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