shell/ev-view.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *  Copyright (C) 2004 Red Hat, Inc
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include <math.h>
  22 #include <gtk/gtkalignment.h>
  23 #include <glib/gi18n.h>
  24 #include <gtk/gtkbindings.h>
  25 #include <gtk/gtkselection.h>
  26 #include <gtk/gtkclipboard.h>
  27 #include <gdk/gdkkeysyms.h>
  28 #include <libgnomevfs/gnome-vfs-utils.h>
  29
  30 #include "ev-marshal.h"
  31 #include "ev-view.h"
  32 #include "ev-document-find.h"
  33 #include "ev-document-misc.h"
  34 #include "ev-debug.h"
  35 #include "ev-job-queue.h"
  36 #include "ev-page-cache.h"
  37 #include "ev-pixbuf-cache.h"
  38
  39 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  40 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  41 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  42
  43 enum {
  44         PROP_0,
  45         PROP_STATUS,
  46         PROP_FIND_STATUS,
  47         PROP_CONTINUOUS,
  48         PROP_DUAL_PAGE,
  49         PROP_FULLSCREEN,
  50         PROP_PRESENTATION,
  51         PROP_SIZING_MODE,
  52         PROP_ZOOM,
  53 };
  54
  55 enum {
  56         SIGNAL_SCROLL_VIEW,
  57         SIGNAL_ZOOM_INVALID,
  58         N_SIGNALS,
  59 };
  60
  61 enum {
  62         TARGET_STRING,
  63         TARGET_TEXT,
  64         TARGET_COMPOUND_TEXT,
  65         TARGET_UTF8_STRING,
  66         TARGET_TEXT_BUFFER_CONTENTS
  67 };
  68
  69 static const GtkTargetEntry targets[] = {
  70         { "STRING", 0, TARGET_STRING },
  71         { "TEXT",   0, TARGET_TEXT },
  72         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  73         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  74 };
  75
  76 static guint signals[N_SIGNALS];
  77
  78 typedef enum {
  79         EV_VIEW_CURSOR_NORMAL,
  80         EV_VIEW_CURSOR_LINK,
  81         EV_VIEW_CURSOR_WAIT,
  82         EV_VIEW_CURSOR_HIDDEN,
  83         EV_VIEW_CURSOR_DRAG
  84 } EvViewCursor;
  85
  86 #define ZOOM_IN_FACTOR  1.2
  87 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  88
  89 #define MIN_SCALE 0.05409
  90 #define MAX_SCALE 4.0
  91
  92 typedef struct {
  93         EvRectangle rect;
  94         int page;
  95 } EvViewSelection;
  96
  97 typedef struct {
  98         gboolean dragging;
  99         GdkPoint start;
 100         gdouble hadj;
 101         gdouble vadj;
 102 } DragInfo;
 103
 104 typedef enum {
 105         SCROLL_TO_KEEP_POSITION,
 106         SCROLL_TO_CURRENT_PAGE,
 107         SCROLL_TO_CENTER
 108 } PendingScroll;
 109
 110 struct _EvView {
 111         GtkWidget parent_instance;
 112
 113         EvDocument *document;
 114
 115         char *status;
 116         char *find_status;
 117
 118         gint scroll_x;
 119         gint scroll_y;
 120
 121         DragInfo drag_info;
 122         gboolean pressed_button;
 123         GdkPoint selection_start;
 124         GList *selections;
 125         EvViewCursor cursor;
 126
 127         GtkAdjustment *hadjustment;
 128         GtkAdjustment *vadjustment;
 129
 130         EvPageCache *page_cache;
 131         EvPixbufCache *pixbuf_cache;
 132
 133         gint start_page;
 134         gint end_page;
 135         gint current_page;
 136
 137         EvJobRender *current_job;
 138
 139         int find_page;
 140         int find_result;
 141         int spacing;
 142
 143         double scale;
 144
 145         gboolean continuous;
 146         gboolean dual_page;
 147         gboolean fullscreen;
 148         gboolean presentation;
 149         EvSizingMode sizing_mode;
 150
 151         PendingScroll pending_scroll;
 152         gboolean pending_resize;
 153 };
 154
 155 struct _EvViewClass {
 156         GtkWidgetClass parent_class;
 157
 158         void    (*set_scroll_adjustments) (EvView         *view,
 159                                            GtkAdjustment  *hadjustment,
 160                                            GtkAdjustment  *vadjustment);
 161         void    (*scroll_view)            (EvView         *view,
 162                                            GtkScrollType   scroll,
 163                                            gboolean        horizontal);
 164         void    (*zoom_invalid)           (EvView         *view);
 165 };
 166
 167 /*** Scrolling ***/
 168 static void       scroll_to_current_page                     (EvView *view,
 169                                                               GtkOrientation orientation);
 170 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 171                                                               GtkAdjustment      *hadjustment,
 172                                                               GtkAdjustment      *vadjustment);
 173 static void       view_update_range_and_current_page         (EvView             *view);
 174 static void       set_scroll_adjustment                      (EvView             *view,
 175                                                               GtkOrientation      orientation,
 176                                                               GtkAdjustment      *adjustment);
 177 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 178                                                               GtkAdjustment      *hadjustment,
 179                                                               GtkAdjustment      *vadjustment);
 180 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 181                                                               guint               keyval,
 182                                                               GtkScrollType       scroll,
 183                                                               gboolean            horizontal);
 184 static void       ev_view_scroll_view                        (EvView             *view,
 185                                                               GtkScrollType       scroll,
 186                                                               gboolean            horizontal);
 187 static void       ensure_rectangle_is_visible                (EvView             *view,
 188                                                               GdkRectangle       *rect);
 189
 190 /*** Geometry computations ***/
 191 static void       compute_border                             (EvView             *view,
 192                                                               int                 width,
 193                                                               int                 height,
 194                                                               GtkBorder          *border);
 195 static void       get_page_y_offset                          (EvView *view,
 196                                                               int page,
 197                                                               double zoom,
 198                                                               int *y_offset);
 199 static gboolean   get_page_extents                           (EvView             *view,
 200                                                               gint                page,
 201                                                               GdkRectangle       *page_area,
 202                                                               GtkBorder          *border);
 203 static void       view_rect_to_doc_rect                      (EvView             *view,
 204                                                               GdkRectangle       *view_rect,
 205                                                               GdkRectangle       *page_area,
 206                                                               EvRectangle        *doc_rect);
 207 static void       doc_rect_to_view_rect                      (EvView             *view,
 208                                                               int                 page,
 209                                                               EvRectangle        *doc_rect,
 210                                                               GdkRectangle       *view_rect);
 211 static void       find_page_at_location                      (EvView             *view,
 212                                                               gdouble             x,
 213                                                               gdouble             y,
 214                                                               gint               *page,
 215                                                               gint               *x_offset,
 216                                                               gint               *y_offset);
 217
 218 /*** Hyperrefs ***/
 219 static EvLink*    get_link_at_location                       (EvView             *view,
 220                                                               gdouble             x,
 221                                                               gdouble             y);
 222 static void       go_to_link                                 (EvView             *view,
 223                                                               EvLink             *link);
 224 static char*      status_message_from_link                   (EvView             *view,
 225                                                               EvLink             *link);
 226
 227 /*** GtkWidget implementation ***/
 228 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 229                                                               GtkRequisition     *requisition);
 230 static void       ev_view_size_request_continuous            (EvView             *view,
 231                                                               GtkRequisition     *requisition);
 232 static void       ev_view_size_request_dual_page             (EvView             *view,
 233                                                               GtkRequisition     *requisition);
 234 static void       ev_view_size_request_single_page           (EvView             *view,
 235                                                               GtkRequisition     *requisition);
 236 static void       ev_view_size_request                       (GtkWidget          *widget,
 237                                                               GtkRequisition     *requisition);
 238 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 239                                                               GtkAllocation      *allocation);
 240 static void       ev_view_realize                            (GtkWidget          *widget);
 241 static void       ev_view_unrealize                          (GtkWidget          *widget);
 242 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 243                                                               GdkEventScroll     *event);
 244 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 245                                                               GdkEventExpose     *event);
 246 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 247                                                               GdkEventButton     *event);
 248 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 249                                                               GdkEventMotion     *event);
 250 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 251                                                               GdkEventButton     *event);
 252
 253 /*** Drawing ***/
 254 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 255 static void       draw_rubberband                            (GtkWidget          *widget,
 256                                                               GdkWindow          *window,
 257                                                               const GdkRectangle *rect,
 258                                                               guchar              alpha);
 259 static void       highlight_find_results                     (EvView             *view,
 260                                                               int                 page);
 261 static void       draw_one_page                              (EvView             *view,
 262                                                               gint                page,
 263                                                               GdkRectangle       *page_area,
 264                                                               GtkBorder          *border,
 265                                                               GdkRectangle       *expose_area);
 266
 267 /*** Callbacks ***/
 268 static void       find_changed_cb                            (EvDocument         *document,
 269                                                               int                 page,
 270                                                               EvView             *view);
 271 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 272                                                               EvView             *view);
 273 static void       page_changed_cb                            (EvPageCache        *page_cache,
 274                                                               int                 new_page,
 275                                                               EvView             *view);
 276 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 277                                                               EvView             *view);
 278
 279 /*** GObject ***/
 280 static void       ev_view_finalize                           (GObject            *object);
 281 static void       ev_view_destroy                            (GtkObject          *object);
 282 static void       ev_view_set_property                       (GObject            *object,
 283                                                               guint               prop_id,
 284                                                               const GValue       *value,
 285                                                               GParamSpec         *pspec);
 286 static void       ev_view_get_property                       (GObject            *object,
 287                                                               guint               prop_id,
 288                                                               GValue             *value,
 289                                                               GParamSpec         *pspec);
 290 static void       ev_view_class_init                         (EvViewClass        *class);
 291 static void       ev_view_init                               (EvView             *view);
 292
 293 /*** Zoom and sizing ***/
 294 static double   zoom_for_size_fit_width                      (int doc_width,
 295                                                               int doc_height,
 296                                                               int target_width,
 297                                                               int target_height,
 298                                                               int vsb_width);
 299 static double   zoom_for_size_best_fit                       (int doc_width,
 300                                                               int doc_height,
 301                                                               int target_width,
 302                                                               int target_height,
 303                                                               int vsb_width,
 304                                                               int hsb_width);
 305 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 306                                                               int     width,
 307                                                               int     height);
 308 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 309                                                                 int     width,
 310                                                                 int     height,
 311                                                                 int     vsb_width,
 312                                                                 int     hsb_height);
 313 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 314                                                                 int     width,
 315                                                                 int     height,
 316                                                                 int     vsb_width,
 317                                                                 int     hsb_height);
 318 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 319                                                                 int     width,
 320                                                                 int     height,
 321                                                                 int     vsb_width,
 322                                                                 int     hsb_height);
 323 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 324                                                                 int     width,
 325                                                                 int     height,
 326                                                                 int     vsb_width,
 327                                                                 int     hsb_height);
 328 /*** Cursors ***/
 329 static GdkCursor* ev_view_create_invisible_cursor            (void);
 330 static void       ev_view_set_cursor                         (EvView             *view,
 331                                                               EvViewCursor        new_cursor);
 332
 333 /*** Status messages ***/
 334 static void       ev_view_set_status                         (EvView             *view,
 335                                                               const char         *message);
 336 static void       update_find_status_message                 (EvView             *view);
 337 static void       ev_view_set_find_status                    (EvView             *view,
 338                                                               const char         *message);
 339 /*** Find ***/
 340 static void       jump_to_find_result                        (EvView             *view);
 341 static void       jump_to_find_page                          (EvView             *view);
 342
 343 /*** Selection ***/
 344 static void       compute_selections                         (EvView             *view,
 345                                                               GdkRectangle       *view_rect);
 346 static void       clear_selection                            (EvView             *view);
 347 static char*      get_selected_text                          (EvView             *ev_view);
 348 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 349                                                               GtkSelectionData   *selection_data,
 350                                                               guint               info,
 351                                                               gpointer            data);
 352 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 353                                                               gpointer            data);
 354 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 355
 356
 357 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 358
 359 static void
 360 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 361 {
 362         GdkRectangle page_area;
 363         GtkBorder border;
 364
 365         get_page_extents (view, view->current_page, &page_area, &border);
 366
 367         if (orientation == GTK_ORIENTATION_VERTICAL) {
 368                 if (view->continuous) {
 369                         gtk_adjustment_clamp_page (view->vadjustment,
 370                                                    page_area.y - view->spacing,
 371                                                    page_area.y + view->vadjustment->page_size);
 372                 } else {
 373                         gtk_adjustment_set_value (view->vadjustment,
 374                                                   view->vadjustment->lower);
 375                 }
 376         } else {
 377                 if (view->dual_page) {
 378                         gtk_adjustment_clamp_page (view->hadjustment,
 379                                                    page_area.x,
 380                                                    page_area.x + view->hadjustment->page_size);
 381                 } else {
 382                         gtk_adjustment_set_value (view->hadjustment,
 383                                                   CLAMP (view->hadjustment->value,
 384                                                   view->hadjustment->lower,
 385                                                   view->hadjustment->upper -
 386                                                   view->hadjustment->page_size));
 387                 }
 388         }
 389 }
 390
 391 static void
 392 view_set_adjustment_values (EvView         *view,
 393                             GtkOrientation  orientation)
 394 {
 395         GtkWidget *widget = GTK_WIDGET (view);
 396         GtkAdjustment *adjustment;
 397         int requisition;
 398         int allocation;
 399
 400         double factor;
 401         gint new_value;
 402
 403         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 404                 requisition = widget->requisition.width;
 405                 allocation = widget->allocation.width;
 406                 adjustment = view->hadjustment;
 407         } else {
 408                 requisition = widget->requisition.height;
 409                 allocation = widget->allocation.height;
 410                 adjustment = view->vadjustment;
 411         }
 412
 413         if (!adjustment)
 414                 return;
 415
 416         factor = 1.0;
 417         switch (view->pending_scroll) {
 418                 case SCROLL_TO_KEEP_POSITION:
 419                         factor = (adjustment->value) / adjustment->upper;
 420                         break;
 421                 case SCROLL_TO_CURRENT_PAGE:
 422                         break;
 423                 case SCROLL_TO_CENTER:
 424                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 425                         break;
 426         }
 427
 428         adjustment->page_size = allocation;
 429         adjustment->step_increment = allocation * 0.1;
 430         adjustment->page_increment = allocation * 0.9;
 431         adjustment->lower = 0;
 432         adjustment->upper = MAX (allocation, requisition);
 433
 434         /*
 435          * We add 0.5 to the values before to average out our rounding errors.
 436          */
 437         switch (view->pending_scroll) {
 438                 case SCROLL_TO_KEEP_POSITION:
 439                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 440                         gtk_adjustment_set_value (adjustment, (int)new_value);
 441                         break;
 442                 case SCROLL_TO_CURRENT_PAGE:
 443                         scroll_to_current_page (view, orientation);
 444                         break;
 445                 case SCROLL_TO_CENTER:
 446                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 447                                            0, adjustment->upper - adjustment->page_size);
 448                         gtk_adjustment_set_value (adjustment, (int)new_value);
 449                         break;
 450         }
 451
 452         gtk_adjustment_changed (adjustment);
 453 }
 454
 455 static void
 456 view_update_range_and_current_page (EvView *view)
 457 {
 458         /* Presentation trumps all other modes */
 459         if (view->presentation) {
 460                 view->start_page = view->current_page;
 461                 view->end_page = view->current_page;
 462         } else if (view->continuous) {
 463                 GdkRectangle current_area, unused, page_area;
 464                 GtkBorder border;
 465                 gint current_page;
 466                 gboolean found = FALSE;
 467                 int i;
 468
 469                 if (!(view->vadjustment && view->hadjustment))
 470                         return;
 471
 472                 current_area.x = view->hadjustment->value;
 473                 current_area.width = view->hadjustment->upper;
 474                 current_area.y = view->vadjustment->value;
 475                 current_area.height = view->vadjustment->page_size;
 476
 477                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 478
 479                         get_page_extents (view, i, &page_area, &border);
 480
 481                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 482                                 if (! found) {
 483                                         view->start_page = i;
 484                                         found = TRUE;
 485
 486                                 }
 487                                 view->end_page = i;
 488                         } else if (found) {
 489                                 break;
 490                         }
 491                 }
 492
 493                 current_page = ev_page_cache_get_current_page (view->page_cache);
 494
 495                 if (current_page < view->start_page || current_page > view->end_page) {
 496                         view->current_page = view->start_page;
 497                         ev_page_cache_set_current_page (view->page_cache, view->start_page);
 498                 }
 499         } else {
 500                 if (view->dual_page) {
 501                         if (view->current_page % 2 == 0) {
 502                                 view->start_page = view->current_page;
 503                                 if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 504                                         view->end_page = view->start_page + 1;
 505                         } else {
 506                                 view->start_page = view->current_page - 1;
 507                                 view->end_page = view->current_page;
 508                         }
 509                 } else {
 510                         view->start_page = view->current_page;
 511                         view->end_page = view->current_page;
 512                 }
 513         }
 514
 515         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 516                                         view->start_page,
 517                                         view->end_page,
 518                                         view->scale);
 519 }
 520
 521 static void
 522 set_scroll_adjustment (EvView *view,
 523                        GtkOrientation  orientation,
 524                        GtkAdjustment  *adjustment)
 525 {
 526         GtkAdjustment **to_set;
 527
 528         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 529                 to_set = &view->hadjustment;
 530         else
 531                 to_set = &view->vadjustment;
 532
 533         if (*to_set != adjustment) {
 534                 if (*to_set) {
 535                         g_signal_handlers_disconnect_by_func (*to_set,
 536                                                               (gpointer) on_adjustment_value_changed,
 537                                                               view);
 538                         g_object_unref (*to_set);
 539                 }
 540
 541                 *to_set = adjustment;
 542                 view_set_adjustment_values (view, orientation);
 543
 544                 if (*to_set) {
 545                         g_object_ref (*to_set);
 546                         g_signal_connect (*to_set, "value_changed",
 547                                           G_CALLBACK (on_adjustment_value_changed), view);
 548                 }
 549         }
 550 }
 551
 552 static void
 553 ev_view_set_scroll_adjustments (EvView *view,
 554                                 GtkAdjustment  *hadjustment,
 555                                 GtkAdjustment  *vadjustment)
 556 {
 557         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 558         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 559
 560         on_adjustment_value_changed (NULL, view);
 561 }
 562
 563 static void
 564 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 565                            guint           keyval,
 566                            GtkScrollType   scroll,
 567                            gboolean        horizontal)
 568 {
 569   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 570
 571   gtk_binding_entry_add_signal (binding_set, keyval, 0,
 572                                 "scroll_view", 2,
 573                                 GTK_TYPE_SCROLL_TYPE, scroll,
 574                                 G_TYPE_BOOLEAN, horizontal);
 575   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
 576                                 "scroll_view", 2,
 577                                 GTK_TYPE_SCROLL_TYPE, scroll,
 578                                 G_TYPE_BOOLEAN, horizontal);
 579 }
 580
 581 void
 582 ev_view_scroll (EvView        *view,
 583                 EvScrollType   scroll)
 584 {
 585         GtkAdjustment *adjustment;
 586         double value, increment;
 587         gboolean first_page = FALSE;
 588         gboolean last_page = FALSE;
 589
 590         /* Assign values for increment and vertical adjustment */
 591         adjustment = view->vadjustment;
 592         increment = adjustment->page_size * 0.75;
 593         value = adjustment->value;
 594
 595         /* Assign boolean for first and last page */
 596         if (view->current_page == 0)
 597                 first_page = TRUE;
 598         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 599                 last_page = TRUE;
 600
 601         switch (scroll) {
 602                 case EV_SCROLL_PAGE_BACKWARD:
 603                         /* Do not jump backwards if at the first page */
 604                         if (value == (adjustment->lower) && first_page) {
 605                                 /* Do nothing */
 606                                 /* At the top of a page, assign the upper bound limit of previous page */
 607                         } else if (value == (adjustment->lower)) {
 608                                 value = adjustment->upper - adjustment->page_size;
 609                                 ev_page_cache_set_current_page (view->page_cache, view->current_page - 1);
 610                                 /* Jump to the top */
 611                         } else {
 612                                 value = MAX (value - increment, adjustment->lower);
 613                         }
 614                         break;
 615                 case EV_SCROLL_PAGE_FORWARD:
 616                         /* Do not jump forward if at the last page */
 617                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 618                                 /* Do nothing */
 619                         /* At the bottom of a page, assign the lower bound limit of next page */
 620                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 621                                 value = 0;
 622                                 ev_page_cache_set_current_page (view->page_cache, view->current_page + 1);
 623                         /* Jump to the bottom */
 624                         } else {
 625                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 626                         }
 627                         break;
 628                 default:
 629                         break;
 630         }
 631
 632         gtk_adjustment_set_value (adjustment, value);
 633 }
 634
 635 static void
 636 ev_view_scroll_view (EvView *view,
 637                      GtkScrollType scroll,
 638                      gboolean horizontal)
 639 {
 640         GtkAdjustment *adjustment;
 641         double value;
 642
 643         if (horizontal) {
 644                 adjustment = view->hadjustment;
 645         } else {
 646                 adjustment = view->vadjustment;
 647         }
 648
 649         value = adjustment->value;
 650
 651         switch (scroll) {
 652                 case GTK_SCROLL_STEP_BACKWARD:
 653                         value -= adjustment->step_increment;
 654                         break;
 655                 case GTK_SCROLL_STEP_FORWARD:
 656                         value += adjustment->step_increment;
 657                         break;
 658                 default:
 659                         break;
 660         }
 661
 662         value = CLAMP (value, adjustment->lower,
 663                        adjustment->upper - adjustment->page_size);
 664
 665         gtk_adjustment_set_value (adjustment, value);
 666 }
 667
 668 #define MARGIN 5
 669
 670 static void
 671 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 672 {
 673         GtkWidget *widget = GTK_WIDGET (view);
 674         GtkAdjustment *adjustment;
 675         int value;
 676
 677         adjustment = view->vadjustment;
 678
 679         if (rect->y < adjustment->value) {
 680                 value = MAX (adjustment->lower, rect->y - MARGIN);
 681                 gtk_adjustment_set_value (view->vadjustment, value);
 682         } else if (rect->y + rect->height >
 683                    adjustment->value + widget->allocation.height) {
 684                 value = MIN (adjustment->upper, rect->y + rect->height -
 685                              widget->allocation.height + MARGIN);
 686                 gtk_adjustment_set_value (view->vadjustment, value);
 687         }
 688
 689         adjustment = view->hadjustment;
 690
 691         if (rect->x < adjustment->value) {
 692                 value = MAX (adjustment->lower, rect->x - MARGIN);
 693                 gtk_adjustment_set_value (view->hadjustment, value);
 694         } else if (rect->x + rect->height >
 695                    adjustment->value + widget->allocation.width) {
 696                 value = MIN (adjustment->upper, rect->x + rect->width -
 697                              widget->allocation.width + MARGIN);
 698                 gtk_adjustment_set_value (view->hadjustment, value);
 699         }
 700 }
 701
 702 /*** Geometry computations ***/
 703
 704 static void
 705 compute_border (EvView *view, int width, int height, GtkBorder *border)
 706 {
 707         if (view->presentation) {
 708                 border->left = 0;
 709                 border->right = 0;
 710                 border->top = 0;
 711                 border->bottom = 0;
 712         } else {
 713                 ev_document_misc_get_page_border_size (width, height, border);
 714         }
 715 }
 716
 717 static void       get_page_y_offset                          (EvView *view,
 718                                                               int page,
 719                                                               double zoom,
 720                                                               int *y_offset)
 721 {
 722         int max_width, offset;
 723         GtkBorder border;
 724
 725         g_return_if_fail (y_offset != NULL);
 726
 727         ev_page_cache_get_max_width (view->page_cache, zoom, &max_width);
 728
 729         compute_border (view, max_width, max_width, &border);
 730
 731         if (view->dual_page) {
 732                 ev_page_cache_get_height_to_page (view->page_cache, page, zoom, NULL, &offset);
 733                 offset += (page / 2 + 1) * view->spacing + (page / 2) * (border.top + border.bottom);
 734         } else {
 735                 ev_page_cache_get_height_to_page (view->page_cache, page, zoom, &offset, NULL);
 736                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 737         }
 738
 739         *y_offset = offset;
 740         return;
 741 }
 742
 743 static gboolean
 744 get_page_extents (EvView       *view,
 745                   gint          page,
 746                   GdkRectangle *page_area,
 747                   GtkBorder    *border)
 748 {
 749         GtkWidget *widget;
 750         int width, height;
 751
 752         widget = GTK_WIDGET (view);
 753
 754         /* Get the size of the page */
 755         ev_page_cache_get_size (view->page_cache, page,
 756                                 view->scale,
 757                                 &width, &height);
 758         compute_border (view, width, height, border);
 759         page_area->width = width + border->left + border->right;
 760         page_area->height = height + border->top + border->bottom;
 761
 762         if (view->presentation) {
 763                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 764                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 765         } else if (view->continuous) {
 766                 gint max_width;
 767                 gint x, y;
 768
 769                 ev_page_cache_get_max_width (view->page_cache, view->scale, &max_width);
 770                 max_width = max_width + border->left + border->right;
 771                 /* Get the location of the bounding box */
 772                 if (view->dual_page) {
 773                         x = view->spacing + (page % 2) * (max_width + view->spacing);
 774                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 775                         if (page % 2 == 0)
 776                                 x = x + (max_width - width - border->left - border->right);
 777                 } else {
 778                         x = view->spacing;
 779                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 780                 }
 781
 782                 get_page_y_offset (view, page, view->scale, &y);
 783
 784                 page_area->x = x;
 785                 page_area->y = y;
 786         } else {
 787                 gint x, y;
 788                 if (view->dual_page) {
 789                         gint width_2, height_2;
 790                         gint max_width = width;
 791                         gint max_height = height;
 792                         GtkBorder overall_border;
 793                         gint other_page;
 794
 795                         other_page = page ^ 1;
 796
 797                         /* First, we get the bounding box of the two pages */
 798                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
 799                                 ev_page_cache_get_size (view->page_cache,
 800                                                         other_page,
 801                                                         view->scale,
 802                                                         &width_2, &height_2);
 803                                 if (width_2 > width)
 804                                         max_width = width_2;
 805                                 if (height_2 > height)
 806                                         max_height = height_2;
 807                         }
 808                         compute_border (view, max_width, max_height, &overall_border);
 809
 810                         /* Find the offsets */
 811                         x = view->spacing;
 812                         y = view->spacing;
 813
 814                         /* Adjust for being the left or right page */
 815                         if (page % 2 == 0)
 816                                 x = x + max_width - width;
 817                         else
 818                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 819
 820                         y = y + (max_height - height)/2;
 821
 822                         /* Adjust for extra allocation */
 823                         x = x + MAX (0, widget->allocation.width -
 824                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 825                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 826                 } else {
 827                         x = view->spacing;
 828                         y = view->spacing;
 829
 830                         /* Adjust for extra allocation */
 831                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 832                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 833                 }
 834
 835                 page_area->x = x;
 836                 page_area->y = y;
 837         }
 838
 839         return TRUE;
 840 }
 841
 842 static void
 843 view_rect_to_doc_rect (EvView *view,
 844                        GdkRectangle *view_rect,
 845                        GdkRectangle *page_area,
 846                        EvRectangle  *doc_rect)
 847 {
 848         doc_rect->x1 = floor ((view_rect->x - page_area->x) / view->scale);
 849         doc_rect->y1 = floor ((view_rect->y - page_area->y) / view->scale);
 850         doc_rect->x2 = doc_rect->x1 + ceil (view_rect->width / view->scale);
 851         doc_rect->y2 = doc_rect->y1 + ceil (view_rect->height / view->scale);
 852 }
 853
 854 static void
 855 doc_rect_to_view_rect (EvView       *view,
 856                        int           page,
 857                        EvRectangle  *doc_rect,
 858                        GdkRectangle *view_rect)
 859 {
 860         GdkRectangle page_area;
 861         GtkBorder border;
 862         int width, height;
 863
 864         get_page_extents (view, page, &page_area, &border);
 865
 866         width = doc_rect->x2 - doc_rect->x1;
 867         height = doc_rect->y2 - doc_rect->y1;
 868         view_rect->x = floor (doc_rect->x1 * view->scale) + page_area.x;
 869         view_rect->y = floor (doc_rect->y1 * view->scale) + page_area.y;
 870         view_rect->width = ceil (width * view->scale);
 871         view_rect->height = ceil (height * view->scale);
 872 }
 873
 874 static void
 875 find_page_at_location (EvView  *view,
 876                        gdouble  x,
 877                        gdouble  y,
 878                        gint    *page,
 879                        gint    *x_offset,
 880                        gint    *y_offset)
 881 {
 882         int i;
 883
 884         if (view->document == NULL)
 885                 return;
 886
 887         g_assert (page);
 888         g_assert (x_offset);
 889         g_assert (y_offset);
 890
 891         for (i = view->start_page; i <= view->end_page; i++) {
 892                 GdkRectangle page_area;
 893                 GtkBorder border;
 894
 895                 if (! get_page_extents (view, i, &page_area, &border))
 896                         continue;
 897
 898                 if ((x >= page_area.x + border.left) &&
 899                     (x < page_area.x + page_area.width - border.right) &&
 900                     (y >= page_area.y + border.top) &&
 901                     (y < page_area.y + page_area.height - border.bottom)) {
 902                         *page = i;
 903                         *x_offset = x - (page_area.x + border.left);
 904                         *y_offset = y - (page_area.y + border.top);
 905                         return;
 906                 }
 907         }
 908
 909         *page = -1;
 910 }
 911
 912 /*** Hyperref ***/
 913 static EvLink *
 914 get_link_at_location (EvView  *view,
 915                       gdouble  x,
 916                       gdouble  y)
 917 {
 918         gint page = -1;
 919         gint x_offset = 0, y_offset = 0;
 920         GList *link_mapping;
 921
 922         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
 923
 924         if (page == -1)
 925                 return NULL;
 926
 927         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
 928
 929         if (link_mapping)
 930                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
 931         else
 932                 return NULL;
 933 }
 934
 935 /* FIXME: standardize this sometime */
 936 static void
 937 go_to_link (EvView *view, EvLink *link)
 938 {
 939         EvLinkType type;
 940         const char *uri;
 941         int page;
 942
 943         type = ev_link_get_link_type (link);
 944
 945         switch (type) {
 946                 case EV_LINK_TYPE_TITLE:
 947                         break;
 948                 case EV_LINK_TYPE_PAGE:
 949                         page = ev_link_get_page (link);
 950                         ev_page_cache_set_current_page (view->page_cache, page);
 951                         break;
 952                 case EV_LINK_TYPE_EXTERNAL_URI:
 953                         uri = ev_link_get_uri (link);
 954                         gnome_vfs_url_show (uri);
 955                         break;
 956         }
 957 }
 958
 959 static char *
 960 status_message_from_link (EvView *view, EvLink *link)
 961 {
 962         EvLinkType type;
 963         char *msg = NULL;
 964         char *page_label;
 965
 966         type = ev_link_get_link_type (link);
 967
 968         switch (type) {
 969                 case EV_LINK_TYPE_TITLE:
 970                         if (ev_link_get_title (link))
 971                                 msg = g_strdup (ev_link_get_title (link));
 972                         break;
 973                 case EV_LINK_TYPE_PAGE:
 974                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
 975                         msg = g_strdup_printf (_("Go to page %s"), page_label);
 976                         g_free (page_label);
 977                         break;
 978                 case EV_LINK_TYPE_EXTERNAL_URI:
 979                         msg = g_strdup (ev_link_get_uri (link));
 980                         break;
 981                 default:
 982                         break;
 983         }
 984
 985         return msg;
 986 }
 987
 988
 989 /*** GtkWidget implementation ***/
 990
 991 static void
 992 ev_view_size_request_continuous_dual_page (EvView         *view,
 993                                            GtkRequisition *requisition)
 994 {
 995         int max_width;
 996         gint n_pages;
 997         GtkBorder border;
 998
 999         ev_page_cache_get_max_width (view->page_cache, view->scale, &max_width);
1000         compute_border (view, max_width, max_width, &border);
1001
1002         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
1003
1004         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
1005         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1006
1007         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1008                 requisition->width = 1;
1009         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1010                 requisition->width = 1;
1011                 /* FIXME: This could actually be set on one page docs or docs
1012                  * with a strange aspect ratio. */
1013                 /* requisition->height = 1;*/
1014         }
1015 }
1016
1017 static void
1018 ev_view_size_request_continuous (EvView         *view,
1019                                  GtkRequisition *requisition)
1020 {
1021         int max_width;
1022         int n_pages;
1023         GtkBorder border;
1024
1025
1026         ev_page_cache_get_max_width (view->page_cache, view->scale, &max_width);
1027         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1028         compute_border (view, max_width, max_width, &border);
1029
1030         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
1031         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1032
1033         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1034                 requisition->width = 1;
1035         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1036                 requisition->width = 1;
1037                 /* FIXME: This could actually be set on one page docs or docs
1038                  * with a strange aspect ratio. */
1039                 /* requisition->height = 1;*/
1040         }
1041 }
1042
1043 static void
1044 ev_view_size_request_dual_page (EvView         *view,
1045                                 GtkRequisition *requisition)
1046 {
1047         GtkBorder border;
1048         gint width, height;
1049
1050         /* Find the largest of the two. */
1051         ev_page_cache_get_size (view->page_cache,
1052                                 view->current_page,
1053                                 view->scale,
1054                                 &width, &height);
1055         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1056                 gint width_2, height_2;
1057                 ev_page_cache_get_size (view->page_cache,
1058                                         view->current_page + 1,
1059                                         view->scale,
1060                                         &width_2, &height_2);
1061                 if (width_2 > width) {
1062                         width = width_2;
1063                         height = height_2;
1064                 }
1065         }
1066         compute_border (view, width, height, &border);
1067
1068         requisition->width = ((width + border.left + border.right) * 2) +
1069                 (view->spacing * 3);
1070         requisition->height = (height + border.top + border.bottom) +
1071                 (view->spacing * 2);
1072
1073         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1074                 requisition->width = 1;
1075         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1076                 requisition->width = 1;
1077                 requisition->height = 1;
1078         }
1079 }
1080
1081 static void
1082 ev_view_size_request_single_page (EvView         *view,
1083                                   GtkRequisition *requisition)
1084 {
1085         GtkBorder border;
1086         gint width, height;
1087
1088         ev_page_cache_get_size (view->page_cache,
1089                                 view->current_page,
1090                                 view->scale,
1091                                 &width, &height);
1092         compute_border (view, width, height, &border);
1093
1094         requisition->width = width + border.left + border.right + (2 * view->spacing);
1095         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1096
1097         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1098                 requisition->width = 1;
1099                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1100         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1101                 requisition->width = 1;
1102                 requisition->height = 1;
1103         }
1104 }
1105
1106 static void
1107 ev_view_size_request (GtkWidget      *widget,
1108                       GtkRequisition *requisition)
1109 {
1110         EvView *view = EV_VIEW (widget);
1111
1112         if (view->document == NULL) {
1113                 requisition->width = 1;
1114                 requisition->height = 1;
1115                 return;
1116         }
1117
1118         if (view->presentation) {
1119                 requisition->width = 1;
1120                 requisition->height = 1;
1121                 return;
1122         }
1123
1124         if (view->continuous && view->dual_page)
1125                 ev_view_size_request_continuous_dual_page (view, requisition);
1126         else if (view->continuous)
1127                 ev_view_size_request_continuous (view, requisition);
1128         else if (view->dual_page)
1129                 ev_view_size_request_dual_page (view, requisition);
1130         else
1131                 ev_view_size_request_single_page (view, requisition);
1132 }
1133
1134 static void
1135 ev_view_size_allocate (GtkWidget      *widget,
1136                        GtkAllocation  *allocation)
1137 {
1138         EvView *view = EV_VIEW (widget);
1139
1140         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1141                   view->sizing_mode == EV_SIZING_BEST_FIT) {
1142
1143                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1144
1145                 ev_view_size_request (widget, &widget->requisition);
1146         }
1147
1148         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1149         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1150
1151         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1152         view->pending_resize = FALSE;
1153
1154         if (view->document)
1155                 view_update_range_and_current_page (view);
1156
1157         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1158 }
1159
1160 static void
1161 ev_view_realize (GtkWidget *widget)
1162 {
1163         EvView *view = EV_VIEW (widget);
1164         GdkWindowAttr attributes;
1165
1166         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1167
1168
1169         attributes.window_type = GDK_WINDOW_CHILD;
1170         attributes.wclass = GDK_INPUT_OUTPUT;
1171         attributes.visual = gtk_widget_get_visual (widget);
1172         attributes.colormap = gtk_widget_get_colormap (widget);
1173
1174         attributes.x = widget->allocation.x;
1175         attributes.y = widget->allocation.y;
1176         attributes.width = widget->allocation.width;
1177         attributes.height = widget->allocation.height;
1178         attributes.event_mask = GDK_EXPOSURE_MASK |
1179                                 GDK_BUTTON_PRESS_MASK |
1180                                 GDK_BUTTON_RELEASE_MASK |
1181                                 GDK_SCROLL_MASK |
1182                                 GDK_KEY_PRESS_MASK |
1183                                 GDK_POINTER_MOTION_MASK |
1184                                 GDK_LEAVE_NOTIFY_MASK;
1185
1186         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1187                                          &attributes,
1188                                          GDK_WA_X | GDK_WA_Y |
1189                                          GDK_WA_COLORMAP |
1190                                          GDK_WA_VISUAL);
1191         gdk_window_set_user_data (widget->window, widget);
1192         widget->style = gtk_style_attach (widget->style, widget->window);
1193
1194         if (view->presentation)
1195                 gdk_window_set_background (widget->window, &widget->style->black);
1196         else
1197                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1198 }
1199
1200 static void
1201 ev_view_unrealize (GtkWidget *widget)
1202 {
1203         GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
1204 }
1205
1206 static gboolean
1207 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1208 {
1209         EvView *view = EV_VIEW (widget);
1210
1211         if ((event->state & GDK_CONTROL_MASK) != 0) {
1212
1213                  ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1214
1215                  if (event->direction == GDK_SCROLL_UP ||
1216                         event->direction == GDK_SCROLL_LEFT) {
1217                             if (ev_view_can_zoom_in (view)) {
1218                                     ev_view_zoom_in (view);
1219                             }
1220                  } else {
1221                             if (ev_view_can_zoom_out (view)) {
1222                                     ev_view_zoom_out (view);
1223                             }
1224                  }
1225                  return TRUE;
1226         }
1227
1228         if ((event->state & GDK_SHIFT_MASK) != 0) {
1229                 if (event->direction == GDK_SCROLL_UP)
1230                         event->direction = GDK_SCROLL_LEFT;
1231                 if (event->direction == GDK_SCROLL_DOWN)
1232                         event->direction = GDK_SCROLL_RIGHT;
1233         }
1234
1235         return FALSE;
1236 }
1237
1238 static gboolean
1239 ev_view_expose_event (GtkWidget      *widget,
1240                       GdkEventExpose *event)
1241 {
1242         EvView *view = EV_VIEW (widget);
1243         GdkRectangle rubberband;
1244         GList *l;
1245         int i;
1246
1247         if (view->document == NULL)
1248                 return FALSE;
1249
1250         for (i = view->start_page; i <= view->end_page; i++) {
1251                 GdkRectangle page_area;
1252                 GtkBorder border;
1253
1254                 if (!get_page_extents (view, i, &page_area, &border))
1255                         continue;
1256
1257                 page_area.x -= view->scroll_x;
1258                 page_area.y -= view->scroll_y;
1259
1260                 draw_one_page (view, i, &page_area, &border, &(event->area));
1261
1262                 if (EV_IS_DOCUMENT_FIND (view->document)) {
1263                         highlight_find_results (view, i);
1264                 }
1265         }
1266
1267         for (l = view->selections; l != NULL; l = l->next) {
1268                 EvViewSelection *selection = (EvViewSelection *)l->data;
1269
1270                 doc_rect_to_view_rect (view, selection->page,
1271                                        &selection->rect, &rubberband);
1272                 if (rubberband.width > 0 && rubberband.height > 0) {
1273                         draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
1274                                          &rubberband, 0x40);
1275                 }
1276         }
1277
1278         return FALSE;
1279 }
1280
1281 static gboolean
1282 ev_view_button_press_event (GtkWidget      *widget,
1283                             GdkEventButton *event)
1284 {
1285         EvView *view = EV_VIEW (widget);
1286
1287         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1288                 gtk_widget_grab_focus (widget);
1289         }
1290
1291         view->pressed_button = event->button;
1292
1293         switch (event->button) {
1294                 case 1:
1295                         if (view->selections) {
1296                                 clear_selection (view);
1297                                 gtk_widget_queue_draw (widget);
1298                         }
1299
1300                         view->selection_start.x = event->x;
1301                         view->selection_start.y = event->y;
1302                         return TRUE;
1303                 case 2:
1304                         /* use root coordinates as reference point because
1305                          * scrolling changes window relative coordinates */
1306                         view->drag_info.start.x = event->x_root;
1307                         view->drag_info.start.y = event->y_root;
1308                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1309                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1310
1311                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1312
1313                         return TRUE;
1314         }
1315
1316         return FALSE;
1317 }
1318
1319 static gboolean
1320 ev_view_motion_notify_event (GtkWidget      *widget,
1321                              GdkEventMotion *event)
1322 {
1323         EvView *view = EV_VIEW (widget);
1324
1325         if (!view->document)
1326                 return FALSE;
1327
1328         if (view->pressed_button == 1) {
1329                 GdkRectangle selection;
1330
1331                 selection.x = MIN (view->selection_start.x, event->x) + view->scroll_x;
1332                 selection.y = MIN (view->selection_start.y, event->y) + view->scroll_y;
1333                 selection.width = ABS (view->selection_start.x - event->x) + 1;
1334                 selection.height = ABS (view->selection_start.y - event->y) + 1;
1335
1336                 compute_selections (view, &selection);
1337
1338                 gtk_widget_queue_draw (widget);
1339
1340                 return TRUE;
1341         } else if (view->pressed_button == 2) {
1342                 if (!view->drag_info.dragging) {
1343                         gboolean start;
1344
1345                         start = gtk_drag_check_threshold (widget,
1346                                                           view->drag_info.start.x,
1347                                                           view->drag_info.start.y,
1348                                                           event->x_root,
1349                                                           event->y_root);
1350                         view->drag_info.dragging = start;
1351                 }
1352
1353                 if (view->drag_info.dragging) {
1354                         int dx, dy;
1355                         gdouble dhadj_value, dvadj_value;
1356
1357                         dx = event->x_root - view->drag_info.start.x;
1358                         dy = event->y_root - view->drag_info.start.y;
1359
1360                         dhadj_value = view->hadjustment->page_size *
1361                                       (gdouble)dx / widget->allocation.width;
1362                         dvadj_value = view->vadjustment->page_size *
1363                                       (gdouble)dy / widget->allocation.height;
1364
1365                         /* clamp scrolling to visible area */
1366                         gtk_adjustment_set_value (view->hadjustment,
1367                                                   MIN(view->drag_info.hadj - dhadj_value,
1368                                                       view->hadjustment->upper -
1369                                                       view->hadjustment->page_size));
1370                         gtk_adjustment_set_value (view->vadjustment,
1371                                                   MIN(view->drag_info.vadj - dvadj_value,
1372                                                       view->vadjustment->upper -
1373                                                       view->vadjustment->page_size));
1374
1375                         return TRUE;
1376                 }
1377         } else if (view->pressed_button <= 0) {
1378                 EvLink *link;
1379
1380                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1381                 if (link) {
1382                         char *msg;
1383
1384                         msg = status_message_from_link (view, link);
1385                         ev_view_set_status (view, msg);
1386                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1387                         g_free (msg);
1388                 } else {
1389                         ev_view_set_status (view, NULL);
1390                         if (view->cursor == EV_VIEW_CURSOR_LINK) {
1391                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1392                         }
1393                 }
1394                 return TRUE;
1395         }
1396
1397         return FALSE;
1398 }
1399
1400 static gboolean
1401 ev_view_button_release_event (GtkWidget      *widget,
1402                               GdkEventButton *event)
1403 {
1404         EvView *view = EV_VIEW (widget);
1405
1406         if (view->pressed_button == 2) {
1407                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1408         }
1409
1410         view->pressed_button = -1;
1411         view->drag_info.dragging = FALSE;
1412
1413         if (view->selections) {
1414                 ev_view_update_primary_selection (view);
1415         } else if (view->document) {
1416                 EvLink *link;
1417
1418                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1419                 if (link) {
1420                         go_to_link (view, link);
1421                 }
1422         }
1423
1424         return FALSE;
1425 }
1426
1427 /*** Drawing ***/
1428
1429 static guint32
1430 ev_gdk_color_to_rgb (const GdkColor *color)
1431 {
1432   guint32 result;
1433   result = (0xff0000 | (color->red & 0xff00));
1434   result <<= 8;
1435   result |= ((color->green & 0xff00) | (color->blue >> 8));
1436   return result;
1437 }
1438
1439 static void
1440 draw_rubberband (GtkWidget *widget, GdkWindow *window,
1441                  const GdkRectangle *rect, guchar alpha)
1442 {
1443         GdkGC *gc;
1444         GdkPixbuf *pixbuf;
1445         GdkColor *fill_color_gdk;
1446         guint fill_color;
1447
1448         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
1449         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
1450
1451         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
1452                                  rect->width, rect->height);
1453         gdk_pixbuf_fill (pixbuf, fill_color);
1454
1455         gdk_draw_pixbuf (window, NULL, pixbuf,
1456                          0, 0,
1457                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1458                          rect->width, rect->height,
1459                          GDK_RGB_DITHER_NONE,
1460                          0, 0);
1461
1462         g_object_unref (pixbuf);
1463
1464         gc = gdk_gc_new (window);
1465         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
1466         gdk_draw_rectangle (window, gc, FALSE,
1467                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1468                             rect->width - 1,
1469                             rect->height - 1);
1470         g_object_unref (gc);
1471
1472         gdk_color_free (fill_color_gdk);
1473 }
1474
1475
1476 static void
1477 highlight_find_results (EvView *view, int page)
1478 {
1479         EvDocumentFind *find;
1480         int i, results = 0;
1481
1482         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
1483
1484         find = EV_DOCUMENT_FIND (view->document);
1485
1486         results = ev_document_find_get_n_results (find, page);
1487
1488         for (i = 0; i < results; i++) {
1489                 EvRectangle rectangle;
1490                 GdkRectangle view_rectangle;
1491                 guchar alpha;
1492
1493                 if (i == view->find_result && page == view->find_page) {
1494                         alpha = 0x90;
1495                 } else {
1496                         alpha = 0x20;
1497                 }
1498
1499                 ev_document_find_get_result (find, page,
1500                                              i, &rectangle);
1501                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
1502                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
1503                                  &view_rectangle, alpha);
1504         }
1505 }
1506
1507 static void
1508 draw_one_page (EvView       *view,
1509                gint          page,
1510                GdkRectangle *page_area,
1511                GtkBorder    *border,
1512                GdkRectangle *expose_area)
1513 {
1514         gint width, height;
1515         GdkPixbuf *scaled_image;
1516         GdkPixbuf *current_pixbuf;
1517         GdkRectangle overlap;
1518         GdkRectangle real_page_area;
1519
1520         g_assert (view->document);
1521         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
1522                 return;
1523
1524         ev_page_cache_get_size (view->page_cache,
1525                                 page, view->scale,
1526                                 &width, &height);
1527         /* Render the document itself */
1528         real_page_area = *page_area;
1529
1530         real_page_area.x += border->left;
1531         real_page_area.y += border->top;
1532         real_page_area.width -= (border->left + border->right);
1533         real_page_area.height -= (border->top + border->bottom);
1534
1535         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
1536                                          GTK_WIDGET (view),
1537                                          page_area, border);
1538
1539         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
1540                 current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
1541
1542                 if (current_pixbuf == NULL)
1543                         scaled_image = NULL;
1544                 else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
1545                          height == gdk_pixbuf_get_height (current_pixbuf))
1546                         scaled_image = g_object_ref (current_pixbuf);
1547                 else
1548                         /* FIXME: We don't want to scale the whole area, just the right
1549                          * area of it */
1550                         scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
1551                                                                 width, height,
1552                                                                 GDK_INTERP_NEAREST);
1553
1554                 if (scaled_image) {
1555                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
1556                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
1557                                          scaled_image,
1558                                          overlap.x - real_page_area.x,
1559                                          overlap.y - real_page_area.y,
1560                                          overlap.x, overlap.y,
1561                                          overlap.width, overlap.height,
1562                                          GDK_RGB_DITHER_NORMAL,
1563                                          0, 0);
1564                         g_object_unref (scaled_image);
1565                 }
1566         }
1567 }
1568
1569 /*** GObject functions ***/
1570
1571 static void
1572 ev_view_finalize (GObject *object)
1573 {
1574         EvView *view = EV_VIEW (object);
1575
1576         LOG ("Finalize");
1577
1578         g_free (view->status);
1579         g_free (view->find_status);
1580
1581         clear_selection (view);
1582
1583         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
1584 }
1585
1586 static void
1587 ev_view_destroy (GtkObject *object)
1588 {
1589         EvView *view = EV_VIEW (object);
1590
1591         if (view->document) {
1592                 g_object_unref (view->document);
1593                 view->document = NULL;
1594         }
1595         if (view->pixbuf_cache) {
1596                 g_object_unref (view->pixbuf_cache);
1597                 view->pixbuf_cache = NULL;
1598         }
1599         ev_view_set_scroll_adjustments (view, NULL, NULL);
1600
1601         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
1602 }
1603
1604 static void
1605 ev_view_set_property (GObject      *object,
1606                       guint         prop_id,
1607                       const GValue *value,
1608                       GParamSpec   *pspec)
1609 {
1610         EvView *view = EV_VIEW (object);
1611
1612         switch (prop_id)
1613         {
1614         case PROP_CONTINUOUS:
1615                 ev_view_set_continuous (view, g_value_get_boolean (value));
1616                 break;
1617         case PROP_DUAL_PAGE:
1618                 ev_view_set_dual_page (view, g_value_get_boolean (value));
1619                 break;
1620         case PROP_FULLSCREEN:
1621                 ev_view_set_fullscreen (view, g_value_get_boolean (value));
1622                 break;
1623         case PROP_PRESENTATION:
1624                 ev_view_set_presentation (view, g_value_get_boolean (value));
1625                 break;
1626         case PROP_SIZING_MODE:
1627                 ev_view_set_sizing_mode (view, g_value_get_enum (value));
1628                 break;
1629         case PROP_ZOOM:
1630                 ev_view_set_zoom (view, g_value_get_double (value), FALSE);
1631                 break;
1632         default:
1633                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1634         }
1635 }
1636
1637 static void
1638 ev_view_get_property (GObject *object,
1639                       guint prop_id,
1640                       GValue *value,
1641                       GParamSpec *pspec)
1642 {
1643         EvView *view = EV_VIEW (object);
1644
1645         switch (prop_id)
1646         {
1647         case PROP_STATUS:
1648                 g_value_set_string (value, view->status);
1649                 break;
1650         case PROP_FIND_STATUS:
1651                 g_value_set_string (value, view->status);
1652                 break;
1653         case PROP_CONTINUOUS:
1654                 g_value_set_boolean (value, view->continuous);
1655                 break;
1656         case PROP_DUAL_PAGE:
1657                 g_value_set_boolean (value, view->dual_page);
1658                 break;
1659         case PROP_FULLSCREEN:
1660                 g_value_set_boolean (value, view->fullscreen);
1661                 break;
1662         case PROP_PRESENTATION:
1663                 g_value_set_boolean (value, view->presentation);
1664                 break;
1665         case PROP_SIZING_MODE:
1666                 g_value_set_enum (value, view->sizing_mode);
1667                 break;
1668         case PROP_ZOOM:
1669                 g_value_set_double (value, view->scale);
1670                 break;
1671         default:
1672                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1673         }
1674 }
1675
1676 static void
1677 ev_view_class_init (EvViewClass *class)
1678 {
1679         GObjectClass *object_class = G_OBJECT_CLASS (class);
1680         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
1681         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
1682         GtkBindingSet *binding_set;
1683
1684         object_class->finalize = ev_view_finalize;
1685         object_class->set_property = ev_view_set_property;
1686         object_class->get_property = ev_view_get_property;
1687
1688         widget_class->expose_event = ev_view_expose_event;
1689         widget_class->button_press_event = ev_view_button_press_event;
1690         widget_class->motion_notify_event = ev_view_motion_notify_event;
1691         widget_class->button_release_event = ev_view_button_release_event;
1692         widget_class->size_request = ev_view_size_request;
1693         widget_class->size_allocate = ev_view_size_allocate;
1694         widget_class->realize = ev_view_realize;
1695         widget_class->unrealize = ev_view_unrealize;
1696         widget_class->scroll_event = ev_view_scroll_event;
1697         gtk_object_class->destroy = ev_view_destroy;
1698
1699         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
1700         class->scroll_view = ev_view_scroll_view;
1701
1702         widget_class->set_scroll_adjustments_signal =
1703             g_signal_new ("set-scroll-adjustments",
1704                           G_OBJECT_CLASS_TYPE (object_class),
1705                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1706                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
1707                           NULL, NULL,
1708                           ev_marshal_VOID__OBJECT_OBJECT,
1709                           G_TYPE_NONE, 2,
1710                           GTK_TYPE_ADJUSTMENT,
1711                           GTK_TYPE_ADJUSTMENT);
1712
1713         signals[SIGNAL_SCROLL_VIEW] = g_signal_new ("scroll-view",
1714                          G_TYPE_FROM_CLASS (object_class),
1715                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1716                          G_STRUCT_OFFSET (EvViewClass, scroll_view),
1717                          NULL, NULL,
1718                          ev_marshal_VOID__ENUM_BOOLEAN,
1719                          G_TYPE_NONE, 2,
1720                          GTK_TYPE_SCROLL_TYPE,
1721                          G_TYPE_BOOLEAN);
1722
1723         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
1724                          G_TYPE_FROM_CLASS (object_class),
1725                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1726                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
1727                          NULL, NULL,
1728                          ev_marshal_VOID__VOID,
1729                          G_TYPE_NONE, 0, G_TYPE_NONE);
1730
1731         g_object_class_install_property (object_class,
1732                                          PROP_STATUS,
1733                                          g_param_spec_string ("status",
1734                                                               "Status Message",
1735                                                               "The status message",
1736                                                               NULL,
1737                                                               G_PARAM_READABLE));
1738
1739         g_object_class_install_property (object_class,
1740                                          PROP_FIND_STATUS,
1741                                          g_param_spec_string ("find-status",
1742                                                               "Find Status Message",
1743                                                               "The find status message",
1744                                                               NULL,
1745                                                               G_PARAM_READABLE));
1746
1747         g_object_class_install_property (object_class,
1748                                          PROP_CONTINUOUS,
1749                                          g_param_spec_boolean ("continuous",
1750                                                                "Continuous",
1751                                                                "Continuous scrolling mode",
1752                                                                TRUE,
1753                                                                G_PARAM_READWRITE));
1754
1755         g_object_class_install_property (object_class,
1756                                          PROP_DUAL_PAGE,
1757                                          g_param_spec_boolean ("dual-page",
1758                                                                "Dual Page",
1759                                                                "Two pages visible at once",
1760                                                                FALSE,
1761                                                                G_PARAM_READWRITE));
1762         g_object_class_install_property (object_class,
1763                                          PROP_FULLSCREEN,
1764                                          g_param_spec_boolean ("fullscreen",
1765                                                                "Full Screen",
1766                                                                "Draw page in a fullscreen fashion",
1767                                                                FALSE,
1768                                                                G_PARAM_READWRITE));
1769         g_object_class_install_property (object_class,
1770                                          PROP_PRESENTATION,
1771                                          g_param_spec_boolean ("presentation",
1772                                                                "Presentation",
1773                                                                "Draw page in presentation mode",
1774                                                                TRUE,
1775                                                                G_PARAM_READWRITE));
1776
1777         g_object_class_install_property (object_class,
1778                                          PROP_SIZING_MODE,
1779                                          g_param_spec_enum ("sizing-mode",
1780                                                             "Sizing Mode",
1781                                                             "Sizing Mode",
1782                                                             EV_TYPE_SIZING_MODE,
1783                                                             EV_SIZING_FIT_WIDTH,
1784                                                             G_PARAM_READWRITE));
1785
1786         g_object_class_install_property (object_class,
1787                                          PROP_ZOOM,
1788                                          g_param_spec_double ("zoom",
1789                                                               "Zoom factor",
1790                                                                "Zoom factor",
1791                                                                MIN_SCALE,
1792                                                                MAX_SCALE,
1793                                                                1.0,
1794                                                                G_PARAM_READWRITE));
1795
1796         binding_set = gtk_binding_set_by_class (class);
1797
1798         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
1799         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
1800         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
1801         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
1802 }
1803
1804 static void
1805 ev_view_init (EvView *view)
1806 {
1807         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
1808
1809         view->spacing = 5;
1810         view->scale = 1.0;
1811         view->current_page = 0;
1812         view->pressed_button = -1;
1813         view->cursor = EV_VIEW_CURSOR_NORMAL;
1814         view->drag_info.dragging = FALSE;
1815
1816         view->continuous = TRUE;
1817         view->dual_page = FALSE;
1818         view->presentation = FALSE;
1819         view->fullscreen = FALSE;
1820         view->sizing_mode = EV_SIZING_FIT_WIDTH;
1821         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1822 }
1823
1824 /*** Callbacks ***/
1825
1826 static void
1827 find_changed_cb (EvDocument *document, int page, EvView *view)
1828 {
1829         jump_to_find_page (view);
1830         jump_to_find_result (view);
1831         update_find_status_message (view);
1832
1833         if (view->current_page == page)
1834                 gtk_widget_queue_draw (GTK_WIDGET (view));
1835 }
1836
1837 static void
1838 job_finished_cb (EvPixbufCache *pixbuf_cache,
1839                  EvView        *view)
1840 {
1841         gtk_widget_queue_draw (GTK_WIDGET (view));
1842 }
1843
1844 static void
1845 page_changed_cb (EvPageCache *page_cache,
1846                  int          new_page,
1847                  EvView      *view)
1848 {
1849         if (view->current_page != new_page) {
1850
1851                 view->current_page = new_page;
1852                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
1853                 gtk_widget_queue_resize (GTK_WIDGET (view));
1854
1855                 if (EV_IS_DOCUMENT_FIND (view->document)) {
1856                         view->find_page = new_page;
1857                         view->find_result = 0;
1858                         update_find_status_message (view);
1859                 }
1860         }
1861 }
1862
1863 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
1864                                          EvView *view)
1865 {
1866         int dx = 0, dy = 0;
1867
1868         if (! GTK_WIDGET_REALIZED (view))
1869                 return;
1870
1871         if (view->hadjustment) {
1872                 dx = view->scroll_x - (int) view->hadjustment->value;
1873                 view->scroll_x = (int) view->hadjustment->value;
1874         } else {
1875                 view->scroll_x = 0;
1876         }
1877
1878         if (view->vadjustment) {
1879                 dy = view->scroll_y - (int) view->vadjustment->value;
1880                 view->scroll_y = (int) view->vadjustment->value;
1881         } else {
1882                 view->scroll_y = 0;
1883         }
1884
1885
1886         if (view->pending_resize)
1887                 gtk_widget_queue_draw (GTK_WIDGET (view));
1888         else
1889                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
1890
1891
1892         if (view->document)
1893                 view_update_range_and_current_page (view);}
1894
1895 GtkWidget*
1896 ev_view_new (void)
1897 {
1898         GtkWidget *view;
1899
1900         view = g_object_new (EV_TYPE_VIEW, NULL);
1901
1902         return view;
1903 }
1904
1905 static void
1906 setup_caches (EvView *view)
1907 {
1908         view->page_cache = ev_page_cache_get (view->document);
1909         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
1910         view->pixbuf_cache = ev_pixbuf_cache_new (view->document);
1911         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
1912 }
1913
1914 static void
1915 clear_caches (EvView *view)
1916 {
1917         if (view->pixbuf_cache) {
1918                 g_object_unref (view->pixbuf_cache);
1919                 view->pixbuf_cache = NULL;
1920         }
1921
1922         if (view->document) {
1923                 ev_page_cache_clear (view->document);
1924         }
1925 }
1926
1927 void
1928 ev_view_set_document (EvView     *view,
1929                       EvDocument *document)
1930 {
1931         g_return_if_fail (EV_IS_VIEW (view));
1932
1933         if (document != view->document) {
1934                 if (view->document) {
1935                         g_signal_handlers_disconnect_by_func (view->document,
1936                                                               find_changed_cb,
1937                                                               view);
1938                         g_object_unref (view->document);
1939                         view->page_cache = NULL;
1940
1941                 }
1942
1943                 clear_caches (view);
1944
1945                 view->document = document;
1946                 view->find_page = 0;
1947                 view->find_result = 0;
1948
1949                 if (view->document) {
1950                         g_object_ref (view->document);
1951                         if (EV_IS_DOCUMENT_FIND (view->document)) {
1952                                 g_signal_connect (view->document,
1953                                                   "find_changed",
1954                                                   G_CALLBACK (find_changed_cb),
1955                                                   view);
1956                         }
1957
1958                         setup_caches (view);
1959                 }
1960
1961                 gtk_widget_queue_resize (GTK_WIDGET (view));
1962         }
1963 }
1964
1965 /*** Zoom and sizing mode ***/
1966
1967 #define EPSILON 0.0000001
1968 void
1969 ev_view_set_zoom (EvView   *view,
1970                   double    factor,
1971                   gboolean  relative)
1972 {
1973         double scale;
1974
1975         if (relative)
1976                 scale = view->scale * factor;
1977         else
1978                 scale = factor;
1979
1980         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
1981
1982         if (ABS (view->scale - scale) < EPSILON)
1983                 return;
1984
1985         view->scale = scale;
1986         view->pending_resize = TRUE;
1987
1988         gtk_widget_queue_resize (GTK_WIDGET (view));
1989
1990         g_object_notify (G_OBJECT (view), "zoom");
1991 }
1992
1993 double
1994 ev_view_get_zoom (EvView *view)
1995 {
1996         return view->scale;
1997 }
1998
1999 void
2000 ev_view_set_continuous (EvView   *view,
2001                         gboolean  continuous)
2002 {
2003         g_return_if_fail (EV_IS_VIEW (view));
2004
2005         continuous = continuous != FALSE;
2006
2007         if (view->continuous != continuous) {
2008                 view->continuous = continuous;
2009                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2010                 gtk_widget_queue_resize (GTK_WIDGET (view));
2011         }
2012
2013         g_object_notify (G_OBJECT (view), "continuous");
2014 }
2015
2016 void
2017 ev_view_set_dual_page (EvView   *view,
2018                        gboolean  dual_page)
2019 {
2020         g_return_if_fail (EV_IS_VIEW (view));
2021
2022         dual_page = dual_page != FALSE;
2023
2024         if (view->dual_page == dual_page)
2025                 return;
2026
2027         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2028         view->dual_page = dual_page;
2029         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2030          * preload_cache_size to be 2 if dual_page is set.
2031          */
2032         gtk_widget_queue_resize (GTK_WIDGET (view));
2033
2034         g_object_notify (G_OBJECT (view), "dual-page");
2035 }
2036
2037 void
2038 ev_view_set_fullscreen (EvView   *view,
2039                          gboolean  fullscreen)
2040 {
2041         g_return_if_fail (EV_IS_VIEW (view));
2042
2043         fullscreen = fullscreen != FALSE;
2044
2045         if (view->fullscreen != fullscreen) {
2046                 view->fullscreen = fullscreen;
2047                 gtk_widget_queue_resize (GTK_WIDGET (view));
2048         }
2049
2050         g_object_notify (G_OBJECT (view), "fullscreen");
2051 }
2052
2053 gboolean
2054 ev_view_get_fullscreen (EvView *view)
2055 {
2056         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2057
2058         return view->fullscreen;
2059 }
2060
2061 void
2062 ev_view_set_presentation (EvView   *view,
2063                           gboolean  presentation)
2064 {
2065         g_return_if_fail (EV_IS_VIEW (view));
2066
2067         presentation = presentation != FALSE;
2068
2069         if (view->presentation == presentation)
2070                 return;
2071
2072         view->presentation = presentation;
2073         gtk_widget_queue_resize (GTK_WIDGET (view));
2074         if (GTK_WIDGET_REALIZED (view)) {
2075                 if (view->presentation)
2076                         gdk_window_set_background (GTK_WIDGET(view)->window,
2077                                                    &GTK_WIDGET (view)->style->black);
2078                 else
2079                         gdk_window_set_background (GTK_WIDGET(view)->window,
2080                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
2081         }
2082
2083
2084         g_object_notify (G_OBJECT (view), "presentation");
2085 }
2086
2087 gboolean
2088 ev_view_get_presentation (EvView *view)
2089 {
2090         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2091
2092         return view->presentation;
2093 }
2094
2095 void
2096 ev_view_set_sizing_mode (EvView       *view,
2097                          EvSizingMode  sizing_mode)
2098 {
2099         g_return_if_fail (EV_IS_VIEW (view));
2100
2101         if (view->sizing_mode == sizing_mode)
2102                 return;
2103
2104         view->sizing_mode = sizing_mode;
2105         gtk_widget_queue_resize (GTK_WIDGET (view));
2106
2107         g_object_notify (G_OBJECT (view), "sizing-mode");
2108 }
2109
2110 EvSizingMode
2111 ev_view_get_sizing_mode (EvView *view)
2112 {
2113         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
2114
2115         return view->sizing_mode;
2116 }
2117
2118 gboolean
2119 ev_view_can_zoom_in (EvView *view)
2120 {
2121         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
2122 }
2123
2124 gboolean
2125 ev_view_can_zoom_out (EvView *view)
2126 {
2127         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
2128 }
2129
2130 void
2131 ev_view_zoom_in (EvView *view)
2132 {
2133         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2134
2135         view->pending_scroll = SCROLL_TO_CENTER;
2136         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
2137 }
2138
2139 void
2140 ev_view_zoom_out (EvView *view)
2141 {
2142         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2143
2144         view->pending_scroll = SCROLL_TO_CENTER;
2145         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
2146 }
2147
2148 void
2149 ev_view_set_orientation (EvView         *view,
2150                          EvOrientation   orientation)
2151 {
2152         ev_document_set_orientation (view->document, orientation);
2153
2154         clear_caches (view);
2155         setup_caches (view);
2156
2157         gtk_widget_queue_resize (GTK_WIDGET (view));
2158 }
2159
2160 static double
2161 zoom_for_size_fit_width (int doc_width,
2162                          int doc_height,
2163                          int target_width,
2164                          int target_height,
2165                          int vsb_width)
2166 {
2167         double scale;
2168
2169         scale = (double)target_width / doc_width;
2170
2171         if (doc_height * scale > target_height)
2172                 scale = (double) (target_width - vsb_width) / doc_width;
2173
2174         return scale;
2175 }
2176
2177 static double
2178 zoom_for_size_best_fit (int doc_width,
2179                         int doc_height,
2180                         int target_width,
2181                         int target_height,
2182                         int vsb_width,
2183                         int hsb_width)
2184 {
2185         double w_scale;
2186         double h_scale;
2187
2188         w_scale = (double)target_width / doc_width;
2189         h_scale = (double)target_height / doc_height;
2190
2191         if (doc_height * w_scale > target_height)
2192                 w_scale = (double) (target_width - vsb_width) / doc_width;
2193         if (doc_width * h_scale > target_width)
2194                 h_scale = (double) (target_height - hsb_width) / doc_height;
2195
2196         return MIN (w_scale, h_scale);
2197 }
2198
2199
2200 static void
2201 ev_view_zoom_for_size_presentation (EvView *view,
2202                                     int     width,
2203                                     int     height)
2204 {
2205         int doc_width, doc_height;
2206         gdouble scale;
2207
2208         ev_page_cache_get_size (view->page_cache,
2209                                 view->current_page,
2210                                 1.0,
2211                                 &doc_width,
2212                                 &doc_height);
2213         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
2214         ev_view_set_zoom (view, scale, FALSE);
2215 }
2216
2217 static void
2218 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
2219                            int     width,
2220                            int     height,
2221                            int     vsb_width,
2222                            int     hsb_height)
2223 {
2224         int doc_width, doc_height;
2225         GtkBorder border;
2226         gdouble scale;
2227
2228         ev_page_cache_get_max_width (view->page_cache,
2229                                      1.0,
2230                                      &doc_width);
2231         ev_page_cache_get_max_height (view->page_cache,
2232                                       1.0,
2233                                       &doc_height);
2234         compute_border (view, doc_width, doc_height, &border);
2235
2236         doc_width = doc_width * 2;
2237         width -= (2 * (border.left + border.right) + 3 * view->spacing);
2238         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2239
2240         /* FIXME: We really need to calculate the overall height here, not the
2241          * page height.  We assume there's always a vertical scrollbar for
2242          * now.  We need to fix this. */
2243         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2244                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2245         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2246                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2247         else
2248                 g_assert_not_reached ();
2249
2250         ev_view_set_zoom (view, scale, FALSE);
2251 }
2252
2253 static void
2254 ev_view_zoom_for_size_continuous (EvView *view,
2255                                   int     width,
2256                                   int     height,
2257                                   int     vsb_width,
2258                                   int     hsb_height)
2259 {
2260         int doc_width, doc_height;
2261         GtkBorder border;
2262         gdouble scale;
2263
2264         ev_page_cache_get_max_width (view->page_cache,
2265                                      1.0,
2266                                      &doc_width);
2267         ev_page_cache_get_max_height (view->page_cache,
2268                                       1.0,
2269                                       &doc_height);
2270         compute_border (view, doc_width, doc_height, &border);
2271
2272         width -= (border.left + border.right + 2 * view->spacing);
2273         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2274
2275         /* FIXME: We really need to calculate the overall height here, not the
2276          * page height.  We assume there's always a vertical scrollbar for
2277          * now.  We need to fix this. */
2278         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2279                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2280         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2281                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2282         else
2283                 g_assert_not_reached ();
2284
2285         ev_view_set_zoom (view, scale, FALSE);
2286 }
2287
2288 static void
2289 ev_view_zoom_for_size_dual_page (EvView *view,
2290                                  int     width,
2291                                  int     height,
2292                                  int     vsb_width,
2293                                  int     hsb_height)
2294 {
2295         GtkBorder border;
2296         gint doc_width, doc_height;
2297         gdouble scale;
2298         gint other_page;
2299
2300         other_page = view->current_page ^ 1;
2301
2302         /* Find the largest of the two. */
2303         ev_page_cache_get_size (view->page_cache,
2304                                 view->current_page,
2305                                 1.0,
2306                                 &doc_width, &doc_height);
2307
2308         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
2309                 gint width_2, height_2;
2310                 ev_page_cache_get_size (view->page_cache,
2311                                         other_page,
2312                                         1.0,
2313                                         &width_2, &height_2);
2314                 if (width_2 > doc_width)
2315                         doc_width = width_2;
2316                 if (height_2 > doc_height)
2317                         doc_height = height_2;
2318         }
2319         compute_border (view, doc_width, doc_height, &border);
2320
2321         doc_width = doc_width * 2;
2322         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
2323         height -= (border.top + border.bottom + 2 * view->spacing);
2324
2325         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2326                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2327         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2328                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2329         else
2330                 g_assert_not_reached ();
2331
2332         ev_view_set_zoom (view, scale, FALSE);
2333 }
2334
2335 static void
2336 ev_view_zoom_for_size_single_page (EvView *view,
2337                                    int     width,
2338                                    int     height,
2339                                    int     vsb_width,
2340                                    int     hsb_height)
2341 {
2342         int doc_width, doc_height;
2343         GtkBorder border;
2344         gdouble scale;
2345
2346         ev_page_cache_get_size (view->page_cache,
2347                                 view->current_page,
2348                                 1.0,
2349                                 &doc_width,
2350                                 &doc_height);
2351         /* Get an approximate border */
2352         compute_border (view, width, height, &border);
2353
2354         width -= (border.left + border.right + 2 * view->spacing);
2355         height -= (border.top + border.bottom + 2 * view->spacing);
2356
2357         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2358                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2359         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2360                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2361         else
2362                 g_assert_not_reached ();
2363
2364         ev_view_set_zoom (view, scale, FALSE);
2365 }
2366
2367 void
2368 ev_view_set_zoom_for_size (EvView *view,
2369                            int     width,
2370                            int     height,
2371                            int     vsb_width,
2372                            int     hsb_height)
2373 {
2374         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2375                           view->sizing_mode == EV_SIZING_BEST_FIT);
2376         g_return_if_fail (width >= 0);
2377         g_return_if_fail (height >= 0);
2378
2379         if (view->document == NULL)
2380                 return;
2381
2382         if (view->presentation)
2383                 ev_view_zoom_for_size_presentation (view, width, height);
2384         else if (view->continuous && view->dual_page)
2385                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
2386         else if (view->continuous)
2387                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
2388         else if (view->dual_page)
2389                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
2390         else
2391                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
2392 }
2393
2394 /*** Status text messages ***/
2395
2396 const char *
2397 ev_view_get_status (EvView *view)
2398 {
2399         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2400
2401         return view->status;
2402 }
2403
2404 static void
2405 ev_view_set_status (EvView *view, const char *message)
2406 {
2407         g_return_if_fail (EV_IS_VIEW (view));
2408
2409         if (message != view->status) {
2410                 g_free (view->status);
2411                 view->status = g_strdup (message);
2412                 g_object_notify (G_OBJECT (view), "status");
2413         }
2414 }
2415
2416 static void
2417 update_find_status_message (EvView *view)
2418 {
2419         char *message;
2420
2421         if (view->current_page == view->find_page) {
2422                 int results;
2423
2424                 results = ev_document_find_get_n_results
2425                                 (EV_DOCUMENT_FIND (view->document),
2426                                  view->current_page);
2427                 /* TRANS: Sometimes this could be better translated as
2428                    "%d hit(s) on this page".  Therefore this string
2429                    contains plural cases. */
2430                 message = g_strdup_printf (ngettext ("%d found on this page",
2431                                                      "%d found on this page",
2432                                                      results),
2433                                            results);
2434         } else {
2435                 double percent;
2436
2437                 percent = ev_document_find_get_progress
2438                                 (EV_DOCUMENT_FIND (view->document));
2439                 if (percent >= (1.0 - 1e-10)) {
2440                         message = g_strdup (_("Not found"));
2441                 } else {
2442                         message = g_strdup_printf (_("%3d%% remaining to search"),
2443                                                    (int) ((1.0 - percent) * 100));
2444                 }
2445
2446         }
2447         ev_view_set_find_status (view, message);
2448 }
2449
2450 const char *
2451 ev_view_get_find_status (EvView *view)
2452 {
2453         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2454
2455         return view->find_status;
2456 }
2457
2458 static void
2459 ev_view_set_find_status (EvView *view, const char *message)
2460 {
2461         g_return_if_fail (EV_IS_VIEW (view));
2462
2463         g_free (view->find_status);
2464         view->find_status = g_strdup (message);
2465         g_object_notify (G_OBJECT (view), "find-status");
2466 }
2467
2468 /*** Find ***/
2469
2470 static void
2471 jump_to_find_result (EvView *view)
2472 {
2473         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2474         EvRectangle rect;
2475         GdkRectangle view_rect;
2476         int n_results;
2477         int page = view->find_page;
2478
2479         n_results = ev_document_find_get_n_results (find, page);
2480
2481         if (n_results > view->find_result) {
2482                 ev_document_find_get_result
2483                         (find, page, view->find_result, &rect);
2484
2485                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
2486                 ensure_rectangle_is_visible (view, &view_rect);
2487         }
2488 }
2489
2490 static void
2491 jump_to_find_page (EvView *view)
2492 {
2493         int n_pages, i;
2494
2495         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2496
2497         for (i = 0; i < n_pages; i++) {
2498                 int has_results;
2499                 int page;
2500
2501                 page = i + view->find_page;
2502                 if (page >= n_pages) {
2503                         page = page - n_pages;
2504                 }
2505
2506                 has_results = ev_document_find_page_has_results
2507                                 (EV_DOCUMENT_FIND (view->document), page);
2508                 if (has_results == -1) {
2509                         view->find_page = page;
2510                         break;
2511                 } else if (has_results == 1) {
2512                         ev_page_cache_set_current_page (view->page_cache, page);
2513                         jump_to_find_result (view);
2514                         break;
2515                 }
2516         }
2517 }
2518
2519 gboolean
2520 ev_view_can_find_next (EvView *view)
2521 {
2522         int n_results = 0;
2523
2524         if (EV_IS_DOCUMENT_FIND (view->document)) {
2525                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2526
2527                 n_results = ev_document_find_get_n_results (find, view->current_page);
2528         }
2529
2530         return n_results > 0;
2531 }
2532
2533 void
2534 ev_view_find_next (EvView *view)
2535 {
2536         EvPageCache *page_cache;
2537         int n_results, n_pages;
2538         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2539
2540         page_cache = ev_page_cache_get (view->document);
2541         n_results = ev_document_find_get_n_results (find, view->current_page);
2542
2543         n_pages = ev_page_cache_get_n_pages (page_cache);
2544
2545         view->find_result++;
2546
2547         if (view->find_result >= n_results) {
2548                 view->find_result = 0;
2549                 view->find_page++;
2550
2551                 if (view->find_page >= n_pages) {
2552                         view->find_page = 0;
2553                 }
2554
2555                 jump_to_find_page (view);
2556         } else {
2557                 jump_to_find_result (view);
2558                 gtk_widget_queue_draw (GTK_WIDGET (view));
2559         }
2560 }
2561
2562 void
2563 ev_view_find_previous (EvView *view)
2564 {
2565         int n_results, n_pages;
2566         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2567         EvPageCache *page_cache;
2568
2569         page_cache = ev_page_cache_get (view->document);
2570
2571         n_results = ev_document_find_get_n_results (find, view->current_page);
2572
2573         n_pages = ev_page_cache_get_n_pages (page_cache);
2574
2575         view->find_result--;
2576
2577         if (view->find_result < 0) {
2578                 view->find_result = 0;
2579                 view->find_page--;
2580
2581                 if (view->find_page < 0) {
2582                         view->find_page = n_pages - 1;
2583                 }
2584
2585                 jump_to_find_page (view);
2586         } else {
2587                 jump_to_find_result (view);
2588                 gtk_widget_queue_draw (GTK_WIDGET (view));
2589         }
2590 }
2591
2592 /*** Selections ***/
2593
2594 static void
2595 compute_selections (EvView *view, GdkRectangle *view_rect)
2596 {
2597         int n_pages, i;
2598
2599         clear_selection (view);
2600
2601         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2602         for (i = 0; i < n_pages; i++) {
2603                 GdkRectangle page_area;
2604                 GtkBorder border;
2605
2606                 if (get_page_extents (view, i, &page_area, &border)) {
2607                         GdkRectangle overlap;
2608
2609                         if (gdk_rectangle_intersect (&page_area, view_rect, &overlap)) {
2610                                 EvViewSelection *selection;
2611
2612                                 selection = g_new0 (EvViewSelection, 1);
2613                                 selection->page = i;
2614                                 view_rect_to_doc_rect (view, &overlap, &page_area,
2615                                                        &(selection->rect));
2616
2617                                 view->selections = g_list_append
2618                                                 (view->selections, selection);
2619                         }
2620                 }
2621         }
2622 }
2623
2624 static void
2625 clear_selection (EvView *view)
2626 {
2627         g_list_foreach (view->selections, (GFunc)g_free, NULL);
2628         view->selections = NULL;
2629 }
2630
2631
2632 void
2633 ev_view_select_all (EvView *view)
2634 {
2635         int n_pages, i;
2636
2637         clear_selection (view);
2638
2639         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2640         for (i = 0; i < n_pages; i++) {
2641                 int width, height;
2642                 EvViewSelection *selection;
2643
2644                 ev_page_cache_get_size (view->page_cache,
2645                                         i, 1.0, &width, &height);
2646
2647                 selection = g_new0 (EvViewSelection, 1);
2648                 selection->page = i;
2649                 selection->rect.x1 = selection->rect.y1 = 0;
2650                 selection->rect.x2 = width;
2651                 selection->rect.y2 = height;
2652
2653                 view->selections = g_list_append (view->selections, selection);
2654         }
2655
2656         gtk_widget_queue_draw (GTK_WIDGET (view));
2657 }
2658
2659 static char *
2660 get_selected_text (EvView *ev_view)
2661 {
2662         GString *text;
2663         GList *l;
2664
2665         text = g_string_new (NULL);
2666
2667         ev_document_doc_mutex_lock ();
2668
2669         for (l = ev_view->selections; l != NULL; l = l->next) {
2670                 EvViewSelection *selection = (EvViewSelection *)l->data;
2671                 char *tmp;
2672
2673                 tmp = ev_document_get_text (ev_view->document,
2674                                             selection->page,
2675                                             &selection->rect);
2676                 g_string_append (text, tmp);
2677                 g_free (tmp);
2678         }
2679
2680         ev_document_doc_mutex_unlock ();
2681
2682         return g_string_free (text, FALSE);
2683 }
2684
2685 void
2686 ev_view_copy (EvView *ev_view)
2687 {
2688         GtkClipboard *clipboard;
2689         char *text;
2690
2691         if (!ev_document_can_get_text (ev_view->document)) {
2692                 return;
2693         }
2694
2695         text = get_selected_text (ev_view);
2696         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
2697                                               GDK_SELECTION_CLIPBOARD);
2698         gtk_clipboard_set_text (clipboard, text, -1);
2699         g_free (text);
2700 }
2701
2702 static void
2703 ev_view_primary_get_cb (GtkClipboard     *clipboard,
2704                         GtkSelectionData *selection_data,
2705                         guint             info,
2706                         gpointer          data)
2707 {
2708         EvView *ev_view = EV_VIEW (data);
2709         char *text;
2710
2711         if (!ev_document_can_get_text (ev_view->document)) {
2712                 return;
2713         }
2714
2715         text = get_selected_text (ev_view);
2716         gtk_selection_data_set_text (selection_data, text, -1);
2717         g_free (text);
2718 }
2719
2720 static void
2721 ev_view_primary_clear_cb (GtkClipboard *clipboard,
2722                           gpointer      data)
2723 {
2724         EvView *view = EV_VIEW (data);
2725
2726         clear_selection (view);
2727 }
2728
2729 static void
2730 ev_view_update_primary_selection (EvView *ev_view)
2731 {
2732         GtkClipboard *clipboard;
2733
2734         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
2735                                               GDK_SELECTION_PRIMARY);
2736
2737         if (ev_view->selections) {
2738                 if (!gtk_clipboard_set_with_owner (clipboard,
2739                                                    targets,
2740                                                    G_N_ELEMENTS (targets),
2741                                                    ev_view_primary_get_cb,
2742                                                    ev_view_primary_clear_cb,
2743                                                    G_OBJECT (ev_view)))
2744                         ev_view_primary_clear_cb (clipboard, ev_view);
2745         } else {
2746                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
2747                         gtk_clipboard_clear (clipboard);
2748         }
2749 }
2750
2751 /*** Cursor operations ***/
2752
2753 static GdkCursor *
2754 ev_view_create_invisible_cursor(void)
2755 {
2756        GdkBitmap *empty;
2757        GdkColor black = { 0, 0, 0, 0 };
2758        static char bits[] = { 0x00 };
2759
2760        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
2761
2762        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
2763 }
2764
2765 static void
2766 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
2767 {
2768         GdkCursor *cursor = NULL;
2769         GdkDisplay *display;
2770         GtkWidget *widget;
2771
2772         if (view->cursor == new_cursor) {
2773                 return;
2774         }
2775
2776         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
2777         display = gtk_widget_get_display (widget);
2778         view->cursor = new_cursor;
2779
2780         switch (new_cursor) {
2781                 case EV_VIEW_CURSOR_NORMAL:
2782                         gdk_window_set_cursor (widget->window, NULL);
2783                         break;
2784                 case EV_VIEW_CURSOR_LINK:
2785                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
2786                         break;
2787                 case EV_VIEW_CURSOR_WAIT:
2788                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
2789                         break;
2790                 case EV_VIEW_CURSOR_HIDDEN:
2791                         cursor = ev_view_create_invisible_cursor ();
2792                         break;
2793                 case EV_VIEW_CURSOR_DRAG:
2794                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
2795                         break;
2796         }
2797
2798         if (cursor) {
2799                 gdk_window_set_cursor (widget->window, cursor);
2800                 gdk_cursor_unref (cursor);
2801                 gdk_flush();
2802         }
2803 }
2804
2805 void
2806 ev_view_hide_cursor (EvView *view)
2807 {
2808        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
2809 }
2810
2811 void
2812 ev_view_show_cursor (EvView *view)
2813 {
2814        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
2815 }
2816
2817 /*** Enum description for usage in signal ***/
2818
2819 GType
2820 ev_sizing_mode_get_type (void)
2821 {
2822   static GType etype = 0;
2823   if (etype == 0) {
2824     static const GEnumValue values[] = {
2825       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
2826       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
2827       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
2828       { 0, NULL, NULL }
2829     };
2830     etype = g_enum_register_static ("EvSizingMode", values);
2831   }
2832   return etype;
2833 }
2834