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 <gtk/gtkalignment.h>
  23 #include <glib/gi18n.h>
  24 #include <gtk/gtkbindings.h>
  25 #include <gtk/gtkselection.h>
  26 #include <gtk/gtkclipboard.h>
  27 #include <gdk/gdkkeysyms.h>
  28 #include <libgnomevfs/gnome-vfs-utils.h>
  29
  30 #include "ev-marshal.h"
  31 #include "ev-view.h"
  32 #include "ev-document-find.h"
  33 #include "ev-document-misc.h"
  34 #include "ev-debug.h"
  35 #include "ev-job-queue.h"
  36 #include "ev-page-cache.h"
  37 #include "ev-pixbuf-cache.h"
  38
  39 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  40 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  41 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  42
  43 enum {
  44         PROP_0,
  45         PROP_STATUS,
  46         PROP_FIND_STATUS,
  47         PROP_CONTINUOUS,
  48         PROP_DUAL_PAGE,
  49         PROP_FULLSCREEN,
  50         PROP_PRESENTATION,
  51         PROP_SIZING_MODE,
  52         PROP_ZOOM,
  53 };
  54
  55 enum {
  56         SIGNAL_SCROLL_VIEW,
  57         SIGNAL_ZOOM_INVALID,
  58         N_SIGNALS,
  59 };
  60
  61 enum {
  62         TARGET_STRING,
  63         TARGET_TEXT,
  64         TARGET_COMPOUND_TEXT,
  65         TARGET_UTF8_STRING,
  66         TARGET_TEXT_BUFFER_CONTENTS
  67 };
  68
  69 static const GtkTargetEntry targets[] = {
  70         { "STRING", 0, TARGET_STRING },
  71         { "TEXT",   0, TARGET_TEXT },
  72         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  73         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  74 };
  75
  76 static guint signals[N_SIGNALS];
  77
  78 typedef enum {
  79         EV_VIEW_CURSOR_NORMAL,
  80         EV_VIEW_CURSOR_LINK,
  81         EV_VIEW_CURSOR_WAIT,
  82         EV_VIEW_CURSOR_HIDDEN,
  83         EV_VIEW_CURSOR_DRAG
  84 } EvViewCursor;
  85
  86 #define ZOOM_IN_FACTOR  1.2
  87 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  88
  89 #define MIN_SCALE 0.05409
  90 #define MAX_SCALE 4.0
  91
  92 typedef struct {
  93         EvRectangle rect;
  94         int page;
  95 } EvViewSelection;
  96
  97 typedef struct {
  98         gboolean dragging;
  99         GdkPoint start;
 100         gdouble hadj;
 101         gdouble vadj;
 102 } DragInfo;
 103
 104 typedef enum {
 105         SCROLL_TO_KEEP_POSITION,
 106         SCROLL_TO_CURRENT_PAGE,
 107         SCROLL_TO_CENTER
 108 } PendingScroll;
 109
 110 struct _EvView {
 111         GtkWidget parent_instance;
 112
 113         EvDocument *document;
 114
 115         char *status;
 116         char *find_status;
 117
 118         gint scroll_x;
 119         gint scroll_y;
 120
 121         DragInfo drag_info;
 122         gboolean pressed_button;
 123         GdkPoint selection_start;
 124         GList *selections;
 125         EvViewCursor cursor;
 126
 127         GtkAdjustment *hadjustment;
 128         GtkAdjustment *vadjustment;
 129
 130         EvPageCache *page_cache;
 131         EvPixbufCache *pixbuf_cache;
 132
 133         gint start_page;
 134         gint end_page;
 135         gint current_page;
 136
 137         EvJobRender *current_job;
 138
 139         int find_page;
 140         int find_result;
 141         int spacing;
 142
 143         double scale;
 144
 145         gboolean continuous;
 146         gboolean dual_page;
 147         gboolean fullscreen;
 148         gboolean presentation;
 149         EvSizingMode sizing_mode;
 150
 151         PendingScroll pending_scroll;
 152         gboolean pending_resize;
 153 };
 154
 155 struct _EvViewClass {
 156         GtkWidgetClass parent_class;
 157
 158         void    (*set_scroll_adjustments) (EvView         *view,
 159                                            GtkAdjustment  *hadjustment,
 160                                            GtkAdjustment  *vadjustment);
 161         void    (*scroll_view)            (EvView         *view,
 162                                            GtkScrollType   scroll,
 163                                            gboolean        horizontal);
 164         void    (*zoom_invalid)           (EvView         *view);
 165 };
 166
 167 /*** Scrolling ***/
 168 static void       scroll_to_current_page                     (EvView *view,
 169                                                               GtkOrientation orientation);
 170 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 171                                                               GtkAdjustment      *hadjustment,
 172                                                               GtkAdjustment      *vadjustment);
 173 static void       view_update_range_and_current_page         (EvView             *view);
 174 static void       set_scroll_adjustment                      (EvView             *view,
 175                                                               GtkOrientation      orientation,
 176                                                               GtkAdjustment      *adjustment);
 177 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 178                                                               GtkAdjustment      *hadjustment,
 179                                                               GtkAdjustment      *vadjustment);
 180 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 181                                                               guint               keyval,
 182                                                               GtkScrollType       scroll,
 183                                                               gboolean            horizontal);
 184 static void       ev_view_scroll_view                        (EvView             *view,
 185                                                               GtkScrollType       scroll,
 186                                                               gboolean            horizontal);
 187 static void       ensure_rectangle_is_visible                (EvView             *view,
 188                                                               GdkRectangle       *rect);
 189
 190 /*** Geometry computations ***/
 191 static void       compute_border                             (EvView             *view,
 192                                                               int                 width,
 193                                                               int                 height,
 194                                                               GtkBorder          *border);
 195 static void       get_page_y_offset                          (EvView *view,
 196                                                               int page,
 197                                                               double zoom,
 198                                                               int *y_offset);
 199 static gboolean   get_page_extents                           (EvView             *view,
 200                                                               gint                page,
 201                                                               GdkRectangle       *page_area,
 202                                                               GtkBorder          *border);
 203 static void       view_rect_to_doc_rect                      (EvView             *view,
 204                                                               GdkRectangle       *view_rect,
 205                                                               GdkRectangle       *page_area,
 206                                                               EvRectangle        *doc_rect);
 207 static void       doc_rect_to_view_rect                      (EvView             *view,
 208                                                               int                 page,
 209                                                               EvRectangle        *doc_rect,
 210                                                               GdkRectangle       *view_rect);
 211 static void       find_page_at_location                      (EvView             *view,
 212                                                               gdouble             x,
 213                                                               gdouble             y,
 214                                                               gint               *page,
 215                                                               gint               *x_offset,
 216                                                               gint               *y_offset);
 217
 218 /*** Hyperrefs ***/
 219 static EvLink*    get_link_at_location                       (EvView             *view,
 220                                                               gdouble             x,
 221                                                               gdouble             y);
 222 static void       go_to_link                                 (EvView             *view,
 223                                                               EvLink             *link);
 224 static char*      status_message_from_link                   (EvView             *view,
 225                                                               EvLink             *link);
 226
 227 /*** GtkWidget implementation ***/
 228 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 229                                                               GtkRequisition     *requisition);
 230 static void       ev_view_size_request_continuous            (EvView             *view,
 231                                                               GtkRequisition     *requisition);
 232 static void       ev_view_size_request_dual_page             (EvView             *view,
 233                                                               GtkRequisition     *requisition);
 234 static void       ev_view_size_request_single_page           (EvView             *view,
 235                                                               GtkRequisition     *requisition);
 236 static void       ev_view_size_request                       (GtkWidget          *widget,
 237                                                               GtkRequisition     *requisition);
 238 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 239                                                               GtkAllocation      *allocation);
 240 static void       ev_view_realize                            (GtkWidget          *widget);
 241 static void       ev_view_unrealize                          (GtkWidget          *widget);
 242 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 243                                                               GdkEventScroll     *event);
 244 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 245                                                               GdkEventExpose     *event);
 246 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 247                                                               GdkEventButton     *event);
 248 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 249                                                               GdkEventMotion     *event);
 250 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 251                                                               GdkEventButton     *event);
 252
 253 /*** Drawing ***/
 254 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 255 static void       draw_rubberband                            (GtkWidget          *widget,
 256                                                               GdkWindow          *window,
 257                                                               const GdkRectangle *rect,
 258                                                               guchar              alpha);
 259 static void       highlight_find_results                     (EvView             *view,
 260                                                               int                 page);
 261 static void       draw_one_page                              (EvView             *view,
 262                                                               gint                page,
 263                                                               GdkRectangle       *page_area,
 264                                                               GtkBorder          *border,
 265                                                               GdkRectangle       *expose_area);
 266
 267 /*** Callbacks ***/
 268 static void       find_changed_cb                            (EvDocument         *document,
 269                                                               int                 page,
 270                                                               EvView             *view);
 271 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 272                                                               EvView             *view);
 273 static void       page_changed_cb                            (EvPageCache        *page_cache,
 274                                                               int                 new_page,
 275                                                               EvView             *view);
 276 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 277                                                               EvView             *view);
 278
 279 /*** GObject ***/
 280 static void       ev_view_finalize                           (GObject            *object);
 281 static void       ev_view_destroy                            (GtkObject          *object);
 282 static void       ev_view_set_property                       (GObject            *object,
 283                                                               guint               prop_id,
 284                                                               const GValue       *value,
 285                                                               GParamSpec         *pspec);
 286 static void       ev_view_get_property                       (GObject            *object,
 287                                                               guint               prop_id,
 288                                                               GValue             *value,
 289                                                               GParamSpec         *pspec);
 290 static void       ev_view_class_init                         (EvViewClass        *class);
 291 static void       ev_view_init                               (EvView             *view);
 292
 293 /*** Zoom and sizing ***/
 294 static double   zoom_for_size_fit_width                      (int doc_width,
 295                                                               int doc_height,
 296                                                               int target_width,
 297                                                               int target_height,
 298                                                               int vsb_width);
 299 static double   zoom_for_size_best_fit                       (int doc_width,
 300                                                               int doc_height,
 301                                                               int target_width,
 302                                                               int target_height,
 303                                                               int vsb_width,
 304                                                               int hsb_width);
 305 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 306                                                               int     width,
 307                                                               int     height);
 308 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 309                                                                 int     width,
 310                                                                 int     height,
 311                                                                 int     vsb_width,
 312                                                                 int     hsb_height);
 313 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 314                                                                 int     width,
 315                                                                 int     height,
 316                                                                 int     vsb_width,
 317                                                                 int     hsb_height);
 318 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 319                                                                 int     width,
 320                                                                 int     height,
 321                                                                 int     vsb_width,
 322                                                                 int     hsb_height);
 323 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 324                                                                 int     width,
 325                                                                 int     height,
 326                                                                 int     vsb_width,
 327                                                                 int     hsb_height);
 328 /*** Cursors ***/
 329 static GdkCursor* ev_view_create_invisible_cursor            (void);
 330 static void       ev_view_set_cursor                         (EvView             *view,
 331                                                               EvViewCursor        new_cursor);
 332
 333 /*** Status messages ***/
 334 static void       ev_view_set_status                         (EvView             *view,
 335                                                               const char         *message);
 336 static void       update_find_status_message                 (EvView             *view);
 337 static void       ev_view_set_find_status                    (EvView             *view,
 338                                                               const char         *message);
 339 /*** Find ***/
 340 static void       jump_to_find_result                        (EvView             *view);
 341 static void       jump_to_find_page                          (EvView             *view);
 342
 343 /*** Selection ***/
 344 static void       compute_selections                         (EvView             *view,
 345                                                               GdkRectangle       *view_rect);
 346 static void       clear_selection                            (EvView             *view);
 347 static char*      get_selected_text                          (EvView             *ev_view);
 348 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 349                                                               GtkSelectionData   *selection_data,
 350                                                               guint               info,
 351                                                               gpointer            data);
 352 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 353                                                               gpointer            data);
 354 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 355
 356
 357 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 358
 359 static void
 360 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 361 {
 362         GdkRectangle page_area;
 363         GtkBorder border;
 364
 365         get_page_extents (view, view->current_page, &page_area, &border);
 366
 367         if (orientation == GTK_ORIENTATION_VERTICAL) {
 368                 if (view->continuous) {
 369                         gtk_adjustment_clamp_page (view->vadjustment,
 370                                                    page_area.y - view->spacing,
 371                                                    page_area.y + view->vadjustment->page_size);
 372                 } else {
 373                         gtk_adjustment_set_value (view->vadjustment,
 374                                                   view->vadjustment->lower);
 375                 }
 376         } else {
 377                 if (view->dual_page) {
 378                         gtk_adjustment_clamp_page (view->hadjustment,
 379                                                    page_area.x,
 380                                                    page_area.x + view->hadjustment->page_size);
 381                 } else {
 382                         gtk_adjustment_set_value (view->hadjustment,
 383                                                   CLAMP (view->hadjustment->value,
 384                                                   view->hadjustment->lower,
 385                                                   view->hadjustment->upper -
 386                                                   view->hadjustment->page_size));
 387                 }
 388         }
 389 }
 390
 391 static void
 392 view_set_adjustment_values (EvView         *view,
 393                             GtkOrientation  orientation)
 394 {
 395         GtkWidget *widget = GTK_WIDGET (view);
 396         GtkAdjustment *adjustment;
 397         int requisition;
 398         int allocation;
 399
 400         double factor;
 401         gint new_value;
 402
 403         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 404                 requisition = widget->requisition.width;
 405                 allocation = widget->allocation.width;
 406                 adjustment = view->hadjustment;
 407         } else {
 408                 requisition = widget->requisition.height;
 409                 allocation = widget->allocation.height;
 410                 adjustment = view->vadjustment;
 411         }
 412
 413         if (!adjustment)
 414                 return;
 415
 416         factor = 1.0;
 417         switch (view->pending_scroll) {
 418                 case SCROLL_TO_KEEP_POSITION:
 419                         factor = (adjustment->value) / adjustment->upper;
 420                         break;
 421                 case SCROLL_TO_CURRENT_PAGE:
 422                         break;
 423                 case SCROLL_TO_CENTER:
 424                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 425                         break;
 426         }
 427
 428         adjustment->page_size = allocation;
 429         adjustment->step_increment = allocation * 0.1;
 430         adjustment->page_increment = allocation * 0.9;
 431         adjustment->lower = 0;
 432         adjustment->upper = MAX (allocation, requisition);
 433
 434         /*
 435          * We add 0.5 to the values before to average out our rounding errors.
 436          */
 437         switch (view->pending_scroll) {
 438                 case SCROLL_TO_KEEP_POSITION:
 439                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 440                         gtk_adjustment_set_value (adjustment, (int)new_value);
 441                         break;
 442                 case SCROLL_TO_CURRENT_PAGE:
 443                         scroll_to_current_page (view, orientation);
 444                         break;
 445                 case SCROLL_TO_CENTER:
 446                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 447                                            0, adjustment->upper - adjustment->page_size);
 448                         gtk_adjustment_set_value (adjustment, (int)new_value);
 449                         break;
 450         }
 451
 452         gtk_adjustment_changed (adjustment);
 453 }
 454
 455 static void
 456 view_update_range_and_current_page (EvView *view)
 457 {
 458         /* Presentation trumps all other modes */
 459         if (view->presentation) {
 460                 view->start_page = view->current_page;
 461                 view->end_page = view->current_page;
 462         } else if (view->continuous) {
 463                 GdkRectangle current_area, unused, page_area;
 464                 GtkBorder border;
 465                 gint current_page;
 466                 gboolean found = FALSE;
 467                 int i;
 468
 469                 if (!(view->vadjustment && view->hadjustment))
 470                         return;
 471
 472                 current_area.x = view->hadjustment->value;
 473                 current_area.width = view->hadjustment->upper;
 474                 current_area.y = view->vadjustment->value;
 475                 current_area.height = view->vadjustment->page_size;
 476
 477                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 478
 479                         get_page_extents (view, i, &page_area, &border);
 480
 481                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 482                                 if (! found) {
 483                                         view->start_page = i;
 484                                         found = TRUE;
 485
 486                                 }
 487                                 view->end_page = i;
 488                         } else if (found) {
 489                                 break;
 490                         }
 491                 }
 492
 493                 current_page = ev_page_cache_get_current_page (view->page_cache);
 494
 495                 if (current_page < view->start_page || current_page > view->end_page) {
 496                         view->current_page = view->start_page;
 497                         ev_page_cache_set_current_page (view->page_cache, view->start_page);
 498                 }
 499         } else {
 500                 if (view->dual_page) {
 501                         if (view->current_page % 2 == 0) {
 502                                 view->start_page = view->current_page;
 503                                 if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 504                                         view->end_page = view->start_page + 1;
 505                         } else {
 506                                 view->start_page = view->current_page - 1;
 507                                 view->end_page = view->current_page;
 508                         }
 509                 } else {
 510                         view->start_page = view->current_page;
 511                         view->end_page = view->current_page;
 512                 }
 513         }
 514
 515         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 516                                         view->start_page,
 517                                         view->end_page,
 518                                         view->scale);
 519 }
 520
 521 static void
 522 set_scroll_adjustment (EvView *view,
 523                        GtkOrientation  orientation,
 524                        GtkAdjustment  *adjustment)
 525 {
 526         GtkAdjustment **to_set;
 527
 528         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 529                 to_set = &view->hadjustment;
 530         else
 531                 to_set = &view->vadjustment;
 532
 533         if (*to_set != adjustment) {
 534                 if (*to_set) {
 535                         g_signal_handlers_disconnect_by_func (*to_set,
 536                                                               (gpointer) on_adjustment_value_changed,
 537                                                               view);
 538                         g_object_unref (*to_set);
 539                 }
 540
 541                 *to_set = adjustment;
 542                 view_set_adjustment_values (view, orientation);
 543
 544                 if (*to_set) {
 545                         g_object_ref (*to_set);
 546                         g_signal_connect (*to_set, "value_changed",
 547                                           G_CALLBACK (on_adjustment_value_changed), view);
 548                 }
 549         }
 550 }
 551
 552 static void
 553 ev_view_set_scroll_adjustments (EvView *view,
 554                                 GtkAdjustment  *hadjustment,
 555                                 GtkAdjustment  *vadjustment)
 556 {
 557         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 558         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 559
 560         on_adjustment_value_changed (NULL, view);
 561 }
 562
 563 static void
 564 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 565                            guint           keyval,
 566                            GtkScrollType   scroll,
 567                            gboolean        horizontal)
 568 {
 569   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 570
 571   gtk_binding_entry_add_signal (binding_set, keyval, 0,
 572                                 "scroll_view", 2,
 573                                 GTK_TYPE_SCROLL_TYPE, scroll,
 574                                 G_TYPE_BOOLEAN, horizontal);
 575   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
 576                                 "scroll_view", 2,
 577                                 GTK_TYPE_SCROLL_TYPE, scroll,
 578                                 G_TYPE_BOOLEAN, horizontal);
 579 }
 580
 581 void
 582 ev_view_scroll (EvView        *view,
 583                 EvScrollType   scroll)
 584 {
 585         GtkAdjustment *adjustment;
 586         double value, increment;
 587         gboolean first_page = FALSE;
 588         gboolean last_page = FALSE;
 589
 590         /* Assign values for increment and vertical adjustment */
 591         adjustment = view->vadjustment;
 592         increment = adjustment->page_size * 0.75;
 593         value = adjustment->value;
 594
 595         /* Assign boolean for first and last page */
 596         if (view->current_page == 0)
 597                 first_page = TRUE;
 598         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 599                 last_page = TRUE;
 600
 601         switch (scroll) {
 602                 case EV_SCROLL_PAGE_BACKWARD:
 603                         /* Do not jump backwards if at the first page */
 604                         if (value == (adjustment->lower) && first_page) {
 605                                 /* Do nothing */
 606                                 /* At the top of a page, assign the upper bound limit of previous page */
 607                         } else if (value == (adjustment->lower)) {
 608                                 value = adjustment->upper - adjustment->page_size;
 609                                 ev_page_cache_set_current_page (view->page_cache, view->current_page - 1);
 610                                 /* Jump to the top */
 611                         } else {
 612                                 value = MAX (value - increment, adjustment->lower);
 613                         }
 614                         break;
 615                 case EV_SCROLL_PAGE_FORWARD:
 616                         /* Do not jump forward if at the last page */
 617                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 618                                 /* Do nothing */
 619                         /* At the bottom of a page, assign the lower bound limit of next page */
 620                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 621                                 value = 0;
 622                                 ev_page_cache_set_current_page (view->page_cache, view->current_page + 1);
 623                         /* Jump to the bottom */
 624                         } else {
 625                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 626                         }
 627                         break;
 628                 default:
 629                         break;
 630         }
 631
 632         gtk_adjustment_set_value (adjustment, value);
 633 }
 634
 635 static void
 636 ev_view_scroll_view (EvView *view,
 637                      GtkScrollType scroll,
 638                      gboolean horizontal)
 639 {
 640         GtkAdjustment *adjustment;
 641         double value;
 642
 643         if (horizontal) {
 644                 adjustment = view->hadjustment;
 645         } else {
 646                 adjustment = view->vadjustment;
 647         }
 648
 649         value = adjustment->value;
 650
 651         switch (scroll) {
 652                 case GTK_SCROLL_STEP_BACKWARD:
 653                         value -= adjustment->step_increment;
 654                         break;
 655                 case GTK_SCROLL_STEP_FORWARD:
 656                         value += adjustment->step_increment;
 657                         break;
 658                 default:
 659                         break;
 660         }
 661
 662         value = CLAMP (value, adjustment->lower,
 663                        adjustment->upper - adjustment->page_size);
 664
 665         gtk_adjustment_set_value (adjustment, value);
 666 }
 667
 668 #define MARGIN 5
 669
 670 static void
 671 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 672 {
 673         GtkWidget *widget = GTK_WIDGET (view);
 674         GtkAdjustment *adjustment;
 675         int value;
 676
 677         adjustment = view->vadjustment;
 678
 679         if (rect->y < adjustment->value) {
 680                 value = MAX (adjustment->lower, rect->y - MARGIN);
 681                 gtk_adjustment_set_value (view->vadjustment, value);
 682         } else if (rect->y + rect->height >
 683                    adjustment->value + widget->allocation.height) {
 684                 value = MIN (adjustment->upper, rect->y + rect->height -
 685                              widget->allocation.height + MARGIN);
 686                 gtk_adjustment_set_value (view->vadjustment, value);
 687         }
 688
 689         adjustment = view->hadjustment;
 690
 691         if (rect->x < adjustment->value) {
 692                 value = MAX (adjustment->lower, rect->x - MARGIN);
 693                 gtk_adjustment_set_value (view->hadjustment, value);
 694         } else if (rect->x + rect->height >
 695                    adjustment->value + widget->allocation.width) {
 696                 value = MIN (adjustment->upper, rect->x + rect->width -
 697                              widget->allocation.width + MARGIN);
 698                 gtk_adjustment_set_value (view->hadjustment, value);
 699         }
 700 }
 701
 702 /*** Geometry computations ***/
 703
 704 static void
 705 compute_border (EvView *view, int width, int height, GtkBorder *border)
 706 {
 707         if (view->presentation) {
 708                 border->left = 0;
 709                 border->right = 0;
 710                 border->top = 0;
 711                 border->bottom = 0;
 712         } else {
 713                 ev_document_misc_get_page_border_size (width, height, border);
 714         }
 715 }
 716
 717 static void       get_page_y_offset                          (EvView *view,
 718                                                               int page,
 719                                                               double zoom,
 720                                                               int *y_offset)
 721 {
 722         int max_width, offset;
 723         GtkBorder border;
 724
 725         g_return_if_fail (y_offset != NULL);
 726
 727         ev_page_cache_get_max_width (view->page_cache, zoom, &max_width);
 728
 729         compute_border (view, max_width, max_width, &border);
 730
 731         if (view->dual_page) {
 732                 ev_page_cache_get_height_to_page (view->page_cache, page, zoom, NULL, &offset);
 733                 offset += (page / 2 + 1) * view->spacing + (page / 2) * (border.top + border.bottom);
 734         } else {
 735                 ev_page_cache_get_height_to_page (view->page_cache, page, zoom, &offset, NULL);
 736                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 737         }
 738
 739         *y_offset = offset;
 740         return;
 741 }
 742
 743 static gboolean
 744 get_page_extents (EvView       *view,
 745                   gint          page,
 746                   GdkRectangle *page_area,
 747                   GtkBorder    *border)
 748 {
 749         GtkWidget *widget;
 750         int width, height;
 751
 752         widget = GTK_WIDGET (view);
 753
 754         /* Get the size of the page */
 755         ev_page_cache_get_size (view->page_cache, page,
 756                                 view->scale,
 757                                 &width, &height);
 758         compute_border (view, width, height, border);
 759         page_area->width = width + border->left + border->right;
 760         page_area->height = height + border->top + border->bottom;
 761
 762         if (view->presentation) {
 763                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 764                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 765         } else if (view->continuous) {
 766                 gint max_width;
 767                 gint x, y;
 768
 769                 ev_page_cache_get_max_width (view->page_cache, view->scale, &max_width);
 770                 max_width = max_width + border->left + border->right;
 771                 /* Get the location of the bounding box */
 772                 if (view->dual_page) {
 773                         x = view->spacing + (page % 2) * (max_width + view->spacing);
 774                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 775                         if (page % 2 == 0)
 776                                 x = x + (max_width - width - border->left - border->right);
 777                 } else {
 778                         x = view->spacing;
 779                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 780                 }
 781
 782                 get_page_y_offset (view, page, view->scale, &y);
 783
 784                 page_area->x = x;
 785                 page_area->y = y;
 786         } else {
 787                 gint x, y;
 788                 if (view->dual_page) {
 789                         gint width_2, height_2;
 790                         gint max_width = width;
 791                         gint max_height = height;
 792                         GtkBorder overall_border;
 793                         gint other_page;
 794
 795                         other_page = page ^ 1;
 796
 797                         /* First, we get the bounding box of the two pages */
 798                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
 799                                 ev_page_cache_get_size (view->page_cache,
 800                                                         other_page,
 801                                                         view->scale,
 802                                                         &width_2, &height_2);
 803                                 if (width_2 > width)
 804                                         max_width = width_2;
 805                                 if (height_2 > height)
 806                                         max_height = height_2;
 807                         }
 808                         compute_border (view, max_width, max_height, &overall_border);
 809
 810                         /* Find the offsets */
 811                         x = view->spacing;
 812                         y = view->spacing;
 813
 814                         /* Adjust for being the left or right page */
 815                         if (page % 2 == 0)
 816                                 x = x + max_width - width;
 817                         else
 818                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 819
 820                         y = y + (max_height - height)/2;
 821
 822                         /* Adjust for extra allocation */
 823                         x = x + MAX (0, widget->allocation.width -
 824                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 825                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 826                 } else {
 827                         x = view->spacing;
 828                         y = view->spacing;
 829
 830                         /* Adjust for extra allocation */
 831                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 832                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 833                 }
 834
 835                 page_area->x = x;
 836                 page_area->y = y;
 837         }
 838
 839         return TRUE;
 840 }
 841
 842 static void
 843 view_rect_to_doc_rect (EvView *view,
 844                        GdkRectangle *view_rect,
 845                        GdkRectangle *page_area,
 846                        EvRectangle  *doc_rect)
 847 {
 848         doc_rect->x1 = floor ((view_rect->x - page_area->x) / view->scale);
 849         doc_rect->y1 = floor ((view_rect->y - page_area->y) / view->scale);
 850         doc_rect->x2 = doc_rect->x1 + ceil (view_rect->width / view->scale);
 851         doc_rect->y2 = doc_rect->y1 + ceil (view_rect->height / view->scale);
 852 }
 853
 854 static void
 855 doc_rect_to_view_rect (EvView       *view,
 856                        int           page,
 857                        EvRectangle  *doc_rect,
 858                        GdkRectangle *view_rect)
 859 {
 860         GdkRectangle page_area;
 861         GtkBorder border;
 862         int width, height;
 863
 864         get_page_extents (view, page, &page_area, &border);
 865
 866         width = doc_rect->x2 - doc_rect->x1;
 867         height = doc_rect->y2 - doc_rect->y1;
 868         view_rect->x = floor (doc_rect->x1 * view->scale) + page_area.x;
 869         view_rect->y = floor (doc_rect->y1 * view->scale) + page_area.y;
 870         view_rect->width = ceil (width * view->scale);
 871         view_rect->height = ceil (height * view->scale);
 872 }
 873
 874 static void
 875 find_page_at_location (EvView  *view,
 876                        gdouble  x,
 877                        gdouble  y,
 878                        gint    *page,
 879                        gint    *x_offset,
 880                        gint    *y_offset)
 881 {
 882         int i;
 883
 884         if (view->document == NULL)
 885                 return;
 886
 887         g_assert (page);
 888         g_assert (x_offset);
 889         g_assert (y_offset);
 890
 891         for (i = view->start_page; i <= view->end_page; i++) {
 892                 GdkRectangle page_area;
 893                 GtkBorder border;
 894
 895                 if (! get_page_extents (view, i, &page_area, &border))
 896                         continue;
 897
 898                 if ((x >= page_area.x + border.left) &&
 899                     (x < page_area.x + page_area.width - border.right) &&
 900                     (y >= page_area.y + border.top) &&
 901                     (y < page_area.y + page_area.height - border.bottom)) {
 902                         *page = i;
 903                         *x_offset = x - (page_area.x + border.left);
 904                         *y_offset = y - (page_area.y + border.top);
 905                         return;
 906                 }
 907         }
 908
 909         *page = -1;
 910 }
 911
 912 /*** Hyperref ***/
 913 static EvLink *
 914 get_link_at_location (EvView  *view,
 915                       gdouble  x,
 916                       gdouble  y)
 917 {
 918         gint page = -1;
 919         gint x_offset = 0, y_offset = 0;
 920         GList *link_mapping;
 921
 922         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
 923
 924         if (page == -1)
 925                 return NULL;
 926
 927         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
 928
 929         if (link_mapping)
 930                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
 931         else
 932                 return NULL;
 933 }
 934
 935 /* FIXME: standardize this sometime */
 936 static void
 937 go_to_link (EvView *view, EvLink *link)
 938 {
 939         EvLinkType type;
 940         const char *uri;
 941         int page;
 942
 943         type = ev_link_get_link_type (link);
 944
 945         switch (type) {
 946                 case EV_LINK_TYPE_TITLE:
 947                         break;
 948                 case EV_LINK_TYPE_PAGE:
 949                         page = ev_link_get_page (link);
 950                         ev_page_cache_set_current_page (view->page_cache, page);
 951                         break;
 952                 case EV_LINK_TYPE_EXTERNAL_URI:
 953                         uri = ev_link_get_uri (link);
 954                         gnome_vfs_url_show (uri);
 955                         break;
 956         }
 957 }
 958
 959 static char *
 960 status_message_from_link (EvView *view, EvLink *link)
 961 {
 962         EvLinkType type;
 963         char *msg = NULL;
 964         char *page_label;
 965
 966         type = ev_link_get_link_type (link);
 967
 968         switch (type) {
 969                 case EV_LINK_TYPE_TITLE:
 970                         if (ev_link_get_title (link))
 971                                 msg = g_strdup (ev_link_get_title (link));
 972                         break;
 973                 case EV_LINK_TYPE_PAGE:
 974                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
 975                         msg = g_strdup_printf (_("Go to page %s"), page_label);
 976                         g_free (page_label);
 977                         break;
 978                 case EV_LINK_TYPE_EXTERNAL_URI:
 979                         msg = g_strdup (ev_link_get_uri (link));
 980                         break;
 981                 default:
 982                         break;
 983         }
 984
 985         return msg;
 986 }
 987
 988
 989 /*** GtkWidget implementation ***/
 990
 991 static void
 992 ev_view_size_request_continuous_dual_page (EvView         *view,
 993                                            GtkRequisition *requisition)
 994 {
 995         int max_width;
 996         gint n_pages;
 997         GtkBorder border;
 998
 999         ev_page_cache_get_max_width (view->page_cache, view->scale, &max_width);
1000         compute_border (view, max_width, max_width, &border);
1001
1002         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
1003
1004         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
1005         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1006
1007         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1008                 requisition->width = 1;
1009         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1010                 requisition->width = 1;
1011                 /* FIXME: This could actually be set on one page docs or docs
1012                  * with a strange aspect ratio. */
1013                 /* requisition->height = 1;*/
1014         }
1015 }
1016
1017 static void
1018 ev_view_size_request_continuous (EvView         *view,
1019                                  GtkRequisition *requisition)
1020 {
1021         int max_width;
1022         int n_pages;
1023         GtkBorder border;
1024
1025
1026         ev_page_cache_get_max_width (view->page_cache, view->scale, &max_width);
1027         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1028         compute_border (view, max_width, max_width, &border);
1029
1030         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
1031         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1032
1033         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1034                 requisition->width = 1;
1035         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1036                 requisition->width = 1;
1037                 /* FIXME: This could actually be set on one page docs or docs
1038                  * with a strange aspect ratio. */
1039                 /* requisition->height = 1;*/
1040         }
1041 }
1042
1043 static void
1044 ev_view_size_request_dual_page (EvView         *view,
1045                                 GtkRequisition *requisition)
1046 {
1047         GtkBorder border;
1048         gint width, height;
1049
1050         /* Find the largest of the two. */
1051         ev_page_cache_get_size (view->page_cache,
1052                                 view->current_page,
1053                                 view->scale,
1054                                 &width, &height);
1055         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1056                 gint width_2, height_2;
1057                 ev_page_cache_get_size (view->page_cache,
1058                                         view->current_page + 1,
1059                                         view->scale,
1060                                         &width_2, &height_2);
1061                 if (width_2 > width) {
1062                         width = width_2;
1063                         height = height_2;
1064                 }
1065         }
1066         compute_border (view, width, height, &border);
1067
1068         requisition->width = ((width + border.left + border.right) * 2) +
1069                 (view->spacing * 3);
1070         requisition->height = (height + border.top + border.bottom) +
1071                 (view->spacing * 2);
1072
1073         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1074                 requisition->width = 1;
1075         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1076                 requisition->width = 1;
1077                 requisition->height = 1;
1078         }
1079 }
1080
1081 static void
1082 ev_view_size_request_single_page (EvView         *view,
1083                                   GtkRequisition *requisition)
1084 {
1085         GtkBorder border;
1086         gint width, height;
1087
1088         ev_page_cache_get_size (view->page_cache,
1089                                 view->current_page,
1090                                 view->scale,
1091                                 &width, &height);
1092         compute_border (view, width, height, &border);
1093
1094         requisition->width = width + border.left + border.right + (2 * view->spacing);
1095         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1096
1097         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1098                 requisition->width = 1;
1099                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1100         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1101                 requisition->width = 1;
1102                 requisition->height = 1;
1103         }
1104 }
1105
1106 static void
1107 ev_view_size_request (GtkWidget      *widget,
1108                       GtkRequisition *requisition)
1109 {
1110         EvView *view = EV_VIEW (widget);
1111
1112         if (view->document == NULL) {
1113                 requisition->width = 1;
1114                 requisition->height = 1;
1115                 return;
1116         }
1117
1118         if (view->presentation) {
1119                 requisition->width = 1;
1120                 requisition->height = 1;
1121                 return;
1122         }
1123
1124         if (view->continuous && view->dual_page)
1125                 ev_view_size_request_continuous_dual_page (view, requisition);
1126         else if (view->continuous)
1127                 ev_view_size_request_continuous (view, requisition);
1128         else if (view->dual_page)
1129                 ev_view_size_request_dual_page (view, requisition);
1130         else
1131                 ev_view_size_request_single_page (view, requisition);
1132 }
1133
1134 static void
1135 ev_view_size_allocate (GtkWidget      *widget,
1136                        GtkAllocation  *allocation)
1137 {
1138         EvView *view = EV_VIEW (widget);
1139
1140         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1141                   view->sizing_mode == EV_SIZING_BEST_FIT) {
1142
1143                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1144
1145                 ev_view_size_request (widget, &widget->requisition);
1146         }
1147
1148         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1149         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1150
1151         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1152         view->pending_resize = FALSE;
1153
1154         if (view->document)
1155                 view_update_range_and_current_page (view);
1156
1157         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1158 }
1159
1160 static void
1161 ev_view_realize (GtkWidget *widget)
1162 {
1163         EvView *view = EV_VIEW (widget);
1164         GdkWindowAttr attributes;
1165
1166         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1167
1168
1169         attributes.window_type = GDK_WINDOW_CHILD;
1170         attributes.wclass = GDK_INPUT_OUTPUT;
1171         attributes.visual = gtk_widget_get_visual (widget);
1172         attributes.colormap = gtk_widget_get_colormap (widget);
1173
1174         attributes.x = widget->allocation.x;
1175         attributes.y = widget->allocation.y;
1176         attributes.width = widget->allocation.width;
1177         attributes.height = widget->allocation.height;
1178         attributes.event_mask = GDK_EXPOSURE_MASK |
1179                                 GDK_BUTTON_PRESS_MASK |
1180                                 GDK_BUTTON_RELEASE_MASK |
1181                                 GDK_SCROLL_MASK |
1182                                 GDK_KEY_PRESS_MASK |
1183                                 GDK_POINTER_MOTION_MASK |
1184                                 GDK_LEAVE_NOTIFY_MASK;
1185
1186         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1187                                          &attributes,
1188                                          GDK_WA_X | GDK_WA_Y |
1189                                          GDK_WA_COLORMAP |
1190                                          GDK_WA_VISUAL);
1191         gdk_window_set_user_data (widget->window, widget);
1192         widget->style = gtk_style_attach (widget->style, widget->window);
1193
1194         if (view->presentation)
1195                 gdk_window_set_background (widget->window, &widget->style->black);
1196         else
1197                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1198 }
1199
1200 static void
1201 ev_view_unrealize (GtkWidget *widget)
1202 {
1203         GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
1204 }
1205
1206 static gboolean
1207 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1208 {
1209         EvView *view = EV_VIEW (widget);
1210
1211         if ((event->state & GDK_CONTROL_MASK) != 0) {
1212
1213                  ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1214
1215                  if (event->direction == GDK_SCROLL_UP ||
1216                         event->direction == GDK_SCROLL_LEFT) {
1217                             if (ev_view_can_zoom_in (view)) {
1218                                     ev_view_zoom_in (view);
1219                             }
1220                  } else {
1221                             if (ev_view_can_zoom_out (view)) {
1222                                     ev_view_zoom_out (view);
1223                             }
1224                  }
1225                  return TRUE;
1226         }
1227
1228         if ((event->state & GDK_SHIFT_MASK) != 0) {
1229                 if (event->direction == GDK_SCROLL_UP)
1230                         event->direction = GDK_SCROLL_LEFT;
1231                 if (event->direction == GDK_SCROLL_DOWN)
1232                         event->direction = GDK_SCROLL_RIGHT;
1233         }
1234
1235         return FALSE;
1236 }
1237
1238 static gboolean
1239 ev_view_expose_event (GtkWidget      *widget,
1240                       GdkEventExpose *event)
1241 {
1242         EvView *view = EV_VIEW (widget);
1243         GdkRectangle rubberband;
1244         GList *l;
1245         int i;
1246
1247         if (view->document == NULL)
1248                 return FALSE;
1249
1250         for (i = view->start_page; i <= view->end_page; i++) {
1251                 GdkRectangle page_area;
1252                 GtkBorder border;
1253
1254                 if (!get_page_extents (view, i, &page_area, &border))
1255                         continue;
1256
1257                 page_area.x -= view->scroll_x;
1258                 page_area.y -= view->scroll_y;
1259
1260                 draw_one_page (view, i, &page_area, &border, &(event->area));
1261
1262                 if (EV_IS_DOCUMENT_FIND (view->document)) {
1263                         highlight_find_results (view, i);
1264                 }
1265         }
1266
1267         for (l = view->selections; l != NULL; l = l->next) {
1268                 EvViewSelection *selection = (EvViewSelection *)l->data;
1269
1270                 doc_rect_to_view_rect (view, selection->page,
1271                                        &selection->rect, &rubberband);
1272                 if (rubberband.width > 0 && rubberband.height > 0) {
1273                         draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
1274                                          &rubberband, 0x40);
1275                 }
1276         }
1277
1278         return FALSE;
1279 }
1280
1281 static gboolean
1282 ev_view_button_press_event (GtkWidget      *widget,
1283                             GdkEventButton *event)
1284 {
1285         EvView *view = EV_VIEW (widget);
1286
1287         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1288                 gtk_widget_grab_focus (widget);
1289         }
1290
1291         view->pressed_button = event->button;
1292
1293         switch (event->button) {
1294                 case 1:
1295                         if (view->selections) {
1296                                 clear_selection (view);
1297                                 gtk_widget_queue_draw (widget);
1298                         }
1299
1300                         view->selection_start.x = event->x;
1301                         view->selection_start.y = event->y;
1302                         return TRUE;
1303                 case 2:
1304                         /* use root coordinates as reference point because
1305                          * scrolling changes window relative coordinates */
1306                         view->drag_info.start.x = event->x_root;
1307                         view->drag_info.start.y = event->y_root;
1308                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1309                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1310
1311                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1312
1313                         return TRUE;
1314         }
1315
1316         return FALSE;
1317 }
1318
1319 static gboolean
1320 ev_view_motion_notify_event (GtkWidget      *widget,
1321                              GdkEventMotion *event)
1322 {
1323         EvView *view = EV_VIEW (widget);
1324
1325         if (view->pressed_button == 1) {
1326                 GdkRectangle selection;
1327
1328                 selection.x = MIN (view->selection_start.x, event->x) + view->scroll_x;
1329                 selection.y = MIN (view->selection_start.y, event->y) + view->scroll_y;
1330                 selection.width = ABS (view->selection_start.x - event->x) + 1;
1331                 selection.height = ABS (view->selection_start.y - event->y) + 1;
1332
1333                 compute_selections (view, &selection);
1334
1335                 gtk_widget_queue_draw (widget);
1336
1337                 return TRUE;
1338         } else if (view->pressed_button == 2) {
1339                 if (!view->drag_info.dragging) {
1340                         gboolean start;
1341
1342                         start = gtk_drag_check_threshold (widget,
1343                                                           view->drag_info.start.x,
1344                                                           view->drag_info.start.y,
1345                                                           event->x_root,
1346                                                           event->y_root);
1347                         view->drag_info.dragging = start;
1348                 }
1349
1350                 if (view->drag_info.dragging) {
1351                         int dx, dy;
1352                         gdouble dhadj_value, dvadj_value;
1353
1354                         dx = event->x_root - view->drag_info.start.x;
1355                         dy = event->y_root - view->drag_info.start.y;
1356
1357                         dhadj_value = view->hadjustment->page_size *
1358                                       (gdouble)dx / widget->allocation.width;
1359                         dvadj_value = view->vadjustment->page_size *
1360                                       (gdouble)dy / widget->allocation.height;
1361
1362                         /* clamp scrolling to visible area */
1363                         gtk_adjustment_set_value (view->hadjustment,
1364                                                   MIN(view->drag_info.hadj - dhadj_value,
1365                                                       view->hadjustment->upper -
1366                                                       view->hadjustment->page_size));
1367                         gtk_adjustment_set_value (view->vadjustment,
1368                                                   MIN(view->drag_info.vadj - dvadj_value,
1369                                                       view->vadjustment->upper -
1370                                                       view->vadjustment->page_size));
1371
1372                         return TRUE;
1373                 }
1374         } else if (view->pressed_button <= 0 && view->document) {
1375                 EvLink *link;
1376
1377                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1378                 if (link) {
1379                         char *msg;
1380
1381                         msg = status_message_from_link (view, link);
1382                         ev_view_set_status (view, msg);
1383                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1384                         g_free (msg);
1385                 } else {
1386                         ev_view_set_status (view, NULL);
1387                         if (view->cursor == EV_VIEW_CURSOR_LINK) {
1388                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1389                         }
1390                 }
1391                 return TRUE;
1392         }
1393
1394         return FALSE;
1395 }
1396
1397 static gboolean
1398 ev_view_button_release_event (GtkWidget      *widget,
1399                               GdkEventButton *event)
1400 {
1401         EvView *view = EV_VIEW (widget);
1402
1403         if (view->pressed_button == 2) {
1404                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1405         }
1406
1407         view->pressed_button = -1;
1408         view->drag_info.dragging = FALSE;
1409
1410         if (view->selections) {
1411                 ev_view_update_primary_selection (view);
1412         } else if (view->document) {
1413                 EvLink *link;
1414
1415                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1416                 if (link) {
1417                         go_to_link (view, link);
1418                 }
1419         }
1420
1421         return FALSE;
1422 }
1423
1424 /*** Drawing ***/
1425
1426 static guint32
1427 ev_gdk_color_to_rgb (const GdkColor *color)
1428 {
1429   guint32 result;
1430   result = (0xff0000 | (color->red & 0xff00));
1431   result <<= 8;
1432   result |= ((color->green & 0xff00) | (color->blue >> 8));
1433   return result;
1434 }
1435
1436 static void
1437 draw_rubberband (GtkWidget *widget, GdkWindow *window,
1438                  const GdkRectangle *rect, guchar alpha)
1439 {
1440         GdkGC *gc;
1441         GdkPixbuf *pixbuf;
1442         GdkColor *fill_color_gdk;
1443         guint fill_color;
1444
1445         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
1446         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
1447
1448         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
1449                                  rect->width, rect->height);
1450         gdk_pixbuf_fill (pixbuf, fill_color);
1451
1452         gdk_draw_pixbuf (window, NULL, pixbuf,
1453                          0, 0,
1454                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1455                          rect->width, rect->height,
1456                          GDK_RGB_DITHER_NONE,
1457                          0, 0);
1458
1459         g_object_unref (pixbuf);
1460
1461         gc = gdk_gc_new (window);
1462         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
1463         gdk_draw_rectangle (window, gc, FALSE,
1464                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1465                             rect->width - 1,
1466                             rect->height - 1);
1467         g_object_unref (gc);
1468
1469         gdk_color_free (fill_color_gdk);
1470 }
1471
1472
1473 static void
1474 highlight_find_results (EvView *view, int page)
1475 {
1476         EvDocumentFind *find;
1477         int i, results = 0;
1478
1479         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
1480
1481         find = EV_DOCUMENT_FIND (view->document);
1482
1483         results = ev_document_find_get_n_results (find, page);
1484
1485         for (i = 0; i < results; i++) {
1486                 EvRectangle rectangle;
1487                 GdkRectangle view_rectangle;
1488                 guchar alpha;
1489
1490                 if (i == view->find_result && page == view->find_page) {
1491                         alpha = 0x90;
1492                 } else {
1493                         alpha = 0x20;
1494                 }
1495
1496                 ev_document_find_get_result (find, page,
1497                                              i, &rectangle);
1498                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
1499                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
1500                                  &view_rectangle, alpha);
1501         }
1502 }
1503
1504 static void
1505 draw_one_page (EvView       *view,
1506                gint          page,
1507                GdkRectangle *page_area,
1508                GtkBorder    *border,
1509                GdkRectangle *expose_area)
1510 {
1511         gint width, height;
1512         GdkPixbuf *scaled_image;
1513         GdkPixbuf *current_pixbuf;
1514         GdkRectangle overlap;
1515         GdkRectangle real_page_area;
1516
1517         g_assert (view->document);
1518         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
1519                 return;
1520
1521         ev_page_cache_get_size (view->page_cache,
1522                                 page, view->scale,
1523                                 &width, &height);
1524         /* Render the document itself */
1525         real_page_area = *page_area;
1526
1527         real_page_area.x += border->left;
1528         real_page_area.y += border->top;
1529         real_page_area.width -= (border->left + border->right);
1530         real_page_area.height -= (border->top + border->bottom);
1531
1532         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
1533                                          GTK_WIDGET (view),
1534                                          page_area, border);
1535
1536         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
1537                 current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
1538
1539                 if (current_pixbuf == NULL)
1540                         scaled_image = NULL;
1541                 else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
1542                          height == gdk_pixbuf_get_height (current_pixbuf))
1543                         scaled_image = g_object_ref (current_pixbuf);
1544                 else
1545                         /* FIXME: We don't want to scale the whole area, just the right
1546                          * area of it */
1547                         scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
1548                                                                 width, height,
1549                                                                 GDK_INTERP_NEAREST);
1550
1551                 if (scaled_image) {
1552                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
1553                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
1554                                          scaled_image,
1555                                          overlap.x - real_page_area.x,
1556                                          overlap.y - real_page_area.y,
1557                                          overlap.x, overlap.y,
1558                                          overlap.width, overlap.height,
1559                                          GDK_RGB_DITHER_NORMAL,
1560                                          0, 0);
1561                         g_object_unref (scaled_image);
1562                 }
1563         }
1564 }
1565
1566 /*** GObject functions ***/
1567
1568 static void
1569 ev_view_finalize (GObject *object)
1570 {
1571         EvView *view = EV_VIEW (object);
1572
1573         LOG ("Finalize");
1574
1575         g_free (view->status);
1576         g_free (view->find_status);
1577
1578         clear_selection (view);
1579
1580         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
1581 }
1582
1583 static void
1584 ev_view_destroy (GtkObject *object)
1585 {
1586         EvView *view = EV_VIEW (object);
1587
1588         if (view->document) {
1589                 g_object_unref (view->document);
1590                 view->document = NULL;
1591         }
1592         if (view->pixbuf_cache) {
1593                 g_object_unref (view->pixbuf_cache);
1594                 view->pixbuf_cache = NULL;
1595         }
1596         ev_view_set_scroll_adjustments (view, NULL, NULL);
1597
1598         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
1599 }
1600
1601 static void
1602 ev_view_set_property (GObject      *object,
1603                       guint         prop_id,
1604                       const GValue *value,
1605                       GParamSpec   *pspec)
1606 {
1607         EvView *view = EV_VIEW (object);
1608
1609         switch (prop_id)
1610         {
1611         case PROP_CONTINUOUS:
1612                 ev_view_set_continuous (view, g_value_get_boolean (value));
1613                 break;
1614         case PROP_DUAL_PAGE:
1615                 ev_view_set_dual_page (view, g_value_get_boolean (value));
1616                 break;
1617         case PROP_FULLSCREEN:
1618                 ev_view_set_fullscreen (view, g_value_get_boolean (value));
1619                 break;
1620         case PROP_PRESENTATION:
1621                 ev_view_set_presentation (view, g_value_get_boolean (value));
1622                 break;
1623         case PROP_SIZING_MODE:
1624                 ev_view_set_sizing_mode (view, g_value_get_enum (value));
1625                 break;
1626         case PROP_ZOOM:
1627                 ev_view_set_zoom (view, g_value_get_double (value), FALSE);
1628                 break;
1629         default:
1630                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1631         }
1632 }
1633
1634 static void
1635 ev_view_get_property (GObject *object,
1636                       guint prop_id,
1637                       GValue *value,
1638                       GParamSpec *pspec)
1639 {
1640         EvView *view = EV_VIEW (object);
1641
1642         switch (prop_id)
1643         {
1644         case PROP_STATUS:
1645                 g_value_set_string (value, view->status);
1646                 break;
1647         case PROP_FIND_STATUS:
1648                 g_value_set_string (value, view->status);
1649                 break;
1650         case PROP_CONTINUOUS:
1651                 g_value_set_boolean (value, view->continuous);
1652                 break;
1653         case PROP_DUAL_PAGE:
1654                 g_value_set_boolean (value, view->dual_page);
1655                 break;
1656         case PROP_FULLSCREEN:
1657                 g_value_set_boolean (value, view->fullscreen);
1658                 break;
1659         case PROP_PRESENTATION:
1660                 g_value_set_boolean (value, view->presentation);
1661                 break;
1662         case PROP_SIZING_MODE:
1663                 g_value_set_enum (value, view->sizing_mode);
1664                 break;
1665         case PROP_ZOOM:
1666                 g_value_set_double (value, view->scale);
1667                 break;
1668         default:
1669                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1670         }
1671 }
1672
1673 static void
1674 ev_view_class_init (EvViewClass *class)
1675 {
1676         GObjectClass *object_class = G_OBJECT_CLASS (class);
1677         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
1678         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
1679         GtkBindingSet *binding_set;
1680
1681         object_class->finalize = ev_view_finalize;
1682         object_class->set_property = ev_view_set_property;
1683         object_class->get_property = ev_view_get_property;
1684
1685         widget_class->expose_event = ev_view_expose_event;
1686         widget_class->button_press_event = ev_view_button_press_event;
1687         widget_class->motion_notify_event = ev_view_motion_notify_event;
1688         widget_class->button_release_event = ev_view_button_release_event;
1689         widget_class->size_request = ev_view_size_request;
1690         widget_class->size_allocate = ev_view_size_allocate;
1691         widget_class->realize = ev_view_realize;
1692         widget_class->unrealize = ev_view_unrealize;
1693         widget_class->scroll_event = ev_view_scroll_event;
1694         gtk_object_class->destroy = ev_view_destroy;
1695
1696         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
1697         class->scroll_view = ev_view_scroll_view;
1698
1699         widget_class->set_scroll_adjustments_signal =
1700             g_signal_new ("set-scroll-adjustments",
1701                           G_OBJECT_CLASS_TYPE (object_class),
1702                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1703                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
1704                           NULL, NULL,
1705                           ev_marshal_VOID__OBJECT_OBJECT,
1706                           G_TYPE_NONE, 2,
1707                           GTK_TYPE_ADJUSTMENT,
1708                           GTK_TYPE_ADJUSTMENT);
1709
1710         signals[SIGNAL_SCROLL_VIEW] = g_signal_new ("scroll-view",
1711                          G_TYPE_FROM_CLASS (object_class),
1712                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1713                          G_STRUCT_OFFSET (EvViewClass, scroll_view),
1714                          NULL, NULL,
1715                          ev_marshal_VOID__ENUM_BOOLEAN,
1716                          G_TYPE_NONE, 2,
1717                          GTK_TYPE_SCROLL_TYPE,
1718                          G_TYPE_BOOLEAN);
1719
1720         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
1721                          G_TYPE_FROM_CLASS (object_class),
1722                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1723                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
1724                          NULL, NULL,
1725                          ev_marshal_VOID__VOID,
1726                          G_TYPE_NONE, 0, G_TYPE_NONE);
1727
1728         g_object_class_install_property (object_class,
1729                                          PROP_STATUS,
1730                                          g_param_spec_string ("status",
1731                                                               "Status Message",
1732                                                               "The status message",
1733                                                               NULL,
1734                                                               G_PARAM_READABLE));
1735
1736         g_object_class_install_property (object_class,
1737                                          PROP_FIND_STATUS,
1738                                          g_param_spec_string ("find-status",
1739                                                               "Find Status Message",
1740                                                               "The find status message",
1741                                                               NULL,
1742                                                               G_PARAM_READABLE));
1743
1744         g_object_class_install_property (object_class,
1745                                          PROP_CONTINUOUS,
1746                                          g_param_spec_boolean ("continuous",
1747                                                                "Continuous",
1748                                                                "Continuous scrolling mode",
1749                                                                TRUE,
1750                                                                G_PARAM_READWRITE));
1751
1752         g_object_class_install_property (object_class,
1753                                          PROP_DUAL_PAGE,
1754                                          g_param_spec_boolean ("dual-page",
1755                                                                "Dual Page",
1756                                                                "Two pages visible at once",
1757                                                                FALSE,
1758                                                                G_PARAM_READWRITE));
1759         g_object_class_install_property (object_class,
1760                                          PROP_FULLSCREEN,
1761                                          g_param_spec_boolean ("fullscreen",
1762                                                                "Full Screen",
1763                                                                "Draw page in a fullscreen fashion",
1764                                                                FALSE,
1765                                                                G_PARAM_READWRITE));
1766         g_object_class_install_property (object_class,
1767                                          PROP_PRESENTATION,
1768                                          g_param_spec_boolean ("presentation",
1769                                                                "Presentation",
1770                                                                "Draw page in presentation mode",
1771                                                                TRUE,
1772                                                                G_PARAM_READWRITE));
1773
1774         g_object_class_install_property (object_class,
1775                                          PROP_SIZING_MODE,
1776                                          g_param_spec_enum ("sizing-mode",
1777                                                             "Sizing Mode",
1778                                                             "Sizing Mode",
1779                                                             EV_TYPE_SIZING_MODE,
1780                                                             EV_SIZING_FIT_WIDTH,
1781                                                             G_PARAM_READWRITE));
1782
1783         g_object_class_install_property (object_class,
1784                                          PROP_ZOOM,
1785                                          g_param_spec_double ("zoom",
1786                                                               "Zoom factor",
1787                                                                "Zoom factor",
1788                                                                MIN_SCALE,
1789                                                                MAX_SCALE,
1790                                                                1.0,
1791                                                                G_PARAM_READWRITE));
1792
1793         binding_set = gtk_binding_set_by_class (class);
1794
1795         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
1796         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
1797         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
1798         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
1799 }
1800
1801 static void
1802 ev_view_init (EvView *view)
1803 {
1804         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
1805
1806         view->spacing = 5;
1807         view->scale = 1.0;
1808         view->current_page = 0;
1809         view->pressed_button = -1;
1810         view->cursor = EV_VIEW_CURSOR_NORMAL;
1811         view->drag_info.dragging = FALSE;
1812
1813         view->continuous = TRUE;
1814         view->dual_page = FALSE;
1815         view->presentation = FALSE;
1816         view->fullscreen = FALSE;
1817         view->sizing_mode = EV_SIZING_FIT_WIDTH;
1818         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1819 }
1820
1821 /*** Callbacks ***/
1822
1823 static void
1824 find_changed_cb (EvDocument *document, int page, EvView *view)
1825 {
1826         jump_to_find_page (view);
1827         jump_to_find_result (view);
1828         update_find_status_message (view);
1829
1830         if (view->current_page == page)
1831                 gtk_widget_queue_draw (GTK_WIDGET (view));
1832 }
1833
1834 static void
1835 job_finished_cb (EvPixbufCache *pixbuf_cache,
1836                  EvView        *view)
1837 {
1838         gtk_widget_queue_draw (GTK_WIDGET (view));
1839 }
1840
1841 static void
1842 page_changed_cb (EvPageCache *page_cache,
1843                  int          new_page,
1844                  EvView      *view)
1845 {
1846         if (view->current_page != new_page) {
1847
1848                 view->current_page = new_page;
1849                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
1850                 gtk_widget_queue_resize (GTK_WIDGET (view));
1851
1852                 if (EV_IS_DOCUMENT_FIND (view->document)) {
1853                         view->find_page = new_page;
1854                         view->find_result = 0;
1855                         update_find_status_message (view);
1856                 }
1857         }
1858 }
1859
1860 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
1861                                          EvView *view)
1862 {
1863         int dx = 0, dy = 0;
1864
1865         if (! GTK_WIDGET_REALIZED (view))
1866                 return;
1867
1868         if (view->hadjustment) {
1869                 dx = view->scroll_x - (int) view->hadjustment->value;
1870                 view->scroll_x = (int) view->hadjustment->value;
1871         } else {
1872                 view->scroll_x = 0;
1873         }
1874
1875         if (view->vadjustment) {
1876                 dy = view->scroll_y - (int) view->vadjustment->value;
1877                 view->scroll_y = (int) view->vadjustment->value;
1878         } else {
1879                 view->scroll_y = 0;
1880         }
1881
1882
1883         if (view->pending_resize)
1884                 gtk_widget_queue_draw (GTK_WIDGET (view));
1885         else
1886                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
1887
1888
1889         if (view->document)
1890                 view_update_range_and_current_page (view);}
1891
1892 GtkWidget*
1893 ev_view_new (void)
1894 {
1895         GtkWidget *view;
1896
1897         view = g_object_new (EV_TYPE_VIEW, NULL);
1898
1899         return view;
1900 }
1901
1902 void
1903 ev_view_set_document (EvView     *view,
1904                       EvDocument *document)
1905 {
1906         g_return_if_fail (EV_IS_VIEW (view));
1907
1908         if (document != view->document) {
1909                 if (view->document) {
1910                         g_signal_handlers_disconnect_by_func (view->document,
1911                                                               find_changed_cb,
1912                                                               view);
1913                         g_object_unref (view->document);
1914                         view->page_cache = NULL;
1915
1916                 }
1917
1918                 if (view->pixbuf_cache) {
1919                         g_object_unref (view->pixbuf_cache);
1920                         view->pixbuf_cache = NULL;
1921                 }
1922
1923                 view->document = document;
1924                 view->find_page = 0;
1925                 view->find_result = 0;
1926
1927                 if (view->document) {
1928                         g_object_ref (view->document);
1929                         if (EV_IS_DOCUMENT_FIND (view->document)) {
1930                                 g_signal_connect (view->document,
1931                                                   "find_changed",
1932                                                   G_CALLBACK (find_changed_cb),
1933                                                   view);
1934                         }
1935                         view->page_cache = ev_page_cache_get (view->document);
1936                         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
1937                         view->pixbuf_cache = ev_pixbuf_cache_new (view->document);
1938                         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
1939                 }
1940
1941                 gtk_widget_queue_resize (GTK_WIDGET (view));
1942         }
1943 }
1944
1945 /*** Zoom and sizing mode ***/
1946
1947 #define EPSILON 0.0000001
1948 void
1949 ev_view_set_zoom (EvView   *view,
1950                   double    factor,
1951                   gboolean  relative)
1952 {
1953         double scale;
1954
1955         if (relative)
1956                 scale = view->scale * factor;
1957         else
1958                 scale = factor;
1959
1960         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
1961
1962         if (ABS (view->scale - scale) < EPSILON)
1963                 return;
1964
1965         view->scale = scale;
1966         view->pending_resize = TRUE;
1967
1968         gtk_widget_queue_resize (GTK_WIDGET (view));
1969
1970         g_object_notify (G_OBJECT (view), "zoom");
1971 }
1972
1973 double
1974 ev_view_get_zoom (EvView *view)
1975 {
1976         return view->scale;
1977 }
1978
1979 void
1980 ev_view_set_continuous (EvView   *view,
1981                         gboolean  continuous)
1982 {
1983         g_return_if_fail (EV_IS_VIEW (view));
1984
1985         continuous = continuous != FALSE;
1986
1987         if (view->continuous != continuous) {
1988                 view->continuous = continuous;
1989                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
1990                 gtk_widget_queue_resize (GTK_WIDGET (view));
1991         }
1992
1993         g_object_notify (G_OBJECT (view), "continuous");
1994 }
1995
1996 void
1997 ev_view_set_dual_page (EvView   *view,
1998                        gboolean  dual_page)
1999 {
2000         g_return_if_fail (EV_IS_VIEW (view));
2001
2002         dual_page = dual_page != FALSE;
2003
2004         if (view->dual_page == dual_page)
2005                 return;
2006
2007         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2008         view->dual_page = dual_page;
2009         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2010          * preload_cache_size to be 2 if dual_page is set.
2011          */
2012         gtk_widget_queue_resize (GTK_WIDGET (view));
2013
2014         g_object_notify (G_OBJECT (view), "dual-page");
2015 }
2016
2017 void
2018 ev_view_set_fullscreen (EvView   *view,
2019                          gboolean  fullscreen)
2020 {
2021         g_return_if_fail (EV_IS_VIEW (view));
2022
2023         fullscreen = fullscreen != FALSE;
2024
2025         if (view->fullscreen != fullscreen) {
2026                 view->fullscreen = fullscreen;
2027                 gtk_widget_queue_resize (GTK_WIDGET (view));
2028         }
2029
2030         g_object_notify (G_OBJECT (view), "fullscreen");
2031 }
2032
2033 gboolean
2034 ev_view_get_fullscreen (EvView *view)
2035 {
2036         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2037
2038         return view->fullscreen;
2039 }
2040
2041 void
2042 ev_view_set_presentation (EvView   *view,
2043                           gboolean  presentation)
2044 {
2045         g_return_if_fail (EV_IS_VIEW (view));
2046
2047         presentation = presentation != FALSE;
2048
2049         if (view->presentation == presentation)
2050                 return;
2051
2052         view->presentation = presentation;
2053         gtk_widget_queue_resize (GTK_WIDGET (view));
2054         if (GTK_WIDGET_REALIZED (view)) {
2055                 if (view->presentation)
2056                         gdk_window_set_background (GTK_WIDGET(view)->window,
2057                                                    &GTK_WIDGET (view)->style->black);
2058                 else
2059                         gdk_window_set_background (GTK_WIDGET(view)->window,
2060                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
2061         }
2062
2063
2064         g_object_notify (G_OBJECT (view), "presentation");
2065 }
2066
2067 gboolean
2068 ev_view_get_presentation (EvView *view)
2069 {
2070         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2071
2072         return view->presentation;
2073 }
2074
2075 void
2076 ev_view_set_sizing_mode (EvView       *view,
2077                          EvSizingMode  sizing_mode)
2078 {
2079         g_return_if_fail (EV_IS_VIEW (view));
2080
2081         if (view->sizing_mode == sizing_mode)
2082                 return;
2083
2084         view->sizing_mode = sizing_mode;
2085         gtk_widget_queue_resize (GTK_WIDGET (view));
2086
2087         g_object_notify (G_OBJECT (view), "sizing-mode");
2088 }
2089
2090 EvSizingMode
2091 ev_view_get_sizing_mode (EvView *view)
2092 {
2093         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
2094
2095         return view->sizing_mode;
2096 }
2097
2098 gboolean
2099 ev_view_can_zoom_in (EvView *view)
2100 {
2101         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
2102 }
2103
2104 gboolean
2105 ev_view_can_zoom_out (EvView *view)
2106 {
2107         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
2108 }
2109
2110 void
2111 ev_view_zoom_in (EvView *view)
2112 {
2113         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2114
2115         view->pending_scroll = SCROLL_TO_CENTER;
2116         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
2117 }
2118
2119 void
2120 ev_view_zoom_out (EvView *view)
2121 {
2122         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2123
2124         view->pending_scroll = SCROLL_TO_CENTER;
2125         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
2126 }
2127
2128 static double
2129 zoom_for_size_fit_width (int doc_width,
2130                          int doc_height,
2131                          int target_width,
2132                          int target_height,
2133                          int vsb_width)
2134 {
2135         double scale;
2136
2137         scale = (double)target_width / doc_width;
2138
2139         if (doc_height * scale > target_height)
2140                 scale = (double) (target_width - vsb_width) / doc_width;
2141
2142         return scale;
2143 }
2144
2145 static double
2146 zoom_for_size_best_fit (int doc_width,
2147                         int doc_height,
2148                         int target_width,
2149                         int target_height,
2150                         int vsb_width,
2151                         int hsb_width)
2152 {
2153         double w_scale;
2154         double h_scale;
2155
2156         w_scale = (double)target_width / doc_width;
2157         h_scale = (double)target_height / doc_height;
2158
2159         if (doc_height * w_scale > target_height)
2160                 w_scale = (double) (target_width - vsb_width) / doc_width;
2161         if (doc_width * h_scale > target_width)
2162                 h_scale = (double) (target_height - hsb_width) / doc_height;
2163
2164         return MIN (w_scale, h_scale);
2165 }
2166
2167
2168 static void
2169 ev_view_zoom_for_size_presentation (EvView *view,
2170                                     int     width,
2171                                     int     height)
2172 {
2173         int doc_width, doc_height;
2174         gdouble scale;
2175
2176         ev_page_cache_get_size (view->page_cache,
2177                                 view->current_page,
2178                                 1.0,
2179                                 &doc_width,
2180                                 &doc_height);
2181         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
2182         ev_view_set_zoom (view, scale, FALSE);
2183 }
2184
2185 static void
2186 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
2187                            int     width,
2188                            int     height,
2189                            int     vsb_width,
2190                            int     hsb_height)
2191 {
2192         int doc_width, doc_height;
2193         GtkBorder border;
2194         gdouble scale;
2195
2196         ev_page_cache_get_max_width (view->page_cache,
2197                                      1.0,
2198                                      &doc_width);
2199         ev_page_cache_get_max_height (view->page_cache,
2200                                       1.0,
2201                                       &doc_height);
2202         compute_border (view, doc_width, doc_height, &border);
2203
2204         doc_width = doc_width * 2;
2205         width -= (2 * (border.left + border.right) + 3 * view->spacing);
2206         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2207
2208         /* FIXME: We really need to calculate the overall height here, not the
2209          * page height.  We assume there's always a vertical scrollbar for
2210          * now.  We need to fix this. */
2211         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2212                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2213         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2214                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2215         else
2216                 g_assert_not_reached ();
2217
2218         ev_view_set_zoom (view, scale, FALSE);
2219 }
2220
2221 static void
2222 ev_view_zoom_for_size_continuous (EvView *view,
2223                                   int     width,
2224                                   int     height,
2225                                   int     vsb_width,
2226                                   int     hsb_height)
2227 {
2228         int doc_width, doc_height;
2229         GtkBorder border;
2230         gdouble scale;
2231
2232         ev_page_cache_get_max_width (view->page_cache,
2233                                      1.0,
2234                                      &doc_width);
2235         ev_page_cache_get_max_height (view->page_cache,
2236                                       1.0,
2237                                       &doc_height);
2238         compute_border (view, doc_width, doc_height, &border);
2239
2240         width -= (border.left + border.right + 2 * view->spacing);
2241         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2242
2243         /* FIXME: We really need to calculate the overall height here, not the
2244          * page height.  We assume there's always a vertical scrollbar for
2245          * now.  We need to fix this. */
2246         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2247                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2248         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2249                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2250         else
2251                 g_assert_not_reached ();
2252
2253         ev_view_set_zoom (view, scale, FALSE);
2254 }
2255
2256 static void
2257 ev_view_zoom_for_size_dual_page (EvView *view,
2258                                  int     width,
2259                                  int     height,
2260                                  int     vsb_width,
2261                                  int     hsb_height)
2262 {
2263         GtkBorder border;
2264         gint doc_width, doc_height;
2265         gdouble scale;
2266         gint other_page;
2267
2268         other_page = view->current_page ^ 1;
2269
2270         /* Find the largest of the two. */
2271         ev_page_cache_get_size (view->page_cache,
2272                                 view->current_page,
2273                                 1.0,
2274                                 &doc_width, &doc_height);
2275
2276         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
2277                 gint width_2, height_2;
2278                 ev_page_cache_get_size (view->page_cache,
2279                                         other_page,
2280                                         1.0,
2281                                         &width_2, &height_2);
2282                 if (width_2 > doc_width)
2283                         doc_width = width_2;
2284                 if (height_2 > doc_height)
2285                         doc_height = height_2;
2286         }
2287         compute_border (view, doc_width, doc_height, &border);
2288
2289         doc_width = doc_width * 2;
2290         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
2291         height -= (border.top + border.bottom + 2 * view->spacing);
2292
2293         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2294                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2295         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2296                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2297         else
2298                 g_assert_not_reached ();
2299
2300         ev_view_set_zoom (view, scale, FALSE);
2301 }
2302
2303 static void
2304 ev_view_zoom_for_size_single_page (EvView *view,
2305                                    int     width,
2306                                    int     height,
2307                                    int     vsb_width,
2308                                    int     hsb_height)
2309 {
2310         int doc_width, doc_height;
2311         GtkBorder border;
2312         gdouble scale;
2313
2314         ev_page_cache_get_size (view->page_cache,
2315                                 view->current_page,
2316                                 1.0,
2317                                 &doc_width,
2318                                 &doc_height);
2319         /* Get an approximate border */
2320         compute_border (view, width, height, &border);
2321
2322         width -= (border.left + border.right + 2 * view->spacing);
2323         height -= (border.top + border.bottom + 2 * view->spacing);
2324
2325         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2326                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2327         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2328                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2329         else
2330                 g_assert_not_reached ();
2331
2332         ev_view_set_zoom (view, scale, FALSE);
2333 }
2334
2335 void
2336 ev_view_set_zoom_for_size (EvView *view,
2337                            int     width,
2338                            int     height,
2339                            int     vsb_width,
2340                            int     hsb_height)
2341 {
2342         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2343                           view->sizing_mode == EV_SIZING_BEST_FIT);
2344         g_return_if_fail (width >= 0);
2345         g_return_if_fail (height >= 0);
2346
2347         if (view->document == NULL)
2348                 return;
2349
2350         if (view->presentation)
2351                 ev_view_zoom_for_size_presentation (view, width, height);
2352         else if (view->continuous && view->dual_page)
2353                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
2354         else if (view->continuous)
2355                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
2356         else if (view->dual_page)
2357                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
2358         else
2359                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
2360 }
2361
2362 /*** Status text messages ***/
2363
2364 const char *
2365 ev_view_get_status (EvView *view)
2366 {
2367         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2368
2369         return view->status;
2370 }
2371
2372 static void
2373 ev_view_set_status (EvView *view, const char *message)
2374 {
2375         g_return_if_fail (EV_IS_VIEW (view));
2376
2377         if (message != view->status) {
2378                 g_free (view->status);
2379                 view->status = g_strdup (message);
2380                 g_object_notify (G_OBJECT (view), "status");
2381         }
2382 }
2383
2384 static void
2385 update_find_status_message (EvView *view)
2386 {
2387         char *message;
2388
2389         if (view->current_page == view->find_page) {
2390                 int results;
2391
2392                 results = ev_document_find_get_n_results
2393                                 (EV_DOCUMENT_FIND (view->document),
2394                                  view->current_page);
2395                 /* TRANS: Sometimes this could be better translated as
2396                    "%d hit(s) on this page".  Therefore this string
2397                    contains plural cases. */
2398                 message = g_strdup_printf (ngettext ("%d found on this page",
2399                                                      "%d found on this page",
2400                                                      results),
2401                                            results);
2402         } else {
2403                 double percent;
2404
2405                 percent = ev_document_find_get_progress
2406                                 (EV_DOCUMENT_FIND (view->document));
2407                 if (percent >= (1.0 - 1e-10)) {
2408                         message = g_strdup (_("Not found"));
2409                 } else {
2410                         message = g_strdup_printf (_("%3d%% remaining to search"),
2411                                                    (int) ((1.0 - percent) * 100));
2412                 }
2413
2414         }
2415         ev_view_set_find_status (view, message);
2416 }
2417
2418 const char *
2419 ev_view_get_find_status (EvView *view)
2420 {
2421         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2422
2423         return view->find_status;
2424 }
2425
2426 static void
2427 ev_view_set_find_status (EvView *view, const char *message)
2428 {
2429         g_return_if_fail (EV_IS_VIEW (view));
2430
2431         g_free (view->find_status);
2432         view->find_status = g_strdup (message);
2433         g_object_notify (G_OBJECT (view), "find-status");
2434 }
2435
2436 /*** Find ***/
2437
2438 static void
2439 jump_to_find_result (EvView *view)
2440 {
2441         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2442         EvRectangle rect;
2443         GdkRectangle view_rect;
2444         int n_results;
2445         int page = view->find_page;
2446
2447         n_results = ev_document_find_get_n_results (find, page);
2448
2449         if (n_results > view->find_result) {
2450                 ev_document_find_get_result
2451                         (find, page, view->find_result, &rect);
2452
2453                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
2454                 ensure_rectangle_is_visible (view, &view_rect);
2455         }
2456 }
2457
2458 static void
2459 jump_to_find_page (EvView *view)
2460 {
2461         int n_pages, i;
2462
2463         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2464
2465         for (i = 0; i < n_pages; i++) {
2466                 int has_results;
2467                 int page;
2468
2469                 page = i + view->find_page;
2470                 if (page >= n_pages) {
2471                         page = page - n_pages;
2472                 }
2473
2474                 has_results = ev_document_find_page_has_results
2475                                 (EV_DOCUMENT_FIND (view->document), page);
2476                 if (has_results == -1) {
2477                         view->find_page = page;
2478                         break;
2479                 } else if (has_results == 1) {
2480                         ev_page_cache_set_current_page (view->page_cache, page);
2481                         jump_to_find_result (view);
2482                         break;
2483                 }
2484         }
2485 }
2486
2487 gboolean
2488 ev_view_can_find_next (EvView *view)
2489 {
2490         int n_results = 0;
2491
2492         if (EV_IS_DOCUMENT_FIND (view->document)) {
2493                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2494
2495                 n_results = ev_document_find_get_n_results (find, view->current_page);
2496         }
2497
2498         return n_results > 0;
2499 }
2500
2501 void
2502 ev_view_find_next (EvView *view)
2503 {
2504         EvPageCache *page_cache;
2505         int n_results, n_pages;
2506         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2507
2508         page_cache = ev_page_cache_get (view->document);
2509         n_results = ev_document_find_get_n_results (find, view->current_page);
2510
2511         n_pages = ev_page_cache_get_n_pages (page_cache);
2512
2513         view->find_result++;
2514
2515         if (view->find_result >= n_results) {
2516                 view->find_result = 0;
2517                 view->find_page++;
2518
2519                 if (view->find_page >= n_pages) {
2520                         view->find_page = 0;
2521                 }
2522
2523                 jump_to_find_page (view);
2524         } else {
2525                 jump_to_find_result (view);
2526                 gtk_widget_queue_draw (GTK_WIDGET (view));
2527         }
2528 }
2529
2530 void
2531 ev_view_find_previous (EvView *view)
2532 {
2533         int n_results, n_pages;
2534         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2535         EvPageCache *page_cache;
2536
2537         page_cache = ev_page_cache_get (view->document);
2538
2539         n_results = ev_document_find_get_n_results (find, view->current_page);
2540
2541         n_pages = ev_page_cache_get_n_pages (page_cache);
2542
2543         view->find_result--;
2544
2545         if (view->find_result < 0) {
2546                 view->find_result = 0;
2547                 view->find_page--;
2548
2549                 if (view->find_page < 0) {
2550                         view->find_page = n_pages - 1;
2551                 }
2552
2553                 jump_to_find_page (view);
2554         } else {
2555                 jump_to_find_result (view);
2556                 gtk_widget_queue_draw (GTK_WIDGET (view));
2557         }
2558 }
2559
2560 /*** Selections ***/
2561
2562 static void
2563 compute_selections (EvView *view, GdkRectangle *view_rect)
2564 {
2565         int n_pages, i;
2566
2567         clear_selection (view);
2568
2569         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2570         for (i = 0; i < n_pages; i++) {
2571                 GdkRectangle page_area;
2572                 GtkBorder border;
2573
2574                 if (get_page_extents (view, i, &page_area, &border)) {
2575                         GdkRectangle overlap;
2576
2577                         if (gdk_rectangle_intersect (&page_area, view_rect, &overlap)) {
2578                                 EvViewSelection *selection;
2579
2580                                 selection = g_new0 (EvViewSelection, 1);
2581                                 selection->page = i;
2582                                 view_rect_to_doc_rect (view, &overlap, &page_area,
2583                                                        &(selection->rect));
2584
2585                                 view->selections = g_list_append
2586                                                 (view->selections, selection);
2587                         }
2588                 }
2589         }
2590 }
2591
2592 static void
2593 clear_selection (EvView *view)
2594 {
2595         g_list_foreach (view->selections, (GFunc)g_free, NULL);
2596         view->selections = NULL;
2597 }
2598
2599
2600 void
2601 ev_view_select_all (EvView *view)
2602 {
2603         int n_pages, i;
2604
2605         clear_selection (view);
2606
2607         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2608         for (i = 0; i < n_pages; i++) {
2609                 int width, height;
2610                 EvViewSelection *selection;
2611
2612                 ev_page_cache_get_size (view->page_cache,
2613                                         i, 1.0, &width, &height);
2614
2615                 selection = g_new0 (EvViewSelection, 1);
2616                 selection->page = i;
2617                 selection->rect.x1 = selection->rect.y1 = 0;
2618                 selection->rect.x2 = width;
2619                 selection->rect.y2 = height;
2620
2621                 view->selections = g_list_append (view->selections, selection);
2622         }
2623
2624         gtk_widget_queue_draw (GTK_WIDGET (view));
2625 }
2626
2627 static char *
2628 get_selected_text (EvView *ev_view)
2629 {
2630         GString *text;
2631         GList *l;
2632
2633         text = g_string_new (NULL);
2634
2635         ev_document_doc_mutex_lock ();
2636
2637         for (l = ev_view->selections; l != NULL; l = l->next) {
2638                 EvViewSelection *selection = (EvViewSelection *)l->data;
2639                 char *tmp;
2640
2641                 tmp = ev_document_get_text (ev_view->document,
2642                                             selection->page,
2643                                             &selection->rect);
2644                 g_string_append (text, tmp);
2645                 g_free (tmp);
2646         }
2647
2648         ev_document_doc_mutex_unlock ();
2649
2650         return g_string_free (text, FALSE);
2651 }
2652
2653 void
2654 ev_view_copy (EvView *ev_view)
2655 {
2656         GtkClipboard *clipboard;
2657         char *text;
2658
2659         if (!ev_document_can_get_text (ev_view->document)) {
2660                 return;
2661         }
2662
2663         text = get_selected_text (ev_view);
2664         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
2665                                               GDK_SELECTION_CLIPBOARD);
2666         gtk_clipboard_set_text (clipboard, text, -1);
2667         g_free (text);
2668 }
2669
2670 static void
2671 ev_view_primary_get_cb (GtkClipboard     *clipboard,
2672                         GtkSelectionData *selection_data,
2673                         guint             info,
2674                         gpointer          data)
2675 {
2676         EvView *ev_view = EV_VIEW (data);
2677         char *text;
2678
2679         if (!ev_document_can_get_text (ev_view->document)) {
2680                 return;
2681         }
2682
2683         text = get_selected_text (ev_view);
2684         gtk_selection_data_set_text (selection_data, text, -1);
2685         g_free (text);
2686 }
2687
2688 static void
2689 ev_view_primary_clear_cb (GtkClipboard *clipboard,
2690                           gpointer      data)
2691 {
2692         EvView *view = EV_VIEW (data);
2693
2694         clear_selection (view);
2695 }
2696
2697 static void
2698 ev_view_update_primary_selection (EvView *ev_view)
2699 {
2700         GtkClipboard *clipboard;
2701
2702         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
2703                                               GDK_SELECTION_PRIMARY);
2704
2705         if (ev_view->selections) {
2706                 if (!gtk_clipboard_set_with_owner (clipboard,
2707                                                    targets,
2708                                                    G_N_ELEMENTS (targets),
2709                                                    ev_view_primary_get_cb,
2710                                                    ev_view_primary_clear_cb,
2711                                                    G_OBJECT (ev_view)))
2712                         ev_view_primary_clear_cb (clipboard, ev_view);
2713         } else {
2714                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
2715                         gtk_clipboard_clear (clipboard);
2716         }
2717 }
2718
2719 /*** Cursor operations ***/
2720
2721 static GdkCursor *
2722 ev_view_create_invisible_cursor(void)
2723 {
2724        GdkBitmap *empty;
2725        GdkColor black = { 0, 0, 0, 0 };
2726        static char bits[] = { 0x00 };
2727
2728        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
2729
2730        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
2731 }
2732
2733 static void
2734 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
2735 {
2736         GdkCursor *cursor = NULL;
2737         GdkDisplay *display;
2738         GtkWidget *widget;
2739
2740         if (view->cursor == new_cursor) {
2741                 return;
2742         }
2743
2744         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
2745         display = gtk_widget_get_display (widget);
2746         view->cursor = new_cursor;
2747
2748         switch (new_cursor) {
2749                 case EV_VIEW_CURSOR_NORMAL:
2750                         gdk_window_set_cursor (widget->window, NULL);
2751                         break;
2752                 case EV_VIEW_CURSOR_LINK:
2753                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
2754                         break;
2755                 case EV_VIEW_CURSOR_WAIT:
2756                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
2757                         break;
2758                 case EV_VIEW_CURSOR_HIDDEN:
2759                         cursor = ev_view_create_invisible_cursor ();
2760                         break;
2761                 case EV_VIEW_CURSOR_DRAG:
2762                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
2763                         break;
2764         }
2765
2766         if (cursor) {
2767                 gdk_window_set_cursor (widget->window, cursor);
2768                 gdk_cursor_unref (cursor);
2769                 gdk_flush();
2770         }
2771 }
2772
2773 void
2774 ev_view_hide_cursor (EvView *view)
2775 {
2776        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
2777 }
2778
2779 void
2780 ev_view_show_cursor (EvView *view)
2781 {
2782        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
2783 }
2784
2785 /*** Enum description for usage in signal ***/
2786
2787 GType
2788 ev_sizing_mode_get_type (void)
2789 {
2790   static GType etype = 0;
2791   if (etype == 0) {
2792     static const GEnumValue values[] = {
2793       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
2794       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
2795       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
2796       { 0, NULL, NULL }
2797     };
2798     etype = g_enum_register_static ("EvSizingMode", values);
2799   }
2800   return etype;
2801 }
2802