shell/ev-view.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *  Copyright (C) 2004 Red Hat, Inc
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include <math.h>
  22 #include <gtk/gtkalignment.h>
  23 #include <glib/gi18n.h>
  24 #include <gtk/gtkbindings.h>
  25 #include <gtk/gtkselection.h>
  26 #include <gtk/gtkclipboard.h>
  27 #include <gdk/gdkkeysyms.h>
  28 #include <libgnomevfs/gnome-vfs-utils.h>
  29
  30 #include "ev-marshal.h"
  31 #include "ev-view.h"
  32 #include "ev-utils.h"
  33 #include "ev-selection.h"
  34 #include "ev-document-find.h"
  35 #include "ev-document-misc.h"
  36 #include "ev-debug.h"
  37 #include "ev-job-queue.h"
  38 #include "ev-page-cache.h"
  39 #include "ev-pixbuf-cache.h"
  40 #include "ev-tooltip.h"
  41
  42 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  43 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  44 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  45
  46
  47 enum {
  48         PROP_0,
  49         PROP_STATUS,
  50         PROP_FIND_STATUS,
  51         PROP_CONTINUOUS,
  52         PROP_DUAL_PAGE,
  53         PROP_FULLSCREEN,
  54         PROP_PRESENTATION,
  55         PROP_SIZING_MODE,
  56         PROP_ZOOM,
  57         PROP_ROTATION,
  58 };
  59
  60 enum {
  61         SIGNAL_BINDING_ACTIVATED,
  62         SIGNAL_ZOOM_INVALID,
  63         SIGNAL_EXTERNAL_LINK,
  64         N_SIGNALS,
  65 };
  66
  67 enum {
  68         TARGET_STRING,
  69         TARGET_TEXT,
  70         TARGET_COMPOUND_TEXT,
  71         TARGET_UTF8_STRING,
  72         TARGET_TEXT_BUFFER_CONTENTS
  73 };
  74
  75 static const GtkTargetEntry targets[] = {
  76         { "STRING", 0, TARGET_STRING },
  77         { "TEXT",   0, TARGET_TEXT },
  78         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  79         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  80 };
  81
  82 static guint signals[N_SIGNALS];
  83
  84 typedef enum {
  85         EV_VIEW_CURSOR_NORMAL,
  86         EV_VIEW_CURSOR_IBEAM,
  87         EV_VIEW_CURSOR_LINK,
  88         EV_VIEW_CURSOR_WAIT,
  89         EV_VIEW_CURSOR_HIDDEN,
  90         EV_VIEW_CURSOR_DRAG
  91 } EvViewCursor;
  92
  93 typedef enum {
  94         EV_VIEW_FIND_NEXT,
  95         EV_VIEW_FIND_PREV
  96 } EvViewFindDirection;
  97
  98 #define ZOOM_IN_FACTOR  1.2
  99 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
 100
 101 #define MIN_SCALE 0.05409
 102 #define MAX_SCALE 4.0
 103
 104 /* Information for middle clicking and moving around the doc */
 105 typedef struct {
 106         gboolean in_drag;
 107         GdkPoint start;
 108         gdouble hadj;
 109         gdouble vadj;
 110 } DragInfo;
 111
 112 /* Information for handling selection */
 113 typedef struct {
 114         gboolean in_selection;
 115         GdkPoint start;
 116         GList *selections;
 117 } SelectionInfo;
 118
 119 typedef enum {
 120         SCROLL_TO_KEEP_POSITION,
 121         SCROLL_TO_CURRENT_PAGE,
 122         SCROLL_TO_CENTER
 123 } PendingScroll;
 124
 125 struct _EvView {
 126         GtkWidget parent_instance;
 127
 128         EvDocument *document;
 129
 130         char *status;
 131         char *find_status;
 132
 133         /* Scrolling */
 134         GtkAdjustment *hadjustment;
 135         GtkAdjustment *vadjustment;
 136
 137         gint scroll_x;
 138         gint scroll_y;
 139
 140         /* Information for middle clicking and dragging around. */
 141         DragInfo drag_info;
 142
 143         /* Selection */
 144         gint motion_x;
 145         gint motion_y;
 146         guint selection_update_id;
 147
 148         EvViewSelectionMode selection_mode;
 149         SelectionInfo selection_info;
 150
 151         int pressed_button;
 152         EvViewCursor cursor;
 153         GtkWidget *link_tooltip;
 154         EvLink *hovered_link;
 155
 156         EvPageCache *page_cache;
 157         EvPixbufCache *pixbuf_cache;
 158
 159         gint start_page;
 160         gint end_page;
 161         gint current_page;
 162
 163         EvJobRender *current_job;
 164
 165         int find_page;
 166         int find_result;
 167         int spacing;
 168
 169         int rotation;
 170         double scale;
 171
 172         gboolean continuous;
 173         gboolean dual_page;
 174         gboolean fullscreen;
 175         gboolean presentation;
 176         EvSizingMode sizing_mode;
 177
 178         PendingScroll pending_scroll;
 179         gboolean pending_resize;
 180 };
 181
 182 struct _EvViewClass {
 183         GtkWidgetClass parent_class;
 184
 185         void    (*set_scroll_adjustments) (EvView         *view,
 186                                            GtkAdjustment  *hadjustment,
 187                                            GtkAdjustment  *vadjustment);
 188         void    (*binding_activated)      (EvView         *view,
 189                                            GtkScrollType   scroll,
 190                                            gboolean        horizontal);
 191         void    (*zoom_invalid)           (EvView         *view);
 192         void    (*external_link)          (EvView         *view,
 193                                            EvLink         *link);
 194 };
 195
 196 /*** Scrolling ***/
 197 static void       scroll_to_current_page                     (EvView *view,
 198                                                               GtkOrientation orientation);
 199 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 200                                                               GtkAdjustment      *hadjustment,
 201                                                               GtkAdjustment      *vadjustment);
 202 static void       view_update_range_and_current_page         (EvView             *view);
 203 static void       set_scroll_adjustment                      (EvView             *view,
 204                                                               GtkOrientation      orientation,
 205                                                               GtkAdjustment      *adjustment);
 206 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 207                                                               GtkAdjustment      *hadjustment,
 208                                                               GtkAdjustment      *vadjustment);
 209 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 210                                                               guint               keyval,
 211                                                               GtkScrollType       scroll,
 212                                                               gboolean            horizontal);
 213 static void       ev_view_binding_activated                  (EvView             *view,
 214                                                               GtkScrollType       scroll,
 215                                                               gboolean            horizontal);
 216 static void       ensure_rectangle_is_visible                (EvView             *view,
 217                                                               GdkRectangle       *rect);
 218
 219 /*** Geometry computations ***/
 220 static void       compute_border                             (EvView             *view,
 221                                                               int                 width,
 222                                                               int                 height,
 223                                                               GtkBorder          *border);
 224 static void       get_page_y_offset                          (EvView *view,
 225                                                               int page,
 226                                                               double zoom,
 227                                                               int *y_offset);
 228 static gboolean   get_page_extents                           (EvView             *view,
 229                                                               gint                page,
 230                                                               GdkRectangle       *page_area,
 231                                                               GtkBorder          *border);
 232 static void       view_rect_to_doc_rect                      (EvView             *view,
 233                                                               GdkRectangle       *view_rect,
 234                                                               GdkRectangle       *page_area,
 235                                                               EvRectangle        *doc_rect);
 236 static void       doc_rect_to_view_rect                      (EvView             *view,
 237                                                               int                 page,
 238                                                               EvRectangle        *doc_rect,
 239                                                               GdkRectangle       *view_rect);
 240 static void       find_page_at_location                      (EvView             *view,
 241                                                               gdouble             x,
 242                                                               gdouble             y,
 243                                                               gint               *page,
 244                                                               gint               *x_offset,
 245                                                               gint               *y_offset);
 246
 247 /*** Hyperrefs ***/
 248 static EvLink*    get_link_at_location                       (EvView             *view,
 249                                                               gdouble             x,
 250                                                               gdouble             y);
 251 static char*      tip_from_link                              (EvView             *view,
 252                                                               EvLink             *link);
 253 static void       handle_link_over_xy                        (EvView *view,
 254                                                               gint x,
 255                                                               gint y);
 256 /*** GtkWidget implementation ***/
 257 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 258                                                               GtkRequisition     *requisition);
 259 static void       ev_view_size_request_continuous            (EvView             *view,
 260                                                               GtkRequisition     *requisition);
 261 static void       ev_view_size_request_dual_page             (EvView             *view,
 262                                                               GtkRequisition     *requisition);
 263 static void       ev_view_size_request_single_page           (EvView             *view,
 264                                                               GtkRequisition     *requisition);
 265 static void       ev_view_size_request                       (GtkWidget          *widget,
 266                                                               GtkRequisition     *requisition);
 267 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 268                                                               GtkAllocation      *allocation);
 269 static void       ev_view_realize                            (GtkWidget          *widget);
 270 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 271                                                               GdkEventScroll     *event);
 272 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 273                                                               GdkEventExpose     *event);
 274 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 275                                                               GdkEventButton     *event);
 276 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 277                                                               GdkEventMotion     *event);
 278 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 279                                                               GdkEventButton     *event);
 280 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 281                                                               GdkEventCrossing   *event);
 282 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 283                                                               GdkEventCrossing   *event);
 284 static void       ev_view_style_set                          (GtkWidget          *widget,
 285                                                               GtkStyle           *old_style);
 286
 287 /*** Drawing ***/
 288 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 289 static void       draw_rubberband                            (GtkWidget          *widget,
 290                                                               GdkWindow          *window,
 291                                                               const GdkRectangle *rect,
 292                                                               guchar              alpha);
 293 static void       highlight_find_results                     (EvView             *view,
 294                                                               int                 page);
 295 static void       draw_one_page                              (EvView             *view,
 296                                                               gint                page,
 297                                                               GdkRectangle       *page_area,
 298                                                               GtkBorder          *border,
 299                                                               GdkRectangle       *expose_area);
 300
 301 /*** Callbacks ***/
 302 static void       find_changed_cb                            (EvDocument         *document,
 303                                                               int                 page,
 304                                                               EvView             *view);
 305 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 306                                                               EvView             *view);
 307 static void       page_changed_cb                            (EvPageCache        *page_cache,
 308                                                               int                 new_page,
 309                                                               EvView             *view);
 310 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 311                                                               EvView             *view);
 312
 313 /*** GObject ***/
 314 static void       ev_view_finalize                           (GObject            *object);
 315 static void       ev_view_destroy                            (GtkObject          *object);
 316 static void       ev_view_set_property                       (GObject            *object,
 317                                                               guint               prop_id,
 318                                                               const GValue       *value,
 319                                                               GParamSpec         *pspec);
 320 static void       ev_view_get_property                       (GObject            *object,
 321                                                               guint               prop_id,
 322                                                               GValue             *value,
 323                                                               GParamSpec         *pspec);
 324 static void       ev_view_class_init                         (EvViewClass        *class);
 325 static void       ev_view_init                               (EvView             *view);
 326
 327 /*** Zoom and sizing ***/
 328 static double   zoom_for_size_fit_width                      (int doc_width,
 329                                                               int doc_height,
 330                                                               int target_width,
 331                                                               int target_height,
 332                                                               int vsb_width);
 333 static double   zoom_for_size_fit_height                     (int doc_width,
 334                                                               int doc_height,
 335                                                               int target_width,
 336                                                               int target_height,
 337                                                               int vsb_height);
 338 static double   zoom_for_size_best_fit                       (int doc_width,
 339                                                               int doc_height,
 340                                                               int target_width,
 341                                                               int target_height,
 342                                                               int vsb_width,
 343                                                               int hsb_width);
 344 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 345                                                               int     width,
 346                                                               int     height);
 347 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 348                                                                 int     width,
 349                                                                 int     height,
 350                                                                 int     vsb_width,
 351                                                                 int     hsb_height);
 352 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 353                                                                 int     width,
 354                                                                 int     height,
 355                                                                 int     vsb_width,
 356                                                                 int     hsb_height);
 357 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 358                                                                 int     width,
 359                                                                 int     height,
 360                                                                 int     vsb_width,
 361                                                                 int     hsb_height);
 362 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 363                                                                 int     width,
 364                                                                 int     height,
 365                                                                 int     vsb_width,
 366                                                                 int     hsb_height);
 367 /*** Cursors ***/
 368 static GdkCursor* ev_view_create_invisible_cursor            (void);
 369 static void       ev_view_set_cursor                         (EvView             *view,
 370                                                               EvViewCursor        new_cursor);
 371
 372 /*** Status messages ***/
 373 static void       ev_view_set_status                         (EvView             *view,
 374                                                               const char         *message);
 375 static void       update_find_status_message                 (EvView             *view);
 376 static void       ev_view_set_find_status                    (EvView             *view,
 377                                                               const char         *message);
 378 /*** Find ***/
 379 static void       jump_to_find_result                        (EvView             *view);
 380 static void       jump_to_find_page                          (EvView             *view,
 381                                                               EvViewFindDirection direction);
 382
 383 /*** Selection ***/
 384 static void       compute_selections                         (EvView             *view,
 385                                                               GdkPoint           *start,
 386                                                               GdkPoint           *stop);
 387 static void       clear_selection                            (EvView             *view);
 388 static void       selection_free                             (EvViewSelection    *selection);
 389 static char*      get_selected_text                          (EvView             *ev_view);
 390 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 391                                                               GtkSelectionData   *selection_data,
 392                                                               guint               info,
 393                                                               gpointer            data);
 394 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 395                                                               gpointer            data);
 396 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 397
 398
 399 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 400
 401 static void
 402 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 403 {
 404         GdkRectangle page_area;
 405         GtkBorder border;
 406
 407         if (view->document == NULL) {
 408                 return;
 409         }
 410
 411         get_page_extents (view, view->current_page, &page_area, &border);
 412
 413         if (orientation == GTK_ORIENTATION_VERTICAL) {
 414                 if (view->continuous) {
 415                         gtk_adjustment_clamp_page (view->vadjustment,
 416                                                    page_area.y - view->spacing,
 417                                                    page_area.y + view->vadjustment->page_size);
 418                 } else {
 419                         gtk_adjustment_set_value (view->vadjustment,
 420                                                   view->vadjustment->lower);
 421                 }
 422         } else {
 423                 if (view->dual_page) {
 424                         gtk_adjustment_clamp_page (view->hadjustment,
 425                                                    page_area.x,
 426                                                    page_area.x + view->hadjustment->page_size);
 427                 } else {
 428                         gtk_adjustment_set_value (view->hadjustment,
 429                                                   CLAMP (view->hadjustment->value,
 430                                                   view->hadjustment->lower,
 431                                                   view->hadjustment->upper -
 432                                                   view->hadjustment->page_size));
 433                 }
 434         }
 435 }
 436
 437 static void
 438 view_set_adjustment_values (EvView         *view,
 439                             GtkOrientation  orientation)
 440 {
 441         GtkWidget *widget = GTK_WIDGET (view);
 442         GtkAdjustment *adjustment;
 443         int requisition;
 444         int allocation;
 445
 446         double factor;
 447         gint new_value;
 448
 449         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 450                 requisition = widget->requisition.width;
 451                 allocation = widget->allocation.width;
 452                 adjustment = view->hadjustment;
 453         } else {
 454                 requisition = widget->requisition.height;
 455                 allocation = widget->allocation.height;
 456                 adjustment = view->vadjustment;
 457         }
 458
 459         if (!adjustment)
 460                 return;
 461
 462         factor = 1.0;
 463         switch (view->pending_scroll) {
 464                 case SCROLL_TO_KEEP_POSITION:
 465                         factor = (adjustment->value) / adjustment->upper;
 466                         break;
 467                 case SCROLL_TO_CURRENT_PAGE:
 468                         break;
 469                 case SCROLL_TO_CENTER:
 470                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 471                         break;
 472         }
 473
 474         adjustment->page_size = allocation;
 475         adjustment->step_increment = allocation * 0.1;
 476         adjustment->page_increment = allocation * 0.9;
 477         adjustment->lower = 0;
 478         adjustment->upper = MAX (allocation, requisition);
 479
 480         /*
 481          * We add 0.5 to the values before to average out our rounding errors.
 482          */
 483         switch (view->pending_scroll) {
 484                 case SCROLL_TO_KEEP_POSITION:
 485                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 486                         gtk_adjustment_set_value (adjustment, (int)new_value);
 487                         break;
 488                 case SCROLL_TO_CURRENT_PAGE:
 489                         scroll_to_current_page (view, orientation);
 490                         break;
 491                 case SCROLL_TO_CENTER:
 492                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 493                                            0, adjustment->upper - adjustment->page_size);
 494                         gtk_adjustment_set_value (adjustment, (int)new_value);
 495                         break;
 496         }
 497
 498         gtk_adjustment_changed (adjustment);
 499 }
 500
 501 static void
 502 view_update_range_and_current_page (EvView *view)
 503 {
 504         if (view->pending_scroll != SCROLL_TO_KEEP_POSITION)
 505                 return;
 506
 507         /* Presentation trumps all other modes */
 508         if (view->presentation) {
 509                 view->start_page = view->current_page;
 510                 view->end_page = view->current_page;
 511         } else if (view->continuous) {
 512                 GdkRectangle current_area, unused, page_area;
 513                 GtkBorder border;
 514                 gint current_page;
 515                 gboolean found = FALSE;
 516                 int i;
 517
 518                 if (!(view->vadjustment && view->hadjustment))
 519                         return;
 520
 521                 current_area.x = view->hadjustment->value;
 522                 current_area.width = view->hadjustment->upper;
 523                 current_area.y = view->vadjustment->value;
 524                 current_area.height = view->vadjustment->page_size;
 525
 526                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 527
 528                         get_page_extents (view, i, &page_area, &border);
 529
 530                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 531                                 if (! found) {
 532                                         view->start_page = i;
 533                                         found = TRUE;
 534
 535                                 }
 536                                 view->end_page = i;
 537                         } else if (found) {
 538                                 break;
 539                         }
 540                 }
 541
 542                 current_page = ev_page_cache_get_current_page (view->page_cache);
 543
 544                 if (current_page < view->start_page || current_page > view->end_page) {
 545                         view->current_page = view->start_page;
 546                         ev_page_cache_set_current_page (view->page_cache, view->start_page);
 547                 }
 548         } else {
 549                 if (view->dual_page) {
 550                         if (view->current_page % 2 == 0) {
 551                                 view->start_page = view->current_page;
 552                                 if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 553                                         view->end_page = view->start_page + 1;
 554                                 else
 555                                         view->end_page = view->start_page;
 556                         } else {
 557                                 view->start_page = view->current_page - 1;
 558                                 view->end_page = view->current_page;
 559                         }
 560                 } else {
 561                         view->start_page = view->current_page;
 562                         view->end_page = view->current_page;
 563                 }
 564         }
 565
 566         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 567                                         view->start_page,
 568                                         view->end_page,
 569                                         view->rotation,
 570                                         view->scale,
 571                                         view->selection_info.selections);
 572 }
 573
 574 static void
 575 set_scroll_adjustment (EvView *view,
 576                        GtkOrientation  orientation,
 577                        GtkAdjustment  *adjustment)
 578 {
 579         GtkAdjustment **to_set;
 580
 581         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 582                 to_set = &view->hadjustment;
 583         else
 584                 to_set = &view->vadjustment;
 585
 586         if (*to_set != adjustment) {
 587                 if (*to_set) {
 588                         g_signal_handlers_disconnect_by_func (*to_set,
 589                                                               (gpointer) on_adjustment_value_changed,
 590                                                               view);
 591                         g_object_unref (*to_set);
 592                 }
 593
 594                 *to_set = adjustment;
 595                 view_set_adjustment_values (view, orientation);
 596
 597                 if (*to_set) {
 598                         g_object_ref (*to_set);
 599                         g_signal_connect (*to_set, "value_changed",
 600                                           G_CALLBACK (on_adjustment_value_changed), view);
 601                 }
 602         }
 603 }
 604
 605 static void
 606 ev_view_set_scroll_adjustments (EvView *view,
 607                                 GtkAdjustment  *hadjustment,
 608                                 GtkAdjustment  *vadjustment)
 609 {
 610         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 611         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 612
 613         on_adjustment_value_changed (NULL, view);
 614 }
 615
 616 static void
 617 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 618                            guint           keyval,
 619                            GtkScrollType   scroll,
 620                            gboolean        horizontal)
 621 {
 622   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 623
 624   gtk_binding_entry_add_signal (binding_set, keyval, 0,
 625                                 "binding_activated", 2,
 626                                 GTK_TYPE_SCROLL_TYPE, scroll,
 627                                 G_TYPE_BOOLEAN, horizontal);
 628   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
 629                                 "binding_activated", 2,
 630                                 GTK_TYPE_SCROLL_TYPE, scroll,
 631                                 G_TYPE_BOOLEAN, horizontal);
 632 }
 633
 634 void
 635 ev_view_scroll (EvView        *view,
 636                 EvScrollType   scroll)
 637 {
 638         GtkAdjustment *adjustment;
 639         double value, increment;
 640         gboolean first_page = FALSE;
 641         gboolean last_page = FALSE;
 642
 643         /* Assign values for increment and vertical adjustment */
 644         adjustment = view->vadjustment;
 645         increment = adjustment->page_size * 0.75;
 646         value = adjustment->value;
 647
 648         /* Assign boolean for first and last page */
 649         if (view->current_page == 0)
 650                 first_page = TRUE;
 651         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 652                 last_page = TRUE;
 653
 654         switch (scroll) {
 655                 case EV_SCROLL_PAGE_BACKWARD:
 656                         /* Do not jump backwards if at the first page */
 657                         if (value == (adjustment->lower) && first_page) {
 658                                 /* Do nothing */
 659                                 /* At the top of a page, assign the upper bound limit of previous page */
 660                         } else if (value == (adjustment->lower)) {
 661                                 value = adjustment->upper - adjustment->page_size;
 662                                 ev_page_cache_set_current_page (view->page_cache, view->current_page - 1);
 663                                 /* Jump to the top */
 664                         } else {
 665                                 value = MAX (value - increment, adjustment->lower);
 666                         }
 667                         break;
 668                 case EV_SCROLL_PAGE_FORWARD:
 669                         /* Do not jump forward if at the last page */
 670                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 671                                 /* Do nothing */
 672                         /* At the bottom of a page, assign the lower bound limit of next page */
 673                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 674                                 value = 0;
 675                                 ev_page_cache_set_current_page (view->page_cache, view->current_page + 1);
 676                         /* Jump to the bottom */
 677                         } else {
 678                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 679                         }
 680                         break;
 681                 default:
 682                         break;
 683         }
 684
 685         gtk_adjustment_set_value (adjustment, value);
 686 }
 687
 688 static void
 689 ev_view_binding_activated (EvView *view,
 690                            GtkScrollType scroll,
 691                            gboolean horizontal)
 692 {
 693         GtkAdjustment *adjustment;
 694         double value;
 695
 696         if (view->presentation) {
 697                 switch (scroll) {
 698                         case GTK_SCROLL_STEP_BACKWARD:
 699                                 ev_view_previous_page (view);
 700                                 break;
 701                         case GTK_SCROLL_STEP_FORWARD:
 702                                 ev_view_next_page (view);
 703                                 break;
 704                         default:
 705                                 break;
 706                 }
 707                 return;
 708         }
 709
 710         if (horizontal) {
 711                 adjustment = view->hadjustment;
 712         } else {
 713                 adjustment = view->vadjustment;
 714         }
 715
 716         value = adjustment->value;
 717
 718         switch (scroll) {
 719                 case GTK_SCROLL_STEP_BACKWARD:
 720                         value -= adjustment->step_increment;
 721                         break;
 722                 case GTK_SCROLL_STEP_FORWARD:
 723                         value += adjustment->step_increment;
 724                         break;
 725                 default:
 726                         break;
 727         }
 728
 729         value = CLAMP (value, adjustment->lower,
 730                        adjustment->upper - adjustment->page_size);
 731
 732         gtk_adjustment_set_value (adjustment, value);
 733 }
 734
 735 #define MARGIN 5
 736
 737 static void
 738 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 739 {
 740         GtkWidget *widget = GTK_WIDGET (view);
 741         GtkAdjustment *adjustment;
 742         int value;
 743
 744         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
 745
 746         adjustment = view->vadjustment;
 747
 748         if (rect->y < adjustment->value) {
 749                 value = MAX (adjustment->lower, rect->y - MARGIN);
 750                 gtk_adjustment_set_value (view->vadjustment, value);
 751         } else if (rect->y + rect->height >
 752                    adjustment->value + widget->allocation.height) {
 753                 value = MIN (adjustment->upper, rect->y + rect->height -
 754                              widget->allocation.height + MARGIN);
 755                 gtk_adjustment_set_value (view->vadjustment, value);
 756         }
 757
 758         adjustment = view->hadjustment;
 759
 760         if (rect->x < adjustment->value) {
 761                 value = MAX (adjustment->lower, rect->x - MARGIN);
 762                 gtk_adjustment_set_value (view->hadjustment, value);
 763         } else if (rect->x + rect->height >
 764                    adjustment->value + widget->allocation.width) {
 765                 value = MIN (adjustment->upper, rect->x + rect->width -
 766                              widget->allocation.width + MARGIN);
 767                 gtk_adjustment_set_value (view->hadjustment, value);
 768         }
 769 }
 770
 771 /*** Geometry computations ***/
 772
 773 static void
 774 compute_border (EvView *view, int width, int height, GtkBorder *border)
 775 {
 776         if (view->presentation) {
 777                 border->left = 0;
 778                 border->right = 0;
 779                 border->top = 0;
 780                 border->bottom = 0;
 781         } else {
 782                 ev_document_misc_get_page_border_size (width, height, border);
 783         }
 784 }
 785
 786 static void
 787 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 788 {
 789         int max_width, offset;
 790         GtkBorder border;
 791
 792         g_return_if_fail (y_offset != NULL);
 793
 794         ev_page_cache_get_max_width (view->page_cache, view->rotation, zoom, &max_width);
 795
 796         compute_border (view, max_width, max_width, &border);
 797
 798         if (view->dual_page) {
 799                 ev_page_cache_get_height_to_page (view->page_cache, page,
 800                                                   view->rotation, zoom, NULL, &offset);
 801                 offset += (page / 2 + 1) * view->spacing + (page / 2) * (border.top + border.bottom);
 802         } else {
 803                 ev_page_cache_get_height_to_page (view->page_cache, page,
 804                                                   view->rotation, zoom, &offset, NULL);
 805                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 806         }
 807
 808         *y_offset = offset;
 809         return;
 810 }
 811
 812 static gboolean
 813 get_page_extents (EvView       *view,
 814                   gint          page,
 815                   GdkRectangle *page_area,
 816                   GtkBorder    *border)
 817 {
 818         GtkWidget *widget;
 819         int width, height;
 820
 821         widget = GTK_WIDGET (view);
 822
 823         /* Get the size of the page */
 824         ev_page_cache_get_size (view->page_cache, page,
 825                                 view->rotation,
 826                                 view->scale,
 827                                 &width, &height);
 828         compute_border (view, width, height, border);
 829         page_area->width = width + border->left + border->right;
 830         page_area->height = height + border->top + border->bottom;
 831
 832         if (view->presentation) {
 833                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 834                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 835         } else if (view->continuous) {
 836                 gint max_width;
 837                 gint x, y;
 838
 839                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 840                                              view->scale, &max_width);
 841                 max_width = max_width + border->left + border->right;
 842                 /* Get the location of the bounding box */
 843                 if (view->dual_page) {
 844                         x = view->spacing + (page % 2) * (max_width + view->spacing);
 845                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 846                         if (page % 2 == 0)
 847                                 x = x + (max_width - width - border->left - border->right);
 848                 } else {
 849                         x = view->spacing;
 850                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 851                 }
 852
 853                 get_page_y_offset (view, page, view->scale, &y);
 854
 855                 page_area->x = x;
 856                 page_area->y = y;
 857         } else {
 858                 gint x, y;
 859                 if (view->dual_page) {
 860                         gint width_2, height_2;
 861                         gint max_width = width;
 862                         gint max_height = height;
 863                         GtkBorder overall_border;
 864                         gint other_page;
 865
 866                         other_page = page ^ 1;
 867
 868                         /* First, we get the bounding box of the two pages */
 869                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
 870                                 ev_page_cache_get_size (view->page_cache,
 871                                                         other_page,
 872                                                         view->rotation,
 873                                                         view->scale,
 874                                                         &width_2, &height_2);
 875                                 if (width_2 > width)
 876                                         max_width = width_2;
 877                                 if (height_2 > height)
 878                                         max_height = height_2;
 879                         }
 880                         compute_border (view, max_width, max_height, &overall_border);
 881
 882                         /* Find the offsets */
 883                         x = view->spacing;
 884                         y = view->spacing;
 885
 886                         /* Adjust for being the left or right page */
 887                         if (page % 2 == 0)
 888                                 x = x + max_width - width;
 889                         else
 890                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 891
 892                         y = y + (max_height - height)/2;
 893
 894                         /* Adjust for extra allocation */
 895                         x = x + MAX (0, widget->allocation.width -
 896                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 897                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 898                 } else {
 899                         x = view->spacing;
 900                         y = view->spacing;
 901
 902                         /* Adjust for extra allocation */
 903                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 904                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 905                 }
 906
 907                 page_area->x = x;
 908                 page_area->y = y;
 909         }
 910
 911         return TRUE;
 912 }
 913
 914 static void
 915 view_point_to_doc_point (EvView *view,
 916                          GdkPoint *view_point,
 917                          GdkRectangle *page_area,
 918                          double  *doc_point_x,
 919                          double  *doc_point_y)
 920 {
 921         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 922         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 923 }
 924
 925 static void
 926 view_rect_to_doc_rect (EvView *view,
 927                        GdkRectangle *view_rect,
 928                        GdkRectangle *page_area,
 929                        EvRectangle  *doc_rect)
 930 {
 931         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 932         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 933         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 934         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 935 }
 936
 937 static void
 938 doc_point_to_view_point (EvView       *view,
 939                          int           page,
 940                          EvPoint      *doc_point,
 941                          GdkPoint     *view_point)
 942 {
 943         GdkRectangle page_area;
 944         GtkBorder border;
 945         double x, y;
 946         int width, height;
 947
 948         ev_page_cache_get_size (view->page_cache, page,
 949                                 view->rotation,
 950                                 1.0,
 951                                 &width, &height);
 952
 953         if (view->rotation == 0) {
 954                 x = doc_point->x;
 955                 y = doc_point->y;
 956         } else if (view->rotation == 90) {
 957                 x = width - doc_point->y;
 958                 y = doc_point->x;
 959         } else if (view->rotation == 180) {
 960                 x = width - doc_point->x;
 961                 y = height - doc_point->y;
 962         } else if (view->rotation == 270) {
 963                 x = doc_point->y;
 964                 y = height - doc_point->x;
 965         } else {
 966                 g_assert_not_reached ();
 967         }
 968
 969         get_page_extents (view, page, &page_area, &border);
 970
 971         view_point->x = x * view->scale + page_area.x;
 972         view_point->y = y * view->scale + page_area.y;
 973 }
 974
 975 static void
 976 doc_rect_to_view_rect (EvView       *view,
 977                        int           page,
 978                        EvRectangle  *doc_rect,
 979                        GdkRectangle *view_rect)
 980 {
 981         GdkRectangle page_area;
 982         GtkBorder border;
 983         double x, y, w, h;
 984         int width, height;
 985
 986         ev_page_cache_get_size (view->page_cache, page,
 987                                 view->rotation,
 988                                 1.0,
 989                                 &width, &height);
 990
 991         if (view->rotation == 0) {
 992                 x = doc_rect->x1;
 993                 y = doc_rect->y1;
 994                 w = doc_rect->x2 - doc_rect->x1;
 995                 h = doc_rect->y2 - doc_rect->y1;
 996         } else if (view->rotation == 90) {
 997                 x = width - doc_rect->y2;
 998                 y = doc_rect->x1;
 999                 w = doc_rect->y2 - doc_rect->y1;
1000                 h = doc_rect->x2 - doc_rect->x1;
1001         } else if (view->rotation == 180) {
1002                 x = width - doc_rect->x2;
1003                 y = height - doc_rect->y2;
1004                 w = doc_rect->x2 - doc_rect->x1;
1005                 h = doc_rect->y2 - doc_rect->y1;
1006         } else if (view->rotation == 270) {
1007                 x = doc_rect->y1;
1008                 y = height - doc_rect->x2;
1009                 w = doc_rect->y2 - doc_rect->y1;
1010                 h = doc_rect->x2 - doc_rect->x1;
1011         } else {
1012                 g_assert_not_reached ();
1013         }
1014
1015         get_page_extents (view, page, &page_area, &border);
1016
1017         view_rect->x = x * view->scale + page_area.x;
1018         view_rect->y = y * view->scale + page_area.y;
1019         view_rect->width = w * view->scale;
1020         view_rect->height = h * view->scale;
1021 }
1022
1023 static void
1024 find_page_at_location (EvView  *view,
1025                        gdouble  x,
1026                        gdouble  y,
1027                        gint    *page,
1028                        gint    *x_offset,
1029                        gint    *y_offset)
1030 {
1031         int i;
1032
1033         if (view->document == NULL)
1034                 return;
1035
1036         g_assert (page);
1037         g_assert (x_offset);
1038         g_assert (y_offset);
1039
1040         for (i = view->start_page; i <= view->end_page; i++) {
1041                 GdkRectangle page_area;
1042                 GtkBorder border;
1043
1044                 if (! get_page_extents (view, i, &page_area, &border))
1045                         continue;
1046
1047                 if ((x >= page_area.x + border.left) &&
1048                     (x < page_area.x + page_area.width - border.right) &&
1049                     (y >= page_area.y + border.top) &&
1050                     (y < page_area.y + page_area.height - border.bottom)) {
1051                         *page = i;
1052                         *x_offset = x - (page_area.x + border.left);
1053                         *y_offset = y - (page_area.y + border.top);
1054                         return;
1055                 }
1056         }
1057
1058         *page = -1;
1059 }
1060
1061 static gboolean
1062 location_in_text (EvView  *view,
1063                   gdouble  x,
1064                   gdouble  y)
1065 {
1066         GdkRegion *region;
1067         gint page = -1;
1068         gint x_offset = 0, y_offset = 0;
1069
1070         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1071
1072         if (page == -1)
1073                 return FALSE;
1074
1075         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1076
1077         if (region)
1078                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1079         else
1080                 return FALSE;
1081 }
1082
1083 static int
1084 ev_view_get_width (EvView *view)
1085 {
1086         return GTK_WIDGET (view)->allocation.width;
1087 }
1088
1089 static int
1090 ev_view_get_height (EvView *view)
1091 {
1092         return GTK_WIDGET (view)->allocation.height;
1093 }
1094
1095 /*** Hyperref ***/
1096 static EvLink *
1097 get_link_at_location (EvView  *view,
1098                       gdouble  x,
1099                       gdouble  y)
1100 {
1101         gint page = -1;
1102         gint x_offset = 0, y_offset = 0;
1103         GList *link_mapping;
1104
1105         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1106
1107         if (page == -1)
1108                 return NULL;
1109
1110         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1111
1112         if (link_mapping)
1113                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
1114         else
1115                 return NULL;
1116 }
1117
1118 static void
1119 goto_fitr_link (EvView *view, EvLink *link)
1120 {
1121         GdkPoint view_point;
1122         EvPoint doc_point;
1123         int doc_width, doc_height, page;
1124         double zoom;
1125
1126         page = ev_link_get_page (link);
1127         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1128
1129         doc_point.x = ev_link_get_left (link);
1130         doc_point.y = ev_link_get_top (link);
1131         doc_point_to_view_point (view, page, &doc_point, &view_point);
1132
1133         zoom = zoom_for_size_best_fit (ev_link_get_right (link) - ev_link_get_left (link),
1134                                        ev_link_get_top (link) - ev_link_get_bottom (link),
1135                                        ev_view_get_width (view),
1136                                        ev_view_get_height (view), 0, 0);
1137
1138         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1139         ev_view_set_zoom (view, zoom, FALSE);
1140         ev_page_cache_set_current_page (view->page_cache, page);
1141         gtk_adjustment_set_value (view->hadjustment, view_point.x);
1142 }
1143
1144 static void
1145 goto_fitv_link (EvView *view, EvLink *link)
1146 {
1147         GdkPoint view_point;
1148         EvPoint doc_point;
1149         int doc_width, doc_height, page;
1150         double zoom;
1151
1152         page = ev_link_get_page (link);
1153         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1154
1155         doc_point.x = ev_link_get_left (link);
1156         doc_point.y = 0;
1157         doc_point_to_view_point (view, page, &doc_point, &view_point);
1158
1159         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1160                                          ev_view_get_width (view),
1161                                          ev_view_get_height (view), 0);
1162
1163         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1164         ev_view_set_zoom (view, zoom, FALSE);
1165         ev_page_cache_set_current_page (view->page_cache, page);
1166         gtk_adjustment_set_value (view->hadjustment, view_point.x);
1167 }
1168
1169 static void
1170 goto_fith_link (EvView *view, EvLink *link)
1171 {
1172         GdkPoint view_point;
1173         EvPoint doc_point;
1174         int doc_width, doc_height, page;
1175         double zoom;
1176
1177         page = ev_link_get_page (link);
1178         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1179
1180         doc_point.x = 0;
1181         doc_point.y = doc_height - ev_link_get_top (link);
1182         doc_point_to_view_point (view, page, &doc_point, &view_point);
1183
1184         zoom = zoom_for_size_fit_width (doc_width, ev_link_get_top (link),
1185                                         ev_view_get_width (view),
1186                                         ev_view_get_height (view), 0);
1187
1188         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1189         ev_view_set_zoom (view, zoom, FALSE);
1190         gtk_adjustment_set_value (view->vadjustment, view_point.y);
1191 }
1192
1193 static void
1194 goto_fit_link (EvView *view, EvLink *link)
1195 {
1196         double zoom;
1197         int doc_width, doc_height;
1198         int page;
1199
1200         page = ev_link_get_page (link);
1201         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1202
1203         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1204                                        ev_view_get_height (view), 0, 0);
1205
1206         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1207         ev_view_set_zoom (view, zoom, FALSE);
1208         ev_page_cache_set_current_page (view->page_cache, page);
1209 }
1210
1211 static void
1212 goto_xyz_link (EvView *view, EvLink *link)
1213 {
1214         GdkPoint view_point;
1215         EvPoint doc_point;
1216         int height, page;
1217         double zoom;
1218
1219         zoom = ev_link_get_zoom (link);
1220         page = ev_link_get_page (link);
1221         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, NULL, &height);
1222
1223         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1224         if (zoom != 0) {
1225                 ev_view_set_zoom (view, zoom, FALSE);
1226         }
1227
1228         doc_point.x = ev_link_get_left (link);
1229         doc_point.y = height - ev_link_get_top (link);
1230         doc_point_to_view_point (view, page, &doc_point, &view_point);
1231
1232         gtk_adjustment_set_value (view->hadjustment, view_point.x);
1233         gtk_adjustment_set_value (view->vadjustment, view_point.y);
1234 }
1235
1236 void
1237 ev_view_goto_link (EvView *view, EvLink *link)
1238 {
1239         EvLinkType type;
1240         int page;
1241
1242         type = ev_link_get_link_type (link);
1243
1244         switch (type) {
1245                 case EV_LINK_TYPE_TITLE:
1246                         break;
1247                 case EV_LINK_TYPE_PAGE:
1248                         page = ev_link_get_page (link);
1249                         ev_page_cache_set_current_page (view->page_cache, page);
1250                         break;
1251                 case EV_LINK_TYPE_PAGE_FIT:
1252                         goto_fit_link (view, link);
1253                         break;
1254                 case EV_LINK_TYPE_PAGE_FITH:
1255                         goto_fith_link (view, link);
1256                         break;
1257                 case EV_LINK_TYPE_PAGE_FITV:
1258                         goto_fitv_link (view, link);
1259                         break;
1260                 case EV_LINK_TYPE_PAGE_FITR:
1261                         goto_fitr_link (view, link);
1262                         break;
1263                 case EV_LINK_TYPE_PAGE_XYZ:
1264                         goto_xyz_link (view, link);
1265                         break;
1266                 case EV_LINK_TYPE_EXTERNAL_URI:
1267                 case EV_LINK_TYPE_LAUNCH:
1268                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, link);
1269                         break;
1270         }
1271 }
1272
1273 static char *
1274 tip_from_link (EvView *view, EvLink *link)
1275 {
1276         EvLinkType type;
1277         char *msg = NULL;
1278         char *page_label;
1279
1280         type = ev_link_get_link_type (link);
1281
1282         switch (type) {
1283                 case EV_LINK_TYPE_TITLE:
1284                         if (ev_link_get_title (link))
1285                                 msg = g_strdup (ev_link_get_title (link));
1286                         break;
1287                 case EV_LINK_TYPE_PAGE:
1288                 case EV_LINK_TYPE_PAGE_XYZ:
1289                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
1290                         msg = g_strdup_printf (_("Go to page %s"), page_label);
1291                         g_free (page_label);
1292                         break;
1293                 case EV_LINK_TYPE_EXTERNAL_URI:
1294                         msg = g_strdup (ev_link_get_uri (link));
1295                         break;
1296                 default:
1297                         break;
1298         }
1299
1300         return msg;
1301 }
1302
1303 static void
1304 handle_link_over_xy (EvView *view, gint x, gint y)
1305 {
1306         EvLink *link;
1307
1308         link = get_link_at_location (view, x + view->scroll_x, y + view->scroll_y);
1309
1310         if (view->link_tooltip == NULL) {
1311                 view->link_tooltip = ev_tooltip_new (GTK_WIDGET (view));
1312         }
1313
1314         if (view->hovered_link != link) {
1315                 view->hovered_link = link;
1316                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
1317         }
1318
1319         if (link) {
1320                 char *msg = tip_from_link (view, link);
1321
1322                 ev_tooltip_set_position (EV_TOOLTIP (view->link_tooltip), x, y);
1323                 ev_tooltip_set_text (EV_TOOLTIP (view->link_tooltip), msg);
1324                 ev_tooltip_activate (EV_TOOLTIP (view->link_tooltip));
1325                 g_free (msg);
1326
1327                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1328         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1329                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1330         } else {
1331                 ev_view_set_status (view, NULL);
1332                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1333                     view->cursor == EV_VIEW_CURSOR_IBEAM)
1334                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1335         }
1336         return;
1337 }
1338
1339 /*** GtkWidget implementation ***/
1340
1341 static void
1342 ev_view_size_request_continuous_dual_page (EvView         *view,
1343                                            GtkRequisition *requisition)
1344 {
1345         int max_width;
1346         gint n_pages;
1347         GtkBorder border;
1348
1349         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1350                                      view->scale, &max_width);
1351         compute_border (view, max_width, max_width, &border);
1352
1353         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
1354
1355         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
1356         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1357
1358         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1359                 requisition->width = 1;
1360         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1361                 requisition->width = 1;
1362                 /* FIXME: This could actually be set on one page docs or docs
1363                  * with a strange aspect ratio. */
1364                 /* requisition->height = 1;*/
1365         }
1366 }
1367
1368 static void
1369 ev_view_size_request_continuous (EvView         *view,
1370                                  GtkRequisition *requisition)
1371 {
1372         int max_width;
1373         int n_pages;
1374         GtkBorder border;
1375
1376
1377         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1378                                      view->scale, &max_width);
1379         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1380         compute_border (view, max_width, max_width, &border);
1381
1382         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
1383         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1384
1385         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1386                 requisition->width = 1;
1387         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1388                 requisition->width = 1;
1389                 /* FIXME: This could actually be set on one page docs or docs
1390                  * with a strange aspect ratio. */
1391                 /* requisition->height = 1;*/
1392         }
1393 }
1394
1395 static void
1396 ev_view_size_request_dual_page (EvView         *view,
1397                                 GtkRequisition *requisition)
1398 {
1399         GtkBorder border;
1400         gint width, height;
1401
1402         /* Find the largest of the two. */
1403         ev_page_cache_get_size (view->page_cache,
1404                                 view->current_page,
1405                                 view->rotation,
1406                                 view->scale,
1407                                 &width, &height);
1408         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1409                 gint width_2, height_2;
1410                 ev_page_cache_get_size (view->page_cache,
1411                                         view->current_page + 1,
1412                                         view->rotation,
1413                                         view->scale,
1414                                         &width_2, &height_2);
1415                 if (width_2 > width) {
1416                         width = width_2;
1417                         height = height_2;
1418                 }
1419         }
1420         compute_border (view, width, height, &border);
1421
1422         requisition->width = ((width + border.left + border.right) * 2) +
1423                 (view->spacing * 3);
1424         requisition->height = (height + border.top + border.bottom) +
1425                 (view->spacing * 2);
1426
1427         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1428                 requisition->width = 1;
1429         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1430                 requisition->width = 1;
1431                 requisition->height = 1;
1432         }
1433 }
1434
1435 static void
1436 ev_view_size_request_single_page (EvView         *view,
1437                                   GtkRequisition *requisition)
1438 {
1439         GtkBorder border;
1440         gint width, height;
1441
1442         ev_page_cache_get_size (view->page_cache,
1443                                 view->current_page,
1444                                 view->rotation,
1445                                 view->scale,
1446                                 &width, &height);
1447         compute_border (view, width, height, &border);
1448
1449         requisition->width = width + border.left + border.right + (2 * view->spacing);
1450         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1451
1452         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1453                 requisition->width = 1;
1454                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1455         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1456                 requisition->width = 1;
1457                 requisition->height = 1;
1458         }
1459 }
1460
1461 static void
1462 ev_view_size_request (GtkWidget      *widget,
1463                       GtkRequisition *requisition)
1464 {
1465         EvView *view = EV_VIEW (widget);
1466
1467         if (view->document == NULL) {
1468                 requisition->width = 1;
1469                 requisition->height = 1;
1470                 return;
1471         }
1472
1473         if (view->presentation) {
1474                 requisition->width = 1;
1475                 requisition->height = 1;
1476                 return;
1477         }
1478
1479         if (view->continuous && view->dual_page)
1480                 ev_view_size_request_continuous_dual_page (view, requisition);
1481         else if (view->continuous)
1482                 ev_view_size_request_continuous (view, requisition);
1483         else if (view->dual_page)
1484                 ev_view_size_request_dual_page (view, requisition);
1485         else
1486                 ev_view_size_request_single_page (view, requisition);
1487 }
1488
1489 static void
1490 ev_view_size_allocate (GtkWidget      *widget,
1491                        GtkAllocation  *allocation)
1492 {
1493         EvView *view = EV_VIEW (widget);
1494
1495         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1496             view->sizing_mode == EV_SIZING_BEST_FIT) {
1497
1498                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1499
1500                 ev_view_size_request (widget, &widget->requisition);
1501         }
1502
1503         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1504         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1505
1506         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1507         view->pending_resize = FALSE;
1508
1509         if (view->document)
1510                 view_update_range_and_current_page (view);
1511
1512         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1513 }
1514
1515 static void
1516 ev_view_realize (GtkWidget *widget)
1517 {
1518         EvView *view = EV_VIEW (widget);
1519         GdkWindowAttr attributes;
1520
1521         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1522
1523
1524         attributes.window_type = GDK_WINDOW_CHILD;
1525         attributes.wclass = GDK_INPUT_OUTPUT;
1526         attributes.visual = gtk_widget_get_visual (widget);
1527         attributes.colormap = gtk_widget_get_colormap (widget);
1528
1529         attributes.x = widget->allocation.x;
1530         attributes.y = widget->allocation.y;
1531         attributes.width = widget->allocation.width;
1532         attributes.height = widget->allocation.height;
1533         attributes.event_mask = GDK_EXPOSURE_MASK |
1534                                 GDK_BUTTON_PRESS_MASK |
1535                                 GDK_BUTTON_RELEASE_MASK |
1536                                 GDK_SCROLL_MASK |
1537                                 GDK_KEY_PRESS_MASK |
1538                                 GDK_POINTER_MOTION_MASK |
1539                                 GDK_ENTER_NOTIFY_MASK |
1540                                 GDK_LEAVE_NOTIFY_MASK;
1541
1542         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1543                                          &attributes,
1544                                          GDK_WA_X | GDK_WA_Y |
1545                                          GDK_WA_COLORMAP |
1546                                          GDK_WA_VISUAL);
1547         gdk_window_set_user_data (widget->window, widget);
1548         widget->style = gtk_style_attach (widget->style, widget->window);
1549
1550         if (view->presentation)
1551                 gdk_window_set_background (widget->window, &widget->style->black);
1552         else
1553                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1554 }
1555
1556 static gboolean
1557 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1558 {
1559         EvView *view = EV_VIEW (widget);
1560         guint state;
1561
1562         state = event->state & gtk_accelerator_get_default_mod_mask ();
1563
1564         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
1565                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1566
1567                 if (event->direction == GDK_SCROLL_UP ||
1568                     event->direction == GDK_SCROLL_LEFT) {
1569                         if (ev_view_can_zoom_in (view)) {
1570                                 ev_view_zoom_in (view);
1571                         }
1572                 } else {
1573                         if (ev_view_can_zoom_out (view)) {
1574                                 ev_view_zoom_out (view);
1575                         }
1576                 }
1577
1578                 return TRUE;
1579         }
1580
1581         /* Shift+Wheel scrolls the in the perpendicular direction */
1582         if (state & GDK_SHIFT_MASK) {
1583                 if (event->direction == GDK_SCROLL_UP)
1584                         event->direction = GDK_SCROLL_LEFT;
1585                 if (event->direction == GDK_SCROLL_LEFT)
1586                         event->direction = GDK_SCROLL_UP;
1587                 if (event->direction == GDK_SCROLL_DOWN)
1588                         event->direction = GDK_SCROLL_RIGHT;
1589                 if (event->direction == GDK_SCROLL_RIGHT)
1590                         event->direction = GDK_SCROLL_DOWN;
1591
1592                 event->state &= ~GDK_SHIFT_MASK;
1593                 state &= ~GDK_SHIFT_MASK;
1594         }
1595
1596         if (state == 0 && view->presentation) {
1597                 switch (event->direction) {
1598                 case GDK_SCROLL_DOWN:
1599                 case GDK_SCROLL_RIGHT:
1600                         ev_view_next_page (view);
1601                         break;
1602                 case GDK_SCROLL_UP:
1603                 case GDK_SCROLL_LEFT:
1604                         ev_view_previous_page (view);
1605                         break;
1606                 }
1607
1608                 return TRUE;
1609         }
1610
1611         return FALSE;
1612 }
1613
1614 static EvViewSelection *
1615 find_selection_for_page (EvView *view,
1616                          gint    page)
1617 {
1618         GList *list;
1619
1620         for (list = view->selection_info.selections; list != NULL; list = list->next) {
1621                 EvViewSelection *selection;
1622
1623                 selection = (EvViewSelection *) list->data;
1624
1625                 if (selection->page == page)
1626                         return selection;
1627         }
1628
1629         return NULL;
1630 }
1631
1632 static gboolean
1633 ev_view_expose_event (GtkWidget      *widget,
1634                       GdkEventExpose *event)
1635 {
1636         EvView *view = EV_VIEW (widget);
1637         int i;
1638
1639         if (view->document == NULL)
1640                 return FALSE;
1641
1642         for (i = view->start_page; i <= view->end_page; i++) {
1643                 GdkRectangle page_area;
1644                 GtkBorder border;
1645
1646                 if (!get_page_extents (view, i, &page_area, &border))
1647                         continue;
1648
1649                 page_area.x -= view->scroll_x;
1650                 page_area.y -= view->scroll_y;
1651
1652                 draw_one_page (view, i, &page_area, &border, &(event->area));
1653
1654                 if (EV_IS_DOCUMENT_FIND (view->document))
1655                         highlight_find_results (view, i);
1656         }
1657
1658         return FALSE;
1659 }
1660
1661 static gboolean
1662 ev_view_button_press_event (GtkWidget      *widget,
1663                             GdkEventButton *event)
1664 {
1665         EvView *view = EV_VIEW (widget);
1666
1667         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1668                 gtk_widget_grab_focus (widget);
1669         }
1670
1671         view->pressed_button = event->button;
1672
1673         switch (event->button) {
1674                 case 1:
1675                         if (view->selection_info.selections) {
1676                                 clear_selection (view);
1677                                 gtk_widget_queue_draw (widget);
1678                         }
1679
1680                         view->selection_info.start.x = event->x + view->scroll_x;
1681                         view->selection_info.start.y = event->y + view->scroll_y;
1682                         return TRUE;
1683                 case 2:
1684                         /* use root coordinates as reference point because
1685                          * scrolling changes window relative coordinates */
1686                         view->drag_info.start.x = event->x_root;
1687                         view->drag_info.start.y = event->y_root;
1688                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1689                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1690
1691                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1692
1693                         return TRUE;
1694         }
1695
1696         return FALSE;
1697 }
1698
1699
1700 static gboolean
1701 selection_update_idle_cb (EvView *view)
1702 {
1703         GdkPoint point;
1704         point.x = view->motion_x;
1705         point.y = view->motion_y;
1706         compute_selections (view, &view->selection_info.start, &point);
1707
1708         view->selection_update_id = 0;
1709         return FALSE;
1710 }
1711
1712 static gboolean
1713 ev_view_motion_notify_event (GtkWidget      *widget,
1714                              GdkEventMotion *event)
1715 {
1716         EvView *view = EV_VIEW (widget);
1717
1718         if (!view->document)
1719                 return FALSE;
1720
1721         /* For the Evince 0.4.x release, we limit selection to un-rotated
1722          * documents only.
1723          */
1724         if (view->pressed_button == 1 &&
1725             view->rotation == 0) {
1726                 view->selection_info.in_selection = TRUE;
1727                 view->motion_x = event->x + view->scroll_x;
1728                 view->motion_y = event->y + view->scroll_y;
1729
1730                 /* Queue an idle to handle the motion.  We do this because
1731                  * handling any selection events in the motion could be slower
1732                  * than new motion events reach us.  We always put it in the
1733                  * idle to make sure we catch up and don't visibly lag the
1734                  * mouse. */
1735                 if (! view->selection_update_id)
1736                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
1737
1738                 return TRUE;
1739         } else if (view->pressed_button == 2) {
1740                 if (!view->drag_info.in_drag) {
1741                         gboolean start;
1742
1743                         start = gtk_drag_check_threshold (widget,
1744                                                           view->drag_info.start.x,
1745                                                           view->drag_info.start.y,
1746                                                           event->x_root,
1747                                                           event->y_root);
1748                         view->drag_info.in_drag = start;
1749                 }
1750
1751                 if (view->drag_info.in_drag) {
1752                         int dx, dy;
1753                         gdouble dhadj_value, dvadj_value;
1754
1755                         dx = event->x_root - view->drag_info.start.x;
1756                         dy = event->y_root - view->drag_info.start.y;
1757
1758                         dhadj_value = view->hadjustment->page_size *
1759                                       (gdouble)dx / widget->allocation.width;
1760                         dvadj_value = view->vadjustment->page_size *
1761                                       (gdouble)dy / widget->allocation.height;
1762
1763                         /* clamp scrolling to visible area */
1764                         gtk_adjustment_set_value (view->hadjustment,
1765                                                   MIN(view->drag_info.hadj - dhadj_value,
1766                                                       view->hadjustment->upper -
1767                                                       view->hadjustment->page_size));
1768                         gtk_adjustment_set_value (view->vadjustment,
1769                                                   MIN(view->drag_info.vadj - dvadj_value,
1770                                                       view->vadjustment->upper -
1771                                                       view->vadjustment->page_size));
1772
1773                         return TRUE;
1774                 }
1775         /* For the Evince 0.4.x release, we limit links to un-rotated documents
1776          * only.
1777          */
1778         } else if (view->pressed_button <= 0 &&
1779                    view->rotation == 0) {
1780                 handle_link_over_xy (view, event->x, event->y);
1781                 return TRUE;
1782         }
1783
1784         return FALSE;
1785 }
1786
1787 static gboolean
1788 ev_view_button_release_event (GtkWidget      *widget,
1789                               GdkEventButton *event)
1790 {
1791         EvView *view = EV_VIEW (widget);
1792         EvLink *link;
1793
1794         if (view->pressed_button == 2) {
1795                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1796         }
1797
1798         if (view->document) {
1799                 link = get_link_at_location (view, event->x + view->scroll_x,
1800                                              event->y + view->scroll_y);
1801         } else {
1802                 link = NULL;
1803         }
1804
1805         view->pressed_button = -1;
1806         view->drag_info.in_drag = FALSE;
1807
1808         if (view->selection_info.selections) {
1809                 ev_view_update_primary_selection (view);
1810         } else if (link) {
1811                 ev_view_goto_link (view, link);
1812         } else if (view->presentation) {
1813                 switch (event->button) {
1814                 case 1:
1815                         ev_view_next_page (view);
1816                         return TRUE;
1817                 case 3:
1818                         ev_view_previous_page (view);
1819                         return TRUE;
1820                 }
1821         }
1822
1823         return FALSE;
1824 }
1825
1826 static gint
1827 ev_view_focus_in (GtkWidget     *widget,
1828                   GdkEventFocus *event)
1829 {
1830         if (EV_VIEW (widget)->pixbuf_cache)
1831                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
1832         gtk_widget_queue_draw (widget);
1833
1834         return FALSE;
1835 }
1836
1837 static gint
1838 ev_view_focus_out (GtkWidget     *widget,
1839                      GdkEventFocus *event)
1840 {
1841         if (EV_VIEW (widget)->pixbuf_cache)
1842                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
1843         gtk_widget_queue_draw (widget);
1844
1845         return FALSE;
1846 }
1847
1848 static gboolean
1849 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
1850 {
1851         EvView *view = EV_VIEW (widget);
1852
1853         ev_view_set_status (view, NULL);
1854
1855         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1856             view->cursor == EV_VIEW_CURSOR_IBEAM)
1857                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1858
1859         if (view->link_tooltip) {
1860                 view->hovered_link = NULL;
1861                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
1862         }
1863
1864         return FALSE;
1865 }
1866
1867 static gboolean
1868 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
1869 {
1870         EvView *view = EV_VIEW (widget);
1871
1872         handle_link_over_xy (view, event->x, event->y);
1873
1874         return FALSE;
1875 }
1876
1877 static void
1878 ev_view_style_set (GtkWidget *widget,
1879                    GtkStyle  *old_style)
1880 {
1881         if (EV_VIEW (widget)->pixbuf_cache)
1882                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
1883
1884         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
1885 }
1886
1887
1888 /*** Drawing ***/
1889
1890 static guint32
1891 ev_gdk_color_to_rgb (const GdkColor *color)
1892 {
1893   guint32 result;
1894   result = (0xff0000 | (color->red & 0xff00));
1895   result <<= 8;
1896   result |= ((color->green & 0xff00) | (color->blue >> 8));
1897   return result;
1898 }
1899
1900 static void
1901 draw_rubberband (GtkWidget *widget, GdkWindow *window,
1902                  const GdkRectangle *rect, guchar alpha)
1903 {
1904         GdkGC *gc;
1905         GdkPixbuf *pixbuf;
1906         GdkColor *fill_color_gdk;
1907         guint fill_color;
1908
1909         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
1910         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
1911
1912         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
1913                                  rect->width, rect->height);
1914         gdk_pixbuf_fill (pixbuf, fill_color);
1915
1916         gdk_draw_pixbuf (window, NULL, pixbuf,
1917                          0, 0,
1918                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1919                          rect->width, rect->height,
1920                          GDK_RGB_DITHER_NONE,
1921                          0, 0);
1922
1923         g_object_unref (pixbuf);
1924
1925         gc = gdk_gc_new (window);
1926         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
1927         gdk_draw_rectangle (window, gc, FALSE,
1928                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1929                             rect->width - 1,
1930                             rect->height - 1);
1931         g_object_unref (gc);
1932
1933         gdk_color_free (fill_color_gdk);
1934 }
1935
1936
1937 static void
1938 highlight_find_results (EvView *view, int page)
1939 {
1940         EvDocumentFind *find;
1941         int i, results = 0;
1942
1943         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
1944
1945         find = EV_DOCUMENT_FIND (view->document);
1946
1947         results = ev_document_find_get_n_results (find, page);
1948
1949         for (i = 0; i < results; i++) {
1950                 EvRectangle rectangle;
1951                 GdkRectangle view_rectangle;
1952                 guchar alpha;
1953
1954                 if (i == view->find_result && page == view->find_page) {
1955                         alpha = 0x90;
1956                 } else {
1957                         alpha = 0x20;
1958                 }
1959
1960                 ev_document_find_get_result (find, page, i, &rectangle);
1961                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
1962                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
1963                                  &view_rectangle, alpha);
1964         }
1965 }
1966
1967 static void
1968 draw_loading_text (EvView       *view,
1969                    GdkRectangle *page_area,
1970                    GdkRectangle *expose_area)
1971 {
1972         PangoLayout *layout;
1973         PangoFontDescription *font_desc;
1974         PangoRectangle logical_rect;
1975         double real_scale;
1976         int target_width;
1977
1978         const char *loading_text = _("Loading...");
1979
1980         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
1981
1982         font_desc = pango_font_description_new ();
1983
1984
1985         /* We set the font to be 10 points, get the size, and scale appropriately */
1986         pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
1987         pango_layout_set_font_description (layout, font_desc);
1988         pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
1989
1990         /* Make sure we fit the middle of the page */
1991         target_width = MAX (page_area->width / 2, 1);
1992         real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
1993         pango_font_description_set_size (font_desc, (int)real_scale);
1994         pango_layout_set_font_description (layout, font_desc);
1995         pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
1996
1997         gtk_paint_layout (GTK_WIDGET (view)->style,
1998                           GTK_WIDGET (view)->window,
1999                           GTK_WIDGET_STATE (view),
2000                           FALSE,
2001                           page_area,
2002                           GTK_WIDGET (view),
2003                           NULL,
2004                           page_area->x + (target_width/2),
2005                           page_area->y + (page_area->height - logical_rect.height) / 2,
2006                           layout);
2007
2008         pango_font_description_free (font_desc);
2009         g_object_unref (layout);
2010 }
2011
2012 static void
2013 draw_one_page (EvView          *view,
2014                gint             page,
2015                GdkRectangle    *page_area,
2016                GtkBorder       *border,
2017                GdkRectangle    *expose_area)
2018 {
2019         gint width, height;
2020         GdkPixbuf *current_pixbuf;
2021         GdkRectangle overlap;
2022         GdkRectangle real_page_area;
2023         EvViewSelection *selection;
2024
2025         g_assert (view->document);
2026         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
2027                 return;
2028
2029         selection = find_selection_for_page (view, page);
2030         ev_page_cache_get_size (view->page_cache,
2031                                 page, view->rotation,
2032                                 view->scale,
2033                                 &width, &height);
2034         /* Render the document itself */
2035         real_page_area = *page_area;
2036
2037         real_page_area.x += border->left;
2038         real_page_area.y += border->top;
2039         real_page_area.width -= (border->left + border->right);
2040         real_page_area.height -= (border->top + border->bottom);
2041
2042         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
2043                                          GTK_WIDGET (view),
2044                                          page_area, border);
2045
2046         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
2047                 GdkPixbuf *selection_pixbuf = NULL;
2048                 GdkPixbuf *scaled_image;
2049                 GdkPixbuf *scaled_selection;
2050
2051                 current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
2052
2053                 /* Get the selection pixbuf iff we have something to draw */
2054                 if (current_pixbuf && view->selection_mode == EV_VIEW_SELECTION_TEXT && selection)
2055                         selection_pixbuf = ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
2056                                                                                  page,
2057                                                                                  view->scale,
2058                                                                                  NULL);
2059
2060                 if (current_pixbuf == NULL)
2061                         scaled_image = NULL;
2062                 else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
2063                          height == gdk_pixbuf_get_height (current_pixbuf))
2064                         scaled_image = g_object_ref (current_pixbuf);
2065                 else
2066                         /* FIXME: We don't want to scale the whole area, just the right
2067                          * area of it */
2068                         scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
2069                                                                 width, height,
2070                                                                 GDK_INTERP_NEAREST);
2071
2072                 if (selection_pixbuf == NULL)
2073                         scaled_selection = NULL;
2074                 else if (width == gdk_pixbuf_get_width (selection_pixbuf) &&
2075                          height == gdk_pixbuf_get_height (selection_pixbuf))
2076                         scaled_selection = g_object_ref (selection_pixbuf);
2077                 else
2078                         /* FIXME: We don't want to scale the whole area, just the right
2079                          * area of it */
2080                         scaled_selection = gdk_pixbuf_scale_simple (selection_pixbuf,
2081                                                                     width, height,
2082                                                                     GDK_INTERP_NEAREST);
2083
2084                 if (scaled_image) {
2085                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
2086                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
2087                                          scaled_image,
2088                                          overlap.x - real_page_area.x,
2089                                          overlap.y - real_page_area.y,
2090                                          overlap.x, overlap.y,
2091                                          overlap.width, overlap.height,
2092                                          GDK_RGB_DITHER_NORMAL,
2093                                          0, 0);
2094                         g_object_unref (scaled_image);
2095                 } else {
2096                         draw_loading_text (view,
2097                                            &real_page_area,
2098                                            expose_area);
2099                 }
2100
2101                 if (scaled_selection) {
2102                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
2103                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
2104                                          scaled_selection,
2105                                          overlap.x - real_page_area.x,
2106                                          overlap.y - real_page_area.y,
2107                                          overlap.x, overlap.y,
2108                                          overlap.width, overlap.height,
2109                                          GDK_RGB_DITHER_NORMAL,
2110                                          0, 0);
2111                         g_object_unref (scaled_selection);
2112                 }
2113         }
2114 }
2115
2116 /*** GObject functions ***/
2117
2118 static void
2119 ev_view_finalize (GObject *object)
2120 {
2121         EvView *view = EV_VIEW (object);
2122
2123         LOG ("Finalize");
2124
2125         g_free (view->status);
2126         g_free (view->find_status);
2127
2128         clear_selection (view);
2129
2130         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
2131 }
2132
2133 static void
2134 ev_view_destroy (GtkObject *object)
2135 {
2136         EvView *view = EV_VIEW (object);
2137
2138         if (view->document) {
2139                 g_object_unref (view->document);
2140                 view->document = NULL;
2141         }
2142
2143         if (view->pixbuf_cache) {
2144                 g_object_unref (view->pixbuf_cache);
2145                 view->pixbuf_cache = NULL;
2146         }
2147
2148         if (view->link_tooltip) {
2149                 gtk_widget_destroy (view->link_tooltip);
2150         }
2151
2152         ev_view_set_scroll_adjustments (view, NULL, NULL);
2153
2154         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
2155 }
2156
2157 static void
2158 ev_view_set_property (GObject      *object,
2159                       guint         prop_id,
2160                       const GValue *value,
2161                       GParamSpec   *pspec)
2162 {
2163         EvView *view = EV_VIEW (object);
2164
2165         switch (prop_id)
2166         {
2167         case PROP_CONTINUOUS:
2168                 ev_view_set_continuous (view, g_value_get_boolean (value));
2169                 break;
2170         case PROP_DUAL_PAGE:
2171                 ev_view_set_dual_page (view, g_value_get_boolean (value));
2172                 break;
2173         case PROP_FULLSCREEN:
2174                 ev_view_set_fullscreen (view, g_value_get_boolean (value));
2175                 break;
2176         case PROP_PRESENTATION:
2177                 ev_view_set_presentation (view, g_value_get_boolean (value));
2178                 break;
2179         case PROP_SIZING_MODE:
2180                 ev_view_set_sizing_mode (view, g_value_get_enum (value));
2181                 break;
2182         case PROP_ZOOM:
2183                 ev_view_set_zoom (view, g_value_get_double (value), FALSE);
2184                 break;
2185         case PROP_ROTATION:
2186                 ev_view_set_rotation (view, g_value_get_int (value));
2187                 break;
2188         default:
2189                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2190         }
2191 }
2192
2193 static void
2194 ev_view_get_property (GObject *object,
2195                       guint prop_id,
2196                       GValue *value,
2197                       GParamSpec *pspec)
2198 {
2199         EvView *view = EV_VIEW (object);
2200
2201         switch (prop_id)
2202         {
2203         case PROP_STATUS:
2204                 g_value_set_string (value, view->status);
2205                 break;
2206         case PROP_FIND_STATUS:
2207                 g_value_set_string (value, view->status);
2208                 break;
2209         case PROP_CONTINUOUS:
2210                 g_value_set_boolean (value, view->continuous);
2211                 break;
2212         case PROP_DUAL_PAGE:
2213                 g_value_set_boolean (value, view->dual_page);
2214                 break;
2215         case PROP_FULLSCREEN:
2216                 g_value_set_boolean (value, view->fullscreen);
2217                 break;
2218         case PROP_PRESENTATION:
2219                 g_value_set_boolean (value, view->presentation);
2220                 break;
2221         case PROP_SIZING_MODE:
2222                 g_value_set_enum (value, view->sizing_mode);
2223                 break;
2224         case PROP_ZOOM:
2225                 g_value_set_double (value, view->scale);
2226                 break;
2227         case PROP_ROTATION:
2228                 g_value_set_int (value, view->rotation);
2229                 break;
2230         default:
2231                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2232         }
2233 }
2234
2235 static void
2236 ev_view_class_init (EvViewClass *class)
2237 {
2238         GObjectClass *object_class = G_OBJECT_CLASS (class);
2239         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
2240         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
2241         GtkBindingSet *binding_set;
2242
2243         object_class->finalize = ev_view_finalize;
2244         object_class->set_property = ev_view_set_property;
2245         object_class->get_property = ev_view_get_property;
2246
2247         widget_class->expose_event = ev_view_expose_event;
2248         widget_class->button_press_event = ev_view_button_press_event;
2249         widget_class->motion_notify_event = ev_view_motion_notify_event;
2250         widget_class->button_release_event = ev_view_button_release_event;
2251         widget_class->focus_in_event = ev_view_focus_in;
2252         widget_class->focus_out_event = ev_view_focus_out;
2253         widget_class->size_request = ev_view_size_request;
2254         widget_class->size_allocate = ev_view_size_allocate;
2255         widget_class->realize = ev_view_realize;
2256         widget_class->scroll_event = ev_view_scroll_event;
2257         widget_class->enter_notify_event = ev_view_enter_notify_event;
2258         widget_class->leave_notify_event = ev_view_leave_notify_event;
2259         widget_class->style_set = ev_view_style_set;
2260         gtk_object_class->destroy = ev_view_destroy;
2261
2262         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
2263         class->binding_activated = ev_view_binding_activated;
2264
2265         widget_class->set_scroll_adjustments_signal =
2266             g_signal_new ("set-scroll-adjustments",
2267                           G_OBJECT_CLASS_TYPE (object_class),
2268                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2269                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
2270                           NULL, NULL,
2271                           ev_marshal_VOID__OBJECT_OBJECT,
2272                           G_TYPE_NONE, 2,
2273                           GTK_TYPE_ADJUSTMENT,
2274                           GTK_TYPE_ADJUSTMENT);
2275
2276         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
2277                          G_TYPE_FROM_CLASS (object_class),
2278                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2279                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
2280                          NULL, NULL,
2281                          ev_marshal_VOID__ENUM_BOOLEAN,
2282                          G_TYPE_NONE, 2,
2283                          GTK_TYPE_SCROLL_TYPE,
2284                          G_TYPE_BOOLEAN);
2285
2286         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
2287                          G_TYPE_FROM_CLASS (object_class),
2288                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2289                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
2290                          NULL, NULL,
2291                          ev_marshal_VOID__VOID,
2292                          G_TYPE_NONE, 0, G_TYPE_NONE);
2293         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
2294                          G_TYPE_FROM_CLASS (object_class),
2295                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2296                          G_STRUCT_OFFSET (EvViewClass, external_link),
2297                          NULL, NULL,
2298                          g_cclosure_marshal_VOID__OBJECT,
2299                          G_TYPE_NONE, 1,
2300                          G_TYPE_OBJECT);
2301
2302         g_object_class_install_property (object_class,
2303                                          PROP_STATUS,
2304                                          g_param_spec_string ("status",
2305                                                               "Status Message",
2306                                                               "The status message",
2307                                                               NULL,
2308                                                               G_PARAM_READABLE));
2309
2310         g_object_class_install_property (object_class,
2311                                          PROP_FIND_STATUS,
2312                                          g_param_spec_string ("find-status",
2313                                                               "Find Status Message",
2314                                                               "The find status message",
2315                                                               NULL,
2316                                                               G_PARAM_READABLE));
2317
2318         g_object_class_install_property (object_class,
2319                                          PROP_CONTINUOUS,
2320                                          g_param_spec_boolean ("continuous",
2321                                                                "Continuous",
2322                                                                "Continuous scrolling mode",
2323                                                                TRUE,
2324                                                                G_PARAM_READWRITE));
2325
2326         g_object_class_install_property (object_class,
2327                                          PROP_DUAL_PAGE,
2328                                          g_param_spec_boolean ("dual-page",
2329                                                                "Dual Page",
2330                                                                "Two pages visible at once",
2331                                                                FALSE,
2332                                                                G_PARAM_READWRITE));
2333         g_object_class_install_property (object_class,
2334                                          PROP_FULLSCREEN,
2335                                          g_param_spec_boolean ("fullscreen",
2336                                                                "Full Screen",
2337                                                                "Draw page in a fullscreen fashion",
2338                                                                FALSE,
2339                                                                G_PARAM_READWRITE));
2340         g_object_class_install_property (object_class,
2341                                          PROP_PRESENTATION,
2342                                          g_param_spec_boolean ("presentation",
2343                                                                "Presentation",
2344                                                                "Draw page in presentation mode",
2345                                                                TRUE,
2346                                                                G_PARAM_READWRITE));
2347
2348         g_object_class_install_property (object_class,
2349                                          PROP_SIZING_MODE,
2350                                          g_param_spec_enum ("sizing-mode",
2351                                                             "Sizing Mode",
2352                                                             "Sizing Mode",
2353                                                             EV_TYPE_SIZING_MODE,
2354                                                             EV_SIZING_FIT_WIDTH,
2355                                                             G_PARAM_READWRITE));
2356
2357         g_object_class_install_property (object_class,
2358                                          PROP_ZOOM,
2359                                          g_param_spec_double ("zoom",
2360                                                               "Zoom factor",
2361                                                                "Zoom factor",
2362                                                                MIN_SCALE,
2363                                                                MAX_SCALE,
2364                                                                1.0,
2365                                                                G_PARAM_READWRITE));
2366         g_object_class_install_property (object_class,
2367                                          PROP_ROTATION,
2368                                          g_param_spec_double ("rotation",
2369                                                               "Rotation",
2370                                                                "Rotation",
2371                                                                0,
2372                                                                360,
2373                                                                0,
2374                                                                G_PARAM_READWRITE));
2375
2376         binding_set = gtk_binding_set_by_class (class);
2377
2378         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
2379         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
2380         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
2381         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
2382 }
2383
2384 static void
2385 ev_view_init (EvView *view)
2386 {
2387         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
2388
2389         view->spacing = 5;
2390         view->scale = 1.0;
2391         view->current_page = 0;
2392         view->pressed_button = -1;
2393         view->cursor = EV_VIEW_CURSOR_NORMAL;
2394         view->drag_info.in_drag = FALSE;
2395         view->selection_info.in_selection = FALSE;
2396         view->selection_mode = EV_VIEW_SELECTION_TEXT;
2397         view->continuous = TRUE;
2398         view->dual_page = FALSE;
2399         view->presentation = FALSE;
2400         view->fullscreen = FALSE;
2401         view->sizing_mode = EV_SIZING_FIT_WIDTH;
2402         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2403 }
2404
2405 /*** Callbacks ***/
2406
2407 static void
2408 find_changed_cb (EvDocument *document, int page, EvView *view)
2409 {
2410         jump_to_find_page (view, EV_VIEW_FIND_NEXT);
2411         jump_to_find_result (view);
2412         update_find_status_message (view);
2413
2414         if (view->current_page == page)
2415                 gtk_widget_queue_draw (GTK_WIDGET (view));
2416 }
2417
2418 static void
2419 job_finished_cb (EvPixbufCache *pixbuf_cache,
2420                  EvView        *view)
2421 {
2422         gtk_widget_queue_draw (GTK_WIDGET (view));
2423 }
2424
2425 static void
2426 page_changed_cb (EvPageCache *page_cache,
2427                  int          new_page,
2428                  EvView      *view)
2429 {
2430         if (view->current_page != new_page) {
2431
2432                 view->current_page = new_page;
2433                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2434                 gtk_widget_queue_resize (GTK_WIDGET (view));
2435
2436                 if (EV_IS_DOCUMENT_FIND (view->document)) {
2437                         view->find_page = new_page;
2438                         view->find_result = 0;
2439                         update_find_status_message (view);
2440                 }
2441         }
2442 }
2443
2444 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
2445                                          EvView *view)
2446 {
2447         int dx = 0, dy = 0;
2448
2449         if (! GTK_WIDGET_REALIZED (view))
2450                 return;
2451
2452         if (view->hadjustment) {
2453                 dx = view->scroll_x - (int) view->hadjustment->value;
2454                 view->scroll_x = (int) view->hadjustment->value;
2455         } else {
2456                 view->scroll_x = 0;
2457         }
2458
2459         if (view->vadjustment) {
2460                 dy = view->scroll_y - (int) view->vadjustment->value;
2461                 view->scroll_y = (int) view->vadjustment->value;
2462         } else {
2463                 view->scroll_y = 0;
2464         }
2465
2466
2467         if (view->pending_resize)
2468                 gtk_widget_queue_draw (GTK_WIDGET (view));
2469         else
2470                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
2471
2472
2473         if (view->document)
2474                 view_update_range_and_current_page (view);
2475 }
2476
2477 GtkWidget*
2478 ev_view_new (void)
2479 {
2480         GtkWidget *view;
2481
2482         view = g_object_new (EV_TYPE_VIEW, NULL);
2483
2484         return view;
2485 }
2486
2487 static void
2488 setup_caches (EvView *view)
2489 {
2490         view->page_cache = ev_page_cache_get (view->document);
2491         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
2492         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
2493         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
2494 }
2495
2496 static void
2497 clear_caches (EvView *view)
2498 {
2499         if (view->pixbuf_cache) {
2500                 g_object_unref (view->pixbuf_cache);
2501                 view->pixbuf_cache = NULL;
2502         }
2503
2504         if (view->page_cache) {
2505                 view->page_cache = NULL;
2506         }
2507 }
2508
2509 void
2510 ev_view_set_document (EvView     *view,
2511                       EvDocument *document)
2512 {
2513         g_return_if_fail (EV_IS_VIEW (view));
2514
2515         if (document != view->document) {
2516                 clear_caches (view);
2517
2518                 if (view->document) {
2519                         g_signal_handlers_disconnect_by_func (view->document,
2520                                                               find_changed_cb,
2521                                                               view);
2522                         g_object_unref (view->document);
2523                         view->page_cache = NULL;
2524
2525                 }
2526
2527                 view->document = document;
2528                 view->find_page = 0;
2529                 view->find_result = 0;
2530
2531                 if (view->document) {
2532                         g_object_ref (view->document);
2533                         if (EV_IS_DOCUMENT_FIND (view->document)) {
2534                                 g_signal_connect (view->document,
2535                                                   "find_changed",
2536                                                   G_CALLBACK (find_changed_cb),
2537                                                   view);
2538                         }
2539
2540                         setup_caches (view);
2541                 }
2542
2543                 gtk_widget_queue_resize (GTK_WIDGET (view));
2544         }
2545 }
2546
2547 /*** Zoom and sizing mode ***/
2548
2549 #define EPSILON 0.0000001
2550 void
2551 ev_view_set_zoom (EvView   *view,
2552                   double    factor,
2553                   gboolean  relative)
2554 {
2555         double scale;
2556
2557         if (relative)
2558                 scale = view->scale * factor;
2559         else
2560                 scale = factor;
2561
2562         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
2563
2564         if (ABS (view->scale - scale) < EPSILON)
2565                 return;
2566
2567         view->scale = scale;
2568         view->pending_resize = TRUE;
2569
2570         gtk_widget_queue_resize (GTK_WIDGET (view));
2571
2572         g_object_notify (G_OBJECT (view), "zoom");
2573 }
2574
2575 double
2576 ev_view_get_zoom (EvView *view)
2577 {
2578         return view->scale;
2579 }
2580
2581 gboolean
2582 ev_view_get_continuous (EvView *view)
2583 {
2584         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2585
2586         return view->continuous;
2587 }
2588
2589 void
2590 ev_view_set_continuous (EvView   *view,
2591                         gboolean  continuous)
2592 {
2593         g_return_if_fail (EV_IS_VIEW (view));
2594
2595         continuous = continuous != FALSE;
2596
2597         if (view->continuous != continuous) {
2598                 view->continuous = continuous;
2599                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2600                 gtk_widget_queue_resize (GTK_WIDGET (view));
2601         }
2602
2603         g_object_notify (G_OBJECT (view), "continuous");
2604 }
2605
2606 gboolean
2607 ev_view_get_dual_page (EvView *view)
2608 {
2609         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2610
2611         return view->dual_page;
2612 }
2613
2614 void
2615 ev_view_set_dual_page (EvView   *view,
2616                        gboolean  dual_page)
2617 {
2618         g_return_if_fail (EV_IS_VIEW (view));
2619
2620         dual_page = dual_page != FALSE;
2621
2622         if (view->dual_page == dual_page)
2623                 return;
2624
2625         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2626         view->dual_page = dual_page;
2627         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2628          * preload_cache_size to be 2 if dual_page is set.
2629          */
2630         gtk_widget_queue_resize (GTK_WIDGET (view));
2631
2632         g_object_notify (G_OBJECT (view), "dual-page");
2633 }
2634
2635 void
2636 ev_view_set_fullscreen (EvView   *view,
2637                          gboolean  fullscreen)
2638 {
2639         g_return_if_fail (EV_IS_VIEW (view));
2640
2641         fullscreen = fullscreen != FALSE;
2642
2643         if (view->fullscreen == fullscreen)
2644                 return;
2645
2646         view->fullscreen = fullscreen;
2647         gtk_widget_queue_resize (GTK_WIDGET (view));
2648
2649         g_object_notify (G_OBJECT (view), "fullscreen");
2650 }
2651
2652 gboolean
2653 ev_view_get_fullscreen (EvView *view)
2654 {
2655         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2656
2657         return view->fullscreen;
2658 }
2659
2660 void
2661 ev_view_set_presentation (EvView   *view,
2662                           gboolean  presentation)
2663 {
2664         g_return_if_fail (EV_IS_VIEW (view));
2665
2666         presentation = presentation != FALSE;
2667
2668         if (view->presentation == presentation)
2669                 return;
2670
2671         view->presentation = presentation;
2672         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2673         gtk_widget_queue_resize (GTK_WIDGET (view));
2674
2675         if (GTK_WIDGET_REALIZED (view)) {
2676                 if (view->presentation)
2677                         gdk_window_set_background (GTK_WIDGET(view)->window,
2678                                                    &GTK_WIDGET (view)->style->black);
2679                 else
2680                         gdk_window_set_background (GTK_WIDGET(view)->window,
2681                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
2682         }
2683
2684
2685         g_object_notify (G_OBJECT (view), "presentation");
2686 }
2687
2688 gboolean
2689 ev_view_get_presentation (EvView *view)
2690 {
2691         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2692
2693         return view->presentation;
2694 }
2695
2696 void
2697 ev_view_set_sizing_mode (EvView       *view,
2698                          EvSizingMode  sizing_mode)
2699 {
2700         g_return_if_fail (EV_IS_VIEW (view));
2701
2702         if (view->sizing_mode == sizing_mode)
2703                 return;
2704
2705         view->sizing_mode = sizing_mode;
2706         gtk_widget_queue_resize (GTK_WIDGET (view));
2707
2708         g_object_notify (G_OBJECT (view), "sizing-mode");
2709 }
2710
2711 EvSizingMode
2712 ev_view_get_sizing_mode (EvView *view)
2713 {
2714         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
2715
2716         return view->sizing_mode;
2717 }
2718
2719 gboolean
2720 ev_view_can_zoom_in (EvView *view)
2721 {
2722         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
2723 }
2724
2725 gboolean
2726 ev_view_can_zoom_out (EvView *view)
2727 {
2728         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
2729 }
2730
2731 void
2732 ev_view_zoom_in (EvView *view)
2733 {
2734         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2735
2736         view->pending_scroll = SCROLL_TO_CENTER;
2737         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
2738 }
2739
2740 void
2741 ev_view_zoom_out (EvView *view)
2742 {
2743         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2744
2745         view->pending_scroll = SCROLL_TO_CENTER;
2746         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
2747 }
2748
2749 void
2750 ev_view_rotate_right (EvView *view)
2751 {
2752         int rotation = view->rotation + 90;
2753
2754         if (rotation >= 360) {
2755                 rotation -= 360;
2756         }
2757
2758         ev_view_set_rotation (view, rotation);
2759 }
2760
2761 void
2762 ev_view_rotate_left (EvView *view)
2763 {
2764         int rotation = view->rotation - 90;
2765
2766         if (rotation < 0) {
2767                 rotation += 360;
2768         }
2769
2770         ev_view_set_rotation (view, rotation);
2771 }
2772
2773 void
2774 ev_view_set_rotation (EvView *view, int rotation)
2775 {
2776         view->rotation = rotation;
2777
2778         if (view->pixbuf_cache) {
2779                 ev_pixbuf_cache_clear (view->pixbuf_cache);
2780                 gtk_widget_queue_resize (GTK_WIDGET (view));
2781         }
2782
2783         if (rotation != 0)
2784                 clear_selection (view);
2785
2786         g_object_notify (G_OBJECT (view), "rotation");
2787 }
2788
2789 int
2790 ev_view_get_rotation (EvView *view)
2791 {
2792         return view->rotation;
2793 }
2794
2795 static double
2796 zoom_for_size_fit_width (int doc_width,
2797                          int doc_height,
2798                          int target_width,
2799                          int target_height,
2800                          int vsb_width)
2801 {
2802         double scale;
2803
2804         scale = (double)target_width / doc_width;
2805
2806         if (doc_height * scale > target_height)
2807                 scale = (double) (target_width - vsb_width) / doc_width;
2808
2809         return scale;
2810 }
2811
2812 static double
2813 zoom_for_size_fit_height (int doc_width,
2814                           int doc_height,
2815                           int target_width,
2816                           int target_height,
2817                           int vsb_height)
2818 {
2819         double scale;
2820
2821         scale = (double)target_height / doc_height;
2822
2823         if (doc_width * scale > target_width)
2824                 scale = (double) (target_height - vsb_height) / doc_height;
2825
2826         return scale;
2827 }
2828
2829 static double
2830 zoom_for_size_best_fit (int doc_width,
2831                         int doc_height,
2832                         int target_width,
2833                         int target_height,
2834                         int vsb_width,
2835                         int hsb_width)
2836 {
2837         double w_scale;
2838         double h_scale;
2839
2840         w_scale = (double)target_width / doc_width;
2841         h_scale = (double)target_height / doc_height;
2842
2843         if (doc_height * w_scale > target_height)
2844                 w_scale = (double) (target_width - vsb_width) / doc_width;
2845         if (doc_width * h_scale > target_width)
2846                 h_scale = (double) (target_height - hsb_width) / doc_height;
2847
2848         return MIN (w_scale, h_scale);
2849 }
2850
2851
2852 static void
2853 ev_view_zoom_for_size_presentation (EvView *view,
2854                                     int     width,
2855                                     int     height)
2856 {
2857         int doc_width, doc_height;
2858         gdouble scale;
2859
2860         ev_page_cache_get_size (view->page_cache,
2861                                 view->current_page,
2862                                 view->rotation,
2863                                 1.0,
2864                                 &doc_width,
2865                                 &doc_height);
2866         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
2867         ev_view_set_zoom (view, scale, FALSE);
2868 }
2869
2870 static void
2871 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
2872                            int     width,
2873                            int     height,
2874                            int     vsb_width,
2875                            int     hsb_height)
2876 {
2877         int doc_width, doc_height;
2878         GtkBorder border;
2879         gdouble scale;
2880
2881         ev_page_cache_get_max_width (view->page_cache,
2882                                      view->rotation,
2883                                      1.0,
2884                                      &doc_width);
2885         ev_page_cache_get_max_height (view->page_cache,
2886                                       view->rotation,
2887                                       1.0,
2888                                       &doc_height);
2889         compute_border (view, doc_width, doc_height, &border);
2890
2891         doc_width = doc_width * 2;
2892         width -= (2 * (border.left + border.right) + 3 * view->spacing);
2893         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2894
2895         /* FIXME: We really need to calculate the overall height here, not the
2896          * page height.  We assume there's always a vertical scrollbar for
2897          * now.  We need to fix this. */
2898         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2899                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2900         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2901                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2902         else
2903                 g_assert_not_reached ();
2904
2905         ev_view_set_zoom (view, scale, FALSE);
2906 }
2907
2908 static void
2909 ev_view_zoom_for_size_continuous (EvView *view,
2910                                   int     width,
2911                                   int     height,
2912                                   int     vsb_width,
2913                                   int     hsb_height)
2914 {
2915         int doc_width, doc_height;
2916         GtkBorder border;
2917         gdouble scale;
2918
2919         ev_page_cache_get_max_width (view->page_cache,
2920                                      view->rotation,
2921                                      1.0,
2922                                      &doc_width);
2923         ev_page_cache_get_max_height (view->page_cache,
2924                                       view->rotation,
2925                                       1.0,
2926                                       &doc_height);
2927         compute_border (view, doc_width, doc_height, &border);
2928
2929         width -= (border.left + border.right + 2 * view->spacing);
2930         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2931
2932         /* FIXME: We really need to calculate the overall height here, not the
2933          * page height.  We assume there's always a vertical scrollbar for
2934          * now.  We need to fix this. */
2935         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2936                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2937         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2938                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2939         else
2940                 g_assert_not_reached ();
2941
2942         ev_view_set_zoom (view, scale, FALSE);
2943 }
2944
2945 static void
2946 ev_view_zoom_for_size_dual_page (EvView *view,
2947                                  int     width,
2948                                  int     height,
2949                                  int     vsb_width,
2950                                  int     hsb_height)
2951 {
2952         GtkBorder border;
2953         gint doc_width, doc_height;
2954         gdouble scale;
2955         gint other_page;
2956
2957         other_page = view->current_page ^ 1;
2958
2959         /* Find the largest of the two. */
2960         ev_page_cache_get_size (view->page_cache,
2961                                 view->current_page,
2962                                 view->rotation,
2963                                 1.0,
2964                                 &doc_width, &doc_height);
2965
2966         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
2967                 gint width_2, height_2;
2968                 ev_page_cache_get_size (view->page_cache,
2969                                         other_page,
2970                                         view->rotation,
2971                                         1.0,
2972                                         &width_2, &height_2);
2973                 if (width_2 > doc_width)
2974                         doc_width = width_2;
2975                 if (height_2 > doc_height)
2976                         doc_height = height_2;
2977         }
2978         compute_border (view, doc_width, doc_height, &border);
2979
2980         doc_width = doc_width * 2;
2981         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
2982         height -= (border.top + border.bottom + 2 * view->spacing);
2983
2984         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2985                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2986         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2987                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2988         else
2989                 g_assert_not_reached ();
2990
2991         ev_view_set_zoom (view, scale, FALSE);
2992 }
2993
2994 static void
2995 ev_view_zoom_for_size_single_page (EvView *view,
2996                                    int     width,
2997                                    int     height,
2998                                    int     vsb_width,
2999                                    int     hsb_height)
3000 {
3001         int doc_width, doc_height;
3002         GtkBorder border;
3003         gdouble scale;
3004
3005         ev_page_cache_get_size (view->page_cache,
3006                                 view->current_page,
3007                                 view->rotation,
3008                                 1.0,
3009                                 &doc_width,
3010                                 &doc_height);
3011         /* Get an approximate border */
3012         compute_border (view, width, height, &border);
3013
3014         width -= (border.left + border.right + 2 * view->spacing);
3015         height -= (border.top + border.bottom + 2 * view->spacing);
3016
3017         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3018                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
3019         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3020                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
3021         else
3022                 g_assert_not_reached ();
3023
3024         ev_view_set_zoom (view, scale, FALSE);
3025 }
3026
3027 void
3028 ev_view_set_zoom_for_size (EvView *view,
3029                            int     width,
3030                            int     height,
3031                            int     vsb_width,
3032                            int     hsb_height)
3033 {
3034         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3035                           view->sizing_mode == EV_SIZING_BEST_FIT);
3036         g_return_if_fail (width >= 0);
3037         g_return_if_fail (height >= 0);
3038
3039         if (view->document == NULL)
3040                 return;
3041
3042         if (view->presentation)
3043                 ev_view_zoom_for_size_presentation (view, width, height);
3044         else if (view->continuous && view->dual_page)
3045                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
3046         else if (view->continuous)
3047                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
3048         else if (view->dual_page)
3049                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
3050         else
3051                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
3052 }
3053
3054 /*** Status text messages ***/
3055
3056 const char *
3057 ev_view_get_status (EvView *view)
3058 {
3059         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
3060
3061         return view->status;
3062 }
3063
3064 static void
3065 ev_view_set_status (EvView *view, const char *message)
3066 {
3067         g_return_if_fail (EV_IS_VIEW (view));
3068
3069         if (message != view->status) {
3070                 g_free (view->status);
3071                 view->status = g_strdup (message);
3072                 g_object_notify (G_OBJECT (view), "status");
3073         }
3074 }
3075
3076 static void
3077 update_find_status_message (EvView *view)
3078 {
3079         char *message;
3080
3081         if (view->current_page == view->find_page) {
3082                 int results;
3083
3084                 results = ev_document_find_get_n_results
3085                                 (EV_DOCUMENT_FIND (view->document),
3086                                  view->current_page);
3087                 /* TRANS: Sometimes this could be better translated as
3088                    "%d hit(s) on this page".  Therefore this string
3089                    contains plural cases. */
3090                 message = g_strdup_printf (ngettext ("%d found on this page",
3091                                                      "%d found on this page",
3092                                                      results),
3093                                            results);
3094         } else {
3095                 double percent;
3096
3097                 percent = ev_document_find_get_progress
3098                                 (EV_DOCUMENT_FIND (view->document));
3099                 if (percent >= (1.0 - 1e-10)) {
3100                         message = g_strdup (_("Not found"));
3101                 } else {
3102                         message = g_strdup_printf (_("%3d%% remaining to search"),
3103                                                    (int) ((1.0 - percent) * 100));
3104                 }
3105
3106         }
3107         ev_view_set_find_status (view, message);
3108         g_free (message);
3109 }
3110
3111 const char *
3112 ev_view_get_find_status (EvView *view)
3113 {
3114         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
3115
3116         return view->find_status;
3117 }
3118
3119 static void
3120 ev_view_set_find_status (EvView *view, const char *message)
3121 {
3122         g_return_if_fail (EV_IS_VIEW (view));
3123
3124         g_free (view->find_status);
3125         view->find_status = g_strdup (message);
3126         g_object_notify (G_OBJECT (view), "find-status");
3127 }
3128
3129 /*** Find ***/
3130
3131 static void
3132 jump_to_find_result (EvView *view)
3133 {
3134         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3135         EvRectangle rect;
3136         GdkRectangle view_rect;
3137         int n_results;
3138         int page = view->find_page;
3139
3140         n_results = ev_document_find_get_n_results (find, page);
3141
3142         if (n_results > 0  && view->find_result < n_results) {
3143                 ev_document_find_get_result
3144                         (find, page, view->find_result, &rect);
3145
3146                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
3147                 ensure_rectangle_is_visible (view, &view_rect);
3148         }
3149 }
3150
3151 static void
3152 jump_to_find_page (EvView *view, EvViewFindDirection direction)
3153 {
3154         int n_pages, i;
3155
3156         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3157
3158         for (i = 0; i < n_pages; i++) {
3159                 int has_results;
3160                 int page;
3161
3162                 if (direction == EV_VIEW_FIND_NEXT)
3163                         page = view->find_page + i;
3164                 else
3165                         page = view->find_page - i;
3166
3167
3168                 if (page >= n_pages) {
3169                         page = page - n_pages;
3170                 }
3171                 if (page < 0)
3172                         page = page + n_pages;
3173
3174                 has_results = ev_document_find_page_has_results
3175                                 (EV_DOCUMENT_FIND (view->document), page);
3176                 if (has_results == -1) {
3177                         view->find_page = page;
3178                         break;
3179                 } else if (has_results == 1) {
3180                         ev_page_cache_set_current_page (view->page_cache, page);
3181                         break;
3182                 }
3183         }
3184 }
3185
3186 gboolean
3187 ev_view_can_find_next (EvView *view)
3188 {
3189         if (EV_IS_DOCUMENT_FIND (view->document)) {
3190                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3191                 int i, n_pages;
3192
3193                 n_pages = ev_page_cache_get_n_pages (view->page_cache);
3194                 for (i = 0; i < n_pages; i++) {
3195                         if (ev_document_find_get_n_results (find, i) > 0) {
3196                                 return TRUE;
3197                         }
3198                 }
3199         }
3200
3201         return FALSE;
3202 }
3203
3204 void
3205 ev_view_find_next (EvView *view)
3206 {
3207         int n_results, n_pages;
3208         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3209
3210         n_results = ev_document_find_get_n_results (find, view->current_page);
3211
3212         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3213
3214         view->find_result++;
3215
3216         if (view->find_result >= n_results) {
3217
3218                 view->find_result = 0;
3219                 view->find_page++;
3220                 if (view->find_page >= n_pages) {
3221                         view->find_page = 0;
3222                 }
3223
3224                 jump_to_find_page (view, EV_VIEW_FIND_NEXT);
3225                 jump_to_find_result (view);
3226         } else {
3227                 jump_to_find_result (view);
3228                 gtk_widget_queue_draw (GTK_WIDGET (view));
3229         }
3230 }
3231
3232 void
3233 ev_view_find_previous (EvView *view)
3234 {
3235         int n_results, n_pages;
3236         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3237         EvPageCache *page_cache;
3238
3239         page_cache = ev_page_cache_get (view->document);
3240
3241         n_results = ev_document_find_get_n_results (find, view->current_page);
3242
3243         n_pages = ev_page_cache_get_n_pages (page_cache);
3244
3245         view->find_result--;
3246
3247         if (view->find_result < 0) {
3248
3249                 view->find_page--;
3250                 if (view->find_page < 0) {
3251                         view->find_page = n_pages - 1;
3252                 }
3253
3254                 jump_to_find_page (view, EV_VIEW_FIND_PREV);
3255                 view->find_result = ev_document_find_get_n_results (find, view->current_page) - 1;
3256                 jump_to_find_result (view);
3257         } else {
3258                 jump_to_find_result (view);
3259                 gtk_widget_queue_draw (GTK_WIDGET (view));
3260         }
3261 }
3262
3263 /*** Selections ***/
3264
3265 /* compute_new_selection_rect/text calculates the area currently selected by
3266  * view_rect.  each handles a different mode;
3267  */
3268 static GList *
3269 compute_new_selection_rect (EvView       *view,
3270                             GdkPoint     *start,
3271                             GdkPoint     *stop)
3272 {
3273         GdkRectangle view_rect;
3274         int n_pages, i;
3275         GList *list = NULL;
3276
3277         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
3278
3279         view_rect.x = MIN (start->x, stop->x);
3280         view_rect.y = MIN (start->y, stop->y);
3281         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
3282         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
3283
3284         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3285
3286         for (i = 0; i < n_pages; i++) {
3287                 GdkRectangle page_area;
3288                 GtkBorder border;
3289
3290                 if (get_page_extents (view, i, &page_area, &border)) {
3291                         GdkRectangle overlap;
3292
3293                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
3294                                 EvViewSelection *selection;
3295
3296                                 selection = g_new0 (EvViewSelection, 1);
3297                                 selection->page = i;
3298                                 view_rect_to_doc_rect (view, &overlap, &page_area,
3299                                                        &(selection->rect));
3300
3301                                 list = g_list_append (list, selection);
3302                         }
3303                 }
3304         }
3305
3306         return list;
3307 }
3308
3309 static gboolean
3310 gdk_rectangle_point_in (GdkRectangle *rectangle,
3311                         GdkPoint     *point)
3312 {
3313         return rectangle->x <= point->x &&
3314                 rectangle->y <= point->y &&
3315                 point->x < rectangle->x + rectangle->width &&
3316                 point->y < rectangle->y + rectangle->height;
3317 }
3318
3319 static GList *
3320 compute_new_selection_text (EvView   *view,
3321                             GdkPoint *start,
3322                             GdkPoint *stop)
3323 {
3324         int n_pages, i, first, last;
3325         GList *list = NULL;
3326         EvViewSelection *selection;
3327         gint width, height;
3328         int start_page, end_page;
3329
3330         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
3331
3332         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3333
3334         /* First figure out the range of pages the selection
3335          * affects. */
3336         first = n_pages;
3337         last = 0;
3338         if (view->continuous) {
3339                 start_page = 0;
3340                 end_page = n_pages;
3341         } else if (view->dual_page) {
3342                 start_page = view->start_page;
3343                 end_page = view->end_page + 1;
3344         } else {
3345                 start_page = view->current_page;
3346                 end_page = view->current_page + 1;
3347         }
3348
3349         for (i = start_page; i < end_page; i++) {
3350                 GdkRectangle page_area;
3351                 GtkBorder border;
3352
3353                 get_page_extents (view, i, &page_area, &border);
3354                 if (gdk_rectangle_point_in (&page_area, start) ||
3355                     gdk_rectangle_point_in (&page_area, stop)) {
3356                         if (first == n_pages)
3357                                 first = i;
3358                         last = i;
3359                 }
3360
3361         }
3362
3363
3364
3365         /* Now create a list of EvViewSelection's for the affected
3366          * pages.  This could be an empty list, a list of just one
3367          * page or a number of pages.*/
3368         for (i = first; i < last + 1; i++) {
3369                 GdkRectangle page_area;
3370                 GtkBorder border;
3371                 GdkPoint *point;
3372
3373                 ev_page_cache_get_size (view->page_cache, i,
3374                                         view->rotation,
3375                                         1.0, &width, &height);
3376
3377                 selection = g_new0 (EvViewSelection, 1);
3378                 selection->page = i;
3379                 selection->rect.x1 = selection->rect.y1 = 0;
3380                 selection->rect.x2 = width;
3381                 selection->rect.y2 = height;
3382
3383                 get_page_extents (view, i, &page_area, &border);
3384
3385                 if (gdk_rectangle_point_in (&page_area, start))
3386                         point = start;
3387                 else
3388                         point = stop;
3389
3390                 if (i == first)
3391                         view_point_to_doc_point (view, point, &page_area,
3392                                                  &selection->rect.x1,
3393                                                  &selection->rect.y1);
3394
3395                 /* If the selection is contained within just one page,
3396                  * make sure we don't write 'start' into both points
3397                  * in selection->rect. */
3398                 if (first == last)
3399                         point = stop;
3400
3401                 if (i == last)
3402                         view_point_to_doc_point (view, point, &page_area,
3403                                                  &selection->rect.x2,
3404                                                  &selection->rect.y2);
3405
3406                 list = g_list_append (list, selection);
3407         }
3408
3409         return list;
3410 }
3411
3412 /* This function takes the newly calculated list, and figures out which regions
3413  * have changed.  It then queues a redraw approporiately.
3414  */
3415 static void
3416 merge_selection_region (EvView *view,
3417                         GList  *new_list)
3418 {
3419         GList *old_list;
3420         GList *new_list_ptr, *old_list_ptr;
3421
3422         /* Update the selection */
3423         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
3424         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
3425         view->selection_info.selections = new_list;
3426         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
3427
3428         new_list_ptr = new_list;
3429         old_list_ptr = old_list;
3430
3431         while (new_list_ptr || old_list_ptr) {
3432                 EvViewSelection *old_sel, *new_sel;
3433                 int cur_page;
3434                 GdkRegion *region = NULL;
3435
3436                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
3437                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
3438
3439                 /* Assume that the lists are in order, and we run through them
3440                  * comparing them, one page at a time.  We come out with the
3441                  * first page we see. */
3442                 if (new_sel && old_sel) {
3443                         if (new_sel->page < old_sel->page) {
3444                                 new_list_ptr = new_list_ptr->next;
3445                                 old_sel = NULL;
3446                         } else if (new_sel->page > old_sel->page) {
3447                                 old_list_ptr = old_list_ptr->next;
3448                                 new_sel = NULL;
3449                         } else {
3450                                 new_list_ptr = new_list_ptr->next;
3451                                 old_list_ptr = old_list_ptr->next;
3452                         }
3453                 } else if (new_sel) {
3454                         new_list_ptr = new_list_ptr->next;
3455                 } else if (old_sel) {
3456                         old_list_ptr = old_list_ptr->next;
3457                 }
3458
3459                 g_assert (new_sel || old_sel);
3460
3461                 /* is the page we're looking at on the screen?*/
3462                 cur_page = new_sel ? new_sel->page : old_sel->page;
3463                 if (cur_page < view->start_page || cur_page > view->end_page)
3464                         continue;
3465
3466                 /* seed the cache with a new page.  We are going to need the new
3467                  * region too. */
3468                 if (new_sel) {
3469                         GdkRegion *tmp_region = NULL;
3470                         ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
3471                                                               cur_page,
3472                                                               view->scale,
3473                                                               &tmp_region);
3474                         if (tmp_region) {
3475                                 new_sel->covered_region = gdk_region_copy (tmp_region);
3476                         }
3477                 }
3478
3479                 /* Now we figure out what needs redrawing */
3480                 if (old_sel && new_sel) {
3481                         if (old_sel->covered_region &&
3482                             new_sel->covered_region) {
3483                                 /* We only want to redraw the areas that have
3484                                  * changed, so we xor the old and new regions
3485                                  * and redraw if it's different */
3486                                 region = gdk_region_copy (old_sel->covered_region);
3487                                 gdk_region_xor (region, new_sel->covered_region);
3488                                 if (gdk_region_empty (region)) {
3489                                         gdk_region_destroy (region);
3490                                         region = NULL;
3491                                 }
3492                         } else if (old_sel->covered_region) {
3493                                 region = gdk_region_copy (old_sel->covered_region);
3494                         } else if (new_sel->covered_region) {
3495                                 region = gdk_region_copy (new_sel->covered_region);
3496                         }
3497                 } else if (old_sel && !new_sel) {
3498                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
3499                                 region = gdk_region_copy (old_sel->covered_region);
3500                         }
3501                 } else if (!old_sel && new_sel) {
3502                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
3503                                 region = gdk_region_copy (new_sel->covered_region);
3504                         }
3505                 } else {
3506                         g_assert_not_reached ();
3507                 }
3508
3509                 /* Redraw the damaged region! */
3510                 if (region) {
3511                         GdkRectangle page_area;
3512                         GtkBorder border;
3513
3514                         get_page_extents (view, cur_page, &page_area, &border);
3515                         gdk_region_offset (region,
3516                                            page_area.x + border.left - view->scroll_x,
3517                                            page_area.y + border.top - view->scroll_y);
3518                         gdk_window_invalidate_region (GTK_WIDGET (view)->window, region, TRUE);
3519                         gdk_region_destroy (region);
3520                 }
3521         }
3522
3523         /* Free the old list, now that we're done with it. */
3524         g_list_foreach (old_list, (GFunc) selection_free, NULL);
3525 }
3526
3527 static void
3528 compute_selections (EvView   *view,
3529                     GdkPoint *start,
3530                     GdkPoint *stop)
3531 {
3532         GList *list;
3533
3534         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
3535                 list = compute_new_selection_rect (view, start, stop);
3536         else
3537                 list = compute_new_selection_text (view, start, stop);
3538         merge_selection_region (view, list);
3539 }
3540
3541 /* Free's the selection.  It's up to the caller to queue redraws if needed.
3542  */
3543 static void
3544 selection_free (EvViewSelection *selection)
3545 {
3546         if (selection->covered_region)
3547                 gdk_region_destroy (selection->covered_region);
3548         g_free (selection);
3549 }
3550
3551 static void
3552 clear_selection (EvView *view)
3553 {
3554         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
3555         view->selection_info.selections = NULL;
3556         view->selection_info.in_selection = FALSE;
3557 }
3558
3559
3560 void
3561 ev_view_select_all (EvView *view)
3562 {
3563         int n_pages, i;
3564
3565         /* Disable selection on rotated pages for the 0.4.0 series */
3566         if (view->rotation != 0)
3567                 return;
3568
3569         clear_selection (view);
3570
3571         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3572         for (i = 0; i < n_pages; i++) {
3573                 int width, height;
3574                 EvViewSelection *selection;
3575
3576                 ev_page_cache_get_size (view->page_cache,
3577                                         i,
3578                                         view->rotation,
3579                                         1.0, &width, &height);
3580
3581                 selection = g_new0 (EvViewSelection, 1);
3582                 selection->page = i;
3583                 selection->rect.x1 = selection->rect.y1 = 0;
3584                 selection->rect.x2 = width;
3585                 selection->rect.y2 = height;
3586
3587                 view->selection_info.selections = g_list_append (view->selection_info.selections, selection);
3588         }
3589
3590         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, view->selection_info.selections);
3591         gtk_widget_queue_draw (GTK_WIDGET (view));
3592 }
3593
3594 static char *
3595 get_selected_text (EvView *ev_view)
3596 {
3597         GString *text;
3598         GList *l;
3599
3600         text = g_string_new (NULL);
3601
3602         ev_document_doc_mutex_lock ();
3603
3604         for (l = ev_view->selection_info.selections; l != NULL; l = l->next) {
3605                 EvViewSelection *selection = (EvViewSelection *)l->data;
3606                 char *tmp;
3607
3608                 tmp = ev_document_get_text (ev_view->document,
3609                                             selection->page,
3610                                             &selection->rect);
3611                 g_string_append (text, tmp);
3612                 g_free (tmp);
3613         }
3614
3615         ev_document_doc_mutex_unlock ();
3616
3617         return g_string_free (text, FALSE);
3618 }
3619
3620 void
3621 ev_view_copy (EvView *ev_view)
3622 {
3623         GtkClipboard *clipboard;
3624         char *text;
3625
3626         if (!ev_document_can_get_text (ev_view->document)) {
3627                 return;
3628         }
3629
3630         text = get_selected_text (ev_view);
3631         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3632                                               GDK_SELECTION_CLIPBOARD);
3633         gtk_clipboard_set_text (clipboard, text, -1);
3634         g_free (text);
3635 }
3636
3637 static void
3638 ev_view_primary_get_cb (GtkClipboard     *clipboard,
3639                         GtkSelectionData *selection_data,
3640                         guint             info,
3641                         gpointer          data)
3642 {
3643         EvView *ev_view = EV_VIEW (data);
3644         char *text;
3645
3646         if (!ev_document_can_get_text (ev_view->document)) {
3647                 return;
3648         }
3649
3650         text = get_selected_text (ev_view);
3651         gtk_selection_data_set_text (selection_data, text, -1);
3652         g_free (text);
3653 }
3654
3655 static void
3656 ev_view_primary_clear_cb (GtkClipboard *clipboard,
3657                           gpointer      data)
3658 {
3659         EvView *view = EV_VIEW (data);
3660
3661         clear_selection (view);
3662 }
3663
3664 static void
3665 ev_view_update_primary_selection (EvView *ev_view)
3666 {
3667         GtkClipboard *clipboard;
3668
3669         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3670                                               GDK_SELECTION_PRIMARY);
3671
3672         if (ev_view->selection_info.selections) {
3673                 if (!gtk_clipboard_set_with_owner (clipboard,
3674                                                    targets,
3675                                                    G_N_ELEMENTS (targets),
3676                                                    ev_view_primary_get_cb,
3677                                                    ev_view_primary_clear_cb,
3678                                                    G_OBJECT (ev_view)))
3679                         ev_view_primary_clear_cb (clipboard, ev_view);
3680         } else {
3681                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
3682                         gtk_clipboard_clear (clipboard);
3683         }
3684 }
3685
3686 /*** Cursor operations ***/
3687
3688 static GdkCursor *
3689 ev_view_create_invisible_cursor(void)
3690 {
3691        GdkBitmap *empty;
3692        GdkColor black = { 0, 0, 0, 0 };
3693        static char bits[] = { 0x00 };
3694
3695        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
3696
3697        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
3698 }
3699
3700 static void
3701 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
3702 {
3703         GdkCursor *cursor = NULL;
3704         GdkDisplay *display;
3705         GtkWidget *widget;
3706
3707         if (view->cursor == new_cursor) {
3708                 return;
3709         }
3710
3711         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
3712         display = gtk_widget_get_display (widget);
3713         view->cursor = new_cursor;
3714
3715         switch (new_cursor) {
3716                 case EV_VIEW_CURSOR_NORMAL:
3717                         gdk_window_set_cursor (widget->window, NULL);
3718                         break;
3719                 case EV_VIEW_CURSOR_IBEAM:
3720                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
3721                         break;
3722                 case EV_VIEW_CURSOR_LINK:
3723                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
3724                         break;
3725                 case EV_VIEW_CURSOR_WAIT:
3726                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
3727                         break;
3728                 case EV_VIEW_CURSOR_HIDDEN:
3729                         cursor = ev_view_create_invisible_cursor ();
3730                         break;
3731                 case EV_VIEW_CURSOR_DRAG:
3732                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
3733                         break;
3734         }
3735
3736         if (cursor) {
3737                 gdk_window_set_cursor (widget->window, cursor);
3738                 gdk_cursor_unref (cursor);
3739                 gdk_flush();
3740         }
3741 }
3742
3743 void
3744 ev_view_hide_cursor (EvView *view)
3745 {
3746        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
3747 }
3748
3749 void
3750 ev_view_show_cursor (EvView *view)
3751 {
3752        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3753 }
3754
3755 gboolean
3756 ev_view_next_page (EvView *view)
3757 {
3758         int page;
3759
3760         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3761
3762         page = ev_page_cache_get_current_page (view->page_cache);
3763         page = ev_view_get_dual_page (view) ? page + 2 : page + 1;
3764
3765         if (page < ev_page_cache_get_n_pages (view->page_cache)) {
3766                 ev_page_cache_set_current_page (view->page_cache, page);
3767                 return TRUE;
3768         } else {
3769                 return FALSE;
3770         }
3771 }
3772
3773 gboolean
3774 ev_view_previous_page (EvView *view)
3775 {
3776         int page;
3777
3778         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3779
3780         page = ev_page_cache_get_current_page (view->page_cache);
3781         page = ev_view_get_dual_page (view) ? page - 2 : page - 1;
3782
3783         if (page >= 0) {
3784                 ev_page_cache_set_current_page (view->page_cache, page);
3785                 return TRUE;
3786         } else {
3787                 return FALSE;
3788         }
3789 }
3790
3791 /*** Enum description for usage in signal ***/
3792
3793 GType
3794 ev_sizing_mode_get_type (void)
3795 {
3796   static GType etype = 0;
3797   if (etype == 0) {
3798     static const GEnumValue values[] = {
3799       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
3800       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
3801       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
3802       { 0, NULL, NULL }
3803     };
3804     etype = g_enum_register_static ("EvSizingMode", values);
3805   }
3806   return etype;
3807 }