shell/ev-view.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *  Copyright (C) 2004 Red Hat, Inc
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include <math.h>
  22 #include <gtk/gtkalignment.h>
  23 #include <glib/gi18n.h>
  24 #include <gtk/gtkbindings.h>
  25 #include <gtk/gtkselection.h>
  26 #include <gtk/gtkclipboard.h>
  27 #include <gdk/gdkkeysyms.h>
  28 #include <libgnomevfs/gnome-vfs-utils.h>
  29
  30 #include "ev-marshal.h"
  31 #include "ev-view.h"
  32 #include "ev-document-find.h"
  33 #include "ev-document-misc.h"
  34 #include "ev-debug.h"
  35 #include "ev-job-queue.h"
  36 #include "ev-page-cache.h"
  37 #include "ev-pixbuf-cache.h"
  38
  39 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  40 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  41 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  42
  43 enum {
  44         PROP_0,
  45         PROP_STATUS,
  46         PROP_FIND_STATUS,
  47         PROP_CONTINUOUS,
  48         PROP_DUAL_PAGE,
  49         PROP_FULLSCREEN,
  50         PROP_PRESENTATION,
  51         PROP_SIZING_MODE,
  52 };
  53
  54 enum {
  55   TARGET_STRING,
  56   TARGET_TEXT,
  57   TARGET_COMPOUND_TEXT,
  58   TARGET_UTF8_STRING,
  59   TARGET_TEXT_BUFFER_CONTENTS
  60 };
  61
  62 enum {
  63         EV_SCROLL_PAGE_FORWARD,
  64         EV_SCROLL_PAGE_BACKWARD
  65 };
  66
  67 static const GtkTargetEntry targets[] = {
  68         { "STRING", 0, TARGET_STRING },
  69         { "TEXT",   0, TARGET_TEXT },
  70         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  71         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  72 };
  73
  74 typedef enum {
  75         EV_VIEW_CURSOR_NORMAL,
  76         EV_VIEW_CURSOR_LINK,
  77         EV_VIEW_CURSOR_WAIT,
  78         EV_VIEW_CURSOR_HIDDEN,
  79         EV_VIEW_CURSOR_DRAG
  80 } EvViewCursor;
  81
  82 #define ZOOM_IN_FACTOR  1.2
  83 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  84
  85 #define MIN_SCALE 0.05409
  86 #define MAX_SCALE 6.0
  87
  88 typedef struct {
  89         EvRectangle rect;
  90         int page;
  91 } EvViewSelection;
  92
  93 typedef struct {
  94         gboolean dragging;
  95         GdkPoint start;
  96         gdouble hadj;
  97         gdouble vadj;
  98 } DragInfo;
  99
 100 struct _EvView {
 101         GtkWidget parent_instance;
 102
 103         EvDocument *document;
 104
 105         GdkWindow *bin_window;
 106
 107         char *status;
 108         char *find_status;
 109
 110         int scroll_x;
 111         int scroll_y;
 112
 113         DragInfo drag_info;
 114         gboolean pressed_button;
 115         GdkPoint selection_start;
 116         GList *selections;
 117         EvViewCursor cursor;
 118
 119         GtkAdjustment *hadjustment;
 120         GtkAdjustment *vadjustment;
 121
 122         EvPageCache *page_cache;
 123         EvPixbufCache *pixbuf_cache;
 124
 125         gint start_page;
 126         gint end_page;
 127         gint current_page;
 128
 129         EvJobRender *current_job;
 130
 131         int find_page;
 132         int find_result;
 133         int spacing;
 134
 135         double scale;
 136         GtkBorder border;
 137
 138         gboolean continuous;
 139         gboolean dual_page;
 140         gboolean fullscreen;
 141         gboolean presentation;
 142         EvSizingMode sizing_mode;
 143 };
 144
 145 struct _EvViewClass {
 146         GtkWidgetClass parent_class;
 147
 148         void    (*set_scroll_adjustments) (EvView         *view,
 149                                            GtkAdjustment  *hadjustment,
 150                                            GtkAdjustment  *vadjustment);
 151         void    (*scroll_view)            (EvView         *view,
 152                                            GtkScrollType   scroll,
 153                                            gboolean        horizontal);
 154
 155 };
 156
 157
 158 static void ev_view_set_scroll_adjustments     (EvView        *view,
 159                                                 GtkAdjustment *hadjustment,
 160                                                 GtkAdjustment *vadjustment);
 161 static void get_bounding_box_size              (EvView        *view,
 162                                                 int           *max_width,
 163                                                 int           *max_height);
 164 static void view_update_range_and_current_page (EvView        *view);
 165
 166 static void page_changed_cb                    (EvPageCache *page_cache,
 167                                                 int          new_page,
 168                                                 EvView      *view);
 169
 170
 171 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 172
 173 /*** Helper functions ***/
 174
 175 static void
 176 view_update_adjustments (EvView *view)
 177 {
 178         int old_x = view->scroll_x;
 179         int old_y = view->scroll_y;
 180
 181         if (view->hadjustment)
 182                 view->scroll_x = view->hadjustment->value;
 183         else
 184                 view->scroll_x = 0;
 185
 186         if (view->vadjustment)
 187                 view->scroll_y = view->vadjustment->value;
 188         else
 189                 view->scroll_y = 0;
 190
 191         if (GTK_WIDGET_REALIZED (view) &&
 192             (view->scroll_x != old_x || view->scroll_y != old_y)) {
 193                 gdk_window_move (view->bin_window, - view->scroll_x, - view->scroll_y);
 194                 //              gdk_window_process_updates (view->bin_window, TRUE);
 195         }
 196
 197         if (view->document)
 198                 view_update_range_and_current_page (view);
 199 }
 200
 201 static void
 202 view_set_adjustment_values (EvView         *view,
 203                             GtkOrientation  orientation)
 204 {
 205         GtkWidget *widget = GTK_WIDGET (view);
 206         GtkAdjustment *adjustment;
 207         gboolean value_changed = FALSE;
 208         int requisition;
 209         int allocation;
 210
 211         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 212                 requisition = widget->requisition.width;
 213                 allocation = widget->allocation.width;
 214                 adjustment = view->hadjustment;
 215         } else {
 216                 requisition = widget->requisition.height;
 217                 allocation = widget->allocation.height;
 218                 adjustment = view->vadjustment;
 219         }
 220
 221         if (!adjustment)
 222                 return;
 223
 224         adjustment->page_size = allocation;
 225         adjustment->step_increment = allocation * 0.1;
 226         adjustment->page_increment = allocation * 0.9;
 227         adjustment->lower = 0;
 228         adjustment->upper = MAX (allocation, requisition);
 229
 230         if (adjustment->value > adjustment->upper - adjustment->page_size) {
 231                 adjustment->value = adjustment->upper - adjustment->page_size;
 232                 value_changed = TRUE;
 233         }
 234
 235         gtk_adjustment_changed (adjustment);
 236         if (value_changed)
 237                 gtk_adjustment_value_changed (adjustment);
 238 }
 239
 240 static void
 241 view_update_range_and_current_page (EvView *view)
 242 {
 243         /* Presentation trumps all other modes */
 244         if (view->presentation) {
 245                 view->start_page = view->current_page;
 246                 view->end_page = view->current_page;
 247         } else if (view->continuous) {
 248                 GdkRectangle current_area, unused, page_area;
 249                 gint current_page;
 250                 gboolean found = FALSE;
 251                 int i;
 252
 253                 get_bounding_box_size (view, &(page_area.width), &(page_area.height));
 254                 page_area.x = view->spacing;
 255                 page_area.y = view->spacing;
 256
 257                 if (view->hadjustment) {
 258                         current_area.x = view->hadjustment->value;
 259                         current_area.width = view->hadjustment->page_size;
 260                 } else {
 261                         current_area.x = page_area.x;
 262                         current_area.width = page_area.width;
 263                 }
 264
 265                 if (view->vadjustment) {
 266                         current_area.y = view->vadjustment->value;
 267                         current_area.height = view->vadjustment->page_size;
 268                 } else {
 269                         current_area.y = page_area.y;
 270                         current_area.height = page_area.height;
 271                 }
 272
 273                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 274                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 275                                 if (! found) {
 276                                         view->start_page = i;
 277                                         found = TRUE;
 278
 279                                 }
 280                                 view->end_page = i;
 281                         } else if (found) {
 282                                 break;
 283                         }
 284                         if (view->dual_page) {
 285                                 if (i % 2 == 0) {
 286                                         page_area.x += page_area.width + view->spacing;
 287                                 } else {
 288                                         page_area.x = view->spacing;
 289                                         page_area.y += page_area.height + view->spacing;
 290                                 }
 291                         } else {
 292                                 page_area.y += page_area.height + view->spacing;
 293                         }
 294                 }
 295
 296                 current_page = ev_page_cache_get_current_page (view->page_cache);
 297
 298                 if (current_page < view->start_page || current_page > view->end_page) {
 299                         g_signal_handlers_block_by_func (view->page_cache, page_changed_cb, view);
 300                         ev_page_cache_set_current_page (view->page_cache, view->start_page);
 301                         g_signal_handlers_unblock_by_func (view->page_cache, page_changed_cb, view);
 302                 }
 303         } else {
 304                 if (view->dual_page) {
 305                         if (view->current_page % 2 == 0) {
 306                                 view->start_page = view->current_page;
 307                                 if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 308                                         view->end_page = view->start_page + 1;
 309                         } else {
 310                                 view->start_page = view->current_page - 1;
 311                                 view->end_page = view->current_page;
 312                         }
 313                 } else {
 314                         view->start_page = view->current_page;
 315                         view->end_page = view->current_page;
 316                 }
 317         }
 318
 319         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 320                                         view->start_page,
 321                                         view->end_page,
 322                                         view->scale);
 323 }
 324
 325 static void
 326 clear_selection (EvView *view)
 327 {
 328         g_list_foreach (view->selections, (GFunc)g_free, NULL);
 329         view->selections = NULL;
 330 }
 331
 332 /*** Virtual function implementations ***/
 333
 334 static void
 335 ev_view_finalize (GObject *object)
 336 {
 337         EvView *view = EV_VIEW (object);
 338
 339         LOG ("Finalize");
 340
 341         g_free (view->status);
 342         g_free (view->find_status);
 343
 344         clear_selection (view);
 345
 346         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
 347 }
 348
 349 static void
 350 ev_view_destroy (GtkObject *object)
 351 {
 352         EvView *view = EV_VIEW (object);
 353
 354         if (view->document) {
 355                 g_object_unref (view->document);
 356                 view->document = NULL;
 357         }
 358         if (view->pixbuf_cache) {
 359                 g_object_unref (view->pixbuf_cache);
 360                 view->pixbuf_cache = NULL;
 361         }
 362         ev_view_set_scroll_adjustments (view, NULL, NULL);
 363
 364         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
 365 }
 366
 367 static void
 368 compute_border (EvView *view, int width, int height, GtkBorder *border)
 369 {
 370         if (view->presentation) {
 371                 border->left = 0;
 372                 border->right = 0;
 373                 border->top = 0;
 374                 border->bottom = 0;
 375         } else {
 376                 ev_document_misc_get_page_border_size (width, height, border);
 377         }
 378 }
 379
 380 static gboolean
 381 get_page_extents (EvView       *view,
 382                   gint          page,
 383                   GdkRectangle *page_area,
 384                   GtkBorder    *border)
 385 {
 386         GtkWidget *widget;
 387         int width, height;
 388
 389         widget = GTK_WIDGET (view);
 390
 391         /* Quick sanity check */
 392         if (view->presentation) {
 393                 if (view->current_page != page)
 394                         return FALSE;
 395         } else if (view->continuous) {
 396                 if (page < view->start_page ||
 397                     page > view->end_page)
 398                         return FALSE;
 399         } else if (view->dual_page) {
 400                 if (ABS (page - view->current_page) > 1)
 401                         return FALSE;
 402         } else {
 403                 if (view->current_page != page)
 404                         return FALSE;
 405         }
 406
 407         /* Get the size of the page */
 408         ev_page_cache_get_size (view->page_cache, page,
 409                                 view->scale,
 410                                 &width, &height);
 411         compute_border (view, width, height, border);
 412         page_area->width = width + border->left + border->right;
 413         page_area->height = height + border->top + border->bottom;
 414
 415         if (view->presentation) {
 416                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 417                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 418         } else if (view->continuous) {
 419                 gint max_width, max_height;
 420                 gint x, y;
 421
 422                 get_bounding_box_size (view, &max_width, &max_height);
 423                 /* Get the location of the bounding box */
 424                 if (view->dual_page) {
 425                         x = view->spacing + (page % 2) * (max_width + view->spacing);
 426                         y = view->spacing + (page / 2) * (max_height + view->spacing);
 427                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3))/2;
 428                 } else {
 429                         x = view->spacing;
 430                         y = view->spacing + page * (max_height + view->spacing);
 431                         x = x + MAX (0, widget->allocation.width - (max_width + view->spacing * 2))/2;
 432                 }
 433                 page_area->x = x;
 434                 page_area->y = y;
 435         } else {
 436                 gint x, y;
 437                 if (view->dual_page) {
 438                         gint width_2, height_2;
 439                         gint max_width = width;
 440                         gint max_height = height;
 441                         GtkBorder overall_border;
 442                         gint other_page;
 443
 444                         other_page = page ^ 1;
 445
 446                         /* First, we get the bounding box of the two pages */
 447                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
 448                                 ev_page_cache_get_size (view->page_cache,
 449                                                         page + 1,
 450                                                         view->scale,
 451                                                         &width_2, &height_2);
 452                                 if (width_2 > width)
 453                                         max_width = width_2;
 454                                 if (height_2 > height)
 455                                         max_height = height_2;
 456                         }
 457                         compute_border (view, max_width, max_height, &overall_border);
 458
 459                         /* Find the offsets */
 460                         x = view->spacing;
 461                         y = view->spacing;
 462
 463                         /* Adjust for being the left or right page */
 464                         if (page % 2 == 0)
 465                                 x = x + max_width - width;
 466                         else
 467                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 468
 469                         y = y + (max_height - height)/2;
 470
 471                         /* Adjust for extra allocation */
 472                         x = x + MAX (0, widget->allocation.width -
 473                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 474                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 475                 } else {
 476                         x = view->spacing;
 477                         y = view->spacing;
 478
 479                         /* Adjust for extra allocation */
 480                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2))/2;
 481                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 482                 }
 483
 484                 page_area->x = x;
 485                 page_area->y = y;
 486         }
 487
 488         return TRUE;
 489 }
 490
 491 static void
 492 view_rect_to_doc_rect (EvView *view,
 493                        GdkRectangle *view_rect,
 494                        GdkRectangle *page_area,
 495                        EvRectangle  *doc_rect)
 496 {
 497         doc_rect->x1 = floor ((view_rect->x - page_area->x) / view->scale);
 498         doc_rect->y1 = floor ((view_rect->y - page_area->y) / view->scale);
 499         doc_rect->x2 = doc_rect->x1 + ceil (view_rect->width / view->scale);
 500         doc_rect->y2 = doc_rect->y1 + ceil (view_rect->height / view->scale);
 501 }
 502
 503 static void
 504 compute_selections (EvView *view, GdkRectangle *view_rect)
 505 {
 506         int n_pages, i;
 507
 508         clear_selection (view);
 509
 510         n_pages = ev_page_cache_get_n_pages (view->page_cache);
 511         for (i = 0; i < n_pages; i++) {
 512                 GdkRectangle page_area;
 513                 GtkBorder border;
 514
 515                 if (get_page_extents (view, i, &page_area, &border)) {
 516                         GdkRectangle overlap;
 517
 518                         if (gdk_rectangle_intersect (&page_area, view_rect, &overlap)) {
 519                                 EvViewSelection *selection;
 520
 521                                 selection = g_new0 (EvViewSelection, 1);
 522                                 selection->page = i;
 523                                 view_rect_to_doc_rect (view, &overlap, &page_area,
 524                                                        &(selection->rect));
 525
 526                                 view->selections = g_list_append
 527                                                 (view->selections, selection);
 528                         }
 529                 }
 530         }
 531 }
 532
 533 static void
 534 doc_rect_to_view_rect (EvView       *view,
 535                        int           page,
 536                        EvRectangle  *doc_rect,
 537                        GdkRectangle *view_rect)
 538 {
 539         GdkRectangle page_area;
 540         GtkBorder border;
 541         int width, height;
 542
 543         get_page_extents (view, page, &page_area, &border);
 544
 545         width = doc_rect->x2 - doc_rect->x1;
 546         height = doc_rect->y2 - doc_rect->y1;
 547         view_rect->x = floor (doc_rect->x1 * view->scale) + page_area.x;
 548         view_rect->y = floor (doc_rect->y1 * view->scale) + page_area.y;
 549         view_rect->width = ceil (width * view->scale);
 550         view_rect->height = ceil (height * view->scale);
 551 }
 552
 553 static void
 554 get_bounding_box_size (EvView *view, int *max_width, int *max_height)
 555 {
 556         GtkBorder border;
 557         int width, height;
 558
 559         if (max_width) {
 560                 ev_page_cache_get_max_width_size (view->page_cache,
 561                                                   view->scale,
 562                                                   &width, &height);
 563                 compute_border (view, width, height, &border);
 564                 *max_width = width + border.left + border.right;
 565         }
 566
 567
 568         if (max_height) {
 569                 ev_page_cache_get_max_height_size (view->page_cache,
 570                                                    view->scale,
 571                                                    &width, &height);
 572                 compute_border (view, width, height, &border);
 573                 *max_height = height + border.top + border.bottom;
 574         }
 575 }
 576
 577
 578 static void
 579 ev_view_size_request_continuous_and_dual_page (EvView         *view,
 580                                                GtkRequisition *requisition)
 581 {
 582         int max_width, max_height;
 583         int n_rows;
 584
 585         get_bounding_box_size (view, &max_width, &max_height);
 586
 587         n_rows = (1 + ev_page_cache_get_n_pages (view->page_cache)) / 2;
 588
 589         requisition->width = (max_width * 2) + (view->spacing * 3);
 590         requisition->height = max_height * n_rows + (view->spacing * (n_rows + 1));
 591
 592         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
 593                 requisition->width = 1;
 594         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
 595                 requisition->width = 1;
 596                 /* FIXME: This could actually be set on one page docs or docs
 597                  * with a strange aspect ratio. */
 598                 /* requisition->height = 1;*/
 599         }
 600 }
 601
 602 static void
 603 ev_view_size_request_continuous (EvView         *view,
 604                                  GtkRequisition *requisition)
 605 {
 606         int max_width, max_height;
 607         int n_pages;
 608
 609         get_bounding_box_size (view, &max_width, &max_height);
 610
 611         n_pages = ev_page_cache_get_n_pages (view->page_cache);
 612
 613         requisition->width = max_width + (view->spacing * 2);
 614         requisition->height = max_height * n_pages + (view->spacing * (n_pages + 1));
 615
 616         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
 617                 requisition->width = 1;
 618         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
 619                 requisition->width = 1;
 620                 /* FIXME: This could actually be set on one page docs or docs
 621                  * with a strange aspect ratio. */
 622                 /* requisition->height = 1;*/
 623         }
 624 }
 625
 626 static void
 627 ev_view_size_request_dual_page (EvView         *view,
 628                                 GtkRequisition *requisition)
 629 {
 630         GtkBorder border;
 631         gint width, height;
 632
 633         /* Find the largest of the two. */
 634         ev_page_cache_get_size (view->page_cache,
 635                                 view->current_page,
 636                                 view->scale,
 637                                 &width, &height);
 638         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
 639                 gint width_2, height_2;
 640                 ev_page_cache_get_size (view->page_cache,
 641                                         view->current_page + 1,
 642                                         view->scale,
 643                                         &width_2, &height_2);
 644                 if (width_2 > width) {
 645                         width = width_2;
 646                         height = height_2;
 647                 }
 648         }
 649         compute_border (view, width, height, &border);
 650
 651         requisition->width = ((width + border.left + border.right) * 2) +
 652                 (view->spacing * 3);
 653         requisition->height = (height + border.top + border.bottom) +
 654                 (view->spacing * 2);
 655
 656         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
 657                 requisition->width = 1;
 658         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
 659                 requisition->width = 1;
 660                 requisition->height = 1;
 661         }
 662 }
 663
 664 static void
 665 ev_view_size_request_single_page (EvView         *view,
 666                                   GtkRequisition *requisition)
 667 {
 668         GtkBorder border;
 669         gint width, height;
 670
 671         ev_page_cache_get_size (view->page_cache,
 672                                 view->current_page,
 673                                 view->scale,
 674                                 &width, &height);
 675         compute_border (view, width, height, &border);
 676
 677         requisition->width = width + border.left + border.right + (2 * view->spacing);
 678         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
 679
 680         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
 681                 requisition->width = 1;
 682                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
 683         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
 684                 requisition->width = 1;
 685                 requisition->height = 1;
 686         }
 687 }
 688
 689 static void
 690 ev_view_size_request (GtkWidget      *widget,
 691                       GtkRequisition *requisition)
 692 {
 693         EvView *view = EV_VIEW (widget);
 694
 695         if (!GTK_WIDGET_REALIZED (widget))
 696                 return;
 697
 698         if (view->document == NULL) {
 699                 requisition->width = 1;
 700                 requisition->height = 1;
 701                 return;
 702         }
 703
 704         if (view->presentation) {
 705                 requisition->width = 1;
 706                 requisition->height = 1;
 707                 return;
 708         }
 709
 710         if (view->continuous && view->dual_page)
 711                 ev_view_size_request_continuous_and_dual_page (view, requisition);
 712         else if (view->continuous)
 713                 ev_view_size_request_continuous (view, requisition);
 714         else if (view->dual_page)
 715                 ev_view_size_request_dual_page (view, requisition);
 716         else
 717                 ev_view_size_request_single_page (view, requisition);
 718 }
 719
 720 static void
 721 ev_view_size_allocate (GtkWidget      *widget,
 722                        GtkAllocation  *allocation)
 723 {
 724         EvView *view = EV_VIEW (widget);
 725
 726         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
 727
 728         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
 729         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
 730
 731         if (GTK_WIDGET_REALIZED (widget)) {
 732                 gdk_window_resize (view->bin_window,
 733                                    MAX (widget->allocation.width, widget->requisition.width),
 734                                    MAX (widget->allocation.height, widget->requisition.height));
 735         }
 736
 737         if (view->document)
 738                 view_update_range_and_current_page (view);
 739 }
 740
 741 static void
 742 ev_view_realize (GtkWidget *widget)
 743 {
 744         EvView *view = EV_VIEW (widget);
 745         GdkWindowAttr attributes;
 746
 747         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 748
 749
 750         attributes.window_type = GDK_WINDOW_CHILD;
 751         attributes.wclass = GDK_INPUT_OUTPUT;
 752         attributes.visual = gtk_widget_get_visual (widget);
 753         attributes.colormap = gtk_widget_get_colormap (widget);
 754
 755         attributes.x = widget->allocation.x;
 756         attributes.y = widget->allocation.y;
 757         attributes.width = widget->allocation.width;
 758         attributes.height = widget->allocation.height;
 759         attributes.event_mask = 0;
 760
 761         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
 762                                          &attributes,
 763                                          GDK_WA_X | GDK_WA_Y |
 764                                          GDK_WA_COLORMAP |
 765                                          GDK_WA_VISUAL);
 766         gdk_window_set_user_data (widget->window, widget);
 767         widget->style = gtk_style_attach (widget->style, widget->window);
 768         gdk_window_set_background (widget->window, &widget->style->mid[widget->state]);
 769
 770         attributes.x = 0;
 771         attributes.y = 0;
 772         attributes.width = MAX (widget->allocation.width, widget->requisition.width);
 773         attributes.height = MAX (widget->allocation.height, widget->requisition.height);
 774         attributes.event_mask = GDK_EXPOSURE_MASK |
 775                                 GDK_BUTTON_PRESS_MASK |
 776                                 GDK_BUTTON_RELEASE_MASK |
 777                                 GDK_SCROLL_MASK |
 778                                 GDK_KEY_PRESS_MASK |
 779                                 GDK_POINTER_MOTION_MASK |
 780                                 GDK_LEAVE_NOTIFY_MASK;
 781
 782         view->bin_window = gdk_window_new (widget->window,
 783                                            &attributes,
 784                                            GDK_WA_X | GDK_WA_Y |
 785                                            GDK_WA_COLORMAP |
 786                                            GDK_WA_VISUAL);
 787         gdk_window_set_user_data (view->bin_window, widget);
 788         gdk_window_show (view->bin_window);
 789
 790         widget->style = gtk_style_attach (widget->style, view->bin_window);
 791         if (view->presentation)
 792                 gdk_window_set_background (view->bin_window, &widget->style->black);
 793         else
 794                 gdk_window_set_background (view->bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
 795
 796         if (view->document) {
 797                 /* We can't get page size without a target, so we have to
 798                  * queue a size request at realization. Could be fixed
 799                  * with EvDocument changes to allow setting a GdkScreen
 800                  * without setting a target.
 801                  */
 802                 gtk_widget_queue_resize (widget);
 803         }
 804 }
 805
 806 static void
 807 ev_view_unrealize (GtkWidget *widget)
 808 {
 809         EvView *view = EV_VIEW (widget);
 810
 811         gdk_window_set_user_data (view->bin_window, NULL);
 812         gdk_window_destroy (view->bin_window);
 813         view->bin_window = NULL;
 814
 815         GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
 816 }
 817
 818 static gboolean
 819 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
 820 {
 821         EvView *view = EV_VIEW (widget);
 822
 823         if ((event->state & GDK_CONTROL_MASK) != 0) {
 824
 825                  ev_view_set_sizing_mode (view, EV_SIZING_FREE);
 826
 827                  if ((event->direction == GDK_SCROLL_UP ||
 828                         event->direction == GDK_SCROLL_LEFT) &&
 829                         ev_view_can_zoom_in (view)) {
 830                                 ev_view_zoom_in (view);
 831                  } else if (ev_view_can_zoom_out (view)) {
 832                                 ev_view_zoom_out (view);
 833                  }
 834
 835                  return TRUE;
 836         }
 837
 838         if ((event->state & GDK_SHIFT_MASK) != 0) {
 839                 if (event->direction == GDK_SCROLL_UP)
 840                         event->direction = GDK_SCROLL_LEFT;
 841                 if (event->direction == GDK_SCROLL_DOWN)
 842                         event->direction = GDK_SCROLL_RIGHT;
 843         }
 844
 845         return FALSE;
 846 }
 847
 848 static guint32
 849 ev_gdk_color_to_rgb (const GdkColor *color)
 850 {
 851   guint32 result;
 852   result = (0xff0000 | (color->red & 0xff00));
 853   result <<= 8;
 854   result |= ((color->green & 0xff00) | (color->blue >> 8));
 855   return result;
 856 }
 857
 858 static void
 859 draw_rubberband (GtkWidget *widget, GdkWindow *window,
 860                  const GdkRectangle *rect, guchar alpha)
 861 {
 862         GdkGC *gc;
 863         GdkPixbuf *pixbuf;
 864         GdkColor *fill_color_gdk;
 865         guint fill_color;
 866
 867         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
 868         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
 869
 870         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
 871                                  rect->width, rect->height);
 872         gdk_pixbuf_fill (pixbuf, fill_color);
 873
 874         gdk_draw_pixbuf (window, NULL, pixbuf,
 875                          0, 0,
 876                          rect->x, rect->y,
 877                          rect->width, rect->height,
 878                          GDK_RGB_DITHER_NONE,
 879                          0, 0);
 880
 881         g_object_unref (pixbuf);
 882
 883         gc = gdk_gc_new (window);
 884         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
 885         gdk_draw_rectangle (window, gc, FALSE,
 886                             rect->x, rect->y,
 887                             rect->width - 1,
 888                             rect->height - 1);
 889         g_object_unref (gc);
 890
 891         gdk_color_free (fill_color_gdk);
 892 }
 893
 894
 895 static void
 896 highlight_find_results (EvView *view, int page)
 897 {
 898         EvDocumentFind *find;
 899         int i, results = 0;
 900
 901         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
 902
 903         find = EV_DOCUMENT_FIND (view->document);
 904
 905         results = ev_document_find_get_n_results (find, page);
 906
 907         for (i = 0; i < results; i++) {
 908                 EvRectangle rectangle;
 909                 GdkRectangle view_rectangle;
 910                 guchar alpha;
 911
 912                 if (i == view->find_result && page == view->find_page) {
 913                         alpha = 0x90;
 914                 } else {
 915                         alpha = 0x20;
 916                 }
 917
 918                 ev_document_find_get_result (find, page,
 919                                              i, &rectangle);
 920                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
 921                 draw_rubberband (GTK_WIDGET (view), view->bin_window,
 922                                  &view_rectangle, alpha);
 923         }
 924 }
 925
 926 static void
 927 draw_one_page (EvView       *view,
 928                gint          page,
 929                GdkRectangle *page_area,
 930                GtkBorder    *border,
 931                GdkRectangle *expose_area)
 932 {
 933         gint width, height;
 934         GdkPixbuf *scaled_image;
 935         GdkPixbuf *current_pixbuf;
 936         GdkRectangle overlap;
 937         GdkRectangle real_page_area;
 938
 939         g_assert (view->document);
 940
 941         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
 942                 return;
 943
 944         ev_page_cache_get_size (view->page_cache,
 945                                 page, view->scale,
 946                                 &width, &height);
 947
 948         ev_document_misc_paint_one_page (view->bin_window,
 949                                          GTK_WIDGET (view),
 950                                          page_area, border);
 951
 952         /* Render the document itself */
 953         real_page_area = *page_area;
 954
 955         real_page_area.x += border->left;
 956         real_page_area.y += border->top;
 957         real_page_area.width -= (border->left + border->right);
 958         real_page_area.height -= (border->top + border->bottom);
 959
 960         if (! gdk_rectangle_intersect (&real_page_area, expose_area, &overlap))
 961                 return;
 962
 963         current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
 964         if (current_pixbuf == NULL)
 965                 scaled_image = NULL;
 966         else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
 967                  height == gdk_pixbuf_get_height (current_pixbuf))
 968                 scaled_image = g_object_ref (current_pixbuf);
 969         else
 970                 scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
 971                                                         width, height,
 972                                                         GDK_INTERP_NEAREST);
 973         if (scaled_image) {
 974                 gdk_draw_pixbuf (view->bin_window,
 975                                  GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
 976                                  scaled_image,
 977                                  overlap.x - real_page_area.x,
 978                                  overlap.y - real_page_area.y,
 979                                  overlap.x, overlap.y,
 980                                  overlap.width, overlap.height,
 981                                  GDK_RGB_DITHER_NORMAL,
 982                                  0, 0);
 983                 g_object_unref (scaled_image);
 984         }
 985 }
 986
 987 static void
 988 ev_view_bin_expose (EvView         *view,
 989                     GdkEventExpose *event)
 990 {
 991         GdkRectangle rubberband;
 992         GList *l;
 993         int i;
 994
 995         if (view->document == NULL)
 996                 return;
 997
 998         for (i = view->start_page; i <= view->end_page; i++) {
 999                 GdkRectangle page_area;
1000                 GtkBorder border;
1001
1002                 if (! get_page_extents (view, i, &page_area, &border))
1003                         continue;
1004
1005                 draw_one_page (view, i, &page_area, &border, &(event->area));
1006
1007                 if (EV_IS_DOCUMENT_FIND (view->document)) {
1008                         highlight_find_results (view, i);
1009                 }
1010         }
1011
1012         for (l = view->selections; l != NULL; l = l->next) {
1013                 EvViewSelection *selection = (EvViewSelection *)l->data;
1014
1015                 doc_rect_to_view_rect (view, selection->page,
1016                                        &selection->rect, &rubberband);
1017                 if (rubberband.width > 0 && rubberband.height > 0) {
1018                         draw_rubberband (GTK_WIDGET (view), view->bin_window,
1019                                          &rubberband, 0x40);
1020                 }
1021         }
1022 }
1023
1024 static gboolean
1025 ev_view_expose_event (GtkWidget      *widget,
1026                       GdkEventExpose *event)
1027 {
1028         EvView *view = EV_VIEW (widget);
1029
1030         if (event->window == view->bin_window)
1031                 ev_view_bin_expose (view, event);
1032         else
1033                 return GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event (widget, event);
1034
1035         return FALSE;
1036 }
1037
1038 void
1039 ev_view_select_all (EvView *view)
1040 {
1041         int n_pages, i;
1042
1043         clear_selection (view);
1044
1045         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1046         for (i = 0; i < n_pages; i++) {
1047                 int width, height;
1048                 EvViewSelection *selection;
1049
1050                 ev_page_cache_get_size (view->page_cache,
1051                                         i, 1.0, &width, &height);
1052
1053                 selection = g_new0 (EvViewSelection, 1);
1054                 selection->page = i;
1055                 selection->rect.x1 = selection->rect.y1 = 0;
1056                 selection->rect.x2 = width;
1057                 selection->rect.y2 = height;
1058
1059                 view->selections = g_list_append (view->selections, selection);
1060         }
1061
1062         gtk_widget_queue_draw (GTK_WIDGET (view));
1063 }
1064
1065 static char *
1066 get_selected_text (EvView *ev_view)
1067 {
1068         GString *text;
1069         GList *l;
1070
1071         text = g_string_new (NULL);
1072
1073         ev_document_doc_mutex_lock ();
1074
1075         for (l = ev_view->selections; l != NULL; l = l->next) {
1076                 EvViewSelection *selection = (EvViewSelection *)l->data;
1077                 char *tmp;
1078
1079                 tmp = ev_document_get_text (ev_view->document,
1080                                             selection->page,
1081                                             &selection->rect);
1082                 g_string_append (text, tmp);
1083                 g_free (tmp);
1084         }
1085
1086         ev_document_doc_mutex_unlock ();
1087
1088         return g_string_free (text, FALSE);
1089 }
1090
1091 void
1092 ev_view_copy (EvView *ev_view)
1093 {
1094         GtkClipboard *clipboard;
1095         char *text;
1096
1097         if (!ev_document_can_get_text (ev_view->document)) {
1098                 return;
1099         }
1100
1101         text = get_selected_text (ev_view);
1102         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
1103                                               GDK_SELECTION_CLIPBOARD);
1104         gtk_clipboard_set_text (clipboard, text, -1);
1105         g_free (text);
1106 }
1107
1108 static void
1109 ev_view_primary_get_cb (GtkClipboard     *clipboard,
1110                         GtkSelectionData *selection_data,
1111                         guint             info,
1112                         gpointer          data)
1113 {
1114         EvView *ev_view = EV_VIEW (data);
1115         char *text;
1116
1117         if (!ev_document_can_get_text (ev_view->document)) {
1118                 return;
1119         }
1120
1121         text = get_selected_text (ev_view);
1122         gtk_selection_data_set_text (selection_data, text, -1);
1123         g_free (text);
1124 }
1125
1126 static void
1127 ev_view_primary_clear_cb (GtkClipboard *clipboard,
1128                           gpointer      data)
1129 {
1130         EvView *view = EV_VIEW (data);
1131
1132         clear_selection (view);
1133 }
1134
1135 static void
1136 ev_view_update_primary_selection (EvView *ev_view)
1137 {
1138         GtkClipboard *clipboard;
1139
1140         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
1141                                               GDK_SELECTION_PRIMARY);
1142
1143         if (ev_view->selections) {
1144                 if (!gtk_clipboard_set_with_owner (clipboard,
1145                                                    targets,
1146                                                    G_N_ELEMENTS (targets),
1147                                                    ev_view_primary_get_cb,
1148                                                    ev_view_primary_clear_cb,
1149                                                    G_OBJECT (ev_view)))
1150                         ev_view_primary_clear_cb (clipboard, ev_view);
1151         } else {
1152                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
1153                         gtk_clipboard_clear (clipboard);
1154         }
1155 }
1156
1157 static GdkCursor *
1158 ev_view_create_invisible_cursor(void)
1159 {
1160        GdkBitmap *empty;
1161        GdkColor black = { 0, 0, 0, 0 };
1162        static char bits[] = { 0x00 };
1163
1164        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
1165
1166        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
1167 }
1168
1169 static void
1170 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
1171 {
1172         GdkCursor *cursor = NULL;
1173         GdkDisplay *display;
1174         GtkWidget *widget;
1175
1176         if (view->cursor == new_cursor) {
1177                 return;
1178         }
1179
1180         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
1181         display = gtk_widget_get_display (widget);
1182         view->cursor = new_cursor;
1183
1184         switch (new_cursor) {
1185                 case EV_VIEW_CURSOR_NORMAL:
1186                         gdk_window_set_cursor (widget->window, NULL);
1187                         break;
1188                 case EV_VIEW_CURSOR_LINK:
1189                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
1190                         break;
1191                 case EV_VIEW_CURSOR_WAIT:
1192                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
1193                         break;
1194                 case EV_VIEW_CURSOR_HIDDEN:
1195                         cursor = ev_view_create_invisible_cursor ();
1196                         break;
1197                 case EV_VIEW_CURSOR_DRAG:
1198                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
1199                         break;
1200         }
1201
1202         if (cursor) {
1203                 gdk_window_set_cursor (widget->window, cursor);
1204                 gdk_cursor_unref (cursor);
1205                 gdk_flush();
1206         }
1207 }
1208
1209 static gboolean
1210 ev_view_button_press_event (GtkWidget      *widget,
1211                             GdkEventButton *event)
1212 {
1213         EvView *view = EV_VIEW (widget);
1214
1215         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1216                 gtk_widget_grab_focus (widget);
1217         }
1218
1219         view->pressed_button = event->button;
1220
1221         switch (event->button) {
1222                 case 1:
1223                         if (view->selections) {
1224                                 clear_selection (view);
1225                                 gtk_widget_queue_draw (widget);
1226                         }
1227
1228                         view->selection_start.x = event->x;
1229                         view->selection_start.y = event->y;
1230                         return TRUE;
1231                 case 2:
1232                         /* use root coordinates as reference point because
1233                          * scrolling changes window relative coordinates */
1234                         view->drag_info.start.x = event->x_root;
1235                         view->drag_info.start.y = event->y_root;
1236                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1237                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1238
1239                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1240
1241                         return TRUE;
1242         }
1243
1244         return FALSE;
1245 }
1246
1247 static char *
1248 status_message_from_link (EvView *view, EvLink *link)
1249 {
1250         EvLinkType type;
1251         char *msg = NULL;
1252         char *page_label;
1253
1254         type = ev_link_get_link_type (link);
1255
1256         switch (type) {
1257                 case EV_LINK_TYPE_TITLE:
1258                         if (ev_link_get_title (link))
1259                                 msg = g_strdup (ev_link_get_title (link));
1260                         break;
1261                 case EV_LINK_TYPE_PAGE:
1262                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
1263                         msg = g_strdup_printf (_("Go to page %s"), page_label);
1264                         g_free (page_label);
1265                         break;
1266                 case EV_LINK_TYPE_EXTERNAL_URI:
1267                         msg = g_strdup (ev_link_get_uri (link));
1268                         break;
1269                 default:
1270                         break;
1271         }
1272
1273         return msg;
1274 }
1275
1276 static void
1277 ev_view_set_status (EvView *view, const char *message)
1278 {
1279         g_return_if_fail (EV_IS_VIEW (view));
1280
1281         if (message != view->status) {
1282                 g_free (view->status);
1283                 view->status = g_strdup (message);
1284                 g_object_notify (G_OBJECT (view), "status");
1285         }
1286 }
1287
1288 static void
1289 ev_view_set_find_status (EvView *view, const char *message)
1290 {
1291         g_return_if_fail (EV_IS_VIEW (view));
1292
1293         g_free (view->find_status);
1294         view->find_status = g_strdup (message);
1295         g_object_notify (G_OBJECT (view), "find-status");
1296 }
1297
1298 static void
1299 find_page_at_location (EvView  *view,
1300                        gdouble  x,
1301                        gdouble  y,
1302                        gint    *page,
1303                        gint    *x_offset,
1304                        gint    *y_offset)
1305 {
1306         int i;
1307
1308         if (view->document == NULL)
1309                 return;
1310
1311         g_assert (page);
1312         g_assert (x_offset);
1313         g_assert (y_offset);
1314
1315         for (i = view->start_page; i <= view->end_page; i++) {
1316                 GdkRectangle page_area;
1317                 GtkBorder border;
1318
1319                 if (! get_page_extents (view, i, &page_area, &border))
1320                         continue;
1321
1322                 if ((x >= page_area.x + border.left) &&
1323                     (x < page_area.x + page_area.width - border.right) &&
1324                     (y >= page_area.y + border.top) &&
1325                     (y < page_area.y + page_area.height - border.bottom)) {
1326                         *page = i;
1327                         *x_offset = x - (page_area.x + border.left);
1328                         *y_offset = y - (page_area.y + border.top);
1329                         return;
1330                 }
1331         }
1332
1333         *page = -1;
1334 }
1335
1336 static EvLink *
1337 get_link_at_location (EvView  *view,
1338                       gdouble  x,
1339                       gdouble  y)
1340 {
1341         gint page = -1;
1342         gint x_offset = 0, y_offset = 0;
1343         GList *link_mapping;
1344
1345         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1346
1347         if (page == -1)
1348                 return NULL;
1349
1350         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1351
1352         if (link_mapping)
1353                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
1354         else
1355                 return NULL;
1356 }
1357
1358
1359 static gboolean
1360 ev_view_motion_notify_event (GtkWidget      *widget,
1361                              GdkEventMotion *event)
1362 {
1363         EvView *view = EV_VIEW (widget);
1364
1365         if (view->pressed_button == 1) {
1366                 GdkRectangle selection;
1367
1368                 selection.x = MIN (view->selection_start.x, event->x);
1369                 selection.y = MIN (view->selection_start.y, event->y);
1370                 selection.width = ABS (view->selection_start.x - event->x) + 1;
1371                 selection.height = ABS (view->selection_start.y - event->y) + 1;
1372
1373                 compute_selections (view, &selection);
1374
1375                 gtk_widget_queue_draw (widget);
1376
1377                 return TRUE;
1378         } else if (view->pressed_button == 2) {
1379                 if (!view->drag_info.dragging) {
1380                         gboolean start;
1381
1382                         start = gtk_drag_check_threshold (widget,
1383                                                           view->drag_info.start.x,
1384                                                           view->drag_info.start.y,
1385                                                           event->x_root,
1386                                                           event->y_root);
1387                         view->drag_info.dragging = start;
1388                 }
1389
1390                 if (view->drag_info.dragging) {
1391                         int dx, dy;
1392                         gdouble dhadj_value, dvadj_value;
1393
1394                         dx = event->x_root - view->drag_info.start.x;
1395                         dy = event->y_root - view->drag_info.start.y;
1396
1397                         dhadj_value = view->hadjustment->page_size *
1398                                       (gdouble)dx / widget->allocation.width;
1399                         dvadj_value = view->vadjustment->page_size *
1400                                       (gdouble)dy / widget->allocation.height;
1401
1402                         /* clamp scrolling to visible area */
1403                         gtk_adjustment_set_value (view->hadjustment,
1404                                                   MIN(view->drag_info.hadj - dhadj_value,
1405                                                       view->hadjustment->upper -
1406                                                       view->hadjustment->page_size));
1407                         gtk_adjustment_set_value (view->vadjustment,
1408                                                   MIN(view->drag_info.vadj - dvadj_value,
1409                                                       view->vadjustment->upper -
1410                                                       view->vadjustment->page_size));
1411
1412                         return TRUE;
1413                 }
1414         } else if (view->pressed_button <= 0 && view->document) {
1415                 EvLink *link;
1416
1417                 link = get_link_at_location (view, event->x, event->y);
1418                 if (link) {
1419                         char *msg;
1420
1421                         msg = status_message_from_link (view, link);
1422                         ev_view_set_status (view, msg);
1423                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1424                         g_free (msg);
1425                 } else {
1426                         ev_view_set_status (view, NULL);
1427                         if (view->cursor == EV_VIEW_CURSOR_LINK) {
1428                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1429                         }
1430                 }
1431                 return TRUE;
1432         }
1433
1434         return FALSE;
1435 }
1436
1437 /* FIXME: standardize this sometime */
1438 static void
1439 go_to_link (EvView *view, EvLink *link)
1440 {
1441         EvLinkType type;
1442         const char *uri;
1443         int page;
1444
1445         type = ev_link_get_link_type (link);
1446
1447         switch (type) {
1448                 case EV_LINK_TYPE_TITLE:
1449                         break;
1450                 case EV_LINK_TYPE_PAGE:
1451                         page = ev_link_get_page (link);
1452                         ev_page_cache_set_current_page (view->page_cache, page);
1453                         break;
1454                 case EV_LINK_TYPE_EXTERNAL_URI:
1455                         uri = ev_link_get_uri (link);
1456                         gnome_vfs_url_show (uri);
1457                         break;
1458         }
1459 }
1460
1461
1462 static gboolean
1463 ev_view_button_release_event (GtkWidget      *widget,
1464                               GdkEventButton *event)
1465 {
1466         EvView *view = EV_VIEW (widget);
1467
1468         if (view->pressed_button == 2) {
1469                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1470         }
1471
1472         view->pressed_button = -1;
1473         view->drag_info.dragging = FALSE;
1474
1475         if (view->selections) {
1476                 ev_view_update_primary_selection (view);
1477         } else if (view->document) {
1478                 EvLink *link;
1479
1480                 link = get_link_at_location (view, event->x, event->y);
1481                 if (link) {
1482                         go_to_link (view, link);
1483                 }
1484         }
1485
1486         return FALSE;
1487 }
1488
1489 static void
1490 on_adjustment_value_changed (GtkAdjustment  *adjustment,
1491                              EvView *view)
1492 {
1493         view_update_adjustments (view);
1494 }
1495
1496 static void
1497 set_scroll_adjustment (EvView *view,
1498                        GtkOrientation  orientation,
1499                        GtkAdjustment  *adjustment)
1500 {
1501         GtkAdjustment **to_set;
1502
1503         if (orientation == GTK_ORIENTATION_HORIZONTAL)
1504                 to_set = &view->hadjustment;
1505         else
1506                 to_set = &view->vadjustment;
1507
1508         if (*to_set != adjustment) {
1509                 if (*to_set) {
1510                         g_signal_handlers_disconnect_by_func (*to_set,
1511                                                               (gpointer) on_adjustment_value_changed,
1512                                                               view);
1513                         g_object_unref (*to_set);
1514                 }
1515
1516                 *to_set = adjustment;
1517                 view_set_adjustment_values (view, orientation);
1518
1519                 if (*to_set) {
1520                         g_object_ref (*to_set);
1521                         g_signal_connect (*to_set, "value_changed",
1522                                           G_CALLBACK (on_adjustment_value_changed), view);
1523                 }
1524         }
1525 }
1526
1527 static void
1528 ev_view_set_scroll_adjustments (EvView *view,
1529                                 GtkAdjustment  *hadjustment,
1530                                 GtkAdjustment  *vadjustment)
1531 {
1532         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
1533         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
1534
1535         view_update_adjustments (view);
1536 }
1537
1538 static void
1539 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
1540                            guint           keyval,
1541                            GtkScrollType   scroll,
1542                            gboolean        horizontal)
1543 {
1544   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
1545
1546   gtk_binding_entry_add_signal (binding_set, keyval, 0,
1547                                 "scroll_view", 2,
1548                                 GTK_TYPE_SCROLL_TYPE, scroll,
1549                                 G_TYPE_BOOLEAN, horizontal);
1550   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
1551                                 "scroll_view", 2,
1552                                 GTK_TYPE_SCROLL_TYPE, scroll,
1553                                 G_TYPE_BOOLEAN, horizontal);
1554 }
1555
1556 static void
1557 add_scroll_binding_shifted (GtkBindingSet  *binding_set,
1558                             guint           keyval,
1559                             GtkScrollType   scroll_normal,
1560                             GtkScrollType   scroll_shifted,
1561                             gboolean        horizontal)
1562 {
1563   gtk_binding_entry_add_signal (binding_set, keyval, 0,
1564                                 "scroll_view", 2,
1565                                 GTK_TYPE_SCROLL_TYPE, scroll_normal,
1566                                 G_TYPE_BOOLEAN, horizontal);
1567   gtk_binding_entry_add_signal (binding_set, keyval, GDK_SHIFT_MASK,
1568                                 "scroll_view", 2,
1569                                 GTK_TYPE_SCROLL_TYPE, scroll_shifted,
1570                                 G_TYPE_BOOLEAN, horizontal);
1571 }
1572
1573 static void
1574 ev_view_jump (EvView        *view,
1575               GtkScrollType  scroll)
1576 {
1577         GtkAdjustment *adjustment;
1578         double value, increment;
1579         gboolean first_page = FALSE;
1580         gboolean last_page = FALSE;
1581
1582         /* Assign values for increment and vertical adjustment */
1583         adjustment = view->vadjustment;
1584         increment = adjustment->page_size * 0.75;
1585         value = adjustment->value;
1586
1587         /* Assign boolean for first and last page */
1588         if (view->current_page == 0)
1589                 first_page = TRUE;
1590         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
1591                 last_page = TRUE;
1592
1593         switch (scroll) {
1594                 case EV_SCROLL_PAGE_BACKWARD:
1595                         /* Do not jump backwards if at the first page */
1596                         if (value == (adjustment->lower) && first_page) {
1597                                 /* Do nothing */
1598                                 /* At the top of a page, assign the upper bound limit of previous page */
1599                         } else if (value == (adjustment->lower)) {
1600                                 value = adjustment->upper - adjustment->page_size;
1601                                 ev_page_cache_set_current_page (view->page_cache, view->current_page - 1);
1602                                 /* Jump to the top */
1603                         } else {
1604                                 value = MAX (value - increment, adjustment->lower);
1605                         }
1606                         break;
1607                 case EV_SCROLL_PAGE_FORWARD:
1608                         /* Do not jump forward if at the last page */
1609                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
1610                                 /* Do nothing */
1611                         /* At the bottom of a page, assign the lower bound limit of next page */
1612                         } else if (value == (adjustment->upper - adjustment->page_size)) {
1613                                 value = 0;
1614                                 ev_page_cache_set_current_page (view->page_cache, view->current_page + 1);
1615                         /* Jump to the bottom */
1616                         } else {
1617                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
1618                         }
1619                         break;
1620                 default:
1621                         break;
1622         }
1623
1624         gtk_adjustment_set_value (adjustment, value);
1625 }
1626
1627 static void
1628 ev_view_scroll_view (EvView *view,
1629                      GtkScrollType scroll,
1630                      gboolean horizontal)
1631 {
1632         if (scroll == GTK_SCROLL_PAGE_BACKWARD) {
1633                 ev_page_cache_prev_page (view->page_cache);
1634         } else if (scroll == GTK_SCROLL_PAGE_FORWARD) {
1635                 ev_page_cache_next_page (view->page_cache);
1636         } else if (scroll == EV_SCROLL_PAGE_BACKWARD || scroll == EV_SCROLL_PAGE_FORWARD) {
1637                 ev_view_jump (view, scroll);
1638         } else {
1639                 GtkAdjustment *adjustment;
1640                 double value;
1641
1642                 if (horizontal) {
1643                         adjustment = view->hadjustment;
1644                 } else {
1645                         adjustment = view->vadjustment;
1646                 }
1647
1648                 value = adjustment->value;
1649
1650                 switch (scroll) {
1651                         case GTK_SCROLL_STEP_BACKWARD:
1652                                 value -= adjustment->step_increment;
1653                                 break;
1654                         case GTK_SCROLL_STEP_FORWARD:
1655                                 value += adjustment->step_increment;
1656                                 break;
1657                         default:
1658                                 break;
1659                 }
1660
1661                 value = CLAMP (value, adjustment->lower,
1662                                adjustment->upper - adjustment->page_size);
1663
1664                 gtk_adjustment_set_value (adjustment, value);
1665         }
1666 }
1667
1668 static void
1669 ev_view_set_property (GObject      *object,
1670                       guint         prop_id,
1671                       const GValue *value,
1672                       GParamSpec   *pspec)
1673 {
1674         EvView *view = EV_VIEW (object);
1675
1676         switch (prop_id)
1677         {
1678         case PROP_CONTINUOUS:
1679                 ev_view_set_continuous (view, g_value_get_boolean (value));
1680                 break;
1681         case PROP_DUAL_PAGE:
1682                 ev_view_set_dual_page (view, g_value_get_boolean (value));
1683                 break;
1684         case PROP_FULLSCREEN:
1685                 ev_view_set_fullscreen (view, g_value_get_boolean (value));
1686                 break;
1687         case PROP_PRESENTATION:
1688                 ev_view_set_presentation (view, g_value_get_boolean (value));
1689                 break;
1690         case PROP_SIZING_MODE:
1691                 ev_view_set_sizing_mode (view, g_value_get_enum (value));
1692                 break;
1693         default:
1694                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1695         }
1696 }
1697
1698 static void
1699 ev_view_get_property (GObject *object,
1700                       guint prop_id,
1701                       GValue *value,
1702                       GParamSpec *pspec)
1703 {
1704         EvView *view = EV_VIEW (object);
1705
1706         switch (prop_id)
1707         {
1708         case PROP_STATUS:
1709                 g_value_set_string (value, view->status);
1710                 break;
1711         case PROP_FIND_STATUS:
1712                 g_value_set_string (value, view->status);
1713                 break;
1714         case PROP_CONTINUOUS:
1715                 g_value_set_boolean (value, view->continuous);
1716                 break;
1717         case PROP_DUAL_PAGE:
1718                 g_value_set_boolean (value, view->dual_page);
1719                 break;
1720         case PROP_FULLSCREEN:
1721                 g_value_set_boolean (value, view->fullscreen);
1722                 break;
1723         case PROP_PRESENTATION:
1724                 g_value_set_boolean (value, view->presentation);
1725                 break;
1726         case PROP_SIZING_MODE:
1727                 g_value_set_enum (value, view->sizing_mode);
1728                 break;
1729         default:
1730                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1731         }
1732 }
1733
1734 static void
1735 ev_view_class_init (EvViewClass *class)
1736 {
1737         GObjectClass *object_class = G_OBJECT_CLASS (class);
1738         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
1739         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
1740         GtkBindingSet *binding_set;
1741
1742         object_class->finalize = ev_view_finalize;
1743         object_class->set_property = ev_view_set_property;
1744         object_class->get_property = ev_view_get_property;
1745
1746         widget_class->expose_event = ev_view_expose_event;
1747         widget_class->button_press_event = ev_view_button_press_event;
1748         widget_class->motion_notify_event = ev_view_motion_notify_event;
1749         widget_class->button_release_event = ev_view_button_release_event;
1750         widget_class->size_request = ev_view_size_request;
1751         widget_class->size_allocate = ev_view_size_allocate;
1752         widget_class->realize = ev_view_realize;
1753         widget_class->unrealize = ev_view_unrealize;
1754         widget_class->scroll_event = ev_view_scroll_event;
1755         gtk_object_class->destroy = ev_view_destroy;
1756
1757         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
1758         class->scroll_view = ev_view_scroll_view;
1759
1760         widget_class->set_scroll_adjustments_signal =  g_signal_new ("set-scroll-adjustments",
1761                                                                      G_OBJECT_CLASS_TYPE (object_class),
1762                                                                      G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1763                                                                      G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
1764                                                                      NULL, NULL,
1765                                                                      ev_marshal_VOID__OBJECT_OBJECT,
1766                                                                      G_TYPE_NONE, 2,
1767                                                                      GTK_TYPE_ADJUSTMENT,
1768                                                                      GTK_TYPE_ADJUSTMENT);
1769
1770         g_signal_new ("scroll_view",
1771                       G_TYPE_FROM_CLASS (object_class),
1772                       G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1773                       G_STRUCT_OFFSET (EvViewClass, scroll_view),
1774                       NULL, NULL,
1775                       ev_marshal_VOID__ENUM_BOOLEAN,
1776                       G_TYPE_NONE, 2,
1777                       GTK_TYPE_SCROLL_TYPE,
1778                       G_TYPE_BOOLEAN);
1779
1780         g_object_class_install_property (object_class,
1781                                          PROP_STATUS,
1782                                          g_param_spec_string ("status",
1783                                                               "Status Message",
1784                                                               "The status message",
1785                                                               NULL,
1786                                                               G_PARAM_READABLE));
1787
1788         g_object_class_install_property (object_class,
1789                                          PROP_FIND_STATUS,
1790                                          g_param_spec_string ("find-status",
1791                                                               "Find Status Message",
1792                                                               "The find status message",
1793                                                               NULL,
1794                                                               G_PARAM_READABLE));
1795
1796         g_object_class_install_property (object_class,
1797                                          PROP_CONTINUOUS,
1798                                          g_param_spec_boolean ("continuous",
1799                                                                "Continuous",
1800                                                                "Continuous scrolling mode",
1801                                                                TRUE,
1802                                                                G_PARAM_READWRITE));
1803
1804         g_object_class_install_property (object_class,
1805                                          PROP_DUAL_PAGE,
1806                                          g_param_spec_boolean ("dual-page",
1807                                                                "Dual Page",
1808                                                                "Two pages visible at once",
1809                                                                FALSE,
1810                                                                G_PARAM_READWRITE));
1811         g_object_class_install_property (object_class,
1812                                          PROP_FULLSCREEN,
1813                                          g_param_spec_boolean ("fullscreen",
1814                                                                "Full Screen",
1815                                                                "Draw page in a fullscreen fashion",
1816                                                                FALSE,
1817                                                                G_PARAM_READWRITE));
1818         g_object_class_install_property (object_class,
1819                                          PROP_PRESENTATION,
1820                                          g_param_spec_boolean ("presentation",
1821                                                                "Presentation",
1822                                                                "Draw page in presentation mode",
1823                                                                TRUE,
1824                                                                G_PARAM_READWRITE));
1825
1826         g_object_class_install_property (object_class,
1827                                          PROP_SIZING_MODE,
1828                                          g_param_spec_enum ("sizing-mode",
1829                                                             "Sizing Mode",
1830                                                             "Sizing Mode",
1831                                                             EV_TYPE_SIZING_MODE,
1832                                                             EV_SIZING_FIT_WIDTH,
1833                                                             G_PARAM_READWRITE));
1834
1835         binding_set = gtk_binding_set_by_class (class);
1836
1837         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
1838         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
1839         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
1840         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
1841
1842         add_scroll_binding_keypad (binding_set, GDK_Page_Up,   GTK_SCROLL_PAGE_BACKWARD, FALSE);
1843         add_scroll_binding_keypad (binding_set, GDK_Page_Down, GTK_SCROLL_PAGE_FORWARD,  FALSE);
1844
1845         add_scroll_binding_shifted (binding_set, GDK_space, EV_SCROLL_PAGE_FORWARD, EV_SCROLL_PAGE_BACKWARD, FALSE);
1846         add_scroll_binding_shifted (binding_set, GDK_BackSpace, EV_SCROLL_PAGE_BACKWARD, EV_SCROLL_PAGE_FORWARD, FALSE);
1847 }
1848
1849 static void
1850 ev_view_init (EvView *view)
1851 {
1852         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
1853
1854         view->spacing = 10;
1855         view->scale = 1.0;
1856         view->current_page = 0;
1857         view->pressed_button = -1;
1858         view->cursor = EV_VIEW_CURSOR_NORMAL;
1859         view->drag_info.dragging = FALSE;
1860
1861         view->continuous = TRUE;
1862         view->dual_page = FALSE;
1863         view->presentation = FALSE;
1864         view->fullscreen = FALSE;
1865         view->sizing_mode = EV_SIZING_FIT_WIDTH;
1866 }
1867
1868 static void
1869 update_find_status_message (EvView *view)
1870 {
1871         char *message;
1872
1873         if (view->current_page == view->find_page) {
1874                 int results;
1875
1876                 results = ev_document_find_get_n_results
1877                                 (EV_DOCUMENT_FIND (view->document),
1878                                  view->current_page);
1879                 /* TRANS: Sometimes this could be better translated as
1880                    "%d hit(s) on this page".  Therefore this string
1881                    contains plural cases. */
1882                 message = g_strdup_printf (ngettext ("%d found on this page",
1883                                                      "%d found on this page",
1884                                                      results),
1885                                            results);
1886         } else {
1887                 double percent;
1888
1889                 ev_document_doc_mutex_lock ();
1890                 percent = ev_document_find_get_progress
1891                                 (EV_DOCUMENT_FIND (view->document));
1892                 ev_document_doc_mutex_unlock ();
1893                 if (percent >= (1.0 - 1e-10)) {
1894                         message = g_strdup (_("Not found"));
1895                 } else {
1896                         message = g_strdup_printf (_("%3d%% remaining to search"),
1897                                                    (int) ((1.0 - percent) * 100));
1898                 }
1899
1900         }
1901 //      ev_document_doc_mutex_unlock ();
1902
1903         ev_view_set_find_status (view, message);
1904 //      g_free (message);
1905 }
1906
1907 #define MARGIN 5
1908
1909 static void
1910 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
1911 {
1912         GtkWidget *widget = GTK_WIDGET (view);
1913         GtkAdjustment *adjustment;
1914         int value;
1915
1916         adjustment = view->vadjustment;
1917
1918         if (rect->y < adjustment->value) {
1919                 value = MAX (adjustment->lower, rect->y - MARGIN);
1920                 gtk_adjustment_set_value (view->vadjustment, value);
1921         } else if (rect->y + rect->height >
1922                    adjustment->value + widget->allocation.height) {
1923                 value = MIN (adjustment->upper, rect->y + rect->height -
1924                              widget->allocation.height + MARGIN);
1925                 gtk_adjustment_set_value (view->vadjustment, value);
1926         }
1927
1928         adjustment = view->hadjustment;
1929
1930         if (rect->x < adjustment->value) {
1931                 value = MAX (adjustment->lower, rect->x - MARGIN);
1932                 gtk_adjustment_set_value (view->hadjustment, value);
1933         } else if (rect->x + rect->height >
1934                    adjustment->value + widget->allocation.width) {
1935                 value = MIN (adjustment->upper, rect->x + rect->width -
1936                              widget->allocation.width + MARGIN);
1937                 gtk_adjustment_set_value (view->hadjustment, value);
1938         }
1939 }
1940
1941 static void
1942 jump_to_find_result (EvView *view)
1943 {
1944         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
1945         EvRectangle rect;
1946         GdkRectangle view_rect;
1947         int n_results;
1948         int page = view->find_page;
1949
1950         ev_document_doc_mutex_lock ();
1951         n_results = ev_document_find_get_n_results (find, page);
1952         ev_document_doc_mutex_unlock ();
1953
1954         if (n_results > view->find_result) {
1955                 ev_document_doc_mutex_lock ();
1956                 ev_document_find_get_result
1957                         (find, page, view->find_result, &rect);
1958                 ev_document_doc_mutex_unlock ();
1959
1960                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
1961                 ensure_rectangle_is_visible (view, &view_rect);
1962         }
1963 }
1964
1965 static void
1966 jump_to_find_page (EvView *view)
1967 {
1968         int n_pages, i;
1969
1970         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1971
1972         for (i = 0; i < n_pages; i++) {
1973                 int has_results;
1974                 int page;
1975
1976                 page = i + view->find_page;
1977                 if (page >= n_pages) {
1978                         page = page - n_pages;
1979                 }
1980
1981                 has_results = ev_document_find_page_has_results
1982                                 (EV_DOCUMENT_FIND (view->document), page);
1983                 if (has_results == -1) {
1984                         view->find_page = page;
1985                         break;
1986                 } else if (has_results == 1) {
1987                         ev_page_cache_set_current_page (view->page_cache, page);
1988                         jump_to_find_result (view);
1989                         break;
1990                 }
1991         }
1992 }
1993
1994 static void
1995 find_changed_cb (EvDocument *document, int page, EvView *view)
1996 {
1997         jump_to_find_page (view);
1998         jump_to_find_result (view);
1999         update_find_status_message (view);
2000
2001         if (view->current_page == page)
2002                 gtk_widget_queue_draw (GTK_WIDGET (view));
2003 }
2004 /*** Public API ***/
2005
2006 GtkWidget*
2007 ev_view_new (void)
2008 {
2009         GtkWidget *view;
2010
2011         view = g_object_new (EV_TYPE_VIEW, NULL);
2012
2013         return view;
2014 }
2015
2016 static void
2017 job_finished_cb (EvPixbufCache *pixbuf_cache,
2018                  EvView        *view)
2019 {
2020         gtk_widget_queue_draw (GTK_WIDGET (view));
2021 }
2022
2023
2024 static void
2025 page_changed_cb (EvPageCache *page_cache,
2026                  int          new_page,
2027                  EvView      *view)
2028 {
2029         int old_page = view->current_page;
2030         int old_width, old_height;
2031         int new_width, new_height;
2032         int max_height, n_rows;
2033
2034         if (old_page == new_page)
2035                 return;
2036
2037         ev_page_cache_get_size (page_cache,
2038                                 old_page,
2039                                 view->scale,
2040                                 &old_width, &old_height);
2041
2042         view->current_page = new_page;
2043
2044         ev_page_cache_get_size (page_cache,
2045                                 new_page,
2046                                 view->scale,
2047                                 &new_width, &new_height);
2048
2049         compute_border (view, new_width, new_height, &(view->border));
2050
2051         if (new_width != old_width || new_height != old_height)
2052                 gtk_widget_queue_resize (GTK_WIDGET (view));
2053         else
2054                 gtk_widget_queue_draw (GTK_WIDGET (view));
2055
2056         if (view->continuous) {
2057
2058                 n_rows = view->dual_page ? new_page / 2 : new_page;
2059
2060                 get_bounding_box_size (view, NULL, &max_height);
2061
2062                 gtk_adjustment_clamp_page(view->vadjustment,
2063                                           (max_height + view->spacing) * n_rows,
2064                                           (max_height + view->spacing) * n_rows +
2065                                            view->vadjustment->page_size);
2066         } else {
2067                 gtk_adjustment_set_value (view->vadjustment,
2068                                           view->vadjustment->lower);
2069         }
2070
2071         if (EV_IS_DOCUMENT_FIND (view->document)) {
2072                 view->find_page = new_page;
2073                 view->find_result = 0;
2074                 update_find_status_message (view);
2075         }
2076
2077         view_update_range_and_current_page (view);
2078 }
2079
2080 void
2081 ev_view_set_document (EvView     *view,
2082                       EvDocument *document)
2083 {
2084         g_return_if_fail (EV_IS_VIEW (view));
2085
2086         if (document != view->document) {
2087                 if (view->document) {
2088                         g_signal_handlers_disconnect_by_func (view->document,
2089                                                               find_changed_cb,
2090                                                               view);
2091                         g_object_unref (view->document);
2092                         view->page_cache = NULL;
2093
2094                 }
2095
2096                 view->document = document;
2097                 view->find_page = 0;
2098                 view->find_result = 0;
2099
2100                 if (view->document) {
2101                         g_object_ref (view->document);
2102                         if (EV_IS_DOCUMENT_FIND (view->document)) {
2103                                 g_signal_connect (view->document,
2104                                                   "find_changed",
2105                                                   G_CALLBACK (find_changed_cb),
2106                                                   view);
2107                         }
2108                         view->page_cache = ev_document_get_page_cache (view->document);
2109                         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
2110                         view->pixbuf_cache = ev_pixbuf_cache_new (view->document);
2111                         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
2112                 }
2113
2114                 gtk_widget_queue_resize (GTK_WIDGET (view));
2115         }
2116 }
2117
2118 #define EPSILON 0.0000001
2119 void
2120 ev_view_set_zoom (EvView   *view,
2121                   double    factor,
2122                   gboolean  relative)
2123 {
2124         double scale;
2125
2126         if (relative)
2127                 scale = view->scale * factor;
2128         else
2129                 scale = factor;
2130
2131         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
2132
2133         if (ABS (view->scale - scale) < EPSILON)
2134                 return;
2135         view->scale = scale;
2136         gtk_widget_queue_resize (GTK_WIDGET (view));
2137 }
2138
2139 double
2140 ev_view_get_zoom (EvView *view)
2141 {
2142         return view->scale;
2143 }
2144
2145 void
2146 ev_view_set_continuous (EvView   *view,
2147                         gboolean  continuous)
2148 {
2149         g_return_if_fail (EV_IS_VIEW (view));
2150
2151         continuous = continuous != FALSE;
2152
2153         if (view->continuous != continuous) {
2154                 view->continuous = continuous;
2155                 gtk_widget_queue_resize (GTK_WIDGET (view));
2156         }
2157
2158         g_object_notify (G_OBJECT (view), "continuous");
2159 }
2160
2161 void
2162 ev_view_set_dual_page (EvView   *view,
2163                        gboolean  dual_page)
2164 {
2165         g_return_if_fail (EV_IS_VIEW (view));
2166
2167         dual_page = dual_page != FALSE;
2168
2169         if (view->dual_page == dual_page)
2170                 return;
2171
2172         view->dual_page = dual_page;
2173         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2174          * preload_cache_size to be 2 if dual_page is set.
2175          */
2176         gtk_widget_queue_resize (GTK_WIDGET (view));
2177
2178         g_object_notify (G_OBJECT (view), "dual-page");
2179 }
2180
2181 void
2182 ev_view_set_fullscreen (EvView   *view,
2183                          gboolean  fullscreen)
2184 {
2185         g_return_if_fail (EV_IS_VIEW (view));
2186
2187         fullscreen = fullscreen != FALSE;
2188
2189         if (view->fullscreen != fullscreen) {
2190                 view->fullscreen = fullscreen;
2191                 gtk_widget_queue_resize (GTK_WIDGET (view));
2192         }
2193
2194         g_object_notify (G_OBJECT (view), "fullscreen");
2195 }
2196
2197 gboolean
2198 ev_view_get_fullscreen (EvView *view)
2199 {
2200         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2201
2202         return view->fullscreen;
2203 }
2204
2205 void
2206 ev_view_set_presentation (EvView   *view,
2207                           gboolean  presentation)
2208 {
2209         g_return_if_fail (EV_IS_VIEW (view));
2210
2211         presentation = presentation != FALSE;
2212
2213         if (view->presentation == presentation)
2214                 return;
2215
2216         view->presentation = presentation;
2217         gtk_widget_queue_resize (GTK_WIDGET (view));
2218         if (GTK_WIDGET_REALIZED (view)) {
2219                 if (view->presentation)
2220                         gdk_window_set_background (view->bin_window,
2221                                                    &GTK_WIDGET (view)->style->black);
2222                 else
2223                         gdk_window_set_background (view->bin_window,
2224                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
2225         }
2226
2227
2228         g_object_notify (G_OBJECT (view), "presentation");
2229 }
2230
2231 gboolean
2232 ev_view_get_presentation (EvView *view)
2233 {
2234         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2235
2236         return view->presentation;
2237 }
2238
2239 void
2240 ev_view_set_sizing_mode (EvView       *view,
2241                          EvSizingMode  sizing_mode)
2242 {
2243         g_return_if_fail (EV_IS_VIEW (view));
2244
2245         if (view->sizing_mode == sizing_mode)
2246                 return;
2247
2248         view->sizing_mode = sizing_mode;
2249         gtk_widget_queue_resize (GTK_WIDGET (view));
2250
2251         g_object_notify (G_OBJECT (view), "sizing-mode");
2252 }
2253
2254 EvSizingMode
2255 ev_view_get_sizing_mode (EvView *view)
2256 {
2257         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
2258
2259         return view->sizing_mode;
2260 }
2261
2262 gboolean
2263 ev_view_can_zoom_in (EvView *view)
2264 {
2265         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
2266 }
2267
2268 gboolean
2269 ev_view_can_zoom_out (EvView *view)
2270 {
2271         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
2272 }
2273
2274 void
2275 ev_view_zoom_in (EvView *view)
2276 {
2277         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2278
2279         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
2280 }
2281
2282 void
2283 ev_view_zoom_out (EvView *view)
2284 {
2285         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2286
2287         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
2288 }
2289
2290
2291
2292 static double
2293 zoom_for_size_fit_width (int doc_width,
2294                          int doc_height,
2295                          int target_width,
2296                          int target_height,
2297                          int vsb_width)
2298 {
2299         double scale;
2300
2301         scale = (double)target_width / doc_width;
2302
2303         if (doc_height * scale > target_height)
2304                 scale = (double) (target_width - vsb_width) / doc_width;
2305
2306         return scale;
2307 }
2308
2309 static double
2310 zoom_for_size_best_fit (int doc_width,
2311                         int doc_height,
2312                         int target_width,
2313                         int target_height,
2314                         int vsb_width,
2315                         int hsb_width)
2316 {
2317         double w_scale;
2318         double h_scale;
2319
2320         w_scale = (double)target_width / doc_width;
2321         h_scale = (double)target_height / doc_height;
2322
2323         if (doc_height * w_scale > target_height)
2324                 w_scale = (double) (target_width - vsb_width) / doc_width;
2325         if (doc_width * h_scale > target_width)
2326                 h_scale = (double) (target_height - hsb_width) / doc_height;
2327
2328         return MIN (w_scale, h_scale);
2329 }
2330
2331
2332 static void
2333 ev_view_zoom_for_size_presentation (EvView *view,
2334                                     int     width,
2335                                     int     height)
2336 {
2337         int doc_width, doc_height;
2338         gdouble scale;
2339
2340         ev_page_cache_get_size (view->page_cache,
2341                                 view->current_page,
2342                                 1.0,
2343                                 &doc_width,
2344                                 &doc_height);
2345         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
2346         ev_view_set_zoom (view, scale, FALSE);
2347 }
2348
2349 static void
2350 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
2351                            int     width,
2352                            int     height,
2353                            int     vsb_width,
2354                            int     hsb_height)
2355 {
2356         int doc_width, doc_height;
2357         GtkBorder border;
2358         gdouble scale;
2359
2360         ev_page_cache_get_max_width_size (view->page_cache,
2361                                           1.0,
2362                                           &doc_width, NULL);
2363         ev_page_cache_get_max_height_size (view->page_cache,
2364                                            1.0,
2365                                            NULL, &doc_height);
2366         compute_border (view, doc_width, doc_height, &border);
2367
2368         doc_width = doc_width * 2;
2369         width -= (2 * (border.left + border.right) + 3 * view->spacing);
2370         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2371
2372         /* FIXME: We really need to calculate the overall height here, not the
2373          * page height.  We assume there's always a vertical scrollbar for
2374          * now.  We need to fix this. */
2375         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2376                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2377         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2378                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2379         else
2380                 g_assert_not_reached ();
2381
2382         ev_view_set_zoom (view, scale, FALSE);
2383 }
2384
2385 static void
2386 ev_view_zoom_for_size_continuous (EvView *view,
2387                                   int     width,
2388                                   int     height,
2389                                   int     vsb_width,
2390                                   int     hsb_height)
2391 {
2392         int doc_width, doc_height;
2393         GtkBorder border;
2394         gdouble scale;
2395
2396         ev_page_cache_get_max_width_size (view->page_cache,
2397                                           1.0,
2398                                           &doc_width, NULL);
2399         ev_page_cache_get_max_height_size (view->page_cache,
2400                                            1.0,
2401                                            NULL, &doc_height);
2402         compute_border (view, doc_width, doc_height, &border);
2403
2404         width -= (border.left + border.right + 2 * view->spacing);
2405         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2406
2407         /* FIXME: We really need to calculate the overall height here, not the
2408          * page height.  We assume there's always a vertical scrollbar for
2409          * now.  We need to fix this. */
2410         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2411                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2412         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2413                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2414         else
2415                 g_assert_not_reached ();
2416
2417         ev_view_set_zoom (view, scale, FALSE);
2418 }
2419
2420 static void
2421 ev_view_zoom_for_size_dual_page (EvView *view,
2422                                  int     width,
2423                                  int     height,
2424                                  int     vsb_width,
2425                                  int     hsb_height)
2426 {
2427         GtkBorder border;
2428         gint doc_width, doc_height;
2429         gdouble scale;
2430         gint other_page;
2431
2432         other_page = view->current_page ^ 1;
2433
2434         /* Find the largest of the two. */
2435         ev_page_cache_get_size (view->page_cache,
2436                                 view->current_page,
2437                                 1.0,
2438                                 &doc_width, &doc_height);
2439
2440         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
2441                 gint width_2, height_2;
2442                 ev_page_cache_get_size (view->page_cache,
2443                                         other_page,
2444                                         1.0,
2445                                         &width_2, &height_2);
2446                 if (width_2 > doc_width)
2447                         doc_width = width_2;
2448                 if (height_2 > doc_height)
2449                         doc_height = height_2;
2450         }
2451         compute_border (view, doc_width, doc_height, &border);
2452
2453         doc_width = doc_width * 2;
2454         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
2455         height -= (border.top + border.bottom + 2 * view->spacing);
2456
2457         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2458                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2459         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2460                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2461         else
2462                 g_assert_not_reached ();
2463
2464         ev_view_set_zoom (view, scale, FALSE);
2465 }
2466
2467 static void
2468 ev_view_zoom_for_size_single_page (EvView *view,
2469                                    int     width,
2470                                    int     height,
2471                                    int     vsb_width,
2472                                    int     hsb_height)
2473 {
2474         int doc_width, doc_height;
2475         GtkBorder border;
2476         gdouble scale;
2477
2478         ev_page_cache_get_size (view->page_cache,
2479                                 view->current_page,
2480                                 1.0,
2481                                 &doc_width,
2482                                 &doc_height);
2483         /* Get an approximate border */
2484         compute_border (view, width, height, &border);
2485
2486         width -= (border.left + border.right + 2 * view->spacing);
2487         height -= (border.top + border.bottom + 2 * view->spacing);
2488
2489         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2490                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2491         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2492                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2493         else
2494                 g_assert_not_reached ();
2495
2496         ev_view_set_zoom (view, scale, FALSE);
2497 }
2498
2499
2500 void
2501 ev_view_zoom_normal (EvView *view)
2502 {
2503         ev_view_set_zoom (view, 1.0, FALSE);
2504 }
2505
2506 void
2507 ev_view_set_zoom_for_size (EvView *view,
2508                            int     width,
2509                            int     height,
2510                            int     vsb_width,
2511                            int     hsb_height)
2512 {
2513         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2514                           view->sizing_mode == EV_SIZING_BEST_FIT);
2515         g_return_if_fail (width >= 0);
2516         g_return_if_fail (height >= 0);
2517
2518         if (view->document == NULL)
2519                 return;
2520
2521         if (view->presentation)
2522                 ev_view_zoom_for_size_presentation (view, width, height);
2523         else if (view->continuous && view->dual_page)
2524                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
2525         else if (view->continuous)
2526                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
2527         else if (view->dual_page)
2528                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
2529         else
2530                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
2531 }
2532
2533 const char *
2534 ev_view_get_status (EvView *view)
2535 {
2536         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2537
2538         return view->status;
2539 }
2540
2541 const char *
2542 ev_view_get_find_status (EvView *view)
2543 {
2544         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2545
2546         return view->find_status;
2547 }
2548
2549 gboolean
2550 ev_view_can_find_next (EvView *view)
2551 {
2552         int n_results = 0;
2553
2554         if (EV_IS_DOCUMENT_FIND (view->document)) {
2555                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2556
2557                 ev_document_doc_mutex_lock ();
2558                 n_results = ev_document_find_get_n_results (find, view->current_page);
2559                 ev_document_doc_mutex_unlock ();
2560         }
2561
2562         return n_results > 0;
2563 }
2564
2565 void
2566 ev_view_find_next (EvView *view)
2567 {
2568         EvPageCache *page_cache;
2569         int n_results, n_pages;
2570         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2571
2572         page_cache = ev_document_get_page_cache (view->document);
2573         ev_document_doc_mutex_lock ();
2574         n_results = ev_document_find_get_n_results (find, view->current_page);
2575         ev_document_doc_mutex_unlock ();
2576
2577         n_pages = ev_page_cache_get_n_pages (page_cache);
2578
2579         view->find_result++;
2580
2581         if (view->find_result >= n_results) {
2582                 view->find_result = 0;
2583                 view->find_page++;
2584
2585                 if (view->find_page >= n_pages) {
2586                         view->find_page = 0;
2587                 }
2588
2589                 jump_to_find_page (view);
2590         } else {
2591                 jump_to_find_result (view);
2592                 gtk_widget_queue_draw (GTK_WIDGET (view));
2593         }
2594 }
2595
2596 void
2597 ev_view_find_previous (EvView *view)
2598 {
2599         int n_results, n_pages;
2600         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2601         EvPageCache *page_cache;
2602
2603         page_cache = ev_document_get_page_cache (view->document);
2604
2605         ev_document_doc_mutex_lock ();
2606         n_results = ev_document_find_get_n_results (find, view->current_page);
2607         ev_document_doc_mutex_unlock ();
2608
2609         n_pages = ev_page_cache_get_n_pages (page_cache);
2610
2611         view->find_result--;
2612
2613         if (view->find_result < 0) {
2614                 view->find_result = 0;
2615                 view->find_page--;
2616
2617                 if (view->find_page < 0) {
2618                         view->find_page = n_pages - 1;
2619                 }
2620
2621                 jump_to_find_page (view);
2622         } else {
2623                 jump_to_find_result (view);
2624                 gtk_widget_queue_draw (GTK_WIDGET (view));
2625         }
2626 }
2627
2628 void
2629 ev_view_hide_cursor (EvView *view)
2630 {
2631        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
2632 }
2633
2634 void
2635 ev_view_show_cursor (EvView *view)
2636 {
2637        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
2638 }
2639
2640
2641 GType
2642 ev_sizing_mode_get_type (void)
2643 {
2644   static GType etype = 0;
2645   if (etype == 0) {
2646     static const GEnumValue values[] = {
2647       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
2648       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
2649       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
2650       { 0, NULL, NULL }
2651     };
2652     etype = g_enum_register_static ("EvSizingMode", values);
2653   }
2654   return etype;
2655 }