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 };
  53
  54 enum {
  55         SIGNAL_SCROLL_VIEW,
  56         SIGNAL_ZOOM_INVALID,
  57         N_SIGNALS,
  58 };
  59
  60 enum {
  61         TARGET_STRING,
  62         TARGET_TEXT,
  63         TARGET_COMPOUND_TEXT,
  64         TARGET_UTF8_STRING,
  65         TARGET_TEXT_BUFFER_CONTENTS
  66 };
  67
  68 static const GtkTargetEntry targets[] = {
  69         { "STRING", 0, TARGET_STRING },
  70         { "TEXT",   0, TARGET_TEXT },
  71         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  72         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  73 };
  74
  75 static guint signals[N_SIGNALS];
  76
  77 typedef enum {
  78         EV_VIEW_CURSOR_NORMAL,
  79         EV_VIEW_CURSOR_LINK,
  80         EV_VIEW_CURSOR_WAIT,
  81         EV_VIEW_CURSOR_HIDDEN,
  82         EV_VIEW_CURSOR_DRAG
  83 } EvViewCursor;
  84
  85 #define ZOOM_IN_FACTOR  1.2
  86 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  87
  88 #define MIN_SCALE 0.05409
  89 #define MAX_SCALE 6.0
  90
  91 typedef struct {
  92         EvRectangle rect;
  93         int page;
  94 } EvViewSelection;
  95
  96 typedef struct {
  97         gboolean dragging;
  98         GdkPoint start;
  99         gdouble hadj;
 100         gdouble vadj;
 101 } DragInfo;
 102
 103 typedef enum {
 104         SCROLL_TO_KEEP_POSITION,
 105         SCROLL_TO_CURRENT_PAGE,
 106         SCROLL_TO_CENTER
 107 } PendingScroll;
 108
 109 struct _EvView {
 110         GtkWidget parent_instance;
 111
 112         EvDocument *document;
 113
 114         char *status;
 115         char *find_status;
 116
 117         gint scroll_x;
 118         gint scroll_y;
 119
 120         DragInfo drag_info;
 121         gboolean pressed_button;
 122         GdkPoint selection_start;
 123         GList *selections;
 124         EvViewCursor cursor;
 125
 126         GtkAdjustment *hadjustment;
 127         GtkAdjustment *vadjustment;
 128
 129         EvPageCache *page_cache;
 130         EvPixbufCache *pixbuf_cache;
 131
 132         gint start_page;
 133         gint end_page;
 134         gint current_page;
 135
 136         EvJobRender *current_job;
 137
 138         int find_page;
 139         int find_result;
 140         int spacing;
 141
 142         double scale;
 143         GtkBorder border;
 144
 145         gboolean continuous;
 146         gboolean dual_page;
 147         gboolean fullscreen;
 148         gboolean presentation;
 149         EvSizingMode sizing_mode;
 150
 151         PendingScroll pending_scroll;
 152         gboolean pending_resize;
 153 };
 154
 155 struct _EvViewClass {
 156         GtkWidgetClass parent_class;
 157
 158         void    (*set_scroll_adjustments) (EvView         *view,
 159                                            GtkAdjustment  *hadjustment,
 160                                            GtkAdjustment  *vadjustment);
 161         void    (*scroll_view)            (EvView         *view,
 162                                            GtkScrollType   scroll,
 163                                            gboolean        horizontal);
 164         void    (*zoom_invalid)           (EvView         *view);
 165 };
 166
 167 /*** Scrolling ***/
 168 static void       view_update_adjustments                    (EvView             *view);
 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       view_scroll_to_page                        (EvView             *view,
 174                                                               gint                new_page);
 175 static void       set_scroll_adjustment                      (EvView             *view,
 176                                                               GtkOrientation      orientation,
 177                                                               GtkAdjustment      *adjustment);
 178 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 179                                                               GtkAdjustment      *hadjustment,
 180                                                               GtkAdjustment      *vadjustment);
 181 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 182                                                               guint               keyval,
 183                                                               GtkScrollType       scroll,
 184                                                               gboolean            horizontal);
 185 static void       ev_view_scroll_view                        (EvView             *view,
 186                                                               GtkScrollType       scroll,
 187                                                               gboolean            horizontal);
 188 static void       ensure_rectangle_is_visible                (EvView             *view,
 189                                                               GdkRectangle       *rect);
 190
 191 /*** Geometry computations ***/
 192 static void       compute_border                             (EvView             *view,
 193                                                               int                 width,
 194                                                               int                 height,
 195                                                               GtkBorder          *border);
 196 static gboolean   get_page_extents                           (EvView             *view,
 197                                                               gint                page,
 198                                                               GdkRectangle       *page_area,
 199                                                               GtkBorder          *border);
 200 static void       view_rect_to_doc_rect                      (EvView             *view,
 201                                                               GdkRectangle       *view_rect,
 202                                                               GdkRectangle       *page_area,
 203                                                               EvRectangle        *doc_rect);
 204 static void       doc_rect_to_view_rect                      (EvView             *view,
 205                                                               int                 page,
 206                                                               EvRectangle        *doc_rect,
 207                                                               GdkRectangle       *view_rect);
 208 static void       get_bounding_box_size                      (EvView             *view,
 209                                                               int                *max_width,
 210                                                               int                *max_height);
 211 static void       find_page_at_location                      (EvView             *view,
 212                                                               gdouble             x,
 213                                                               gdouble             y,
 214                                                               gint               *page,
 215                                                               gint               *x_offset,
 216                                                               gint               *y_offset);
 217
 218 /*** Hyperrefs ***/
 219 static EvLink*    get_link_at_location                       (EvView             *view,
 220                                                               gdouble             x,
 221                                                               gdouble             y);
 222 static void       go_to_link                                 (EvView             *view,
 223                                                               EvLink             *link);
 224 static char*      status_message_from_link                   (EvView             *view,
 225                                                               EvLink             *link);
 226
 227 /*** GtkWidget implementation ***/
 228 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 229                                                               GtkRequisition     *requisition);
 230 static void       ev_view_size_request_continuous            (EvView             *view,
 231                                                               GtkRequisition     *requisition);
 232 static void       ev_view_size_request_dual_page             (EvView             *view,
 233                                                               GtkRequisition     *requisition);
 234 static void       ev_view_size_request_single_page           (EvView             *view,
 235                                                               GtkRequisition     *requisition);
 236 static void       ev_view_size_request                       (GtkWidget          *widget,
 237                                                               GtkRequisition     *requisition);
 238 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 239                                                               GtkAllocation      *allocation);
 240 static void       ev_view_realize                            (GtkWidget          *widget);
 241 static void       ev_view_unrealize                          (GtkWidget          *widget);
 242 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 243                                                               GdkEventScroll     *event);
 244 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 245                                                               GdkEventExpose     *event);
 246 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 247                                                               GdkEventButton     *event);
 248 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 249                                                               GdkEventMotion     *event);
 250 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 251                                                               GdkEventButton     *event);
 252
 253 /*** Drawing ***/
 254 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 255 static void       draw_rubberband                            (GtkWidget          *widget,
 256                                                               GdkWindow          *window,
 257                                                               const GdkRectangle *rect,
 258                                                               guchar              alpha);
 259 static void       highlight_find_results                     (EvView             *view,
 260                                                               int                 page);
 261 static void       draw_one_page                              (EvView             *view,
 262                                                               gint                page,
 263                                                               GdkRectangle       *page_area,
 264                                                               GtkBorder          *border,
 265                                                               GdkRectangle       *expose_area);
 266
 267 /*** Callbacks ***/
 268 static void       find_changed_cb                            (EvDocument         *document,
 269                                                               int                 page,
 270                                                               EvView             *view);
 271 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 272                                                               EvView             *view);
 273 static void       page_changed_cb                            (EvPageCache        *page_cache,
 274                                                               int                 new_page,
 275                                                               EvView             *view);
 276 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 277                                                               EvView             *view);
 278
 279 /*** GObject ***/
 280 static void       ev_view_finalize                           (GObject            *object);
 281 static void       ev_view_destroy                            (GtkObject          *object);
 282 static void       ev_view_set_property                       (GObject            *object,
 283                                                               guint               prop_id,
 284                                                               const GValue       *value,
 285                                                               GParamSpec         *pspec);
 286 static void       ev_view_get_property                       (GObject            *object,
 287                                                               guint               prop_id,
 288                                                               GValue             *value,
 289                                                               GParamSpec         *pspec);
 290 static void       ev_view_class_init                         (EvViewClass        *class);
 291 static void       ev_view_init                               (EvView             *view);
 292
 293 /*** Zoom and sizing ***/
 294 static double   zoom_for_size_fit_width                      (int doc_width,
 295                                                               int doc_height,
 296                                                               int target_width,
 297                                                               int target_height,
 298                                                               int vsb_width);
 299 static double   zoom_for_size_best_fit                       (int doc_width,
 300                                                               int doc_height,
 301                                                               int target_width,
 302                                                               int target_height,
 303                                                               int vsb_width,
 304                                                               int hsb_width);
 305 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 306                                                               int     width,
 307                                                               int     height);
 308 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 309                                                                 int     width,
 310                                                                 int     height,
 311                                                                 int     vsb_width,
 312                                                                 int     hsb_height);
 313 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 314                                                                 int     width,
 315                                                                 int     height,
 316                                                                 int     vsb_width,
 317                                                                 int     hsb_height);
 318 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 319                                                                 int     width,
 320                                                                 int     height,
 321                                                                 int     vsb_width,
 322                                                                 int     hsb_height);
 323 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 324                                                                 int     width,
 325                                                                 int     height,
 326                                                                 int     vsb_width,
 327                                                                 int     hsb_height);
 328 /*** Cursors ***/
 329 static GdkCursor* ev_view_create_invisible_cursor            (void);
 330 static void       ev_view_set_cursor                         (EvView             *view,
 331                                                               EvViewCursor        new_cursor);
 332
 333 /*** Status messages ***/
 334 static void       ev_view_set_status                         (EvView             *view,
 335                                                               const char         *message);
 336 static void       update_find_status_message                 (EvView             *view);
 337 static void       ev_view_set_find_status                    (EvView             *view,
 338                                                               const char         *message);
 339 /*** Find ***/
 340 static void       jump_to_find_result                        (EvView             *view);
 341 static void       jump_to_find_page                          (EvView             *view);
 342
 343 /*** Selection ***/
 344 static void       compute_selections                         (EvView             *view,
 345                                                               GdkRectangle       *view_rect);
 346 static void       clear_selection                            (EvView             *view);
 347 static char*      get_selected_text                          (EvView             *ev_view);
 348 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 349                                                               GtkSelectionData   *selection_data,
 350                                                               guint               info,
 351                                                               gpointer            data);
 352 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 353                                                               gpointer            data);
 354 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 355
 356
 357 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 358
 359 static void
 360 view_update_adjustments (EvView *view)
 361 {
 362         int dx = 0, dy = 0;
 363
 364         if (! GTK_WIDGET_REALIZED (view))
 365                 return;
 366
 367         if (view->hadjustment) {
 368                 dx = view->scroll_x - view->hadjustment->value;
 369                 view->scroll_x = view->hadjustment->value;
 370         } else {
 371                 view->scroll_x = 0;
 372         }
 373
 374         if (view->vadjustment) {
 375                 dy = view->scroll_y - view->vadjustment->value;
 376                 view->scroll_y = view->vadjustment->value;
 377         } else {
 378                 view->scroll_y = 0;
 379         }
 380
 381
 382         if (view->pending_resize)
 383                 gtk_widget_queue_draw (GTK_WIDGET (view));
 384         else
 385                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
 386
 387
 388         if (view->document)
 389                 view_update_range_and_current_page (view);
 390 }
 391
 392 static void
 393 view_set_adjustment_values (EvView         *view,
 394                             GtkOrientation  orientation)
 395 {
 396         GtkWidget *widget = GTK_WIDGET (view);
 397         GtkAdjustment *adjustment;
 398         int requisition;
 399         int allocation;
 400
 401         double factor;
 402         gint new_value;
 403
 404         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 405                 requisition = widget->requisition.width;
 406                 allocation = widget->allocation.width;
 407                 adjustment = view->hadjustment;
 408         } else {
 409                 requisition = widget->requisition.height;
 410                 allocation = widget->allocation.height;
 411                 adjustment = view->vadjustment;
 412         }
 413
 414         if (!adjustment)
 415                 return;
 416
 417         factor = 1.0;
 418         switch (view->pending_scroll) {
 419                 case SCROLL_TO_KEEP_POSITION:
 420                         factor = adjustment->value / adjustment->upper;
 421                         break;
 422                 case SCROLL_TO_CURRENT_PAGE:
 423                         break;
 424                 case SCROLL_TO_CENTER:
 425                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 426                         break;
 427         }
 428
 429         adjustment->page_size = allocation;
 430         adjustment->step_increment = allocation * 0.1;
 431         adjustment->page_increment = allocation * 0.9;
 432         adjustment->lower = 0;
 433         adjustment->upper = MAX (allocation, requisition);
 434
 435         switch (view->pending_scroll) {
 436                 case SCROLL_TO_KEEP_POSITION:
 437                         new_value = CLAMP (adjustment->upper * factor, 0, adjustment->upper - adjustment->page_size);
 438                         gtk_adjustment_set_value (adjustment, new_value);
 439                         break;
 440                 case SCROLL_TO_CURRENT_PAGE:
 441                         if (orientation == GTK_ORIENTATION_VERTICAL) {
 442                                 view_scroll_to_page (view, view->current_page);
 443                         }
 444                         break;
 445                 case SCROLL_TO_CENTER:
 446                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5, 0, adjustment->upper - adjustment->page_size);
 447                         gtk_adjustment_set_value (adjustment, new_value);
 448                         break;
 449         }
 450
 451         gtk_adjustment_changed (adjustment);
 452 }
 453
 454 static void
 455 view_update_range_and_current_page (EvView *view)
 456 {
 457         /* Presentation trumps all other modes */
 458         if (view->presentation) {
 459                 view->start_page = view->current_page;
 460                 view->end_page = view->current_page;
 461         } else if (view->continuous) {
 462                 GdkRectangle current_area, unused, page_area;
 463                 gint current_page;
 464                 gboolean found = FALSE;
 465                 int i;
 466
 467                 get_bounding_box_size (view, &(page_area.width), &(page_area.height));
 468                 page_area.x = view->spacing;
 469                 page_area.y = view->spacing;
 470
 471                 if (view->hadjustment) {
 472                         current_area.x = view->hadjustment->value;
 473                         current_area.width = view->hadjustment->page_size;
 474                 } else {
 475                         current_area.x = page_area.x;
 476                         current_area.width = page_area.width;
 477                 }
 478
 479                 if (view->vadjustment) {
 480                         current_area.y = view->vadjustment->value;
 481                         current_area.height = view->vadjustment->page_size;
 482                 } else {
 483                         current_area.y = page_area.y;
 484                         current_area.height = page_area.height;
 485                 }
 486
 487                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 488                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 489                                 if (! found) {
 490                                         view->start_page = i;
 491                                         found = TRUE;
 492
 493                                 }
 494                                 view->end_page = i;
 495                         } else if (found) {
 496                                 break;
 497                         }
 498                         if (view->dual_page) {
 499                                 if (i % 2 == 0) {
 500                                         page_area.x += page_area.width + view->spacing;
 501                                 } else {
 502                                         page_area.x = view->spacing;
 503                                         page_area.y += page_area.height + view->spacing;
 504                                 }
 505                         } else {
 506                                 page_area.y += page_area.height + view->spacing;
 507                         }
 508                 }
 509
 510                 current_page = ev_page_cache_get_current_page (view->page_cache);
 511
 512                 if (current_page < view->start_page || current_page > view->end_page) {
 513                         view->current_page = view->start_page;
 514                         ev_page_cache_set_current_page (view->page_cache, view->start_page);
 515                 }
 516         } else {
 517                 if (view->dual_page) {
 518                         if (view->current_page % 2 == 0) {
 519                                 view->start_page = view->current_page;
 520                                 if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 521                                         view->end_page = view->start_page + 1;
 522                         } else {
 523                                 view->start_page = view->current_page - 1;
 524                                 view->end_page = view->current_page;
 525                         }
 526                 } else {
 527                         view->start_page = view->current_page;
 528                         view->end_page = view->current_page;
 529                 }
 530         }
 531
 532         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 533                                         view->start_page,
 534                                         view->end_page,
 535                                         view->scale);
 536 }
 537
 538 static void
 539 view_scroll_to_page (EvView *view, gint new_page)
 540 {
 541         EvPageCache *page_cache = view->page_cache;
 542         int old_width, old_height;
 543         int new_width, new_height;
 544         int max_height, max_width, n_rows;
 545
 546         ev_page_cache_get_size (page_cache,
 547                                 view->current_page,
 548                                 view->scale,
 549                                 &old_width, &old_height);
 550
 551         ev_page_cache_get_size (page_cache,
 552                                 new_page,
 553                                 view->scale,
 554                                 &new_width, &new_height);
 555
 556         compute_border (view, new_width, new_height, &(view->border));
 557
 558         if (new_width != old_width || new_height != old_height)
 559                 gtk_widget_queue_resize (GTK_WIDGET (view));
 560         else
 561                 gtk_widget_queue_draw (GTK_WIDGET (view));
 562
 563         get_bounding_box_size (view, &max_width, &max_height);
 564
 565         if (view->vadjustment) {
 566                 if (view->continuous) {
 567
 568                         n_rows = view->dual_page ? new_page / 2 : new_page;
 569
 570                         gtk_adjustment_clamp_page(view->vadjustment,
 571                                                   (max_height + view->spacing) * n_rows,
 572                                                   (max_height + view->spacing) * n_rows +
 573                                                    view->vadjustment->page_size);
 574                 } else {
 575                         gtk_adjustment_set_value (view->vadjustment,
 576                                                   view->vadjustment->lower);
 577                 }
 578         }
 579
 580         if (view->hadjustment) {
 581                 if (view->dual_page) {
 582                         if (new_page % 2 == 0) {
 583                                 gtk_adjustment_set_value (view->hadjustment,
 584                                                           view->hadjustment->lower);
 585                         } else {
 586                                 gtk_adjustment_clamp_page (view->hadjustment,
 587                                                            view->hadjustment->lower +
 588                                                            max_width + view->spacing,
 589                                                            view->hadjustment->lower +
 590                                                            max_width + view->spacing +
 591                                                            view->hadjustment->page_size);
 592                         }
 593                 } else {
 594                                 gtk_adjustment_set_value (view->hadjustment,
 595                                                           CLAMP (view->hadjustment->value,
 596                                                           view->hadjustment->lower,
 597                                                           view->hadjustment->upper -
 598                                                           view->hadjustment->page_size));
 599                 }
 600         }
 601
 602         view->current_page = new_page;
 603         view_update_range_and_current_page (view);
 604 }
 605
 606 static void
 607 set_scroll_adjustment (EvView *view,
 608                        GtkOrientation  orientation,
 609                        GtkAdjustment  *adjustment)
 610 {
 611         GtkAdjustment **to_set;
 612
 613         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 614                 to_set = &view->hadjustment;
 615         else
 616                 to_set = &view->vadjustment;
 617
 618         if (*to_set != adjustment) {
 619                 if (*to_set) {
 620                         g_signal_handlers_disconnect_by_func (*to_set,
 621                                                               (gpointer) on_adjustment_value_changed,
 622                                                               view);
 623                         g_object_unref (*to_set);
 624                 }
 625
 626                 *to_set = adjustment;
 627                 view_set_adjustment_values (view, orientation);
 628
 629                 if (*to_set) {
 630                         g_object_ref (*to_set);
 631                         g_signal_connect (*to_set, "value_changed",
 632                                           G_CALLBACK (on_adjustment_value_changed), view);
 633                 }
 634         }
 635 }
 636
 637 static void
 638 ev_view_set_scroll_adjustments (EvView *view,
 639                                 GtkAdjustment  *hadjustment,
 640                                 GtkAdjustment  *vadjustment)
 641 {
 642         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 643         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 644
 645         view_update_adjustments (view);
 646 }
 647
 648 static void
 649 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 650                            guint           keyval,
 651                            GtkScrollType   scroll,
 652                            gboolean        horizontal)
 653 {
 654   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 655
 656   gtk_binding_entry_add_signal (binding_set, keyval, 0,
 657                                 "scroll_view", 2,
 658                                 GTK_TYPE_SCROLL_TYPE, scroll,
 659                                 G_TYPE_BOOLEAN, horizontal);
 660   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
 661                                 "scroll_view", 2,
 662                                 GTK_TYPE_SCROLL_TYPE, scroll,
 663                                 G_TYPE_BOOLEAN, horizontal);
 664 }
 665
 666 void
 667 ev_view_scroll (EvView        *view,
 668                 EvScrollType   scroll)
 669 {
 670         GtkAdjustment *adjustment;
 671         double value, increment;
 672         gboolean first_page = FALSE;
 673         gboolean last_page = FALSE;
 674
 675         /* Assign values for increment and vertical adjustment */
 676         adjustment = view->vadjustment;
 677         increment = adjustment->page_size * 0.75;
 678         value = adjustment->value;
 679
 680         /* Assign boolean for first and last page */
 681         if (view->current_page == 0)
 682                 first_page = TRUE;
 683         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 684                 last_page = TRUE;
 685
 686         switch (scroll) {
 687                 case EV_SCROLL_PAGE_BACKWARD:
 688                         /* Do not jump backwards if at the first page */
 689                         if (value == (adjustment->lower) && first_page) {
 690                                 /* Do nothing */
 691                                 /* At the top of a page, assign the upper bound limit of previous page */
 692                         } else if (value == (adjustment->lower)) {
 693                                 value = adjustment->upper - adjustment->page_size;
 694                                 ev_page_cache_set_current_page (view->page_cache, view->current_page - 1);
 695                                 /* Jump to the top */
 696                         } else {
 697                                 value = MAX (value - increment, adjustment->lower);
 698                         }
 699                         break;
 700                 case EV_SCROLL_PAGE_FORWARD:
 701                         /* Do not jump forward if at the last page */
 702                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 703                                 /* Do nothing */
 704                         /* At the bottom of a page, assign the lower bound limit of next page */
 705                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 706                                 value = 0;
 707                                 ev_page_cache_set_current_page (view->page_cache, view->current_page + 1);
 708                         /* Jump to the bottom */
 709                         } else {
 710                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 711                         }
 712                         break;
 713                 default:
 714                         break;
 715         }
 716
 717         gtk_adjustment_set_value (adjustment, value);
 718 }
 719
 720 static void
 721 ev_view_scroll_view (EvView *view,
 722                      GtkScrollType scroll,
 723                      gboolean horizontal)
 724 {
 725         GtkAdjustment *adjustment;
 726         double value;
 727
 728         if (horizontal) {
 729                 adjustment = view->hadjustment;
 730         } else {
 731                 adjustment = view->vadjustment;
 732         }
 733
 734         value = adjustment->value;
 735
 736         switch (scroll) {
 737                 case GTK_SCROLL_STEP_BACKWARD:
 738                         value -= adjustment->step_increment;
 739                         break;
 740                 case GTK_SCROLL_STEP_FORWARD:
 741                         value += adjustment->step_increment;
 742                         break;
 743                 default:
 744                         break;
 745         }
 746
 747         value = CLAMP (value, adjustment->lower,
 748                        adjustment->upper - adjustment->page_size);
 749
 750         gtk_adjustment_set_value (adjustment, value);
 751 }
 752
 753 #define MARGIN 5
 754
 755 static void
 756 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 757 {
 758         GtkWidget *widget = GTK_WIDGET (view);
 759         GtkAdjustment *adjustment;
 760         int value;
 761
 762         adjustment = view->vadjustment;
 763
 764         if (rect->y < adjustment->value) {
 765                 value = MAX (adjustment->lower, rect->y - MARGIN);
 766                 gtk_adjustment_set_value (view->vadjustment, value);
 767         } else if (rect->y + rect->height >
 768                    adjustment->value + widget->allocation.height) {
 769                 value = MIN (adjustment->upper, rect->y + rect->height -
 770                              widget->allocation.height + MARGIN);
 771                 gtk_adjustment_set_value (view->vadjustment, value);
 772         }
 773
 774         adjustment = view->hadjustment;
 775
 776         if (rect->x < adjustment->value) {
 777                 value = MAX (adjustment->lower, rect->x - MARGIN);
 778                 gtk_adjustment_set_value (view->hadjustment, value);
 779         } else if (rect->x + rect->height >
 780                    adjustment->value + widget->allocation.width) {
 781                 value = MIN (adjustment->upper, rect->x + rect->width -
 782                              widget->allocation.width + MARGIN);
 783                 gtk_adjustment_set_value (view->hadjustment, value);
 784         }
 785 }
 786
 787 /*** Geometry computations ***/
 788
 789 static void
 790 compute_border (EvView *view, int width, int height, GtkBorder *border)
 791 {
 792         if (view->presentation) {
 793                 border->left = 0;
 794                 border->right = 0;
 795                 border->top = 0;
 796                 border->bottom = 0;
 797         } else {
 798                 ev_document_misc_get_page_border_size (width, height, border);
 799         }
 800 }
 801
 802 static gboolean
 803 get_page_extents (EvView       *view,
 804                   gint          page,
 805                   GdkRectangle *page_area,
 806                   GtkBorder    *border)
 807 {
 808         GtkWidget *widget;
 809         int width, height;
 810
 811         widget = GTK_WIDGET (view);
 812
 813         /* Quick sanity check */
 814         if (view->presentation) {
 815                 if (view->current_page != page)
 816                         return FALSE;
 817         } else if (view->continuous) {
 818                 if (page < view->start_page ||
 819                     page > view->end_page)
 820                         return FALSE;
 821         } else if (view->dual_page) {
 822                 if (ABS (page - view->current_page) > 1)
 823                         return FALSE;
 824         } else {
 825                 if (view->current_page != page)
 826                         return FALSE;
 827         }
 828
 829         /* Get the size of the page */
 830         ev_page_cache_get_size (view->page_cache, page,
 831                                 view->scale,
 832                                 &width, &height);
 833         compute_border (view, width, height, border);
 834         page_area->width = width + border->left + border->right;
 835         page_area->height = height + border->top + border->bottom;
 836
 837         if (view->presentation) {
 838                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 839                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 840         } else if (view->continuous) {
 841                 gint max_width, max_height;
 842                 gint x, y;
 843
 844                 get_bounding_box_size (view, &max_width, &max_height);
 845                 /* Get the location of the bounding box */
 846                 if (view->dual_page) {
 847                         x = view->spacing + (page % 2) * (max_width + view->spacing);
 848                         y = view->spacing + (page / 2) * (max_height + view->spacing);
 849                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3))/2;
 850                 } else {
 851                         x = view->spacing;
 852                         y = view->spacing + page * (max_height + view->spacing);
 853                         x = x + MAX (0, widget->allocation.width - (max_width + view->spacing * 2))/2;
 854                 }
 855                 page_area->x = x;
 856                 page_area->y = y;
 857         } else {
 858                 gint x, y;
 859                 if (view->dual_page) {
 860                         gint width_2, height_2;
 861                         gint max_width = width;
 862                         gint max_height = height;
 863                         GtkBorder overall_border;
 864                         gint other_page;
 865
 866                         other_page = page ^ 1;
 867
 868                         /* First, we get the bounding box of the two pages */
 869                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
 870                                 ev_page_cache_get_size (view->page_cache,
 871                                                         page + 1,
 872                                                         view->scale,
 873                                                         &width_2, &height_2);
 874                                 if (width_2 > width)
 875                                         max_width = width_2;
 876                                 if (height_2 > height)
 877                                         max_height = height_2;
 878                         }
 879                         compute_border (view, max_width, max_height, &overall_border);
 880
 881                         /* Find the offsets */
 882                         x = view->spacing;
 883                         y = view->spacing;
 884
 885                         /* Adjust for being the left or right page */
 886                         if (page % 2 == 0)
 887                                 x = x + max_width - width;
 888                         else
 889                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 890
 891                         y = y + (max_height - height)/2;
 892
 893                         /* Adjust for extra allocation */
 894                         x = x + MAX (0, widget->allocation.width -
 895                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 896                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 897                 } else {
 898                         x = view->spacing;
 899                         y = view->spacing;
 900
 901                         /* Adjust for extra allocation */
 902                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2))/2;
 903                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 904                 }
 905
 906                 page_area->x = x;
 907                 page_area->y = y;
 908         }
 909
 910         return TRUE;
 911 }
 912
 913 static void
 914 view_rect_to_doc_rect (EvView *view,
 915                        GdkRectangle *view_rect,
 916                        GdkRectangle *page_area,
 917                        EvRectangle  *doc_rect)
 918 {
 919         doc_rect->x1 = floor ((view_rect->x - page_area->x) / view->scale);
 920         doc_rect->y1 = floor ((view_rect->y - page_area->y) / view->scale);
 921         doc_rect->x2 = doc_rect->x1 + ceil (view_rect->width / view->scale);
 922         doc_rect->y2 = doc_rect->y1 + ceil (view_rect->height / view->scale);
 923 }
 924
 925 static void
 926 doc_rect_to_view_rect (EvView       *view,
 927                        int           page,
 928                        EvRectangle  *doc_rect,
 929                        GdkRectangle *view_rect)
 930 {
 931         GdkRectangle page_area;
 932         GtkBorder border;
 933         int width, height;
 934
 935         get_page_extents (view, page, &page_area, &border);
 936
 937         width = doc_rect->x2 - doc_rect->x1;
 938         height = doc_rect->y2 - doc_rect->y1;
 939         view_rect->x = floor (doc_rect->x1 * view->scale) + page_area.x;
 940         view_rect->y = floor (doc_rect->y1 * view->scale) + page_area.y;
 941         view_rect->width = ceil (width * view->scale);
 942         view_rect->height = ceil (height * view->scale);
 943 }
 944
 945 static void
 946 get_bounding_box_size (EvView *view, int *max_width, int *max_height)
 947 {
 948         GtkBorder border;
 949         int width, height;
 950
 951         if (max_width) {
 952                 ev_page_cache_get_max_width_size (view->page_cache,
 953                                                   view->scale,
 954                                                   &width, &height);
 955                 compute_border (view, width, height, &border);
 956                 *max_width = width + border.left + border.right;
 957         }
 958
 959
 960         if (max_height) {
 961                 ev_page_cache_get_max_height_size (view->page_cache,
 962                                                    view->scale,
 963                                                    &width, &height);
 964                 compute_border (view, width, height, &border);
 965                 *max_height = height + border.top + border.bottom;
 966         }
 967 }
 968
 969 static void
 970 find_page_at_location (EvView  *view,
 971                        gdouble  x,
 972                        gdouble  y,
 973                        gint    *page,
 974                        gint    *x_offset,
 975                        gint    *y_offset)
 976 {
 977         int i;
 978
 979         if (view->document == NULL)
 980                 return;
 981
 982         g_assert (page);
 983         g_assert (x_offset);
 984         g_assert (y_offset);
 985
 986         for (i = view->start_page; i <= view->end_page; i++) {
 987                 GdkRectangle page_area;
 988                 GtkBorder border;
 989
 990                 if (! get_page_extents (view, i, &page_area, &border))
 991                         continue;
 992
 993                 if ((x >= page_area.x + border.left) &&
 994                     (x < page_area.x + page_area.width - border.right) &&
 995                     (y >= page_area.y + border.top) &&
 996                     (y < page_area.y + page_area.height - border.bottom)) {
 997                         *page = i;
 998                         *x_offset = x - (page_area.x + border.left);
 999                         *y_offset = y - (page_area.y + border.top);
1000                         return;
1001                 }
1002         }
1003
1004         *page = -1;
1005 }
1006
1007 /*** Hyperref ***/
1008 static EvLink *
1009 get_link_at_location (EvView  *view,
1010                       gdouble  x,
1011                       gdouble  y)
1012 {
1013         gint page = -1;
1014         gint x_offset = 0, y_offset = 0;
1015         GList *link_mapping;
1016
1017         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1018
1019         if (page == -1)
1020                 return NULL;
1021
1022         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1023
1024         if (link_mapping)
1025                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
1026         else
1027                 return NULL;
1028 }
1029
1030 /* FIXME: standardize this sometime */
1031 static void
1032 go_to_link (EvView *view, EvLink *link)
1033 {
1034         EvLinkType type;
1035         const char *uri;
1036         int page;
1037
1038         type = ev_link_get_link_type (link);
1039
1040         switch (type) {
1041                 case EV_LINK_TYPE_TITLE:
1042                         break;
1043                 case EV_LINK_TYPE_PAGE:
1044                         page = ev_link_get_page (link);
1045                         ev_page_cache_set_current_page (view->page_cache, page);
1046                         break;
1047                 case EV_LINK_TYPE_EXTERNAL_URI:
1048                         uri = ev_link_get_uri (link);
1049                         gnome_vfs_url_show (uri);
1050                         break;
1051         }
1052 }
1053
1054 static char *
1055 status_message_from_link (EvView *view, EvLink *link)
1056 {
1057         EvLinkType type;
1058         char *msg = NULL;
1059         char *page_label;
1060
1061         type = ev_link_get_link_type (link);
1062
1063         switch (type) {
1064                 case EV_LINK_TYPE_TITLE:
1065                         if (ev_link_get_title (link))
1066                                 msg = g_strdup (ev_link_get_title (link));
1067                         break;
1068                 case EV_LINK_TYPE_PAGE:
1069                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
1070                         msg = g_strdup_printf (_("Go to page %s"), page_label);
1071                         g_free (page_label);
1072                         break;
1073                 case EV_LINK_TYPE_EXTERNAL_URI:
1074                         msg = g_strdup (ev_link_get_uri (link));
1075                         break;
1076                 default:
1077                         break;
1078         }
1079
1080         return msg;
1081 }
1082
1083
1084 /*** GtkWidget implementation ***/
1085
1086 static void
1087 ev_view_size_request_continuous_dual_page (EvView         *view,
1088                                                GtkRequisition *requisition)
1089 {
1090         int max_width, max_height;
1091         int n_rows;
1092
1093         get_bounding_box_size (view, &max_width, &max_height);
1094
1095         n_rows = (1 + ev_page_cache_get_n_pages (view->page_cache)) / 2;
1096
1097         requisition->width = (max_width * 2) + (view->spacing * 3);
1098         requisition->height = max_height * n_rows + (view->spacing * (n_rows + 1));
1099
1100         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1101                 requisition->width = 1;
1102         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1103                 requisition->width = 1;
1104                 /* FIXME: This could actually be set on one page docs or docs
1105                  * with a strange aspect ratio. */
1106                 /* requisition->height = 1;*/
1107         }
1108 }
1109
1110 static void
1111 ev_view_size_request_continuous (EvView         *view,
1112                                  GtkRequisition *requisition)
1113 {
1114         int max_width, max_height;
1115         int n_pages;
1116
1117         get_bounding_box_size (view, &max_width, &max_height);
1118
1119         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1120
1121         requisition->width = max_width + (view->spacing * 2);
1122         requisition->height = max_height * n_pages + (view->spacing * (n_pages + 1));
1123
1124         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1125                 requisition->width = 1;
1126         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1127                 requisition->width = 1;
1128                 /* FIXME: This could actually be set on one page docs or docs
1129                  * with a strange aspect ratio. */
1130                 /* requisition->height = 1;*/
1131         }
1132 }
1133
1134 static void
1135 ev_view_size_request_dual_page (EvView         *view,
1136                                 GtkRequisition *requisition)
1137 {
1138         GtkBorder border;
1139         gint width, height;
1140
1141         /* Find the largest of the two. */
1142         ev_page_cache_get_size (view->page_cache,
1143                                 view->current_page,
1144                                 view->scale,
1145                                 &width, &height);
1146         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1147                 gint width_2, height_2;
1148                 ev_page_cache_get_size (view->page_cache,
1149                                         view->current_page + 1,
1150                                         view->scale,
1151                                         &width_2, &height_2);
1152                 if (width_2 > width) {
1153                         width = width_2;
1154                         height = height_2;
1155                 }
1156         }
1157         compute_border (view, width, height, &border);
1158
1159         requisition->width = ((width + border.left + border.right) * 2) +
1160                 (view->spacing * 3);
1161         requisition->height = (height + border.top + border.bottom) +
1162                 (view->spacing * 2);
1163
1164         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1165                 requisition->width = 1;
1166         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1167                 requisition->width = 1;
1168                 requisition->height = 1;
1169         }
1170 }
1171
1172 static void
1173 ev_view_size_request_single_page (EvView         *view,
1174                                   GtkRequisition *requisition)
1175 {
1176         GtkBorder border;
1177         gint width, height;
1178
1179         ev_page_cache_get_size (view->page_cache,
1180                                 view->current_page,
1181                                 view->scale,
1182                                 &width, &height);
1183         compute_border (view, width, height, &border);
1184
1185         requisition->width = width + border.left + border.right + (2 * view->spacing);
1186         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1187
1188         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1189                 requisition->width = 1;
1190                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1191         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1192                 requisition->width = 1;
1193                 requisition->height = 1;
1194         }
1195 }
1196
1197 static void
1198 ev_view_size_request (GtkWidget      *widget,
1199                       GtkRequisition *requisition)
1200 {
1201         EvView *view = EV_VIEW (widget);
1202
1203         if (view->document == NULL) {
1204                 requisition->width = 1;
1205                 requisition->height = 1;
1206                 return;
1207         }
1208
1209         if (view->presentation) {
1210                 requisition->width = 1;
1211                 requisition->height = 1;
1212                 return;
1213         }
1214
1215         if (view->continuous && view->dual_page)
1216                 ev_view_size_request_continuous_dual_page (view, requisition);
1217         else if (view->continuous)
1218                 ev_view_size_request_continuous (view, requisition);
1219         else if (view->dual_page)
1220                 ev_view_size_request_dual_page (view, requisition);
1221         else
1222                 ev_view_size_request_single_page (view, requisition);
1223 }
1224
1225 static void
1226 ev_view_size_allocate (GtkWidget      *widget,
1227                        GtkAllocation  *allocation)
1228 {
1229         EvView *view = EV_VIEW (widget);
1230
1231         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1232                   view->sizing_mode == EV_SIZING_BEST_FIT) {
1233
1234                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1235
1236                 ev_view_size_request (widget, &widget->requisition);
1237         }
1238
1239         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1240         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1241
1242         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1243         view->pending_resize = FALSE;
1244
1245         if (view->document)
1246                 view_update_range_and_current_page (view);
1247
1248         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1249 }
1250
1251 static void
1252 ev_view_realize (GtkWidget *widget)
1253 {
1254         EvView *view = EV_VIEW (widget);
1255         GdkWindowAttr attributes;
1256
1257         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1258
1259
1260         attributes.window_type = GDK_WINDOW_CHILD;
1261         attributes.wclass = GDK_INPUT_OUTPUT;
1262         attributes.visual = gtk_widget_get_visual (widget);
1263         attributes.colormap = gtk_widget_get_colormap (widget);
1264
1265         attributes.x = widget->allocation.x;
1266         attributes.y = widget->allocation.y;
1267         attributes.width = widget->allocation.width;
1268         attributes.height = widget->allocation.height;
1269         attributes.event_mask = GDK_EXPOSURE_MASK |
1270                                 GDK_BUTTON_PRESS_MASK |
1271                                 GDK_BUTTON_RELEASE_MASK |
1272                                 GDK_SCROLL_MASK |
1273                                 GDK_KEY_PRESS_MASK |
1274                                 GDK_POINTER_MOTION_MASK |
1275                                 GDK_LEAVE_NOTIFY_MASK;
1276
1277         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1278                                          &attributes,
1279                                          GDK_WA_X | GDK_WA_Y |
1280                                          GDK_WA_COLORMAP |
1281                                          GDK_WA_VISUAL);
1282         gdk_window_set_user_data (widget->window, widget);
1283         widget->style = gtk_style_attach (widget->style, widget->window);
1284
1285         if (view->presentation)
1286                 gdk_window_set_background (widget->window, &widget->style->black);
1287         else
1288                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1289 }
1290
1291 static void
1292 ev_view_unrealize (GtkWidget *widget)
1293 {
1294         GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
1295 }
1296
1297 static gboolean
1298 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1299 {
1300         EvView *view = EV_VIEW (widget);
1301
1302         if ((event->state & GDK_CONTROL_MASK) != 0) {
1303
1304                  ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1305
1306                  if ((event->direction == GDK_SCROLL_UP ||
1307                         event->direction == GDK_SCROLL_LEFT) &&
1308                         ev_view_can_zoom_in (view)) {
1309                                 ev_view_zoom_in (view);
1310                  } else if (ev_view_can_zoom_out (view)) {
1311                                 ev_view_zoom_out (view);
1312                  }
1313
1314                  return TRUE;
1315         }
1316
1317         if ((event->state & GDK_SHIFT_MASK) != 0) {
1318                 if (event->direction == GDK_SCROLL_UP)
1319                         event->direction = GDK_SCROLL_LEFT;
1320                 if (event->direction == GDK_SCROLL_DOWN)
1321                         event->direction = GDK_SCROLL_RIGHT;
1322         }
1323
1324         return FALSE;
1325 }
1326
1327 static gboolean
1328 ev_view_expose_event (GtkWidget      *widget,
1329                       GdkEventExpose *event)
1330 {
1331         EvView *view = EV_VIEW (widget);
1332         GdkRectangle rubberband;
1333         GList *l;
1334         int i;
1335
1336         if (view->document == NULL)
1337                 return FALSE;
1338
1339         for (i = view->start_page; i <= view->end_page; i++) {
1340                 GdkRectangle page_area;
1341                 GtkBorder border;
1342
1343                 if (!get_page_extents (view, i, &page_area, &border))
1344                         continue;
1345
1346                 page_area.x -= view->scroll_x;
1347                 page_area.y -= view->scroll_y;
1348
1349                 draw_one_page (view, i, &page_area, &border, &(event->area));
1350
1351                 if (EV_IS_DOCUMENT_FIND (view->document)) {
1352                         highlight_find_results (view, i);
1353                 }
1354         }
1355
1356         for (l = view->selections; l != NULL; l = l->next) {
1357                 EvViewSelection *selection = (EvViewSelection *)l->data;
1358
1359                 doc_rect_to_view_rect (view, selection->page,
1360                                        &selection->rect, &rubberband);
1361                 if (rubberband.width > 0 && rubberband.height > 0) {
1362                         draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
1363                                          &rubberband, 0x40);
1364                 }
1365         }
1366
1367         return FALSE;
1368 }
1369
1370 static gboolean
1371 ev_view_button_press_event (GtkWidget      *widget,
1372                             GdkEventButton *event)
1373 {
1374         EvView *view = EV_VIEW (widget);
1375
1376         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1377                 gtk_widget_grab_focus (widget);
1378         }
1379
1380         view->pressed_button = event->button;
1381
1382         switch (event->button) {
1383                 case 1:
1384                         if (view->selections) {
1385                                 clear_selection (view);
1386                                 gtk_widget_queue_draw (widget);
1387                         }
1388
1389                         view->selection_start.x = event->x;
1390                         view->selection_start.y = event->y;
1391                         return TRUE;
1392                 case 2:
1393                         /* use root coordinates as reference point because
1394                          * scrolling changes window relative coordinates */
1395                         view->drag_info.start.x = event->x_root;
1396                         view->drag_info.start.y = event->y_root;
1397                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1398                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1399
1400                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1401
1402                         return TRUE;
1403         }
1404
1405         return FALSE;
1406 }
1407
1408 static gboolean
1409 ev_view_motion_notify_event (GtkWidget      *widget,
1410                              GdkEventMotion *event)
1411 {
1412         EvView *view = EV_VIEW (widget);
1413
1414         if (view->pressed_button == 1) {
1415                 GdkRectangle selection;
1416
1417                 selection.x = MIN (view->selection_start.x, event->x) + view->scroll_x;
1418                 selection.y = MIN (view->selection_start.y, event->y) + view->scroll_y;
1419                 selection.width = ABS (view->selection_start.x - event->x) + 1;
1420                 selection.height = ABS (view->selection_start.y - event->y) + 1;
1421
1422                 compute_selections (view, &selection);
1423
1424                 gtk_widget_queue_draw (widget);
1425
1426                 return TRUE;
1427         } else if (view->pressed_button == 2) {
1428                 if (!view->drag_info.dragging) {
1429                         gboolean start;
1430
1431                         start = gtk_drag_check_threshold (widget,
1432                                                           view->drag_info.start.x,
1433                                                           view->drag_info.start.y,
1434                                                           event->x_root,
1435                                                           event->y_root);
1436                         view->drag_info.dragging = start;
1437                 }
1438
1439                 if (view->drag_info.dragging) {
1440                         int dx, dy;
1441                         gdouble dhadj_value, dvadj_value;
1442
1443                         dx = event->x_root - view->drag_info.start.x;
1444                         dy = event->y_root - view->drag_info.start.y;
1445
1446                         dhadj_value = view->hadjustment->page_size *
1447                                       (gdouble)dx / widget->allocation.width;
1448                         dvadj_value = view->vadjustment->page_size *
1449                                       (gdouble)dy / widget->allocation.height;
1450
1451                         /* clamp scrolling to visible area */
1452                         gtk_adjustment_set_value (view->hadjustment,
1453                                                   MIN(view->drag_info.hadj - dhadj_value,
1454                                                       view->hadjustment->upper -
1455                                                       view->hadjustment->page_size));
1456                         gtk_adjustment_set_value (view->vadjustment,
1457                                                   MIN(view->drag_info.vadj - dvadj_value,
1458                                                       view->vadjustment->upper -
1459                                                       view->vadjustment->page_size));
1460
1461                         return TRUE;
1462                 }
1463         } else if (view->pressed_button <= 0 && view->document) {
1464                 EvLink *link;
1465
1466                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1467                 if (link) {
1468                         char *msg;
1469
1470                         msg = status_message_from_link (view, link);
1471                         ev_view_set_status (view, msg);
1472                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1473                         g_free (msg);
1474                 } else {
1475                         ev_view_set_status (view, NULL);
1476                         if (view->cursor == EV_VIEW_CURSOR_LINK) {
1477                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1478                         }
1479                 }
1480                 return TRUE;
1481         }
1482
1483         return FALSE;
1484 }
1485
1486 static gboolean
1487 ev_view_button_release_event (GtkWidget      *widget,
1488                               GdkEventButton *event)
1489 {
1490         EvView *view = EV_VIEW (widget);
1491
1492         if (view->pressed_button == 2) {
1493                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1494         }
1495
1496         view->pressed_button = -1;
1497         view->drag_info.dragging = FALSE;
1498
1499         if (view->selections) {
1500                 ev_view_update_primary_selection (view);
1501         } else if (view->document) {
1502                 EvLink *link;
1503
1504                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1505                 if (link) {
1506                         go_to_link (view, link);
1507                 }
1508         }
1509
1510         return FALSE;
1511 }
1512
1513 /*** Drawing ***/
1514
1515 static guint32
1516 ev_gdk_color_to_rgb (const GdkColor *color)
1517 {
1518   guint32 result;
1519   result = (0xff0000 | (color->red & 0xff00));
1520   result <<= 8;
1521   result |= ((color->green & 0xff00) | (color->blue >> 8));
1522   return result;
1523 }
1524
1525 static void
1526 draw_rubberband (GtkWidget *widget, GdkWindow *window,
1527                  const GdkRectangle *rect, guchar alpha)
1528 {
1529         GdkGC *gc;
1530         GdkPixbuf *pixbuf;
1531         GdkColor *fill_color_gdk;
1532         guint fill_color;
1533
1534         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
1535         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
1536
1537         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
1538                                  rect->width, rect->height);
1539         gdk_pixbuf_fill (pixbuf, fill_color);
1540
1541         gdk_draw_pixbuf (window, NULL, pixbuf,
1542                          0, 0,
1543                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1544                          rect->width, rect->height,
1545                          GDK_RGB_DITHER_NONE,
1546                          0, 0);
1547
1548         g_object_unref (pixbuf);
1549
1550         gc = gdk_gc_new (window);
1551         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
1552         gdk_draw_rectangle (window, gc, FALSE,
1553                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1554                             rect->width - 1,
1555                             rect->height - 1);
1556         g_object_unref (gc);
1557
1558         gdk_color_free (fill_color_gdk);
1559 }
1560
1561
1562 static void
1563 highlight_find_results (EvView *view, int page)
1564 {
1565         EvDocumentFind *find;
1566         int i, results = 0;
1567
1568         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
1569
1570         find = EV_DOCUMENT_FIND (view->document);
1571
1572         results = ev_document_find_get_n_results (find, page);
1573
1574         for (i = 0; i < results; i++) {
1575                 EvRectangle rectangle;
1576                 GdkRectangle view_rectangle;
1577                 guchar alpha;
1578
1579                 if (i == view->find_result && page == view->find_page) {
1580                         alpha = 0x90;
1581                 } else {
1582                         alpha = 0x20;
1583                 }
1584
1585                 ev_document_find_get_result (find, page,
1586                                              i, &rectangle);
1587                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
1588                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
1589                                  &view_rectangle, alpha);
1590         }
1591 }
1592
1593 static void
1594 draw_one_page (EvView       *view,
1595                gint          page,
1596                GdkRectangle *page_area,
1597                GtkBorder    *border,
1598                GdkRectangle *expose_area)
1599 {
1600         gint width, height;
1601         GdkPixbuf *scaled_image;
1602         GdkPixbuf *current_pixbuf;
1603         GdkRectangle overlap;
1604         GdkRectangle real_page_area;
1605
1606         g_assert (view->document);
1607
1608         if (!gdk_rectangle_intersect (page_area, expose_area, &overlap))
1609                 return;
1610
1611         ev_page_cache_get_size (view->page_cache,
1612                                 page, view->scale,
1613                                 &width, &height);
1614
1615         /* Render the document itself */
1616         real_page_area = *page_area;
1617
1618         real_page_area.x += border->left;
1619         real_page_area.y += border->top;
1620         real_page_area.width -= (border->left + border->right);
1621         real_page_area.height -= (border->top + border->bottom);
1622
1623         if (! gdk_rectangle_intersect (&real_page_area, expose_area, &overlap))
1624                 return;
1625
1626         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
1627                                          GTK_WIDGET (view),
1628                                          page_area, border);
1629
1630         current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
1631
1632         if (current_pixbuf == NULL)
1633                 scaled_image = NULL;
1634         else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
1635                  height == gdk_pixbuf_get_height (current_pixbuf))
1636                 scaled_image = g_object_ref (current_pixbuf);
1637         else
1638                 scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
1639                                                         width, height,
1640                                                         GDK_INTERP_NEAREST);
1641
1642         if (scaled_image) {
1643                 gdk_draw_pixbuf (GTK_WIDGET(view)->window,
1644                                  GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
1645                                  scaled_image,
1646                                  overlap.x - real_page_area.x,
1647                                  overlap.y - real_page_area.y,
1648                                  overlap.x, overlap.y,
1649                                  overlap.width, overlap.height,
1650                                  GDK_RGB_DITHER_NORMAL,
1651                                  0, 0);
1652                 g_object_unref (scaled_image);
1653         }
1654 }
1655
1656 /*** GObject functions ***/
1657
1658 static void
1659 ev_view_finalize (GObject *object)
1660 {
1661         EvView *view = EV_VIEW (object);
1662
1663         LOG ("Finalize");
1664
1665         g_free (view->status);
1666         g_free (view->find_status);
1667
1668         clear_selection (view);
1669
1670         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
1671 }
1672
1673 static void
1674 ev_view_destroy (GtkObject *object)
1675 {
1676         EvView *view = EV_VIEW (object);
1677
1678         if (view->document) {
1679                 g_object_unref (view->document);
1680                 view->document = NULL;
1681         }
1682         if (view->pixbuf_cache) {
1683                 g_object_unref (view->pixbuf_cache);
1684                 view->pixbuf_cache = NULL;
1685         }
1686         ev_view_set_scroll_adjustments (view, NULL, NULL);
1687
1688         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
1689 }
1690
1691 static void
1692 ev_view_set_property (GObject      *object,
1693                       guint         prop_id,
1694                       const GValue *value,
1695                       GParamSpec   *pspec)
1696 {
1697         EvView *view = EV_VIEW (object);
1698
1699         switch (prop_id)
1700         {
1701         case PROP_CONTINUOUS:
1702                 ev_view_set_continuous (view, g_value_get_boolean (value));
1703                 break;
1704         case PROP_DUAL_PAGE:
1705                 ev_view_set_dual_page (view, g_value_get_boolean (value));
1706                 break;
1707         case PROP_FULLSCREEN:
1708                 ev_view_set_fullscreen (view, g_value_get_boolean (value));
1709                 break;
1710         case PROP_PRESENTATION:
1711                 ev_view_set_presentation (view, g_value_get_boolean (value));
1712                 break;
1713         case PROP_SIZING_MODE:
1714                 ev_view_set_sizing_mode (view, g_value_get_enum (value));
1715                 break;
1716         default:
1717                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1718         }
1719 }
1720
1721 static void
1722 ev_view_get_property (GObject *object,
1723                       guint prop_id,
1724                       GValue *value,
1725                       GParamSpec *pspec)
1726 {
1727         EvView *view = EV_VIEW (object);
1728
1729         switch (prop_id)
1730         {
1731         case PROP_STATUS:
1732                 g_value_set_string (value, view->status);
1733                 break;
1734         case PROP_FIND_STATUS:
1735                 g_value_set_string (value, view->status);
1736                 break;
1737         case PROP_CONTINUOUS:
1738                 g_value_set_boolean (value, view->continuous);
1739                 break;
1740         case PROP_DUAL_PAGE:
1741                 g_value_set_boolean (value, view->dual_page);
1742                 break;
1743         case PROP_FULLSCREEN:
1744                 g_value_set_boolean (value, view->fullscreen);
1745                 break;
1746         case PROP_PRESENTATION:
1747                 g_value_set_boolean (value, view->presentation);
1748                 break;
1749         case PROP_SIZING_MODE:
1750                 g_value_set_enum (value, view->sizing_mode);
1751                 break;
1752         default:
1753                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1754         }
1755 }
1756
1757 static void
1758 ev_view_class_init (EvViewClass *class)
1759 {
1760         GObjectClass *object_class = G_OBJECT_CLASS (class);
1761         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
1762         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
1763         GtkBindingSet *binding_set;
1764
1765         object_class->finalize = ev_view_finalize;
1766         object_class->set_property = ev_view_set_property;
1767         object_class->get_property = ev_view_get_property;
1768
1769         widget_class->expose_event = ev_view_expose_event;
1770         widget_class->button_press_event = ev_view_button_press_event;
1771         widget_class->motion_notify_event = ev_view_motion_notify_event;
1772         widget_class->button_release_event = ev_view_button_release_event;
1773         widget_class->size_request = ev_view_size_request;
1774         widget_class->size_allocate = ev_view_size_allocate;
1775         widget_class->realize = ev_view_realize;
1776         widget_class->unrealize = ev_view_unrealize;
1777         widget_class->scroll_event = ev_view_scroll_event;
1778         gtk_object_class->destroy = ev_view_destroy;
1779
1780         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
1781         class->scroll_view = ev_view_scroll_view;
1782
1783         widget_class->set_scroll_adjustments_signal =
1784             g_signal_new ("set-scroll-adjustments",
1785                           G_OBJECT_CLASS_TYPE (object_class),
1786                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1787                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
1788                           NULL, NULL,
1789                           ev_marshal_VOID__OBJECT_OBJECT,
1790                           G_TYPE_NONE, 2,
1791                           GTK_TYPE_ADJUSTMENT,
1792                           GTK_TYPE_ADJUSTMENT);
1793
1794         signals[SIGNAL_SCROLL_VIEW] = g_signal_new ("scroll-view",
1795                          G_TYPE_FROM_CLASS (object_class),
1796                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1797                          G_STRUCT_OFFSET (EvViewClass, scroll_view),
1798                          NULL, NULL,
1799                          ev_marshal_VOID__ENUM_BOOLEAN,
1800                          G_TYPE_NONE, 2,
1801                          GTK_TYPE_SCROLL_TYPE,
1802                          G_TYPE_BOOLEAN);
1803
1804         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
1805                          G_TYPE_FROM_CLASS (object_class),
1806                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1807                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
1808                          NULL, NULL,
1809                          ev_marshal_VOID__VOID,
1810                          G_TYPE_NONE, 0, G_TYPE_NONE);
1811
1812         g_object_class_install_property (object_class,
1813                                          PROP_STATUS,
1814                                          g_param_spec_string ("status",
1815                                                               "Status Message",
1816                                                               "The status message",
1817                                                               NULL,
1818                                                               G_PARAM_READABLE));
1819
1820         g_object_class_install_property (object_class,
1821                                          PROP_FIND_STATUS,
1822                                          g_param_spec_string ("find-status",
1823                                                               "Find Status Message",
1824                                                               "The find status message",
1825                                                               NULL,
1826                                                               G_PARAM_READABLE));
1827
1828         g_object_class_install_property (object_class,
1829                                          PROP_CONTINUOUS,
1830                                          g_param_spec_boolean ("continuous",
1831                                                                "Continuous",
1832                                                                "Continuous scrolling mode",
1833                                                                TRUE,
1834                                                                G_PARAM_READWRITE));
1835
1836         g_object_class_install_property (object_class,
1837                                          PROP_DUAL_PAGE,
1838                                          g_param_spec_boolean ("dual-page",
1839                                                                "Dual Page",
1840                                                                "Two pages visible at once",
1841                                                                FALSE,
1842                                                                G_PARAM_READWRITE));
1843         g_object_class_install_property (object_class,
1844                                          PROP_FULLSCREEN,
1845                                          g_param_spec_boolean ("fullscreen",
1846                                                                "Full Screen",
1847                                                                "Draw page in a fullscreen fashion",
1848                                                                FALSE,
1849                                                                G_PARAM_READWRITE));
1850         g_object_class_install_property (object_class,
1851                                          PROP_PRESENTATION,
1852                                          g_param_spec_boolean ("presentation",
1853                                                                "Presentation",
1854                                                                "Draw page in presentation mode",
1855                                                                TRUE,
1856                                                                G_PARAM_READWRITE));
1857
1858         g_object_class_install_property (object_class,
1859                                          PROP_SIZING_MODE,
1860                                          g_param_spec_enum ("sizing-mode",
1861                                                             "Sizing Mode",
1862                                                             "Sizing Mode",
1863                                                             EV_TYPE_SIZING_MODE,
1864                                                             EV_SIZING_FIT_WIDTH,
1865                                                             G_PARAM_READWRITE));
1866
1867         binding_set = gtk_binding_set_by_class (class);
1868
1869         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
1870         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
1871         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
1872         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
1873 }
1874
1875 static void
1876 ev_view_init (EvView *view)
1877 {
1878         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
1879
1880         view->spacing = 10;
1881         view->scale = 1.0;
1882         view->current_page = 0;
1883         view->pressed_button = -1;
1884         view->cursor = EV_VIEW_CURSOR_NORMAL;
1885         view->drag_info.dragging = FALSE;
1886
1887         view->continuous = TRUE;
1888         view->dual_page = FALSE;
1889         view->presentation = FALSE;
1890         view->fullscreen = FALSE;
1891         view->sizing_mode = EV_SIZING_FIT_WIDTH;
1892         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1893 }
1894
1895 /*** Callbacks ***/
1896
1897 static void
1898 find_changed_cb (EvDocument *document, int page, EvView *view)
1899 {
1900         jump_to_find_page (view);
1901         jump_to_find_result (view);
1902         update_find_status_message (view);
1903
1904         if (view->current_page == page)
1905                 gtk_widget_queue_draw (GTK_WIDGET (view));
1906 }
1907
1908 static void
1909 job_finished_cb (EvPixbufCache *pixbuf_cache,
1910                  EvView        *view)
1911 {
1912         gtk_widget_queue_draw (GTK_WIDGET (view));
1913 }
1914
1915 static void
1916 page_changed_cb (EvPageCache *page_cache,
1917                  int          new_page,
1918                  EvView      *view)
1919 {
1920         if (view->current_page != new_page) {
1921
1922                 if (view->pending_scroll != SCROLL_TO_CURRENT_PAGE) {
1923                         /* Should scroll right now */
1924                         view_scroll_to_page (view, new_page);
1925                 } else {
1926                         /* We'll scroll to new page on allocate */
1927                         view->current_page = new_page;
1928                 }
1929
1930                 if (EV_IS_DOCUMENT_FIND (view->document)) {
1931                         view->find_page = new_page;
1932                         view->find_result = 0;
1933                         update_find_status_message (view);
1934                 }
1935         }
1936 }
1937
1938 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
1939                                          EvView *view)
1940 {
1941         view_update_adjustments (view);
1942 }
1943
1944 GtkWidget*
1945 ev_view_new (void)
1946 {
1947         GtkWidget *view;
1948
1949         view = g_object_new (EV_TYPE_VIEW, NULL);
1950
1951         return view;
1952 }
1953
1954 void
1955 ev_view_set_document (EvView     *view,
1956                       EvDocument *document)
1957 {
1958         g_return_if_fail (EV_IS_VIEW (view));
1959
1960         if (document != view->document) {
1961                 if (view->document) {
1962                         g_signal_handlers_disconnect_by_func (view->document,
1963                                                               find_changed_cb,
1964                                                               view);
1965                         g_object_unref (view->document);
1966                         view->page_cache = NULL;
1967
1968                 }
1969
1970                 view->document = document;
1971                 view->find_page = 0;
1972                 view->find_result = 0;
1973
1974                 if (view->document) {
1975                         g_object_ref (view->document);
1976                         if (EV_IS_DOCUMENT_FIND (view->document)) {
1977                                 g_signal_connect (view->document,
1978                                                   "find_changed",
1979                                                   G_CALLBACK (find_changed_cb),
1980                                                   view);
1981                         }
1982                         view->page_cache = ev_document_get_page_cache (view->document);
1983                         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
1984                         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
1985                         view->pixbuf_cache = ev_pixbuf_cache_new (view->document);
1986                         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
1987                 }
1988
1989                 gtk_widget_queue_resize (GTK_WIDGET (view));
1990         }
1991 }
1992
1993 /*** Zoom and sizing mode ***/
1994
1995 #define EPSILON 0.0000001
1996 void
1997 ev_view_set_zoom (EvView   *view,
1998                   double    factor,
1999                   gboolean  relative)
2000 {
2001         double scale;
2002
2003         if (relative)
2004                 scale = view->scale * factor;
2005         else
2006                 scale = factor;
2007
2008         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
2009
2010         if (ABS (view->scale - scale) < EPSILON)
2011                 return;
2012         view->scale = scale;
2013         view->pending_resize = TRUE;
2014
2015         gtk_widget_queue_resize (GTK_WIDGET (view));
2016 }
2017
2018 double
2019 ev_view_get_zoom (EvView *view)
2020 {
2021         return view->scale;
2022 }
2023
2024 void
2025 ev_view_set_continuous (EvView   *view,
2026                         gboolean  continuous)
2027 {
2028         g_return_if_fail (EV_IS_VIEW (view));
2029
2030         continuous = continuous != FALSE;
2031
2032         if (view->continuous != continuous) {
2033                 view->continuous = continuous;
2034                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2035                 gtk_widget_queue_resize (GTK_WIDGET (view));
2036         }
2037
2038         g_object_notify (G_OBJECT (view), "continuous");
2039 }
2040
2041 void
2042 ev_view_set_dual_page (EvView   *view,
2043                        gboolean  dual_page)
2044 {
2045         g_return_if_fail (EV_IS_VIEW (view));
2046
2047         dual_page = dual_page != FALSE;
2048
2049         if (view->dual_page == dual_page)
2050                 return;
2051
2052         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2053         view->dual_page = dual_page;
2054         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2055          * preload_cache_size to be 2 if dual_page is set.
2056          */
2057         gtk_widget_queue_resize (GTK_WIDGET (view));
2058
2059         g_object_notify (G_OBJECT (view), "dual-page");
2060 }
2061
2062 void
2063 ev_view_set_fullscreen (EvView   *view,
2064                          gboolean  fullscreen)
2065 {
2066         g_return_if_fail (EV_IS_VIEW (view));
2067
2068         fullscreen = fullscreen != FALSE;
2069
2070         if (view->fullscreen != fullscreen) {
2071                 view->fullscreen = fullscreen;
2072                 gtk_widget_queue_resize (GTK_WIDGET (view));
2073         }
2074
2075         g_object_notify (G_OBJECT (view), "fullscreen");
2076 }
2077
2078 gboolean
2079 ev_view_get_fullscreen (EvView *view)
2080 {
2081         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2082
2083         return view->fullscreen;
2084 }
2085
2086 void
2087 ev_view_set_presentation (EvView   *view,
2088                           gboolean  presentation)
2089 {
2090         g_return_if_fail (EV_IS_VIEW (view));
2091
2092         presentation = presentation != FALSE;
2093
2094         if (view->presentation == presentation)
2095                 return;
2096
2097         view->presentation = presentation;
2098         gtk_widget_queue_resize (GTK_WIDGET (view));
2099         if (GTK_WIDGET_REALIZED (view)) {
2100                 if (view->presentation)
2101                         gdk_window_set_background (GTK_WIDGET(view)->window,
2102                                                    &GTK_WIDGET (view)->style->black);
2103                 else
2104                         gdk_window_set_background (GTK_WIDGET(view)->window,
2105                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
2106         }
2107
2108
2109         g_object_notify (G_OBJECT (view), "presentation");
2110 }
2111
2112 gboolean
2113 ev_view_get_presentation (EvView *view)
2114 {
2115         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2116
2117         return view->presentation;
2118 }
2119
2120 void
2121 ev_view_set_sizing_mode (EvView       *view,
2122                          EvSizingMode  sizing_mode)
2123 {
2124         g_return_if_fail (EV_IS_VIEW (view));
2125
2126         if (view->sizing_mode == sizing_mode)
2127                 return;
2128
2129         view->sizing_mode = sizing_mode;
2130         gtk_widget_queue_resize (GTK_WIDGET (view));
2131
2132         g_object_notify (G_OBJECT (view), "sizing-mode");
2133 }
2134
2135 EvSizingMode
2136 ev_view_get_sizing_mode (EvView *view)
2137 {
2138         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
2139
2140         return view->sizing_mode;
2141 }
2142
2143 gboolean
2144 ev_view_can_zoom_in (EvView *view)
2145 {
2146         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
2147 }
2148
2149 gboolean
2150 ev_view_can_zoom_out (EvView *view)
2151 {
2152         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
2153 }
2154
2155 void
2156 ev_view_zoom_in (EvView *view)
2157 {
2158         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2159
2160         view->pending_scroll = SCROLL_TO_CENTER;
2161         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
2162 }
2163
2164 void
2165 ev_view_zoom_out (EvView *view)
2166 {
2167         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2168
2169         view->pending_scroll = SCROLL_TO_CENTER;
2170         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
2171 }
2172
2173 static double
2174 zoom_for_size_fit_width (int doc_width,
2175                          int doc_height,
2176                          int target_width,
2177                          int target_height,
2178                          int vsb_width)
2179 {
2180         double scale;
2181
2182         scale = (double)target_width / doc_width;
2183
2184         if (doc_height * scale > target_height)
2185                 scale = (double) (target_width - vsb_width) / doc_width;
2186
2187         return scale;
2188 }
2189
2190 static double
2191 zoom_for_size_best_fit (int doc_width,
2192                         int doc_height,
2193                         int target_width,
2194                         int target_height,
2195                         int vsb_width,
2196                         int hsb_width)
2197 {
2198         double w_scale;
2199         double h_scale;
2200
2201         w_scale = (double)target_width / doc_width;
2202         h_scale = (double)target_height / doc_height;
2203
2204         if (doc_height * w_scale > target_height)
2205                 w_scale = (double) (target_width - vsb_width) / doc_width;
2206         if (doc_width * h_scale > target_width)
2207                 h_scale = (double) (target_height - hsb_width) / doc_height;
2208
2209         return MIN (w_scale, h_scale);
2210 }
2211
2212
2213 static void
2214 ev_view_zoom_for_size_presentation (EvView *view,
2215                                     int     width,
2216                                     int     height)
2217 {
2218         int doc_width, doc_height;
2219         gdouble scale;
2220
2221         ev_page_cache_get_size (view->page_cache,
2222                                 view->current_page,
2223                                 1.0,
2224                                 &doc_width,
2225                                 &doc_height);
2226         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
2227         ev_view_set_zoom (view, scale, FALSE);
2228 }
2229
2230 static void
2231 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
2232                            int     width,
2233                            int     height,
2234                            int     vsb_width,
2235                            int     hsb_height)
2236 {
2237         int doc_width, doc_height;
2238         GtkBorder border;
2239         gdouble scale;
2240
2241         ev_page_cache_get_max_width_size (view->page_cache,
2242                                           1.0,
2243                                           &doc_width, NULL);
2244         ev_page_cache_get_max_height_size (view->page_cache,
2245                                            1.0,
2246                                            NULL, &doc_height);
2247         compute_border (view, doc_width, doc_height, &border);
2248
2249         doc_width = doc_width * 2;
2250         width -= (2 * (border.left + border.right) + 3 * view->spacing);
2251         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2252
2253         /* FIXME: We really need to calculate the overall height here, not the
2254          * page height.  We assume there's always a vertical scrollbar for
2255          * now.  We need to fix this. */
2256         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2257                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2258         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2259                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2260         else
2261                 g_assert_not_reached ();
2262
2263         ev_view_set_zoom (view, scale, FALSE);
2264 }
2265
2266 static void
2267 ev_view_zoom_for_size_continuous (EvView *view,
2268                                   int     width,
2269                                   int     height,
2270                                   int     vsb_width,
2271                                   int     hsb_height)
2272 {
2273         int doc_width, doc_height;
2274         GtkBorder border;
2275         gdouble scale;
2276
2277         ev_page_cache_get_max_width_size (view->page_cache,
2278                                           1.0,
2279                                           &doc_width, NULL);
2280         ev_page_cache_get_max_height_size (view->page_cache,
2281                                            1.0,
2282                                            NULL, &doc_height);
2283         compute_border (view, doc_width, doc_height, &border);
2284
2285         width -= (border.left + border.right + 2 * view->spacing);
2286         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2287
2288         /* FIXME: We really need to calculate the overall height here, not the
2289          * page height.  We assume there's always a vertical scrollbar for
2290          * now.  We need to fix this. */
2291         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2292                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2293         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2294                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2295         else
2296                 g_assert_not_reached ();
2297
2298         ev_view_set_zoom (view, scale, FALSE);
2299 }
2300
2301 static void
2302 ev_view_zoom_for_size_dual_page (EvView *view,
2303                                  int     width,
2304                                  int     height,
2305                                  int     vsb_width,
2306                                  int     hsb_height)
2307 {
2308         GtkBorder border;
2309         gint doc_width, doc_height;
2310         gdouble scale;
2311         gint other_page;
2312
2313         other_page = view->current_page ^ 1;
2314
2315         /* Find the largest of the two. */
2316         ev_page_cache_get_size (view->page_cache,
2317                                 view->current_page,
2318                                 1.0,
2319                                 &doc_width, &doc_height);
2320
2321         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
2322                 gint width_2, height_2;
2323                 ev_page_cache_get_size (view->page_cache,
2324                                         other_page,
2325                                         1.0,
2326                                         &width_2, &height_2);
2327                 if (width_2 > doc_width)
2328                         doc_width = width_2;
2329                 if (height_2 > doc_height)
2330                         doc_height = height_2;
2331         }
2332         compute_border (view, doc_width, doc_height, &border);
2333
2334         doc_width = doc_width * 2;
2335         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
2336         height -= (border.top + border.bottom + 2 * view->spacing);
2337
2338         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2339                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2340         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2341                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2342         else
2343                 g_assert_not_reached ();
2344
2345         ev_view_set_zoom (view, scale, FALSE);
2346 }
2347
2348 static void
2349 ev_view_zoom_for_size_single_page (EvView *view,
2350                                    int     width,
2351                                    int     height,
2352                                    int     vsb_width,
2353                                    int     hsb_height)
2354 {
2355         int doc_width, doc_height;
2356         GtkBorder border;
2357         gdouble scale;
2358
2359         ev_page_cache_get_size (view->page_cache,
2360                                 view->current_page,
2361                                 1.0,
2362                                 &doc_width,
2363                                 &doc_height);
2364         /* Get an approximate border */
2365         compute_border (view, width, height, &border);
2366
2367         width -= (border.left + border.right + 2 * view->spacing);
2368         height -= (border.top + border.bottom + 2 * view->spacing);
2369
2370         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2371                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2372         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2373                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2374         else
2375                 g_assert_not_reached ();
2376
2377         ev_view_set_zoom (view, scale, FALSE);
2378 }
2379
2380 void
2381 ev_view_set_zoom_for_size (EvView *view,
2382                            int     width,
2383                            int     height,
2384                            int     vsb_width,
2385                            int     hsb_height)
2386 {
2387         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2388                           view->sizing_mode == EV_SIZING_BEST_FIT);
2389         g_return_if_fail (width >= 0);
2390         g_return_if_fail (height >= 0);
2391
2392         if (view->document == NULL)
2393                 return;
2394
2395         if (view->presentation)
2396                 ev_view_zoom_for_size_presentation (view, width, height);
2397         else if (view->continuous && view->dual_page)
2398                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
2399         else if (view->continuous)
2400                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
2401         else if (view->dual_page)
2402                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
2403         else
2404                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
2405 }
2406
2407 /*** Status text messages ***/
2408
2409 const char *
2410 ev_view_get_status (EvView *view)
2411 {
2412         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2413
2414         return view->status;
2415 }
2416
2417 static void
2418 ev_view_set_status (EvView *view, const char *message)
2419 {
2420         g_return_if_fail (EV_IS_VIEW (view));
2421
2422         if (message != view->status) {
2423                 g_free (view->status);
2424                 view->status = g_strdup (message);
2425                 g_object_notify (G_OBJECT (view), "status");
2426         }
2427 }
2428
2429 static void
2430 update_find_status_message (EvView *view)
2431 {
2432         char *message;
2433
2434         if (view->current_page == view->find_page) {
2435                 int results;
2436
2437                 results = ev_document_find_get_n_results
2438                                 (EV_DOCUMENT_FIND (view->document),
2439                                  view->current_page);
2440                 /* TRANS: Sometimes this could be better translated as
2441                    "%d hit(s) on this page".  Therefore this string
2442                    contains plural cases. */
2443                 message = g_strdup_printf (ngettext ("%d found on this page",
2444                                                      "%d found on this page",
2445                                                      results),
2446                                            results);
2447         } else {
2448                 double percent;
2449
2450                 ev_document_doc_mutex_lock ();
2451                 percent = ev_document_find_get_progress
2452                                 (EV_DOCUMENT_FIND (view->document));
2453                 ev_document_doc_mutex_unlock ();
2454                 if (percent >= (1.0 - 1e-10)) {
2455                         message = g_strdup (_("Not found"));
2456                 } else {
2457                         message = g_strdup_printf (_("%3d%% remaining to search"),
2458                                                    (int) ((1.0 - percent) * 100));
2459                 }
2460
2461         }
2462         ev_view_set_find_status (view, message);
2463 }
2464
2465 const char *
2466 ev_view_get_find_status (EvView *view)
2467 {
2468         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2469
2470         return view->find_status;
2471 }
2472
2473 static void
2474 ev_view_set_find_status (EvView *view, const char *message)
2475 {
2476         g_return_if_fail (EV_IS_VIEW (view));
2477
2478         g_free (view->find_status);
2479         view->find_status = g_strdup (message);
2480         g_object_notify (G_OBJECT (view), "find-status");
2481 }
2482
2483 /*** Find ***/
2484
2485 static void
2486 jump_to_find_result (EvView *view)
2487 {
2488         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2489         EvRectangle rect;
2490         GdkRectangle view_rect;
2491         int n_results;
2492         int page = view->find_page;
2493
2494         ev_document_doc_mutex_lock ();
2495         n_results = ev_document_find_get_n_results (find, page);
2496         ev_document_doc_mutex_unlock ();
2497
2498         if (n_results > view->find_result) {
2499                 ev_document_doc_mutex_lock ();
2500                 ev_document_find_get_result
2501                         (find, page, view->find_result, &rect);
2502                 ev_document_doc_mutex_unlock ();
2503
2504                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
2505                 ensure_rectangle_is_visible (view, &view_rect);
2506         }
2507 }
2508
2509 static void
2510 jump_to_find_page (EvView *view)
2511 {
2512         int n_pages, i;
2513
2514         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2515
2516         for (i = 0; i < n_pages; i++) {
2517                 int has_results;
2518                 int page;
2519
2520                 page = i + view->find_page;
2521                 if (page >= n_pages) {
2522                         page = page - n_pages;
2523                 }
2524
2525                 has_results = ev_document_find_page_has_results
2526                                 (EV_DOCUMENT_FIND (view->document), page);
2527                 if (has_results == -1) {
2528                         view->find_page = page;
2529                         break;
2530                 } else if (has_results == 1) {
2531                         ev_page_cache_set_current_page (view->page_cache, page);
2532                         jump_to_find_result (view);
2533                         break;
2534                 }
2535         }
2536 }
2537
2538 gboolean
2539 ev_view_can_find_next (EvView *view)
2540 {
2541         int n_results = 0;
2542
2543         if (EV_IS_DOCUMENT_FIND (view->document)) {
2544                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2545
2546                 ev_document_doc_mutex_lock ();
2547                 n_results = ev_document_find_get_n_results (find, view->current_page);
2548                 ev_document_doc_mutex_unlock ();
2549         }
2550
2551         return n_results > 0;
2552 }
2553
2554 void
2555 ev_view_find_next (EvView *view)
2556 {
2557         EvPageCache *page_cache;
2558         int n_results, n_pages;
2559         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2560
2561         page_cache = ev_document_get_page_cache (view->document);
2562         ev_document_doc_mutex_lock ();
2563         n_results = ev_document_find_get_n_results (find, view->current_page);
2564         ev_document_doc_mutex_unlock ();
2565
2566         n_pages = ev_page_cache_get_n_pages (page_cache);
2567
2568         view->find_result++;
2569
2570         if (view->find_result >= n_results) {
2571                 view->find_result = 0;
2572                 view->find_page++;
2573
2574                 if (view->find_page >= n_pages) {
2575                         view->find_page = 0;
2576                 }
2577
2578                 jump_to_find_page (view);
2579         } else {
2580                 jump_to_find_result (view);
2581                 gtk_widget_queue_draw (GTK_WIDGET (view));
2582         }
2583 }
2584
2585 void
2586 ev_view_find_previous (EvView *view)
2587 {
2588         int n_results, n_pages;
2589         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2590         EvPageCache *page_cache;
2591
2592         page_cache = ev_document_get_page_cache (view->document);
2593
2594         ev_document_doc_mutex_lock ();
2595         n_results = ev_document_find_get_n_results (find, view->current_page);
2596         ev_document_doc_mutex_unlock ();
2597
2598         n_pages = ev_page_cache_get_n_pages (page_cache);
2599
2600         view->find_result--;
2601
2602         if (view->find_result < 0) {
2603                 view->find_result = 0;
2604                 view->find_page--;
2605
2606                 if (view->find_page < 0) {
2607                         view->find_page = n_pages - 1;
2608                 }
2609
2610                 jump_to_find_page (view);
2611         } else {
2612                 jump_to_find_result (view);
2613                 gtk_widget_queue_draw (GTK_WIDGET (view));
2614         }
2615 }
2616
2617 /*** Selections ***/
2618
2619 static void
2620 compute_selections (EvView *view, GdkRectangle *view_rect)
2621 {
2622         int n_pages, i;
2623
2624         clear_selection (view);
2625
2626         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2627         for (i = 0; i < n_pages; i++) {
2628                 GdkRectangle page_area;
2629                 GtkBorder border;
2630
2631                 if (get_page_extents (view, i, &page_area, &border)) {
2632                         GdkRectangle overlap;
2633
2634                         if (gdk_rectangle_intersect (&page_area, view_rect, &overlap)) {
2635                                 EvViewSelection *selection;
2636
2637                                 selection = g_new0 (EvViewSelection, 1);
2638                                 selection->page = i;
2639                                 view_rect_to_doc_rect (view, &overlap, &page_area,
2640                                                        &(selection->rect));
2641
2642                                 view->selections = g_list_append
2643                                                 (view->selections, selection);
2644                         }
2645                 }
2646         }
2647 }
2648
2649 static void
2650 clear_selection (EvView *view)
2651 {
2652         g_list_foreach (view->selections, (GFunc)g_free, NULL);
2653         view->selections = NULL;
2654 }
2655
2656
2657 void
2658 ev_view_select_all (EvView *view)
2659 {
2660         int n_pages, i;
2661
2662         clear_selection (view);
2663
2664         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2665         for (i = 0; i < n_pages; i++) {
2666                 int width, height;
2667                 EvViewSelection *selection;
2668
2669                 ev_page_cache_get_size (view->page_cache,
2670                                         i, 1.0, &width, &height);
2671
2672                 selection = g_new0 (EvViewSelection, 1);
2673                 selection->page = i;
2674                 selection->rect.x1 = selection->rect.y1 = 0;
2675                 selection->rect.x2 = width;
2676                 selection->rect.y2 = height;
2677
2678                 view->selections = g_list_append (view->selections, selection);
2679         }
2680
2681         gtk_widget_queue_draw (GTK_WIDGET (view));
2682 }
2683
2684 static char *
2685 get_selected_text (EvView *ev_view)
2686 {
2687         GString *text;
2688         GList *l;
2689
2690         text = g_string_new (NULL);
2691
2692         ev_document_doc_mutex_lock ();
2693
2694         for (l = ev_view->selections; l != NULL; l = l->next) {
2695                 EvViewSelection *selection = (EvViewSelection *)l->data;
2696                 char *tmp;
2697
2698                 tmp = ev_document_get_text (ev_view->document,
2699                                             selection->page,
2700                                             &selection->rect);
2701                 g_string_append (text, tmp);
2702                 g_free (tmp);
2703         }
2704
2705         ev_document_doc_mutex_unlock ();
2706
2707         return g_string_free (text, FALSE);
2708 }
2709
2710 void
2711 ev_view_copy (EvView *ev_view)
2712 {
2713         GtkClipboard *clipboard;
2714         char *text;
2715
2716         if (!ev_document_can_get_text (ev_view->document)) {
2717                 return;
2718         }
2719
2720         text = get_selected_text (ev_view);
2721         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
2722                                               GDK_SELECTION_CLIPBOARD);
2723         gtk_clipboard_set_text (clipboard, text, -1);
2724         g_free (text);
2725 }
2726
2727 static void
2728 ev_view_primary_get_cb (GtkClipboard     *clipboard,
2729                         GtkSelectionData *selection_data,
2730                         guint             info,
2731                         gpointer          data)
2732 {
2733         EvView *ev_view = EV_VIEW (data);
2734         char *text;
2735
2736         if (!ev_document_can_get_text (ev_view->document)) {
2737                 return;
2738         }
2739
2740         text = get_selected_text (ev_view);
2741         gtk_selection_data_set_text (selection_data, text, -1);
2742         g_free (text);
2743 }
2744
2745 static void
2746 ev_view_primary_clear_cb (GtkClipboard *clipboard,
2747                           gpointer      data)
2748 {
2749         EvView *view = EV_VIEW (data);
2750
2751         clear_selection (view);
2752 }
2753
2754 static void
2755 ev_view_update_primary_selection (EvView *ev_view)
2756 {
2757         GtkClipboard *clipboard;
2758
2759         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
2760                                               GDK_SELECTION_PRIMARY);
2761
2762         if (ev_view->selections) {
2763                 if (!gtk_clipboard_set_with_owner (clipboard,
2764                                                    targets,
2765                                                    G_N_ELEMENTS (targets),
2766                                                    ev_view_primary_get_cb,
2767                                                    ev_view_primary_clear_cb,
2768                                                    G_OBJECT (ev_view)))
2769                         ev_view_primary_clear_cb (clipboard, ev_view);
2770         } else {
2771                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
2772                         gtk_clipboard_clear (clipboard);
2773         }
2774 }
2775
2776 /*** Cursor operations ***/
2777
2778 static GdkCursor *
2779 ev_view_create_invisible_cursor(void)
2780 {
2781        GdkBitmap *empty;
2782        GdkColor black = { 0, 0, 0, 0 };
2783        static char bits[] = { 0x00 };
2784
2785        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
2786
2787        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
2788 }
2789
2790 static void
2791 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
2792 {
2793         GdkCursor *cursor = NULL;
2794         GdkDisplay *display;
2795         GtkWidget *widget;
2796
2797         if (view->cursor == new_cursor) {
2798                 return;
2799         }
2800
2801         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
2802         display = gtk_widget_get_display (widget);
2803         view->cursor = new_cursor;
2804
2805         switch (new_cursor) {
2806                 case EV_VIEW_CURSOR_NORMAL:
2807                         gdk_window_set_cursor (widget->window, NULL);
2808                         break;
2809                 case EV_VIEW_CURSOR_LINK:
2810                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
2811                         break;
2812                 case EV_VIEW_CURSOR_WAIT:
2813                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
2814                         break;
2815                 case EV_VIEW_CURSOR_HIDDEN:
2816                         cursor = ev_view_create_invisible_cursor ();
2817                         break;
2818                 case EV_VIEW_CURSOR_DRAG:
2819                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
2820                         break;
2821         }
2822
2823         if (cursor) {
2824                 gdk_window_set_cursor (widget->window, cursor);
2825                 gdk_cursor_unref (cursor);
2826                 gdk_flush();
2827         }
2828 }
2829
2830 void
2831 ev_view_hide_cursor (EvView *view)
2832 {
2833        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
2834 }
2835
2836 void
2837 ev_view_show_cursor (EvView *view)
2838 {
2839        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
2840 }
2841
2842 /*** Enum description for usage in signal ***/
2843
2844 GType
2845 ev_sizing_mode_get_type (void)
2846 {
2847   static GType etype = 0;
2848   if (etype == 0) {
2849     static const GEnumValue values[] = {
2850       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
2851       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
2852       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
2853       { 0, NULL, NULL }
2854     };
2855     etype = g_enum_register_static ("EvSizingMode", values);
2856   }
2857   return etype;
2858 }
2859