shell/ev-view.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *  Copyright (C) 2004 Red Hat, Inc
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include <math.h>
  22 #include <string.h>
  23 #include <gtk/gtkalignment.h>
  24 #include <glib/gi18n.h>
  25 #include <gtk/gtkbindings.h>
  26 #include <gtk/gtkselection.h>
  27 #include <gtk/gtkclipboard.h>
  28 #include <gdk/gdkkeysyms.h>
  29 #include <libgnomevfs/gnome-vfs-utils.h>
  30
  31 #include "ev-marshal.h"
  32 #include "ev-view.h"
  33 #include "ev-view-private.h"
  34 #include "ev-utils.h"
  35 #include "ev-selection.h"
  36 #include "ev-document-links.h"
  37 #include "ev-document-find.h"
  38 #include "ev-document-misc.h"
  39 #include "ev-debug.h"
  40 #include "ev-job-queue.h"
  41 #include "ev-page-cache.h"
  42 #include "ev-pixbuf-cache.h"
  43 #include "ev-tooltip.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
  50 enum {
  51         PROP_0,
  52         PROP_STATUS,
  53         PROP_FIND_STATUS,
  54         PROP_CONTINUOUS,
  55         PROP_DUAL_PAGE,
  56         PROP_FULLSCREEN,
  57         PROP_PRESENTATION,
  58         PROP_SIZING_MODE,
  59         PROP_ZOOM,
  60         PROP_ROTATION,
  61         PROP_HAS_SELECTION,
  62 };
  63
  64 enum {
  65         SIGNAL_BINDING_ACTIVATED,
  66         SIGNAL_ZOOM_INVALID,
  67         SIGNAL_EXTERNAL_LINK,
  68         SIGNAL_POPUP_MENU,
  69         N_SIGNALS,
  70 };
  71
  72 enum {
  73         TARGET_STRING,
  74         TARGET_TEXT,
  75         TARGET_COMPOUND_TEXT,
  76         TARGET_UTF8_STRING,
  77         TARGET_TEXT_BUFFER_CONTENTS
  78 };
  79
  80 static const GtkTargetEntry targets[] = {
  81         { "STRING", 0, TARGET_STRING },
  82         { "TEXT",   0, TARGET_TEXT },
  83         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  84         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  85 };
  86
  87 static guint signals[N_SIGNALS];
  88
  89 typedef enum {
  90         EV_VIEW_FIND_NEXT,
  91         EV_VIEW_FIND_PREV
  92 } EvViewFindDirection;
  93
  94 #define ZOOM_IN_FACTOR  1.2
  95 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  96
  97 #define MIN_SCALE 0.05409
  98 #define MAX_SCALE 4.0
  99
 100 #define SCROLL_TIME 150
 101
 102 /*** Scrolling ***/
 103 static void       scroll_to_current_page                     (EvView *view,
 104                                                               GtkOrientation orientation);
 105 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 106                                                               GtkAdjustment      *hadjustment,
 107                                                               GtkAdjustment      *vadjustment);
 108 static void       view_update_range_and_current_page         (EvView             *view);
 109 static void       set_scroll_adjustment                      (EvView             *view,
 110                                                               GtkOrientation      orientation,
 111                                                               GtkAdjustment      *adjustment);
 112 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 113                                                               GtkAdjustment      *hadjustment,
 114                                                               GtkAdjustment      *vadjustment);
 115 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 116                                                               guint               keyval,
 117                                                               GdkModifierType modifiers,
 118                                                               EvScrollType       scroll,
 119                                                               gboolean            horizontal);
 120 static void       ensure_rectangle_is_visible                (EvView             *view,
 121                                                               GdkRectangle       *rect);
 122
 123 /*** Geometry computations ***/
 124 static void       compute_border                             (EvView             *view,
 125                                                               int                 width,
 126                                                               int                 height,
 127                                                               GtkBorder          *border);
 128 static void       get_page_y_offset                          (EvView *view,
 129                                                               int page,
 130                                                               double zoom,
 131                                                               int *y_offset);
 132 static gboolean   get_page_extents                           (EvView             *view,
 133                                                               gint                page,
 134                                                               GdkRectangle       *page_area,
 135                                                               GtkBorder          *border);
 136 static void       view_rect_to_doc_rect                      (EvView             *view,
 137                                                               GdkRectangle       *view_rect,
 138                                                               GdkRectangle       *page_area,
 139                                                               EvRectangle        *doc_rect);
 140 static void       doc_rect_to_view_rect                      (EvView             *view,
 141                                                               int                 page,
 142                                                               EvRectangle        *doc_rect,
 143                                                               GdkRectangle       *view_rect);
 144 static void       find_page_at_location                      (EvView             *view,
 145                                                               gdouble             x,
 146                                                               gdouble             y,
 147                                                               gint               *page,
 148                                                               gint               *x_offset,
 149                                                               gint               *y_offset);
 150 static gboolean  doc_point_to_view_point                     (EvView       *view,
 151                                                               int           page,
 152                                                               EvPoint      *doc_point,
 153                                                               GdkPoint     *view_point);
 154 /*** Hyperrefs ***/
 155 static EvLink *   ev_view_get_link_at_location               (EvView  *view,
 156                                                               gdouble  x,
 157                                                               gdouble  y);
 158 static char*      tip_from_link                              (EvView             *view,
 159                                                               EvLink             *link);
 160 static void       handle_link_over_xy                        (EvView *view,
 161                                                               gint x,
 162                                                               gint y);
 163 /*** GtkWidget implementation ***/
 164 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 165                                                               GtkRequisition     *requisition);
 166 static void       ev_view_size_request_continuous            (EvView             *view,
 167                                                               GtkRequisition     *requisition);
 168 static void       ev_view_size_request_dual_page             (EvView             *view,
 169                                                               GtkRequisition     *requisition);
 170 static void       ev_view_size_request_single_page           (EvView             *view,
 171                                                               GtkRequisition     *requisition);
 172 static void       ev_view_size_request                       (GtkWidget          *widget,
 173                                                               GtkRequisition     *requisition);
 174 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 175                                                               GtkAllocation      *allocation);
 176 static void       ev_view_realize                            (GtkWidget          *widget);
 177 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 178                                                               GdkEventScroll     *event);
 179 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 180                                                               GdkEventExpose     *event);
 181 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 182 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 183                                                               GdkEventButton     *event);
 184 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 185                                                               GdkEventMotion     *event);
 186 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 187                                                               GdkEventButton     *event);
 188 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 189                                                               GdkEventCrossing   *event);
 190 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 191                                                               GdkEventCrossing   *event);
 192 static void       ev_view_style_set                          (GtkWidget          *widget,
 193                                                               GtkStyle           *old_style);
 194
 195 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 196
 197 /*** Drawing ***/
 198 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 199 static void       draw_rubberband                            (GtkWidget          *widget,
 200                                                               GdkWindow          *window,
 201                                                               const GdkRectangle *rect,
 202                                                               guchar              alpha);
 203 static void       highlight_find_results                     (EvView             *view,
 204                                                               int                 page);
 205 static void       draw_one_page                              (EvView             *view,
 206                                                               gint                page,
 207                                                               GdkRectangle       *page_area,
 208                                                               GtkBorder          *border,
 209                                                               GdkRectangle       *expose_area,
 210                                                               gboolean           *page_ready);
 211 static void       draw_loading_text                          (EvView             *view,
 212                                                               GdkRectangle       *page_area,
 213                                                               GdkRectangle       *expose_area);
 214
 215 /*** Callbacks ***/
 216 static void       find_changed_cb                            (EvDocument         *document,
 217                                                               int                 page,
 218                                                               EvView             *view);
 219 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 220                                                               EvView             *view);
 221 static void       page_changed_cb                            (EvPageCache        *page_cache,
 222                                                               int                 new_page,
 223                                                               EvView             *view);
 224 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 225                                                               EvView             *view);
 226
 227 /*** GObject ***/
 228 static void       ev_view_finalize                           (GObject            *object);
 229 static void       ev_view_destroy                            (GtkObject          *object);
 230 static void       ev_view_set_property                       (GObject            *object,
 231                                                               guint               prop_id,
 232                                                               const GValue       *value,
 233                                                               GParamSpec         *pspec);
 234 static void       ev_view_get_property                       (GObject            *object,
 235                                                               guint               prop_id,
 236                                                               GValue             *value,
 237                                                               GParamSpec         *pspec);
 238 static void       ev_view_class_init                         (EvViewClass        *class);
 239 static void       ev_view_init                               (EvView             *view);
 240
 241 /*** Zoom and sizing ***/
 242 static double   zoom_for_size_fit_width                      (int doc_width,
 243                                                               int doc_height,
 244                                                               int target_width,
 245                                                               int target_height,
 246                                                               int vsb_width);
 247 static double   zoom_for_size_fit_height                     (int doc_width,
 248                                                               int doc_height,
 249                                                               int target_width,
 250                                                               int target_height,
 251                                                               int vsb_height);
 252 static double   zoom_for_size_best_fit                       (int doc_width,
 253                                                               int doc_height,
 254                                                               int target_width,
 255                                                               int target_height,
 256                                                               int vsb_width,
 257                                                               int hsb_width);
 258 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 259                                                               int     width,
 260                                                               int     height);
 261 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 262                                                                 int     width,
 263                                                                 int     height,
 264                                                                 int     vsb_width,
 265                                                                 int     hsb_height);
 266 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 267                                                                 int     width,
 268                                                                 int     height,
 269                                                                 int     vsb_width,
 270                                                                 int     hsb_height);
 271 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 272                                                                 int     width,
 273                                                                 int     height,
 274                                                                 int     vsb_width,
 275                                                                 int     hsb_height);
 276 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 277                                                                 int     width,
 278                                                                 int     height,
 279                                                                 int     vsb_width,
 280                                                                 int     hsb_height);
 281 /*** Cursors ***/
 282 static GdkCursor* ev_view_create_invisible_cursor            (void);
 283 static void       ev_view_set_cursor                         (EvView             *view,
 284                                                               EvViewCursor        new_cursor);
 285
 286 /*** Status messages ***/
 287 static void       ev_view_set_status                         (EvView             *view,
 288                                                               const char         *message);
 289 static void       update_find_status_message                 (EvView             *view,
 290                                                               gboolean            this_page);
 291 static void       ev_view_set_find_status                    (EvView             *view,
 292                                                               const char         *message);
 293 /*** Find ***/
 294 static void       jump_to_find_result                        (EvView             *view);
 295 static void       jump_to_find_page                          (EvView             *view,
 296                                                               EvViewFindDirection direction,
 297                                                               gint                shift);
 298
 299 /*** Selection ***/
 300 static void       compute_selections                         (EvView             *view,
 301                                                               GdkPoint           *start,
 302                                                               GdkPoint           *stop);
 303 static void       clear_selection                            (EvView             *view);
 304 static void       selection_free                             (EvViewSelection    *selection);
 305 static char*      get_selected_text                          (EvView             *ev_view);
 306 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 307                                                               GtkSelectionData   *selection_data,
 308                                                               guint               info,
 309                                                               gpointer            data);
 310 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 311                                                               gpointer            data);
 312 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 313
 314
 315 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 316
 317 static void
 318 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 319 {
 320         GdkPoint view_point;
 321
 322         if (view->document == NULL) {
 323                 return;
 324         }
 325
 326         doc_point_to_view_point (view, view->current_page, &view->pending_point, &view_point);
 327
 328         if (orientation == GTK_ORIENTATION_VERTICAL) {
 329                 view->pending_point.y = 0;
 330         } else {
 331                 view->pending_point.x = 0;
 332         }
 333
 334         if (orientation == GTK_ORIENTATION_VERTICAL) {
 335                 if (view->continuous) {
 336                         gtk_adjustment_clamp_page (view->vadjustment,
 337                                                    view_point.y - view->spacing / 2,
 338                                                    view_point.y + view->vadjustment->page_size);
 339                 } else {
 340                         gtk_adjustment_set_value (view->vadjustment,
 341                                                   CLAMP (view_point.y,
 342                                                   view->vadjustment->lower,
 343                                                   view->vadjustment->upper -
 344                                                   view->vadjustment->page_size));
 345                 }
 346         } else {
 347                 if (view->dual_page) {
 348                         gtk_adjustment_clamp_page (view->hadjustment,
 349                                                    view_point.x,
 350                                                    view_point.x + view->hadjustment->page_size);
 351                 } else {
 352                         gtk_adjustment_set_value (view->hadjustment,
 353                                                   CLAMP (view_point.x,
 354                                                   view->hadjustment->lower,
 355                                                   view->hadjustment->upper -
 356                                                   view->hadjustment->page_size));
 357                 }
 358         }
 359 }
 360
 361 static void
 362 view_set_adjustment_values (EvView         *view,
 363                             GtkOrientation  orientation)
 364 {
 365         GtkWidget *widget = GTK_WIDGET (view);
 366         GtkAdjustment *adjustment;
 367         int requisition;
 368         int allocation;
 369
 370         double factor;
 371         gint new_value;
 372
 373         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 374                 requisition = widget->requisition.width;
 375                 allocation = widget->allocation.width;
 376                 adjustment = view->hadjustment;
 377         } else {
 378                 requisition = widget->requisition.height;
 379                 allocation = widget->allocation.height;
 380                 adjustment = view->vadjustment;
 381         }
 382
 383         if (!adjustment)
 384                 return;
 385
 386         factor = 1.0;
 387         switch (view->pending_scroll) {
 388                 case SCROLL_TO_KEEP_POSITION:
 389                         factor = (adjustment->value) / adjustment->upper;
 390                         break;
 391                 case SCROLL_TO_PAGE_POSITION:
 392                         break;
 393                 case SCROLL_TO_CENTER:
 394                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 395                         break;
 396         }
 397
 398         adjustment->page_size = allocation;
 399         adjustment->step_increment = allocation * 0.1;
 400         adjustment->page_increment = allocation * 0.9;
 401         adjustment->lower = 0;
 402         adjustment->upper = MAX (allocation, requisition);
 403
 404         /*
 405          * We add 0.5 to the values before to average out our rounding errors.
 406          */
 407         switch (view->pending_scroll) {
 408                 case SCROLL_TO_KEEP_POSITION:
 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         if (view->pending_scroll != SCROLL_TO_KEEP_POSITION)
 432                 return;
 433
 434         /* Presentation trumps all other modes */
 435         if (view->presentation) {
 436                 view->start_page = view->current_page;
 437                 view->end_page = view->current_page;
 438         } else if (view->continuous) {
 439                 GdkRectangle current_area, unused, page_area;
 440                 GtkBorder border;
 441                 gboolean found = FALSE;
 442                 gint area_max = -1, area;
 443                 int i;
 444
 445                 if (!(view->vadjustment && view->hadjustment))
 446                         return;
 447
 448                 current_area.x = view->hadjustment->value;
 449                 current_area.width = view->hadjustment->upper;
 450                 current_area.y = view->vadjustment->value;
 451                 current_area.height = view->vadjustment->page_size;
 452
 453                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 454
 455                         get_page_extents (view, i, &page_area, &border);
 456
 457                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 458                                 area = unused.width * unused.height;
 459
 460                                 if (!found) {
 461                                         area_max = area;
 462                                         view->start_page = i;
 463                                         found = TRUE;
 464                                         best_current_page = i;
 465                                 }
 466                                 if (area > area_max) {
 467                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 468                                         area_max = area;
 469                                 }
 470
 471                                 view->end_page = i;
 472                         } else if (found) {
 473                                 break;
 474                         }
 475                 }
 476
 477         } else if (view->dual_page) {
 478                 if (view->current_page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) {
 479                         view->start_page = view->current_page;
 480                         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 481                                 view->end_page = view->start_page + 1;
 482                         else
 483                                 view->end_page = view->start_page;
 484                 } else {
 485                         if (view->current_page < 1)
 486                                 view->start_page = view->current_page;
 487                         else
 488                                 view->start_page = view->current_page - 1;
 489                         view->end_page = view->current_page;
 490                 }
 491         } else {
 492                 view->start_page = view->current_page;
 493                 view->end_page = view->current_page;
 494         }
 495
 496         best_current_page = MAX (best_current_page, view->start_page);
 497         current_page = ev_page_cache_get_current_page (view->page_cache);
 498
 499         if (current_page != best_current_page) {
 500                 view->current_page = best_current_page;
 501                 ev_page_cache_set_current_page (view->page_cache, best_current_page);
 502         }
 503
 504         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 505                                         view->start_page,
 506                                         view->end_page,
 507                                         view->rotation,
 508                                         view->scale,
 509                                         view->selection_info.selections);
 510 }
 511
 512 static void
 513 set_scroll_adjustment (EvView *view,
 514                        GtkOrientation  orientation,
 515                        GtkAdjustment  *adjustment)
 516 {
 517         GtkAdjustment **to_set;
 518
 519         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 520                 to_set = &view->hadjustment;
 521         else
 522                 to_set = &view->vadjustment;
 523
 524         if (*to_set != adjustment) {
 525                 if (*to_set) {
 526                         g_signal_handlers_disconnect_by_func (*to_set,
 527                                                               (gpointer) on_adjustment_value_changed,
 528                                                               view);
 529                         g_object_unref (*to_set);
 530                 }
 531
 532                 *to_set = adjustment;
 533                 view_set_adjustment_values (view, orientation);
 534
 535                 if (*to_set) {
 536                         g_object_ref (*to_set);
 537                         g_signal_connect (*to_set, "value_changed",
 538                                           G_CALLBACK (on_adjustment_value_changed), view);
 539                 }
 540         }
 541 }
 542
 543 static void
 544 ev_view_set_scroll_adjustments (EvView *view,
 545                                 GtkAdjustment  *hadjustment,
 546                                 GtkAdjustment  *vadjustment)
 547 {
 548         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 549         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 550
 551         on_adjustment_value_changed (NULL, view);
 552 }
 553
 554 static void
 555 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 556                            guint           keyval,
 557                            GdkModifierType modifiers,
 558                            EvScrollType    scroll,
 559                            gboolean        horizontal)
 560 {
 561   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 562
 563   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 564                                 "binding_activated", 2,
 565                                 EV_TYPE_SCROLL_TYPE, scroll,
 566                                 G_TYPE_BOOLEAN, horizontal);
 567   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 568                                 "binding_activated", 2,
 569                                 EV_TYPE_SCROLL_TYPE, scroll,
 570                                 G_TYPE_BOOLEAN, horizontal);
 571 }
 572
 573 void
 574 ev_view_scroll (EvView        *view,
 575                 EvScrollType   scroll,
 576                 gboolean horizontal)
 577 {
 578         GtkAdjustment *adjustment;
 579         double value, increment;
 580         gboolean first_page = FALSE;
 581         gboolean last_page = FALSE;
 582
 583         view->jump_to_find_result = FALSE;
 584
 585         if (view->presentation) {
 586                 switch (scroll) {
 587                         case EV_SCROLL_PAGE_BACKWARD:
 588                         case EV_SCROLL_STEP_BACKWARD:
 589                                 ev_view_previous_page (view);
 590                                 break;
 591                         case EV_SCROLL_PAGE_FORWARD:
 592                         case EV_SCROLL_STEP_FORWARD:
 593                                 ev_view_next_page (view);
 594                                 break;
 595                         default:
 596                                 break;
 597                 }
 598                 return;
 599         }
 600
 601         /* Assign values for increment and vertical adjustment */
 602         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 603         increment = adjustment->page_size * 0.75;
 604         value = adjustment->value;
 605
 606         /* Assign boolean for first and last page */
 607         if (view->current_page == 0)
 608                 first_page = TRUE;
 609         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 610                 last_page = TRUE;
 611
 612         switch (scroll) {
 613                 case EV_SCROLL_PAGE_BACKWARD:
 614                         /* Do not jump backwards if at the first page */
 615                         if (value == (adjustment->lower) && first_page) {
 616                                 /* Do nothing */
 617                                 /* At the top of a page, assign the upper bound limit of previous page */
 618                         } else if (value == (adjustment->lower)) {
 619                                 value = adjustment->upper - adjustment->page_size;
 620                                 ev_view_previous_page (view);
 621                                 /* Jump to the top */
 622                         } else {
 623                                 value = MAX (value - increment, adjustment->lower);
 624                         }
 625                         break;
 626                 case EV_SCROLL_PAGE_FORWARD:
 627                         /* Do not jump forward if at the last page */
 628                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 629                                 /* Do nothing */
 630                         /* At the bottom of a page, assign the lower bound limit of next page */
 631                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 632                                 value = 0;
 633                                 ev_view_next_page (view);
 634                         /* Jump to the bottom */
 635                         } else {
 636                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 637                         }
 638                         break;
 639                 case EV_SCROLL_STEP_BACKWARD:
 640                         value -= adjustment->step_increment;
 641                         break;
 642                 case EV_SCROLL_STEP_FORWARD:
 643                         value += adjustment->step_increment;
 644                         break;
 645                 case EV_SCROLL_STEP_DOWN:
 646                         value -= adjustment->step_increment / 10;
 647                         break;
 648                 case EV_SCROLL_STEP_UP:
 649                         value += adjustment->step_increment / 10;
 650                         break;
 651                 default:
 652                         break;
 653         }
 654
 655         value = CLAMP (value, adjustment->lower,
 656                        adjustment->upper - adjustment->page_size);
 657
 658         gtk_adjustment_set_value (adjustment, value);
 659 }
 660
 661 #define MARGIN 5
 662
 663 static void
 664 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 665 {
 666         GtkWidget *widget = GTK_WIDGET (view);
 667         GtkAdjustment *adjustment;
 668         int value;
 669
 670         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
 671
 672         adjustment = view->vadjustment;
 673
 674         if (rect->y < adjustment->value) {
 675                 value = MAX (adjustment->lower, rect->y - MARGIN);
 676                 gtk_adjustment_set_value (view->vadjustment, value);
 677         } else if (rect->y + rect->height >
 678                    adjustment->value + widget->allocation.height) {
 679                 value = MIN (adjustment->upper, rect->y + rect->height -
 680                              widget->allocation.height + MARGIN);
 681                 gtk_adjustment_set_value (view->vadjustment, value);
 682         }
 683
 684         adjustment = view->hadjustment;
 685
 686         if (rect->x < adjustment->value) {
 687                 value = MAX (adjustment->lower, rect->x - MARGIN);
 688                 gtk_adjustment_set_value (view->hadjustment, value);
 689         } else if (rect->x + rect->height >
 690                    adjustment->value + widget->allocation.width) {
 691                 value = MIN (adjustment->upper, rect->x + rect->width -
 692                              widget->allocation.width + MARGIN);
 693                 gtk_adjustment_set_value (view->hadjustment, value);
 694         }
 695 }
 696
 697 /*** Geometry computations ***/
 698
 699 static void
 700 compute_border (EvView *view, int width, int height, GtkBorder *border)
 701 {
 702         if (view->presentation) {
 703                 border->left = 0;
 704                 border->right = 0;
 705                 border->top = 0;
 706                 border->bottom = 0;
 707         } else {
 708                 ev_document_misc_get_page_border_size (width, height, border);
 709         }
 710 }
 711
 712 static void
 713 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 714 {
 715         int max_width, offset;
 716         GtkBorder border;
 717
 718         g_return_if_fail (y_offset != NULL);
 719
 720         ev_page_cache_get_max_width (view->page_cache, view->rotation, zoom, &max_width);
 721
 722         compute_border (view, max_width, max_width, &border);
 723
 724         if (view->dual_page) {
 725                 ev_page_cache_get_height_to_page (view->page_cache, page,
 726                                                   view->rotation, zoom, NULL, &offset);
 727                 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);
 728         } else {
 729                 ev_page_cache_get_height_to_page (view->page_cache, page,
 730                                                   view->rotation, zoom, &offset, NULL);
 731                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 732         }
 733
 734         *y_offset = offset;
 735         return;
 736 }
 737
 738 static gboolean
 739 get_page_extents (EvView       *view,
 740                   gint          page,
 741                   GdkRectangle *page_area,
 742                   GtkBorder    *border)
 743 {
 744         GtkWidget *widget;
 745         int width, height;
 746
 747         widget = GTK_WIDGET (view);
 748
 749         /* Get the size of the page */
 750         ev_page_cache_get_size (view->page_cache, page,
 751                                 view->rotation,
 752                                 view->scale,
 753                                 &width, &height);
 754         compute_border (view, width, height, border);
 755         page_area->width = width + border->left + border->right;
 756         page_area->height = height + border->top + border->bottom;
 757
 758         if (view->presentation) {
 759                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 760                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 761         } else if (view->continuous) {
 762                 gint max_width;
 763                 gint x, y;
 764
 765                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 766                                              view->scale, &max_width);
 767                 max_width = max_width + border->left + border->right;
 768                 /* Get the location of the bounding box */
 769                 if (view->dual_page) {
 770                         x = view->spacing + ((page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? 0 : 1) * (max_width + view->spacing);
 771                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 772                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 773                                 x = x + (max_width - width - border->left - border->right);
 774                 } else {
 775                         x = view->spacing;
 776                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 777                 }
 778
 779                 get_page_y_offset (view, page, view->scale, &y);
 780
 781                 page_area->x = x;
 782                 page_area->y = y;
 783         } else {
 784                 gint x, y;
 785                 if (view->dual_page) {
 786                         gint width_2, height_2;
 787                         gint max_width = width;
 788                         gint max_height = height;
 789                         GtkBorder overall_border;
 790                         gint other_page;
 791
 792                         other_page = (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? page + 1: page - 1;
 793
 794                         /* First, we get the bounding box of the two pages */
 795                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)
 796                             && (0 <= other_page)) {
 797                                 ev_page_cache_get_size (view->page_cache,
 798                                                         other_page,
 799                                                         view->rotation,
 800                                                         view->scale,
 801                                                         &width_2, &height_2);
 802                                 if (width_2 > width)
 803                                         max_width = width_2;
 804                                 if (height_2 > height)
 805                                         max_height = height_2;
 806                         }
 807                         compute_border (view, max_width, max_height, &overall_border);
 808
 809                         /* Find the offsets */
 810                         x = view->spacing;
 811                         y = view->spacing;
 812
 813                         /* Adjust for being the left or right page */
 814                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 815                                 x = x + max_width - width;
 816                         else
 817                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 818
 819                         y = y + (max_height - height)/2;
 820
 821                         /* Adjust for extra allocation */
 822                         x = x + MAX (0, widget->allocation.width -
 823                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 824                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 825                 } else {
 826                         x = view->spacing;
 827                         y = view->spacing;
 828
 829                         /* Adjust for extra allocation */
 830                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 831                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 832                 }
 833
 834                 page_area->x = x;
 835                 page_area->y = y;
 836         }
 837
 838         return TRUE;
 839 }
 840
 841 static void
 842 view_point_to_doc_point (EvView *view,
 843                          GdkPoint *view_point,
 844                          GdkRectangle *page_area,
 845                          double  *doc_point_x,
 846                          double  *doc_point_y)
 847 {
 848         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 849         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 850 }
 851
 852 static void
 853 view_rect_to_doc_rect (EvView *view,
 854                        GdkRectangle *view_rect,
 855                        GdkRectangle *page_area,
 856                        EvRectangle  *doc_rect)
 857 {
 858         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 859         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 860         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 861         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 862 }
 863
 864 static gboolean
 865 doc_point_to_view_point (EvView       *view,
 866                          int           page,
 867                          EvPoint      *doc_point,
 868                          GdkPoint     *view_point)
 869 {
 870         GdkRectangle page_area;
 871         GtkBorder border;
 872         double x, y, view_x, view_y;
 873         int width, height;
 874
 875         ev_page_cache_get_size (view->page_cache, page,
 876                                 view->rotation,
 877                                 1.0,
 878                                 &width, &height);
 879
 880         if (view->rotation == 0) {
 881                 x = doc_point->x;
 882                 y = doc_point->y;
 883         } else if (view->rotation == 90) {
 884                 x = width - doc_point->y;
 885                 y = doc_point->x;
 886         } else if (view->rotation == 180) {
 887                 x = width - doc_point->x;
 888                 y = height - doc_point->y;
 889         } else if (view->rotation == 270) {
 890                 x = doc_point->y;
 891                 y = height - doc_point->x;
 892         } else {
 893                 g_assert_not_reached ();
 894         }
 895
 896         get_page_extents (view, page, &page_area, &border);
 897
 898         view_x = x * view->scale;
 899         view_y = y * view->scale;
 900         view_point->x = view_x + page_area.x;
 901         view_point->y = view_y + page_area.y;
 902
 903         return (view_x > 0 && view_x <= page_area.width &&
 904                 view_y > 0 && view_y <= page_area.height);
 905 }
 906
 907 static void
 908 doc_rect_to_view_rect (EvView       *view,
 909                        int           page,
 910                        EvRectangle  *doc_rect,
 911                        GdkRectangle *view_rect)
 912 {
 913         GdkRectangle page_area;
 914         GtkBorder border;
 915         double x, y, w, h;
 916         int width, height;
 917
 918         ev_page_cache_get_size (view->page_cache, page,
 919                                 view->rotation,
 920                                 1.0,
 921                                 &width, &height);
 922
 923         if (view->rotation == 0) {
 924                 x = doc_rect->x1;
 925                 y = doc_rect->y1;
 926                 w = doc_rect->x2 - doc_rect->x1;
 927                 h = doc_rect->y2 - doc_rect->y1;
 928         } else if (view->rotation == 90) {
 929                 x = width - doc_rect->y2;
 930                 y = doc_rect->x1;
 931                 w = doc_rect->y2 - doc_rect->y1;
 932                 h = doc_rect->x2 - doc_rect->x1;
 933         } else if (view->rotation == 180) {
 934                 x = width - doc_rect->x2;
 935                 y = height - doc_rect->y2;
 936                 w = doc_rect->x2 - doc_rect->x1;
 937                 h = doc_rect->y2 - doc_rect->y1;
 938         } else if (view->rotation == 270) {
 939                 x = doc_rect->y1;
 940                 y = height - doc_rect->x2;
 941                 w = doc_rect->y2 - doc_rect->y1;
 942                 h = doc_rect->x2 - doc_rect->x1;
 943         } else {
 944                 g_assert_not_reached ();
 945         }
 946
 947         get_page_extents (view, page, &page_area, &border);
 948
 949         view_rect->x = x * view->scale + page_area.x;
 950         view_rect->y = y * view->scale + page_area.y;
 951         view_rect->width = w * view->scale;
 952         view_rect->height = h * view->scale;
 953 }
 954
 955 static void
 956 find_page_at_location (EvView  *view,
 957                        gdouble  x,
 958                        gdouble  y,
 959                        gint    *page,
 960                        gint    *x_offset,
 961                        gint    *y_offset)
 962 {
 963         int i;
 964
 965         if (view->document == NULL)
 966                 return;
 967
 968         g_assert (page);
 969         g_assert (x_offset);
 970         g_assert (y_offset);
 971
 972         for (i = view->start_page; i <= view->end_page; i++) {
 973                 GdkRectangle page_area;
 974                 GtkBorder border;
 975
 976                 if (! get_page_extents (view, i, &page_area, &border))
 977                         continue;
 978
 979                 if ((x >= page_area.x + border.left) &&
 980                     (x < page_area.x + page_area.width - border.right) &&
 981                     (y >= page_area.y + border.top) &&
 982                     (y < page_area.y + page_area.height - border.bottom)) {
 983                         *page = i;
 984                         *x_offset = x - (page_area.x + border.left);
 985                         *y_offset = y - (page_area.y + border.top);
 986                         return;
 987                 }
 988         }
 989
 990         *page = -1;
 991 }
 992
 993 static gboolean
 994 location_in_text (EvView  *view,
 995                   gdouble  x,
 996                   gdouble  y)
 997 {
 998         GdkRegion *region;
 999         gint page = -1;
1000         gint x_offset = 0, y_offset = 0;
1001
1002         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1003
1004         if (page == -1)
1005                 return FALSE;
1006
1007         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1008
1009         if (region)
1010                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1011         else
1012                 return FALSE;
1013 }
1014
1015 static int
1016 ev_view_get_width (EvView *view)
1017 {
1018         return GTK_WIDGET (view)->allocation.width;
1019 }
1020
1021 static int
1022 ev_view_get_height (EvView *view)
1023 {
1024         return GTK_WIDGET (view)->allocation.height;
1025 }
1026
1027 static gboolean
1028 location_in_selected_text (EvView  *view,
1029                            gdouble  x,
1030                            gdouble  y)
1031 {
1032         gint page = -1;
1033         gint x_offset = 0, y_offset = 0;
1034         EvViewSelection *selection;
1035         GList *l = NULL;
1036
1037         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1038                 selection = (EvViewSelection *)l->data;
1039
1040                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1041
1042                 if (page != selection->page)
1043                         continue;
1044
1045                 if (selection->covered_region &&
1046                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1047                         return TRUE;
1048         }
1049
1050         return FALSE;
1051 }
1052
1053 /*** Hyperref ***/
1054 static EvLink *
1055 ev_view_get_link_at_location (EvView  *view,
1056                               gdouble  x,
1057                               gdouble  y)
1058 {
1059         gint page = -1;
1060         gint x_offset = 0, y_offset = 0;
1061         GList *link_mapping;
1062
1063         x += view->scroll_x;
1064         y += view->scroll_y;
1065
1066         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1067
1068         if (page == -1)
1069                 return NULL;
1070
1071         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1072
1073         if (link_mapping)
1074                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
1075         else
1076                 return NULL;
1077 }
1078
1079 static void
1080 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1081 {
1082         EvPoint doc_point;
1083         double zoom;
1084
1085         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - ev_link_dest_get_left (dest),
1086                                        ev_link_dest_get_bottom (dest) - ev_link_dest_get_top (dest),
1087                                        ev_view_get_width (view),
1088                                        ev_view_get_height (view), 0, 0);
1089
1090         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1091         ev_view_set_zoom (view, zoom, FALSE);
1092
1093         doc_point.x = ev_link_dest_get_left (dest);
1094         doc_point.y = ev_link_dest_get_top (dest);
1095
1096         view->current_page = ev_link_dest_get_page (dest);
1097         view->pending_point = doc_point;
1098         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1099
1100         gtk_widget_queue_resize (GTK_WIDGET (view));
1101 }
1102
1103 static void
1104 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1105 {
1106         EvPoint doc_point;
1107         int doc_width, doc_height, page;
1108         double zoom;
1109
1110         page = ev_link_dest_get_page (dest);
1111         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1112
1113         doc_point.x = ev_link_dest_get_left (dest);
1114         doc_point.y = 0;
1115
1116         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1117                                          ev_view_get_width (view),
1118                                          ev_view_get_height (view), 0);
1119
1120         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1121         ev_view_set_zoom (view, zoom, FALSE);
1122
1123         view->current_page = page;
1124         view->pending_point = doc_point;
1125         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1126
1127         gtk_widget_queue_resize (GTK_WIDGET (view));
1128 }
1129
1130 static void
1131 goto_fith_dest (EvView *view, EvLinkDest *dest)
1132 {
1133         EvPoint doc_point;
1134         int doc_width, doc_height, page;
1135         double zoom;
1136
1137         page = ev_link_dest_get_page (dest);
1138         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1139
1140         doc_point.x = 0;
1141         doc_point.y = ev_link_dest_get_top (dest);
1142
1143         zoom = zoom_for_size_fit_width (doc_width, ev_link_dest_get_top (dest),
1144                                         ev_view_get_width (view),
1145                                         ev_view_get_height (view), 0);
1146
1147         ev_view_set_sizing_mode (view, EV_SIZING_FIT_WIDTH);
1148         ev_view_set_zoom (view, zoom, FALSE);
1149
1150         view->current_page = page;
1151         view->pending_point = doc_point;
1152         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1153
1154         gtk_widget_queue_resize (GTK_WIDGET (view));
1155 }
1156
1157 static void
1158 goto_fit_dest (EvView *view, EvLinkDest *dest)
1159 {
1160         double zoom;
1161         int doc_width, doc_height;
1162         int page;
1163
1164         page = ev_link_dest_get_page (dest);
1165         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1166
1167         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1168                                        ev_view_get_height (view), 0, 0);
1169
1170         ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
1171         ev_view_set_zoom (view, zoom, FALSE);
1172
1173         view->current_page = page;
1174         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1175
1176         gtk_widget_queue_resize (GTK_WIDGET (view));
1177 }
1178
1179 static void
1180 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1181 {
1182         EvPoint doc_point;
1183         gint page;
1184         double zoom;
1185
1186         zoom = ev_link_dest_get_zoom (dest);
1187         page = ev_link_dest_get_page (dest);
1188
1189         if (zoom > 1) {
1190                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1191                 ev_view_set_zoom (view, zoom, FALSE);
1192         }
1193
1194         doc_point.x = ev_link_dest_get_left (dest);
1195         doc_point.y = ev_link_dest_get_top (dest);
1196
1197         view->current_page = page;
1198         view->pending_point = doc_point;
1199         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1200
1201         gtk_widget_queue_resize (GTK_WIDGET (view));
1202 }
1203
1204 static void
1205 goto_dest (EvView *view, EvLinkDest *dest)
1206 {
1207         EvLinkDestType type;
1208         int page, n_pages;
1209
1210         page = ev_link_dest_get_page (dest);
1211         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1212
1213         if (page < 0 || page >= n_pages)
1214                 return;
1215
1216         type = ev_link_dest_get_dest_type (dest);
1217
1218         switch (type) {
1219                 case EV_LINK_DEST_TYPE_PAGE:
1220                         ev_page_cache_set_current_page (view->page_cache, page);
1221                         break;
1222                 case EV_LINK_DEST_TYPE_FIT:
1223                         goto_fit_dest (view, dest);
1224                         break;
1225                 case EV_LINK_DEST_TYPE_FITH:
1226                         goto_fith_dest (view, dest);
1227                         break;
1228                 case EV_LINK_DEST_TYPE_FITV:
1229                         goto_fitv_dest (view, dest);
1230                         break;
1231                 case EV_LINK_DEST_TYPE_FITR:
1232                         goto_fitr_dest (view, dest);
1233                         break;
1234                 case EV_LINK_DEST_TYPE_XYZ:
1235                         goto_xyz_dest (view, dest);
1236                         break;
1237                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1238                         ev_page_cache_set_page_label (view->page_cache, ev_link_dest_get_page_label (dest));
1239                         break;
1240                 default:
1241                         g_assert_not_reached ();
1242         }
1243 }
1244
1245 void
1246 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1247 {
1248         EvLinkDestType type;
1249
1250         type = ev_link_dest_get_dest_type (dest);
1251
1252         if (type == EV_LINK_DEST_TYPE_NAMED) {
1253                 EvLinkDest  *dest2;
1254                 const gchar *named_dest;
1255
1256                 named_dest = ev_link_dest_get_named_dest (dest);
1257                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1258                                                           named_dest);
1259                 if (dest2) {
1260                         goto_dest (view, dest2);
1261                         g_object_unref (dest2);
1262                 }
1263
1264                 return;
1265         }
1266
1267         goto_dest (view, dest);
1268 }
1269
1270 void
1271 ev_view_handle_link (EvView *view, EvLink *link)
1272 {
1273         EvLinkAction    *action = NULL;
1274         EvLinkActionType type;
1275
1276         action = ev_link_get_action (link);
1277         if (!action)
1278                 return;
1279
1280         type = ev_link_action_get_action_type (action);
1281
1282         switch (type) {
1283                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1284                         EvLinkDest *dest;
1285
1286                         dest = ev_link_action_get_dest (action);
1287                         ev_view_goto_dest (view, dest);
1288                 }
1289                         break;
1290                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1291                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1292                 case EV_LINK_ACTION_TYPE_LAUNCH:
1293                 case EV_LINK_ACTION_TYPE_NAMED:
1294                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1295                         break;
1296         }
1297 }
1298
1299 static gchar *
1300 page_label_from_dest (EvView *view, EvLinkDest *dest)
1301 {
1302         EvLinkDestType type;
1303         gchar *msg = NULL;
1304
1305         type = ev_link_dest_get_dest_type (dest);
1306
1307         switch (type) {
1308                 case EV_LINK_DEST_TYPE_NAMED: {
1309                         EvLinkDest  *dest2;
1310                         const gchar *named_dest;
1311
1312                         named_dest = ev_link_dest_get_named_dest (dest);
1313                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1314                                                                   named_dest);
1315                         if (dest2) {
1316                                 msg = ev_page_cache_get_page_label (view->page_cache,
1317                                                                     ev_link_dest_get_page (dest2));
1318                                 g_object_unref (dest2);
1319                         }
1320                 }
1321
1322                         break;
1323                 default:
1324                         msg = ev_page_cache_get_page_label (view->page_cache,
1325                                                             ev_link_dest_get_page (dest));
1326         }
1327
1328         return msg;
1329 }
1330
1331 static char *
1332 tip_from_action_named (EvLinkAction *action)
1333 {
1334         const gchar *name = ev_link_action_get_name (action);
1335
1336         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1337                 return g_strdup (_("Go to first page"));
1338         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1339                 return g_strdup (_("Go to previous page"));
1340         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1341                 return g_strdup (_("Go to next page"));
1342         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1343                 return g_strdup (_("Go to last page"));
1344         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1345                 return g_strdup (_("Go to page"));
1346         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1347                 return g_strdup (_("Find"));
1348         }
1349
1350         return NULL;
1351 }
1352
1353 static char *
1354 tip_from_link (EvView *view, EvLink *link)
1355 {
1356         EvLinkAction *action;
1357         EvLinkActionType type;
1358         char *msg = NULL;
1359         char *page_label;
1360         const char *title;
1361
1362         action = ev_link_get_action (link);
1363         title = ev_link_get_title (link);
1364
1365         if (!action)
1366                 return title ? g_strdup (title) : NULL;
1367
1368         type = ev_link_action_get_action_type (action);
1369
1370         switch (type) {
1371                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1372                         page_label = page_label_from_dest (view,
1373                                                            ev_link_action_get_dest (action));
1374                         msg = g_strdup_printf (_("Go to page %s"), page_label);
1375                         g_free (page_label);
1376                         break;
1377                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1378                         if (title) {
1379                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1380                                                        ev_link_action_get_filename (action));
1381                         } else {
1382                                 msg = g_strdup_printf (_("Go to file “%s”"),
1383                                                        ev_link_action_get_filename (action));
1384                         }
1385
1386                         break;
1387                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1388                         msg = g_strdup (ev_link_action_get_uri (action));
1389                         break;
1390                 case EV_LINK_ACTION_TYPE_LAUNCH:
1391                         msg = g_strdup_printf (_("Launch %s"),
1392                                                ev_link_action_get_filename (action));
1393                         break;
1394                 case EV_LINK_ACTION_TYPE_NAMED:
1395                         msg = tip_from_action_named (action);
1396                         break;
1397                 default:
1398                         if (title)
1399                                 msg = g_strdup (title);
1400                         break;
1401         }
1402
1403         return msg;
1404 }
1405
1406 static void
1407 handle_link_over_xy (EvView *view, gint x, gint y)
1408 {
1409         EvLink *link;
1410
1411         link = ev_view_get_link_at_location (view, x, y);
1412
1413         if (view->link_tooltip == NULL) {
1414                 view->link_tooltip = ev_tooltip_new (GTK_WIDGET (view));
1415         }
1416
1417         if (view->hovered_link != link) {
1418                 view->hovered_link = link;
1419                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
1420         }
1421
1422         if (link) {
1423                 char *msg = tip_from_link (view, link);
1424
1425                 if (msg && g_utf8_validate (msg, -1, NULL)) {
1426                         EvTooltip *tooltip = EV_TOOLTIP (view->link_tooltip);
1427
1428                         ev_tooltip_set_position (tooltip, x, y);
1429                         ev_tooltip_set_text (tooltip, msg);
1430                         ev_tooltip_activate (tooltip);
1431                 }
1432                 g_free (msg);
1433
1434                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1435         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1436                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1437         } else {
1438                 ev_view_set_status (view, NULL);
1439                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1440                     view->cursor == EV_VIEW_CURSOR_IBEAM)
1441                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1442         }
1443         return;
1444 }
1445
1446 /*** GtkWidget implementation ***/
1447
1448 static void
1449 ev_view_size_request_continuous_dual_page (EvView         *view,
1450                                            GtkRequisition *requisition)
1451 {
1452         int max_width;
1453         gint n_pages;
1454         GtkBorder border;
1455
1456         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1457                                      view->scale, &max_width);
1458         compute_border (view, max_width, max_width, &border);
1459
1460         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
1461
1462         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
1463         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1464
1465         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1466                 requisition->width = 1;
1467         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1468                 requisition->width = 1;
1469                 /* FIXME: This could actually be set on one page docs or docs
1470                  * with a strange aspect ratio. */
1471                 /* requisition->height = 1;*/
1472         }
1473 }
1474
1475 static void
1476 ev_view_size_request_continuous (EvView         *view,
1477                                  GtkRequisition *requisition)
1478 {
1479         int max_width;
1480         int n_pages;
1481         GtkBorder border;
1482
1483
1484         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1485                                      view->scale, &max_width);
1486         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1487         compute_border (view, max_width, max_width, &border);
1488
1489         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
1490         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1491
1492         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1493                 requisition->width = 1;
1494         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1495                 requisition->width = 1;
1496                 /* FIXME: This could actually be set on one page docs or docs
1497                  * with a strange aspect ratio. */
1498                 /* requisition->height = 1;*/
1499         }
1500 }
1501
1502 static void
1503 ev_view_size_request_dual_page (EvView         *view,
1504                                 GtkRequisition *requisition)
1505 {
1506         GtkBorder border;
1507         gint width, height;
1508
1509         /* Find the largest of the two. */
1510         ev_page_cache_get_size (view->page_cache,
1511                                 view->current_page,
1512                                 view->rotation,
1513                                 view->scale,
1514                                 &width, &height);
1515         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1516                 gint width_2, height_2;
1517                 ev_page_cache_get_size (view->page_cache,
1518                                         view->current_page + 1,
1519                                         view->rotation,
1520                                         view->scale,
1521                                         &width_2, &height_2);
1522                 if (width_2 > width) {
1523                         width = width_2;
1524                         height = height_2;
1525                 }
1526         }
1527         compute_border (view, width, height, &border);
1528
1529         requisition->width = ((width + border.left + border.right) * 2) +
1530                 (view->spacing * 3);
1531         requisition->height = (height + border.top + border.bottom) +
1532                 (view->spacing * 2);
1533
1534         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1535                 requisition->width = 1;
1536         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1537                 requisition->width = 1;
1538                 requisition->height = 1;
1539         }
1540 }
1541
1542 static void
1543 ev_view_size_request_single_page (EvView         *view,
1544                                   GtkRequisition *requisition)
1545 {
1546         GtkBorder border;
1547         gint width, height;
1548
1549         ev_page_cache_get_size (view->page_cache,
1550                                 view->current_page,
1551                                 view->rotation,
1552                                 view->scale,
1553                                 &width, &height);
1554         compute_border (view, width, height, &border);
1555
1556         requisition->width = width + border.left + border.right + (2 * view->spacing);
1557         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1558
1559         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1560                 requisition->width = 1;
1561                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1562         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1563                 requisition->width = 1;
1564                 requisition->height = 1;
1565         }
1566 }
1567
1568 static void
1569 ev_view_size_request (GtkWidget      *widget,
1570                       GtkRequisition *requisition)
1571 {
1572         EvView *view = EV_VIEW (widget);
1573
1574         if (view->document == NULL) {
1575                 requisition->width = 1;
1576                 requisition->height = 1;
1577                 return;
1578         }
1579
1580         if (view->presentation) {
1581                 requisition->width = 1;
1582                 requisition->height = 1;
1583                 return;
1584         }
1585
1586         if (view->continuous && view->dual_page)
1587                 ev_view_size_request_continuous_dual_page (view, requisition);
1588         else if (view->continuous)
1589                 ev_view_size_request_continuous (view, requisition);
1590         else if (view->dual_page)
1591                 ev_view_size_request_dual_page (view, requisition);
1592         else
1593                 ev_view_size_request_single_page (view, requisition);
1594 }
1595
1596 static void
1597 ev_view_size_allocate (GtkWidget      *widget,
1598                        GtkAllocation  *allocation)
1599 {
1600         EvView *view = EV_VIEW (widget);
1601
1602         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1603             view->sizing_mode == EV_SIZING_BEST_FIT) {
1604
1605                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1606
1607                 ev_view_size_request (widget, &widget->requisition);
1608         }
1609
1610         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1611         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1612
1613         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1614         view->pending_resize = FALSE;
1615
1616         if (view->document)
1617                 view_update_range_and_current_page (view);
1618
1619         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1620 }
1621
1622 static void
1623 ev_view_realize (GtkWidget *widget)
1624 {
1625         EvView *view = EV_VIEW (widget);
1626         GdkWindowAttr attributes;
1627
1628         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1629
1630
1631         attributes.window_type = GDK_WINDOW_CHILD;
1632         attributes.wclass = GDK_INPUT_OUTPUT;
1633         attributes.visual = gtk_widget_get_visual (widget);
1634         attributes.colormap = gtk_widget_get_colormap (widget);
1635
1636         attributes.x = widget->allocation.x;
1637         attributes.y = widget->allocation.y;
1638         attributes.width = widget->allocation.width;
1639         attributes.height = widget->allocation.height;
1640         attributes.event_mask = GDK_EXPOSURE_MASK |
1641                                 GDK_BUTTON_PRESS_MASK |
1642                                 GDK_BUTTON_RELEASE_MASK |
1643                                 GDK_SCROLL_MASK |
1644                                 GDK_KEY_PRESS_MASK |
1645                                 GDK_POINTER_MOTION_MASK |
1646                                 GDK_POINTER_MOTION_HINT_MASK |
1647                                 GDK_ENTER_NOTIFY_MASK |
1648                                 GDK_LEAVE_NOTIFY_MASK;
1649
1650         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1651                                          &attributes,
1652                                          GDK_WA_X | GDK_WA_Y |
1653                                          GDK_WA_COLORMAP |
1654                                          GDK_WA_VISUAL);
1655         gdk_window_set_user_data (widget->window, widget);
1656         widget->style = gtk_style_attach (widget->style, widget->window);
1657
1658         if (view->presentation)
1659                 gdk_window_set_background (widget->window, &widget->style->black);
1660         else
1661                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1662 }
1663
1664 static gboolean
1665 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1666 {
1667         EvView *view = EV_VIEW (widget);
1668         guint state;
1669
1670         state = event->state & gtk_accelerator_get_default_mod_mask ();
1671
1672         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
1673                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1674
1675                 if (event->direction == GDK_SCROLL_UP ||
1676                     event->direction == GDK_SCROLL_LEFT) {
1677                         if (ev_view_can_zoom_in (view)) {
1678                                 ev_view_zoom_in (view);
1679                         }
1680                 } else {
1681                         if (ev_view_can_zoom_out (view)) {
1682                                 ev_view_zoom_out (view);
1683                         }
1684                 }
1685
1686                 return TRUE;
1687         }
1688
1689         view->jump_to_find_result = FALSE;
1690         /* Shift+Wheel scrolls the in the perpendicular direction */
1691         if (state & GDK_SHIFT_MASK) {
1692                 if (event->direction == GDK_SCROLL_UP)
1693                         event->direction = GDK_SCROLL_LEFT;
1694                 if (event->direction == GDK_SCROLL_LEFT)
1695                         event->direction = GDK_SCROLL_UP;
1696                 if (event->direction == GDK_SCROLL_DOWN)
1697                         event->direction = GDK_SCROLL_RIGHT;
1698                 if (event->direction == GDK_SCROLL_RIGHT)
1699                         event->direction = GDK_SCROLL_DOWN;
1700
1701                 event->state &= ~GDK_SHIFT_MASK;
1702                 state &= ~GDK_SHIFT_MASK;
1703         }
1704
1705         if (state == 0 && view->presentation) {
1706                 switch (event->direction) {
1707                         case GDK_SCROLL_DOWN:
1708                         case GDK_SCROLL_RIGHT:
1709                                 ev_view_next_page (view);
1710                                 break;
1711                         case GDK_SCROLL_UP:
1712                         case GDK_SCROLL_LEFT:
1713                                 ev_view_previous_page (view);
1714                                 break;
1715                 }
1716
1717                 return TRUE;
1718         }
1719
1720         return FALSE;
1721 }
1722
1723 static EvViewSelection *
1724 find_selection_for_page (EvView *view,
1725                          gint    page)
1726 {
1727         GList *list;
1728
1729         for (list = view->selection_info.selections; list != NULL; list = list->next) {
1730                 EvViewSelection *selection;
1731
1732                 selection = (EvViewSelection *) list->data;
1733
1734                 if (selection->page == page)
1735                         return selection;
1736         }
1737
1738         return NULL;
1739 }
1740
1741 static gboolean
1742 ev_view_expose_event (GtkWidget      *widget,
1743                       GdkEventExpose *event)
1744 {
1745         EvView *view = EV_VIEW (widget);
1746         int i;
1747
1748         if (view->loading) {
1749                 GdkRectangle area = {0};
1750
1751                 area.width = widget->allocation.width;
1752                 area.height = widget->allocation.height;
1753
1754                 draw_loading_text (view,
1755                                    &area,
1756                                    &(event->area));
1757         }
1758
1759         if (view->document == NULL)
1760                 return FALSE;
1761
1762         for (i = view->start_page; i <= view->end_page; i++) {
1763                 GdkRectangle page_area;
1764                 GtkBorder border;
1765                 gboolean page_ready = TRUE;
1766
1767                 if (!get_page_extents (view, i, &page_area, &border))
1768                         continue;
1769
1770                 page_area.x -= view->scroll_x;
1771                 page_area.y -= view->scroll_y;
1772
1773                 draw_one_page (view, i, &page_area, &border, &(event->area), &page_ready);
1774
1775                 if (page_ready && EV_IS_DOCUMENT_FIND (view->document))
1776                         highlight_find_results (view, i);
1777         }
1778
1779         return FALSE;
1780 }
1781
1782 static gboolean
1783 ev_view_popup_menu (GtkWidget *widget)
1784 {
1785     gint x, y;
1786     EvLink *link;
1787     EvView *view = EV_VIEW (widget);
1788
1789     gtk_widget_get_pointer (widget, &x, &y);
1790     link = ev_view_get_link_at_location (view, x, y);
1791     g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
1792     return TRUE;
1793 }
1794
1795 static gboolean
1796 ev_view_button_press_event (GtkWidget      *widget,
1797                             GdkEventButton *event)
1798 {
1799         EvView *view = EV_VIEW (widget);
1800         EvLink *link;
1801
1802         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1803                 gtk_widget_grab_focus (widget);
1804         }
1805
1806         view->pressed_button = event->button;
1807         view->selection_info.in_drag = FALSE;
1808
1809         switch (event->button) {
1810                 case 1:
1811                         if (view->selection_info.selections) {
1812                                 if (location_in_selected_text (view,
1813                                                                event->x + view->scroll_x,
1814                                                                event->y + view->scroll_y)) {
1815                                         view->selection_info.in_drag = TRUE;
1816                                 } else {
1817                                         clear_selection (view);
1818                                 }
1819
1820                                 gtk_widget_queue_draw (widget);
1821                         }
1822
1823                         view->selection_info.start.x = event->x + view->scroll_x;
1824                         view->selection_info.start.y = event->y + view->scroll_y;
1825
1826                         return TRUE;
1827                 case 2:
1828                         /* use root coordinates as reference point because
1829                          * scrolling changes window relative coordinates */
1830                         view->drag_info.start.x = event->x_root;
1831                         view->drag_info.start.y = event->y_root;
1832                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1833                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1834
1835                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1836
1837                         return TRUE;
1838                 case 3:
1839                         link = ev_view_get_link_at_location (view, event->x, event->y);
1840                         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
1841                         return TRUE;
1842         }
1843
1844         return FALSE;
1845 }
1846
1847 static void
1848 ev_view_drag_data_get (GtkWidget        *widget,
1849                        GdkDragContext   *context,
1850                        GtkSelectionData *selection_data,
1851                        guint             info,
1852                        guint             time)
1853 {
1854         EvView *view = EV_VIEW (widget);
1855
1856         if (view->selection_info.selections &&
1857             ev_document_can_get_text (view->document)) {
1858                 gchar *text;
1859
1860                 text = get_selected_text (view);
1861
1862                 gtk_selection_data_set_text (selection_data, text, strlen (text));
1863
1864                 g_free (text);
1865         }
1866 }
1867
1868 static gboolean
1869 selection_update_idle_cb (EvView *view)
1870 {
1871         compute_selections (view, &view->selection_info.start, &view->motion);
1872         view->selection_update_id = 0;
1873         return FALSE;
1874 }
1875
1876 static gboolean
1877 selection_scroll_timeout_cb (EvView *view)
1878 {
1879         gint x, y, shift = 0;
1880         GtkWidget *widget = GTK_WIDGET (view);
1881
1882         gtk_widget_get_pointer (widget, &x, &y);
1883
1884         if (y > widget->allocation.height) {
1885                 shift = (y - widget->allocation.height) / 2;
1886         } else if (y < 0) {
1887                 shift = y / 2;
1888         }
1889
1890         if (shift)
1891                 gtk_adjustment_set_value (view->vadjustment,
1892                                           CLAMP (view->vadjustment->value + shift,
1893                                           view->vadjustment->lower,
1894                                           view->vadjustment->upper -
1895                                           view->vadjustment->page_size));
1896
1897         if (x > widget->allocation.width) {
1898                 shift = (x - widget->allocation.width) / 2;
1899         } else if (x < 0) {
1900                 shift = x / 2;
1901         }
1902
1903         if (shift)
1904                 gtk_adjustment_set_value (view->hadjustment,
1905                                           CLAMP (view->hadjustment->value + shift,
1906                                           view->hadjustment->lower,
1907                                           view->hadjustment->upper -
1908                                           view->hadjustment->page_size));
1909
1910         return TRUE;
1911 }
1912
1913 static gboolean
1914 ev_view_motion_notify_event (GtkWidget      *widget,
1915                              GdkEventMotion *event)
1916 {
1917         EvView *view = EV_VIEW (widget);
1918         gint x, y;
1919
1920         if (!view->document)
1921                 return FALSE;
1922
1923         if (event->is_hint || event->window != widget->window) {
1924             gtk_widget_get_pointer (widget, &x, &y);
1925         } else {
1926             x = event->x;
1927             y = event->y;
1928         }
1929
1930         if (view->selection_info.in_drag) {
1931                 if (gtk_drag_check_threshold (widget,
1932                                               view->selection_info.start.x,
1933                                               view->selection_info.start.y,
1934                                               x, y)) {
1935                         GdkDragContext *context;
1936                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
1937
1938                         gtk_target_list_add_text_targets (target_list, 0);
1939
1940                         context = gtk_drag_begin (widget, target_list,
1941                                                   GDK_ACTION_COPY,
1942                                                   1, (GdkEvent *)event);
1943
1944                         view->selection_info.in_drag = FALSE;
1945
1946                         gtk_target_list_unref (target_list);
1947
1948                         return TRUE;
1949                 }
1950         }
1951
1952         /* For the Evince 0.4.x release, we limit selection to un-rotated
1953          * documents only.
1954          */
1955         if (view->pressed_button == 1 && view->rotation == 0) {
1956
1957                 /* Schedule timeout to scroll during selection and additionally
1958                  * scroll once to allow arbitrary speed. */
1959                 if (!view->selection_scroll_id)
1960                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME, (GSourceFunc)selection_scroll_timeout_cb, view);
1961                 else
1962                     selection_scroll_timeout_cb (view);
1963
1964                 view->selection_info.in_selection = TRUE;
1965                 view->motion.x = x + view->scroll_x;
1966                 view->motion.y = y + view->scroll_y;
1967
1968                 /* Queue an idle to handle the motion.  We do this because
1969                  * handling any selection events in the motion could be slower
1970                  * than new motion events reach us.  We always put it in the
1971                  * idle to make sure we catch up and don't visibly lag the
1972                  * mouse. */
1973                 if (!view->selection_update_id)
1974                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
1975
1976                 return TRUE;
1977         } else if (view->pressed_button == 2) {
1978                 if (!view->drag_info.in_drag) {
1979                         gboolean start;
1980
1981                         start = gtk_drag_check_threshold (widget,
1982                                                           view->drag_info.start.x,
1983                                                           view->drag_info.start.y,
1984                                                           event->x_root,
1985                                                           event->y_root);
1986                         view->drag_info.in_drag = start;
1987                 }
1988
1989                 if (view->drag_info.in_drag) {
1990                         int dx, dy;
1991                         gdouble dhadj_value, dvadj_value;
1992
1993                         dx = event->x_root - view->drag_info.start.x;
1994                         dy = event->y_root - view->drag_info.start.y;
1995
1996                         dhadj_value = view->hadjustment->page_size *
1997                                       (gdouble)dx / widget->allocation.width;
1998                         dvadj_value = view->vadjustment->page_size *
1999                                       (gdouble)dy / widget->allocation.height;
2000
2001                         /* clamp scrolling to visible area */
2002                         gtk_adjustment_set_value (view->hadjustment,
2003                                                   MIN(view->drag_info.hadj - dhadj_value,
2004                                                       view->hadjustment->upper -
2005                                                       view->hadjustment->page_size));
2006                         gtk_adjustment_set_value (view->vadjustment,
2007                                                   MIN(view->drag_info.vadj - dvadj_value,
2008                                                       view->vadjustment->upper -
2009                                                       view->vadjustment->page_size));
2010
2011                         return TRUE;
2012                 }
2013         /* For the Evince 0.4.x release, we limit links to un-rotated documents
2014          * only.
2015          */
2016         } else if (view->pressed_button <= 0 &&
2017                    view->rotation == 0) {
2018                 handle_link_over_xy (view, x, y);
2019                 return TRUE;
2020         }
2021
2022         return FALSE;
2023 }
2024
2025 static gboolean
2026 ev_view_button_release_event (GtkWidget      *widget,
2027                               GdkEventButton *event)
2028 {
2029         EvView *view = EV_VIEW (widget);
2030         EvLink *link;
2031
2032         if (view->pressed_button == 2) {
2033                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
2034         }
2035
2036         if (view->document) {
2037                 link = ev_view_get_link_at_location (view, event->x, event->y);
2038         } else {
2039                 link = NULL;
2040         }
2041
2042         view->pressed_button = -1;
2043         view->drag_info.in_drag = FALSE;
2044
2045         if (view->selection_scroll_id) {
2046             g_source_remove (view->selection_scroll_id);
2047             view->selection_scroll_id = 0;
2048         }
2049         if (view->selection_update_id) {
2050             g_source_remove (view->selection_update_id);
2051             view->selection_update_id = 0;
2052         }
2053
2054         if (view->selection_info.selections) {
2055                 ev_view_update_primary_selection (view);
2056
2057                 if (view->selection_info.in_drag) {
2058                         clear_selection (view);
2059                         gtk_widget_queue_draw (widget);
2060                 }
2061
2062                 view->selection_info.in_drag = FALSE;
2063         } else if (link) {
2064                 ev_view_handle_link (view, link);
2065         } else if (view->presentation) {
2066                 switch (event->button) {
2067                         case 1:
2068                                 ev_view_next_page (view);
2069                                 return TRUE;
2070                         case 3:
2071                                 ev_view_previous_page (view);
2072                                 return TRUE;
2073                 }
2074         }
2075
2076         return FALSE;
2077 }
2078
2079 static gint
2080 ev_view_focus_in (GtkWidget     *widget,
2081                   GdkEventFocus *event)
2082 {
2083         if (EV_VIEW (widget)->pixbuf_cache)
2084                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
2085         gtk_widget_queue_draw (widget);
2086
2087         return FALSE;
2088 }
2089
2090 static gint
2091 ev_view_focus_out (GtkWidget     *widget,
2092                      GdkEventFocus *event)
2093 {
2094         if (EV_VIEW (widget)->pixbuf_cache)
2095                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
2096         gtk_widget_queue_draw (widget);
2097
2098         return FALSE;
2099 }
2100
2101 static gboolean
2102 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
2103 {
2104         EvView *view = EV_VIEW (widget);
2105
2106         ev_view_set_status (view, NULL);
2107
2108         if (view->cursor == EV_VIEW_CURSOR_LINK ||
2109             view->cursor == EV_VIEW_CURSOR_IBEAM)
2110                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
2111
2112         if (view->link_tooltip) {
2113                 view->hovered_link = NULL;
2114                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
2115         }
2116
2117         return FALSE;
2118 }
2119
2120 static gboolean
2121 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
2122 {
2123         EvView *view = EV_VIEW (widget);
2124
2125         handle_link_over_xy (view, event->x, event->y);
2126
2127         return FALSE;
2128 }
2129
2130 static void
2131 ev_view_style_set (GtkWidget *widget,
2132                    GtkStyle  *old_style)
2133 {
2134         if (EV_VIEW (widget)->pixbuf_cache)
2135                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
2136
2137         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
2138 }
2139
2140 /*** Drawing ***/
2141
2142 static guint32
2143 ev_gdk_color_to_rgb (const GdkColor *color)
2144 {
2145   guint32 result;
2146   result = (0xff0000 | (color->red & 0xff00));
2147   result <<= 8;
2148   result |= ((color->green & 0xff00) | (color->blue >> 8));
2149   return result;
2150 }
2151
2152 static void
2153 draw_rubberband (GtkWidget *widget, GdkWindow *window,
2154                  const GdkRectangle *rect, guchar alpha)
2155 {
2156         GdkGC *gc;
2157         GdkPixbuf *pixbuf;
2158         GdkColor *fill_color_gdk;
2159         guint fill_color;
2160
2161         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
2162         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
2163
2164         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
2165                                  rect->width, rect->height);
2166         gdk_pixbuf_fill (pixbuf, fill_color);
2167
2168         gdk_draw_pixbuf (window, NULL, pixbuf,
2169                          0, 0,
2170                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
2171                          rect->width, rect->height,
2172                          GDK_RGB_DITHER_NONE,
2173                          0, 0);
2174
2175         g_object_unref (pixbuf);
2176
2177         gc = gdk_gc_new (window);
2178         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
2179         gdk_draw_rectangle (window, gc, FALSE,
2180                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
2181                             rect->width - 1,
2182                             rect->height - 1);
2183         g_object_unref (gc);
2184
2185         gdk_color_free (fill_color_gdk);
2186 }
2187
2188
2189 static void
2190 highlight_find_results (EvView *view, int page)
2191 {
2192         EvDocumentFind *find;
2193         int i, results = 0;
2194
2195         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
2196
2197         find = EV_DOCUMENT_FIND (view->document);
2198
2199         results = ev_document_find_get_n_results (find, page);
2200
2201         for (i = 0; i < results; i++) {
2202                 EvRectangle rectangle;
2203                 GdkRectangle view_rectangle;
2204                 guchar alpha;
2205
2206                 if (i == view->find_result && page == view->current_page) {
2207                         alpha = 0x90;
2208                 } else {
2209                         alpha = 0x20;
2210                 }
2211
2212                 ev_document_find_get_result (find, page, i, &rectangle);
2213                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
2214                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
2215                                  &view_rectangle, alpha);
2216         }
2217 }
2218
2219 static void
2220 draw_loading_text (EvView       *view,
2221                    GdkRectangle *page_area,
2222                    GdkRectangle *expose_area)
2223 {
2224         PangoLayout *layout;
2225         PangoFontDescription *font_desc;
2226         PangoRectangle logical_rect;
2227         double real_scale;
2228         int target_width;
2229
2230         const char *loading_text = _("Loading...");
2231
2232         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
2233
2234         font_desc = pango_font_description_new ();
2235
2236
2237         /* We set the font to be 10 points, get the size, and scale appropriately */
2238         pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
2239         pango_layout_set_font_description (layout, font_desc);
2240         pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
2241
2242         /* Make sure we fit the middle of the page */
2243         target_width = MAX (page_area->width / 2, 1);
2244         real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
2245         pango_font_description_set_size (font_desc, (int)real_scale);
2246         pango_layout_set_font_description (layout, font_desc);
2247         pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
2248
2249         gtk_paint_layout (GTK_WIDGET (view)->style,
2250                           GTK_WIDGET (view)->window,
2251                           GTK_WIDGET_STATE (view),
2252                           FALSE,
2253                           page_area,
2254                           GTK_WIDGET (view),
2255                           NULL,
2256                           page_area->x + (target_width/2),
2257                           page_area->y + (page_area->height - logical_rect.height) / 2,
2258                           layout);
2259
2260         pango_font_description_free (font_desc);
2261         g_object_unref (layout);
2262 }
2263
2264 static void
2265 draw_one_page (EvView          *view,
2266                gint             page,
2267                GdkRectangle    *page_area,
2268                GtkBorder       *border,
2269                GdkRectangle    *expose_area,
2270                gboolean        *page_ready)
2271 {
2272         gint width, height;
2273         GdkPixbuf *current_pixbuf;
2274         GdkRectangle overlap;
2275         GdkRectangle real_page_area;
2276         EvViewSelection *selection;
2277         gint current_page;
2278
2279         g_assert (view->document);
2280
2281         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
2282                 return;
2283
2284         current_page = ev_page_cache_get_current_page (view->page_cache);
2285         selection = find_selection_for_page (view, page);
2286         ev_page_cache_get_size (view->page_cache,
2287                                 page, view->rotation,
2288                                 view->scale,
2289                                 &width, &height);
2290         /* Render the document itself */
2291         real_page_area = *page_area;
2292
2293         real_page_area.x += border->left;
2294         real_page_area.y += border->top;
2295         real_page_area.width -= (border->left + border->right);
2296         real_page_area.height -= (border->top + border->bottom);
2297         *page_ready = TRUE;
2298
2299         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
2300                                          GTK_WIDGET (view),
2301                                          page_area, border,
2302                                          page == current_page);
2303
2304         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
2305                 GdkPixbuf *selection_pixbuf = NULL;
2306                 GdkPixbuf *scaled_image;
2307                 GdkPixbuf *scaled_selection;
2308
2309                 current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
2310
2311                 /* Get the selection pixbuf iff we have something to draw */
2312                 if (current_pixbuf && view->selection_mode == EV_VIEW_SELECTION_TEXT && selection)
2313                         selection_pixbuf = ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
2314                                                                                  page,
2315                                                                                  view->scale,
2316                                                                                  NULL);
2317
2318                 if (current_pixbuf == NULL)
2319                         scaled_image = NULL;
2320                 else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
2321                          height == gdk_pixbuf_get_height (current_pixbuf))
2322                         scaled_image = g_object_ref (current_pixbuf);
2323                 else
2324                         /* FIXME: We don't want to scale the whole area, just the right
2325                          * area of it */
2326                         scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
2327                                                                 width, height,
2328                                                                 GDK_INTERP_NEAREST);
2329
2330                 if (selection_pixbuf == NULL)
2331                         scaled_selection = NULL;
2332                 else if (width == gdk_pixbuf_get_width (selection_pixbuf) &&
2333                          height == gdk_pixbuf_get_height (selection_pixbuf))
2334                         scaled_selection = g_object_ref (selection_pixbuf);
2335                 else
2336                         /* FIXME: We don't want to scale the whole area, just the right
2337                          * area of it */
2338                         scaled_selection = gdk_pixbuf_scale_simple (selection_pixbuf,
2339                                                                     width, height,
2340                                                                     GDK_INTERP_NEAREST);
2341
2342                 if (scaled_image) {
2343                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
2344                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
2345                                          scaled_image,
2346                                          overlap.x - real_page_area.x,
2347                                          overlap.y - real_page_area.y,
2348                                          overlap.x, overlap.y,
2349                                          overlap.width, overlap.height,
2350                                          GDK_RGB_DITHER_NORMAL,
2351                                          0, 0);
2352                         g_object_unref (scaled_image);
2353                 } else {
2354                         draw_loading_text (view,
2355                                            &real_page_area,
2356                                            expose_area);
2357                         *page_ready = FALSE;
2358                 }
2359
2360                 if (scaled_selection) {
2361                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
2362                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
2363                                          scaled_selection,
2364                                          overlap.x - real_page_area.x,
2365                                          overlap.y - real_page_area.y,
2366                                          overlap.x, overlap.y,
2367                                          overlap.width, overlap.height,
2368                                          GDK_RGB_DITHER_NORMAL,
2369                                          0, 0);
2370                         g_object_unref (scaled_selection);
2371                 }
2372         }
2373 }
2374
2375 /*** GObject functions ***/
2376
2377 static void
2378 ev_view_finalize (GObject *object)
2379 {
2380         EvView *view = EV_VIEW (object);
2381
2382         LOG ("Finalize");
2383
2384         g_free (view->status);
2385         g_free (view->find_status);
2386
2387         clear_selection (view);
2388
2389         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
2390 }
2391
2392 static void
2393 ev_view_destroy (GtkObject *object)
2394 {
2395         EvView *view = EV_VIEW (object);
2396
2397         if (view->document) {
2398                 g_object_unref (view->document);
2399                 view->document = NULL;
2400         }
2401
2402         if (view->pixbuf_cache) {
2403                 g_object_unref (view->pixbuf_cache);
2404                 view->pixbuf_cache = NULL;
2405         }
2406
2407         if (view->link_tooltip) {
2408                 gtk_widget_destroy (view->link_tooltip);
2409                 view->link_tooltip = NULL;
2410         }
2411
2412         if (view->selection_scroll_id) {
2413             g_source_remove (view->selection_scroll_id);
2414             view->selection_scroll_id = 0;
2415         }
2416
2417         if (view->selection_update_id) {
2418             g_source_remove (view->selection_update_id);
2419             view->selection_update_id = 0;
2420         }
2421
2422         ev_view_set_scroll_adjustments (view, NULL, NULL);
2423
2424         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
2425 }
2426
2427 static void
2428 ev_view_set_property (GObject      *object,
2429                       guint         prop_id,
2430                       const GValue *value,
2431                       GParamSpec   *pspec)
2432 {
2433         EvView *view = EV_VIEW (object);
2434
2435         switch (prop_id) {
2436                 case PROP_CONTINUOUS:
2437                         ev_view_set_continuous (view, g_value_get_boolean (value));
2438                         break;
2439                 case PROP_DUAL_PAGE:
2440                         ev_view_set_dual_page (view, g_value_get_boolean (value));
2441                         break;
2442                 case PROP_FULLSCREEN:
2443                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
2444                         break;
2445                 case PROP_PRESENTATION:
2446                         ev_view_set_presentation (view, g_value_get_boolean (value));
2447                         break;
2448                 case PROP_SIZING_MODE:
2449                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
2450                         break;
2451                 case PROP_ZOOM:
2452                         ev_view_set_zoom (view, g_value_get_double (value), FALSE);
2453                         break;
2454                 case PROP_ROTATION:
2455                         ev_view_set_rotation (view, g_value_get_int (value));
2456                         break;
2457                 default:
2458                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2459         }
2460 }
2461
2462 static AtkObject *
2463 ev_view_get_accessible (GtkWidget *widget)
2464 {
2465         static gboolean first_time = TRUE;
2466
2467         if (first_time) {
2468                 AtkObjectFactory *factory;
2469                 AtkRegistry *registry;
2470                 GType derived_type;
2471                 GType derived_atk_type;
2472
2473                 /*
2474                  * Figure out whether accessibility is enabled by looking at the
2475                  * type of the accessible object which would be created for
2476                  * the parent type of EvView.
2477                  */
2478                 derived_type = g_type_parent (EV_TYPE_VIEW);
2479
2480                 registry = atk_get_default_registry ();
2481                 factory = atk_registry_get_factory (registry,
2482                                                     derived_type);
2483                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
2484                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
2485                         atk_registry_set_factory_type (registry,
2486                                                        EV_TYPE_VIEW,
2487                                                        ev_view_accessible_factory_get_type ());
2488                 first_time = FALSE;
2489         }
2490         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
2491 }
2492
2493 static void
2494 ev_view_get_property (GObject *object,
2495                       guint prop_id,
2496                       GValue *value,
2497                       GParamSpec *pspec)
2498 {
2499         EvView *view = EV_VIEW (object);
2500
2501         switch (prop_id) {
2502                 case PROP_STATUS:
2503                         g_value_set_string (value, view->status);
2504                         break;
2505                 case PROP_FIND_STATUS:
2506                         g_value_set_string (value, view->status);
2507                         break;
2508                 case PROP_CONTINUOUS:
2509                         g_value_set_boolean (value, view->continuous);
2510                         break;
2511                 case PROP_DUAL_PAGE:
2512                         g_value_set_boolean (value, view->dual_page);
2513                         break;
2514                 case PROP_FULLSCREEN:
2515                         g_value_set_boolean (value, view->fullscreen);
2516                         break;
2517                 case PROP_PRESENTATION:
2518                         g_value_set_boolean (value, view->presentation);
2519                         break;
2520                 case PROP_SIZING_MODE:
2521                         g_value_set_enum (value, view->sizing_mode);
2522                         break;
2523                 case PROP_ZOOM:
2524                         g_value_set_double (value, view->scale);
2525                         break;
2526                 case PROP_ROTATION:
2527                         g_value_set_int (value, view->rotation);
2528                         break;
2529                 case PROP_HAS_SELECTION:
2530                         g_value_set_boolean (value,
2531                                              view->selection_info.selections != NULL);
2532                         break;
2533                 default:
2534                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2535         }
2536 }
2537
2538 static void
2539 ev_view_class_init (EvViewClass *class)
2540 {
2541         GObjectClass *object_class = G_OBJECT_CLASS (class);
2542         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
2543         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
2544         GtkBindingSet *binding_set;
2545
2546         object_class->finalize = ev_view_finalize;
2547         object_class->set_property = ev_view_set_property;
2548         object_class->get_property = ev_view_get_property;
2549
2550         widget_class->expose_event = ev_view_expose_event;
2551         widget_class->button_press_event = ev_view_button_press_event;
2552         widget_class->motion_notify_event = ev_view_motion_notify_event;
2553         widget_class->button_release_event = ev_view_button_release_event;
2554         widget_class->focus_in_event = ev_view_focus_in;
2555         widget_class->focus_out_event = ev_view_focus_out;
2556         widget_class->get_accessible = ev_view_get_accessible;
2557         widget_class->size_request = ev_view_size_request;
2558         widget_class->size_allocate = ev_view_size_allocate;
2559         widget_class->realize = ev_view_realize;
2560         widget_class->scroll_event = ev_view_scroll_event;
2561         widget_class->enter_notify_event = ev_view_enter_notify_event;
2562         widget_class->leave_notify_event = ev_view_leave_notify_event;
2563         widget_class->style_set = ev_view_style_set;
2564         widget_class->drag_data_get = ev_view_drag_data_get;
2565         widget_class->popup_menu = ev_view_popup_menu;
2566         gtk_object_class->destroy = ev_view_destroy;
2567
2568         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
2569         class->binding_activated = ev_view_scroll;
2570
2571         widget_class->set_scroll_adjustments_signal =
2572             g_signal_new ("set-scroll-adjustments",
2573                           G_OBJECT_CLASS_TYPE (object_class),
2574                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2575                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
2576                           NULL, NULL,
2577                           ev_marshal_VOID__OBJECT_OBJECT,
2578                           G_TYPE_NONE, 2,
2579                           GTK_TYPE_ADJUSTMENT,
2580                           GTK_TYPE_ADJUSTMENT);
2581
2582         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
2583                          G_TYPE_FROM_CLASS (object_class),
2584                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2585                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
2586                          NULL, NULL,
2587                          ev_marshal_VOID__ENUM_BOOLEAN,
2588                          G_TYPE_NONE, 2,
2589                          GTK_TYPE_SCROLL_TYPE,
2590                          G_TYPE_BOOLEAN);
2591
2592         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
2593                          G_TYPE_FROM_CLASS (object_class),
2594                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2595                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
2596                          NULL, NULL,
2597                          ev_marshal_VOID__VOID,
2598                          G_TYPE_NONE, 0, G_TYPE_NONE);
2599         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
2600                          G_TYPE_FROM_CLASS (object_class),
2601                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2602                          G_STRUCT_OFFSET (EvViewClass, external_link),
2603                          NULL, NULL,
2604                          g_cclosure_marshal_VOID__OBJECT,
2605                          G_TYPE_NONE, 1,
2606                          G_TYPE_OBJECT);
2607         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
2608                          G_TYPE_FROM_CLASS (object_class),
2609                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2610                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
2611                          NULL, NULL,
2612                          g_cclosure_marshal_VOID__OBJECT,
2613                          G_TYPE_NONE, 1,
2614                          G_TYPE_OBJECT);
2615
2616         g_object_class_install_property (object_class,
2617                                          PROP_STATUS,
2618                                          g_param_spec_string ("status",
2619                                                               "Status Message",
2620                                                               "The status message",
2621                                                               NULL,
2622                                                               G_PARAM_READABLE));
2623
2624         g_object_class_install_property (object_class,
2625                                          PROP_FIND_STATUS,
2626                                          g_param_spec_string ("find-status",
2627                                                               "Find Status Message",
2628                                                               "The find status message",
2629                                                               NULL,
2630                                                               G_PARAM_READABLE));
2631
2632         g_object_class_install_property (object_class,
2633                                          PROP_CONTINUOUS,
2634                                          g_param_spec_boolean ("continuous",
2635                                                                "Continuous",
2636                                                                "Continuous scrolling mode",
2637                                                                TRUE,
2638                                                                G_PARAM_READWRITE));
2639
2640         g_object_class_install_property (object_class,
2641                                          PROP_DUAL_PAGE,
2642                                          g_param_spec_boolean ("dual-page",
2643                                                                "Dual Page",
2644                                                                "Two pages visible at once",
2645                                                                FALSE,
2646                                                                G_PARAM_READWRITE));
2647         g_object_class_install_property (object_class,
2648                                          PROP_FULLSCREEN,
2649                                          g_param_spec_boolean ("fullscreen",
2650                                                                "Full Screen",
2651                                                                "Draw page in a fullscreen fashion",
2652                                                                FALSE,
2653                                                                G_PARAM_READWRITE));
2654         g_object_class_install_property (object_class,
2655                                          PROP_PRESENTATION,
2656                                          g_param_spec_boolean ("presentation",
2657                                                                "Presentation",
2658                                                                "Draw page in presentation mode",
2659                                                                TRUE,
2660                                                                G_PARAM_READWRITE));
2661
2662         g_object_class_install_property (object_class,
2663                                          PROP_SIZING_MODE,
2664                                          g_param_spec_enum ("sizing-mode",
2665                                                             "Sizing Mode",
2666                                                             "Sizing Mode",
2667                                                             EV_TYPE_SIZING_MODE,
2668                                                             EV_SIZING_FIT_WIDTH,
2669                                                             G_PARAM_READWRITE));
2670
2671         g_object_class_install_property (object_class,
2672                                          PROP_ZOOM,
2673                                          g_param_spec_double ("zoom",
2674                                                               "Zoom factor",
2675                                                                "Zoom factor",
2676                                                                MIN_SCALE,
2677                                                                MAX_SCALE,
2678                                                                1.0,
2679                                                                G_PARAM_READWRITE));
2680         g_object_class_install_property (object_class,
2681                                          PROP_ROTATION,
2682                                          g_param_spec_double ("rotation",
2683                                                               "Rotation",
2684                                                                "Rotation",
2685                                                                0,
2686                                                                360,
2687                                                                0,
2688                                                                G_PARAM_READWRITE));
2689         g_object_class_install_property (object_class,
2690                                          PROP_HAS_SELECTION,
2691                                          g_param_spec_boolean ("has-selection",
2692                                                                "Has selection",
2693                                                                "The view has selections",
2694                                                                FALSE,
2695                                                                G_PARAM_READABLE));
2696
2697         binding_set = gtk_binding_set_by_class (class);
2698
2699         add_scroll_binding_keypad (binding_set, GDK_Left,  0, EV_SCROLL_STEP_BACKWARD, TRUE);
2700         add_scroll_binding_keypad (binding_set, GDK_Right, 0, EV_SCROLL_STEP_FORWARD,  TRUE);
2701         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, EV_SCROLL_STEP_DOWN, TRUE);
2702         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, EV_SCROLL_STEP_UP,  TRUE);
2703         add_scroll_binding_keypad (binding_set, GDK_Up,    0, EV_SCROLL_STEP_BACKWARD, FALSE);
2704         add_scroll_binding_keypad (binding_set, GDK_Down,  0, EV_SCROLL_STEP_FORWARD,  FALSE);
2705         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, EV_SCROLL_STEP_DOWN, FALSE);
2706         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, EV_SCROLL_STEP_UP,  FALSE);
2707 }
2708
2709 static void
2710 ev_view_init (EvView *view)
2711 {
2712         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
2713
2714         view->spacing = 5;
2715         view->scale = 1.0;
2716         view->current_page = 0;
2717         view->pressed_button = -1;
2718         view->cursor = EV_VIEW_CURSOR_NORMAL;
2719         view->drag_info.in_drag = FALSE;
2720         view->selection_info.selections = NULL;
2721         view->selection_info.in_selection = FALSE;
2722         view->selection_info.in_drag = FALSE;
2723         view->selection_mode = EV_VIEW_SELECTION_TEXT;
2724         view->continuous = TRUE;
2725         view->dual_page = FALSE;
2726         view->presentation = FALSE;
2727         view->fullscreen = FALSE;
2728         view->sizing_mode = EV_SIZING_FIT_WIDTH;
2729         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2730         view->jump_to_find_result = TRUE;
2731 }
2732
2733 /*** Callbacks ***/
2734
2735 static void
2736 find_changed_cb (EvDocument *document, int page, EvView *view)
2737 {
2738         double percent;
2739         int n_pages;
2740
2741         percent = ev_document_find_get_progress
2742                         (EV_DOCUMENT_FIND (view->document));
2743         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2744
2745         if (view->jump_to_find_result == TRUE) {
2746                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
2747                 jump_to_find_result (view);
2748         }
2749         update_find_status_message (view, percent * n_pages >= n_pages - 1 );
2750         if (view->current_page == page)
2751                 gtk_widget_queue_draw (GTK_WIDGET (view));
2752 }
2753
2754 static void
2755 job_finished_cb (EvPixbufCache *pixbuf_cache,
2756                  EvView        *view)
2757 {
2758         gtk_widget_queue_draw (GTK_WIDGET (view));
2759 }
2760
2761 static void
2762 page_changed_cb (EvPageCache *page_cache,
2763                  int          new_page,
2764                  EvView      *view)
2765 {
2766         if (view->current_page != new_page) {
2767                 view->current_page = new_page;
2768                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
2769                 gtk_widget_queue_resize (GTK_WIDGET (view));
2770         } else {
2771                 gtk_widget_queue_draw (GTK_WIDGET (view));
2772         }
2773
2774         if (EV_IS_DOCUMENT_FIND (view->document)) {
2775                 view->find_result = 0;
2776                 update_find_status_message (view, TRUE);
2777         }
2778 }
2779
2780 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
2781                                          EvView *view)
2782 {
2783         int dx = 0, dy = 0;
2784
2785         if (! GTK_WIDGET_REALIZED (view))
2786                 return;
2787
2788         if (view->hadjustment) {
2789                 dx = view->scroll_x - (int) view->hadjustment->value;
2790                 view->scroll_x = (int) view->hadjustment->value;
2791         } else {
2792                 view->scroll_x = 0;
2793         }
2794
2795         if (view->vadjustment) {
2796                 dy = view->scroll_y - (int) view->vadjustment->value;
2797                 view->scroll_y = (int) view->vadjustment->value;
2798         } else {
2799                 view->scroll_y = 0;
2800         }
2801
2802
2803         if (view->pending_resize)
2804                 gtk_widget_queue_draw (GTK_WIDGET (view));
2805         else
2806                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
2807
2808
2809         if (view->document)
2810                 view_update_range_and_current_page (view);
2811 }
2812
2813 GtkWidget*
2814 ev_view_new (void)
2815 {
2816         GtkWidget *view;
2817
2818         view = g_object_new (EV_TYPE_VIEW, NULL);
2819
2820         return view;
2821 }
2822
2823 static void
2824 setup_caches (EvView *view)
2825 {
2826         view->page_cache = ev_page_cache_get (view->document);
2827         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
2828         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
2829         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
2830 }
2831
2832 static void
2833 clear_caches (EvView *view)
2834 {
2835         if (view->pixbuf_cache) {
2836                 g_object_unref (view->pixbuf_cache);
2837                 view->pixbuf_cache = NULL;
2838         }
2839
2840         if (view->page_cache) {
2841                 view->page_cache = NULL;
2842         }
2843 }
2844
2845 void
2846 ev_view_set_loading (EvView       *view,
2847                      gboolean      loading)
2848 {
2849         view->loading = loading;
2850         gtk_widget_queue_draw (GTK_WIDGET (view));
2851 }
2852
2853 void
2854 ev_view_set_document (EvView     *view,
2855                       EvDocument *document)
2856 {
2857         g_return_if_fail (EV_IS_VIEW (view));
2858
2859         view->loading = FALSE;
2860
2861         if (document != view->document) {
2862                 clear_caches (view);
2863
2864                 if (view->document) {
2865                         g_signal_handlers_disconnect_by_func (view->document,
2866                                                               find_changed_cb,
2867                                                               view);
2868                         g_object_unref (view->document);
2869                         view->page_cache = NULL;
2870
2871                 }
2872
2873                 view->document = document;
2874                 view->find_result = 0;
2875
2876                 if (view->document) {
2877                         g_object_ref (view->document);
2878                         if (EV_IS_DOCUMENT_FIND (view->document)) {
2879                                 g_signal_connect (view->document,
2880                                                   "find_changed",
2881                                                   G_CALLBACK (find_changed_cb),
2882                                                   view);
2883                         }
2884
2885                         setup_caches (view);
2886                 }
2887
2888                 gtk_widget_queue_resize (GTK_WIDGET (view));
2889         }
2890 }
2891
2892 /*** Zoom and sizing mode ***/
2893
2894 #define EPSILON 0.0000001
2895 void
2896 ev_view_set_zoom (EvView   *view,
2897                   double    factor,
2898                   gboolean  relative)
2899 {
2900         double scale;
2901
2902         if (relative)
2903                 scale = view->scale * factor;
2904         else
2905                 scale = factor;
2906
2907         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
2908
2909         if (ABS (view->scale - scale) < EPSILON)
2910                 return;
2911
2912         view->scale = scale;
2913         view->pending_resize = TRUE;
2914
2915         gtk_widget_queue_resize (GTK_WIDGET (view));
2916
2917         g_object_notify (G_OBJECT (view), "zoom");
2918 }
2919
2920 double
2921 ev_view_get_zoom (EvView *view)
2922 {
2923         return view->scale;
2924 }
2925
2926 gboolean
2927 ev_view_get_continuous (EvView *view)
2928 {
2929         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2930
2931         return view->continuous;
2932 }
2933
2934 void
2935 ev_view_set_continuous (EvView   *view,
2936                         gboolean  continuous)
2937 {
2938         g_return_if_fail (EV_IS_VIEW (view));
2939
2940         continuous = continuous != FALSE;
2941
2942         if (view->continuous != continuous) {
2943                 view->continuous = continuous;
2944                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
2945                 gtk_widget_queue_resize (GTK_WIDGET (view));
2946         }
2947
2948         g_object_notify (G_OBJECT (view), "continuous");
2949 }
2950
2951 gboolean
2952 ev_view_get_dual_page (EvView *view)
2953 {
2954         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2955
2956         return view->dual_page;
2957 }
2958
2959 void
2960 ev_view_set_dual_page (EvView   *view,
2961                        gboolean  dual_page)
2962 {
2963         g_return_if_fail (EV_IS_VIEW (view));
2964
2965         dual_page = dual_page != FALSE;
2966
2967         if (view->dual_page == dual_page)
2968                 return;
2969
2970         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
2971         view->dual_page = dual_page;
2972         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2973          * preload_cache_size to be 2 if dual_page is set.
2974          */
2975         gtk_widget_queue_resize (GTK_WIDGET (view));
2976
2977         g_object_notify (G_OBJECT (view), "dual-page");
2978 }
2979
2980 void
2981 ev_view_set_fullscreen (EvView   *view,
2982                          gboolean  fullscreen)
2983 {
2984         g_return_if_fail (EV_IS_VIEW (view));
2985
2986         fullscreen = fullscreen != FALSE;
2987
2988         if (view->fullscreen == fullscreen)
2989                 return;
2990
2991         view->fullscreen = fullscreen;
2992         gtk_widget_queue_resize (GTK_WIDGET (view));
2993
2994         g_object_notify (G_OBJECT (view), "fullscreen");
2995 }
2996
2997 gboolean
2998 ev_view_get_fullscreen (EvView *view)
2999 {
3000         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3001
3002         return view->fullscreen;
3003 }
3004
3005 void
3006 ev_view_set_presentation (EvView   *view,
3007                           gboolean  presentation)
3008 {
3009         g_return_if_fail (EV_IS_VIEW (view));
3010
3011         presentation = presentation != FALSE;
3012
3013         if (view->presentation == presentation)
3014                 return;
3015
3016         view->presentation = presentation;
3017         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
3018         gtk_widget_queue_resize (GTK_WIDGET (view));
3019
3020         if (GTK_WIDGET_REALIZED (view)) {
3021                 if (view->presentation)
3022                         gdk_window_set_background (GTK_WIDGET(view)->window,
3023                                                    &GTK_WIDGET (view)->style->black);
3024                 else
3025                         gdk_window_set_background (GTK_WIDGET(view)->window,
3026                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
3027         }
3028
3029
3030         g_object_notify (G_OBJECT (view), "presentation");
3031 }
3032
3033 gboolean
3034 ev_view_get_presentation (EvView *view)
3035 {
3036         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3037
3038         return view->presentation;
3039 }
3040
3041 void
3042 ev_view_set_sizing_mode (EvView       *view,
3043                          EvSizingMode  sizing_mode)
3044 {
3045         g_return_if_fail (EV_IS_VIEW (view));
3046
3047         if (view->sizing_mode == sizing_mode)
3048                 return;
3049
3050         view->sizing_mode = sizing_mode;
3051         gtk_widget_queue_resize (GTK_WIDGET (view));
3052
3053         g_object_notify (G_OBJECT (view), "sizing-mode");
3054 }
3055
3056 EvSizingMode
3057 ev_view_get_sizing_mode (EvView *view)
3058 {
3059         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
3060
3061         return view->sizing_mode;
3062 }
3063
3064 gboolean
3065 ev_view_can_zoom_in (EvView *view)
3066 {
3067         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
3068 }
3069
3070 gboolean
3071 ev_view_can_zoom_out (EvView *view)
3072 {
3073         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
3074 }
3075
3076 void
3077 ev_view_zoom_in (EvView *view)
3078 {
3079         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
3080
3081         view->pending_scroll = SCROLL_TO_CENTER;
3082         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
3083 }
3084
3085 void
3086 ev_view_zoom_out (EvView *view)
3087 {
3088         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
3089
3090         view->pending_scroll = SCROLL_TO_CENTER;
3091         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
3092 }
3093
3094 void
3095 ev_view_rotate_right (EvView *view)
3096 {
3097         int rotation = view->rotation + 90;
3098
3099         if (rotation >= 360) {
3100                 rotation -= 360;
3101         }
3102
3103         ev_view_set_rotation (view, rotation);
3104 }
3105
3106 void
3107 ev_view_rotate_left (EvView *view)
3108 {
3109         int rotation = view->rotation - 90;
3110
3111         if (rotation < 0) {
3112                 rotation += 360;
3113         }
3114
3115         ev_view_set_rotation (view, rotation);
3116 }
3117
3118 void
3119 ev_view_set_rotation (EvView *view, int rotation)
3120 {
3121         view->rotation = rotation;
3122
3123         if (view->pixbuf_cache) {
3124                 ev_pixbuf_cache_clear (view->pixbuf_cache);
3125                 gtk_widget_queue_resize (GTK_WIDGET (view));
3126         }
3127
3128         if (rotation != 0)
3129                 clear_selection (view);
3130
3131         g_object_notify (G_OBJECT (view), "rotation");
3132 }
3133
3134 int
3135 ev_view_get_rotation (EvView *view)
3136 {
3137         return view->rotation;
3138 }
3139
3140 static double
3141 zoom_for_size_fit_width (int doc_width,
3142                          int doc_height,
3143                          int target_width,
3144                          int target_height,
3145                          int vsb_width)
3146 {
3147         double scale;
3148
3149         scale = (double)target_width / doc_width;
3150
3151         if (doc_height * scale > target_height)
3152                 scale = (double) (target_width - vsb_width) / doc_width;
3153
3154         return scale;
3155 }
3156
3157 static double
3158 zoom_for_size_fit_height (int doc_width,
3159                           int doc_height,
3160                           int target_width,
3161                           int target_height,
3162                           int vsb_height)
3163 {
3164         double scale;
3165
3166         scale = (double)target_height / doc_height;
3167
3168         if (doc_width * scale > target_width)
3169                 scale = (double) (target_height - vsb_height) / doc_height;
3170
3171         return scale;
3172 }
3173
3174 static double
3175 zoom_for_size_best_fit (int doc_width,
3176                         int doc_height,
3177                         int target_width,
3178                         int target_height,
3179                         int vsb_width,
3180                         int hsb_width)
3181 {
3182         double w_scale;
3183         double h_scale;
3184
3185         w_scale = (double)target_width / doc_width;
3186         h_scale = (double)target_height / doc_height;
3187
3188         if (doc_height * w_scale > target_height)
3189                 w_scale = (double) (target_width - vsb_width) / doc_width;
3190         if (doc_width * h_scale > target_width)
3191                 h_scale = (double) (target_height - hsb_width) / doc_height;
3192
3193         return MIN (w_scale, h_scale);
3194 }
3195
3196
3197 static void
3198 ev_view_zoom_for_size_presentation (EvView *view,
3199                                     int     width,
3200                                     int     height)
3201 {
3202         int doc_width, doc_height;
3203         gdouble scale;
3204
3205         ev_page_cache_get_size (view->page_cache,
3206                                 view->current_page,
3207                                 view->rotation,
3208                                 1.0,
3209                                 &doc_width,
3210                                 &doc_height);
3211         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
3212         ev_view_set_zoom (view, scale, FALSE);
3213 }
3214
3215 static void
3216 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
3217                            int     width,
3218                            int     height,
3219                            int     vsb_width,
3220                            int     hsb_height)
3221 {
3222         int doc_width, doc_height;
3223         GtkBorder border;
3224         gdouble scale;
3225
3226         ev_page_cache_get_max_width (view->page_cache,
3227                                      view->rotation,
3228                                      1.0,
3229                                      &doc_width);
3230         ev_page_cache_get_max_height (view->page_cache,
3231                                       view->rotation,
3232                                       1.0,
3233                                       &doc_height);
3234         compute_border (view, doc_width, doc_height, &border);
3235
3236         doc_width = doc_width * 2;
3237         width -= (2 * (border.left + border.right) + 3 * view->spacing);
3238         height -= (border.top + border.bottom + 2 * view->spacing - 1);
3239
3240         /* FIXME: We really need to calculate the overall height here, not the
3241          * page height.  We assume there's always a vertical scrollbar for
3242          * now.  We need to fix this. */
3243         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3244                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
3245         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3246                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
3247         else
3248                 g_assert_not_reached ();
3249
3250         ev_view_set_zoom (view, scale, FALSE);
3251 }
3252
3253 static void
3254 ev_view_zoom_for_size_continuous (EvView *view,
3255                                   int     width,
3256                                   int     height,
3257                                   int     vsb_width,
3258                                   int     hsb_height)
3259 {
3260         int doc_width, doc_height;
3261         GtkBorder border;
3262         gdouble scale;
3263
3264         ev_page_cache_get_max_width (view->page_cache,
3265                                      view->rotation,
3266                                      1.0,
3267                                      &doc_width);
3268         ev_page_cache_get_max_height (view->page_cache,
3269                                       view->rotation,
3270                                       1.0,
3271                                       &doc_height);
3272         compute_border (view, doc_width, doc_height, &border);
3273
3274         width -= (border.left + border.right + 2 * view->spacing);
3275         height -= (border.top + border.bottom + 2 * view->spacing - 1);
3276
3277         /* FIXME: We really need to calculate the overall height here, not the
3278          * page height.  We assume there's always a vertical scrollbar for
3279          * now.  We need to fix this. */
3280         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3281                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
3282         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3283                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
3284         else
3285                 g_assert_not_reached ();
3286
3287         ev_view_set_zoom (view, scale, FALSE);
3288 }
3289
3290 static void
3291 ev_view_zoom_for_size_dual_page (EvView *view,
3292                                  int     width,
3293                                  int     height,
3294                                  int     vsb_width,
3295                                  int     hsb_height)
3296 {
3297         GtkBorder border;
3298         gint doc_width, doc_height;
3299         gdouble scale;
3300         gint other_page;
3301
3302         other_page = view->current_page ^ 1;
3303
3304         /* Find the largest of the two. */
3305         ev_page_cache_get_size (view->page_cache,
3306                                 view->current_page,
3307                                 view->rotation,
3308                                 1.0,
3309                                 &doc_width, &doc_height);
3310
3311         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
3312                 gint width_2, height_2;
3313                 ev_page_cache_get_size (view->page_cache,
3314                                         other_page,
3315                                         view->rotation,
3316                                         1.0,
3317                                         &width_2, &height_2);
3318                 if (width_2 > doc_width)
3319                         doc_width = width_2;
3320                 if (height_2 > doc_height)
3321                         doc_height = height_2;
3322         }
3323         compute_border (view, doc_width, doc_height, &border);
3324
3325         doc_width = doc_width * 2;
3326         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
3327         height -= (border.top + border.bottom + 2 * view->spacing);
3328
3329         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3330                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
3331         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3332                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
3333         else
3334                 g_assert_not_reached ();
3335
3336         ev_view_set_zoom (view, scale, FALSE);
3337 }
3338
3339 static void
3340 ev_view_zoom_for_size_single_page (EvView *view,
3341                                    int     width,
3342                                    int     height,
3343                                    int     vsb_width,
3344                                    int     hsb_height)
3345 {
3346         int doc_width, doc_height;
3347         GtkBorder border;
3348         gdouble scale;
3349
3350         ev_page_cache_get_size (view->page_cache,
3351                                 view->current_page,
3352                                 view->rotation,
3353                                 1.0,
3354                                 &doc_width,
3355                                 &doc_height);
3356         /* Get an approximate border */
3357         compute_border (view, width, height, &border);
3358
3359         width -= (border.left + border.right + 2 * view->spacing);
3360         height -= (border.top + border.bottom + 2 * view->spacing);
3361
3362         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3363                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
3364         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3365                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
3366         else
3367                 g_assert_not_reached ();
3368
3369         ev_view_set_zoom (view, scale, FALSE);
3370 }
3371
3372 void
3373 ev_view_set_zoom_for_size (EvView *view,
3374                            int     width,
3375                            int     height,
3376                            int     vsb_width,
3377                            int     hsb_height)
3378 {
3379         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3380                           view->sizing_mode == EV_SIZING_BEST_FIT);
3381         g_return_if_fail (width >= 0);
3382         g_return_if_fail (height >= 0);
3383
3384         if (view->document == NULL)
3385                 return;
3386
3387         if (view->presentation)
3388                 ev_view_zoom_for_size_presentation (view, width, height);
3389         else if (view->continuous && view->dual_page)
3390                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
3391         else if (view->continuous)
3392                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
3393         else if (view->dual_page)
3394                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
3395         else
3396                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
3397 }
3398
3399 /*** Status text messages ***/
3400
3401 const char *
3402 ev_view_get_status (EvView *view)
3403 {
3404         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
3405
3406         return view->status;
3407 }
3408
3409 static void
3410 ev_view_set_status (EvView *view, const char *message)
3411 {
3412         g_return_if_fail (EV_IS_VIEW (view));
3413
3414         if (message != view->status) {
3415                 g_free (view->status);
3416                 view->status = g_strdup (message);
3417                 g_object_notify (G_OBJECT (view), "status");
3418         }
3419 }
3420
3421 static void
3422 update_find_status_message (EvView *view, gboolean this_page)
3423 {
3424         char *message;
3425
3426         if (this_page) {
3427                 int results;
3428
3429                 results = ev_document_find_get_n_results
3430                                 (EV_DOCUMENT_FIND (view->document),
3431                                  view->current_page);
3432                 /* TRANS: Sometimes this could be better translated as
3433                    "%d hit(s) on this page".  Therefore this string
3434                    contains plural cases. */
3435                 message = g_strdup_printf (ngettext ("%d found on this page",
3436                                                      "%d found on this page",
3437                                                      results),
3438                                            results);
3439         } else {
3440                 double percent;
3441
3442                 percent = ev_document_find_get_progress
3443                                 (EV_DOCUMENT_FIND (view->document));
3444                 message = g_strdup_printf (_("%3d%% remaining to search"),
3445                                            (int) ((1.0 - percent) * 100));
3446
3447         }
3448         ev_view_set_find_status (view, message);
3449         g_free (message);
3450 }
3451
3452 const char *
3453 ev_view_get_find_status (EvView *view)
3454 {
3455         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
3456
3457         return view->find_status;
3458 }
3459
3460 static void
3461 ev_view_set_find_status (EvView *view, const char *message)
3462 {
3463         g_return_if_fail (EV_IS_VIEW (view));
3464
3465         g_free (view->find_status);
3466         view->find_status = g_strdup (message);
3467         g_object_notify (G_OBJECT (view), "find-status");
3468 }
3469
3470 /*** Find ***/
3471
3472 static void
3473 jump_to_find_result (EvView *view)
3474 {
3475         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3476         EvRectangle rect;
3477         GdkRectangle view_rect;
3478         int n_results;
3479         int page = view->current_page;
3480
3481         n_results = ev_document_find_get_n_results (find, page);
3482
3483         if (n_results > 0  && view->find_result < n_results) {
3484                 ev_document_find_get_result
3485                         (find, page, view->find_result, &rect);
3486
3487                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
3488                 ensure_rectangle_is_visible (view, &view_rect);
3489         }
3490 }
3491
3492 /**
3493  * jump_to_find_page
3494  * @view: #EvView instance
3495  * @direction: Direction to look
3496  * @shift: Shift from current page
3497  *
3498  * Jumps to the first page that has occurences of searched word.
3499  * Uses a direction where to look and a shift from current page.
3500  *
3501  */
3502 static void
3503 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
3504 {
3505         int n_pages, i;
3506
3507         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3508
3509         for (i = 0; i < n_pages; i++) {
3510                 int has_results;
3511                 int page;
3512
3513                 if (direction == EV_VIEW_FIND_NEXT)
3514                         page = view->current_page + i;
3515                 else
3516                         page = view->current_page - i;
3517                 page += shift;
3518
3519                 if (page >= n_pages) {
3520                         page = page - n_pages;
3521                 }
3522                 if (page < 0)
3523                         page = page + n_pages;
3524
3525                 has_results = ev_document_find_page_has_results
3526                                 (EV_DOCUMENT_FIND (view->document), page);
3527                 if (has_results == -1) {
3528                         break;
3529                 } else if (has_results == 1) {
3530                         ev_page_cache_set_current_page (view->page_cache, page);
3531                         break;
3532                 }
3533         }
3534 }
3535
3536 gboolean
3537 ev_view_can_find_next (EvView *view)
3538 {
3539         if (EV_IS_DOCUMENT_FIND (view->document)) {
3540                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3541                 int i, n_pages;
3542
3543                 n_pages = ev_page_cache_get_n_pages (view->page_cache);
3544                 for (i = 0; i < n_pages; i++) {
3545                         if (ev_document_find_get_n_results (find, i) > 0) {
3546                                 return TRUE;
3547                         }
3548                 }
3549         }
3550
3551         return FALSE;
3552 }
3553
3554 void
3555 ev_view_find_next (EvView *view)
3556 {
3557         int n_results, n_pages;
3558         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3559
3560         n_results = ev_document_find_get_n_results (find, view->current_page);
3561
3562         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3563
3564         view->find_result++;
3565
3566         if (view->find_result >= n_results) {
3567
3568                 view->find_result = 0;
3569                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
3570                 jump_to_find_result (view);
3571         } else {
3572                 jump_to_find_result (view);
3573                 gtk_widget_queue_draw (GTK_WIDGET (view));
3574         }
3575 }
3576
3577 gboolean
3578 ev_view_can_find_previous (EvView *view)
3579 {
3580         if (EV_IS_DOCUMENT_FIND (view->document)) {
3581                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3582                 int i, n_pages;
3583
3584                 n_pages = ev_page_cache_get_n_pages (view->page_cache);
3585                 for (i = n_pages - 1; i >= 0; i--) {
3586                         if (ev_document_find_get_n_results (find, i) > 0) {
3587                                 return TRUE;
3588                         }
3589                 }
3590         }
3591
3592         return FALSE;
3593 }
3594 void
3595 ev_view_find_previous (EvView *view)
3596 {
3597         int n_results, n_pages;
3598         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3599         EvPageCache *page_cache;
3600
3601         page_cache = ev_page_cache_get (view->document);
3602
3603         n_results = ev_document_find_get_n_results (find, view->current_page);
3604
3605         n_pages = ev_page_cache_get_n_pages (page_cache);
3606
3607         view->find_result--;
3608
3609         if (view->find_result < 0) {
3610
3611                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
3612                 view->find_result = ev_document_find_get_n_results (find, view->current_page) - 1;
3613                 jump_to_find_result (view);
3614         } else {
3615                 jump_to_find_result (view);
3616                 gtk_widget_queue_draw (GTK_WIDGET (view));
3617         }
3618 }
3619
3620 void ev_view_search_changed (EvView *view)
3621 {
3622         /* search string has changed, focus on new search result */
3623         view->jump_to_find_result = TRUE;
3624 }
3625
3626 /*** Selections ***/
3627
3628 /* compute_new_selection_rect/text calculates the area currently selected by
3629  * view_rect.  each handles a different mode;
3630  */
3631 static GList *
3632 compute_new_selection_rect (EvView       *view,
3633                             GdkPoint     *start,
3634                             GdkPoint     *stop)
3635 {
3636         GdkRectangle view_rect;
3637         int n_pages, i;
3638         GList *list = NULL;
3639
3640         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
3641
3642         view_rect.x = MIN (start->x, stop->x);
3643         view_rect.y = MIN (start->y, stop->y);
3644         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
3645         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
3646
3647         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3648
3649         for (i = 0; i < n_pages; i++) {
3650                 GdkRectangle page_area;
3651                 GtkBorder border;
3652
3653                 if (get_page_extents (view, i, &page_area, &border)) {
3654                         GdkRectangle overlap;
3655
3656                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
3657                                 EvViewSelection *selection;
3658
3659                                 selection = g_new0 (EvViewSelection, 1);
3660                                 selection->page = i;
3661                                 view_rect_to_doc_rect (view, &overlap, &page_area,
3662                                                        &(selection->rect));
3663
3664                                 list = g_list_append (list, selection);
3665                         }
3666                 }
3667         }
3668
3669         return list;
3670 }
3671
3672 static gboolean
3673 gdk_rectangle_point_in (GdkRectangle *rectangle,
3674                         GdkPoint     *point)
3675 {
3676         return rectangle->x <= point->x &&
3677                 rectangle->y <= point->y &&
3678                 point->x < rectangle->x + rectangle->width &&
3679                 point->y < rectangle->y + rectangle->height;
3680 }
3681
3682 static GList *
3683 compute_new_selection_text (EvView   *view,
3684                             GdkPoint *start,
3685                             GdkPoint *stop)
3686 {
3687         int n_pages, i, first, last;
3688         GList *list = NULL;
3689         EvViewSelection *selection;
3690         gint width, height;
3691         int start_page, end_page;
3692
3693         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
3694
3695         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3696
3697         /* First figure out the range of pages the selection
3698          * affects. */
3699         first = n_pages;
3700         last = 0;
3701         if (view->continuous) {
3702                 start_page = 0;
3703                 end_page = n_pages;
3704         } else if (view->dual_page) {
3705                 start_page = view->start_page;
3706                 end_page = view->end_page + 1;
3707         } else {
3708                 start_page = view->current_page;
3709                 end_page = view->current_page + 1;
3710         }
3711
3712         for (i = start_page; i < end_page; i++) {
3713                 GdkRectangle page_area;
3714                 GtkBorder border;
3715
3716                 get_page_extents (view, i, &page_area, &border);
3717                 if (gdk_rectangle_point_in (&page_area, start) ||
3718                     gdk_rectangle_point_in (&page_area, stop)) {
3719                         if (first == n_pages)
3720                                 first = i;
3721                         last = i;
3722                 }
3723
3724         }
3725
3726
3727
3728         /* Now create a list of EvViewSelection's for the affected
3729          * pages.  This could be an empty list, a list of just one
3730          * page or a number of pages.*/
3731         for (i = first; i < last + 1; i++) {
3732                 GdkRectangle page_area;
3733                 GtkBorder border;
3734                 GdkPoint *point;
3735
3736                 ev_page_cache_get_size (view->page_cache, i,
3737                                         view->rotation,
3738                                         1.0, &width, &height);
3739
3740                 selection = g_new0 (EvViewSelection, 1);
3741                 selection->page = i;
3742                 selection->rect.x1 = selection->rect.y1 = 0;
3743                 selection->rect.x2 = width;
3744                 selection->rect.y2 = height;
3745
3746                 get_page_extents (view, i, &page_area, &border);
3747
3748                 if (gdk_rectangle_point_in (&page_area, start))
3749                         point = start;
3750                 else
3751                         point = stop;
3752
3753                 if (i == first)
3754                         view_point_to_doc_point (view, point, &page_area,
3755                                                  &selection->rect.x1,
3756                                                  &selection->rect.y1);
3757
3758                 /* If the selection is contained within just one page,
3759                  * make sure we don't write 'start' into both points
3760                  * in selection->rect. */
3761                 if (first == last)
3762                         point = stop;
3763
3764                 if (i == last)
3765                         view_point_to_doc_point (view, point, &page_area,
3766                                                  &selection->rect.x2,
3767                                                  &selection->rect.y2);
3768
3769                 list = g_list_append (list, selection);
3770         }
3771
3772         return list;
3773 }
3774
3775 /* This function takes the newly calculated list, and figures out which regions
3776  * have changed.  It then queues a redraw approporiately.
3777  */
3778 static void
3779 merge_selection_region (EvView *view,
3780                         GList  *new_list)
3781 {
3782         GList *old_list;
3783         GList *new_list_ptr, *old_list_ptr;
3784
3785         /* Update the selection */
3786         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
3787         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
3788         view->selection_info.selections = new_list;
3789         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
3790         g_object_notify (G_OBJECT (view), "has-selection");
3791
3792         new_list_ptr = new_list;
3793         old_list_ptr = old_list;
3794
3795         while (new_list_ptr || old_list_ptr) {
3796                 EvViewSelection *old_sel, *new_sel;
3797                 int cur_page;
3798                 GdkRegion *region = NULL;
3799
3800                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
3801                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
3802
3803                 /* Assume that the lists are in order, and we run through them
3804                  * comparing them, one page at a time.  We come out with the
3805                  * first page we see. */
3806                 if (new_sel && old_sel) {
3807                         if (new_sel->page < old_sel->page) {
3808                                 new_list_ptr = new_list_ptr->next;
3809                                 old_sel = NULL;
3810                         } else if (new_sel->page > old_sel->page) {
3811                                 old_list_ptr = old_list_ptr->next;
3812                                 new_sel = NULL;
3813                         } else {
3814                                 new_list_ptr = new_list_ptr->next;
3815                                 old_list_ptr = old_list_ptr->next;
3816                         }
3817                 } else if (new_sel) {
3818                         new_list_ptr = new_list_ptr->next;
3819                 } else if (old_sel) {
3820                         old_list_ptr = old_list_ptr->next;
3821                 }
3822
3823                 g_assert (new_sel || old_sel);
3824
3825                 /* is the page we're looking at on the screen?*/
3826                 cur_page = new_sel ? new_sel->page : old_sel->page;
3827                 if (cur_page < view->start_page || cur_page > view->end_page)
3828                         continue;
3829
3830                 /* seed the cache with a new page.  We are going to need the new
3831                  * region too. */
3832                 if (new_sel) {
3833                         GdkRegion *tmp_region = NULL;
3834                         ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
3835                                                               cur_page,
3836                                                               view->scale,
3837                                                               &tmp_region);
3838                         if (tmp_region) {
3839                                 new_sel->covered_region = gdk_region_copy (tmp_region);
3840                         }
3841                 }
3842
3843                 /* Now we figure out what needs redrawing */
3844                 if (old_sel && new_sel) {
3845                         if (old_sel->covered_region &&
3846                             new_sel->covered_region) {
3847                                 /* We only want to redraw the areas that have
3848                                  * changed, so we xor the old and new regions
3849                                  * and redraw if it's different */
3850                                 region = gdk_region_copy (old_sel->covered_region);
3851                                 gdk_region_xor (region, new_sel->covered_region);
3852                                 if (gdk_region_empty (region)) {
3853                                         gdk_region_destroy (region);
3854                                         region = NULL;
3855                                 }
3856                         } else if (old_sel->covered_region) {
3857                                 region = gdk_region_copy (old_sel->covered_region);
3858                         } else if (new_sel->covered_region) {
3859                                 region = gdk_region_copy (new_sel->covered_region);
3860                         }
3861                 } else if (old_sel && !new_sel) {
3862                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
3863                                 region = gdk_region_copy (old_sel->covered_region);
3864                         }
3865                 } else if (!old_sel && new_sel) {
3866                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
3867                                 region = gdk_region_copy (new_sel->covered_region);
3868                         }
3869                 } else {
3870                         g_assert_not_reached ();
3871                 }
3872
3873                 /* Redraw the damaged region! */
3874                 if (region) {
3875                         GdkRectangle page_area;
3876                         GtkBorder border;
3877
3878                         get_page_extents (view, cur_page, &page_area, &border);
3879                         gdk_region_offset (region,
3880                                            page_area.x + border.left - view->scroll_x,
3881                                            page_area.y + border.top - view->scroll_y);
3882                         gdk_window_invalidate_region (GTK_WIDGET (view)->window, region, TRUE);
3883                         gdk_region_destroy (region);
3884                 }
3885         }
3886
3887         /* Free the old list, now that we're done with it. */
3888         g_list_foreach (old_list, (GFunc) selection_free, NULL);
3889 }
3890
3891 static void
3892 compute_selections (EvView   *view,
3893                     GdkPoint *start,
3894                     GdkPoint *stop)
3895 {
3896         GList *list;
3897
3898         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
3899                 list = compute_new_selection_rect (view, start, stop);
3900         else
3901                 list = compute_new_selection_text (view, start, stop);
3902         merge_selection_region (view, list);
3903 }
3904
3905 /* Free's the selection.  It's up to the caller to queue redraws if needed.
3906  */
3907 static void
3908 selection_free (EvViewSelection *selection)
3909 {
3910         if (selection->covered_region)
3911                 gdk_region_destroy (selection->covered_region);
3912         g_free (selection);
3913 }
3914
3915 static void
3916 clear_selection (EvView *view)
3917 {
3918         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
3919         view->selection_info.selections = NULL;
3920         view->selection_info.in_selection = FALSE;
3921         g_object_notify (G_OBJECT (view), "has-selection");
3922 }
3923
3924
3925 void
3926 ev_view_select_all (EvView *view)
3927 {
3928         int n_pages, i;
3929
3930         /* Disable selection on rotated pages for the 0.4.0 series */
3931         if (view->rotation != 0)
3932                 return;
3933
3934         clear_selection (view);
3935
3936         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3937         for (i = 0; i < n_pages; i++) {
3938                 int width, height;
3939                 EvViewSelection *selection;
3940
3941                 ev_page_cache_get_size (view->page_cache,
3942                                         i,
3943                                         view->rotation,
3944                                         1.0, &width, &height);
3945
3946                 selection = g_new0 (EvViewSelection, 1);
3947                 selection->page = i;
3948                 selection->rect.x1 = selection->rect.y1 = 0;
3949                 selection->rect.x2 = width;
3950                 selection->rect.y2 = height;
3951
3952                 view->selection_info.selections = g_list_append (view->selection_info.selections, selection);
3953         }
3954
3955         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, view->selection_info.selections);
3956         g_object_notify (G_OBJECT (view), "has-selection");
3957         gtk_widget_queue_draw (GTK_WIDGET (view));
3958 }
3959
3960 gboolean
3961 ev_view_get_has_selection (EvView *view)
3962 {
3963         return view->selection_info.selections != NULL;
3964 }
3965
3966 static char *
3967 get_selected_text (EvView *ev_view)
3968 {
3969         GString *text;
3970         GList *l;
3971
3972         text = g_string_new (NULL);
3973
3974         ev_document_doc_mutex_lock ();
3975
3976         for (l = ev_view->selection_info.selections; l != NULL; l = l->next) {
3977                 EvViewSelection *selection = (EvViewSelection *)l->data;
3978                 char *tmp;
3979
3980                 tmp = ev_document_get_text (ev_view->document,
3981                                             selection->page,
3982                                             &selection->rect);
3983                 g_string_append (text, tmp);
3984                 g_free (tmp);
3985         }
3986
3987         ev_document_doc_mutex_unlock ();
3988
3989         return g_string_free (text, FALSE);
3990 }
3991
3992 void
3993 ev_view_copy (EvView *ev_view)
3994 {
3995         GtkClipboard *clipboard;
3996         char *text;
3997
3998         if (!ev_document_can_get_text (ev_view->document)) {
3999                 return;
4000         }
4001
4002         text = get_selected_text (ev_view);
4003         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
4004                                               GDK_SELECTION_CLIPBOARD);
4005         gtk_clipboard_set_text (clipboard, text, -1);
4006         g_free (text);
4007 }
4008
4009 static void
4010 ev_view_primary_get_cb (GtkClipboard     *clipboard,
4011                         GtkSelectionData *selection_data,
4012                         guint             info,
4013                         gpointer          data)
4014 {
4015         EvView *ev_view = EV_VIEW (data);
4016         char *text;
4017
4018         if (!ev_document_can_get_text (ev_view->document)) {
4019                 return;
4020         }
4021
4022         text = get_selected_text (ev_view);
4023         gtk_selection_data_set_text (selection_data, text, -1);
4024         g_free (text);
4025 }
4026
4027 static void
4028 ev_view_primary_clear_cb (GtkClipboard *clipboard,
4029                           gpointer      data)
4030 {
4031         EvView *view = EV_VIEW (data);
4032
4033         clear_selection (view);
4034 }
4035
4036 static void
4037 ev_view_update_primary_selection (EvView *ev_view)
4038 {
4039         GtkClipboard *clipboard;
4040
4041         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
4042                                               GDK_SELECTION_PRIMARY);
4043
4044         if (ev_view->selection_info.selections) {
4045                 if (!gtk_clipboard_set_with_owner (clipboard,
4046                                                    targets,
4047                                                    G_N_ELEMENTS (targets),
4048                                                    ev_view_primary_get_cb,
4049                                                    ev_view_primary_clear_cb,
4050                                                    G_OBJECT (ev_view)))
4051                         ev_view_primary_clear_cb (clipboard, ev_view);
4052         } else {
4053                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
4054                         gtk_clipboard_clear (clipboard);
4055         }
4056 }
4057
4058 /*** Cursor operations ***/
4059
4060 static GdkCursor *
4061 ev_view_create_invisible_cursor(void)
4062 {
4063        GdkBitmap *empty;
4064        GdkColor black = { 0, 0, 0, 0 };
4065        static char bits[] = { 0x00 };
4066
4067        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
4068
4069        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
4070 }
4071
4072 static void
4073 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
4074 {
4075         GdkCursor *cursor = NULL;
4076         GdkDisplay *display;
4077         GtkWidget *widget;
4078
4079         if (view->cursor == new_cursor) {
4080                 return;
4081         }
4082
4083         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
4084         display = gtk_widget_get_display (widget);
4085         view->cursor = new_cursor;
4086
4087         switch (new_cursor) {
4088                 case EV_VIEW_CURSOR_NORMAL:
4089                         gdk_window_set_cursor (widget->window, NULL);
4090                         break;
4091                 case EV_VIEW_CURSOR_IBEAM:
4092                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
4093                         break;
4094                 case EV_VIEW_CURSOR_LINK:
4095                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
4096                         break;
4097                 case EV_VIEW_CURSOR_WAIT:
4098                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
4099                         break;
4100                 case EV_VIEW_CURSOR_HIDDEN:
4101                         cursor = ev_view_create_invisible_cursor ();
4102                         break;
4103                 case EV_VIEW_CURSOR_DRAG:
4104                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
4105                         break;
4106         }
4107
4108         if (cursor) {
4109                 gdk_window_set_cursor (widget->window, cursor);
4110                 gdk_cursor_unref (cursor);
4111                 gdk_flush();
4112         }
4113 }
4114
4115 void
4116 ev_view_hide_cursor (EvView *view)
4117 {
4118        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
4119 }
4120
4121 void
4122 ev_view_show_cursor (EvView *view)
4123 {
4124        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4125 }
4126
4127 gboolean
4128 ev_view_next_page (EvView *view)
4129 {
4130         int page;
4131
4132         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4133
4134         if (!view->page_cache)
4135                 return FALSE;
4136
4137         page = ev_page_cache_get_current_page (view->page_cache);
4138
4139         if (view->dual_page && !view->presentation)
4140                 page = page + 2;
4141         else
4142                 page = page + 1;
4143
4144         if (page < ev_page_cache_get_n_pages (view->page_cache)) {
4145                 ev_page_cache_set_current_page (view->page_cache, page);
4146                 return TRUE;
4147         } else if (ev_view_get_dual_page (view) && page == ev_page_cache_get_n_pages (view->page_cache)) {
4148                 ev_page_cache_set_current_page (view->page_cache, page - 1);
4149                 return TRUE;
4150         } else {
4151                 return FALSE;
4152         }
4153 }
4154
4155 gboolean
4156 ev_view_previous_page (EvView *view)
4157 {
4158         int page;
4159
4160         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4161
4162         if (!view->page_cache)
4163                 return FALSE;
4164
4165         page = ev_page_cache_get_current_page (view->page_cache);
4166
4167         if (view->dual_page && !view->presentation)
4168                 page = page - 2;
4169         else
4170                 page = page - 1;
4171
4172         if (page >= 0) {
4173                 ev_page_cache_set_current_page (view->page_cache, page);
4174                 return TRUE;
4175         } else if (ev_view_get_dual_page (view) && page == -1) {
4176                 ev_page_cache_set_current_page (view->page_cache, 0);
4177                 return TRUE;
4178         } else {
4179                 return FALSE;
4180         }
4181 }
4182
4183 /*** Enum description for usage in signal ***/
4184
4185 GType
4186 ev_sizing_mode_get_type (void)
4187 {
4188   static GType etype = 0;
4189   if (etype == 0) {
4190     static const GEnumValue values[] = {
4191       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
4192       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
4193       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
4194       { 0, NULL, NULL }
4195     };
4196     etype = g_enum_register_static ("EvSizingMode", values);
4197   }
4198   return etype;
4199 }
4200
4201 GType
4202 ev_scroll_type_get_type (void)
4203 {
4204   static GType etype = 0;
4205   if (etype == 0) {
4206     static const GEnumValue values[] = {
4207       { EV_SCROLL_PAGE_FORWARD, "EV_SCROLL_PAGE_FORWARD", "scroll-page-forward" },
4208       { EV_SCROLL_PAGE_BACKWARD, "EV_SCROLL_PAGE_BACKWARD", "scroll-page-backward" },
4209       { EV_SCROLL_STEP_FORWARD, "EV_SCROLL_STEP_FORWARD", "scroll-step-forward" },
4210       { EV_SCROLL_STEP_FORWARD, "EV_SCROLL_STEP_FORWARD", "scroll-step-forward" },
4211       { EV_SCROLL_STEP_UP, "EV_SCROLL_STEP_UP", "scroll-step-up" },
4212       { EV_SCROLL_STEP_DOWN, "EV_SCROLL_STEP_DOWN", "scroll-step-down" },
4213       { 0, NULL, NULL }
4214     };
4215     etype = g_enum_register_static ("EvScrollType", values);
4216   }
4217   return etype;
4218 }