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-selection.h"
  33 #include "ev-document-find.h"
  34 #include "ev-document-misc.h"
  35 #include "ev-debug.h"
  36 #include "ev-job-queue.h"
  37 #include "ev-page-cache.h"
  38 #include "ev-pixbuf-cache.h"
  39
  40 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  41 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  42 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  43
  44 enum {
  45         PROP_0,
  46         PROP_STATUS,
  47         PROP_FIND_STATUS,
  48         PROP_CONTINUOUS,
  49         PROP_DUAL_PAGE,
  50         PROP_FULLSCREEN,
  51         PROP_PRESENTATION,
  52         PROP_SIZING_MODE,
  53         PROP_ZOOM,
  54 };
  55
  56 enum {
  57         SIGNAL_BINDING_ACTIVATED,
  58         SIGNAL_ZOOM_INVALID,
  59         N_SIGNALS,
  60 };
  61
  62 enum {
  63         TARGET_STRING,
  64         TARGET_TEXT,
  65         TARGET_COMPOUND_TEXT,
  66         TARGET_UTF8_STRING,
  67         TARGET_TEXT_BUFFER_CONTENTS
  68 };
  69
  70 static const GtkTargetEntry targets[] = {
  71         { "STRING", 0, TARGET_STRING },
  72         { "TEXT",   0, TARGET_TEXT },
  73         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  74         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  75 };
  76
  77 static guint signals[N_SIGNALS];
  78
  79 typedef enum {
  80         EV_VIEW_CURSOR_NORMAL,
  81         EV_VIEW_CURSOR_IBEAM,
  82         EV_VIEW_CURSOR_LINK,
  83         EV_VIEW_CURSOR_WAIT,
  84         EV_VIEW_CURSOR_HIDDEN,
  85         EV_VIEW_CURSOR_DRAG
  86 } EvViewCursor;
  87
  88 #define ZOOM_IN_FACTOR  1.2
  89 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  90
  91 #define MIN_SCALE 0.05409
  92 #define MAX_SCALE 4.0
  93
  94 /* Information for middle clicking and moving around the doc */
  95 typedef struct {
  96         gboolean in_drag;
  97         GdkPoint start;
  98         gdouble hadj;
  99         gdouble vadj;
 100 } DragInfo;
 101
 102 /* Information for handling selection */
 103 typedef struct {
 104         gboolean in_selection;
 105         GdkPoint start;
 106         GList *selections;
 107 } SelectionInfo;
 108
 109 typedef enum {
 110         SCROLL_TO_KEEP_POSITION,
 111         SCROLL_TO_CURRENT_PAGE,
 112         SCROLL_TO_CENTER
 113 } PendingScroll;
 114
 115 struct _EvView {
 116         GtkWidget parent_instance;
 117
 118         EvDocument *document;
 119
 120         char *status;
 121         char *find_status;
 122
 123         gint scroll_x;
 124         gint scroll_y;
 125
 126         /* Information for middle clicking and dragging around. */
 127         DragInfo drag_info;
 128
 129         /* Selection */
 130         EvViewSelectionMode selection_mode;
 131         SelectionInfo selection_info;
 132
 133         gboolean pressed_button;
 134         EvViewCursor cursor;
 135
 136         GtkAdjustment *hadjustment;
 137         GtkAdjustment *vadjustment;
 138
 139         EvPageCache *page_cache;
 140         EvPixbufCache *pixbuf_cache;
 141
 142         gint start_page;
 143         gint end_page;
 144         gint current_page;
 145
 146         EvJobRender *current_job;
 147
 148         int find_page;
 149         int find_result;
 150         int spacing;
 151
 152         double scale;
 153
 154         gboolean continuous;
 155         gboolean dual_page;
 156         gboolean fullscreen;
 157         gboolean presentation;
 158         EvSizingMode sizing_mode;
 159
 160         PendingScroll pending_scroll;
 161         gboolean pending_resize;
 162 };
 163
 164 struct _EvViewClass {
 165         GtkWidgetClass parent_class;
 166
 167         void    (*set_scroll_adjustments) (EvView         *view,
 168                                            GtkAdjustment  *hadjustment,
 169                                            GtkAdjustment  *vadjustment);
 170         void    (*binding_activated)      (EvView         *view,
 171                                            GtkScrollType   scroll,
 172                                            gboolean        horizontal);
 173         void    (*zoom_invalid)           (EvView         *view);
 174 };
 175
 176 /*** Scrolling ***/
 177 static void       scroll_to_current_page                     (EvView *view,
 178                                                               GtkOrientation orientation);
 179 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 180                                                               GtkAdjustment      *hadjustment,
 181                                                               GtkAdjustment      *vadjustment);
 182 static void       view_update_range_and_current_page         (EvView             *view);
 183 static void       set_scroll_adjustment                      (EvView             *view,
 184                                                               GtkOrientation      orientation,
 185                                                               GtkAdjustment      *adjustment);
 186 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 187                                                               GtkAdjustment      *hadjustment,
 188                                                               GtkAdjustment      *vadjustment);
 189 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 190                                                               guint               keyval,
 191                                                               GtkScrollType       scroll,
 192                                                               gboolean            horizontal);
 193 static void       ev_view_binding_activated                  (EvView             *view,
 194                                                               GtkScrollType       scroll,
 195                                                               gboolean            horizontal);
 196 static void       ensure_rectangle_is_visible                (EvView             *view,
 197                                                               GdkRectangle       *rect);
 198
 199 /*** Geometry computations ***/
 200 static void       compute_border                             (EvView             *view,
 201                                                               int                 width,
 202                                                               int                 height,
 203                                                               GtkBorder          *border);
 204 static void       get_page_y_offset                          (EvView *view,
 205                                                               int page,
 206                                                               double zoom,
 207                                                               int *y_offset);
 208 static gboolean   get_page_extents                           (EvView             *view,
 209                                                               gint                page,
 210                                                               GdkRectangle       *page_area,
 211                                                               GtkBorder          *border);
 212 static void       view_rect_to_doc_rect                      (EvView             *view,
 213                                                               GdkRectangle       *view_rect,
 214                                                               GdkRectangle       *page_area,
 215                                                               EvRectangle        *doc_rect);
 216 static void       doc_rect_to_view_rect                      (EvView             *view,
 217                                                               int                 page,
 218                                                               EvRectangle        *doc_rect,
 219                                                               GdkRectangle       *view_rect);
 220 static void       find_page_at_location                      (EvView             *view,
 221                                                               gdouble             x,
 222                                                               gdouble             y,
 223                                                               gint               *page,
 224                                                               gint               *x_offset,
 225                                                               gint               *y_offset);
 226
 227 /*** Hyperrefs ***/
 228 static EvLink*    get_link_at_location                       (EvView             *view,
 229                                                               gdouble             x,
 230                                                               gdouble             y);
 231 static void       go_to_link                                 (EvView             *view,
 232                                                               EvLink             *link);
 233 static char*      status_message_from_link                   (EvView             *view,
 234                                                               EvLink             *link);
 235
 236 /*** GtkWidget implementation ***/
 237 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 238                                                               GtkRequisition     *requisition);
 239 static void       ev_view_size_request_continuous            (EvView             *view,
 240                                                               GtkRequisition     *requisition);
 241 static void       ev_view_size_request_dual_page             (EvView             *view,
 242                                                               GtkRequisition     *requisition);
 243 static void       ev_view_size_request_single_page           (EvView             *view,
 244                                                               GtkRequisition     *requisition);
 245 static void       ev_view_size_request                       (GtkWidget          *widget,
 246                                                               GtkRequisition     *requisition);
 247 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 248                                                               GtkAllocation      *allocation);
 249 static void       ev_view_realize                            (GtkWidget          *widget);
 250 static void       ev_view_unrealize                          (GtkWidget          *widget);
 251 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 252                                                               GdkEventScroll     *event);
 253 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 254                                                               GdkEventExpose     *event);
 255 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 256                                                               GdkEventButton     *event);
 257 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 258                                                               GdkEventMotion     *event);
 259 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 260                                                               GdkEventButton     *event);
 261
 262 /*** Drawing ***/
 263 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 264 static void       draw_rubberband                            (GtkWidget          *widget,
 265                                                               GdkWindow          *window,
 266                                                               const GdkRectangle *rect,
 267                                                               guchar              alpha);
 268 static void       highlight_find_results                     (EvView             *view,
 269                                                               int                 page);
 270 static void       draw_one_page                              (EvView             *view,
 271                                                               gint                page,
 272                                                               GdkRectangle       *page_area,
 273                                                               GtkBorder          *border,
 274                                                               GdkRectangle       *expose_area);
 275
 276 /*** Callbacks ***/
 277 static void       find_changed_cb                            (EvDocument         *document,
 278                                                               int                 page,
 279                                                               EvView             *view);
 280 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 281                                                               EvView             *view);
 282 static void       page_changed_cb                            (EvPageCache        *page_cache,
 283                                                               int                 new_page,
 284                                                               EvView             *view);
 285 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 286                                                               EvView             *view);
 287
 288 /*** GObject ***/
 289 static void       ev_view_finalize                           (GObject            *object);
 290 static void       ev_view_destroy                            (GtkObject          *object);
 291 static void       ev_view_set_property                       (GObject            *object,
 292                                                               guint               prop_id,
 293                                                               const GValue       *value,
 294                                                               GParamSpec         *pspec);
 295 static void       ev_view_get_property                       (GObject            *object,
 296                                                               guint               prop_id,
 297                                                               GValue             *value,
 298                                                               GParamSpec         *pspec);
 299 static void       ev_view_class_init                         (EvViewClass        *class);
 300 static void       ev_view_init                               (EvView             *view);
 301
 302 /*** Zoom and sizing ***/
 303 static double   zoom_for_size_fit_width                      (int doc_width,
 304                                                               int doc_height,
 305                                                               int target_width,
 306                                                               int target_height,
 307                                                               int vsb_width);
 308 static double   zoom_for_size_best_fit                       (int doc_width,
 309                                                               int doc_height,
 310                                                               int target_width,
 311                                                               int target_height,
 312                                                               int vsb_width,
 313                                                               int hsb_width);
 314 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 315                                                               int     width,
 316                                                               int     height);
 317 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 318                                                                 int     width,
 319                                                                 int     height,
 320                                                                 int     vsb_width,
 321                                                                 int     hsb_height);
 322 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 323                                                                 int     width,
 324                                                                 int     height,
 325                                                                 int     vsb_width,
 326                                                                 int     hsb_height);
 327 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 328                                                                 int     width,
 329                                                                 int     height,
 330                                                                 int     vsb_width,
 331                                                                 int     hsb_height);
 332 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 333                                                                 int     width,
 334                                                                 int     height,
 335                                                                 int     vsb_width,
 336                                                                 int     hsb_height);
 337 /*** Cursors ***/
 338 static GdkCursor* ev_view_create_invisible_cursor            (void);
 339 static void       ev_view_set_cursor                         (EvView             *view,
 340                                                               EvViewCursor        new_cursor);
 341
 342 /*** Status messages ***/
 343 static void       ev_view_set_status                         (EvView             *view,
 344                                                               const char         *message);
 345 static void       update_find_status_message                 (EvView             *view);
 346 static void       ev_view_set_find_status                    (EvView             *view,
 347                                                               const char         *message);
 348 /*** Find ***/
 349 static void       jump_to_find_result                        (EvView             *view);
 350 static void       jump_to_find_page                          (EvView             *view);
 351
 352 /*** Selection ***/
 353 static void       compute_selections                         (EvView             *view,
 354                                                               GdkPoint           *start,
 355                                                               GdkPoint           *stop);
 356 static void       clear_selection                            (EvView             *view);
 357 static char*      get_selected_text                          (EvView             *ev_view);
 358 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 359                                                               GtkSelectionData   *selection_data,
 360                                                               guint               info,
 361                                                               gpointer            data);
 362 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 363                                                               gpointer            data);
 364 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 365
 366
 367 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 368
 369 static void
 370 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 371 {
 372         GdkRectangle page_area;
 373         GtkBorder border;
 374
 375         get_page_extents (view, view->current_page, &page_area, &border);
 376
 377         if (orientation == GTK_ORIENTATION_VERTICAL) {
 378                 if (view->continuous) {
 379                         gtk_adjustment_clamp_page (view->vadjustment,
 380                                                    page_area.y - view->spacing,
 381                                                    page_area.y + view->vadjustment->page_size);
 382                 } else {
 383                         gtk_adjustment_set_value (view->vadjustment,
 384                                                   view->vadjustment->lower);
 385                 }
 386         } else {
 387                 if (view->dual_page) {
 388                         gtk_adjustment_clamp_page (view->hadjustment,
 389                                                    page_area.x,
 390                                                    page_area.x + view->hadjustment->page_size);
 391                 } else {
 392                         gtk_adjustment_set_value (view->hadjustment,
 393                                                   CLAMP (view->hadjustment->value,
 394                                                   view->hadjustment->lower,
 395                                                   view->hadjustment->upper -
 396                                                   view->hadjustment->page_size));
 397                 }
 398         }
 399 }
 400
 401 static void
 402 view_set_adjustment_values (EvView         *view,
 403                             GtkOrientation  orientation)
 404 {
 405         GtkWidget *widget = GTK_WIDGET (view);
 406         GtkAdjustment *adjustment;
 407         int requisition;
 408         int allocation;
 409
 410         double factor;
 411         gint new_value;
 412
 413         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 414                 requisition = widget->requisition.width;
 415                 allocation = widget->allocation.width;
 416                 adjustment = view->hadjustment;
 417         } else {
 418                 requisition = widget->requisition.height;
 419                 allocation = widget->allocation.height;
 420                 adjustment = view->vadjustment;
 421         }
 422
 423         if (!adjustment)
 424                 return;
 425
 426         factor = 1.0;
 427         switch (view->pending_scroll) {
 428                 case SCROLL_TO_KEEP_POSITION:
 429                         factor = (adjustment->value) / adjustment->upper;
 430                         break;
 431                 case SCROLL_TO_CURRENT_PAGE:
 432                         break;
 433                 case SCROLL_TO_CENTER:
 434                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 435                         break;
 436         }
 437
 438         adjustment->page_size = allocation;
 439         adjustment->step_increment = allocation * 0.1;
 440         adjustment->page_increment = allocation * 0.9;
 441         adjustment->lower = 0;
 442         adjustment->upper = MAX (allocation, requisition);
 443
 444         /*
 445          * We add 0.5 to the values before to average out our rounding errors.
 446          */
 447         switch (view->pending_scroll) {
 448                 case SCROLL_TO_KEEP_POSITION:
 449                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 450                         gtk_adjustment_set_value (adjustment, (int)new_value);
 451                         break;
 452                 case SCROLL_TO_CURRENT_PAGE:
 453                         scroll_to_current_page (view, orientation);
 454                         break;
 455                 case SCROLL_TO_CENTER:
 456                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 457                                            0, adjustment->upper - adjustment->page_size);
 458                         gtk_adjustment_set_value (adjustment, (int)new_value);
 459                         break;
 460         }
 461
 462         gtk_adjustment_changed (adjustment);
 463 }
 464
 465 static void
 466 view_update_range_and_current_page (EvView *view)
 467 {
 468         /* Presentation trumps all other modes */
 469         if (view->presentation) {
 470                 view->start_page = view->current_page;
 471                 view->end_page = view->current_page;
 472         } else if (view->continuous) {
 473                 GdkRectangle current_area, unused, page_area;
 474                 GtkBorder border;
 475                 gint current_page;
 476                 gboolean found = FALSE;
 477                 int i;
 478
 479                 if (!(view->vadjustment && view->hadjustment))
 480                         return;
 481
 482                 current_area.x = view->hadjustment->value;
 483                 current_area.width = view->hadjustment->upper;
 484                 current_area.y = view->vadjustment->value;
 485                 current_area.height = view->vadjustment->page_size;
 486
 487                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 488
 489                         get_page_extents (view, i, &page_area, &border);
 490
 491                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 492                                 if (! found) {
 493                                         view->start_page = i;
 494                                         found = TRUE;
 495
 496                                 }
 497                                 view->end_page = i;
 498                         } else if (found) {
 499                                 break;
 500                         }
 501                 }
 502
 503                 current_page = ev_page_cache_get_current_page (view->page_cache);
 504
 505                 if (current_page < view->start_page || current_page > view->end_page) {
 506                         view->current_page = view->start_page;
 507                         ev_page_cache_set_current_page (view->page_cache, view->start_page);
 508                 }
 509         } else {
 510                 if (view->dual_page) {
 511                         if (view->current_page % 2 == 0) {
 512                                 view->start_page = view->current_page;
 513                                 if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 514                                         view->end_page = view->start_page + 1;
 515                         } else {
 516                                 view->start_page = view->current_page - 1;
 517                                 view->end_page = view->current_page;
 518                         }
 519                 } else {
 520                         view->start_page = view->current_page;
 521                         view->end_page = view->current_page;
 522                 }
 523         }
 524
 525         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 526                                         view->start_page,
 527                                         view->end_page,
 528                                         view->scale,
 529                                         view->selection_info.selections);
 530 }
 531
 532 static void
 533 set_scroll_adjustment (EvView *view,
 534                        GtkOrientation  orientation,
 535                        GtkAdjustment  *adjustment)
 536 {
 537         GtkAdjustment **to_set;
 538
 539         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 540                 to_set = &view->hadjustment;
 541         else
 542                 to_set = &view->vadjustment;
 543
 544         if (*to_set != adjustment) {
 545                 if (*to_set) {
 546                         g_signal_handlers_disconnect_by_func (*to_set,
 547                                                               (gpointer) on_adjustment_value_changed,
 548                                                               view);
 549                         g_object_unref (*to_set);
 550                 }
 551
 552                 *to_set = adjustment;
 553                 view_set_adjustment_values (view, orientation);
 554
 555                 if (*to_set) {
 556                         g_object_ref (*to_set);
 557                         g_signal_connect (*to_set, "value_changed",
 558                                           G_CALLBACK (on_adjustment_value_changed), view);
 559                 }
 560         }
 561 }
 562
 563 static void
 564 ev_view_set_scroll_adjustments (EvView *view,
 565                                 GtkAdjustment  *hadjustment,
 566                                 GtkAdjustment  *vadjustment)
 567 {
 568         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 569         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 570
 571         on_adjustment_value_changed (NULL, view);
 572 }
 573
 574 static void
 575 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 576                            guint           keyval,
 577                            GtkScrollType   scroll,
 578                            gboolean        horizontal)
 579 {
 580   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 581
 582   gtk_binding_entry_add_signal (binding_set, keyval, 0,
 583                                 "binding_activated", 2,
 584                                 GTK_TYPE_SCROLL_TYPE, scroll,
 585                                 G_TYPE_BOOLEAN, horizontal);
 586   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
 587                                 "binding_activated", 2,
 588                                 GTK_TYPE_SCROLL_TYPE, scroll,
 589                                 G_TYPE_BOOLEAN, horizontal);
 590 }
 591
 592 void
 593 ev_view_scroll (EvView        *view,
 594                 EvScrollType   scroll)
 595 {
 596         GtkAdjustment *adjustment;
 597         double value, increment;
 598         gboolean first_page = FALSE;
 599         gboolean last_page = FALSE;
 600
 601         /* Assign values for increment and vertical adjustment */
 602         adjustment = view->vadjustment;
 603         increment = adjustment->page_size * 0.75;
 604         value = adjustment->value;
 605
 606         /* Assign boolean for first and last page */
 607         if (view->current_page == 0)
 608                 first_page = TRUE;
 609         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 610                 last_page = TRUE;
 611
 612         switch (scroll) {
 613                 case EV_SCROLL_PAGE_BACKWARD:
 614                         /* Do not jump backwards if at the first page */
 615                         if (value == (adjustment->lower) && first_page) {
 616                                 /* Do nothing */
 617                                 /* At the top of a page, assign the upper bound limit of previous page */
 618                         } else if (value == (adjustment->lower)) {
 619                                 value = adjustment->upper - adjustment->page_size;
 620                                 ev_page_cache_set_current_page (view->page_cache, view->current_page - 1);
 621                                 /* Jump to the top */
 622                         } else {
 623                                 value = MAX (value - increment, adjustment->lower);
 624                         }
 625                         break;
 626                 case EV_SCROLL_PAGE_FORWARD:
 627                         /* Do not jump forward if at the last page */
 628                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 629                                 /* Do nothing */
 630                         /* At the bottom of a page, assign the lower bound limit of next page */
 631                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 632                                 value = 0;
 633                                 ev_page_cache_set_current_page (view->page_cache, view->current_page + 1);
 634                         /* Jump to the bottom */
 635                         } else {
 636                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 637                         }
 638                         break;
 639                 default:
 640                         break;
 641         }
 642
 643         gtk_adjustment_set_value (adjustment, value);
 644 }
 645
 646 static void
 647 ev_view_binding_activated (EvView *view,
 648                            GtkScrollType scroll,
 649                            gboolean horizontal)
 650 {
 651         GtkAdjustment *adjustment;
 652         double value;
 653
 654         if (view->presentation) {
 655                 switch (scroll) {
 656                         case GTK_SCROLL_STEP_BACKWARD:
 657                                 ev_page_cache_prev_page (view->page_cache);
 658                                 break;
 659                         case GTK_SCROLL_STEP_FORWARD:
 660                                 ev_page_cache_next_page (view->page_cache);
 661                                 break;
 662                         default:
 663                                 break;
 664                 }
 665                 return;
 666         }
 667
 668         if (horizontal) {
 669                 adjustment = view->hadjustment;
 670         } else {
 671                 adjustment = view->vadjustment;
 672         }
 673
 674         value = adjustment->value;
 675
 676         switch (scroll) {
 677                 case GTK_SCROLL_STEP_BACKWARD:
 678                         value -= adjustment->step_increment;
 679                         break;
 680                 case GTK_SCROLL_STEP_FORWARD:
 681                         value += adjustment->step_increment;
 682                         break;
 683                 default:
 684                         break;
 685         }
 686
 687         value = CLAMP (value, adjustment->lower,
 688                        adjustment->upper - adjustment->page_size);
 689
 690         gtk_adjustment_set_value (adjustment, value);
 691 }
 692
 693 #define MARGIN 5
 694
 695 static void
 696 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 697 {
 698         GtkWidget *widget = GTK_WIDGET (view);
 699         GtkAdjustment *adjustment;
 700         int value;
 701
 702         adjustment = view->vadjustment;
 703
 704         if (rect->y < adjustment->value) {
 705                 value = MAX (adjustment->lower, rect->y - MARGIN);
 706                 gtk_adjustment_set_value (view->vadjustment, value);
 707         } else if (rect->y + rect->height >
 708                    adjustment->value + widget->allocation.height) {
 709                 value = MIN (adjustment->upper, rect->y + rect->height -
 710                              widget->allocation.height + MARGIN);
 711                 gtk_adjustment_set_value (view->vadjustment, value);
 712         }
 713
 714         adjustment = view->hadjustment;
 715
 716         if (rect->x < adjustment->value) {
 717                 value = MAX (adjustment->lower, rect->x - MARGIN);
 718                 gtk_adjustment_set_value (view->hadjustment, value);
 719         } else if (rect->x + rect->height >
 720                    adjustment->value + widget->allocation.width) {
 721                 value = MIN (adjustment->upper, rect->x + rect->width -
 722                              widget->allocation.width + MARGIN);
 723                 gtk_adjustment_set_value (view->hadjustment, value);
 724         }
 725 }
 726
 727 /*** Geometry computations ***/
 728
 729 static void
 730 compute_border (EvView *view, int width, int height, GtkBorder *border)
 731 {
 732         if (view->presentation) {
 733                 border->left = 0;
 734                 border->right = 0;
 735                 border->top = 0;
 736                 border->bottom = 0;
 737         } else {
 738                 ev_document_misc_get_page_border_size (width, height, border);
 739         }
 740 }
 741
 742 static void       get_page_y_offset                          (EvView *view,
 743                                                               int page,
 744                                                               double zoom,
 745                                                               int *y_offset)
 746 {
 747         int max_width, offset;
 748         GtkBorder border;
 749
 750         g_return_if_fail (y_offset != NULL);
 751
 752         ev_page_cache_get_max_width (view->page_cache, zoom, &max_width);
 753
 754         compute_border (view, max_width, max_width, &border);
 755
 756         if (view->dual_page) {
 757                 ev_page_cache_get_height_to_page (view->page_cache, page, zoom, NULL, &offset);
 758                 offset += (page / 2 + 1) * view->spacing + (page / 2) * (border.top + border.bottom);
 759         } else {
 760                 ev_page_cache_get_height_to_page (view->page_cache, page, zoom, &offset, NULL);
 761                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 762         }
 763
 764         *y_offset = offset;
 765         return;
 766 }
 767
 768 static gboolean
 769 get_page_extents (EvView       *view,
 770                   gint          page,
 771                   GdkRectangle *page_area,
 772                   GtkBorder    *border)
 773 {
 774         GtkWidget *widget;
 775         int width, height;
 776
 777         widget = GTK_WIDGET (view);
 778
 779         /* Get the size of the page */
 780         ev_page_cache_get_size (view->page_cache, page,
 781                                 view->scale,
 782                                 &width, &height);
 783         compute_border (view, width, height, border);
 784         page_area->width = width + border->left + border->right;
 785         page_area->height = height + border->top + border->bottom;
 786
 787         if (view->presentation) {
 788                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 789                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 790         } else if (view->continuous) {
 791                 gint max_width;
 792                 gint x, y;
 793
 794                 ev_page_cache_get_max_width (view->page_cache, view->scale, &max_width);
 795                 max_width = max_width + border->left + border->right;
 796                 /* Get the location of the bounding box */
 797                 if (view->dual_page) {
 798                         x = view->spacing + (page % 2) * (max_width + view->spacing);
 799                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 800                         if (page % 2 == 0)
 801                                 x = x + (max_width - width - border->left - border->right);
 802                 } else {
 803                         x = view->spacing;
 804                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 805                 }
 806
 807                 get_page_y_offset (view, page, view->scale, &y);
 808
 809                 page_area->x = x;
 810                 page_area->y = y;
 811         } else {
 812                 gint x, y;
 813                 if (view->dual_page) {
 814                         gint width_2, height_2;
 815                         gint max_width = width;
 816                         gint max_height = height;
 817                         GtkBorder overall_border;
 818                         gint other_page;
 819
 820                         other_page = page ^ 1;
 821
 822                         /* First, we get the bounding box of the two pages */
 823                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
 824                                 ev_page_cache_get_size (view->page_cache,
 825                                                         other_page,
 826                                                         view->scale,
 827                                                         &width_2, &height_2);
 828                                 if (width_2 > width)
 829                                         max_width = width_2;
 830                                 if (height_2 > height)
 831                                         max_height = height_2;
 832                         }
 833                         compute_border (view, max_width, max_height, &overall_border);
 834
 835                         /* Find the offsets */
 836                         x = view->spacing;
 837                         y = view->spacing;
 838
 839                         /* Adjust for being the left or right page */
 840                         if (page % 2 == 0)
 841                                 x = x + max_width - width;
 842                         else
 843                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 844
 845                         y = y + (max_height - height)/2;
 846
 847                         /* Adjust for extra allocation */
 848                         x = x + MAX (0, widget->allocation.width -
 849                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 850                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 851                 } else {
 852                         x = view->spacing;
 853                         y = view->spacing;
 854
 855                         /* Adjust for extra allocation */
 856                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 857                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 858                 }
 859
 860                 page_area->x = x;
 861                 page_area->y = y;
 862         }
 863
 864         return TRUE;
 865 }
 866
 867 static void
 868 view_point_to_doc_point (EvView *view,
 869                          GdkPoint *view_point,
 870                          GdkRectangle *page_area,
 871                          double  *doc_point_x,
 872                          double  *doc_point_y)
 873 {
 874         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 875         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 876 }
 877
 878 static void
 879 view_rect_to_doc_rect (EvView *view,
 880                        GdkRectangle *view_rect,
 881                        GdkRectangle *page_area,
 882                        EvRectangle  *doc_rect)
 883 {
 884         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 885         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 886         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 887         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 888 }
 889
 890 static void
 891 doc_rect_to_view_rect (EvView       *view,
 892                        int           page,
 893                        EvRectangle  *doc_rect,
 894                        GdkRectangle *view_rect)
 895 {
 896         GdkRectangle page_area;
 897         GtkBorder border;
 898         int width, height;
 899
 900         get_page_extents (view, page, &page_area, &border);
 901
 902         width = doc_rect->x2 - doc_rect->x1;
 903         height = doc_rect->y2 - doc_rect->y1;
 904         view_rect->x = floor (doc_rect->x1 * view->scale) + page_area.x;
 905         view_rect->y = floor (doc_rect->y1 * view->scale) + page_area.y;
 906         view_rect->width = ceil (width * view->scale);
 907         view_rect->height = ceil (height * view->scale);
 908 }
 909
 910 static void
 911 find_page_at_location (EvView  *view,
 912                        gdouble  x,
 913                        gdouble  y,
 914                        gint    *page,
 915                        gint    *x_offset,
 916                        gint    *y_offset)
 917 {
 918         int i;
 919
 920         if (view->document == NULL)
 921                 return;
 922
 923         g_assert (page);
 924         g_assert (x_offset);
 925         g_assert (y_offset);
 926
 927         for (i = view->start_page; i <= view->end_page; i++) {
 928                 GdkRectangle page_area;
 929                 GtkBorder border;
 930
 931                 if (! get_page_extents (view, i, &page_area, &border))
 932                         continue;
 933
 934                 if ((x >= page_area.x + border.left) &&
 935                     (x < page_area.x + page_area.width - border.right) &&
 936                     (y >= page_area.y + border.top) &&
 937                     (y < page_area.y + page_area.height - border.bottom)) {
 938                         *page = i;
 939                         *x_offset = x - (page_area.x + border.left);
 940                         *y_offset = y - (page_area.y + border.top);
 941                         return;
 942                 }
 943         }
 944
 945         *page = -1;
 946 }
 947
 948 static gboolean
 949 location_in_text (EvView  *view,
 950                   gdouble  x,
 951                   gdouble  y)
 952 {
 953         GdkRegion *region;
 954         gint page = -1;
 955         gint x_offset = 0, y_offset = 0;
 956
 957         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
 958
 959         if (page == -1)
 960                 return FALSE;
 961
 962         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
 963
 964         if (region)
 965                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
 966         else
 967                 return FALSE;
 968 }
 969
 970 /*** Hyperref ***/
 971 static EvLink *
 972 get_link_at_location (EvView  *view,
 973                       gdouble  x,
 974                       gdouble  y)
 975 {
 976         gint page = -1;
 977         gint x_offset = 0, y_offset = 0;
 978         GList *link_mapping;
 979
 980         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
 981
 982         if (page == -1)
 983                 return NULL;
 984
 985         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
 986
 987         if (link_mapping)
 988                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
 989         else
 990                 return NULL;
 991 }
 992
 993 /* FIXME: standardize this sometime */
 994 static void
 995 go_to_link (EvView *view, EvLink *link)
 996 {
 997         EvLinkType type;
 998         const char *uri;
 999         int page;
1000
1001         type = ev_link_get_link_type (link);
1002
1003         switch (type) {
1004                 case EV_LINK_TYPE_TITLE:
1005                         break;
1006                 case EV_LINK_TYPE_PAGE:
1007                         page = ev_link_get_page (link);
1008                         ev_page_cache_set_current_page (view->page_cache, page);
1009                         break;
1010                 case EV_LINK_TYPE_EXTERNAL_URI:
1011                         uri = ev_link_get_uri (link);
1012                         gnome_vfs_url_show (uri);
1013                         break;
1014         }
1015 }
1016
1017 static char *
1018 status_message_from_link (EvView *view, EvLink *link)
1019 {
1020         EvLinkType type;
1021         char *msg = NULL;
1022         char *page_label;
1023
1024         type = ev_link_get_link_type (link);
1025
1026         switch (type) {
1027                 case EV_LINK_TYPE_TITLE:
1028                         if (ev_link_get_title (link))
1029                                 msg = g_strdup (ev_link_get_title (link));
1030                         break;
1031                 case EV_LINK_TYPE_PAGE:
1032                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
1033                         msg = g_strdup_printf (_("Go to page %s"), page_label);
1034                         g_free (page_label);
1035                         break;
1036                 case EV_LINK_TYPE_EXTERNAL_URI:
1037                         msg = g_strdup (ev_link_get_uri (link));
1038                         break;
1039                 default:
1040                         break;
1041         }
1042
1043         return msg;
1044 }
1045
1046
1047 /*** GtkWidget implementation ***/
1048
1049 static void
1050 ev_view_size_request_continuous_dual_page (EvView         *view,
1051                                            GtkRequisition *requisition)
1052 {
1053         int max_width;
1054         gint n_pages;
1055         GtkBorder border;
1056
1057         ev_page_cache_get_max_width (view->page_cache, view->scale, &max_width);
1058         compute_border (view, max_width, max_width, &border);
1059
1060         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
1061
1062         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
1063         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1064
1065         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1066                 requisition->width = 1;
1067         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1068                 requisition->width = 1;
1069                 /* FIXME: This could actually be set on one page docs or docs
1070                  * with a strange aspect ratio. */
1071                 /* requisition->height = 1;*/
1072         }
1073 }
1074
1075 static void
1076 ev_view_size_request_continuous (EvView         *view,
1077                                  GtkRequisition *requisition)
1078 {
1079         int max_width;
1080         int n_pages;
1081         GtkBorder border;
1082
1083
1084         ev_page_cache_get_max_width (view->page_cache, view->scale, &max_width);
1085         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1086         compute_border (view, max_width, max_width, &border);
1087
1088         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
1089         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1090
1091         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1092                 requisition->width = 1;
1093         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1094                 requisition->width = 1;
1095                 /* FIXME: This could actually be set on one page docs or docs
1096                  * with a strange aspect ratio. */
1097                 /* requisition->height = 1;*/
1098         }
1099 }
1100
1101 static void
1102 ev_view_size_request_dual_page (EvView         *view,
1103                                 GtkRequisition *requisition)
1104 {
1105         GtkBorder border;
1106         gint width, height;
1107
1108         /* Find the largest of the two. */
1109         ev_page_cache_get_size (view->page_cache,
1110                                 view->current_page,
1111                                 view->scale,
1112                                 &width, &height);
1113         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1114                 gint width_2, height_2;
1115                 ev_page_cache_get_size (view->page_cache,
1116                                         view->current_page + 1,
1117                                         view->scale,
1118                                         &width_2, &height_2);
1119                 if (width_2 > width) {
1120                         width = width_2;
1121                         height = height_2;
1122                 }
1123         }
1124         compute_border (view, width, height, &border);
1125
1126         requisition->width = ((width + border.left + border.right) * 2) +
1127                 (view->spacing * 3);
1128         requisition->height = (height + border.top + border.bottom) +
1129                 (view->spacing * 2);
1130
1131         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1132                 requisition->width = 1;
1133         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1134                 requisition->width = 1;
1135                 requisition->height = 1;
1136         }
1137 }
1138
1139 static void
1140 ev_view_size_request_single_page (EvView         *view,
1141                                   GtkRequisition *requisition)
1142 {
1143         GtkBorder border;
1144         gint width, height;
1145
1146         ev_page_cache_get_size (view->page_cache,
1147                                 view->current_page,
1148                                 view->scale,
1149                                 &width, &height);
1150         compute_border (view, width, height, &border);
1151
1152         requisition->width = width + border.left + border.right + (2 * view->spacing);
1153         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1154
1155         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1156                 requisition->width = 1;
1157                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1158         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1159                 requisition->width = 1;
1160                 requisition->height = 1;
1161         }
1162 }
1163
1164 static void
1165 ev_view_size_request (GtkWidget      *widget,
1166                       GtkRequisition *requisition)
1167 {
1168         EvView *view = EV_VIEW (widget);
1169
1170         if (view->document == NULL) {
1171                 requisition->width = 1;
1172                 requisition->height = 1;
1173                 return;
1174         }
1175
1176         if (view->presentation) {
1177                 requisition->width = 1;
1178                 requisition->height = 1;
1179                 return;
1180         }
1181
1182         if (view->continuous && view->dual_page)
1183                 ev_view_size_request_continuous_dual_page (view, requisition);
1184         else if (view->continuous)
1185                 ev_view_size_request_continuous (view, requisition);
1186         else if (view->dual_page)
1187                 ev_view_size_request_dual_page (view, requisition);
1188         else
1189                 ev_view_size_request_single_page (view, requisition);
1190 }
1191
1192 static void
1193 ev_view_size_allocate (GtkWidget      *widget,
1194                        GtkAllocation  *allocation)
1195 {
1196         EvView *view = EV_VIEW (widget);
1197
1198         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1199                   view->sizing_mode == EV_SIZING_BEST_FIT) {
1200
1201                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1202
1203                 ev_view_size_request (widget, &widget->requisition);
1204         }
1205
1206         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1207         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1208
1209         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1210         view->pending_resize = FALSE;
1211
1212         if (view->document)
1213                 view_update_range_and_current_page (view);
1214
1215         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1216 }
1217
1218 static void
1219 ev_view_realize (GtkWidget *widget)
1220 {
1221         EvView *view = EV_VIEW (widget);
1222         GdkWindowAttr attributes;
1223
1224         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1225
1226
1227         attributes.window_type = GDK_WINDOW_CHILD;
1228         attributes.wclass = GDK_INPUT_OUTPUT;
1229         attributes.visual = gtk_widget_get_visual (widget);
1230         attributes.colormap = gtk_widget_get_colormap (widget);
1231
1232         attributes.x = widget->allocation.x;
1233         attributes.y = widget->allocation.y;
1234         attributes.width = widget->allocation.width;
1235         attributes.height = widget->allocation.height;
1236         attributes.event_mask = GDK_EXPOSURE_MASK |
1237                                 GDK_BUTTON_PRESS_MASK |
1238                                 GDK_BUTTON_RELEASE_MASK |
1239                                 GDK_SCROLL_MASK |
1240                                 GDK_KEY_PRESS_MASK |
1241                                 GDK_POINTER_MOTION_MASK |
1242                                 GDK_LEAVE_NOTIFY_MASK;
1243
1244         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1245                                          &attributes,
1246                                          GDK_WA_X | GDK_WA_Y |
1247                                          GDK_WA_COLORMAP |
1248                                          GDK_WA_VISUAL);
1249         gdk_window_set_user_data (widget->window, widget);
1250         widget->style = gtk_style_attach (widget->style, widget->window);
1251
1252         if (view->presentation)
1253                 gdk_window_set_background (widget->window, &widget->style->black);
1254         else
1255                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1256 }
1257
1258 static void
1259 ev_view_unrealize (GtkWidget *widget)
1260 {
1261         GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
1262 }
1263
1264 static gboolean
1265 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1266 {
1267         EvView *view = EV_VIEW (widget);
1268
1269         if ((event->state & GDK_CONTROL_MASK) != 0) {
1270
1271                  ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1272
1273                  if (event->direction == GDK_SCROLL_UP ||
1274                         event->direction == GDK_SCROLL_LEFT) {
1275                             if (ev_view_can_zoom_in (view)) {
1276                                     ev_view_zoom_in (view);
1277                             }
1278                  } else {
1279                             if (ev_view_can_zoom_out (view)) {
1280                                     ev_view_zoom_out (view);
1281                             }
1282                  }
1283                  return TRUE;
1284         }
1285
1286         if ((event->state & GDK_SHIFT_MASK) != 0) {
1287                 if (event->direction == GDK_SCROLL_UP)
1288                         event->direction = GDK_SCROLL_LEFT;
1289                 if (event->direction == GDK_SCROLL_DOWN)
1290                         event->direction = GDK_SCROLL_RIGHT;
1291         }
1292
1293         return FALSE;
1294 }
1295
1296 static EvViewSelection *
1297 find_selection_for_page (EvView *view,
1298                          gint    page)
1299 {
1300         GList *list;
1301
1302         for (list = view->selection_info.selections; list != NULL; list = list->next) {
1303                 EvViewSelection *selection;
1304
1305                 selection = (EvViewSelection *) list->data;
1306
1307                 if (selection->page == page)
1308                         return selection;
1309         }
1310
1311         return NULL;
1312 }
1313
1314 static gboolean
1315 ev_view_expose_event (GtkWidget      *widget,
1316                       GdkEventExpose *event)
1317 {
1318         EvView *view = EV_VIEW (widget);
1319         int i;
1320
1321         if (view->document == NULL)
1322                 return FALSE;
1323
1324         for (i = view->start_page; i <= view->end_page; i++) {
1325                 GdkRectangle page_area;
1326                 GtkBorder border;
1327
1328                 if (!get_page_extents (view, i, &page_area, &border))
1329                         continue;
1330
1331                 page_area.x -= view->scroll_x;
1332                 page_area.y -= view->scroll_y;
1333
1334                 draw_one_page (view, i, &page_area, &border, &(event->area));
1335
1336                 if (EV_IS_DOCUMENT_FIND (view->document))
1337                         highlight_find_results (view, i);
1338         }
1339
1340         return FALSE;
1341 }
1342
1343 static gboolean
1344 ev_view_button_press_event (GtkWidget      *widget,
1345                             GdkEventButton *event)
1346 {
1347         EvView *view = EV_VIEW (widget);
1348
1349         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1350                 gtk_widget_grab_focus (widget);
1351         }
1352
1353         view->pressed_button = event->button;
1354
1355         switch (event->button) {
1356                 case 1:
1357                         if (view->selection_info.selections) {
1358                                 clear_selection (view);
1359                                 gtk_widget_queue_draw (widget);
1360                         }
1361
1362                         view->selection_info.start.x = event->x + view->scroll_x;
1363                         view->selection_info.start.y = event->y + view->scroll_y;
1364                         return TRUE;
1365                 case 2:
1366                         /* use root coordinates as reference point because
1367                          * scrolling changes window relative coordinates */
1368                         view->drag_info.start.x = event->x_root;
1369                         view->drag_info.start.y = event->y_root;
1370                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1371                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1372
1373                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1374
1375                         return TRUE;
1376         }
1377
1378         return FALSE;
1379 }
1380
1381 static gboolean
1382 ev_view_motion_notify_event (GtkWidget      *widget,
1383                              GdkEventMotion *event)
1384 {
1385         EvView *view = EV_VIEW (widget);
1386
1387         if (!view->document)
1388                 return FALSE;
1389
1390         if (view->pressed_button == 1) {
1391                 GdkPoint point;
1392
1393                 view->selection_info.in_selection = TRUE;
1394                 point.x = event->x + view->scroll_x;
1395                 point.y = event->y + view->scroll_y;
1396                 compute_selections (view, &view->selection_info.start, &point);
1397
1398                 return TRUE;
1399         } else if (view->pressed_button == 2) {
1400                 if (!view->drag_info.in_drag) {
1401                         gboolean start;
1402
1403                         start = gtk_drag_check_threshold (widget,
1404                                                           view->drag_info.start.x,
1405                                                           view->drag_info.start.y,
1406                                                           event->x_root,
1407                                                           event->y_root);
1408                         view->drag_info.in_drag = start;
1409                 }
1410
1411                 if (view->drag_info.in_drag) {
1412                         int dx, dy;
1413                         gdouble dhadj_value, dvadj_value;
1414
1415                         dx = event->x_root - view->drag_info.start.x;
1416                         dy = event->y_root - view->drag_info.start.y;
1417
1418                         dhadj_value = view->hadjustment->page_size *
1419                                       (gdouble)dx / widget->allocation.width;
1420                         dvadj_value = view->vadjustment->page_size *
1421                                       (gdouble)dy / widget->allocation.height;
1422
1423                         /* clamp scrolling to visible area */
1424                         gtk_adjustment_set_value (view->hadjustment,
1425                                                   MIN(view->drag_info.hadj - dhadj_value,
1426                                                       view->hadjustment->upper -
1427                                                       view->hadjustment->page_size));
1428                         gtk_adjustment_set_value (view->vadjustment,
1429                                                   MIN(view->drag_info.vadj - dvadj_value,
1430                                                       view->vadjustment->upper -
1431                                                       view->vadjustment->page_size));
1432
1433                         return TRUE;
1434                 }
1435         } else if (view->pressed_button <= 0) {
1436                 EvLink *link;
1437
1438                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1439                 if (link) {
1440                         char *msg;
1441
1442                         msg = status_message_from_link (view, link);
1443                         ev_view_set_status (view, msg);
1444                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1445                         g_free (msg);
1446                 } else if (location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y)) {
1447                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1448                 } else {
1449                         ev_view_set_status (view, NULL);
1450                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1451                             view->cursor == EV_VIEW_CURSOR_IBEAM)
1452                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1453                 }
1454                 return TRUE;
1455         }
1456
1457         return FALSE;
1458 }
1459
1460 static gboolean
1461 ev_view_button_release_event (GtkWidget      *widget,
1462                               GdkEventButton *event)
1463 {
1464         EvView *view = EV_VIEW (widget);
1465
1466         if (view->pressed_button == 2) {
1467                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1468         }
1469
1470         view->pressed_button = -1;
1471         view->drag_info.in_drag = FALSE;
1472
1473         if (view->selection_info.selections) {
1474                 ev_view_update_primary_selection (view);
1475         } else if (view->document) {
1476                 EvLink *link;
1477
1478                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1479                 if (link) {
1480                         go_to_link (view, link);
1481                 }
1482         }
1483
1484         return FALSE;
1485 }
1486
1487 /*** Drawing ***/
1488
1489 static guint32
1490 ev_gdk_color_to_rgb (const GdkColor *color)
1491 {
1492   guint32 result;
1493   result = (0xff0000 | (color->red & 0xff00));
1494   result <<= 8;
1495   result |= ((color->green & 0xff00) | (color->blue >> 8));
1496   return result;
1497 }
1498
1499 static void
1500 draw_rubberband (GtkWidget *widget, GdkWindow *window,
1501                  const GdkRectangle *rect, guchar alpha)
1502 {
1503         GdkGC *gc;
1504         GdkPixbuf *pixbuf;
1505         GdkColor *fill_color_gdk;
1506         guint fill_color;
1507
1508         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
1509         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
1510
1511         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
1512                                  rect->width, rect->height);
1513         gdk_pixbuf_fill (pixbuf, fill_color);
1514
1515         gdk_draw_pixbuf (window, NULL, pixbuf,
1516                          0, 0,
1517                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1518                          rect->width, rect->height,
1519                          GDK_RGB_DITHER_NONE,
1520                          0, 0);
1521
1522         g_object_unref (pixbuf);
1523
1524         gc = gdk_gc_new (window);
1525         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
1526         gdk_draw_rectangle (window, gc, FALSE,
1527                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1528                             rect->width - 1,
1529                             rect->height - 1);
1530         g_object_unref (gc);
1531
1532         gdk_color_free (fill_color_gdk);
1533 }
1534
1535
1536 static void
1537 highlight_find_results (EvView *view, int page)
1538 {
1539         EvDocumentFind *find;
1540         int i, results = 0;
1541
1542         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
1543
1544         find = EV_DOCUMENT_FIND (view->document);
1545
1546         results = ev_document_find_get_n_results (find, page);
1547
1548         for (i = 0; i < results; i++) {
1549                 EvRectangle rectangle;
1550                 GdkRectangle view_rectangle;
1551                 guchar alpha;
1552
1553                 if (i == view->find_result && page == view->find_page) {
1554                         alpha = 0x90;
1555                 } else {
1556                         alpha = 0x20;
1557                 }
1558
1559                 ev_document_find_get_result (find, page,
1560                                              i, &rectangle);
1561                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
1562                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
1563                                  &view_rectangle, alpha);
1564         }
1565 }
1566
1567 static void
1568 draw_one_page (EvView          *view,
1569                gint             page,
1570                GdkRectangle    *page_area,
1571                GtkBorder       *border,
1572                GdkRectangle    *expose_area)
1573 {
1574         gint width, height;
1575         GdkPixbuf *current_pixbuf;
1576         GdkRectangle overlap;
1577         GdkRectangle real_page_area;
1578         EvViewSelection *selection;
1579
1580         g_assert (view->document);
1581         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
1582                 return;
1583
1584         selection = find_selection_for_page (view, page);
1585         ev_page_cache_get_size (view->page_cache,
1586                                 page, view->scale,
1587                                 &width, &height);
1588         /* Render the document itself */
1589         real_page_area = *page_area;
1590
1591         real_page_area.x += border->left;
1592         real_page_area.y += border->top;
1593         real_page_area.width -= (border->left + border->right);
1594         real_page_area.height -= (border->top + border->bottom);
1595
1596         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
1597                                          GTK_WIDGET (view),
1598                                          page_area, border);
1599
1600         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
1601                 GdkPixbuf *selection_pixbuf = NULL;
1602                 GdkPixbuf *scaled_image;
1603                 GdkPixbuf *scaled_selection;
1604
1605                 current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
1606
1607                 /* Get the selection pixbuf iff we have something to draw */
1608                 if (current_pixbuf && view->selection_mode == EV_VIEW_SELECTION_TEXT && selection)
1609                         selection_pixbuf = ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
1610                                                                                  page,
1611                                                                                  view->scale);
1612
1613                 if (current_pixbuf == NULL)
1614                         scaled_image = NULL;
1615                 else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
1616                          height == gdk_pixbuf_get_height (current_pixbuf))
1617                         scaled_image = g_object_ref (current_pixbuf);
1618                 else
1619                         /* FIXME: We don't want to scale the whole area, just the right
1620                          * area of it */
1621                         scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
1622                                                                 width, height,
1623                                                                 GDK_INTERP_NEAREST);
1624
1625                 if (selection_pixbuf == NULL)
1626                         scaled_selection = NULL;
1627                 else if (width == gdk_pixbuf_get_width (selection_pixbuf) &&
1628                          height == gdk_pixbuf_get_height (selection_pixbuf))
1629                         scaled_selection = g_object_ref (selection_pixbuf);
1630                 else
1631                         /* FIXME: We don't want to scale the whole area, just the right
1632                          * area of it */
1633                         scaled_selection = gdk_pixbuf_scale_simple (selection_pixbuf,
1634                                                                     width, height,
1635                                                                     GDK_INTERP_NEAREST);
1636
1637                 if (scaled_image) {
1638                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
1639                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
1640                                          scaled_image,
1641                                          overlap.x - real_page_area.x,
1642                                          overlap.y - real_page_area.y,
1643                                          overlap.x, overlap.y,
1644                                          overlap.width, overlap.height,
1645                                          GDK_RGB_DITHER_NORMAL,
1646                                          0, 0);
1647                         g_object_unref (scaled_image);
1648                 }
1649
1650                 if (scaled_selection) {
1651                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
1652                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
1653                                          scaled_selection,
1654                                          overlap.x - real_page_area.x,
1655                                          overlap.y - real_page_area.y,
1656                                          overlap.x, overlap.y,
1657                                          overlap.width, overlap.height,
1658                                          GDK_RGB_DITHER_NORMAL,
1659                                          0, 0);
1660                         g_object_unref (scaled_selection);
1661                 }
1662         }
1663 }
1664
1665 /*** GObject functions ***/
1666
1667 static void
1668 ev_view_finalize (GObject *object)
1669 {
1670         EvView *view = EV_VIEW (object);
1671
1672         LOG ("Finalize");
1673
1674         g_free (view->status);
1675         g_free (view->find_status);
1676
1677         clear_selection (view);
1678
1679         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
1680 }
1681
1682 static void
1683 ev_view_destroy (GtkObject *object)
1684 {
1685         EvView *view = EV_VIEW (object);
1686
1687         if (view->document) {
1688                 g_object_unref (view->document);
1689                 view->document = NULL;
1690         }
1691         if (view->pixbuf_cache) {
1692                 g_object_unref (view->pixbuf_cache);
1693                 view->pixbuf_cache = NULL;
1694         }
1695         ev_view_set_scroll_adjustments (view, NULL, NULL);
1696
1697         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
1698 }
1699
1700 static void
1701 ev_view_set_property (GObject      *object,
1702                       guint         prop_id,
1703                       const GValue *value,
1704                       GParamSpec   *pspec)
1705 {
1706         EvView *view = EV_VIEW (object);
1707
1708         switch (prop_id)
1709         {
1710         case PROP_CONTINUOUS:
1711                 ev_view_set_continuous (view, g_value_get_boolean (value));
1712                 break;
1713         case PROP_DUAL_PAGE:
1714                 ev_view_set_dual_page (view, g_value_get_boolean (value));
1715                 break;
1716         case PROP_FULLSCREEN:
1717                 ev_view_set_fullscreen (view, g_value_get_boolean (value));
1718                 break;
1719         case PROP_PRESENTATION:
1720                 ev_view_set_presentation (view, g_value_get_boolean (value));
1721                 break;
1722         case PROP_SIZING_MODE:
1723                 ev_view_set_sizing_mode (view, g_value_get_enum (value));
1724                 break;
1725         case PROP_ZOOM:
1726                 ev_view_set_zoom (view, g_value_get_double (value), FALSE);
1727                 break;
1728         default:
1729                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1730         }
1731 }
1732
1733 static void
1734 ev_view_get_property (GObject *object,
1735                       guint prop_id,
1736                       GValue *value,
1737                       GParamSpec *pspec)
1738 {
1739         EvView *view = EV_VIEW (object);
1740
1741         switch (prop_id)
1742         {
1743         case PROP_STATUS:
1744                 g_value_set_string (value, view->status);
1745                 break;
1746         case PROP_FIND_STATUS:
1747                 g_value_set_string (value, view->status);
1748                 break;
1749         case PROP_CONTINUOUS:
1750                 g_value_set_boolean (value, view->continuous);
1751                 break;
1752         case PROP_DUAL_PAGE:
1753                 g_value_set_boolean (value, view->dual_page);
1754                 break;
1755         case PROP_FULLSCREEN:
1756                 g_value_set_boolean (value, view->fullscreen);
1757                 break;
1758         case PROP_PRESENTATION:
1759                 g_value_set_boolean (value, view->presentation);
1760                 break;
1761         case PROP_SIZING_MODE:
1762                 g_value_set_enum (value, view->sizing_mode);
1763                 break;
1764         case PROP_ZOOM:
1765                 g_value_set_double (value, view->scale);
1766                 break;
1767         default:
1768                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1769         }
1770 }
1771
1772 static void
1773 ev_view_class_init (EvViewClass *class)
1774 {
1775         GObjectClass *object_class = G_OBJECT_CLASS (class);
1776         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
1777         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
1778         GtkBindingSet *binding_set;
1779
1780         object_class->finalize = ev_view_finalize;
1781         object_class->set_property = ev_view_set_property;
1782         object_class->get_property = ev_view_get_property;
1783
1784         widget_class->expose_event = ev_view_expose_event;
1785         widget_class->button_press_event = ev_view_button_press_event;
1786         widget_class->motion_notify_event = ev_view_motion_notify_event;
1787         widget_class->button_release_event = ev_view_button_release_event;
1788         widget_class->size_request = ev_view_size_request;
1789         widget_class->size_allocate = ev_view_size_allocate;
1790         widget_class->realize = ev_view_realize;
1791         widget_class->unrealize = ev_view_unrealize;
1792         widget_class->scroll_event = ev_view_scroll_event;
1793         gtk_object_class->destroy = ev_view_destroy;
1794
1795         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
1796         class->binding_activated = ev_view_binding_activated;
1797
1798         widget_class->set_scroll_adjustments_signal =
1799             g_signal_new ("set-scroll-adjustments",
1800                           G_OBJECT_CLASS_TYPE (object_class),
1801                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1802                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
1803                           NULL, NULL,
1804                           ev_marshal_VOID__OBJECT_OBJECT,
1805                           G_TYPE_NONE, 2,
1806                           GTK_TYPE_ADJUSTMENT,
1807                           GTK_TYPE_ADJUSTMENT);
1808
1809         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
1810                          G_TYPE_FROM_CLASS (object_class),
1811                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1812                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
1813                          NULL, NULL,
1814                          ev_marshal_VOID__ENUM_BOOLEAN,
1815                          G_TYPE_NONE, 2,
1816                          GTK_TYPE_SCROLL_TYPE,
1817                          G_TYPE_BOOLEAN);
1818
1819         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
1820                          G_TYPE_FROM_CLASS (object_class),
1821                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1822                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
1823                          NULL, NULL,
1824                          ev_marshal_VOID__VOID,
1825                          G_TYPE_NONE, 0, G_TYPE_NONE);
1826
1827         g_object_class_install_property (object_class,
1828                                          PROP_STATUS,
1829                                          g_param_spec_string ("status",
1830                                                               "Status Message",
1831                                                               "The status message",
1832                                                               NULL,
1833                                                               G_PARAM_READABLE));
1834
1835         g_object_class_install_property (object_class,
1836                                          PROP_FIND_STATUS,
1837                                          g_param_spec_string ("find-status",
1838                                                               "Find Status Message",
1839                                                               "The find status message",
1840                                                               NULL,
1841                                                               G_PARAM_READABLE));
1842
1843         g_object_class_install_property (object_class,
1844                                          PROP_CONTINUOUS,
1845                                          g_param_spec_boolean ("continuous",
1846                                                                "Continuous",
1847                                                                "Continuous scrolling mode",
1848                                                                TRUE,
1849                                                                G_PARAM_READWRITE));
1850
1851         g_object_class_install_property (object_class,
1852                                          PROP_DUAL_PAGE,
1853                                          g_param_spec_boolean ("dual-page",
1854                                                                "Dual Page",
1855                                                                "Two pages visible at once",
1856                                                                FALSE,
1857                                                                G_PARAM_READWRITE));
1858         g_object_class_install_property (object_class,
1859                                          PROP_FULLSCREEN,
1860                                          g_param_spec_boolean ("fullscreen",
1861                                                                "Full Screen",
1862                                                                "Draw page in a fullscreen fashion",
1863                                                                FALSE,
1864                                                                G_PARAM_READWRITE));
1865         g_object_class_install_property (object_class,
1866                                          PROP_PRESENTATION,
1867                                          g_param_spec_boolean ("presentation",
1868                                                                "Presentation",
1869                                                                "Draw page in presentation mode",
1870                                                                TRUE,
1871                                                                G_PARAM_READWRITE));
1872
1873         g_object_class_install_property (object_class,
1874                                          PROP_SIZING_MODE,
1875                                          g_param_spec_enum ("sizing-mode",
1876                                                             "Sizing Mode",
1877                                                             "Sizing Mode",
1878                                                             EV_TYPE_SIZING_MODE,
1879                                                             EV_SIZING_FIT_WIDTH,
1880                                                             G_PARAM_READWRITE));
1881
1882         g_object_class_install_property (object_class,
1883                                          PROP_ZOOM,
1884                                          g_param_spec_double ("zoom",
1885                                                               "Zoom factor",
1886                                                                "Zoom factor",
1887                                                                MIN_SCALE,
1888                                                                MAX_SCALE,
1889                                                                1.0,
1890                                                                G_PARAM_READWRITE));
1891
1892         binding_set = gtk_binding_set_by_class (class);
1893
1894         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
1895         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
1896         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
1897         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
1898 }
1899
1900 static void
1901 ev_view_init (EvView *view)
1902 {
1903         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
1904
1905         view->spacing = 5;
1906         view->scale = 1.0;
1907         view->current_page = 0;
1908         view->pressed_button = -1;
1909         view->cursor = EV_VIEW_CURSOR_NORMAL;
1910         view->drag_info.in_drag = FALSE;
1911         view->selection_info.in_selection = FALSE;
1912
1913         view->selection_mode = EV_VIEW_SELECTION_TEXT;
1914         view->continuous = TRUE;
1915         view->dual_page = FALSE;
1916         view->presentation = FALSE;
1917         view->fullscreen = FALSE;
1918         view->sizing_mode = EV_SIZING_FIT_WIDTH;
1919         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1920 }
1921
1922 /*** Callbacks ***/
1923
1924 static void
1925 find_changed_cb (EvDocument *document, int page, EvView *view)
1926 {
1927         jump_to_find_page (view);
1928         jump_to_find_result (view);
1929         update_find_status_message (view);
1930
1931         if (view->current_page == page)
1932                 gtk_widget_queue_draw (GTK_WIDGET (view));
1933 }
1934
1935 static void
1936 job_finished_cb (EvPixbufCache *pixbuf_cache,
1937                  EvView        *view)
1938 {
1939         gtk_widget_queue_draw (GTK_WIDGET (view));
1940 }
1941
1942 static void
1943 page_changed_cb (EvPageCache *page_cache,
1944                  int          new_page,
1945                  EvView      *view)
1946 {
1947         if (view->current_page != new_page) {
1948
1949                 view->current_page = new_page;
1950                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
1951                 gtk_widget_queue_resize (GTK_WIDGET (view));
1952
1953                 if (EV_IS_DOCUMENT_FIND (view->document)) {
1954                         view->find_page = new_page;
1955                         view->find_result = 0;
1956                         update_find_status_message (view);
1957                 }
1958         }
1959 }
1960
1961 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
1962                                          EvView *view)
1963 {
1964         int dx = 0, dy = 0;
1965
1966         if (! GTK_WIDGET_REALIZED (view))
1967                 return;
1968
1969         if (view->hadjustment) {
1970                 dx = view->scroll_x - (int) view->hadjustment->value;
1971                 view->scroll_x = (int) view->hadjustment->value;
1972         } else {
1973                 view->scroll_x = 0;
1974         }
1975
1976         if (view->vadjustment) {
1977                 dy = view->scroll_y - (int) view->vadjustment->value;
1978                 view->scroll_y = (int) view->vadjustment->value;
1979         } else {
1980                 view->scroll_y = 0;
1981         }
1982
1983
1984         if (view->pending_resize)
1985                 gtk_widget_queue_draw (GTK_WIDGET (view));
1986         else
1987                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
1988
1989
1990         if (view->document)
1991                 view_update_range_and_current_page (view);
1992 }
1993
1994 GtkWidget*
1995 ev_view_new (void)
1996 {
1997         GtkWidget *view;
1998
1999         view = g_object_new (EV_TYPE_VIEW, NULL);
2000
2001         return view;
2002 }
2003
2004 static void
2005 setup_caches (EvView *view)
2006 {
2007         view->page_cache = ev_page_cache_get (view->document);
2008         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
2009         view->pixbuf_cache = ev_pixbuf_cache_new (view->document);
2010         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
2011 }
2012
2013 static void
2014 clear_caches (EvView *view)
2015 {
2016         if (view->pixbuf_cache) {
2017                 g_object_unref (view->pixbuf_cache);
2018                 view->pixbuf_cache = NULL;
2019         }
2020
2021         if (view->document) {
2022                 ev_page_cache_clear (view->document);
2023         }
2024 }
2025
2026 void
2027 ev_view_set_document (EvView     *view,
2028                       EvDocument *document)
2029 {
2030         g_return_if_fail (EV_IS_VIEW (view));
2031
2032         if (document != view->document) {
2033                 clear_caches (view);
2034
2035                 if (view->document) {
2036                         g_signal_handlers_disconnect_by_func (view->document,
2037                                                               find_changed_cb,
2038                                                               view);
2039                         g_object_unref (view->document);
2040                         view->page_cache = NULL;
2041
2042                 }
2043
2044                 view->document = document;
2045                 view->find_page = 0;
2046                 view->find_result = 0;
2047
2048                 if (view->document) {
2049                         g_object_ref (view->document);
2050                         if (EV_IS_DOCUMENT_FIND (view->document)) {
2051                                 g_signal_connect (view->document,
2052                                                   "find_changed",
2053                                                   G_CALLBACK (find_changed_cb),
2054                                                   view);
2055                         }
2056
2057                         setup_caches (view);
2058                 }
2059
2060                 gtk_widget_queue_resize (GTK_WIDGET (view));
2061         }
2062 }
2063
2064 /*** Zoom and sizing mode ***/
2065
2066 #define EPSILON 0.0000001
2067 void
2068 ev_view_set_zoom (EvView   *view,
2069                   double    factor,
2070                   gboolean  relative)
2071 {
2072         double scale;
2073
2074         if (relative)
2075                 scale = view->scale * factor;
2076         else
2077                 scale = factor;
2078
2079         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
2080
2081         if (ABS (view->scale - scale) < EPSILON)
2082                 return;
2083
2084         view->scale = scale;
2085         view->pending_resize = TRUE;
2086
2087         gtk_widget_queue_resize (GTK_WIDGET (view));
2088
2089         g_object_notify (G_OBJECT (view), "zoom");
2090 }
2091
2092 double
2093 ev_view_get_zoom (EvView *view)
2094 {
2095         return view->scale;
2096 }
2097
2098 void
2099 ev_view_set_continuous (EvView   *view,
2100                         gboolean  continuous)
2101 {
2102         g_return_if_fail (EV_IS_VIEW (view));
2103
2104         continuous = continuous != FALSE;
2105
2106         if (view->continuous != continuous) {
2107                 view->continuous = continuous;
2108                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2109                 gtk_widget_queue_resize (GTK_WIDGET (view));
2110         }
2111
2112         g_object_notify (G_OBJECT (view), "continuous");
2113 }
2114
2115 void
2116 ev_view_set_dual_page (EvView   *view,
2117                        gboolean  dual_page)
2118 {
2119         g_return_if_fail (EV_IS_VIEW (view));
2120
2121         dual_page = dual_page != FALSE;
2122
2123         if (view->dual_page == dual_page)
2124                 return;
2125
2126         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2127         view->dual_page = dual_page;
2128         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2129          * preload_cache_size to be 2 if dual_page is set.
2130          */
2131         gtk_widget_queue_resize (GTK_WIDGET (view));
2132
2133         g_object_notify (G_OBJECT (view), "dual-page");
2134 }
2135
2136 void
2137 ev_view_set_fullscreen (EvView   *view,
2138                          gboolean  fullscreen)
2139 {
2140         g_return_if_fail (EV_IS_VIEW (view));
2141
2142         fullscreen = fullscreen != FALSE;
2143
2144         if (view->fullscreen != fullscreen) {
2145                 view->fullscreen = fullscreen;
2146                 gtk_widget_queue_resize (GTK_WIDGET (view));
2147         }
2148
2149         g_object_notify (G_OBJECT (view), "fullscreen");
2150 }
2151
2152 gboolean
2153 ev_view_get_fullscreen (EvView *view)
2154 {
2155         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2156
2157         return view->fullscreen;
2158 }
2159
2160 void
2161 ev_view_set_presentation (EvView   *view,
2162                           gboolean  presentation)
2163 {
2164         g_return_if_fail (EV_IS_VIEW (view));
2165
2166         presentation = presentation != FALSE;
2167
2168         if (view->presentation == presentation)
2169                 return;
2170
2171         view->presentation = presentation;
2172         gtk_widget_queue_resize (GTK_WIDGET (view));
2173         if (GTK_WIDGET_REALIZED (view)) {
2174                 if (view->presentation)
2175                         gdk_window_set_background (GTK_WIDGET(view)->window,
2176                                                    &GTK_WIDGET (view)->style->black);
2177                 else
2178                         gdk_window_set_background (GTK_WIDGET(view)->window,
2179                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
2180         }
2181
2182
2183         g_object_notify (G_OBJECT (view), "presentation");
2184 }
2185
2186 gboolean
2187 ev_view_get_presentation (EvView *view)
2188 {
2189         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2190
2191         return view->presentation;
2192 }
2193
2194 void
2195 ev_view_set_sizing_mode (EvView       *view,
2196                          EvSizingMode  sizing_mode)
2197 {
2198         g_return_if_fail (EV_IS_VIEW (view));
2199
2200         if (view->sizing_mode == sizing_mode)
2201                 return;
2202
2203         view->sizing_mode = sizing_mode;
2204         gtk_widget_queue_resize (GTK_WIDGET (view));
2205
2206         g_object_notify (G_OBJECT (view), "sizing-mode");
2207 }
2208
2209 EvSizingMode
2210 ev_view_get_sizing_mode (EvView *view)
2211 {
2212         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
2213
2214         return view->sizing_mode;
2215 }
2216
2217 gboolean
2218 ev_view_can_zoom_in (EvView *view)
2219 {
2220         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
2221 }
2222
2223 gboolean
2224 ev_view_can_zoom_out (EvView *view)
2225 {
2226         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
2227 }
2228
2229 void
2230 ev_view_zoom_in (EvView *view)
2231 {
2232         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2233
2234         view->pending_scroll = SCROLL_TO_CENTER;
2235         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
2236 }
2237
2238 void
2239 ev_view_zoom_out (EvView *view)
2240 {
2241         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2242
2243         view->pending_scroll = SCROLL_TO_CENTER;
2244         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
2245 }
2246
2247 static void
2248 ev_view_set_orientation (EvView         *view,
2249                          EvOrientation   orientation)
2250 {
2251         ev_document_set_orientation (view->document, orientation);
2252
2253         clear_caches (view);
2254         setup_caches (view);
2255
2256         gtk_widget_queue_resize (GTK_WIDGET (view));
2257 }
2258
2259 void
2260 ev_view_rotate_right (EvView *view)
2261 {
2262         EvOrientation orientation, new_orientation;
2263
2264         orientation = ev_document_get_orientation (view->document);
2265         if (orientation == EV_ORIENTATION_PORTRAIT) {
2266                 new_orientation = EV_ORIENTATION_LANDSCAPE;
2267         } else if (orientation == EV_ORIENTATION_LANDSCAPE) {
2268                 new_orientation = EV_ORIENTATION_UPSIDEDOWN;
2269         } else if (orientation == EV_ORIENTATION_UPSIDEDOWN) {
2270                 new_orientation = EV_ORIENTATION_SEASCAPE;
2271         } else {
2272                 new_orientation = EV_ORIENTATION_PORTRAIT;
2273         }
2274         ev_view_set_orientation (view, new_orientation);
2275 }
2276
2277 void
2278 ev_view_rotate_left (EvView *view)
2279 {
2280         EvOrientation orientation, new_orientation;
2281
2282         orientation = ev_document_get_orientation (view->document);
2283         if (orientation == EV_ORIENTATION_PORTRAIT) {
2284                 new_orientation = EV_ORIENTATION_SEASCAPE;
2285         } else if (orientation == EV_ORIENTATION_SEASCAPE) {
2286                 new_orientation = EV_ORIENTATION_UPSIDEDOWN;
2287         } else if (orientation == EV_ORIENTATION_UPSIDEDOWN) {
2288                 new_orientation = EV_ORIENTATION_LANDSCAPE;
2289         } else {
2290                 new_orientation = EV_ORIENTATION_PORTRAIT;
2291         }
2292         ev_view_set_orientation (view, new_orientation);
2293 }
2294
2295 static double
2296 zoom_for_size_fit_width (int doc_width,
2297                          int doc_height,
2298                          int target_width,
2299                          int target_height,
2300                          int vsb_width)
2301 {
2302         double scale;
2303
2304         scale = (double)target_width / doc_width;
2305
2306         if (doc_height * scale > target_height)
2307                 scale = (double) (target_width - vsb_width) / doc_width;
2308
2309         return scale;
2310 }
2311
2312 static double
2313 zoom_for_size_best_fit (int doc_width,
2314                         int doc_height,
2315                         int target_width,
2316                         int target_height,
2317                         int vsb_width,
2318                         int hsb_width)
2319 {
2320         double w_scale;
2321         double h_scale;
2322
2323         w_scale = (double)target_width / doc_width;
2324         h_scale = (double)target_height / doc_height;
2325
2326         if (doc_height * w_scale > target_height)
2327                 w_scale = (double) (target_width - vsb_width) / doc_width;
2328         if (doc_width * h_scale > target_width)
2329                 h_scale = (double) (target_height - hsb_width) / doc_height;
2330
2331         return MIN (w_scale, h_scale);
2332 }
2333
2334
2335 static void
2336 ev_view_zoom_for_size_presentation (EvView *view,
2337                                     int     width,
2338                                     int     height)
2339 {
2340         int doc_width, doc_height;
2341         gdouble scale;
2342
2343         ev_page_cache_get_size (view->page_cache,
2344                                 view->current_page,
2345                                 1.0,
2346                                 &doc_width,
2347                                 &doc_height);
2348         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
2349         ev_view_set_zoom (view, scale, FALSE);
2350 }
2351
2352 static void
2353 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
2354                            int     width,
2355                            int     height,
2356                            int     vsb_width,
2357                            int     hsb_height)
2358 {
2359         int doc_width, doc_height;
2360         GtkBorder border;
2361         gdouble scale;
2362
2363         ev_page_cache_get_max_width (view->page_cache,
2364                                      1.0,
2365                                      &doc_width);
2366         ev_page_cache_get_max_height (view->page_cache,
2367                                       1.0,
2368                                       &doc_height);
2369         compute_border (view, doc_width, doc_height, &border);
2370
2371         doc_width = doc_width * 2;
2372         width -= (2 * (border.left + border.right) + 3 * view->spacing);
2373         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2374
2375         /* FIXME: We really need to calculate the overall height here, not the
2376          * page height.  We assume there's always a vertical scrollbar for
2377          * now.  We need to fix this. */
2378         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2379                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2380         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2381                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2382         else
2383                 g_assert_not_reached ();
2384
2385         ev_view_set_zoom (view, scale, FALSE);
2386 }
2387
2388 static void
2389 ev_view_zoom_for_size_continuous (EvView *view,
2390                                   int     width,
2391                                   int     height,
2392                                   int     vsb_width,
2393                                   int     hsb_height)
2394 {
2395         int doc_width, doc_height;
2396         GtkBorder border;
2397         gdouble scale;
2398
2399         ev_page_cache_get_max_width (view->page_cache,
2400                                      1.0,
2401                                      &doc_width);
2402         ev_page_cache_get_max_height (view->page_cache,
2403                                       1.0,
2404                                       &doc_height);
2405         compute_border (view, doc_width, doc_height, &border);
2406
2407         width -= (border.left + border.right + 2 * view->spacing);
2408         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2409
2410         /* FIXME: We really need to calculate the overall height here, not the
2411          * page height.  We assume there's always a vertical scrollbar for
2412          * now.  We need to fix this. */
2413         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2414                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2415         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2416                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2417         else
2418                 g_assert_not_reached ();
2419
2420         ev_view_set_zoom (view, scale, FALSE);
2421 }
2422
2423 static void
2424 ev_view_zoom_for_size_dual_page (EvView *view,
2425                                  int     width,
2426                                  int     height,
2427                                  int     vsb_width,
2428                                  int     hsb_height)
2429 {
2430         GtkBorder border;
2431         gint doc_width, doc_height;
2432         gdouble scale;
2433         gint other_page;
2434
2435         other_page = view->current_page ^ 1;
2436
2437         /* Find the largest of the two. */
2438         ev_page_cache_get_size (view->page_cache,
2439                                 view->current_page,
2440                                 1.0,
2441                                 &doc_width, &doc_height);
2442
2443         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
2444                 gint width_2, height_2;
2445                 ev_page_cache_get_size (view->page_cache,
2446                                         other_page,
2447                                         1.0,
2448                                         &width_2, &height_2);
2449                 if (width_2 > doc_width)
2450                         doc_width = width_2;
2451                 if (height_2 > doc_height)
2452                         doc_height = height_2;
2453         }
2454         compute_border (view, doc_width, doc_height, &border);
2455
2456         doc_width = doc_width * 2;
2457         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
2458         height -= (border.top + border.bottom + 2 * view->spacing);
2459
2460         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2461                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2462         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2463                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2464         else
2465                 g_assert_not_reached ();
2466
2467         ev_view_set_zoom (view, scale, FALSE);
2468 }
2469
2470 static void
2471 ev_view_zoom_for_size_single_page (EvView *view,
2472                                    int     width,
2473                                    int     height,
2474                                    int     vsb_width,
2475                                    int     hsb_height)
2476 {
2477         int doc_width, doc_height;
2478         GtkBorder border;
2479         gdouble scale;
2480
2481         ev_page_cache_get_size (view->page_cache,
2482                                 view->current_page,
2483                                 1.0,
2484                                 &doc_width,
2485                                 &doc_height);
2486         /* Get an approximate border */
2487         compute_border (view, width, height, &border);
2488
2489         width -= (border.left + border.right + 2 * view->spacing);
2490         height -= (border.top + border.bottom + 2 * view->spacing);
2491
2492         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2493                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2494         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2495                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2496         else
2497                 g_assert_not_reached ();
2498
2499         ev_view_set_zoom (view, scale, FALSE);
2500 }
2501
2502 void
2503 ev_view_set_zoom_for_size (EvView *view,
2504                            int     width,
2505                            int     height,
2506                            int     vsb_width,
2507                            int     hsb_height)
2508 {
2509         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2510                           view->sizing_mode == EV_SIZING_BEST_FIT);
2511         g_return_if_fail (width >= 0);
2512         g_return_if_fail (height >= 0);
2513
2514         if (view->document == NULL)
2515                 return;
2516
2517         if (view->presentation)
2518                 ev_view_zoom_for_size_presentation (view, width, height);
2519         else if (view->continuous && view->dual_page)
2520                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
2521         else if (view->continuous)
2522                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
2523         else if (view->dual_page)
2524                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
2525         else
2526                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
2527 }
2528
2529 /*** Status text messages ***/
2530
2531 const char *
2532 ev_view_get_status (EvView *view)
2533 {
2534         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2535
2536         return view->status;
2537 }
2538
2539 static void
2540 ev_view_set_status (EvView *view, const char *message)
2541 {
2542         g_return_if_fail (EV_IS_VIEW (view));
2543
2544         if (message != view->status) {
2545                 g_free (view->status);
2546                 view->status = g_strdup (message);
2547                 g_object_notify (G_OBJECT (view), "status");
2548         }
2549 }
2550
2551 static void
2552 update_find_status_message (EvView *view)
2553 {
2554         char *message;
2555
2556         if (view->current_page == view->find_page) {
2557                 int results;
2558
2559                 results = ev_document_find_get_n_results
2560                                 (EV_DOCUMENT_FIND (view->document),
2561                                  view->current_page);
2562                 /* TRANS: Sometimes this could be better translated as
2563                    "%d hit(s) on this page".  Therefore this string
2564                    contains plural cases. */
2565                 message = g_strdup_printf (ngettext ("%d found on this page",
2566                                                      "%d found on this page",
2567                                                      results),
2568                                            results);
2569         } else {
2570                 double percent;
2571
2572                 percent = ev_document_find_get_progress
2573                                 (EV_DOCUMENT_FIND (view->document));
2574                 if (percent >= (1.0 - 1e-10)) {
2575                         message = g_strdup (_("Not found"));
2576                 } else {
2577                         message = g_strdup_printf (_("%3d%% remaining to search"),
2578                                                    (int) ((1.0 - percent) * 100));
2579                 }
2580
2581         }
2582         ev_view_set_find_status (view, message);
2583         g_free (message);
2584 }
2585
2586 const char *
2587 ev_view_get_find_status (EvView *view)
2588 {
2589         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2590
2591         return view->find_status;
2592 }
2593
2594 static void
2595 ev_view_set_find_status (EvView *view, const char *message)
2596 {
2597         g_return_if_fail (EV_IS_VIEW (view));
2598
2599         g_free (view->find_status);
2600         view->find_status = g_strdup (message);
2601         g_object_notify (G_OBJECT (view), "find-status");
2602 }
2603
2604 /*** Find ***/
2605
2606 static void
2607 jump_to_find_result (EvView *view)
2608 {
2609         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2610         EvRectangle rect;
2611         GdkRectangle view_rect;
2612         int n_results;
2613         int page = view->find_page;
2614
2615         n_results = ev_document_find_get_n_results (find, page);
2616
2617         if (n_results > view->find_result) {
2618                 ev_document_find_get_result
2619                         (find, page, view->find_result, &rect);
2620
2621                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
2622                 ensure_rectangle_is_visible (view, &view_rect);
2623         }
2624 }
2625
2626 static void
2627 jump_to_find_page (EvView *view)
2628 {
2629         int n_pages, i;
2630
2631         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2632
2633         for (i = 0; i < n_pages; i++) {
2634                 int has_results;
2635                 int page;
2636
2637                 page = i + view->find_page;
2638                 if (page >= n_pages) {
2639                         page = page - n_pages;
2640                 }
2641
2642                 has_results = ev_document_find_page_has_results
2643                                 (EV_DOCUMENT_FIND (view->document), page);
2644                 if (has_results == -1) {
2645                         view->find_page = page;
2646                         break;
2647                 } else if (has_results == 1) {
2648                         ev_page_cache_set_current_page (view->page_cache, page);
2649                         jump_to_find_result (view);
2650                         break;
2651                 }
2652         }
2653 }
2654
2655 gboolean
2656 ev_view_can_find_next (EvView *view)
2657 {
2658         int n_results = 0;
2659
2660         if (EV_IS_DOCUMENT_FIND (view->document)) {
2661                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2662
2663                 n_results = ev_document_find_get_n_results (find, view->current_page);
2664         }
2665
2666         return n_results > 0;
2667 }
2668
2669 void
2670 ev_view_find_next (EvView *view)
2671 {
2672         EvPageCache *page_cache;
2673         int n_results, n_pages;
2674         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2675
2676         page_cache = ev_page_cache_get (view->document);
2677         n_results = ev_document_find_get_n_results (find, view->current_page);
2678
2679         n_pages = ev_page_cache_get_n_pages (page_cache);
2680
2681         view->find_result++;
2682
2683         if (view->find_result >= n_results) {
2684                 view->find_result = 0;
2685                 view->find_page++;
2686
2687                 if (view->find_page >= n_pages) {
2688                         view->find_page = 0;
2689                 }
2690
2691                 jump_to_find_page (view);
2692         } else {
2693                 jump_to_find_result (view);
2694                 gtk_widget_queue_draw (GTK_WIDGET (view));
2695         }
2696 }
2697
2698 void
2699 ev_view_find_previous (EvView *view)
2700 {
2701         int n_results, n_pages;
2702         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2703         EvPageCache *page_cache;
2704
2705         page_cache = ev_page_cache_get (view->document);
2706
2707         n_results = ev_document_find_get_n_results (find, view->current_page);
2708
2709         n_pages = ev_page_cache_get_n_pages (page_cache);
2710
2711         view->find_result--;
2712
2713         if (view->find_result < 0) {
2714                 view->find_result = 0;
2715                 view->find_page--;
2716
2717                 if (view->find_page < 0) {
2718                         view->find_page = n_pages - 1;
2719                 }
2720
2721                 jump_to_find_page (view);
2722         } else {
2723                 jump_to_find_result (view);
2724                 gtk_widget_queue_draw (GTK_WIDGET (view));
2725         }
2726 }
2727
2728 /*** Selections ***/
2729
2730 /* compute_new_selection_rect/text calculates the area currently selected by
2731  * view_rect.  each handles a different mode;
2732  */
2733 static GList *
2734 compute_new_selection_rect (EvView       *view,
2735                             GdkPoint     *start,
2736                             GdkPoint     *stop)
2737 {
2738         GdkRectangle view_rect;
2739         int n_pages, i;
2740         GList *list = NULL;
2741
2742         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
2743
2744         view_rect.x = MIN (start->x, stop->x);
2745         view_rect.y = MIN (start->y, stop->y);
2746         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
2747         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
2748
2749         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2750
2751         for (i = 0; i < n_pages; i++) {
2752                 GdkRectangle page_area;
2753                 GtkBorder border;
2754
2755                 if (get_page_extents (view, i, &page_area, &border)) {
2756                         GdkRectangle overlap;
2757
2758                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
2759                                 EvViewSelection *selection;
2760
2761                                 selection = g_new0 (EvViewSelection, 1);
2762                                 selection->page = i;
2763                                 view_rect_to_doc_rect (view, &overlap, &page_area,
2764                                                        &(selection->rect));
2765
2766                                 list = g_list_append (list, selection);
2767                         }
2768                 }
2769         }
2770
2771         return list;
2772 }
2773
2774 static gboolean
2775 gdk_rectangle_point_in (GdkRectangle *rectangle,
2776                         GdkPoint     *point)
2777 {
2778         return rectangle->x <= point->x &&
2779                 rectangle->y <= point->y &&
2780                 point->x < rectangle->x + rectangle->width &&
2781                 point->y < rectangle->y + rectangle->height;
2782 }
2783
2784 static GList *
2785 compute_new_selection_text (EvView   *view,
2786                             GdkPoint *start,
2787                             GdkPoint *stop)
2788 {
2789         int n_pages, i, first, last;
2790         GList *list = NULL;
2791         EvViewSelection *selection;
2792         gint width, height;
2793
2794         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
2795
2796         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2797
2798         /* First figure out the range of pages the selection
2799          * affects. */
2800         first = n_pages;
2801         last = 0;
2802         for (i = 0; i < n_pages; i++) {
2803                 GdkRectangle page_area;
2804                 GtkBorder border;
2805
2806                 get_page_extents (view, i, &page_area, &border);
2807                 if (gdk_rectangle_point_in (&page_area, start) ||
2808                     gdk_rectangle_point_in (&page_area, stop)) {
2809                         if (first == n_pages)
2810                                 first = i;
2811                         last = i;
2812                 }
2813
2814         }
2815
2816
2817
2818         /* Now create a list of EvViewSelection's for the affected
2819          * pages.  This could be an empty list, a list of just one
2820          * page or a number of pages.*/
2821         for (i = first; i < last + 1; i++) {
2822                 GdkRectangle page_area;
2823                 GtkBorder border;
2824                 GdkPoint *point;
2825
2826                 ev_page_cache_get_size (view->page_cache, i,
2827                                         1.0, &width, &height);
2828
2829                 selection = g_new0 (EvViewSelection, 1);
2830                 selection->page = i;
2831                 selection->rect.x1 = selection->rect.y1 = 0;
2832                 selection->rect.x2 = width;
2833                 selection->rect.y2 = height;
2834
2835                 get_page_extents (view, i, &page_area, &border);
2836
2837                 if (gdk_rectangle_point_in (&page_area, start))
2838                         point = start;
2839                 else
2840                         point = stop;
2841
2842                 if (i == first)
2843                         view_point_to_doc_point (view, point, &page_area,
2844                                                  &selection->rect.x1,
2845                                                  &selection->rect.y1);
2846
2847                 /* If the selection is contained within just one page,
2848                  * make sure we don't write 'start' into both points
2849                  * in selection->rect. */
2850                 if (first == last)
2851                         point = stop;
2852
2853                 if (i == last)
2854                         view_point_to_doc_point (view, point, &page_area,
2855                                                  &selection->rect.x2,
2856                                                  &selection->rect.y2);
2857
2858                 list = g_list_append (list, selection);
2859         }
2860
2861         return list;
2862 }
2863
2864 /* This function takes the newly calculated list, and figures out which regions
2865  * have changed.  It then queues a redraw approporiately.
2866  */
2867 static void
2868 merge_selection_region (EvView *view,
2869                         GList  *list)
2870 {
2871
2872         /* FIXME: actually write... */
2873         clear_selection (view);
2874         gtk_widget_queue_draw (GTK_WIDGET (view));
2875
2876         view->selection_info.selections = list;
2877         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, list);
2878 }
2879
2880 static void
2881 compute_selections (EvView   *view,
2882                     GdkPoint *start,
2883                     GdkPoint *stop)
2884 {
2885         GList *list;
2886
2887         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
2888                 list = compute_new_selection_rect (view, start, stop);
2889         else
2890                 list = compute_new_selection_text (view, start, stop);
2891         merge_selection_region (view, list);
2892 }
2893
2894 /* Free's the selection.  It's up to the caller to queue redraws if needed.
2895  */
2896 static void
2897 selection_free (EvViewSelection *selection)
2898 {
2899         g_free (selection);
2900 }
2901
2902 static void
2903 clear_selection (EvView *view)
2904 {
2905         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
2906         view->selection_info.selections = NULL;
2907         view->selection_info.in_selection = FALSE;
2908 }
2909
2910
2911 void
2912 ev_view_select_all (EvView *view)
2913 {
2914         int n_pages, i;
2915
2916         clear_selection (view);
2917
2918         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2919         for (i = 0; i < n_pages; i++) {
2920                 int width, height;
2921                 EvViewSelection *selection;
2922
2923                 ev_page_cache_get_size (view->page_cache,
2924                                         i, 1.0, &width, &height);
2925
2926                 selection = g_new0 (EvViewSelection, 1);
2927                 selection->page = i;
2928                 selection->rect.x1 = selection->rect.y1 = 0;
2929                 selection->rect.x2 = width;
2930                 selection->rect.y2 = height;
2931
2932                 view->selection_info.selections = g_list_append (view->selection_info.selections, selection);
2933         }
2934
2935         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, view->selection_info.selections);
2936         gtk_widget_queue_draw (GTK_WIDGET (view));
2937 }
2938
2939 static char *
2940 get_selected_text (EvView *ev_view)
2941 {
2942         GString *text;
2943         GList *l;
2944
2945         text = g_string_new (NULL);
2946
2947         ev_document_doc_mutex_lock ();
2948
2949         for (l = ev_view->selection_info.selections; l != NULL; l = l->next) {
2950                 EvViewSelection *selection = (EvViewSelection *)l->data;
2951                 char *tmp;
2952
2953                 tmp = ev_document_get_text (ev_view->document,
2954                                             selection->page,
2955                                             &selection->rect);
2956                 g_string_append (text, tmp);
2957                 g_free (tmp);
2958         }
2959
2960         ev_document_doc_mutex_unlock ();
2961
2962         return g_string_free (text, FALSE);
2963 }
2964
2965 void
2966 ev_view_copy (EvView *ev_view)
2967 {
2968         GtkClipboard *clipboard;
2969         char *text;
2970
2971         if (!ev_document_can_get_text (ev_view->document)) {
2972                 return;
2973         }
2974
2975         text = get_selected_text (ev_view);
2976         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
2977                                               GDK_SELECTION_CLIPBOARD);
2978         gtk_clipboard_set_text (clipboard, text, -1);
2979         g_free (text);
2980 }
2981
2982 static void
2983 ev_view_primary_get_cb (GtkClipboard     *clipboard,
2984                         GtkSelectionData *selection_data,
2985                         guint             info,
2986                         gpointer          data)
2987 {
2988         EvView *ev_view = EV_VIEW (data);
2989         char *text;
2990
2991         if (!ev_document_can_get_text (ev_view->document)) {
2992                 return;
2993         }
2994
2995         text = get_selected_text (ev_view);
2996         gtk_selection_data_set_text (selection_data, text, -1);
2997         g_free (text);
2998 }
2999
3000 static void
3001 ev_view_primary_clear_cb (GtkClipboard *clipboard,
3002                           gpointer      data)
3003 {
3004         EvView *view = EV_VIEW (data);
3005
3006         clear_selection (view);
3007 }
3008
3009 static void
3010 ev_view_update_primary_selection (EvView *ev_view)
3011 {
3012         GtkClipboard *clipboard;
3013
3014         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3015                                               GDK_SELECTION_PRIMARY);
3016
3017         if (ev_view->selection_info.selections) {
3018                 if (!gtk_clipboard_set_with_owner (clipboard,
3019                                                    targets,
3020                                                    G_N_ELEMENTS (targets),
3021                                                    ev_view_primary_get_cb,
3022                                                    ev_view_primary_clear_cb,
3023                                                    G_OBJECT (ev_view)))
3024                         ev_view_primary_clear_cb (clipboard, ev_view);
3025         } else {
3026                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
3027                         gtk_clipboard_clear (clipboard);
3028         }
3029 }
3030
3031 /*** Cursor operations ***/
3032
3033 static GdkCursor *
3034 ev_view_create_invisible_cursor(void)
3035 {
3036        GdkBitmap *empty;
3037        GdkColor black = { 0, 0, 0, 0 };
3038        static char bits[] = { 0x00 };
3039
3040        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
3041
3042        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
3043 }
3044
3045 static void
3046 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
3047 {
3048         GdkCursor *cursor = NULL;
3049         GdkDisplay *display;
3050         GtkWidget *widget;
3051
3052         if (view->cursor == new_cursor) {
3053                 return;
3054         }
3055
3056         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
3057         display = gtk_widget_get_display (widget);
3058         view->cursor = new_cursor;
3059
3060         switch (new_cursor) {
3061                 case EV_VIEW_CURSOR_NORMAL:
3062                         gdk_window_set_cursor (widget->window, NULL);
3063                         break;
3064                 case EV_VIEW_CURSOR_IBEAM:
3065                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
3066                         break;
3067                 case EV_VIEW_CURSOR_LINK:
3068                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
3069                         break;
3070                 case EV_VIEW_CURSOR_WAIT:
3071                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
3072                         break;
3073                 case EV_VIEW_CURSOR_HIDDEN:
3074                         cursor = ev_view_create_invisible_cursor ();
3075                         break;
3076                 case EV_VIEW_CURSOR_DRAG:
3077                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
3078                         break;
3079         }
3080
3081         if (cursor) {
3082                 gdk_window_set_cursor (widget->window, cursor);
3083                 gdk_cursor_unref (cursor);
3084                 gdk_flush();
3085         }
3086 }
3087
3088 void
3089 ev_view_hide_cursor (EvView *view)
3090 {
3091        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
3092 }
3093
3094 void
3095 ev_view_show_cursor (EvView *view)
3096 {
3097        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3098 }
3099
3100 /*** Enum description for usage in signal ***/
3101
3102 GType
3103 ev_sizing_mode_get_type (void)
3104 {
3105   static GType etype = 0;
3106   if (etype == 0) {
3107     static const GEnumValue values[] = {
3108       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
3109       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
3110       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
3111       { 0, NULL, NULL }
3112     };
3113     etype = g_enum_register_static ("EvSizingMode", values);
3114   }
3115   return etype;
3116 }
3117