shell/ev-view.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *  Copyright (C) 2004 Red Hat, Inc
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include <math.h>
  22 #include <string.h>
  23 #include <gtk/gtkalignment.h>
  24 #include <glib/gi18n.h>
  25 #include <gtk/gtkbindings.h>
  26 #include <gtk/gtkselection.h>
  27 #include <gtk/gtkclipboard.h>
  28 #include <gdk/gdkkeysyms.h>
  29 #include <libgnomevfs/gnome-vfs-utils.h>
  30
  31 #include "ev-marshal.h"
  32 #include "ev-view.h"
  33 #include "ev-view-private.h"
  34 #include "ev-utils.h"
  35 #include "ev-selection.h"
  36 #include "ev-document-links.h"
  37 #include "ev-document-find.h"
  38 #include "ev-document-misc.h"
  39 #include "ev-debug.h"
  40 #include "ev-job-queue.h"
  41 #include "ev-page-cache.h"
  42 #include "ev-pixbuf-cache.h"
  43 #include "ev-tooltip.h"
  44
  45 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  46 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  47 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  48
  49
  50 enum {
  51         PROP_0,
  52         PROP_STATUS,
  53         PROP_FIND_STATUS,
  54         PROP_CONTINUOUS,
  55         PROP_DUAL_PAGE,
  56         PROP_FULLSCREEN,
  57         PROP_PRESENTATION,
  58         PROP_SIZING_MODE,
  59         PROP_ZOOM,
  60         PROP_ROTATION,
  61         PROP_HAS_SELECTION,
  62 };
  63
  64 enum {
  65         SIGNAL_BINDING_ACTIVATED,
  66         SIGNAL_ZOOM_INVALID,
  67         SIGNAL_EXTERNAL_LINK,
  68         SIGNAL_POPUP_MENU,
  69         N_SIGNALS,
  70 };
  71
  72 enum {
  73         TARGET_STRING,
  74         TARGET_TEXT,
  75         TARGET_COMPOUND_TEXT,
  76         TARGET_UTF8_STRING,
  77         TARGET_TEXT_BUFFER_CONTENTS
  78 };
  79
  80 static const GtkTargetEntry targets[] = {
  81         { "STRING", 0, TARGET_STRING },
  82         { "TEXT",   0, TARGET_TEXT },
  83         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  84         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  85 };
  86
  87 static guint signals[N_SIGNALS];
  88
  89 typedef enum {
  90         EV_VIEW_FIND_NEXT,
  91         EV_VIEW_FIND_PREV
  92 } EvViewFindDirection;
  93
  94 #define ZOOM_IN_FACTOR  1.2
  95 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  96
  97 #define MIN_SCALE 0.05409
  98 #define MAX_SCALE 4.0
  99
 100 #define SCROLL_TIME 150
 101
 102 /*** Scrolling ***/
 103 static void       scroll_to_current_page                     (EvView *view,
 104                                                               GtkOrientation orientation);
 105 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 106                                                               GtkAdjustment      *hadjustment,
 107                                                               GtkAdjustment      *vadjustment);
 108 static void       view_update_range_and_current_page         (EvView             *view);
 109 static void       set_scroll_adjustment                      (EvView             *view,
 110                                                               GtkOrientation      orientation,
 111                                                               GtkAdjustment      *adjustment);
 112 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 113                                                               GtkAdjustment      *hadjustment,
 114                                                               GtkAdjustment      *vadjustment);
 115 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 116                                                               guint               keyval,
 117                                                               GdkModifierType modifiers,
 118                                                               EvScrollType       scroll,
 119                                                               gboolean            horizontal);
 120 static void       ensure_rectangle_is_visible                (EvView             *view,
 121                                                               GdkRectangle       *rect);
 122
 123 /*** Geometry computations ***/
 124 static void       compute_border                             (EvView             *view,
 125                                                               int                 width,
 126                                                               int                 height,
 127                                                               GtkBorder          *border);
 128 static void       get_page_y_offset                          (EvView *view,
 129                                                               int page,
 130                                                               double zoom,
 131                                                               int *y_offset);
 132 static gboolean   get_page_extents                           (EvView             *view,
 133                                                               gint                page,
 134                                                               GdkRectangle       *page_area,
 135                                                               GtkBorder          *border);
 136 static void       view_rect_to_doc_rect                      (EvView             *view,
 137                                                               GdkRectangle       *view_rect,
 138                                                               GdkRectangle       *page_area,
 139                                                               EvRectangle        *doc_rect);
 140 static void       doc_rect_to_view_rect                      (EvView             *view,
 141                                                               int                 page,
 142                                                               EvRectangle        *doc_rect,
 143                                                               GdkRectangle       *view_rect);
 144 static void       find_page_at_location                      (EvView             *view,
 145                                                               gdouble             x,
 146                                                               gdouble             y,
 147                                                               gint               *page,
 148                                                               gint               *x_offset,
 149                                                               gint               *y_offset);
 150 static gboolean  doc_point_to_view_point                     (EvView       *view,
 151                                                               int           page,
 152                                                               EvPoint      *doc_point,
 153                                                               GdkPoint     *view_point);
 154 /*** Hyperrefs ***/
 155 static EvLink *   ev_view_get_link_at_location               (EvView  *view,
 156                                                               gdouble  x,
 157                                                               gdouble  y);
 158 static char*      tip_from_link                              (EvView             *view,
 159                                                               EvLink             *link);
 160 static void       handle_link_over_xy                        (EvView *view,
 161                                                               gint x,
 162                                                               gint y);
 163 /*** GtkWidget implementation ***/
 164 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 165                                                               GtkRequisition     *requisition);
 166 static void       ev_view_size_request_continuous            (EvView             *view,
 167                                                               GtkRequisition     *requisition);
 168 static void       ev_view_size_request_dual_page             (EvView             *view,
 169                                                               GtkRequisition     *requisition);
 170 static void       ev_view_size_request_single_page           (EvView             *view,
 171                                                               GtkRequisition     *requisition);
 172 static void       ev_view_size_request                       (GtkWidget          *widget,
 173                                                               GtkRequisition     *requisition);
 174 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 175                                                               GtkAllocation      *allocation);
 176 static void       ev_view_realize                            (GtkWidget          *widget);
 177 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 178                                                               GdkEventScroll     *event);
 179 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 180                                                               GdkEventExpose     *event);
 181 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 182 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 183                                                               GdkEventButton     *event);
 184 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 185                                                               GdkEventMotion     *event);
 186 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 187                                                               GdkEventButton     *event);
 188 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 189                                                               GdkEventCrossing   *event);
 190 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 191                                                               GdkEventCrossing   *event);
 192 static void       ev_view_style_set                          (GtkWidget          *widget,
 193                                                               GtkStyle           *old_style);
 194
 195 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 196
 197 /*** Drawing ***/
 198 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 199 static void       draw_rubberband                            (GtkWidget          *widget,
 200                                                               GdkWindow          *window,
 201                                                               const GdkRectangle *rect,
 202                                                               guchar              alpha);
 203 static void       highlight_find_results                     (EvView             *view,
 204                                                               int                 page);
 205 static void       draw_one_page                              (EvView             *view,
 206                                                               gint                page,
 207                                                               GdkRectangle       *page_area,
 208                                                               GtkBorder          *border,
 209                                                               GdkRectangle       *expose_area,
 210                                                               gboolean           *page_ready);
 211 static void       draw_loading_text                          (EvView             *view,
 212                                                               GdkRectangle       *page_area,
 213                                                               GdkRectangle       *expose_area);
 214
 215 /*** Callbacks ***/
 216 static void       find_changed_cb                            (EvDocument         *document,
 217                                                               int                 page,
 218                                                               EvView             *view);
 219 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 220                                                               EvView             *view);
 221 static void       page_changed_cb                            (EvPageCache        *page_cache,
 222                                                               int                 new_page,
 223                                                               EvView             *view);
 224 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 225                                                               EvView             *view);
 226
 227 /*** GObject ***/
 228 static void       ev_view_finalize                           (GObject            *object);
 229 static void       ev_view_destroy                            (GtkObject          *object);
 230 static void       ev_view_set_property                       (GObject            *object,
 231                                                               guint               prop_id,
 232                                                               const GValue       *value,
 233                                                               GParamSpec         *pspec);
 234 static void       ev_view_get_property                       (GObject            *object,
 235                                                               guint               prop_id,
 236                                                               GValue             *value,
 237                                                               GParamSpec         *pspec);
 238 static void       ev_view_class_init                         (EvViewClass        *class);
 239 static void       ev_view_init                               (EvView             *view);
 240
 241 /*** Zoom and sizing ***/
 242 static double   zoom_for_size_fit_width                      (int doc_width,
 243                                                               int doc_height,
 244                                                               int target_width,
 245                                                               int target_height,
 246                                                               int vsb_width);
 247 static double   zoom_for_size_fit_height                     (int doc_width,
 248                                                               int doc_height,
 249                                                               int target_width,
 250                                                               int target_height,
 251                                                               int vsb_height);
 252 static double   zoom_for_size_best_fit                       (int doc_width,
 253                                                               int doc_height,
 254                                                               int target_width,
 255                                                               int target_height,
 256                                                               int vsb_width,
 257                                                               int hsb_width);
 258 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 259                                                               int     width,
 260                                                               int     height);
 261 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 262                                                                 int     width,
 263                                                                 int     height,
 264                                                                 int     vsb_width,
 265                                                                 int     hsb_height);
 266 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 267                                                                 int     width,
 268                                                                 int     height,
 269                                                                 int     vsb_width,
 270                                                                 int     hsb_height);
 271 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 272                                                                 int     width,
 273                                                                 int     height,
 274                                                                 int     vsb_width,
 275                                                                 int     hsb_height);
 276 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 277                                                                 int     width,
 278                                                                 int     height,
 279                                                                 int     vsb_width,
 280                                                                 int     hsb_height);
 281 /*** Cursors ***/
 282 static GdkCursor* ev_view_create_invisible_cursor            (void);
 283 static void       ev_view_set_cursor                         (EvView             *view,
 284                                                               EvViewCursor        new_cursor);
 285
 286 /*** Status messages ***/
 287 static void       ev_view_set_status                         (EvView             *view,
 288                                                               const char         *message);
 289 static void       update_find_status_message                 (EvView             *view,
 290                                                               gboolean            this_page);
 291 static void       ev_view_set_find_status                    (EvView             *view,
 292                                                               const char         *message);
 293 /*** Find ***/
 294 static void       jump_to_find_result                        (EvView             *view);
 295 static void       jump_to_find_page                          (EvView             *view,
 296                                                               EvViewFindDirection direction,
 297                                                               gint                shift);
 298
 299 /*** Selection ***/
 300 static void       compute_selections                         (EvView             *view,
 301                                                               GdkPoint           *start,
 302                                                               GdkPoint           *stop);
 303 static void       clear_selection                            (EvView             *view);
 304 static void       selection_free                             (EvViewSelection    *selection);
 305 static char*      get_selected_text                          (EvView             *ev_view);
 306 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 307                                                               GtkSelectionData   *selection_data,
 308                                                               guint               info,
 309                                                               gpointer            data);
 310 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 311                                                               gpointer            data);
 312 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 313
 314
 315 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 316
 317 static void
 318 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 319 {
 320         GdkPoint view_point;
 321
 322         if (view->document == NULL) {
 323                 return;
 324         }
 325
 326         doc_point_to_view_point (view, view->current_page, &view->pending_point, &view_point);
 327
 328         if (orientation == GTK_ORIENTATION_VERTICAL) {
 329                 view->pending_point.y = 0;
 330         } else {
 331                 view->pending_point.x = 0;
 332         }
 333
 334         if (orientation == GTK_ORIENTATION_VERTICAL) {
 335                 if (view->continuous) {
 336                         gtk_adjustment_clamp_page (view->vadjustment,
 337                                                    view_point.y - view->spacing / 2,
 338                                                    view_point.y + view->vadjustment->page_size);
 339                 } else {
 340                         gtk_adjustment_set_value (view->vadjustment,
 341                                                   CLAMP (view_point.y,
 342                                                   view->vadjustment->lower,
 343                                                   view->vadjustment->upper -
 344                                                   view->vadjustment->page_size));
 345                 }
 346         } else {
 347                 if (view->dual_page) {
 348                         gtk_adjustment_clamp_page (view->hadjustment,
 349                                                    view_point.x,
 350                                                    view_point.x + view->hadjustment->page_size);
 351                 } else {
 352                         gtk_adjustment_set_value (view->hadjustment,
 353                                                   CLAMP (view_point.x,
 354                                                   view->hadjustment->lower,
 355                                                   view->hadjustment->upper -
 356                                                   view->hadjustment->page_size));
 357                 }
 358         }
 359 }
 360
 361 static void
 362 view_set_adjustment_values (EvView         *view,
 363                             GtkOrientation  orientation)
 364 {
 365         GtkWidget *widget = GTK_WIDGET (view);
 366         GtkAdjustment *adjustment;
 367         int requisition;
 368         int allocation;
 369
 370         double factor;
 371         gint new_value;
 372
 373         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 374                 requisition = widget->requisition.width;
 375                 allocation = widget->allocation.width;
 376                 adjustment = view->hadjustment;
 377         } else {
 378                 requisition = widget->requisition.height;
 379                 allocation = widget->allocation.height;
 380                 adjustment = view->vadjustment;
 381         }
 382
 383         if (!adjustment)
 384                 return;
 385
 386         factor = 1.0;
 387         switch (view->pending_scroll) {
 388                 case SCROLL_TO_KEEP_POSITION:
 389                         factor = (adjustment->value) / adjustment->upper;
 390                         break;
 391                 case SCROLL_TO_PAGE_POSITION:
 392                         break;
 393                 case SCROLL_TO_CENTER:
 394                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 395                         break;
 396         }
 397
 398         adjustment->page_size = allocation;
 399         adjustment->step_increment = allocation * 0.1;
 400         adjustment->page_increment = allocation * 0.9;
 401         adjustment->lower = 0;
 402         adjustment->upper = MAX (allocation, requisition);
 403
 404         /*
 405          * We add 0.5 to the values before to average out our rounding errors.
 406          */
 407         switch (view->pending_scroll) {
 408                 case SCROLL_TO_KEEP_POSITION:
 409                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 410                         gtk_adjustment_set_value (adjustment, (int)new_value);
 411                         break;
 412                 case SCROLL_TO_PAGE_POSITION:
 413                         scroll_to_current_page (view, orientation);
 414                         break;
 415                 case SCROLL_TO_CENTER:
 416                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 417                                            0, adjustment->upper - adjustment->page_size);
 418                         gtk_adjustment_set_value (adjustment, (int)new_value);
 419                         break;
 420         }
 421
 422         gtk_adjustment_changed (adjustment);
 423 }
 424
 425 static void
 426 view_update_range_and_current_page (EvView *view)
 427 {
 428         gint current_page;
 429         gint best_current_page = -1;
 430
 431         if (view->pending_scroll != SCROLL_TO_KEEP_POSITION)
 432                 return;
 433
 434         /* Presentation trumps all other modes */
 435         if (view->presentation) {
 436                 view->start_page = view->current_page;
 437                 view->end_page = view->current_page;
 438         } else if (view->continuous) {
 439                 GdkRectangle current_area, unused, page_area;
 440                 GtkBorder border;
 441                 gboolean found = FALSE;
 442                 gint area_max = -1, area;
 443                 int i;
 444
 445                 if (!(view->vadjustment && view->hadjustment))
 446                         return;
 447
 448                 current_area.x = view->hadjustment->value;
 449                 current_area.width = view->hadjustment->upper;
 450                 current_area.y = view->vadjustment->value;
 451                 current_area.height = view->vadjustment->page_size;
 452
 453                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 454
 455                         get_page_extents (view, i, &page_area, &border);
 456
 457                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 458                                 area = unused.width * unused.height;
 459
 460                                 if (!found) {
 461                                         area_max = area;
 462                                         view->start_page = i;
 463                                         found = TRUE;
 464                                         best_current_page = i;
 465                                 }
 466                                 if (area > area_max) {
 467                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 468                                         area_max = area;
 469                                 }
 470
 471                                 view->end_page = i;
 472                         } else if (found) {
 473                                 break;
 474                         }
 475                 }
 476
 477         } else if (view->dual_page) {
 478                 if (view->current_page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) {
 479                         view->start_page = view->current_page;
 480                         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 481                                 view->end_page = view->start_page + 1;
 482                         else
 483                                 view->end_page = view->start_page;
 484                 } else {
 485                         if (view->current_page < 1)
 486                                 view->start_page = view->current_page;
 487                         else
 488                                 view->start_page = view->current_page - 1;
 489                         view->end_page = view->current_page;
 490                 }
 491         } else {
 492                 view->start_page = view->current_page;
 493                 view->end_page = view->current_page;
 494         }
 495
 496         best_current_page = MAX (best_current_page, view->start_page);
 497         current_page = ev_page_cache_get_current_page (view->page_cache);
 498
 499         if (current_page != best_current_page) {
 500                 view->current_page = best_current_page;
 501                 ev_page_cache_set_current_page (view->page_cache, best_current_page);
 502         }
 503
 504         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 505                                         view->start_page,
 506                                         view->end_page,
 507                                         view->rotation,
 508                                         view->scale,
 509                                         view->selection_info.selections);
 510 }
 511
 512 static void
 513 set_scroll_adjustment (EvView *view,
 514                        GtkOrientation  orientation,
 515                        GtkAdjustment  *adjustment)
 516 {
 517         GtkAdjustment **to_set;
 518
 519         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 520                 to_set = &view->hadjustment;
 521         else
 522                 to_set = &view->vadjustment;
 523
 524         if (*to_set != adjustment) {
 525                 if (*to_set) {
 526                         g_signal_handlers_disconnect_by_func (*to_set,
 527                                                               (gpointer) on_adjustment_value_changed,
 528                                                               view);
 529                         g_object_unref (*to_set);
 530                 }
 531
 532                 *to_set = adjustment;
 533                 view_set_adjustment_values (view, orientation);
 534
 535                 if (*to_set) {
 536                         g_object_ref (*to_set);
 537                         g_signal_connect (*to_set, "value_changed",
 538                                           G_CALLBACK (on_adjustment_value_changed), view);
 539                 }
 540         }
 541 }
 542
 543 static void
 544 ev_view_set_scroll_adjustments (EvView *view,
 545                                 GtkAdjustment  *hadjustment,
 546                                 GtkAdjustment  *vadjustment)
 547 {
 548         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 549         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 550
 551         on_adjustment_value_changed (NULL, view);
 552 }
 553
 554 static void
 555 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 556                            guint           keyval,
 557                            GdkModifierType modifiers,
 558                            EvScrollType    scroll,
 559                            gboolean        horizontal)
 560 {
 561   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 562
 563   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 564                                 "binding_activated", 2,
 565                                 EV_TYPE_SCROLL_TYPE, scroll,
 566                                 G_TYPE_BOOLEAN, horizontal);
 567   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 568                                 "binding_activated", 2,
 569                                 EV_TYPE_SCROLL_TYPE, scroll,
 570                                 G_TYPE_BOOLEAN, horizontal);
 571 }
 572
 573 void
 574 ev_view_scroll (EvView        *view,
 575                 EvScrollType   scroll,
 576                 gboolean horizontal)
 577 {
 578         GtkAdjustment *adjustment;
 579         double value, increment;
 580         gboolean first_page = FALSE;
 581         gboolean last_page = FALSE;
 582
 583         view->jump_to_find_result = FALSE;
 584
 585         if (view->presentation) {
 586                 switch (scroll) {
 587                         case EV_SCROLL_PAGE_BACKWARD:
 588                         case EV_SCROLL_STEP_BACKWARD:
 589                                 ev_view_previous_page (view);
 590                                 break;
 591                         case EV_SCROLL_PAGE_FORWARD:
 592                         case EV_SCROLL_STEP_FORWARD:
 593                                 ev_view_next_page (view);
 594                                 break;
 595                         default:
 596                                 break;
 597                 }
 598                 return;
 599         }
 600
 601         /* Assign values for increment and vertical adjustment */
 602         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 603         increment = adjustment->page_size * 0.75;
 604         value = adjustment->value;
 605
 606         /* Assign boolean for first and last page */
 607         if (view->current_page == 0)
 608                 first_page = TRUE;
 609         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 610                 last_page = TRUE;
 611
 612         switch (scroll) {
 613                 case EV_SCROLL_PAGE_BACKWARD:
 614                         /* Do not jump backwards if at the first page */
 615                         if (value == (adjustment->lower) && first_page) {
 616                                 /* Do nothing */
 617                                 /* At the top of a page, assign the upper bound limit of previous page */
 618                         } else if (value == (adjustment->lower)) {
 619                                 value = adjustment->upper - adjustment->page_size;
 620                                 ev_view_previous_page (view);
 621                                 /* Jump to the top */
 622                         } else {
 623                                 value = MAX (value - increment, adjustment->lower);
 624                         }
 625                         break;
 626                 case EV_SCROLL_PAGE_FORWARD:
 627                         /* Do not jump forward if at the last page */
 628                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 629                                 /* Do nothing */
 630                         /* At the bottom of a page, assign the lower bound limit of next page */
 631                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 632                                 value = 0;
 633                                 ev_view_next_page (view);
 634                         /* Jump to the bottom */
 635                         } else {
 636                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 637                         }
 638                         break;
 639                 case EV_SCROLL_STEP_BACKWARD:
 640                         value -= adjustment->step_increment;
 641                         break;
 642                 case EV_SCROLL_STEP_FORWARD:
 643                         value += adjustment->step_increment;
 644                         break;
 645                 case EV_SCROLL_STEP_DOWN:
 646                         value -= adjustment->step_increment / 10;
 647                         break;
 648                 case EV_SCROLL_STEP_UP:
 649                         value += adjustment->step_increment / 10;
 650                         break;
 651                 default:
 652                         break;
 653         }
 654
 655         value = CLAMP (value, adjustment->lower,
 656                        adjustment->upper - adjustment->page_size);
 657
 658         gtk_adjustment_set_value (adjustment, value);
 659 }
 660
 661 #define MARGIN 5
 662
 663 static void
 664 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 665 {
 666         GtkWidget *widget = GTK_WIDGET (view);
 667         GtkAdjustment *adjustment;
 668         int value;
 669
 670         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
 671
 672         adjustment = view->vadjustment;
 673
 674         if (rect->y < adjustment->value) {
 675                 value = MAX (adjustment->lower, rect->y - MARGIN);
 676                 gtk_adjustment_set_value (view->vadjustment, value);
 677         } else if (rect->y + rect->height >
 678                    adjustment->value + widget->allocation.height) {
 679                 value = MIN (adjustment->upper, rect->y + rect->height -
 680                              widget->allocation.height + MARGIN);
 681                 gtk_adjustment_set_value (view->vadjustment, value);
 682         }
 683
 684         adjustment = view->hadjustment;
 685
 686         if (rect->x < adjustment->value) {
 687                 value = MAX (adjustment->lower, rect->x - MARGIN);
 688                 gtk_adjustment_set_value (view->hadjustment, value);
 689         } else if (rect->x + rect->height >
 690                    adjustment->value + widget->allocation.width) {
 691                 value = MIN (adjustment->upper, rect->x + rect->width -
 692                              widget->allocation.width + MARGIN);
 693                 gtk_adjustment_set_value (view->hadjustment, value);
 694         }
 695 }
 696
 697 /*** Geometry computations ***/
 698
 699 static void
 700 compute_border (EvView *view, int width, int height, GtkBorder *border)
 701 {
 702         if (view->presentation) {
 703                 border->left = 0;
 704                 border->right = 0;
 705                 border->top = 0;
 706                 border->bottom = 0;
 707         } else {
 708                 ev_document_misc_get_page_border_size (width, height, border);
 709         }
 710 }
 711
 712 static void
 713 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 714 {
 715         int max_width, offset;
 716         GtkBorder border;
 717
 718         g_return_if_fail (y_offset != NULL);
 719
 720         ev_page_cache_get_max_width (view->page_cache, view->rotation, zoom, &max_width);
 721
 722         compute_border (view, max_width, max_width, &border);
 723
 724         if (view->dual_page) {
 725                 ev_page_cache_get_height_to_page (view->page_cache, page,
 726                                                   view->rotation, zoom, NULL, &offset);
 727                 offset += ((page + ev_page_cache_get_dual_even_left (view->page_cache)) / 2 + 1) * view->spacing + ((page + ev_page_cache_get_dual_even_left (view->page_cache)) / 2 ) * (border.top + border.bottom);
 728         } else {
 729                 ev_page_cache_get_height_to_page (view->page_cache, page,
 730                                                   view->rotation, zoom, &offset, NULL);
 731                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 732         }
 733
 734         *y_offset = offset;
 735         return;
 736 }
 737
 738 static gboolean
 739 get_page_extents (EvView       *view,
 740                   gint          page,
 741                   GdkRectangle *page_area,
 742                   GtkBorder    *border)
 743 {
 744         GtkWidget *widget;
 745         int width, height;
 746
 747         widget = GTK_WIDGET (view);
 748
 749         /* Get the size of the page */
 750         ev_page_cache_get_size (view->page_cache, page,
 751                                 view->rotation,
 752                                 view->scale,
 753                                 &width, &height);
 754         compute_border (view, width, height, border);
 755         page_area->width = width + border->left + border->right;
 756         page_area->height = height + border->top + border->bottom;
 757
 758         if (view->presentation) {
 759                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 760                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 761         } else if (view->continuous) {
 762                 gint max_width;
 763                 gint x, y;
 764
 765                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 766                                              view->scale, &max_width);
 767                 max_width = max_width + border->left + border->right;
 768                 /* Get the location of the bounding box */
 769                 if (view->dual_page) {
 770                         x = view->spacing + ((page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? 0 : 1) * (max_width + view->spacing);
 771                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 772                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 773                                 x = x + (max_width - width - border->left - border->right);
 774                 } else {
 775                         x = view->spacing;
 776                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 777                 }
 778
 779                 get_page_y_offset (view, page, view->scale, &y);
 780
 781                 page_area->x = x;
 782                 page_area->y = y;
 783         } else {
 784                 gint x, y;
 785                 if (view->dual_page) {
 786                         gint width_2, height_2;
 787                         gint max_width = width;
 788                         gint max_height = height;
 789                         GtkBorder overall_border;
 790                         gint other_page;
 791
 792                         other_page = (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? page + 1: page - 1;
 793
 794                         /* First, we get the bounding box of the two pages */
 795                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)
 796                             && (0 <= other_page)) {
 797                                 ev_page_cache_get_size (view->page_cache,
 798                                                         other_page,
 799                                                         view->rotation,
 800                                                         view->scale,
 801                                                         &width_2, &height_2);
 802                                 if (width_2 > width)
 803                                         max_width = width_2;
 804                                 if (height_2 > height)
 805                                         max_height = height_2;
 806                         }
 807                         compute_border (view, max_width, max_height, &overall_border);
 808
 809                         /* Find the offsets */
 810                         x = view->spacing;
 811                         y = view->spacing;
 812
 813                         /* Adjust for being the left or right page */
 814                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 815                                 x = x + max_width - width;
 816                         else
 817                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 818
 819                         y = y + (max_height - height)/2;
 820
 821                         /* Adjust for extra allocation */
 822                         x = x + MAX (0, widget->allocation.width -
 823                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 824                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 825                 } else {
 826                         x = view->spacing;
 827                         y = view->spacing;
 828
 829                         /* Adjust for extra allocation */
 830                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 831                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 832                 }
 833
 834                 page_area->x = x;
 835                 page_area->y = y;
 836         }
 837
 838         return TRUE;
 839 }
 840
 841 static void
 842 view_point_to_doc_point (EvView *view,
 843                          GdkPoint *view_point,
 844                          GdkRectangle *page_area,
 845                          double  *doc_point_x,
 846                          double  *doc_point_y)
 847 {
 848         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 849         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 850 }
 851
 852 static void
 853 view_rect_to_doc_rect (EvView *view,
 854                        GdkRectangle *view_rect,
 855                        GdkRectangle *page_area,
 856                        EvRectangle  *doc_rect)
 857 {
 858         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 859         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 860         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 861         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 862 }
 863
 864 static gboolean
 865 doc_point_to_view_point (EvView       *view,
 866                          int           page,
 867                          EvPoint      *doc_point,
 868                          GdkPoint     *view_point)
 869 {
 870         GdkRectangle page_area;
 871         GtkBorder border;
 872         double x, y, view_x, view_y;
 873         int width, height;
 874
 875         ev_page_cache_get_size (view->page_cache, page,
 876                                 view->rotation,
 877                                 1.0,
 878                                 &width, &height);
 879
 880         if (view->rotation == 0) {
 881                 x = doc_point->x;
 882                 y = doc_point->y;
 883         } else if (view->rotation == 90) {
 884                 x = width - doc_point->y;
 885                 y = doc_point->x;
 886         } else if (view->rotation == 180) {
 887                 x = width - doc_point->x;
 888                 y = height - doc_point->y;
 889         } else if (view->rotation == 270) {
 890                 x = doc_point->y;
 891                 y = height - doc_point->x;
 892         } else {
 893                 g_assert_not_reached ();
 894         }
 895
 896         get_page_extents (view, page, &page_area, &border);
 897
 898         view_x = x * view->scale;
 899         view_y = y * view->scale;
 900         view_point->x = view_x + page_area.x;
 901         view_point->y = view_y + page_area.y;
 902
 903         return (view_x > 0 && view_x <= page_area.width &&
 904                 view_y > 0 && view_y <= page_area.height);
 905 }
 906
 907 static void
 908 doc_rect_to_view_rect (EvView       *view,
 909                        int           page,
 910                        EvRectangle  *doc_rect,
 911                        GdkRectangle *view_rect)
 912 {
 913         GdkRectangle page_area;
 914         GtkBorder border;
 915         double x, y, w, h;
 916         int width, height;
 917
 918         ev_page_cache_get_size (view->page_cache, page,
 919                                 view->rotation,
 920                                 1.0,
 921                                 &width, &height);
 922
 923         if (view->rotation == 0) {
 924                 x = doc_rect->x1;
 925                 y = doc_rect->y1;
 926                 w = doc_rect->x2 - doc_rect->x1;
 927                 h = doc_rect->y2 - doc_rect->y1;
 928         } else if (view->rotation == 90) {
 929                 x = width - doc_rect->y2;
 930                 y = doc_rect->x1;
 931                 w = doc_rect->y2 - doc_rect->y1;
 932                 h = doc_rect->x2 - doc_rect->x1;
 933         } else if (view->rotation == 180) {
 934                 x = width - doc_rect->x2;
 935                 y = height - doc_rect->y2;
 936                 w = doc_rect->x2 - doc_rect->x1;
 937                 h = doc_rect->y2 - doc_rect->y1;
 938         } else if (view->rotation == 270) {
 939                 x = doc_rect->y1;
 940                 y = height - doc_rect->x2;
 941                 w = doc_rect->y2 - doc_rect->y1;
 942                 h = doc_rect->x2 - doc_rect->x1;
 943         } else {
 944                 g_assert_not_reached ();
 945         }
 946
 947         get_page_extents (view, page, &page_area, &border);
 948
 949         view_rect->x = x * view->scale + page_area.x;
 950         view_rect->y = y * view->scale + page_area.y;
 951         view_rect->width = w * view->scale;
 952         view_rect->height = h * view->scale;
 953 }
 954
 955 static void
 956 find_page_at_location (EvView  *view,
 957                        gdouble  x,
 958                        gdouble  y,
 959                        gint    *page,
 960                        gint    *x_offset,
 961                        gint    *y_offset)
 962 {
 963         int i;
 964
 965         if (view->document == NULL)
 966                 return;
 967
 968         g_assert (page);
 969         g_assert (x_offset);
 970         g_assert (y_offset);
 971
 972         for (i = view->start_page; i <= view->end_page; i++) {
 973                 GdkRectangle page_area;
 974                 GtkBorder border;
 975
 976                 if (! get_page_extents (view, i, &page_area, &border))
 977                         continue;
 978
 979                 if ((x >= page_area.x + border.left) &&
 980                     (x < page_area.x + page_area.width - border.right) &&
 981                     (y >= page_area.y + border.top) &&
 982                     (y < page_area.y + page_area.height - border.bottom)) {
 983                         *page = i;
 984                         *x_offset = x - (page_area.x + border.left);
 985                         *y_offset = y - (page_area.y + border.top);
 986                         return;
 987                 }
 988         }
 989
 990         *page = -1;
 991 }
 992
 993 static gboolean
 994 location_in_text (EvView  *view,
 995                   gdouble  x,
 996                   gdouble  y)
 997 {
 998         GdkRegion *region;
 999         gint page = -1;
1000         gint x_offset = 0, y_offset = 0;
1001
1002         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1003
1004         if (page == -1)
1005                 return FALSE;
1006
1007         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1008
1009         if (region)
1010                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1011         else
1012                 return FALSE;
1013 }
1014
1015 static int
1016 ev_view_get_width (EvView *view)
1017 {
1018         return GTK_WIDGET (view)->allocation.width;
1019 }
1020
1021 static int
1022 ev_view_get_height (EvView *view)
1023 {
1024         return GTK_WIDGET (view)->allocation.height;
1025 }
1026
1027 static gboolean
1028 location_in_selected_text (EvView  *view,
1029                            gdouble  x,
1030                            gdouble  y)
1031 {
1032         gint page = -1;
1033         gint x_offset = 0, y_offset = 0;
1034         EvViewSelection *selection;
1035         GList *l = NULL;
1036
1037         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1038                 selection = (EvViewSelection *)l->data;
1039
1040                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1041
1042                 if (page != selection->page)
1043                         continue;
1044
1045                 if (selection->covered_region &&
1046                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1047                         return TRUE;
1048         }
1049
1050         return FALSE;
1051 }
1052
1053 /*** Hyperref ***/
1054 static EvLink *
1055 ev_view_get_link_at_location (EvView  *view,
1056                               gdouble  x,
1057                               gdouble  y)
1058 {
1059         gint page = -1;
1060         gint x_offset = 0, y_offset = 0;
1061         GList *link_mapping;
1062
1063         x += view->scroll_x;
1064         y += view->scroll_y;
1065
1066         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1067
1068         if (page == -1)
1069                 return NULL;
1070
1071         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1072
1073         if (link_mapping)
1074                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
1075         else
1076                 return NULL;
1077 }
1078
1079 static void
1080 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1081 {
1082         EvPoint doc_point;
1083         int page;
1084         double zoom;
1085
1086         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - ev_link_dest_get_left (dest),
1087                                        ev_link_dest_get_top (dest) - ev_link_dest_get_bottom (dest),
1088                                        ev_view_get_width (view),
1089                                        ev_view_get_height (view), 0, 0);
1090
1091         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1092         ev_view_set_zoom (view, zoom, FALSE);
1093
1094         page = ev_link_dest_get_page (dest);
1095         doc_point.x = ev_link_dest_get_left (dest);
1096         doc_point.y = ev_link_dest_get_top (dest);
1097
1098         view->current_page = page;
1099         view->pending_point = doc_point;
1100         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1101
1102         gtk_widget_queue_resize (GTK_WIDGET (view));
1103 }
1104
1105 static void
1106 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1107 {
1108         EvPoint doc_point;
1109         int doc_width, doc_height, page;
1110         double zoom;
1111
1112         page = ev_link_dest_get_page (dest);
1113         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1114
1115         doc_point.x = ev_link_dest_get_left (dest);
1116         doc_point.y = 0;
1117
1118         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1119                                          ev_view_get_width (view),
1120                                          ev_view_get_height (view), 0);
1121
1122         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1123         ev_view_set_zoom (view, zoom, FALSE);
1124
1125         view->current_page = page;
1126         view->pending_point = doc_point;
1127         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1128
1129         gtk_widget_queue_resize (GTK_WIDGET (view));
1130 }
1131
1132 static void
1133 goto_fith_dest (EvView *view, EvLinkDest *dest)
1134 {
1135         EvPoint doc_point;
1136         int doc_width, doc_height, page;
1137         double zoom;
1138
1139         page = ev_link_dest_get_page (dest);
1140         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1141
1142         doc_point.x = 0;
1143         doc_point.y = doc_height - ev_link_dest_get_top (dest);
1144
1145         zoom = zoom_for_size_fit_width (doc_width, ev_link_dest_get_top (dest),
1146                                         ev_view_get_width (view),
1147                                         ev_view_get_height (view), 0);
1148
1149         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1150         ev_view_set_zoom (view, zoom, FALSE);
1151
1152         view->current_page = page;
1153         view->pending_point = doc_point;
1154         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1155
1156         gtk_widget_queue_resize (GTK_WIDGET (view));
1157 }
1158
1159 static void
1160 goto_fit_dest (EvView *view, EvLinkDest *dest)
1161 {
1162         double zoom;
1163         int doc_width, doc_height;
1164         int page;
1165
1166         page = ev_link_dest_get_page (dest);
1167         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1168
1169         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1170                                        ev_view_get_height (view), 0, 0);
1171
1172         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1173         ev_view_set_zoom (view, zoom, FALSE);
1174
1175         view->current_page = page;
1176         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1177
1178         gtk_widget_queue_resize (GTK_WIDGET (view));
1179 }
1180
1181 static void
1182 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1183 {
1184         EvPoint doc_point;
1185         int height, page;
1186         double zoom;
1187
1188         zoom = ev_link_dest_get_zoom (dest);
1189         page = ev_link_dest_get_page (dest);
1190         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, NULL, &height);
1191
1192         if (zoom != 0) {
1193                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1194                 ev_view_set_zoom (view, zoom, FALSE);
1195         }
1196
1197         doc_point.x = ev_link_dest_get_left (dest);
1198         doc_point.y = height - ev_link_dest_get_top (dest);
1199
1200         view->current_page = page;
1201         view->pending_point = doc_point;
1202         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1203
1204         gtk_widget_queue_resize (GTK_WIDGET (view));
1205 }
1206
1207 static void
1208 goto_dest (EvView *view, EvLinkDest *dest)
1209 {
1210         EvLinkDestType type;
1211         int page, n_pages;
1212
1213         page = ev_link_dest_get_page (dest);
1214         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1215
1216         if (page < 0 || page >= n_pages)
1217                 return;
1218
1219         type = ev_link_dest_get_dest_type (dest);
1220
1221         switch (type) {
1222                 case EV_LINK_DEST_TYPE_PAGE:
1223                         ev_page_cache_set_current_page (view->page_cache, page);
1224                         break;
1225                 case EV_LINK_DEST_TYPE_FIT:
1226                         goto_fit_dest (view, dest);
1227                         break;
1228                 case EV_LINK_DEST_TYPE_FITH:
1229                         goto_fith_dest (view, dest);
1230                         break;
1231                 case EV_LINK_DEST_TYPE_FITV:
1232                         goto_fitv_dest (view, dest);
1233                         break;
1234                 case EV_LINK_DEST_TYPE_FITR:
1235                         goto_fitr_dest (view, dest);
1236                         break;
1237                 case EV_LINK_DEST_TYPE_XYZ:
1238                         goto_xyz_dest (view, dest);
1239                         break;
1240                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1241                         ev_page_cache_set_page_label (view->page_cache, ev_link_dest_get_page_label (dest));
1242                         break;
1243                 default:
1244                         g_assert_not_reached ();
1245         }
1246 }
1247
1248 void
1249 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1250 {
1251         EvLinkDestType type;
1252
1253         type = ev_link_dest_get_dest_type (dest);
1254
1255         if (type == EV_LINK_DEST_TYPE_NAMED) {
1256                 EvLinkDest  *dest2;
1257                 const gchar *named_dest;
1258
1259                 named_dest = ev_link_dest_get_named_dest (dest);
1260                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1261                                                           named_dest);
1262                 if (dest2) {
1263                         goto_dest (view, dest2);
1264                         g_object_unref (dest2);
1265                 }
1266
1267                 return;
1268         }
1269
1270         goto_dest (view, dest);
1271 }
1272
1273 void
1274 ev_view_handle_link (EvView *view, EvLink *link)
1275 {
1276         EvLinkAction    *action = NULL;
1277         EvLinkActionType type;
1278
1279         action = ev_link_get_action (link);
1280         if (!action)
1281                 return;
1282
1283         type = ev_link_action_get_action_type (action);
1284
1285         switch (type) {
1286                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1287                         EvLinkDest *dest;
1288
1289                         dest = ev_link_action_get_dest (action);
1290                         ev_view_goto_dest (view, dest);
1291                 }
1292                         break;
1293                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1294                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1295                 case EV_LINK_ACTION_TYPE_LAUNCH:
1296                 case EV_LINK_ACTION_TYPE_NAMED:
1297                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1298                         break;
1299         }
1300 }
1301
1302 static gchar *
1303 page_label_from_dest (EvView *view, EvLinkDest *dest)
1304 {
1305         EvLinkDestType type;
1306         gchar *msg = NULL;
1307
1308         type = ev_link_dest_get_dest_type (dest);
1309
1310         switch (type) {
1311                 case EV_LINK_DEST_TYPE_NAMED: {
1312                         EvLinkDest  *dest2;
1313                         const gchar *named_dest;
1314
1315                         named_dest = ev_link_dest_get_named_dest (dest);
1316                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1317                                                                   named_dest);
1318                         if (dest2) {
1319                                 msg = ev_page_cache_get_page_label (view->page_cache,
1320                                                                     ev_link_dest_get_page (dest2));
1321                                 g_object_unref (dest2);
1322                         }
1323                 }
1324
1325                         break;
1326                 default:
1327                         msg = ev_page_cache_get_page_label (view->page_cache,
1328                                                             ev_link_dest_get_page (dest));
1329         }
1330
1331         return msg;
1332 }
1333
1334 static char *
1335 tip_from_action_named (EvLinkAction *action)
1336 {
1337         const gchar *name = ev_link_action_get_name (action);
1338
1339         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1340                 return g_strdup (_("Go to first page"));
1341         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1342                 return g_strdup (_("Go to previous page"));
1343         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1344                 return g_strdup (_("Go to next page"));
1345         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1346                 return g_strdup (_("Go to last page"));
1347         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1348                 return g_strdup (_("Go to page"));
1349         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1350                 return g_strdup (_("Find"));
1351         }
1352
1353         return NULL;
1354 }
1355
1356 static char *
1357 tip_from_link (EvView *view, EvLink *link)
1358 {
1359         EvLinkAction *action;
1360         EvLinkActionType type;
1361         char *msg = NULL;
1362         char *page_label;
1363         const char *title;
1364
1365         action = ev_link_get_action (link);
1366         title = ev_link_get_title (link);
1367
1368         if (!action)
1369                 return title ? g_strdup (title) : NULL;
1370
1371         type = ev_link_action_get_action_type (action);
1372
1373         switch (type) {
1374                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1375                         page_label = page_label_from_dest (view,
1376                                                            ev_link_action_get_dest (action));
1377                         msg = g_strdup_printf (_("Go to page %s"), page_label);
1378                         g_free (page_label);
1379                         break;
1380                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1381                         if (title) {
1382                                 msg = g_strdup_printf (_("Go to %s on file %s"), title,
1383                                                        ev_link_action_get_filename (action));
1384                         } else {
1385                                 msg = g_strdup_printf (_("Go to file %s"),
1386                                                        ev_link_action_get_filename (action));
1387                         }
1388
1389                         break;
1390                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1391                         msg = g_strdup (ev_link_action_get_uri (action));
1392                         break;
1393                 case EV_LINK_ACTION_TYPE_LAUNCH:
1394                         msg = g_strdup_printf (_("Launch %s"),
1395                                                ev_link_action_get_filename (action));
1396                         break;
1397                 case EV_LINK_ACTION_TYPE_NAMED:
1398                         msg = tip_from_action_named (action);
1399                         break;
1400                 default:
1401                         if (title)
1402                                 msg = g_strdup (title);
1403                         break;
1404         }
1405
1406         return msg;
1407 }
1408
1409 static void
1410 handle_link_over_xy (EvView *view, gint x, gint y)
1411 {
1412         EvLink *link;
1413
1414         link = ev_view_get_link_at_location (view, x, y);
1415
1416         if (view->link_tooltip == NULL) {
1417                 view->link_tooltip = ev_tooltip_new (GTK_WIDGET (view));
1418         }
1419
1420         if (view->hovered_link != link) {
1421                 view->hovered_link = link;
1422                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
1423         }
1424
1425         if (link) {
1426                 char *msg = tip_from_link (view, link);
1427
1428                 if (msg && g_utf8_validate (msg, -1, NULL)) {
1429                         EvTooltip *tooltip = EV_TOOLTIP (view->link_tooltip);
1430
1431                         ev_tooltip_set_position (tooltip, x, y);
1432                         ev_tooltip_set_text (tooltip, msg);
1433                         ev_tooltip_activate (tooltip);
1434                 }
1435                 g_free (msg);
1436
1437                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1438         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1439                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1440         } else {
1441                 ev_view_set_status (view, NULL);
1442                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1443                     view->cursor == EV_VIEW_CURSOR_IBEAM)
1444                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1445         }
1446         return;
1447 }
1448
1449 /*** GtkWidget implementation ***/
1450
1451 static void
1452 ev_view_size_request_continuous_dual_page (EvView         *view,
1453                                            GtkRequisition *requisition)
1454 {
1455         int max_width;
1456         gint n_pages;
1457         GtkBorder border;
1458
1459         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1460                                      view->scale, &max_width);
1461         compute_border (view, max_width, max_width, &border);
1462
1463         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
1464
1465         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
1466         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1467
1468         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1469                 requisition->width = 1;
1470         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1471                 requisition->width = 1;
1472                 /* FIXME: This could actually be set on one page docs or docs
1473                  * with a strange aspect ratio. */
1474                 /* requisition->height = 1;*/
1475         }
1476 }
1477
1478 static void
1479 ev_view_size_request_continuous (EvView         *view,
1480                                  GtkRequisition *requisition)
1481 {
1482         int max_width;
1483         int n_pages;
1484         GtkBorder border;
1485
1486
1487         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1488                                      view->scale, &max_width);
1489         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1490         compute_border (view, max_width, max_width, &border);
1491
1492         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
1493         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1494
1495         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1496                 requisition->width = 1;
1497         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1498                 requisition->width = 1;
1499                 /* FIXME: This could actually be set on one page docs or docs
1500                  * with a strange aspect ratio. */
1501                 /* requisition->height = 1;*/
1502         }
1503 }
1504
1505 static void
1506 ev_view_size_request_dual_page (EvView         *view,
1507                                 GtkRequisition *requisition)
1508 {
1509         GtkBorder border;
1510         gint width, height;
1511
1512         /* Find the largest of the two. */
1513         ev_page_cache_get_size (view->page_cache,
1514                                 view->current_page,
1515                                 view->rotation,
1516                                 view->scale,
1517                                 &width, &height);
1518         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1519                 gint width_2, height_2;
1520                 ev_page_cache_get_size (view->page_cache,
1521                                         view->current_page + 1,
1522                                         view->rotation,
1523                                         view->scale,
1524                                         &width_2, &height_2);
1525                 if (width_2 > width) {
1526                         width = width_2;
1527                         height = height_2;
1528                 }
1529         }
1530         compute_border (view, width, height, &border);
1531
1532         requisition->width = ((width + border.left + border.right) * 2) +
1533                 (view->spacing * 3);
1534         requisition->height = (height + border.top + border.bottom) +
1535                 (view->spacing * 2);
1536
1537         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1538                 requisition->width = 1;
1539         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1540                 requisition->width = 1;
1541                 requisition->height = 1;
1542         }
1543 }
1544
1545 static void
1546 ev_view_size_request_single_page (EvView         *view,
1547                                   GtkRequisition *requisition)
1548 {
1549         GtkBorder border;
1550         gint width, height;
1551
1552         ev_page_cache_get_size (view->page_cache,
1553                                 view->current_page,
1554                                 view->rotation,
1555                                 view->scale,
1556                                 &width, &height);
1557         compute_border (view, width, height, &border);
1558
1559         requisition->width = width + border.left + border.right + (2 * view->spacing);
1560         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1561
1562         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1563                 requisition->width = 1;
1564                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1565         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1566                 requisition->width = 1;
1567                 requisition->height = 1;
1568         }
1569 }
1570
1571 static void
1572 ev_view_size_request (GtkWidget      *widget,
1573                       GtkRequisition *requisition)
1574 {
1575         EvView *view = EV_VIEW (widget);
1576
1577         if (view->document == NULL) {
1578                 requisition->width = 1;
1579                 requisition->height = 1;
1580                 return;
1581         }
1582
1583         if (view->presentation) {
1584                 requisition->width = 1;
1585                 requisition->height = 1;
1586                 return;
1587         }
1588
1589         if (view->continuous && view->dual_page)
1590                 ev_view_size_request_continuous_dual_page (view, requisition);
1591         else if (view->continuous)
1592                 ev_view_size_request_continuous (view, requisition);
1593         else if (view->dual_page)
1594                 ev_view_size_request_dual_page (view, requisition);
1595         else
1596                 ev_view_size_request_single_page (view, requisition);
1597 }
1598
1599 static void
1600 ev_view_size_allocate (GtkWidget      *widget,
1601                        GtkAllocation  *allocation)
1602 {
1603         EvView *view = EV_VIEW (widget);
1604
1605         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1606             view->sizing_mode == EV_SIZING_BEST_FIT) {
1607
1608                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1609
1610                 ev_view_size_request (widget, &widget->requisition);
1611         }
1612
1613         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1614         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1615
1616         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1617         view->pending_resize = FALSE;
1618
1619         if (view->document)
1620                 view_update_range_and_current_page (view);
1621
1622         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1623 }
1624
1625 static void
1626 ev_view_realize (GtkWidget *widget)
1627 {
1628         EvView *view = EV_VIEW (widget);
1629         GdkWindowAttr attributes;
1630
1631         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1632
1633
1634         attributes.window_type = GDK_WINDOW_CHILD;
1635         attributes.wclass = GDK_INPUT_OUTPUT;
1636         attributes.visual = gtk_widget_get_visual (widget);
1637         attributes.colormap = gtk_widget_get_colormap (widget);
1638
1639         attributes.x = widget->allocation.x;
1640         attributes.y = widget->allocation.y;
1641         attributes.width = widget->allocation.width;
1642         attributes.height = widget->allocation.height;
1643         attributes.event_mask = GDK_EXPOSURE_MASK |
1644                                 GDK_BUTTON_PRESS_MASK |
1645                                 GDK_BUTTON_RELEASE_MASK |
1646                                 GDK_SCROLL_MASK |
1647                                 GDK_KEY_PRESS_MASK |
1648                                 GDK_POINTER_MOTION_MASK |
1649                                 GDK_POINTER_MOTION_HINT_MASK |
1650                                 GDK_ENTER_NOTIFY_MASK |
1651                                 GDK_LEAVE_NOTIFY_MASK;
1652
1653         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1654                                          &attributes,
1655                                          GDK_WA_X | GDK_WA_Y |
1656                                          GDK_WA_COLORMAP |
1657                                          GDK_WA_VISUAL);
1658         gdk_window_set_user_data (widget->window, widget);
1659         widget->style = gtk_style_attach (widget->style, widget->window);
1660
1661         if (view->presentation)
1662                 gdk_window_set_background (widget->window, &widget->style->black);
1663         else
1664                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1665 }
1666
1667 static gboolean
1668 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1669 {
1670         EvView *view = EV_VIEW (widget);
1671         guint state;
1672
1673         state = event->state & gtk_accelerator_get_default_mod_mask ();
1674
1675         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
1676                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1677
1678                 if (event->direction == GDK_SCROLL_UP ||
1679                     event->direction == GDK_SCROLL_LEFT) {
1680                         if (ev_view_can_zoom_in (view)) {
1681                                 ev_view_zoom_in (view);
1682                         }
1683                 } else {
1684                         if (ev_view_can_zoom_out (view)) {
1685                                 ev_view_zoom_out (view);
1686                         }
1687                 }
1688
1689                 return TRUE;
1690         }
1691
1692         view->jump_to_find_result = FALSE;
1693         /* Shift+Wheel scrolls the in the perpendicular direction */
1694         if (state & GDK_SHIFT_MASK) {
1695                 if (event->direction == GDK_SCROLL_UP)
1696                         event->direction = GDK_SCROLL_LEFT;
1697                 if (event->direction == GDK_SCROLL_LEFT)
1698                         event->direction = GDK_SCROLL_UP;
1699                 if (event->direction == GDK_SCROLL_DOWN)
1700                         event->direction = GDK_SCROLL_RIGHT;
1701                 if (event->direction == GDK_SCROLL_RIGHT)
1702                         event->direction = GDK_SCROLL_DOWN;
1703
1704                 event->state &= ~GDK_SHIFT_MASK;
1705                 state &= ~GDK_SHIFT_MASK;
1706         }
1707
1708         if (state == 0 && view->presentation) {
1709                 switch (event->direction) {
1710                         case GDK_SCROLL_DOWN:
1711                         case GDK_SCROLL_RIGHT:
1712                                 ev_view_next_page (view);
1713                                 break;
1714                         case GDK_SCROLL_UP:
1715                         case GDK_SCROLL_LEFT:
1716                                 ev_view_previous_page (view);
1717                                 break;
1718                 }
1719
1720                 return TRUE;
1721         }
1722
1723         return FALSE;
1724 }
1725
1726 static EvViewSelection *
1727 find_selection_for_page (EvView *view,
1728                          gint    page)
1729 {
1730         GList *list;
1731
1732         for (list = view->selection_info.selections; list != NULL; list = list->next) {
1733                 EvViewSelection *selection;
1734
1735                 selection = (EvViewSelection *) list->data;
1736
1737                 if (selection->page == page)
1738                         return selection;
1739         }
1740
1741         return NULL;
1742 }
1743
1744 static gboolean
1745 ev_view_expose_event (GtkWidget      *widget,
1746                       GdkEventExpose *event)
1747 {
1748         EvView *view = EV_VIEW (widget);
1749         int i;
1750
1751         if (view->loading) {
1752                 GdkRectangle area = {0};
1753
1754                 area.width = widget->allocation.width;
1755                 area.height = widget->allocation.height;
1756
1757                 draw_loading_text (view,
1758                                    &area,
1759                                    &(event->area));
1760         }
1761
1762         if (view->document == NULL)
1763                 return FALSE;
1764
1765         for (i = view->start_page; i <= view->end_page; i++) {
1766                 GdkRectangle page_area;
1767                 GtkBorder border;
1768                 gboolean page_ready = TRUE;
1769
1770                 if (!get_page_extents (view, i, &page_area, &border))
1771                         continue;
1772
1773                 page_area.x -= view->scroll_x;
1774                 page_area.y -= view->scroll_y;
1775
1776                 draw_one_page (view, i, &page_area, &border, &(event->area), &page_ready);
1777
1778                 if (page_ready && EV_IS_DOCUMENT_FIND (view->document))
1779                         highlight_find_results (view, i);
1780         }
1781
1782         return FALSE;
1783 }
1784
1785 static gboolean
1786 ev_view_popup_menu (GtkWidget *widget)
1787 {
1788     gint x, y;
1789     EvLink *link;
1790     EvView *view = EV_VIEW (widget);
1791
1792     gtk_widget_get_pointer (widget, &x, &y);
1793     link = ev_view_get_link_at_location (view, x, y);
1794     g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
1795     return TRUE;
1796 }
1797
1798 static gboolean
1799 ev_view_button_press_event (GtkWidget      *widget,
1800                             GdkEventButton *event)
1801 {
1802         EvView *view = EV_VIEW (widget);
1803         EvLink *link;
1804
1805         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1806                 gtk_widget_grab_focus (widget);
1807         }
1808
1809         view->pressed_button = event->button;
1810         view->selection_info.in_drag = FALSE;
1811
1812         switch (event->button) {
1813                 case 1:
1814                         if (view->selection_info.selections) {
1815                                 if (location_in_selected_text (view,
1816                                                                event->x + view->scroll_x,
1817                                                                event->y + view->scroll_y)) {
1818                                         view->selection_info.in_drag = TRUE;
1819                                 } else {
1820                                         clear_selection (view);
1821                                 }
1822
1823                                 gtk_widget_queue_draw (widget);
1824                         }
1825
1826                         view->selection_info.start.x = event->x + view->scroll_x;
1827                         view->selection_info.start.y = event->y + view->scroll_y;
1828
1829                         return TRUE;
1830                 case 2:
1831                         /* use root coordinates as reference point because
1832                          * scrolling changes window relative coordinates */
1833                         view->drag_info.start.x = event->x_root;
1834                         view->drag_info.start.y = event->y_root;
1835                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1836                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1837
1838                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1839
1840                         return TRUE;
1841                 case 3:
1842                         link = ev_view_get_link_at_location (view, event->x, event->y);
1843                         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
1844                         return TRUE;
1845         }
1846
1847         return FALSE;
1848 }
1849
1850 static void
1851 ev_view_drag_data_get (GtkWidget        *widget,
1852                        GdkDragContext   *context,
1853                        GtkSelectionData *selection_data,
1854                        guint             info,
1855                        guint             time)
1856 {
1857         EvView *view = EV_VIEW (widget);
1858
1859         if (view->selection_info.selections &&
1860             ev_document_can_get_text (view->document)) {
1861                 gchar *text;
1862
1863                 text = get_selected_text (view);
1864
1865                 gtk_selection_data_set_text (selection_data, text, strlen (text));
1866
1867                 g_free (text);
1868         }
1869 }
1870
1871 static gboolean
1872 selection_update_idle_cb (EvView *view)
1873 {
1874         compute_selections (view, &view->selection_info.start, &view->motion);
1875         view->selection_update_id = 0;
1876         return FALSE;
1877 }
1878
1879 static gboolean
1880 selection_scroll_timeout_cb (EvView *view)
1881 {
1882         gint x, y, shift = 0;
1883         GtkWidget *widget = GTK_WIDGET (view);
1884
1885         gtk_widget_get_pointer (widget, &x, &y);
1886
1887         if (y > widget->allocation.height) {
1888                 shift = (y - widget->allocation.height) / 2;
1889         } else if (y < 0) {
1890                 shift = y / 2;
1891         }
1892
1893         if (shift)
1894                 gtk_adjustment_set_value (view->vadjustment,
1895                                           CLAMP (view->vadjustment->value + shift,
1896                                           view->vadjustment->lower,
1897                                           view->vadjustment->upper -
1898                                           view->vadjustment->page_size));
1899
1900         if (x > widget->allocation.width) {
1901                 shift = (x - widget->allocation.width) / 2;
1902         } else if (x < 0) {
1903                 shift = x / 2;
1904         }
1905
1906         if (shift)
1907                 gtk_adjustment_set_value (view->hadjustment,
1908                                           CLAMP (view->hadjustment->value + shift,
1909                                           view->hadjustment->lower,
1910                                           view->hadjustment->upper -
1911                                           view->hadjustment->page_size));
1912
1913         return TRUE;
1914 }
1915
1916 static gboolean
1917 ev_view_motion_notify_event (GtkWidget      *widget,
1918                              GdkEventMotion *event)
1919 {
1920         EvView *view = EV_VIEW (widget);
1921         gint x, y;
1922
1923         if (!view->document)
1924                 return FALSE;
1925
1926         if (event->is_hint || event->window != widget->window) {
1927             gtk_widget_get_pointer (widget, &x, &y);
1928         } else {
1929             x = event->x;
1930             y = event->y;
1931         }
1932
1933         if (view->selection_info.in_drag) {
1934                 if (gtk_drag_check_threshold (widget,
1935                                               view->selection_info.start.x,
1936                                               view->selection_info.start.y,
1937                                               x, y)) {
1938                         GdkDragContext *context;
1939                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
1940
1941                         gtk_target_list_add_text_targets (target_list, 0);
1942
1943                         context = gtk_drag_begin (widget, target_list,
1944                                                   GDK_ACTION_COPY,
1945                                                   1, (GdkEvent *)event);
1946
1947                         view->selection_info.in_drag = FALSE;
1948
1949                         gtk_target_list_unref (target_list);
1950
1951                         return TRUE;
1952                 }
1953         }
1954
1955         /* For the Evince 0.4.x release, we limit selection to un-rotated
1956          * documents only.
1957          */
1958         if (view->pressed_button == 1 && view->rotation == 0) {
1959
1960                 /* Schedule timeout to scroll during selection and additionally
1961                  * scroll once to allow arbitrary speed. */
1962                 if (!view->selection_scroll_id)
1963                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME, (GSourceFunc)selection_scroll_timeout_cb, view);
1964                 else
1965                     selection_scroll_timeout_cb (view);
1966
1967                 view->selection_info.in_selection = TRUE;
1968                 view->motion.x = x + view->scroll_x;
1969                 view->motion.y = y + view->scroll_y;
1970
1971                 /* Queue an idle to handle the motion.  We do this because
1972                  * handling any selection events in the motion could be slower
1973                  * than new motion events reach us.  We always put it in the
1974                  * idle to make sure we catch up and don't visibly lag the
1975                  * mouse. */
1976                 if (!view->selection_update_id)
1977                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
1978
1979                 return TRUE;
1980         } else if (view->pressed_button == 2) {
1981                 if (!view->drag_info.in_drag) {
1982                         gboolean start;
1983
1984                         start = gtk_drag_check_threshold (widget,
1985                                                           view->drag_info.start.x,
1986                                                           view->drag_info.start.y,
1987                                                           event->x_root,
1988                                                           event->y_root);
1989                         view->drag_info.in_drag = start;
1990                 }
1991
1992                 if (view->drag_info.in_drag) {
1993                         int dx, dy;
1994                         gdouble dhadj_value, dvadj_value;
1995
1996                         dx = event->x_root - view->drag_info.start.x;
1997                         dy = event->y_root - view->drag_info.start.y;
1998
1999                         dhadj_value = view->hadjustment->page_size *
2000                                       (gdouble)dx / widget->allocation.width;
2001                         dvadj_value = view->vadjustment->page_size *
2002                                       (gdouble)dy / widget->allocation.height;
2003
2004                         /* clamp scrolling to visible area */
2005                         gtk_adjustment_set_value (view->hadjustment,
2006                                                   MIN(view->drag_info.hadj - dhadj_value,
2007                                                       view->hadjustment->upper -
2008                                                       view->hadjustment->page_size));
2009                         gtk_adjustment_set_value (view->vadjustment,
2010                                                   MIN(view->drag_info.vadj - dvadj_value,
2011                                                       view->vadjustment->upper -
2012                                                       view->vadjustment->page_size));
2013
2014                         return TRUE;
2015                 }
2016         /* For the Evince 0.4.x release, we limit links to un-rotated documents
2017          * only.
2018          */
2019         } else if (view->pressed_button <= 0 &&
2020                    view->rotation == 0) {
2021                 handle_link_over_xy (view, x, y);
2022                 return TRUE;
2023         }
2024
2025         return FALSE;
2026 }
2027
2028 static gboolean
2029 ev_view_button_release_event (GtkWidget      *widget,
2030                               GdkEventButton *event)
2031 {
2032         EvView *view = EV_VIEW (widget);
2033         EvLink *link;
2034
2035         if (view->pressed_button == 2) {
2036                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
2037         }
2038
2039         if (view->document) {
2040                 link = ev_view_get_link_at_location (view, event->x, event->y);
2041         } else {
2042                 link = NULL;
2043         }
2044
2045         view->pressed_button = -1;
2046         view->drag_info.in_drag = FALSE;
2047
2048         if (view->selection_scroll_id) {
2049             g_source_remove (view->selection_scroll_id);
2050             view->selection_scroll_id = 0;
2051         }
2052         if (view->selection_update_id) {
2053             g_source_remove (view->selection_update_id);
2054             view->selection_update_id = 0;
2055         }
2056
2057         if (view->selection_info.selections) {
2058                 ev_view_update_primary_selection (view);
2059
2060                 if (view->selection_info.in_drag) {
2061                         clear_selection (view);
2062                         gtk_widget_queue_draw (widget);
2063                 }
2064
2065                 view->selection_info.in_drag = FALSE;
2066         } else if (link) {
2067                 ev_view_handle_link (view, link);
2068         } else if (view->presentation) {
2069                 switch (event->button) {
2070                         case 1:
2071                                 ev_view_next_page (view);
2072                                 return TRUE;
2073                         case 3:
2074                                 ev_view_previous_page (view);
2075                                 return TRUE;
2076                 }
2077         }
2078
2079         return FALSE;
2080 }
2081
2082 static gint
2083 ev_view_focus_in (GtkWidget     *widget,
2084                   GdkEventFocus *event)
2085 {
2086         if (EV_VIEW (widget)->pixbuf_cache)
2087                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
2088         gtk_widget_queue_draw (widget);
2089
2090         return FALSE;
2091 }
2092
2093 static gint
2094 ev_view_focus_out (GtkWidget     *widget,
2095                      GdkEventFocus *event)
2096 {
2097         if (EV_VIEW (widget)->pixbuf_cache)
2098                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
2099         gtk_widget_queue_draw (widget);
2100
2101         return FALSE;
2102 }
2103
2104 static gboolean
2105 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
2106 {
2107         EvView *view = EV_VIEW (widget);
2108
2109         ev_view_set_status (view, NULL);
2110
2111         if (view->cursor == EV_VIEW_CURSOR_LINK ||
2112             view->cursor == EV_VIEW_CURSOR_IBEAM)
2113                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
2114
2115         if (view->link_tooltip) {
2116                 view->hovered_link = NULL;
2117                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
2118         }
2119
2120         return FALSE;
2121 }
2122
2123 static gboolean
2124 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
2125 {
2126         EvView *view = EV_VIEW (widget);
2127
2128         handle_link_over_xy (view, event->x, event->y);
2129
2130         return FALSE;
2131 }
2132
2133 static void
2134 ev_view_style_set (GtkWidget *widget,
2135                    GtkStyle  *old_style)
2136 {
2137         if (EV_VIEW (widget)->pixbuf_cache)
2138                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
2139
2140         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
2141 }
2142
2143 /*** Drawing ***/
2144
2145 static guint32
2146 ev_gdk_color_to_rgb (const GdkColor *color)
2147 {
2148   guint32 result;
2149   result = (0xff0000 | (color->red & 0xff00));
2150   result <<= 8;
2151   result |= ((color->green & 0xff00) | (color->blue >> 8));
2152   return result;
2153 }
2154
2155 static void
2156 draw_rubberband (GtkWidget *widget, GdkWindow *window,
2157                  const GdkRectangle *rect, guchar alpha)
2158 {
2159         GdkGC *gc;
2160         GdkPixbuf *pixbuf;
2161         GdkColor *fill_color_gdk;
2162         guint fill_color;
2163
2164         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
2165         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
2166
2167         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
2168                                  rect->width, rect->height);
2169         gdk_pixbuf_fill (pixbuf, fill_color);
2170
2171         gdk_draw_pixbuf (window, NULL, pixbuf,
2172                          0, 0,
2173                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
2174                          rect->width, rect->height,
2175                          GDK_RGB_DITHER_NONE,
2176                          0, 0);
2177
2178         g_object_unref (pixbuf);
2179
2180         gc = gdk_gc_new (window);
2181         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
2182         gdk_draw_rectangle (window, gc, FALSE,
2183                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
2184                             rect->width - 1,
2185                             rect->height - 1);
2186         g_object_unref (gc);
2187
2188         gdk_color_free (fill_color_gdk);
2189 }
2190
2191
2192 static void
2193 highlight_find_results (EvView *view, int page)
2194 {
2195         EvDocumentFind *find;
2196         int i, results = 0;
2197
2198         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
2199
2200         find = EV_DOCUMENT_FIND (view->document);
2201
2202         results = ev_document_find_get_n_results (find, page);
2203
2204         for (i = 0; i < results; i++) {
2205                 EvRectangle rectangle;
2206                 GdkRectangle view_rectangle;
2207                 guchar alpha;
2208
2209                 if (i == view->find_result && page == view->current_page) {
2210                         alpha = 0x90;
2211                 } else {
2212                         alpha = 0x20;
2213                 }
2214
2215                 ev_document_find_get_result (find, page, i, &rectangle);
2216                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
2217                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
2218                                  &view_rectangle, alpha);
2219         }
2220 }
2221
2222 static void
2223 draw_loading_text (EvView       *view,
2224                    GdkRectangle *page_area,
2225                    GdkRectangle *expose_area)
2226 {
2227         PangoLayout *layout;
2228         PangoFontDescription *font_desc;
2229         PangoRectangle logical_rect;
2230         double real_scale;
2231         int target_width;
2232
2233         const char *loading_text = _("Loading...");
2234
2235         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
2236
2237         font_desc = pango_font_description_new ();
2238
2239
2240         /* We set the font to be 10 points, get the size, and scale appropriately */
2241         pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
2242         pango_layout_set_font_description (layout, font_desc);
2243         pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
2244
2245         /* Make sure we fit the middle of the page */
2246         target_width = MAX (page_area->width / 2, 1);
2247         real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
2248         pango_font_description_set_size (font_desc, (int)real_scale);
2249         pango_layout_set_font_description (layout, font_desc);
2250         pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
2251
2252         gtk_paint_layout (GTK_WIDGET (view)->style,
2253                           GTK_WIDGET (view)->window,
2254                           GTK_WIDGET_STATE (view),
2255                           FALSE,
2256                           page_area,
2257                           GTK_WIDGET (view),
2258                           NULL,
2259                           page_area->x + (target_width/2),
2260                           page_area->y + (page_area->height - logical_rect.height) / 2,
2261                           layout);
2262
2263         pango_font_description_free (font_desc);
2264         g_object_unref (layout);
2265 }
2266
2267 static void
2268 draw_one_page (EvView          *view,
2269                gint             page,
2270                GdkRectangle    *page_area,
2271                GtkBorder       *border,
2272                GdkRectangle    *expose_area,
2273                gboolean        *page_ready)
2274 {
2275         gint width, height;
2276         GdkPixbuf *current_pixbuf;
2277         GdkRectangle overlap;
2278         GdkRectangle real_page_area;
2279         EvViewSelection *selection;
2280         gint current_page;
2281
2282         g_assert (view->document);
2283
2284         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
2285                 return;
2286
2287         current_page = ev_page_cache_get_current_page (view->page_cache);
2288         selection = find_selection_for_page (view, page);
2289         ev_page_cache_get_size (view->page_cache,
2290                                 page, view->rotation,
2291                                 view->scale,
2292                                 &width, &height);
2293         /* Render the document itself */
2294         real_page_area = *page_area;
2295
2296         real_page_area.x += border->left;
2297         real_page_area.y += border->top;
2298         real_page_area.width -= (border->left + border->right);
2299         real_page_area.height -= (border->top + border->bottom);
2300         *page_ready = TRUE;
2301
2302         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
2303                                          GTK_WIDGET (view),
2304                                          page_area, border,
2305                                          page == current_page);
2306
2307         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
2308                 GdkPixbuf *selection_pixbuf = NULL;
2309                 GdkPixbuf *scaled_image;
2310                 GdkPixbuf *scaled_selection;
2311
2312                 current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
2313
2314                 /* Get the selection pixbuf iff we have something to draw */
2315                 if (current_pixbuf && view->selection_mode == EV_VIEW_SELECTION_TEXT && selection)
2316                         selection_pixbuf = ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
2317                                                                                  page,
2318                                                                                  view->scale,
2319                                                                                  NULL);
2320
2321                 if (current_pixbuf == NULL)
2322                         scaled_image = NULL;
2323                 else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
2324                          height == gdk_pixbuf_get_height (current_pixbuf))
2325                         scaled_image = g_object_ref (current_pixbuf);
2326                 else
2327                         /* FIXME: We don't want to scale the whole area, just the right
2328                          * area of it */
2329                         scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
2330                                                                 width, height,
2331                                                                 GDK_INTERP_NEAREST);
2332
2333                 if (selection_pixbuf == NULL)
2334                         scaled_selection = NULL;
2335                 else if (width == gdk_pixbuf_get_width (selection_pixbuf) &&
2336                          height == gdk_pixbuf_get_height (selection_pixbuf))
2337                         scaled_selection = g_object_ref (selection_pixbuf);
2338                 else
2339                         /* FIXME: We don't want to scale the whole area, just the right
2340                          * area of it */
2341                         scaled_selection = gdk_pixbuf_scale_simple (selection_pixbuf,
2342                                                                     width, height,
2343                                                                     GDK_INTERP_NEAREST);
2344
2345                 if (scaled_image) {
2346                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
2347                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
2348                                          scaled_image,
2349                                          overlap.x - real_page_area.x,
2350                                          overlap.y - real_page_area.y,
2351                                          overlap.x, overlap.y,
2352                                          overlap.width, overlap.height,
2353                                          GDK_RGB_DITHER_NORMAL,
2354                                          0, 0);
2355                         g_object_unref (scaled_image);
2356                 } else {
2357                         draw_loading_text (view,
2358                                            &real_page_area,
2359                                            expose_area);
2360                         *page_ready = FALSE;
2361                 }
2362
2363                 if (scaled_selection) {
2364                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
2365                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
2366                                          scaled_selection,
2367                                          overlap.x - real_page_area.x,
2368                                          overlap.y - real_page_area.y,
2369                                          overlap.x, overlap.y,
2370                                          overlap.width, overlap.height,
2371                                          GDK_RGB_DITHER_NORMAL,
2372                                          0, 0);
2373                         g_object_unref (scaled_selection);
2374                 }
2375         }
2376 }
2377
2378 /*** GObject functions ***/
2379
2380 static void
2381 ev_view_finalize (GObject *object)
2382 {
2383         EvView *view = EV_VIEW (object);
2384
2385         LOG ("Finalize");
2386
2387         g_free (view->status);
2388         g_free (view->find_status);
2389
2390         clear_selection (view);
2391
2392         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
2393 }
2394
2395 static void
2396 ev_view_destroy (GtkObject *object)
2397 {
2398         EvView *view = EV_VIEW (object);
2399
2400         if (view->document) {
2401                 g_object_unref (view->document);
2402                 view->document = NULL;
2403         }
2404
2405         if (view->pixbuf_cache) {
2406                 g_object_unref (view->pixbuf_cache);
2407                 view->pixbuf_cache = NULL;
2408         }
2409
2410         if (view->link_tooltip) {
2411                 gtk_widget_destroy (view->link_tooltip);
2412         }
2413
2414         if (view->selection_scroll_id) {
2415             g_source_remove (view->selection_scroll_id);
2416             view->selection_scroll_id = 0;
2417         }
2418
2419         if (view->selection_update_id) {
2420             g_source_remove (view->selection_update_id);
2421             view->selection_update_id = 0;
2422         }
2423
2424         ev_view_set_scroll_adjustments (view, NULL, NULL);
2425
2426         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
2427 }
2428
2429 static void
2430 ev_view_set_property (GObject      *object,
2431                       guint         prop_id,
2432                       const GValue *value,
2433                       GParamSpec   *pspec)
2434 {
2435         EvView *view = EV_VIEW (object);
2436
2437         switch (prop_id) {
2438                 case PROP_CONTINUOUS:
2439                         ev_view_set_continuous (view, g_value_get_boolean (value));
2440                         break;
2441                 case PROP_DUAL_PAGE:
2442                         ev_view_set_dual_page (view, g_value_get_boolean (value));
2443                         break;
2444                 case PROP_FULLSCREEN:
2445                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
2446                         break;
2447                 case PROP_PRESENTATION:
2448                         ev_view_set_presentation (view, g_value_get_boolean (value));
2449                         break;
2450                 case PROP_SIZING_MODE:
2451                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
2452                         break;
2453                 case PROP_ZOOM:
2454                         ev_view_set_zoom (view, g_value_get_double (value), FALSE);
2455                         break;
2456                 case PROP_ROTATION:
2457                         ev_view_set_rotation (view, g_value_get_int (value));
2458                         break;
2459                 default:
2460                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2461         }
2462 }
2463
2464 static AtkObject *
2465 ev_view_get_accessible (GtkWidget *widget)
2466 {
2467         static gboolean first_time = TRUE;
2468
2469         if (first_time) {
2470                 AtkObjectFactory *factory;
2471                 AtkRegistry *registry;
2472                 GType derived_type;
2473                 GType derived_atk_type;
2474
2475                 /*
2476                  * Figure out whether accessibility is enabled by looking at the
2477                  * type of the accessible object which would be created for
2478                  * the parent type of EvView.
2479                  */
2480                 derived_type = g_type_parent (EV_TYPE_VIEW);
2481
2482                 registry = atk_get_default_registry ();
2483                 factory = atk_registry_get_factory (registry,
2484                                                     derived_type);
2485                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
2486                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
2487                         atk_registry_set_factory_type (registry,
2488                                                        EV_TYPE_VIEW,
2489                                                        ev_view_accessible_factory_get_type ());
2490                 first_time = FALSE;
2491         }
2492         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
2493 }
2494
2495 static void
2496 ev_view_get_property (GObject *object,
2497                       guint prop_id,
2498                       GValue *value,
2499                       GParamSpec *pspec)
2500 {
2501         EvView *view = EV_VIEW (object);
2502
2503         switch (prop_id) {
2504                 case PROP_STATUS:
2505                         g_value_set_string (value, view->status);
2506                         break;
2507                 case PROP_FIND_STATUS:
2508                         g_value_set_string (value, view->status);
2509                         break;
2510                 case PROP_CONTINUOUS:
2511                         g_value_set_boolean (value, view->continuous);
2512                         break;
2513                 case PROP_DUAL_PAGE:
2514                         g_value_set_boolean (value, view->dual_page);
2515                         break;
2516                 case PROP_FULLSCREEN:
2517                         g_value_set_boolean (value, view->fullscreen);
2518                         break;
2519                 case PROP_PRESENTATION:
2520                         g_value_set_boolean (value, view->presentation);
2521                         break;
2522                 case PROP_SIZING_MODE:
2523                         g_value_set_enum (value, view->sizing_mode);
2524                         break;
2525                 case PROP_ZOOM:
2526                         g_value_set_double (value, view->scale);
2527                         break;
2528                 case PROP_ROTATION:
2529                         g_value_set_int (value, view->rotation);
2530                         break;
2531                 case PROP_HAS_SELECTION:
2532                         g_value_set_boolean (value,
2533                                              view->selection_info.selections != NULL);
2534                         break;
2535                 default:
2536                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2537         }
2538 }
2539
2540 static void
2541 ev_view_class_init (EvViewClass *class)
2542 {
2543         GObjectClass *object_class = G_OBJECT_CLASS (class);
2544         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
2545         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
2546         GtkBindingSet *binding_set;
2547
2548         object_class->finalize = ev_view_finalize;
2549         object_class->set_property = ev_view_set_property;
2550         object_class->get_property = ev_view_get_property;
2551
2552         widget_class->expose_event = ev_view_expose_event;
2553         widget_class->button_press_event = ev_view_button_press_event;
2554         widget_class->motion_notify_event = ev_view_motion_notify_event;
2555         widget_class->button_release_event = ev_view_button_release_event;
2556         widget_class->focus_in_event = ev_view_focus_in;
2557         widget_class->focus_out_event = ev_view_focus_out;
2558         widget_class->get_accessible = ev_view_get_accessible;
2559         widget_class->size_request = ev_view_size_request;
2560         widget_class->size_allocate = ev_view_size_allocate;
2561         widget_class->realize = ev_view_realize;
2562         widget_class->scroll_event = ev_view_scroll_event;
2563         widget_class->enter_notify_event = ev_view_enter_notify_event;
2564         widget_class->leave_notify_event = ev_view_leave_notify_event;
2565         widget_class->style_set = ev_view_style_set;
2566         widget_class->drag_data_get = ev_view_drag_data_get;
2567         widget_class->popup_menu = ev_view_popup_menu;
2568         gtk_object_class->destroy = ev_view_destroy;
2569
2570         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
2571         class->binding_activated = ev_view_scroll;
2572
2573         widget_class->set_scroll_adjustments_signal =
2574             g_signal_new ("set-scroll-adjustments",
2575                           G_OBJECT_CLASS_TYPE (object_class),
2576                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2577                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
2578                           NULL, NULL,
2579                           ev_marshal_VOID__OBJECT_OBJECT,
2580                           G_TYPE_NONE, 2,
2581                           GTK_TYPE_ADJUSTMENT,
2582                           GTK_TYPE_ADJUSTMENT);
2583
2584         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
2585                          G_TYPE_FROM_CLASS (object_class),
2586                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2587                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
2588                          NULL, NULL,
2589                          ev_marshal_VOID__ENUM_BOOLEAN,
2590                          G_TYPE_NONE, 2,
2591                          GTK_TYPE_SCROLL_TYPE,
2592                          G_TYPE_BOOLEAN);
2593
2594         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
2595                          G_TYPE_FROM_CLASS (object_class),
2596                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2597                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
2598                          NULL, NULL,
2599                          ev_marshal_VOID__VOID,
2600                          G_TYPE_NONE, 0, G_TYPE_NONE);
2601         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
2602                          G_TYPE_FROM_CLASS (object_class),
2603                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2604                          G_STRUCT_OFFSET (EvViewClass, external_link),
2605                          NULL, NULL,
2606                          g_cclosure_marshal_VOID__OBJECT,
2607                          G_TYPE_NONE, 1,
2608                          G_TYPE_OBJECT);
2609         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
2610                          G_TYPE_FROM_CLASS (object_class),
2611                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2612                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
2613                          NULL, NULL,
2614                          g_cclosure_marshal_VOID__OBJECT,
2615                          G_TYPE_NONE, 1,
2616                          G_TYPE_OBJECT);
2617
2618         g_object_class_install_property (object_class,
2619                                          PROP_STATUS,
2620                                          g_param_spec_string ("status",
2621                                                               "Status Message",
2622                                                               "The status message",
2623                                                               NULL,
2624                                                               G_PARAM_READABLE));
2625
2626         g_object_class_install_property (object_class,
2627                                          PROP_FIND_STATUS,
2628                                          g_param_spec_string ("find-status",
2629                                                               "Find Status Message",
2630                                                               "The find status message",
2631                                                               NULL,
2632                                                               G_PARAM_READABLE));
2633
2634         g_object_class_install_property (object_class,
2635                                          PROP_CONTINUOUS,
2636                                          g_param_spec_boolean ("continuous",
2637                                                                "Continuous",
2638                                                                "Continuous scrolling mode",
2639                                                                TRUE,
2640                                                                G_PARAM_READWRITE));
2641
2642         g_object_class_install_property (object_class,
2643                                          PROP_DUAL_PAGE,
2644                                          g_param_spec_boolean ("dual-page",
2645                                                                "Dual Page",
2646                                                                "Two pages visible at once",
2647                                                                FALSE,
2648                                                                G_PARAM_READWRITE));
2649         g_object_class_install_property (object_class,
2650                                          PROP_FULLSCREEN,
2651                                          g_param_spec_boolean ("fullscreen",
2652                                                                "Full Screen",
2653                                                                "Draw page in a fullscreen fashion",
2654                                                                FALSE,
2655                                                                G_PARAM_READWRITE));
2656         g_object_class_install_property (object_class,
2657                                          PROP_PRESENTATION,
2658                                          g_param_spec_boolean ("presentation",
2659                                                                "Presentation",
2660                                                                "Draw page in presentation mode",
2661                                                                TRUE,
2662                                                                G_PARAM_READWRITE));
2663
2664         g_object_class_install_property (object_class,
2665                                          PROP_SIZING_MODE,
2666                                          g_param_spec_enum ("sizing-mode",
2667                                                             "Sizing Mode",
2668                                                             "Sizing Mode",
2669                                                             EV_TYPE_SIZING_MODE,
2670                                                             EV_SIZING_FIT_WIDTH,
2671                                                             G_PARAM_READWRITE));
2672
2673         g_object_class_install_property (object_class,
2674                                          PROP_ZOOM,
2675                                          g_param_spec_double ("zoom",
2676                                                               "Zoom factor",
2677                                                                "Zoom factor",
2678                                                                MIN_SCALE,
2679                                                                MAX_SCALE,
2680                                                                1.0,
2681                                                                G_PARAM_READWRITE));
2682         g_object_class_install_property (object_class,
2683                                          PROP_ROTATION,
2684                                          g_param_spec_double ("rotation",
2685                                                               "Rotation",
2686                                                                "Rotation",
2687                                                                0,
2688                                                                360,
2689                                                                0,
2690                                                                G_PARAM_READWRITE));
2691         g_object_class_install_property (object_class,
2692                                          PROP_HAS_SELECTION,
2693                                          g_param_spec_boolean ("has-selection",
2694                                                                "Has selection",
2695                                                                "The view has selections",
2696                                                                FALSE,
2697                                                                G_PARAM_READABLE));
2698
2699         binding_set = gtk_binding_set_by_class (class);
2700
2701         add_scroll_binding_keypad (binding_set, GDK_Left,  0, EV_SCROLL_STEP_BACKWARD, TRUE);
2702         add_scroll_binding_keypad (binding_set, GDK_Right, 0, EV_SCROLL_STEP_FORWARD,  TRUE);
2703         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, EV_SCROLL_STEP_DOWN, TRUE);
2704         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, EV_SCROLL_STEP_UP,  TRUE);
2705         add_scroll_binding_keypad (binding_set, GDK_Up,    0, EV_SCROLL_STEP_BACKWARD, FALSE);
2706         add_scroll_binding_keypad (binding_set, GDK_Down,  0, EV_SCROLL_STEP_FORWARD,  FALSE);
2707         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, EV_SCROLL_STEP_DOWN, FALSE);
2708         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, EV_SCROLL_STEP_UP,  FALSE);
2709 }
2710
2711 static void
2712 ev_view_init (EvView *view)
2713 {
2714         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
2715
2716         view->spacing = 5;
2717         view->scale = 1.0;
2718         view->current_page = 0;
2719         view->pressed_button = -1;
2720         view->cursor = EV_VIEW_CURSOR_NORMAL;
2721         view->drag_info.in_drag = FALSE;
2722         view->selection_info.selections = NULL;
2723         view->selection_info.in_selection = FALSE;
2724         view->selection_info.in_drag = FALSE;
2725         view->selection_mode = EV_VIEW_SELECTION_TEXT;
2726         view->continuous = TRUE;
2727         view->dual_page = FALSE;
2728         view->presentation = FALSE;
2729         view->fullscreen = FALSE;
2730         view->sizing_mode = EV_SIZING_FIT_WIDTH;
2731         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2732         view->jump_to_find_result = TRUE;
2733 }
2734
2735 /*** Callbacks ***/
2736
2737 static void
2738 find_changed_cb (EvDocument *document, int page, EvView *view)
2739 {
2740         double percent;
2741         int n_pages;
2742
2743         percent = ev_document_find_get_progress
2744                         (EV_DOCUMENT_FIND (view->document));
2745         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2746
2747         if (view->jump_to_find_result == TRUE) {
2748                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
2749                 jump_to_find_result (view);
2750         }
2751         update_find_status_message (view, percent * n_pages >= n_pages - 1 );
2752         if (view->current_page == page)
2753                 gtk_widget_queue_draw (GTK_WIDGET (view));
2754 }
2755
2756 static void
2757 job_finished_cb (EvPixbufCache *pixbuf_cache,
2758                  EvView        *view)
2759 {
2760         gtk_widget_queue_draw (GTK_WIDGET (view));
2761 }
2762
2763 static void
2764 page_changed_cb (EvPageCache *page_cache,
2765                  int          new_page,
2766                  EvView      *view)
2767 {
2768         if (view->current_page != new_page) {
2769                 view->current_page = new_page;
2770                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
2771                 gtk_widget_queue_resize (GTK_WIDGET (view));
2772         } else {
2773                 gtk_widget_queue_draw (GTK_WIDGET (view));
2774         }
2775
2776         if (EV_IS_DOCUMENT_FIND (view->document)) {
2777                 view->find_result = 0;
2778                 update_find_status_message (view, TRUE);
2779         }
2780 }
2781
2782 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
2783                                          EvView *view)
2784 {
2785         int dx = 0, dy = 0;
2786
2787         if (! GTK_WIDGET_REALIZED (view))
2788                 return;
2789
2790         if (view->hadjustment) {
2791                 dx = view->scroll_x - (int) view->hadjustment->value;
2792                 view->scroll_x = (int) view->hadjustment->value;
2793         } else {
2794                 view->scroll_x = 0;
2795         }
2796
2797         if (view->vadjustment) {
2798                 dy = view->scroll_y - (int) view->vadjustment->value;
2799                 view->scroll_y = (int) view->vadjustment->value;
2800         } else {
2801                 view->scroll_y = 0;
2802         }
2803
2804
2805         if (view->pending_resize)
2806                 gtk_widget_queue_draw (GTK_WIDGET (view));
2807         else
2808                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
2809
2810
2811         if (view->document)
2812                 view_update_range_and_current_page (view);
2813 }
2814
2815 GtkWidget*
2816 ev_view_new (void)
2817 {
2818         GtkWidget *view;
2819
2820         view = g_object_new (EV_TYPE_VIEW, NULL);
2821
2822         return view;
2823 }
2824
2825 static void
2826 setup_caches (EvView *view)
2827 {
2828         view->page_cache = ev_page_cache_get (view->document);
2829         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
2830         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
2831         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
2832 }
2833
2834 static void
2835 clear_caches (EvView *view)
2836 {
2837         if (view->pixbuf_cache) {
2838                 g_object_unref (view->pixbuf_cache);
2839                 view->pixbuf_cache = NULL;
2840         }
2841
2842         if (view->page_cache) {
2843                 view->page_cache = NULL;
2844         }
2845 }
2846
2847 void
2848 ev_view_set_loading (EvView       *view,
2849                      gboolean      loading)
2850 {
2851         view->loading = loading;
2852         gtk_widget_queue_draw (GTK_WIDGET (view));
2853 }
2854
2855 void
2856 ev_view_set_document (EvView     *view,
2857                       EvDocument *document)
2858 {
2859         g_return_if_fail (EV_IS_VIEW (view));
2860
2861         view->loading = FALSE;
2862
2863         if (document != view->document) {
2864                 clear_caches (view);
2865
2866                 if (view->document) {
2867                         g_signal_handlers_disconnect_by_func (view->document,
2868                                                               find_changed_cb,
2869                                                               view);
2870                         g_object_unref (view->document);
2871                         view->page_cache = NULL;
2872
2873                 }
2874
2875                 view->document = document;
2876                 view->find_result = 0;
2877
2878                 if (view->document) {
2879                         g_object_ref (view->document);
2880                         if (EV_IS_DOCUMENT_FIND (view->document)) {
2881                                 g_signal_connect (view->document,
2882                                                   "find_changed",
2883                                                   G_CALLBACK (find_changed_cb),
2884                                                   view);
2885                         }
2886
2887                         setup_caches (view);
2888                 }
2889
2890                 gtk_widget_queue_resize (GTK_WIDGET (view));
2891         }
2892 }
2893
2894 /*** Zoom and sizing mode ***/
2895
2896 #define EPSILON 0.0000001
2897 void
2898 ev_view_set_zoom (EvView   *view,
2899                   double    factor,
2900                   gboolean  relative)
2901 {
2902         double scale;
2903
2904         if (relative)
2905                 scale = view->scale * factor;
2906         else
2907                 scale = factor;
2908
2909         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
2910
2911         if (ABS (view->scale - scale) < EPSILON)
2912                 return;
2913
2914         view->scale = scale;
2915         view->pending_resize = TRUE;
2916
2917         gtk_widget_queue_resize (GTK_WIDGET (view));
2918
2919         g_object_notify (G_OBJECT (view), "zoom");
2920 }
2921
2922 double
2923 ev_view_get_zoom (EvView *view)
2924 {
2925         return view->scale;
2926 }
2927
2928 gboolean
2929 ev_view_get_continuous (EvView *view)
2930 {
2931         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2932
2933         return view->continuous;
2934 }
2935
2936 void
2937 ev_view_set_continuous (EvView   *view,
2938                         gboolean  continuous)
2939 {
2940         g_return_if_fail (EV_IS_VIEW (view));
2941
2942         continuous = continuous != FALSE;
2943
2944         if (view->continuous != continuous) {
2945                 view->continuous = continuous;
2946                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
2947                 gtk_widget_queue_resize (GTK_WIDGET (view));
2948         }
2949
2950         g_object_notify (G_OBJECT (view), "continuous");
2951 }
2952
2953 gboolean
2954 ev_view_get_dual_page (EvView *view)
2955 {
2956         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2957
2958         return view->dual_page;
2959 }
2960
2961 void
2962 ev_view_set_dual_page (EvView   *view,
2963                        gboolean  dual_page)
2964 {
2965         g_return_if_fail (EV_IS_VIEW (view));
2966
2967         dual_page = dual_page != FALSE;
2968
2969         if (view->dual_page == dual_page)
2970                 return;
2971
2972         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
2973         view->dual_page = dual_page;
2974         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2975          * preload_cache_size to be 2 if dual_page is set.
2976          */
2977         gtk_widget_queue_resize (GTK_WIDGET (view));
2978
2979         g_object_notify (G_OBJECT (view), "dual-page");
2980 }
2981
2982 void
2983 ev_view_set_fullscreen (EvView   *view,
2984                          gboolean  fullscreen)
2985 {
2986         g_return_if_fail (EV_IS_VIEW (view));
2987
2988         fullscreen = fullscreen != FALSE;
2989
2990         if (view->fullscreen == fullscreen)
2991                 return;
2992
2993         view->fullscreen = fullscreen;
2994         gtk_widget_queue_resize (GTK_WIDGET (view));
2995
2996         g_object_notify (G_OBJECT (view), "fullscreen");
2997 }
2998
2999 gboolean
3000 ev_view_get_fullscreen (EvView *view)
3001 {
3002         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3003
3004         return view->fullscreen;
3005 }
3006
3007 void
3008 ev_view_set_presentation (EvView   *view,
3009                           gboolean  presentation)
3010 {
3011         g_return_if_fail (EV_IS_VIEW (view));
3012
3013         presentation = presentation != FALSE;
3014
3015         if (view->presentation == presentation)
3016                 return;
3017
3018         view->presentation = presentation;
3019         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
3020         gtk_widget_queue_resize (GTK_WIDGET (view));
3021
3022         if (GTK_WIDGET_REALIZED (view)) {
3023                 if (view->presentation)
3024                         gdk_window_set_background (GTK_WIDGET(view)->window,
3025                                                    &GTK_WIDGET (view)->style->black);
3026                 else
3027                         gdk_window_set_background (GTK_WIDGET(view)->window,
3028                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
3029         }
3030
3031
3032         g_object_notify (G_OBJECT (view), "presentation");
3033 }
3034
3035 gboolean
3036 ev_view_get_presentation (EvView *view)
3037 {
3038         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3039
3040         return view->presentation;
3041 }
3042
3043 void
3044 ev_view_set_sizing_mode (EvView       *view,
3045                          EvSizingMode  sizing_mode)
3046 {
3047         g_return_if_fail (EV_IS_VIEW (view));
3048
3049         if (view->sizing_mode == sizing_mode)
3050                 return;
3051
3052         view->sizing_mode = sizing_mode;
3053         gtk_widget_queue_resize (GTK_WIDGET (view));
3054
3055         g_object_notify (G_OBJECT (view), "sizing-mode");
3056 }
3057
3058 EvSizingMode
3059 ev_view_get_sizing_mode (EvView *view)
3060 {
3061         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
3062
3063         return view->sizing_mode;
3064 }
3065
3066 gboolean
3067 ev_view_can_zoom_in (EvView *view)
3068 {
3069         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
3070 }
3071
3072 gboolean
3073 ev_view_can_zoom_out (EvView *view)
3074 {
3075         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
3076 }
3077
3078 void
3079 ev_view_zoom_in (EvView *view)
3080 {
3081         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
3082
3083         view->pending_scroll = SCROLL_TO_CENTER;
3084         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
3085 }
3086
3087 void
3088 ev_view_zoom_out (EvView *view)
3089 {
3090         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
3091
3092         view->pending_scroll = SCROLL_TO_CENTER;
3093         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
3094 }
3095
3096 void
3097 ev_view_rotate_right (EvView *view)
3098 {
3099         int rotation = view->rotation + 90;
3100
3101         if (rotation >= 360) {
3102                 rotation -= 360;
3103         }
3104
3105         ev_view_set_rotation (view, rotation);
3106 }
3107
3108 void
3109 ev_view_rotate_left (EvView *view)
3110 {
3111         int rotation = view->rotation - 90;
3112
3113         if (rotation < 0) {
3114                 rotation += 360;
3115         }
3116
3117         ev_view_set_rotation (view, rotation);
3118 }
3119
3120 void
3121 ev_view_set_rotation (EvView *view, int rotation)
3122 {
3123         view->rotation = rotation;
3124
3125         if (view->pixbuf_cache) {
3126                 ev_pixbuf_cache_clear (view->pixbuf_cache);
3127                 gtk_widget_queue_resize (GTK_WIDGET (view));
3128         }
3129
3130         if (rotation != 0)
3131                 clear_selection (view);
3132
3133         g_object_notify (G_OBJECT (view), "rotation");
3134 }
3135
3136 int
3137 ev_view_get_rotation (EvView *view)
3138 {
3139         return view->rotation;
3140 }
3141
3142 static double
3143 zoom_for_size_fit_width (int doc_width,
3144                          int doc_height,
3145                          int target_width,
3146                          int target_height,
3147                          int vsb_width)
3148 {
3149         double scale;
3150
3151         scale = (double)target_width / doc_width;
3152
3153         if (doc_height * scale > target_height)
3154                 scale = (double) (target_width - vsb_width) / doc_width;
3155
3156         return scale;
3157 }
3158
3159 static double
3160 zoom_for_size_fit_height (int doc_width,
3161                           int doc_height,
3162                           int target_width,
3163                           int target_height,
3164                           int vsb_height)
3165 {
3166         double scale;
3167
3168         scale = (double)target_height / doc_height;
3169
3170         if (doc_width * scale > target_width)
3171                 scale = (double) (target_height - vsb_height) / doc_height;
3172
3173         return scale;
3174 }
3175
3176 static double
3177 zoom_for_size_best_fit (int doc_width,
3178                         int doc_height,
3179                         int target_width,
3180                         int target_height,
3181                         int vsb_width,
3182                         int hsb_width)
3183 {
3184         double w_scale;
3185         double h_scale;
3186
3187         w_scale = (double)target_width / doc_width;
3188         h_scale = (double)target_height / doc_height;
3189
3190         if (doc_height * w_scale > target_height)
3191                 w_scale = (double) (target_width - vsb_width) / doc_width;
3192         if (doc_width * h_scale > target_width)
3193                 h_scale = (double) (target_height - hsb_width) / doc_height;
3194
3195         return MIN (w_scale, h_scale);
3196 }
3197
3198
3199 static void
3200 ev_view_zoom_for_size_presentation (EvView *view,
3201                                     int     width,
3202                                     int     height)
3203 {
3204         int doc_width, doc_height;
3205         gdouble scale;
3206
3207         ev_page_cache_get_size (view->page_cache,
3208                                 view->current_page,
3209                                 view->rotation,
3210                                 1.0,
3211                                 &doc_width,
3212                                 &doc_height);
3213         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
3214         ev_view_set_zoom (view, scale, FALSE);
3215 }
3216
3217 static void
3218 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
3219                            int     width,
3220                            int     height,
3221                            int     vsb_width,
3222                            int     hsb_height)
3223 {
3224         int doc_width, doc_height;
3225         GtkBorder border;
3226         gdouble scale;
3227
3228         ev_page_cache_get_max_width (view->page_cache,
3229                                      view->rotation,
3230                                      1.0,
3231                                      &doc_width);
3232         ev_page_cache_get_max_height (view->page_cache,
3233                                       view->rotation,
3234                                       1.0,
3235                                       &doc_height);
3236         compute_border (view, doc_width, doc_height, &border);
3237
3238         doc_width = doc_width * 2;
3239         width -= (2 * (border.left + border.right) + 3 * view->spacing);
3240         height -= (border.top + border.bottom + 2 * view->spacing - 1);
3241
3242         /* FIXME: We really need to calculate the overall height here, not the
3243          * page height.  We assume there's always a vertical scrollbar for
3244          * now.  We need to fix this. */
3245         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3246                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
3247         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3248                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
3249         else
3250                 g_assert_not_reached ();
3251
3252         ev_view_set_zoom (view, scale, FALSE);
3253 }
3254
3255 static void
3256 ev_view_zoom_for_size_continuous (EvView *view,
3257                                   int     width,
3258                                   int     height,
3259                                   int     vsb_width,
3260                                   int     hsb_height)
3261 {
3262         int doc_width, doc_height;
3263         GtkBorder border;
3264         gdouble scale;
3265
3266         ev_page_cache_get_max_width (view->page_cache,
3267                                      view->rotation,
3268                                      1.0,
3269                                      &doc_width);
3270         ev_page_cache_get_max_height (view->page_cache,
3271                                       view->rotation,
3272                                       1.0,
3273                                       &doc_height);
3274         compute_border (view, doc_width, doc_height, &border);
3275
3276         width -= (border.left + border.right + 2 * view->spacing);
3277         height -= (border.top + border.bottom + 2 * view->spacing - 1);
3278
3279         /* FIXME: We really need to calculate the overall height here, not the
3280          * page height.  We assume there's always a vertical scrollbar for
3281          * now.  We need to fix this. */
3282         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3283                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
3284         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3285                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
3286         else
3287                 g_assert_not_reached ();
3288
3289         ev_view_set_zoom (view, scale, FALSE);
3290 }
3291
3292 static void
3293 ev_view_zoom_for_size_dual_page (EvView *view,
3294                                  int     width,
3295                                  int     height,
3296                                  int     vsb_width,
3297                                  int     hsb_height)
3298 {
3299         GtkBorder border;
3300         gint doc_width, doc_height;
3301         gdouble scale;
3302         gint other_page;
3303
3304         other_page = view->current_page ^ 1;
3305
3306         /* Find the largest of the two. */
3307         ev_page_cache_get_size (view->page_cache,
3308                                 view->current_page,
3309                                 view->rotation,
3310                                 1.0,
3311                                 &doc_width, &doc_height);
3312
3313         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
3314                 gint width_2, height_2;
3315                 ev_page_cache_get_size (view->page_cache,
3316                                         other_page,
3317                                         view->rotation,
3318                                         1.0,
3319                                         &width_2, &height_2);
3320                 if (width_2 > doc_width)
3321                         doc_width = width_2;
3322                 if (height_2 > doc_height)
3323                         doc_height = height_2;
3324         }
3325         compute_border (view, doc_width, doc_height, &border);
3326
3327         doc_width = doc_width * 2;
3328         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
3329         height -= (border.top + border.bottom + 2 * view->spacing);
3330
3331         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3332                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
3333         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3334                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
3335         else
3336                 g_assert_not_reached ();
3337
3338         ev_view_set_zoom (view, scale, FALSE);
3339 }
3340
3341 static void
3342 ev_view_zoom_for_size_single_page (EvView *view,
3343                                    int     width,
3344                                    int     height,
3345                                    int     vsb_width,
3346                                    int     hsb_height)
3347 {
3348         int doc_width, doc_height;
3349         GtkBorder border;
3350         gdouble scale;
3351
3352         ev_page_cache_get_size (view->page_cache,
3353                                 view->current_page,
3354                                 view->rotation,
3355                                 1.0,
3356                                 &doc_width,
3357                                 &doc_height);
3358         /* Get an approximate border */
3359         compute_border (view, width, height, &border);
3360
3361         width -= (border.left + border.right + 2 * view->spacing);
3362         height -= (border.top + border.bottom + 2 * view->spacing);
3363
3364         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3365                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
3366         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3367                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
3368         else
3369                 g_assert_not_reached ();
3370
3371         ev_view_set_zoom (view, scale, FALSE);
3372 }
3373
3374 void
3375 ev_view_set_zoom_for_size (EvView *view,
3376                            int     width,
3377                            int     height,
3378                            int     vsb_width,
3379                            int     hsb_height)
3380 {
3381         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3382                           view->sizing_mode == EV_SIZING_BEST_FIT);
3383         g_return_if_fail (width >= 0);
3384         g_return_if_fail (height >= 0);
3385
3386         if (view->document == NULL)
3387                 return;
3388
3389         if (view->presentation)
3390                 ev_view_zoom_for_size_presentation (view, width, height);
3391         else if (view->continuous && view->dual_page)
3392                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
3393         else if (view->continuous)
3394                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
3395         else if (view->dual_page)
3396                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
3397         else
3398                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
3399 }
3400
3401 /*** Status text messages ***/
3402
3403 const char *
3404 ev_view_get_status (EvView *view)
3405 {
3406         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
3407
3408         return view->status;
3409 }
3410
3411 static void
3412 ev_view_set_status (EvView *view, const char *message)
3413 {
3414         g_return_if_fail (EV_IS_VIEW (view));
3415
3416         if (message != view->status) {
3417                 g_free (view->status);
3418                 view->status = g_strdup (message);
3419                 g_object_notify (G_OBJECT (view), "status");
3420         }
3421 }
3422
3423 static void
3424 update_find_status_message (EvView *view, gboolean this_page)
3425 {
3426         char *message;
3427
3428         if (this_page) {
3429                 int results;
3430
3431                 results = ev_document_find_get_n_results
3432                                 (EV_DOCUMENT_FIND (view->document),
3433                                  view->current_page);
3434                 /* TRANS: Sometimes this could be better translated as
3435                    "%d hit(s) on this page".  Therefore this string
3436                    contains plural cases. */
3437                 message = g_strdup_printf (ngettext ("%d found on this page",
3438                                                      "%d found on this page",
3439                                                      results),
3440                                            results);
3441         } else {
3442                 double percent;
3443
3444                 percent = ev_document_find_get_progress
3445                                 (EV_DOCUMENT_FIND (view->document));
3446                 message = g_strdup_printf (_("%3d%% remaining to search"),
3447                                            (int) ((1.0 - percent) * 100));
3448
3449         }
3450         ev_view_set_find_status (view, message);
3451         g_free (message);
3452 }
3453
3454 const char *
3455 ev_view_get_find_status (EvView *view)
3456 {
3457         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
3458
3459         return view->find_status;
3460 }
3461
3462 static void
3463 ev_view_set_find_status (EvView *view, const char *message)
3464 {
3465         g_return_if_fail (EV_IS_VIEW (view));
3466
3467         g_free (view->find_status);
3468         view->find_status = g_strdup (message);
3469         g_object_notify (G_OBJECT (view), "find-status");
3470 }
3471
3472 /*** Find ***/
3473
3474 static void
3475 jump_to_find_result (EvView *view)
3476 {
3477         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3478         EvRectangle rect;
3479         GdkRectangle view_rect;
3480         int n_results;
3481         int page = view->current_page;
3482
3483         n_results = ev_document_find_get_n_results (find, page);
3484
3485         if (n_results > 0  && view->find_result < n_results) {
3486                 ev_document_find_get_result
3487                         (find, page, view->find_result, &rect);
3488
3489                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
3490                 ensure_rectangle_is_visible (view, &view_rect);
3491         }
3492 }
3493
3494 /**
3495  * jump_to_find_page
3496  * @view: #EvView instance
3497  * @direction: Direction to look
3498  * @shift: Shift from current page
3499  *
3500  * Jumps to the first page that has occurences of searched word.
3501  * Uses a direction where to look and a shift from current page.
3502  *
3503  */
3504 static void
3505 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
3506 {
3507         int n_pages, i;
3508
3509         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3510
3511         for (i = 0; i < n_pages; i++) {
3512                 int has_results;
3513                 int page;
3514
3515                 if (direction == EV_VIEW_FIND_NEXT)
3516                         page = view->current_page + i;
3517                 else
3518                         page = view->current_page - i;
3519                 page += shift;
3520
3521                 if (page >= n_pages) {
3522                         page = page - n_pages;
3523                 }
3524                 if (page < 0)
3525                         page = page + n_pages;
3526
3527                 has_results = ev_document_find_page_has_results
3528                                 (EV_DOCUMENT_FIND (view->document), page);
3529                 if (has_results == -1) {
3530                         break;
3531                 } else if (has_results == 1) {
3532                         ev_page_cache_set_current_page (view->page_cache, page);
3533                         break;
3534                 }
3535         }
3536 }
3537
3538 gboolean
3539 ev_view_can_find_next (EvView *view)
3540 {
3541         if (EV_IS_DOCUMENT_FIND (view->document)) {
3542                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3543                 int i, n_pages;
3544
3545                 n_pages = ev_page_cache_get_n_pages (view->page_cache);
3546                 for (i = 0; i < n_pages; i++) {
3547                         if (ev_document_find_get_n_results (find, i) > 0) {
3548                                 return TRUE;
3549                         }
3550                 }
3551         }
3552
3553         return FALSE;
3554 }
3555
3556 void
3557 ev_view_find_next (EvView *view)
3558 {
3559         int n_results, n_pages;
3560         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3561
3562         n_results = ev_document_find_get_n_results (find, view->current_page);
3563
3564         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3565
3566         view->find_result++;
3567
3568         if (view->find_result >= n_results) {
3569
3570                 view->find_result = 0;
3571                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
3572                 jump_to_find_result (view);
3573         } else {
3574                 jump_to_find_result (view);
3575                 gtk_widget_queue_draw (GTK_WIDGET (view));
3576         }
3577 }
3578
3579 gboolean
3580 ev_view_can_find_previous (EvView *view)
3581 {
3582         if (EV_IS_DOCUMENT_FIND (view->document)) {
3583                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3584                 int i, n_pages;
3585
3586                 n_pages = ev_page_cache_get_n_pages (view->page_cache);
3587                 for (i = n_pages - 1; i >= 0; i--) {
3588                         if (ev_document_find_get_n_results (find, i) > 0) {
3589                                 return TRUE;
3590                         }
3591                 }
3592         }
3593
3594         return FALSE;
3595 }
3596 void
3597 ev_view_find_previous (EvView *view)
3598 {
3599         int n_results, n_pages;
3600         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3601         EvPageCache *page_cache;
3602
3603         page_cache = ev_page_cache_get (view->document);
3604
3605         n_results = ev_document_find_get_n_results (find, view->current_page);
3606
3607         n_pages = ev_page_cache_get_n_pages (page_cache);
3608
3609         view->find_result--;
3610
3611         if (view->find_result < 0) {
3612
3613                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
3614                 view->find_result = ev_document_find_get_n_results (find, view->current_page) - 1;
3615                 jump_to_find_result (view);
3616         } else {
3617                 jump_to_find_result (view);
3618                 gtk_widget_queue_draw (GTK_WIDGET (view));
3619         }
3620 }
3621
3622 void ev_view_search_changed (EvView *view)
3623 {
3624         /* search string has changed, focus on new search result */
3625         view->jump_to_find_result = TRUE;
3626 }
3627
3628 /*** Selections ***/
3629
3630 /* compute_new_selection_rect/text calculates the area currently selected by
3631  * view_rect.  each handles a different mode;
3632  */
3633 static GList *
3634 compute_new_selection_rect (EvView       *view,
3635                             GdkPoint     *start,
3636                             GdkPoint     *stop)
3637 {
3638         GdkRectangle view_rect;
3639         int n_pages, i;
3640         GList *list = NULL;
3641
3642         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
3643
3644         view_rect.x = MIN (start->x, stop->x);
3645         view_rect.y = MIN (start->y, stop->y);
3646         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
3647         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
3648
3649         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3650
3651         for (i = 0; i < n_pages; i++) {
3652                 GdkRectangle page_area;
3653                 GtkBorder border;
3654
3655                 if (get_page_extents (view, i, &page_area, &border)) {
3656                         GdkRectangle overlap;
3657
3658                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
3659                                 EvViewSelection *selection;
3660
3661                                 selection = g_new0 (EvViewSelection, 1);
3662                                 selection->page = i;
3663                                 view_rect_to_doc_rect (view, &overlap, &page_area,
3664                                                        &(selection->rect));
3665
3666                                 list = g_list_append (list, selection);
3667                         }
3668                 }
3669         }
3670
3671         return list;
3672 }
3673
3674 static gboolean
3675 gdk_rectangle_point_in (GdkRectangle *rectangle,
3676                         GdkPoint     *point)
3677 {
3678         return rectangle->x <= point->x &&
3679                 rectangle->y <= point->y &&
3680                 point->x < rectangle->x + rectangle->width &&
3681                 point->y < rectangle->y + rectangle->height;
3682 }
3683
3684 static GList *
3685 compute_new_selection_text (EvView   *view,
3686                             GdkPoint *start,
3687                             GdkPoint *stop)
3688 {
3689         int n_pages, i, first, last;
3690         GList *list = NULL;
3691         EvViewSelection *selection;
3692         gint width, height;
3693         int start_page, end_page;
3694
3695         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
3696
3697         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3698
3699         /* First figure out the range of pages the selection
3700          * affects. */
3701         first = n_pages;
3702         last = 0;
3703         if (view->continuous) {
3704                 start_page = 0;
3705                 end_page = n_pages;
3706         } else if (view->dual_page) {
3707                 start_page = view->start_page;
3708                 end_page = view->end_page + 1;
3709         } else {
3710                 start_page = view->current_page;
3711                 end_page = view->current_page + 1;
3712         }
3713
3714         for (i = start_page; i < end_page; i++) {
3715                 GdkRectangle page_area;
3716                 GtkBorder border;
3717
3718                 get_page_extents (view, i, &page_area, &border);
3719                 if (gdk_rectangle_point_in (&page_area, start) ||
3720                     gdk_rectangle_point_in (&page_area, stop)) {
3721                         if (first == n_pages)
3722                                 first = i;
3723                         last = i;
3724                 }
3725
3726         }
3727
3728
3729
3730         /* Now create a list of EvViewSelection's for the affected
3731          * pages.  This could be an empty list, a list of just one
3732          * page or a number of pages.*/
3733         for (i = first; i < last + 1; i++) {
3734                 GdkRectangle page_area;
3735                 GtkBorder border;
3736                 GdkPoint *point;
3737
3738                 ev_page_cache_get_size (view->page_cache, i,
3739                                         view->rotation,
3740                                         1.0, &width, &height);
3741
3742                 selection = g_new0 (EvViewSelection, 1);
3743                 selection->page = i;
3744                 selection->rect.x1 = selection->rect.y1 = 0;
3745                 selection->rect.x2 = width;
3746                 selection->rect.y2 = height;
3747
3748                 get_page_extents (view, i, &page_area, &border);
3749
3750                 if (gdk_rectangle_point_in (&page_area, start))
3751                         point = start;
3752                 else
3753                         point = stop;
3754
3755                 if (i == first)
3756                         view_point_to_doc_point (view, point, &page_area,
3757                                                  &selection->rect.x1,
3758                                                  &selection->rect.y1);
3759
3760                 /* If the selection is contained within just one page,
3761                  * make sure we don't write 'start' into both points
3762                  * in selection->rect. */
3763                 if (first == last)
3764                         point = stop;
3765
3766                 if (i == last)
3767                         view_point_to_doc_point (view, point, &page_area,
3768                                                  &selection->rect.x2,
3769                                                  &selection->rect.y2);
3770
3771                 list = g_list_append (list, selection);
3772         }
3773
3774         return list;
3775 }
3776
3777 /* This function takes the newly calculated list, and figures out which regions
3778  * have changed.  It then queues a redraw approporiately.
3779  */
3780 static void
3781 merge_selection_region (EvView *view,
3782                         GList  *new_list)
3783 {
3784         GList *old_list;
3785         GList *new_list_ptr, *old_list_ptr;
3786
3787         /* Update the selection */
3788         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
3789         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
3790         view->selection_info.selections = new_list;
3791         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
3792         g_object_notify (G_OBJECT (view), "has-selection");
3793
3794         new_list_ptr = new_list;
3795         old_list_ptr = old_list;
3796
3797         while (new_list_ptr || old_list_ptr) {
3798                 EvViewSelection *old_sel, *new_sel;
3799                 int cur_page;
3800                 GdkRegion *region = NULL;
3801
3802                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
3803                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
3804
3805                 /* Assume that the lists are in order, and we run through them
3806                  * comparing them, one page at a time.  We come out with the
3807                  * first page we see. */
3808                 if (new_sel && old_sel) {
3809                         if (new_sel->page < old_sel->page) {
3810                                 new_list_ptr = new_list_ptr->next;
3811                                 old_sel = NULL;
3812                         } else if (new_sel->page > old_sel->page) {
3813                                 old_list_ptr = old_list_ptr->next;
3814                                 new_sel = NULL;
3815                         } else {
3816                                 new_list_ptr = new_list_ptr->next;
3817                                 old_list_ptr = old_list_ptr->next;
3818                         }
3819                 } else if (new_sel) {
3820                         new_list_ptr = new_list_ptr->next;
3821                 } else if (old_sel) {
3822                         old_list_ptr = old_list_ptr->next;
3823                 }
3824
3825                 g_assert (new_sel || old_sel);
3826
3827                 /* is the page we're looking at on the screen?*/
3828                 cur_page = new_sel ? new_sel->page : old_sel->page;
3829                 if (cur_page < view->start_page || cur_page > view->end_page)
3830                         continue;
3831
3832                 /* seed the cache with a new page.  We are going to need the new
3833                  * region too. */
3834                 if (new_sel) {
3835                         GdkRegion *tmp_region = NULL;
3836                         ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
3837                                                               cur_page,
3838                                                               view->scale,
3839                                                               &tmp_region);
3840                         if (tmp_region) {
3841                                 new_sel->covered_region = gdk_region_copy (tmp_region);
3842                         }
3843                 }
3844
3845                 /* Now we figure out what needs redrawing */
3846                 if (old_sel && new_sel) {
3847                         if (old_sel->covered_region &&
3848                             new_sel->covered_region) {
3849                                 /* We only want to redraw the areas that have
3850                                  * changed, so we xor the old and new regions
3851                                  * and redraw if it's different */
3852                                 region = gdk_region_copy (old_sel->covered_region);
3853                                 gdk_region_xor (region, new_sel->covered_region);
3854                                 if (gdk_region_empty (region)) {
3855                                         gdk_region_destroy (region);
3856                                         region = NULL;
3857                                 }
3858                         } else if (old_sel->covered_region) {
3859                                 region = gdk_region_copy (old_sel->covered_region);
3860                         } else if (new_sel->covered_region) {
3861                                 region = gdk_region_copy (new_sel->covered_region);
3862                         }
3863                 } else if (old_sel && !new_sel) {
3864                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
3865                                 region = gdk_region_copy (old_sel->covered_region);
3866                         }
3867                 } else if (!old_sel && new_sel) {
3868                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
3869                                 region = gdk_region_copy (new_sel->covered_region);
3870                         }
3871                 } else {
3872                         g_assert_not_reached ();
3873                 }
3874
3875                 /* Redraw the damaged region! */
3876                 if (region) {
3877                         GdkRectangle page_area;
3878                         GtkBorder border;
3879
3880                         get_page_extents (view, cur_page, &page_area, &border);
3881                         gdk_region_offset (region,
3882                                            page_area.x + border.left - view->scroll_x,
3883                                            page_area.y + border.top - view->scroll_y);
3884                         gdk_window_invalidate_region (GTK_WIDGET (view)->window, region, TRUE);
3885                         gdk_region_destroy (region);
3886                 }
3887         }
3888
3889         /* Free the old list, now that we're done with it. */
3890         g_list_foreach (old_list, (GFunc) selection_free, NULL);
3891 }
3892
3893 static void
3894 compute_selections (EvView   *view,
3895                     GdkPoint *start,
3896                     GdkPoint *stop)
3897 {
3898         GList *list;
3899
3900         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
3901                 list = compute_new_selection_rect (view, start, stop);
3902         else
3903                 list = compute_new_selection_text (view, start, stop);
3904         merge_selection_region (view, list);
3905 }
3906
3907 /* Free's the selection.  It's up to the caller to queue redraws if needed.
3908  */
3909 static void
3910 selection_free (EvViewSelection *selection)
3911 {
3912         if (selection->covered_region)
3913                 gdk_region_destroy (selection->covered_region);
3914         g_free (selection);
3915 }
3916
3917 static void
3918 clear_selection (EvView *view)
3919 {
3920         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
3921         view->selection_info.selections = NULL;
3922         view->selection_info.in_selection = FALSE;
3923         g_object_notify (G_OBJECT (view), "has-selection");
3924 }
3925
3926
3927 void
3928 ev_view_select_all (EvView *view)
3929 {
3930         int n_pages, i;
3931
3932         /* Disable selection on rotated pages for the 0.4.0 series */
3933         if (view->rotation != 0)
3934                 return;
3935
3936         clear_selection (view);
3937
3938         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3939         for (i = 0; i < n_pages; i++) {
3940                 int width, height;
3941                 EvViewSelection *selection;
3942
3943                 ev_page_cache_get_size (view->page_cache,
3944                                         i,
3945                                         view->rotation,
3946                                         1.0, &width, &height);
3947
3948                 selection = g_new0 (EvViewSelection, 1);
3949                 selection->page = i;
3950                 selection->rect.x1 = selection->rect.y1 = 0;
3951                 selection->rect.x2 = width;
3952                 selection->rect.y2 = height;
3953
3954                 view->selection_info.selections = g_list_append (view->selection_info.selections, selection);
3955         }
3956
3957         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, view->selection_info.selections);
3958         g_object_notify (G_OBJECT (view), "has-selection");
3959         gtk_widget_queue_draw (GTK_WIDGET (view));
3960 }
3961
3962 gboolean
3963 ev_view_get_has_selection (EvView *view)
3964 {
3965         return view->selection_info.selections != NULL;
3966 }
3967
3968 static char *
3969 get_selected_text (EvView *ev_view)
3970 {
3971         GString *text;
3972         GList *l;
3973
3974         text = g_string_new (NULL);
3975
3976         ev_document_doc_mutex_lock ();
3977
3978         for (l = ev_view->selection_info.selections; l != NULL; l = l->next) {
3979                 EvViewSelection *selection = (EvViewSelection *)l->data;
3980                 char *tmp;
3981
3982                 tmp = ev_document_get_text (ev_view->document,
3983                                             selection->page,
3984                                             &selection->rect);
3985                 g_string_append (text, tmp);
3986                 g_free (tmp);
3987         }
3988
3989         ev_document_doc_mutex_unlock ();
3990
3991         return g_string_free (text, FALSE);
3992 }
3993
3994 void
3995 ev_view_copy (EvView *ev_view)
3996 {
3997         GtkClipboard *clipboard;
3998         char *text;
3999
4000         if (!ev_document_can_get_text (ev_view->document)) {
4001                 return;
4002         }
4003
4004         text = get_selected_text (ev_view);
4005         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
4006                                               GDK_SELECTION_CLIPBOARD);
4007         gtk_clipboard_set_text (clipboard, text, -1);
4008         g_free (text);
4009 }
4010
4011 static void
4012 ev_view_primary_get_cb (GtkClipboard     *clipboard,
4013                         GtkSelectionData *selection_data,
4014                         guint             info,
4015                         gpointer          data)
4016 {
4017         EvView *ev_view = EV_VIEW (data);
4018         char *text;
4019
4020         if (!ev_document_can_get_text (ev_view->document)) {
4021                 return;
4022         }
4023
4024         text = get_selected_text (ev_view);
4025         gtk_selection_data_set_text (selection_data, text, -1);
4026         g_free (text);
4027 }
4028
4029 static void
4030 ev_view_primary_clear_cb (GtkClipboard *clipboard,
4031                           gpointer      data)
4032 {
4033         EvView *view = EV_VIEW (data);
4034
4035         clear_selection (view);
4036 }
4037
4038 static void
4039 ev_view_update_primary_selection (EvView *ev_view)
4040 {
4041         GtkClipboard *clipboard;
4042
4043         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
4044                                               GDK_SELECTION_PRIMARY);
4045
4046         if (ev_view->selection_info.selections) {
4047                 if (!gtk_clipboard_set_with_owner (clipboard,
4048                                                    targets,
4049                                                    G_N_ELEMENTS (targets),
4050                                                    ev_view_primary_get_cb,
4051                                                    ev_view_primary_clear_cb,
4052                                                    G_OBJECT (ev_view)))
4053                         ev_view_primary_clear_cb (clipboard, ev_view);
4054         } else {
4055                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
4056                         gtk_clipboard_clear (clipboard);
4057         }
4058 }
4059
4060 /*** Cursor operations ***/
4061
4062 static GdkCursor *
4063 ev_view_create_invisible_cursor(void)
4064 {
4065        GdkBitmap *empty;
4066        GdkColor black = { 0, 0, 0, 0 };
4067        static char bits[] = { 0x00 };
4068
4069        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
4070
4071        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
4072 }
4073
4074 static void
4075 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
4076 {
4077         GdkCursor *cursor = NULL;
4078         GdkDisplay *display;
4079         GtkWidget *widget;
4080
4081         if (view->cursor == new_cursor) {
4082                 return;
4083         }
4084
4085         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
4086         display = gtk_widget_get_display (widget);
4087         view->cursor = new_cursor;
4088
4089         switch (new_cursor) {
4090                 case EV_VIEW_CURSOR_NORMAL:
4091                         gdk_window_set_cursor (widget->window, NULL);
4092                         break;
4093                 case EV_VIEW_CURSOR_IBEAM:
4094                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
4095                         break;
4096                 case EV_VIEW_CURSOR_LINK:
4097                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
4098                         break;
4099                 case EV_VIEW_CURSOR_WAIT:
4100                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
4101                         break;
4102                 case EV_VIEW_CURSOR_HIDDEN:
4103                         cursor = ev_view_create_invisible_cursor ();
4104                         break;
4105                 case EV_VIEW_CURSOR_DRAG:
4106                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
4107                         break;
4108         }
4109
4110         if (cursor) {
4111                 gdk_window_set_cursor (widget->window, cursor);
4112                 gdk_cursor_unref (cursor);
4113                 gdk_flush();
4114         }
4115 }
4116
4117 void
4118 ev_view_hide_cursor (EvView *view)
4119 {
4120        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
4121 }
4122
4123 void
4124 ev_view_show_cursor (EvView *view)
4125 {
4126        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4127 }
4128
4129 gboolean
4130 ev_view_next_page (EvView *view)
4131 {
4132         int page;
4133
4134         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4135
4136         if (!view->page_cache)
4137                 return FALSE;
4138
4139         page = ev_page_cache_get_current_page (view->page_cache);
4140
4141         if (view->dual_page && !view->presentation)
4142                 page = page + 2;
4143         else
4144                 page = page + 1;
4145
4146         if (page < ev_page_cache_get_n_pages (view->page_cache)) {
4147                 ev_page_cache_set_current_page (view->page_cache, page);
4148                 return TRUE;
4149         } else if (ev_view_get_dual_page (view) && page == ev_page_cache_get_n_pages (view->page_cache)) {
4150                 ev_page_cache_set_current_page (view->page_cache, page - 1);
4151                 return TRUE;
4152         } else {
4153                 return FALSE;
4154         }
4155 }
4156
4157 gboolean
4158 ev_view_previous_page (EvView *view)
4159 {
4160         int page;
4161
4162         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4163
4164         if (!view->page_cache)
4165                 return FALSE;
4166
4167         page = ev_page_cache_get_current_page (view->page_cache);
4168
4169         if (view->dual_page && !view->presentation)
4170                 page = page - 2;
4171         else
4172                 page = page - 1;
4173
4174         if (page >= 0) {
4175                 ev_page_cache_set_current_page (view->page_cache, page);
4176                 return TRUE;
4177         } else if (ev_view_get_dual_page (view) && page == -1) {
4178                 ev_page_cache_set_current_page (view->page_cache, 0);
4179                 return TRUE;
4180         } else {
4181                 return FALSE;
4182         }
4183 }
4184
4185 /*** Enum description for usage in signal ***/
4186
4187 GType
4188 ev_sizing_mode_get_type (void)
4189 {
4190   static GType etype = 0;
4191   if (etype == 0) {
4192     static const GEnumValue values[] = {
4193       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
4194       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
4195       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
4196       { 0, NULL, NULL }
4197     };
4198     etype = g_enum_register_static ("EvSizingMode", values);
4199   }
4200   return etype;
4201 }
4202
4203 GType
4204 ev_scroll_type_get_type (void)
4205 {
4206   static GType etype = 0;
4207   if (etype == 0) {
4208     static const GEnumValue values[] = {
4209       { EV_SCROLL_PAGE_FORWARD, "EV_SCROLL_PAGE_FORWARD", "scroll-page-forward" },
4210       { EV_SCROLL_PAGE_BACKWARD, "EV_SCROLL_PAGE_BACKWARD", "scroll-page-backward" },
4211       { EV_SCROLL_STEP_FORWARD, "EV_SCROLL_STEP_FORWARD", "scroll-step-forward" },
4212       { EV_SCROLL_STEP_FORWARD, "EV_SCROLL_STEP_FORWARD", "scroll-step-forward" },
4213       { EV_SCROLL_STEP_UP, "EV_SCROLL_STEP_UP", "scroll-step-up" },
4214       { EV_SCROLL_STEP_DOWN, "EV_SCROLL_STEP_DOWN", "scroll-step-down" },
4215       { 0, NULL, NULL }
4216     };
4217     etype = g_enum_register_static ("EvScrollType", values);
4218   }
4219   return etype;
4220 }