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                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
2222                 ev_view_size_request (widget, &widget->requisition);
2223         }
2224
2225         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2226         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2227
2228         if (view->document)
2229                 view_update_range_and_current_page (view);
2230
2231         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2232         view->pending_resize = FALSE;
2233
2234         children = gtk_container_get_children (GTK_CONTAINER (widget));
2235         for (l = children; l && l->data; l = g_list_next (l)) {
2236                 EvFormField   *field;
2237                 EvRectangle    field_area;
2238                 GdkRectangle   view_area;
2239                 GList         *form_field_mapping;
2240                 GtkAllocation  child_allocation;
2241                 GtkRequisition child_requisition;
2242                 GtkWidget     *child = (GtkWidget *)l->data;
2243
2244                 field = g_object_get_data (G_OBJECT (child), "form-field");
2245                 if (!field)
2246                         continue;
2247
2248                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2249                                                                              field->page->index);
2250                 ev_form_field_mapping_get_area (form_field_mapping, field, &field_area);
2251
2252                 doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
2253                 view_area.x -= view->scroll_x;
2254                 view_area.y -= view->scroll_y;
2255
2256                 gtk_widget_size_request (child, &child_requisition);
2257                 if (child_requisition.width != view_area.width ||
2258                     child_requisition.height != view_area.height)
2259                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2260
2261                 gtk_container_child_get (GTK_CONTAINER (widget),
2262                                          child,
2263                                          "x", &child_allocation.x,
2264                                          "y", &child_allocation.y,
2265                                          NULL);
2266                 if (child_allocation.x != view_area.x ||
2267                     child_allocation.y != view_area.y) {
2268                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2269                 }
2270         }
2271         g_list_free (children);
2272 }
2273
2274 static void
2275 ev_view_realize (GtkWidget *widget)
2276 {
2277         EvView *view = EV_VIEW (widget);
2278
2279         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
2280                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
2281
2282         gdk_window_set_events (view->layout.bin_window,
2283                                (gdk_window_get_events (view->layout.bin_window) |
2284                                 GDK_EXPOSURE_MASK |
2285                                 GDK_BUTTON_PRESS_MASK |
2286                                 GDK_BUTTON_RELEASE_MASK |
2287                                 GDK_SCROLL_MASK |
2288                                 GDK_KEY_PRESS_MASK |
2289                                 GDK_POINTER_MOTION_MASK |
2290                                 GDK_POINTER_MOTION_HINT_MASK |
2291                                 GDK_ENTER_NOTIFY_MASK |
2292                                 GDK_LEAVE_NOTIFY_MASK));
2293
2294         if (view->presentation)
2295                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
2296         else
2297                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
2298 }
2299
2300 static gboolean
2301 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
2302 {
2303         EvView *view = EV_VIEW (widget);
2304         guint state;
2305
2306         state = event->state & gtk_accelerator_get_default_mod_mask ();
2307
2308         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
2309                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
2310
2311                 if (event->direction == GDK_SCROLL_UP ||
2312                     event->direction == GDK_SCROLL_LEFT) {
2313                         if (ev_view_can_zoom_in (view)) {
2314                                 ev_view_zoom_in (view);
2315                         }
2316                 } else {
2317                         if (ev_view_can_zoom_out (view)) {
2318                                 ev_view_zoom_out (view);
2319                         }
2320                 }
2321
2322                 return TRUE;
2323         }
2324
2325         view->jump_to_find_result = FALSE;
2326
2327         /* Shift+Wheel scrolls the in the perpendicular direction */
2328         if (state & GDK_SHIFT_MASK) {
2329                 if (event->direction == GDK_SCROLL_UP)
2330                         event->direction = GDK_SCROLL_LEFT;
2331                 else if (event->direction == GDK_SCROLL_LEFT)
2332                         event->direction = GDK_SCROLL_UP;
2333                 else if (event->direction == GDK_SCROLL_DOWN)
2334                         event->direction = GDK_SCROLL_RIGHT;
2335                 else if (event->direction == GDK_SCROLL_RIGHT)
2336                         event->direction = GDK_SCROLL_DOWN;
2337
2338                 event->state &= ~GDK_SHIFT_MASK;
2339                 state &= ~GDK_SHIFT_MASK;
2340         }
2341
2342         if (state == 0 && view->presentation) {
2343                 switch (event->direction) {
2344                         case GDK_SCROLL_DOWN:
2345                         case GDK_SCROLL_RIGHT:
2346                                 ev_view_next_page (view);
2347                                 break;
2348                         case GDK_SCROLL_UP:
2349                         case GDK_SCROLL_LEFT:
2350                                 ev_view_previous_page (view);
2351                                 break;
2352                 }
2353
2354                 return TRUE;
2355         }
2356
2357         return FALSE;
2358 }
2359
2360 static EvViewSelection *
2361 find_selection_for_page (EvView *view,
2362                          gint    page)
2363 {
2364         GList *list;
2365
2366         for (list = view->selection_info.selections; list != NULL; list = list->next) {
2367                 EvViewSelection *selection;
2368
2369                 selection = (EvViewSelection *) list->data;
2370
2371                 if (selection->page == page)
2372                         return selection;
2373         }
2374
2375         return NULL;
2376 }
2377
2378 static void
2379 draw_end_presentation_page (EvView       *view,
2380                             GdkRectangle *page_area)
2381 {
2382         PangoLayout *layout;
2383         PangoFontDescription *font_desc;
2384         gchar *markup;
2385         const gchar *text = _("End of presentation. Press Escape to exit.");
2386
2387         if (view->presentation_state != EV_PRESENTATION_END)
2388                 return;
2389
2390         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
2391         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
2392         pango_layout_set_markup (layout, markup, -1);
2393         g_free (markup);
2394
2395         font_desc = pango_font_description_new ();
2396         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
2397         pango_layout_set_font_description (layout, font_desc);
2398
2399         gtk_paint_layout (GTK_WIDGET (view)->style,
2400                           view->layout.bin_window,
2401                           GTK_WIDGET_STATE (view),
2402                           FALSE,
2403                           page_area,
2404                           GTK_WIDGET (view),
2405                           NULL,
2406                           page_area->x + 15,
2407                           page_area->y + 15,
2408                           layout);
2409
2410         pango_font_description_free (font_desc);
2411         g_object_unref (layout);
2412 }
2413
2414 static gboolean
2415 ev_view_expose_event (GtkWidget      *widget,
2416                       GdkEventExpose *event)
2417 {
2418         EvView  *view = EV_VIEW (widget);
2419         cairo_t *cr;
2420         gint     i;
2421
2422         if (view->animation) {
2423                 if (ev_transition_animation_ready (view->animation)) {
2424                         GdkRectangle page_area;
2425                         GtkBorder    border;
2426
2427                         if (get_page_extents (view, view->current_page, &page_area, &border)) {
2428                                 cr = gdk_cairo_create (view->layout.bin_window);
2429
2430                                 /* normalize to x=0, y=0 */
2431                                 cairo_translate (cr, page_area.x, page_area.y);
2432                                 page_area.x = page_area.y = 0;
2433
2434                                 ev_transition_animation_paint (view->animation, cr, page_area);
2435                                 cairo_destroy (cr);
2436                         }
2437                 }
2438
2439                 return TRUE;
2440         }
2441
2442         if (view->presentation) {
2443                 switch (view->presentation_state) {
2444                         case EV_PRESENTATION_END: {
2445                                 GdkRectangle area = {0};
2446
2447                                 area.width = widget->allocation.width;
2448                                 area.height = widget->allocation.height;
2449
2450                                 draw_end_presentation_page (view, &area);
2451                         }
2452                                 return FALSE;
2453                         case EV_PRESENTATION_BLACK:
2454                         case EV_PRESENTATION_WHITE:
2455                                 return FALSE;
2456                         case EV_PRESENTATION_NORMAL:
2457                         default:
2458                                 break;
2459                 }
2460         } else if (view->loading) {
2461                 GdkRectangle area = {0};
2462
2463                 area.width = widget->allocation.width;
2464                 area.height = widget->allocation.height;
2465
2466                 draw_loading_text (view,
2467                                    &area,
2468                                    &(event->area));
2469         }
2470
2471         if (view->document == NULL)
2472                 return FALSE;
2473
2474         cr = gdk_cairo_create (view->layout.bin_window);
2475
2476         for (i = view->start_page; i <= view->end_page; i++) {
2477                 GdkRectangle page_area;
2478                 GtkBorder border;
2479                 gboolean page_ready = TRUE;
2480
2481                 if (!get_page_extents (view, i, &page_area, &border))
2482                         continue;
2483
2484                 page_area.x -= view->scroll_x;
2485                 page_area.y -= view->scroll_y;
2486
2487                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
2488
2489                 if (page_ready && view->find_pages && view->highlight_find_results)
2490                         highlight_find_results (view, i);
2491         }
2492
2493         cairo_destroy (cr);
2494
2495         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
2496                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
2497
2498         return FALSE;
2499 }
2500
2501 static gboolean
2502 ev_view_do_popup_menu (EvView *view,
2503                        gdouble x,
2504                        gdouble y)
2505 {
2506         EvLink  *link;
2507         EvImage *image;
2508
2509         image = ev_view_get_image_at_location (view, x, y);
2510         if (image) {
2511                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
2512                 return TRUE;
2513         }
2514
2515         link = ev_view_get_link_at_location (view, x, y);
2516         if (link) {
2517                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
2518                 return TRUE;
2519         }
2520
2521         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
2522
2523         return TRUE;
2524 }
2525
2526 static gboolean
2527 ev_view_popup_menu (GtkWidget *widget)
2528 {
2529         gint x, y;
2530
2531         gtk_widget_get_pointer (widget, &x, &y);
2532         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
2533 }
2534
2535 static void
2536 get_link_area (EvView       *view,
2537                gint          x,
2538                gint          y,
2539                EvLink       *link,
2540                GdkRectangle *area)
2541 {
2542         EvRectangle  ev_rect;
2543         GList       *link_mapping;
2544         gint         page;
2545         gint         x_offset = 0, y_offset = 0;
2546
2547         x += view->scroll_x;
2548         y += view->scroll_y;
2549
2550         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
2551
2552         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
2553         ev_link_mapping_get_area (link_mapping, link, &ev_rect);
2554
2555         doc_rect_to_view_rect (view, page, &ev_rect, area);
2556         area->y -= view->scroll_y ;
2557 }
2558
2559 static gboolean
2560 ev_view_query_tooltip (GtkWidget         *widget,
2561                        gint               x,
2562                        gint               y,
2563                        gboolean           keyboard_tip,
2564                        GtkTooltip        *tooltip)
2565 {
2566         EvView *view = EV_VIEW (widget);
2567         EvLink *link;
2568         gchar  *text;
2569
2570         link = ev_view_get_link_at_location (view, x, y);
2571         if (!link)
2572                 return FALSE;
2573
2574         text = tip_from_link (view, link);
2575         if (text && g_utf8_validate (text, -1, NULL)) {
2576                 GdkRectangle link_area;
2577
2578                 get_link_area (view, x, y, link, &link_area);
2579                 gtk_tooltip_set_text (tooltip, text);
2580                 gtk_tooltip_set_tip_area (tooltip, &link_area);
2581         }
2582         g_free (text);
2583
2584         return TRUE;
2585 }
2586
2587 static void
2588 start_selection_for_event (EvView         *view,
2589                            GdkEventButton *event)
2590 {
2591         EvSelectionStyle style;
2592
2593         clear_selection (view);
2594
2595         view->selection_info.start.x = event->x + view->scroll_x;
2596         view->selection_info.start.y = event->y + view->scroll_y;
2597
2598         switch (event->type) {
2599                 case GDK_2BUTTON_PRESS:
2600                         style = EV_SELECTION_STYLE_WORD;
2601                         break;
2602                 case GDK_3BUTTON_PRESS:
2603                         style = EV_SELECTION_STYLE_LINE;
2604                         break;
2605                 default:
2606                         style = EV_SELECTION_STYLE_GLYPH;
2607                         break;
2608         }
2609
2610         view->selection_info.style = style;
2611 }
2612
2613 static gboolean
2614 ev_view_button_press_event (GtkWidget      *widget,
2615                             GdkEventButton *event)
2616 {
2617         EvView *view = EV_VIEW (widget);
2618
2619         if (!view->document)
2620                 return FALSE;
2621
2622         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
2623                 gtk_widget_grab_focus (widget);
2624         }
2625
2626         view->pressed_button = event->button;
2627         view->selection_info.in_drag = FALSE;
2628
2629         if (view->scroll_info.autoscrolling)
2630                 return TRUE;
2631
2632         switch (event->button) {
2633                 case 1: {
2634                         EvImage *image;
2635                         EvFormField *field;
2636
2637                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
2638                                 if (event->type == GDK_3BUTTON_PRESS) {
2639                                         start_selection_for_event (view, event);
2640                                 } else if (location_in_selected_text (view,
2641                                                                event->x + view->scroll_x,
2642                                                                event->y + view->scroll_y)) {
2643                                         view->selection_info.in_drag = TRUE;
2644                                 } else {
2645                                         start_selection_for_event (view, event);
2646                                 }
2647
2648                                 gtk_widget_queue_draw (widget);
2649                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
2650                                 ev_view_remove_all (view);
2651                                 ev_view_handle_form_field (view, field, event->x, event->y);
2652                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
2653                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
2654                                 if (view->image_dnd_info.image)
2655                                         g_object_unref (view->image_dnd_info.image);
2656                                 view->image_dnd_info.image = g_object_ref (image);
2657                                 view->image_dnd_info.in_drag = TRUE;
2658
2659                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
2660                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
2661                         } else {
2662                                 ev_view_remove_all (view);
2663
2664                                 if (EV_IS_SELECTION (view->document))
2665                                         start_selection_for_event (view, event);
2666                         }
2667                 }
2668                         return TRUE;
2669                 case 2:
2670                         /* use root coordinates as reference point because
2671                          * scrolling changes window relative coordinates */
2672                         view->drag_info.start.x = event->x_root;
2673                         view->drag_info.start.y = event->y_root;
2674                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
2675                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
2676
2677                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
2678
2679                         return TRUE;
2680                 case 3:
2681                         view->scroll_info.start_y = event->y;
2682                         return ev_view_do_popup_menu (view, event->x, event->y);
2683         }
2684
2685         return FALSE;
2686 }
2687
2688 static void
2689 ev_view_remove_all (EvView *view)
2690 {
2691         GList *children, *child;
2692
2693         children = gtk_container_get_children (GTK_CONTAINER (view));
2694         for (child = children; child && child->data; child = g_list_next (child)) {
2695                 gtk_container_remove (GTK_CONTAINER (view),
2696                                       GTK_WIDGET (child->data));
2697         }
2698         g_list_free (children);
2699 }
2700
2701 /*** Drag and Drop ***/
2702 static void
2703 ev_view_drag_data_get (GtkWidget        *widget,
2704                        GdkDragContext   *context,
2705                        GtkSelectionData *selection_data,
2706                        guint             info,
2707                        guint             time)
2708 {
2709         EvView *view = EV_VIEW (widget);
2710
2711         switch (info) {
2712                 case TARGET_DND_TEXT:
2713                         if (EV_IS_SELECTION (view->document) &&
2714                             view->selection_info.selections) {
2715                                 gchar *text;
2716
2717                                 text = get_selected_text (view);
2718                                 gtk_selection_data_set_text (selection_data,
2719                                                              text,
2720                                                              strlen (text));
2721                                 g_free (text);
2722                         }
2723                         break;
2724                 case TARGET_DND_IMAGE:
2725                         if (view->image_dnd_info.image) {
2726                                 GdkPixbuf *pixbuf;
2727
2728                                 ev_document_doc_mutex_lock ();
2729                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
2730                                                                        view->image_dnd_info.image);
2731                                 ev_document_doc_mutex_unlock ();
2732
2733                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
2734                                 g_object_unref (pixbuf);
2735                         }
2736                         break;
2737                 case TARGET_DND_URI:
2738                         if (view->image_dnd_info.image) {
2739                                 GdkPixbuf   *pixbuf;
2740                                 const gchar *tmp_uri;
2741                                 gchar       *uris[2];
2742
2743                                 ev_document_doc_mutex_lock ();
2744                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
2745                                                                        view->image_dnd_info.image);
2746                                 ev_document_doc_mutex_unlock ();
2747
2748                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
2749                                 g_object_unref (pixbuf);
2750
2751                                 uris[0] = (gchar *)tmp_uri;
2752                                 uris[1] = NULL;
2753                                 gtk_selection_data_set_uris (selection_data, uris);
2754                         }
2755         }
2756 }
2757
2758 static gboolean
2759 ev_view_drag_motion (GtkWidget      *widget,
2760                      GdkDragContext *context,
2761                      gint            x,
2762                      gint            y,
2763                      guint           time)
2764 {
2765         if (gtk_drag_get_source_widget (context) == widget)
2766                 gdk_drag_status (context, 0, time);
2767         else
2768                 gdk_drag_status (context, context->suggested_action, time);
2769
2770         return TRUE;
2771 }
2772
2773 static gboolean
2774 selection_update_idle_cb (EvView *view)
2775 {
2776         compute_selections (view,
2777                             view->selection_info.style,
2778                             &view->selection_info.start,
2779                             &view->motion);
2780         view->selection_update_id = 0;
2781         return FALSE;
2782 }
2783
2784 static gboolean
2785 selection_scroll_timeout_cb (EvView *view)
2786 {
2787         gint x, y, shift = 0;
2788         GtkWidget *widget = GTK_WIDGET (view);
2789
2790         gtk_widget_get_pointer (widget, &x, &y);
2791
2792         if (y > widget->allocation.height) {
2793                 shift = (y - widget->allocation.height) / 2;
2794         } else if (y < 0) {
2795                 shift = y / 2;
2796         }
2797
2798         if (shift)
2799                 gtk_adjustment_set_value (view->vadjustment,
2800                                           CLAMP (view->vadjustment->value + shift,
2801                                           view->vadjustment->lower,
2802                                           view->vadjustment->upper -
2803                                           view->vadjustment->page_size));
2804
2805         if (x > widget->allocation.width) {
2806                 shift = (x - widget->allocation.width) / 2;
2807         } else if (x < 0) {
2808                 shift = x / 2;
2809         }
2810
2811         if (shift)
2812                 gtk_adjustment_set_value (view->hadjustment,
2813                                           CLAMP (view->hadjustment->value + shift,
2814                                           view->hadjustment->lower,
2815                                           view->hadjustment->upper -
2816                                           view->hadjustment->page_size));
2817
2818         return TRUE;
2819 }
2820
2821 static gboolean
2822 ev_view_drag_update_momentum (EvView *view)
2823 {
2824         int i;
2825         if (!view->drag_info.in_drag)
2826                 return FALSE;
2827
2828         for (i = DRAG_HISTORY - 1; i > 0; i--) {
2829                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
2830                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
2831         }
2832
2833         /* Momentum is a moving average of 10ms granularity over
2834          * the last 100ms with each 10ms stored in buffer.
2835          */
2836
2837         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
2838         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
2839
2840         return TRUE;
2841 }
2842
2843 static gboolean
2844 ev_view_scroll_drag_release (EvView *view)
2845 {
2846         gdouble dhadj_value, dvadj_value;
2847         gdouble oldhadjustment, oldvadjustment;
2848
2849         view->drag_info.momentum.x /= 1.2;
2850         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
2851
2852         dhadj_value = view->hadjustment->page_size *
2853                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
2854         dvadj_value = view->vadjustment->page_size *
2855                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
2856
2857         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
2858         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
2859
2860      /* When we reach the edges, we need either to absorb some momentum and bounce by
2861       * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
2862      if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
2863            ((oldhadjustment + dhadj_value) < 0))
2864                 view->drag_info.momentum.x = 0;
2865         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
2866            ((oldvadjustment + dvadj_value) < 0))
2867                 view->drag_info.momentum.y = 0;
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 (scale == view->scale)
4445                 return;
4446
4447         if (ABS (view->scale - scale) < EPSILON)
4448                 return;
4449
4450         if (view->loading_text) {
4451                 cairo_surface_destroy (view->loading_text);
4452                 view->loading_text = NULL;
4453         }
4454
4455         view->scale = scale;
4456         view->pending_resize = TRUE;
4457
4458         gtk_widget_queue_resize (GTK_WIDGET (view));
4459
4460         g_object_notify (G_OBJECT (view), "zoom");
4461 }
4462
4463 double
4464 ev_view_get_zoom (EvView *view)
4465 {
4466         return view->scale;
4467 }
4468
4469 void
4470 ev_view_set_screen_dpi (EvView  *view,
4471                         gdouble  dpi)
4472 {
4473         g_return_if_fail (EV_IS_VIEW (view));
4474         g_return_if_fail (dpi > 0);
4475
4476         view->dpi = dpi;
4477         view->min_scale = MIN_SCALE * dpi / 72.0;
4478         view->max_scale = MAX_SCALE * dpi / 72.0;
4479 }
4480
4481 gboolean
4482 ev_view_get_continuous (EvView *view)
4483 {
4484         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4485
4486         return view->continuous;
4487 }
4488
4489 void
4490 ev_view_set_continuous (EvView   *view,
4491                         gboolean  continuous)
4492 {
4493         g_return_if_fail (EV_IS_VIEW (view));
4494
4495         continuous = continuous != FALSE;
4496
4497         if (view->continuous != continuous) {
4498                 view->continuous = continuous;
4499                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4500                 gtk_widget_queue_resize (GTK_WIDGET (view));
4501         }
4502
4503         g_object_notify (G_OBJECT (view), "continuous");
4504 }
4505
4506 gboolean
4507 ev_view_get_dual_page (EvView *view)
4508 {
4509         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4510
4511         return view->dual_page;
4512 }
4513
4514 void
4515 ev_view_set_dual_page (EvView   *view,
4516                        gboolean  dual_page)
4517 {
4518         g_return_if_fail (EV_IS_VIEW (view));
4519
4520         dual_page = dual_page != FALSE;
4521
4522         if (view->dual_page == dual_page)
4523                 return;
4524
4525         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4526         view->dual_page = dual_page;
4527         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
4528          * preload_cache_size to be 2 if dual_page is set.
4529          */
4530         gtk_widget_queue_resize (GTK_WIDGET (view));
4531
4532         g_object_notify (G_OBJECT (view), "dual-page");
4533 }
4534
4535 void
4536 ev_view_set_fullscreen (EvView   *view,
4537                          gboolean  fullscreen)
4538 {
4539         g_return_if_fail (EV_IS_VIEW (view));
4540
4541         fullscreen = fullscreen != FALSE;
4542
4543         if (view->fullscreen == fullscreen)
4544                 return;
4545
4546         view->fullscreen = fullscreen;
4547         gtk_widget_queue_resize (GTK_WIDGET (view));
4548
4549         g_object_notify (G_OBJECT (view), "fullscreen");
4550 }
4551
4552 gboolean
4553 ev_view_get_fullscreen (EvView *view)
4554 {
4555         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4556
4557         return view->fullscreen;
4558 }
4559
4560 void
4561 ev_view_set_presentation (EvView   *view,
4562                           gboolean  presentation)
4563 {
4564         g_return_if_fail (EV_IS_VIEW (view));
4565
4566         presentation = presentation != FALSE;
4567
4568         if (view->presentation == presentation)
4569                 return;
4570
4571         if (!presentation)
4572                 view->presentation_state = EV_PRESENTATION_NORMAL;
4573
4574         view->presentation = presentation;
4575         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4576
4577         if (presentation) {
4578                 view->sizing_mode_saved = view->sizing_mode;
4579                 view->scale_saved = view->scale;
4580                 ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
4581         } else {
4582                 ev_view_set_sizing_mode (view, view->sizing_mode_saved);
4583                 ev_view_set_zoom (view, view->scale_saved, FALSE);
4584         }
4585
4586         gtk_widget_queue_resize (GTK_WIDGET (view));
4587
4588         if (presentation)
4589                 ev_view_presentation_transition_start (view);
4590         else {
4591                 ev_view_presentation_transition_stop (view);
4592
4593                 if (view->animation) {
4594                         /* stop any running animation */
4595                         ev_view_transition_animation_cancel (view->animation, view);
4596                 }
4597         }
4598
4599         if (GTK_WIDGET_REALIZED (view)) {
4600                 if (view->presentation)
4601                         gdk_window_set_background (view->layout.bin_window,
4602                                                    &GTK_WIDGET (view)->style->black);
4603                 else
4604                         gdk_window_set_background (view->layout.bin_window,
4605                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
4606         }
4607
4608         g_object_notify (G_OBJECT (view), "presentation");
4609 }
4610
4611 gboolean
4612 ev_view_get_presentation (EvView *view)
4613 {
4614         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4615
4616         return view->presentation;
4617 }
4618
4619 static gboolean
4620 transition_next_page (EvView *view)
4621 {
4622         ev_view_next_page (view);
4623
4624         return FALSE;
4625 }
4626
4627 static void
4628 ev_view_presentation_transition_stop (EvView *view)
4629 {
4630         if (view->trans_timeout_id > 0)
4631                 g_source_remove (view->trans_timeout_id);
4632         view->trans_timeout_id = 0;
4633 }
4634
4635 static void
4636 ev_view_presentation_transition_start (EvView *view)
4637 {
4638         gdouble duration;
4639
4640         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
4641                 return;
4642
4643         ev_view_presentation_transition_stop (view);
4644
4645         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
4646                                                              view->current_page);
4647         if (duration > 0) {
4648                 view->trans_timeout_id =
4649                         g_timeout_add_seconds (duration,
4650                                                (GSourceFunc) transition_next_page,
4651                                                view);
4652         }
4653 }
4654
4655 void
4656 ev_view_set_sizing_mode (EvView       *view,
4657                          EvSizingMode  sizing_mode)
4658 {
4659         g_return_if_fail (EV_IS_VIEW (view));
4660
4661         if (view->sizing_mode == sizing_mode)
4662                 return;
4663
4664         view->sizing_mode = sizing_mode;
4665         gtk_widget_queue_resize (GTK_WIDGET (view));
4666
4667         g_object_notify (G_OBJECT (view), "sizing-mode");
4668 }
4669
4670 EvSizingMode
4671 ev_view_get_sizing_mode (EvView *view)
4672 {
4673         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
4674
4675         return view->sizing_mode;
4676 }
4677
4678 gboolean
4679 ev_view_can_zoom_in (EvView *view)
4680 {
4681         return view->scale * ZOOM_IN_FACTOR <= view->max_scale;
4682 }
4683
4684 gboolean
4685 ev_view_can_zoom_out (EvView *view)
4686 {
4687         return view->scale * ZOOM_OUT_FACTOR >= view->min_scale;
4688 }
4689
4690 void
4691 ev_view_zoom_in (EvView *view)
4692 {
4693         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
4694
4695         if (view->presentation)
4696                 return;
4697
4698         view->pending_scroll = SCROLL_TO_CENTER;
4699         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
4700 }
4701
4702 void
4703 ev_view_zoom_out (EvView *view)
4704 {
4705         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
4706
4707         if (view->presentation)
4708                 return;
4709
4710         view->pending_scroll = SCROLL_TO_CENTER;
4711         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
4712 }
4713
4714 void
4715 ev_view_rotate_right (EvView *view)
4716 {
4717         int rotation = view->rotation + 90;
4718
4719         if (rotation >= 360) {
4720                 rotation -= 360;
4721         }
4722
4723         ev_view_set_rotation (view, rotation);
4724 }
4725
4726 void
4727 ev_view_rotate_left (EvView *view)
4728 {
4729         int rotation = view->rotation - 90;
4730
4731         if (rotation < 0) {
4732                 rotation += 360;
4733         }
4734
4735         ev_view_set_rotation (view, rotation);
4736 }
4737
4738 void
4739 ev_view_set_rotation (EvView *view, int rotation)
4740 {
4741         view->rotation = rotation;
4742
4743         if (view->pixbuf_cache) {
4744                 ev_pixbuf_cache_clear (view->pixbuf_cache);
4745                 gtk_widget_queue_resize (GTK_WIDGET (view));
4746         }
4747
4748         if (rotation != 0)
4749                 clear_selection (view);
4750
4751         g_object_notify (G_OBJECT (view), "rotation");
4752 }
4753
4754 int
4755 ev_view_get_rotation (EvView *view)
4756 {
4757         return view->rotation;
4758 }
4759
4760 static double
4761 zoom_for_size_fit_width (int doc_width,
4762                          int doc_height,
4763                          int target_width,
4764                          int target_height,
4765                          int vsb_width)
4766 {
4767         double scale;
4768
4769         scale = (double)target_width / doc_width;
4770
4771         if (doc_height * scale > target_height)
4772                 scale = (double) (target_width - vsb_width) / doc_width;
4773
4774         return scale;
4775 }
4776
4777 static double
4778 zoom_for_size_fit_height (int doc_width,
4779                           int doc_height,
4780                           int target_width,
4781                           int target_height,
4782                           int vsb_height)
4783 {
4784         double scale;
4785
4786         scale = (double)target_height / doc_height;
4787
4788         if (doc_width * scale > target_width)
4789                 scale = (double) (target_height - vsb_height) / doc_height;
4790
4791         return scale;
4792 }
4793
4794 static double
4795 zoom_for_size_best_fit (int doc_width,
4796                         int doc_height,
4797                         int target_width,
4798                         int target_height,
4799                         int vsb_width,
4800                         int hsb_width)
4801 {
4802         double w_scale;
4803         double h_scale;
4804
4805         w_scale = (double)target_width / doc_width;
4806         h_scale = (double)target_height / doc_height;
4807
4808         if (doc_height * w_scale > target_height)
4809                 w_scale = (double) (target_width - vsb_width) / doc_width;
4810         if (doc_width * h_scale > target_width)
4811                 h_scale = (double) (target_height - hsb_width) / doc_height;
4812
4813         return MIN (w_scale, h_scale);
4814 }
4815
4816
4817 static void
4818 ev_view_zoom_for_size_presentation (EvView *view,
4819                                     int     width,
4820                                     int     height)
4821 {
4822         int doc_width, doc_height;
4823         gdouble scale;
4824
4825         ev_page_cache_get_size (view->page_cache,
4826                                 view->current_page,
4827                                 view->rotation,
4828                                 1.0,
4829                                 &doc_width,
4830                                 &doc_height);
4831         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
4832         ev_view_set_zoom (view, scale, FALSE);
4833 }
4834
4835 static void
4836 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
4837                            int     width,
4838                            int     height,
4839                            int     vsb_width,
4840                            int     hsb_height)
4841 {
4842         int doc_width, doc_height;
4843         GtkBorder border;
4844         gdouble scale;
4845
4846         ev_page_cache_get_max_width (view->page_cache,
4847                                      view->rotation,
4848                                      1.0,
4849                                      &doc_width);
4850         ev_page_cache_get_max_height (view->page_cache,
4851                                       view->rotation,
4852                                       1.0,
4853                                       &doc_height);
4854         compute_border (view, doc_width, doc_height, &border);
4855
4856         doc_width = doc_width * 2;
4857         width -= (2 * (border.left + border.right) + 3 * view->spacing);
4858         height -= (border.top + border.bottom + 2 * view->spacing - 1);
4859
4860         /* FIXME: We really need to calculate the overall height here, not the
4861          * page height.  We assume there's always a vertical scrollbar for
4862          * now.  We need to fix this. */
4863         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4864                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
4865         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4866                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
4867         else
4868                 g_assert_not_reached ();
4869
4870         ev_view_set_zoom (view, scale, FALSE);
4871 }
4872
4873 static void
4874 ev_view_zoom_for_size_continuous (EvView *view,
4875                                   int     width,
4876                                   int     height,
4877                                   int     vsb_width,
4878                                   int     hsb_height)
4879 {
4880         int doc_width, doc_height;
4881         GtkBorder border;
4882         gdouble scale;
4883
4884         ev_page_cache_get_max_width (view->page_cache,
4885                                      view->rotation,
4886                                      1.0,
4887                                      &doc_width);
4888         ev_page_cache_get_max_height (view->page_cache,
4889                                       view->rotation,
4890                                       1.0,
4891                                       &doc_height);
4892         compute_border (view, doc_width, doc_height, &border);
4893
4894         width -= (border.left + border.right + 2 * view->spacing);
4895         height -= (border.top + border.bottom + 2 * view->spacing - 1);
4896
4897         /* FIXME: We really need to calculate the overall height here, not the
4898          * page height.  We assume there's always a vertical scrollbar for
4899          * now.  We need to fix this. */
4900         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4901                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
4902         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4903                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
4904         else
4905                 g_assert_not_reached ();
4906
4907         ev_view_set_zoom (view, scale, FALSE);
4908 }
4909
4910 static void
4911 ev_view_zoom_for_size_dual_page (EvView *view,
4912                                  int     width,
4913                                  int     height,
4914                                  int     vsb_width,
4915                                  int     hsb_height)
4916 {
4917         GtkBorder border;
4918         gint doc_width, doc_height;
4919         gdouble scale;
4920         gint other_page;
4921
4922         other_page = view->current_page ^ 1;
4923
4924         /* Find the largest of the two. */
4925         ev_page_cache_get_size (view->page_cache,
4926                                 view->current_page,
4927                                 view->rotation,
4928                                 1.0,
4929                                 &doc_width, &doc_height);
4930
4931         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
4932                 gint width_2, height_2;
4933                 ev_page_cache_get_size (view->page_cache,
4934                                         other_page,
4935                                         view->rotation,
4936                                         1.0,
4937                                         &width_2, &height_2);
4938                 if (width_2 > doc_width)
4939                         doc_width = width_2;
4940                 if (height_2 > doc_height)
4941                         doc_height = height_2;
4942         }
4943         compute_border (view, doc_width, doc_height, &border);
4944
4945         doc_width = doc_width * 2;
4946         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
4947         height -= (border.top + border.bottom + 2 * view->spacing);
4948
4949         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4950                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
4951         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4952                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
4953         else
4954                 g_assert_not_reached ();
4955
4956         ev_view_set_zoom (view, scale, FALSE);
4957 }
4958
4959 static void
4960 ev_view_zoom_for_size_single_page (EvView *view,
4961                                    int     width,
4962                                    int     height,
4963                                    int     vsb_width,
4964                                    int     hsb_height)
4965 {
4966         int doc_width, doc_height;
4967         GtkBorder border;
4968         gdouble scale;
4969
4970         ev_page_cache_get_size (view->page_cache,
4971                                 view->current_page,
4972                                 view->rotation,
4973                                 1.0,
4974                                 &doc_width,
4975                                 &doc_height);
4976         /* Get an approximate border */
4977         compute_border (view, width, height, &border);
4978
4979         width -= (border.left + border.right + 2 * view->spacing);
4980         height -= (border.top + border.bottom + 2 * view->spacing);
4981
4982         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4983                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
4984         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4985                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
4986         else
4987                 g_assert_not_reached ();
4988
4989         ev_view_set_zoom (view, scale, FALSE);
4990 }
4991
4992 void
4993 ev_view_set_zoom_for_size (EvView *view,
4994                            int     width,
4995                            int     height,
4996                            int     vsb_width,
4997                            int     hsb_height)
4998 {
4999         g_return_if_fail (EV_IS_VIEW (view));
5000         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5001                           view->sizing_mode == EV_SIZING_BEST_FIT);
5002         g_return_if_fail (width >= 0);
5003         g_return_if_fail (height >= 0);
5004
5005         if (view->document == NULL)
5006                 return;
5007
5008         if (view->presentation)
5009                 ev_view_zoom_for_size_presentation (view, width, height);
5010         else if (view->continuous && view->dual_page)
5011                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
5012         else if (view->continuous)
5013                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
5014         else if (view->dual_page)
5015                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
5016         else
5017                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
5018 }
5019
5020 /*** Find ***/
5021 static gint
5022 ev_view_find_get_n_results (EvView *view, gint page)
5023 {
5024         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5025 }
5026
5027 static EvRectangle *
5028 ev_view_find_get_result (EvView *view, gint page, gint result)
5029 {
5030         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5031 }
5032
5033 static void
5034 jump_to_find_result (EvView *view)
5035 {
5036         gint n_results;
5037         gint page = view->current_page;
5038
5039         n_results = ev_view_find_get_n_results (view, page);
5040
5041         if (n_results > 0 && view->find_result < n_results) {
5042                 EvRectangle *rect;
5043                 GdkRectangle view_rect;
5044
5045                 rect = ev_view_find_get_result (view, page, view->find_result);
5046                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5047                 ensure_rectangle_is_visible (view, &view_rect);
5048                 view->jump_to_find_result = FALSE;
5049         }
5050 }
5051
5052 /**
5053  * jump_to_find_page
5054  * @view: #EvView instance
5055  * @direction: Direction to look
5056  * @shift: Shift from current page
5057  *
5058  * Jumps to the first page that has occurences of searched word.
5059  * Uses a direction where to look and a shift from current page.
5060  *
5061  */
5062 static void
5063 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5064 {
5065         int n_pages, i;
5066
5067         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5068
5069         for (i = 0; i < n_pages; i++) {
5070                 int page;
5071
5072                 if (direction == EV_VIEW_FIND_NEXT)
5073                         page = view->current_page + i;
5074                 else
5075                         page = view->current_page - i;
5076                 page += shift;
5077
5078                 if (page >= n_pages) {
5079                         page = page - n_pages;
5080                 } else if (page < 0)
5081                         page = page + n_pages;
5082
5083                 if (ev_view_find_get_n_results (view, page) > 0) {
5084                         ev_page_cache_set_current_page (view->page_cache, page);
5085                         break;
5086                 }
5087         }
5088 }
5089
5090 void
5091 ev_view_find_changed (EvView *view, GList **results, gint page)
5092 {
5093         view->find_pages = results;
5094
5095         if (view->jump_to_find_result == TRUE) {
5096                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5097                 jump_to_find_result (view);
5098         }
5099
5100         if (view->current_page == page)
5101                 gtk_widget_queue_draw (GTK_WIDGET (view));
5102 }
5103
5104 void
5105 ev_view_find_next (EvView *view)
5106 {
5107         gint n_results;
5108
5109         n_results = ev_view_find_get_n_results (view, view->current_page);
5110         view->find_result++;
5111
5112         if (view->find_result >= n_results) {
5113                 view->find_result = 0;
5114                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5115                 jump_to_find_result (view);
5116         } else {
5117                 jump_to_find_result (view);
5118                 gtk_widget_queue_draw (GTK_WIDGET (view));
5119         }
5120 }
5121
5122 void
5123 ev_view_find_previous (EvView *view)
5124 {
5125         view->find_result--;
5126
5127         if (view->find_result < 0) {
5128                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5129                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5130                 jump_to_find_result (view);
5131         } else {
5132                 jump_to_find_result (view);
5133                 gtk_widget_queue_draw (GTK_WIDGET (view));
5134         }
5135 }
5136
5137 void
5138 ev_view_find_search_changed (EvView *view)
5139 {
5140         /* search string has changed, focus on new search result */
5141         view->jump_to_find_result = TRUE;
5142         view->find_pages = NULL;
5143 }
5144
5145 void
5146 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5147 {
5148         view->highlight_find_results = value;
5149         gtk_widget_queue_draw (GTK_WIDGET (view));
5150 }
5151
5152 void
5153 ev_view_find_cancel (EvView *view)
5154 {
5155         view->find_pages = NULL;
5156 }
5157
5158 /*** Selections ***/
5159
5160 /* compute_new_selection_rect/text calculates the area currently selected by
5161  * view_rect.  each handles a different mode;
5162  */
5163 static GList *
5164 compute_new_selection_rect (EvView       *view,
5165                             GdkPoint     *start,
5166                             GdkPoint     *stop)
5167 {
5168         GdkRectangle view_rect;
5169         int n_pages, i;
5170         GList *list = NULL;
5171
5172         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5173
5174         view_rect.x = MIN (start->x, stop->x);
5175         view_rect.y = MIN (start->y, stop->y);
5176         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5177         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5178
5179         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5180
5181         for (i = 0; i < n_pages; i++) {
5182                 GdkRectangle page_area;
5183                 GtkBorder border;
5184
5185                 if (get_page_extents (view, i, &page_area, &border)) {
5186                         GdkRectangle overlap;
5187
5188                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5189                                 EvViewSelection *selection;
5190
5191                                 selection = g_new0 (EvViewSelection, 1);
5192                                 selection->page = i;
5193                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5194                                                        &(selection->rect));
5195
5196                                 list = g_list_append (list, selection);
5197                         }
5198                 }
5199         }
5200
5201         return list;
5202 }
5203
5204 static gboolean
5205 gdk_rectangle_point_in (GdkRectangle *rectangle,
5206                         GdkPoint     *point)
5207 {
5208         return rectangle->x <= point->x &&
5209                 rectangle->y <= point->y &&
5210                 point->x < rectangle->x + rectangle->width &&
5211                 point->y < rectangle->y + rectangle->height;
5212 }
5213
5214 static GList *
5215 compute_new_selection_text (EvView          *view,
5216                             EvSelectionStyle style,
5217                             GdkPoint        *start,
5218                             GdkPoint        *stop)
5219 {
5220         int n_pages, i, first, last;
5221         GList *list = NULL;
5222         EvViewSelection *selection;
5223         gint width, height;
5224         int start_page, end_page;
5225
5226         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5227
5228         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5229
5230         /* First figure out the range of pages the selection
5231          * affects. */
5232         first = n_pages;
5233         last = 0;
5234         if (view->continuous) {
5235                 start_page = 0;
5236                 end_page = n_pages;
5237         } else if (view->dual_page) {
5238                 start_page = view->start_page;
5239                 end_page = view->end_page + 1;
5240         } else {
5241                 start_page = view->current_page;
5242                 end_page = view->current_page + 1;
5243         }
5244
5245         for (i = start_page; i < end_page; i++) {
5246                 GdkRectangle page_area;
5247                 GtkBorder border;
5248
5249                 get_page_extents (view, i, &page_area, &border);
5250                 if (gdk_rectangle_point_in (&page_area, start) ||
5251                     gdk_rectangle_point_in (&page_area, stop)) {
5252                         if (first == n_pages)
5253                                 first = i;
5254                         last = i;
5255                 }
5256
5257         }
5258
5259         /* Now create a list of EvViewSelection's for the affected
5260          * pages.  This could be an empty list, a list of just one
5261          * page or a number of pages.*/
5262         for (i = first; i < last + 1; i++) {
5263                 GdkRectangle page_area;
5264                 GtkBorder border;
5265                 GdkPoint *point;
5266
5267                 ev_page_cache_get_size (view->page_cache, i,
5268                                         view->rotation,
5269                                         1.0, &width, &height);
5270
5271                 selection = g_new0 (EvViewSelection, 1);
5272                 selection->page = i;
5273                 selection->style = style;
5274                 selection->rect.x1 = selection->rect.y1 = 0;
5275                 selection->rect.x2 = width;
5276                 selection->rect.y2 = height;
5277
5278                 get_page_extents (view, i, &page_area, &border);
5279
5280                 if (gdk_rectangle_point_in (&page_area, start))
5281                         point = start;
5282                 else
5283                         point = stop;
5284
5285                 if (i == first)
5286                         view_point_to_doc_point (view, point, &page_area,
5287                                                  &selection->rect.x1,
5288                                                  &selection->rect.y1);
5289
5290                 /* If the selection is contained within just one page,
5291                  * make sure we don't write 'start' into both points
5292                  * in selection->rect. */
5293                 if (first == last)
5294                         point = stop;
5295
5296                 if (i == last)
5297                         view_point_to_doc_point (view, point, &page_area,
5298                                                  &selection->rect.x2,
5299                                                  &selection->rect.y2);
5300
5301                 list = g_list_append (list, selection);
5302         }
5303
5304         return list;
5305 }
5306
5307 /* This function takes the newly calculated list, and figures out which regions
5308  * have changed.  It then queues a redraw approporiately.
5309  */
5310 static void
5311 merge_selection_region (EvView *view,
5312                         GList  *new_list)
5313 {
5314         GList *old_list;
5315         GList *new_list_ptr, *old_list_ptr;
5316
5317         /* Update the selection */
5318         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5319         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5320         g_list_free (view->selection_info.selections);
5321         view->selection_info.selections = new_list;
5322         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5323         g_object_notify (G_OBJECT (view), "has-selection");
5324
5325         new_list_ptr = new_list;
5326         old_list_ptr = old_list;
5327
5328         while (new_list_ptr || old_list_ptr) {
5329                 EvViewSelection *old_sel, *new_sel;
5330                 int cur_page;
5331                 GdkRegion *region = NULL;
5332
5333                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5334                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5335
5336                 /* Assume that the lists are in order, and we run through them
5337                  * comparing them, one page at a time.  We come out with the
5338                  * first page we see. */
5339                 if (new_sel && old_sel) {
5340                         if (new_sel->page < old_sel->page) {
5341                                 new_list_ptr = new_list_ptr->next;
5342                                 old_sel = NULL;
5343                         } else if (new_sel->page > old_sel->page) {
5344                                 old_list_ptr = old_list_ptr->next;
5345                                 new_sel = NULL;
5346                         } else {
5347                                 new_list_ptr = new_list_ptr->next;
5348                                 old_list_ptr = old_list_ptr->next;
5349                         }
5350                 } else if (new_sel) {
5351                         new_list_ptr = new_list_ptr->next;
5352                 } else if (old_sel) {
5353                         old_list_ptr = old_list_ptr->next;
5354                 }
5355
5356                 g_assert (new_sel || old_sel);
5357
5358                 /* is the page we're looking at on the screen?*/
5359                 cur_page = new_sel ? new_sel->page : old_sel->page;
5360                 if (cur_page < view->start_page || cur_page > view->end_page)
5361                         continue;
5362
5363                 /* seed the cache with a new page.  We are going to need the new
5364                  * region too. */
5365                 if (new_sel) {
5366                         GdkRegion *tmp_region = NULL;
5367
5368                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5369                                                                cur_page,
5370                                                                view->scale,
5371                                                                &tmp_region);
5372
5373                         if (tmp_region) {
5374                                 new_sel->covered_region = gdk_region_copy (tmp_region);
5375                         }
5376                 }
5377
5378                 /* Now we figure out what needs redrawing */
5379                 if (old_sel && new_sel) {
5380                         if (old_sel->covered_region && new_sel->covered_region) {
5381                                 /* We only want to redraw the areas that have
5382                                  * changed, so we xor the old and new regions
5383                                  * and redraw if it's different */
5384                                 region = gdk_region_copy (old_sel->covered_region);
5385                                 gdk_region_xor (region, new_sel->covered_region);
5386                                 if (gdk_region_empty (region)) {
5387                                         gdk_region_destroy (region);
5388                                         region = NULL;
5389                                 }
5390                         } else if (old_sel->covered_region) {
5391                                 region = gdk_region_copy (old_sel->covered_region);
5392                         } else if (new_sel->covered_region) {
5393                                 region = gdk_region_copy (new_sel->covered_region);
5394                         }
5395                 } else if (old_sel && !new_sel) {
5396                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
5397                                 region = gdk_region_copy (old_sel->covered_region);
5398                         }
5399                 } else if (!old_sel && new_sel) {
5400                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
5401                                 region = gdk_region_copy (new_sel->covered_region);
5402                         }
5403                 } else {
5404                         g_assert_not_reached ();
5405                 }
5406
5407                 /* Redraw the damaged region! */
5408                 if (region) {
5409                         GdkRectangle page_area;
5410                         GtkBorder border;
5411
5412                         /* I don't know why but the region is smaller
5413                          * than expected. This hack fixes it, I guess
5414                          * 10 pixels more won't hurt
5415                          */
5416                         gdk_region_shrink (region, -5, -5);
5417
5418                         get_page_extents (view, cur_page, &page_area, &border);
5419                         gdk_region_offset (region,
5420                                            page_area.x + border.left - view->scroll_x,
5421                                            page_area.y + border.top - view->scroll_y);
5422                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
5423                         gdk_region_destroy (region);
5424                 }
5425         }
5426
5427         /* Free the old list, now that we're done with it. */
5428         g_list_foreach (old_list, (GFunc) selection_free, NULL);
5429         g_list_free (old_list);
5430 }
5431
5432 static void
5433 compute_selections (EvView          *view,
5434                     EvSelectionStyle style,
5435                     GdkPoint        *start,
5436                     GdkPoint        *stop)
5437 {
5438         GList *list;
5439
5440         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
5441                 list = compute_new_selection_rect (view, start, stop);
5442         else
5443                 list = compute_new_selection_text (view, style, start, stop);
5444         merge_selection_region (view, list);
5445 }
5446
5447 /* Free's the selection.  It's up to the caller to queue redraws if needed.
5448  */
5449 static void
5450 selection_free (EvViewSelection *selection)
5451 {
5452         if (selection->covered_region)
5453                 gdk_region_destroy (selection->covered_region);
5454         g_free (selection);
5455 }
5456
5457 static void
5458 clear_selection (EvView *view)
5459 {
5460         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5461         g_list_free (view->selection_info.selections);
5462         view->selection_info.selections = NULL;
5463         view->selection_info.in_selection = FALSE;
5464         if (view->pixbuf_cache)
5465                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
5466         g_object_notify (G_OBJECT (view), "has-selection");
5467 }
5468
5469 void
5470 ev_view_select_all (EvView *view)
5471 {
5472         GList *selections = NULL;
5473         int n_pages, i;
5474
5475         /* Disable selection on rotated pages for the 0.4.0 series */
5476         if (view->rotation != 0)
5477                 return;
5478
5479         clear_selection (view);
5480
5481         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5482         for (i = 0; i < n_pages; i++) {
5483                 int width, height;
5484                 EvViewSelection *selection;
5485
5486                 ev_page_cache_get_size (view->page_cache,
5487                                         i,
5488                                         view->rotation,
5489                                         1.0, &width, &height);
5490
5491                 selection = g_new0 (EvViewSelection, 1);
5492                 selection->page = i;
5493                 selection->style = EV_SELECTION_STYLE_GLYPH;
5494                 selection->rect.x1 = selection->rect.y1 = 0;
5495                 selection->rect.x2 = width;
5496                 selection->rect.y2 = height;
5497
5498                 selections = g_list_append (selections, selection);
5499         }
5500
5501         merge_selection_region (view, selections);
5502         gtk_widget_queue_draw (GTK_WIDGET (view));
5503 }
5504
5505 gboolean
5506 ev_view_get_has_selection (EvView *view)
5507 {
5508         return view->selection_info.selections != NULL;
5509 }
5510
5511 static char *
5512 get_selected_text (EvView *view)
5513 {
5514         GString *text;
5515         GList *l;
5516         gchar *normalized_text;
5517         EvRenderContext *rc;
5518
5519         text = g_string_new (NULL);
5520         rc = ev_render_context_new (NULL, view->rotation, view->scale);
5521
5522         ev_document_doc_mutex_lock ();
5523
5524         for (l = view->selection_info.selections; l != NULL; l = l->next) {
5525                 EvViewSelection *selection = (EvViewSelection *)l->data;
5526                 EvPage *page;
5527                 gchar *tmp;
5528
5529                 page = ev_document_get_page (view->document, selection->page);
5530                 ev_render_context_set_page (rc, page);
5531                 g_object_unref (page);
5532
5533                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
5534                                                       rc, selection->style,
5535                                                       &(selection->rect));
5536
5537                 g_string_append (text, tmp);
5538                 g_free (tmp);
5539         }
5540
5541         g_object_unref (rc);
5542
5543         ev_document_doc_mutex_unlock ();
5544
5545         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
5546         g_string_free (text, TRUE);
5547         return normalized_text;
5548 }
5549
5550 static void
5551 ev_view_clipboard_copy (EvView      *view,
5552                         const gchar *text)
5553 {
5554         GtkClipboard *clipboard;
5555
5556         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
5557                                               GDK_SELECTION_CLIPBOARD);
5558         gtk_clipboard_set_text (clipboard, text, -1);
5559 }
5560
5561 void
5562 ev_view_copy (EvView *ev_view)
5563 {
5564         char *text;
5565
5566         if (!EV_IS_SELECTION (ev_view->document))
5567                 return;
5568
5569         text = get_selected_text (ev_view);
5570         ev_view_clipboard_copy (ev_view, text);
5571         g_free (text);
5572 }
5573
5574 static void
5575 ev_view_primary_get_cb (GtkClipboard     *clipboard,
5576                         GtkSelectionData *selection_data,
5577                         guint             info,
5578                         gpointer          data)
5579 {
5580         EvView *ev_view = EV_VIEW (data);
5581
5582         if (ev_view->link_selected) {
5583                 gtk_selection_data_set_text (selection_data,
5584                                              ev_link_action_get_uri (ev_view->link_selected),
5585                                              -1);
5586         } else if (EV_IS_SELECTION (ev_view->document) &&
5587                    ev_view->selection_info.selections) {
5588                 gchar *text;
5589
5590                 text = get_selected_text (ev_view);
5591                 if (text) {
5592                         gtk_selection_data_set_text (selection_data, text, -1);
5593                         g_free (text);
5594                 }
5595         }
5596 }
5597
5598 static void
5599 ev_view_primary_clear_cb (GtkClipboard *clipboard,
5600                           gpointer      data)
5601 {
5602         EvView *view = EV_VIEW (data);
5603
5604         clear_selection (view);
5605         clear_link_selected (view);
5606 }
5607
5608 static void
5609 ev_view_update_primary_selection (EvView *ev_view)
5610 {
5611         GtkClipboard *clipboard;
5612
5613         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
5614                                               GDK_SELECTION_PRIMARY);
5615
5616         if (ev_view->selection_info.selections || ev_view->link_selected) {
5617                 GtkTargetList *target_list;
5618                 GtkTargetEntry *targets;
5619                 int n_targets;
5620
5621                 target_list = gtk_target_list_new (NULL, 0);
5622                 gtk_target_list_add_text_targets (target_list, 0);
5623                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
5624                 gtk_target_list_unref (target_list);
5625
5626                 if (!gtk_clipboard_set_with_owner (clipboard,
5627                                                    targets, n_targets,
5628                                                    ev_view_primary_get_cb,
5629                                                    ev_view_primary_clear_cb,
5630                                                    G_OBJECT (ev_view)))
5631                         ev_view_primary_clear_cb (clipboard, ev_view);
5632
5633                 gtk_target_table_free (targets, n_targets);
5634         } else {
5635                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
5636                         gtk_clipboard_clear (clipboard);
5637         }
5638 }
5639
5640 static void
5641 clear_link_selected (EvView *view)
5642 {
5643         if (view->link_selected) {
5644                 g_object_unref (view->link_selected);
5645                 view->link_selected = NULL;
5646         }
5647 }
5648
5649 void
5650 ev_view_copy_link_address (EvView       *view,
5651                            EvLinkAction *action)
5652 {
5653         clear_link_selected (view);
5654
5655         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
5656
5657         view->link_selected = g_object_ref (action);
5658         ev_view_update_primary_selection (view);
5659 }
5660
5661 /*** Cursor operations ***/
5662
5663 static GdkCursor *
5664 ev_view_create_invisible_cursor(void)
5665 {
5666        GdkBitmap *empty;
5667        GdkColor black = { 0, 0, 0, 0 };
5668        static char bits[] = { 0x00 };
5669
5670        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
5671
5672        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
5673 }
5674
5675 static void
5676 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
5677 {
5678         GdkCursor *cursor = NULL;
5679         GdkDisplay *display;
5680         GtkWidget *widget;
5681
5682         if (view->cursor == new_cursor) {
5683                 return;
5684         }
5685
5686         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
5687         display = gtk_widget_get_display (widget);
5688         view->cursor = new_cursor;
5689
5690         switch (new_cursor) {
5691                 case EV_VIEW_CURSOR_NORMAL:
5692                         gdk_window_set_cursor (view->layout.bin_window, NULL);
5693                         break;
5694                 case EV_VIEW_CURSOR_IBEAM:
5695                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
5696                         break;
5697                 case EV_VIEW_CURSOR_LINK:
5698                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
5699                         break;
5700                 case EV_VIEW_CURSOR_WAIT:
5701                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
5702                         break;
5703                 case EV_VIEW_CURSOR_HIDDEN:
5704                         cursor = ev_view_create_invisible_cursor ();
5705                         break;
5706                 case EV_VIEW_CURSOR_DRAG:
5707                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
5708                         break;
5709                 case EV_VIEW_CURSOR_AUTOSCROLL:
5710                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
5711                         break;
5712         }
5713
5714         if (cursor) {
5715                 gdk_window_set_cursor (view->layout.bin_window, cursor);
5716                 gdk_cursor_unref (cursor);
5717                 gdk_flush();
5718         }
5719 }
5720
5721 void
5722 ev_view_hide_cursor (EvView *view)
5723 {
5724        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
5725 }
5726
5727 void
5728 ev_view_show_cursor (EvView *view)
5729 {
5730        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
5731 }
5732
5733 static void
5734 ev_view_reset_presentation_state (EvView *view)
5735 {
5736         if (!view->presentation ||
5737             view->presentation_state == EV_PRESENTATION_NORMAL)
5738                 return;
5739
5740         view->presentation_state = EV_PRESENTATION_NORMAL;
5741         gdk_window_set_background (view->layout.bin_window,
5742                                    &GTK_WIDGET (view)->style->black);
5743         gtk_widget_queue_draw (GTK_WIDGET (view));
5744 }
5745
5746 gboolean
5747 ev_view_next_page (EvView *view)
5748 {
5749         int page, n_pages;
5750
5751         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5752
5753         if (!view->page_cache)
5754                 return FALSE;
5755
5756         if (view->presentation &&
5757             (view->presentation_state == EV_PRESENTATION_BLACK ||
5758              view->presentation_state == EV_PRESENTATION_WHITE)) {
5759                 ev_view_reset_presentation_state (view);
5760                 return FALSE;
5761         }
5762
5763         if (view->animation) {
5764                 ev_view_transition_animation_cancel (view->animation, view);
5765         }
5766
5767         ev_view_presentation_transition_stop (view);
5768         ev_view_reset_presentation_state (view);
5769
5770         page = ev_page_cache_get_current_page (view->page_cache);
5771         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5772
5773         if (view->dual_page && !view->presentation)
5774                 page = page + 2;
5775         else
5776                 page = page + 1;
5777
5778         if (page < n_pages) {
5779                 ev_page_cache_set_current_page (view->page_cache, page);
5780                 return TRUE;
5781         } else if (view->presentation && page == n_pages) {
5782                 view->presentation_state = EV_PRESENTATION_END;
5783                 gtk_widget_queue_draw (GTK_WIDGET (view));
5784                 return TRUE;
5785         } else if (view->dual_page && page == n_pages) {
5786                 ev_page_cache_set_current_page (view->page_cache, page - 1);
5787                 return TRUE;
5788         } else {
5789                 return FALSE;
5790         }
5791 }
5792
5793 gboolean
5794 ev_view_previous_page (EvView *view)
5795 {
5796         int page;
5797
5798         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5799
5800         if (!view->page_cache)
5801                 return FALSE;
5802
5803         if (view->presentation &&
5804             view->presentation_state == EV_PRESENTATION_END) {
5805                 ev_view_reset_presentation_state (view);
5806                 return TRUE;
5807         }
5808
5809         if (view->presentation &&
5810             (view->presentation_state == EV_PRESENTATION_BLACK ||
5811              view->presentation_state == EV_PRESENTATION_WHITE)) {
5812                 ev_view_reset_presentation_state (view);
5813                 return FALSE;
5814         }
5815
5816         if (view->animation) {
5817                 ev_view_transition_animation_cancel (view->animation, view);
5818         }
5819
5820         ev_view_reset_presentation_state (view);
5821
5822         page = ev_page_cache_get_current_page (view->page_cache);
5823
5824         if (view->dual_page && !view->presentation)
5825                 page = page - 2;
5826         else
5827                 page = page - 1;
5828
5829         if (page >= 0) {
5830                 ev_page_cache_set_current_page (view->page_cache, page);
5831                 return TRUE;
5832         } else if (ev_view_get_dual_page (view) && page == -1) {
5833                 ev_page_cache_set_current_page (view->page_cache, 0);
5834                 return TRUE;
5835         } else {
5836                 return FALSE;
5837         }
5838 }
5839