition = widget->requisition.height;
 400                 allocation = widget->allocation.height;
 401                 adjustment = view->vadjustment;
 402         }
 403
 404         if (!adjustment)
 405                 return;
 406
 407         factor = 1.0;
 408         switch (view->pending_scroll) {
 409                 case SCROLL_TO_KEEP_POSITION:
 410                 case SCROLL_TO_FIND_LOCATION:
 411                         factor = (adjustment->value) / adjustment->upper;
 412                         break;
 413                 case SCROLL_TO_PAGE_POSITION:
 414                         break;
 415                 case SCROLL_TO_CENTER:
 416                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 417                         break;
 418         }
 419
 420         adjustment->page_size = allocation;
 421         adjustment->step_increment = allocation * 0.1;
 422         adjustment->page_increment = allocation * 0.9;
 423         adjustment->lower = 0;
 424         adjustment->upper = MAX (allocation, requisition);
 425
 426         /*
 427          * We add 0.5 to the values before to average out our rounding errors.
 428          */
 429         switch (view->pending_scroll) {
 430                 case SCROLL_TO_KEEP_POSITION:
 431                 case SCROLL_TO_FIND_LOCATION:
 432                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 433                         gtk_adjustment_set_value (adjustment, (int)new_value);
 434                         break;
 435                 case SCROLL_TO_PAGE_POSITION:
 436                         scroll_to_current_page (view, orientation);
 437                         break;
 438                 case SCROLL_TO_CENTER:
 439                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 440                                            0, adjustment->upper - adjustment->page_size);
 441                         gtk_adjustment_set_value (adjustment, (int)new_value);
 442                         break;
 443         }
 444
 445         gtk_adjustment_changed (adjustment);
 446 }
 447
 448 static void
 449 view_update_range_and_current_page (EvView *view)
 450 {
 451         gint current_page;
 452         gint best_current_page = -1;
 453
 454         /* Presentation trumps all other modes */
 455         if (view->presentation) {
 456                 view->start_page = view->current_page;
 457                 view->end_page = view->current_page;
 458         } else if (view->continuous) {
 459                 GdkRectangle current_area, unused, page_area;
 460                 GtkBorder border;
 461                 gboolean found = FALSE;
 462                 gint area_max = -1, area;
 463                 int i;
 464
 465                 if (!(view->vadjustment && view->hadjustment))
 466                         return;
 467
 468                 current_area.x = view->hadjustment->value;
 469                 current_area.width = view->hadjustment->upper;
 470                 current_area.y = view->vadjustment->value;
 471                 current_area.height = view->vadjustment->page_size;
 472
 473                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 474
 475                         get_page_extents (view, i, &page_area, &border);
 476
 477                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 478                                 area = unused.width * unused.height;
 479
 480                                 if (!found) {
 481                                         area_max = area;
 482                                         view->start_page = i;
 483                                         found = TRUE;
 484                                         best_current_page = i;
 485                                 }
 486                                 if (area > area_max) {
 487                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 488                                         area_max = area;
 489                                 }
 490
 491                                 view->end_page = i;
 492                         } else if (found && view->current_page <= view->end_page) {
 493                                 break;
 494                         }
 495                 }
 496
 497         } else if (view->dual_page) {
 498                 if (view->current_page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) {
 499                         view->start_page = view->current_page;
 500                         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 501                                 view->end_page = view->start_page + 1;
 502                         else
 503                                 view->end_page = view->start_page;
 504                 } else {
 505                         if (view->current_page < 1)
 506                                 view->start_page = view->current_page;
 507                         else
 508                                 view->start_page = view->current_page - 1;
 509                         view->end_page = view->current_page;
 510                 }
 511         } else {
 512                 view->start_page = view->current_page;
 513                 view->end_page = view->current_page;
 514         }
 515
 516         best_current_page = MAX (best_current_page, view->start_page);
 517         current_page = ev_page_cache_get_current_page (view->page_cache);
 518
 519         if ((current_page != best_current_page) && (view->pending_scroll == SCROLL_TO_KEEP_POSITION)) {
 520                 view->current_page = best_current_page;
 521                 ev_page_cache_set_current_page (view->page_cache, best_current_page);
 522         }
 523
 524         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 525                                         view->start_page,
 526                                         view->end_page,
 527                                         view->rotation,
 528                                         view->scale,
 529                                         view->selection_info.selections);
 530 }
 531
 532 static void
 533 set_scroll_adjustment (EvView *view,
 534                        GtkOrientation  orientation,
 535                        GtkAdjustment  *adjustment)
 536 {
 537         GtkAdjustment **to_set;
 538
 539         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 540                 to_set = &view->hadjustment;
 541         else
 542                 to_set = &view->vadjustment;
 543
 544         if (*to_set != adjustment) {
 545                 if (*to_set) {
 546                         g_signal_handlers_disconnect_by_func (*to_set,
 547                                                               (gpointer) on_adjustment_value_changed,
 548                                                               view);
 549                         g_object_unref (*to_set);
 550                 }
 551
 552                 *to_set = adjustment;
 553                 view_set_adjustment_values (view, orientation);
 554
 555                 if (*to_set) {
 556                         g_object_ref (*to_set);
 557                         g_signal_connect (*to_set, "value_changed",
 558                                           G_CALLBACK (on_adjustment_value_changed), view);
 559                 }
 560         }
 561 }
 562
 563 static void
 564 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 565                                 GtkAdjustment  *hadjustment,
 566                                 GtkAdjustment  *vadjustment)
 567 {
 568         EvView *view = EV_VIEW (layout);
 569
 570         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 571         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 572
 573         on_adjustment_value_changed (NULL, view);
 574 }
 575
 576 static void
 577 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 578                            guint           keyval,
 579                            GdkModifierType modifiers,
 580                            EvScrollType    scroll,
 581                            gboolean        horizontal)
 582 {
 583   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 584
 585   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 586                                 "binding_activated", 2,
 587                                 EV_TYPE_SCROLL_TYPE, scroll,
 588                                 G_TYPE_BOOLEAN, horizontal);
 589   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 590                                 "binding_activated", 2,
 591                                 EV_TYPE_SCROLL_TYPE, scroll,
 592                                 G_TYPE_BOOLEAN, horizontal);
 593 }
 594
 595 void
 596 ev_view_scroll (EvView        *view,
 597                 EvScrollType   scroll,
 598                 gboolean horizontal)
 599 {
 600         GtkAdjustment *adjustment;
 601         double value, increment;
 602         gboolean first_page = FALSE;
 603         gboolean last_page = FALSE;
 604
 605         view->jump_to_find_result = FALSE;
 606
 607         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 608                 switch (scroll) {
 609                         case EV_SCROLL_PAGE_BACKWARD:
 610                         case EV_SCROLL_STEP_BACKWARD:
 611                                 ev_view_previous_page (view);
 612                                 break;
 613                         case EV_SCROLL_PAGE_FORWARD:
 614                         case EV_SCROLL_STEP_FORWARD:
 615                                 ev_view_next_page (view);
 616                                 break;
 617                         default:
 618                                 break;
 619                 }
 620                 return;
 621         }
 622
 623         /* Assign values for increment and vertical adjustment */
 624         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 625         increment = adjustment->page_size * 0.75;
 626         value = adjustment->value;
 627
 628         /* Assign boolean for first and last page */
 629         if (view->current_page == 0)
 630                 first_page = TRUE;
 631         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 632                 last_page = TRUE;
 633
 634         switch (scroll) {
 635                 case EV_SCROLL_PAGE_BACKWARD:
 636                         /* Do not jump backwards if at the first page */
 637                         if (value == (adjustment->lower) && first_page) {
 638                                 /* Do nothing */
 639                                 /* At the top of a page, assign the upper bound limit of previous page */
 640                         } else if (value == (adjustment->lower)) {
 641                                 value = adjustment->upper - adjustment->page_size;
 642                                 ev_view_previous_page (view);
 643                                 /* Jump to the top */
 644                         } else {
 645                                 value = MAX (value - increment, adjustment->lower);
 646                         }
 647                         break;
 648                 case EV_SCROLL_PAGE_FORWARD:
 649                         /* Do not jump forward if at the last page */
 650                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 651                                 /* Do nothing */
 652                         /* At the bottom of a page, assign the lower bound limit of next page */
 653                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 654                                 value = 0;
 655                                 ev_view_next_page (view);
 656                         /* Jump to the bottom */
 657                         } else {
 658                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 659                         }
 660                         break;
 661                 case EV_SCROLL_STEP_BACKWARD:
 662                         value -= adjustment->step_increment;
 663                         break;
 664                 case EV_SCROLL_STEP_FORWARD:
 665                         value += adjustment->step_increment;
 666                         break;
 667                 case EV_SCROLL_STEP_DOWN:
 668                         value -= adjustment->step_increment / 10;
 669                         break;
 670                 case EV_SCROLL_STEP_UP:
 671                         value += adjustment->step_increment / 10;
 672                         break;
 673                 default:
 674                         break;
 675         }
 676
 677         value = CLAMP (value, adjustment->lower,
 678                        adjustment->upper - adjustment->page_size);
 679
 680         gtk_adjustment_set_value (adjustment, value);
 681 }
 682
 683 #define MARGIN 5
 684
 685 static void
 686 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 687 {
 688         GtkWidget *widget = GTK_WIDGET (view);
 689         GtkAdjustment *adjustment;
 690         int value;
 691
 692         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 693
 694         adjustment = view->vadjustment;
 695
 696         if (rect->y < adjustment->value) {
 697                 value = MAX (adjustment->lower, rect->y - MARGIN);
 698                 gtk_adjustment_set_value (view->vadjustment, value);
 699         } else if (rect->y + rect->height >
 700                    adjustment->value + widget->allocation.height) {
 701                 value = MIN (adjustment->upper, rect->y + rect->height -
 702                              widget->allocation.height + MARGIN);
 703                 gtk_adjustment_set_value (view->vadjustment, value);
 704         }
 705
 706         adjustment = view->hadjustment;
 707
 708         if (rect->x < adjustment->value) {
 709                 value = MAX (adjustment->lower, rect->x - MARGIN);
 710                 gtk_adjustment_set_value (view->hadjustment, value);
 711         } else if (rect->x + rect->height >
 712                    adjustment->value + widget->allocation.width) {
 713                 value = MIN (adjustment->upper, rect->x + rect->width -
 714                              widget->allocation.width + MARGIN);
 715                 gtk_adjustment_set_value (view->hadjustment, value);
 716         }
 717
 718         gtk_widget_queue_resize (GTK_WIDGET (view));
 719 }
 720
 721 /*** Geometry computations ***/
 722
 723 static void
 724 compute_border (EvView *view, int width, int height, GtkBorder *border)
 725 {
 726         if (view->presentation) {
 727                 border->left = 0;
 728                 border->right = 0;
 729                 border->top = 0;
 730                 border->bottom = 0;
 731         } else {
 732                 ev_document_misc_get_page_border_size (width, height, border);
 733         }
 734 }
 735
 736 static void
 737 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 738 {
 739         int max_width, offset;
 740         GtkBorder border;
 741
 742         g_return_if_fail (y_offset != NULL);
 743
 744         ev_page_cache_get_max_width (view->page_cache, view->rotation, zoom, &max_width);
 745
 746         compute_border (view, max_width, max_width, &border);
 747
 748         if (view->dual_page) {
 749                 ev_page_cache_get_height_to_page (view->page_cache, page,
 750                                                   view->rotation, zoom, NULL, &offset);
 751                 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);
 752         } else {
 753                 ev_page_cache_get_height_to_page (view->page_cache, page,
 754                                                   view->rotation, zoom, &offset, NULL);
 755                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 756         }
 757
 758         *y_offset = offset;
 759         return;
 760 }
 761
 762 static gboolean
 763 get_page_extents (EvView       *view,
 764                   gint          page,
 765                   GdkRectangle *page_area,
 766                   GtkBorder    *border)
 767 {
 768         GtkWidget *widget;
 769         int width, height;
 770
 771         widget = GTK_WIDGET (view);
 772
 773         /* Get the size of the page */
 774         ev_page_cache_get_size (view->page_cache, page,
 775                                 view->rotation,
 776                                 view->scale,
 777                                 &width, &height);
 778         compute_border (view, width, height, border);
 779         page_area->width = width + border->left + border->right;
 780         page_area->height = height + border->top + border->bottom;
 781
 782         if (view->presentation) {
 783                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 784                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 785         } else if (view->continuous) {
 786                 gint max_width;
 787                 gint x, y;
 788
 789                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 790                                              view->scale, &max_width);
 791                 max_width = max_width + border->left + border->right;
 792                 /* Get the location of the bounding box */
 793                 if (view->dual_page) {
 794                         x = view->spacing + ((page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? 0 : 1) * (max_width + view->spacing);
 795                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 796                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 797                                 x = x + (max_width - width - border->left - border->right);
 798                 } else {
 799                         x = view->spacing;
 800                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 801                 }
 802
 803                 get_page_y_offset (view, page, view->scale, &y);
 804
 805                 page_area->x = x;
 806                 page_area->y = y;
 807         } else {
 808                 gint x, y;
 809                 if (view->dual_page) {
 810                         gint width_2, height_2;
 811                         gint max_width = width;
 812                         gint max_height = height;
 813                         GtkBorder overall_border;
 814                         gint other_page;
 815
 816                         other_page = (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? page + 1: page - 1;
 817
 818                         /* First, we get the bounding box of the two pages */
 819                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)
 820                             && (0 <= other_page)) {
 821                                 ev_page_cache_get_size (view->page_cache,
 822                                                         other_page,
 823                                                         view->rotation,
 824                                                         view->scale,
 825                                                         &width_2, &height_2);
 826                                 if (width_2 > width)
 827                                         max_width = width_2;
 828                                 if (height_2 > height)
 829                                         max_height = height_2;
 830                         }
 831                         compute_border (view, max_width, max_height, &overall_border);
 832
 833                         /* Find the offsets */
 834                         x = view->spacing;
 835                         y = view->spacing;
 836
 837                         /* Adjust for being the left or right page */
 838                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 839                                 x = x + max_width - width;
 840                         else
 841                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 842
 843                         y = y + (max_height - height)/2;
 844
 845                         /* Adjust for extra allocation */
 846                         x = x + MAX (0, widget->allocation.width -
 847                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 848                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 849                 } else {
 850                         x = view->spacing;
 851                         y = view->spacing;
 852
 853                         /* Adjust for extra allocation */
 854                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 855                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 856                 }
 857
 858                 page_area->x = x;
 859                 page_area->y = y;
 860         }
 861
 862         return TRUE;
 863 }
 864
 865 static void
 866 view_point_to_doc_point (EvView *view,
 867                          GdkPoint *view_point,
 868                          GdkRectangle *page_area,
 869                          double  *doc_point_x,
 870                          double  *doc_point_y)
 871 {
 872         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 873         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 874 }
 875
 876 static void
 877 view_rect_to_doc_rect (EvView *view,
 878                        GdkRectangle *view_rect,
 879                        GdkRectangle *page_area,
 880                        EvRectangle  *doc_rect)
 881 {
 882         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 883         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 884         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 885         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 886 }
 887
 888 static gboolean
 889 doc_point_to_view_point (EvView       *view,
 890                          int           page,
 891                          EvPoint      *doc_point,
 892                          GdkPoint     *view_point)
 893 {
 894         GdkRectangle page_area;
 895         GtkBorder border;
 896         double x, y, view_x, view_y;
 897         int width, height;
 898
 899         ev_page_cache_get_size (view->page_cache, page,
 900                                 view->rotation,
 901                                 1.0,
 902                                 &width, &height);
 903
 904         if (view->rotation == 0) {
 905                 x = doc_point->x;
 906                 y = doc_point->y;
 907         } else if (view->rotation == 90) {
 908                 x = width - doc_point->y;
 909                 y = doc_point->x;
 910         } else if (view->rotation == 180) {
 911                 x = width - doc_point->x;
 912                 y = height - doc_point->y;
 913         } else if (view->rotation == 270) {
 914                 x = doc_point->y;
 915                 y = height - doc_point->x;
 916         } else {
 917                 g_assert_not_reached ();
 918         }
 919
 920         get_page_extents (view, page, &page_area, &border);
 921
 922         view_x = x * view->scale;
 923         view_y = y * view->scale;
 924         view_point->x = view_x + page_area.x;
 925         view_point->y = view_y + page_area.y;
 926
 927         return (view_x > 0 && view_x <= page_area.width &&
 928                 view_y > 0 && view_y <= page_area.height);
 929 }
 930
 931 static void
 932 doc_rect_to_view_rect (EvView       *view,
 933                        int           page,
 934                        EvRectangle  *doc_rect,
 935                        GdkRectangle *view_rect)
 936 {
 937         GdkRectangle page_area;
 938         GtkBorder border;
 939         double x, y, w, h;
 940         int width, height;
 941
 942         ev_page_cache_get_size (view->page_cache, page,
 943                                 view->rotation,
 944                                 1.0,
 945                                 &width, &height);
 946
 947         if (view->rotation == 0) {
 948                 x = doc_rect->x1;
 949                 y = doc_rect->y1;
 950                 w = doc_rect->x2 - doc_rect->x1;
 951                 h = doc_rect->y2 - doc_rect->y1;
 952         } else if (view->rotation == 90) {
 953                 x = width - doc_rect->y2;
 954                 y = doc_rect->x1;
 955                 w = doc_rect->y2 - doc_rect->y1;
 956                 h = doc_rect->x2 - doc_rect->x1;
 957         } else if (view->rotation == 180) {
 958                 x = width - doc_rect->x2;
 959                 y = height - doc_rect->y2;
 960                 w = doc_rect->x2 - doc_rect->x1;
 961                 h = doc_rect->y2 - doc_rect->y1;
 962         } else if (view->rotation == 270) {
 963                 x = doc_rect->y1;
 964                 y = height - doc_rect->x2;
 965                 w = doc_rect->y2 - doc_rect->y1;
 966                 h = doc_rect->x2 - doc_rect->x1;
 967         } else {
 968                 g_assert_not_reached ();
 969         }
 970
 971         get_page_extents (view, page, &page_area, &border);
 972
 973         view_rect->x = x * view->scale + page_area.x;
 974         view_rect->y = y * view->scale + page_area.y;
 975         view_rect->width = w * view->scale;
 976         view_rect->height = h * view->scale;
 977 }
 978
 979 static void
 980 find_page_at_location (EvView  *view,
 981                        gdouble  x,
 982                        gdouble  y,
 983                        gint    *page,
 984                        gint    *x_offset,
 985                        gint    *y_offset)
 986 {
 987         int i;
 988
 989         if (view->document == NULL)
 990                 return;
 991
 992         g_assert (page);
 993         g_assert (x_offset);
 994         g_assert (y_offset);
 995
 996         for (i = view->start_page; i <= view->end_page; i++) {
 997                 GdkRectangle page_area;
 998                 GtkBorder border;
 999
1000                 if (! get_page_extents (view, i, &page_area, &border))
1001                         continue;
1002
1003                 if ((x >= page_area.x + border.left) &&
1004                     (x < page_area.x + page_area.width - border.right) &&
1005                     (y >= page_area.y + border.top) &&
1006                     (y < page_area.y + page_area.height - border.bottom)) {
1007                         *page = i;
1008                         *x_offset = x - (page_area.x + border.left);
1009                         *y_offset = y - (page_area.y + border.top);
1010                         return;
1011                 }
1012         }
1013
1014         *page = -1;
1015 }
1016
1017 static gboolean
1018 location_in_text (EvView  *view,
1019                   gdouble  x,
1020                   gdouble  y)
1021 {
1022         GdkRegion *region;
1023         gint page = -1;
1024         gint x_offset = 0, y_offset = 0;
1025
1026         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1027
1028         if (page == -1)
1029                 return FALSE;
1030
1031         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1032
1033         if (region)
1034                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1035         else
1036                 return FALSE;
1037 }
1038
1039 static int
1040 ev_view_get_width (EvView *view)
1041 {
1042         return GTK_WIDGET (view)->allocation.width;
1043 }
1044
1045 static int
1046 ev_view_get_height (EvView *view)
1047 {
1048         return GTK_WIDGET (view)->allocation.height;
1049 }
1050
1051 static gboolean
1052 location_in_selected_text (EvView  *view,
1053                            gdouble  x,
1054                            gdouble  y)
1055 {
1056         gint page = -1;
1057         gint x_offset = 0, y_offset = 0;
1058         EvViewSelection *selection;
1059         GList *l = NULL;
1060
1061         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1062                 selection = (EvViewSelection *)l->data;
1063
1064                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1065
1066                 if (page != selection->page)
1067                         continue;
1068
1069                 if (selection->covered_region &&
1070                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1071                         return TRUE;
1072         }
1073
1074         return FALSE;
1075 }
1076
1077 static gboolean
1078 get_doc_point_from_offset (EvView *view,
1079                            gint    page,
1080                            gint    x_offset,
1081                            gint    y_offset,
1082                            gint   *x_new,
1083                            gint   *y_new)
1084 {
1085         int width, height;
1086         double x, y;
1087
1088         ev_page_cache_get_size (view->page_cache, page,
1089                                 view->rotation,
1090                                 1.0,
1091                                 &width, &height);
1092
1093         x_offset = x_offset / view->scale;
1094         y_offset = y_offset / view->scale;
1095
1096         if (view->rotation == 0) {
1097                 x = x_offset;
1098                 y = y_offset;
1099         } else if (view->rotation == 90) {
1100                 x = y_offset;
1101                 y = width - x_offset;
1102         } else if (view->rotation == 180) {
1103                 x = width - x_offset;
1104                 y = height - y_offset;
1105         } else if (view->rotation == 270) {
1106                 x = height - y_offset;
1107                 y = x_offset;
1108         } else {
1109                 g_assert_not_reached ();
1110         }
1111
1112         *x_new = x;
1113         *y_new = y;
1114
1115         return TRUE;
1116 }
1117
1118 /*** Hyperref ***/
1119 static EvLink *
1120 ev_view_get_link_at_location (EvView  *view,
1121                               gdouble  x,
1122                               gdouble  y)
1123 {
1124         gint page = -1;
1125         gint x_offset = 0, y_offset = 0;
1126         gint x_new = 0, y_new = 0;
1127         GList *link_mapping;
1128
1129         if (!EV_IS_DOCUMENT_LINKS (view->document))
1130                 return NULL;
1131
1132         x += view->scroll_x;
1133         y += view->scroll_y;
1134
1135         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1136
1137         if (page == -1)
1138                 return NULL;
1139
1140
1141         if (get_doc_point_from_offset (view, page, x_offset,
1142                                        y_offset, &x_new, &y_new) == FALSE)
1143                 return NULL;
1144
1145         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1146
1147         if (link_mapping)
1148                 return ev_link_mapping_find (link_mapping, x_new, y_new);
1149         else
1150                 return NULL;
1151 }
1152
1153 static void
1154 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1155 {
1156         EvPoint doc_point;
1157         gdouble zoom, left, top;
1158         gboolean change_left, change_top;
1159
1160         left = ev_link_dest_get_left (dest, &change_left);
1161         top = ev_link_dest_get_top (dest, &change_top);
1162
1163         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1164                                        ev_link_dest_get_bottom (dest) - top,
1165                                        ev_view_get_width (view),
1166                                        ev_view_get_height (view), 0, 0);
1167
1168         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1169         ev_view_set_zoom (view, zoom, FALSE);
1170
1171         doc_point.x = change_left ? left : 0;
1172         doc_point.y = change_top ? top : 0;
1173
1174         view->current_page = ev_link_dest_get_page (dest);
1175         if (change_left || change_top)
1176                 view->pending_point = doc_point;
1177         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1178
1179         gtk_widget_queue_resize (GTK_WIDGET (view));
1180 }
1181
1182 static void
1183 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1184 {
1185         EvPoint doc_point;
1186         int doc_width, doc_height, page;
1187         double zoom, left;
1188         gboolean change_left;
1189
1190         page = ev_link_dest_get_page (dest);
1191         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1192
1193         left = ev_link_dest_get_left (dest, &change_left);
1194         doc_point.x = change_left ? left : 0;
1195         doc_point.y = 0;
1196
1197         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1198                                          ev_view_get_width (view),
1199                                          ev_view_get_height (view), 0);
1200
1201         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1202         ev_view_set_zoom (view, zoom, FALSE);
1203
1204         view->current_page = page;
1205         if (change_left)
1206                 view->pending_point = doc_point;
1207         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1208
1209         gtk_widget_queue_resize (GTK_WIDGET (view));
1210 }
1211
1212 static void
1213 goto_fith_dest (EvView *view, EvLinkDest *dest)
1214 {
1215         EvPoint doc_point;
1216         int doc_width, doc_height, page;
1217         gdouble zoom, top;
1218         gboolean change_top;
1219
1220         page = ev_link_dest_get_page (dest);
1221         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1222
1223         top = ev_link_dest_get_top (dest, &change_top);
1224
1225         doc_point.x = 0;
1226         doc_point.y = change_top ? top : 0;
1227
1228         zoom = zoom_for_size_fit_width (doc_width, top,
1229                                         ev_view_get_width (view),
1230                                         ev_view_get_height (view), 0);
1231
1232         ev_view_set_sizing_mode (view, EV_SIZING_FIT_WIDTH);
1233         ev_view_set_zoom (view, zoom, FALSE);
1234
1235         view->current_page = page;
1236         if (change_top)
1237                 view->pending_point = doc_point;
1238         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1239
1240         gtk_widget_queue_resize (GTK_WIDGET (view));
1241 }
1242
1243 static void
1244 goto_fit_dest (EvView *view, EvLinkDest *dest)
1245 {
1246         double zoom;
1247         int doc_width, doc_height;
1248         int page;
1249
1250         page = ev_link_dest_get_page (dest);
1251         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1252
1253         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1254                                        ev_view_get_height (view), 0, 0);
1255
1256         ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
1257         ev_view_set_zoom (view, zoom, FALSE);
1258
1259         view->current_page = page;
1260         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1261
1262         gtk_widget_queue_resize (GTK_WIDGET (view));
1263 }
1264
1265 static void
1266 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1267 {
1268         EvPoint doc_point;
1269         gint page;
1270         gdouble zoom, left, top;
1271         gboolean change_zoom, change_left, change_top;
1272
1273         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1274         page = ev_link_dest_get_page (dest);
1275
1276         if (change_zoom && zoom > 1) {
1277                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1278                 ev_view_set_zoom (view, zoom, FALSE);
1279         }
1280
1281         left = ev_link_dest_get_left (dest, &change_left);
1282         top = ev_link_dest_get_top (dest, &change_top);
1283
1284         doc_point.x = change_left ? left : 0;
1285         doc_point.y = change_top ? top : 0;
1286
1287         view->current_page = page;
1288         if (change_left || change_top)
1289                 view->pending_point = doc_point;
1290         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1291
1292         gtk_widget_queue_resize (GTK_WIDGET (view));
1293 }
1294
1295 static void
1296 goto_dest (EvView *view, EvLinkDest *dest)
1297 {
1298         EvLinkDestType type;
1299         int page, n_pages, current_page;
1300
1301         page = ev_link_dest_get_page (dest);
1302         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1303
1304         if (page < 0 || page >= n_pages)
1305                 return;
1306
1307         current_page = view->current_page;
1308
1309         type = ev_link_dest_get_dest_type (dest);
1310
1311         switch (type) {
1312                 case EV_LINK_DEST_TYPE_PAGE:
1313                         ev_page_cache_set_current_page (view->page_cache, page);
1314                         break;
1315                 case EV_LINK_DEST_TYPE_FIT:
1316                         goto_fit_dest (view, dest);
1317                         break;
1318                 case EV_LINK_DEST_TYPE_FITH:
1319                         goto_fith_dest (view, dest);
1320                         break;
1321                 case EV_LINK_DEST_TYPE_FITV:
1322                         goto_fitv_dest (view, dest);
1323                         break;
1324                 case EV_LINK_DEST_TYPE_FITR:
1325                         goto_fitr_dest (view, dest);
1326                         break;
1327                 case EV_LINK_DEST_TYPE_XYZ:
1328                         goto_xyz_dest (view, dest);
1329                         break;
1330                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1331                         ev_page_cache_set_page_label (view->page_cache, ev_link_dest_get_page_label (dest));
1332                         break;
1333                 default:
1334                         g_assert_not_reached ();
1335         }
1336
1337         if (current_page != view->current_page)
1338                 ev_page_cache_set_current_page (view->page_cache,
1339                                                 view->current_page);
1340 }
1341
1342 static void
1343 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1344 {
1345         EvLinkDestType type;
1346
1347         type = ev_link_dest_get_dest_type (dest);
1348
1349         if (type == EV_LINK_DEST_TYPE_NAMED) {
1350                 EvLinkDest  *dest2;
1351                 const gchar *named_dest;
1352
1353                 named_dest = ev_link_dest_get_named_dest (dest);
1354                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1355                                                           named_dest);
1356                 if (dest2) {
1357                         goto_dest (view, dest2);
1358                         g_object_unref (dest2);
1359                 }
1360
1361                 return;
1362         }
1363
1364         goto_dest (view, dest);
1365 }
1366
1367 void
1368 ev_view_handle_link (EvView *view, EvLink *link)
1369 {
1370         EvLinkAction    *action = NULL;
1371         EvLinkActionType type;
1372
1373         action = ev_link_get_action (link);
1374         if (!action)
1375                 return;
1376
1377         type = ev_link_action_get_action_type (action);
1378
1379         switch (type) {
1380                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1381                         EvLinkDest *dest;
1382
1383                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1384
1385                         dest = ev_link_action_get_dest (action);
1386                         ev_view_goto_dest (view, dest);
1387                 }
1388                         break;
1389                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1390                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1391                 case EV_LINK_ACTION_TYPE_LAUNCH:
1392                 case EV_LINK_ACTION_TYPE_NAMED:
1393                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1394                         break;
1395         }
1396 }
1397
1398 gchar *
1399 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1400 {
1401         EvLinkDestType type;
1402         gchar *msg = NULL;
1403
1404         type = ev_link_dest_get_dest_type (dest);
1405
1406         switch (type) {
1407                 case EV_LINK_DEST_TYPE_NAMED: {
1408                         EvLinkDest  *dest2;
1409                         const gchar *named_dest;
1410
1411                         named_dest = ev_link_dest_get_named_dest (dest);
1412                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1413                                                                   named_dest);
1414                         if (dest2) {
1415                                 msg = ev_page_cache_get_page_label (view->page_cache,
1416                                                                     ev_link_dest_get_page (dest2));
1417                                 g_object_unref (dest2);
1418                         }
1419                 }
1420
1421                         break;
1422                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1423                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1424                 }
1425                         break;
1426                 default:
1427                         msg = ev_page_cache_get_page_label (view->page_cache,
1428                                                             ev_link_dest_get_page (dest));
1429         }
1430
1431         return msg;
1432 }
1433
1434 static char *
1435 tip_from_action_named (EvLinkAction *action)
1436 {
1437         const gchar *name = ev_link_action_get_name (action);
1438
1439         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1440                 return g_strdup (_("Go to first page"));
1441         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1442                 return g_strdup (_("Go to previous page"));
1443         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1444                 return g_strdup (_("Go to next page"));
1445         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1446                 return g_strdup (_("Go to last page"));
1447         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1448                 return g_strdup (_("Go to page"));
1449         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1450                 return g_strdup (_("Find"));
1451         }
1452
1453         return NULL;
1454 }
1455
1456 static char *
1457 tip_from_link (EvView *view, EvLink *link)
1458 {
1459         EvLinkAction *action;
1460         EvLinkActionType type;
1461         char *msg = NULL;
1462         char *page_label;
1463         const char *title;
1464
1465         action = ev_link_get_action (link);
1466         title = ev_link_get_title (link);
1467
1468         if (!action)
1469                 return title ? g_strdup (title) : NULL;
1470
1471         type = ev_link_action_get_action_type (action);
1472
1473         switch (type) {
1474                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1475                         page_label = ev_view_page_label_from_dest (view,
1476                                                                    ev_link_action_get_dest (action));
1477                         if (page_label) {
1478                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1479                                 g_free (page_label);
1480                         }
1481                         break;
1482                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1483                         if (title) {
1484                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1485                                                        ev_link_action_get_filename (action));
1486                         } else {
1487                                 msg = g_strdup_printf (_("Go to file “%s”"),
1488                                                        ev_link_action_get_filename (action));
1489                         }
1490                         break;
1491                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1492                         msg = g_strdup (ev_link_action_get_uri (action));
1493                         break;
1494                 case EV_LINK_ACTION_TYPE_LAUNCH:
1495                         msg = g_strdup_printf (_("Launch %s"),
1496                                                ev_link_action_get_filename (action));
1497                         break;
1498                 case EV_LINK_ACTION_TYPE_NAMED:
1499                         msg = tip_from_action_named (action);
1500                         break;
1501                 default:
1502                         if (title)
1503                                 msg = g_strdup (title);
1504                         break;
1505         }
1506
1507         return msg;
1508 }
1509
1510 static void
1511 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1512 {
1513         EvLink      *link;
1514         EvFormField *field;
1515
1516         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1517                 return;
1518
1519         if (view->drag_info.in_drag) {
1520                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1521                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1522                 return;
1523         }
1524
1525         if (view->scroll_info.autoscrolling) {
1526                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1527                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1528                 return;
1529         }
1530
1531         link = ev_view_get_link_at_location (view, x, y);
1532
1533 #if !GTK_CHECK_VERSION (2, 11, 7)
1534         if (view->link_tooltip == NULL) {
1535                 view->link_tooltip = ev_tooltip_new (GTK_WIDGET (view));
1536         }
1537
1538         if (view->hovered_link != link) {
1539                 view->hovered_link = link;
1540                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
1541         }
1542 #endif
1543
1544         if (link) {
1545 #if GTK_CHECK_VERSION (2, 11, 7)
1546                 g_object_set (view, "has-tooltip", TRUE, NULL);
1547 #else
1548                 char *msg = tip_from_link (view, link);
1549
1550                 if (msg && g_utf8_validate (msg, -1, NULL)) {
1551                         EvTooltip *tooltip = EV_TOOLTIP (view->link_tooltip);
1552
1553                         ev_tooltip_set_position (tooltip, x, y);
1554                         ev_tooltip_set_text (tooltip, msg);
1555                         ev_tooltip_activate (tooltip);
1556                 }
1557                 g_free (msg);
1558 #endif
1559                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1560         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1561                 if (field->is_read_only) {
1562                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1563                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1564                             view->cursor == EV_VIEW_CURSOR_DRAG)
1565                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1566                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1567                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1568                 } else {
1569                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1570                 }
1571         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1572                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1573         } else {
1574                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1575                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1576                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1577                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1578                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1579         }
1580 }
1581
1582 /*** Images ***/
1583 static EvImage *
1584 ev_view_get_image_at_location (EvView  *view,
1585                                gdouble  x,
1586                                gdouble  y)
1587 {
1588         gint page = -1;
1589         gint x_offset = 0, y_offset = 0;
1590         gint x_new = 0, y_new = 0;
1591         GList *image_mapping;
1592
1593         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1594                 return NULL;
1595
1596         x += view->scroll_x;
1597         y += view->scroll_y;
1598
1599         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1600
1601         if (page == -1)
1602                 return NULL;
1603
1604         if (get_doc_point_from_offset (view, page, x_offset,
1605                                        y_offset, &x_new, &y_new) == FALSE)
1606                 return NULL;
1607
1608         image_mapping = ev_pixbuf_cache_get_image_mapping (view->pixbuf_cache, page);
1609
1610         if (image_mapping)
1611                 return ev_image_mapping_find (image_mapping, x_new, y_new);
1612         else
1613                 return NULL;
1614 }
1615
1616 /*** Forms ***/
1617 static EvFormField *
1618 ev_view_get_form_field_at_location (EvView  *view,
1619                                     gdouble  x,
1620                                     gdouble  y)
1621 {
1622         gint page = -1;
1623         gint x_offset = 0, y_offset = 0;
1624         gint x_new = 0, y_new = 0;
1625         GList *forms_mapping;
1626
1627         if (!EV_IS_DOCUMENT_FORMS (view->document))
1628                 return NULL;
1629
1630         x += view->scroll_x;
1631         y += view->scroll_y;
1632
1633         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1634
1635         if (page == -1)
1636                 return NULL;
1637
1638         if (get_doc_point_from_offset (view, page, x_offset,
1639                                        y_offset, &x_new, &y_new) == FALSE)
1640                 return NULL;
1641
1642         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, page);
1643
1644         if (forms_mapping)
1645                 return ev_form_field_mapping_find (forms_mapping, x_new, y_new);
1646         else
1647                 return NULL;
1648 }
1649
1650 static GdkRegion *
1651 ev_view_form_field_get_region (EvView      *view,
1652                                EvFormField *field)
1653 {
1654         EvRectangle  field_area;
1655         GdkRectangle view_area;
1656         GList       *forms_mapping;
1657
1658         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1659                                                                 field->page->index);
1660         ev_form_field_mapping_get_area (forms_mapping, field, &field_area);
1661         doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
1662         view_area.x -= view->scroll_x;
1663         view_area.y -= view->scroll_y;
1664
1665         return gdk_region_rectangle (&view_area);
1666 }
1667
1668 static gboolean
1669 ev_view_forms_remove_widgets (EvView *view)
1670 {
1671         ev_view_remove_all (view);
1672
1673         return FALSE;
1674 }
1675
1676 static void
1677 ev_view_form_field_destroy (GtkWidget *widget,
1678                             EvView    *view)
1679 {
1680         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1681 }
1682
1683 static GtkWidget *
1684 ev_view_form_field_button_create_widget (EvView      *view,
1685                                          EvFormField *field)
1686 {
1687         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1688         GdkRegion         *field_region = NULL;
1689
1690         switch (field_button->type) {
1691                 case EV_FORM_FIELD_BUTTON_PUSH:
1692                         return NULL;
1693                 case EV_FORM_FIELD_BUTTON_CHECK:
1694                 case EV_FORM_FIELD_BUTTON_RADIO: {
1695                         gboolean  state;
1696                         GList    *forms_mapping, *l;
1697
1698                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1699                                                                                field);
1700
1701                         /* FIXME: it actually depends on NoToggleToOff flags */
1702                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1703                             state && field_button->state)
1704                                 return NULL;
1705
1706                         field_region = ev_view_form_field_get_region (view, field);
1707
1708                         /* For radio buttons and checkbox buttons that are in a set
1709                          * we need to update also the region for the current selected item
1710                          */
1711                         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1712                                                                                 field->page->index);
1713                         for (l = forms_mapping; l; l = g_list_next (l)) {
1714                                 EvFormField *button = ((EvFormFieldMapping *)(l->data))->field;
1715                                 GdkRegion   *button_region;
1716
1717                                 if (button->id == field->id)
1718                                         continue;
1719
1720                                 /* FIXME: only buttons in the same group should be updated */
1721                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1722                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1723                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1724                                         continue;
1725
1726                                 button_region = ev_view_form_field_get_region (view, button);
1727                                 gdk_region_union (field_region, button_region);
1728                                 gdk_region_destroy (button_region);
1729                         }
1730
1731                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
1732                                                                        field, !state);
1733                         field_button->state = !state;
1734                 }
1735                         break;
1736         }
1737
1738         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
1739                                      field_region,
1740                                      field->page->index,
1741                                      view->rotation,
1742                                      view->scale);
1743         gdk_region_destroy (field_region);
1744
1745         return NULL;
1746 }
1747
1748 static void
1749 ev_view_form_field_text_save (EvView    *view,
1750                               GtkWidget *widget)
1751 {
1752         EvFormField *field;
1753
1754         if (!view->document)
1755                 return;
1756
1757         field = g_object_get_data (G_OBJECT (widget), "form-field");
1758
1759         if (field->changed) {
1760                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1761                 GdkRegion       *field_region;
1762
1763                 field_region = ev_view_form_field_get_region (view, field);
1764
1765                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
1766                                                             field, field_text->text);
1767                 field->changed = FALSE;
1768                 ev_pixbuf_cache_reload_page (view->pixbuf_cache,
1769                                              field_region,
1770                                              field->page->index,
1771                                              view->rotation,
1772                                              view->scale);
1773                 gdk_region_destroy (field_region);
1774         }
1775 }
1776
1777 static void
1778 ev_view_form_field_text_changed (GtkWidget   *widget,
1779                                  EvFormField *field)
1780 {
1781         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1782         gchar           *text = NULL;
1783
1784         if (GTK_IS_ENTRY (widget)) {
1785                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
1786         } else if (GTK_IS_TEXT_BUFFER (widget)) {
1787                 GtkTextIter start, end;
1788
1789                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
1790                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
1791                                                  &start, &end, FALSE);
1792         }
1793
1794         if (!field_text->text ||
1795             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
1796                 g_free (field_text->text);
1797                 field_text->text = text;
1798                 field->changed = TRUE;
1799         }
1800 }
1801
1802 static GtkWidget *
1803 ev_view_form_field_text_create_widget (EvView      *view,
1804                                        EvFormField *field)
1805 {
1806         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1807         GtkWidget       *text = NULL;
1808         gchar           *txt;
1809
1810         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
1811                                                           field);
1812
1813         switch (field_text->type) {
1814                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
1815                         /* TODO */
1816                 case EV_FORM_FIELD_TEXT_NORMAL:
1817                         text = gtk_entry_new ();
1818                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
1819                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
1820                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
1821
1822                         if (txt) {
1823                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
1824                                 g_free (txt);
1825                         }
1826
1827                         g_signal_connect (G_OBJECT (text), "changed",
1828                                           G_CALLBACK (ev_view_form_field_text_changed),
1829                                           field);
1830                         g_signal_connect_after (G_OBJECT (text), "activate",
1831                                                 G_CALLBACK (ev_view_form_field_destroy),
1832                                                 view);
1833                         break;
1834                 case EV_FORM_FIELD_TEXT_MULTILINE: {
1835                         GtkTextBuffer *buffer;
1836
1837                         text = gtk_text_view_new ();
1838                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
1839
1840                         if (txt) {
1841                                 gtk_text_buffer_set_text (buffer, txt, -1);
1842                                 g_free (txt);
1843                         }
1844
1845                         g_signal_connect (G_OBJECT (buffer), "changed",
1846                                           G_CALLBACK (ev_view_form_field_text_changed),
1847                                           field);
1848                 }
1849                         break;
1850         }
1851
1852         g_object_weak_ref (G_OBJECT (text),
1853                            (GWeakNotify)ev_view_form_field_text_save,
1854                            view);
1855
1856         return text;
1857 }
1858
1859 static void
1860 ev_view_form_field_choice_save (EvView    *view,
1861                                 GtkWidget *widget)
1862 {
1863         EvFormField *field;
1864
1865         if (!view->document)
1866                 return;
1867
1868         field = g_object_get_data (G_OBJECT (widget), "form-field");
1869
1870         if (field->changed) {
1871                 GList             *l;
1872                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1873                 GdkRegion         *field_region;
1874
1875                 field_region = ev_view_form_field_get_region (view, field);
1876
1877                 if (field_choice->is_editable) {
1878                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
1879                                                                       field, field_choice->text);
1880                 } else {
1881                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
1882                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
1883                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
1884                                                                                  field,
1885                                                                                  GPOINTER_TO_INT (l->data));
1886                         }
1887                 }
1888                 field->changed = FALSE;
1889                 ev_pixbuf_cache_reload_page (view->pixbuf_cache,
1890                                              field_region,
1891                                              field->page->index,
1892                                              view->rotation,
1893                                              view->scale);
1894                 gdk_region_destroy (field_region);
1895         }
1896 }
1897
1898 static void
1899 ev_view_form_field_choice_changed (GtkWidget   *widget,
1900                                    EvFormField *field)
1901 {
1902         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1903
1904         if (GTK_IS_COMBO_BOX (widget)) {
1905                 gint item;
1906
1907                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
1908                 if (!field_choice->selected_items ||
1909                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
1910                         g_list_free (field_choice->selected_items);
1911                         field_choice->selected_items = NULL;
1912                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1913                                                                        GINT_TO_POINTER (item));
1914                         field->changed = TRUE;
1915                 }
1916
1917                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
1918                         gchar *text;
1919
1920                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
1921                         if (!field_choice->text ||
1922                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
1923                                 g_free (field_choice->text);
1924                                 field_choice->text = text;
1925                                 field->changed = TRUE;
1926                         }
1927                 }
1928         } else if (GTK_IS_TREE_SELECTION (widget)) {
1929                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
1930                 GtkTreeModel     *model;
1931                 GList            *items, *l;
1932
1933                 items = gtk_tree_selection_get_selected_rows (selection, &model);
1934                 g_list_free (field_choice->selected_items);
1935                 field_choice->selected_items = NULL;
1936
1937                 for (l = items; l && l->data; l = g_list_next (l)) {
1938                         GtkTreeIter  iter;
1939                         GtkTreePath *path = (GtkTreePath *)l->data;
1940                         gint         item;
1941
1942                         gtk_tree_model_get_iter (model, &iter, path);
1943                         gtk_tree_model_get (model, &iter, 1, &item, -1);
1944
1945                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1946                                                                        GINT_TO_POINTER (item));
1947
1948                         gtk_tree_path_free (path);
1949                 }
1950
1951                 g_list_free (items);
1952
1953                 field->changed = TRUE;
1954         }
1955 }
1956
1957 static GtkWidget *
1958 ev_view_form_field_choice_create_widget (EvView      *view,
1959                                          EvFormField *field)
1960 {
1961         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1962         GtkWidget         *choice;
1963         GtkTreeModel      *model;
1964         gint               n_items, i;
1965         gint               selected_item = 0;
1966
1967         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
1968                                                                    field);
1969         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
1970         for (i = 0; i < n_items; i++) {
1971                 GtkTreeIter iter;
1972                 gchar      *item;
1973
1974                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
1975                                                                      field, i);
1976                 if (ev_document_forms_form_field_choice_is_item_selected (
1977                             EV_DOCUMENT_FORMS (view->document), field, i)) {
1978                         selected_item = i;
1979                         /* FIXME: we need a get_selected_items function in poppler */
1980                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1981                                                                        GINT_TO_POINTER (i));
1982                 }
1983
1984                 if (item) {
1985                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
1986                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
1987                                             0, item,
1988                                             1, i,
1989                                             -1);
1990                         g_free (item);
1991                 }
1992         }
1993
1994         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
1995                 GtkCellRenderer  *renderer;
1996                 GtkWidget        *tree_view;
1997                 GtkTreeSelection *selection;
1998
1999                 tree_view = gtk_tree_view_new_with_model (model);
2000                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2001
2002                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2003                 if (field_choice->multi_select) {
2004                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2005                 }
2006
2007                 /* TODO: set selected items */
2008
2009                 renderer = gtk_cell_renderer_text_new ();
2010                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2011                                                              0,
2012                                                              "choix", renderer,
2013                                                              "text", 0,
2014                                                              NULL);
2015
2016                 choice = gtk_scrolled_window_new (NULL, NULL);
2017                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2018                                                 GTK_POLICY_AUTOMATIC,
2019                                                 GTK_POLICY_AUTOMATIC);
2020                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2021                 gtk_widget_show (tree_view);
2022
2023                 g_signal_connect (G_OBJECT (selection), "changed",
2024                                   G_CALLBACK (ev_view_form_field_choice_changed),
2025                                   field);
2026                 g_signal_connect_after (G_OBJECT (selection), "changed",
2027                                         G_CALLBACK (ev_view_form_field_destroy),
2028                                         view);
2029         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2030                 gchar *text;
2031
2032                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2033                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2034                 if (text) {
2035                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2036                         g_free (text);
2037                 }
2038
2039                 g_signal_connect (G_OBJECT (choice), "changed",
2040                                   G_CALLBACK (ev_view_form_field_choice_changed),
2041                                   field);
2042                 g_signal_connect_after (G_OBJECT (GTK_BIN (choice)->child), "activate",
2043                                         G_CALLBACK (ev_view_form_field_destroy),
2044                                         view);
2045         } else { /* ComboBoxText */
2046                 GtkCellRenderer *renderer;
2047
2048                 choice = gtk_combo_box_new_with_model (model);
2049                 renderer = gtk_cell_renderer_text_new ();
2050                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2051                                             renderer, TRUE);
2052                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2053                                                 renderer,
2054                                                 "text", 0,
2055                                                 NULL);
2056                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2057                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2058
2059                 g_signal_connect (G_OBJECT (choice), "changed",
2060                                   G_CALLBACK (ev_view_form_field_choice_changed),
2061                                   field);
2062                 g_signal_connect_after (G_OBJECT (choice), "changed",
2063                                         G_CALLBACK (ev_view_form_field_destroy),
2064                                         view);
2065         }
2066
2067         g_object_unref (model);
2068
2069         g_object_weak_ref (G_OBJECT (choice),
2070                            (GWeakNotify)ev_view_form_field_choice_save,
2071                            view);
2072
2073         return choice;
2074 }
2075
2076 static void
2077 ev_view_handle_form_field (EvView      *view,
2078                            EvFormField *field,
2079                            gdouble      x,
2080                            gdouble      y)
2081 {
2082         GtkWidget   *field_widget = NULL;
2083         GList       *form_field_mapping;
2084         EvRectangle  field_area;
2085         GdkRectangle view_area;
2086
2087         if (field->is_read_only)
2088                 return;
2089
2090         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2091                 field_widget = ev_view_form_field_button_create_widget (view, field);
2092         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2093                 field_widget = ev_view_form_field_text_create_widget (view, field);
2094         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2095                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2096         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2097                 /* TODO */
2098         }
2099
2100         /* Form field doesn't require a widget */
2101         if (!field_widget)
2102                 return;
2103
2104         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2105                                 g_object_ref (field),
2106                                 (GDestroyNotify)g_object_unref);
2107
2108         form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, field->page->index);
2109         ev_form_field_mapping_get_area (form_field_mapping, field, &field_area);
2110
2111         doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
2112         view_area.x -= view->scroll_x;
2113         view_area.y -= view->scroll_y;
2114
2115         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2116         gtk_widget_show (field_widget);
2117         gtk_widget_grab_focus (field_widget);
2118 }
2119
2120 /*** GtkWidget implementation ***/
2121
2122 static void
2123 ev_view_size_request_continuous_dual_page (EvView         *view,
2124                                            GtkRequisition *requisition)
2125 {
2126         int max_width;
2127         gint n_pages;
2128         GtkBorder border;
2129
2130         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2131                                      view->scale, &max_width);
2132         compute_border (view, max_width, max_width, &border);
2133
2134         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
2135
2136         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2137         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
2138
2139         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2140                 requisition->width = 1;
2141         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2142                 requisition->width = 1;
2143                 /* FIXME: This could actually be set on one page docs or docs
2144                  * with a strange aspect ratio. */
2145                 /* requisition->height = 1;*/
2146         }
2147 }
2148
2149 static void
2150 ev_view_size_request_continuous (EvView         *view,
2151                                  GtkRequisition *requisition)
2152 {
2153         int max_width;
2154         int n_pages;
2155         GtkBorder border;
2156
2157
2158         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2159                                      view->scale, &max_width);
2160         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2161         compute_border (view, max_width, max_width, &border);
2162
2163         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2164         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
2165
2166         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2167                 requisition->width = 1;
2168         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2169                 requisition->width = 1;
2170                 /* FIXME: This could actually be set on one page docs or docs
2171                  * with a strange aspect ratio. */
2172                 /* requisition->height = 1;*/
2173         }
2174 }
2175
2176 static void
2177 ev_view_size_request_dual_page (EvView         *view,
2178                                 GtkRequisition *requisition)
2179 {
2180         GtkBorder border;
2181         gint width, height;
2182
2183         /* Find the largest of the two. */
2184         ev_page_cache_get_size (view->page_cache,
2185                                 view->current_page,
2186                                 view->rotation,
2187                                 view->scale,
2188                                 &width, &height);
2189         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
2190                 gint width_2, height_2;
2191                 ev_page_cache_get_size (view->page_cache,
2192                                         view->current_page + 1,
2193                                         view->rotation,
2194                                         view->scale,
2195                                         &width_2, &height_2);
2196                 if (width_2 > width) {
2197                         width = width_2;
2198                         height = height_2;
2199                 }
2200         }
2201         compute_border (view, width, height, &border);
2202
2203         requisition->width = ((width + border.left + border.right) * 2) +
2204                 (view->spacing * 3);
2205         requisition->height = (height + border.top + border.bottom) +
2206                 (view->spacing * 2);
2207
2208         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2209                 requisition->width = 1;
2210         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2211                 requisition->width = 1;
2212                 requisition->height = 1;
2213         }
2214 }
2215
2216 static void
2217 ev_view_size_request_single_page (EvView         *view,
2218                                   GtkRequisition *requisition)
2219 {
2220         GtkBorder border;
2221         gint width, height;
2222
2223         ev_page_cache_get_size (view->page_cache,
2224                                 view->current_page,
2225                                 view->rotation,
2226                                 view->scale,
2227                                 &width, &height);
2228         compute_border (view, width, height, &border);
2229
2230         requisition->width = width + border.left + border.right + (2 * view->spacing);
2231         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2232
2233         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2234                 requisition->width = 1;
2235                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2236         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2237                 requisition->width = 1;
2238                 requisition->height = 1;
2239         }
2240 }
2241
2242 static void
2243 ev_view_size_request (GtkWidget      *widget,
2244                       GtkRequisition *requisition)
2245 {
2246         EvView *view = EV_VIEW (widget);
2247
2248         if (view->document == NULL) {
2249                 requisition->width = 1;
2250                 requisition->height = 1;
2251                 return;
2252         }
2253
2254         if (view->presentation) {
2255                 requisition->width = 1;
2256                 requisition->height = 1;
2257                 return;
2258         }
2259
2260         if (view->continuous && view->dual_page)
2261                 ev_view_size_request_continuous_dual_page (view, requisition);
2262         else if (view->continuous)
2263                 ev_view_size_request_continuous (view, requisition);
2264         else if (view->dual_page)
2265                 ev_view_size_request_dual_page (view, requisition);
2266         else
2267                 ev_view_size_request_single_page (view, requisition);
2268 }
2269
2270 static void
2271 ev_view_size_allocate (GtkWidget      *widget,
2272                        GtkAllocation  *allocation)
2273 {
2274         EvView *view = EV_VIEW (widget);
2275         GList  *children, *l;
2276
2277         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2278
2279         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2280             view->sizing_mode == EV_SIZING_BEST_FIT) {
2281
2282                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
2283
2284                 ev_view_size_request (widget, &widget->requisition);
2285         }
2286
2287         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2288         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2289
2290         if (view->document)
2291                 view_update_range_and_current_page (view);
2292
2293         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2294         view->pending_resize = FALSE;
2295
2296         children = gtk_container_get_children (GTK_CONTAINER (widget));
2297         for (l = children; l && l->data; l = g_list_next (l)) {
2298                 EvFormField   *field;
2299                 EvRectangle    field_area;
2300                 GdkRectangle   view_area;
2301                 GList         *form_field_mapping;
2302                 GtkAllocation  child_allocation;
2303                 GtkRequisition child_requisition;
2304                 GtkWidget     *child = (GtkWidget *)l->data;
2305
2306                 field = g_object_get_data (G_OBJECT (child), "form-field");
2307                 if (!field)
2308                         continue;
2309
2310                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2311                                                                              field->page->index);
2312                 ev_form_field_mapping_get_area (form_field_mapping, field, &field_area);
2313
2314                 doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
2315                 view_area.x -= view->scroll_x;
2316                 view_area.y -= view->scroll_y;
2317
2318                 gtk_widget_size_request (child, &child_requisition);
2319                 if (child_requisition.width != view_area.width ||
2320                     child_requisition.height != view_area.height)
2321                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2322
2323                 gtk_container_child_get (GTK_CONTAINER (widget),
2324                                          child,
2325                                          "x", &child_allocation.x,
2326                                          "y", &child_allocation.y,
2327                                          NULL);
2328                 if (child_allocation.x != view_area.x ||
2329                     child_allocation.y != view_area.y) {
2330                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2331                 }
2332         }
2333         g_list_free (children);
2334 }
2335
2336 static void
2337 ev_view_realize (GtkWidget *widget)
2338 {
2339         EvView *view = EV_VIEW (widget);
2340
2341         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
2342                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
2343
2344         gdk_window_set_events (view->layout.bin_window,
2345                                (gdk_window_get_events (view->layout.bin_window) |
2346                                 GDK_EXPOSURE_MASK |
2347                                 GDK_BUTTON_PRESS_MASK |
2348                                 GDK_BUTTON_RELEASE_MASK |
2349                                 GDK_SCROLL_MASK |
2350                                 GDK_KEY_PRESS_MASK |
2351                                 GDK_POINTER_MOTION_MASK |
2352                                 GDK_POINTER_MOTION_HINT_MASK |
2353                                 GDK_ENTER_NOTIFY_MASK |
2354                                 GDK_LEAVE_NOTIFY_MASK));
2355
2356         if (view->presentation)
2357                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
2358         else
2359                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
2360 }
2361
2362 static gboolean
2363 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
2364 {
2365         EvView *view = EV_VIEW (widget);
2366         guint state;
2367
2368         state = event->state & gtk_accelerator_get_default_mod_mask ();
2369
2370         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
2371                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
2372
2373                 if (event->direction == GDK_SCROLL_UP ||
2374                     event->direction == GDK_SCROLL_LEFT) {
2375                         if (ev_view_can_zoom_in (view)) {
2376                                 ev_view_zoom_in (view);
2377                         }
2378                 } else {
2379                         if (ev_view_can_zoom_out (view)) {
2380                                 ev_view_zoom_out (view);
2381                         }
2382                 }
2383
2384                 return TRUE;
2385         }
2386
2387         view->jump_to_find_result = FALSE;
2388
2389         /* Shift+Wheel scrolls the in the perpendicular direction */
2390         if (state & GDK_SHIFT_MASK) {
2391                 if (event->direction == GDK_SCROLL_UP)
2392                         event->direction = GDK_SCROLL_LEFT;
2393                 else if (event->direction == GDK_SCROLL_LEFT)
2394                         event->direction = GDK_SCROLL_UP;
2395                 else if (event->direction == GDK_SCROLL_DOWN)
2396                         event->direction = GDK_SCROLL_RIGHT;
2397                 else if (event->direction == GDK_SCROLL_RIGHT)
2398                         event->direction = GDK_SCROLL_DOWN;
2399
2400                 event->state &= ~GDK_SHIFT_MASK;
2401                 state &= ~GDK_SHIFT_MASK;
2402         }
2403
2404         if (state == 0 && view->presentation) {
2405                 switch (event->direction) {
2406                         case GDK_SCROLL_DOWN:
2407                         case GDK_SCROLL_RIGHT:
2408                                 ev_view_next_page (view);
2409                                 break;
2410                         case GDK_SCROLL_UP:
2411                         case GDK_SCROLL_LEFT:
2412                                 ev_view_previous_page (view);
2413                                 break;
2414                 }
2415
2416                 return TRUE;
2417         }
2418
2419         return FALSE;
2420 }
2421
2422 static EvViewSelection *
2423 find_selection_for_page (EvView *view,
2424                          gint    page)
2425 {
2426         GList *list;
2427
2428         for (list = view->selection_info.selections; list != NULL; list = list->next) {
2429                 EvViewSelection *selection;
2430
2431                 selection = (EvViewSelection *) list->data;
2432
2433                 if (selection->page == page)
2434                         return selection;
2435         }
2436
2437         return NULL;
2438 }
2439
2440 static void
2441 draw_end_presentation_page (EvView       *view,
2442                             GdkRectangle *page_area)
2443 {
2444         PangoLayout *layout;
2445         PangoFontDescription *font_desc;
2446         gchar *markup;
2447         const gchar *text = _("End of presentation. Press Escape to exit.");
2448
2449         if (view->presentation_state != EV_PRESENTATION_END)
2450                 return;
2451
2452         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
2453         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
2454         pango_layout_set_markup (layout, markup, -1);
2455         g_free (markup);
2456
2457         font_desc = pango_font_description_new ();
2458         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
2459         pango_layout_set_font_description (layout, font_desc);
2460
2461         gtk_paint_layout (GTK_WIDGET (view)->style,
2462                           view->layout.bin_window,
2463                           GTK_WIDGET_STATE (view),
2464                           FALSE,
2465                           page_area,
2466                           GTK_WIDGET (view),
2467                           NULL,
2468                           page_area->x + 15,
2469                           page_area->y + 15,
2470                           layout);
2471
2472         pango_font_description_free (font_desc);
2473         g_object_unref (layout);
2474 }
2475
2476 static gboolean
2477 ev_view_expose_event (GtkWidget      *widget,
2478                       GdkEventExpose *event)
2479 {
2480         EvView  *view = EV_VIEW (widget);
2481         cairo_t *cr;
2482         gint     i;
2483
2484         if (view->animation && ev_transition_animation_ready (view->animation)) {
2485                 GdkRectangle page_area;
2486                 GtkBorder    border;
2487
2488                 if (get_page_extents (view, view->current_page, &page_area, &border)) {
2489                         cr = gdk_cairo_create (view->layout.bin_window);
2490
2491                         /* normalize to x=0, y=0 */
2492                         cairo_translate (cr, page_area.x, page_area.y);
2493                         page_area.x = page_area.y = 0;
2494
2495                         ev_transition_animation_paint (view->animation, cr, page_area);
2496                         cairo_destroy (cr);
2497                 }
2498
2499                 return TRUE;
2500         }
2501
2502         if (view->presentation) {
2503                 switch (view->presentation_state) {
2504                         case EV_PRESENTATION_END: {
2505                                 GdkRectangle area = {0};
2506
2507                                 area.width = widget->allocation.width;
2508                                 area.height = widget->allocation.height;
2509
2510                                 draw_end_presentation_page (view, &area);
2511                         }
2512                                 return FALSE;
2513                         case EV_PRESENTATION_BLACK:
2514                         case EV_PRESENTATION_WHITE:
2515                                 return FALSE;
2516                         case EV_PRESENTATION_NORMAL:
2517                         default:
2518                                 break;
2519                 }
2520         } else if (view->loading) {
2521                 GdkRectangle area = {0};
2522
2523                 area.width = widget->allocation.width;
2524                 area.height = widget->allocation.height;
2525
2526                 draw_loading_text (view,
2527                                    &area,
2528                                    &(event->area));
2529         }
2530
2531         if (view->document == NULL)
2532                 return FALSE;
2533
2534         cr = gdk_cairo_create (view->layout.bin_window);
2535
2536         for (i = view->start_page; i <= view->end_page; i++) {
2537                 GdkRectangle page_area;
2538                 GtkBorder border;
2539                 gboolean page_ready = TRUE;
2540
2541                 if (!get_page_extents (view, i, &page_area, &border))
2542                         continue;
2543
2544                 page_area.x -= view->scroll_x;
2545                 page_area.y -= view->scroll_y;
2546
2547                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
2548
2549                 if (page_ready && EV_IS_DOCUMENT_FIND (view->document) && view->highlight_find_results)
2550                         highlight_find_results (view, i);
2551         }
2552
2553         cairo_destroy (cr);
2554
2555         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
2556                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
2557
2558         return FALSE;
2559 }
2560
2561 static gboolean
2562 ev_view_do_popup_menu (EvView *view,
2563                        gdouble x,
2564                        gdouble y)
2565 {
2566         EvLink  *link;
2567         EvImage *image;
2568
2569         image = ev_view_get_image_at_location (view, x, y);
2570         if (image) {
2571                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
2572                 return TRUE;
2573         }
2574
2575         link = ev_view_get_link_at_location (view, x, y);
2576         if (link) {
2577                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
2578                 return TRUE;
2579         }
2580
2581         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
2582
2583         return TRUE;
2584 }
2585
2586 static gboolean
2587 ev_view_popup_menu (GtkWidget *widget)
2588 {
2589         gint x, y;
2590
2591         gtk_widget_get_pointer (widget, &x, &y);
2592         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
2593 }
2594
2595 #if GTK_CHECK_VERSION (2, 11, 7)
2596 static void
2597 get_link_area (EvView       *view,
2598                gint          x,
2599                gint          y,
2600                EvLink       *link,
2601                GdkRectangle *area)
2602 {
2603         EvRectangle  ev_rect;
2604         GList       *link_mapping;
2605         gint         page;
2606         gint         x_offset = 0, y_offset = 0;
2607
2608         x += view->scroll_x;
2609         y += view->scroll_y;
2610
2611         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
2612
2613         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
2614         ev_link_mapping_get_area (link_mapping, link, &ev_rect);
2615
2616         doc_rect_to_view_rect (view, page, &ev_rect, area);
2617         area->y -= view->scroll_y ;
2618 }
2619
2620 static gboolean
2621 ev_view_query_tooltip (GtkWidget         *widget,
2622                        gint               x,
2623                        gint               y,
2624                        gboolean           keyboard_tip,
2625                        GtkTooltip        *tooltip)
2626 {
2627         EvView *view = EV_VIEW (widget);
2628         EvLink *link;
2629         gchar  *text;
2630
2631         link = ev_view_get_link_at_location (view, x, y);
2632         if (!link)
2633                 return FALSE;
2634
2635         text = tip_from_link (view, link);
2636         if (text && g_utf8_validate (text, -1, NULL)) {
2637                 GdkRectangle link_area;
2638
2639                 get_link_area (view, x, y, link, &link_area);
2640                 gtk_tooltip_set_text (tooltip, text);
2641                 gtk_tooltip_set_tip_area (tooltip, &link_area);
2642         }
2643         g_free (text);
2644
2645         return TRUE;
2646 }
2647 #endif /* GTK_CHECK_VERSION (2, 11, 7) */
2648
2649 static void
2650 start_selection_for_event (EvView         *view,
2651                            GdkEventButton *event)
2652 {
2653         EvSelectionStyle style;
2654
2655         clear_selection (view);
2656
2657         view->selection_info.start.x = event->x + view->scroll_x;
2658         view->selection_info.start.y = event->y + view->scroll_y;
2659
2660         switch (event->type) {
2661                 case GDK_2BUTTON_PRESS:
2662                         style = EV_SELECTION_STYLE_WORD;
2663                         break;
2664                 case GDK_3BUTTON_PRESS:
2665                         style = EV_SELECTION_STYLE_LINE;
2666                         break;
2667                 default:
2668                         style = EV_SELECTION_STYLE_GLYPH;
2669                         break;
2670         }
2671
2672         view->selection_info.style = style;
2673 }
2674
2675 static gboolean
2676 ev_view_button_press_event (GtkWidget      *widget,
2677                             GdkEventButton *event)
2678 {
2679         EvView *view = EV_VIEW (widget);
2680
2681         if (!view->document)
2682                 return FALSE;
2683
2684         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
2685                 gtk_widget_grab_focus (widget);
2686         }
2687
2688         view->pressed_button = event->button;
2689         view->selection_info.in_drag = FALSE;
2690
2691         if (view->scroll_info.autoscrolling)
2692                 return TRUE;
2693
2694         switch (event->button) {
2695                 case 1: {
2696                         EvImage *image;
2697                         EvFormField *field;
2698
2699                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
2700                                 if (event->type == GDK_3BUTTON_PRESS) {
2701                                         start_selection_for_event (view, event);
2702                                 } else if (location_in_selected_text (view,
2703                                                                event->x + view->scroll_x,
2704                                                                event->y + view->scroll_y)) {
2705                                         view->selection_info.in_drag = TRUE;
2706                                 } else {
2707                                         start_selection_for_event (view, event);
2708                                 }
2709
2710                                 gtk_widget_queue_draw (widget);
2711                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
2712                                 ev_view_remove_all (view);
2713                                 ev_view_handle_form_field (view, field, event->x, event->y);
2714                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
2715                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
2716                                 if (view->image_dnd_info.image)
2717                                         g_object_unref (view->image_dnd_info.image);
2718                                 view->image_dnd_info.image = g_object_ref (image);
2719                                 view->image_dnd_info.in_drag = TRUE;
2720
2721                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
2722                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
2723                         } else {
2724                                 ev_view_remove_all (view);
2725
2726                                 if (EV_IS_SELECTION (view->document))
2727                                         start_selection_for_event (view, event);
2728                         }
2729                 }
2730                         return TRUE;
2731                 case 2:
2732                         /* use root coordinates as reference point because
2733                          * scrolling changes window relative coordinates */
2734                         view->drag_info.start.x = event->x_root;
2735                         view->drag_info.start.y = event->y_root;
2736                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
2737                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
2738
2739                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
2740
2741                         return TRUE;
2742                 case 3:
2743                         view->scroll_info.start_y = event->y;
2744                         return ev_view_do_popup_menu (view, event->x, event->y);
2745         }
2746
2747         return FALSE;
2748 }
2749
2750 static void
2751 ev_view_remove_all (EvView *view)
2752 {
2753         GList *children, *child;
2754
2755         children = gtk_container_get_children (GTK_CONTAINER (view));
2756         for (child = children; child && child->data; child = g_list_next (child)) {
2757                 gtk_container_remove (GTK_CONTAINER (view),
2758                                       GTK_WIDGET (child->data));
2759         }
2760         g_list_free (children);
2761 }
2762
2763 /*** Drag and Drop ***/
2764 static void
2765 ev_view_drag_data_get (GtkWidget        *widget,
2766                        GdkDragContext   *context,
2767                        GtkSelectionData *selection_data,
2768                        guint             info,
2769                        guint             time)
2770 {
2771         EvView *view = EV_VIEW (widget);
2772
2773         switch (info) {
2774                 case TARGET_DND_TEXT:
2775                         if (EV_IS_SELECTION (view->document) &&
2776                             view->selection_info.selections) {
2777                                 gchar *text;
2778
2779                                 text = get_selected_text (view);
2780                                 gtk_selection_data_set_text (selection_data,
2781                                                              text,
2782                                                              strlen (text));
2783                                 g_free (text);
2784                         }
2785                         break;
2786                 case TARGET_DND_IMAGE:
2787                         if (view->image_dnd_info.image) {
2788                                 GdkPixbuf *pixbuf;
2789
2790                                 ev_document_doc_mutex_lock ();
2791                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
2792                                                                        view->image_dnd_info.image);
2793                                 ev_document_doc_mutex_unlock ();
2794
2795                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
2796                                 g_object_unref (pixbuf);
2797                         }
2798                         break;
2799                 case TARGET_DND_URI:
2800                         if (view->image_dnd_info.image) {
2801                                 GdkPixbuf   *pixbuf;
2802                                 const gchar *tmp_uri;
2803                                 gchar      **uris;
2804
2805                                 ev_document_doc_mutex_lock ();
2806                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
2807                                                                        view->image_dnd_info.image);
2808                                 ev_document_doc_mutex_unlock ();
2809
2810                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
2811                                 g_object_unref (pixbuf);
2812
2813                                 uris = g_new0 (gchar *, 2);
2814                                 uris[0] = (gchar *)tmp_uri;
2815
2816                                 gtk_selection_data_set_uris (selection_data, uris);
2817
2818                                 /* g_free instead of g_strfreev since tmp_uri is const */
2819                                 g_free (uris);
2820                         }
2821         }
2822 }
2823
2824 static gboolean
2825 ev_view_drag_motion (GtkWidget      *widget,
2826                      GdkDragContext *context,
2827                      gint            x,
2828                      gint            y,
2829                      guint           time)
2830 {
2831         if (gtk_drag_get_source_widget (context) == widget)
2832                 gdk_drag_status (context, 0, time);
2833         else
2834                 gdk_drag_status (context, context->suggested_action, time);
2835
2836         return TRUE;
2837 }
2838
2839 static void
2840 ev_view_drag_data_received (GtkWidget          *widget,
2841                             GdkDragContext     *context,
2842                             gint                x,
2843                             gint                y,
2844                             GtkSelectionData   *selection_data,
2845                             guint               info,
2846                             guint               time)
2847 {
2848         gchar  **uris;
2849         gint     i = 0;
2850         GSList  *uri_list = NULL;
2851
2852         uris = gtk_selection_data_get_uris (selection_data);
2853         if (!uris) {
2854                 gtk_drag_finish (context, FALSE, FALSE, time);
2855                 return;
2856         }
2857
2858         for (i = 0; uris[i]; i++) {
2859                 uri_list = g_slist_prepend (uri_list, (gpointer) uris[i]);
2860         }
2861
2862         ev_application_open_uri_list (EV_APP, uri_list,
2863                                       gtk_widget_get_screen (widget),
2864                                       0);
2865         gtk_drag_finish (context, TRUE, FALSE, time);
2866
2867         g_strfreev (uris);
2868         g_slist_free (uri_list);
2869 }
2870
2871
2872 static gboolean
2873 selection_update_idle_cb (EvView *view)
2874 {
2875         compute_selections (view,
2876                             view->selection_info.style,
2877                             &view->selection_info.start,
2878                             &view->motion);
2879         view->selection_update_id = 0;
2880         return FALSE;
2881 }
2882
2883 static gboolean
2884 selection_scroll_timeout_cb (EvView *view)
2885 {
2886         gint x, y, shift = 0;
2887         GtkWidget *widget = GTK_WIDGET (view);
2888
2889         gtk_widget_get_pointer (widget, &x, &y);
2890
2891         if (y > widget->allocation.height) {
2892                 shift = (y - widget->allocation.height) / 2;
2893         } else if (y < 0) {
2894                 shift = y / 2;
2895         }
2896
2897         if (shift)
2898                 gtk_adjustment_set_value (view->vadjustment,
2899                                           CLAMP (view->vadjustment->value + shift,
2900                                           view->vadjustment->lower,
2901                                           view->vadjustment->upper -
2902                                           view->vadjustment->page_size));
2903
2904         if (x > widget->allocation.width) {
2905                 shift = (x - widget->allocation.width) / 2;
2906         } else if (x < 0) {
2907                 shift = x / 2;
2908         }
2909
2910         if (shift)
2911                 gtk_adjustment_set_value (view->hadjustment,
2912                                           CLAMP (view->hadjustment->value + shift,
2913                                           view->hadjustment->lower,
2914                                           view->hadjustment->upper -
2915                                           view->hadjustment->page_size));
2916
2917         return TRUE;
2918 }
2919
2920 static gboolean
2921 ev_view_drag_update_momentum (EvView *view)
2922 {
2923         int i;
2924         if (!view->drag_info.in_drag)
2925                 return FALSE;
2926
2927         for (i = DRAG_HISTORY - 1; i > 0; i--) {
2928                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
2929                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
2930         }
2931
2932         /* Momentum is a moving average of 10ms granularity over
2933          * the last 100ms with each 10ms stored in buffer.
2934          */
2935
2936         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
2937         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
2938
2939         return TRUE;
2940 }
2941
2942 static gboolean
2943 ev_view_scroll_drag_release (EvView *view)
2944 {
2945         gdouble dhadj_value, dvadj_value;
2946         gdouble oldhadjustment, oldvadjustment;
2947
2948         view->drag_info.momentum.x /= 1.2;
2949         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
2950
2951         dhadj_value = view->hadjustment->page_size *
2952                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
2953         dvadj_value = view->vadjustment->page_size *
2954                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
2955
2956         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
2957         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
2958
2959         if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
2960            ((oldhadjustment + dhadj_value) < 0))
2961                 view->drag_info.momentum.x *= -0.5; /* 0.5 rather than 1 means the edges absorb some momentum */
2962         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
2963            ((oldvadjustment + dvadj_value) < 0))
2964                 view->drag_info.momentum.y *= -0.5;
2965
2966         gtk_adjustment_set_value (view->hadjustment,
2967                                 MIN (oldhadjustment + dhadj_value,
2968                                 view->hadjustment->upper - view->hadjustment->page_size));
2969         gtk_adjustment_set_value (view->vadjustment,
2970                                 MIN (oldvadjustment + dvadj_value,
2971                                 view->vadjustment->upper - view->vadjustment->page_size));
2972
2973         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
2974            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
2975                 return FALSE;
2976         else
2977                 return TRUE;
2978 }
2979
2980 static gboolean
2981 ev_view_motion_notify_event (GtkWidget      *widget,
2982                              GdkEventMotion *event)
2983 {
2984         EvView *view = EV_VIEW (widget);
2985         gint x, y;
2986
2987         if (!view->document)
2988                 return FALSE;
2989
2990
2991         if (event->is_hint || event->window != view->layout.bin_window) {
2992             gtk_widget_get_pointer (widget, &x, &y);
2993         } else {
2994             x = event->x;
2995             y = event->y;
2996         }
2997
2998         if (view->scroll_info.autoscrolling) {
2999                 view->scroll_info.last_y = y;
3000                 return TRUE;
3001         }
3002
3003         if (view->selection_info.in_drag) {
3004                 if (gtk_drag_check_threshold (widget,
3005                                               view->selection_info.start.x,
3006                                               view->selection_info.start.y,
3007                                               x, y)) {
3008                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3009
3010                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3011
3012                         gtk_drag_begin (widget, target_list,
3013                                         GDK_ACTION_COPY,
3014                                         1, (GdkEvent *)event);
3015
3016                         view->selection_info.in_drag = FALSE;
3017
3018                         gtk_target_list_unref (target_list);
3019
3020                         return TRUE;
3021                 }
3022         } else if (view->image_dnd_info.in_drag) {
3023                 if (gtk_drag_check_threshold (widget,
3024                                               view->selection_info.start.x,
3025                                               view->selection_info.start.y,
3026                                               x, y)) {
3027                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3028
3029                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3030                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3031
3032                         gtk_drag_begin (widget, target_list,
3033                                         GDK_ACTION_COPY,
3034                                         1, (GdkEvent *)event);
3035
3036                         view->image_dnd_info.in_drag = FALSE;
3037
3038                         gtk_target_list_unref (target_list);
3039
3040                         return TRUE;
3041                 }
3042         }
3043
3044         /* For the Evince 0.4.x release, we limit selection to un-rotated
3045          * documents only.
3046          */
3047         if (view->pressed_button == 1 && view->rotation == 0) {
3048
3049                 /* Schedule timeout to scroll during selection and additionally
3050                  * scroll once to allow arbitrary speed. */
3051                 if (!view->selection_scroll_id)
3052                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME, (GSourceFunc)selection_scroll_timeout_cb, view);
3053                 else
3054                     selection_scroll_timeout_cb (view);
3055
3056                 view->selection_info.in_selection = TRUE;
3057                 view->motion.x = x + view->scroll_x;
3058                 view->motion.y = y + view->scroll_y;
3059
3060                 /* Queue an idle to handle the motion.  We do this because
3061                  * handling any selection events in the motion could be slower
3062                  * than new motion events reach us.  We always put it in the
3063                  * idle to make sure we catch up and don't visibly lag the
3064                  * mouse. */
3065                 if (!view->selection_update_id)
3066                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3067
3068                 return TRUE;
3069         } else if (view->pressed_button == 2) {
3070                 if (!view->drag_info.in_drag) {
3071                         gboolean start;
3072                         int i;
3073
3074                         start = gtk_drag_check_threshold (widget,
3075                                                           view->drag_info.start.x,
3076                                                           view->drag_info.start.y,
3077                                                           event->x_root,
3078                                                           event->y_root);
3079                         view->drag_info.in_drag = start;
3080                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3081                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3082                         /* Set 100 to choose how long it takes to build up momentum */
3083                         /* Clear out previous momentum info: */
3084                         for (i = 0; i < DRAG_HISTORY; i++) {
3085                                 view->drag_info.buffer[i].x = event->x;
3086                                 view->drag_info.buffer[i].y = event->y;
3087                         }
3088                         view->drag_info.momentum.x = 0;
3089                         view->drag_info.momentum.y = 0;
3090                 }
3091
3092                 if (view->drag_info.in_drag) {
3093                         int dx, dy;
3094                         gdouble dhadj_value, dvadj_value;
3095
3096                         view->drag_info.buffer[0].x = event->x;
3097                         view->drag_info.buffer[0].y = event->y;
3098
3099                         dx = event->x_root - view->drag_info.start.x;
3100                         dy = event->y_root - view->drag_info.start.y;
3101
3102                         dhadj_value = view->hadjustment->page_size *
3103                                       (gdouble)dx / widget->allocation.width;
3104                         dvadj_value = view->vadjustment->page_size *
3105                                       (gdouble)dy / widget->allocation.height;
3106
3107                         /* clamp scrolling to visible area */
3108                         gtk_adjustment_set_value (view->hadjustment,
3109                                                   MIN(view->drag_info.hadj - dhadj_value,
3110                                                       view->hadjustment->upper -
3111                                                       view->hadjustment->page_size));
3112                         gtk_adjustment_set_value (view->vadjustment,
3113                                                   MIN(view->drag_info.vadj - dvadj_value,
3114                                                       view->vadjustment->upper -
3115                                                       view->vadjustment->page_size));
3116
3117                         return TRUE;
3118                 }
3119         } else if (view->pressed_button <= 0) {
3120                 ev_view_handle_cursor_over_xy (view, x, y);
3121                 return TRUE;
3122         }
3123
3124         return FALSE;
3125 }
3126
3127 static gboolean
3128 ev_view_button_release_event (GtkWidget      *widget,
3129                               GdkEventButton *event)
3130 {
3131         EvView *view = EV_VIEW (widget);
3132         EvLink *link = NULL;
3133
3134         view->image_dnd_info.in_drag = FALSE;
3135
3136         if (view->scroll_info.autoscrolling) {
3137                 ev_view_autoscroll_stop (view);
3138                 view->pressed_button = -1;
3139
3140                 return TRUE;
3141         }
3142
3143         if (view->drag_info.in_drag) {
3144                 view->drag_info.release_timeout_id =
3145                         g_timeout_add (20,
3146                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3147         }
3148
3149         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3150                 link = ev_view_get_link_at_location (view, event->x, event->y);
3151         }
3152
3153         view->drag_info.in_drag = FALSE;
3154
3155         if (view->pressed_button == 2) {
3156                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3157         }
3158
3159         view->pressed_button = -1;
3160
3161         if (view->selection_scroll_id) {
3162             g_source_remove (view->selection_scroll_id);
3163             view->selection_scroll_id = 0;
3164         }
3165         if (view->selection_update_id) {
3166             g_source_remove (view->selection_update_id);
3167             view->selection_update_id = 0;
3168         }
3169
3170         if (!view->selection_info.in_selection &&
3171             view->selection_info.style != EV_SELECTION_STYLE_GLYPH) {
3172                 compute_selections (view,
3173                                     view->selection_info.style,
3174                                     &(view->selection_info.start),
3175                                     &(view->selection_info.start));
3176         }
3177
3178         if (view->selection_info.selections) {
3179                 clear_link_selected (view);
3180                 ev_view_update_primary_selection (view);
3181
3182                 if (view->selection_info.in_drag) {
3183                         clear_selection (view);
3184                         gtk_widget_queue_draw (widget);
3185                 }
3186
3187                 view->selection_info.in_drag = FALSE;
3188         } else if (link) {
3189                 if (event->button == 2) {
3190                         EvLinkAction    *action;
3191                         EvLinkActionType type;
3192
3193                         action = ev_link_get_action (link);
3194                         if (!action)
3195                                 return FALSE;
3196
3197                         type = ev_link_action_get_action_type (action);
3198                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3199                                 g_signal_emit (view,
3200                                                signals[SIGNAL_EXTERNAL_LINK],
3201                                                0, action);
3202                         }
3203                 } else {
3204                         ev_view_handle_link (view, link);
3205                 }
3206         } else if (view->presentation) {
3207                 switch (event->button) {
3208                         case 1:
3209                                 ev_view_next_page (view);
3210                                 return TRUE;
3211                         case 3:
3212                                 ev_view_previous_page (view);
3213                                 return TRUE;
3214                 }
3215         }
3216
3217         return FALSE;
3218 }
3219
3220 /* Goto Window */
3221 /* Cut and paste from gtkwindow.c */
3222 static void
3223 send_focus_change (GtkWidget *widget,
3224                    gboolean   in)
3225 {
3226         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3227
3228         g_object_ref (widget);
3229
3230         if (in)
3231                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3232         else
3233                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3234
3235         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3236         fevent->focus_change.window = g_object_ref (widget->window);
3237         fevent->focus_change.in = in;
3238
3239         gtk_widget_event (widget, fevent);
3240
3241         g_object_notify (G_OBJECT (widget), "has-focus");
3242
3243         g_object_unref (widget);
3244         gdk_event_free (fevent);
3245 }
3246
3247 static void
3248 ev_view_goto_window_hide (EvView *view)
3249 {
3250         /* send focus-in event */
3251         send_focus_change (view->goto_entry, FALSE);
3252         gtk_widget_hide (view->goto_window);
3253         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3254 }
3255
3256 static gboolean
3257 ev_view_goto_window_delete_event (GtkWidget   *widget,
3258                                   GdkEventAny *event,
3259                                   EvView      *view)
3260 {
3261         ev_view_goto_window_hide (view);
3262
3263         return TRUE;
3264 }
3265
3266 static gboolean
3267 key_is_numeric (guint keyval)
3268 {
3269         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3270                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3271 }
3272
3273 static gboolean
3274 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3275                                      GdkEventKey *event,
3276                                      EvView      *view)
3277 {
3278         switch (event->keyval) {
3279                 case GDK_Escape:
3280                 case GDK_Tab:
3281                 case GDK_KP_Tab:
3282                 case GDK_ISO_Left_Tab:
3283                         ev_view_goto_window_hide (view);
3284                         return TRUE;
3285                 case GDK_Return:
3286                 case GDK_KP_Enter:
3287                 case GDK_ISO_Enter:
3288                 case GDK_BackSpace:
3289                 case GDK_Delete:
3290                         return FALSE;
3291                 default:
3292                         if (!key_is_numeric (event->keyval))
3293                                 return TRUE;
3294         }
3295
3296         return FALSE;
3297 }
3298
3299 static gboolean
3300 ev_view_goto_window_button_press_event (GtkWidget      *widget,
3301                                         GdkEventButton *event,
3302                                         EvView         *view)
3303 {
3304         ev_view_goto_window_hide (view);
3305
3306         return TRUE;
3307 }
3308
3309 static void
3310 ev_view_goto_entry_activate (GtkEntry *entry,
3311                              EvView   *view)
3312 {
3313         const gchar *text;
3314         gint         page;
3315
3316         text = gtk_entry_get_text (entry);
3317         page = atoi (text) - 1;
3318
3319         ev_view_goto_window_hide (view);
3320
3321         if (page >= 0 &&
3322             page < ev_page_cache_get_n_pages (view->page_cache))
3323                 ev_page_cache_set_current_page (view->page_cache, page);
3324 }
3325
3326 static void
3327 ev_view_goto_window_create (EvView *view)
3328 {
3329         GtkWidget *frame, *hbox, *toplevel, *label;
3330
3331         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
3332
3333         if (view->goto_window) {
3334                 if (GTK_WINDOW (toplevel)->group)
3335                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3336                                                      GTK_WINDOW (view->goto_window));
3337                 else if (GTK_WINDOW (view->goto_window)->group)
3338                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
3339                                                         GTK_WINDOW (view->goto_window));
3340                 return;
3341         }
3342
3343         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
3344
3345         if (GTK_WINDOW (toplevel)->group)
3346                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3347                                              GTK_WINDOW (view->goto_window));
3348
3349         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
3350
3351         g_signal_connect (view->goto_window, "delete_event",
3352                           G_CALLBACK (ev_view_goto_window_delete_event),
3353                           view);
3354         g_signal_connect (view->goto_window, "key_press_event",
3355                           G_CALLBACK (ev_view_goto_window_key_press_event),
3356                           view);
3357         g_signal_connect (view->goto_window, "button_press_event",
3358                           G_CALLBACK (ev_view_goto_window_button_press_event),
3359                           view);
3360
3361         frame = gtk_frame_new (NULL);
3362         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
3363         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
3364         gtk_widget_show (frame);
3365
3366         hbox = gtk_hbox_new (FALSE, 0);
3367         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
3368         gtk_container_add (GTK_CONTAINER (frame), hbox);
3369         gtk_widget_show (hbox);
3370
3371         label = gtk_label_new(_("Jump to page:"));
3372         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
3373         gtk_widget_show (label);
3374         gtk_widget_realize (label);
3375
3376         view->goto_entry = gtk_entry_new ();
3377         g_signal_connect (view->goto_entry, "activate",
3378                           G_CALLBACK (ev_view_goto_entry_activate),
3379                           view);
3380         gtk_box_pack_start_defaults (GTK_BOX (hbox), view->goto_entry);
3381         gtk_widget_show (view->goto_entry);
3382         gtk_widget_realize (view->goto_entry);
3383 }
3384
3385 static void
3386 ev_view_goto_entry_grab_focus (EvView *view)
3387 {
3388         GtkWidgetClass *entry_parent_class;
3389
3390         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
3391         (entry_parent_class->grab_focus) (view->goto_entry);
3392
3393         send_focus_change (view->goto_entry, TRUE);
3394 }
3395
3396 static void
3397 ev_view_goto_window_send_key_event (EvView   *view,
3398                                     GdkEvent *event)
3399 {
3400         GdkEventKey *new_event;
3401         GdkScreen   *screen;
3402
3403         /* Move goto window off screen */
3404         screen = gtk_widget_get_screen (GTK_WIDGET (view));
3405         gtk_window_move (GTK_WINDOW (view->goto_window),
3406                          gdk_screen_get_width (screen) + 1,
3407                          gdk_screen_get_height (screen) + 1);
3408         gtk_widget_show (view->goto_window);
3409
3410         new_event = (GdkEventKey *) gdk_event_copy (event);
3411         g_object_unref (new_event->window);
3412         new_event->window = g_object_ref (view->goto_window->window);
3413         gtk_widget_realize (view->goto_window);
3414
3415         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
3416         gdk_event_free ((GdkEvent *)new_event);
3417         gtk_widget_hide (view->goto_window);
3418 }
3419
3420 static gboolean
3421 ev_view_key_press_event (GtkWidget   *widget,
3422                          GdkEventKey *event)
3423 {
3424         EvView *view = EV_VIEW (widget);
3425         EvPresentationState current;
3426
3427         if (!view->document)
3428                 return FALSE;
3429
3430         if (!view->presentation ||
3431             view->presentation_state == EV_PRESENTATION_END)
3432                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3433
3434
3435         current = view->presentation_state;
3436
3437         switch (event->keyval) {
3438                 case GDK_b:
3439                 case GDK_B:
3440                 case GDK_period:
3441                 case GDK_KP_Decimal:
3442                         view->presentation_state =
3443                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
3444                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
3445                         break;
3446                 case GDK_w:
3447                 case GDK_W:
3448                         view->presentation_state =
3449                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
3450                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
3451                         break;
3452                 default:
3453                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
3454                             view->presentation_state == EV_PRESENTATION_WHITE) {
3455                                 view->presentation_state = EV_PRESENTATION_NORMAL;
3456                         }
3457         }
3458
3459         if (current == view->presentation_state) {
3460                 if (ev_page_cache_get_n_pages (view->page_cache) > 1 &&
3461                     key_is_numeric (event->keyval)) {
3462                         gint x, y;
3463
3464                         ev_view_goto_window_create (view);
3465                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
3466                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
3467                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
3468                         gtk_widget_show (view->goto_window);
3469                         ev_view_goto_entry_grab_focus (view);
3470
3471                         return TRUE;
3472                 }
3473
3474                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3475         }
3476
3477         switch (view->presentation_state) {
3478                 case EV_PRESENTATION_NORMAL:
3479                 case EV_PRESENTATION_BLACK:
3480                         gdk_window_set_background (view->layout.bin_window,
3481                                                    &widget->style->black);
3482                         break;
3483                 case EV_PRESENTATION_WHITE:
3484                         gdk_window_set_background (view->layout.bin_window,
3485                                                    &widget->style->white);
3486                         break;
3487                 default:
3488                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3489         }
3490
3491         gtk_widget_queue_draw (widget);
3492         return TRUE;
3493 }
3494
3495 static gint
3496 ev_view_focus_in (GtkWidget     *widget,
3497                   GdkEventFocus *event)
3498 {
3499         if (EV_VIEW (widget)->pixbuf_cache)
3500                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3501         gtk_widget_queue_draw (widget);
3502
3503         return FALSE;
3504 }
3505
3506 static gint
3507 ev_view_focus_out (GtkWidget     *widget,
3508                      GdkEventFocus *event)
3509 {
3510         if (EV_VIEW (widget)->goto_window)
3511                 ev_view_goto_window_hide (EV_VIEW (widget));
3512
3513         if (EV_VIEW (widget)->pixbuf_cache)
3514                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3515         gtk_widget_queue_draw (widget);
3516
3517         return FALSE;
3518 }
3519
3520 static gboolean
3521 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3522 {
3523         EvView *view = EV_VIEW (widget);
3524
3525         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
3526                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3527
3528 #if !GTK_CHECK_VERSION (2, 11, 7)
3529         if (view->link_tooltip) {
3530                 view->hovered_link = NULL;
3531                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
3532         }
3533 #endif
3534
3535         return FALSE;
3536 }
3537
3538 static gboolean
3539 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3540 {
3541         EvView *view = EV_VIEW (widget);
3542
3543         ev_view_handle_cursor_over_xy (view, event->x, event->y);
3544
3545         return FALSE;
3546 }
3547
3548 static void
3549 ev_view_style_set (GtkWidget *widget,
3550                    GtkStyle  *old_style)
3551 {
3552         if (EV_VIEW (widget)->pixbuf_cache)
3553                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3554
3555         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
3556 }
3557
3558 /*** Drawing ***/
3559
3560 static guint32
3561 ev_gdk_color_to_rgb (const GdkColor *color)
3562 {
3563   guint32 result;
3564   result = (0xff0000 | (color->red & 0xff00));
3565   result <<= 8;
3566   result |= ((color->green & 0xff00) | (color->blue >> 8));
3567   return result;
3568 }
3569
3570 static void
3571 draw_rubberband (GtkWidget *widget, GdkWindow *window,
3572                  const GdkRectangle *rect, guchar alpha)
3573 {
3574         GdkGC *gc;
3575         GdkPixbuf *pixbuf;
3576         GdkColor *fill_color_gdk;
3577         guint fill_color;
3578
3579         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
3580         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
3581
3582         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
3583                                  rect->width, rect->height);
3584         gdk_pixbuf_fill (pixbuf, fill_color);
3585
3586         gdk_draw_pixbuf (window, NULL, pixbuf,
3587                          0, 0,
3588                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3589                          rect->width, rect->height,
3590                          GDK_RGB_DITHER_NONE,
3591                          0, 0);
3592
3593         g_object_unref (pixbuf);
3594
3595         gc = gdk_gc_new (window);
3596         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
3597         gdk_draw_rectangle (window, gc, FALSE,
3598                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3599                             rect->width - 1,
3600                             rect->height - 1);
3601         g_object_unref (gc);
3602
3603         gdk_color_free (fill_color_gdk);
3604 }
3605
3606
3607 static void
3608 highlight_find_results (EvView *view, int page)
3609 {
3610         EvDocumentFind *find;
3611         int i, results = 0;
3612
3613         find = EV_DOCUMENT_FIND (view->document);
3614
3615         results = ev_document_find_get_n_results (find, page);
3616
3617         for (i = 0; i < results; i++) {
3618                 EvRectangle rectangle;
3619                 GdkRectangle view_rectangle;
3620                 guchar alpha;
3621
3622                 if (i == view->find_result && page == view->current_page) {
3623                         alpha = 0x90;
3624                 } else {
3625                         alpha = 0x20;
3626                 }
3627
3628                 ev_document_find_get_result (find, page, i, &rectangle);
3629                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
3630                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
3631                                  &view_rectangle, alpha);
3632         }
3633 }
3634
3635 static void
3636 draw_loading_text (EvView       *view,
3637                    GdkRectangle *page_area,
3638                    GdkRectangle *expose_area)
3639 {
3640         cairo_t *cr;
3641         gint     width, height;
3642
3643         if (!view->loading_text) {
3644                 const gchar *loading_text = _("Loading...");
3645                 PangoLayout *layout;
3646                 PangoFontDescription *font_desc;
3647                 PangoRectangle logical_rect;
3648                 gint target_width;
3649                 gdouble real_scale;
3650
3651                 ev_document_fc_mutex_lock ();
3652
3653                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
3654
3655                 font_desc = pango_font_description_new ();
3656
3657                 /* We set the font to be 10 points, get the size, and scale appropriately */
3658                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
3659                 pango_layout_set_font_description (layout, font_desc);
3660                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
3661
3662                 target_width = MAX (page_area->width / 2, 1);
3663                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
3664                 pango_font_description_set_size (font_desc, (int)real_scale);
3665                 pango_layout_set_font_description (layout, font_desc);
3666                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
3667
3668                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
3669                                                                  logical_rect.width,
3670                                                                  logical_rect.height);
3671                 cr = cairo_create (view->loading_text);
3672                 cairo_set_source_rgb (cr,
3673                                       155 / (double)255,
3674                                       155 / (double)255,
3675                                       155 / (double)255);
3676                 pango_cairo_show_layout (cr, layout);
3677                 cairo_destroy (cr);
3678
3679                 pango_font_description_free (font_desc);
3680                 g_object_unref (layout);
3681
3682                 ev_document_fc_mutex_unlock ();
3683         }
3684
3685         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
3686         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
3687
3688         cr = gdk_cairo_create (view->layout.bin_window);
3689         cairo_translate (cr,
3690                          page_area->x + width,
3691                          page_area->y + height);
3692         cairo_set_source_surface (cr, view->loading_text, 0, 0);
3693         cairo_paint (cr);
3694         cairo_destroy (cr);
3695 }
3696
3697 static void
3698 draw_one_page (EvView       *view,
3699                gint          page,
3700                cairo_t      *cr,
3701                GdkRectangle *page_area,
3702                GtkBorder    *border,
3703                GdkRectangle *expose_area,
3704                gboolean     *page_ready)
3705 {
3706         GdkRectangle overlap;
3707         GdkRectangle real_page_area;
3708
3709         g_assert (view->document);
3710
3711         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
3712                 return;
3713
3714         /* Render the document itself */
3715         real_page_area = *page_area;
3716
3717         real_page_area.x += border->left;
3718         real_page_area.y += border->top;
3719         real_page_area.width -= (border->left + border->right);
3720         real_page_area.height -= (border->top + border->bottom);
3721         *page_ready = TRUE;
3722
3723         if (!view->presentation) {
3724                 gint current_page;
3725
3726                 current_page = ev_page_cache_get_current_page (view->page_cache);
3727                 ev_document_misc_paint_one_page (view->layout.bin_window,
3728                                                  GTK_WIDGET (view),
3729                                                  page_area, border,
3730                                                  page == current_page);
3731         }
3732
3733         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
3734                 gint             width, height;
3735                 gint             page_width, page_height;
3736                 cairo_surface_t *page_surface = NULL;
3737                 gint             selection_width, selection_height;
3738                 cairo_surface_t *selection_surface = NULL;
3739
3740                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
3741
3742                 if (!page_surface) {
3743                         if (!view->presentation) {
3744                                 draw_loading_text (view,
3745                                                    &real_page_area,
3746                                                    expose_area);
3747                         }
3748
3749                         *page_ready = FALSE;
3750
3751                         return;
3752                 }
3753
3754                 ev_page_cache_get_size (view->page_cache,
3755                                         page, view->rotation,
3756                                         view->scale,
3757                                         &width, &height);
3758
3759                 page_width = cairo_image_surface_get_width (page_surface);
3760                 page_height = cairo_image_surface_get_height (page_surface);
3761
3762                 cairo_save (cr);
3763                 cairo_translate (cr, overlap.x, overlap.y);
3764
3765                 if (width != page_width || height != page_height) {
3766                         cairo_pattern_set_filter (cairo_get_source (cr),
3767                                                   CAIRO_FILTER_FAST);
3768                         cairo_scale (cr,
3769                                      (gdouble)width / page_width,
3770                                      (gdouble)height / page_height);
3771                 }
3772
3773                 cairo_surface_set_device_offset (page_surface,
3774                                                  overlap.x - real_page_area.x,
3775                                                  overlap.y - real_page_area.y);
3776                 cairo_set_source_surface (cr, page_surface, 0, 0);
3777                 cairo_paint (cr);
3778                 cairo_restore (cr);
3779
3780                 /* Get the selection pixbuf iff we have something to draw */
3781                 if (find_selection_for_page (view, page) &&
3782                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
3783                         selection_surface =
3784                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
3785                                                                        page,
3786                                                                        view->scale,
3787                                                                        NULL);
3788                 }
3789
3790                 if (!selection_surface) {
3791                         return;
3792                 }
3793
3794                 selection_width = cairo_image_surface_get_width (selection_surface);
3795                 selection_height = cairo_image_surface_get_height (selection_surface);
3796
3797                 cairo_save (cr);
3798                 cairo_translate (cr, overlap.x, overlap.y);
3799
3800                 if (width != selection_width || height != selection_height) {
3801                         cairo_pattern_set_filter (cairo_get_source (cr),
3802                                                   CAIRO_FILTER_FAST);
3803                         cairo_scale (cr,
3804                                      (gdouble)width / selection_width,
3805                                      (gdouble)height / selection_height);
3806                 }
3807
3808                 cairo_surface_set_device_offset (selection_surface,
3809                                                  overlap.x - real_page_area.x,
3810                                                  overlap.y - real_page_area.y);
3811                 cairo_set_source_surface (cr, selection_surface, 0, 0);
3812                 cairo_paint (cr);
3813                 cairo_restore (cr);
3814         }
3815 }
3816
3817 /*** GObject functions ***/
3818
3819 static void
3820 ev_view_finalize (GObject *object)
3821 {
3822         EvView *view = EV_VIEW (object);
3823
3824         g_free (view->find_status);
3825
3826         clear_selection (view);
3827         clear_link_selected (view);
3828
3829         if (view->image_dnd_info.image)
3830                 g_object_unref (view->image_dnd_info.image);
3831         view->image_dnd_info.image = NULL;
3832
3833         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
3834 }
3835
3836 static void
3837 ev_view_destroy (GtkObject *object)
3838 {
3839         EvView *view = EV_VIEW (object);
3840
3841         if (view->document) {
3842                 g_object_unref (view->document);
3843                 view->document = NULL;
3844         }
3845
3846         if (view->pixbuf_cache) {
3847                 g_object_unref (view->pixbuf_cache);
3848                 view->pixbuf_cache = NULL;
3849         }
3850
3851 #if !GTK_CHECK_VERSION (2, 11, 7)
3852         if (view->link_tooltip) {
3853                 gtk_widget_destroy (view->link_tooltip);
3854                 view->link_tooltip = NULL;
3855         }
3856 #endif
3857         if (view->goto_window) {
3858                 gtk_widget_destroy (view->goto_window);
3859                 view->goto_window = NULL;
3860                 view->goto_entry = NULL;
3861         }
3862
3863         if (view->selection_scroll_id) {
3864             g_source_remove (view->selection_scroll_id);
3865             view->selection_scroll_id = 0;
3866         }
3867
3868         if (view->selection_update_id) {
3869             g_source_remove (view->selection_update_id);
3870             view->selection_update_id = 0;
3871         }
3872
3873         if (view->loading_text) {
3874                 cairo_surface_destroy (view->loading_text);
3875                 view->loading_text = NULL;
3876         }
3877
3878         if (view->scroll_info.timeout_id) {
3879             g_source_remove (view->scroll_info.timeout_id);
3880             view->scroll_info.timeout_id = 0;
3881         }
3882
3883         if (view->drag_info.drag_timeout_id) {
3884                 g_source_remove (view->drag_info.drag_timeout_id);
3885                 view->drag_info.drag_timeout_id = 0;
3886         }
3887
3888         if (view->drag_info.release_timeout_id) {
3889                 g_source_remove (view->drag_info.release_timeout_id);
3890                 view->drag_info.release_timeout_id = 0;
3891         }
3892
3893         ev_view_presentation_transition_stop (view);
3894
3895         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
3896
3897         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
3898 }
3899
3900 static void
3901 ev_view_set_property (GObject      *object,
3902                       guint         prop_id,
3903                       const GValue *value,
3904                       GParamSpec   *pspec)
3905 {
3906         EvView *view = EV_VIEW (object);
3907
3908         switch (prop_id) {
3909                 case PROP_CONTINUOUS:
3910                         ev_view_set_continuous (view, g_value_get_boolean (value));
3911                         break;
3912                 case PROP_DUAL_PAGE:
3913                         ev_view_set_dual_page (view, g_value_get_boolean (value));
3914                         break;
3915                 case PROP_FULLSCREEN:
3916                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
3917                         break;
3918                 case PROP_PRESENTATION:
3919                         ev_view_set_presentation (view, g_value_get_boolean (value));
3920                         break;
3921                 case PROP_SIZING_MODE:
3922                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
3923                         break;
3924                 case PROP_ZOOM:
3925                         ev_view_set_zoom (view, g_value_get_double (value), FALSE);
3926                         break;
3927                 case PROP_ROTATION:
3928                         ev_view_set_rotation (view, g_value_get_int (value));
3929                         break;
3930                 default:
3931                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
3932         }
3933 }
3934
3935 static AtkObject *
3936 ev_view_get_accessible (GtkWidget *widget)
3937 {
3938         static gboolean first_time = TRUE;
3939
3940         if (first_time) {
3941                 AtkObjectFactory *factory;
3942                 AtkRegistry *registry;
3943                 GType derived_type;
3944                 GType derived_atk_type;
3945
3946                 /*
3947                  * Figure out whether accessibility is enabled by looking at the
3948                  * type of the accessible object which would be created for
3949                  * the parent type of EvView.
3950                  */
3951                 derived_type = g_type_parent (EV_TYPE_VIEW);
3952
3953                 registry = atk_get_default_registry ();
3954                 factory = atk_registry_get_factory (registry,
3955                                                     derived_type);
3956                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
3957                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
3958                         atk_registry_set_factory_type (registry,
3959                                                        EV_TYPE_VIEW,
3960                                                        ev_view_accessible_factory_get_type ());
3961                 first_time = FALSE;
3962         }
3963         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
3964 }
3965
3966 static void
3967 ev_view_get_property (GObject *object,
3968                       guint prop_id,
3969                       GValue *value,
3970                       GParamSpec *pspec)
3971 {
3972         EvView *view = EV_VIEW (object);
3973
3974         switch (prop_id) {
3975                 case PROP_FIND_STATUS:
3976                         g_value_set_string (value, view->find_status);
3977                         break;
3978                 case PROP_CONTINUOUS:
3979                         g_value_set_boolean (value, view->continuous);
3980                         break;
3981                 case PROP_DUAL_PAGE:
3982                         g_value_set_boolean (value, view->dual_page);
3983                         break;
3984                 case PROP_FULLSCREEN:
3985                         g_value_set_boolean (value, view->fullscreen);
3986                         break;
3987                 case PROP_PRESENTATION:
3988                         g_value_set_boolean (value, view->presentation);
3989                         break;
3990                 case PROP_SIZING_MODE:
3991                         g_value_set_enum (value, view->sizing_mode);
3992                         break;
3993                 case PROP_ZOOM:
3994                         g_value_set_double (value, view->scale);
3995                         break;
3996                 case PROP_ROTATION:
3997                         g_value_set_int (value, view->rotation);
3998                         break;
3999                 case PROP_HAS_SELECTION:
4000                         g_value_set_boolean (value,
4001                                              view->selection_info.selections != NULL);
4002                         break;
4003                 default:
4004                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4005         }
4006 }
4007
4008 static void
4009 ev_view_class_init (EvViewClass *class)
4010 {
4011         GObjectClass *object_class = G_OBJECT_CLASS (class);
4012         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4013         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4014         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4015         GtkBindingSet *binding_set;
4016
4017         object_class->finalize = ev_view_finalize;
4018         object_class->set_property = ev_view_set_property;
4019         object_class->get_property = ev_view_get_property;
4020
4021         widget_class->expose_event = ev_view_expose_event;
4022         widget_class->button_press_event = ev_view_button_press_event;
4023         widget_class->motion_notify_event = ev_view_motion_notify_event;
4024         widget_class->button_release_event = ev_view_button_release_event;
4025         widget_class->key_press_event = ev_view_key_press_event;
4026         widget_class->focus_in_event = ev_view_focus_in;
4027         widget_class->focus_out_event = ev_view_focus_out;
4028         widget_class->get_accessible = ev_view_get_accessible;
4029         widget_class->size_request = ev_view_size_request;
4030         widget_class->size_allocate = ev_view_size_allocate;
4031         widget_class->realize = ev_view_realize;
4032         widget_class->scroll_event = ev_view_scroll_event;
4033         widget_class->enter_notify_event = ev_view_enter_notify_event;
4034         widget_class->leave_notify_event = ev_view_leave_notify_event;
4035         widget_class->style_set = ev_view_style_set;
4036         widget_class->drag_data_get = ev_view_drag_data_get;
4037         widget_class->drag_motion = ev_view_drag_motion;
4038         widget_class->drag_data_received = ev_view_drag_data_received;
4039         widget_class->popup_menu = ev_view_popup_menu;
4040 #if GTK_CHECK_VERSION (2, 11, 7)
4041         widget_class->query_tooltip = ev_view_query_tooltip;
4042 #endif
4043
4044         gtk_object_class->destroy = ev_view_destroy;
4045
4046         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4047
4048         class->binding_activated = ev_view_scroll;
4049
4050         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4051                          G_TYPE_FROM_CLASS (object_class),
4052                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4053                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4054                          NULL, NULL,
4055                          ev_marshal_VOID__ENUM_BOOLEAN,
4056                          G_TYPE_NONE, 2,
4057                          GTK_TYPE_SCROLL_TYPE,
4058                          G_TYPE_BOOLEAN);
4059
4060         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
4061                          G_TYPE_FROM_CLASS (object_class),
4062                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4063                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
4064                          NULL, NULL,
4065                          ev_marshal_VOID__VOID,
4066                          G_TYPE_NONE, 0, G_TYPE_NONE);
4067         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4068                          G_TYPE_FROM_CLASS (object_class),
4069                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4070                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4071                          NULL, NULL,
4072                          g_cclosure_marshal_VOID__OBJECT,
4073                          G_TYPE_NONE, 1,
4074                          G_TYPE_OBJECT);
4075         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4076                          G_TYPE_FROM_CLASS (object_class),
4077                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4078                          G_STRUCT_OFFSET (EvViewClass, external_link),
4079                          NULL, NULL,
4080                          g_cclosure_marshal_VOID__OBJECT,
4081                          G_TYPE_NONE, 1,
4082                          G_TYPE_OBJECT);
4083         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4084                          G_TYPE_FROM_CLASS (object_class),
4085                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4086                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4087                          NULL, NULL,
4088                          g_cclosure_marshal_VOID__OBJECT,
4089                          G_TYPE_NONE, 1,
4090                          G_TYPE_OBJECT);
4091
4092
4093         g_object_class_install_property (object_class,
4094                                          PROP_FIND_STATUS,
4095                                          g_param_spec_string ("find-status",
4096                                                               "Find Status Message",
4097                                                               "The find status message",
4098                                                               NULL,
4099                                                               G_PARAM_READABLE));
4100
4101         g_object_class_install_property (object_class,
4102                                          PROP_CONTINUOUS,
4103                                          g_param_spec_boolean ("continuous",
4104                                                                "Continuous",
4105                                                                "Continuous scrolling mode",
4106                                                                TRUE,
4107                                                                G_PARAM_READWRITE));
4108
4109         g_object_class_install_property (object_class,
4110                                          PROP_DUAL_PAGE,
4111                                          g_param_spec_boolean ("dual-page",
4112                                                                "Dual Page",
4113                                                                "Two pages visible at once",
4114                                                                FALSE,
4115                                                                G_PARAM_READWRITE));
4116         g_object_class_install_property (object_class,
4117                                          PROP_FULLSCREEN,
4118                                          g_param_spec_boolean ("fullscreen",
4119                                                                "Full Screen",
4120                                                                "Draw page in a fullscreen fashion",
4121                                                                FALSE,
4122                                                                G_PARAM_READWRITE));
4123         g_object_class_install_property (object_class,
4124                                          PROP_PRESENTATION,
4125                                          g_param_spec_boolean ("presentation",
4126                                                                "Presentation",
4127                                                                "Draw page in presentation mode",
4128                                                                TRUE,
4129                                                                G_PARAM_READWRITE));
4130
4131         g_object_class_install_property (object_class,
4132                                          PROP_SIZING_MODE,
4133                                          g_param_spec_enum ("sizing-mode",
4134                                                             "Sizing Mode",
4135                                                             "Sizing Mode",
4136                                                             EV_TYPE_SIZING_MODE,
4137                                                             EV_SIZING_FIT_WIDTH,
4138                                                             G_PARAM_READWRITE));
4139
4140         g_object_class_install_property (object_class,
4141                                          PROP_ZOOM,
4142                                          g_param_spec_double ("zoom",
4143                                                               "Zoom factor",
4144                                                               "Zoom factor",
4145                                                               0,
4146                                                               G_MAXDOUBLE,
4147                                                               1.0,
4148                                                               G_PARAM_READWRITE));
4149         g_object_class_install_property (object_class,
4150                                          PROP_ROTATION,
4151                                          g_param_spec_double ("rotation",
4152                                                               "Rotation",
4153                                                               "Rotation",
4154                                                               0,
4155                                                               360,
4156                                                               0,
4157                                                               G_PARAM_READWRITE));
4158         g_object_class_install_property (object_class,
4159                                          PROP_HAS_SELECTION,
4160                                          g_param_spec_boolean ("has-selection",
4161                                                                "Has selection",
4162                                                                "The view has selections",
4163                                                                FALSE,
4164                                                                G_PARAM_READABLE));
4165
4166         binding_set = gtk_binding_set_by_class (class);
4167
4168         add_scroll_binding_keypad (binding_set, GDK_Left,  0, EV_SCROLL_STEP_BACKWARD, TRUE);
4169         add_scroll_binding_keypad (binding_set, GDK_Right, 0, EV_SCROLL_STEP_FORWARD,  TRUE);
4170         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, EV_SCROLL_STEP_DOWN, TRUE);
4171         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, EV_SCROLL_STEP_UP,  TRUE);
4172         add_scroll_binding_keypad (binding_set, GDK_Up,    0, EV_SCROLL_STEP_BACKWARD, FALSE);
4173         add_scroll_binding_keypad (binding_set, GDK_Down,  0, EV_SCROLL_STEP_FORWARD,  FALSE);
4174         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, EV_SCROLL_STEP_DOWN, FALSE);
4175         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, EV_SCROLL_STEP_UP,  FALSE);
4176         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, EV_TYPE_SCROLL_TYPE,
4177                                       EV_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4178         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, EV_TYPE_SCROLL_TYPE,
4179                                       EV_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4180         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, EV_TYPE_SCROLL_TYPE,
4181                                       EV_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4182         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, EV_TYPE_SCROLL_TYPE,
4183                                       EV_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4184
4185 }
4186
4187 static void
4188 ev_view_init (EvView *view)
4189 {
4190         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4191
4192         view->spacing = 5;
4193         view->scale = 1.0;
4194         view->current_page = 0;
4195         view->pressed_button = -1;
4196         view->cursor = EV_VIEW_CURSOR_NORMAL;
4197         view->drag_info.in_drag = FALSE;
4198         view->scroll_info.autoscrolling = FALSE;
4199         view->selection_info.selections = NULL;
4200         view->selection_info.in_selection = FALSE;
4201         view->selection_info.in_drag = FALSE;
4202         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4203         view->continuous = TRUE;
4204         view->dual_page = FALSE;
4205         view->presentation = FALSE;
4206         view->presentation_state = EV_PRESENTATION_NORMAL;
4207         view->fullscreen = FALSE;
4208         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4209         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4210         view->jump_to_find_result = TRUE;
4211         view->highlight_find_results = FALSE;
4212
4213         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4214         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4215
4216         gtk_drag_dest_set (GTK_WIDGET (view),
4217                            GTK_DEST_DEFAULT_ALL,
4218                            view_drop_targets,
4219                            G_N_ELEMENTS (view_drop_targets),
4220                            GDK_ACTION_COPY);
4221 }
4222
4223 /*** Callbacks ***/
4224
4225 static void
4226 find_changed_cb (EvDocument *document, int page, EvView *view)
4227 {
4228         double percent;
4229         int n_pages;
4230
4231         percent = ev_document_find_get_progress
4232                         (EV_DOCUMENT_FIND (view->document));
4233         n_pages = ev_page_cache_get_n_pages (view->page_cache);
4234
4235         if (view->jump_to_find_result == TRUE) {
4236                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
4237                 jump_to_find_result (view);
4238         }
4239         update_find_status_message (view, percent * n_pages >= n_pages - 1 );
4240         if (view->current_page == page)
4241                 gtk_widget_queue_draw (GTK_WIDGET (view));
4242 }
4243
4244 static void
4245 ev_view_change_page (EvView *view,
4246                      gint    new_page)
4247 {
4248         gint x, y;
4249
4250         view->current_page = new_page;
4251         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4252
4253         if (view->presentation)
4254                 ev_view_presentation_transition_start (view);
4255
4256         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4257         ev_view_handle_cursor_over_xy (view, x, y);
4258
4259         gtk_widget_queue_resize (GTK_WIDGET (view));
4260 }
4261
4262 static void
4263 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4264                                      EvView                *view)
4265 {
4266         g_object_unref (view->animation);
4267         view->animation = NULL;
4268         ev_view_change_page (view, view->current_page);
4269 }
4270
4271 static void
4272 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4273                                     gdouble                progress,
4274                                     EvView                *view)
4275 {
4276         gtk_widget_queue_draw (GTK_WIDGET (view));
4277 }
4278
4279 static void
4280 ev_view_presentation_animation_start (EvView *view,
4281                                       int     new_page)
4282 {
4283         EvTransitionEffect *effect = NULL;
4284         cairo_surface_t *surface;
4285
4286         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4287                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4288                                                             view->current_page);
4289         if (!effect)
4290                 return;
4291
4292         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4293         view->animation = ev_transition_animation_new (effect);
4294         ev_transition_animation_set_origin_surface (view->animation, surface);
4295
4296         g_signal_connect (view->animation, "frame",
4297                           G_CALLBACK (ev_view_transition_animation_frame), view);
4298         g_signal_connect (view->animation, "finished",
4299                           G_CALLBACK (ev_view_transition_animation_finish), view);
4300 }
4301
4302 static void
4303 job_finished_cb (EvPixbufCache *pixbuf_cache,
4304                  GdkRegion     *region,
4305                  EvView        *view)
4306 {
4307         if (view->animation) {
4308                 cairo_surface_t *surface;
4309
4310                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4311                 ev_transition_animation_set_dest_surface (view->animation, surface);
4312         }
4313
4314         if (region) {
4315                 gdk_window_invalidate_region (view->layout.bin_window,
4316                                               region, TRUE);
4317         } else {
4318                 gtk_widget_queue_draw (GTK_WIDGET (view));
4319         }
4320 }
4321
4322 static void
4323 page_changed_cb (EvPageCache *page_cache,
4324                  int          new_page,
4325                  EvView      *view)
4326 {
4327         if (view->current_page != new_page) {
4328                 if (view->presentation)
4329                         ev_view_presentation_animation_start (view, new_page);
4330
4331                 ev_view_change_page (view, new_page);
4332         } else {
4333                 gtk_widget_queue_draw (GTK_WIDGET (view));
4334         }
4335
4336         if (EV_IS_DOCUMENT_FIND (view->document)) {
4337                 view->find_result = 0;
4338                 update_find_status_message (view, TRUE);
4339         }
4340 }
4341
4342 static void
4343 on_adjustment_value_changed (GtkAdjustment *adjustment,
4344                              EvView        *view)
4345 {
4346         int dx = 0, dy = 0;
4347         gint x, y;
4348         GList *children, *l;
4349
4350         if (! GTK_WIDGET_REALIZED (view))
4351                 return;
4352
4353         if (view->hadjustment) {
4354                 dx = view->scroll_x - (int) view->hadjustment->value;
4355                 view->scroll_x = (int) view->hadjustment->value;
4356         } else {
4357                 view->scroll_x = 0;
4358         }
4359
4360         if (view->vadjustment) {
4361                 dy = view->scroll_y - (int) view->vadjustment->value;
4362                 view->scroll_y = (int) view->vadjustment->value;
4363         } else {
4364                 view->scroll_y = 0;
4365         }
4366
4367         children = gtk_container_get_children (GTK_CONTAINER (view));
4368         for (l = children; l && l->data; l = g_list_next (l)) {
4369                 gint       child_x, child_y;
4370                 GtkWidget *child = (GtkWidget *)l->data;
4371
4372                 gtk_container_child_get (GTK_CONTAINER (view),
4373                                          child,
4374                                          "x", &child_x,
4375                                          "y", &child_y,
4376                                          NULL);
4377                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4378         }
4379         g_list_free (children);
4380
4381         if (view->pending_resize)
4382                 gtk_widget_queue_draw (GTK_WIDGET (view));
4383         else
4384                 gdk_window_scroll (view->layout.bin_window, dx, dy);
4385
4386         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4387         ev_view_handle_cursor_over_xy (view, x, y);
4388
4389         if (view->document)
4390                 view_update_range_and_current_page (view);
4391 }
4392
4393 GtkWidget*
4394 ev_view_new (void)
4395 {
4396         GtkWidget *view;
4397
4398         view = g_object_new (EV_TYPE_VIEW, NULL);
4399
4400         return view;
4401 }
4402
4403 static void
4404 setup_caches (EvView *view)
4405 {
4406         view->page_cache = ev_page_cache_get (view->document);
4407         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
4408         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
4409         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4410         page_changed_cb (view->page_cache,
4411                          ev_page_cache_get_current_page (view->page_cache),
4412                          view);
4413 }
4414
4415 static void
4416 clear_caches (EvView *view)
4417 {
4418         if (view->pixbuf_cache) {
4419                 g_object_unref (view->pixbuf_cache);
4420                 view->pixbuf_cache = NULL;
4421         }
4422
4423         if (view->page_cache) {
4424                 view->page_cache = NULL;
4425         }
4426 }
4427
4428 void
4429 ev_view_set_loading (EvView       *view,
4430                      gboolean      loading)
4431 {
4432         view->loading = loading;
4433         gtk_widget_queue_draw (GTK_WIDGET (view));
4434 }
4435
4436 static gboolean
4437 ev_view_autoscroll_cb (EvView *view)
4438 {
4439         gdouble speed, value;
4440
4441         /* If the user stops autoscrolling, autoscrolling will be
4442          * set to false but the timeout will continue; stop the timeout: */
4443         if (!view->scroll_info.autoscrolling) {
4444                 view->scroll_info.timeout_id = 0;
4445                 return FALSE;
4446         }
4447
4448         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4449                 (view->scroll_info.last_y < view->scroll_info.start_y))
4450                 return TRUE;
4451
4452         /* Replace 100 with your speed of choice: The lower the faster.
4453          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4454          *      based on the distance of the starting point from the mouse
4455          * (All also effected by the timeout interval of this callback) */
4456
4457         if (view->scroll_info.start_y > view->scroll_info.last_y)
4458                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
4459         else
4460                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
4461
4462         value = gtk_adjustment_get_value (view->vadjustment);
4463         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
4464         gtk_adjustment_set_value (view->vadjustment, value);
4465
4466         return TRUE;
4467
4468 }
4469
4470 void
4471 ev_view_autoscroll_start (EvView *view)
4472 {
4473         gint x, y;
4474
4475         g_return_if_fail (EV_IS_VIEW (view));
4476
4477         if (view->scroll_info.autoscrolling)
4478                 return;
4479
4480         view->scroll_info.autoscrolling = TRUE;
4481         view->scroll_info.timeout_id =
4482                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
4483                                view);
4484
4485         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4486         ev_view_handle_cursor_over_xy (view, x, y);
4487 }
4488
4489 void
4490 ev_view_autoscroll_stop (EvView *view)
4491 {
4492         gint x, y;
4493
4494         g_return_if_fail (EV_IS_VIEW (view));
4495
4496         if (!view->scroll_info.autoscrolling)
4497                 return;
4498
4499         view->scroll_info.autoscrolling = FALSE;
4500         if (view->scroll_info.timeout_id) {
4501                 g_source_remove (view->scroll_info.timeout_id);
4502                 view->scroll_info.timeout_id = 0;
4503         }
4504
4505         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4506         ev_view_handle_cursor_over_xy (view, x, y);
4507 }
4508
4509 void
4510 ev_view_set_document (EvView     *view,
4511                       EvDocument *document)
4512 {
4513         g_return_if_fail (EV_IS_VIEW (view));
4514
4515         view->loading = FALSE;
4516
4517         if (document != view->document) {
4518                 clear_caches (view);
4519
4520                 if (view->document) {
4521                         g_signal_handlers_disconnect_by_func (view->document,
4522                                                               find_changed_cb,
4523                                                               view);
4524                         g_object_unref (view->document);
4525                         view->page_cache = NULL;
4526
4527                 }
4528
4529                 view->document = document;
4530                 view->find_result = 0;
4531
4532                 if (view->document) {
4533                         g_object_ref (view->document);
4534                         if (EV_IS_DOCUMENT_FIND (view->document)) {
4535                                 g_signal_connect (view->document,
4536                                                   "find_changed",
4537                                                   G_CALLBACK (find_changed_cb),
4538                                                   view);
4539                         }
4540
4541                         setup_caches (view);
4542                 }
4543
4544                 gtk_widget_queue_resize (GTK_WIDGET (view));
4545         }
4546 }
4547
4548 /*** Zoom and sizing mode ***/
4549
4550 #define EPSILON 0.0000001
4551 void
4552 ev_view_set_zoom (EvView   *view,
4553                   double    factor,
4554                   gboolean  relative)
4555 {
4556         double scale;
4557
4558         if (relative)
4559                 scale = view->scale * factor;
4560         else
4561                 scale = factor;
4562
4563         scale = CLAMP (scale,
4564                        view->sizing_mode == EV_SIZING_FREE ? view->min_scale : 0,
4565                        view->max_scale);
4566
4567         if (ABS (view->scale - scale) < EPSILON)
4568                 return;
4569
4570         if (view->loading_text) {
4571                 cairo_surface_destroy (view->loading_text);
4572                 view->loading_text = NULL;
4573         }
4574
4575         view->scale = scale;
4576         view->pending_resize = TRUE;
4577
4578         gtk_widget_queue_resize (GTK_WIDGET (view));
4579
4580         g_object_notify (G_OBJECT (view), "zoom");
4581 }
4582
4583 double
4584 ev_view_get_zoom (EvView *view)
4585 {
4586         return view->scale;
4587 }
4588
4589 void
4590 ev_view_set_screen_dpi (EvView  *view,
4591                         gdouble  dpi)
4592 {
4593         g_return_if_fail (EV_IS_VIEW (view));
4594         g_return_if_fail (dpi > 0);
4595
4596         view->dpi = dpi;
4597         view->min_scale = MIN_SCALE * dpi / 72.0;
4598         view->max_scale = MAX_SCALE * dpi / 72.0;
4599 }
4600
4601 gboolean
4602 ev_view_get_continuous (EvView *view)
4603 {
4604         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4605
4606         return view->continuous;
4607 }
4608
4609 void
4610 ev_view_set_continuous (EvView   *view,
4611                         gboolean  continuous)
4612 {
4613         g_return_if_fail (EV_IS_VIEW (view));
4614
4615         continuous = continuous != FALSE;
4616
4617         if (view->continuous != continuous) {
4618                 view->continuous = continuous;
4619                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4620                 gtk_widget_queue_resize (GTK_WIDGET (view));
4621         }
4622
4623         g_object_notify (G_OBJECT (view), "continuous");
4624 }
4625
4626 gboolean
4627 ev_view_get_dual_page (EvView *view)
4628 {
4629         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4630
4631         return view->dual_page;
4632 }
4633
4634 void
4635 ev_view_set_dual_page (EvView   *view,
4636                        gboolean  dual_page)
4637 {
4638         g_return_if_fail (EV_IS_VIEW (view));
4639
4640         dual_page = dual_page != FALSE;
4641
4642         if (view->dual_page == dual_page)
4643                 return;
4644
4645         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4646         view->dual_page = dual_page;
4647         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
4648          * preload_cache_size to be 2 if dual_page is set.
4649          */
4650         gtk_widget_queue_resize (GTK_WIDGET (view));
4651
4652         g_object_notify (G_OBJECT (view), "dual-page");
4653 }
4654
4655 void
4656 ev_view_set_fullscreen (EvView   *view,
4657                          gboolean  fullscreen)
4658 {
4659         g_return_if_fail (EV_IS_VIEW (view));
4660
4661         fullscreen = fullscreen != FALSE;
4662
4663         if (view->fullscreen == fullscreen)
4664                 return;
4665
4666         view->fullscreen = fullscreen;
4667         gtk_widget_queue_resize (GTK_WIDGET (view));
4668
4669         g_object_notify (G_OBJECT (view), "fullscreen");
4670 }
4671
4672 gboolean
4673 ev_view_get_fullscreen (EvView *view)
4674 {
4675         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4676
4677         return view->fullscreen;
4678 }
4679
4680 void
4681 ev_view_set_presentation (EvView   *view,
4682                           gboolean  presentation)
4683 {
4684         g_return_if_fail (EV_IS_VIEW (view));
4685
4686         presentation = presentation != FALSE;
4687
4688         if (view->presentation == presentation)
4689                 return;
4690
4691         if (!presentation)
4692                 view->presentation_state = EV_PRESENTATION_NORMAL;
4693
4694         view->presentation = presentation;
4695         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4696
4697         if (presentation) {
4698                 view->sizing_mode_saved = view->sizing_mode;
4699                 view->scale_saved = view->scale;
4700                 ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
4701         } else {
4702                 ev_view_set_sizing_mode (view, view->sizing_mode_saved);
4703                 ev_view_set_zoom (view, view->scale_saved, FALSE);
4704         }
4705
4706         gtk_widget_queue_resize (GTK_WIDGET (view));
4707
4708         if (presentation)
4709                 ev_view_presentation_transition_start (view);
4710         else {
4711                 ev_view_presentation_transition_stop (view);
4712
4713                 if (view->animation) {
4714                         /* stop any running animation */
4715                         ev_view_transition_animation_finish (view->animation, view);
4716                 }
4717         }
4718
4719         if (GTK_WIDGET_REALIZED (view)) {
4720                 if (view->presentation)
4721                         gdk_window_set_background (view->layout.bin_window,
4722                                                    &GTK_WIDGET (view)->style->black);
4723                 else
4724                         gdk_window_set_background (view->layout.bin_window,
4725                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
4726         }
4727
4728         g_object_notify (G_OBJECT (view), "presentation");
4729 }
4730
4731 gboolean
4732 ev_view_get_presentation (EvView *view)
4733 {
4734         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4735
4736         return view->presentation;
4737 }
4738
4739 static gboolean
4740 transition_next_page (EvView *view)
4741 {
4742         ev_view_next_page (view);
4743
4744         return FALSE;
4745 }
4746
4747 static void
4748 ev_view_presentation_transition_stop (EvView *view)
4749 {
4750         if (view->trans_timeout_id > 0)
4751                 g_source_remove (view->trans_timeout_id);
4752         view->trans_timeout_id = 0;
4753 }
4754
4755 static void
4756 ev_view_presentation_transition_start (EvView *view)
4757 {
4758         gdouble duration;
4759
4760         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
4761                 return;
4762
4763         ev_view_presentation_transition_stop (view);
4764
4765         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
4766                                                              view->current_page);
4767         if (duration > 0) {
4768                 view->trans_timeout_id =
4769                         g_timeout_add_seconds (duration,
4770                                                (GSourceFunc) transition_next_page,
4771                                                view);
4772         }
4773 }
4774
4775 void
4776 ev_view_set_sizing_mode (EvView       *view,
4777                          EvSizingMode  sizing_mode)
4778 {
4779         g_return_if_fail (EV_IS_VIEW (view));
4780
4781         if (view->sizing_mode == sizing_mode)
4782                 return;
4783
4784         view->sizing_mode = sizing_mode;
4785         gtk_widget_queue_resize (GTK_WIDGET (view));
4786
4787         g_object_notify (G_OBJECT (view), "sizing-mode");
4788 }
4789
4790 EvSizingMode
4791 ev_view_get_sizing_mode (EvView *view)
4792 {
4793         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
4794
4795         return view->sizing_mode;
4796 }
4797
4798 gboolean
4799 ev_view_can_zoom_in (EvView *view)
4800 {
4801         return view->scale * ZOOM_IN_FACTOR <= view->max_scale;
4802 }
4803
4804 gboolean
4805 ev_view_can_zoom_out (EvView *view)
4806 {
4807         return view->scale * ZOOM_OUT_FACTOR >= view->min_scale;
4808 }
4809
4810 void
4811 ev_view_zoom_in (EvView *view)
4812 {
4813         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
4814
4815         if (view->presentation)
4816                 return;
4817
4818         view->pending_scroll = SCROLL_TO_CENTER;
4819         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
4820 }
4821
4822 void
4823 ev_view_zoom_out (EvView *view)
4824 {
4825         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
4826
4827         if (view->presentation)
4828                 return;
4829
4830         view->pending_scroll = SCROLL_TO_CENTER;
4831         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
4832 }
4833
4834 void
4835 ev_view_rotate_right (EvView *view)
4836 {
4837         int rotation = view->rotation + 90;
4838
4839         if (rotation >= 360) {
4840                 rotation -= 360;
4841         }
4842
4843         ev_view_set_rotation (view, rotation);
4844 }
4845
4846 void
4847 ev_view_rotate_left (EvView *view)
4848 {
4849         int rotation = view->rotation - 90;
4850
4851         if (rotation < 0) {
4852                 rotation += 360;
4853         }
4854
4855         ev_view_set_rotation (view, rotation);
4856 }
4857
4858 void
4859 ev_view_set_rotation (EvView *view, int rotation)
4860 {
4861         view->rotation = rotation;
4862
4863         if (view->pixbuf_cache) {
4864                 ev_pixbuf_cache_clear (view->pixbuf_cache);
4865                 gtk_widget_queue_resize (GTK_WIDGET (view));
4866         }
4867
4868         if (rotation != 0)
4869                 clear_selection (view);
4870
4871         g_object_notify (G_OBJECT (view), "rotation");
4872 }
4873
4874 int
4875 ev_view_get_rotation (EvView *view)
4876 {
4877         return view->rotation;
4878 }
4879
4880 static double
4881 zoom_for_size_fit_width (int doc_width,
4882                          int doc_height,
4883                          int target_width,
4884                          int target_height,
4885                          int vsb_width)
4886 {
4887         double scale;
4888
4889         scale = (double)target_width / doc_width;
4890
4891         if (doc_height * scale > target_height)
4892                 scale = (double) (target_width - vsb_width) / doc_width;
4893
4894         return scale;
4895 }
4896
4897 static double
4898 zoom_for_size_fit_height (int doc_width,
4899                           int doc_height,
4900                           int target_width,
4901                           int target_height,
4902                           int vsb_height)
4903 {
4904         double scale;
4905
4906         scale = (double)target_height / doc_height;
4907
4908         if (doc_width * scale > target_width)
4909                 scale = (double) (target_height - vsb_height) / doc_height;
4910
4911         return scale;
4912 }
4913
4914 static double
4915 zoom_for_size_best_fit (int doc_width,
4916                         int doc_height,
4917                         int target_width,
4918                         int target_height,
4919                         int vsb_width,
4920                         int hsb_width)
4921 {
4922         double w_scale;
4923         double h_scale;
4924
4925         w_scale = (double)target_width / doc_width;
4926         h_scale = (double)target_height / doc_height;
4927
4928         if (doc_height * w_scale > target_height)
4929                 w_scale = (double) (target_width - vsb_width) / doc_width;
4930         if (doc_width * h_scale > target_width)
4931                 h_scale = (double) (target_height - hsb_width) / doc_height;
4932
4933         return MIN (w_scale, h_scale);
4934 }
4935
4936
4937 static void
4938 ev_view_zoom_for_size_presentation (EvView *view,
4939                                     int     width,
4940                                     int     height)
4941 {
4942         int doc_width, doc_height;
4943         gdouble scale;
4944
4945         ev_page_cache_get_size (view->page_cache,
4946                                 view->current_page,
4947                                 view->rotation,
4948                                 1.0,
4949                                 &doc_width,
4950                                 &doc_height);
4951         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
4952         ev_view_set_zoom (view, scale, FALSE);
4953 }
4954
4955 static void
4956 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
4957                            int     width,
4958                            int     height,
4959                            int     vsb_width,
4960                            int     hsb_height)
4961 {
4962         int doc_width, doc_height;
4963         GtkBorder border;
4964         gdouble scale;
4965
4966         ev_page_cache_get_max_width (view->page_cache,
4967                                      view->rotation,
4968                                      1.0,
4969                                      &doc_width);
4970         ev_page_cache_get_max_height (view->page_cache,
4971                                       view->rotation,
4972                                       1.0,
4973                                       &doc_height);
4974         compute_border (view, doc_width, doc_height, &border);
4975
4976         doc_width = doc_width * 2;
4977         width -= (2 * (border.left + border.right) + 3 * view->spacing);
4978         height -= (border.top + border.bottom + 2 * view->spacing - 1);
4979
4980         /* FIXME: We really need to calculate the overall height here, not the
4981          * page height.  We assume there's always a vertical scrollbar for
4982          * now.  We need to fix this. */
4983         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4984                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
4985         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4986                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
4987         else
4988                 g_assert_not_reached ();
4989
4990         ev_view_set_zoom (view, scale, FALSE);
4991 }
4992
4993 static void
4994 ev_view_zoom_for_size_continuous (EvView *view,
4995                                   int     width,
4996                                   int     height,
4997                                   int     vsb_width,
4998                                   int     hsb_height)
4999 {
5000         int doc_width, doc_height;
5001         GtkBorder border;
5002         gdouble scale;
5003
5004         ev_page_cache_get_max_width (view->page_cache,
5005                                      view->rotation,
5006                                      1.0,
5007                                      &doc_width);
5008         ev_page_cache_get_max_height (view->page_cache,
5009                                       view->rotation,
5010                                       1.0,
5011                                       &doc_height);
5012         compute_border (view, doc_width, doc_height, &border);
5013
5014         width -= (border.left + border.right + 2 * view->spacing);
5015         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5016
5017         /* FIXME: We really need to calculate the overall height here, not the
5018          * page height.  We assume there's always a vertical scrollbar for
5019          * now.  We need to fix this. */
5020         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5021                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
5022         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5023                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
5024         else
5025                 g_assert_not_reached ();
5026
5027         ev_view_set_zoom (view, scale, FALSE);
5028 }
5029
5030 static void
5031 ev_view_zoom_for_size_dual_page (EvView *view,
5032                                  int     width,
5033                                  int     height,
5034                                  int     vsb_width,
5035                                  int     hsb_height)
5036 {
5037         GtkBorder border;
5038         gint doc_width, doc_height;
5039         gdouble scale;
5040         gint other_page;
5041
5042         other_page = view->current_page ^ 1;
5043
5044         /* Find the largest of the two. */
5045         ev_page_cache_get_size (view->page_cache,
5046                                 view->current_page,
5047                                 view->rotation,
5048                                 1.0,
5049                                 &doc_width, &doc_height);
5050
5051         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
5052                 gint width_2, height_2;
5053                 ev_page_cache_get_size (view->page_cache,
5054                                         other_page,
5055                                         view->rotation,
5056                                         1.0,
5057                                         &width_2, &height_2);
5058                 if (width_2 > doc_width)
5059                         doc_width = width_2;
5060                 if (height_2 > doc_height)
5061                         doc_height = height_2;
5062         }
5063         compute_border (view, doc_width, doc_height, &border);
5064
5065         doc_width = doc_width * 2;
5066         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5067         height -= (border.top + border.bottom + 2 * view->spacing);
5068
5069         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5070                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
5071         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5072                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
5073         else
5074                 g_assert_not_reached ();
5075
5076         ev_view_set_zoom (view, scale, FALSE);
5077 }
5078
5079 static void
5080 ev_view_zoom_for_size_single_page (EvView *view,
5081                                    int     width,
5082                                    int     height,
5083                                    int     vsb_width,
5084                                    int     hsb_height)
5085 {
5086         int doc_width, doc_height;
5087         GtkBorder border;
5088         gdouble scale;
5089
5090         ev_page_cache_get_size (view->page_cache,
5091                                 view->current_page,
5092                                 view->rotation,
5093                                 1.0,
5094                                 &doc_width,
5095                                 &doc_height);
5096         /* Get an approximate border */
5097         compute_border (view, width, height, &border);
5098
5099         width -= (border.left + border.right + 2 * view->spacing);
5100         height -= (border.top + border.bottom + 2 * view->spacing);
5101
5102         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5103                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
5104         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5105                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
5106         else
5107                 g_assert_not_reached ();
5108
5109         ev_view_set_zoom (view, scale, FALSE);
5110 }
5111
5112 static void
5113 ev_view_set_zoom_for_size (EvView *view,
5114                            int     width,
5115                            int     height,
5116                            int     vsb_width,
5117                            int     hsb_height)
5118 {
5119         g_return_if_fail (EV_IS_VIEW (view));
5120         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5121                           view->sizing_mode == EV_SIZING_BEST_FIT);
5122         g_return_if_fail (width >= 0);
5123         g_return_if_fail (height >= 0);
5124
5125         if (view->document == NULL)
5126                 return;
5127
5128         if (view->presentation)
5129                 ev_view_zoom_for_size_presentation (view, width, height);
5130         else if (view->continuous && view->dual_page)
5131                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
5132         else if (view->continuous)
5133                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
5134         else if (view->dual_page)
5135                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
5136         else
5137                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
5138 }
5139
5140 /*** Find ***/
5141 static void
5142 update_find_status_message (EvView *view, gboolean this_page)
5143 {
5144         char *message;
5145
5146         if (this_page) {
5147                 int results;
5148
5149                 results = ev_document_find_get_n_results
5150                                 (EV_DOCUMENT_FIND (view->document),
5151                                  view->current_page);
5152                 /* TRANS: Sometimes this could be better translated as
5153                    "%d hit(s) on this page".  Therefore this string
5154                    contains plural cases. */
5155                 message = g_strdup_printf (ngettext ("%d found on this page",
5156                                                      "%d found on this page",
5157                                                      results),
5158                                            results);
5159         } else {
5160                 double percent;
5161
5162                 percent = ev_document_find_get_progress
5163                                 (EV_DOCUMENT_FIND (view->document));
5164                 message = g_strdup_printf (_("%3d%% remaining to search"),
5165                                            (int) ((1.0 - percent) * 100));
5166
5167         }
5168         ev_view_set_find_status (view, message);
5169         g_free (message);
5170 }
5171
5172 const char *
5173 ev_view_get_find_status (EvView *view)
5174 {
5175         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
5176
5177         return view->find_status;
5178 }
5179
5180 static void
5181 ev_view_set_find_status (EvView *view, const char *message)
5182 {
5183         g_return_if_fail (EV_IS_VIEW (view));
5184
5185         g_free (view->find_status);
5186         view->find_status = g_strdup (message);
5187         g_object_notify (G_OBJECT (view), "find-status");
5188 }
5189
5190 static void
5191 jump_to_find_result (EvView *view)
5192 {
5193         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
5194         EvRectangle rect;
5195         GdkRectangle view_rect;
5196         int n_results;
5197         int page = view->current_page;
5198
5199         n_results = ev_document_find_get_n_results (find, page);
5200
5201         if (n_results > 0  && view->find_result < n_results) {
5202                 ev_document_find_get_result
5203                         (find, page, view->find_result, &rect);
5204
5205                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
5206                 ensure_rectangle_is_visible (view, &view_rect);
5207         }
5208 }
5209
5210 /**
5211  * jump_to_find_page
5212  * @view: #EvView instance
5213  * @direction: Direction to look
5214  * @shift: Shift from current page
5215  *
5216  * Jumps to the first page that has occurences of searched word.
5217  * Uses a direction where to look and a shift from current page.
5218  *
5219  */
5220 static void
5221 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5222 {
5223         int n_pages, i;
5224
5225         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5226
5227         for (i = 0; i < n_pages; i++) {
5228                 int has_results;
5229                 int page;
5230
5231                 if (direction == EV_VIEW_FIND_NEXT)
5232                         page = view->current_page + i;
5233                 else
5234                         page = view->current_page - i;
5235                 page += shift;
5236
5237                 if (page >= n_pages) {
5238                         page = page - n_pages;
5239                 }
5240                 if (page < 0)
5241                         page = page + n_pages;
5242
5243                 has_results = ev_document_find_page_has_results
5244                                 (EV_DOCUMENT_FIND (view->document), page);
5245                 if (has_results == -1) {
5246                         break;
5247                 } else if (has_results == 1) {
5248                         ev_page_cache_set_current_page (view->page_cache, page);
5249                         break;
5250                 }
5251         }
5252 }
5253
5254 gboolean
5255 ev_view_can_find_next (EvView *view)
5256 {
5257         if (EV_IS_DOCUMENT_FIND (view->document)) {
5258                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
5259                 int i, n_pages;
5260
5261                 n_pages = ev_page_cache_get_n_pages (view->page_cache);
5262                 for (i = 0; i < n_pages; i++) {
5263                         if (ev_document_find_get_n_results (find, i) > 0) {
5264                                 return TRUE;
5265                         }
5266                 }
5267         }
5268
5269         return FALSE;
5270 }
5271
5272 void
5273 ev_view_find_next (EvView *view)
5274 {
5275         int n_results, n_pages;
5276         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
5277
5278         n_results = ev_document_find_get_n_results (find, view->current_page);
5279
5280         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5281
5282         view->find_result++;
5283
5284         if (view->find_result >= n_results) {
5285
5286                 view->find_result = 0;
5287                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5288                 jump_to_find_result (view);
5289         } else {
5290                 jump_to_find_result (view);
5291                 gtk_widget_queue_draw (GTK_WIDGET (view));
5292         }
5293 }
5294
5295 gboolean
5296 ev_view_can_find_previous (EvView *view)
5297 {
5298         if (EV_IS_DOCUMENT_FIND (view->document)) {
5299                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
5300                 int i, n_pages;
5301
5302                 n_pages = ev_page_cache_get_n_pages (view->page_cache);
5303                 for (i = n_pages - 1; i >= 0; i--) {
5304                         if (ev_document_find_get_n_results (find, i) > 0) {
5305                                 return TRUE;
5306                         }
5307                 }
5308         }
5309
5310         return FALSE;
5311 }
5312 void
5313 ev_view_find_previous (EvView *view)
5314 {
5315         int n_results, n_pages;
5316         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
5317         EvPageCache *page_cache;
5318
5319         page_cache = ev_page_cache_get (view->document);
5320
5321         n_results = ev_document_find_get_n_results (find, view->current_page);
5322
5323         n_pages = ev_page_cache_get_n_pages (page_cache);
5324
5325         view->find_result--;
5326
5327         if (view->find_result < 0) {
5328
5329                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5330                 view->find_result = ev_document_find_get_n_results (find, view->current_page) - 1;
5331                 jump_to_find_result (view);
5332         } else {
5333                 jump_to_find_result (view);
5334                 gtk_widget_queue_draw (GTK_WIDGET (view));
5335         }
5336 }
5337
5338 void
5339 ev_view_search_changed (EvView *view)
5340 {
5341         /* search string has changed, focus on new search result */
5342         view->jump_to_find_result = TRUE;
5343 }
5344
5345 void
5346 ev_view_set_highlight_search (EvView *view, gboolean value)
5347 {
5348         view->highlight_find_results = value;
5349         gtk_widget_queue_draw (GTK_WIDGET (view));
5350 }
5351
5352 void
5353 ev_view_find_cancel (EvView *view)
5354 {
5355         if (EV_IS_DOCUMENT_FIND (view->document)) {
5356                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
5357
5358                 ev_document_find_cancel (find);
5359         }
5360 }
5361
5362 /*** Selections ***/
5363
5364 /* compute_new_selection_rect/text calculates the area currently selected by
5365  * view_rect.  each handles a different mode;
5366  */
5367 static GList *
5368 compute_new_selection_rect (EvView       *view,
5369                             GdkPoint     *start,
5370                             GdkPoint     *stop)
5371 {
5372         GdkRectangle view_rect;
5373         int n_pages, i;
5374         GList *list = NULL;
5375
5376         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5377
5378         view_rect.x = MIN (start->x, stop->x);
5379         view_rect.y = MIN (start->y, stop->y);
5380         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5381         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5382
5383         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5384
5385         for (i = 0; i < n_pages; i++) {
5386                 GdkRectangle page_area;
5387                 GtkBorder border;
5388
5389                 if (get_page_extents (view, i, &page_area, &border)) {
5390                         GdkRectangle overlap;
5391
5392                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5393                                 EvViewSelection *selection;
5394
5395                                 selection = g_new0 (EvViewSelection, 1);
5396                                 selection->page = i;
5397                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5398                                                        &(selection->rect));
5399
5400                                 list = g_list_append (list, selection);
5401                         }
5402                 }
5403         }
5404
5405         return list;
5406 }
5407
5408 static gboolean
5409 gdk_rectangle_point_in (GdkRectangle *rectangle,
5410                         GdkPoint     *point)
5411 {
5412         return rectangle->x <= point->x &&
5413                 rectangle->y <= point->y &&
5414                 point->x < rectangle->x + rectangle->width &&
5415                 point->y < rectangle->y + rectangle->height;
5416 }
5417
5418 static GList *
5419 compute_new_selection_text (EvView          *view,
5420                             EvSelectionStyle style,
5421                             GdkPoint        *start,
5422                             GdkPoint        *stop)
5423 {
5424         int n_pages, i, first, last;
5425         GList *list = NULL;
5426         EvViewSelection *selection;
5427         gint width, height;
5428         int start_page, end_page;
5429
5430         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5431
5432         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5433
5434         /* First figure out the range of pages the selection
5435          * affects. */
5436         first = n_pages;
5437         last = 0;
5438         if (view->continuous) {
5439                 start_page = 0;
5440                 end_page = n_pages;
5441         } else if (view->dual_page) {
5442                 start_page = view->start_page;
5443                 end_page = view->end_page + 1;
5444         } else {
5445                 start_page = view->current_page;
5446                 end_page = view->current_page + 1;
5447         }
5448
5449         for (i = start_page; i < end_page; i++) {
5450                 GdkRectangle page_area;
5451                 GtkBorder border;
5452
5453                 get_page_extents (view, i, &page_area, &border);
5454                 if (gdk_rectangle_point_in (&page_area, start) ||
5455                     gdk_rectangle_point_in (&page_area, stop)) {
5456                         if (first == n_pages)
5457                                 first = i;
5458                         last = i;
5459                 }
5460
5461         }
5462
5463         /* Now create a list of EvViewSelection's for the affected
5464          * pages.  This could be an empty list, a list of just one
5465          * page or a number of pages.*/
5466         for (i = first; i < last + 1; i++) {
5467                 GdkRectangle page_area;
5468                 GtkBorder border;
5469                 GdkPoint *point;
5470
5471                 ev_page_cache_get_size (view->page_cache, i,
5472                                         view->rotation,
5473                                         1.0, &width, &height);
5474
5475                 selection = g_new0 (EvViewSelection, 1);
5476                 selection->page = i;
5477                 selection->style = style;
5478                 selection->rect.x1 = selection->rect.y1 = 0;
5479                 selection->rect.x2 = width;
5480                 selection->rect.y2 = height;
5481
5482                 get_page_extents (view, i, &page_area, &border);
5483
5484                 if (gdk_rectangle_point_in (&page_area, start))
5485                         point = start;
5486                 else
5487                         point = stop;
5488
5489                 if (i == first)
5490                         view_point_to_doc_point (view, point, &page_area,
5491                                                  &selection->rect.x1,
5492                                                  &selection->rect.y1);
5493
5494                 /* If the selection is contained within just one page,
5495                  * make sure we don't write 'start' into both points
5496                  * in selection->rect. */
5497                 if (first == last)
5498                         point = stop;
5499
5500                 if (i == last)
5501                         view_point_to_doc_point (view, point, &page_area,
5502                                                  &selection->rect.x2,
5503                                                  &selection->rect.y2);
5504
5505                 list = g_list_append (list, selection);
5506         }
5507
5508         return list;
5509 }
5510
5511 /* This function takes the newly calculated list, and figures out which regions
5512  * have changed.  It then queues a redraw approporiately.
5513  */
5514 static void
5515 merge_selection_region (EvView *view,
5516                         GList  *new_list)
5517 {
5518         GList *old_list;
5519         GList *new_list_ptr, *old_list_ptr;
5520
5521         /* Update the selection */
5522         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5523         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5524         view->selection_info.selections = new_list;
5525         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5526         g_object_notify (G_OBJECT (view), "has-selection");
5527
5528         new_list_ptr = new_list;
5529         old_list_ptr = old_list;
5530
5531         while (new_list_ptr || old_list_ptr) {
5532                 EvViewSelection *old_sel, *new_sel;
5533                 int cur_page;
5534                 GdkRegion *region = NULL;
5535
5536                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5537                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5538
5539                 /* Assume that the lists are in order, and we run through them
5540                  * comparing them, one page at a time.  We come out with the
5541                  * first page we see. */
5542                 if (new_sel && old_sel) {
5543                         if (new_sel->page < old_sel->page) {
5544                                 new_list_ptr = new_list_ptr->next;
5545                                 old_sel = NULL;
5546                         } else if (new_sel->page > old_sel->page) {
5547                                 old_list_ptr = old_list_ptr->next;
5548                                 new_sel = NULL;
5549                         } else {
5550                                 new_list_ptr = new_list_ptr->next;
5551                                 old_list_ptr = old_list_ptr->next;
5552                         }
5553                 } else if (new_sel) {
5554                         new_list_ptr = new_list_ptr->next;
5555                 } else if (old_sel) {
5556                         old_list_ptr = old_list_ptr->next;
5557                 }
5558
5559                 g_assert (new_sel || old_sel);
5560
5561                 /* is the page we're looking at on the screen?*/
5562                 cur_page = new_sel ? new_sel->page : old_sel->page;
5563                 if (cur_page < view->start_page || cur_page > view->end_page)
5564                         continue;
5565
5566                 /* seed the cache with a new page.  We are going to need the new
5567                  * region too. */
5568                 if (new_sel) {
5569                         GdkRegion *tmp_region = NULL;
5570
5571                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5572                                                                cur_page,
5573                                                                view->scale,
5574                                                                &tmp_region);
5575
5576                         if (tmp_region) {
5577                                 new_sel->covered_region = gdk_region_copy (tmp_region);
5578                         }
5579                 }
5580
5581                 /* Now we figure out what needs redrawing */
5582                 if (old_sel && new_sel) {
5583                         if (old_sel->covered_region && new_sel->covered_region) {
5584                                 /* We only want to redraw the areas that have
5585                                  * changed, so we xor the old and new regions
5586                                  * and redraw if it's different */
5587                                 region = gdk_region_copy (old_sel->covered_region);
5588                                 gdk_region_xor (region, new_sel->covered_region);
5589                                 if (gdk_region_empty (region)) {
5590                                         gdk_region_destroy (region);
5591                                         region = NULL;
5592                                 }
5593                         } else if (old_sel->covered_region) {
5594                                 region = gdk_region_copy (old_sel->covered_region);
5595                         } else if (new_sel->covered_region) {
5596                                 region = gdk_region_copy (new_sel->covered_region);
5597                         }
5598                 } else if (old_sel && !new_sel) {
5599                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
5600                                 region = gdk_region_copy (old_sel->covered_region);
5601                         }
5602                 } else if (!old_sel && new_sel) {
5603                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
5604                                 region = gdk_region_copy (new_sel->covered_region);
5605                         }
5606                 } else {
5607                         g_assert_not_reached ();
5608                 }
5609
5610                 /* Redraw the damaged region! */
5611                 if (region) {
5612                         GdkRectangle page_area;
5613                         GtkBorder border;
5614
5615                         /* I don't know why but the region is smaller
5616                          * than expected. This hack fixes it, I guess
5617                          * 10 pixels more won't hurt
5618                          */
5619                         gdk_region_shrink (region, -5, -5);
5620
5621                         get_page_extents (view, cur_page, &page_area, &border);
5622                         gdk_region_offset (region,
5623                                            page_area.x + border.left - view->scroll_x,
5624                                            page_area.y + border.top - view->scroll_y);
5625                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
5626                         gdk_region_destroy (region);
5627                 }
5628         }
5629
5630         /* Free the old list, now that we're done with it. */
5631         g_list_foreach (old_list, (GFunc) selection_free, NULL);
5632 }
5633
5634 static void
5635 compute_selections (EvView          *view,
5636                     EvSelectionStyle style,
5637                     GdkPoint        *start,
5638                     GdkPoint        *stop)
5639 {
5640         GList *list;
5641
5642         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
5643                 list = compute_new_selection_rect (view, start, stop);
5644         else
5645                 list = compute_new_selection_text (view, style, start, stop);
5646         merge_selection_region (view, list);
5647 }
5648
5649 /* Free's the selection.  It's up to the caller to queue redraws if needed.
5650  */
5651 static void
5652 selection_free (EvViewSelection *selection)
5653 {
5654         if (selection->covered_region)
5655                 gdk_region_destroy (selection->covered_region);
5656         g_free (selection);
5657 }
5658
5659 static void
5660 clear_selection (EvView *view)
5661 {
5662         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5663         view->selection_info.selections = NULL;
5664         view->selection_info.in_selection = FALSE;
5665         if (view->pixbuf_cache)
5666                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
5667         g_object_notify (G_OBJECT (view), "has-selection");
5668 }
5669
5670 void
5671 ev_view_select_all (EvView *view)
5672 {
5673         GList *selections = NULL;
5674         int n_pages, i;
5675
5676         /* Disable selection on rotated pages for the 0.4.0 series */
5677         if (view->rotation != 0)
5678                 return;
5679
5680         clear_selection (view);
5681
5682         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5683         for (i = 0; i < n_pages; i++) {
5684                 int width, height;
5685                 EvViewSelection *selection;
5686
5687                 ev_page_cache_get_size (view->page_cache,
5688                                         i,
5689                                         view->rotation,
5690                                         1.0, &width, &height);
5691
5692                 selection = g_new0 (EvViewSelection, 1);
5693                 selection->page = i;
5694                 selection->style = EV_SELECTION_STYLE_GLYPH;
5695                 selection->rect.x1 = selection->rect.y1 = 0;
5696                 selection->rect.x2 = width;
5697                 selection->rect.y2 = height;
5698
5699                 selections = g_list_append (selections, selection);
5700         }
5701
5702         merge_selection_region (view, selections);
5703         gtk_widget_queue_draw (GTK_WIDGET (view));
5704 }
5705
5706 gboolean
5707 ev_view_get_has_selection (EvView *view)
5708 {
5709         return view->selection_info.selections != NULL;
5710 }
5711
5712 static char *
5713 get_selected_text (EvView *view)
5714 {
5715         GString *text;
5716         GList *l;
5717         gchar *normalized_text;
5718         EvRenderContext *rc;
5719
5720         text = g_string_new (NULL);
5721         rc = ev_render_context_new (NULL, view->rotation, view->scale);
5722
5723         ev_document_doc_mutex_lock ();
5724
5725         for (l = view->selection_info.selections; l != NULL; l = l->next) {
5726                 EvViewSelection *selection = (EvViewSelection *)l->data;
5727                 EvPage *page;
5728                 gchar *tmp;
5729
5730                 page = ev_document_get_page (view->document, selection->page);
5731                 ev_render_context_set_page (rc, page);
5732                 g_object_unref (page);
5733
5734                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
5735                                                       rc, selection->style,
5736                                                       &(selection->rect));
5737
5738                 g_string_append (text, tmp);
5739                 g_free (tmp);
5740         }
5741
5742         g_object_unref (rc);
5743
5744         ev_document_doc_mutex_unlock ();
5745
5746         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
5747         g_string_free (text, TRUE);
5748         return normalized_text;
5749 }
5750
5751 static void
5752 ev_view_clipboard_copy (EvView      *view,
5753                         const gchar *text)
5754 {
5755         GtkClipboard *clipboard;
5756
5757         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
5758                                               GDK_SELECTION_CLIPBOARD);
5759         gtk_clipboard_set_text (clipboard, text, -1);
5760 }
5761
5762 void
5763 ev_view_copy (EvView *ev_view)
5764 {
5765         char *text;
5766
5767         if (!EV_IS_SELECTION (ev_view->document))
5768                 return;
5769
5770         text = get_selected_text (ev_view);
5771         ev_view_clipboard_copy (ev_view, text);
5772         g_free (text);
5773 }
5774
5775 static void
5776 ev_view_primary_get_cb (GtkClipboard     *clipboard,
5777                         GtkSelectionData *selection_data,
5778                         guint             info,
5779                         gpointer          data)
5780 {
5781         EvView *ev_view = EV_VIEW (data);
5782
5783         if (ev_view->link_selected) {
5784                 gtk_selection_data_set_text (selection_data,
5785                                              ev_link_action_get_uri (ev_view->link_selected),
5786                                              -1);
5787         } else if (EV_IS_SELECTION (ev_view->document) &&
5788                    ev_view->selection_info.selections) {
5789                 gchar *text;
5790
5791                 text = get_selected_text (ev_view);
5792                 if (text) {
5793                         gtk_selection_data_set_text (selection_data, text, -1);
5794                         g_free (text);
5795                 }
5796         }
5797 }
5798
5799 static void
5800 ev_view_primary_clear_cb (GtkClipboard *clipboard,
5801                           gpointer      data)
5802 {
5803         EvView *view = EV_VIEW (data);
5804
5805         clear_selection (view);
5806         clear_link_selected (view);
5807 }
5808
5809 static void
5810 ev_view_update_primary_selection (EvView *ev_view)
5811 {
5812         GtkClipboard *clipboard;
5813
5814         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
5815                                               GDK_SELECTION_PRIMARY);
5816
5817         if (ev_view->selection_info.selections || ev_view->link_selected) {
5818                 if (!gtk_clipboard_set_with_owner (clipboard,
5819                                                    clipboard_targets,
5820                                                    G_N_ELEMENTS (clipboard_targets),
5821                                                    ev_view_primary_get_cb,
5822                                                    ev_view_primary_clear_cb,
5823                                                    G_OBJECT (ev_view)))
5824                         ev_view_primary_clear_cb (clipboard, ev_view);
5825         } else {
5826                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
5827                         gtk_clipboard_clear (clipboard);
5828         }
5829 }
5830
5831 static void
5832 clear_link_selected (EvView *view)
5833 {
5834         if (view->link_selected) {
5835                 g_object_unref (view->link_selected);
5836                 view->link_selected = NULL;
5837         }
5838 }
5839
5840 void
5841 ev_view_copy_link_address (EvView       *view,
5842                            EvLinkAction *action)
5843 {
5844         clear_link_selected (view);
5845
5846         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
5847
5848         view->link_selected = g_object_ref (action);
5849         ev_view_update_primary_selection (view);
5850 }
5851
5852 /*** Cursor operations ***/
5853
5854 static GdkCursor *
5855 ev_view_create_invisible_cursor(void)
5856 {
5857        GdkBitmap *empty;
5858        GdkColor black = { 0, 0, 0, 0 };
5859        static char bits[] = { 0x00 };
5860
5861        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
5862
5863        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
5864 }
5865
5866 static void
5867 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
5868 {
5869         GdkCursor *cursor = NULL;
5870         GdkDisplay *display;
5871         GtkWidget *widget;
5872
5873         if (view->cursor == new_cursor) {
5874                 return;
5875         }
5876
5877         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
5878         display = gtk_widget_get_display (widget);
5879         view->cursor = new_cursor;
5880
5881         switch (new_cursor) {
5882                 case EV_VIEW_CURSOR_NORMAL:
5883                         gdk_window_set_cursor (view->layout.bin_window, NULL);
5884                         break;
5885                 case EV_VIEW_CURSOR_IBEAM:
5886                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
5887                         break;
5888                 case EV_VIEW_CURSOR_LINK:
5889                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
5890                         break;
5891                 case EV_VIEW_CURSOR_WAIT:
5892                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
5893                         break;
5894                 case EV_VIEW_CURSOR_HIDDEN:
5895                         cursor = ev_view_create_invisible_cursor ();
5896                         break;
5897                 case EV_VIEW_CURSOR_DRAG:
5898                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
5899                         break;
5900                 case EV_VIEW_CURSOR_AUTOSCROLL:
5901                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
5902                         break;
5903         }
5904
5905         if (cursor) {
5906                 gdk_window_set_cursor (view->layout.bin_window, cursor);
5907                 gdk_cursor_unref (cursor);
5908                 gdk_flush();
5909         }
5910 }
5911
5912 void
5913 ev_view_hide_cursor (EvView *view)
5914 {
5915        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
5916 }
5917
5918 void
5919 ev_view_show_cursor (EvView *view)
5920 {
5921        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
5922 }
5923
5924 static void
5925 ev_view_reset_presentation_state (EvView *view)
5926 {
5927         if (!view->presentation ||
5928             view->presentation_state == EV_PRESENTATION_NORMAL)
5929                 return;
5930
5931         view->presentation_state = EV_PRESENTATION_NORMAL;
5932         gdk_window_set_background (view->layout.bin_window,
5933                                    &GTK_WIDGET (view)->style->black);
5934         gtk_widget_queue_draw (GTK_WIDGET (view));
5935 }
5936
5937 gboolean
5938 ev_view_next_page (EvView *view)
5939 {
5940         int page, n_pages;
5941
5942         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5943
5944         if (!view->page_cache)
5945                 return FALSE;
5946
5947         if (view->presentation &&
5948             (view->presentation_state == EV_PRESENTATION_BLACK ||
5949              view->presentation_state == EV_PRESENTATION_WHITE)) {
5950                 ev_view_reset_presentation_state (view);
5951                 return FALSE;
5952         }
5953
5954         if (view->animation) {
5955                 ev_view_transition_animation_finish (view->animation, view);
5956                 return TRUE;
5957         }
5958
5959         ev_view_presentation_transition_stop (view);
5960         ev_view_reset_presentation_state (view);
5961
5962         page = ev_page_cache_get_current_page (view->page_cache);
5963         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5964
5965         if (view->dual_page && !view->presentation)
5966                 page = page + 2;
5967         else
5968                 page = page + 1;
5969
5970         if (page < n_pages) {
5971                 ev_page_cache_set_current_page (view->page_cache, page);
5972                 return TRUE;
5973         } else if (view->presentation && page == n_pages) {
5974                 view->presentation_state = EV_PRESENTATION_END;
5975                 gtk_widget_queue_draw (GTK_WIDGET (view));
5976                 return TRUE;
5977         } else if (view->dual_page && page == n_pages) {
5978                 ev_page_cache_set_current_page (view->page_cache, page - 1);
5979                 return TRUE;
5980         } else {
5981                 return FALSE;
5982         }
5983 }
5984
5985 gboolean
5986 ev_view_previous_page (EvView *view)
5987 {
5988         int page;
5989
5990         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5991
5992         if (!view->page_cache)
5993                 return FALSE;
5994
5995         if (view->presentation &&
5996             view->presentation_state == EV_PRESENTATION_END) {
5997                 ev_view_reset_presentation_state (view);
5998                 return TRUE;
5999         }
6000
6001         if (view->presentation &&
6002             (view->presentation_state == EV_PRESENTATION_BLACK ||
6003              view->presentation_state == EV_PRESENTATION_WHITE)) {
6004                 ev_view_reset_presentation_state (view);
6005                 return FALSE;
6006         }
6007
6008         if (view->animation) {
6009                 ev_view_transition_animation_finish (view->animation, view);
6010                 return TRUE;
6011         }
6012
6013         ev_view_reset_presentation_state (view);
6014
6015         page = ev_page_cache_get_current_page (view->page_cache);
6016
6017         if (view->dual_page && !view->presentation)
6018                 page = page - 2;
6019         else
6020                 page = page - 1;
6021
6022         if (page >= 0) {
6023                 ev_page_cache_set_current_page (view->page_cache, page);
6024                 return TRUE;
6025         } else if (ev_view_get_dual_page (view) && page == -1) {
6026                 ev_page_cache_set_current_page (view->page_cache, 0);
6027                 return TRUE;
6028         } else {
6029                 return FALSE;
6030         }
6031 }
6032
6033 /*** Enum description for usage in signal ***/
6034
6035 GType
6036 ev_sizing_mode_get_type (void)
6037 {
6038   static GType etype = 0;
6039   if (etype == 0) {
6040     static const GEnumValue values[] = {
6041       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
6042       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
6043       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
6044       { 0, NULL, NULL }
6045     };
6046     etype = g_enum_register_static ("EvSizingMode", values);
6047   }
6048   return etype;
6049 }
6050
6051 GType
6052 ev_scroll_type_get_type (void)
6053 {
6054   static GType etype = 0;
6055   if (etype == 0) {
6056     static const GEnumValue values[] = {
6057       { EV_SCROLL_PAGE_FORWARD, "EV_SCROLL_PAGE_FORWARD", "scroll-page-forward" },
6058       { EV_SCROLL_PAGE_BACKWARD, "EV_SCROLL_PAGE_BACKWARD", "scroll-page-backward" },
6059       { EV_SCROLL_STEP_FORWARD, "EV_SCROLL_STEP_FORWARD", "scroll-step-forward" },
6060       { EV_SCROLL_STEP_FORWARD, "EV_SCROLL_STEP_FORWARD", "scroll-step-forward" },
6061       { EV_SCROLL_STEP_UP, "EV_SCROLL_STEP_UP", "scroll-step-up" },
6062       { EV_SCROLL_STEP_DOWN, "EV_SCROLL_STEP_DOWN", "scroll-step-down" },
6063       { 0, NULL, NULL }
6064     };
6065     etype = g_enum_register_static ("EvScrollType", values);
6066   }
6067   return etype;
6068 }
6069
6070 void
6071 ev_view_update_view_size (EvView *view, GtkScrolledWindow * scrolled_window)
6072 {
6073         int width, height;
6074         GtkRequisition vsb_requisition;
6075         GtkRequisition hsb_requisition;
6076         int scrollbar_spacing;
6077
6078         /* Calculate the width available for the content */
6079         width  = GTK_WIDGET (scrolled_window)->allocation.width;
6080         height = GTK_WIDGET (scrolled_window)->allocation.height;
6081
6082         if (gtk_scrolled_window_get_shadow_type (scrolled_window) == GTK_SHADOW_IN
6083             && view) {
6084                 width -=  2 * GTK_WIDGET(view)->style->xthickness;
6085                 height -= 2 * GTK_WIDGET(view)->style->ythickness;
6086         }
6087
6088         gtk_widget_size_request (scrolled_window->vscrollbar, &vsb_requisition);
6089         gtk_widget_size_request (scrolled_window->hscrollbar, &hsb_requisition);
6090         gtk_widget_style_get (GTK_WIDGET (scrolled_window),
6091                               "scrollbar_spacing",
6092                               &scrollbar_spacing,
6093                               NULL);
6094
6095         if (EV_IS_VIEW(view)) {
6096                 ev_view_set_zoom_for_size (EV_VIEW (view),
6097                                            MAX (1, width),
6098                                            MAX (1, height),
6099                                            vsb_requisition.width + scrollbar_spacing,
6100                                            hsb_requisition.height + scrollbar_spacing);
6101         }
6102 }