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 <string.h>
  23 #include <gtk/gtkalignment.h>
  24 #include <glib/gi18n.h>
  25 #include <gtk/gtkbindings.h>
  26 #include <gtk/gtkselection.h>
  27 #include <gtk/gtkclipboard.h>
  28 #include <gdk/gdkkeysyms.h>
  29 #include <libgnomevfs/gnome-vfs-utils.h>
  30
  31 #include "ev-marshal.h"
  32 #include "ev-view.h"
  33 #include "ev-view-private.h"
  34 #include "ev-utils.h"
  35 #include "ev-selection.h"
  36 #include "ev-document-find.h"
  37 #include "ev-document-misc.h"
  38 #include "ev-debug.h"
  39 #include "ev-job-queue.h"
  40 #include "ev-page-cache.h"
  41 #include "ev-pixbuf-cache.h"
  42 #include "ev-tooltip.h"
  43
  44 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  45 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  46 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  47
  48
  49 enum {
  50         PROP_0,
  51         PROP_STATUS,
  52         PROP_FIND_STATUS,
  53         PROP_CONTINUOUS,
  54         PROP_DUAL_PAGE,
  55         PROP_FULLSCREEN,
  56         PROP_PRESENTATION,
  57         PROP_SIZING_MODE,
  58         PROP_ZOOM,
  59         PROP_ROTATION,
  60         PROP_HAS_SELECTION,
  61 };
  62
  63 enum {
  64         SIGNAL_BINDING_ACTIVATED,
  65         SIGNAL_ZOOM_INVALID,
  66         SIGNAL_EXTERNAL_LINK,
  67         SIGNAL_POPUP_MENU,
  68         N_SIGNALS,
  69 };
  70
  71 enum {
  72         TARGET_STRING,
  73         TARGET_TEXT,
  74         TARGET_COMPOUND_TEXT,
  75         TARGET_UTF8_STRING,
  76         TARGET_TEXT_BUFFER_CONTENTS
  77 };
  78
  79 static const GtkTargetEntry targets[] = {
  80         { "STRING", 0, TARGET_STRING },
  81         { "TEXT",   0, TARGET_TEXT },
  82         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  83         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  84 };
  85
  86 static guint signals[N_SIGNALS];
  87
  88 typedef enum {
  89         EV_VIEW_FIND_NEXT,
  90         EV_VIEW_FIND_PREV
  91 } EvViewFindDirection;
  92
  93 #define ZOOM_IN_FACTOR  1.2
  94 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  95
  96 #define MIN_SCALE 0.05409
  97 #define MAX_SCALE 4.0
  98
  99 #define SCROLL_TIME 150
 100
 101 /*** Scrolling ***/
 102 static void       scroll_to_current_page                     (EvView *view,
 103                                                               GtkOrientation orientation);
 104 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 105                                                               GtkAdjustment      *hadjustment,
 106                                                               GtkAdjustment      *vadjustment);
 107 static void       view_update_range_and_current_page         (EvView             *view);
 108 static void       set_scroll_adjustment                      (EvView             *view,
 109                                                               GtkOrientation      orientation,
 110                                                               GtkAdjustment      *adjustment);
 111 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 112                                                               GtkAdjustment      *hadjustment,
 113                                                               GtkAdjustment      *vadjustment);
 114 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 115                                                               guint               keyval,
 116                                                               GtkScrollType       scroll,
 117                                                               gboolean            horizontal);
 118 static void       ev_view_binding_activated                  (EvView             *view,
 119                                                               GtkScrollType       scroll,
 120                                                               gboolean            horizontal);
 121 static void       ensure_rectangle_is_visible                (EvView             *view,
 122                                                               GdkRectangle       *rect);
 123
 124 /*** Geometry computations ***/
 125 static void       compute_border                             (EvView             *view,
 126                                                               int                 width,
 127                                                               int                 height,
 128                                                               GtkBorder          *border);
 129 static void       get_page_y_offset                          (EvView *view,
 130                                                               int page,
 131                                                               double zoom,
 132                                                               int *y_offset);
 133 static gboolean   get_page_extents                           (EvView             *view,
 134                                                               gint                page,
 135                                                               GdkRectangle       *page_area,
 136                                                               GtkBorder          *border);
 137 static void       view_rect_to_doc_rect                      (EvView             *view,
 138                                                               GdkRectangle       *view_rect,
 139                                                               GdkRectangle       *page_area,
 140                                                               EvRectangle        *doc_rect);
 141 static void       doc_rect_to_view_rect                      (EvView             *view,
 142                                                               int                 page,
 143                                                               EvRectangle        *doc_rect,
 144                                                               GdkRectangle       *view_rect);
 145 static void       find_page_at_location                      (EvView             *view,
 146                                                               gdouble             x,
 147                                                               gdouble             y,
 148                                                               gint               *page,
 149                                                               gint               *x_offset,
 150                                                               gint               *y_offset);
 151 static gboolean  doc_point_to_view_point                     (EvView       *view,
 152                                                               int           page,
 153                                                               EvPoint      *doc_point,
 154                                                               GdkPoint     *view_point);
 155 /*** Hyperrefs ***/
 156 static EvLink *   ev_view_get_link_at_location               (EvView  *view,
 157                                                               gdouble  x,
 158                                                               gdouble  y);
 159 static char*      tip_from_link                              (EvView             *view,
 160                                                               EvLink             *link);
 161 static void       handle_link_over_xy                        (EvView *view,
 162                                                               gint x,
 163                                                               gint y);
 164 /*** GtkWidget implementation ***/
 165 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 166                                                               GtkRequisition     *requisition);
 167 static void       ev_view_size_request_continuous            (EvView             *view,
 168                                                               GtkRequisition     *requisition);
 169 static void       ev_view_size_request_dual_page             (EvView             *view,
 170                                                               GtkRequisition     *requisition);
 171 static void       ev_view_size_request_single_page           (EvView             *view,
 172                                                               GtkRequisition     *requisition);
 173 static void       ev_view_size_request                       (GtkWidget          *widget,
 174                                                               GtkRequisition     *requisition);
 175 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 176                                                               GtkAllocation      *allocation);
 177 static void       ev_view_realize                            (GtkWidget          *widget);
 178 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 179                                                               GdkEventScroll     *event);
 180 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 181                                                               GdkEventExpose     *event);
 182 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 183 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 184                                                               GdkEventButton     *event);
 185 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 186                                                               GdkEventMotion     *event);
 187 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 188                                                               GdkEventButton     *event);
 189 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 190                                                               GdkEventCrossing   *event);
 191 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 192                                                               GdkEventCrossing   *event);
 193 static void       ev_view_style_set                          (GtkWidget          *widget,
 194                                                               GtkStyle           *old_style);
 195
 196 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 197
 198 /*** Drawing ***/
 199 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 200 static void       draw_rubberband                            (GtkWidget          *widget,
 201                                                               GdkWindow          *window,
 202                                                               const GdkRectangle *rect,
 203                                                               guchar              alpha);
 204 static void       highlight_find_results                     (EvView             *view,
 205                                                               int                 page);
 206 static void       draw_one_page                              (EvView             *view,
 207                                                               gint                page,
 208                                                               GdkRectangle       *page_area,
 209                                                               GtkBorder          *border,
 210                                                               GdkRectangle       *expose_area);
 211
 212 /*** Callbacks ***/
 213 static void       find_changed_cb                            (EvDocument         *document,
 214                                                               int                 page,
 215                                                               EvView             *view);
 216 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 217                                                               EvView             *view);
 218 static void       page_changed_cb                            (EvPageCache        *page_cache,
 219                                                               int                 new_page,
 220                                                               EvView             *view);
 221 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 222                                                               EvView             *view);
 223
 224 /*** GObject ***/
 225 static void       ev_view_finalize                           (GObject            *object);
 226 static void       ev_view_destroy                            (GtkObject          *object);
 227 static void       ev_view_set_property                       (GObject            *object,
 228                                                               guint               prop_id,
 229                                                               const GValue       *value,
 230                                                               GParamSpec         *pspec);
 231 static void       ev_view_get_property                       (GObject            *object,
 232                                                               guint               prop_id,
 233                                                               GValue             *value,
 234                                                               GParamSpec         *pspec);
 235 static void       ev_view_class_init                         (EvViewClass        *class);
 236 static void       ev_view_init                               (EvView             *view);
 237
 238 /*** Zoom and sizing ***/
 239 static double   zoom_for_size_fit_width                      (int doc_width,
 240                                                               int doc_height,
 241                                                               int target_width,
 242                                                               int target_height,
 243                                                               int vsb_width);
 244 static double   zoom_for_size_fit_height                     (int doc_width,
 245                                                               int doc_height,
 246                                                               int target_width,
 247                                                               int target_height,
 248                                                               int vsb_height);
 249 static double   zoom_for_size_best_fit                       (int doc_width,
 250                                                               int doc_height,
 251                                                               int target_width,
 252                                                               int target_height,
 253                                                               int vsb_width,
 254                                                               int hsb_width);
 255 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 256                                                               int     width,
 257                                                               int     height);
 258 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 259                                                                 int     width,
 260                                                                 int     height,
 261                                                                 int     vsb_width,
 262                                                                 int     hsb_height);
 263 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 264                                                                 int     width,
 265                                                                 int     height,
 266                                                                 int     vsb_width,
 267                                                                 int     hsb_height);
 268 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 269                                                                 int     width,
 270                                                                 int     height,
 271                                                                 int     vsb_width,
 272                                                                 int     hsb_height);
 273 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 274                                                                 int     width,
 275                                                                 int     height,
 276                                                                 int     vsb_width,
 277                                                                 int     hsb_height);
 278 /*** Cursors ***/
 279 static GdkCursor* ev_view_create_invisible_cursor            (void);
 280 static void       ev_view_set_cursor                         (EvView             *view,
 281                                                               EvViewCursor        new_cursor);
 282
 283 /*** Status messages ***/
 284 static void       ev_view_set_status                         (EvView             *view,
 285                                                               const char         *message);
 286 static void       update_find_status_message                 (EvView             *view);
 287 static void       ev_view_set_find_status                    (EvView             *view,
 288                                                               const char         *message);
 289 /*** Find ***/
 290 static void       jump_to_find_result                        (EvView             *view);
 291 static void       jump_to_find_page                          (EvView             *view,
 292                                                               EvViewFindDirection direction);
 293
 294 /*** Selection ***/
 295 static void       compute_selections                         (EvView             *view,
 296                                                               GdkPoint           *start,
 297                                                               GdkPoint           *stop);
 298 static void       clear_selection                            (EvView             *view);
 299 static void       selection_free                             (EvViewSelection    *selection);
 300 static char*      get_selected_text                          (EvView             *ev_view);
 301 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 302                                                               GtkSelectionData   *selection_data,
 303                                                               guint               info,
 304                                                               gpointer            data);
 305 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 306                                                               gpointer            data);
 307 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 308
 309
 310 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 311
 312 static void
 313 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 314 {
 315         GdkPoint view_point;
 316
 317         if (view->document == NULL) {
 318                 return;
 319         }
 320
 321         doc_point_to_view_point (view, view->current_page, &view->pending_point, &view_point);
 322
 323         if (orientation == GTK_ORIENTATION_VERTICAL) {
 324                 view->pending_point.y = 0;
 325         } else {
 326                 view->pending_point.x = 0;
 327         }
 328
 329         if (orientation == GTK_ORIENTATION_VERTICAL) {
 330                 if (view->continuous) {
 331                         gtk_adjustment_clamp_page (view->vadjustment,
 332                                                    view_point.y - view->spacing / 2,
 333                                                    view_point.y + view->vadjustment->page_size);
 334                 } else {
 335                         gtk_adjustment_set_value (view->vadjustment,
 336                                                   view_point.y);
 337                 }
 338         } else {
 339                 if (view->dual_page) {
 340                         gtk_adjustment_clamp_page (view->hadjustment,
 341                                                    view_point.x,
 342                                                    view_point.x + view->hadjustment->page_size);
 343                 } else {
 344                         gtk_adjustment_set_value (view->hadjustment,
 345                                                   CLAMP (view_point.x,
 346                                                   view->hadjustment->lower,
 347                                                   view->hadjustment->upper -
 348                                                   view->hadjustment->page_size));
 349                 }
 350         }
 351 }
 352
 353 static void
 354 view_set_adjustment_values (EvView         *view,
 355                             GtkOrientation  orientation)
 356 {
 357         GtkWidget *widget = GTK_WIDGET (view);
 358         GtkAdjustment *adjustment;
 359         int requisition;
 360         int allocation;
 361
 362         double factor;
 363         gint new_value;
 364
 365         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 366                 requisition = widget->requisition.width;
 367                 allocation = widget->allocation.width;
 368                 adjustment = view->hadjustment;
 369         } else {
 370                 requisition = widget->requisition.height;
 371                 allocation = widget->allocation.height;
 372                 adjustment = view->vadjustment;
 373         }
 374
 375         if (!adjustment)
 376                 return;
 377
 378         factor = 1.0;
 379         switch (view->pending_scroll) {
 380                 case SCROLL_TO_KEEP_POSITION:
 381                         factor = (adjustment->value) / adjustment->upper;
 382                         break;
 383                 case SCROLL_TO_PAGE_POSITION:
 384                         break;
 385                 case SCROLL_TO_CENTER:
 386                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 387                         break;
 388         }
 389
 390         adjustment->page_size = allocation;
 391         adjustment->step_increment = allocation * 0.1;
 392         adjustment->page_increment = allocation * 0.9;
 393         adjustment->lower = 0;
 394         adjustment->upper = MAX (allocation, requisition);
 395
 396         /*
 397          * We add 0.5 to the values before to average out our rounding errors.
 398          */
 399         switch (view->pending_scroll) {
 400                 case SCROLL_TO_KEEP_POSITION:
 401                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 402                         gtk_adjustment_set_value (adjustment, (int)new_value);
 403                         break;
 404                 case SCROLL_TO_PAGE_POSITION:
 405                         scroll_to_current_page (view, orientation);
 406                         break;
 407                 case SCROLL_TO_CENTER:
 408                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 409                                            0, adjustment->upper - adjustment->page_size);
 410                         gtk_adjustment_set_value (adjustment, (int)new_value);
 411                         break;
 412         }
 413
 414         gtk_adjustment_changed (adjustment);
 415 }
 416
 417 static void
 418 view_update_range_and_current_page (EvView *view)
 419 {
 420         if (view->pending_scroll != SCROLL_TO_KEEP_POSITION)
 421                 return;
 422
 423         /* Presentation trumps all other modes */
 424         if (view->presentation) {
 425                 view->start_page = view->current_page;
 426                 view->end_page = view->current_page;
 427         } else if (view->continuous) {
 428                 GdkRectangle current_area, unused, page_area;
 429                 GtkBorder border;
 430                 gint current_page;
 431                 gboolean found = FALSE;
 432                 int i;
 433
 434                 if (!(view->vadjustment && view->hadjustment))
 435                         return;
 436
 437                 current_area.x = view->hadjustment->value;
 438                 current_area.width = view->hadjustment->upper;
 439                 current_area.y = view->vadjustment->value;
 440                 current_area.height = view->vadjustment->page_size;
 441
 442                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 443
 444                         get_page_extents (view, i, &page_area, &border);
 445
 446                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 447                                 if (! found) {
 448                                         view->start_page = i;
 449                                         found = TRUE;
 450
 451                                 }
 452                                 view->end_page = i;
 453                         } else if (found) {
 454                                 break;
 455                         }
 456                 }
 457
 458                 current_page = ev_page_cache_get_current_page (view->page_cache);
 459
 460                 if (current_page < view->start_page || current_page > view->end_page) {
 461                         view->current_page = view->start_page;
 462                         ev_page_cache_set_current_page (view->page_cache, view->start_page);
 463                 }
 464         } else {
 465                 if (view->dual_page) {
 466                         if (view->current_page % 2 == 0) {
 467                                 view->start_page = view->current_page;
 468                                 if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 469                                         view->end_page = view->start_page + 1;
 470                                 else
 471                                         view->end_page = view->start_page;
 472                         } else {
 473                                 view->start_page = view->current_page - 1;
 474                                 view->end_page = view->current_page;
 475                         }
 476                 } else {
 477                         view->start_page = view->current_page;
 478                         view->end_page = view->current_page;
 479                 }
 480         }
 481
 482         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 483                                         view->start_page,
 484                                         view->end_page,
 485                                         view->rotation,
 486                                         view->scale,
 487                                         view->selection_info.selections);
 488 }
 489
 490 static void
 491 set_scroll_adjustment (EvView *view,
 492                        GtkOrientation  orientation,
 493                        GtkAdjustment  *adjustment)
 494 {
 495         GtkAdjustment **to_set;
 496
 497         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 498                 to_set = &view->hadjustment;
 499         else
 500                 to_set = &view->vadjustment;
 501
 502         if (*to_set != adjustment) {
 503                 if (*to_set) {
 504                         g_signal_handlers_disconnect_by_func (*to_set,
 505                                                               (gpointer) on_adjustment_value_changed,
 506                                                               view);
 507                         g_object_unref (*to_set);
 508                 }
 509
 510                 *to_set = adjustment;
 511                 view_set_adjustment_values (view, orientation);
 512
 513                 if (*to_set) {
 514                         g_object_ref (*to_set);
 515                         g_signal_connect (*to_set, "value_changed",
 516                                           G_CALLBACK (on_adjustment_value_changed), view);
 517                 }
 518         }
 519 }
 520
 521 static void
 522 ev_view_set_scroll_adjustments (EvView *view,
 523                                 GtkAdjustment  *hadjustment,
 524                                 GtkAdjustment  *vadjustment)
 525 {
 526         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 527         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 528
 529         on_adjustment_value_changed (NULL, view);
 530 }
 531
 532 static void
 533 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 534                            guint           keyval,
 535                            GtkScrollType   scroll,
 536                            gboolean        horizontal)
 537 {
 538   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 539
 540   gtk_binding_entry_add_signal (binding_set, keyval, 0,
 541                                 "binding_activated", 2,
 542                                 GTK_TYPE_SCROLL_TYPE, scroll,
 543                                 G_TYPE_BOOLEAN, horizontal);
 544   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
 545                                 "binding_activated", 2,
 546                                 GTK_TYPE_SCROLL_TYPE, scroll,
 547                                 G_TYPE_BOOLEAN, horizontal);
 548 }
 549
 550 void
 551 ev_view_scroll (EvView        *view,
 552                 EvScrollType   scroll)
 553 {
 554         GtkAdjustment *adjustment;
 555         double value, increment;
 556         gboolean first_page = FALSE;
 557         gboolean last_page = FALSE;
 558
 559         /* Assign values for increment and vertical adjustment */
 560         adjustment = view->vadjustment;
 561         increment = adjustment->page_size * 0.75;
 562         value = adjustment->value;
 563
 564         /* Assign boolean for first and last page */
 565         if (view->current_page == 0)
 566                 first_page = TRUE;
 567         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 568                 last_page = TRUE;
 569
 570         switch (scroll) {
 571                 case EV_SCROLL_PAGE_BACKWARD:
 572                         /* Do not jump backwards if at the first page */
 573                         if (value == (adjustment->lower) && first_page) {
 574                                 /* Do nothing */
 575                                 /* At the top of a page, assign the upper bound limit of previous page */
 576                         } else if (value == (adjustment->lower)) {
 577                                 value = adjustment->upper - adjustment->page_size;
 578                                 ev_page_cache_set_current_page (view->page_cache, view->current_page - 1);
 579                                 /* Jump to the top */
 580                         } else {
 581                                 value = MAX (value - increment, adjustment->lower);
 582                         }
 583                         break;
 584                 case EV_SCROLL_PAGE_FORWARD:
 585                         /* Do not jump forward if at the last page */
 586                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 587                                 /* Do nothing */
 588                         /* At the bottom of a page, assign the lower bound limit of next page */
 589                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 590                                 value = 0;
 591                                 ev_page_cache_set_current_page (view->page_cache, view->current_page + 1);
 592                         /* Jump to the bottom */
 593                         } else {
 594                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 595                         }
 596                         break;
 597                 default:
 598                         break;
 599         }
 600
 601         gtk_adjustment_set_value (adjustment, value);
 602 }
 603
 604 static void
 605 ev_view_binding_activated (EvView *view,
 606                            GtkScrollType scroll,
 607                            gboolean horizontal)
 608 {
 609         GtkAdjustment *adjustment;
 610         double value;
 611
 612         if (view->presentation) {
 613                 switch (scroll) {
 614                         case GTK_SCROLL_STEP_BACKWARD:
 615                                 ev_view_previous_page (view);
 616                                 break;
 617                         case GTK_SCROLL_STEP_FORWARD:
 618                                 ev_view_next_page (view);
 619                                 break;
 620                         default:
 621                                 break;
 622                 }
 623                 return;
 624         }
 625
 626         if (horizontal) {
 627                 adjustment = view->hadjustment;
 628         } else {
 629                 adjustment = view->vadjustment;
 630         }
 631
 632         value = adjustment->value;
 633
 634         switch (scroll) {
 635                 case GTK_SCROLL_STEP_BACKWARD:
 636                         value -= adjustment->step_increment;
 637                         break;
 638                 case GTK_SCROLL_STEP_FORWARD:
 639                         value += adjustment->step_increment;
 640                         break;
 641                 default:
 642                         break;
 643         }
 644
 645         value = CLAMP (value, adjustment->lower,
 646                        adjustment->upper - adjustment->page_size);
 647
 648         gtk_adjustment_set_value (adjustment, value);
 649 }
 650
 651 #define MARGIN 5
 652
 653 static void
 654 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 655 {
 656         GtkWidget *widget = GTK_WIDGET (view);
 657         GtkAdjustment *adjustment;
 658         int value;
 659
 660         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
 661
 662         adjustment = view->vadjustment;
 663
 664         if (rect->y < adjustment->value) {
 665                 value = MAX (adjustment->lower, rect->y - MARGIN);
 666                 gtk_adjustment_set_value (view->vadjustment, value);
 667         } else if (rect->y + rect->height >
 668                    adjustment->value + widget->allocation.height) {
 669                 value = MIN (adjustment->upper, rect->y + rect->height -
 670                              widget->allocation.height + MARGIN);
 671                 gtk_adjustment_set_value (view->vadjustment, value);
 672         }
 673
 674         adjustment = view->hadjustment;
 675
 676         if (rect->x < adjustment->value) {
 677                 value = MAX (adjustment->lower, rect->x - MARGIN);
 678                 gtk_adjustment_set_value (view->hadjustment, value);
 679         } else if (rect->x + rect->height >
 680                    adjustment->value + widget->allocation.width) {
 681                 value = MIN (adjustment->upper, rect->x + rect->width -
 682                              widget->allocation.width + MARGIN);
 683                 gtk_adjustment_set_value (view->hadjustment, value);
 684         }
 685 }
 686
 687 /*** Geometry computations ***/
 688
 689 static void
 690 compute_border (EvView *view, int width, int height, GtkBorder *border)
 691 {
 692         if (view->presentation) {
 693                 border->left = 0;
 694                 border->right = 0;
 695                 border->top = 0;
 696                 border->bottom = 0;
 697         } else {
 698                 ev_document_misc_get_page_border_size (width, height, border);
 699         }
 700 }
 701
 702 static void
 703 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 704 {
 705         int max_width, offset;
 706         GtkBorder border;
 707
 708         g_return_if_fail (y_offset != NULL);
 709
 710         ev_page_cache_get_max_width (view->page_cache, view->rotation, zoom, &max_width);
 711
 712         compute_border (view, max_width, max_width, &border);
 713
 714         if (view->dual_page) {
 715                 ev_page_cache_get_height_to_page (view->page_cache, page,
 716                                                   view->rotation, zoom, NULL, &offset);
 717                 offset += (page / 2 + 1) * view->spacing + (page / 2) * (border.top + border.bottom);
 718         } else {
 719                 ev_page_cache_get_height_to_page (view->page_cache, page,
 720                                                   view->rotation, zoom, &offset, NULL);
 721                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 722         }
 723
 724         *y_offset = offset;
 725         return;
 726 }
 727
 728 static gboolean
 729 get_page_extents (EvView       *view,
 730                   gint          page,
 731                   GdkRectangle *page_area,
 732                   GtkBorder    *border)
 733 {
 734         GtkWidget *widget;
 735         int width, height;
 736
 737         widget = GTK_WIDGET (view);
 738
 739         /* Get the size of the page */
 740         ev_page_cache_get_size (view->page_cache, page,
 741                                 view->rotation,
 742                                 view->scale,
 743                                 &width, &height);
 744         compute_border (view, width, height, border);
 745         page_area->width = width + border->left + border->right;
 746         page_area->height = height + border->top + border->bottom;
 747
 748         if (view->presentation) {
 749                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 750                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 751         } else if (view->continuous) {
 752                 gint max_width;
 753                 gint x, y;
 754
 755                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 756                                              view->scale, &max_width);
 757                 max_width = max_width + border->left + border->right;
 758                 /* Get the location of the bounding box */
 759                 if (view->dual_page) {
 760                         x = view->spacing + (page % 2) * (max_width + view->spacing);
 761                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 762                         if (page % 2 == 0)
 763                                 x = x + (max_width - width - border->left - border->right);
 764                 } else {
 765                         x = view->spacing;
 766                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 767                 }
 768
 769                 get_page_y_offset (view, page, view->scale, &y);
 770
 771                 page_area->x = x;
 772                 page_area->y = y;
 773         } else {
 774                 gint x, y;
 775                 if (view->dual_page) {
 776                         gint width_2, height_2;
 777                         gint max_width = width;
 778                         gint max_height = height;
 779                         GtkBorder overall_border;
 780                         gint other_page;
 781
 782                         other_page = page ^ 1;
 783
 784                         /* First, we get the bounding box of the two pages */
 785                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
 786                                 ev_page_cache_get_size (view->page_cache,
 787                                                         other_page,
 788                                                         view->rotation,
 789                                                         view->scale,
 790                                                         &width_2, &height_2);
 791                                 if (width_2 > width)
 792                                         max_width = width_2;
 793                                 if (height_2 > height)
 794                                         max_height = height_2;
 795                         }
 796                         compute_border (view, max_width, max_height, &overall_border);
 797
 798                         /* Find the offsets */
 799                         x = view->spacing;
 800                         y = view->spacing;
 801
 802                         /* Adjust for being the left or right page */
 803                         if (page % 2 == 0)
 804                                 x = x + max_width - width;
 805                         else
 806                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 807
 808                         y = y + (max_height - height)/2;
 809
 810                         /* Adjust for extra allocation */
 811                         x = x + MAX (0, widget->allocation.width -
 812                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 813                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 814                 } else {
 815                         x = view->spacing;
 816                         y = view->spacing;
 817
 818                         /* Adjust for extra allocation */
 819                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 820                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 821                 }
 822
 823                 page_area->x = x;
 824                 page_area->y = y;
 825         }
 826
 827         return TRUE;
 828 }
 829
 830 static void
 831 view_point_to_doc_point (EvView *view,
 832                          GdkPoint *view_point,
 833                          GdkRectangle *page_area,
 834                          double  *doc_point_x,
 835                          double  *doc_point_y)
 836 {
 837         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 838         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 839 }
 840
 841 static void
 842 view_rect_to_doc_rect (EvView *view,
 843                        GdkRectangle *view_rect,
 844                        GdkRectangle *page_area,
 845                        EvRectangle  *doc_rect)
 846 {
 847         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 848         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 849         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 850         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 851 }
 852
 853 static gboolean
 854 doc_point_to_view_point (EvView       *view,
 855                          int           page,
 856                          EvPoint      *doc_point,
 857                          GdkPoint     *view_point)
 858 {
 859         GdkRectangle page_area;
 860         GtkBorder border;
 861         double x, y, view_x, view_y;
 862         int width, height;
 863
 864         ev_page_cache_get_size (view->page_cache, page,
 865                                 view->rotation,
 866                                 1.0,
 867                                 &width, &height);
 868
 869         if (view->rotation == 0) {
 870                 x = doc_point->x;
 871                 y = doc_point->y;
 872         } else if (view->rotation == 90) {
 873                 x = width - doc_point->y;
 874                 y = doc_point->x;
 875         } else if (view->rotation == 180) {
 876                 x = width - doc_point->x;
 877                 y = height - doc_point->y;
 878         } else if (view->rotation == 270) {
 879                 x = doc_point->y;
 880                 y = height - doc_point->x;
 881         } else {
 882                 g_assert_not_reached ();
 883         }
 884
 885         get_page_extents (view, page, &page_area, &border);
 886
 887         view_x = x * view->scale;
 888         view_y = y * view->scale;
 889         view_point->x = view_x + page_area.x;
 890         view_point->y = view_y + page_area.y;
 891
 892         return (view_x > 0 && view_x <= page_area.width &&
 893                 view_y > 0 && view_y <= page_area.height);
 894 }
 895
 896 static void
 897 doc_rect_to_view_rect (EvView       *view,
 898                        int           page,
 899                        EvRectangle  *doc_rect,
 900                        GdkRectangle *view_rect)
 901 {
 902         GdkRectangle page_area;
 903         GtkBorder border;
 904         double x, y, w, h;
 905         int width, height;
 906
 907         ev_page_cache_get_size (view->page_cache, page,
 908                                 view->rotation,
 909                                 1.0,
 910                                 &width, &height);
 911
 912         if (view->rotation == 0) {
 913                 x = doc_rect->x1;
 914                 y = doc_rect->y1;
 915                 w = doc_rect->x2 - doc_rect->x1;
 916                 h = doc_rect->y2 - doc_rect->y1;
 917         } else if (view->rotation == 90) {
 918                 x = width - doc_rect->y2;
 919                 y = doc_rect->x1;
 920                 w = doc_rect->y2 - doc_rect->y1;
 921                 h = doc_rect->x2 - doc_rect->x1;
 922         } else if (view->rotation == 180) {
 923                 x = width - doc_rect->x2;
 924                 y = height - doc_rect->y2;
 925                 w = doc_rect->x2 - doc_rect->x1;
 926                 h = doc_rect->y2 - doc_rect->y1;
 927         } else if (view->rotation == 270) {
 928                 x = doc_rect->y1;
 929                 y = height - doc_rect->x2;
 930                 w = doc_rect->y2 - doc_rect->y1;
 931                 h = doc_rect->x2 - doc_rect->x1;
 932         } else {
 933                 g_assert_not_reached ();
 934         }
 935
 936         get_page_extents (view, page, &page_area, &border);
 937
 938         view_rect->x = x * view->scale + page_area.x;
 939         view_rect->y = y * view->scale + page_area.y;
 940         view_rect->width = w * view->scale;
 941         view_rect->height = h * view->scale;
 942 }
 943
 944 static void
 945 find_page_at_location (EvView  *view,
 946                        gdouble  x,
 947                        gdouble  y,
 948                        gint    *page,
 949                        gint    *x_offset,
 950                        gint    *y_offset)
 951 {
 952         int i;
 953
 954         if (view->document == NULL)
 955                 return;
 956
 957         g_assert (page);
 958         g_assert (x_offset);
 959         g_assert (y_offset);
 960
 961         for (i = view->start_page; i <= view->end_page; i++) {
 962                 GdkRectangle page_area;
 963                 GtkBorder border;
 964
 965                 if (! get_page_extents (view, i, &page_area, &border))
 966                         continue;
 967
 968                 if ((x >= page_area.x + border.left) &&
 969                     (x < page_area.x + page_area.width - border.right) &&
 970                     (y >= page_area.y + border.top) &&
 971                     (y < page_area.y + page_area.height - border.bottom)) {
 972                         *page = i;
 973                         *x_offset = x - (page_area.x + border.left);
 974                         *y_offset = y - (page_area.y + border.top);
 975                         return;
 976                 }
 977         }
 978
 979         *page = -1;
 980 }
 981
 982 static gboolean
 983 location_in_text (EvView  *view,
 984                   gdouble  x,
 985                   gdouble  y)
 986 {
 987         GdkRegion *region;
 988         gint page = -1;
 989         gint x_offset = 0, y_offset = 0;
 990
 991         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
 992
 993         if (page == -1)
 994                 return FALSE;
 995
 996         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
 997
 998         if (region)
 999                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1000         else
1001                 return FALSE;
1002 }
1003
1004 static int
1005 ev_view_get_width (EvView *view)
1006 {
1007         return GTK_WIDGET (view)->allocation.width;
1008 }
1009
1010 static int
1011 ev_view_get_height (EvView *view)
1012 {
1013         return GTK_WIDGET (view)->allocation.height;
1014 }
1015
1016 static gboolean
1017 location_in_selected_text (EvView  *view,
1018                            gdouble  x,
1019                            gdouble  y)
1020 {
1021         gint page = -1;
1022         gint x_offset = 0, y_offset = 0;
1023         EvViewSelection *selection;
1024         GList *l = NULL;
1025
1026         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1027                 selection = (EvViewSelection *)l->data;
1028
1029                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1030
1031                 if (page != selection->page)
1032                         continue;
1033
1034                 if (selection->covered_region &&
1035                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1036                         return TRUE;
1037         }
1038
1039         return FALSE;
1040 }
1041
1042 /*** Hyperref ***/
1043 static EvLink *
1044 ev_view_get_link_at_location (EvView  *view,
1045                               gdouble  x,
1046                               gdouble  y)
1047 {
1048         gint page = -1;
1049         gint x_offset = 0, y_offset = 0;
1050         GList *link_mapping;
1051
1052         x += view->scroll_x;
1053         y += view->scroll_y;
1054
1055         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1056
1057         if (page == -1)
1058                 return NULL;
1059
1060         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1061
1062         if (link_mapping)
1063                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
1064         else
1065                 return NULL;
1066 }
1067
1068 static void
1069 goto_fitr_link (EvView *view, EvLink *link)
1070 {
1071         EvPoint doc_point;
1072         int page;
1073         double zoom;
1074
1075         zoom = zoom_for_size_best_fit (ev_link_get_right (link) - ev_link_get_left (link),
1076                                        ev_link_get_top (link) - ev_link_get_bottom (link),
1077                                        ev_view_get_width (view),
1078                                        ev_view_get_height (view), 0, 0);
1079
1080         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1081         ev_view_set_zoom (view, zoom, FALSE);
1082
1083         page = ev_link_get_page (link);
1084         doc_point.x = ev_link_get_left (link);
1085         doc_point.y = ev_link_get_top (link);
1086
1087         view->current_page = page;
1088         view->pending_point = doc_point;
1089         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1090
1091         gtk_widget_queue_resize (GTK_WIDGET (view));
1092 }
1093
1094 static void
1095 goto_fitv_link (EvView *view, EvLink *link)
1096 {
1097         EvPoint doc_point;
1098         int doc_width, doc_height, page;
1099         double zoom;
1100
1101         page = ev_link_get_page (link);
1102         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1103
1104         doc_point.x = ev_link_get_left (link);
1105         doc_point.y = 0;
1106
1107         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1108                                          ev_view_get_width (view),
1109                                          ev_view_get_height (view), 0);
1110
1111         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1112         ev_view_set_zoom (view, zoom, FALSE);
1113
1114         view->current_page = page;
1115         view->pending_point = doc_point;
1116         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1117
1118         gtk_widget_queue_resize (GTK_WIDGET (view));
1119 }
1120
1121 static void
1122 goto_fith_link (EvView *view, EvLink *link)
1123 {
1124         EvPoint doc_point;
1125         int doc_width, doc_height, page;
1126         double zoom;
1127
1128         page = ev_link_get_page (link);
1129         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1130
1131         doc_point.x = 0;
1132         doc_point.y = doc_height - ev_link_get_top (link);
1133
1134         zoom = zoom_for_size_fit_width (doc_width, ev_link_get_top (link),
1135                                         ev_view_get_width (view),
1136                                         ev_view_get_height (view), 0);
1137
1138         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1139         ev_view_set_zoom (view, zoom, FALSE);
1140
1141         view->current_page = page;
1142         view->pending_point = doc_point;
1143         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1144
1145         gtk_widget_queue_resize (GTK_WIDGET (view));
1146 }
1147
1148 static void
1149 goto_fit_link (EvView *view, EvLink *link)
1150 {
1151         double zoom;
1152         int doc_width, doc_height;
1153         int page;
1154
1155         page = ev_link_get_page (link);
1156         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1157
1158         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1159                                        ev_view_get_height (view), 0, 0);
1160
1161         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1162         ev_view_set_zoom (view, zoom, FALSE);
1163
1164         view->current_page = page;
1165         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1166
1167         gtk_widget_queue_resize (GTK_WIDGET (view));
1168 }
1169
1170 static void
1171 goto_xyz_link (EvView *view, EvLink *link)
1172 {
1173         EvPoint doc_point;
1174         int height, page;
1175         double zoom;
1176
1177         zoom = ev_link_get_zoom (link);
1178         page = ev_link_get_page (link);
1179         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, NULL, &height);
1180
1181         if (zoom != 0) {
1182                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1183                 ev_view_set_zoom (view, zoom, FALSE);
1184         }
1185
1186         doc_point.x = ev_link_get_left (link);
1187         doc_point.y = height - ev_link_get_top (link);
1188
1189         view->current_page = page;
1190         view->pending_point = doc_point;
1191         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1192
1193         gtk_widget_queue_resize (GTK_WIDGET (view));
1194 }
1195
1196 void
1197 ev_view_goto_link (EvView *view, EvLink *link)
1198 {
1199         EvLinkType type;
1200         int page;
1201
1202         type = ev_link_get_link_type (link);
1203
1204         switch (type) {
1205                 case EV_LINK_TYPE_TITLE:
1206                         break;
1207                 case EV_LINK_TYPE_PAGE:
1208                         page = ev_link_get_page (link);
1209                         ev_page_cache_set_current_page (view->page_cache, page);
1210                         break;
1211                 case EV_LINK_TYPE_PAGE_FIT:
1212                         goto_fit_link (view, link);
1213                         break;
1214                 case EV_LINK_TYPE_PAGE_FITH:
1215                         goto_fith_link (view, link);
1216                         break;
1217                 case EV_LINK_TYPE_PAGE_FITV:
1218                         goto_fitv_link (view, link);
1219                         break;
1220                 case EV_LINK_TYPE_PAGE_FITR:
1221                         goto_fitr_link (view, link);
1222                         break;
1223                 case EV_LINK_TYPE_PAGE_XYZ:
1224                         goto_xyz_link (view, link);
1225                         break;
1226                 case EV_LINK_TYPE_EXTERNAL_URI:
1227                 case EV_LINK_TYPE_LAUNCH:
1228                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, link);
1229                         break;
1230         }
1231 }
1232
1233 static char *
1234 tip_from_link (EvView *view, EvLink *link)
1235 {
1236         EvLinkType type;
1237         char *msg = NULL;
1238         char *page_label;
1239
1240         type = ev_link_get_link_type (link);
1241
1242         switch (type) {
1243                 case EV_LINK_TYPE_TITLE:
1244                         if (ev_link_get_title (link))
1245                                 msg = g_strdup (ev_link_get_title (link));
1246                         break;
1247                 case EV_LINK_TYPE_PAGE:
1248                 case EV_LINK_TYPE_PAGE_XYZ:
1249                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
1250                         msg = g_strdup_printf (_("Go to page %s"), page_label);
1251                         g_free (page_label);
1252                         break;
1253                 case EV_LINK_TYPE_EXTERNAL_URI:
1254                         msg = g_strdup (ev_link_get_uri (link));
1255                         break;
1256                 default:
1257                         break;
1258         }
1259
1260         return msg;
1261 }
1262
1263 static void
1264 handle_link_over_xy (EvView *view, gint x, gint y)
1265 {
1266         EvLink *link;
1267
1268         link = ev_view_get_link_at_location (view, x, y);
1269
1270         if (view->link_tooltip == NULL) {
1271                 view->link_tooltip = ev_tooltip_new (GTK_WIDGET (view));
1272         }
1273
1274         if (view->hovered_link != link) {
1275                 view->hovered_link = link;
1276                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
1277         }
1278
1279         if (link) {
1280                 char *msg = tip_from_link (view, link);
1281
1282                 if (msg && g_utf8_validate (msg, -1, NULL)) {
1283                         EvTooltip *tooltip = EV_TOOLTIP (view->link_tooltip);
1284
1285                         ev_tooltip_set_position (tooltip, x, y);
1286                         ev_tooltip_set_text (tooltip, msg);
1287                         ev_tooltip_activate (tooltip);
1288                 }
1289                 g_free (msg);
1290
1291                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1292         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1293                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1294         } else {
1295                 ev_view_set_status (view, NULL);
1296                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1297                     view->cursor == EV_VIEW_CURSOR_IBEAM)
1298                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1299         }
1300         return;
1301 }
1302
1303 /*** GtkWidget implementation ***/
1304
1305 static void
1306 ev_view_size_request_continuous_dual_page (EvView         *view,
1307                                            GtkRequisition *requisition)
1308 {
1309         int max_width;
1310         gint n_pages;
1311         GtkBorder border;
1312
1313         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1314                                      view->scale, &max_width);
1315         compute_border (view, max_width, max_width, &border);
1316
1317         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
1318
1319         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
1320         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1321
1322         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1323                 requisition->width = 1;
1324         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1325                 requisition->width = 1;
1326                 /* FIXME: This could actually be set on one page docs or docs
1327                  * with a strange aspect ratio. */
1328                 /* requisition->height = 1;*/
1329         }
1330 }
1331
1332 static void
1333 ev_view_size_request_continuous (EvView         *view,
1334                                  GtkRequisition *requisition)
1335 {
1336         int max_width;
1337         int n_pages;
1338         GtkBorder border;
1339
1340
1341         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1342                                      view->scale, &max_width);
1343         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1344         compute_border (view, max_width, max_width, &border);
1345
1346         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
1347         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1348
1349         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1350                 requisition->width = 1;
1351         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1352                 requisition->width = 1;
1353                 /* FIXME: This could actually be set on one page docs or docs
1354                  * with a strange aspect ratio. */
1355                 /* requisition->height = 1;*/
1356         }
1357 }
1358
1359 static void
1360 ev_view_size_request_dual_page (EvView         *view,
1361                                 GtkRequisition *requisition)
1362 {
1363         GtkBorder border;
1364         gint width, height;
1365
1366         /* Find the largest of the two. */
1367         ev_page_cache_get_size (view->page_cache,
1368                                 view->current_page,
1369                                 view->rotation,
1370                                 view->scale,
1371                                 &width, &height);
1372         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1373                 gint width_2, height_2;
1374                 ev_page_cache_get_size (view->page_cache,
1375                                         view->current_page + 1,
1376                                         view->rotation,
1377                                         view->scale,
1378                                         &width_2, &height_2);
1379                 if (width_2 > width) {
1380                         width = width_2;
1381                         height = height_2;
1382                 }
1383         }
1384         compute_border (view, width, height, &border);
1385
1386         requisition->width = ((width + border.left + border.right) * 2) +
1387                 (view->spacing * 3);
1388         requisition->height = (height + border.top + border.bottom) +
1389                 (view->spacing * 2);
1390
1391         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1392                 requisition->width = 1;
1393         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1394                 requisition->width = 1;
1395                 requisition->height = 1;
1396         }
1397 }
1398
1399 static void
1400 ev_view_size_request_single_page (EvView         *view,
1401                                   GtkRequisition *requisition)
1402 {
1403         GtkBorder border;
1404         gint width, height;
1405
1406         ev_page_cache_get_size (view->page_cache,
1407                                 view->current_page,
1408                                 view->rotation,
1409                                 view->scale,
1410                                 &width, &height);
1411         compute_border (view, width, height, &border);
1412
1413         requisition->width = width + border.left + border.right + (2 * view->spacing);
1414         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1415
1416         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1417                 requisition->width = 1;
1418                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1419         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1420                 requisition->width = 1;
1421                 requisition->height = 1;
1422         }
1423 }
1424
1425 static void
1426 ev_view_size_request (GtkWidget      *widget,
1427                       GtkRequisition *requisition)
1428 {
1429         EvView *view = EV_VIEW (widget);
1430
1431         if (view->document == NULL) {
1432                 requisition->width = 1;
1433                 requisition->height = 1;
1434                 return;
1435         }
1436
1437         if (view->presentation) {
1438                 requisition->width = 1;
1439                 requisition->height = 1;
1440                 return;
1441         }
1442
1443         if (view->continuous && view->dual_page)
1444                 ev_view_size_request_continuous_dual_page (view, requisition);
1445         else if (view->continuous)
1446                 ev_view_size_request_continuous (view, requisition);
1447         else if (view->dual_page)
1448                 ev_view_size_request_dual_page (view, requisition);
1449         else
1450                 ev_view_size_request_single_page (view, requisition);
1451 }
1452
1453 static void
1454 ev_view_size_allocate (GtkWidget      *widget,
1455                        GtkAllocation  *allocation)
1456 {
1457         EvView *view = EV_VIEW (widget);
1458
1459         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1460             view->sizing_mode == EV_SIZING_BEST_FIT) {
1461
1462                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1463
1464                 ev_view_size_request (widget, &widget->requisition);
1465         }
1466
1467         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1468         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1469
1470         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1471         view->pending_resize = FALSE;
1472
1473         if (view->document)
1474                 view_update_range_and_current_page (view);
1475
1476         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1477 }
1478
1479 static void
1480 ev_view_realize (GtkWidget *widget)
1481 {
1482         EvView *view = EV_VIEW (widget);
1483         GdkWindowAttr attributes;
1484
1485         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1486
1487
1488         attributes.window_type = GDK_WINDOW_CHILD;
1489         attributes.wclass = GDK_INPUT_OUTPUT;
1490         attributes.visual = gtk_widget_get_visual (widget);
1491         attributes.colormap = gtk_widget_get_colormap (widget);
1492
1493         attributes.x = widget->allocation.x;
1494         attributes.y = widget->allocation.y;
1495         attributes.width = widget->allocation.width;
1496         attributes.height = widget->allocation.height;
1497         attributes.event_mask = GDK_EXPOSURE_MASK |
1498                                 GDK_BUTTON_PRESS_MASK |
1499                                 GDK_BUTTON_RELEASE_MASK |
1500                                 GDK_SCROLL_MASK |
1501                                 GDK_KEY_PRESS_MASK |
1502                                 GDK_POINTER_MOTION_MASK |
1503                                 GDK_POINTER_MOTION_HINT_MASK |
1504                                 GDK_ENTER_NOTIFY_MASK |
1505                                 GDK_LEAVE_NOTIFY_MASK;
1506
1507         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1508                                          &attributes,
1509                                          GDK_WA_X | GDK_WA_Y |
1510                                          GDK_WA_COLORMAP |
1511                                          GDK_WA_VISUAL);
1512         gdk_window_set_user_data (widget->window, widget);
1513         widget->style = gtk_style_attach (widget->style, widget->window);
1514
1515         if (view->presentation)
1516                 gdk_window_set_background (widget->window, &widget->style->black);
1517         else
1518                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1519 }
1520
1521 static gboolean
1522 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1523 {
1524         EvView *view = EV_VIEW (widget);
1525         guint state;
1526
1527         state = event->state & gtk_accelerator_get_default_mod_mask ();
1528
1529         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
1530                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1531
1532                 if (event->direction == GDK_SCROLL_UP ||
1533                     event->direction == GDK_SCROLL_LEFT) {
1534                         if (ev_view_can_zoom_in (view)) {
1535                                 ev_view_zoom_in (view);
1536                         }
1537                 } else {
1538                         if (ev_view_can_zoom_out (view)) {
1539                                 ev_view_zoom_out (view);
1540                         }
1541                 }
1542
1543                 return TRUE;
1544         }
1545
1546         /* Shift+Wheel scrolls the in the perpendicular direction */
1547         if (state & GDK_SHIFT_MASK) {
1548                 if (event->direction == GDK_SCROLL_UP)
1549                         event->direction = GDK_SCROLL_LEFT;
1550                 if (event->direction == GDK_SCROLL_LEFT)
1551                         event->direction = GDK_SCROLL_UP;
1552                 if (event->direction == GDK_SCROLL_DOWN)
1553                         event->direction = GDK_SCROLL_RIGHT;
1554                 if (event->direction == GDK_SCROLL_RIGHT)
1555                         event->direction = GDK_SCROLL_DOWN;
1556
1557                 event->state &= ~GDK_SHIFT_MASK;
1558                 state &= ~GDK_SHIFT_MASK;
1559         }
1560
1561         if (state == 0 && view->presentation) {
1562                 switch (event->direction) {
1563                 case GDK_SCROLL_DOWN:
1564                 case GDK_SCROLL_RIGHT:
1565                         ev_view_next_page (view);
1566                         break;
1567                 case GDK_SCROLL_UP:
1568                 case GDK_SCROLL_LEFT:
1569                         ev_view_previous_page (view);
1570                         break;
1571                 }
1572
1573                 return TRUE;
1574         }
1575
1576         return FALSE;
1577 }
1578
1579 static EvViewSelection *
1580 find_selection_for_page (EvView *view,
1581                          gint    page)
1582 {
1583         GList *list;
1584
1585         for (list = view->selection_info.selections; list != NULL; list = list->next) {
1586                 EvViewSelection *selection;
1587
1588                 selection = (EvViewSelection *) list->data;
1589
1590                 if (selection->page == page)
1591                         return selection;
1592         }
1593
1594         return NULL;
1595 }
1596
1597 static gboolean
1598 ev_view_expose_event (GtkWidget      *widget,
1599                       GdkEventExpose *event)
1600 {
1601         EvView *view = EV_VIEW (widget);
1602         int i;
1603
1604         if (view->document == NULL)
1605                 return FALSE;
1606
1607         for (i = view->start_page; i <= view->end_page; i++) {
1608                 GdkRectangle page_area;
1609                 GtkBorder border;
1610
1611                 if (!get_page_extents (view, i, &page_area, &border))
1612                         continue;
1613
1614                 page_area.x -= view->scroll_x;
1615                 page_area.y -= view->scroll_y;
1616
1617                 draw_one_page (view, i, &page_area, &border, &(event->area));
1618
1619                 if (EV_IS_DOCUMENT_FIND (view->document))
1620                         highlight_find_results (view, i);
1621         }
1622
1623         return FALSE;
1624 }
1625
1626 static gboolean
1627 ev_view_popup_menu (GtkWidget *widget)
1628 {
1629     gint x, y;
1630     EvLink *link;
1631     EvView *view = EV_VIEW (widget);
1632
1633     gtk_widget_get_pointer (widget, &x, &y);
1634     link = ev_view_get_link_at_location (view, x, y);
1635     g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
1636     return TRUE;
1637 }
1638
1639 static gboolean
1640 ev_view_button_press_event (GtkWidget      *widget,
1641                             GdkEventButton *event)
1642 {
1643         EvView *view = EV_VIEW (widget);
1644         EvLink *link;
1645
1646         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1647                 gtk_widget_grab_focus (widget);
1648         }
1649
1650         view->pressed_button = event->button;
1651         view->selection_info.in_drag = FALSE;
1652
1653         switch (event->button) {
1654                 case 1:
1655                         if (view->selection_info.selections) {
1656                                 if (location_in_selected_text (view,
1657                                                                event->x + view->scroll_x,
1658                                                                event->y + view->scroll_y)) {
1659                                         view->selection_info.in_drag = TRUE;
1660                                 } else {
1661                                         clear_selection (view);
1662                                 }
1663
1664                                 gtk_widget_queue_draw (widget);
1665                         }
1666
1667                         view->selection_info.start.x = event->x + view->scroll_x;
1668                         view->selection_info.start.y = event->y + view->scroll_y;
1669
1670                         return TRUE;
1671                 case 2:
1672                         /* use root coordinates as reference point because
1673                          * scrolling changes window relative coordinates */
1674                         view->drag_info.start.x = event->x_root;
1675                         view->drag_info.start.y = event->y_root;
1676                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1677                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1678
1679                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1680
1681                         return TRUE;
1682                 case 3:
1683                         link = ev_view_get_link_at_location (view, event->x, event->y);
1684                         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
1685                         return TRUE;
1686         }
1687
1688         return FALSE;
1689 }
1690
1691 static void
1692 ev_view_drag_data_get (GtkWidget        *widget,
1693                        GdkDragContext   *context,
1694                        GtkSelectionData *selection_data,
1695                        guint             info,
1696                        guint             time)
1697 {
1698         EvView *view = EV_VIEW (widget);
1699
1700         if (view->selection_info.selections &&
1701             ev_document_can_get_text (view->document)) {
1702                 gchar *text;
1703
1704                 text = get_selected_text (view);
1705
1706                 gtk_selection_data_set_text (selection_data, text, strlen (text));
1707
1708                 g_free (text);
1709         }
1710 }
1711
1712 static gboolean
1713 selection_update_idle_cb (EvView *view)
1714 {
1715         compute_selections (view, &view->selection_info.start, &view->motion);
1716         view->selection_update_id = 0;
1717         return FALSE;
1718 }
1719
1720 static gboolean
1721 selection_scroll_timeout_cb (EvView *view)
1722 {
1723         gint x, y, shift = 0;
1724         GtkWidget *widget = GTK_WIDGET (view);
1725
1726         gtk_widget_get_pointer (widget, &x, &y);
1727
1728         if (y > widget->allocation.height) {
1729                 shift = (y - widget->allocation.height) / 2;
1730         } else if (y < 0) {
1731                 shift = y / 2;
1732         }
1733
1734         if (shift)
1735                 gtk_adjustment_set_value (view->vadjustment,
1736                                           CLAMP (view->vadjustment->value + shift,
1737                                           view->vadjustment->lower,
1738                                           view->vadjustment->upper -
1739                                           view->vadjustment->page_size));
1740
1741         if (x > widget->allocation.width) {
1742                 shift = (x - widget->allocation.width) / 2;
1743         } else if (x < 0) {
1744                 shift = x / 2;
1745         }
1746
1747         if (shift)
1748                 gtk_adjustment_set_value (view->hadjustment,
1749                                           CLAMP (view->hadjustment->value + shift,
1750                                           view->hadjustment->lower,
1751                                           view->hadjustment->upper -
1752                                           view->hadjustment->page_size));
1753
1754         return TRUE;
1755 }
1756
1757 static gboolean
1758 ev_view_motion_notify_event (GtkWidget      *widget,
1759                              GdkEventMotion *event)
1760 {
1761         EvView *view = EV_VIEW (widget);
1762         gint x, y;
1763
1764         if (!view->document)
1765                 return FALSE;
1766
1767         if (event->is_hint || event->window != widget->window) {
1768             gtk_widget_get_pointer (widget, &x, &y);
1769         } else {
1770             x = event->x;
1771             y = event->y;
1772         }
1773
1774         if (view->selection_info.in_drag) {
1775                 if (gtk_drag_check_threshold (widget,
1776                                               view->selection_info.start.x,
1777                                               view->selection_info.start.y,
1778                                               x, y)) {
1779                         GdkDragContext *context;
1780                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
1781
1782                         gtk_target_list_add_text_targets (target_list, 0);
1783
1784                         context = gtk_drag_begin (widget, target_list,
1785                                                   GDK_ACTION_COPY,
1786                                                   1, (GdkEvent *)event);
1787
1788                         view->selection_info.in_drag = FALSE;
1789
1790                         gtk_target_list_unref (target_list);
1791
1792                         return TRUE;
1793                 }
1794         }
1795
1796         /* For the Evince 0.4.x release, we limit selection to un-rotated
1797          * documents only.
1798          */
1799         if (view->pressed_button == 1 && view->rotation == 0) {
1800
1801                 /* Schedule timeout to scroll during selection and additionally
1802                  * scroll once to allow arbitrary speed. */
1803                 if (!view->selection_scroll_id)
1804                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME, (GSourceFunc)selection_scroll_timeout_cb, view);
1805                 else
1806                     selection_scroll_timeout_cb (view);
1807
1808                 view->selection_info.in_selection = TRUE;
1809                 view->motion.x = x + view->scroll_x;
1810                 view->motion.y = y + view->scroll_y;
1811
1812                 /* Queue an idle to handle the motion.  We do this because
1813                  * handling any selection events in the motion could be slower
1814                  * than new motion events reach us.  We always put it in the
1815                  * idle to make sure we catch up and don't visibly lag the
1816                  * mouse. */
1817                 if (!view->selection_update_id)
1818                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
1819
1820                 return TRUE;
1821         } else if (view->pressed_button == 2) {
1822                 if (!view->drag_info.in_drag) {
1823                         gboolean start;
1824
1825                         start = gtk_drag_check_threshold (widget,
1826                                                           view->drag_info.start.x,
1827                                                           view->drag_info.start.y,
1828                                                           event->x_root,
1829                                                           event->y_root);
1830                         view->drag_info.in_drag = start;
1831                 }
1832
1833                 if (view->drag_info.in_drag) {
1834                         int dx, dy;
1835                         gdouble dhadj_value, dvadj_value;
1836
1837                         dx = event->x_root - view->drag_info.start.x;
1838                         dy = event->y_root - view->drag_info.start.y;
1839
1840                         dhadj_value = view->hadjustment->page_size *
1841                                       (gdouble)dx / widget->allocation.width;
1842                         dvadj_value = view->vadjustment->page_size *
1843                                       (gdouble)dy / widget->allocation.height;
1844
1845                         /* clamp scrolling to visible area */
1846                         gtk_adjustment_set_value (view->hadjustment,
1847                                                   MIN(view->drag_info.hadj - dhadj_value,
1848                                                       view->hadjustment->upper -
1849                                                       view->hadjustment->page_size));
1850                         gtk_adjustment_set_value (view->vadjustment,
1851                                                   MIN(view->drag_info.vadj - dvadj_value,
1852                                                       view->vadjustment->upper -
1853                                                       view->vadjustment->page_size));
1854
1855                         return TRUE;
1856                 }
1857         /* For the Evince 0.4.x release, we limit links to un-rotated documents
1858          * only.
1859          */
1860         } else if (view->pressed_button <= 0 &&
1861                    view->rotation == 0) {
1862                 handle_link_over_xy (view, x, y);
1863                 return TRUE;
1864         }
1865
1866         return FALSE;
1867 }
1868
1869 static gboolean
1870 ev_view_button_release_event (GtkWidget      *widget,
1871                               GdkEventButton *event)
1872 {
1873         EvView *view = EV_VIEW (widget);
1874         EvLink *link;
1875
1876         if (view->pressed_button == 2) {
1877                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1878         }
1879
1880         if (view->document) {
1881                 link = ev_view_get_link_at_location (view, event->x, event->y);
1882         } else {
1883                 link = NULL;
1884         }
1885
1886         view->pressed_button = -1;
1887         view->drag_info.in_drag = FALSE;
1888
1889         if (view->selection_scroll_id) {
1890             g_source_remove (view->selection_scroll_id);
1891             view->selection_scroll_id = 0;
1892         }
1893         if (view->selection_update_id) {
1894             g_source_remove (view->selection_update_id);
1895             view->selection_update_id = 0;
1896         }
1897
1898         if (view->selection_info.selections) {
1899                 ev_view_update_primary_selection (view);
1900
1901                 if (view->selection_info.in_drag) {
1902                         clear_selection (view);
1903                         gtk_widget_queue_draw (widget);
1904                 }
1905
1906                 view->selection_info.in_drag = FALSE;
1907         } else if (link) {
1908                 ev_view_goto_link (view, link);
1909         } else if (view->presentation) {
1910                 switch (event->button) {
1911                 case 1:
1912                         ev_view_next_page (view);
1913                         return TRUE;
1914                 case 3:
1915                         ev_view_previous_page (view);
1916                         return TRUE;
1917                 }
1918         }
1919
1920         return FALSE;
1921 }
1922
1923 static gint
1924 ev_view_focus_in (GtkWidget     *widget,
1925                   GdkEventFocus *event)
1926 {
1927         if (EV_VIEW (widget)->pixbuf_cache)
1928                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
1929         gtk_widget_queue_draw (widget);
1930
1931         return FALSE;
1932 }
1933
1934 static gint
1935 ev_view_focus_out (GtkWidget     *widget,
1936                      GdkEventFocus *event)
1937 {
1938         if (EV_VIEW (widget)->pixbuf_cache)
1939                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
1940         gtk_widget_queue_draw (widget);
1941
1942         return FALSE;
1943 }
1944
1945 static gboolean
1946 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
1947 {
1948         EvView *view = EV_VIEW (widget);
1949
1950         ev_view_set_status (view, NULL);
1951
1952         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1953             view->cursor == EV_VIEW_CURSOR_IBEAM)
1954                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1955
1956         if (view->link_tooltip) {
1957                 view->hovered_link = NULL;
1958                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
1959         }
1960
1961         return FALSE;
1962 }
1963
1964 static gboolean
1965 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
1966 {
1967         EvView *view = EV_VIEW (widget);
1968
1969         handle_link_over_xy (view, event->x, event->y);
1970
1971         return FALSE;
1972 }
1973
1974 static void
1975 ev_view_style_set (GtkWidget *widget,
1976                    GtkStyle  *old_style)
1977 {
1978         if (EV_VIEW (widget)->pixbuf_cache)
1979                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
1980
1981         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
1982 }
1983
1984 /*** Drawing ***/
1985
1986 static guint32
1987 ev_gdk_color_to_rgb (const GdkColor *color)
1988 {
1989   guint32 result;
1990   result = (0xff0000 | (color->red & 0xff00));
1991   result <<= 8;
1992   result |= ((color->green & 0xff00) | (color->blue >> 8));
1993   return result;
1994 }
1995
1996 static void
1997 draw_rubberband (GtkWidget *widget, GdkWindow *window,
1998                  const GdkRectangle *rect, guchar alpha)
1999 {
2000         GdkGC *gc;
2001         GdkPixbuf *pixbuf;
2002         GdkColor *fill_color_gdk;
2003         guint fill_color;
2004
2005         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
2006         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
2007
2008         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
2009                                  rect->width, rect->height);
2010         gdk_pixbuf_fill (pixbuf, fill_color);
2011
2012         gdk_draw_pixbuf (window, NULL, pixbuf,
2013                          0, 0,
2014                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
2015                          rect->width, rect->height,
2016                          GDK_RGB_DITHER_NONE,
2017                          0, 0);
2018
2019         g_object_unref (pixbuf);
2020
2021         gc = gdk_gc_new (window);
2022         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
2023         gdk_draw_rectangle (window, gc, FALSE,
2024                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
2025                             rect->width - 1,
2026                             rect->height - 1);
2027         g_object_unref (gc);
2028
2029         gdk_color_free (fill_color_gdk);
2030 }
2031
2032
2033 static void
2034 highlight_find_results (EvView *view, int page)
2035 {
2036         EvDocumentFind *find;
2037         int i, results = 0;
2038
2039         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
2040
2041         find = EV_DOCUMENT_FIND (view->document);
2042
2043         results = ev_document_find_get_n_results (find, page);
2044
2045         for (i = 0; i < results; i++) {
2046                 EvRectangle rectangle;
2047                 GdkRectangle view_rectangle;
2048                 guchar alpha;
2049
2050                 if (i == view->find_result && page == view->find_page) {
2051                         alpha = 0x90;
2052                 } else {
2053                         alpha = 0x20;
2054                 }
2055
2056                 ev_document_find_get_result (find, page, i, &rectangle);
2057                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
2058                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
2059                                  &view_rectangle, alpha);
2060         }
2061 }
2062
2063 static void
2064 draw_loading_text (EvView       *view,
2065                    GdkRectangle *page_area,
2066                    GdkRectangle *expose_area)
2067 {
2068         PangoLayout *layout;
2069         PangoFontDescription *font_desc;
2070         PangoRectangle logical_rect;
2071         double real_scale;
2072         int target_width;
2073
2074         const char *loading_text = _("Loading...");
2075
2076         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
2077
2078         font_desc = pango_font_description_new ();
2079
2080
2081         /* We set the font to be 10 points, get the size, and scale appropriately */
2082         pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
2083         pango_layout_set_font_description (layout, font_desc);
2084         pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
2085
2086         /* Make sure we fit the middle of the page */
2087         target_width = MAX (page_area->width / 2, 1);
2088         real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
2089         pango_font_description_set_size (font_desc, (int)real_scale);
2090         pango_layout_set_font_description (layout, font_desc);
2091         pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
2092
2093         gtk_paint_layout (GTK_WIDGET (view)->style,
2094                           GTK_WIDGET (view)->window,
2095                           GTK_WIDGET_STATE (view),
2096                           FALSE,
2097                           page_area,
2098                           GTK_WIDGET (view),
2099                           NULL,
2100                           page_area->x + (target_width/2),
2101                           page_area->y + (page_area->height - logical_rect.height) / 2,
2102                           layout);
2103
2104         pango_font_description_free (font_desc);
2105         g_object_unref (layout);
2106 }
2107
2108 static void
2109 draw_one_page (EvView          *view,
2110                gint             page,
2111                GdkRectangle    *page_area,
2112                GtkBorder       *border,
2113                GdkRectangle    *expose_area)
2114 {
2115         gint width, height;
2116         GdkPixbuf *current_pixbuf;
2117         GdkRectangle overlap;
2118         GdkRectangle real_page_area;
2119         EvViewSelection *selection;
2120
2121         g_assert (view->document);
2122         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
2123                 return;
2124
2125         selection = find_selection_for_page (view, page);
2126         ev_page_cache_get_size (view->page_cache,
2127                                 page, view->rotation,
2128                                 view->scale,
2129                                 &width, &height);
2130         /* Render the document itself */
2131         real_page_area = *page_area;
2132
2133         real_page_area.x += border->left;
2134         real_page_area.y += border->top;
2135         real_page_area.width -= (border->left + border->right);
2136         real_page_area.height -= (border->top + border->bottom);
2137
2138         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
2139                                          GTK_WIDGET (view),
2140                                          page_area, border);
2141
2142         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
2143                 GdkPixbuf *selection_pixbuf = NULL;
2144                 GdkPixbuf *scaled_image;
2145                 GdkPixbuf *scaled_selection;
2146
2147                 current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
2148
2149                 /* Get the selection pixbuf iff we have something to draw */
2150                 if (current_pixbuf && view->selection_mode == EV_VIEW_SELECTION_TEXT && selection)
2151                         selection_pixbuf = ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
2152                                                                                  page,
2153                                                                                  view->scale,
2154                                                                                  NULL);
2155
2156                 if (current_pixbuf == NULL)
2157                         scaled_image = NULL;
2158                 else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
2159                          height == gdk_pixbuf_get_height (current_pixbuf))
2160                         scaled_image = g_object_ref (current_pixbuf);
2161                 else
2162                         /* FIXME: We don't want to scale the whole area, just the right
2163                          * area of it */
2164                         scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
2165                                                                 width, height,
2166                                                                 GDK_INTERP_NEAREST);
2167
2168                 if (selection_pixbuf == NULL)
2169                         scaled_selection = NULL;
2170                 else if (width == gdk_pixbuf_get_width (selection_pixbuf) &&
2171                          height == gdk_pixbuf_get_height (selection_pixbuf))
2172                         scaled_selection = g_object_ref (selection_pixbuf);
2173                 else
2174                         /* FIXME: We don't want to scale the whole area, just the right
2175                          * area of it */
2176                         scaled_selection = gdk_pixbuf_scale_simple (selection_pixbuf,
2177                                                                     width, height,
2178                                                                     GDK_INTERP_NEAREST);
2179
2180                 if (scaled_image) {
2181                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
2182                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
2183                                          scaled_image,
2184                                          overlap.x - real_page_area.x,
2185                                          overlap.y - real_page_area.y,
2186                                          overlap.x, overlap.y,
2187                                          overlap.width, overlap.height,
2188                                          GDK_RGB_DITHER_NORMAL,
2189                                          0, 0);
2190                         g_object_unref (scaled_image);
2191                 } else {
2192                         draw_loading_text (view,
2193                                            &real_page_area,
2194                                            expose_area);
2195                 }
2196
2197                 if (scaled_selection) {
2198                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
2199                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
2200                                          scaled_selection,
2201                                          overlap.x - real_page_area.x,
2202                                          overlap.y - real_page_area.y,
2203                                          overlap.x, overlap.y,
2204                                          overlap.width, overlap.height,
2205                                          GDK_RGB_DITHER_NORMAL,
2206                                          0, 0);
2207                         g_object_unref (scaled_selection);
2208                 }
2209         }
2210 }
2211
2212 /*** GObject functions ***/
2213
2214 static void
2215 ev_view_finalize (GObject *object)
2216 {
2217         EvView *view = EV_VIEW (object);
2218
2219         LOG ("Finalize");
2220
2221         g_free (view->status);
2222         g_free (view->find_status);
2223
2224         clear_selection (view);
2225
2226         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
2227 }
2228
2229 static void
2230 ev_view_destroy (GtkObject *object)
2231 {
2232         EvView *view = EV_VIEW (object);
2233
2234         if (view->document) {
2235                 g_object_unref (view->document);
2236                 view->document = NULL;
2237         }
2238
2239         if (view->pixbuf_cache) {
2240                 g_object_unref (view->pixbuf_cache);
2241                 view->pixbuf_cache = NULL;
2242         }
2243
2244         if (view->link_tooltip) {
2245                 gtk_widget_destroy (view->link_tooltip);
2246         }
2247
2248         if (view->selection_scroll_id) {
2249             g_source_remove (view->selection_scroll_id);
2250             view->selection_scroll_id = 0;
2251         }
2252
2253         if (view->selection_update_id) {
2254             g_source_remove (view->selection_update_id);
2255             view->selection_update_id = 0;
2256         }
2257
2258         ev_view_set_scroll_adjustments (view, NULL, NULL);
2259
2260         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
2261 }
2262
2263 static void
2264 ev_view_set_property (GObject      *object,
2265                       guint         prop_id,
2266                       const GValue *value,
2267                       GParamSpec   *pspec)
2268 {
2269         EvView *view = EV_VIEW (object);
2270
2271         switch (prop_id)
2272         {
2273         case PROP_CONTINUOUS:
2274                 ev_view_set_continuous (view, g_value_get_boolean (value));
2275                 break;
2276         case PROP_DUAL_PAGE:
2277                 ev_view_set_dual_page (view, g_value_get_boolean (value));
2278                 break;
2279         case PROP_FULLSCREEN:
2280                 ev_view_set_fullscreen (view, g_value_get_boolean (value));
2281                 break;
2282         case PROP_PRESENTATION:
2283                 ev_view_set_presentation (view, g_value_get_boolean (value));
2284                 break;
2285         case PROP_SIZING_MODE:
2286                 ev_view_set_sizing_mode (view, g_value_get_enum (value));
2287                 break;
2288         case PROP_ZOOM:
2289                 ev_view_set_zoom (view, g_value_get_double (value), FALSE);
2290                 break;
2291         case PROP_ROTATION:
2292                 ev_view_set_rotation (view, g_value_get_int (value));
2293                 break;
2294         default:
2295                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2296         }
2297 }
2298
2299 static AtkObject *
2300 ev_view_get_accessible (GtkWidget *widget)
2301 {
2302         static gboolean first_time = TRUE;
2303
2304         if (first_time) {
2305                 AtkObjectFactory *factory;
2306                 AtkRegistry *registry;
2307                 GType derived_type;
2308                 GType derived_atk_type;
2309
2310                 /*
2311                  * Figure out whether accessibility is enabled by looking at the
2312                  * type of the accessible object which would be created for
2313                  * the parent type of EvView.
2314                  */
2315                 derived_type = g_type_parent (EV_TYPE_VIEW);
2316
2317                 registry = atk_get_default_registry ();
2318                 factory = atk_registry_get_factory (registry,
2319                                                     derived_type);
2320                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
2321                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
2322                         atk_registry_set_factory_type (registry,
2323                                                        EV_TYPE_VIEW,
2324                                                        ev_view_accessible_factory_get_type ());
2325                 first_time = FALSE;
2326         }
2327         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
2328 }
2329
2330 static void
2331 ev_view_get_property (GObject *object,
2332                       guint prop_id,
2333                       GValue *value,
2334                       GParamSpec *pspec)
2335 {
2336         EvView *view = EV_VIEW (object);
2337
2338         switch (prop_id)
2339         {
2340         case PROP_STATUS:
2341                 g_value_set_string (value, view->status);
2342                 break;
2343         case PROP_FIND_STATUS:
2344                 g_value_set_string (value, view->status);
2345                 break;
2346         case PROP_CONTINUOUS:
2347                 g_value_set_boolean (value, view->continuous);
2348                 break;
2349         case PROP_DUAL_PAGE:
2350                 g_value_set_boolean (value, view->dual_page);
2351                 break;
2352         case PROP_FULLSCREEN:
2353                 g_value_set_boolean (value, view->fullscreen);
2354                 break;
2355         case PROP_PRESENTATION:
2356                 g_value_set_boolean (value, view->presentation);
2357                 break;
2358         case PROP_SIZING_MODE:
2359                 g_value_set_enum (value, view->sizing_mode);
2360                 break;
2361         case PROP_ZOOM:
2362                 g_value_set_double (value, view->scale);
2363                 break;
2364         case PROP_ROTATION:
2365                 g_value_set_int (value, view->rotation);
2366                 break;
2367         case PROP_HAS_SELECTION:
2368                 g_value_set_boolean (value,
2369                                      view->selection_info.selections != NULL);
2370                 break;
2371         default:
2372                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2373         }
2374 }
2375
2376 static void
2377 ev_view_class_init (EvViewClass *class)
2378 {
2379         GObjectClass *object_class = G_OBJECT_CLASS (class);
2380         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
2381         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
2382         GtkBindingSet *binding_set;
2383
2384         object_class->finalize = ev_view_finalize;
2385         object_class->set_property = ev_view_set_property;
2386         object_class->get_property = ev_view_get_property;
2387
2388         widget_class->expose_event = ev_view_expose_event;
2389         widget_class->button_press_event = ev_view_button_press_event;
2390         widget_class->motion_notify_event = ev_view_motion_notify_event;
2391         widget_class->button_release_event = ev_view_button_release_event;
2392         widget_class->focus_in_event = ev_view_focus_in;
2393         widget_class->focus_out_event = ev_view_focus_out;
2394         widget_class->get_accessible = ev_view_get_accessible;
2395         widget_class->size_request = ev_view_size_request;
2396         widget_class->size_allocate = ev_view_size_allocate;
2397         widget_class->realize = ev_view_realize;
2398         widget_class->scroll_event = ev_view_scroll_event;
2399         widget_class->enter_notify_event = ev_view_enter_notify_event;
2400         widget_class->leave_notify_event = ev_view_leave_notify_event;
2401         widget_class->style_set = ev_view_style_set;
2402         widget_class->drag_data_get = ev_view_drag_data_get;
2403         widget_class->popup_menu = ev_view_popup_menu;
2404         gtk_object_class->destroy = ev_view_destroy;
2405
2406         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
2407         class->binding_activated = ev_view_binding_activated;
2408
2409         widget_class->set_scroll_adjustments_signal =
2410             g_signal_new ("set-scroll-adjustments",
2411                           G_OBJECT_CLASS_TYPE (object_class),
2412                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2413                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
2414                           NULL, NULL,
2415                           ev_marshal_VOID__OBJECT_OBJECT,
2416                           G_TYPE_NONE, 2,
2417                           GTK_TYPE_ADJUSTMENT,
2418                           GTK_TYPE_ADJUSTMENT);
2419
2420         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
2421                          G_TYPE_FROM_CLASS (object_class),
2422                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2423                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
2424                          NULL, NULL,
2425                          ev_marshal_VOID__ENUM_BOOLEAN,
2426                          G_TYPE_NONE, 2,
2427                          GTK_TYPE_SCROLL_TYPE,
2428                          G_TYPE_BOOLEAN);
2429
2430         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
2431                          G_TYPE_FROM_CLASS (object_class),
2432                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2433                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
2434                          NULL, NULL,
2435                          ev_marshal_VOID__VOID,
2436                          G_TYPE_NONE, 0, G_TYPE_NONE);
2437         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
2438                          G_TYPE_FROM_CLASS (object_class),
2439                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2440                          G_STRUCT_OFFSET (EvViewClass, external_link),
2441                          NULL, NULL,
2442                          g_cclosure_marshal_VOID__OBJECT,
2443                          G_TYPE_NONE, 1,
2444                          G_TYPE_OBJECT);
2445         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
2446                          G_TYPE_FROM_CLASS (object_class),
2447                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2448                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
2449                          NULL, NULL,
2450                          g_cclosure_marshal_VOID__OBJECT,
2451                          G_TYPE_NONE, 1,
2452                          G_TYPE_OBJECT);
2453
2454         g_object_class_install_property (object_class,
2455                                          PROP_STATUS,
2456                                          g_param_spec_string ("status",
2457                                                               "Status Message",
2458                                                               "The status message",
2459                                                               NULL,
2460                                                               G_PARAM_READABLE));
2461
2462         g_object_class_install_property (object_class,
2463                                          PROP_FIND_STATUS,
2464                                          g_param_spec_string ("find-status",
2465                                                               "Find Status Message",
2466                                                               "The find status message",
2467                                                               NULL,
2468                                                               G_PARAM_READABLE));
2469
2470         g_object_class_install_property (object_class,
2471                                          PROP_CONTINUOUS,
2472                                          g_param_spec_boolean ("continuous",
2473                                                                "Continuous",
2474                                                                "Continuous scrolling mode",
2475                                                                TRUE,
2476                                                                G_PARAM_READWRITE));
2477
2478         g_object_class_install_property (object_class,
2479                                          PROP_DUAL_PAGE,
2480                                          g_param_spec_boolean ("dual-page",
2481                                                                "Dual Page",
2482                                                                "Two pages visible at once",
2483                                                                FALSE,
2484                                                                G_PARAM_READWRITE));
2485         g_object_class_install_property (object_class,
2486                                          PROP_FULLSCREEN,
2487                                          g_param_spec_boolean ("fullscreen",
2488                                                                "Full Screen",
2489                                                                "Draw page in a fullscreen fashion",
2490                                                                FALSE,
2491                                                                G_PARAM_READWRITE));
2492         g_object_class_install_property (object_class,
2493                                          PROP_PRESENTATION,
2494                                          g_param_spec_boolean ("presentation",
2495                                                                "Presentation",
2496                                                                "Draw page in presentation mode",
2497                                                                TRUE,
2498                                                                G_PARAM_READWRITE));
2499
2500         g_object_class_install_property (object_class,
2501                                          PROP_SIZING_MODE,
2502                                          g_param_spec_enum ("sizing-mode",
2503                                                             "Sizing Mode",
2504                                                             "Sizing Mode",
2505                                                             EV_TYPE_SIZING_MODE,
2506                                                             EV_SIZING_FIT_WIDTH,
2507                                                             G_PARAM_READWRITE));
2508
2509         g_object_class_install_property (object_class,
2510                                          PROP_ZOOM,
2511                                          g_param_spec_double ("zoom",
2512                                                               "Zoom factor",
2513                                                                "Zoom factor",
2514                                                                MIN_SCALE,
2515                                                                MAX_SCALE,
2516                                                                1.0,
2517                                                                G_PARAM_READWRITE));
2518         g_object_class_install_property (object_class,
2519                                          PROP_ROTATION,
2520                                          g_param_spec_double ("rotation",
2521                                                               "Rotation",
2522                                                                "Rotation",
2523                                                                0,
2524                                                                360,
2525                                                                0,
2526                                                                G_PARAM_READWRITE));
2527         g_object_class_install_property (object_class,
2528                                          PROP_HAS_SELECTION,
2529                                          g_param_spec_boolean ("has-selection",
2530                                                                "Has selection",
2531                                                                "The view has selections",
2532                                                                FALSE,
2533                                                                G_PARAM_READABLE));
2534
2535         binding_set = gtk_binding_set_by_class (class);
2536
2537         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
2538         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
2539         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
2540         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
2541 }
2542
2543 static void
2544 ev_view_init (EvView *view)
2545 {
2546         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
2547
2548         view->spacing = 5;
2549         view->scale = 1.0;
2550         view->current_page = 0;
2551         view->pressed_button = -1;
2552         view->cursor = EV_VIEW_CURSOR_NORMAL;
2553         view->drag_info.in_drag = FALSE;
2554         view->selection_info.selections = NULL;
2555         view->selection_info.in_selection = FALSE;
2556         view->selection_info.in_drag = FALSE;
2557         view->selection_mode = EV_VIEW_SELECTION_TEXT;
2558         view->continuous = TRUE;
2559         view->dual_page = FALSE;
2560         view->presentation = FALSE;
2561         view->fullscreen = FALSE;
2562         view->sizing_mode = EV_SIZING_FIT_WIDTH;
2563         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2564 }
2565
2566 /*** Callbacks ***/
2567
2568 static void
2569 find_changed_cb (EvDocument *document, int page, EvView *view)
2570 {
2571         jump_to_find_page (view, EV_VIEW_FIND_NEXT);
2572         jump_to_find_result (view);
2573         update_find_status_message (view);
2574
2575         if (view->current_page == page)
2576                 gtk_widget_queue_draw (GTK_WIDGET (view));
2577 }
2578
2579 static void
2580 job_finished_cb (EvPixbufCache *pixbuf_cache,
2581                  EvView        *view)
2582 {
2583         gtk_widget_queue_draw (GTK_WIDGET (view));
2584 }
2585
2586 static void
2587 page_changed_cb (EvPageCache *page_cache,
2588                  int          new_page,
2589                  EvView      *view)
2590 {
2591         if (view->current_page != new_page) {
2592
2593                 view->current_page = new_page;
2594                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
2595                 gtk_widget_queue_resize (GTK_WIDGET (view));
2596
2597                 if (EV_IS_DOCUMENT_FIND (view->document)) {
2598                         view->find_page = new_page;
2599                         view->find_result = 0;
2600                         update_find_status_message (view);
2601                 }
2602         }
2603 }
2604
2605 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
2606                                          EvView *view)
2607 {
2608         int dx = 0, dy = 0;
2609
2610         if (! GTK_WIDGET_REALIZED (view))
2611                 return;
2612
2613         if (view->hadjustment) {
2614                 dx = view->scroll_x - (int) view->hadjustment->value;
2615                 view->scroll_x = (int) view->hadjustment->value;
2616         } else {
2617                 view->scroll_x = 0;
2618         }
2619
2620         if (view->vadjustment) {
2621                 dy = view->scroll_y - (int) view->vadjustment->value;
2622                 view->scroll_y = (int) view->vadjustment->value;
2623         } else {
2624                 view->scroll_y = 0;
2625         }
2626
2627
2628         if (view->pending_resize)
2629                 gtk_widget_queue_draw (GTK_WIDGET (view));
2630         else
2631                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
2632
2633
2634         if (view->document)
2635                 view_update_range_and_current_page (view);
2636 }
2637
2638 GtkWidget*
2639 ev_view_new (void)
2640 {
2641         GtkWidget *view;
2642
2643         view = g_object_new (EV_TYPE_VIEW, NULL);
2644
2645         return view;
2646 }
2647
2648 static void
2649 setup_caches (EvView *view)
2650 {
2651         view->page_cache = ev_page_cache_get (view->document);
2652         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
2653         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
2654         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
2655 }
2656
2657 static void
2658 clear_caches (EvView *view)
2659 {
2660         if (view->pixbuf_cache) {
2661                 g_object_unref (view->pixbuf_cache);
2662                 view->pixbuf_cache = NULL;
2663         }
2664
2665         if (view->page_cache) {
2666                 view->page_cache = NULL;
2667         }
2668 }
2669
2670 void
2671 ev_view_set_document (EvView     *view,
2672                       EvDocument *document)
2673 {
2674         g_return_if_fail (EV_IS_VIEW (view));
2675
2676         if (document != view->document) {
2677                 clear_caches (view);
2678
2679                 if (view->document) {
2680                         g_signal_handlers_disconnect_by_func (view->document,
2681                                                               find_changed_cb,
2682                                                               view);
2683                         g_object_unref (view->document);
2684                         view->page_cache = NULL;
2685
2686                 }
2687
2688                 view->document = document;
2689                 view->find_page = 0;
2690                 view->find_result = 0;
2691
2692                 if (view->document) {
2693                         g_object_ref (view->document);
2694                         if (EV_IS_DOCUMENT_FIND (view->document)) {
2695                                 g_signal_connect (view->document,
2696                                                   "find_changed",
2697                                                   G_CALLBACK (find_changed_cb),
2698                                                   view);
2699                         }
2700
2701                         setup_caches (view);
2702                 }
2703
2704                 gtk_widget_queue_resize (GTK_WIDGET (view));
2705         }
2706 }
2707
2708 /*** Zoom and sizing mode ***/
2709
2710 #define EPSILON 0.0000001
2711 void
2712 ev_view_set_zoom (EvView   *view,
2713                   double    factor,
2714                   gboolean  relative)
2715 {
2716         double scale;
2717
2718         if (relative)
2719                 scale = view->scale * factor;
2720         else
2721                 scale = factor;
2722
2723         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
2724
2725         if (ABS (view->scale - scale) < EPSILON)
2726                 return;
2727
2728         view->scale = scale;
2729         view->pending_resize = TRUE;
2730
2731         gtk_widget_queue_resize (GTK_WIDGET (view));
2732
2733         g_object_notify (G_OBJECT (view), "zoom");
2734 }
2735
2736 double
2737 ev_view_get_zoom (EvView *view)
2738 {
2739         return view->scale;
2740 }
2741
2742 gboolean
2743 ev_view_get_continuous (EvView *view)
2744 {
2745         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2746
2747         return view->continuous;
2748 }
2749
2750 void
2751 ev_view_set_continuous (EvView   *view,
2752                         gboolean  continuous)
2753 {
2754         g_return_if_fail (EV_IS_VIEW (view));
2755
2756         continuous = continuous != FALSE;
2757
2758         if (view->continuous != continuous) {
2759                 view->continuous = continuous;
2760                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
2761                 gtk_widget_queue_resize (GTK_WIDGET (view));
2762         }
2763
2764         g_object_notify (G_OBJECT (view), "continuous");
2765 }
2766
2767 gboolean
2768 ev_view_get_dual_page (EvView *view)
2769 {
2770         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2771
2772         return view->dual_page;
2773 }
2774
2775 void
2776 ev_view_set_dual_page (EvView   *view,
2777                        gboolean  dual_page)
2778 {
2779         g_return_if_fail (EV_IS_VIEW (view));
2780
2781         dual_page = dual_page != FALSE;
2782
2783         if (view->dual_page == dual_page)
2784                 return;
2785
2786         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
2787         view->dual_page = dual_page;
2788         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2789          * preload_cache_size to be 2 if dual_page is set.
2790          */
2791         gtk_widget_queue_resize (GTK_WIDGET (view));
2792
2793         g_object_notify (G_OBJECT (view), "dual-page");
2794 }
2795
2796 void
2797 ev_view_set_fullscreen (EvView   *view,
2798                          gboolean  fullscreen)
2799 {
2800         g_return_if_fail (EV_IS_VIEW (view));
2801
2802         fullscreen = fullscreen != FALSE;
2803
2804         if (view->fullscreen == fullscreen)
2805                 return;
2806
2807         view->fullscreen = fullscreen;
2808         gtk_widget_queue_resize (GTK_WIDGET (view));
2809
2810         g_object_notify (G_OBJECT (view), "fullscreen");
2811 }
2812
2813 gboolean
2814 ev_view_get_fullscreen (EvView *view)
2815 {
2816         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2817
2818         return view->fullscreen;
2819 }
2820
2821 void
2822 ev_view_set_presentation (EvView   *view,
2823                           gboolean  presentation)
2824 {
2825         g_return_if_fail (EV_IS_VIEW (view));
2826
2827         presentation = presentation != FALSE;
2828
2829         if (view->presentation == presentation)
2830                 return;
2831
2832         view->presentation = presentation;
2833         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
2834         gtk_widget_queue_resize (GTK_WIDGET (view));
2835
2836         if (GTK_WIDGET_REALIZED (view)) {
2837                 if (view->presentation)
2838                         gdk_window_set_background (GTK_WIDGET(view)->window,
2839                                                    &GTK_WIDGET (view)->style->black);
2840                 else
2841                         gdk_window_set_background (GTK_WIDGET(view)->window,
2842                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
2843         }
2844
2845
2846         g_object_notify (G_OBJECT (view), "presentation");
2847 }
2848
2849 gboolean
2850 ev_view_get_presentation (EvView *view)
2851 {
2852         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2853
2854         return view->presentation;
2855 }
2856
2857 void
2858 ev_view_set_sizing_mode (EvView       *view,
2859                          EvSizingMode  sizing_mode)
2860 {
2861         g_return_if_fail (EV_IS_VIEW (view));
2862
2863         if (view->sizing_mode == sizing_mode)
2864                 return;
2865
2866         view->sizing_mode = sizing_mode;
2867         gtk_widget_queue_resize (GTK_WIDGET (view));
2868
2869         g_object_notify (G_OBJECT (view), "sizing-mode");
2870 }
2871
2872 EvSizingMode
2873 ev_view_get_sizing_mode (EvView *view)
2874 {
2875         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
2876
2877         return view->sizing_mode;
2878 }
2879
2880 gboolean
2881 ev_view_can_zoom_in (EvView *view)
2882 {
2883         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
2884 }
2885
2886 gboolean
2887 ev_view_can_zoom_out (EvView *view)
2888 {
2889         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
2890 }
2891
2892 void
2893 ev_view_zoom_in (EvView *view)
2894 {
2895         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2896
2897         view->pending_scroll = SCROLL_TO_CENTER;
2898         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
2899 }
2900
2901 void
2902 ev_view_zoom_out (EvView *view)
2903 {
2904         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2905
2906         view->pending_scroll = SCROLL_TO_CENTER;
2907         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
2908 }
2909
2910 void
2911 ev_view_rotate_right (EvView *view)
2912 {
2913         int rotation = view->rotation + 90;
2914
2915         if (rotation >= 360) {
2916                 rotation -= 360;
2917         }
2918
2919         ev_view_set_rotation (view, rotation);
2920 }
2921
2922 void
2923 ev_view_rotate_left (EvView *view)
2924 {
2925         int rotation = view->rotation - 90;
2926
2927         if (rotation < 0) {
2928                 rotation += 360;
2929         }
2930
2931         ev_view_set_rotation (view, rotation);
2932 }
2933
2934 void
2935 ev_view_set_rotation (EvView *view, int rotation)
2936 {
2937         view->rotation = rotation;
2938
2939         if (view->pixbuf_cache) {
2940                 ev_pixbuf_cache_clear (view->pixbuf_cache);
2941                 gtk_widget_queue_resize (GTK_WIDGET (view));
2942         }
2943
2944         if (rotation != 0)
2945                 clear_selection (view);
2946
2947         g_object_notify (G_OBJECT (view), "rotation");
2948 }
2949
2950 int
2951 ev_view_get_rotation (EvView *view)
2952 {
2953         return view->rotation;
2954 }
2955
2956 static double
2957 zoom_for_size_fit_width (int doc_width,
2958                          int doc_height,
2959                          int target_width,
2960                          int target_height,
2961                          int vsb_width)
2962 {
2963         double scale;
2964
2965         scale = (double)target_width / doc_width;
2966
2967         if (doc_height * scale > target_height)
2968                 scale = (double) (target_width - vsb_width) / doc_width;
2969
2970         return scale;
2971 }
2972
2973 static double
2974 zoom_for_size_fit_height (int doc_width,
2975                           int doc_height,
2976                           int target_width,
2977                           int target_height,
2978                           int vsb_height)
2979 {
2980         double scale;
2981
2982         scale = (double)target_height / doc_height;
2983
2984         if (doc_width * scale > target_width)
2985                 scale = (double) (target_height - vsb_height) / doc_height;
2986
2987         return scale;
2988 }
2989
2990 static double
2991 zoom_for_size_best_fit (int doc_width,
2992                         int doc_height,
2993                         int target_width,
2994                         int target_height,
2995                         int vsb_width,
2996                         int hsb_width)
2997 {
2998         double w_scale;
2999         double h_scale;
3000
3001         w_scale = (double)target_width / doc_width;
3002         h_scale = (double)target_height / doc_height;
3003
3004         if (doc_height * w_scale > target_height)
3005                 w_scale = (double) (target_width - vsb_width) / doc_width;
3006         if (doc_width * h_scale > target_width)
3007                 h_scale = (double) (target_height - hsb_width) / doc_height;
3008
3009         return MIN (w_scale, h_scale);
3010 }
3011
3012
3013 static void
3014 ev_view_zoom_for_size_presentation (EvView *view,
3015                                     int     width,
3016                                     int     height)
3017 {
3018         int doc_width, doc_height;
3019         gdouble scale;
3020
3021         ev_page_cache_get_size (view->page_cache,
3022                                 view->current_page,
3023                                 view->rotation,
3024                                 1.0,
3025                                 &doc_width,
3026                                 &doc_height);
3027         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
3028         ev_view_set_zoom (view, scale, FALSE);
3029 }
3030
3031 static void
3032 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
3033                            int     width,
3034                            int     height,
3035                            int     vsb_width,
3036                            int     hsb_height)
3037 {
3038         int doc_width, doc_height;
3039         GtkBorder border;
3040         gdouble scale;
3041
3042         ev_page_cache_get_max_width (view->page_cache,
3043                                      view->rotation,
3044                                      1.0,
3045                                      &doc_width);
3046         ev_page_cache_get_max_height (view->page_cache,
3047                                       view->rotation,
3048                                       1.0,
3049                                       &doc_height);
3050         compute_border (view, doc_width, doc_height, &border);
3051
3052         doc_width = doc_width * 2;
3053         width -= (2 * (border.left + border.right) + 3 * view->spacing);
3054         height -= (border.top + border.bottom + 2 * view->spacing - 1);
3055
3056         /* FIXME: We really need to calculate the overall height here, not the
3057          * page height.  We assume there's always a vertical scrollbar for
3058          * now.  We need to fix this. */
3059         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3060                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
3061         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3062                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
3063         else
3064                 g_assert_not_reached ();
3065
3066         ev_view_set_zoom (view, scale, FALSE);
3067 }
3068
3069 static void
3070 ev_view_zoom_for_size_continuous (EvView *view,
3071                                   int     width,
3072                                   int     height,
3073                                   int     vsb_width,
3074                                   int     hsb_height)
3075 {
3076         int doc_width, doc_height;
3077         GtkBorder border;
3078         gdouble scale;
3079
3080         ev_page_cache_get_max_width (view->page_cache,
3081                                      view->rotation,
3082                                      1.0,
3083                                      &doc_width);
3084         ev_page_cache_get_max_height (view->page_cache,
3085                                       view->rotation,
3086                                       1.0,
3087                                       &doc_height);
3088         compute_border (view, doc_width, doc_height, &border);
3089
3090         width -= (border.left + border.right + 2 * view->spacing);
3091         height -= (border.top + border.bottom + 2 * view->spacing - 1);
3092
3093         /* FIXME: We really need to calculate the overall height here, not the
3094          * page height.  We assume there's always a vertical scrollbar for
3095          * now.  We need to fix this. */
3096         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3097                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
3098         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3099                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
3100         else
3101                 g_assert_not_reached ();
3102
3103         ev_view_set_zoom (view, scale, FALSE);
3104 }
3105
3106 static void
3107 ev_view_zoom_for_size_dual_page (EvView *view,
3108                                  int     width,
3109                                  int     height,
3110                                  int     vsb_width,
3111                                  int     hsb_height)
3112 {
3113         GtkBorder border;
3114         gint doc_width, doc_height;
3115         gdouble scale;
3116         gint other_page;
3117
3118         other_page = view->current_page ^ 1;
3119
3120         /* Find the largest of the two. */
3121         ev_page_cache_get_size (view->page_cache,
3122                                 view->current_page,
3123                                 view->rotation,
3124                                 1.0,
3125                                 &doc_width, &doc_height);
3126
3127         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
3128                 gint width_2, height_2;
3129                 ev_page_cache_get_size (view->page_cache,
3130                                         other_page,
3131                                         view->rotation,
3132                                         1.0,
3133                                         &width_2, &height_2);
3134                 if (width_2 > doc_width)
3135                         doc_width = width_2;
3136                 if (height_2 > doc_height)
3137                         doc_height = height_2;
3138         }
3139         compute_border (view, doc_width, doc_height, &border);
3140
3141         doc_width = doc_width * 2;
3142         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
3143         height -= (border.top + border.bottom + 2 * view->spacing);
3144
3145         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3146                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
3147         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3148                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
3149         else
3150                 g_assert_not_reached ();
3151
3152         ev_view_set_zoom (view, scale, FALSE);
3153 }
3154
3155 static void
3156 ev_view_zoom_for_size_single_page (EvView *view,
3157                                    int     width,
3158                                    int     height,
3159                                    int     vsb_width,
3160                                    int     hsb_height)
3161 {
3162         int doc_width, doc_height;
3163         GtkBorder border;
3164         gdouble scale;
3165
3166         ev_page_cache_get_size (view->page_cache,
3167                                 view->current_page,
3168                                 view->rotation,
3169                                 1.0,
3170                                 &doc_width,
3171                                 &doc_height);
3172         /* Get an approximate border */
3173         compute_border (view, width, height, &border);
3174
3175         width -= (border.left + border.right + 2 * view->spacing);
3176         height -= (border.top + border.bottom + 2 * view->spacing);
3177
3178         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3179                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
3180         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3181                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
3182         else
3183                 g_assert_not_reached ();
3184
3185         ev_view_set_zoom (view, scale, FALSE);
3186 }
3187
3188 void
3189 ev_view_set_zoom_for_size (EvView *view,
3190                            int     width,
3191                            int     height,
3192                            int     vsb_width,
3193                            int     hsb_height)
3194 {
3195         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3196                           view->sizing_mode == EV_SIZING_BEST_FIT);
3197         g_return_if_fail (width >= 0);
3198         g_return_if_fail (height >= 0);
3199
3200         if (view->document == NULL)
3201                 return;
3202
3203         if (view->presentation)
3204                 ev_view_zoom_for_size_presentation (view, width, height);
3205         else if (view->continuous && view->dual_page)
3206                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
3207         else if (view->continuous)
3208                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
3209         else if (view->dual_page)
3210                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
3211         else
3212                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
3213 }
3214
3215 /*** Status text messages ***/
3216
3217 const char *
3218 ev_view_get_status (EvView *view)
3219 {
3220         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
3221
3222         return view->status;
3223 }
3224
3225 static void
3226 ev_view_set_status (EvView *view, const char *message)
3227 {
3228         g_return_if_fail (EV_IS_VIEW (view));
3229
3230         if (message != view->status) {
3231                 g_free (view->status);
3232                 view->status = g_strdup (message);
3233                 g_object_notify (G_OBJECT (view), "status");
3234         }
3235 }
3236
3237 static void
3238 update_find_status_message (EvView *view)
3239 {
3240         char *message;
3241
3242         if (view->current_page == view->find_page) {
3243                 int results;
3244
3245                 results = ev_document_find_get_n_results
3246                                 (EV_DOCUMENT_FIND (view->document),
3247                                  view->current_page);
3248                 /* TRANS: Sometimes this could be better translated as
3249                    "%d hit(s) on this page".  Therefore this string
3250                    contains plural cases. */
3251                 message = g_strdup_printf (ngettext ("%d found on this page",
3252                                                      "%d found on this page",
3253                                                      results),
3254                                            results);
3255         } else {
3256                 double percent;
3257
3258                 percent = ev_document_find_get_progress
3259                                 (EV_DOCUMENT_FIND (view->document));
3260                 if (percent >= (1.0 - 1e-10)) {
3261                         message = g_strdup (_("Not found"));
3262                 } else {
3263                         message = g_strdup_printf (_("%3d%% remaining to search"),
3264                                                    (int) ((1.0 - percent) * 100));
3265                 }
3266
3267         }
3268         ev_view_set_find_status (view, message);
3269         g_free (message);
3270 }
3271
3272 const char *
3273 ev_view_get_find_status (EvView *view)
3274 {
3275         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
3276
3277         return view->find_status;
3278 }
3279
3280 static void
3281 ev_view_set_find_status (EvView *view, const char *message)
3282 {
3283         g_return_if_fail (EV_IS_VIEW (view));
3284
3285         g_free (view->find_status);
3286         view->find_status = g_strdup (message);
3287         g_object_notify (G_OBJECT (view), "find-status");
3288 }
3289
3290 /*** Find ***/
3291
3292 static void
3293 jump_to_find_result (EvView *view)
3294 {
3295         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3296         EvRectangle rect;
3297         GdkRectangle view_rect;
3298         int n_results;
3299         int page = view->find_page;
3300
3301         n_results = ev_document_find_get_n_results (find, page);
3302
3303         if (n_results > 0  && view->find_result < n_results) {
3304                 ev_document_find_get_result
3305                         (find, page, view->find_result, &rect);
3306
3307                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
3308                 ensure_rectangle_is_visible (view, &view_rect);
3309         }
3310 }
3311
3312 static void
3313 jump_to_find_page (EvView *view, EvViewFindDirection direction)
3314 {
3315         int n_pages, i;
3316
3317         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3318
3319         for (i = 0; i < n_pages; i++) {
3320                 int has_results;
3321                 int page;
3322
3323                 if (direction == EV_VIEW_FIND_NEXT)
3324                         page = view->find_page + i;
3325                 else
3326                         page = view->find_page - i;
3327
3328
3329                 if (page >= n_pages) {
3330                         page = page - n_pages;
3331                 }
3332                 if (page < 0)
3333                         page = page + n_pages;
3334
3335                 has_results = ev_document_find_page_has_results
3336                                 (EV_DOCUMENT_FIND (view->document), page);
3337                 if (has_results == -1) {
3338                         view->find_page = page;
3339                         break;
3340                 } else if (has_results == 1) {
3341                         ev_page_cache_set_current_page (view->page_cache, page);
3342                         break;
3343                 }
3344         }
3345 }
3346
3347 gboolean
3348 ev_view_can_find_next (EvView *view)
3349 {
3350         if (EV_IS_DOCUMENT_FIND (view->document)) {
3351                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3352                 int i, n_pages;
3353
3354                 n_pages = ev_page_cache_get_n_pages (view->page_cache);
3355                 for (i = 0; i < n_pages; i++) {
3356                         if (ev_document_find_get_n_results (find, i) > 0) {
3357                                 return TRUE;
3358                         }
3359                 }
3360         }
3361
3362         return FALSE;
3363 }
3364
3365 void
3366 ev_view_find_next (EvView *view)
3367 {
3368         int n_results, n_pages;
3369         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3370
3371         n_results = ev_document_find_get_n_results (find, view->current_page);
3372
3373         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3374
3375         view->find_result++;
3376
3377         if (view->find_result >= n_results) {
3378
3379                 view->find_result = 0;
3380                 view->find_page++;
3381                 if (view->find_page >= n_pages) {
3382                         view->find_page = 0;
3383                 }
3384
3385                 jump_to_find_page (view, EV_VIEW_FIND_NEXT);
3386                 jump_to_find_result (view);
3387         } else {
3388                 jump_to_find_result (view);
3389                 gtk_widget_queue_draw (GTK_WIDGET (view));
3390         }
3391 }
3392
3393 void
3394 ev_view_find_previous (EvView *view)
3395 {
3396         int n_results, n_pages;
3397         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3398         EvPageCache *page_cache;
3399
3400         page_cache = ev_page_cache_get (view->document);
3401
3402         n_results = ev_document_find_get_n_results (find, view->current_page);
3403
3404         n_pages = ev_page_cache_get_n_pages (page_cache);
3405
3406         view->find_result--;
3407
3408         if (view->find_result < 0) {
3409
3410                 view->find_page--;
3411                 if (view->find_page < 0) {
3412                         view->find_page = n_pages - 1;
3413                 }
3414
3415                 jump_to_find_page (view, EV_VIEW_FIND_PREV);
3416                 view->find_result = ev_document_find_get_n_results (find, view->current_page) - 1;
3417                 jump_to_find_result (view);
3418         } else {
3419                 jump_to_find_result (view);
3420                 gtk_widget_queue_draw (GTK_WIDGET (view));
3421         }
3422 }
3423
3424 /*** Selections ***/
3425
3426 /* compute_new_selection_rect/text calculates the area currently selected by
3427  * view_rect.  each handles a different mode;
3428  */
3429 static GList *
3430 compute_new_selection_rect (EvView       *view,
3431                             GdkPoint     *start,
3432                             GdkPoint     *stop)
3433 {
3434         GdkRectangle view_rect;
3435         int n_pages, i;
3436         GList *list = NULL;
3437
3438         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
3439
3440         view_rect.x = MIN (start->x, stop->x);
3441         view_rect.y = MIN (start->y, stop->y);
3442         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
3443         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
3444
3445         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3446
3447         for (i = 0; i < n_pages; i++) {
3448                 GdkRectangle page_area;
3449                 GtkBorder border;
3450
3451                 if (get_page_extents (view, i, &page_area, &border)) {
3452                         GdkRectangle overlap;
3453
3454                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
3455                                 EvViewSelection *selection;
3456
3457                                 selection = g_new0 (EvViewSelection, 1);
3458                                 selection->page = i;
3459                                 view_rect_to_doc_rect (view, &overlap, &page_area,
3460                                                        &(selection->rect));
3461
3462                                 list = g_list_append (list, selection);
3463                         }
3464                 }
3465         }
3466
3467         return list;
3468 }
3469
3470 static gboolean
3471 gdk_rectangle_point_in (GdkRectangle *rectangle,
3472                         GdkPoint     *point)
3473 {
3474         return rectangle->x <= point->x &&
3475                 rectangle->y <= point->y &&
3476                 point->x < rectangle->x + rectangle->width &&
3477                 point->y < rectangle->y + rectangle->height;
3478 }
3479
3480 static GList *
3481 compute_new_selection_text (EvView   *view,
3482                             GdkPoint *start,
3483                             GdkPoint *stop)
3484 {
3485         int n_pages, i, first, last;
3486         GList *list = NULL;
3487         EvViewSelection *selection;
3488         gint width, height;
3489         int start_page, end_page;
3490
3491         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
3492
3493         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3494
3495         /* First figure out the range of pages the selection
3496          * affects. */
3497         first = n_pages;
3498         last = 0;
3499         if (view->continuous) {
3500                 start_page = 0;
3501                 end_page = n_pages;
3502         } else if (view->dual_page) {
3503                 start_page = view->start_page;
3504                 end_page = view->end_page + 1;
3505         } else {
3506                 start_page = view->current_page;
3507                 end_page = view->current_page + 1;
3508         }
3509
3510         for (i = start_page; i < end_page; i++) {
3511                 GdkRectangle page_area;
3512                 GtkBorder border;
3513
3514                 get_page_extents (view, i, &page_area, &border);
3515                 if (gdk_rectangle_point_in (&page_area, start) ||
3516                     gdk_rectangle_point_in (&page_area, stop)) {
3517                         if (first == n_pages)
3518                                 first = i;
3519                         last = i;
3520                 }
3521
3522         }
3523
3524
3525
3526         /* Now create a list of EvViewSelection's for the affected
3527          * pages.  This could be an empty list, a list of just one
3528          * page or a number of pages.*/
3529         for (i = first; i < last + 1; i++) {
3530                 GdkRectangle page_area;
3531                 GtkBorder border;
3532                 GdkPoint *point;
3533
3534                 ev_page_cache_get_size (view->page_cache, i,
3535                                         view->rotation,
3536                                         1.0, &width, &height);
3537
3538                 selection = g_new0 (EvViewSelection, 1);
3539                 selection->page = i;
3540                 selection->rect.x1 = selection->rect.y1 = 0;
3541                 selection->rect.x2 = width;
3542                 selection->rect.y2 = height;
3543
3544                 get_page_extents (view, i, &page_area, &border);
3545
3546                 if (gdk_rectangle_point_in (&page_area, start))
3547                         point = start;
3548                 else
3549                         point = stop;
3550
3551                 if (i == first)
3552                         view_point_to_doc_point (view, point, &page_area,
3553                                                  &selection->rect.x1,
3554                                                  &selection->rect.y1);
3555
3556                 /* If the selection is contained within just one page,
3557                  * make sure we don't write 'start' into both points
3558                  * in selection->rect. */
3559                 if (first == last)
3560                         point = stop;
3561
3562                 if (i == last)
3563                         view_point_to_doc_point (view, point, &page_area,
3564                                                  &selection->rect.x2,
3565                                                  &selection->rect.y2);
3566
3567                 list = g_list_append (list, selection);
3568         }
3569
3570         return list;
3571 }
3572
3573 /* This function takes the newly calculated list, and figures out which regions
3574  * have changed.  It then queues a redraw approporiately.
3575  */
3576 static void
3577 merge_selection_region (EvView *view,
3578                         GList  *new_list)
3579 {
3580         GList *old_list;
3581         GList *new_list_ptr, *old_list_ptr;
3582
3583         /* Update the selection */
3584         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
3585         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
3586         view->selection_info.selections = new_list;
3587         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
3588         g_object_notify (G_OBJECT (view), "has-selection");
3589
3590         new_list_ptr = new_list;
3591         old_list_ptr = old_list;
3592
3593         while (new_list_ptr || old_list_ptr) {
3594                 EvViewSelection *old_sel, *new_sel;
3595                 int cur_page;
3596                 GdkRegion *region = NULL;
3597
3598                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
3599                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
3600
3601                 /* Assume that the lists are in order, and we run through them
3602                  * comparing them, one page at a time.  We come out with the
3603                  * first page we see. */
3604                 if (new_sel && old_sel) {
3605                         if (new_sel->page < old_sel->page) {
3606                                 new_list_ptr = new_list_ptr->next;
3607                                 old_sel = NULL;
3608                         } else if (new_sel->page > old_sel->page) {
3609                                 old_list_ptr = old_list_ptr->next;
3610                                 new_sel = NULL;
3611                         } else {
3612                                 new_list_ptr = new_list_ptr->next;
3613                                 old_list_ptr = old_list_ptr->next;
3614                         }
3615                 } else if (new_sel) {
3616                         new_list_ptr = new_list_ptr->next;
3617                 } else if (old_sel) {
3618                         old_list_ptr = old_list_ptr->next;
3619                 }
3620
3621                 g_assert (new_sel || old_sel);
3622
3623                 /* is the page we're looking at on the screen?*/
3624                 cur_page = new_sel ? new_sel->page : old_sel->page;
3625                 if (cur_page < view->start_page || cur_page > view->end_page)
3626                         continue;
3627
3628                 /* seed the cache with a new page.  We are going to need the new
3629                  * region too. */
3630                 if (new_sel) {
3631                         GdkRegion *tmp_region = NULL;
3632                         ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
3633                                                               cur_page,
3634                                                               view->scale,
3635                                                               &tmp_region);
3636                         if (tmp_region) {
3637                                 new_sel->covered_region = gdk_region_copy (tmp_region);
3638                         }
3639                 }
3640
3641                 /* Now we figure out what needs redrawing */
3642                 if (old_sel && new_sel) {
3643                         if (old_sel->covered_region &&
3644                             new_sel->covered_region) {
3645                                 /* We only want to redraw the areas that have
3646                                  * changed, so we xor the old and new regions
3647                                  * and redraw if it's different */
3648                                 region = gdk_region_copy (old_sel->covered_region);
3649                                 gdk_region_xor (region, new_sel->covered_region);
3650                                 if (gdk_region_empty (region)) {
3651                                         gdk_region_destroy (region);
3652                                         region = NULL;
3653                                 }
3654                         } else if (old_sel->covered_region) {
3655                                 region = gdk_region_copy (old_sel->covered_region);
3656                         } else if (new_sel->covered_region) {
3657                                 region = gdk_region_copy (new_sel->covered_region);
3658                         }
3659                 } else if (old_sel && !new_sel) {
3660                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
3661                                 region = gdk_region_copy (old_sel->covered_region);
3662                         }
3663                 } else if (!old_sel && new_sel) {
3664                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
3665                                 region = gdk_region_copy (new_sel->covered_region);
3666                         }
3667                 } else {
3668                         g_assert_not_reached ();
3669                 }
3670
3671                 /* Redraw the damaged region! */
3672                 if (region) {
3673                         GdkRectangle page_area;
3674                         GtkBorder border;
3675
3676                         get_page_extents (view, cur_page, &page_area, &border);
3677                         gdk_region_offset (region,
3678                                            page_area.x + border.left - view->scroll_x,
3679                                            page_area.y + border.top - view->scroll_y);
3680                         gdk_window_invalidate_region (GTK_WIDGET (view)->window, region, TRUE);
3681                         gdk_region_destroy (region);
3682                 }
3683         }
3684
3685         /* Free the old list, now that we're done with it. */
3686         g_list_foreach (old_list, (GFunc) selection_free, NULL);
3687 }
3688
3689 static void
3690 compute_selections (EvView   *view,
3691                     GdkPoint *start,
3692                     GdkPoint *stop)
3693 {
3694         GList *list;
3695
3696         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
3697                 list = compute_new_selection_rect (view, start, stop);
3698         else
3699                 list = compute_new_selection_text (view, start, stop);
3700         merge_selection_region (view, list);
3701 }
3702
3703 /* Free's the selection.  It's up to the caller to queue redraws if needed.
3704  */
3705 static void
3706 selection_free (EvViewSelection *selection)
3707 {
3708         if (selection->covered_region)
3709                 gdk_region_destroy (selection->covered_region);
3710         g_free (selection);
3711 }
3712
3713 static void
3714 clear_selection (EvView *view)
3715 {
3716         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
3717         view->selection_info.selections = NULL;
3718         view->selection_info.in_selection = FALSE;
3719         g_object_notify (G_OBJECT (view), "has-selection");
3720 }
3721
3722
3723 void
3724 ev_view_select_all (EvView *view)
3725 {
3726         int n_pages, i;
3727
3728         /* Disable selection on rotated pages for the 0.4.0 series */
3729         if (view->rotation != 0)
3730                 return;
3731
3732         clear_selection (view);
3733
3734         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3735         for (i = 0; i < n_pages; i++) {
3736                 int width, height;
3737                 EvViewSelection *selection;
3738
3739                 ev_page_cache_get_size (view->page_cache,
3740                                         i,
3741                                         view->rotation,
3742                                         1.0, &width, &height);
3743
3744                 selection = g_new0 (EvViewSelection, 1);
3745                 selection->page = i;
3746                 selection->rect.x1 = selection->rect.y1 = 0;
3747                 selection->rect.x2 = width;
3748                 selection->rect.y2 = height;
3749
3750                 view->selection_info.selections = g_list_append (view->selection_info.selections, selection);
3751         }
3752
3753         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, view->selection_info.selections);
3754         g_object_notify (G_OBJECT (view), "has-selection");
3755         gtk_widget_queue_draw (GTK_WIDGET (view));
3756 }
3757
3758 gboolean
3759 ev_view_get_has_selection (EvView *view)
3760 {
3761         return view->selection_info.selections != NULL;
3762 }
3763
3764 static char *
3765 get_selected_text (EvView *ev_view)
3766 {
3767         GString *text;
3768         GList *l;
3769
3770         text = g_string_new (NULL);
3771
3772         ev_document_doc_mutex_lock ();
3773
3774         for (l = ev_view->selection_info.selections; l != NULL; l = l->next) {
3775                 EvViewSelection *selection = (EvViewSelection *)l->data;
3776                 char *tmp;
3777
3778                 tmp = ev_document_get_text (ev_view->document,
3779                                             selection->page,
3780                                             &selection->rect);
3781                 g_string_append (text, tmp);
3782                 g_free (tmp);
3783         }
3784
3785         ev_document_doc_mutex_unlock ();
3786
3787         return g_string_free (text, FALSE);
3788 }
3789
3790 void
3791 ev_view_copy (EvView *ev_view)
3792 {
3793         GtkClipboard *clipboard;
3794         char *text;
3795
3796         if (!ev_document_can_get_text (ev_view->document)) {
3797                 return;
3798         }
3799
3800         text = get_selected_text (ev_view);
3801         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3802                                               GDK_SELECTION_CLIPBOARD);
3803         gtk_clipboard_set_text (clipboard, text, -1);
3804         g_free (text);
3805 }
3806
3807 static void
3808 ev_view_primary_get_cb (GtkClipboard     *clipboard,
3809                         GtkSelectionData *selection_data,
3810                         guint             info,
3811                         gpointer          data)
3812 {
3813         EvView *ev_view = EV_VIEW (data);
3814         char *text;
3815
3816         if (!ev_document_can_get_text (ev_view->document)) {
3817                 return;
3818         }
3819
3820         text = get_selected_text (ev_view);
3821         gtk_selection_data_set_text (selection_data, text, -1);
3822         g_free (text);
3823 }
3824
3825 static void
3826 ev_view_primary_clear_cb (GtkClipboard *clipboard,
3827                           gpointer      data)
3828 {
3829         EvView *view = EV_VIEW (data);
3830
3831         clear_selection (view);
3832 }
3833
3834 static void
3835 ev_view_update_primary_selection (EvView *ev_view)
3836 {
3837         GtkClipboard *clipboard;
3838
3839         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3840                                               GDK_SELECTION_PRIMARY);
3841
3842         if (ev_view->selection_info.selections) {
3843                 if (!gtk_clipboard_set_with_owner (clipboard,
3844                                                    targets,
3845                                                    G_N_ELEMENTS (targets),
3846                                                    ev_view_primary_get_cb,
3847                                                    ev_view_primary_clear_cb,
3848                                                    G_OBJECT (ev_view)))
3849                         ev_view_primary_clear_cb (clipboard, ev_view);
3850         } else {
3851                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
3852                         gtk_clipboard_clear (clipboard);
3853         }
3854 }
3855
3856 /*** Cursor operations ***/
3857
3858 static GdkCursor *
3859 ev_view_create_invisible_cursor(void)
3860 {
3861        GdkBitmap *empty;
3862        GdkColor black = { 0, 0, 0, 0 };
3863        static char bits[] = { 0x00 };
3864
3865        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
3866
3867        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
3868 }
3869
3870 static void
3871 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
3872 {
3873         GdkCursor *cursor = NULL;
3874         GdkDisplay *display;
3875         GtkWidget *widget;
3876
3877         if (view->cursor == new_cursor) {
3878                 return;
3879         }
3880
3881         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
3882         display = gtk_widget_get_display (widget);
3883         view->cursor = new_cursor;
3884
3885         switch (new_cursor) {
3886                 case EV_VIEW_CURSOR_NORMAL:
3887                         gdk_window_set_cursor (widget->window, NULL);
3888                         break;
3889                 case EV_VIEW_CURSOR_IBEAM:
3890                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
3891                         break;
3892                 case EV_VIEW_CURSOR_LINK:
3893                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
3894                         break;
3895                 case EV_VIEW_CURSOR_WAIT:
3896                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
3897                         break;
3898                 case EV_VIEW_CURSOR_HIDDEN:
3899                         cursor = ev_view_create_invisible_cursor ();
3900                         break;
3901                 case EV_VIEW_CURSOR_DRAG:
3902                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
3903                         break;
3904         }
3905
3906         if (cursor) {
3907                 gdk_window_set_cursor (widget->window, cursor);
3908                 gdk_cursor_unref (cursor);
3909                 gdk_flush();
3910         }
3911 }
3912
3913 void
3914 ev_view_hide_cursor (EvView *view)
3915 {
3916        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
3917 }
3918
3919 void
3920 ev_view_show_cursor (EvView *view)
3921 {
3922        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3923 }
3924
3925 gboolean
3926 ev_view_next_page (EvView *view)
3927 {
3928         int page;
3929
3930         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3931
3932         page = ev_page_cache_get_current_page (view->page_cache);
3933         page = ev_view_get_dual_page (view) ? page + 2 : page + 1;
3934
3935         if (page < ev_page_cache_get_n_pages (view->page_cache)) {
3936                 ev_page_cache_set_current_page (view->page_cache, page);
3937                 return TRUE;
3938         } else {
3939                 return FALSE;
3940         }
3941 }
3942
3943 gboolean
3944 ev_view_previous_page (EvView *view)
3945 {
3946         int page;
3947
3948         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3949
3950         page = ev_page_cache_get_current_page (view->page_cache);
3951         page = ev_view_get_dual_page (view) ? page - 2 : page - 1;
3952
3953         if (page >= 0) {
3954                 ev_page_cache_set_current_page (view->page_cache, page);
3955                 return TRUE;
3956         } else {
3957                 return FALSE;
3958         }
3959 }
3960
3961 /*** Enum description for usage in signal ***/
3962
3963 GType
3964 ev_sizing_mode_get_type (void)
3965 {
3966   static GType etype = 0;
3967   if (etype == 0) {
3968     static const GEnumValue values[] = {
3969       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
3970       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
3971       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
3972       { 0, NULL, NULL }
3973     };
3974     etype = g_enum_register_static ("EvSizingMode", values);
3975   }
3976   return etype;
3977 }