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 };
  48
  49 enum {
  50   TARGET_STRING,
  51   TARGET_TEXT,
  52   TARGET_COMPOUND_TEXT,
  53   TARGET_UTF8_STRING,
  54   TARGET_TEXT_BUFFER_CONTENTS
  55 };
  56
  57 enum {
  58         EV_SCROLL_PAGE_FORWARD,
  59         EV_SCROLL_PAGE_BACKWARD
  60 };
  61
  62 static const GtkTargetEntry targets[] = {
  63         { "STRING", 0, TARGET_STRING },
  64         { "TEXT",   0, TARGET_TEXT },
  65         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  66         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  67 };
  68
  69 typedef enum {
  70         EV_VIEW_CURSOR_NORMAL,
  71         EV_VIEW_CURSOR_LINK,
  72         EV_VIEW_CURSOR_WAIT,
  73         EV_VIEW_CURSOR_HIDDEN
  74 } EvViewCursor;
  75
  76 #define ZOOM_IN_FACTOR  1.2
  77 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  78
  79 #define MIN_SCALE 0.05409
  80 #define MAX_SCALE 18.4884
  81
  82 struct _EvView {
  83         GtkWidget parent_instance;
  84
  85         EvDocument *document;
  86
  87         GdkWindow *bin_window;
  88
  89         char *status;
  90         char *find_status;
  91
  92         int scroll_x;
  93         int scroll_y;
  94
  95         gboolean pressed_button;
  96         gboolean has_selection;
  97         GdkPoint selection_start;
  98         EvRectangle selection;
  99         EvViewCursor cursor;
 100
 101         GtkAdjustment *hadjustment;
 102         GtkAdjustment *vadjustment;
 103
 104         EvPageCache *page_cache;
 105         EvPixbufCache *pixbuf_cache;
 106
 107         gint current_page;
 108         EvJobRender *current_job;
 109
 110         int find_page;
 111         int find_result;
 112         int spacing;
 113
 114         double scale;
 115         int width;
 116         int height;
 117 };
 118
 119 struct _EvViewClass {
 120         GtkWidgetClass parent_class;
 121
 122         void    (*set_scroll_adjustments) (EvView         *view,
 123                                            GtkAdjustment  *hadjustment,
 124                                            GtkAdjustment  *vadjustment);
 125         void    (*scroll_view)            (EvView         *view,
 126                                            GtkScrollType   scroll,
 127                                            gboolean        horizontal);
 128
 129 };
 130
 131
 132 static void ev_view_set_scroll_adjustments (EvView         *view,
 133                                             GtkAdjustment  *hadjustment,
 134                                             GtkAdjustment  *vadjustment);
 135
 136 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 137
 138 /*** Helper functions ***/
 139
 140 static void
 141 view_update_adjustments (EvView *view)
 142 {
 143         int old_x = view->scroll_x;
 144         int old_y = view->scroll_y;
 145
 146         if (view->hadjustment)
 147                 view->scroll_x = view->hadjustment->value;
 148         else
 149                 view->scroll_x = 0;
 150
 151         if (view->vadjustment)
 152                 view->scroll_y = view->vadjustment->value;
 153         else
 154                 view->scroll_y = 0;
 155
 156         if (GTK_WIDGET_REALIZED (view) &&
 157             (view->scroll_x != old_x || view->scroll_y != old_y)) {
 158                 gdk_window_move (view->bin_window, - view->scroll_x, - view->scroll_y);
 159                 gdk_window_process_updates (view->bin_window, TRUE);
 160         }
 161 }
 162
 163 static void
 164 view_set_adjustment_values (EvView         *view,
 165                             GtkOrientation  orientation)
 166 {
 167         GtkWidget *widget = GTK_WIDGET (view);
 168         GtkAdjustment *adjustment;
 169         gboolean value_changed = FALSE;
 170         int requisition;
 171         int allocation;
 172
 173         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 174                 requisition = widget->requisition.width;
 175                 allocation = widget->allocation.width;
 176                 adjustment = view->hadjustment;
 177         } else {
 178                 requisition = widget->requisition.height;
 179                 allocation = widget->allocation.height;
 180                 adjustment = view->vadjustment;
 181         }
 182
 183         if (!adjustment)
 184                 return;
 185
 186         adjustment->page_size = allocation;
 187         adjustment->step_increment = allocation * 0.1;
 188         adjustment->page_increment = allocation * 0.9;
 189         adjustment->lower = 0;
 190         adjustment->upper = MAX (allocation, requisition);
 191
 192         if (adjustment->value > adjustment->upper - adjustment->page_size) {
 193                 adjustment->value = adjustment->upper - adjustment->page_size;
 194                 value_changed = TRUE;
 195         }
 196
 197         gtk_adjustment_changed (adjustment);
 198         if (value_changed)
 199                 gtk_adjustment_value_changed (adjustment);
 200 }
 201
 202 /*** Virtual function implementations ***/
 203
 204 static void
 205 ev_view_finalize (GObject *object)
 206 {
 207         EvView *view = EV_VIEW (object);
 208
 209         LOG ("Finalize");
 210
 211
 212         ev_view_set_scroll_adjustments (view, NULL, NULL);
 213
 214         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
 215 }
 216
 217 static void
 218 ev_view_destroy (GtkObject *object)
 219 {
 220         EvView *view = EV_VIEW (object);
 221
 222         if (view->document) {
 223                 g_object_unref (view->document);
 224                 view->document = NULL;
 225         }
 226         if (view->pixbuf_cache) {
 227                 g_object_unref (view->pixbuf_cache);
 228                 view->pixbuf_cache = NULL;
 229         }
 230         ev_view_set_scroll_adjustments (view, NULL, NULL);
 231
 232         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
 233 }
 234
 235 static void
 236 ev_view_get_offsets (EvView *view, int *x_offset, int *y_offset)
 237 {
 238         EvDocument *document = view->document;
 239         GtkWidget *widget = GTK_WIDGET (view);
 240         int width, height, target_width, target_height;
 241         GtkBorder border;
 242
 243         g_return_if_fail (EV_IS_DOCUMENT (document));
 244
 245         ev_page_cache_get_size (view->page_cache,
 246                                 view->current_page,
 247                                 view->scale,
 248                                 &width, &height);
 249
 250         ev_document_misc_get_page_border_size (width, height, &border);
 251
 252         *x_offset = view->spacing;
 253         *y_offset = view->spacing;
 254         target_width = width + border.left + border.right + view->spacing * 2;
 255         target_height = height + border.top + border.bottom + view->spacing * 2;
 256         *x_offset += MAX (0, (widget->allocation.width - target_width) / 2);
 257         *y_offset += MAX (0, (widget->allocation.height - target_height) / 2);
 258 }
 259
 260 static void
 261 view_rect_to_doc_rect (EvView *view, GdkRectangle *view_rect, EvRectangle *doc_rect)
 262 {
 263         int x_offset, y_offset;
 264
 265         ev_view_get_offsets (view, &x_offset, &y_offset);
 266         doc_rect->x1 = (double) (view_rect->x - x_offset) / view->scale;
 267         doc_rect->y1 = (double) (view_rect->y - y_offset) / view->scale;
 268         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 269         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 270 }
 271
 272 static void
 273 doc_rect_to_view_rect (EvView *view, EvRectangle *doc_rect, GdkRectangle *view_rect)
 274 {
 275         int x_offset, y_offset;
 276
 277         ev_view_get_offsets (view, &x_offset, &y_offset);
 278         view_rect->x = floor (doc_rect->x1 * view->scale) + x_offset;
 279         view_rect->y = floor (doc_rect->y1 * view->scale) + y_offset;
 280         view_rect->width = ceil (doc_rect->x2 * view->scale) + x_offset - view_rect->x;
 281         view_rect->height = ceil (doc_rect->y2 * view->scale) + y_offset - view_rect->y;
 282 }
 283
 284 static void
 285 compute_zoom_factor (EvView *view)
 286 {
 287         int doc_width, doc_height;
 288         double scale, scale_w, scale_h;
 289         GtkBorder border;
 290
 291         if (view->width <= 0 && view->height <= 0) {
 292                 return;
 293         }
 294
 295         doc_width = doc_height = 0;
 296         scale = scale_w = scale_h = 1.0;
 297         ev_page_cache_get_size (view->page_cache,
 298                                 view->current_page,
 299                                 1.0,
 300                                 &doc_width,
 301                                 &doc_height);
 302
 303         /* FIXME: The border size isn't constant.  Ugh.  Still, if we have extra
 304          * space, we just cut it from the border */
 305         ev_document_misc_get_page_border_size (doc_width, doc_height, &border);
 306
 307         if (doc_width == 0 || doc_height == 0) {
 308                 return;
 309         }
 310
 311         if (view->width >= 0) {
 312                 int target_width;
 313
 314                 target_width = view->width - (view->spacing * 2 + border.left + border.right);
 315                 scale = scale_w = (double)target_width / doc_width;
 316         }
 317
 318         if (view->height >= 0) {
 319                 int target_height;
 320
 321                 target_height = view->height - (view->spacing * 2 + border.top + border.bottom);
 322                 scale = scale_h = (double)target_height / doc_height;
 323         }
 324
 325         if (view->width >= 0 && view->height >= 0) {
 326                 scale = (scale_w < scale_h) ? scale_w : scale_h;
 327         }
 328
 329         view->scale = scale;
 330 }
 331
 332 /* Called by size_request to make sure we have appropriate jobs running.
 333  */
 334 static void
 335 ev_view_size_request (GtkWidget      *widget,
 336                       GtkRequisition *requisition)
 337 {
 338         EvView *view = EV_VIEW (widget);
 339         GtkBorder border;
 340         gint width, height;
 341
 342         if (!GTK_WIDGET_REALIZED (widget))
 343                 return;
 344
 345         if (!view->document) {
 346                 requisition->width = 1;
 347                 requisition->height = 1;
 348                 return;
 349         }
 350
 351         compute_zoom_factor (view);
 352
 353         ev_page_cache_get_size (view->page_cache,
 354                                 view->current_page,
 355                                 view->scale,
 356                                 &width, &height);
 357
 358         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 359                                         view->current_page,
 360                                         view->current_page,
 361                                         view->scale);
 362         ev_document_misc_get_page_border_size (width, height, &border);
 363
 364         if (view->width >= 0) {
 365                 requisition->width = 0;
 366         } else {
 367                 requisition->width = width + border.left + border.right +
 368                                      view->spacing * 2;
 369         }
 370
 371         if (view->height >= 0) {
 372                 requisition->height = 0;
 373         } else {
 374                 requisition->height = height + border.top + border.bottom +
 375                                       view->spacing * 2;
 376         }
 377 }
 378
 379 static void
 380 ev_view_size_allocate (GtkWidget      *widget,
 381                        GtkAllocation  *allocation)
 382 {
 383         EvView *view = EV_VIEW (widget);
 384
 385         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
 386
 387         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
 388         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
 389
 390         if (GTK_WIDGET_REALIZED (widget)) {
 391                 gdk_window_resize (view->bin_window,
 392                                    MAX (widget->allocation.width, widget->requisition.width),
 393                                    MAX (widget->allocation.height, widget->requisition.height));
 394         }
 395 }
 396
 397 static void
 398 ev_view_realize (GtkWidget *widget)
 399 {
 400         EvView *view = EV_VIEW (widget);
 401         GdkWindowAttr attributes;
 402
 403         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 404
 405
 406         attributes.window_type = GDK_WINDOW_CHILD;
 407         attributes.wclass = GDK_INPUT_OUTPUT;
 408         attributes.visual = gtk_widget_get_visual (widget);
 409         attributes.colormap = gtk_widget_get_colormap (widget);
 410
 411         attributes.x = widget->allocation.x;
 412         attributes.y = widget->allocation.y;
 413         attributes.width = widget->allocation.width;
 414         attributes.height = widget->allocation.height;
 415         attributes.event_mask = 0;
 416
 417         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
 418                                          &attributes,
 419                                          GDK_WA_X | GDK_WA_Y |
 420                                          GDK_WA_COLORMAP |
 421                                          GDK_WA_VISUAL);
 422         gdk_window_set_user_data (widget->window, widget);
 423         widget->style = gtk_style_attach (widget->style, widget->window);
 424         gdk_window_set_background (widget->window, &widget->style->mid[widget->state]);
 425
 426         attributes.x = 0;
 427         attributes.y = 0;
 428         attributes.width = MAX (widget->allocation.width, widget->requisition.width);
 429         attributes.height = MAX (widget->allocation.height, widget->requisition.height);
 430         attributes.event_mask = GDK_EXPOSURE_MASK |
 431                                 GDK_BUTTON_PRESS_MASK |
 432                                 GDK_BUTTON_RELEASE_MASK |
 433                                 GDK_SCROLL_MASK |
 434                                 GDK_KEY_PRESS_MASK |
 435                                 GDK_POINTER_MOTION_MASK |
 436                                 GDK_LEAVE_NOTIFY_MASK;
 437
 438         view->bin_window = gdk_window_new (widget->window,
 439                                            &attributes,
 440                                            GDK_WA_X | GDK_WA_Y |
 441                                            GDK_WA_COLORMAP |
 442                                            GDK_WA_VISUAL);
 443         gdk_window_set_user_data (view->bin_window, widget);
 444         gdk_window_show (view->bin_window);
 445
 446         widget->style = gtk_style_attach (widget->style, view->bin_window);
 447         gdk_window_set_background (view->bin_window, &widget->style->mid[widget->state]);
 448
 449         if (view->document) {
 450                 /* We can't get page size without a target, so we have to
 451                  * queue a size request at realization. Could be fixed
 452                  * with EvDocument changes to allow setting a GdkScreen
 453                  * without setting a target.
 454                  */
 455                 gtk_widget_queue_resize (widget);
 456         }
 457 }
 458
 459 static void
 460 ev_view_unrealize (GtkWidget *widget)
 461 {
 462         EvView *view = EV_VIEW (widget);
 463
 464         gdk_window_set_user_data (view->bin_window, NULL);
 465         gdk_window_destroy (view->bin_window);
 466         view->bin_window = NULL;
 467
 468         GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
 469 }
 470
 471 static guint32
 472 ev_gdk_color_to_rgb (const GdkColor *color)
 473 {
 474   guint32 result;
 475   result = (0xff0000 | (color->red & 0xff00));
 476   result <<= 8;
 477   result |= ((color->green & 0xff00) | (color->blue >> 8));
 478   return result;
 479 }
 480
 481 static void
 482 draw_rubberband (GtkWidget *widget, GdkWindow *window,
 483                  const GdkRectangle *rect, guchar alpha)
 484 {
 485         GdkGC *gc;
 486         GdkPixbuf *pixbuf;
 487         GdkColor *fill_color_gdk;
 488         guint fill_color;
 489
 490         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
 491         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
 492
 493         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
 494                                  rect->width, rect->height);
 495         gdk_pixbuf_fill (pixbuf, fill_color);
 496
 497         gdk_draw_pixbuf (window, NULL, pixbuf,
 498                          0, 0,
 499                          rect->x, rect->y,
 500                          rect->width, rect->height,
 501                          GDK_RGB_DITHER_NONE,
 502                          0, 0);
 503
 504         g_object_unref (pixbuf);
 505
 506         gc = gdk_gc_new (window);
 507         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
 508         gdk_draw_rectangle (window, gc, FALSE,
 509                             rect->x, rect->y,
 510                             rect->width - 1,
 511                             rect->height - 1);
 512         g_object_unref (gc);
 513
 514         gdk_color_free (fill_color_gdk);
 515 }
 516
 517 static void
 518 highlight_find_results (EvView *view)
 519 {
 520         EvDocumentFind *find;
 521         int i, results = 0;
 522
 523         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
 524
 525         find = EV_DOCUMENT_FIND (view->document);
 526
 527         g_mutex_lock (EV_DOC_MUTEX);
 528         results = ev_document_find_get_n_results (find, view->current_page);
 529         g_mutex_unlock (EV_DOC_MUTEX);
 530
 531         for (i = 0; i < results; i++) {
 532                 EvRectangle rectangle;
 533                 GdkRectangle view_rectangle;
 534                 guchar alpha;
 535
 536                 alpha = (i == view->find_result) ? 0x90 : 0x20;
 537                 g_mutex_lock (EV_DOC_MUTEX);
 538                 ev_document_find_get_result (find, view->current_page,
 539                                              i, &rectangle);
 540                 g_mutex_unlock (EV_DOC_MUTEX);
 541                 doc_rect_to_view_rect (view, &rectangle, &view_rectangle);
 542                 draw_rubberband (GTK_WIDGET (view), view->bin_window,
 543                                  &view_rectangle, alpha);
 544         }
 545 }
 546
 547
 548 static void
 549 expose_bin_window (GtkWidget      *widget,
 550                    GdkEventExpose *event)
 551 {
 552         EvView *view = EV_VIEW (widget);
 553         GtkBorder border;
 554         gint width, height;
 555         GdkRectangle area;
 556         int x_offset, y_offset;
 557         GdkPixbuf *scaled_image;
 558         GdkPixbuf *current_pixbuf;
 559
 560         if (view->document == NULL)
 561                 return;
 562
 563         ev_view_get_offsets (view, &x_offset, &y_offset);
 564         ev_page_cache_get_size (view->page_cache,
 565                                 view->current_page,
 566                                 view->scale,
 567                                 &width, &height);
 568
 569         ev_document_misc_get_page_border_size (width, height, &border);
 570
 571         /* Paint the frame */
 572         area.x = x_offset;
 573         area.y = y_offset;
 574         area.width = width + border.left + border.right;
 575         area.height = height + border.top + border.bottom;
 576         ev_document_misc_paint_one_page (view->bin_window, widget, &area, &border);
 577
 578         /* Render the document itself */
 579         LOG ("Render area %d %d %d %d - Offset %d %d",
 580              event->area.x, event->area.y,
 581              event->area.width, event->area.height,
 582              x_offset, y_offset);
 583
 584         current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, view->current_page);
 585
 586         if (current_pixbuf == NULL)
 587                 scaled_image = NULL;
 588         else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
 589                  height == gdk_pixbuf_get_height (current_pixbuf))
 590                 scaled_image = g_object_ref (current_pixbuf);
 591         else
 592                 scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
 593                                                         width, height,
 594                                                         GDK_INTERP_NEAREST);
 595         if (scaled_image) {
 596                 gdk_draw_pixbuf (view->bin_window,
 597                                  GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
 598                                  scaled_image,
 599                                  0, 0,
 600                                  area.x + border.left,
 601                                  area.y + border.top,
 602                                  width, height,
 603                                  GDK_RGB_DITHER_NORMAL,
 604                                  0, 0);
 605                 g_object_unref (scaled_image);
 606         }
 607
 608         if (EV_IS_DOCUMENT_FIND (view->document)) {
 609                 highlight_find_results (view);
 610         }
 611
 612         if (view->has_selection) {
 613                 GdkRectangle rubberband;
 614
 615                 doc_rect_to_view_rect (view, &view->selection, &rubberband);
 616                 if (rubberband.width > 0 && rubberband.height > 0) {
 617                         draw_rubberband (widget, view->bin_window,
 618                                          &rubberband, 0x40);
 619                 }
 620         }
 621 }
 622
 623 static gboolean
 624 ev_view_expose_event (GtkWidget      *widget,
 625                       GdkEventExpose *event)
 626 {
 627         EvView *view = EV_VIEW (widget);
 628
 629         if (event->window == view->bin_window)
 630                 expose_bin_window (widget, event);
 631         else
 632                 return GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event (widget, event);
 633
 634         return FALSE;
 635 }
 636
 637 void
 638 ev_view_select_all (EvView *ev_view)
 639 {
 640         GtkWidget *widget = GTK_WIDGET (ev_view);
 641         GdkRectangle selection;
 642         int width, height;
 643         int x_offset, y_offset;
 644         GtkBorder border;
 645
 646         g_return_if_fail (EV_IS_VIEW (ev_view));
 647
 648
 649         ev_view_get_offsets (ev_view, &x_offset, &y_offset);
 650         ev_page_cache_get_size (ev_view->page_cache,
 651                                 ev_view->current_page,
 652                                 ev_view->scale,
 653                                 &width, &height);
 654         ev_document_misc_get_page_border_size (width, height, &border);
 655
 656         ev_view->has_selection = TRUE;
 657         selection.x = x_offset + border.left;
 658         selection.y = y_offset + border.top;
 659         selection.width = width;
 660         selection.height = height;
 661         view_rect_to_doc_rect (ev_view, &selection, &ev_view->selection);
 662
 663         gtk_widget_queue_draw (widget);
 664 }
 665
 666 void
 667 ev_view_copy (EvView *ev_view)
 668 {
 669         GtkClipboard *clipboard;
 670         char *text;
 671
 672         if (!ev_document_can_get_text (ev_view->document)) {
 673                 return;
 674         }
 675
 676         g_mutex_lock (EV_DOC_MUTEX);
 677         text = ev_document_get_text (ev_view->document,
 678                                      ev_view->current_page,
 679                                      &ev_view->selection);
 680         g_mutex_unlock (EV_DOC_MUTEX);
 681
 682         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
 683                                               GDK_SELECTION_CLIPBOARD);
 684         gtk_clipboard_set_text (clipboard, text, -1);
 685         g_free (text);
 686 }
 687
 688 static void
 689 ev_view_primary_get_cb (GtkClipboard     *clipboard,
 690                         GtkSelectionData *selection_data,
 691                         guint             info,
 692                         gpointer          data)
 693 {
 694         EvView *ev_view = EV_VIEW (data);
 695         char *text;
 696
 697         if (!ev_document_can_get_text (ev_view->document)) {
 698                 return;
 699         }
 700
 701         g_mutex_lock (EV_DOC_MUTEX);
 702         text = ev_document_get_text (ev_view->document,
 703                                      ev_view->current_page,
 704                                      &ev_view->selection);
 705         g_mutex_unlock (EV_DOC_MUTEX);
 706         gtk_selection_data_set_text (selection_data, text, -1);
 707 }
 708
 709 static void
 710 ev_view_primary_clear_cb (GtkClipboard *clipboard,
 711                           gpointer      data)
 712 {
 713         EvView *ev_view = EV_VIEW (data);
 714
 715         ev_view->has_selection = FALSE;
 716 }
 717
 718 static void
 719 ev_view_update_primary_selection (EvView *ev_view)
 720 {
 721         GtkClipboard *clipboard;
 722
 723         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
 724                                               GDK_SELECTION_PRIMARY);
 725
 726         if (ev_view->has_selection) {
 727                 if (!gtk_clipboard_set_with_owner (clipboard,
 728                                                    targets,
 729                                                    G_N_ELEMENTS (targets),
 730                                                    ev_view_primary_get_cb,
 731                                                    ev_view_primary_clear_cb,
 732                                                    G_OBJECT (ev_view)))
 733                         ev_view_primary_clear_cb (clipboard, ev_view);
 734         } else {
 735                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
 736                         gtk_clipboard_clear (clipboard);
 737         }
 738 }
 739
 740 static gboolean
 741 ev_view_button_press_event (GtkWidget      *widget,
 742                             GdkEventButton *event)
 743 {
 744         EvView *view = EV_VIEW (widget);
 745
 746         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
 747                 gtk_widget_grab_focus (widget);
 748         }
 749
 750         view->pressed_button = event->button;
 751
 752         switch (event->button) {
 753                 case 1:
 754                         if (view->has_selection) {
 755                                 view->has_selection = FALSE;
 756                                 gtk_widget_queue_draw (widget);
 757                         }
 758
 759                         view->selection_start.x = event->x;
 760                         view->selection_start.y = event->y;
 761                         break;
 762         }
 763
 764         return TRUE;
 765 }
 766
 767 static char *
 768 status_message_from_link (EvView *view, EvLink *link)
 769 {
 770         EvLinkType type;
 771         char *msg = NULL;
 772         char *page_label;
 773
 774         type = ev_link_get_link_type (link);
 775
 776         switch (type) {
 777                 case EV_LINK_TYPE_TITLE:
 778                         if (ev_link_get_title (link))
 779                                 msg = g_strdup (ev_link_get_title (link));
 780                         break;
 781                 case EV_LINK_TYPE_PAGE:
 782                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
 783                         msg = g_strdup_printf (_("Go to page %s"), page_label);
 784                         g_free (page_label);
 785                         break;
 786                 case EV_LINK_TYPE_EXTERNAL_URI:
 787                         msg = g_strdup (ev_link_get_uri (link));
 788                         break;
 789                 default:
 790                         break;
 791         }
 792
 793         return msg;
 794 }
 795
 796 static void
 797 ev_view_set_status (EvView *view, const char *message)
 798 {
 799         g_return_if_fail (EV_IS_VIEW (view));
 800
 801         if (message != view->status) {
 802                 g_free (view->status);
 803                 view->status = g_strdup (message);
 804                 g_object_notify (G_OBJECT (view), "status");
 805         }
 806 }
 807
 808 static void
 809 ev_view_set_find_status (EvView *view, const char *message)
 810 {
 811         g_return_if_fail (EV_IS_VIEW (view));
 812
 813         g_free (view->find_status);
 814         view->find_status = g_strdup (message);
 815         g_object_notify (G_OBJECT (view), "find-status");
 816 }
 817
 818 static GdkCursor *
 819 ev_view_create_invisible_cursor(void)
 820 {
 821        GdkBitmap *empty;
 822        GdkColor black = { 0, 0, 0, 0 };
 823        static char bits[] = { 0x00 };
 824
 825        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
 826
 827        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
 828 }
 829
 830 static void
 831 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
 832 {
 833         GdkCursor *cursor = NULL;
 834         GdkDisplay *display;
 835         GtkWidget *widget;
 836
 837         if (view->cursor == new_cursor) {
 838                 return;
 839         }
 840
 841         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
 842         display = gtk_widget_get_display (widget);
 843         view->cursor = new_cursor;
 844
 845         switch (new_cursor) {
 846                 case EV_VIEW_CURSOR_NORMAL:
 847                         gdk_window_set_cursor (widget->window, NULL);
 848                         break;
 849                 case EV_VIEW_CURSOR_LINK:
 850                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
 851                         break;
 852                 case EV_VIEW_CURSOR_WAIT:
 853                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
 854                         break;
 855                 case EV_VIEW_CURSOR_HIDDEN:
 856                         cursor = ev_view_create_invisible_cursor ();
 857                         break;
 858
 859         }
 860
 861         if (cursor) {
 862                 gdk_window_set_cursor (widget->window, cursor);
 863                 gdk_cursor_unref (cursor);
 864                 gdk_flush();
 865         }
 866 }
 867
 868
 869 static void
 870 find_page_at_location (EvView  *view,
 871                        gdouble  x,
 872                        gdouble  y,
 873                        gint    *page,
 874                        gint    *x_offset,
 875                        gint    *y_offset)
 876 {
 877         GtkBorder border;
 878         gint width, height;
 879
 880         ev_page_cache_get_size (view->page_cache,
 881                                 view->current_page,
 882                                 view->scale,
 883                                 &width, &height);
 884         ev_document_misc_get_page_border_size (width, height, &border);
 885
 886         x -= (border.left + view->spacing);
 887         y -= (border.top + view->spacing);
 888
 889         if ((x < 0) || (y < 0) ||
 890             (x >= width) || (y >= height)) {
 891                 *page = -1;
 892                 return;
 893         }
 894         *page = view->current_page;
 895         *x_offset = (gint) x;
 896         *y_offset = (gint) y;
 897 }
 898
 899 static EvLink *
 900 get_link_at_location (EvView  *view,
 901                       gdouble  x,
 902                       gdouble  y)
 903 {
 904         gint page;
 905         gint x_offset, y_offset;
 906         GList *link_mapping;
 907
 908         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
 909         if (page == -1)
 910                 return NULL;
 911
 912         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
 913
 914         return ev_link_mapping_find (link_mapping, x_offset /view->scale, y_offset /view->scale);
 915 }
 916
 917
 918 static gboolean
 919 ev_view_motion_notify_event (GtkWidget      *widget,
 920                              GdkEventMotion *event)
 921 {
 922         EvView *view = EV_VIEW (widget);
 923
 924         if (view->pressed_button > 0) {
 925                 GdkRectangle selection;
 926
 927                 view->has_selection = TRUE;
 928                 selection.x = MIN (view->selection_start.x, event->x);
 929                 selection.y = MIN (view->selection_start.y, event->y);
 930                 selection.width = ABS (view->selection_start.x - event->x) + 1;
 931                 selection.height = ABS (view->selection_start.y - event->y) + 1;
 932                 view_rect_to_doc_rect (view, &selection, &view->selection);
 933
 934                 gtk_widget_queue_draw (widget);
 935         } else if (view->document) {
 936                 EvLink *link;
 937
 938                 link = get_link_at_location (view, event->x, event->y);
 939                 if (link) {
 940                         char *msg;
 941
 942                         msg = status_message_from_link (view, link);
 943                         ev_view_set_status (view, msg);
 944                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
 945                         g_free (msg);
 946                 } else {
 947                         ev_view_set_status (view, NULL);
 948                         if (view->cursor == EV_VIEW_CURSOR_LINK) {
 949                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
 950                         }
 951                 }
 952         }
 953
 954         return TRUE;
 955 }
 956
 957 static gboolean
 958 ev_view_button_release_event (GtkWidget      *widget,
 959                               GdkEventButton *event)
 960 {
 961         EvView *view = EV_VIEW (widget);
 962
 963         view->pressed_button = -1;
 964
 965         if (view->has_selection) {
 966                 ev_view_update_primary_selection (view);
 967         } else if (view->document) {
 968                 EvLink *link;
 969
 970                 link = get_link_at_location (view, event->x, event->y);
 971                 if (link) {
 972                         ev_view_go_to_link (view, link);
 973                 }
 974         }
 975
 976         return FALSE;
 977 }
 978
 979 static void
 980 on_adjustment_value_changed (GtkAdjustment  *adjustment,
 981                              EvView *view)
 982 {
 983         view_update_adjustments (view);
 984 }
 985
 986 static void
 987 set_scroll_adjustment (EvView *view,
 988                        GtkOrientation  orientation,
 989                        GtkAdjustment  *adjustment)
 990 {
 991         GtkAdjustment **to_set;
 992
 993         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 994                 to_set = &view->hadjustment;
 995         else
 996                 to_set = &view->vadjustment;
 997
 998         if (*to_set != adjustment) {
 999                 if (*to_set) {
1000                         g_signal_handlers_disconnect_by_func (*to_set,
1001                                                               (gpointer) on_adjustment_value_changed,
1002                                                               view);
1003                         g_object_unref (*to_set);
1004                 }
1005
1006                 *to_set = adjustment;
1007                 view_set_adjustment_values (view, orientation);
1008
1009                 if (*to_set) {
1010                         g_object_ref (*to_set);
1011                         g_signal_connect (*to_set, "value_changed",
1012                                           G_CALLBACK (on_adjustment_value_changed), view);
1013                 }
1014         }
1015 }
1016
1017 static void
1018 ev_view_set_scroll_adjustments (EvView *view,
1019                                 GtkAdjustment  *hadjustment,
1020                                 GtkAdjustment  *vadjustment)
1021 {
1022         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
1023         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
1024
1025         view_update_adjustments (view);
1026 }
1027
1028 static void
1029 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
1030                            guint           keyval,
1031                            GtkScrollType   scroll,
1032                            gboolean        horizontal)
1033 {
1034   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
1035
1036   gtk_binding_entry_add_signal (binding_set, keyval, 0,
1037                                 "scroll_view", 2,
1038                                 GTK_TYPE_SCROLL_TYPE, scroll,
1039                                 G_TYPE_BOOLEAN, horizontal);
1040   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
1041                                 "scroll_view", 2,
1042                                 GTK_TYPE_SCROLL_TYPE, scroll,
1043                                 G_TYPE_BOOLEAN, horizontal);
1044 }
1045
1046 static void
1047 add_scroll_binding_shifted (GtkBindingSet  *binding_set,
1048                             guint           keyval,
1049                             GtkScrollType   scroll_normal,
1050                             GtkScrollType   scroll_shifted,
1051                             gboolean        horizontal)
1052 {
1053   gtk_binding_entry_add_signal (binding_set, keyval, 0,
1054                                 "scroll_view", 2,
1055                                 GTK_TYPE_SCROLL_TYPE, scroll_normal,
1056                                 G_TYPE_BOOLEAN, horizontal);
1057   gtk_binding_entry_add_signal (binding_set, keyval, GDK_SHIFT_MASK,
1058                                 "scroll_view", 2,
1059                                 GTK_TYPE_SCROLL_TYPE, scroll_shifted,
1060                                 G_TYPE_BOOLEAN, horizontal);
1061 }
1062
1063 static void
1064 ev_view_jump (EvView        *view,
1065               GtkScrollType  scroll)
1066 {
1067         GtkAdjustment *adjustment;
1068         double value, increment;
1069         gboolean first_page = FALSE;
1070         gboolean last_page = FALSE;
1071
1072         /* Assign values for increment and vertical adjustment */
1073         adjustment = view->vadjustment;
1074         increment = adjustment->page_size * 0.75;
1075         value = adjustment->value;
1076
1077         /* Assign boolean for first and last page */
1078         if (view->current_page == 0)
1079                 first_page = TRUE;
1080         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
1081                 last_page = TRUE;
1082
1083         switch (scroll) {
1084                 case EV_SCROLL_PAGE_BACKWARD:
1085                         /* Do not jump backwards if at the first page */
1086                         if (value == (adjustment->lower) && first_page) {
1087                                 /* Do nothing */
1088                                 /* At the top of a page, assign the upper bound limit of previous page */
1089                         } else if (value == (adjustment->lower)) {
1090                                 value = adjustment->upper - adjustment->page_size;
1091                                 ev_page_cache_set_current_page (view->page_cache, view->current_page - 1);
1092                                 /* Jump to the top */
1093                         } else {
1094                                 value = MAX (value - increment, adjustment->lower);
1095                         }
1096                         break;
1097                 case EV_SCROLL_PAGE_FORWARD:
1098                         /* Do not jump forward if at the last page */
1099                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
1100                                 /* Do nothing */
1101                         /* At the bottom of a page, assign the lower bound limit of next page */
1102                         } else if (value == (adjustment->upper - adjustment->page_size)) {
1103                                 value = 0;
1104                                 ev_page_cache_set_current_page (view->page_cache, view->current_page + 1);
1105                         /* Jump to the bottom */
1106                         } else {
1107                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
1108                         }
1109                         break;
1110                 default:
1111                         break;
1112         }
1113
1114         gtk_adjustment_set_value (adjustment, value);
1115 }
1116
1117 static void
1118 ev_view_scroll_view (EvView *view,
1119                      GtkScrollType scroll,
1120                      gboolean horizontal)
1121 {
1122         if (scroll == GTK_SCROLL_PAGE_BACKWARD) {
1123                 ev_page_cache_prev_page (view->page_cache);
1124         } else if (scroll == GTK_SCROLL_PAGE_FORWARD) {
1125                 ev_page_cache_next_page (view->page_cache);
1126         } else if (scroll == EV_SCROLL_PAGE_BACKWARD || scroll == EV_SCROLL_PAGE_FORWARD) {
1127                 ev_view_jump (view, scroll);
1128         } else {
1129                 GtkAdjustment *adjustment;
1130                 double value;
1131
1132                 if (horizontal) {
1133                         adjustment = view->hadjustment;
1134                 } else {
1135                         adjustment = view->vadjustment;
1136                 }
1137
1138                 value = adjustment->value;
1139
1140                 switch (scroll) {
1141                         case GTK_SCROLL_STEP_BACKWARD:
1142                                 value -= adjustment->step_increment;
1143                                 break;
1144                         case GTK_SCROLL_STEP_FORWARD:
1145                                 value += adjustment->step_increment;
1146                                 break;
1147                         default:
1148                                 break;
1149                 }
1150
1151                 value = CLAMP (value, adjustment->lower,
1152                                adjustment->upper - adjustment->page_size);
1153
1154                 gtk_adjustment_set_value (adjustment, value);
1155         }
1156 }
1157
1158 static void
1159 ev_view_set_property (GObject *object,
1160                       guint prop_id,
1161                       const GValue *value,
1162                       GParamSpec *pspec)
1163 {
1164         switch (prop_id)
1165         {
1166                 /* Read only */
1167                 case PROP_STATUS:
1168                 case PROP_FIND_STATUS:
1169                         break;
1170         }
1171 }
1172
1173 static void
1174 ev_view_get_property (GObject *object,
1175                       guint prop_id,
1176                       GValue *value,
1177                       GParamSpec *pspec)
1178 {
1179         EvView *view = EV_VIEW (object);
1180
1181         switch (prop_id)
1182         {
1183                 case PROP_STATUS:
1184                         g_value_set_string (value, view->status);
1185                         break;
1186                 case PROP_FIND_STATUS:
1187                         g_value_set_string (value, view->status);
1188                         break;
1189         }
1190 }
1191
1192 static void
1193 ev_view_class_init (EvViewClass *class)
1194 {
1195         GObjectClass *object_class = G_OBJECT_CLASS (class);
1196         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
1197         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
1198         GtkBindingSet *binding_set;
1199
1200         object_class->finalize = ev_view_finalize;
1201         object_class->set_property = ev_view_set_property;
1202         object_class->get_property = ev_view_get_property;
1203
1204         widget_class->expose_event = ev_view_expose_event;
1205         widget_class->button_press_event = ev_view_button_press_event;
1206         widget_class->motion_notify_event = ev_view_motion_notify_event;
1207         widget_class->button_release_event = ev_view_button_release_event;
1208         widget_class->size_request = ev_view_size_request;
1209         widget_class->size_allocate = ev_view_size_allocate;
1210         widget_class->realize = ev_view_realize;
1211         widget_class->unrealize = ev_view_unrealize;
1212         gtk_object_class->destroy = ev_view_destroy;
1213
1214         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
1215         class->scroll_view = ev_view_scroll_view;
1216
1217         widget_class->set_scroll_adjustments_signal =  g_signal_new ("set-scroll-adjustments",
1218                                                                      G_OBJECT_CLASS_TYPE (object_class),
1219                                                                      G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1220                                                                      G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
1221                                                                      NULL, NULL,
1222                                                                      ev_marshal_VOID__OBJECT_OBJECT,
1223                                                                      G_TYPE_NONE, 2,
1224                                                                      GTK_TYPE_ADJUSTMENT,
1225                                                                      GTK_TYPE_ADJUSTMENT);
1226
1227         g_signal_new ("scroll_view",
1228                       G_TYPE_FROM_CLASS (object_class),
1229                       G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1230                       G_STRUCT_OFFSET (EvViewClass, scroll_view),
1231                       NULL, NULL,
1232                       ev_marshal_VOID__ENUM_BOOLEAN,
1233                       G_TYPE_NONE, 2,
1234                       GTK_TYPE_SCROLL_TYPE,
1235                       G_TYPE_BOOLEAN);
1236
1237         g_object_class_install_property (object_class,
1238                                          PROP_STATUS,
1239                                          g_param_spec_string ("status",
1240                                                               "Status Message",
1241                                                               "The status message",
1242                                                               NULL,
1243                                                               G_PARAM_READABLE));
1244
1245         g_object_class_install_property (object_class,
1246                                          PROP_FIND_STATUS,
1247                                          g_param_spec_string ("find-status",
1248                                                               "Find Status Message",
1249                                                               "The find status message",
1250                                                               NULL,
1251                                                               G_PARAM_READABLE));
1252
1253         binding_set = gtk_binding_set_by_class (class);
1254
1255         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
1256         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
1257         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
1258         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
1259
1260         add_scroll_binding_keypad (binding_set, GDK_Page_Up,   GTK_SCROLL_PAGE_BACKWARD, FALSE);
1261         add_scroll_binding_keypad (binding_set, GDK_Page_Down, GTK_SCROLL_PAGE_FORWARD,  FALSE);
1262
1263         add_scroll_binding_shifted (binding_set, GDK_space, EV_SCROLL_PAGE_FORWARD, EV_SCROLL_PAGE_BACKWARD, FALSE);
1264         add_scroll_binding_shifted (binding_set, GDK_BackSpace, EV_SCROLL_PAGE_BACKWARD, EV_SCROLL_PAGE_FORWARD, FALSE);
1265 }
1266
1267 static void
1268 ev_view_init (EvView *view)
1269 {
1270         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
1271
1272         view->spacing = 10;
1273         view->scale = 1.0;
1274         view->current_page = 0;
1275         view->pressed_button = -1;
1276         view->cursor = EV_VIEW_CURSOR_NORMAL;
1277 }
1278
1279 static void
1280 update_find_status_message (EvView *view)
1281 {
1282         char *message;
1283
1284 //      g_mutex_lock (EV_DOC_MUTEX);
1285         if (view->current_page == view->find_page) {
1286                 int results;
1287
1288 //              g_mutex_lock (EV_DOC_MUTEX);
1289                 results = ev_document_find_get_n_results
1290                                 (EV_DOCUMENT_FIND (view->document),
1291                                  view->current_page);
1292 //              g_mutex_unlock (EV_DOC_MUTEX);
1293                 /* TRANS: Sometimes this could be better translated as
1294                    "%d hit(s) on this page".  Therefore this string
1295                    contains plural cases. */
1296                 message = g_strdup_printf (ngettext ("%d found on this page",
1297                                                      "%d found on this page",
1298                                                      results),
1299                                            results);
1300         } else {
1301                 double percent;
1302
1303                 g_mutex_lock (EV_DOC_MUTEX);
1304                 percent = ev_document_find_get_progress
1305                                 (EV_DOCUMENT_FIND (view->document));
1306                 g_mutex_unlock (EV_DOC_MUTEX);
1307                 if (percent >= (1.0 - 1e-10)) {
1308                         message = g_strdup (_("Not found"));
1309                 } else {
1310                         message = g_strdup_printf (_("%3d%% remaining to search"),
1311                                                    (int) ((1.0 - percent) * 100));
1312                 }
1313
1314         }
1315 //      g_mutex_unlock (EV_DOC_MUTEX);
1316
1317         ev_view_set_find_status (view, message);
1318 //      g_free (message);
1319 }
1320
1321 #define MARGIN 5
1322
1323 static void
1324 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
1325 {
1326         GtkWidget *widget = GTK_WIDGET (view);
1327         GtkAdjustment *adjustment;
1328         int value;
1329
1330         adjustment = view->vadjustment;
1331
1332         if (rect->y < adjustment->value) {
1333                 value = MAX (adjustment->lower, rect->y - MARGIN);
1334                 gtk_adjustment_set_value (view->vadjustment, value);
1335         } else if (rect->y + rect->height >
1336                    adjustment->value + widget->allocation.height) {
1337                 value = MIN (adjustment->upper, rect->y + rect->height -
1338                              widget->allocation.height + MARGIN);
1339                 gtk_adjustment_set_value (view->vadjustment, value);
1340         }
1341
1342         adjustment = view->hadjustment;
1343
1344         if (rect->x < adjustment->value) {
1345                 value = MAX (adjustment->lower, rect->x - MARGIN);
1346                 gtk_adjustment_set_value (view->hadjustment, value);
1347         } else if (rect->x + rect->height >
1348                    adjustment->value + widget->allocation.width) {
1349                 value = MIN (adjustment->upper, rect->x + rect->width -
1350                              widget->allocation.width + MARGIN);
1351                 gtk_adjustment_set_value (view->hadjustment, value);
1352         }
1353 }
1354
1355 static void
1356 jump_to_find_result (EvView *view)
1357 {
1358         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
1359         EvRectangle rect;
1360         GdkRectangle view_rect;
1361         int n_results;
1362
1363         g_mutex_lock (EV_DOC_MUTEX);
1364         n_results = ev_document_find_get_n_results (find, view->current_page);
1365         g_mutex_unlock (EV_DOC_MUTEX);
1366
1367         if (n_results > view->find_result) {
1368                 g_mutex_lock (EV_DOC_MUTEX);
1369                 ev_document_find_get_result
1370                         (find, view->current_page, view->find_result, &rect);
1371                 g_mutex_unlock (EV_DOC_MUTEX);
1372
1373                 doc_rect_to_view_rect (view, &rect, &view_rect);
1374                 ensure_rectangle_is_visible (view, &view_rect);
1375         }
1376 }
1377
1378 static void
1379 jump_to_find_page (EvView *view)
1380 {
1381         int n_pages, i;
1382
1383         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1384
1385         for (i = 0; i < n_pages; i++) {
1386                 int has_results;
1387                 int page;
1388
1389                 page = i + view->find_page;
1390                 if (page >= n_pages) {
1391                         page = page - n_pages;
1392                 }
1393
1394                 //              g_mutex_lock (EV_DOC_MUTEX);
1395                 has_results = ev_document_find_page_has_results
1396                                 (EV_DOCUMENT_FIND (view->document), page);
1397                 if (has_results == -1) {
1398                         view->find_page = page;
1399                         break;
1400                 } else if (has_results == 1) {
1401                         ev_page_cache_set_current_page (view->page_cache, page);
1402                         jump_to_find_result (view);
1403                         break;
1404                 }
1405         }
1406 }
1407
1408 static void
1409 find_changed_cb (EvDocument *document, int page, EvView *view)
1410 {
1411         jump_to_find_page (view);
1412         jump_to_find_result (view);
1413         update_find_status_message (view);
1414
1415         if (view->current_page == page)
1416                 gtk_widget_queue_draw (GTK_WIDGET (view));
1417 }
1418 /*** Public API ***/
1419
1420 GtkWidget*
1421 ev_view_new (void)
1422 {
1423         return g_object_new (EV_TYPE_VIEW, NULL);
1424 }
1425
1426 static void
1427 job_finished_cb (EvPixbufCache *pixbuf_cache,
1428                  EvView        *view)
1429 {
1430         gtk_widget_queue_draw (GTK_WIDGET (view));
1431 }
1432
1433
1434 static void
1435 page_changed_cb (EvPageCache *page_cache,
1436                  int          new_page,
1437                  EvView      *view)
1438 {
1439         int old_page = view->current_page;
1440         int old_width, old_height;
1441         int new_width, new_height;
1442
1443         if (old_page == new_page)
1444                 return;
1445
1446         ev_page_cache_get_size (page_cache,
1447                                 old_page,
1448                                 view->scale,
1449                                 &old_width, &old_height);
1450         ev_page_cache_get_size (page_cache,
1451                                 new_page,
1452                                 view->scale,
1453                                 &new_width, &new_height);
1454
1455         if (view->cursor != EV_VIEW_CURSOR_HIDDEN) {
1456                 //ev_view_set_cursor (view, EV_VIEW_CURSOR_WAIT);
1457         }
1458
1459         view->current_page = new_page;
1460         view->has_selection = FALSE;
1461
1462         compute_zoom_factor (view);
1463
1464         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
1465                                         view->current_page,
1466                                         view->current_page,
1467                                         view->scale);
1468
1469         if (new_width != old_width || new_height != old_height)
1470                 gtk_widget_queue_resize (GTK_WIDGET (view));
1471         else
1472                 gtk_widget_queue_draw (GTK_WIDGET (view));
1473
1474         gtk_adjustment_set_value (view->vadjustment,
1475                                   view->vadjustment->lower);
1476
1477         if (EV_IS_DOCUMENT_FIND (view->document)) {
1478                 view->find_page = new_page;
1479                 view->find_result = 0;
1480                 update_find_status_message (view);
1481         }
1482 }
1483
1484 void
1485 ev_view_set_document (EvView     *view,
1486                       EvDocument *document)
1487 {
1488         g_return_if_fail (EV_IS_VIEW (view));
1489
1490         if (document != view->document) {
1491                 if (view->document) {
1492                         g_signal_handlers_disconnect_by_func (view->document,
1493                                                               find_changed_cb,
1494                                                               view);
1495                         g_object_unref (view->document);
1496                         view->page_cache = NULL;
1497
1498                 }
1499
1500                 view->document = document;
1501                 view->find_page = 0;
1502                 view->find_result = 0;
1503
1504                 if (view->document) {
1505                         g_object_ref (view->document);
1506                         if (EV_IS_DOCUMENT_FIND (view->document)) {
1507                                 g_signal_connect (view->document,
1508                                                   "find_changed",
1509                                                   G_CALLBACK (find_changed_cb),
1510                                                   view);
1511                         }
1512                         view->page_cache = ev_document_get_page_cache (view->document);
1513                         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
1514                         view->pixbuf_cache = ev_pixbuf_cache_new (view->document);
1515                         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
1516                 }
1517
1518                 gtk_widget_queue_resize (GTK_WIDGET (view));
1519         }
1520 }
1521
1522 int
1523 ev_view_get_page        (EvView     *view)
1524 {
1525         return view->current_page;
1526 }
1527
1528 static void
1529 go_to_link (EvView *view, EvLink *link)
1530 {
1531         EvLinkType type;
1532         const char *uri;
1533         int page;
1534
1535         type = ev_link_get_link_type (link);
1536
1537         switch (type) {
1538                 case EV_LINK_TYPE_TITLE:
1539                         break;
1540                 case EV_LINK_TYPE_PAGE:
1541                         page = ev_link_get_page (link);
1542                         ev_page_cache_set_current_page (view->page_cache, page);
1543                         break;
1544                 case EV_LINK_TYPE_EXTERNAL_URI:
1545                         uri = ev_link_get_uri (link);
1546                         gnome_vfs_url_show (uri);
1547                         break;
1548         }
1549 }
1550
1551 void
1552 ev_view_go_to_link (EvView *view, EvLink *link)
1553 {
1554         go_to_link (view, link);
1555 }
1556
1557 static void
1558 ev_view_zoom (EvView   *view,
1559               double    factor,
1560               gboolean  relative)
1561 {
1562         double scale;
1563
1564         if (relative)
1565                 scale = view->scale * factor;
1566         else
1567                 scale = factor;
1568
1569         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
1570
1571         view->scale = scale;
1572         view->width = view->height = -1;
1573         gtk_widget_queue_resize (GTK_WIDGET (view));
1574 }
1575
1576 void
1577 ev_view_zoom_in (EvView *view)
1578 {
1579         ev_view_zoom (view, ZOOM_IN_FACTOR, TRUE);
1580 }
1581
1582 void
1583 ev_view_zoom_out (EvView *view)
1584 {
1585         ev_view_zoom (view, ZOOM_OUT_FACTOR, TRUE);
1586 }
1587
1588 void
1589 ev_view_set_size (EvView     *view,
1590                   int         width,
1591                   int         height)
1592 {
1593         if (!view->document) {
1594                 return;
1595         }
1596
1597         if (width != view->width || height != view->height) {
1598                 view->width = width;
1599                 view->height = height;
1600                 gtk_widget_queue_resize (GTK_WIDGET (view));
1601         }
1602 }
1603
1604 const char *
1605 ev_view_get_status (EvView *view)
1606 {
1607         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
1608
1609         return view->status;
1610 }
1611
1612 const char *
1613 ev_view_get_find_status (EvView *view)
1614 {
1615         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
1616
1617         return view->find_status;
1618 }
1619
1620 gboolean
1621 ev_view_can_find_next (EvView *view)
1622 {
1623         int n_results = 0;
1624
1625         if (EV_IS_DOCUMENT_FIND (view->document)) {
1626                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
1627
1628                 g_mutex_lock (EV_DOC_MUTEX);
1629                 n_results = ev_document_find_get_n_results (find, view->current_page);
1630                 g_mutex_unlock (EV_DOC_MUTEX);
1631         }
1632
1633         return n_results > 0;
1634 }
1635
1636 void
1637 ev_view_find_next (EvView *view)
1638 {
1639         EvPageCache *page_cache;
1640         int n_results, n_pages;
1641         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
1642
1643         page_cache = ev_document_get_page_cache (view->document);
1644         g_mutex_lock (EV_DOC_MUTEX);
1645         n_results = ev_document_find_get_n_results (find, view->current_page);
1646         g_mutex_unlock (EV_DOC_MUTEX);
1647
1648         n_pages = ev_page_cache_get_n_pages (page_cache);
1649
1650         view->find_result++;
1651
1652         if (view->find_result >= n_results) {
1653                 view->find_result = 0;
1654                 view->find_page++;
1655
1656                 if (view->find_page >= n_pages) {
1657                         view->find_page = 0;
1658                 }
1659
1660                 jump_to_find_page (view);
1661         } else {
1662                 jump_to_find_result (view);
1663                 gtk_widget_queue_draw (GTK_WIDGET (view));
1664         }
1665 }
1666
1667 void
1668 ev_view_find_previous (EvView *view)
1669 {
1670         int n_results, n_pages;
1671         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
1672         EvPageCache *page_cache;
1673
1674         page_cache = ev_document_get_page_cache (view->document);
1675
1676         g_mutex_lock (EV_DOC_MUTEX);
1677         n_results = ev_document_find_get_n_results (find, view->current_page);
1678         g_mutex_unlock (EV_DOC_MUTEX);
1679
1680         n_pages = ev_page_cache_get_n_pages (page_cache);
1681
1682         view->find_result--;
1683
1684         if (view->find_result < 0) {
1685                 view->find_result = 0;
1686                 view->find_page--;
1687
1688                 if (view->find_page < 0) {
1689                         view->find_page = n_pages - 1;
1690                 }
1691
1692                 jump_to_find_page (view);
1693         } else {
1694                 jump_to_find_result (view);
1695                 gtk_widget_queue_draw (GTK_WIDGET (view));
1696         }
1697 }
1698 void
1699 ev_view_hide_cursor (EvView *view)
1700 {
1701        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
1702 }
1703
1704 void
1705 ev_view_show_cursor (EvView *view)
1706 {
1707        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1708 }