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         GtkBorder border;
 145
 146         gboolean continuous;
 147         gboolean dual_page;
 148         gboolean fullscreen;
 149         gboolean presentation;
 150         EvSizingMode sizing_mode;
 151
 152         PendingScroll pending_scroll;
 153         gboolean pending_resize;
 154 };
 155
 156 struct _EvViewClass {
 157         GtkWidgetClass parent_class;
 158
 159         void    (*set_scroll_adjustments) (EvView         *view,
 160                                            GtkAdjustment  *hadjustment,
 161                                            GtkAdjustment  *vadjustment);
 162         void    (*scroll_view)            (EvView         *view,
 163                                            GtkScrollType   scroll,
 164                                            gboolean        horizontal);
 165         void    (*zoom_invalid)           (EvView         *view);
 166 };
 167
 168 /*** Scrolling ***/
 169 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 170                                                               GtkAdjustment      *hadjustment,
 171                                                               GtkAdjustment      *vadjustment);
 172 static void       view_update_range_and_current_page         (EvView             *view);
 173 static void       set_scroll_adjustment                      (EvView             *view,
 174                                                               GtkOrientation      orientation,
 175                                                               GtkAdjustment      *adjustment);
 176 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 177                                                               GtkAdjustment      *hadjustment,
 178                                                               GtkAdjustment      *vadjustment);
 179 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 180                                                               guint               keyval,
 181                                                               GtkScrollType       scroll,
 182                                                               gboolean            horizontal);
 183 static void       ev_view_scroll_view                        (EvView             *view,
 184                                                               GtkScrollType       scroll,
 185                                                               gboolean            horizontal);
 186 static void       ensure_rectangle_is_visible                (EvView             *view,
 187                                                               GdkRectangle       *rect);
 188
 189 /*** Geometry computations ***/
 190 static void       compute_border                             (EvView             *view,
 191                                                               int                 width,
 192                                                               int                 height,
 193                                                               GtkBorder          *border);
 194 static gboolean   get_page_extents                           (EvView             *view,
 195                                                               gint                page,
 196                                                               GdkRectangle       *page_area,
 197                                                               GtkBorder          *border);
 198 static void       view_rect_to_doc_rect                      (EvView             *view,
 199                                                               GdkRectangle       *view_rect,
 200                                                               GdkRectangle       *page_area,
 201                                                               EvRectangle        *doc_rect);
 202 static void       doc_rect_to_view_rect                      (EvView             *view,
 203                                                               int                 page,
 204                                                               EvRectangle        *doc_rect,
 205                                                               GdkRectangle       *view_rect);
 206 static void       get_bounding_box_size                      (EvView             *view,
 207                                                               int                *max_width,
 208                                                               int                *max_height);
 209 static void       find_page_at_location                      (EvView             *view,
 210                                                               gdouble             x,
 211                                                               gdouble             y,
 212                                                               gint               *page,
 213                                                               gint               *x_offset,
 214                                                               gint               *y_offset);
 215
 216 /*** Hyperrefs ***/
 217 static EvLink*    get_link_at_location                       (EvView             *view,
 218                                                               gdouble             x,
 219                                                               gdouble             y);
 220 static void       go_to_link                                 (EvView             *view,
 221                                                               EvLink             *link);
 222 static char*      status_message_from_link                   (EvView             *view,
 223                                                               EvLink             *link);
 224
 225 /*** GtkWidget implementation ***/
 226 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 227                                                               GtkRequisition     *requisition);
 228 static void       ev_view_size_request_continuous            (EvView             *view,
 229                                                               GtkRequisition     *requisition);
 230 static void       ev_view_size_request_dual_page             (EvView             *view,
 231                                                               GtkRequisition     *requisition);
 232 static void       ev_view_size_request_single_page           (EvView             *view,
 233                                                               GtkRequisition     *requisition);
 234 static void       ev_view_size_request                       (GtkWidget          *widget,
 235                                                               GtkRequisition     *requisition);
 236 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 237                                                               GtkAllocation      *allocation);
 238 static void       ev_view_realize                            (GtkWidget          *widget);
 239 static void       ev_view_unrealize                          (GtkWidget          *widget);
 240 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 241                                                               GdkEventScroll     *event);
 242 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 243                                                               GdkEventExpose     *event);
 244 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 245                                                               GdkEventButton     *event);
 246 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 247                                                               GdkEventMotion     *event);
 248 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 249                                                               GdkEventButton     *event);
 250
 251 /*** Drawing ***/
 252 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 253 static void       draw_rubberband                            (GtkWidget          *widget,
 254                                                               GdkWindow          *window,
 255                                                               const GdkRectangle *rect,
 256                                                               guchar              alpha);
 257 static void       highlight_find_results                     (EvView             *view,
 258                                                               int                 page);
 259 static void       draw_one_page                              (EvView             *view,
 260                                                               gint                page,
 261                                                               GdkRectangle       *page_area,
 262                                                               GtkBorder          *border,
 263                                                               GdkRectangle       *expose_area);
 264
 265 /*** Callbacks ***/
 266 static void       find_changed_cb                            (EvDocument         *document,
 267                                                               int                 page,
 268                                                               EvView             *view);
 269 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 270                                                               EvView             *view);
 271 static void       page_changed_cb                            (EvPageCache        *page_cache,
 272                                                               int                 new_page,
 273                                                               EvView             *view);
 274 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 275                                                               EvView             *view);
 276
 277 /*** GObject ***/
 278 static void       ev_view_finalize                           (GObject            *object);
 279 static void       ev_view_destroy                            (GtkObject          *object);
 280 static void       ev_view_set_property                       (GObject            *object,
 281                                                               guint               prop_id,
 282                                                               const GValue       *value,
 283                                                               GParamSpec         *pspec);
 284 static void       ev_view_get_property                       (GObject            *object,
 285                                                               guint               prop_id,
 286                                                               GValue             *value,
 287                                                               GParamSpec         *pspec);
 288 static void       ev_view_class_init                         (EvViewClass        *class);
 289 static void       ev_view_init                               (EvView             *view);
 290
 291 /*** Zoom and sizing ***/
 292 static double   zoom_for_size_fit_width                      (int doc_width,
 293                                                               int doc_height,
 294                                                               int target_width,
 295                                                               int target_height,
 296                                                               int vsb_width);
 297 static double   zoom_for_size_best_fit                       (int doc_width,
 298                                                               int doc_height,
 299                                                               int target_width,
 300                                                               int target_height,
 301                                                               int vsb_width,
 302                                                               int hsb_width);
 303 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 304                                                               int     width,
 305                                                               int     height);
 306 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 307                                                                 int     width,
 308                                                                 int     height,
 309                                                                 int     vsb_width,
 310                                                                 int     hsb_height);
 311 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 312                                                                 int     width,
 313                                                                 int     height,
 314                                                                 int     vsb_width,
 315                                                                 int     hsb_height);
 316 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 317                                                                 int     width,
 318                                                                 int     height,
 319                                                                 int     vsb_width,
 320                                                                 int     hsb_height);
 321 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 322                                                                 int     width,
 323                                                                 int     height,
 324                                                                 int     vsb_width,
 325                                                                 int     hsb_height);
 326 /*** Cursors ***/
 327 static GdkCursor* ev_view_create_invisible_cursor            (void);
 328 static void       ev_view_set_cursor                         (EvView             *view,
 329                                                               EvViewCursor        new_cursor);
 330
 331 /*** Status messages ***/
 332 static void       ev_view_set_status                         (EvView             *view,
 333                                                               const char         *message);
 334 static void       update_find_status_message                 (EvView             *view);
 335 static void       ev_view_set_find_status                    (EvView             *view,
 336                                                               const char         *message);
 337 /*** Find ***/
 338 static void       jump_to_find_result                        (EvView             *view);
 339 static void       jump_to_find_page                          (EvView             *view);
 340
 341 /*** Selection ***/
 342 static void       compute_selections                         (EvView             *view,
 343                                                               GdkRectangle       *view_rect);
 344 static void       clear_selection                            (EvView             *view);
 345 static char*      get_selected_text                          (EvView             *ev_view);
 346 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 347                                                               GtkSelectionData   *selection_data,
 348                                                               guint               info,
 349                                                               gpointer            data);
 350 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 351                                                               gpointer            data);
 352 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 353
 354
 355 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 356
 357 static void
 358 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 359 {
 360         int max_width, max_height, n_rows;
 361
 362         get_bounding_box_size (view, &max_width, &max_height);
 363
 364         if (orientation == GTK_ORIENTATION_VERTICAL) {
 365                 if (view->continuous) {
 366                         n_rows = view->dual_page ? view->current_page / 2 : view->current_page;
 367
 368                         gtk_adjustment_clamp_page (view->vadjustment,
 369                                                    (max_height + view->spacing) * n_rows,
 370                                                    (max_height + view->spacing) * n_rows +
 371                                                    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                         if (view->current_page % 2 == 0) {
 379                                 gtk_adjustment_set_value (view->hadjustment,
 380                                                           view->hadjustment->lower);
 381                         } else {
 382                                 gtk_adjustment_clamp_page (view->hadjustment,
 383                                                            view->hadjustment->lower +
 384                                                            max_width + view->spacing,
 385                                                            view->hadjustment->lower +
 386                                                            max_width + view->spacing +
 387                                                            view->hadjustment->page_size);
 388                         }
 389                 } else {
 390                         gtk_adjustment_set_value (view->hadjustment,
 391                                                   CLAMP (view->hadjustment->value,
 392                                                   view->hadjustment->lower,
 393                                                   view->hadjustment->upper -
 394                                                   view->hadjustment->page_size));
 395                 }
 396         }
 397 }
 398
 399 static void
 400 view_set_adjustment_values (EvView         *view,
 401                             GtkOrientation  orientation)
 402 {
 403         GtkWidget *widget = GTK_WIDGET (view);
 404         GtkAdjustment *adjustment;
 405         int requisition;
 406         int allocation;
 407
 408         double factor;
 409         gint new_value;
 410
 411         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 412                 requisition = widget->requisition.width;
 413                 allocation = widget->allocation.width;
 414                 adjustment = view->hadjustment;
 415         } else {
 416                 requisition = widget->requisition.height;
 417                 allocation = widget->allocation.height;
 418                 adjustment = view->vadjustment;
 419         }
 420
 421         if (!adjustment)
 422                 return;
 423
 424         factor = 1.0;
 425         switch (view->pending_scroll) {
 426                 case SCROLL_TO_KEEP_POSITION:
 427                         factor = adjustment->value / adjustment->upper;
 428                         break;
 429                 case SCROLL_TO_CURRENT_PAGE:
 430                         break;
 431                 case SCROLL_TO_CENTER:
 432                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 433                         break;
 434         }
 435
 436         adjustment->page_size = allocation;
 437         adjustment->step_increment = allocation * 0.1;
 438         adjustment->page_increment = allocation * 0.9;
 439         adjustment->lower = 0;
 440         adjustment->upper = MAX (allocation, requisition);
 441
 442         switch (view->pending_scroll) {
 443                 case SCROLL_TO_KEEP_POSITION:
 444                         new_value = CLAMP (adjustment->upper * factor, 0, adjustment->upper - adjustment->page_size);
 445                         gtk_adjustment_set_value (adjustment, (int)new_value);
 446                         break;
 447                 case SCROLL_TO_CURRENT_PAGE:
 448                         scroll_to_current_page (view, orientation);
 449                         break;
 450                 case SCROLL_TO_CENTER:
 451                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5,
 452                                            0, adjustment->upper - adjustment->page_size);
 453                         gtk_adjustment_set_value (adjustment, (int)new_value);
 454                         break;
 455         }
 456
 457         gtk_adjustment_changed (adjustment);
 458 }
 459
 460 static void
 461 view_update_range_and_current_page (EvView *view)
 462 {
 463         /* Presentation trumps all other modes */
 464         if (view->presentation) {
 465                 view->start_page = view->current_page;
 466                 view->end_page = view->current_page;
 467         } else if (view->continuous) {
 468                 GdkRectangle current_area, unused, page_area;
 469                 gint current_page;
 470                 gboolean found = FALSE;
 471                 int i;
 472
 473                 get_bounding_box_size (view, &(page_area.width), &(page_area.height));
 474                 page_area.x = view->spacing;
 475                 page_area.y = view->spacing;
 476
 477                 if (view->hadjustment) {
 478                         current_area.x = view->hadjustment->value;
 479                         current_area.width = view->hadjustment->page_size;
 480                 } else {
 481                         current_area.x = page_area.x;
 482                         current_area.width = page_area.width;
 483                 }
 484
 485                 if (view->vadjustment) {
 486                         current_area.y = view->vadjustment->value;
 487                         current_area.height = view->vadjustment->page_size;
 488                 } else {
 489                         current_area.y = page_area.y;
 490                         current_area.height = page_area.height;
 491                 }
 492
 493                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 494                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 495                                 if (! found) {
 496                                         view->start_page = i;
 497                                         found = TRUE;
 498
 499                                 }
 500                                 view->end_page = i;
 501                         } else if (found) {
 502                                 break;
 503                         }
 504                         if (view->dual_page) {
 505                                 if (i % 2 == 0) {
 506                                         page_area.x += page_area.width + view->spacing;
 507                                 } else {
 508                                         page_area.x = view->spacing;
 509                                         page_area.y += page_area.height + view->spacing;
 510                                 }
 511                         } else {
 512                                 page_area.y += page_area.height + view->spacing;
 513                         }
 514                 }
 515
 516                 current_page = ev_page_cache_get_current_page (view->page_cache);
 517
 518                 if (current_page < view->start_page || current_page > view->end_page) {
 519                         view->current_page = view->start_page;
 520                         ev_page_cache_set_current_page (view->page_cache, view->start_page);
 521                 }
 522         } else {
 523                 if (view->dual_page) {
 524                         if (view->current_page % 2 == 0) {
 525                                 view->start_page = view->current_page;
 526                                 if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 527                                         view->end_page = view->start_page + 1;
 528                         } else {
 529                                 view->start_page = view->current_page - 1;
 530                                 view->end_page = view->current_page;
 531                         }
 532                 } else {
 533                         view->start_page = view->current_page;
 534                         view->end_page = view->current_page;
 535                 }
 536         }
 537
 538         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 539                                         view->start_page,
 540                                         view->end_page,
 541                                         view->scale);
 542 }
 543
 544 static void
 545 set_scroll_adjustment (EvView *view,
 546                        GtkOrientation  orientation,
 547                        GtkAdjustment  *adjustment)
 548 {
 549         GtkAdjustment **to_set;
 550
 551         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 552                 to_set = &view->hadjustment;
 553         else
 554                 to_set = &view->vadjustment;
 555
 556         if (*to_set != adjustment) {
 557                 if (*to_set) {
 558                         g_signal_handlers_disconnect_by_func (*to_set,
 559                                                               (gpointer) on_adjustment_value_changed,
 560                                                               view);
 561                         g_object_unref (*to_set);
 562                 }
 563
 564                 *to_set = adjustment;
 565                 view_set_adjustment_values (view, orientation);
 566
 567                 if (*to_set) {
 568                         g_object_ref (*to_set);
 569                         g_signal_connect (*to_set, "value_changed",
 570                                           G_CALLBACK (on_adjustment_value_changed), view);
 571                 }
 572         }
 573 }
 574
 575 static void
 576 ev_view_set_scroll_adjustments (EvView *view,
 577                                 GtkAdjustment  *hadjustment,
 578                                 GtkAdjustment  *vadjustment)
 579 {
 580         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 581         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 582
 583         on_adjustment_value_changed (NULL, view);
 584 }
 585
 586 static void
 587 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 588                            guint           keyval,
 589                            GtkScrollType   scroll,
 590                            gboolean        horizontal)
 591 {
 592   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 593
 594   gtk_binding_entry_add_signal (binding_set, keyval, 0,
 595                                 "scroll_view", 2,
 596                                 GTK_TYPE_SCROLL_TYPE, scroll,
 597                                 G_TYPE_BOOLEAN, horizontal);
 598   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
 599                                 "scroll_view", 2,
 600                                 GTK_TYPE_SCROLL_TYPE, scroll,
 601                                 G_TYPE_BOOLEAN, horizontal);
 602 }
 603
 604 void
 605 ev_view_scroll (EvView        *view,
 606                 EvScrollType   scroll)
 607 {
 608         GtkAdjustment *adjustment;
 609         double value, increment;
 610         gboolean first_page = FALSE;
 611         gboolean last_page = FALSE;
 612
 613         /* Assign values for increment and vertical adjustment */
 614         adjustment = view->vadjustment;
 615         increment = adjustment->page_size * 0.75;
 616         value = adjustment->value;
 617
 618         /* Assign boolean for first and last page */
 619         if (view->current_page == 0)
 620                 first_page = TRUE;
 621         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 622                 last_page = TRUE;
 623
 624         switch (scroll) {
 625                 case EV_SCROLL_PAGE_BACKWARD:
 626                         /* Do not jump backwards if at the first page */
 627                         if (value == (adjustment->lower) && first_page) {
 628                                 /* Do nothing */
 629                                 /* At the top of a page, assign the upper bound limit of previous page */
 630                         } else if (value == (adjustment->lower)) {
 631                                 value = adjustment->upper - adjustment->page_size;
 632                                 ev_page_cache_set_current_page (view->page_cache, view->current_page - 1);
 633                                 /* Jump to the top */
 634                         } else {
 635                                 value = MAX (value - increment, adjustment->lower);
 636                         }
 637                         break;
 638                 case EV_SCROLL_PAGE_FORWARD:
 639                         /* Do not jump forward if at the last page */
 640                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 641                                 /* Do nothing */
 642                         /* At the bottom of a page, assign the lower bound limit of next page */
 643                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 644                                 value = 0;
 645                                 ev_page_cache_set_current_page (view->page_cache, view->current_page + 1);
 646                         /* Jump to the bottom */
 647                         } else {
 648                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 649                         }
 650                         break;
 651                 default:
 652                         break;
 653         }
 654
 655         gtk_adjustment_set_value (adjustment, value);
 656 }
 657
 658 static void
 659 ev_view_scroll_view (EvView *view,
 660                      GtkScrollType scroll,
 661                      gboolean horizontal)
 662 {
 663         GtkAdjustment *adjustment;
 664         double value;
 665
 666         if (horizontal) {
 667                 adjustment = view->hadjustment;
 668         } else {
 669                 adjustment = view->vadjustment;
 670         }
 671
 672         value = adjustment->value;
 673
 674         switch (scroll) {
 675                 case GTK_SCROLL_STEP_BACKWARD:
 676                         value -= adjustment->step_increment;
 677                         break;
 678                 case GTK_SCROLL_STEP_FORWARD:
 679                         value += adjustment->step_increment;
 680                         break;
 681                 default:
 682                         break;
 683         }
 684
 685         value = CLAMP (value, adjustment->lower,
 686                        adjustment->upper - adjustment->page_size);
 687
 688         gtk_adjustment_set_value (adjustment, value);
 689 }
 690
 691 #define MARGIN 5
 692
 693 static void
 694 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 695 {
 696         GtkWidget *widget = GTK_WIDGET (view);
 697         GtkAdjustment *adjustment;
 698         int value;
 699
 700         adjustment = view->vadjustment;
 701
 702         if (rect->y < adjustment->value) {
 703                 value = MAX (adjustment->lower, rect->y - MARGIN);
 704                 gtk_adjustment_set_value (view->vadjustment, value);
 705         } else if (rect->y + rect->height >
 706                    adjustment->value + widget->allocation.height) {
 707                 value = MIN (adjustment->upper, rect->y + rect->height -
 708                              widget->allocation.height + MARGIN);
 709                 gtk_adjustment_set_value (view->vadjustment, value);
 710         }
 711
 712         adjustment = view->hadjustment;
 713
 714         if (rect->x < adjustment->value) {
 715                 value = MAX (adjustment->lower, rect->x - MARGIN);
 716                 gtk_adjustment_set_value (view->hadjustment, value);
 717         } else if (rect->x + rect->height >
 718                    adjustment->value + widget->allocation.width) {
 719                 value = MIN (adjustment->upper, rect->x + rect->width -
 720                              widget->allocation.width + MARGIN);
 721                 gtk_adjustment_set_value (view->hadjustment, value);
 722         }
 723 }
 724
 725 /*** Geometry computations ***/
 726
 727 static void
 728 compute_border (EvView *view, int width, int height, GtkBorder *border)
 729 {
 730         if (view->presentation) {
 731                 border->left = 0;
 732                 border->right = 0;
 733                 border->top = 0;
 734                 border->bottom = 0;
 735         } else {
 736                 ev_document_misc_get_page_border_size (width, height, border);
 737         }
 738 }
 739
 740 static gboolean
 741 get_page_extents (EvView       *view,
 742                   gint          page,
 743                   GdkRectangle *page_area,
 744                   GtkBorder    *border)
 745 {
 746         GtkWidget *widget;
 747         int width, height;
 748
 749         widget = GTK_WIDGET (view);
 750
 751         /* Quick sanity check */
 752         if (view->presentation) {
 753                 if (view->current_page != page)
 754                         return FALSE;
 755         } else if (view->continuous) {
 756                 if (page < view->start_page ||
 757                     page > view->end_page)
 758                         return FALSE;
 759         } else if (view->dual_page) {
 760                 if (ABS (page - view->current_page) > 1)
 761                         return FALSE;
 762         } else {
 763                 if (view->current_page != page)
 764                         return FALSE;
 765         }
 766
 767         /* Get the size of the page */
 768         ev_page_cache_get_size (view->page_cache, page,
 769                                 view->scale,
 770                                 &width, &height);
 771         compute_border (view, width, height, border);
 772         page_area->width = width + border->left + border->right;
 773         page_area->height = height + border->top + border->bottom;
 774
 775         if (view->presentation) {
 776                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 777                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 778         } else if (view->continuous) {
 779                 gint max_width, max_height;
 780                 gint x, y;
 781
 782                 get_bounding_box_size (view, &max_width, &max_height);
 783                 /* Get the location of the bounding box */
 784                 if (view->dual_page) {
 785                         x = view->spacing + (page % 2) * (max_width + view->spacing);
 786                         y = view->spacing + (page / 2) * (max_height + view->spacing);
 787                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3))/2;
 788                 } else {
 789                         x = view->spacing;
 790                         y = view->spacing + page * (max_height + view->spacing);
 791                         x = x + MAX (0, widget->allocation.width - (max_width + view->spacing * 2))/2;
 792                 }
 793                 page_area->x = x;
 794                 page_area->y = y;
 795         } else {
 796                 gint x, y;
 797                 if (view->dual_page) {
 798                         gint width_2, height_2;
 799                         gint max_width = width;
 800                         gint max_height = height;
 801                         GtkBorder overall_border;
 802                         gint other_page;
 803
 804                         other_page = page ^ 1;
 805
 806                         /* First, we get the bounding box of the two pages */
 807                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
 808                                 ev_page_cache_get_size (view->page_cache,
 809                                                         page + 1,
 810                                                         view->scale,
 811                                                         &width_2, &height_2);
 812                                 if (width_2 > width)
 813                                         max_width = width_2;
 814                                 if (height_2 > height)
 815                                         max_height = height_2;
 816                         }
 817                         compute_border (view, max_width, max_height, &overall_border);
 818
 819                         /* Find the offsets */
 820                         x = view->spacing;
 821                         y = view->spacing;
 822
 823                         /* Adjust for being the left or right page */
 824                         if (page % 2 == 0)
 825                                 x = x + max_width - width;
 826                         else
 827                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 828
 829                         y = y + (max_height - height)/2;
 830
 831                         /* Adjust for extra allocation */
 832                         x = x + MAX (0, widget->allocation.width -
 833                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 834                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 835                 } else {
 836                         x = view->spacing;
 837                         y = view->spacing;
 838
 839                         /* Adjust for extra allocation */
 840                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 841                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 842                 }
 843
 844                 page_area->x = x;
 845                 page_area->y = y;
 846         }
 847
 848         return TRUE;
 849 }
 850
 851 static void
 852 view_rect_to_doc_rect (EvView *view,
 853                        GdkRectangle *view_rect,
 854                        GdkRectangle *page_area,
 855                        EvRectangle  *doc_rect)
 856 {
 857         doc_rect->x1 = floor ((view_rect->x - page_area->x) / view->scale);
 858         doc_rect->y1 = floor ((view_rect->y - page_area->y) / view->scale);
 859         doc_rect->x2 = doc_rect->x1 + ceil (view_rect->width / view->scale);
 860         doc_rect->y2 = doc_rect->y1 + ceil (view_rect->height / view->scale);
 861 }
 862
 863 static void
 864 doc_rect_to_view_rect (EvView       *view,
 865                        int           page,
 866                        EvRectangle  *doc_rect,
 867                        GdkRectangle *view_rect)
 868 {
 869         GdkRectangle page_area;
 870         GtkBorder border;
 871         int width, height;
 872
 873         get_page_extents (view, page, &page_area, &border);
 874
 875         width = doc_rect->x2 - doc_rect->x1;
 876         height = doc_rect->y2 - doc_rect->y1;
 877         view_rect->x = floor (doc_rect->x1 * view->scale) + page_area.x;
 878         view_rect->y = floor (doc_rect->y1 * view->scale) + page_area.y;
 879         view_rect->width = ceil (width * view->scale);
 880         view_rect->height = ceil (height * view->scale);
 881 }
 882
 883 static void
 884 get_bounding_box_size (EvView *view, int *max_width, int *max_height)
 885 {
 886         GtkBorder border;
 887         int width, height;
 888
 889         if (max_width) {
 890                 ev_page_cache_get_max_width_size (view->page_cache,
 891                                                   view->scale,
 892                                                   &width, &height);
 893                 compute_border (view, width, height, &border);
 894                 *max_width = width + border.left + border.right;
 895         }
 896
 897
 898         if (max_height) {
 899                 ev_page_cache_get_max_height_size (view->page_cache,
 900                                                    view->scale,
 901                                                    &width, &height);
 902                 compute_border (view, width, height, &border);
 903                 *max_height = height + border.top + border.bottom;
 904         }
 905 }
 906
 907 static void
 908 find_page_at_location (EvView  *view,
 909                        gdouble  x,
 910                        gdouble  y,
 911                        gint    *page,
 912                        gint    *x_offset,
 913                        gint    *y_offset)
 914 {
 915         int i;
 916
 917         if (view->document == NULL)
 918                 return;
 919
 920         g_assert (page);
 921         g_assert (x_offset);
 922         g_assert (y_offset);
 923
 924         for (i = view->start_page; i <= view->end_page; i++) {
 925                 GdkRectangle page_area;
 926                 GtkBorder border;
 927
 928                 if (! get_page_extents (view, i, &page_area, &border))
 929                         continue;
 930
 931                 if ((x >= page_area.x + border.left) &&
 932                     (x < page_area.x + page_area.width - border.right) &&
 933                     (y >= page_area.y + border.top) &&
 934                     (y < page_area.y + page_area.height - border.bottom)) {
 935                         *page = i;
 936                         *x_offset = x - (page_area.x + border.left);
 937                         *y_offset = y - (page_area.y + border.top);
 938                         return;
 939                 }
 940         }
 941
 942         *page = -1;
 943 }
 944
 945 /*** Hyperref ***/
 946 static EvLink *
 947 get_link_at_location (EvView  *view,
 948                       gdouble  x,
 949                       gdouble  y)
 950 {
 951         gint page = -1;
 952         gint x_offset = 0, y_offset = 0;
 953         GList *link_mapping;
 954
 955         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
 956
 957         if (page == -1)
 958                 return NULL;
 959
 960         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
 961
 962         if (link_mapping)
 963                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
 964         else
 965                 return NULL;
 966 }
 967
 968 /* FIXME: standardize this sometime */
 969 static void
 970 go_to_link (EvView *view, EvLink *link)
 971 {
 972         EvLinkType type;
 973         const char *uri;
 974         int page;
 975
 976         type = ev_link_get_link_type (link);
 977
 978         switch (type) {
 979                 case EV_LINK_TYPE_TITLE:
 980                         break;
 981                 case EV_LINK_TYPE_PAGE:
 982                         page = ev_link_get_page (link);
 983                         ev_page_cache_set_current_page (view->page_cache, page);
 984                         break;
 985                 case EV_LINK_TYPE_EXTERNAL_URI:
 986                         uri = ev_link_get_uri (link);
 987                         gnome_vfs_url_show (uri);
 988                         break;
 989         }
 990 }
 991
 992 static char *
 993 status_message_from_link (EvView *view, EvLink *link)
 994 {
 995         EvLinkType type;
 996         char *msg = NULL;
 997         char *page_label;
 998
 999         type = ev_link_get_link_type (link);
1000
1001         switch (type) {
1002                 case EV_LINK_TYPE_TITLE:
1003                         if (ev_link_get_title (link))
1004                                 msg = g_strdup (ev_link_get_title (link));
1005                         break;
1006                 case EV_LINK_TYPE_PAGE:
1007                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
1008                         msg = g_strdup_printf (_("Go to page %s"), page_label);
1009                         g_free (page_label);
1010                         break;
1011                 case EV_LINK_TYPE_EXTERNAL_URI:
1012                         msg = g_strdup (ev_link_get_uri (link));
1013                         break;
1014                 default:
1015                         break;
1016         }
1017
1018         return msg;
1019 }
1020
1021
1022 /*** GtkWidget implementation ***/
1023
1024 static void
1025 ev_view_size_request_continuous_dual_page (EvView         *view,
1026                                                GtkRequisition *requisition)
1027 {
1028         int max_width, max_height;
1029         int n_rows;
1030
1031         get_bounding_box_size (view, &max_width, &max_height);
1032
1033         n_rows = (1 + ev_page_cache_get_n_pages (view->page_cache)) / 2;
1034
1035         requisition->width = (max_width * 2) + (view->spacing * 3);
1036         requisition->height = max_height * n_rows + (view->spacing * (n_rows + 1));
1037
1038         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1039                 requisition->width = 1;
1040         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1041                 requisition->width = 1;
1042                 /* FIXME: This could actually be set on one page docs or docs
1043                  * with a strange aspect ratio. */
1044                 /* requisition->height = 1;*/
1045         }
1046 }
1047
1048 static void
1049 ev_view_size_request_continuous (EvView         *view,
1050                                  GtkRequisition *requisition)
1051 {
1052         int max_width, max_height;
1053         int n_pages;
1054
1055         get_bounding_box_size (view, &max_width, &max_height);
1056
1057         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1058
1059         requisition->width = max_width + (view->spacing * 2);
1060         requisition->height = max_height * n_pages + (view->spacing * (n_pages + 1));
1061
1062         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1063                 requisition->width = 1;
1064         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1065                 requisition->width = 1;
1066                 /* FIXME: This could actually be set on one page docs or docs
1067                  * with a strange aspect ratio. */
1068                 /* requisition->height = 1;*/
1069         }
1070 }
1071
1072 static void
1073 ev_view_size_request_dual_page (EvView         *view,
1074                                 GtkRequisition *requisition)
1075 {
1076         GtkBorder border;
1077         gint width, height;
1078
1079         /* Find the largest of the two. */
1080         ev_page_cache_get_size (view->page_cache,
1081                                 view->current_page,
1082                                 view->scale,
1083                                 &width, &height);
1084         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1085                 gint width_2, height_2;
1086                 ev_page_cache_get_size (view->page_cache,
1087                                         view->current_page + 1,
1088                                         view->scale,
1089                                         &width_2, &height_2);
1090                 if (width_2 > width) {
1091                         width = width_2;
1092                         height = height_2;
1093                 }
1094         }
1095         compute_border (view, width, height, &border);
1096
1097         requisition->width = ((width + border.left + border.right) * 2) +
1098                 (view->spacing * 3);
1099         requisition->height = (height + border.top + border.bottom) +
1100                 (view->spacing * 2);
1101
1102         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1103                 requisition->width = 1;
1104         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1105                 requisition->width = 1;
1106                 requisition->height = 1;
1107         }
1108 }
1109
1110 static void
1111 ev_view_size_request_single_page (EvView         *view,
1112                                   GtkRequisition *requisition)
1113 {
1114         GtkBorder border;
1115         gint width, height;
1116
1117         ev_page_cache_get_size (view->page_cache,
1118                                 view->current_page,
1119                                 view->scale,
1120                                 &width, &height);
1121         compute_border (view, width, height, &border);
1122
1123         requisition->width = width + border.left + border.right + (2 * view->spacing);
1124         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1125
1126         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1127                 requisition->width = 1;
1128                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1129         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1130                 requisition->width = 1;
1131                 requisition->height = 1;
1132         }
1133 }
1134
1135 static void
1136 ev_view_size_request (GtkWidget      *widget,
1137                       GtkRequisition *requisition)
1138 {
1139         EvView *view = EV_VIEW (widget);
1140
1141         if (view->document == NULL) {
1142                 requisition->width = 1;
1143                 requisition->height = 1;
1144                 return;
1145         }
1146
1147         if (view->presentation) {
1148                 requisition->width = 1;
1149                 requisition->height = 1;
1150                 return;
1151         }
1152
1153         if (view->continuous && view->dual_page)
1154                 ev_view_size_request_continuous_dual_page (view, requisition);
1155         else if (view->continuous)
1156                 ev_view_size_request_continuous (view, requisition);
1157         else if (view->dual_page)
1158                 ev_view_size_request_dual_page (view, requisition);
1159         else
1160                 ev_view_size_request_single_page (view, requisition);
1161 }
1162
1163 static void
1164 ev_view_size_allocate (GtkWidget      *widget,
1165                        GtkAllocation  *allocation)
1166 {
1167         EvView *view = EV_VIEW (widget);
1168
1169         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1170                   view->sizing_mode == EV_SIZING_BEST_FIT) {
1171
1172                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1173
1174                 ev_view_size_request (widget, &widget->requisition);
1175         }
1176
1177         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1178         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1179
1180         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1181         view->pending_resize = FALSE;
1182
1183         if (view->document)
1184                 view_update_range_and_current_page (view);
1185
1186         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1187 }
1188
1189 static void
1190 ev_view_realize (GtkWidget *widget)
1191 {
1192         EvView *view = EV_VIEW (widget);
1193         GdkWindowAttr attributes;
1194
1195         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1196
1197
1198         attributes.window_type = GDK_WINDOW_CHILD;
1199         attributes.wclass = GDK_INPUT_OUTPUT;
1200         attributes.visual = gtk_widget_get_visual (widget);
1201         attributes.colormap = gtk_widget_get_colormap (widget);
1202
1203         attributes.x = widget->allocation.x;
1204         attributes.y = widget->allocation.y;
1205         attributes.width = widget->allocation.width;
1206         attributes.height = widget->allocation.height;
1207         attributes.event_mask = GDK_EXPOSURE_MASK |
1208                                 GDK_BUTTON_PRESS_MASK |
1209                                 GDK_BUTTON_RELEASE_MASK |
1210                                 GDK_SCROLL_MASK |
1211                                 GDK_KEY_PRESS_MASK |
1212                                 GDK_POINTER_MOTION_MASK |
1213                                 GDK_LEAVE_NOTIFY_MASK;
1214
1215         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1216                                          &attributes,
1217                                          GDK_WA_X | GDK_WA_Y |
1218                                          GDK_WA_COLORMAP |
1219                                          GDK_WA_VISUAL);
1220         gdk_window_set_user_data (widget->window, widget);
1221         widget->style = gtk_style_attach (widget->style, widget->window);
1222
1223         if (view->presentation)
1224                 gdk_window_set_background (widget->window, &widget->style->black);
1225         else
1226                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1227 }
1228
1229 static void
1230 ev_view_unrealize (GtkWidget *widget)
1231 {
1232         GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
1233 }
1234
1235 static gboolean
1236 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1237 {
1238         EvView *view = EV_VIEW (widget);
1239
1240         if ((event->state & GDK_CONTROL_MASK) != 0) {
1241
1242                  ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1243
1244                  if (event->direction == GDK_SCROLL_UP ||
1245                         event->direction == GDK_SCROLL_LEFT) {
1246                             if (ev_view_can_zoom_in (view)) {
1247                                     ev_view_zoom_in (view);
1248                             }
1249                  } else {
1250                             if (ev_view_can_zoom_out (view)) {
1251                                     ev_view_zoom_out (view);
1252                             }
1253                  }
1254                  return TRUE;
1255         }
1256
1257         if ((event->state & GDK_SHIFT_MASK) != 0) {
1258                 if (event->direction == GDK_SCROLL_UP)
1259                         event->direction = GDK_SCROLL_LEFT;
1260                 if (event->direction == GDK_SCROLL_DOWN)
1261                         event->direction = GDK_SCROLL_RIGHT;
1262         }
1263
1264         return FALSE;
1265 }
1266
1267 static gboolean
1268 ev_view_expose_event (GtkWidget      *widget,
1269                       GdkEventExpose *event)
1270 {
1271         EvView *view = EV_VIEW (widget);
1272         GdkRectangle rubberband;
1273         GList *l;
1274         int i;
1275
1276         if (view->document == NULL)
1277                 return FALSE;
1278
1279         for (i = view->start_page; i <= view->end_page; i++) {
1280                 GdkRectangle page_area;
1281                 GtkBorder border;
1282
1283                 if (!get_page_extents (view, i, &page_area, &border))
1284                         continue;
1285
1286                 page_area.x -= view->scroll_x;
1287                 page_area.y -= view->scroll_y;
1288
1289                 draw_one_page (view, i, &page_area, &border, &(event->area));
1290
1291                 if (EV_IS_DOCUMENT_FIND (view->document)) {
1292                         highlight_find_results (view, i);
1293                 }
1294         }
1295
1296         for (l = view->selections; l != NULL; l = l->next) {
1297                 EvViewSelection *selection = (EvViewSelection *)l->data;
1298
1299                 doc_rect_to_view_rect (view, selection->page,
1300                                        &selection->rect, &rubberband);
1301                 if (rubberband.width > 0 && rubberband.height > 0) {
1302                         draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
1303                                          &rubberband, 0x40);
1304                 }
1305         }
1306
1307         return FALSE;
1308 }
1309
1310 static gboolean
1311 ev_view_button_press_event (GtkWidget      *widget,
1312                             GdkEventButton *event)
1313 {
1314         EvView *view = EV_VIEW (widget);
1315
1316         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1317                 gtk_widget_grab_focus (widget);
1318         }
1319
1320         view->pressed_button = event->button;
1321
1322         switch (event->button) {
1323                 case 1:
1324                         if (view->selections) {
1325                                 clear_selection (view);
1326                                 gtk_widget_queue_draw (widget);
1327                         }
1328
1329                         view->selection_start.x = event->x;
1330                         view->selection_start.y = event->y;
1331                         return TRUE;
1332                 case 2:
1333                         /* use root coordinates as reference point because
1334                          * scrolling changes window relative coordinates */
1335                         view->drag_info.start.x = event->x_root;
1336                         view->drag_info.start.y = event->y_root;
1337                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1338                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1339
1340                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1341
1342                         return TRUE;
1343         }
1344
1345         return FALSE;
1346 }
1347
1348 static gboolean
1349 ev_view_motion_notify_event (GtkWidget      *widget,
1350                              GdkEventMotion *event)
1351 {
1352         EvView *view = EV_VIEW (widget);
1353
1354         if (view->pressed_button == 1) {
1355                 GdkRectangle selection;
1356
1357                 selection.x = MIN (view->selection_start.x, event->x) + view->scroll_x;
1358                 selection.y = MIN (view->selection_start.y, event->y) + view->scroll_y;
1359                 selection.width = ABS (view->selection_start.x - event->x) + 1;
1360                 selection.height = ABS (view->selection_start.y - event->y) + 1;
1361
1362                 compute_selections (view, &selection);
1363
1364                 gtk_widget_queue_draw (widget);
1365
1366                 return TRUE;
1367         } else if (view->pressed_button == 2) {
1368                 if (!view->drag_info.dragging) {
1369                         gboolean start;
1370
1371                         start = gtk_drag_check_threshold (widget,
1372                                                           view->drag_info.start.x,
1373                                                           view->drag_info.start.y,
1374                                                           event->x_root,
1375                                                           event->y_root);
1376                         view->drag_info.dragging = start;
1377                 }
1378
1379                 if (view->drag_info.dragging) {
1380                         int dx, dy;
1381                         gdouble dhadj_value, dvadj_value;
1382
1383                         dx = event->x_root - view->drag_info.start.x;
1384                         dy = event->y_root - view->drag_info.start.y;
1385
1386                         dhadj_value = view->hadjustment->page_size *
1387                                       (gdouble)dx / widget->allocation.width;
1388                         dvadj_value = view->vadjustment->page_size *
1389                                       (gdouble)dy / widget->allocation.height;
1390
1391                         /* clamp scrolling to visible area */
1392                         gtk_adjustment_set_value (view->hadjustment,
1393                                                   MIN(view->drag_info.hadj - dhadj_value,
1394                                                       view->hadjustment->upper -
1395                                                       view->hadjustment->page_size));
1396                         gtk_adjustment_set_value (view->vadjustment,
1397                                                   MIN(view->drag_info.vadj - dvadj_value,
1398                                                       view->vadjustment->upper -
1399                                                       view->vadjustment->page_size));
1400
1401                         return TRUE;
1402                 }
1403         } else if (view->pressed_button <= 0 && view->document) {
1404                 EvLink *link;
1405
1406                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1407                 if (link) {
1408                         char *msg;
1409
1410                         msg = status_message_from_link (view, link);
1411                         ev_view_set_status (view, msg);
1412                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1413                         g_free (msg);
1414                 } else {
1415                         ev_view_set_status (view, NULL);
1416                         if (view->cursor == EV_VIEW_CURSOR_LINK) {
1417                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1418                         }
1419                 }
1420                 return TRUE;
1421         }
1422
1423         return FALSE;
1424 }
1425
1426 static gboolean
1427 ev_view_button_release_event (GtkWidget      *widget,
1428                               GdkEventButton *event)
1429 {
1430         EvView *view = EV_VIEW (widget);
1431
1432         if (view->pressed_button == 2) {
1433                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1434         }
1435
1436         view->pressed_button = -1;
1437         view->drag_info.dragging = FALSE;
1438
1439         if (view->selections) {
1440                 ev_view_update_primary_selection (view);
1441         } else if (view->document) {
1442                 EvLink *link;
1443
1444                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1445                 if (link) {
1446                         go_to_link (view, link);
1447                 }
1448         }
1449
1450         return FALSE;
1451 }
1452
1453 /*** Drawing ***/
1454
1455 static guint32
1456 ev_gdk_color_to_rgb (const GdkColor *color)
1457 {
1458   guint32 result;
1459   result = (0xff0000 | (color->red & 0xff00));
1460   result <<= 8;
1461   result |= ((color->green & 0xff00) | (color->blue >> 8));
1462   return result;
1463 }
1464
1465 static void
1466 draw_rubberband (GtkWidget *widget, GdkWindow *window,
1467                  const GdkRectangle *rect, guchar alpha)
1468 {
1469         GdkGC *gc;
1470         GdkPixbuf *pixbuf;
1471         GdkColor *fill_color_gdk;
1472         guint fill_color;
1473
1474         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
1475         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
1476
1477         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
1478                                  rect->width, rect->height);
1479         gdk_pixbuf_fill (pixbuf, fill_color);
1480
1481         gdk_draw_pixbuf (window, NULL, pixbuf,
1482                          0, 0,
1483                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1484                          rect->width, rect->height,
1485                          GDK_RGB_DITHER_NONE,
1486                          0, 0);
1487
1488         g_object_unref (pixbuf);
1489
1490         gc = gdk_gc_new (window);
1491         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
1492         gdk_draw_rectangle (window, gc, FALSE,
1493                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1494                             rect->width - 1,
1495                             rect->height - 1);
1496         g_object_unref (gc);
1497
1498         gdk_color_free (fill_color_gdk);
1499 }
1500
1501
1502 static void
1503 highlight_find_results (EvView *view, int page)
1504 {
1505         EvDocumentFind *find;
1506         int i, results = 0;
1507
1508         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
1509
1510         find = EV_DOCUMENT_FIND (view->document);
1511
1512         results = ev_document_find_get_n_results (find, page);
1513
1514         for (i = 0; i < results; i++) {
1515                 EvRectangle rectangle;
1516                 GdkRectangle view_rectangle;
1517                 guchar alpha;
1518
1519                 if (i == view->find_result && page == view->find_page) {
1520                         alpha = 0x90;
1521                 } else {
1522                         alpha = 0x20;
1523                 }
1524
1525                 ev_document_find_get_result (find, page,
1526                                              i, &rectangle);
1527                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
1528                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
1529                                  &view_rectangle, alpha);
1530         }
1531 }
1532
1533 static void
1534 draw_one_page (EvView       *view,
1535                gint          page,
1536                GdkRectangle *page_area,
1537                GtkBorder    *border,
1538                GdkRectangle *expose_area)
1539 {
1540         gint width, height;
1541         GdkPixbuf *scaled_image;
1542         GdkPixbuf *current_pixbuf;
1543         GdkRectangle overlap;
1544         GdkRectangle real_page_area;
1545
1546         g_assert (view->document);
1547         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
1548                 return;
1549
1550         ev_page_cache_get_size (view->page_cache,
1551                                 page, view->scale,
1552                                 &width, &height);
1553         /* Render the document itself */
1554         real_page_area = *page_area;
1555
1556         real_page_area.x += border->left;
1557         real_page_area.y += border->top;
1558         real_page_area.width -= (border->left + border->right);
1559         real_page_area.height -= (border->top + border->bottom);
1560
1561         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
1562                                          GTK_WIDGET (view),
1563                                          page_area, border);
1564
1565         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
1566                 current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
1567
1568                 if (current_pixbuf == NULL)
1569                         scaled_image = NULL;
1570                 else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
1571                          height == gdk_pixbuf_get_height (current_pixbuf))
1572                         scaled_image = g_object_ref (current_pixbuf);
1573                 else
1574                         /* FIXME: We don't want to scale the whole area, just the right
1575                          * area of it */
1576                         scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
1577                                                                 width, height,
1578                                                                 GDK_INTERP_NEAREST);
1579
1580                 if (scaled_image) {
1581                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
1582                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
1583                                          scaled_image,
1584                                          overlap.x - real_page_area.x,
1585                                          overlap.y - real_page_area.y,
1586                                          overlap.x, overlap.y,
1587                                          overlap.width, overlap.height,
1588                                          GDK_RGB_DITHER_NORMAL,
1589                                          0, 0);
1590                         g_object_unref (scaled_image);
1591                 }
1592         }
1593 }
1594
1595 /*** GObject functions ***/
1596
1597 static void
1598 ev_view_finalize (GObject *object)
1599 {
1600         EvView *view = EV_VIEW (object);
1601
1602         LOG ("Finalize");
1603
1604         g_free (view->status);
1605         g_free (view->find_status);
1606
1607         clear_selection (view);
1608
1609         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
1610 }
1611
1612 static void
1613 ev_view_destroy (GtkObject *object)
1614 {
1615         EvView *view = EV_VIEW (object);
1616
1617         if (view->document) {
1618                 g_object_unref (view->document);
1619                 view->document = NULL;
1620         }
1621         if (view->pixbuf_cache) {
1622                 g_object_unref (view->pixbuf_cache);
1623                 view->pixbuf_cache = NULL;
1624         }
1625         ev_view_set_scroll_adjustments (view, NULL, NULL);
1626
1627         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
1628 }
1629
1630 static void
1631 ev_view_set_property (GObject      *object,
1632                       guint         prop_id,
1633                       const GValue *value,
1634                       GParamSpec   *pspec)
1635 {
1636         EvView *view = EV_VIEW (object);
1637
1638         switch (prop_id)
1639         {
1640         case PROP_CONTINUOUS:
1641                 ev_view_set_continuous (view, g_value_get_boolean (value));
1642                 break;
1643         case PROP_DUAL_PAGE:
1644                 ev_view_set_dual_page (view, g_value_get_boolean (value));
1645                 break;
1646         case PROP_FULLSCREEN:
1647                 ev_view_set_fullscreen (view, g_value_get_boolean (value));
1648                 break;
1649         case PROP_PRESENTATION:
1650                 ev_view_set_presentation (view, g_value_get_boolean (value));
1651                 break;
1652         case PROP_SIZING_MODE:
1653                 ev_view_set_sizing_mode (view, g_value_get_enum (value));
1654                 break;
1655         case PROP_ZOOM:
1656                 ev_view_set_zoom (view, g_value_get_double (value), FALSE);
1657                 break;
1658         default:
1659                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1660         }
1661 }
1662
1663 static void
1664 ev_view_get_property (GObject *object,
1665                       guint prop_id,
1666                       GValue *value,
1667                       GParamSpec *pspec)
1668 {
1669         EvView *view = EV_VIEW (object);
1670
1671         switch (prop_id)
1672         {
1673         case PROP_STATUS:
1674                 g_value_set_string (value, view->status);
1675                 break;
1676         case PROP_FIND_STATUS:
1677                 g_value_set_string (value, view->status);
1678                 break;
1679         case PROP_CONTINUOUS:
1680                 g_value_set_boolean (value, view->continuous);
1681                 break;
1682         case PROP_DUAL_PAGE:
1683                 g_value_set_boolean (value, view->dual_page);
1684                 break;
1685         case PROP_FULLSCREEN:
1686                 g_value_set_boolean (value, view->fullscreen);
1687                 break;
1688         case PROP_PRESENTATION:
1689                 g_value_set_boolean (value, view->presentation);
1690                 break;
1691         case PROP_SIZING_MODE:
1692                 g_value_set_enum (value, view->sizing_mode);
1693                 break;
1694         case PROP_ZOOM:
1695                 g_value_set_double (value, view->scale);
1696                 break;
1697         default:
1698                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1699         }
1700 }
1701
1702 static void
1703 ev_view_class_init (EvViewClass *class)
1704 {
1705         GObjectClass *object_class = G_OBJECT_CLASS (class);
1706         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
1707         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
1708         GtkBindingSet *binding_set;
1709
1710         object_class->finalize = ev_view_finalize;
1711         object_class->set_property = ev_view_set_property;
1712         object_class->get_property = ev_view_get_property;
1713
1714         widget_class->expose_event = ev_view_expose_event;
1715         widget_class->button_press_event = ev_view_button_press_event;
1716         widget_class->motion_notify_event = ev_view_motion_notify_event;
1717         widget_class->button_release_event = ev_view_button_release_event;
1718         widget_class->size_request = ev_view_size_request;
1719         widget_class->size_allocate = ev_view_size_allocate;
1720         widget_class->realize = ev_view_realize;
1721         widget_class->unrealize = ev_view_unrealize;
1722         widget_class->scroll_event = ev_view_scroll_event;
1723         gtk_object_class->destroy = ev_view_destroy;
1724
1725         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
1726         class->scroll_view = ev_view_scroll_view;
1727
1728         widget_class->set_scroll_adjustments_signal =
1729             g_signal_new ("set-scroll-adjustments",
1730                           G_OBJECT_CLASS_TYPE (object_class),
1731                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1732                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
1733                           NULL, NULL,
1734                           ev_marshal_VOID__OBJECT_OBJECT,
1735                           G_TYPE_NONE, 2,
1736                           GTK_TYPE_ADJUSTMENT,
1737                           GTK_TYPE_ADJUSTMENT);
1738
1739         signals[SIGNAL_SCROLL_VIEW] = g_signal_new ("scroll-view",
1740                          G_TYPE_FROM_CLASS (object_class),
1741                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1742                          G_STRUCT_OFFSET (EvViewClass, scroll_view),
1743                          NULL, NULL,
1744                          ev_marshal_VOID__ENUM_BOOLEAN,
1745                          G_TYPE_NONE, 2,
1746                          GTK_TYPE_SCROLL_TYPE,
1747                          G_TYPE_BOOLEAN);
1748
1749         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
1750                          G_TYPE_FROM_CLASS (object_class),
1751                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1752                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
1753                          NULL, NULL,
1754                          ev_marshal_VOID__VOID,
1755                          G_TYPE_NONE, 0, G_TYPE_NONE);
1756
1757         g_object_class_install_property (object_class,
1758                                          PROP_STATUS,
1759                                          g_param_spec_string ("status",
1760                                                               "Status Message",
1761                                                               "The status message",
1762                                                               NULL,
1763                                                               G_PARAM_READABLE));
1764
1765         g_object_class_install_property (object_class,
1766                                          PROP_FIND_STATUS,
1767                                          g_param_spec_string ("find-status",
1768                                                               "Find Status Message",
1769                                                               "The find status message",
1770                                                               NULL,
1771                                                               G_PARAM_READABLE));
1772
1773         g_object_class_install_property (object_class,
1774                                          PROP_CONTINUOUS,
1775                                          g_param_spec_boolean ("continuous",
1776                                                                "Continuous",
1777                                                                "Continuous scrolling mode",
1778                                                                TRUE,
1779                                                                G_PARAM_READWRITE));
1780
1781         g_object_class_install_property (object_class,
1782                                          PROP_DUAL_PAGE,
1783                                          g_param_spec_boolean ("dual-page",
1784                                                                "Dual Page",
1785                                                                "Two pages visible at once",
1786                                                                FALSE,
1787                                                                G_PARAM_READWRITE));
1788         g_object_class_install_property (object_class,
1789                                          PROP_FULLSCREEN,
1790                                          g_param_spec_boolean ("fullscreen",
1791                                                                "Full Screen",
1792                                                                "Draw page in a fullscreen fashion",
1793                                                                FALSE,
1794                                                                G_PARAM_READWRITE));
1795         g_object_class_install_property (object_class,
1796                                          PROP_PRESENTATION,
1797                                          g_param_spec_boolean ("presentation",
1798                                                                "Presentation",
1799                                                                "Draw page in presentation mode",
1800                                                                TRUE,
1801                                                                G_PARAM_READWRITE));
1802
1803         g_object_class_install_property (object_class,
1804                                          PROP_SIZING_MODE,
1805                                          g_param_spec_enum ("sizing-mode",
1806                                                             "Sizing Mode",
1807                                                             "Sizing Mode",
1808                                                             EV_TYPE_SIZING_MODE,
1809                                                             EV_SIZING_FIT_WIDTH,
1810                                                             G_PARAM_READWRITE));
1811
1812         g_object_class_install_property (object_class,
1813                                          PROP_ZOOM,
1814                                          g_param_spec_double ("zoom",
1815                                                               "Zoom factor",
1816                                                                "Zoom factor",
1817                                                                MIN_SCALE,
1818                                                                MAX_SCALE,
1819                                                                1.0,
1820                                                                G_PARAM_READWRITE));
1821
1822         binding_set = gtk_binding_set_by_class (class);
1823
1824         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
1825         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
1826         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
1827         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
1828 }
1829
1830 static void
1831 ev_view_init (EvView *view)
1832 {
1833         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
1834
1835         view->spacing = 5;
1836         view->scale = 1.0;
1837         view->current_page = 0;
1838         view->pressed_button = -1;
1839         view->cursor = EV_VIEW_CURSOR_NORMAL;
1840         view->drag_info.dragging = FALSE;
1841
1842         view->continuous = TRUE;
1843         view->dual_page = FALSE;
1844         view->presentation = FALSE;
1845         view->fullscreen = FALSE;
1846         view->sizing_mode = EV_SIZING_FIT_WIDTH;
1847         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1848 }
1849
1850 /*** Callbacks ***/
1851
1852 static void
1853 find_changed_cb (EvDocument *document, int page, EvView *view)
1854 {
1855         jump_to_find_page (view);
1856         jump_to_find_result (view);
1857         update_find_status_message (view);
1858
1859         if (view->current_page == page)
1860                 gtk_widget_queue_draw (GTK_WIDGET (view));
1861 }
1862
1863 static void
1864 job_finished_cb (EvPixbufCache *pixbuf_cache,
1865                  EvView        *view)
1866 {
1867         gtk_widget_queue_draw (GTK_WIDGET (view));
1868 }
1869
1870 static void
1871 page_changed_cb (EvPageCache *page_cache,
1872                  int          new_page,
1873                  EvView      *view)
1874 {
1875         if (view->current_page != new_page) {
1876
1877                 view->current_page = new_page;
1878                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
1879                 gtk_widget_queue_resize (GTK_WIDGET (view));
1880
1881                 if (EV_IS_DOCUMENT_FIND (view->document)) {
1882                         view->find_page = new_page;
1883                         view->find_result = 0;
1884                         update_find_status_message (view);
1885                 }
1886         }
1887 }
1888
1889 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
1890                                          EvView *view)
1891 {
1892         int dx = 0, dy = 0;
1893
1894         if (! GTK_WIDGET_REALIZED (view))
1895                 return;
1896
1897         if (view->hadjustment) {
1898                 dx = view->scroll_x - (int) view->hadjustment->value;
1899                 view->scroll_x = (int) view->hadjustment->value;
1900         } else {
1901                 view->scroll_x = 0;
1902         }
1903
1904         if (view->vadjustment) {
1905                 dy = view->scroll_y - (int) view->vadjustment->value;
1906                 view->scroll_y = (int) view->vadjustment->value;
1907         } else {
1908                 view->scroll_y = 0;
1909         }
1910
1911
1912         if (view->pending_resize)
1913                 gtk_widget_queue_draw (GTK_WIDGET (view));
1914         else
1915                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
1916
1917
1918         if (view->document)
1919                 view_update_range_and_current_page (view);}
1920
1921 GtkWidget*
1922 ev_view_new (void)
1923 {
1924         GtkWidget *view;
1925
1926         view = g_object_new (EV_TYPE_VIEW, NULL);
1927
1928         return view;
1929 }
1930
1931 void
1932 ev_view_set_document (EvView     *view,
1933                       EvDocument *document)
1934 {
1935         g_return_if_fail (EV_IS_VIEW (view));
1936
1937         if (document != view->document) {
1938                 if (view->document) {
1939                         g_signal_handlers_disconnect_by_func (view->document,
1940                                                               find_changed_cb,
1941                                                               view);
1942                         g_object_unref (view->document);
1943                         view->page_cache = NULL;
1944
1945                 }
1946
1947                 if (view->pixbuf_cache) {
1948                         g_object_unref (view->pixbuf_cache);
1949                         view->pixbuf_cache = NULL;
1950                 }
1951
1952                 view->document = document;
1953                 view->find_page = 0;
1954                 view->find_result = 0;
1955
1956                 if (view->document) {
1957                         g_object_ref (view->document);
1958                         if (EV_IS_DOCUMENT_FIND (view->document)) {
1959                                 g_signal_connect (view->document,
1960                                                   "find_changed",
1961                                                   G_CALLBACK (find_changed_cb),
1962                                                   view);
1963                         }
1964                         view->page_cache = ev_document_get_page_cache (view->document);
1965                         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
1966                         view->pixbuf_cache = ev_pixbuf_cache_new (view->document);
1967                         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
1968                 }
1969
1970                 gtk_widget_queue_resize (GTK_WIDGET (view));
1971         }
1972 }
1973
1974 /*** Zoom and sizing mode ***/
1975
1976 #define EPSILON 0.0000001
1977 void
1978 ev_view_set_zoom (EvView   *view,
1979                   double    factor,
1980                   gboolean  relative)
1981 {
1982         double scale;
1983
1984         if (relative)
1985                 scale = view->scale * factor;
1986         else
1987                 scale = factor;
1988
1989         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
1990
1991         if (ABS (view->scale - scale) < EPSILON)
1992                 return;
1993
1994         view->scale = scale;
1995         view->pending_resize = TRUE;
1996
1997         gtk_widget_queue_resize (GTK_WIDGET (view));
1998
1999         g_object_notify (G_OBJECT (view), "zoom");
2000 }
2001
2002 double
2003 ev_view_get_zoom (EvView *view)
2004 {
2005         return view->scale;
2006 }
2007
2008 void
2009 ev_view_set_continuous (EvView   *view,
2010                         gboolean  continuous)
2011 {
2012         g_return_if_fail (EV_IS_VIEW (view));
2013
2014         continuous = continuous != FALSE;
2015
2016         if (view->continuous != continuous) {
2017                 view->continuous = continuous;
2018                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2019                 gtk_widget_queue_resize (GTK_WIDGET (view));
2020         }
2021
2022         g_object_notify (G_OBJECT (view), "continuous");
2023 }
2024
2025 void
2026 ev_view_set_dual_page (EvView   *view,
2027                        gboolean  dual_page)
2028 {
2029         g_return_if_fail (EV_IS_VIEW (view));
2030
2031         dual_page = dual_page != FALSE;
2032
2033         if (view->dual_page == dual_page)
2034                 return;
2035
2036         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2037         view->dual_page = dual_page;
2038         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2039          * preload_cache_size to be 2 if dual_page is set.
2040          */
2041         gtk_widget_queue_resize (GTK_WIDGET (view));
2042
2043         g_object_notify (G_OBJECT (view), "dual-page");
2044 }
2045
2046 void
2047 ev_view_set_fullscreen (EvView   *view,
2048                          gboolean  fullscreen)
2049 {
2050         g_return_if_fail (EV_IS_VIEW (view));
2051
2052         fullscreen = fullscreen != FALSE;
2053
2054         if (view->fullscreen != fullscreen) {
2055                 view->fullscreen = fullscreen;
2056                 gtk_widget_queue_resize (GTK_WIDGET (view));
2057         }
2058
2059         g_object_notify (G_OBJECT (view), "fullscreen");
2060 }
2061
2062 gboolean
2063 ev_view_get_fullscreen (EvView *view)
2064 {
2065         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2066
2067         return view->fullscreen;
2068 }
2069
2070 void
2071 ev_view_set_presentation (EvView   *view,
2072                           gboolean  presentation)
2073 {
2074         g_return_if_fail (EV_IS_VIEW (view));
2075
2076         presentation = presentation != FALSE;
2077
2078         if (view->presentation == presentation)
2079                 return;
2080
2081         view->presentation = presentation;
2082         gtk_widget_queue_resize (GTK_WIDGET (view));
2083         if (GTK_WIDGET_REALIZED (view)) {
2084                 if (view->presentation)
2085                         gdk_window_set_background (GTK_WIDGET(view)->window,
2086                                                    &GTK_WIDGET (view)->style->black);
2087                 else
2088                         gdk_window_set_background (GTK_WIDGET(view)->window,
2089                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
2090         }
2091
2092
2093         g_object_notify (G_OBJECT (view), "presentation");
2094 }
2095
2096 gboolean
2097 ev_view_get_presentation (EvView *view)
2098 {
2099         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2100
2101         return view->presentation;
2102 }
2103
2104 void
2105 ev_view_set_sizing_mode (EvView       *view,
2106                          EvSizingMode  sizing_mode)
2107 {
2108         g_return_if_fail (EV_IS_VIEW (view));
2109
2110         if (view->sizing_mode == sizing_mode)
2111                 return;
2112
2113         view->sizing_mode = sizing_mode;
2114         gtk_widget_queue_resize (GTK_WIDGET (view));
2115
2116         g_object_notify (G_OBJECT (view), "sizing-mode");
2117 }
2118
2119 EvSizingMode
2120 ev_view_get_sizing_mode (EvView *view)
2121 {
2122         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
2123
2124         return view->sizing_mode;
2125 }
2126
2127 gboolean
2128 ev_view_can_zoom_in (EvView *view)
2129 {
2130         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
2131 }
2132
2133 gboolean
2134 ev_view_can_zoom_out (EvView *view)
2135 {
2136         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
2137 }
2138
2139 void
2140 ev_view_zoom_in (EvView *view)
2141 {
2142         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2143
2144         view->pending_scroll = SCROLL_TO_CENTER;
2145         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
2146 }
2147
2148 void
2149 ev_view_zoom_out (EvView *view)
2150 {
2151         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2152
2153         view->pending_scroll = SCROLL_TO_CENTER;
2154         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
2155 }
2156
2157 static double
2158 zoom_for_size_fit_width (int doc_width,
2159                          int doc_height,
2160                          int target_width,
2161                          int target_height,
2162                          int vsb_width)
2163 {
2164         double scale;
2165
2166         scale = (double)target_width / doc_width;
2167
2168         if (doc_height * scale > target_height)
2169                 scale = (double) (target_width - vsb_width) / doc_width;
2170
2171         return scale;
2172 }
2173
2174 static double
2175 zoom_for_size_best_fit (int doc_width,
2176                         int doc_height,
2177                         int target_width,
2178                         int target_height,
2179                         int vsb_width,
2180                         int hsb_width)
2181 {
2182         double w_scale;
2183         double h_scale;
2184
2185         w_scale = (double)target_width / doc_width;
2186         h_scale = (double)target_height / doc_height;
2187
2188         if (doc_height * w_scale > target_height)
2189                 w_scale = (double) (target_width - vsb_width) / doc_width;
2190         if (doc_width * h_scale > target_width)
2191                 h_scale = (double) (target_height - hsb_width) / doc_height;
2192
2193         return MIN (w_scale, h_scale);
2194 }
2195
2196
2197 static void
2198 ev_view_zoom_for_size_presentation (EvView *view,
2199                                     int     width,
2200                                     int     height)
2201 {
2202         int doc_width, doc_height;
2203         gdouble scale;
2204
2205         ev_page_cache_get_size (view->page_cache,
2206                                 view->current_page,
2207                                 1.0,
2208                                 &doc_width,
2209                                 &doc_height);
2210         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
2211         ev_view_set_zoom (view, scale, FALSE);
2212 }
2213
2214 static void
2215 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
2216                            int     width,
2217                            int     height,
2218                            int     vsb_width,
2219                            int     hsb_height)
2220 {
2221         int doc_width, doc_height;
2222         GtkBorder border;
2223         gdouble scale;
2224
2225         ev_page_cache_get_max_width_size (view->page_cache,
2226                                           1.0,
2227                                           &doc_width, NULL);
2228         ev_page_cache_get_max_height_size (view->page_cache,
2229                                            1.0,
2230                                            NULL, &doc_height);
2231         compute_border (view, doc_width, doc_height, &border);
2232
2233         doc_width = doc_width * 2;
2234         width -= (2 * (border.left + border.right) + 3 * view->spacing);
2235         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2236
2237         /* FIXME: We really need to calculate the overall height here, not the
2238          * page height.  We assume there's always a vertical scrollbar for
2239          * now.  We need to fix this. */
2240         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2241                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2242         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2243                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2244         else
2245                 g_assert_not_reached ();
2246
2247         ev_view_set_zoom (view, scale, FALSE);
2248 }
2249
2250 static void
2251 ev_view_zoom_for_size_continuous (EvView *view,
2252                                   int     width,
2253                                   int     height,
2254                                   int     vsb_width,
2255                                   int     hsb_height)
2256 {
2257         int doc_width, doc_height;
2258         GtkBorder border;
2259         gdouble scale;
2260
2261         ev_page_cache_get_max_width_size (view->page_cache,
2262                                           1.0,
2263                                           &doc_width, NULL);
2264         ev_page_cache_get_max_height_size (view->page_cache,
2265                                            1.0,
2266                                            NULL, &doc_height);
2267         compute_border (view, doc_width, doc_height, &border);
2268
2269         width -= (border.left + border.right + 2 * view->spacing);
2270         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2271
2272         /* FIXME: We really need to calculate the overall height here, not the
2273          * page height.  We assume there's always a vertical scrollbar for
2274          * now.  We need to fix this. */
2275         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2276                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2277         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2278                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2279         else
2280                 g_assert_not_reached ();
2281
2282         ev_view_set_zoom (view, scale, FALSE);
2283 }
2284
2285 static void
2286 ev_view_zoom_for_size_dual_page (EvView *view,
2287                                  int     width,
2288                                  int     height,
2289                                  int     vsb_width,
2290                                  int     hsb_height)
2291 {
2292         GtkBorder border;
2293         gint doc_width, doc_height;
2294         gdouble scale;
2295         gint other_page;
2296
2297         other_page = view->current_page ^ 1;
2298
2299         /* Find the largest of the two. */
2300         ev_page_cache_get_size (view->page_cache,
2301                                 view->current_page,
2302                                 1.0,
2303                                 &doc_width, &doc_height);
2304
2305         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
2306                 gint width_2, height_2;
2307                 ev_page_cache_get_size (view->page_cache,
2308                                         other_page,
2309                                         1.0,
2310                                         &width_2, &height_2);
2311                 if (width_2 > doc_width)
2312                         doc_width = width_2;
2313                 if (height_2 > doc_height)
2314                         doc_height = height_2;
2315         }
2316         compute_border (view, doc_width, doc_height, &border);
2317
2318         doc_width = doc_width * 2;
2319         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
2320         height -= (border.top + border.bottom + 2 * view->spacing);
2321
2322         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2323                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2324         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2325                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2326         else
2327                 g_assert_not_reached ();
2328
2329         ev_view_set_zoom (view, scale, FALSE);
2330 }
2331
2332 static void
2333 ev_view_zoom_for_size_single_page (EvView *view,
2334                                    int     width,
2335                                    int     height,
2336                                    int     vsb_width,
2337                                    int     hsb_height)
2338 {
2339         int doc_width, doc_height;
2340         GtkBorder border;
2341         gdouble scale;
2342
2343         ev_page_cache_get_size (view->page_cache,
2344                                 view->current_page,
2345                                 1.0,
2346                                 &doc_width,
2347                                 &doc_height);
2348         /* Get an approximate border */
2349         compute_border (view, width, height, &border);
2350
2351         width -= (border.left + border.right + 2 * view->spacing);
2352         height -= (border.top + border.bottom + 2 * view->spacing);
2353
2354         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2355                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2356         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2357                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2358         else
2359                 g_assert_not_reached ();
2360
2361         ev_view_set_zoom (view, scale, FALSE);
2362 }
2363
2364 void
2365 ev_view_set_zoom_for_size (EvView *view,
2366                            int     width,
2367                            int     height,
2368                            int     vsb_width,
2369                            int     hsb_height)
2370 {
2371         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2372                           view->sizing_mode == EV_SIZING_BEST_FIT);
2373         g_return_if_fail (width >= 0);
2374         g_return_if_fail (height >= 0);
2375
2376         if (view->document == NULL)
2377                 return;
2378
2379         if (view->presentation)
2380                 ev_view_zoom_for_size_presentation (view, width, height);
2381         else if (view->continuous && view->dual_page)
2382                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
2383         else if (view->continuous)
2384                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
2385         else if (view->dual_page)
2386                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
2387         else
2388                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
2389 }
2390
2391 /*** Status text messages ***/
2392
2393 const char *
2394 ev_view_get_status (EvView *view)
2395 {
2396         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2397
2398         return view->status;
2399 }
2400
2401 static void
2402 ev_view_set_status (EvView *view, const char *message)
2403 {
2404         g_return_if_fail (EV_IS_VIEW (view));
2405
2406         if (message != view->status) {
2407                 g_free (view->status);
2408                 view->status = g_strdup (message);
2409                 g_object_notify (G_OBJECT (view), "status");
2410         }
2411 }
2412
2413 static void
2414 update_find_status_message (EvView *view)
2415 {
2416         char *message;
2417
2418         if (view->current_page == view->find_page) {
2419                 int results;
2420
2421                 results = ev_document_find_get_n_results
2422                                 (EV_DOCUMENT_FIND (view->document),
2423                                  view->current_page);
2424                 /* TRANS: Sometimes this could be better translated as
2425                    "%d hit(s) on this page".  Therefore this string
2426                    contains plural cases. */
2427                 message = g_strdup_printf (ngettext ("%d found on this page",
2428                                                      "%d found on this page",
2429                                                      results),
2430                                            results);
2431         } else {
2432                 double percent;
2433
2434                 percent = ev_document_find_get_progress
2435                                 (EV_DOCUMENT_FIND (view->document));
2436                 if (percent >= (1.0 - 1e-10)) {
2437                         message = g_strdup (_("Not found"));
2438                 } else {
2439                         message = g_strdup_printf (_("%3d%% remaining to search"),
2440                                                    (int) ((1.0 - percent) * 100));
2441                 }
2442
2443         }
2444         ev_view_set_find_status (view, message);
2445 }
2446
2447 const char *
2448 ev_view_get_find_status (EvView *view)
2449 {
2450         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2451
2452         return view->find_status;
2453 }
2454
2455 static void
2456 ev_view_set_find_status (EvView *view, const char *message)
2457 {
2458         g_return_if_fail (EV_IS_VIEW (view));
2459
2460         g_free (view->find_status);
2461         view->find_status = g_strdup (message);
2462         g_object_notify (G_OBJECT (view), "find-status");
2463 }
2464
2465 /*** Find ***/
2466
2467 static void
2468 jump_to_find_result (EvView *view)
2469 {
2470         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2471         EvRectangle rect;
2472         GdkRectangle view_rect;
2473         int n_results;
2474         int page = view->find_page;
2475
2476         n_results = ev_document_find_get_n_results (find, page);
2477
2478         if (n_results > view->find_result) {
2479                 ev_document_find_get_result
2480                         (find, page, view->find_result, &rect);
2481
2482                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
2483                 ensure_rectangle_is_visible (view, &view_rect);
2484         }
2485 }
2486
2487 static void
2488 jump_to_find_page (EvView *view)
2489 {
2490         int n_pages, i;
2491
2492         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2493
2494         for (i = 0; i < n_pages; i++) {
2495                 int has_results;
2496                 int page;
2497
2498                 page = i + view->find_page;
2499                 if (page >= n_pages) {
2500                         page = page - n_pages;
2501                 }
2502
2503                 has_results = ev_document_find_page_has_results
2504                                 (EV_DOCUMENT_FIND (view->document), page);
2505                 if (has_results == -1) {
2506                         view->find_page = page;
2507                         break;
2508                 } else if (has_results == 1) {
2509                         ev_page_cache_set_current_page (view->page_cache, page);
2510                         jump_to_find_result (view);
2511                         break;
2512                 }
2513         }
2514 }
2515
2516 gboolean
2517 ev_view_can_find_next (EvView *view)
2518 {
2519         int n_results = 0;
2520
2521         if (EV_IS_DOCUMENT_FIND (view->document)) {
2522                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2523
2524                 n_results = ev_document_find_get_n_results (find, view->current_page);
2525         }
2526
2527         return n_results > 0;
2528 }
2529
2530 void
2531 ev_view_find_next (EvView *view)
2532 {
2533         EvPageCache *page_cache;
2534         int n_results, n_pages;
2535         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2536
2537         page_cache = ev_document_get_page_cache (view->document);
2538         n_results = ev_document_find_get_n_results (find, view->current_page);
2539
2540         n_pages = ev_page_cache_get_n_pages (page_cache);
2541
2542         view->find_result++;
2543
2544         if (view->find_result >= n_results) {
2545                 view->find_result = 0;
2546                 view->find_page++;
2547
2548                 if (view->find_page >= n_pages) {
2549                         view->find_page = 0;
2550                 }
2551
2552                 jump_to_find_page (view);
2553         } else {
2554                 jump_to_find_result (view);
2555                 gtk_widget_queue_draw (GTK_WIDGET (view));
2556         }
2557 }
2558
2559 void
2560 ev_view_find_previous (EvView *view)
2561 {
2562         int n_results, n_pages;
2563         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2564         EvPageCache *page_cache;
2565
2566         page_cache = ev_document_get_page_cache (view->document);
2567
2568         n_results = ev_document_find_get_n_results (find, view->current_page);
2569
2570         n_pages = ev_page_cache_get_n_pages (page_cache);
2571
2572         view->find_result--;
2573
2574         if (view->find_result < 0) {
2575                 view->find_result = 0;
2576                 view->find_page--;
2577
2578                 if (view->find_page < 0) {
2579                         view->find_page = n_pages - 1;
2580                 }
2581
2582                 jump_to_find_page (view);
2583         } else {
2584                 jump_to_find_result (view);
2585                 gtk_widget_queue_draw (GTK_WIDGET (view));
2586         }
2587 }
2588
2589 /*** Selections ***/
2590
2591 static void
2592 compute_selections (EvView *view, GdkRectangle *view_rect)
2593 {
2594         int n_pages, i;
2595
2596         clear_selection (view);
2597
2598         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2599         for (i = 0; i < n_pages; i++) {
2600                 GdkRectangle page_area;
2601                 GtkBorder border;
2602
2603                 if (get_page_extents (view, i, &page_area, &border)) {
2604                         GdkRectangle overlap;
2605
2606                         if (gdk_rectangle_intersect (&page_area, view_rect, &overlap)) {
2607                                 EvViewSelection *selection;
2608
2609                                 selection = g_new0 (EvViewSelection, 1);
2610                                 selection->page = i;
2611                                 view_rect_to_doc_rect (view, &overlap, &page_area,
2612                                                        &(selection->rect));
2613
2614                                 view->selections = g_list_append
2615                                                 (view->selections, selection);
2616                         }
2617                 }
2618         }
2619 }
2620
2621 static void
2622 clear_selection (EvView *view)
2623 {
2624         g_list_foreach (view->selections, (GFunc)g_free, NULL);
2625         view->selections = NULL;
2626 }
2627
2628
2629 void
2630 ev_view_select_all (EvView *view)
2631 {
2632         int n_pages, i;
2633
2634         clear_selection (view);
2635
2636         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2637         for (i = 0; i < n_pages; i++) {
2638                 int width, height;
2639                 EvViewSelection *selection;
2640
2641                 ev_page_cache_get_size (view->page_cache,
2642                                         i, 1.0, &width, &height);
2643
2644                 selection = g_new0 (EvViewSelection, 1);
2645                 selection->page = i;
2646                 selection->rect.x1 = selection->rect.y1 = 0;
2647                 selection->rect.x2 = width;
2648                 selection->rect.y2 = height;
2649
2650                 view->selections = g_list_append (view->selections, selection);
2651         }
2652
2653         gtk_widget_queue_draw (GTK_WIDGET (view));
2654 }
2655
2656 static char *
2657 get_selected_text (EvView *ev_view)
2658 {
2659         GString *text;
2660         GList *l;
2661
2662         text = g_string_new (NULL);
2663
2664         ev_document_doc_mutex_lock ();
2665
2666         for (l = ev_view->selections; l != NULL; l = l->next) {
2667                 EvViewSelection *selection = (EvViewSelection *)l->data;
2668                 char *tmp;
2669
2670                 tmp = ev_document_get_text (ev_view->document,
2671                                             selection->page,
2672                                             &selection->rect);
2673                 g_string_append (text, tmp);
2674                 g_free (tmp);
2675         }
2676
2677         ev_document_doc_mutex_unlock ();
2678
2679         return g_string_free (text, FALSE);
2680 }
2681
2682 void
2683 ev_view_copy (EvView *ev_view)
2684 {
2685         GtkClipboard *clipboard;
2686         char *text;
2687
2688         if (!ev_document_can_get_text (ev_view->document)) {
2689                 return;
2690         }
2691
2692         text = get_selected_text (ev_view);
2693         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
2694                                               GDK_SELECTION_CLIPBOARD);
2695         gtk_clipboard_set_text (clipboard, text, -1);
2696         g_free (text);
2697 }
2698
2699 static void
2700 ev_view_primary_get_cb (GtkClipboard     *clipboard,
2701                         GtkSelectionData *selection_data,
2702                         guint             info,
2703                         gpointer          data)
2704 {
2705         EvView *ev_view = EV_VIEW (data);
2706         char *text;
2707
2708         if (!ev_document_can_get_text (ev_view->document)) {
2709                 return;
2710         }
2711
2712         text = get_selected_text (ev_view);
2713         gtk_selection_data_set_text (selection_data, text, -1);
2714         g_free (text);
2715 }
2716
2717 static void
2718 ev_view_primary_clear_cb (GtkClipboard *clipboard,
2719                           gpointer      data)
2720 {
2721         EvView *view = EV_VIEW (data);
2722
2723         clear_selection (view);
2724 }
2725
2726 static void
2727 ev_view_update_primary_selection (EvView *ev_view)
2728 {
2729         GtkClipboard *clipboard;
2730
2731         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
2732                                               GDK_SELECTION_PRIMARY);
2733
2734         if (ev_view->selections) {
2735                 if (!gtk_clipboard_set_with_owner (clipboard,
2736                                                    targets,
2737                                                    G_N_ELEMENTS (targets),
2738                                                    ev_view_primary_get_cb,
2739                                                    ev_view_primary_clear_cb,
2740                                                    G_OBJECT (ev_view)))
2741                         ev_view_primary_clear_cb (clipboard, ev_view);
2742         } else {
2743                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
2744                         gtk_clipboard_clear (clipboard);
2745         }
2746 }
2747
2748 /*** Cursor operations ***/
2749
2750 static GdkCursor *
2751 ev_view_create_invisible_cursor(void)
2752 {
2753        GdkBitmap *empty;
2754        GdkColor black = { 0, 0, 0, 0 };
2755        static char bits[] = { 0x00 };
2756
2757        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
2758
2759        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
2760 }
2761
2762 static void
2763 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
2764 {
2765         GdkCursor *cursor = NULL;
2766         GdkDisplay *display;
2767         GtkWidget *widget;
2768
2769         if (view->cursor == new_cursor) {
2770                 return;
2771         }
2772
2773         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
2774         display = gtk_widget_get_display (widget);
2775         view->cursor = new_cursor;
2776
2777         switch (new_cursor) {
2778                 case EV_VIEW_CURSOR_NORMAL:
2779                         gdk_window_set_cursor (widget->window, NULL);
2780                         break;
2781                 case EV_VIEW_CURSOR_LINK:
2782                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
2783                         break;
2784                 case EV_VIEW_CURSOR_WAIT:
2785                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
2786                         break;
2787                 case EV_VIEW_CURSOR_HIDDEN:
2788                         cursor = ev_view_create_invisible_cursor ();
2789                         break;
2790                 case EV_VIEW_CURSOR_DRAG:
2791                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
2792                         break;
2793         }
2794
2795         if (cursor) {
2796                 gdk_window_set_cursor (widget->window, cursor);
2797                 gdk_cursor_unref (cursor);
2798                 gdk_flush();
2799         }
2800 }
2801
2802 void
2803 ev_view_hide_cursor (EvView *view)
2804 {
2805        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
2806 }
2807
2808 void
2809 ev_view_show_cursor (EvView *view)
2810 {
2811        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
2812 }
2813
2814 /*** Enum description for usage in signal ***/
2815
2816 GType
2817 ev_sizing_mode_get_type (void)
2818 {
2819   static GType etype = 0;
2820   if (etype == 0) {
2821     static const GEnumValue values[] = {
2822       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
2823       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
2824       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
2825       { 0, NULL, NULL }
2826     };
2827     etype = g_enum_register_static ("EvSizingMode", values);
2828   }
2829   return etype;
2830 }
2831