libview/ev-view.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *  Copyright (C) 2004 Red Hat, Inc
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <math.h>
  25 #include <string.h>
  26
  27 #include <glib/gi18n-lib.h>
  28 #include <gtk/gtk.h>
  29 #include <gdk/gdkkeysyms.h>
  30
  31 #include "ev-document-forms.h"
  32 #include "ev-document-images.h"
  33 #include "ev-document-links.h"
  34 #include "ev-document-misc.h"
  35 #include "ev-document-transition.h"
  36 #include "ev-page-cache.h"
  37 #include "ev-pixbuf-cache.h"
  38 #include "ev-transition-animation.h"
  39 #include "ev-view-marshal.h"
  40 #include "ev-view.h"
  41 #include "ev-view-accessible.h"
  42 #include "ev-view-private.h"
  43 #include "ev-view-type-builtins.h"
  44
  45 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  46 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  47 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  48
  49 enum {
  50         PROP_0,
  51         PROP_CONTINUOUS,
  52         PROP_DUAL_PAGE,
  53         PROP_FULLSCREEN,
  54         PROP_PRESENTATION,
  55         PROP_SIZING_MODE,
  56         PROP_ZOOM,
  57         PROP_ROTATION,
  58         PROP_HAS_SELECTION,
  59 };
  60
  61 enum {
  62         SIGNAL_BINDING_ACTIVATED,
  63         SIGNAL_ZOOM_INVALID,
  64         SIGNAL_HANDLE_LINK,
  65         SIGNAL_EXTERNAL_LINK,
  66         SIGNAL_POPUP_MENU,
  67         N_SIGNALS,
  68 };
  69
  70 enum {
  71         TARGET_DND_URI,
  72         TARGET_DND_TEXT,
  73         TARGET_DND_IMAGE
  74 };
  75
  76 static guint signals[N_SIGNALS];
  77
  78 typedef enum {
  79         EV_VIEW_FIND_NEXT,
  80         EV_VIEW_FIND_PREV
  81 } EvViewFindDirection;
  82
  83 #define ZOOM_IN_FACTOR  1.2
  84 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  85
  86 #define MIN_SCALE 0.05409
  87 #define MAX_SCALE 4.0
  88
  89 #define SCROLL_TIME 150
  90
  91 /*** Scrolling ***/
  92 static void       scroll_to_current_page                     (EvView *view,
  93                                                               GtkOrientation orientation);
  94 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  95                                                               GtkAdjustment      *hadjustment,
  96                                                               GtkAdjustment      *vadjustment);
  97 static void       view_update_range_and_current_page         (EvView             *view);
  98 static void       set_scroll_adjustment                      (EvView             *view,
  99                                                               GtkOrientation      orientation,
 100                                                               GtkAdjustment      *adjustment);
 101 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 102                                                               guint               keyval,
 103                                                               GdkModifierType modifiers,
 104                                                               GtkScrollType       scroll,
 105                                                               gboolean            horizontal);
 106 static void       ensure_rectangle_is_visible                (EvView             *view,
 107                                                               GdkRectangle       *rect);
 108
 109 /*** Geometry computations ***/
 110 static void       compute_border                             (EvView             *view,
 111                                                               int                 width,
 112                                                               int                 height,
 113                                                               GtkBorder          *border);
 114 static void       get_page_y_offset                          (EvView *view,
 115                                                               int page,
 116                                                               double zoom,
 117                                                               int *y_offset);
 118 static gboolean   get_page_extents                           (EvView             *view,
 119                                                               gint                page,
 120                                                               GdkRectangle       *page_area,
 121                                                               GtkBorder          *border);
 122 static void       view_rect_to_doc_rect                      (EvView             *view,
 123                                                               GdkRectangle       *view_rect,
 124                                                               GdkRectangle       *page_area,
 125                                                               EvRectangle        *doc_rect);
 126 static void       doc_rect_to_view_rect                      (EvView             *view,
 127                                                               int                 page,
 128                                                               EvRectangle        *doc_rect,
 129                                                               GdkRectangle       *view_rect);
 130 static void       find_page_at_location                      (EvView             *view,
 131                                                               gdouble             x,
 132                                                               gdouble             y,
 133                                                               gint               *page,
 134                                                               gint               *x_offset,
 135                                                               gint               *y_offset);
 136 static gboolean  doc_point_to_view_point                     (EvView             *view,
 137                                                               int                 page,
 138                                                               EvPoint            *doc_point,
 139                                                               GdkPoint           *view_point);
 140 /*** Hyperrefs ***/
 141 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 142                                                               gdouble             x,
 143                                                               gdouble             y);
 144 static char*      tip_from_link                              (EvView             *view,
 145                                                               EvLink             *link);
 146 /*** Forms ***/
 147 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 148                                                                gdouble            x,
 149                                                                gdouble            y);
 150
 151 /*** GtkWidget implementation ***/
 152 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 153                                                               GtkRequisition     *requisition);
 154 static void       ev_view_size_request_continuous            (EvView             *view,
 155                                                               GtkRequisition     *requisition);
 156 static void       ev_view_size_request_dual_page             (EvView             *view,
 157                                                               GtkRequisition     *requisition);
 158 static void       ev_view_size_request_single_page           (EvView             *view,
 159                                                               GtkRequisition     *requisition);
 160 static void       ev_view_size_request                       (GtkWidget          *widget,
 161                                                               GtkRequisition     *requisition);
 162 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 163                                                               GtkAllocation      *allocation);
 164 static void       ev_view_realize                            (GtkWidget          *widget);
 165 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 166                                                               GdkEventScroll     *event);
 167 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 168                                                               GdkEventExpose     *event);
 169 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 170 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 171                                                               GdkEventButton     *event);
 172 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 173                                                               GdkEventMotion     *event);
 174 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 175                                                               GdkEventButton     *event);
 176 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 177                                                               GdkEventCrossing   *event);
 178 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 179                                                               GdkEventCrossing   *event);
 180 static void       ev_view_style_set                          (GtkWidget          *widget,
 181                                                               GtkStyle           *old_style);
 182 static void       ev_view_remove_all                         (EvView             *view);
 183
 184 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 185
 186 /*** Drawing ***/
 187 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 188 static void       draw_rubberband                            (GtkWidget          *widget,
 189                                                               GdkWindow          *window,
 190                                                               const GdkRectangle *rect,
 191                                                               guchar              alpha);
 192 static void       highlight_find_results                     (EvView             *view,
 193                                                               int                 page);
 194 static void       draw_one_page                              (EvView             *view,
 195                                                               gint                page,
 196                                                               cairo_t            *cr,
 197                                                               GdkRectangle       *page_area,
 198                                                               GtkBorder          *border,
 199                                                               GdkRectangle       *expose_area,
 200                                                               gboolean           *page_ready);
 201 static void       draw_loading_text                          (EvView             *view,
 202                                                               GdkRectangle       *page_area,
 203                                                               GdkRectangle       *expose_area);
 204 static void       ev_view_reload_page                        (EvView             *view,
 205                                                               gint                page,
 206                                                               GdkRegion          *region);
 207
 208 /*** Callbacks ***/
 209 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 210                                                               GdkRegion          *region,
 211                                                               EvView             *view);
 212 static void       page_changed_cb                            (EvPageCache        *page_cache,
 213                                                               int                 new_page,
 214                                                               EvView             *view);
 215 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 216                                                               EvView             *view);
 217
 218 /*** GObject ***/
 219 static void       ev_view_finalize                           (GObject            *object);
 220 static void       ev_view_destroy                            (GtkObject          *object);
 221 static void       ev_view_set_property                       (GObject            *object,
 222                                                               guint               prop_id,
 223                                                               const GValue       *value,
 224                                                               GParamSpec         *pspec);
 225 static void       ev_view_get_property                       (GObject            *object,
 226                                                               guint               prop_id,
 227                                                               GValue             *value,
 228                                                               GParamSpec         *pspec);
 229 static void       ev_view_class_init                         (EvViewClass        *class);
 230 static void       ev_view_init                               (EvView             *view);
 231
 232 /*** Zoom and sizing ***/
 233 static double   zoom_for_size_fit_width                      (int doc_width,
 234                                                               int doc_height,
 235                                                               int target_width,
 236                                                               int target_height,
 237                                                               int vsb_width);
 238 static double   zoom_for_size_fit_height                     (int doc_width,
 239                                                               int doc_height,
 240                                                               int target_width,
 241                                                               int target_height,
 242                                                               int vsb_height);
 243 static double   zoom_for_size_best_fit                       (int doc_width,
 244                                                               int doc_height,
 245                                                               int target_width,
 246                                                               int target_height,
 247                                                               int vsb_width,
 248                                                               int hsb_width);
 249 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 250                                                               int     width,
 251                                                               int     height);
 252 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 253                                                                 int     width,
 254                                                                 int     height,
 255                                                                 int     vsb_width,
 256                                                                 int     hsb_height);
 257 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 258                                                                 int     width,
 259                                                                 int     height,
 260                                                                 int     vsb_width,
 261                                                                 int     hsb_height);
 262 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 263                                                                 int     width,
 264                                                                 int     height,
 265                                                                 int     vsb_width,
 266                                                                 int     hsb_height);
 267 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 268                                                                 int     width,
 269                                                                 int     height,
 270                                                                 int     vsb_width,
 271                                                                 int     hsb_height);
 272 /*** Cursors ***/
 273 static GdkCursor* ev_view_create_invisible_cursor            (void);
 274 static void       ev_view_set_cursor                         (EvView             *view,
 275                                                               EvViewCursor        new_cursor);
 276 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 277                                                               gint x,
 278                                                               gint y);
 279
 280 /*** Find ***/
 281 static gint         ev_view_find_get_n_results               (EvView             *view,
 282                                                               gint                page);
 283 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 284                                                               gint                page,
 285                                                               gint                result);
 286 static void       jump_to_find_result                        (EvView             *view);
 287 static void       jump_to_find_page                          (EvView             *view,
 288                                                               EvViewFindDirection direction,
 289                                                               gint                shift);
 290
 291 /*** Selection ***/
 292 static void       compute_selections                         (EvView             *view,
 293                                                               EvSelectionStyle    style,
 294                                                               GdkPoint           *start,
 295                                                               GdkPoint           *stop);
 296 static void       clear_selection                            (EvView             *view);
 297 static void       clear_link_selected                        (EvView             *view);
 298 static void       selection_free                             (EvViewSelection    *selection);
 299 static char*      get_selected_text                          (EvView             *ev_view);
 300 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 301                                                               GtkSelectionData   *selection_data,
 302                                                               guint               info,
 303                                                               gpointer            data);
 304 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 305                                                               gpointer            data);
 306 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 307
 308 /*** Presentation ***/
 309 static void       ev_view_presentation_transition_start      (EvView             *ev_view);
 310 static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
 311
 312
 313 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 314
 315 static void
 316 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 317 {
 318         GdkPoint view_point;
 319
 320         if (view->document == NULL) {
 321                 return;
 322         }
 323
 324         doc_point_to_view_point (view, view->current_page, &view->pending_point, &view_point);
 325
 326         if (orientation == GTK_ORIENTATION_VERTICAL) {
 327                 view->pending_point.y = 0;
 328         } else {
 329                 view->pending_point.x = 0;
 330         }
 331
 332         if (orientation == GTK_ORIENTATION_VERTICAL) {
 333                 if (view->continuous) {
 334                         gtk_adjustment_clamp_page (view->vadjustment,
 335                                                    view_point.y - view->spacing / 2,
 336                                                    view_point.y + view->vadjustment->page_size);
 337                 } else {
 338                         gtk_adjustment_set_value (view->vadjustment,
 339                                                   CLAMP (view_point.y,
 340                                                   view->vadjustment->lower,
 341                                                   view->vadjustment->upper -
 342                                                   view->vadjustment->page_size));
 343                 }
 344         } else {
 345                 if (view->dual_page) {
 346                         gtk_adjustment_clamp_page (view->hadjustment,
 347                                                    view_point.x,
 348                                                    view_point.x + view->hadjustment->page_size);
 349                 } else {
 350                         gtk_adjustment_set_value (view->hadjustment,
 351                                                   CLAMP (view_point.x,
 352                                                   view->hadjustment->lower,
 353                                                   view->hadjustment->upper -
 354                                                   view->hadjustment->page_size));
 355                 }
 356         }
 357 }
 358
 359 static void
 360 view_set_adjustment_values (EvView         *view,
 361                             GtkOrientation  orientation)
 362 {
 363         GtkWidget *widget = GTK_WIDGET (view);
 364         GtkAdjustment *adjustment;
 365         int requisition;
 366         int allocation;
 367
 368         double factor;
 369         gint new_value;
 370
 371         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 372                 requisition = widget->requisition.width;
 373                 allocation = widget->allocation.width;
 374                 adjustment = view->hadjustment;
 375         } else {
 376                 requisition = widget->requisition.height;
 377                 allocation = widget->allocation.height;
 378                 adjustment = view->vadjustment;
 379         }
 380
 381         if (!adjustment)
 382                 return;
 383
 384         factor = 1.0;
 385         switch (view->pending_scroll) {
 386                 case SCROLL_TO_KEEP_POSITION:
 387                 case SCROLL_TO_FIND_LOCATION:
 388                         factor = (adjustment->value) / adjustment->upper;
 389                         break;
 390                 case SCROLL_TO_PAGE_POSITION:
 391                         break;
 392                 case SCROLL_TO_CENTER:
 393                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 394                         break;
 395         }
 396
 397         adjustment->page_size = allocation;
 398         adjustment->step_increment = allocation * 0.1;
 399         adjustment->page_increment = allocation * 0.9;
 400         adjustment->lower = 0;
 401         adjustment->upper = MAX (allocation, requisition);
 402
 403         /*
 404          * We add 0.5 to the values before to average out our rounding errors.
 405          */
 406         switch (view->pending_scroll) {
 407                 case SCROLL_TO_KEEP_POSITION:
 408                 case SCROLL_TO_FIND_LOCATION:
 409                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 410                         gtk_adjustment_set_value (adjustment, (int)new_value);
 411                         break;
 412                 case SCROLL_TO_PAGE_POSITION:
 413                         scroll_to_current_page (view, orientation);
 414                         break;
 415                 case SCROLL_TO_CENTER:
 416                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 417                                            0, adjustment->upper - adjustment->page_size);
 418                         gtk_adjustment_set_value (adjustment, (int)new_value);
 419                         break;
 420         }
 421
 422         gtk_adjustment_changed (adjustment);
 423 }
 424
 425 static void
 426 view_update_range_and_current_page (EvView *view)
 427 {
 428         gint current_page;
 429         gint best_current_page = -1;
 430
 431         /* Presentation trumps all other modes */
 432         if (view->presentation) {
 433                 view->start_page = view->current_page;
 434                 view->end_page = view->current_page;
 435         } else if (view->continuous) {
 436                 GdkRectangle current_area, unused, page_area;
 437                 GtkBorder border;
 438                 gboolean found = FALSE;
 439                 gint area_max = -1, area;
 440                 int i;
 441
 442                 if (!(view->vadjustment && view->hadjustment))
 443                         return;
 444
 445                 current_area.x = view->hadjustment->value;
 446                 current_area.width = view->hadjustment->upper;
 447                 current_area.y = view->vadjustment->value;
 448                 current_area.height = view->vadjustment->page_size;
 449
 450                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 451
 452                         get_page_extents (view, i, &page_area, &border);
 453
 454                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 455                                 area = unused.width * unused.height;
 456
 457                                 if (!found) {
 458                                         area_max = area;
 459                                         view->start_page = i;
 460                                         found = TRUE;
 461                                         best_current_page = i;
 462                                 }
 463                                 if (area > area_max) {
 464                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 465                                         area_max = area;
 466                                 }
 467
 468                                 view->end_page = i;
 469                         } else if (found && view->current_page <= view->end_page) {
 470                                 break;
 471                         }
 472                 }
 473
 474         } else if (view->dual_page) {
 475                 if (view->current_page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) {
 476                         view->start_page = view->current_page;
 477                         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 478                                 view->end_page = view->start_page + 1;
 479                         else
 480                                 view->end_page = view->start_page;
 481                 } else {
 482                         if (view->current_page < 1)
 483                                 view->start_page = view->current_page;
 484                         else
 485                                 view->start_page = view->current_page - 1;
 486                         view->end_page = view->current_page;
 487                 }
 488         } else {
 489                 view->start_page = view->current_page;
 490                 view->end_page = view->current_page;
 491         }
 492
 493         best_current_page = MAX (best_current_page, view->start_page);
 494         current_page = ev_page_cache_get_current_page (view->page_cache);
 495
 496         if ((current_page != best_current_page) && (view->pending_scroll == SCROLL_TO_KEEP_POSITION)) {
 497                 view->current_page = best_current_page;
 498                 ev_page_cache_set_current_page (view->page_cache, best_current_page);
 499         }
 500
 501         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 502                                         view->start_page,
 503                                         view->end_page,
 504                                         view->rotation,
 505                                         view->scale,
 506                                         view->selection_info.selections);
 507 }
 508
 509 static void
 510 set_scroll_adjustment (EvView *view,
 511                        GtkOrientation  orientation,
 512                        GtkAdjustment  *adjustment)
 513 {
 514         GtkAdjustment **to_set;
 515
 516         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 517                 to_set = &view->hadjustment;
 518         else
 519                 to_set = &view->vadjustment;
 520
 521         if (*to_set != adjustment) {
 522                 if (*to_set) {
 523                         g_signal_handlers_disconnect_by_func (*to_set,
 524                                                               (gpointer) on_adjustment_value_changed,
 525                                                               view);
 526                         g_object_unref (*to_set);
 527                 }
 528
 529                 *to_set = adjustment;
 530                 view_set_adjustment_values (view, orientation);
 531
 532                 if (*to_set) {
 533                         g_object_ref (*to_set);
 534                         g_signal_connect (*to_set, "value_changed",
 535                                           G_CALLBACK (on_adjustment_value_changed), view);
 536                 }
 537         }
 538 }
 539
 540 static void
 541 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 542                                 GtkAdjustment  *hadjustment,
 543                                 GtkAdjustment  *vadjustment)
 544 {
 545         EvView *view = EV_VIEW (layout);
 546
 547         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 548         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 549
 550         on_adjustment_value_changed (NULL, view);
 551 }
 552
 553 static void
 554 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 555                            guint           keyval,
 556                            GdkModifierType modifiers,
 557                            GtkScrollType   scroll,
 558                            gboolean        horizontal)
 559 {
 560   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 561
 562   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 563                                 "binding_activated", 2,
 564                                 GTK_TYPE_SCROLL_TYPE, scroll,
 565                                 G_TYPE_BOOLEAN, horizontal);
 566   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 567                                 "binding_activated", 2,
 568                                 GTK_TYPE_SCROLL_TYPE, scroll,
 569                                 G_TYPE_BOOLEAN, horizontal);
 570 }
 571
 572 void
 573 ev_view_scroll (EvView        *view,
 574                 GtkScrollType  scroll,
 575                 gboolean       horizontal)
 576 {
 577         GtkAdjustment *adjustment;
 578         double value, increment;
 579         gboolean first_page = FALSE;
 580         gboolean last_page = FALSE;
 581
 582         view->jump_to_find_result = FALSE;
 583
 584         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 585                 switch (scroll) {
 586                         case GTK_SCROLL_PAGE_BACKWARD:
 587                         case GTK_SCROLL_STEP_BACKWARD:
 588                                 ev_view_previous_page (view);
 589                                 break;
 590                         case GTK_SCROLL_PAGE_FORWARD:
 591                         case GTK_SCROLL_STEP_FORWARD:
 592                                 ev_view_next_page (view);
 593                                 break;
 594                         default:
 595                                 break;
 596                 }
 597                 return;
 598         }
 599
 600         /* Assign values for increment and vertical adjustment */
 601         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 602         increment = adjustment->page_size * 0.75;
 603         value = adjustment->value;
 604
 605         /* Assign boolean for first and last page */
 606         if (view->current_page == 0)
 607                 first_page = TRUE;
 608         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 609                 last_page = TRUE;
 610
 611         switch (scroll) {
 612                 case GTK_SCROLL_PAGE_BACKWARD:
 613                         /* Do not jump backwards if at the first page */
 614                         if (value == (adjustment->lower) && first_page) {
 615                                 /* Do nothing */
 616                                 /* At the top of a page, assign the upper bound limit of previous page */
 617                         } else if (value == (adjustment->lower)) {
 618                                 value = adjustment->upper - adjustment->page_size;
 619                                 ev_view_previous_page (view);
 620                                 /* Jump to the top */
 621                         } else {
 622                                 value = MAX (value - increment, adjustment->lower);
 623                         }
 624                         break;
 625                 case GTK_SCROLL_PAGE_FORWARD:
 626                         /* Do not jump forward if at the last page */
 627                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 628                                 /* Do nothing */
 629                         /* At the bottom of a page, assign the lower bound limit of next page */
 630                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 631                                 value = 0;
 632                                 ev_view_next_page (view);
 633                         /* Jump to the bottom */
 634                         } else {
 635                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 636                         }
 637                         break;
 638                 case GTK_SCROLL_STEP_BACKWARD:
 639                         value -= adjustment->step_increment;
 640                         break;
 641                 case GTK_SCROLL_STEP_FORWARD:
 642                         value += adjustment->step_increment;
 643                         break;
 644                 case GTK_SCROLL_STEP_DOWN:
 645                         value -= adjustment->step_increment / 10;
 646                         break;
 647                 case GTK_SCROLL_STEP_UP:
 648                         value += adjustment->step_increment / 10;
 649                         break;
 650                 default:
 651                         break;
 652         }
 653
 654         value = CLAMP (value, adjustment->lower,
 655                        adjustment->upper - adjustment->page_size);
 656
 657         gtk_adjustment_set_value (adjustment, value);
 658 }
 659
 660 #define MARGIN 5
 661
 662 static void
 663 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 664 {
 665         GtkWidget *widget = GTK_WIDGET (view);
 666         GtkAdjustment *adjustment;
 667         int value;
 668
 669         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 670
 671         adjustment = view->vadjustment;
 672
 673         if (rect->y < adjustment->value) {
 674                 value = MAX (adjustment->lower, rect->y - MARGIN);
 675                 gtk_adjustment_set_value (view->vadjustment, value);
 676         } else if (rect->y + rect->height >
 677                    adjustment->value + widget->allocation.height) {
 678                 value = MIN (adjustment->upper, rect->y + rect->height -
 679                              widget->allocation.height + MARGIN);
 680                 gtk_adjustment_set_value (view->vadjustment, value);
 681         }
 682
 683         adjustment = view->hadjustment;
 684
 685         if (rect->x < adjustment->value) {
 686                 value = MAX (adjustment->lower, rect->x - MARGIN);
 687                 gtk_adjustment_set_value (view->hadjustment, value);
 688         } else if (rect->x + rect->height >
 689                    adjustment->value + widget->allocation.width) {
 690                 value = MIN (adjustment->upper, rect->x + rect->width -
 691                              widget->allocation.width + MARGIN);
 692                 gtk_adjustment_set_value (view->hadjustment, value);
 693         }
 694
 695         gtk_widget_queue_resize (GTK_WIDGET (view));
 696 }
 697
 698 /*** Geometry computations ***/
 699
 700 static void
 701 compute_border (EvView *view, int width, int height, GtkBorder *border)
 702 {
 703         if (view->presentation) {
 704                 border->left = 0;
 705                 border->right = 0;
 706                 border->top = 0;
 707                 border->bottom = 0;
 708         } else {
 709                 ev_document_misc_get_page_border_size (width, height, border);
 710         }
 711 }
 712
 713 static void
 714 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 715 {
 716         int max_width, offset;
 717         GtkBorder border;
 718
 719         g_return_if_fail (y_offset != NULL);
 720
 721         ev_page_cache_get_max_width (view->page_cache, view->rotation, zoom, &max_width);
 722
 723         compute_border (view, max_width, max_width, &border);
 724
 725         if (view->dual_page) {
 726                 ev_page_cache_get_height_to_page (view->page_cache, page,
 727                                                   view->rotation, zoom, NULL, &offset);
 728                 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);
 729         } else {
 730                 ev_page_cache_get_height_to_page (view->page_cache, page,
 731                                                   view->rotation, zoom, &offset, NULL);
 732                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 733         }
 734
 735         *y_offset = offset;
 736         return;
 737 }
 738
 739 static gboolean
 740 get_page_extents (EvView       *view,
 741                   gint          page,
 742                   GdkRectangle *page_area,
 743                   GtkBorder    *border)
 744 {
 745         GtkWidget *widget;
 746         int width, height;
 747
 748         widget = GTK_WIDGET (view);
 749
 750         /* Get the size of the page */
 751         ev_page_cache_get_size (view->page_cache, page,
 752                                 view->rotation,
 753                                 view->scale,
 754                                 &width, &height);
 755         compute_border (view, width, height, border);
 756         page_area->width = width + border->left + border->right;
 757         page_area->height = height + border->top + border->bottom;
 758
 759         if (view->presentation) {
 760                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 761                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 762         } else if (view->continuous) {
 763                 gint max_width;
 764                 gint x, y;
 765
 766                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 767                                              view->scale, &max_width);
 768                 max_width = max_width + border->left + border->right;
 769                 /* Get the location of the bounding box */
 770                 if (view->dual_page) {
 771                         x = view->spacing + ((page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? 0 : 1) * (max_width + view->spacing);
 772                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 773                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 774                                 x = x + (max_width - width - border->left - border->right);
 775                 } else {
 776                         x = view->spacing;
 777                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 778                 }
 779
 780                 get_page_y_offset (view, page, view->scale, &y);
 781
 782                 page_area->x = x;
 783                 page_area->y = y;
 784         } else {
 785                 gint x, y;
 786                 if (view->dual_page) {
 787                         gint width_2, height_2;
 788                         gint max_width = width;
 789                         gint max_height = height;
 790                         GtkBorder overall_border;
 791                         gint other_page;
 792
 793                         other_page = (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? page + 1: page - 1;
 794
 795                         /* First, we get the bounding box of the two pages */
 796                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)
 797                             && (0 <= other_page)) {
 798                                 ev_page_cache_get_size (view->page_cache,
 799                                                         other_page,
 800                                                         view->rotation,
 801                                                         view->scale,
 802                                                         &width_2, &height_2);
 803                                 if (width_2 > width)
 804                                         max_width = width_2;
 805                                 if (height_2 > height)
 806                                         max_height = height_2;
 807                         }
 808                         compute_border (view, max_width, max_height, &overall_border);
 809
 810                         /* Find the offsets */
 811                         x = view->spacing;
 812                         y = view->spacing;
 813
 814                         /* Adjust for being the left or right page */
 815                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 816                                 x = x + max_width - width;
 817                         else
 818                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 819
 820                         y = y + (max_height - height)/2;
 821
 822                         /* Adjust for extra allocation */
 823                         x = x + MAX (0, widget->allocation.width -
 824                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 825                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 826                 } else {
 827                         x = view->spacing;
 828                         y = view->spacing;
 829
 830                         /* Adjust for extra allocation */
 831                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 832                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 833                 }
 834
 835                 page_area->x = x;
 836                 page_area->y = y;
 837         }
 838
 839         return TRUE;
 840 }
 841
 842 static void
 843 view_point_to_doc_point (EvView *view,
 844                          GdkPoint *view_point,
 845                          GdkRectangle *page_area,
 846                          double  *doc_point_x,
 847                          double  *doc_point_y)
 848 {
 849         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 850         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 851 }
 852
 853 static void
 854 view_rect_to_doc_rect (EvView *view,
 855                        GdkRectangle *view_rect,
 856                        GdkRectangle *page_area,
 857                        EvRectangle  *doc_rect)
 858 {
 859         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 860         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 861         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 862         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 863 }
 864
 865 static gboolean
 866 doc_point_to_view_point (EvView       *view,
 867                          int           page,
 868                          EvPoint      *doc_point,
 869                          GdkPoint     *view_point)
 870 {
 871         GdkRectangle page_area;
 872         GtkBorder border;
 873         double x, y, view_x, view_y;
 874         int width, height;
 875
 876         ev_page_cache_get_size (view->page_cache, page,
 877                                 view->rotation,
 878                                 1.0,
 879                                 &width, &height);
 880
 881         if (view->rotation == 0) {
 882                 x = doc_point->x;
 883                 y = doc_point->y;
 884         } else if (view->rotation == 90) {
 885                 x = width - doc_point->y;
 886                 y = doc_point->x;
 887         } else if (view->rotation == 180) {
 888                 x = width - doc_point->x;
 889                 y = height - doc_point->y;
 890         } else if (view->rotation == 270) {
 891                 x = doc_point->y;
 892                 y = height - doc_point->x;
 893         } else {
 894                 g_assert_not_reached ();
 895         }
 896
 897         get_page_extents (view, page, &page_area, &border);
 898
 899         view_x = x * view->scale;
 900         view_y = y * view->scale;
 901         view_point->x = view_x + page_area.x;
 902         view_point->y = view_y + page_area.y;
 903
 904         return (view_x > 0 && view_x <= page_area.width &&
 905                 view_y > 0 && view_y <= page_area.height);
 906 }
 907
 908 static void
 909 doc_rect_to_view_rect (EvView       *view,
 910                        int           page,
 911                        EvRectangle  *doc_rect,
 912                        GdkRectangle *view_rect)
 913 {
 914         GdkRectangle page_area;
 915         GtkBorder border;
 916         double x, y, w, h;
 917         int width, height;
 918
 919         ev_page_cache_get_size (view->page_cache, page,
 920                                 view->rotation,
 921                                 1.0,
 922                                 &width, &height);
 923
 924         if (view->rotation == 0) {
 925                 x = doc_rect->x1;
 926                 y = doc_rect->y1;
 927                 w = doc_rect->x2 - doc_rect->x1;
 928                 h = doc_rect->y2 - doc_rect->y1;
 929         } else if (view->rotation == 90) {
 930                 x = width - doc_rect->y2;
 931                 y = doc_rect->x1;
 932                 w = doc_rect->y2 - doc_rect->y1;
 933                 h = doc_rect->x2 - doc_rect->x1;
 934         } else if (view->rotation == 180) {
 935                 x = width - doc_rect->x2;
 936                 y = height - doc_rect->y2;
 937                 w = doc_rect->x2 - doc_rect->x1;
 938                 h = doc_rect->y2 - doc_rect->y1;
 939         } else if (view->rotation == 270) {
 940                 x = doc_rect->y1;
 941                 y = height - doc_rect->x2;
 942                 w = doc_rect->y2 - doc_rect->y1;
 943                 h = doc_rect->x2 - doc_rect->x1;
 944         } else {
 945                 g_assert_not_reached ();
 946         }
 947
 948         get_page_extents (view, page, &page_area, &border);
 949
 950         view_rect->x = x * view->scale + page_area.x;
 951         view_rect->y = y * view->scale + page_area.y;
 952         view_rect->width = w * view->scale;
 953         view_rect->height = h * view->scale;
 954 }
 955
 956 static void
 957 find_page_at_location (EvView  *view,
 958                        gdouble  x,
 959                        gdouble  y,
 960                        gint    *page,
 961                        gint    *x_offset,
 962                        gint    *y_offset)
 963 {
 964         int i;
 965
 966         if (view->document == NULL)
 967                 return;
 968
 969         g_assert (page);
 970         g_assert (x_offset);
 971         g_assert (y_offset);
 972
 973         for (i = view->start_page; i <= view->end_page; i++) {
 974                 GdkRectangle page_area;
 975                 GtkBorder border;
 976
 977                 if (! get_page_extents (view, i, &page_area, &border))
 978                         continue;
 979
 980                 if ((x >= page_area.x + border.left) &&
 981                     (x < page_area.x + page_area.width - border.right) &&
 982                     (y >= page_area.y + border.top) &&
 983                     (y < page_area.y + page_area.height - border.bottom)) {
 984                         *page = i;
 985                         *x_offset = x - (page_area.x + border.left);
 986                         *y_offset = y - (page_area.y + border.top);
 987                         return;
 988                 }
 989         }
 990
 991         *page = -1;
 992 }
 993
 994 static gboolean
 995 location_in_text (EvView  *view,
 996                   gdouble  x,
 997                   gdouble  y)
 998 {
 999         GdkRegion *region;
1000         gint page = -1;
1001         gint x_offset = 0, y_offset = 0;
1002
1003         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1004
1005         if (page == -1)
1006                 return FALSE;
1007
1008         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1009
1010         if (region)
1011                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1012         else
1013                 return FALSE;
1014 }
1015
1016 static int
1017 ev_view_get_width (EvView *view)
1018 {
1019         return GTK_WIDGET (view)->allocation.width;
1020 }
1021
1022 static int
1023 ev_view_get_height (EvView *view)
1024 {
1025         return GTK_WIDGET (view)->allocation.height;
1026 }
1027
1028 static gboolean
1029 location_in_selected_text (EvView  *view,
1030                            gdouble  x,
1031                            gdouble  y)
1032 {
1033         gint page = -1;
1034         gint x_offset = 0, y_offset = 0;
1035         EvViewSelection *selection;
1036         GList *l = NULL;
1037
1038         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1039                 selection = (EvViewSelection *)l->data;
1040
1041                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1042
1043                 if (page != selection->page)
1044                         continue;
1045
1046                 if (selection->covered_region &&
1047                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1048                         return TRUE;
1049         }
1050
1051         return FALSE;
1052 }
1053
1054 static gboolean
1055 get_doc_point_from_offset (EvView *view,
1056                            gint    page,
1057                            gint    x_offset,
1058                            gint    y_offset,
1059                            gint   *x_new,
1060                            gint   *y_new)
1061 {
1062         int width, height;
1063         double x, y;
1064
1065         ev_page_cache_get_size (view->page_cache, page,
1066                                 view->rotation,
1067                                 1.0,
1068                                 &width, &height);
1069
1070         x_offset = x_offset / view->scale;
1071         y_offset = y_offset / view->scale;
1072
1073         if (view->rotation == 0) {
1074                 x = x_offset;
1075                 y = y_offset;
1076         } else if (view->rotation == 90) {
1077                 x = y_offset;
1078                 y = width - x_offset;
1079         } else if (view->rotation == 180) {
1080                 x = width - x_offset;
1081                 y = height - y_offset;
1082         } else if (view->rotation == 270) {
1083                 x = height - y_offset;
1084                 y = x_offset;
1085         } else {
1086                 g_assert_not_reached ();
1087         }
1088
1089         *x_new = x;
1090         *y_new = y;
1091
1092         return TRUE;
1093 }
1094
1095 /*** Hyperref ***/
1096 static EvLink *
1097 ev_view_get_link_at_location (EvView  *view,
1098                               gdouble  x,
1099                               gdouble  y)
1100 {
1101         gint page = -1;
1102         gint x_offset = 0, y_offset = 0;
1103         gint x_new = 0, y_new = 0;
1104         GList *link_mapping;
1105
1106         if (!EV_IS_DOCUMENT_LINKS (view->document))
1107                 return NULL;
1108
1109         x += view->scroll_x;
1110         y += view->scroll_y;
1111
1112         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1113
1114         if (page == -1)
1115                 return NULL;
1116
1117
1118         if (get_doc_point_from_offset (view, page, x_offset,
1119                                        y_offset, &x_new, &y_new) == FALSE)
1120                 return NULL;
1121
1122         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1123
1124         if (link_mapping)
1125                 return ev_link_mapping_find (link_mapping, x_new, y_new);
1126         else
1127                 return NULL;
1128 }
1129
1130 static void
1131 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1132 {
1133         EvPoint doc_point;
1134         gdouble zoom, left, top;
1135         gboolean change_left, change_top;
1136
1137         left = ev_link_dest_get_left (dest, &change_left);
1138         top = ev_link_dest_get_top (dest, &change_top);
1139
1140         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1141                                        ev_link_dest_get_bottom (dest) - top,
1142                                        ev_view_get_width (view),
1143                                        ev_view_get_height (view), 0, 0);
1144
1145         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1146         ev_view_set_zoom (view, zoom, FALSE);
1147
1148         doc_point.x = change_left ? left : 0;
1149         doc_point.y = change_top ? top : 0;
1150
1151         view->current_page = ev_link_dest_get_page (dest);
1152         if (change_left || change_top)
1153                 view->pending_point = doc_point;
1154         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1155
1156         gtk_widget_queue_resize (GTK_WIDGET (view));
1157 }
1158
1159 static void
1160 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1161 {
1162         EvPoint doc_point;
1163         int doc_width, doc_height, page;
1164         double zoom, left;
1165         gboolean change_left;
1166
1167         page = ev_link_dest_get_page (dest);
1168         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1169
1170         left = ev_link_dest_get_left (dest, &change_left);
1171         doc_point.x = change_left ? left : 0;
1172         doc_point.y = 0;
1173
1174         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1175                                          ev_view_get_width (view),
1176                                          ev_view_get_height (view), 0);
1177
1178         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1179         ev_view_set_zoom (view, zoom, FALSE);
1180
1181         view->current_page = page;
1182         if (change_left)
1183                 view->pending_point = doc_point;
1184         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1185
1186         gtk_widget_queue_resize (GTK_WIDGET (view));
1187 }
1188
1189 static void
1190 goto_fith_dest (EvView *view, EvLinkDest *dest)
1191 {
1192         EvPoint doc_point;
1193         int doc_width, doc_height, page;
1194         gdouble zoom, top;
1195         gboolean change_top;
1196
1197         page = ev_link_dest_get_page (dest);
1198         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1199
1200         top = ev_link_dest_get_top (dest, &change_top);
1201
1202         doc_point.x = 0;
1203         doc_point.y = change_top ? top : 0;
1204
1205         zoom = zoom_for_size_fit_width (doc_width, top,
1206                                         ev_view_get_width (view),
1207                                         ev_view_get_height (view), 0);
1208
1209         ev_view_set_sizing_mode (view, EV_SIZING_FIT_WIDTH);
1210         ev_view_set_zoom (view, zoom, FALSE);
1211
1212         view->current_page = page;
1213         if (change_top)
1214                 view->pending_point = doc_point;
1215         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1216
1217         gtk_widget_queue_resize (GTK_WIDGET (view));
1218 }
1219
1220 static void
1221 goto_fit_dest (EvView *view, EvLinkDest *dest)
1222 {
1223         double zoom;
1224         int doc_width, doc_height;
1225         int page;
1226
1227         page = ev_link_dest_get_page (dest);
1228         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1229
1230         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1231                                        ev_view_get_height (view), 0, 0);
1232
1233         ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
1234         ev_view_set_zoom (view, zoom, FALSE);
1235
1236         view->current_page = page;
1237         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1238
1239         gtk_widget_queue_resize (GTK_WIDGET (view));
1240 }
1241
1242 static void
1243 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1244 {
1245         EvPoint doc_point;
1246         gint page;
1247         gdouble zoom, left, top;
1248         gboolean change_zoom, change_left, change_top;
1249
1250         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1251         page = ev_link_dest_get_page (dest);
1252
1253         if (change_zoom && zoom > 1) {
1254                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1255                 ev_view_set_zoom (view, zoom, FALSE);
1256         }
1257
1258         left = ev_link_dest_get_left (dest, &change_left);
1259         top = ev_link_dest_get_top (dest, &change_top);
1260
1261         doc_point.x = change_left ? left : 0;
1262         doc_point.y = change_top ? top : 0;
1263
1264         view->current_page = page;
1265         if (change_left || change_top)
1266                 view->pending_point = doc_point;
1267         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1268
1269         gtk_widget_queue_resize (GTK_WIDGET (view));
1270 }
1271
1272 static void
1273 goto_dest (EvView *view, EvLinkDest *dest)
1274 {
1275         EvLinkDestType type;
1276         int page, n_pages, current_page;
1277
1278         page = ev_link_dest_get_page (dest);
1279         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1280
1281         if (page < 0 || page >= n_pages)
1282                 return;
1283
1284         current_page = view->current_page;
1285
1286         type = ev_link_dest_get_dest_type (dest);
1287
1288         switch (type) {
1289                 case EV_LINK_DEST_TYPE_PAGE:
1290                         ev_page_cache_set_current_page (view->page_cache, page);
1291                         break;
1292                 case EV_LINK_DEST_TYPE_FIT:
1293                         goto_fit_dest (view, dest);
1294                         break;
1295                 case EV_LINK_DEST_TYPE_FITH:
1296                         goto_fith_dest (view, dest);
1297                         break;
1298                 case EV_LINK_DEST_TYPE_FITV:
1299                         goto_fitv_dest (view, dest);
1300                         break;
1301                 case EV_LINK_DEST_TYPE_FITR:
1302                         goto_fitr_dest (view, dest);
1303                         break;
1304                 case EV_LINK_DEST_TYPE_XYZ:
1305                         goto_xyz_dest (view, dest);
1306                         break;
1307                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1308                         ev_page_cache_set_page_label (view->page_cache, ev_link_dest_get_page_label (dest));
1309                         break;
1310                 default:
1311                         g_assert_not_reached ();
1312         }
1313
1314         if (current_page != view->current_page)
1315                 ev_page_cache_set_current_page (view->page_cache,
1316                                                 view->current_page);
1317 }
1318
1319 static void
1320 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1321 {
1322         EvLinkDestType type;
1323
1324         type = ev_link_dest_get_dest_type (dest);
1325
1326         if (type == EV_LINK_DEST_TYPE_NAMED) {
1327                 EvLinkDest  *dest2;
1328                 const gchar *named_dest;
1329
1330                 named_dest = ev_link_dest_get_named_dest (dest);
1331                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1332                                                           named_dest);
1333                 if (dest2) {
1334                         goto_dest (view, dest2);
1335                         g_object_unref (dest2);
1336                 }
1337
1338                 return;
1339         }
1340
1341         goto_dest (view, dest);
1342 }
1343
1344 void
1345 ev_view_handle_link (EvView *view, EvLink *link)
1346 {
1347         EvLinkAction    *action = NULL;
1348         EvLinkActionType type;
1349
1350         action = ev_link_get_action (link);
1351         if (!action)
1352                 return;
1353
1354         type = ev_link_action_get_action_type (action);
1355
1356         switch (type) {
1357                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1358                         EvLinkDest *dest;
1359
1360                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1361
1362                         dest = ev_link_action_get_dest (action);
1363                         ev_view_goto_dest (view, dest);
1364                 }
1365                         break;
1366                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1367                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1368                 case EV_LINK_ACTION_TYPE_LAUNCH:
1369                 case EV_LINK_ACTION_TYPE_NAMED:
1370                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1371                         break;
1372         }
1373 }
1374
1375 gchar *
1376 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1377 {
1378         EvLinkDestType type;
1379         gchar *msg = NULL;
1380
1381         type = ev_link_dest_get_dest_type (dest);
1382
1383         switch (type) {
1384                 case EV_LINK_DEST_TYPE_NAMED: {
1385                         EvLinkDest  *dest2;
1386                         const gchar *named_dest;
1387
1388                         named_dest = ev_link_dest_get_named_dest (dest);
1389                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1390                                                                   named_dest);
1391                         if (dest2) {
1392                                 msg = ev_page_cache_get_page_label (view->page_cache,
1393                                                                     ev_link_dest_get_page (dest2));
1394                                 g_object_unref (dest2);
1395                         }
1396                 }
1397
1398                         break;
1399                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1400                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1401                 }
1402                         break;
1403                 default:
1404                         msg = ev_page_cache_get_page_label (view->page_cache,
1405                                                             ev_link_dest_get_page (dest));
1406         }
1407
1408         return msg;
1409 }
1410
1411 static char *
1412 tip_from_action_named (EvLinkAction *action)
1413 {
1414         const gchar *name = ev_link_action_get_name (action);
1415
1416         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1417                 return g_strdup (_("Go to first page"));
1418         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1419                 return g_strdup (_("Go to previous page"));
1420         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1421                 return g_strdup (_("Go to next page"));
1422         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1423                 return g_strdup (_("Go to last page"));
1424         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1425                 return g_strdup (_("Go to page"));
1426         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1427                 return g_strdup (_("Find"));
1428         }
1429
1430         return NULL;
1431 }
1432
1433 static char *
1434 tip_from_link (EvView *view, EvLink *link)
1435 {
1436         EvLinkAction *action;
1437         EvLinkActionType type;
1438         char *msg = NULL;
1439         char *page_label;
1440         const char *title;
1441
1442         action = ev_link_get_action (link);
1443         title = ev_link_get_title (link);
1444
1445         if (!action)
1446                 return title ? g_strdup (title) : NULL;
1447
1448         type = ev_link_action_get_action_type (action);
1449
1450         switch (type) {
1451                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1452                         page_label = ev_view_page_label_from_dest (view,
1453                                                                    ev_link_action_get_dest (action));
1454                         if (page_label) {
1455                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1456                                 g_free (page_label);
1457                         }
1458                         break;
1459                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1460                         if (title) {
1461                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1462                                                        ev_link_action_get_filename (action));
1463                         } else {
1464                                 msg = g_strdup_printf (_("Go to file “%s”"),
1465                                                        ev_link_action_get_filename (action));
1466                         }
1467                         break;
1468                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1469                         msg = g_strdup (ev_link_action_get_uri (action));
1470                         break;
1471                 case EV_LINK_ACTION_TYPE_LAUNCH:
1472                         msg = g_strdup_printf (_("Launch %s"),
1473                                                ev_link_action_get_filename (action));
1474                         break;
1475                 case EV_LINK_ACTION_TYPE_NAMED:
1476                         msg = tip_from_action_named (action);
1477                         break;
1478                 default:
1479                         if (title)
1480                                 msg = g_strdup (title);
1481                         break;
1482         }
1483
1484         return msg;
1485 }
1486
1487 static void
1488 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1489 {
1490         EvLink      *link;
1491         EvFormField *field;
1492
1493         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1494                 return;
1495
1496         if (view->drag_info.in_drag) {
1497                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1498                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1499                 return;
1500         }
1501
1502         if (view->scroll_info.autoscrolling) {
1503                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1504                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1505                 return;
1506         }
1507
1508         link = ev_view_get_link_at_location (view, x, y);
1509         if (link) {
1510                 g_object_set (view, "has-tooltip", TRUE, NULL);
1511                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1512         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1513                 if (field->is_read_only) {
1514                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1515                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1516                             view->cursor == EV_VIEW_CURSOR_DRAG)
1517                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1518                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1519                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1520                 } else {
1521                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1522                 }
1523         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1524                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1525         } else {
1526                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1527                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1528                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1529                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1530                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1531         }
1532 }
1533
1534 /*** Images ***/
1535 static EvImage *
1536 ev_view_get_image_at_location (EvView  *view,
1537                                gdouble  x,
1538                                gdouble  y)
1539 {
1540         gint page = -1;
1541         gint x_offset = 0, y_offset = 0;
1542         gint x_new = 0, y_new = 0;
1543         GList *image_mapping;
1544
1545         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1546                 return NULL;
1547
1548         x += view->scroll_x;
1549         y += view->scroll_y;
1550
1551         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1552
1553         if (page == -1)
1554                 return NULL;
1555
1556         if (get_doc_point_from_offset (view, page, x_offset,
1557                                        y_offset, &x_new, &y_new) == FALSE)
1558                 return NULL;
1559
1560         image_mapping = ev_pixbuf_cache_get_image_mapping (view->pixbuf_cache, page);
1561
1562         if (image_mapping)
1563                 return ev_image_mapping_find (image_mapping, x_new, y_new);
1564         else
1565                 return NULL;
1566 }
1567
1568 /*** Forms ***/
1569 static EvFormField *
1570 ev_view_get_form_field_at_location (EvView  *view,
1571                                     gdouble  x,
1572                                     gdouble  y)
1573 {
1574         gint page = -1;
1575         gint x_offset = 0, y_offset = 0;
1576         gint x_new = 0, y_new = 0;
1577         GList *forms_mapping;
1578
1579         if (!EV_IS_DOCUMENT_FORMS (view->document))
1580                 return NULL;
1581
1582         x += view->scroll_x;
1583         y += view->scroll_y;
1584
1585         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1586
1587         if (page == -1)
1588                 return NULL;
1589
1590         if (get_doc_point_from_offset (view, page, x_offset,
1591                                        y_offset, &x_new, &y_new) == FALSE)
1592                 return NULL;
1593
1594         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, page);
1595
1596         if (forms_mapping)
1597                 return ev_form_field_mapping_find (forms_mapping, x_new, y_new);
1598         else
1599                 return NULL;
1600 }
1601
1602 static GdkRegion *
1603 ev_view_form_field_get_region (EvView      *view,
1604                                EvFormField *field)
1605 {
1606         EvRectangle  field_area;
1607         GdkRectangle view_area;
1608         GList       *forms_mapping;
1609
1610         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1611                                                                 field->page->index);
1612         ev_form_field_mapping_get_area (forms_mapping, field, &field_area);
1613         doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
1614         view_area.x -= view->scroll_x;
1615         view_area.y -= view->scroll_y;
1616
1617         return gdk_region_rectangle (&view_area);
1618 }
1619
1620 static gboolean
1621 ev_view_forms_remove_widgets (EvView *view)
1622 {
1623         ev_view_remove_all (view);
1624
1625         return FALSE;
1626 }
1627
1628 static void
1629 ev_view_form_field_destroy (GtkWidget *widget,
1630                             EvView    *view)
1631 {
1632         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1633 }
1634
1635 static GtkWidget *
1636 ev_view_form_field_button_create_widget (EvView      *view,
1637                                          EvFormField *field)
1638 {
1639         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1640         GdkRegion         *field_region = NULL;
1641
1642         switch (field_button->type) {
1643                 case EV_FORM_FIELD_BUTTON_PUSH:
1644                         return NULL;
1645                 case EV_FORM_FIELD_BUTTON_CHECK:
1646                 case EV_FORM_FIELD_BUTTON_RADIO: {
1647                         gboolean  state;
1648                         GList    *forms_mapping, *l;
1649
1650                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1651                                                                                field);
1652
1653                         /* FIXME: it actually depends on NoToggleToOff flags */
1654                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1655                             state && field_button->state)
1656                                 return NULL;
1657
1658                         field_region = ev_view_form_field_get_region (view, field);
1659
1660                         /* For radio buttons and checkbox buttons that are in a set
1661                          * we need to update also the region for the current selected item
1662                          */
1663                         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1664                                                                                 field->page->index);
1665                         for (l = forms_mapping; l; l = g_list_next (l)) {
1666                                 EvFormField *button = ((EvFormFieldMapping *)(l->data))->field;
1667                                 GdkRegion   *button_region;
1668
1669                                 if (button->id == field->id)
1670                                         continue;
1671
1672                                 /* FIXME: only buttons in the same group should be updated */
1673                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1674                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1675                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1676                                         continue;
1677
1678                                 button_region = ev_view_form_field_get_region (view, button);
1679                                 gdk_region_union (field_region, button_region);
1680                                 gdk_region_destroy (button_region);
1681                         }
1682
1683                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
1684                                                                        field, !state);
1685                         field_button->state = !state;
1686                 }
1687                         break;
1688         }
1689
1690         ev_view_reload_page (view, field->page->index, field_region);
1691         gdk_region_destroy (field_region);
1692
1693         return NULL;
1694 }
1695
1696 static void
1697 ev_view_form_field_text_save (EvView    *view,
1698                               GtkWidget *widget)
1699 {
1700         EvFormField *field;
1701
1702         if (!view->document)
1703                 return;
1704
1705         field = g_object_get_data (G_OBJECT (widget), "form-field");
1706
1707         if (field->changed) {
1708                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1709                 GdkRegion       *field_region;
1710
1711                 field_region = ev_view_form_field_get_region (view, field);
1712
1713                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
1714                                                             field, field_text->text);
1715                 field->changed = FALSE;
1716                 ev_view_reload_page (view, field->page->index, field_region);
1717                 gdk_region_destroy (field_region);
1718         }
1719 }
1720
1721 static void
1722 ev_view_form_field_text_changed (GtkWidget   *widget,
1723                                  EvFormField *field)
1724 {
1725         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1726         gchar           *text = NULL;
1727
1728         if (GTK_IS_ENTRY (widget)) {
1729                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
1730         } else if (GTK_IS_TEXT_BUFFER (widget)) {
1731                 GtkTextIter start, end;
1732
1733                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
1734                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
1735                                                  &start, &end, FALSE);
1736         }
1737
1738         if (!field_text->text ||
1739             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
1740                 g_free (field_text->text);
1741                 field_text->text = text;
1742                 field->changed = TRUE;
1743         }
1744 }
1745
1746 static GtkWidget *
1747 ev_view_form_field_text_create_widget (EvView      *view,
1748                                        EvFormField *field)
1749 {
1750         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1751         GtkWidget       *text = NULL;
1752         gchar           *txt;
1753
1754         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
1755                                                           field);
1756
1757         switch (field_text->type) {
1758                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
1759                         /* TODO */
1760                 case EV_FORM_FIELD_TEXT_NORMAL:
1761                         text = gtk_entry_new ();
1762                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
1763                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
1764                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
1765
1766                         if (txt) {
1767                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
1768                                 g_free (txt);
1769                         }
1770
1771                         g_signal_connect (text, "changed",
1772                                           G_CALLBACK (ev_view_form_field_text_changed),
1773                                           field);
1774                         g_signal_connect_after (text, "activate",
1775                                                 G_CALLBACK (ev_view_form_field_destroy),
1776                                                 view);
1777                         break;
1778                 case EV_FORM_FIELD_TEXT_MULTILINE: {
1779                         GtkTextBuffer *buffer;
1780
1781                         text = gtk_text_view_new ();
1782                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
1783
1784                         if (txt) {
1785                                 gtk_text_buffer_set_text (buffer, txt, -1);
1786                                 g_free (txt);
1787                         }
1788
1789                         g_signal_connect (buffer, "changed",
1790                                           G_CALLBACK (ev_view_form_field_text_changed),
1791                                           field);
1792                 }
1793                         break;
1794         }
1795
1796         g_object_weak_ref (G_OBJECT (text),
1797                            (GWeakNotify)ev_view_form_field_text_save,
1798                            view);
1799
1800         return text;
1801 }
1802
1803 static void
1804 ev_view_form_field_choice_save (EvView    *view,
1805                                 GtkWidget *widget)
1806 {
1807         EvFormField *field;
1808
1809         if (!view->document)
1810                 return;
1811
1812         field = g_object_get_data (G_OBJECT (widget), "form-field");
1813
1814         if (field->changed) {
1815                 GList             *l;
1816                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1817                 GdkRegion         *field_region;
1818
1819                 field_region = ev_view_form_field_get_region (view, field);
1820
1821                 if (field_choice->is_editable) {
1822                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
1823                                                                       field, field_choice->text);
1824                 } else {
1825                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
1826                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
1827                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
1828                                                                                  field,
1829                                                                                  GPOINTER_TO_INT (l->data));
1830                         }
1831                 }
1832                 field->changed = FALSE;
1833                 ev_view_reload_page (view, field->page->index, field_region);
1834                 gdk_region_destroy (field_region);
1835         }
1836 }
1837
1838 static void
1839 ev_view_form_field_choice_changed (GtkWidget   *widget,
1840                                    EvFormField *field)
1841 {
1842         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1843
1844         if (GTK_IS_COMBO_BOX (widget)) {
1845                 gint item;
1846
1847                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
1848                 if (!field_choice->selected_items ||
1849                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
1850                         g_list_free (field_choice->selected_items);
1851                         field_choice->selected_items = NULL;
1852                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1853                                                                        GINT_TO_POINTER (item));
1854                         field->changed = TRUE;
1855                 }
1856
1857                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
1858                         gchar *text;
1859
1860                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
1861                         if (!field_choice->text ||
1862                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
1863                                 g_free (field_choice->text);
1864                                 field_choice->text = text;
1865                                 field->changed = TRUE;
1866                         }
1867                 }
1868         } else if (GTK_IS_TREE_SELECTION (widget)) {
1869                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
1870                 GtkTreeModel     *model;
1871                 GList            *items, *l;
1872
1873                 items = gtk_tree_selection_get_selected_rows (selection, &model);
1874                 g_list_free (field_choice->selected_items);
1875                 field_choice->selected_items = NULL;
1876
1877                 for (l = items; l && l->data; l = g_list_next (l)) {
1878                         GtkTreeIter  iter;
1879                         GtkTreePath *path = (GtkTreePath *)l->data;
1880                         gint         item;
1881
1882                         gtk_tree_model_get_iter (model, &iter, path);
1883                         gtk_tree_model_get (model, &iter, 1, &item, -1);
1884
1885                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1886                                                                        GINT_TO_POINTER (item));
1887
1888                         gtk_tree_path_free (path);
1889                 }
1890
1891                 g_list_free (items);
1892
1893                 field->changed = TRUE;
1894         }
1895 }
1896
1897 static GtkWidget *
1898 ev_view_form_field_choice_create_widget (EvView      *view,
1899                                          EvFormField *field)
1900 {
1901         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1902         GtkWidget         *choice;
1903         GtkTreeModel      *model;
1904         gint               n_items, i;
1905         gint               selected_item = 0;
1906
1907         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
1908                                                                    field);
1909         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
1910         for (i = 0; i < n_items; i++) {
1911                 GtkTreeIter iter;
1912                 gchar      *item;
1913
1914                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
1915                                                                      field, i);
1916                 if (ev_document_forms_form_field_choice_is_item_selected (
1917                             EV_DOCUMENT_FORMS (view->document), field, i)) {
1918                         selected_item = i;
1919                         /* FIXME: we need a get_selected_items function in poppler */
1920                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1921                                                                        GINT_TO_POINTER (i));
1922                 }
1923
1924                 if (item) {
1925                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
1926                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
1927                                             0, item,
1928                                             1, i,
1929                                             -1);
1930                         g_free (item);
1931                 }
1932         }
1933
1934         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
1935                 GtkCellRenderer  *renderer;
1936                 GtkWidget        *tree_view;
1937                 GtkTreeSelection *selection;
1938
1939                 tree_view = gtk_tree_view_new_with_model (model);
1940                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
1941
1942                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
1943                 if (field_choice->multi_select) {
1944                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
1945                 }
1946
1947                 /* TODO: set selected items */
1948
1949                 renderer = gtk_cell_renderer_text_new ();
1950                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
1951                                                              0,
1952                                                              "choix", renderer,
1953                                                              "text", 0,
1954                                                              NULL);
1955
1956                 choice = gtk_scrolled_window_new (NULL, NULL);
1957                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
1958                                                 GTK_POLICY_AUTOMATIC,
1959                                                 GTK_POLICY_AUTOMATIC);
1960                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
1961                 gtk_widget_show (tree_view);
1962
1963                 g_signal_connect (selection, "changed",
1964                                   G_CALLBACK (ev_view_form_field_choice_changed),
1965                                   field);
1966                 g_signal_connect_after (selection, "changed",
1967                                         G_CALLBACK (ev_view_form_field_destroy),
1968                                         view);
1969         } else if (field_choice->is_editable) { /* ComboBoxEntry */
1970                 gchar *text;
1971
1972                 choice = gtk_combo_box_entry_new_with_model (model, 0);
1973                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
1974                 if (text) {
1975                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
1976                         g_free (text);
1977                 }
1978
1979                 g_signal_connect (choice, "changed",
1980                                   G_CALLBACK (ev_view_form_field_choice_changed),
1981                                   field);
1982                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
1983                                         G_CALLBACK (ev_view_form_field_destroy),
1984                                         view);
1985         } else { /* ComboBoxText */
1986                 GtkCellRenderer *renderer;
1987
1988                 choice = gtk_combo_box_new_with_model (model);
1989                 renderer = gtk_cell_renderer_text_new ();
1990                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
1991                                             renderer, TRUE);
1992                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
1993                                                 renderer,
1994                                                 "text", 0,
1995                                                 NULL);
1996                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
1997                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
1998
1999                 g_signal_connect (choice, "changed",
2000                                   G_CALLBACK (ev_view_form_field_choice_changed),
2001                                   field);
2002                 g_signal_connect_after (choice, "changed",
2003                                         G_CALLBACK (ev_view_form_field_destroy),
2004                                         view);
2005         }
2006
2007         g_object_unref (model);
2008
2009         g_object_weak_ref (G_OBJECT (choice),
2010                            (GWeakNotify)ev_view_form_field_choice_save,
2011                            view);
2012
2013         return choice;
2014 }
2015
2016 static void
2017 ev_view_handle_form_field (EvView      *view,
2018                            EvFormField *field,
2019                            gdouble      x,
2020                            gdouble      y)
2021 {
2022         GtkWidget   *field_widget = NULL;
2023         GList       *form_field_mapping;
2024         EvRectangle  field_area;
2025         GdkRectangle view_area;
2026
2027         if (field->is_read_only)
2028                 return;
2029
2030         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2031                 field_widget = ev_view_form_field_button_create_widget (view, field);
2032         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2033                 field_widget = ev_view_form_field_text_create_widget (view, field);
2034         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2035                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2036         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2037                 /* TODO */
2038         }
2039
2040         /* Form field doesn't require a widget */
2041         if (!field_widget)
2042                 return;
2043
2044         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2045                                 g_object_ref (field),
2046                                 (GDestroyNotify)g_object_unref);
2047
2048         form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, field->page->index);
2049         ev_form_field_mapping_get_area (form_field_mapping, field, &field_area);
2050
2051         doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
2052         view_area.x -= view->scroll_x;
2053         view_area.y -= view->scroll_y;
2054
2055         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2056         gtk_widget_show (field_widget);
2057         gtk_widget_grab_focus (field_widget);
2058 }
2059
2060 /*** GtkWidget implementation ***/
2061
2062 static void
2063 ev_view_size_request_continuous_dual_page (EvView         *view,
2064                                            GtkRequisition *requisition)
2065 {
2066         int max_width;
2067         gint n_pages;
2068         GtkBorder border;
2069
2070         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2071                                      view->scale, &max_width);
2072         compute_border (view, max_width, max_width, &border);
2073
2074         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
2075
2076         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2077         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
2078
2079         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2080                 requisition->width = 1;
2081         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2082                 requisition->width = 1;
2083                 /* FIXME: This could actually be set on one page docs or docs
2084                  * with a strange aspect ratio. */
2085                 /* requisition->height = 1;*/
2086         }
2087 }
2088
2089 static void
2090 ev_view_size_request_continuous (EvView         *view,
2091                                  GtkRequisition *requisition)
2092 {
2093         int max_width;
2094         int n_pages;
2095         GtkBorder border;
2096
2097
2098         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2099                                      view->scale, &max_width);
2100         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2101         compute_border (view, max_width, max_width, &border);
2102
2103         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2104         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
2105
2106         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2107                 requisition->width = 1;
2108         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2109                 requisition->width = 1;
2110                 /* FIXME: This could actually be set on one page docs or docs
2111                  * with a strange aspect ratio. */
2112                 /* requisition->height = 1;*/
2113         }
2114 }
2115
2116 static void
2117 ev_view_size_request_dual_page (EvView         *view,
2118                                 GtkRequisition *requisition)
2119 {
2120         GtkBorder border;
2121         gint width, height;
2122
2123         /* Find the largest of the two. */
2124         ev_page_cache_get_size (view->page_cache,
2125                                 view->current_page,
2126                                 view->rotation,
2127                                 view->scale,
2128                                 &width, &height);
2129         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
2130                 gint width_2, height_2;
2131                 ev_page_cache_get_size (view->page_cache,
2132                                         view->current_page + 1,
2133                                         view->rotation,
2134                                         view->scale,
2135                                         &width_2, &height_2);
2136                 if (width_2 > width) {
2137                         width = width_2;
2138                         height = height_2;
2139                 }
2140         }
2141         compute_border (view, width, height, &border);
2142
2143         requisition->width = ((width + border.left + border.right) * 2) +
2144                 (view->spacing * 3);
2145         requisition->height = (height + border.top + border.bottom) +
2146                 (view->spacing * 2);
2147
2148         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2149                 requisition->width = 1;
2150         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2151                 requisition->width = 1;
2152                 requisition->height = 1;
2153         }
2154 }
2155
2156 static void
2157 ev_view_size_request_single_page (EvView         *view,
2158                                   GtkRequisition *requisition)
2159 {
2160         GtkBorder border;
2161         gint width, height;
2162
2163         ev_page_cache_get_size (view->page_cache,
2164                                 view->current_page,
2165                                 view->rotation,
2166                                 view->scale,
2167                                 &width, &height);
2168         compute_border (view, width, height, &border);
2169
2170         requisition->width = width + border.left + border.right + (2 * view->spacing);
2171         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2172
2173         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2174                 requisition->width = 1;
2175                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2176         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2177                 requisition->width = 1;
2178                 requisition->height = 1;
2179         }
2180 }
2181
2182 static void
2183 ev_view_size_request (GtkWidget      *widget,
2184                       GtkRequisition *requisition)
2185 {
2186         EvView *view = EV_VIEW (widget);
2187
2188         if (view->document == NULL) {
2189                 requisition->width = 1;
2190                 requisition->height = 1;
2191                 return;
2192         }
2193
2194         if (view->presentation) {
2195                 requisition->width = 1;
2196                 requisition->height = 1;
2197                 return;
2198         }
2199
2200         if (view->continuous && view->dual_page)
2201                 ev_view_size_request_continuous_dual_page (view, requisition);
2202         else if (view->continuous)
2203                 ev_view_size_request_continuous (view, requisition);
2204         else if (view->dual_page)
2205                 ev_view_size_request_dual_page (view, requisition);
2206         else
2207                 ev_view_size_request_single_page (view, requisition);
2208 }
2209
2210 static void
2211 ev_view_size_allocate (GtkWidget      *widget,
2212                        GtkAllocation  *allocation)
2213 {
2214         EvView *view = EV_VIEW (widget);
2215         GList  *children, *l;
2216
2217         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2218
2219         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2220             view->sizing_mode == EV_SIZING_BEST_FIT) {
2221
2222                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
2223
2224                 ev_view_size_request (widget, &widget->requisition);
2225         }
2226
2227         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2228         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2229
2230         if (view->document)
2231                 view_update_range_and_current_page (view);
2232
2233         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2234         view->pending_resize = FALSE;
2235
2236         children = gtk_container_get_children (GTK_CONTAINER (widget));
2237         for (l = children; l && l->data; l = g_list_next (l)) {
2238                 EvFormField   *field;
2239                 EvRectangle    field_area;
2240                 GdkRectangle   view_area;
2241                 GList         *form_field_mapping;
2242                 GtkAllocation  child_allocation;
2243                 GtkRequisition child_requisition;
2244                 GtkWidget     *child = (GtkWidget *)l->data;
2245
2246                 field = g_object_get_data (G_OBJECT (child), "form-field");
2247                 if (!field)
2248                         continue;
2249
2250                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2251                                                                              field->page->index);
2252                 ev_form_field_mapping_get_area (form_field_mapping, field, &field_area);
2253
2254                 doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
2255                 view_area.x -= view->scroll_x;
2256                 view_area.y -= view->scroll_y;
2257
2258                 gtk_widget_size_request (child, &child_requisition);
2259                 if (child_requisition.width != view_area.width ||
2260                     child_requisition.height != view_area.height)
2261                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2262
2263                 gtk_container_child_get (GTK_CONTAINER (widget),
2264                                          child,
2265                                          "x", &child_allocation.x,
2266                                          "y", &child_allocation.y,
2267                                          NULL);
2268                 if (child_allocation.x != view_area.x ||
2269                     child_allocation.y != view_area.y) {
2270                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2271                 }
2272         }
2273         g_list_free (children);
2274 }
2275
2276 static void
2277 ev_view_realize (GtkWidget *widget)
2278 {
2279         EvView *view = EV_VIEW (widget);
2280
2281         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
2282                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
2283
2284         gdk_window_set_events (view->layout.bin_window,
2285                                (gdk_window_get_events (view->layout.bin_window) |
2286                                 GDK_EXPOSURE_MASK |
2287                                 GDK_BUTTON_PRESS_MASK |
2288                                 GDK_BUTTON_RELEASE_MASK |
2289                                 GDK_SCROLL_MASK |
2290                                 GDK_KEY_PRESS_MASK |
2291                                 GDK_POINTER_MOTION_MASK |
2292                                 GDK_POINTER_MOTION_HINT_MASK |
2293                                 GDK_ENTER_NOTIFY_MASK |
2294                                 GDK_LEAVE_NOTIFY_MASK));
2295
2296         if (view->presentation)
2297                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
2298         else
2299                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
2300 }
2301
2302 static gboolean
2303 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
2304 {
2305         EvView *view = EV_VIEW (widget);
2306         guint state;
2307
2308         state = event->state & gtk_accelerator_get_default_mod_mask ();
2309
2310         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
2311                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
2312
2313                 if (event->direction == GDK_SCROLL_UP ||
2314                     event->direction == GDK_SCROLL_LEFT) {
2315                         if (ev_view_can_zoom_in (view)) {
2316                                 ev_view_zoom_in (view);
2317                         }
2318                 } else {
2319                         if (ev_view_can_zoom_out (view)) {
2320                                 ev_view_zoom_out (view);
2321                         }
2322                 }
2323
2324                 return TRUE;
2325         }
2326
2327         view->jump_to_find_result = FALSE;
2328
2329         /* Shift+Wheel scrolls the in the perpendicular direction */
2330         if (state & GDK_SHIFT_MASK) {
2331                 if (event->direction == GDK_SCROLL_UP)
2332                         event->direction = GDK_SCROLL_LEFT;
2333                 else if (event->direction == GDK_SCROLL_LEFT)
2334                         event->direction = GDK_SCROLL_UP;
2335                 else if (event->direction == GDK_SCROLL_DOWN)
2336                         event->direction = GDK_SCROLL_RIGHT;
2337                 else if (event->direction == GDK_SCROLL_RIGHT)
2338                         event->direction = GDK_SCROLL_DOWN;
2339
2340                 event->state &= ~GDK_SHIFT_MASK;
2341                 state &= ~GDK_SHIFT_MASK;
2342         }
2343
2344         if (state == 0 && view->presentation) {
2345                 switch (event->direction) {
2346                         case GDK_SCROLL_DOWN:
2347                         case GDK_SCROLL_RIGHT:
2348                                 ev_view_next_page (view);
2349                                 break;
2350                         case GDK_SCROLL_UP:
2351                         case GDK_SCROLL_LEFT:
2352                                 ev_view_previous_page (view);
2353                                 break;
2354                 }
2355
2356                 return TRUE;
2357         }
2358
2359         return FALSE;
2360 }
2361
2362 static EvViewSelection *
2363 find_selection_for_page (EvView *view,
2364                          gint    page)
2365 {
2366         GList *list;
2367
2368         for (list = view->selection_info.selections; list != NULL; list = list->next) {
2369                 EvViewSelection *selection;
2370
2371                 selection = (EvViewSelection *) list->data;
2372
2373                 if (selection->page == page)
2374                         return selection;
2375         }
2376
2377         return NULL;
2378 }
2379
2380 static void
2381 draw_end_presentation_page (EvView       *view,
2382                             GdkRectangle *page_area)
2383 {
2384         PangoLayout *layout;
2385         PangoFontDescription *font_desc;
2386         gchar *markup;
2387         const gchar *text = _("End of presentation. Press Escape to exit.");
2388
2389         if (view->presentation_state != EV_PRESENTATION_END)
2390                 return;
2391
2392         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
2393         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
2394         pango_layout_set_markup (layout, markup, -1);
2395         g_free (markup);
2396
2397         font_desc = pango_font_description_new ();
2398         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
2399         pango_layout_set_font_description (layout, font_desc);
2400
2401         gtk_paint_layout (GTK_WIDGET (view)->style,
2402                           view->layout.bin_window,
2403                           GTK_WIDGET_STATE (view),
2404                           FALSE,
2405                           page_area,
2406                           GTK_WIDGET (view),
2407                           NULL,
2408                           page_area->x + 15,
2409                           page_area->y + 15,
2410                           layout);
2411
2412         pango_font_description_free (font_desc);
2413         g_object_unref (layout);
2414 }
2415
2416 static gboolean
2417 ev_view_expose_event (GtkWidget      *widget,
2418                       GdkEventExpose *event)
2419 {
2420         EvView  *view = EV_VIEW (widget);
2421         cairo_t *cr;
2422         gint     i;
2423
2424         if (view->animation) {
2425                 if (ev_transition_animation_ready (view->animation)) {
2426                         GdkRectangle page_area;
2427                         GtkBorder    border;
2428
2429                         if (get_page_extents (view, view->current_page, &page_area, &border)) {
2430                                 cr = gdk_cairo_create (view->layout.bin_window);
2431
2432                                 /* normalize to x=0, y=0 */
2433                                 cairo_translate (cr, page_area.x, page_area.y);
2434                                 page_area.x = page_area.y = 0;
2435
2436                                 ev_transition_animation_paint (view->animation, cr, page_area);
2437                                 cairo_destroy (cr);
2438                         }
2439                 }
2440
2441                 return TRUE;
2442         }
2443
2444         if (view->presentation) {
2445                 switch (view->presentation_state) {
2446                         case EV_PRESENTATION_END: {
2447                                 GdkRectangle area = {0};
2448
2449                                 area.width = widget->allocation.width;
2450                                 area.height = widget->allocation.height;
2451
2452                                 draw_end_presentation_page (view, &area);
2453                         }
2454                                 return FALSE;
2455                         case EV_PRESENTATION_BLACK:
2456                         case EV_PRESENTATION_WHITE:
2457                                 return FALSE;
2458                         case EV_PRESENTATION_NORMAL:
2459                         default:
2460                                 break;
2461                 }
2462         } else if (view->loading) {
2463                 GdkRectangle area = {0};
2464
2465                 area.width = widget->allocation.width;
2466                 area.height = widget->allocation.height;
2467
2468                 draw_loading_text (view,
2469                                    &area,
2470                                    &(event->area));
2471         }
2472
2473         if (view->document == NULL)
2474                 return FALSE;
2475
2476         cr = gdk_cairo_create (view->layout.bin_window);
2477
2478         for (i = view->start_page; i <= view->end_page; i++) {
2479                 GdkRectangle page_area;
2480                 GtkBorder border;
2481                 gboolean page_ready = TRUE;
2482
2483                 if (!get_page_extents (view, i, &page_area, &border))
2484                         continue;
2485
2486                 page_area.x -= view->scroll_x;
2487                 page_area.y -= view->scroll_y;
2488
2489                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
2490
2491                 if (page_ready && view->find_pages && view->highlight_find_results)
2492                         highlight_find_results (view, i);
2493         }
2494
2495         cairo_destroy (cr);
2496
2497         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
2498                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
2499
2500         return FALSE;
2501 }
2502
2503 static gboolean
2504 ev_view_do_popup_menu (EvView *view,
2505                        gdouble x,
2506                        gdouble y)
2507 {
2508         EvLink  *link;
2509         EvImage *image;
2510
2511         image = ev_view_get_image_at_location (view, x, y);
2512         if (image) {
2513                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
2514                 return TRUE;
2515         }
2516
2517         link = ev_view_get_link_at_location (view, x, y);
2518         if (link) {
2519                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
2520                 return TRUE;
2521         }
2522
2523         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
2524
2525         return TRUE;
2526 }
2527
2528 static gboolean
2529 ev_view_popup_menu (GtkWidget *widget)
2530 {
2531         gint x, y;
2532
2533         gtk_widget_get_pointer (widget, &x, &y);
2534         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
2535 }
2536
2537 static void
2538 get_link_area (EvView       *view,
2539                gint          x,
2540                gint          y,
2541                EvLink       *link,
2542                GdkRectangle *area)
2543 {
2544         EvRectangle  ev_rect;
2545         GList       *link_mapping;
2546         gint         page;
2547         gint         x_offset = 0, y_offset = 0;
2548
2549         x += view->scroll_x;
2550         y += view->scroll_y;
2551
2552         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
2553
2554         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
2555         ev_link_mapping_get_area (link_mapping, link, &ev_rect);
2556
2557         doc_rect_to_view_rect (view, page, &ev_rect, area);
2558         area->y -= view->scroll_y ;
2559 }
2560
2561 static gboolean
2562 ev_view_query_tooltip (GtkWidget         *widget,
2563                        gint               x,
2564                        gint               y,
2565                        gboolean           keyboard_tip,
2566                        GtkTooltip        *tooltip)
2567 {
2568         EvView *view = EV_VIEW (widget);
2569         EvLink *link;
2570         gchar  *text;
2571
2572         link = ev_view_get_link_at_location (view, x, y);
2573         if (!link)
2574                 return FALSE;
2575
2576         text = tip_from_link (view, link);
2577         if (text && g_utf8_validate (text, -1, NULL)) {
2578                 GdkRectangle link_area;
2579
2580                 get_link_area (view, x, y, link, &link_area);
2581                 gtk_tooltip_set_text (tooltip, text);
2582                 gtk_tooltip_set_tip_area (tooltip, &link_area);
2583         }
2584         g_free (text);
2585
2586         return TRUE;
2587 }
2588
2589 static void
2590 start_selection_for_event (EvView         *view,
2591                            GdkEventButton *event)
2592 {
2593         EvSelectionStyle style;
2594
2595         clear_selection (view);
2596
2597         view->selection_info.start.x = event->x + view->scroll_x;
2598         view->selection_info.start.y = event->y + view->scroll_y;
2599
2600         switch (event->type) {
2601                 case GDK_2BUTTON_PRESS:
2602                         style = EV_SELECTION_STYLE_WORD;
2603                         break;
2604                 case GDK_3BUTTON_PRESS:
2605                         style = EV_SELECTION_STYLE_LINE;
2606                         break;
2607                 default:
2608                         style = EV_SELECTION_STYLE_GLYPH;
2609                         break;
2610         }
2611
2612         view->selection_info.style = style;
2613 }
2614
2615 static gboolean
2616 ev_view_button_press_event (GtkWidget      *widget,
2617                             GdkEventButton *event)
2618 {
2619         EvView *view = EV_VIEW (widget);
2620
2621         if (!view->document)
2622                 return FALSE;
2623
2624         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
2625                 gtk_widget_grab_focus (widget);
2626         }
2627
2628         view->pressed_button = event->button;
2629         view->selection_info.in_drag = FALSE;
2630
2631         if (view->scroll_info.autoscrolling)
2632                 return TRUE;
2633
2634         switch (event->button) {
2635                 case 1: {
2636                         EvImage *image;
2637                         EvFormField *field;
2638
2639                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
2640                                 if (event->type == GDK_3BUTTON_PRESS) {
2641                                         start_selection_for_event (view, event);
2642                                 } else if (location_in_selected_text (view,
2643                                                                event->x + view->scroll_x,
2644                                                                event->y + view->scroll_y)) {
2645                                         view->selection_info.in_drag = TRUE;
2646                                 } else {
2647                                         start_selection_for_event (view, event);
2648                                 }
2649
2650                                 gtk_widget_queue_draw (widget);
2651                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
2652                                 ev_view_remove_all (view);
2653                                 ev_view_handle_form_field (view, field, event->x, event->y);
2654                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
2655                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
2656                                 if (view->image_dnd_info.image)
2657                                         g_object_unref (view->image_dnd_info.image);
2658                                 view->image_dnd_info.image = g_object_ref (image);
2659                                 view->image_dnd_info.in_drag = TRUE;
2660
2661                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
2662                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
2663                         } else {
2664                                 ev_view_remove_all (view);
2665
2666                                 if (EV_IS_SELECTION (view->document))
2667                                         start_selection_for_event (view, event);
2668                         }
2669                 }
2670                         return TRUE;
2671                 case 2:
2672                         /* use root coordinates as reference point because
2673                          * scrolling changes window relative coordinates */
2674                         view->drag_info.start.x = event->x_root;
2675                         view->drag_info.start.y = event->y_root;
2676                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
2677                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
2678
2679                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
2680
2681                         return TRUE;
2682                 case 3:
2683                         view->scroll_info.start_y = event->y;
2684                         return ev_view_do_popup_menu (view, event->x, event->y);
2685         }
2686
2687         return FALSE;
2688 }
2689
2690 static void
2691 ev_view_remove_all (EvView *view)
2692 {
2693         GList *children, *child;
2694
2695         children = gtk_container_get_children (GTK_CONTAINER (view));
2696         for (child = children; child && child->data; child = g_list_next (child)) {
2697                 gtk_container_remove (GTK_CONTAINER (view),
2698                                       GTK_WIDGET (child->data));
2699         }
2700         g_list_free (children);
2701 }
2702
2703 /*** Drag and Drop ***/
2704 static void
2705 ev_view_drag_data_get (GtkWidget        *widget,
2706                        GdkDragContext   *context,
2707                        GtkSelectionData *selection_data,
2708                        guint             info,
2709                        guint             time)
2710 {
2711         EvView *view = EV_VIEW (widget);
2712
2713         switch (info) {
2714                 case TARGET_DND_TEXT:
2715                         if (EV_IS_SELECTION (view->document) &&
2716                             view->selection_info.selections) {
2717                                 gchar *text;
2718
2719                                 text = get_selected_text (view);
2720                                 gtk_selection_data_set_text (selection_data,
2721                                                              text,
2722                                                              strlen (text));
2723                                 g_free (text);
2724                         }
2725                         break;
2726                 case TARGET_DND_IMAGE:
2727                         if (view->image_dnd_info.image) {
2728                                 GdkPixbuf *pixbuf;
2729
2730                                 ev_document_doc_mutex_lock ();
2731                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
2732                                                                        view->image_dnd_info.image);
2733                                 ev_document_doc_mutex_unlock ();
2734
2735                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
2736                                 g_object_unref (pixbuf);
2737                         }
2738                         break;
2739                 case TARGET_DND_URI:
2740                         if (view->image_dnd_info.image) {
2741                                 GdkPixbuf   *pixbuf;
2742                                 const gchar *tmp_uri;
2743                                 gchar       *uris[2];
2744
2745                                 ev_document_doc_mutex_lock ();
2746                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
2747                                                                        view->image_dnd_info.image);
2748                                 ev_document_doc_mutex_unlock ();
2749
2750                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
2751                                 g_object_unref (pixbuf);
2752
2753                                 uris[0] = (gchar *)tmp_uri;
2754                                 uris[1] = NULL;
2755                                 gtk_selection_data_set_uris (selection_data, uris);
2756                         }
2757         }
2758 }
2759
2760 static gboolean
2761 ev_view_drag_motion (GtkWidget      *widget,
2762                      GdkDragContext *context,
2763                      gint            x,
2764                      gint            y,
2765                      guint           time)
2766 {
2767         if (gtk_drag_get_source_widget (context) == widget)
2768                 gdk_drag_status (context, 0, time);
2769         else
2770                 gdk_drag_status (context, context->suggested_action, time);
2771
2772         return TRUE;
2773 }
2774
2775 static gboolean
2776 selection_update_idle_cb (EvView *view)
2777 {
2778         compute_selections (view,
2779                             view->selection_info.style,
2780                             &view->selection_info.start,
2781                             &view->motion);
2782         view->selection_update_id = 0;
2783         return FALSE;
2784 }
2785
2786 static gboolean
2787 selection_scroll_timeout_cb (EvView *view)
2788 {
2789         gint x, y, shift = 0;
2790         GtkWidget *widget = GTK_WIDGET (view);
2791
2792         gtk_widget_get_pointer (widget, &x, &y);
2793
2794         if (y > widget->allocation.height) {
2795                 shift = (y - widget->allocation.height) / 2;
2796         } else if (y < 0) {
2797                 shift = y / 2;
2798         }
2799
2800         if (shift)
2801                 gtk_adjustment_set_value (view->vadjustment,
2802                                           CLAMP (view->vadjustment->value + shift,
2803                                           view->vadjustment->lower,
2804                                           view->vadjustment->upper -
2805                                           view->vadjustment->page_size));
2806
2807         if (x > widget->allocation.width) {
2808                 shift = (x - widget->allocation.width) / 2;
2809         } else if (x < 0) {
2810                 shift = x / 2;
2811         }
2812
2813         if (shift)
2814                 gtk_adjustment_set_value (view->hadjustment,
2815                                           CLAMP (view->hadjustment->value + shift,
2816                                           view->hadjustment->lower,
2817                                           view->hadjustment->upper -
2818                                           view->hadjustment->page_size));
2819
2820         return TRUE;
2821 }
2822
2823 static gboolean
2824 ev_view_drag_update_momentum (EvView *view)
2825 {
2826         int i;
2827         if (!view->drag_info.in_drag)
2828                 return FALSE;
2829
2830         for (i = DRAG_HISTORY - 1; i > 0; i--) {
2831                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
2832                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
2833         }
2834
2835         /* Momentum is a moving average of 10ms granularity over
2836          * the last 100ms with each 10ms stored in buffer.
2837          */
2838
2839         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
2840         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
2841
2842         return TRUE;
2843 }
2844
2845 static gboolean
2846 ev_view_scroll_drag_release (EvView *view)
2847 {
2848         gdouble dhadj_value, dvadj_value;
2849         gdouble oldhadjustment, oldvadjustment;
2850
2851         view->drag_info.momentum.x /= 1.2;
2852         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
2853
2854         dhadj_value = view->hadjustment->page_size *
2855                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
2856         dvadj_value = view->vadjustment->page_size *
2857                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
2858
2859         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
2860         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
2861
2862         if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
2863            ((oldhadjustment + dhadj_value) < 0))
2864                 view->drag_info.momentum.x *= -0.5; /* 0.5 rather than 1 means the edges absorb some momentum */
2865         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
2866            ((oldvadjustment + dvadj_value) < 0))
2867                 view->drag_info.momentum.y *= -0.5;
2868
2869         gtk_adjustment_set_value (view->hadjustment,
2870                                 MIN (oldhadjustment + dhadj_value,
2871                                 view->hadjustment->upper - view->hadjustment->page_size));
2872         gtk_adjustment_set_value (view->vadjustment,
2873                                 MIN (oldvadjustment + dvadj_value,
2874                                 view->vadjustment->upper - view->vadjustment->page_size));
2875
2876         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
2877            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
2878                 return FALSE;
2879         else
2880                 return TRUE;
2881 }
2882
2883 static gboolean
2884 ev_view_motion_notify_event (GtkWidget      *widget,
2885                              GdkEventMotion *event)
2886 {
2887         EvView *view = EV_VIEW (widget);
2888         gint x, y;
2889
2890         if (!view->document)
2891                 return FALSE;
2892
2893
2894         if (event->is_hint || event->window != view->layout.bin_window) {
2895             gtk_widget_get_pointer (widget, &x, &y);
2896         } else {
2897             x = event->x;
2898             y = event->y;
2899         }
2900
2901         if (view->scroll_info.autoscrolling) {
2902                 view->scroll_info.last_y = y;
2903                 return TRUE;
2904         }
2905
2906         if (view->selection_info.in_drag) {
2907                 if (gtk_drag_check_threshold (widget,
2908                                               view->selection_info.start.x,
2909                                               view->selection_info.start.y,
2910                                               x, y)) {
2911                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
2912
2913                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
2914
2915                         gtk_drag_begin (widget, target_list,
2916                                         GDK_ACTION_COPY,
2917                                         1, (GdkEvent *)event);
2918
2919                         view->selection_info.in_drag = FALSE;
2920
2921                         gtk_target_list_unref (target_list);
2922
2923                         return TRUE;
2924                 }
2925         } else if (view->image_dnd_info.in_drag) {
2926                 if (gtk_drag_check_threshold (widget,
2927                                               view->selection_info.start.x,
2928                                               view->selection_info.start.y,
2929                                               x, y)) {
2930                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
2931
2932                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
2933                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
2934
2935                         gtk_drag_begin (widget, target_list,
2936                                         GDK_ACTION_COPY,
2937                                         1, (GdkEvent *)event);
2938
2939                         view->image_dnd_info.in_drag = FALSE;
2940
2941                         gtk_target_list_unref (target_list);
2942
2943                         return TRUE;
2944                 }
2945         }
2946
2947         switch (view->pressed_button) {
2948         case 1:
2949                 /* For the Evince 0.4.x release, we limit selection to un-rotated
2950                  * documents only.
2951                  */
2952                 if (view->rotation != 0)
2953                         return FALSE;
2954
2955                 /* Schedule timeout to scroll during selection and additionally
2956                  * scroll once to allow arbitrary speed. */
2957                 if (!view->selection_scroll_id)
2958                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
2959                                                                (GSourceFunc)selection_scroll_timeout_cb,
2960                                                                view);
2961                 else
2962                     selection_scroll_timeout_cb (view);
2963
2964                 view->selection_info.in_selection = TRUE;
2965                 view->motion.x = x + view->scroll_x;
2966                 view->motion.y = y + view->scroll_y;
2967
2968                 /* Queue an idle to handle the motion.  We do this because
2969                  * handling any selection events in the motion could be slower
2970                  * than new motion events reach us.  We always put it in the
2971                  * idle to make sure we catch up and don't visibly lag the
2972                  * mouse. */
2973                 if (!view->selection_update_id)
2974                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
2975
2976                 return TRUE;
2977         case 2:
2978                 if (!view->drag_info.in_drag) {
2979                         gboolean start;
2980                         int i;
2981
2982                         start = gtk_drag_check_threshold (widget,
2983                                                           view->drag_info.start.x,
2984                                                           view->drag_info.start.y,
2985                                                           event->x_root,
2986                                                           event->y_root);
2987                         view->drag_info.in_drag = start;
2988                         view->drag_info.drag_timeout_id = g_timeout_add (10,
2989                                 (GSourceFunc)ev_view_drag_update_momentum, view);
2990                         /* Set 100 to choose how long it takes to build up momentum */
2991                         /* Clear out previous momentum info: */
2992                         for (i = 0; i < DRAG_HISTORY; i++) {
2993                                 view->drag_info.buffer[i].x = event->x;
2994                                 view->drag_info.buffer[i].y = event->y;
2995                         }
2996                         view->drag_info.momentum.x = 0;
2997                         view->drag_info.momentum.y = 0;
2998                 }
2999
3000                 if (view->drag_info.in_drag) {
3001                         int dx, dy;
3002                         gdouble dhadj_value, dvadj_value;
3003
3004                         view->drag_info.buffer[0].x = event->x;
3005                         view->drag_info.buffer[0].y = event->y;
3006
3007                         dx = event->x_root - view->drag_info.start.x;
3008                         dy = event->y_root - view->drag_info.start.y;
3009
3010                         dhadj_value = view->hadjustment->page_size *
3011                                       (gdouble)dx / widget->allocation.width;
3012                         dvadj_value = view->vadjustment->page_size *
3013                                       (gdouble)dy / widget->allocation.height;
3014
3015                         /* clamp scrolling to visible area */
3016                         gtk_adjustment_set_value (view->hadjustment,
3017                                                   MIN(view->drag_info.hadj - dhadj_value,
3018                                                       view->hadjustment->upper -
3019                                                       view->hadjustment->page_size));
3020                         gtk_adjustment_set_value (view->vadjustment,
3021                                                   MIN(view->drag_info.vadj - dvadj_value,
3022                                                       view->vadjustment->upper -
3023                                                       view->vadjustment->page_size));
3024
3025                         return TRUE;
3026                 }
3027
3028                 break;
3029         default:
3030                 ev_view_handle_cursor_over_xy (view, x, y);
3031         }
3032
3033         return FALSE;
3034 }
3035
3036 static gboolean
3037 ev_view_button_release_event (GtkWidget      *widget,
3038                               GdkEventButton *event)
3039 {
3040         EvView *view = EV_VIEW (widget);
3041         EvLink *link = NULL;
3042
3043         view->image_dnd_info.in_drag = FALSE;
3044
3045         if (view->scroll_info.autoscrolling) {
3046                 ev_view_autoscroll_stop (view);
3047                 view->pressed_button = -1;
3048
3049                 return TRUE;
3050         }
3051
3052         if (view->drag_info.in_drag) {
3053                 view->drag_info.release_timeout_id =
3054                         g_timeout_add (20,
3055                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3056         }
3057
3058         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3059                 link = ev_view_get_link_at_location (view, event->x, event->y);
3060         }
3061
3062         view->drag_info.in_drag = FALSE;
3063
3064         if (view->pressed_button == 2) {
3065                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3066         }
3067
3068         view->pressed_button = -1;
3069
3070         if (view->selection_scroll_id) {
3071             g_source_remove (view->selection_scroll_id);
3072             view->selection_scroll_id = 0;
3073         }
3074         if (view->selection_update_id) {
3075             g_source_remove (view->selection_update_id);
3076             view->selection_update_id = 0;
3077         }
3078
3079         if (!view->selection_info.in_selection &&
3080             view->selection_info.style != EV_SELECTION_STYLE_GLYPH) {
3081                 compute_selections (view,
3082                                     view->selection_info.style,
3083                                     &(view->selection_info.start),
3084                                     &(view->selection_info.start));
3085         }
3086
3087         if (view->selection_info.selections) {
3088                 clear_link_selected (view);
3089                 ev_view_update_primary_selection (view);
3090
3091                 if (view->selection_info.in_drag) {
3092                         clear_selection (view);
3093                         gtk_widget_queue_draw (widget);
3094                 }
3095
3096                 view->selection_info.in_drag = FALSE;
3097         } else if (link) {
3098                 if (event->button == 2) {
3099                         EvLinkAction    *action;
3100                         EvLinkActionType type;
3101
3102                         action = ev_link_get_action (link);
3103                         if (!action)
3104                                 return FALSE;
3105
3106                         type = ev_link_action_get_action_type (action);
3107                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3108                                 g_signal_emit (view,
3109                                                signals[SIGNAL_EXTERNAL_LINK],
3110                                                0, action);
3111                         }
3112                 } else {
3113                         ev_view_handle_link (view, link);
3114                 }
3115         } else if (view->presentation) {
3116                 switch (event->button) {
3117                         case 1:
3118                                 ev_view_next_page (view);
3119                                 return TRUE;
3120                         case 3:
3121                                 ev_view_previous_page (view);
3122                                 return TRUE;
3123                 }
3124         }
3125
3126         return FALSE;
3127 }
3128
3129 /* Goto Window */
3130 /* Cut and paste from gtkwindow.c */
3131 static void
3132 send_focus_change (GtkWidget *widget,
3133                    gboolean   in)
3134 {
3135         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3136
3137         g_object_ref (widget);
3138
3139         if (in)
3140                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3141         else
3142                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3143
3144         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3145         fevent->focus_change.window = g_object_ref (widget->window);
3146         fevent->focus_change.in = in;
3147
3148         gtk_widget_event (widget, fevent);
3149
3150         g_object_notify (G_OBJECT (widget), "has-focus");
3151
3152         g_object_unref (widget);
3153         gdk_event_free (fevent);
3154 }
3155
3156 static void
3157 ev_view_goto_window_hide (EvView *view)
3158 {
3159         /* send focus-in event */
3160         send_focus_change (view->goto_entry, FALSE);
3161         gtk_widget_hide (view->goto_window);
3162         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3163 }
3164
3165 static gboolean
3166 ev_view_goto_window_delete_event (GtkWidget   *widget,
3167                                   GdkEventAny *event,
3168                                   EvView      *view)
3169 {
3170         ev_view_goto_window_hide (view);
3171
3172         return TRUE;
3173 }
3174
3175 static gboolean
3176 key_is_numeric (guint keyval)
3177 {
3178         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3179                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3180 }
3181
3182 static gboolean
3183 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3184                                      GdkEventKey *event,
3185                                      EvView      *view)
3186 {
3187         switch (event->keyval) {
3188                 case GDK_Escape:
3189                 case GDK_Tab:
3190                 case GDK_KP_Tab:
3191                 case GDK_ISO_Left_Tab:
3192                         ev_view_goto_window_hide (view);
3193                         return TRUE;
3194                 case GDK_Return:
3195                 case GDK_KP_Enter:
3196                 case GDK_ISO_Enter:
3197                 case GDK_BackSpace:
3198                 case GDK_Delete:
3199                         return FALSE;
3200                 default:
3201                         if (!key_is_numeric (event->keyval))
3202                                 return TRUE;
3203         }
3204
3205         return FALSE;
3206 }
3207
3208 static gboolean
3209 ev_view_goto_window_button_press_event (GtkWidget      *widget,
3210                                         GdkEventButton *event,
3211                                         EvView         *view)
3212 {
3213         ev_view_goto_window_hide (view);
3214
3215         return TRUE;
3216 }
3217
3218 static void
3219 ev_view_goto_entry_activate (GtkEntry *entry,
3220                              EvView   *view)
3221 {
3222         const gchar *text;
3223         gint         page;
3224
3225         text = gtk_entry_get_text (entry);
3226         page = atoi (text) - 1;
3227
3228         ev_view_goto_window_hide (view);
3229
3230         if (page >= 0 &&
3231             page < ev_page_cache_get_n_pages (view->page_cache))
3232                 ev_page_cache_set_current_page (view->page_cache, page);
3233 }
3234
3235 static void
3236 ev_view_goto_window_create (EvView *view)
3237 {
3238         GtkWidget *frame, *hbox, *toplevel, *label;
3239
3240         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
3241
3242         if (view->goto_window) {
3243                 if (GTK_WINDOW (toplevel)->group)
3244                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3245                                                      GTK_WINDOW (view->goto_window));
3246                 else if (GTK_WINDOW (view->goto_window)->group)
3247                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
3248                                                         GTK_WINDOW (view->goto_window));
3249                 return;
3250         }
3251
3252         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
3253         gtk_window_set_screen (GTK_WINDOW (view->goto_window),
3254                                gtk_widget_get_screen (GTK_WIDGET (view)));
3255
3256         if (GTK_WINDOW (toplevel)->group)
3257                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3258                                              GTK_WINDOW (view->goto_window));
3259
3260         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
3261
3262         g_signal_connect (view->goto_window, "delete_event",
3263                           G_CALLBACK (ev_view_goto_window_delete_event),
3264                           view);
3265         g_signal_connect (view->goto_window, "key_press_event",
3266                           G_CALLBACK (ev_view_goto_window_key_press_event),
3267                           view);
3268         g_signal_connect (view->goto_window, "button_press_event",
3269                           G_CALLBACK (ev_view_goto_window_button_press_event),
3270                           view);
3271
3272         frame = gtk_frame_new (NULL);
3273         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
3274         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
3275         gtk_widget_show (frame);
3276
3277         hbox = gtk_hbox_new (FALSE, 0);
3278         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
3279         gtk_container_add (GTK_CONTAINER (frame), hbox);
3280         gtk_widget_show (hbox);
3281
3282         label = gtk_label_new(_("Jump to page:"));
3283         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
3284         gtk_widget_show (label);
3285         gtk_widget_realize (label);
3286
3287         view->goto_entry = gtk_entry_new ();
3288         g_signal_connect (view->goto_entry, "activate",
3289                           G_CALLBACK (ev_view_goto_entry_activate),
3290                           view);
3291         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
3292         gtk_widget_show (view->goto_entry);
3293         gtk_widget_realize (view->goto_entry);
3294 }
3295
3296 static void
3297 ev_view_goto_entry_grab_focus (EvView *view)
3298 {
3299         GtkWidgetClass *entry_parent_class;
3300
3301         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
3302         (entry_parent_class->grab_focus) (view->goto_entry);
3303
3304         send_focus_change (view->goto_entry, TRUE);
3305 }
3306
3307 static void
3308 ev_view_goto_window_send_key_event (EvView   *view,
3309                                     GdkEvent *event)
3310 {
3311         GdkEventKey *new_event;
3312         GdkScreen   *screen;
3313
3314         /* Move goto window off screen */
3315         screen = gtk_widget_get_screen (GTK_WIDGET (view));
3316         gtk_window_move (GTK_WINDOW (view->goto_window),
3317                          gdk_screen_get_width (screen) + 1,
3318                          gdk_screen_get_height (screen) + 1);
3319         gtk_widget_show (view->goto_window);
3320
3321         new_event = (GdkEventKey *) gdk_event_copy (event);
3322         g_object_unref (new_event->window);
3323         new_event->window = g_object_ref (view->goto_window->window);
3324         gtk_widget_realize (view->goto_window);
3325
3326         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
3327         gdk_event_free ((GdkEvent *)new_event);
3328         gtk_widget_hide (view->goto_window);
3329 }
3330
3331 static gboolean
3332 ev_view_key_press_event (GtkWidget   *widget,
3333                          GdkEventKey *event)
3334 {
3335         EvView *view = EV_VIEW (widget);
3336         EvPresentationState current;
3337
3338         if (!view->document)
3339                 return FALSE;
3340
3341         if (!view->presentation ||
3342             view->presentation_state == EV_PRESENTATION_END)
3343                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3344
3345
3346         current = view->presentation_state;
3347
3348         switch (event->keyval) {
3349                 case GDK_b:
3350                 case GDK_B:
3351                 case GDK_period:
3352                 case GDK_KP_Decimal:
3353                         view->presentation_state =
3354                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
3355                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
3356                         break;
3357                 case GDK_w:
3358                 case GDK_W:
3359                         view->presentation_state =
3360                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
3361                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
3362                         break;
3363                 default:
3364                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
3365                             view->presentation_state == EV_PRESENTATION_WHITE) {
3366                                 view->presentation_state = EV_PRESENTATION_NORMAL;
3367                         }
3368         }
3369
3370         if (current == view->presentation_state) {
3371                 if (ev_page_cache_get_n_pages (view->page_cache) > 1 &&
3372                     key_is_numeric (event->keyval)) {
3373                         gint x, y;
3374
3375                         ev_view_goto_window_create (view);
3376                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
3377                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
3378                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
3379                         gtk_widget_show (view->goto_window);
3380                         ev_view_goto_entry_grab_focus (view);
3381
3382                         return TRUE;
3383                 }
3384
3385                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3386         }
3387
3388         switch (view->presentation_state) {
3389                 case EV_PRESENTATION_NORMAL:
3390                 case EV_PRESENTATION_BLACK:
3391                         gdk_window_set_background (view->layout.bin_window,
3392                                                    &widget->style->black);
3393                         break;
3394                 case EV_PRESENTATION_WHITE:
3395                         gdk_window_set_background (view->layout.bin_window,
3396                                                    &widget->style->white);
3397                         break;
3398                 default:
3399                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3400         }
3401
3402         gtk_widget_queue_draw (widget);
3403         return TRUE;
3404 }
3405
3406 static gint
3407 ev_view_focus_in (GtkWidget     *widget,
3408                   GdkEventFocus *event)
3409 {
3410         if (EV_VIEW (widget)->pixbuf_cache)
3411                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3412         gtk_widget_queue_draw (widget);
3413
3414         return FALSE;
3415 }
3416
3417 static gint
3418 ev_view_focus_out (GtkWidget     *widget,
3419                      GdkEventFocus *event)
3420 {
3421         if (EV_VIEW (widget)->goto_window)
3422                 ev_view_goto_window_hide (EV_VIEW (widget));
3423
3424         if (EV_VIEW (widget)->pixbuf_cache)
3425                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3426         gtk_widget_queue_draw (widget);
3427
3428         return FALSE;
3429 }
3430
3431 static gboolean
3432 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3433 {
3434         EvView *view = EV_VIEW (widget);
3435
3436         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
3437                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3438
3439         return FALSE;
3440 }
3441
3442 static gboolean
3443 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3444 {
3445         EvView *view = EV_VIEW (widget);
3446
3447         ev_view_handle_cursor_over_xy (view, event->x, event->y);
3448
3449         return FALSE;
3450 }
3451
3452 static void
3453 ev_view_style_set (GtkWidget *widget,
3454                    GtkStyle  *old_style)
3455 {
3456         if (EV_VIEW (widget)->pixbuf_cache)
3457                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3458
3459         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
3460 }
3461
3462 /*** Drawing ***/
3463
3464 static guint32
3465 ev_gdk_color_to_rgb (const GdkColor *color)
3466 {
3467   guint32 result;
3468   result = (0xff0000 | (color->red & 0xff00));
3469   result <<= 8;
3470   result |= ((color->green & 0xff00) | (color->blue >> 8));
3471   return result;
3472 }
3473
3474 static void
3475 draw_rubberband (GtkWidget *widget, GdkWindow *window,
3476                  const GdkRectangle *rect, guchar alpha)
3477 {
3478         GdkGC *gc;
3479         GdkPixbuf *pixbuf;
3480         GdkColor *fill_color_gdk;
3481         guint fill_color;
3482
3483         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
3484         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
3485
3486         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
3487                                  rect->width, rect->height);
3488         gdk_pixbuf_fill (pixbuf, fill_color);
3489
3490         gdk_draw_pixbuf (window, NULL, pixbuf,
3491                          0, 0,
3492                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3493                          rect->width, rect->height,
3494                          GDK_RGB_DITHER_NONE,
3495                          0, 0);
3496
3497         g_object_unref (pixbuf);
3498
3499         gc = gdk_gc_new (window);
3500         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
3501         gdk_draw_rectangle (window, gc, FALSE,
3502                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3503                             rect->width - 1,
3504                             rect->height - 1);
3505         g_object_unref (gc);
3506
3507         gdk_color_free (fill_color_gdk);
3508 }
3509
3510
3511 static void
3512 highlight_find_results (EvView *view, int page)
3513 {
3514         gint i, n_results = 0;
3515
3516         n_results = ev_view_find_get_n_results (view, page);
3517
3518         for (i = 0; i < n_results; i++) {
3519                 EvRectangle *rectangle;
3520                 GdkRectangle view_rectangle;
3521                 guchar alpha;
3522
3523                 if (i == view->find_result && page == view->current_page) {
3524                         alpha = 0x90;
3525                 } else {
3526                         alpha = 0x20;
3527                 }
3528
3529                 rectangle = ev_view_find_get_result (view, page, i);
3530                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
3531                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
3532                                  &view_rectangle, alpha);
3533         }
3534 }
3535
3536 static void
3537 draw_loading_text (EvView       *view,
3538                    GdkRectangle *page_area,
3539                    GdkRectangle *expose_area)
3540 {
3541         cairo_t *cr;
3542         gint     width, height;
3543
3544         if (!view->loading_text) {
3545                 const gchar *loading_text = _("Loading...");
3546                 PangoLayout *layout;
3547                 PangoFontDescription *font_desc;
3548                 PangoRectangle logical_rect;
3549                 gint target_width;
3550                 gdouble real_scale;
3551
3552                 ev_document_fc_mutex_lock ();
3553
3554                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
3555
3556                 font_desc = pango_font_description_new ();
3557
3558                 /* We set the font to be 10 points, get the size, and scale appropriately */
3559                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
3560                 pango_layout_set_font_description (layout, font_desc);
3561                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
3562
3563                 target_width = MAX (page_area->width / 2, 1);
3564                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
3565                 pango_font_description_set_size (font_desc, (int)real_scale);
3566                 pango_layout_set_font_description (layout, font_desc);
3567                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
3568
3569                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
3570                                                                  logical_rect.width,
3571                                                                  logical_rect.height);
3572                 cr = cairo_create (view->loading_text);
3573                 cairo_set_source_rgb (cr,
3574                                       155 / (double)255,
3575                                       155 / (double)255,
3576                                       155 / (double)255);
3577                 pango_cairo_show_layout (cr, layout);
3578                 cairo_destroy (cr);
3579
3580                 pango_font_description_free (font_desc);
3581                 g_object_unref (layout);
3582
3583                 ev_document_fc_mutex_unlock ();
3584         }
3585
3586         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
3587         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
3588
3589         cr = gdk_cairo_create (view->layout.bin_window);
3590         cairo_translate (cr,
3591                          page_area->x + width,
3592                          page_area->y + height);
3593         cairo_set_source_surface (cr, view->loading_text, 0, 0);
3594         cairo_paint (cr);
3595         cairo_destroy (cr);
3596 }
3597
3598 static void
3599 draw_one_page (EvView       *view,
3600                gint          page,
3601                cairo_t      *cr,
3602                GdkRectangle *page_area,
3603                GtkBorder    *border,
3604                GdkRectangle *expose_area,
3605                gboolean     *page_ready)
3606 {
3607         GdkRectangle overlap;
3608         GdkRectangle real_page_area;
3609
3610         g_assert (view->document);
3611
3612         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
3613                 return;
3614
3615         /* Render the document itself */
3616         real_page_area = *page_area;
3617
3618         real_page_area.x += border->left;
3619         real_page_area.y += border->top;
3620         real_page_area.width -= (border->left + border->right);
3621         real_page_area.height -= (border->top + border->bottom);
3622         *page_ready = TRUE;
3623
3624         if (!view->presentation) {
3625                 gint current_page;
3626
3627                 current_page = ev_page_cache_get_current_page (view->page_cache);
3628                 ev_document_misc_paint_one_page (view->layout.bin_window,
3629                                                  GTK_WIDGET (view),
3630                                                  page_area, border,
3631                                                  page == current_page);
3632         }
3633
3634         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
3635                 gint             width, height;
3636                 gint             page_width, page_height;
3637                 cairo_surface_t *page_surface = NULL;
3638                 gint             selection_width, selection_height;
3639                 cairo_surface_t *selection_surface = NULL;
3640
3641                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
3642
3643                 if (!page_surface) {
3644                         if (!view->presentation) {
3645                                 draw_loading_text (view,
3646                                                    &real_page_area,
3647                                                    expose_area);
3648                         }
3649
3650                         *page_ready = FALSE;
3651
3652                         return;
3653                 }
3654
3655                 ev_page_cache_get_size (view->page_cache,
3656                                         page, view->rotation,
3657                                         view->scale,
3658                                         &width, &height);
3659
3660                 page_width = cairo_image_surface_get_width (page_surface);
3661                 page_height = cairo_image_surface_get_height (page_surface);
3662
3663                 cairo_save (cr);
3664                 cairo_translate (cr, overlap.x, overlap.y);
3665
3666                 if (width != page_width || height != page_height) {
3667                         cairo_pattern_set_filter (cairo_get_source (cr),
3668                                                   CAIRO_FILTER_FAST);
3669                         cairo_scale (cr,
3670                                      (gdouble)width / page_width,
3671                                      (gdouble)height / page_height);
3672                 }
3673
3674                 cairo_surface_set_device_offset (page_surface,
3675                                                  overlap.x - real_page_area.x,
3676                                                  overlap.y - real_page_area.y);
3677                 cairo_set_source_surface (cr, page_surface, 0, 0);
3678                 cairo_paint (cr);
3679                 cairo_restore (cr);
3680
3681                 /* Get the selection pixbuf iff we have something to draw */
3682                 if (find_selection_for_page (view, page) &&
3683                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
3684                         selection_surface =
3685                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
3686                                                                        page,
3687                                                                        view->scale,
3688                                                                        NULL);
3689                 }
3690
3691                 if (!selection_surface) {
3692                         return;
3693                 }
3694
3695                 selection_width = cairo_image_surface_get_width (selection_surface);
3696                 selection_height = cairo_image_surface_get_height (selection_surface);
3697
3698                 cairo_save (cr);
3699                 cairo_translate (cr, overlap.x, overlap.y);
3700
3701                 if (width != selection_width || height != selection_height) {
3702                         cairo_pattern_set_filter (cairo_get_source (cr),
3703                                                   CAIRO_FILTER_FAST);
3704                         cairo_scale (cr,
3705                                      (gdouble)width / selection_width,
3706                                      (gdouble)height / selection_height);
3707                 }
3708
3709                 cairo_surface_set_device_offset (selection_surface,
3710                                                  overlap.x - real_page_area.x,
3711                                                  overlap.y - real_page_area.y);
3712                 cairo_set_source_surface (cr, selection_surface, 0, 0);
3713                 cairo_paint (cr);
3714                 cairo_restore (cr);
3715         }
3716 }
3717
3718 /*** GObject functions ***/
3719
3720 static void
3721 ev_view_finalize (GObject *object)
3722 {
3723         EvView *view = EV_VIEW (object);
3724
3725         clear_selection (view);
3726         clear_link_selected (view);
3727
3728         if (view->image_dnd_info.image)
3729                 g_object_unref (view->image_dnd_info.image);
3730         view->image_dnd_info.image = NULL;
3731
3732         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
3733 }
3734
3735 static void
3736 ev_view_destroy (GtkObject *object)
3737 {
3738         EvView *view = EV_VIEW (object);
3739
3740         if (view->document) {
3741                 g_object_unref (view->document);
3742                 view->document = NULL;
3743         }
3744
3745         if (view->pixbuf_cache) {
3746                 g_object_unref (view->pixbuf_cache);
3747                 view->pixbuf_cache = NULL;
3748         }
3749
3750         if (view->goto_window) {
3751                 gtk_widget_destroy (view->goto_window);
3752                 view->goto_window = NULL;
3753                 view->goto_entry = NULL;
3754         }
3755
3756         if (view->selection_scroll_id) {
3757             g_source_remove (view->selection_scroll_id);
3758             view->selection_scroll_id = 0;
3759         }
3760
3761         if (view->selection_update_id) {
3762             g_source_remove (view->selection_update_id);
3763             view->selection_update_id = 0;
3764         }
3765
3766         if (view->loading_text) {
3767                 cairo_surface_destroy (view->loading_text);
3768                 view->loading_text = NULL;
3769         }
3770
3771         if (view->scroll_info.timeout_id) {
3772             g_source_remove (view->scroll_info.timeout_id);
3773             view->scroll_info.timeout_id = 0;
3774         }
3775
3776         if (view->drag_info.drag_timeout_id) {
3777                 g_source_remove (view->drag_info.drag_timeout_id);
3778                 view->drag_info.drag_timeout_id = 0;
3779         }
3780
3781         if (view->drag_info.release_timeout_id) {
3782                 g_source_remove (view->drag_info.release_timeout_id);
3783                 view->drag_info.release_timeout_id = 0;
3784         }
3785
3786         ev_view_presentation_transition_stop (view);
3787
3788         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
3789
3790         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
3791 }
3792
3793 static void
3794 ev_view_set_property (GObject      *object,
3795                       guint         prop_id,
3796                       const GValue *value,
3797                       GParamSpec   *pspec)
3798 {
3799         EvView *view = EV_VIEW (object);
3800
3801         switch (prop_id) {
3802                 case PROP_CONTINUOUS:
3803                         ev_view_set_continuous (view, g_value_get_boolean (value));
3804                         break;
3805                 case PROP_DUAL_PAGE:
3806                         ev_view_set_dual_page (view, g_value_get_boolean (value));
3807                         break;
3808                 case PROP_FULLSCREEN:
3809                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
3810                         break;
3811                 case PROP_PRESENTATION:
3812                         ev_view_set_presentation (view, g_value_get_boolean (value));
3813                         break;
3814                 case PROP_SIZING_MODE:
3815                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
3816                         break;
3817                 case PROP_ZOOM:
3818                         ev_view_set_zoom (view, g_value_get_double (value), FALSE);
3819                         break;
3820                 case PROP_ROTATION:
3821                         ev_view_set_rotation (view, g_value_get_int (value));
3822                         break;
3823                 default:
3824                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
3825         }
3826 }
3827
3828 static AtkObject *
3829 ev_view_get_accessible (GtkWidget *widget)
3830 {
3831         static gboolean first_time = TRUE;
3832
3833         if (first_time) {
3834                 AtkObjectFactory *factory;
3835                 AtkRegistry *registry;
3836                 GType derived_type;
3837                 GType derived_atk_type;
3838
3839                 /*
3840                  * Figure out whether accessibility is enabled by looking at the
3841                  * type of the accessible object which would be created for
3842                  * the parent type of EvView.
3843                  */
3844                 derived_type = g_type_parent (EV_TYPE_VIEW);
3845
3846                 registry = atk_get_default_registry ();
3847                 factory = atk_registry_get_factory (registry,
3848                                                     derived_type);
3849                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
3850                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
3851                         atk_registry_set_factory_type (registry,
3852                                                        EV_TYPE_VIEW,
3853                                                        ev_view_accessible_factory_get_type ());
3854                 first_time = FALSE;
3855         }
3856         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
3857 }
3858
3859 static void
3860 ev_view_get_property (GObject *object,
3861                       guint prop_id,
3862                       GValue *value,
3863                       GParamSpec *pspec)
3864 {
3865         EvView *view = EV_VIEW (object);
3866
3867         switch (prop_id) {
3868                 case PROP_CONTINUOUS:
3869                         g_value_set_boolean (value, view->continuous);
3870                         break;
3871                 case PROP_DUAL_PAGE:
3872                         g_value_set_boolean (value, view->dual_page);
3873                         break;
3874                 case PROP_FULLSCREEN:
3875                         g_value_set_boolean (value, view->fullscreen);
3876                         break;
3877                 case PROP_PRESENTATION:
3878                         g_value_set_boolean (value, view->presentation);
3879                         break;
3880                 case PROP_SIZING_MODE:
3881                         g_value_set_enum (value, view->sizing_mode);
3882                         break;
3883                 case PROP_ZOOM:
3884                         g_value_set_double (value, view->scale);
3885                         break;
3886                 case PROP_ROTATION:
3887                         g_value_set_int (value, view->rotation);
3888                         break;
3889                 case PROP_HAS_SELECTION:
3890                         g_value_set_boolean (value,
3891                                              view->selection_info.selections != NULL);
3892                         break;
3893                 default:
3894                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
3895         }
3896 }
3897
3898 static void
3899 ev_view_class_init (EvViewClass *class)
3900 {
3901         GObjectClass *object_class = G_OBJECT_CLASS (class);
3902         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
3903         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
3904         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
3905         GtkBindingSet *binding_set;
3906
3907         object_class->finalize = ev_view_finalize;
3908         object_class->set_property = ev_view_set_property;
3909         object_class->get_property = ev_view_get_property;
3910
3911         widget_class->expose_event = ev_view_expose_event;
3912         widget_class->button_press_event = ev_view_button_press_event;
3913         widget_class->motion_notify_event = ev_view_motion_notify_event;
3914         widget_class->button_release_event = ev_view_button_release_event;
3915         widget_class->key_press_event = ev_view_key_press_event;
3916         widget_class->focus_in_event = ev_view_focus_in;
3917         widget_class->focus_out_event = ev_view_focus_out;
3918         widget_class->get_accessible = ev_view_get_accessible;
3919         widget_class->size_request = ev_view_size_request;
3920         widget_class->size_allocate = ev_view_size_allocate;
3921         widget_class->realize = ev_view_realize;
3922         widget_class->scroll_event = ev_view_scroll_event;
3923         widget_class->enter_notify_event = ev_view_enter_notify_event;
3924         widget_class->leave_notify_event = ev_view_leave_notify_event;
3925         widget_class->style_set = ev_view_style_set;
3926         widget_class->drag_data_get = ev_view_drag_data_get;
3927         widget_class->drag_motion = ev_view_drag_motion;
3928         widget_class->popup_menu = ev_view_popup_menu;
3929         widget_class->query_tooltip = ev_view_query_tooltip;
3930
3931         gtk_object_class->destroy = ev_view_destroy;
3932
3933         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
3934
3935         class->binding_activated = ev_view_scroll;
3936
3937         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
3938                          G_TYPE_FROM_CLASS (object_class),
3939                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
3940                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
3941                          NULL, NULL,
3942                          ev_view_marshal_VOID__ENUM_BOOLEAN,
3943                          G_TYPE_NONE, 2,
3944                          GTK_TYPE_SCROLL_TYPE,
3945                          G_TYPE_BOOLEAN);
3946
3947         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
3948                          G_TYPE_FROM_CLASS (object_class),
3949                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
3950                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
3951                          NULL, NULL,
3952                          g_cclosure_marshal_VOID__VOID,
3953                          G_TYPE_NONE, 0, G_TYPE_NONE);
3954         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
3955                          G_TYPE_FROM_CLASS (object_class),
3956                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
3957                          G_STRUCT_OFFSET (EvViewClass, handle_link),
3958                          NULL, NULL,
3959                          g_cclosure_marshal_VOID__OBJECT,
3960                          G_TYPE_NONE, 1,
3961                          G_TYPE_OBJECT);
3962         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
3963                          G_TYPE_FROM_CLASS (object_class),
3964                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
3965                          G_STRUCT_OFFSET (EvViewClass, external_link),
3966                          NULL, NULL,
3967                          g_cclosure_marshal_VOID__OBJECT,
3968                          G_TYPE_NONE, 1,
3969                          G_TYPE_OBJECT);
3970         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
3971                          G_TYPE_FROM_CLASS (object_class),
3972                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
3973                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
3974                          NULL, NULL,
3975                          g_cclosure_marshal_VOID__OBJECT,
3976                          G_TYPE_NONE, 1,
3977                          G_TYPE_OBJECT);
3978
3979
3980         g_object_class_install_property (object_class,
3981                                          PROP_CONTINUOUS,
3982                                          g_param_spec_boolean ("continuous",
3983                                                                "Continuous",
3984                                                                "Continuous scrolling mode",
3985                                                                TRUE,
3986                                                                G_PARAM_READWRITE));
3987
3988         g_object_class_install_property (object_class,
3989                                          PROP_DUAL_PAGE,
3990                                          g_param_spec_boolean ("dual-page",
3991                                                                "Dual Page",
3992                                                                "Two pages visible at once",
3993                                                                FALSE,
3994                                                                G_PARAM_READWRITE));
3995         g_object_class_install_property (object_class,
3996                                          PROP_FULLSCREEN,
3997                                          g_param_spec_boolean ("fullscreen",
3998                                                                "Full Screen",
3999                                                                "Draw page in a fullscreen fashion",
4000                                                                FALSE,
4001                                                                G_PARAM_READWRITE));
4002         g_object_class_install_property (object_class,
4003                                          PROP_PRESENTATION,
4004                                          g_param_spec_boolean ("presentation",
4005                                                                "Presentation",
4006                                                                "Draw page in presentation mode",
4007                                                                TRUE,
4008                                                                G_PARAM_READWRITE));
4009
4010         g_object_class_install_property (object_class,
4011                                          PROP_SIZING_MODE,
4012                                          g_param_spec_enum ("sizing-mode",
4013                                                             "Sizing Mode",
4014                                                             "Sizing Mode",
4015                                                             EV_TYPE_SIZING_MODE,
4016                                                             EV_SIZING_FIT_WIDTH,
4017                                                             G_PARAM_READWRITE));
4018
4019         g_object_class_install_property (object_class,
4020                                          PROP_ZOOM,
4021                                          g_param_spec_double ("zoom",
4022                                                               "Zoom factor",
4023                                                               "Zoom factor",
4024                                                               0,
4025                                                               G_MAXDOUBLE,
4026                                                               1.0,
4027                                                               G_PARAM_READWRITE));
4028         g_object_class_install_property (object_class,
4029                                          PROP_ROTATION,
4030                                          g_param_spec_double ("rotation",
4031                                                               "Rotation",
4032                                                               "Rotation",
4033                                                               0,
4034                                                               360,
4035                                                               0,
4036                                                               G_PARAM_READWRITE));
4037         g_object_class_install_property (object_class,
4038                                          PROP_HAS_SELECTION,
4039                                          g_param_spec_boolean ("has-selection",
4040                                                                "Has selection",
4041                                                                "The view has selections",
4042                                                                FALSE,
4043                                                                G_PARAM_READABLE));
4044
4045         binding_set = gtk_binding_set_by_class (class);
4046
4047         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4048         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4049         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4050         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4051         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4052         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4053         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4054         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4055         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4056                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4057         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4058                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4059         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4060                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4061         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4062                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4063
4064 }
4065
4066 static void
4067 ev_view_init (EvView *view)
4068 {
4069         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4070
4071         view->spacing = 5;
4072         view->scale = 1.0;
4073         view->current_page = 0;
4074         view->pressed_button = -1;
4075         view->cursor = EV_VIEW_CURSOR_NORMAL;
4076         view->drag_info.in_drag = FALSE;
4077         view->scroll_info.autoscrolling = FALSE;
4078         view->selection_info.selections = NULL;
4079         view->selection_info.in_selection = FALSE;
4080         view->selection_info.in_drag = FALSE;
4081         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4082         view->continuous = TRUE;
4083         view->dual_page = FALSE;
4084         view->presentation = FALSE;
4085         view->presentation_state = EV_PRESENTATION_NORMAL;
4086         view->fullscreen = FALSE;
4087         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4088         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4089         view->jump_to_find_result = TRUE;
4090         view->highlight_find_results = FALSE;
4091
4092         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4093         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4094 }
4095
4096 /*** Callbacks ***/
4097
4098 static void
4099 ev_view_change_page (EvView *view,
4100                      gint    new_page,
4101                      gboolean start_transition)
4102 {
4103         gint x, y;
4104
4105         view->current_page = new_page;
4106         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4107
4108         if (view->presentation && start_transition)
4109                 ev_view_presentation_transition_start (view);
4110
4111         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4112         ev_view_handle_cursor_over_xy (view, x, y);
4113
4114         gtk_widget_queue_resize (GTK_WIDGET (view));
4115 }
4116
4117 static void
4118 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4119                                      EvView                *view)
4120 {
4121         g_object_unref (view->animation);
4122         view->animation = NULL;
4123         ev_view_change_page (view, view->current_page, TRUE);
4124 }
4125
4126 /**
4127  * ev_view_transition_animation_cancel:
4128  * @animation: Animation to finish
4129  * @view: An EvView
4130  *
4131  * Does almost the same as cancel, but without scheduling the transition.
4132  */
4133
4134 static void
4135 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4136                                      EvView                *view)
4137 {
4138         g_object_unref (view->animation);
4139         view->animation = NULL;
4140         ev_view_change_page (view, view->current_page, FALSE);
4141 }
4142
4143 static void
4144 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4145                                     gdouble                progress,
4146                                     EvView                *view)
4147 {
4148         gtk_widget_queue_draw (GTK_WIDGET (view));
4149 }
4150
4151 static void
4152 ev_view_presentation_animation_start (EvView *view,
4153                                       int     new_page)
4154 {
4155         EvTransitionEffect *effect = NULL;
4156         cairo_surface_t *surface;
4157
4158         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4159                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4160                                                             view->current_page);
4161         if (!effect)
4162                 return;
4163
4164         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4165         view->animation = ev_transition_animation_new (effect);
4166         ev_transition_animation_set_origin_surface (view->animation, surface);
4167
4168         g_signal_connect (view->animation, "frame",
4169                           G_CALLBACK (ev_view_transition_animation_frame), view);
4170         g_signal_connect (view->animation, "finished",
4171                           G_CALLBACK (ev_view_transition_animation_finish), view);
4172 }
4173
4174 static void
4175 job_finished_cb (EvPixbufCache *pixbuf_cache,
4176                  GdkRegion     *region,
4177                  EvView        *view)
4178 {
4179         if (view->animation) {
4180                 cairo_surface_t *surface;
4181
4182                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4183                 ev_transition_animation_set_dest_surface (view->animation, surface);
4184         }
4185
4186         if (region) {
4187                 gdk_window_invalidate_region (view->layout.bin_window,
4188                                               region, TRUE);
4189         } else {
4190                 gtk_widget_queue_draw (GTK_WIDGET (view));
4191         }
4192 }
4193
4194 static void
4195 page_changed_cb (EvPageCache *page_cache,
4196                  int          new_page,
4197                  EvView      *view)
4198 {
4199         if (view->current_page != new_page) {
4200                 if (view->presentation)
4201                         ev_view_presentation_animation_start (view, new_page);
4202
4203                 ev_view_change_page (view, new_page, TRUE);
4204         } else {
4205                 gtk_widget_queue_draw (GTK_WIDGET (view));
4206         }
4207
4208         view->find_result = 0;
4209 }
4210
4211 static void
4212 on_adjustment_value_changed (GtkAdjustment *adjustment,
4213                              EvView        *view)
4214 {
4215         int dx = 0, dy = 0;
4216         gint x, y;
4217         GList *children, *l;
4218
4219         if (! GTK_WIDGET_REALIZED (view))
4220                 return;
4221
4222         if (view->hadjustment) {
4223                 dx = view->scroll_x - (int) view->hadjustment->value;
4224                 view->scroll_x = (int) view->hadjustment->value;
4225         } else {
4226                 view->scroll_x = 0;
4227         }
4228
4229         if (view->vadjustment) {
4230                 dy = view->scroll_y - (int) view->vadjustment->value;
4231                 view->scroll_y = (int) view->vadjustment->value;
4232         } else {
4233                 view->scroll_y = 0;
4234         }
4235
4236         children = gtk_container_get_children (GTK_CONTAINER (view));
4237         for (l = children; l && l->data; l = g_list_next (l)) {
4238                 gint       child_x, child_y;
4239                 GtkWidget *child = (GtkWidget *)l->data;
4240
4241                 gtk_container_child_get (GTK_CONTAINER (view),
4242                                          child,
4243                                          "x", &child_x,
4244                                          "y", &child_y,
4245                                          NULL);
4246                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4247         }
4248         g_list_free (children);
4249
4250         if (view->pending_resize)
4251                 gtk_widget_queue_draw (GTK_WIDGET (view));
4252         else
4253                 gdk_window_scroll (view->layout.bin_window, dx, dy);
4254
4255         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4256         ev_view_handle_cursor_over_xy (view, x, y);
4257
4258         if (view->document)
4259                 view_update_range_and_current_page (view);
4260 }
4261
4262 GtkWidget*
4263 ev_view_new (void)
4264 {
4265         GtkWidget *view;
4266
4267         view = g_object_new (EV_TYPE_VIEW, NULL);
4268
4269         return view;
4270 }
4271
4272 static void
4273 setup_caches (EvView *view)
4274 {
4275         view->page_cache = ev_page_cache_get (view->document);
4276         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
4277         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
4278         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4279         page_changed_cb (view->page_cache,
4280                          ev_page_cache_get_current_page (view->page_cache),
4281                          view);
4282 }
4283
4284 static void
4285 clear_caches (EvView *view)
4286 {
4287         if (view->pixbuf_cache) {
4288                 g_object_unref (view->pixbuf_cache);
4289                 view->pixbuf_cache = NULL;
4290         }
4291
4292         if (view->page_cache) {
4293                 view->page_cache = NULL;
4294         }
4295 }
4296
4297 void
4298 ev_view_set_loading (EvView       *view,
4299                      gboolean      loading)
4300 {
4301         view->loading = loading;
4302         gtk_widget_queue_draw (GTK_WIDGET (view));
4303 }
4304
4305 static gboolean
4306 ev_view_autoscroll_cb (EvView *view)
4307 {
4308         gdouble speed, value;
4309
4310         /* If the user stops autoscrolling, autoscrolling will be
4311          * set to false but the timeout will continue; stop the timeout: */
4312         if (!view->scroll_info.autoscrolling) {
4313                 view->scroll_info.timeout_id = 0;
4314                 return FALSE;
4315         }
4316
4317         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4318                 (view->scroll_info.last_y < view->scroll_info.start_y))
4319                 return TRUE;
4320
4321         /* Replace 100 with your speed of choice: The lower the faster.
4322          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4323          *      based on the distance of the starting point from the mouse
4324          * (All also effected by the timeout interval of this callback) */
4325
4326         if (view->scroll_info.start_y > view->scroll_info.last_y)
4327                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
4328         else
4329                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
4330
4331         value = gtk_adjustment_get_value (view->vadjustment);
4332         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
4333         gtk_adjustment_set_value (view->vadjustment, value);
4334
4335         return TRUE;
4336
4337 }
4338
4339 void
4340 ev_view_autoscroll_start (EvView *view)
4341 {
4342         gint x, y;
4343
4344         g_return_if_fail (EV_IS_VIEW (view));
4345
4346         if (view->scroll_info.autoscrolling)
4347                 return;
4348
4349         view->scroll_info.autoscrolling = TRUE;
4350         view->scroll_info.timeout_id =
4351                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
4352                                view);
4353
4354         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4355         ev_view_handle_cursor_over_xy (view, x, y);
4356 }
4357
4358 void
4359 ev_view_autoscroll_stop (EvView *view)
4360 {
4361         gint x, y;
4362
4363         g_return_if_fail (EV_IS_VIEW (view));
4364
4365         if (!view->scroll_info.autoscrolling)
4366                 return;
4367
4368         view->scroll_info.autoscrolling = FALSE;
4369         if (view->scroll_info.timeout_id) {
4370                 g_source_remove (view->scroll_info.timeout_id);
4371                 view->scroll_info.timeout_id = 0;
4372         }
4373
4374         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4375         ev_view_handle_cursor_over_xy (view, x, y);
4376 }
4377
4378 void
4379 ev_view_set_document (EvView     *view,
4380                       EvDocument *document)
4381 {
4382         g_return_if_fail (EV_IS_VIEW (view));
4383
4384         view->loading = FALSE;
4385
4386         if (document != view->document) {
4387                 clear_caches (view);
4388
4389                 if (view->document) {
4390                         g_object_unref (view->document);
4391                         view->page_cache = NULL;
4392                 }
4393
4394                 view->document = document;
4395                 view->find_result = 0;
4396
4397                 if (view->document) {
4398                         g_object_ref (view->document);
4399                         setup_caches (view);
4400                 }
4401
4402                 gtk_widget_queue_resize (GTK_WIDGET (view));
4403         }
4404 }
4405
4406 static void
4407 ev_view_reload_page (EvView    *view,
4408                      gint       page,
4409                      GdkRegion *region)
4410 {
4411         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
4412                                      region,
4413                                      page,
4414                                      view->rotation,
4415                                      view->scale);
4416 }
4417
4418 void
4419 ev_view_reload (EvView *view)
4420 {
4421         ev_pixbuf_cache_clear (view->pixbuf_cache);
4422         view_update_range_and_current_page (view);
4423 }
4424
4425 /*** Zoom and sizing mode ***/
4426
4427 #define EPSILON 0.0000001
4428 void
4429 ev_view_set_zoom (EvView   *view,
4430                   double    factor,
4431                   gboolean  relative)
4432 {
4433         double scale;
4434
4435         if (relative)
4436                 scale = view->scale * factor;
4437         else
4438                 scale = factor;
4439
4440         scale = CLAMP (scale,
4441                        view->sizing_mode == EV_SIZING_FREE ? view->min_scale : 0,
4442                        view->max_scale);
4443
4444         if (ABS (view->scale - scale) < EPSILON)
4445                 return;
4446
4447         if (view->loading_text) {
4448                 cairo_surface_destroy (view->loading_text);
4449                 view->loading_text = NULL;
4450         }
4451
4452         view->scale = scale;
4453         view->pending_resize = TRUE;
4454
4455         gtk_widget_queue_resize (GTK_WIDGET (view));
4456
4457         g_object_notify (G_OBJECT (view), "zoom");
4458 }
4459
4460 double
4461 ev_view_get_zoom (EvView *view)
4462 {
4463         return view->scale;
4464 }
4465
4466 void
4467 ev_view_set_screen_dpi (EvView  *view,
4468                         gdouble  dpi)
4469 {
4470         g_return_if_fail (EV_IS_VIEW (view));
4471         g_return_if_fail (dpi > 0);
4472
4473         view->dpi = dpi;
4474         view->min_scale = MIN_SCALE * dpi / 72.0;
4475         view->max_scale = MAX_SCALE * dpi / 72.0;
4476 }
4477
4478 gboolean
4479 ev_view_get_continuous (EvView *view)
4480 {
4481         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4482
4483         return view->continuous;
4484 }
4485
4486 void
4487 ev_view_set_continuous (EvView   *view,
4488                         gboolean  continuous)
4489 {
4490         g_return_if_fail (EV_IS_VIEW (view));
4491
4492         continuous = continuous != FALSE;
4493
4494         if (view->continuous != continuous) {
4495                 view->continuous = continuous;
4496                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4497                 gtk_widget_queue_resize (GTK_WIDGET (view));
4498         }
4499
4500         g_object_notify (G_OBJECT (view), "continuous");
4501 }
4502
4503 gboolean
4504 ev_view_get_dual_page (EvView *view)
4505 {
4506         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4507
4508         return view->dual_page;
4509 }
4510
4511 void
4512 ev_view_set_dual_page (EvView   *view,
4513                        gboolean  dual_page)
4514 {
4515         g_return_if_fail (EV_IS_VIEW (view));
4516
4517         dual_page = dual_page != FALSE;
4518
4519         if (view->dual_page == dual_page)
4520                 return;
4521
4522         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4523         view->dual_page = dual_page;
4524         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
4525          * preload_cache_size to be 2 if dual_page is set.
4526          */
4527         gtk_widget_queue_resize (GTK_WIDGET (view));
4528
4529         g_object_notify (G_OBJECT (view), "dual-page");
4530 }
4531
4532 void
4533 ev_view_set_fullscreen (EvView   *view,
4534                          gboolean  fullscreen)
4535 {
4536         g_return_if_fail (EV_IS_VIEW (view));
4537
4538         fullscreen = fullscreen != FALSE;
4539
4540         if (view->fullscreen == fullscreen)
4541                 return;
4542
4543         view->fullscreen = fullscreen;
4544         gtk_widget_queue_resize (GTK_WIDGET (view));
4545
4546         g_object_notify (G_OBJECT (view), "fullscreen");
4547 }
4548
4549 gboolean
4550 ev_view_get_fullscreen (EvView *view)
4551 {
4552         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4553
4554         return view->fullscreen;
4555 }
4556
4557 void
4558 ev_view_set_presentation (EvView   *view,
4559                           gboolean  presentation)
4560 {
4561         g_return_if_fail (EV_IS_VIEW (view));
4562
4563         presentation = presentation != FALSE;
4564
4565         if (view->presentation == presentation)
4566                 return;
4567
4568         if (!presentation)
4569                 view->presentation_state = EV_PRESENTATION_NORMAL;
4570
4571         view->presentation = presentation;
4572         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4573
4574         if (presentation) {
4575                 view->sizing_mode_saved = view->sizing_mode;
4576                 view->scale_saved = view->scale;
4577                 ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
4578         } else {
4579                 ev_view_set_sizing_mode (view, view->sizing_mode_saved);
4580                 ev_view_set_zoom (view, view->scale_saved, FALSE);
4581         }
4582
4583         gtk_widget_queue_resize (GTK_WIDGET (view));
4584
4585         if (presentation)
4586                 ev_view_presentation_transition_start (view);
4587         else {
4588                 ev_view_presentation_transition_stop (view);
4589
4590                 if (view->animation) {
4591                         /* stop any running animation */
4592                         ev_view_transition_animation_cancel (view->animation, view);
4593                 }
4594         }
4595
4596         if (GTK_WIDGET_REALIZED (view)) {
4597                 if (view->presentation)
4598                         gdk_window_set_background (view->layout.bin_window,
4599                                                    &GTK_WIDGET (view)->style->black);
4600                 else
4601                         gdk_window_set_background (view->layout.bin_window,
4602                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
4603         }
4604
4605         g_object_notify (G_OBJECT (view), "presentation");
4606 }
4607
4608 gboolean
4609 ev_view_get_presentation (EvView *view)
4610 {
4611         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4612
4613         return view->presentation;
4614 }
4615
4616 static gboolean
4617 transition_next_page (EvView *view)
4618 {
4619         ev_view_next_page (view);
4620
4621         return FALSE;
4622 }
4623
4624 static void
4625 ev_view_presentation_transition_stop (EvView *view)
4626 {
4627         if (view->trans_timeout_id > 0)
4628                 g_source_remove (view->trans_timeout_id);
4629         view->trans_timeout_id = 0;
4630 }
4631
4632 static void
4633 ev_view_presentation_transition_start (EvView *view)
4634 {
4635         gdouble duration;
4636
4637         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
4638                 return;
4639
4640         ev_view_presentation_transition_stop (view);
4641
4642         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
4643                                                              view->current_page);
4644         if (duration > 0) {
4645                 view->trans_timeout_id =
4646                         g_timeout_add_seconds (duration,
4647                                                (GSourceFunc) transition_next_page,
4648                                                view);
4649         }
4650 }
4651
4652 void
4653 ev_view_set_sizing_mode (EvView       *view,
4654                          EvSizingMode  sizing_mode)
4655 {
4656         g_return_if_fail (EV_IS_VIEW (view));
4657
4658         if (view->sizing_mode == sizing_mode)
4659                 return;
4660
4661         view->sizing_mode = sizing_mode;
4662         gtk_widget_queue_resize (GTK_WIDGET (view));
4663
4664         g_object_notify (G_OBJECT (view), "sizing-mode");
4665 }
4666
4667 EvSizingMode
4668 ev_view_get_sizing_mode (EvView *view)
4669 {
4670         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
4671
4672         return view->sizing_mode;
4673 }
4674
4675 gboolean
4676 ev_view_can_zoom_in (EvView *view)
4677 {
4678         return view->scale * ZOOM_IN_FACTOR <= view->max_scale;
4679 }
4680
4681 gboolean
4682 ev_view_can_zoom_out (EvView *view)
4683 {
4684         return view->scale * ZOOM_OUT_FACTOR >= view->min_scale;
4685 }
4686
4687 void
4688 ev_view_zoom_in (EvView *view)
4689 {
4690         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
4691
4692         if (view->presentation)
4693                 return;
4694
4695         view->pending_scroll = SCROLL_TO_CENTER;
4696         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
4697 }
4698
4699 void
4700 ev_view_zoom_out (EvView *view)
4701 {
4702         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
4703
4704         if (view->presentation)
4705                 return;
4706
4707         view->pending_scroll = SCROLL_TO_CENTER;
4708         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
4709 }
4710
4711 void
4712 ev_view_rotate_right (EvView *view)
4713 {
4714         int rotation = view->rotation + 90;
4715
4716         if (rotation >= 360) {
4717                 rotation -= 360;
4718         }
4719
4720         ev_view_set_rotation (view, rotation);
4721 }
4722
4723 void
4724 ev_view_rotate_left (EvView *view)
4725 {
4726         int rotation = view->rotation - 90;
4727
4728         if (rotation < 0) {
4729                 rotation += 360;
4730         }
4731
4732         ev_view_set_rotation (view, rotation);
4733 }
4734
4735 void
4736 ev_view_set_rotation (EvView *view, int rotation)
4737 {
4738         view->rotation = rotation;
4739
4740         if (view->pixbuf_cache) {
4741                 ev_pixbuf_cache_clear (view->pixbuf_cache);
4742                 gtk_widget_queue_resize (GTK_WIDGET (view));
4743         }
4744
4745         if (rotation != 0)
4746                 clear_selection (view);
4747
4748         g_object_notify (G_OBJECT (view), "rotation");
4749 }
4750
4751 int
4752 ev_view_get_rotation (EvView *view)
4753 {
4754         return view->rotation;
4755 }
4756
4757 static double
4758 zoom_for_size_fit_width (int doc_width,
4759                          int doc_height,
4760                          int target_width,
4761                          int target_height,
4762                          int vsb_width)
4763 {
4764         double scale;
4765
4766         scale = (double)target_width / doc_width;
4767
4768         if (doc_height * scale > target_height)
4769                 scale = (double) (target_width - vsb_width) / doc_width;
4770
4771         return scale;
4772 }
4773
4774 static double
4775 zoom_for_size_fit_height (int doc_width,
4776                           int doc_height,
4777                           int target_width,
4778                           int target_height,
4779                           int vsb_height)
4780 {
4781         double scale;
4782
4783         scale = (double)target_height / doc_height;
4784
4785         if (doc_width * scale > target_width)
4786                 scale = (double) (target_height - vsb_height) / doc_height;
4787
4788         return scale;
4789 }
4790
4791 static double
4792 zoom_for_size_best_fit (int doc_width,
4793                         int doc_height,
4794                         int target_width,
4795                         int target_height,
4796                         int vsb_width,
4797                         int hsb_width)
4798 {
4799         double w_scale;
4800         double h_scale;
4801
4802         w_scale = (double)target_width / doc_width;
4803         h_scale = (double)target_height / doc_height;
4804
4805         if (doc_height * w_scale > target_height)
4806                 w_scale = (double) (target_width - vsb_width) / doc_width;
4807         if (doc_width * h_scale > target_width)
4808                 h_scale = (double) (target_height - hsb_width) / doc_height;
4809
4810         return MIN (w_scale, h_scale);
4811 }
4812
4813
4814 static void
4815 ev_view_zoom_for_size_presentation (EvView *view,
4816                                     int     width,
4817                                     int     height)
4818 {
4819         int doc_width, doc_height;
4820         gdouble scale;
4821
4822         ev_page_cache_get_size (view->page_cache,
4823                                 view->current_page,
4824                                 view->rotation,
4825                                 1.0,
4826                                 &doc_width,
4827                                 &doc_height);
4828         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
4829         ev_view_set_zoom (view, scale, FALSE);
4830 }
4831
4832 static void
4833 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
4834                            int     width,
4835                            int     height,
4836                            int     vsb_width,
4837                            int     hsb_height)
4838 {
4839         int doc_width, doc_height;
4840         GtkBorder border;
4841         gdouble scale;
4842
4843         ev_page_cache_get_max_width (view->page_cache,
4844                                      view->rotation,
4845                                      1.0,
4846                                      &doc_width);
4847         ev_page_cache_get_max_height (view->page_cache,
4848                                       view->rotation,
4849                                       1.0,
4850                                       &doc_height);
4851         compute_border (view, doc_width, doc_height, &border);
4852
4853         doc_width = doc_width * 2;
4854         width -= (2 * (border.left + border.right) + 3 * view->spacing);
4855         height -= (border.top + border.bottom + 2 * view->spacing - 1);
4856
4857         /* FIXME: We really need to calculate the overall height here, not the
4858          * page height.  We assume there's always a vertical scrollbar for
4859          * now.  We need to fix this. */
4860         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4861                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
4862         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4863                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
4864         else
4865                 g_assert_not_reached ();
4866
4867         ev_view_set_zoom (view, scale, FALSE);
4868 }
4869
4870 static void
4871 ev_view_zoom_for_size_continuous (EvView *view,
4872                                   int     width,
4873                                   int     height,
4874                                   int     vsb_width,
4875                                   int     hsb_height)
4876 {
4877         int doc_width, doc_height;
4878         GtkBorder border;
4879         gdouble scale;
4880
4881         ev_page_cache_get_max_width (view->page_cache,
4882                                      view->rotation,
4883                                      1.0,
4884                                      &doc_width);
4885         ev_page_cache_get_max_height (view->page_cache,
4886                                       view->rotation,
4887                                       1.0,
4888                                       &doc_height);
4889         compute_border (view, doc_width, doc_height, &border);
4890
4891         width -= (border.left + border.right + 2 * view->spacing);
4892         height -= (border.top + border.bottom + 2 * view->spacing - 1);
4893
4894         /* FIXME: We really need to calculate the overall height here, not the
4895          * page height.  We assume there's always a vertical scrollbar for
4896          * now.  We need to fix this. */
4897         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4898                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
4899         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4900                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
4901         else
4902                 g_assert_not_reached ();
4903
4904         ev_view_set_zoom (view, scale, FALSE);
4905 }
4906
4907 static void
4908 ev_view_zoom_for_size_dual_page (EvView *view,
4909                                  int     width,
4910                                  int     height,
4911                                  int     vsb_width,
4912                                  int     hsb_height)
4913 {
4914         GtkBorder border;
4915         gint doc_width, doc_height;
4916         gdouble scale;
4917         gint other_page;
4918
4919         other_page = view->current_page ^ 1;
4920
4921         /* Find the largest of the two. */
4922         ev_page_cache_get_size (view->page_cache,
4923                                 view->current_page,
4924                                 view->rotation,
4925                                 1.0,
4926                                 &doc_width, &doc_height);
4927
4928         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
4929                 gint width_2, height_2;
4930                 ev_page_cache_get_size (view->page_cache,
4931                                         other_page,
4932                                         view->rotation,
4933                                         1.0,
4934                                         &width_2, &height_2);
4935                 if (width_2 > doc_width)
4936                         doc_width = width_2;
4937                 if (height_2 > doc_height)
4938                         doc_height = height_2;
4939         }
4940         compute_border (view, doc_width, doc_height, &border);
4941
4942         doc_width = doc_width * 2;
4943         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
4944         height -= (border.top + border.bottom + 2 * view->spacing);
4945
4946         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4947                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
4948         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4949                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
4950         else
4951                 g_assert_not_reached ();
4952
4953         ev_view_set_zoom (view, scale, FALSE);
4954 }
4955
4956 static void
4957 ev_view_zoom_for_size_single_page (EvView *view,
4958                                    int     width,
4959                                    int     height,
4960                                    int     vsb_width,
4961                                    int     hsb_height)
4962 {
4963         int doc_width, doc_height;
4964         GtkBorder border;
4965         gdouble scale;
4966
4967         ev_page_cache_get_size (view->page_cache,
4968                                 view->current_page,
4969                                 view->rotation,
4970                                 1.0,
4971                                 &doc_width,
4972                                 &doc_height);
4973         /* Get an approximate border */
4974         compute_border (view, width, height, &border);
4975
4976         width -= (border.left + border.right + 2 * view->spacing);
4977         height -= (border.top + border.bottom + 2 * view->spacing);
4978
4979         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4980                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
4981         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4982                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
4983         else
4984                 g_assert_not_reached ();
4985
4986         ev_view_set_zoom (view, scale, FALSE);
4987 }
4988
4989 void
4990 ev_view_set_zoom_for_size (EvView *view,
4991                            int     width,
4992                            int     height,
4993                            int     vsb_width,
4994                            int     hsb_height)
4995 {
4996         g_return_if_fail (EV_IS_VIEW (view));
4997         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
4998                           view->sizing_mode == EV_SIZING_BEST_FIT);
4999         g_return_if_fail (width >= 0);
5000         g_return_if_fail (height >= 0);
5001
5002         if (view->document == NULL)
5003                 return;
5004
5005         if (view->presentation)
5006                 ev_view_zoom_for_size_presentation (view, width, height);
5007         else if (view->continuous && view->dual_page)
5008                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
5009         else if (view->continuous)
5010                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
5011         else if (view->dual_page)
5012                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
5013         else
5014                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
5015 }
5016
5017 /*** Find ***/
5018 static gint
5019 ev_view_find_get_n_results (EvView *view, gint page)
5020 {
5021         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5022 }
5023
5024 static EvRectangle *
5025 ev_view_find_get_result (EvView *view, gint page, gint result)
5026 {
5027         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5028 }
5029
5030 static void
5031 jump_to_find_result (EvView *view)
5032 {
5033         gint n_results;
5034         gint page = view->current_page;
5035
5036         n_results = ev_view_find_get_n_results (view, page);
5037
5038         if (n_results > 0 && view->find_result < n_results) {
5039                 EvRectangle *rect;
5040                 GdkRectangle view_rect;
5041
5042                 rect = ev_view_find_get_result (view, page, view->find_result);
5043                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5044                 ensure_rectangle_is_visible (view, &view_rect);
5045                 view->jump_to_find_result = FALSE;
5046         }
5047 }
5048
5049 /**
5050  * jump_to_find_page
5051  * @view: #EvView instance
5052  * @direction: Direction to look
5053  * @shift: Shift from current page
5054  *
5055  * Jumps to the first page that has occurences of searched word.
5056  * Uses a direction where to look and a shift from current page.
5057  *
5058  */
5059 static void
5060 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5061 {
5062         int n_pages, i;
5063
5064         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5065
5066         for (i = 0; i < n_pages; i++) {
5067                 int page;
5068
5069                 if (direction == EV_VIEW_FIND_NEXT)
5070                         page = view->current_page + i;
5071                 else
5072                         page = view->current_page - i;
5073                 page += shift;
5074
5075                 if (page >= n_pages) {
5076                         page = page - n_pages;
5077                 } else if (page < 0)
5078                         page = page + n_pages;
5079
5080                 if (ev_view_find_get_n_results (view, page) > 0) {
5081                         ev_page_cache_set_current_page (view->page_cache, page);
5082                         break;
5083                 }
5084         }
5085 }
5086
5087 void
5088 ev_view_find_changed (EvView *view, GList **results, gint page)
5089 {
5090         view->find_pages = results;
5091
5092         if (view->jump_to_find_result == TRUE) {
5093                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5094                 jump_to_find_result (view);
5095         }
5096
5097         if (view->current_page == page)
5098                 gtk_widget_queue_draw (GTK_WIDGET (view));
5099 }
5100
5101 void
5102 ev_view_find_next (EvView *view)
5103 {
5104         gint n_results;
5105
5106         n_results = ev_view_find_get_n_results (view, view->current_page);
5107         view->find_result++;
5108
5109         if (view->find_result >= n_results) {
5110                 view->find_result = 0;
5111                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5112                 jump_to_find_result (view);
5113         } else {
5114                 jump_to_find_result (view);
5115                 gtk_widget_queue_draw (GTK_WIDGET (view));
5116         }
5117 }
5118
5119 void
5120 ev_view_find_previous (EvView *view)
5121 {
5122         view->find_result--;
5123
5124         if (view->find_result < 0) {
5125                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5126                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5127                 jump_to_find_result (view);
5128         } else {
5129                 jump_to_find_result (view);
5130                 gtk_widget_queue_draw (GTK_WIDGET (view));
5131         }
5132 }
5133
5134 void
5135 ev_view_find_search_changed (EvView *view)
5136 {
5137         /* search string has changed, focus on new search result */
5138         view->jump_to_find_result = TRUE;
5139         view->find_pages = NULL;
5140 }
5141
5142 void
5143 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5144 {
5145         view->highlight_find_results = value;
5146         gtk_widget_queue_draw (GTK_WIDGET (view));
5147 }
5148
5149 void
5150 ev_view_find_cancel (EvView *view)
5151 {
5152         view->find_pages = NULL;
5153 }
5154
5155 /*** Selections ***/
5156
5157 /* compute_new_selection_rect/text calculates the area currently selected by
5158  * view_rect.  each handles a different mode;
5159  */
5160 static GList *
5161 compute_new_selection_rect (EvView       *view,
5162                             GdkPoint     *start,
5163                             GdkPoint     *stop)
5164 {
5165         GdkRectangle view_rect;
5166         int n_pages, i;
5167         GList *list = NULL;
5168
5169         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5170
5171         view_rect.x = MIN (start->x, stop->x);
5172         view_rect.y = MIN (start->y, stop->y);
5173         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5174         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5175
5176         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5177
5178         for (i = 0; i < n_pages; i++) {
5179                 GdkRectangle page_area;
5180                 GtkBorder border;
5181
5182                 if (get_page_extents (view, i, &page_area, &border)) {
5183                         GdkRectangle overlap;
5184
5185                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5186                                 EvViewSelection *selection;
5187
5188                                 selection = g_new0 (EvViewSelection, 1);
5189                                 selection->page = i;
5190                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5191                                                        &(selection->rect));
5192
5193                                 list = g_list_append (list, selection);
5194                         }
5195                 }
5196         }
5197
5198         return list;
5199 }
5200
5201 static gboolean
5202 gdk_rectangle_point_in (GdkRectangle *rectangle,
5203                         GdkPoint     *point)
5204 {
5205         return rectangle->x <= point->x &&
5206                 rectangle->y <= point->y &&
5207                 point->x < rectangle->x + rectangle->width &&
5208                 point->y < rectangle->y + rectangle->height;
5209 }
5210
5211 static GList *
5212 compute_new_selection_text (EvView          *view,
5213                             EvSelectionStyle style,
5214                             GdkPoint        *start,
5215                             GdkPoint        *stop)
5216 {
5217         int n_pages, i, first, last;
5218         GList *list = NULL;
5219         EvViewSelection *selection;
5220         gint width, height;
5221         int start_page, end_page;
5222
5223         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5224
5225         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5226
5227         /* First figure out the range of pages the selection
5228          * affects. */
5229         first = n_pages;
5230         last = 0;
5231         if (view->continuous) {
5232                 start_page = 0;
5233                 end_page = n_pages;
5234         } else if (view->dual_page) {
5235                 start_page = view->start_page;
5236                 end_page = view->end_page + 1;
5237         } else {
5238                 start_page = view->current_page;
5239                 end_page = view->current_page + 1;
5240         }
5241
5242         for (i = start_page; i < end_page; i++) {
5243                 GdkRectangle page_area;
5244                 GtkBorder border;
5245
5246                 get_page_extents (view, i, &page_area, &border);
5247                 if (gdk_rectangle_point_in (&page_area, start) ||
5248                     gdk_rectangle_point_in (&page_area, stop)) {
5249                         if (first == n_pages)
5250                                 first = i;
5251                         last = i;
5252                 }
5253
5254         }
5255
5256         /* Now create a list of EvViewSelection's for the affected
5257          * pages.  This could be an empty list, a list of just one
5258          * page or a number of pages.*/
5259         for (i = first; i < last + 1; i++) {
5260                 GdkRectangle page_area;
5261                 GtkBorder border;
5262                 GdkPoint *point;
5263
5264                 ev_page_cache_get_size (view->page_cache, i,
5265                                         view->rotation,
5266                                         1.0, &width, &height);
5267
5268                 selection = g_new0 (EvViewSelection, 1);
5269                 selection->page = i;
5270                 selection->style = style;
5271                 selection->rect.x1 = selection->rect.y1 = 0;
5272                 selection->rect.x2 = width;
5273                 selection->rect.y2 = height;
5274
5275                 get_page_extents (view, i, &page_area, &border);
5276
5277                 if (gdk_rectangle_point_in (&page_area, start))
5278                         point = start;
5279                 else
5280                         point = stop;
5281
5282                 if (i == first)
5283                         view_point_to_doc_point (view, point, &page_area,
5284                                                  &selection->rect.x1,
5285                                                  &selection->rect.y1);
5286
5287                 /* If the selection is contained within just one page,
5288                  * make sure we don't write 'start' into both points
5289                  * in selection->rect. */
5290                 if (first == last)
5291                         point = stop;
5292
5293                 if (i == last)
5294                         view_point_to_doc_point (view, point, &page_area,
5295                                                  &selection->rect.x2,
5296                                                  &selection->rect.y2);
5297
5298                 list = g_list_append (list, selection);
5299         }
5300
5301         return list;
5302 }
5303
5304 /* This function takes the newly calculated list, and figures out which regions
5305  * have changed.  It then queues a redraw approporiately.
5306  */
5307 static void
5308 merge_selection_region (EvView *view,
5309                         GList  *new_list)
5310 {
5311         GList *old_list;
5312         GList *new_list_ptr, *old_list_ptr;
5313
5314         /* Update the selection */
5315         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5316         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5317         g_list_free (view->selection_info.selections);
5318         view->selection_info.selections = new_list;
5319         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5320         g_object_notify (G_OBJECT (view), "has-selection");
5321
5322         new_list_ptr = new_list;
5323         old_list_ptr = old_list;
5324
5325         while (new_list_ptr || old_list_ptr) {
5326                 EvViewSelection *old_sel, *new_sel;
5327                 int cur_page;
5328                 GdkRegion *region = NULL;
5329
5330                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5331                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5332
5333                 /* Assume that the lists are in order, and we run through them
5334                  * comparing them, one page at a time.  We come out with the
5335                  * first page we see. */
5336                 if (new_sel && old_sel) {
5337                         if (new_sel->page < old_sel->page) {
5338                                 new_list_ptr = new_list_ptr->next;
5339                                 old_sel = NULL;
5340                         } else if (new_sel->page > old_sel->page) {
5341                                 old_list_ptr = old_list_ptr->next;
5342                                 new_sel = NULL;
5343                         } else {
5344                                 new_list_ptr = new_list_ptr->next;
5345                                 old_list_ptr = old_list_ptr->next;
5346                         }
5347                 } else if (new_sel) {
5348                         new_list_ptr = new_list_ptr->next;
5349                 } else if (old_sel) {
5350                         old_list_ptr = old_list_ptr->next;
5351                 }
5352
5353                 g_assert (new_sel || old_sel);
5354
5355                 /* is the page we're looking at on the screen?*/
5356                 cur_page = new_sel ? new_sel->page : old_sel->page;
5357                 if (cur_page < view->start_page || cur_page > view->end_page)
5358                         continue;
5359
5360                 /* seed the cache with a new page.  We are going to need the new
5361                  * region too. */
5362                 if (new_sel) {
5363                         GdkRegion *tmp_region = NULL;
5364
5365                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5366                                                                cur_page,
5367                                                                view->scale,
5368                                                                &tmp_region);
5369
5370                         if (tmp_region) {
5371                                 new_sel->covered_region = gdk_region_copy (tmp_region);
5372                         }
5373                 }
5374
5375                 /* Now we figure out what needs redrawing */
5376                 if (old_sel && new_sel) {
5377                         if (old_sel->covered_region && new_sel->covered_region) {
5378                                 /* We only want to redraw the areas that have
5379                                  * changed, so we xor the old and new regions
5380                                  * and redraw if it's different */
5381                                 region = gdk_region_copy (old_sel->covered_region);
5382                                 gdk_region_xor (region, new_sel->covered_region);
5383                                 if (gdk_region_empty (region)) {
5384                                         gdk_region_destroy (region);
5385                                         region = NULL;
5386                                 }
5387                         } else if (old_sel->covered_region) {
5388                                 region = gdk_region_copy (old_sel->covered_region);
5389                         } else if (new_sel->covered_region) {
5390                                 region = gdk_region_copy (new_sel->covered_region);
5391                         }
5392                 } else if (old_sel && !new_sel) {
5393                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
5394                                 region = gdk_region_copy (old_sel->covered_region);
5395                         }
5396                 } else if (!old_sel && new_sel) {
5397                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
5398                                 region = gdk_region_copy (new_sel->covered_region);
5399                         }
5400                 } else {
5401                         g_assert_not_reached ();
5402                 }
5403
5404                 /* Redraw the damaged region! */
5405                 if (region) {
5406                         GdkRectangle page_area;
5407                         GtkBorder border;
5408
5409                         /* I don't know why but the region is smaller
5410                          * than expected. This hack fixes it, I guess
5411                          * 10 pixels more won't hurt
5412                          */
5413                         gdk_region_shrink (region, -5, -5);
5414
5415                         get_page_extents (view, cur_page, &page_area, &border);
5416                         gdk_region_offset (region,
5417                                            page_area.x + border.left - view->scroll_x,
5418                                            page_area.y + border.top - view->scroll_y);
5419                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
5420                         gdk_region_destroy (region);
5421                 }
5422         }
5423
5424         /* Free the old list, now that we're done with it. */
5425         g_list_foreach (old_list, (GFunc) selection_free, NULL);
5426         g_list_free (old_list);
5427 }
5428
5429 static void
5430 compute_selections (EvView          *view,
5431                     EvSelectionStyle style,
5432                     GdkPoint        *start,
5433                     GdkPoint        *stop)
5434 {
5435         GList *list;
5436
5437         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
5438                 list = compute_new_selection_rect (view, start, stop);
5439         else
5440                 list = compute_new_selection_text (view, style, start, stop);
5441         merge_selection_region (view, list);
5442 }
5443
5444 /* Free's the selection.  It's up to the caller to queue redraws if needed.
5445  */
5446 static void
5447 selection_free (EvViewSelection *selection)
5448 {
5449         if (selection->covered_region)
5450                 gdk_region_destroy (selection->covered_region);
5451         g_free (selection);
5452 }
5453
5454 static void
5455 clear_selection (EvView *view)
5456 {
5457         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5458         g_list_free (view->selection_info.selections);
5459         view->selection_info.selections = NULL;
5460         view->selection_info.in_selection = FALSE;
5461         if (view->pixbuf_cache)
5462                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
5463         g_object_notify (G_OBJECT (view), "has-selection");
5464 }
5465
5466 void
5467 ev_view_select_all (EvView *view)
5468 {
5469         GList *selections = NULL;
5470         int n_pages, i;
5471
5472         /* Disable selection on rotated pages for the 0.4.0 series */
5473         if (view->rotation != 0)
5474                 return;
5475
5476         clear_selection (view);
5477
5478         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5479         for (i = 0; i < n_pages; i++) {
5480                 int width, height;
5481                 EvViewSelection *selection;
5482
5483                 ev_page_cache_get_size (view->page_cache,
5484                                         i,
5485                                         view->rotation,
5486                                         1.0, &width, &height);
5487
5488                 selection = g_new0 (EvViewSelection, 1);
5489                 selection->page = i;
5490                 selection->style = EV_SELECTION_STYLE_GLYPH;
5491                 selection->rect.x1 = selection->rect.y1 = 0;
5492                 selection->rect.x2 = width;
5493                 selection->rect.y2 = height;
5494
5495                 selections = g_list_append (selections, selection);
5496         }
5497
5498         merge_selection_region (view, selections);
5499         gtk_widget_queue_draw (GTK_WIDGET (view));
5500 }
5501
5502 gboolean
5503 ev_view_get_has_selection (EvView *view)
5504 {
5505         return view->selection_info.selections != NULL;
5506 }
5507
5508 static char *
5509 get_selected_text (EvView *view)
5510 {
5511         GString *text;
5512         GList *l;
5513         gchar *normalized_text;
5514         EvRenderContext *rc;
5515
5516         text = g_string_new (NULL);
5517         rc = ev_render_context_new (NULL, view->rotation, view->scale);
5518
5519         ev_document_doc_mutex_lock ();
5520
5521         for (l = view->selection_info.selections; l != NULL; l = l->next) {
5522                 EvViewSelection *selection = (EvViewSelection *)l->data;
5523                 EvPage *page;
5524                 gchar *tmp;
5525
5526                 page = ev_document_get_page (view->document, selection->page);
5527                 ev_render_context_set_page (rc, page);
5528                 g_object_unref (page);
5529
5530                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
5531                                                       rc, selection->style,
5532                                                       &(selection->rect));
5533
5534                 g_string_append (text, tmp);
5535                 g_free (tmp);
5536         }
5537
5538         g_object_unref (rc);
5539
5540         ev_document_doc_mutex_unlock ();
5541
5542         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
5543         g_string_free (text, TRUE);
5544         return normalized_text;
5545 }
5546
5547 static void
5548 ev_view_clipboard_copy (EvView      *view,
5549                         const gchar *text)
5550 {
5551         GtkClipboard *clipboard;
5552
5553         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
5554                                               GDK_SELECTION_CLIPBOARD);
5555         gtk_clipboard_set_text (clipboard, text, -1);
5556 }
5557
5558 void
5559 ev_view_copy (EvView *ev_view)
5560 {
5561         char *text;
5562
5563         if (!EV_IS_SELECTION (ev_view->document))
5564                 return;
5565
5566         text = get_selected_text (ev_view);
5567         ev_view_clipboard_copy (ev_view, text);
5568         g_free (text);
5569 }
5570
5571 static void
5572 ev_view_primary_get_cb (GtkClipboard     *clipboard,
5573                         GtkSelectionData *selection_data,
5574                         guint             info,
5575                         gpointer          data)
5576 {
5577         EvView *ev_view = EV_VIEW (data);
5578
5579         if (ev_view->link_selected) {
5580                 gtk_selection_data_set_text (selection_data,
5581                                              ev_link_action_get_uri (ev_view->link_selected),
5582                                              -1);
5583         } else if (EV_IS_SELECTION (ev_view->document) &&
5584                    ev_view->selection_info.selections) {
5585                 gchar *text;
5586
5587                 text = get_selected_text (ev_view);
5588                 if (text) {
5589                         gtk_selection_data_set_text (selection_data, text, -1);
5590                         g_free (text);
5591                 }
5592         }
5593 }
5594
5595 static void
5596 ev_view_primary_clear_cb (GtkClipboard *clipboard,
5597                           gpointer      data)
5598 {
5599         EvView *view = EV_VIEW (data);
5600
5601         clear_selection (view);
5602         clear_link_selected (view);
5603 }
5604
5605 static void
5606 ev_view_update_primary_selection (EvView *ev_view)
5607 {
5608         GtkClipboard *clipboard;
5609
5610         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
5611                                               GDK_SELECTION_PRIMARY);
5612
5613         if (ev_view->selection_info.selections || ev_view->link_selected) {
5614                 GtkTargetList *target_list;
5615                 GtkTargetEntry *targets;
5616                 int n_targets;
5617
5618                 target_list = gtk_target_list_new (NULL, 0);
5619                 gtk_target_list_add_text_targets (target_list, 0);
5620                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
5621                 gtk_target_list_unref (target_list);
5622
5623                 if (!gtk_clipboard_set_with_owner (clipboard,
5624                                                    targets, n_targets,
5625                                                    ev_view_primary_get_cb,
5626                                                    ev_view_primary_clear_cb,
5627                                                    G_OBJECT (ev_view)))
5628                         ev_view_primary_clear_cb (clipboard, ev_view);
5629
5630                 gtk_target_table_free (targets, n_targets);
5631         } else {
5632                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
5633                         gtk_clipboard_clear (clipboard);
5634         }
5635 }
5636
5637 static void
5638 clear_link_selected (EvView *view)
5639 {
5640         if (view->link_selected) {
5641                 g_object_unref (view->link_selected);
5642                 view->link_selected = NULL;
5643         }
5644 }
5645
5646 void
5647 ev_view_copy_link_address (EvView       *view,
5648                            EvLinkAction *action)
5649 {
5650         clear_link_selected (view);
5651
5652         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
5653
5654         view->link_selected = g_object_ref (action);
5655         ev_view_update_primary_selection (view);
5656 }
5657
5658 /*** Cursor operations ***/
5659
5660 static GdkCursor *
5661 ev_view_create_invisible_cursor(void)
5662 {
5663        GdkBitmap *empty;
5664        GdkColor black = { 0, 0, 0, 0 };
5665        static char bits[] = { 0x00 };
5666
5667        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
5668
5669        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
5670 }
5671
5672 static void
5673 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
5674 {
5675         GdkCursor *cursor = NULL;
5676         GdkDisplay *display;
5677         GtkWidget *widget;
5678
5679         if (view->cursor == new_cursor) {
5680                 return;
5681         }
5682
5683         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
5684         display = gtk_widget_get_display (widget);
5685         view->cursor = new_cursor;
5686
5687         switch (new_cursor) {
5688                 case EV_VIEW_CURSOR_NORMAL:
5689                         gdk_window_set_cursor (view->layout.bin_window, NULL);
5690                         break;
5691                 case EV_VIEW_CURSOR_IBEAM:
5692                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
5693                         break;
5694                 case EV_VIEW_CURSOR_LINK:
5695                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
5696                         break;
5697                 case EV_VIEW_CURSOR_WAIT:
5698                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
5699                         break;
5700                 case EV_VIEW_CURSOR_HIDDEN:
5701                         cursor = ev_view_create_invisible_cursor ();
5702                         break;
5703                 case EV_VIEW_CURSOR_DRAG:
5704                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
5705                         break;
5706                 case EV_VIEW_CURSOR_AUTOSCROLL:
5707                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
5708                         break;
5709         }
5710
5711         if (cursor) {
5712                 gdk_window_set_cursor (view->layout.bin_window, cursor);
5713                 gdk_cursor_unref (cursor);
5714                 gdk_flush();
5715         }
5716 }
5717
5718 void
5719 ev_view_hide_cursor (EvView *view)
5720 {
5721        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
5722 }
5723
5724 void
5725 ev_view_show_cursor (EvView *view)
5726 {
5727        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
5728 }
5729
5730 static void
5731 ev_view_reset_presentation_state (EvView *view)
5732 {
5733         if (!view->presentation ||
5734             view->presentation_state == EV_PRESENTATION_NORMAL)
5735                 return;
5736
5737         view->presentation_state = EV_PRESENTATION_NORMAL;
5738         gdk_window_set_background (view->layout.bin_window,
5739                                    &GTK_WIDGET (view)->style->black);
5740         gtk_widget_queue_draw (GTK_WIDGET (view));
5741 }
5742
5743 gboolean
5744 ev_view_next_page (EvView *view)
5745 {
5746         int page, n_pages;
5747
5748         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5749
5750         if (!view->page_cache)
5751                 return FALSE;
5752
5753         if (view->presentation &&
5754             (view->presentation_state == EV_PRESENTATION_BLACK ||
5755              view->presentation_state == EV_PRESENTATION_WHITE)) {
5756                 ev_view_reset_presentation_state (view);
5757                 return FALSE;
5758         }
5759
5760         if (view->animation) {
5761                 ev_view_transition_animation_cancel (view->animation, view);
5762         }
5763
5764         ev_view_presentation_transition_stop (view);
5765         ev_view_reset_presentation_state (view);
5766
5767         page = ev_page_cache_get_current_page (view->page_cache);
5768         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5769
5770         if (view->dual_page && !view->presentation)
5771                 page = page + 2;
5772         else
5773                 page = page + 1;
5774
5775         if (page < n_pages) {
5776                 ev_page_cache_set_current_page (view->page_cache, page);
5777                 return TRUE;
5778         } else if (view->presentation && page == n_pages) {
5779                 view->presentation_state = EV_PRESENTATION_END;
5780                 gtk_widget_queue_draw (GTK_WIDGET (view));
5781                 return TRUE;
5782         } else if (view->dual_page && page == n_pages) {
5783                 ev_page_cache_set_current_page (view->page_cache, page - 1);
5784                 return TRUE;
5785         } else {
5786                 return FALSE;
5787         }
5788 }
5789
5790 gboolean
5791 ev_view_previous_page (EvView *view)
5792 {
5793         int page;
5794
5795         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5796
5797         if (!view->page_cache)
5798                 return FALSE;
5799
5800         if (view->presentation &&
5801             view->presentation_state == EV_PRESENTATION_END) {
5802                 ev_view_reset_presentation_state (view);
5803                 return TRUE;
5804         }
5805
5806         if (view->presentation &&
5807             (view->presentation_state == EV_PRESENTATION_BLACK ||
5808              view->presentation_state == EV_PRESENTATION_WHITE)) {
5809                 ev_view_reset_presentation_state (view);
5810                 return FALSE;
5811         }
5812
5813         if (view->animation) {
5814                 ev_view_transition_animation_cancel (view->animation, view);
5815         }
5816
5817         ev_view_reset_presentation_state (view);
5818
5819         page = ev_page_cache_get_current_page (view->page_cache);
5820
5821         if (view->dual_page && !view->presentation)
5822                 page = page - 2;
5823         else
5824                 page = page - 1;
5825
5826         if (page >= 0) {
5827                 ev_page_cache_set_current_page (view->page_cache, page);
5828                 return TRUE;
5829         } else if (ev_view_get_dual_page (view) && page == -1) {
5830                 ev_page_cache_set_current_page (view->page_cache, 0);
5831                 return TRUE;
5832         } else {
5833                 return FALSE;
5834         }
5835 }
5836
5837 /*** Enum description for usage in signal ***/
5838
5839 void
5840 ev_view_update_view_size (EvView *view, GtkScrolledWindow * scrolled_window)
5841 {
5842         int width, height;
5843         GtkRequisition vsb_requisition;
5844         GtkRequisition hsb_requisition;
5845         int scrollbar_spacing;
5846
5847         /* Calculate the width available for the content */
5848         width  = GTK_WIDGET (scrolled_window)->allocation.width;
5849         height = GTK_WIDGET (scrolled_window)->allocation.height;
5850
5851         if (gtk_scrolled_window_get_shadow_type (scrolled_window) == GTK_SHADOW_IN
5852             && view) {
5853                 width -=  2 * GTK_WIDGET(view)->style->xthickness;
5854                 height -= 2 * GTK_WIDGET(view)->style->ythickness;
5855         }
5856
5857         gtk_widget_size_request (scrolled_window->vscrollbar, &vsb_requisition);
5858         gtk_widget_size_request (scrolled_window->hscrollbar, &hsb_requisition);
5859         gtk_widget_style_get (GTK_WIDGET (scrolled_window),
5860                               "scrollbar_spacing",
5861                               &scrollbar_spacing,
5862                               NULL);
5863
5864         if (EV_IS_VIEW(view)) {
5865                 ev_view_set_zoom_for_size (EV_VIEW (view),
5866                                            MAX (1, width),
5867                                            MAX (1, height),
5868                                            vsb_requisition.width + scrollbar_spacing,
5869                                            hsb_requisition.height + scrollbar_spacing);
5870         }
5871 }