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                 case SCROLL_TO_FIND_LOCATION:
 390                         factor = (adjustment->value) / adjustment->upper;
 391                         break;
 392                 case SCROLL_TO_PAGE_POSITION:
 393                         break;
 394                 case SCROLL_TO_CENTER:
 395                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 396                         break;
 397         }
 398
 399         adjustment->page_size = allocation;
 400         adjustment->step_increment = allocation * 0.1;
 401         adjustment->page_increment = allocation * 0.9;
 402         adjustment->lower = 0;
 403         adjustment->upper = MAX (allocation, requisition);
 404
 405         /*
 406          * We add 0.5 to the values before to average out our rounding errors.
 407          */
 408         switch (view->pending_scroll) {
 409                 case SCROLL_TO_KEEP_POSITION:
 410                 case SCROLL_TO_FIND_LOCATION:
 411                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 412                         gtk_adjustment_set_value (adjustment, (int)new_value);
 413                         break;
 414                 case SCROLL_TO_PAGE_POSITION:
 415                         scroll_to_current_page (view, orientation);
 416                         break;
 417                 case SCROLL_TO_CENTER:
 418                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 419                                            0, adjustment->upper - adjustment->page_size);
 420                         gtk_adjustment_set_value (adjustment, (int)new_value);
 421                         break;
 422         }
 423
 424         gtk_adjustment_changed (adjustment);
 425 }
 426
 427 static void
 428 view_update_range_and_current_page (EvView *view)
 429 {
 430         gint current_page;
 431         gint best_current_page = -1;
 432
 433         /* Presentation trumps all other modes */
 434         if (view->presentation) {
 435                 view->start_page = view->current_page;
 436                 view->end_page = view->current_page;
 437         } else if (view->continuous) {
 438                 GdkRectangle current_area, unused, page_area;
 439                 GtkBorder border;
 440                 gboolean found = FALSE;
 441                 gint area_max = -1, area;
 442                 int i;
 443
 444                 if (!(view->vadjustment && view->hadjustment))
 445                         return;
 446
 447                 current_area.x = view->hadjustment->value;
 448                 current_area.width = view->hadjustment->upper;
 449                 current_area.y = view->vadjustment->value;
 450                 current_area.height = view->vadjustment->page_size;
 451
 452                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 453
 454                         get_page_extents (view, i, &page_area, &border);
 455
 456                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 457                                 area = unused.width * unused.height;
 458
 459                                 if (!found) {
 460                                         area_max = area;
 461                                         view->start_page = i;
 462                                         found = TRUE;
 463                                         best_current_page = i;
 464                                 }
 465                                 if (area > area_max) {
 466                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 467                                         area_max = area;
 468                                 }
 469
 470                                 view->end_page = i;
 471                         } else if (found) {
 472                                 break;
 473                         }
 474                 }
 475
 476         } else if (view->dual_page) {
 477                 if (view->current_page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) {
 478                         view->start_page = view->current_page;
 479                         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 480                                 view->end_page = view->start_page + 1;
 481                         else
 482                                 view->end_page = view->start_page;
 483                 } else {
 484                         if (view->current_page < 1)
 485                                 view->start_page = view->current_page;
 486                         else
 487                                 view->start_page = view->current_page - 1;
 488                         view->end_page = view->current_page;
 489                 }
 490         } else {
 491                 view->start_page = view->current_page;
 492                 view->end_page = view->current_page;
 493         }
 494
 495         best_current_page = MAX (best_current_page, view->start_page);
 496         current_page = ev_page_cache_get_current_page (view->page_cache);
 497
 498         if ((current_page != best_current_page) && (view->pending_scroll == SCROLL_TO_KEEP_POSITION)) {
 499                 view->current_page = best_current_page;
 500                 ev_page_cache_set_current_page (view->page_cache, best_current_page);
 501         }
 502
 503         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 504                                         view->start_page,
 505                                         view->end_page,
 506                                         view->rotation,
 507                                         view->scale,
 508                                         view->selection_info.selections);
 509 }
 510
 511 static void
 512 set_scroll_adjustment (EvView *view,
 513                        GtkOrientation  orientation,
 514                        GtkAdjustment  *adjustment)
 515 {
 516         GtkAdjustment **to_set;
 517
 518         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 519                 to_set = &view->hadjustment;
 520         else
 521                 to_set = &view->vadjustment;
 522
 523         if (*to_set != adjustment) {
 524                 if (*to_set) {
 525                         g_signal_handlers_disconnect_by_func (*to_set,
 526                                                               (gpointer) on_adjustment_value_changed,
 527                                                               view);
 528                         g_object_unref (*to_set);
 529                 }
 530
 531                 *to_set = adjustment;
 532                 view_set_adjustment_values (view, orientation);
 533
 534                 if (*to_set) {
 535                         g_object_ref (*to_set);
 536                         g_signal_connect (*to_set, "value_changed",
 537                                           G_CALLBACK (on_adjustment_value_changed), view);
 538                 }
 539         }
 540 }
 541
 542 static void
 543 ev_view_set_scroll_adjustments (EvView *view,
 544                                 GtkAdjustment  *hadjustment,
 545                                 GtkAdjustment  *vadjustment)
 546 {
 547         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 548         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 549
 550         on_adjustment_value_changed (NULL, view);
 551 }
 552
 553 static void
 554 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 555                            guint           keyval,
 556                            GdkModifierType modifiers,
 557                            EvScrollType    scroll,
 558                            gboolean        horizontal)
 559 {
 560   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 561
 562   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 563                                 "binding_activated", 2,
 564                                 EV_TYPE_SCROLL_TYPE, scroll,
 565                                 G_TYPE_BOOLEAN, horizontal);
 566   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 567                                 "binding_activated", 2,
 568                                 EV_TYPE_SCROLL_TYPE, scroll,
 569                                 G_TYPE_BOOLEAN, horizontal);
 570 }
 571
 572 void
 573 ev_view_scroll (EvView        *view,
 574                 EvScrollType   scroll,
 575                 gboolean horizontal)
 576 {
 577         GtkAdjustment *adjustment;
 578         double value, increment;
 579         gboolean first_page = FALSE;
 580         gboolean last_page = FALSE;
 581
 582         view->jump_to_find_result = FALSE;
 583
 584         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 585                 switch (scroll) {
 586                         case EV_SCROLL_PAGE_BACKWARD:
 587                         case EV_SCROLL_STEP_BACKWARD:
 588                                 ev_view_previous_page (view);
 589                                 break;
 590                         case EV_SCROLL_PAGE_FORWARD:
 591                         case EV_SCROLL_STEP_FORWARD:
 592                                 ev_view_next_page (view);
 593                                 break;
 594                         default:
 595                                 break;
 596                 }
 597                 return;
 598         }
 599
 600         /* Assign values for increment and vertical adjustment */
 601         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 602         increment = adjustment->page_size * 0.75;
 603         value = adjustment->value;
 604
 605         /* Assign boolean for first and last page */
 606         if (view->current_page == 0)
 607                 first_page = TRUE;
 608         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 609                 last_page = TRUE;
 610
 611         switch (scroll) {
 612                 case EV_SCROLL_PAGE_BACKWARD:
 613                         /* Do not jump backwards if at the first page */
 614                         if (value == (adjustment->lower) && first_page) {
 615                                 /* Do nothing */
 616                                 /* At the top of a page, assign the upper bound limit of previous page */
 617                         } else if (value == (adjustment->lower)) {
 618                                 value = adjustment->upper - adjustment->page_size;
 619                                 ev_view_previous_page (view);
 620                                 /* Jump to the top */
 621                         } else {
 622                                 value = MAX (value - increment, adjustment->lower);
 623                         }
 624                         break;
 625                 case EV_SCROLL_PAGE_FORWARD:
 626                         /* Do not jump forward if at the last page */
 627                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 628                                 /* Do nothing */
 629                         /* At the bottom of a page, assign the lower bound limit of next page */
 630                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 631                                 value = 0;
 632                                 ev_view_next_page (view);
 633                         /* Jump to the bottom */
 634                         } else {
 635                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 636                         }
 637                         break;
 638                 case EV_SCROLL_STEP_BACKWARD:
 639                         value -= adjustment->step_increment;
 640                         break;
 641                 case EV_SCROLL_STEP_FORWARD:
 642                         value += adjustment->step_increment;
 643                         break;
 644                 case EV_SCROLL_STEP_DOWN:
 645                         value -= adjustment->step_increment / 10;
 646                         break;
 647                 case EV_SCROLL_STEP_UP:
 648                         value += adjustment->step_increment / 10;
 649                         break;
 650                 default:
 651                         break;
 652         }
 653
 654         value = CLAMP (value, adjustment->lower,
 655                        adjustment->upper - adjustment->page_size);
 656
 657         gtk_adjustment_set_value (adjustment, value);
 658 }
 659
 660 #define MARGIN 5
 661
 662 static void
 663 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 664 {
 665         GtkWidget *widget = GTK_WIDGET (view);
 666         GtkAdjustment *adjustment;
 667         int value;
 668
 669         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 670
 671         adjustment = view->vadjustment;
 672
 673         if (rect->y < adjustment->value) {
 674                 value = MAX (adjustment->lower, rect->y - MARGIN);
 675                 gtk_adjustment_set_value (view->vadjustment, value);
 676         } else if (rect->y + rect->height >
 677                    adjustment->value + widget->allocation.height) {
 678                 value = MIN (adjustment->upper, rect->y + rect->height -
 679                              widget->allocation.height + MARGIN);
 680                 gtk_adjustment_set_value (view->vadjustment, value);
 681         }
 682
 683         adjustment = view->hadjustment;
 684
 685         if (rect->x < adjustment->value) {
 686                 value = MAX (adjustment->lower, rect->x - MARGIN);
 687                 gtk_adjustment_set_value (view->hadjustment, value);
 688         } else if (rect->x + rect->height >
 689                    adjustment->value + widget->allocation.width) {
 690                 value = MIN (adjustment->upper, rect->x + rect->width -
 691                              widget->allocation.width + MARGIN);
 692                 gtk_adjustment_set_value (view->hadjustment, value);
 693         }
 694
 695         gtk_widget_queue_resize (GTK_WIDGET (view));
 696 }
 697
 698 /*** Geometry computations ***/
 699
 700 static void
 701 compute_border (EvView *view, int width, int height, GtkBorder *border)
 702 {
 703         if (view->presentation) {
 704                 border->left = 0;
 705                 border->right = 0;
 706                 border->top = 0;
 707                 border->bottom = 0;
 708         } else {
 709                 ev_document_misc_get_page_border_size (width, height, border);
 710         }
 711 }
 712
 713 static void
 714 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 715 {
 716         int max_width, offset;
 717         GtkBorder border;
 718
 719         g_return_if_fail (y_offset != NULL);
 720
 721         ev_page_cache_get_max_width (view->page_cache, view->rotation, zoom, &max_width);
 722
 723         compute_border (view, max_width, max_width, &border);
 724
 725         if (view->dual_page) {
 726                 ev_page_cache_get_height_to_page (view->page_cache, page,
 727                                                   view->rotation, zoom, NULL, &offset);
 728                 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);
 729         } else {
 730                 ev_page_cache_get_height_to_page (view->page_cache, page,
 731                                                   view->rotation, zoom, &offset, NULL);
 732                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 733         }
 734
 735         *y_offset = offset;
 736         return;
 737 }
 738
 739 static gboolean
 740 get_page_extents (EvView       *view,
 741                   gint          page,
 742                   GdkRectangle *page_area,
 743                   GtkBorder    *border)
 744 {
 745         GtkWidget *widget;
 746         int width, height;
 747
 748         widget = GTK_WIDGET (view);
 749
 750         /* Get the size of the page */
 751         ev_page_cache_get_size (view->page_cache, page,
 752                                 view->rotation,
 753                                 view->scale,
 754                                 &width, &height);
 755         compute_border (view, width, height, border);
 756         page_area->width = width + border->left + border->right;
 757         page_area->height = height + border->top + border->bottom;
 758
 759         if (view->presentation) {
 760                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 761                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 762         } else if (view->continuous) {
 763                 gint max_width;
 764                 gint x, y;
 765
 766                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 767                                              view->scale, &max_width);
 768                 max_width = max_width + border->left + border->right;
 769                 /* Get the location of the bounding box */
 770                 if (view->dual_page) {
 771                         x = view->spacing + ((page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? 0 : 1) * (max_width + view->spacing);
 772                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 773                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 774                                 x = x + (max_width - width - border->left - border->right);
 775                 } else {
 776                         x = view->spacing;
 777                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 778                 }
 779
 780                 get_page_y_offset (view, page, view->scale, &y);
 781
 782                 page_area->x = x;
 783                 page_area->y = y;
 784         } else {
 785                 gint x, y;
 786                 if (view->dual_page) {
 787                         gint width_2, height_2;
 788                         gint max_width = width;
 789                         gint max_height = height;
 790                         GtkBorder overall_border;
 791                         gint other_page;
 792
 793                         other_page = (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? page + 1: page - 1;
 794
 795                         /* First, we get the bounding box of the two pages */
 796                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)
 797                             && (0 <= other_page)) {
 798                                 ev_page_cache_get_size (view->page_cache,
 799                                                         other_page,
 800                                                         view->rotation,
 801                                                         view->scale,
 802                                                         &width_2, &height_2);
 803                                 if (width_2 > width)
 804                                         max_width = width_2;
 805                                 if (height_2 > height)
 806                                         max_height = height_2;
 807                         }
 808                         compute_border (view, max_width, max_height, &overall_border);
 809
 810                         /* Find the offsets */
 811                         x = view->spacing;
 812                         y = view->spacing;
 813
 814                         /* Adjust for being the left or right page */
 815                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 816                                 x = x + max_width - width;
 817                         else
 818                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 819
 820                         y = y + (max_height - height)/2;
 821
 822                         /* Adjust for extra allocation */
 823                         x = x + MAX (0, widget->allocation.width -
 824                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 825                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 826                 } else {
 827                         x = view->spacing;
 828                         y = view->spacing;
 829
 830                         /* Adjust for extra allocation */
 831                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 832                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 833                 }
 834
 835                 page_area->x = x;
 836                 page_area->y = y;
 837         }
 838
 839         return TRUE;
 840 }
 841
 842 static void
 843 view_point_to_doc_point (EvView *view,
 844                          GdkPoint *view_point,
 845                          GdkRectangle *page_area,
 846                          double  *doc_point_x,
 847                          double  *doc_point_y)
 848 {
 849         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 850         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 851 }
 852
 853 static void
 854 view_rect_to_doc_rect (EvView *view,
 855                        GdkRectangle *view_rect,
 856                        GdkRectangle *page_area,
 857                        EvRectangle  *doc_rect)
 858 {
 859         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 860         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 861         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 862         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 863 }
 864
 865 static gboolean
 866 doc_point_to_view_point (EvView       *view,
 867                          int           page,
 868                          EvPoint      *doc_point,
 869                          GdkPoint     *view_point)
 870 {
 871         GdkRectangle page_area;
 872         GtkBorder border;
 873         double x, y, view_x, view_y;
 874         int width, height;
 875
 876         ev_page_cache_get_size (view->page_cache, page,
 877                                 view->rotation,
 878                                 1.0,
 879                                 &width, &height);
 880
 881         if (view->rotation == 0) {
 882                 x = doc_point->x;
 883                 y = doc_point->y;
 884         } else if (view->rotation == 90) {
 885                 x = width - doc_point->y;
 886                 y = doc_point->x;
 887         } else if (view->rotation == 180) {
 888                 x = width - doc_point->x;
 889                 y = height - doc_point->y;
 890         } else if (view->rotation == 270) {
 891                 x = doc_point->y;
 892                 y = height - doc_point->x;
 893         } else {
 894                 g_assert_not_reached ();
 895         }
 896
 897         get_page_extents (view, page, &page_area, &border);
 898
 899         view_x = x * view->scale;
 900         view_y = y * view->scale;
 901         view_point->x = view_x + page_area.x;
 902         view_point->y = view_y + page_area.y;
 903
 904         return (view_x > 0 && view_x <= page_area.width &&
 905                 view_y > 0 && view_y <= page_area.height);
 906 }
 907
 908 static void
 909 doc_rect_to_view_rect (EvView       *view,
 910                        int           page,
 911                        EvRectangle  *doc_rect,
 912                        GdkRectangle *view_rect)
 913 {
 914         GdkRectangle page_area;
 915         GtkBorder border;
 916         double x, y, w, h;
 917         int width, height;
 918
 919         ev_page_cache_get_size (view->page_cache, page,
 920                                 view->rotation,
 921                                 1.0,
 922                                 &width, &height);
 923
 924         if (view->rotation == 0) {
 925                 x = doc_rect->x1;
 926                 y = doc_rect->y1;
 927                 w = doc_rect->x2 - doc_rect->x1;
 928                 h = doc_rect->y2 - doc_rect->y1;
 929         } else if (view->rotation == 90) {
 930                 x = width - doc_rect->y2;
 931                 y = doc_rect->x1;
 932                 w = doc_rect->y2 - doc_rect->y1;
 933                 h = doc_rect->x2 - doc_rect->x1;
 934         } else if (view->rotation == 180) {
 935                 x = width - doc_rect->x2;
 936                 y = height - doc_rect->y2;
 937                 w = doc_rect->x2 - doc_rect->x1;
 938                 h = doc_rect->y2 - doc_rect->y1;
 939         } else if (view->rotation == 270) {
 940                 x = doc_rect->y1;
 941                 y = height - doc_rect->x2;
 942                 w = doc_rect->y2 - doc_rect->y1;
 943                 h = doc_rect->x2 - doc_rect->x1;
 944         } else {
 945                 g_assert_not_reached ();
 946         }
 947
 948         get_page_extents (view, page, &page_area, &border);
 949
 950         view_rect->x = x * view->scale + page_area.x;
 951         view_rect->y = y * view->scale + page_area.y;
 952         view_rect->width = w * view->scale;
 953         view_rect->height = h * view->scale;
 954 }
 955
 956 static void
 957 find_page_at_location (EvView  *view,
 958                        gdouble  x,
 959                        gdouble  y,
 960                        gint    *page,
 961                        gint    *x_offset,
 962                        gint    *y_offset)
 963 {
 964         int i;
 965
 966         if (view->document == NULL)
 967                 return;
 968
 969         g_assert (page);
 970         g_assert (x_offset);
 971         g_assert (y_offset);
 972
 973         for (i = view->start_page; i <= view->end_page; i++) {
 974                 GdkRectangle page_area;
 975                 GtkBorder border;
 976
 977                 if (! get_page_extents (view, i, &page_area, &border))
 978                         continue;
 979
 980                 if ((x >= page_area.x + border.left) &&
 981                     (x < page_area.x + page_area.width - border.right) &&
 982                     (y >= page_area.y + border.top) &&
 983                     (y < page_area.y + page_area.height - border.bottom)) {
 984                         *page = i;
 985                         *x_offset = x - (page_area.x + border.left);
 986                         *y_offset = y - (page_area.y + border.top);
 987                         return;
 988                 }
 989         }
 990
 991         *page = -1;
 992 }
 993
 994 static gboolean
 995 location_in_text (EvView  *view,
 996                   gdouble  x,
 997                   gdouble  y)
 998 {
 999         GdkRegion *region;
1000         gint page = -1;
1001         gint x_offset = 0, y_offset = 0;
1002
1003         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1004
1005         if (page == -1)
1006                 return FALSE;
1007
1008         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1009
1010         if (region)
1011                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1012         else
1013                 return FALSE;
1014 }
1015
1016 static int
1017 ev_view_get_width (EvView *view)
1018 {
1019         return GTK_WIDGET (view)->allocation.width;
1020 }
1021
1022 static int
1023 ev_view_get_height (EvView *view)
1024 {
1025         return GTK_WIDGET (view)->allocation.height;
1026 }
1027
1028 static gboolean
1029 location_in_selected_text (EvView  *view,
1030                            gdouble  x,
1031                            gdouble  y)
1032 {
1033         gint page = -1;
1034         gint x_offset = 0, y_offset = 0;
1035         EvViewSelection *selection;
1036         GList *l = NULL;
1037
1038         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1039                 selection = (EvViewSelection *)l->data;
1040
1041                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1042
1043                 if (page != selection->page)
1044                         continue;
1045
1046                 if (selection->covered_region &&
1047                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1048                         return TRUE;
1049         }
1050
1051         return FALSE;
1052 }
1053
1054 static gboolean
1055 get_doc_point_from_offset (EvView *view,
1056                            gint    page,
1057                            gint    x_offset,
1058                            gint    y_offset,
1059                            gint   *x_new,
1060                            gint   *y_new)
1061 {
1062         int width, height;
1063         double x, y;
1064
1065         ev_page_cache_get_size (view->page_cache, page,
1066                                 view->rotation,
1067                                 1.0,
1068                                 &width, &height);
1069
1070         x_offset = x_offset / view->scale;
1071         y_offset = y_offset / view->scale;
1072
1073         if (view->rotation == 0) {
1074                 x = x_offset;
1075                 y = y_offset;
1076         } else if (view->rotation == 90) {
1077                 x = y_offset;
1078                 y = width - x_offset;
1079         } else if (view->rotation == 180) {
1080                 x = width - x_offset;
1081                 y = height - y_offset;
1082         } else if (view->rotation == 270) {
1083                 x = height - y_offset;
1084                 y = x_offset;
1085         } else {
1086                 g_assert_not_reached ();
1087         }
1088
1089         *x_new = x;
1090         *y_new = y;
1091
1092         return TRUE;
1093 }
1094
1095 /*** Hyperref ***/
1096 static EvLink *
1097 ev_view_get_link_at_location (EvView  *view,
1098                               gdouble  x,
1099                               gdouble  y)
1100 {
1101         gint page = -1;
1102         gint x_offset = 0, y_offset = 0;
1103         gint x_new = 0, y_new = 0;
1104         GList *link_mapping;
1105
1106         x += view->scroll_x;
1107         y += view->scroll_y;
1108
1109         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1110
1111         if (page == -1)
1112                 return NULL;
1113
1114
1115         if (get_doc_point_from_offset (view, page, x_offset,
1116                                        y_offset, &x_new, &y_new) == FALSE)
1117                 return NULL;
1118
1119         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1120
1121         if (link_mapping)
1122                 return ev_link_mapping_find (link_mapping, x_new, y_new);
1123         else
1124                 return NULL;
1125 }
1126
1127 static void
1128 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1129 {
1130         EvPoint doc_point;
1131         double zoom;
1132
1133         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - ev_link_dest_get_left (dest),
1134                                        ev_link_dest_get_bottom (dest) - ev_link_dest_get_top (dest),
1135                                        ev_view_get_width (view),
1136                                        ev_view_get_height (view), 0, 0);
1137
1138         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1139         ev_view_set_zoom (view, zoom, FALSE);
1140
1141         doc_point.x = ev_link_dest_get_left (dest);
1142         doc_point.y = ev_link_dest_get_top (dest);
1143
1144         view->current_page = ev_link_dest_get_page (dest);
1145         view->pending_point = doc_point;
1146         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1147
1148         gtk_widget_queue_resize (GTK_WIDGET (view));
1149 }
1150
1151 static void
1152 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1153 {
1154         EvPoint doc_point;
1155         int doc_width, doc_height, page;
1156         double zoom;
1157
1158         page = ev_link_dest_get_page (dest);
1159         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1160
1161         doc_point.x = ev_link_dest_get_left (dest);
1162         doc_point.y = 0;
1163
1164         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1165                                          ev_view_get_width (view),
1166                                          ev_view_get_height (view), 0);
1167
1168         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1169         ev_view_set_zoom (view, zoom, FALSE);
1170
1171         view->current_page = page;
1172         view->pending_point = doc_point;
1173         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1174
1175         gtk_widget_queue_resize (GTK_WIDGET (view));
1176 }
1177
1178 static void
1179 goto_fith_dest (EvView *view, EvLinkDest *dest)
1180 {
1181         EvPoint doc_point;
1182         int doc_width, doc_height, page;
1183         double zoom;
1184
1185         page = ev_link_dest_get_page (dest);
1186         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1187
1188         doc_point.x = 0;
1189         doc_point.y = ev_link_dest_get_top (dest);
1190
1191         zoom = zoom_for_size_fit_width (doc_width, ev_link_dest_get_top (dest),
1192                                         ev_view_get_width (view),
1193                                         ev_view_get_height (view), 0);
1194
1195         ev_view_set_sizing_mode (view, EV_SIZING_FIT_WIDTH);
1196         ev_view_set_zoom (view, zoom, FALSE);
1197
1198         view->current_page = page;
1199         view->pending_point = doc_point;
1200         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1201
1202         gtk_widget_queue_resize (GTK_WIDGET (view));
1203 }
1204
1205 static void
1206 goto_fit_dest (EvView *view, EvLinkDest *dest)
1207 {
1208         double zoom;
1209         int doc_width, doc_height;
1210         int page;
1211
1212         page = ev_link_dest_get_page (dest);
1213         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1214
1215         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1216                                        ev_view_get_height (view), 0, 0);
1217
1218         ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
1219         ev_view_set_zoom (view, zoom, FALSE);
1220
1221         view->current_page = page;
1222         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1223
1224         gtk_widget_queue_resize (GTK_WIDGET (view));
1225 }
1226
1227 static void
1228 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1229 {
1230         EvPoint doc_point;
1231         gint page;
1232         double zoom;
1233
1234         zoom = ev_link_dest_get_zoom (dest);
1235         page = ev_link_dest_get_page (dest);
1236
1237         if (zoom > 1) {
1238                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1239                 ev_view_set_zoom (view, zoom, FALSE);
1240         }
1241
1242         doc_point.x = ev_link_dest_get_left (dest);
1243         doc_point.y = ev_link_dest_get_top (dest);
1244
1245         view->current_page = page;
1246         view->pending_point = doc_point;
1247         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1248
1249         gtk_widget_queue_resize (GTK_WIDGET (view));
1250 }
1251
1252 static void
1253 goto_dest (EvView *view, EvLinkDest *dest)
1254 {
1255         EvLinkDestType type;
1256         int page, n_pages;
1257
1258         page = ev_link_dest_get_page (dest);
1259         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1260
1261         if (page < 0 || page >= n_pages)
1262                 return;
1263
1264         type = ev_link_dest_get_dest_type (dest);
1265
1266         switch (type) {
1267                 case EV_LINK_DEST_TYPE_PAGE:
1268                         ev_page_cache_set_current_page (view->page_cache, page);
1269                         break;
1270                 case EV_LINK_DEST_TYPE_FIT:
1271                         goto_fit_dest (view, dest);
1272                         break;
1273                 case EV_LINK_DEST_TYPE_FITH:
1274                         goto_fith_dest (view, dest);
1275                         break;
1276                 case EV_LINK_DEST_TYPE_FITV:
1277                         goto_fitv_dest (view, dest);
1278                         break;
1279                 case EV_LINK_DEST_TYPE_FITR:
1280                         goto_fitr_dest (view, dest);
1281                         break;
1282                 case EV_LINK_DEST_TYPE_XYZ:
1283                         goto_xyz_dest (view, dest);
1284                         break;
1285                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1286                         ev_page_cache_set_page_label (view->page_cache, ev_link_dest_get_page_label (dest));
1287                         break;
1288                 default:
1289                         g_assert_not_reached ();
1290         }
1291 }
1292
1293 void
1294 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1295 {
1296         EvLinkDestType type;
1297
1298         type = ev_link_dest_get_dest_type (dest);
1299
1300         if (type == EV_LINK_DEST_TYPE_NAMED) {
1301                 EvLinkDest  *dest2;
1302                 const gchar *named_dest;
1303
1304                 named_dest = ev_link_dest_get_named_dest (dest);
1305                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1306                                                           named_dest);
1307                 if (dest2) {
1308                         goto_dest (view, dest2);
1309                         g_object_unref (dest2);
1310                 }
1311
1312                 return;
1313         }
1314
1315         goto_dest (view, dest);
1316 }
1317
1318 void
1319 ev_view_handle_link (EvView *view, EvLink *link)
1320 {
1321         EvLinkAction    *action = NULL;
1322         EvLinkActionType type;
1323
1324         action = ev_link_get_action (link);
1325         if (!action)
1326                 return;
1327
1328         type = ev_link_action_get_action_type (action);
1329
1330         switch (type) {
1331                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1332                         EvLinkDest *dest;
1333
1334                         dest = ev_link_action_get_dest (action);
1335                         ev_view_goto_dest (view, dest);
1336                 }
1337                         break;
1338                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1339                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1340                 case EV_LINK_ACTION_TYPE_LAUNCH:
1341                 case EV_LINK_ACTION_TYPE_NAMED:
1342                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1343                         break;
1344         }
1345 }
1346
1347 static gchar *
1348 page_label_from_dest (EvView *view, EvLinkDest *dest)
1349 {
1350         EvLinkDestType type;
1351         gchar *msg = NULL;
1352
1353         type = ev_link_dest_get_dest_type (dest);
1354
1355         switch (type) {
1356                 case EV_LINK_DEST_TYPE_NAMED: {
1357                         EvLinkDest  *dest2;
1358                         const gchar *named_dest;
1359
1360                         named_dest = ev_link_dest_get_named_dest (dest);
1361                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1362                                                                   named_dest);
1363                         if (dest2) {
1364                                 msg = ev_page_cache_get_page_label (view->page_cache,
1365                                                                     ev_link_dest_get_page (dest2));
1366                                 g_object_unref (dest2);
1367                         }
1368                 }
1369
1370                         break;
1371                 default:
1372                         msg = ev_page_cache_get_page_label (view->page_cache,
1373                                                             ev_link_dest_get_page (dest));
1374         }
1375
1376         return msg;
1377 }
1378
1379 static char *
1380 tip_from_action_named (EvLinkAction *action)
1381 {
1382         const gchar *name = ev_link_action_get_name (action);
1383
1384         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1385                 return g_strdup (_("Go to first page"));
1386         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1387                 return g_strdup (_("Go to previous page"));
1388         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1389                 return g_strdup (_("Go to next page"));
1390         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1391                 return g_strdup (_("Go to last page"));
1392         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1393                 return g_strdup (_("Go to page"));
1394         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1395                 return g_strdup (_("Find"));
1396         }
1397
1398         return NULL;
1399 }
1400
1401 static char *
1402 tip_from_link (EvView *view, EvLink *link)
1403 {
1404         EvLinkAction *action;
1405         EvLinkActionType type;
1406         char *msg = NULL;
1407         char *page_label;
1408         const char *title;
1409
1410         action = ev_link_get_action (link);
1411         title = ev_link_get_title (link);
1412
1413         if (!action)
1414                 return title ? g_strdup (title) : NULL;
1415
1416         type = ev_link_action_get_action_type (action);
1417
1418         switch (type) {
1419                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1420                         page_label = page_label_from_dest (view,
1421                                                            ev_link_action_get_dest (action));
1422                         msg = g_strdup_printf (_("Go to page %s"), page_label);
1423                         g_free (page_label);
1424                         break;
1425                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1426                         if (title) {
1427                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1428                                                        ev_link_action_get_filename (action));
1429                         } else {
1430                                 msg = g_strdup_printf (_("Go to file “%s”"),
1431                                                        ev_link_action_get_filename (action));
1432                         }
1433
1434                         break;
1435                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1436                         msg = g_strdup (ev_link_action_get_uri (action));
1437                         break;
1438                 case EV_LINK_ACTION_TYPE_LAUNCH:
1439                         msg = g_strdup_printf (_("Launch %s"),
1440                                                ev_link_action_get_filename (action));
1441                         break;
1442                 case EV_LINK_ACTION_TYPE_NAMED:
1443                         msg = tip_from_action_named (action);
1444                         break;
1445                 default:
1446                         if (title)
1447                                 msg = g_strdup (title);
1448                         break;
1449         }
1450
1451         return msg;
1452 }
1453
1454 static void
1455 handle_link_over_xy (EvView *view, gint x, gint y)
1456 {
1457         EvLink *link;
1458
1459         link = ev_view_get_link_at_location (view, x, y);
1460
1461         if (view->link_tooltip == NULL) {
1462                 view->link_tooltip = ev_tooltip_new (GTK_WIDGET (view));
1463         }
1464
1465         if (view->hovered_link != link) {
1466                 view->hovered_link = link;
1467                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
1468         }
1469
1470         if (link) {
1471                 char *msg = tip_from_link (view, link);
1472
1473                 if (msg && g_utf8_validate (msg, -1, NULL)) {
1474                         EvTooltip *tooltip = EV_TOOLTIP (view->link_tooltip);
1475
1476                         ev_tooltip_set_position (tooltip, x, y);
1477                         ev_tooltip_set_text (tooltip, msg);
1478                         ev_tooltip_activate (tooltip);
1479                 }
1480                 g_free (msg);
1481
1482                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1483         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1484                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1485         } else {
1486                 ev_view_set_status (view, NULL);
1487                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1488                     view->cursor == EV_VIEW_CURSOR_IBEAM)
1489                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1490         }
1491         return;
1492 }
1493
1494 /*** GtkWidget implementation ***/
1495
1496 static void
1497 ev_view_size_request_continuous_dual_page (EvView         *view,
1498                                            GtkRequisition *requisition)
1499 {
1500         int max_width;
1501         gint n_pages;
1502         GtkBorder border;
1503
1504         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1505                                      view->scale, &max_width);
1506         compute_border (view, max_width, max_width, &border);
1507
1508         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
1509
1510         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
1511         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1512
1513         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1514                 requisition->width = 1;
1515         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1516                 requisition->width = 1;
1517                 /* FIXME: This could actually be set on one page docs or docs
1518                  * with a strange aspect ratio. */
1519                 /* requisition->height = 1;*/
1520         }
1521 }
1522
1523 static void
1524 ev_view_size_request_continuous (EvView         *view,
1525                                  GtkRequisition *requisition)
1526 {
1527         int max_width;
1528         int n_pages;
1529         GtkBorder border;
1530
1531
1532         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1533                                      view->scale, &max_width);
1534         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1535         compute_border (view, max_width, max_width, &border);
1536
1537         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
1538         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1539
1540         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1541                 requisition->width = 1;
1542         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1543                 requisition->width = 1;
1544                 /* FIXME: This could actually be set on one page docs or docs
1545                  * with a strange aspect ratio. */
1546                 /* requisition->height = 1;*/
1547         }
1548 }
1549
1550 static void
1551 ev_view_size_request_dual_page (EvView         *view,
1552                                 GtkRequisition *requisition)
1553 {
1554         GtkBorder border;
1555         gint width, height;
1556
1557         /* Find the largest of the two. */
1558         ev_page_cache_get_size (view->page_cache,
1559                                 view->current_page,
1560                                 view->rotation,
1561                                 view->scale,
1562                                 &width, &height);
1563         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1564                 gint width_2, height_2;
1565                 ev_page_cache_get_size (view->page_cache,
1566                                         view->current_page + 1,
1567                                         view->rotation,
1568                                         view->scale,
1569                                         &width_2, &height_2);
1570                 if (width_2 > width) {
1571                         width = width_2;
1572                         height = height_2;
1573                 }
1574         }
1575         compute_border (view, width, height, &border);
1576
1577         requisition->width = ((width + border.left + border.right) * 2) +
1578                 (view->spacing * 3);
1579         requisition->height = (height + border.top + border.bottom) +
1580                 (view->spacing * 2);
1581
1582         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1583                 requisition->width = 1;
1584         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1585                 requisition->width = 1;
1586                 requisition->height = 1;
1587         }
1588 }
1589
1590 static void
1591 ev_view_size_request_single_page (EvView         *view,
1592                                   GtkRequisition *requisition)
1593 {
1594         GtkBorder border;
1595         gint width, height;
1596
1597         ev_page_cache_get_size (view->page_cache,
1598                                 view->current_page,
1599                                 view->rotation,
1600                                 view->scale,
1601                                 &width, &height);
1602         compute_border (view, width, height, &border);
1603
1604         requisition->width = width + border.left + border.right + (2 * view->spacing);
1605         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1606
1607         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1608                 requisition->width = 1;
1609                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1610         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1611                 requisition->width = 1;
1612                 requisition->height = 1;
1613         }
1614 }
1615
1616 static void
1617 ev_view_size_request (GtkWidget      *widget,
1618                       GtkRequisition *requisition)
1619 {
1620         EvView *view = EV_VIEW (widget);
1621
1622         if (view->document == NULL) {
1623                 requisition->width = 1;
1624                 requisition->height = 1;
1625                 return;
1626         }
1627
1628         if (view->presentation) {
1629                 requisition->width = 1;
1630                 requisition->height = 1;
1631                 return;
1632         }
1633
1634         if (view->continuous && view->dual_page)
1635                 ev_view_size_request_continuous_dual_page (view, requisition);
1636         else if (view->continuous)
1637                 ev_view_size_request_continuous (view, requisition);
1638         else if (view->dual_page)
1639                 ev_view_size_request_dual_page (view, requisition);
1640         else
1641                 ev_view_size_request_single_page (view, requisition);
1642 }
1643
1644 static void
1645 ev_view_size_allocate (GtkWidget      *widget,
1646                        GtkAllocation  *allocation)
1647 {
1648         EvView *view = EV_VIEW (widget);
1649
1650         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1651             view->sizing_mode == EV_SIZING_BEST_FIT) {
1652
1653                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1654
1655                 ev_view_size_request (widget, &widget->requisition);
1656         }
1657
1658         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1659         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1660
1661         if (view->document)
1662                 view_update_range_and_current_page (view);
1663
1664         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1665         view->pending_resize = FALSE;
1666
1667         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1668 }
1669
1670 static void
1671 ev_view_realize (GtkWidget *widget)
1672 {
1673         EvView *view = EV_VIEW (widget);
1674         GdkWindowAttr attributes;
1675
1676         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1677
1678
1679         attributes.window_type = GDK_WINDOW_CHILD;
1680         attributes.wclass = GDK_INPUT_OUTPUT;
1681         attributes.visual = gtk_widget_get_visual (widget);
1682         attributes.colormap = gtk_widget_get_colormap (widget);
1683
1684         attributes.x = widget->allocation.x;
1685         attributes.y = widget->allocation.y;
1686         attributes.width = widget->allocation.width;
1687         attributes.height = widget->allocation.height;
1688         attributes.event_mask = GDK_EXPOSURE_MASK |
1689                                 GDK_BUTTON_PRESS_MASK |
1690                                 GDK_BUTTON_RELEASE_MASK |
1691                                 GDK_SCROLL_MASK |
1692                                 GDK_KEY_PRESS_MASK |
1693                                 GDK_POINTER_MOTION_MASK |
1694                                 GDK_POINTER_MOTION_HINT_MASK |
1695                                 GDK_ENTER_NOTIFY_MASK |
1696                                 GDK_LEAVE_NOTIFY_MASK;
1697
1698         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1699                                          &attributes,
1700                                          GDK_WA_X | GDK_WA_Y |
1701                                          GDK_WA_COLORMAP |
1702                                          GDK_WA_VISUAL);
1703         gdk_window_set_user_data (widget->window, widget);
1704         widget->style = gtk_style_attach (widget->style, widget->window);
1705
1706         if (view->presentation)
1707                 gdk_window_set_background (widget->window, &widget->style->black);
1708         else
1709                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1710 }
1711
1712 static gboolean
1713 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1714 {
1715         EvView *view = EV_VIEW (widget);
1716         guint state;
1717
1718         state = event->state & gtk_accelerator_get_default_mod_mask ();
1719
1720         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
1721                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1722
1723                 if (event->direction == GDK_SCROLL_UP ||
1724                     event->direction == GDK_SCROLL_LEFT) {
1725                         if (ev_view_can_zoom_in (view)) {
1726                                 ev_view_zoom_in (view);
1727                         }
1728                 } else {
1729                         if (ev_view_can_zoom_out (view)) {
1730                                 ev_view_zoom_out (view);
1731                         }
1732                 }
1733
1734                 return TRUE;
1735         }
1736
1737         view->jump_to_find_result = FALSE;
1738         /* Shift+Wheel scrolls the in the perpendicular direction */
1739         if (state & GDK_SHIFT_MASK) {
1740                 if (event->direction == GDK_SCROLL_UP)
1741                         event->direction = GDK_SCROLL_LEFT;
1742                 if (event->direction == GDK_SCROLL_LEFT)
1743                         event->direction = GDK_SCROLL_UP;
1744                 if (event->direction == GDK_SCROLL_DOWN)
1745                         event->direction = GDK_SCROLL_RIGHT;
1746                 if (event->direction == GDK_SCROLL_RIGHT)
1747                         event->direction = GDK_SCROLL_DOWN;
1748
1749                 event->state &= ~GDK_SHIFT_MASK;
1750                 state &= ~GDK_SHIFT_MASK;
1751         }
1752
1753         if (state == 0 && view->presentation) {
1754                 switch (event->direction) {
1755                         case GDK_SCROLL_DOWN:
1756                         case GDK_SCROLL_RIGHT:
1757                                 ev_view_next_page (view);
1758                                 break;
1759                         case GDK_SCROLL_UP:
1760                         case GDK_SCROLL_LEFT:
1761                                 ev_view_previous_page (view);
1762                                 break;
1763                 }
1764
1765                 return TRUE;
1766         }
1767
1768         return FALSE;
1769 }
1770
1771 static EvViewSelection *
1772 find_selection_for_page (EvView *view,
1773                          gint    page)
1774 {
1775         GList *list;
1776
1777         for (list = view->selection_info.selections; list != NULL; list = list->next) {
1778                 EvViewSelection *selection;
1779
1780                 selection = (EvViewSelection *) list->data;
1781
1782                 if (selection->page == page)
1783                         return selection;
1784         }
1785
1786         return NULL;
1787 }
1788
1789 static void
1790 draw_end_presentation_page (EvView       *view,
1791                             GdkRectangle *page_area)
1792 {
1793         PangoLayout *layout;
1794         PangoFontDescription *font_desc;
1795         gchar *markup;
1796         const gchar *text = _("End of presentation, press Escape to exit.");
1797
1798         if (view->presentation_state != EV_PRESENTATION_END)
1799                 return;
1800
1801         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
1802         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
1803         pango_layout_set_markup (layout, markup, -1);
1804         g_free (markup);
1805
1806         font_desc = pango_font_description_new ();
1807         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
1808         pango_layout_set_font_description (layout, font_desc);
1809
1810         gtk_paint_layout (GTK_WIDGET (view)->style,
1811                           GTK_WIDGET (view)->window,
1812                           GTK_WIDGET_STATE (view),
1813                           FALSE,
1814                           page_area,
1815                           GTK_WIDGET (view),
1816                           NULL,
1817                           page_area->x + 15,
1818                           page_area->y + 15,
1819                           layout);
1820
1821         pango_font_description_free (font_desc);
1822         g_object_unref (layout);
1823 }
1824
1825 static gboolean
1826 ev_view_expose_event (GtkWidget      *widget,
1827                       GdkEventExpose *event)
1828 {
1829         EvView *view = EV_VIEW (widget);
1830         int i;
1831
1832         if (view->presentation) {
1833                 switch (view->presentation_state) {
1834                         case EV_PRESENTATION_END: {
1835                                 GdkRectangle area = {0};
1836
1837                                 area.width = widget->allocation.width;
1838                                 area.height = widget->allocation.height;
1839
1840                                 draw_end_presentation_page (view, &area);
1841                         }
1842                                 return FALSE;
1843                         case EV_PRESENTATION_BLACK:
1844                         case EV_PRESENTATION_WHITE:
1845                                 return FALSE;
1846                         case EV_PRESENTATION_NORMAL:
1847                         default:
1848                                 break;
1849                 }
1850         }
1851
1852         if (view->loading) {
1853                 GdkRectangle area = {0};
1854
1855                 area.width = widget->allocation.width;
1856                 area.height = widget->allocation.height;
1857
1858                 draw_loading_text (view,
1859                                    &area,
1860                                    &(event->area));
1861         }
1862
1863         if (view->document == NULL)
1864                 return FALSE;
1865
1866         for (i = view->start_page; i <= view->end_page; i++) {
1867                 GdkRectangle page_area;
1868                 GtkBorder border;
1869                 gboolean page_ready = TRUE;
1870
1871                 if (!get_page_extents (view, i, &page_area, &border))
1872                         continue;
1873
1874                 page_area.x -= view->scroll_x;
1875                 page_area.y -= view->scroll_y;
1876
1877                 draw_one_page (view, i, &page_area, &border, &(event->area), &page_ready);
1878
1879                 if (page_ready && EV_IS_DOCUMENT_FIND (view->document))
1880                         highlight_find_results (view, i);
1881         }
1882
1883         return FALSE;
1884 }
1885
1886 static gboolean
1887 ev_view_popup_menu (GtkWidget *widget)
1888 {
1889     gint x, y;
1890     EvLink *link;
1891     EvView *view = EV_VIEW (widget);
1892
1893     gtk_widget_get_pointer (widget, &x, &y);
1894     link = ev_view_get_link_at_location (view, x, y);
1895     g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
1896     return TRUE;
1897 }
1898
1899 static gboolean
1900 ev_view_button_press_event (GtkWidget      *widget,
1901                             GdkEventButton *event)
1902 {
1903         EvView *view = EV_VIEW (widget);
1904         EvLink *link;
1905
1906         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1907                 gtk_widget_grab_focus (widget);
1908         }
1909
1910         view->pressed_button = event->button;
1911         view->selection_info.in_drag = FALSE;
1912
1913         switch (event->button) {
1914                 case 1:
1915                         if (view->selection_info.selections) {
1916                                 if (location_in_selected_text (view,
1917                                                                event->x + view->scroll_x,
1918                                                                event->y + view->scroll_y)) {
1919                                         view->selection_info.in_drag = TRUE;
1920                                 } else {
1921                                         clear_selection (view);
1922                                 }
1923
1924                                 gtk_widget_queue_draw (widget);
1925                         }
1926
1927                         view->selection_info.start.x = event->x + view->scroll_x;
1928                         view->selection_info.start.y = event->y + view->scroll_y;
1929
1930                         return TRUE;
1931                 case 2:
1932                         /* use root coordinates as reference point because
1933                          * scrolling changes window relative coordinates */
1934                         view->drag_info.start.x = event->x_root;
1935                         view->drag_info.start.y = event->y_root;
1936                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1937                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1938
1939                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1940
1941                         return TRUE;
1942                 case 3:
1943                         link = ev_view_get_link_at_location (view, event->x, event->y);
1944                         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
1945                         return TRUE;
1946         }
1947
1948         return FALSE;
1949 }
1950
1951 static void
1952 ev_view_drag_data_get (GtkWidget        *widget,
1953                        GdkDragContext   *context,
1954                        GtkSelectionData *selection_data,
1955                        guint             info,
1956                        guint             time)
1957 {
1958         EvView *view = EV_VIEW (widget);
1959
1960         if (view->selection_info.selections &&
1961             ev_document_can_get_text (view->document)) {
1962                 gchar *text;
1963
1964                 text = get_selected_text (view);
1965
1966                 gtk_selection_data_set_text (selection_data, text, strlen (text));
1967
1968                 g_free (text);
1969         }
1970 }
1971
1972 static gboolean
1973 selection_update_idle_cb (EvView *view)
1974 {
1975         compute_selections (view, &view->selection_info.start, &view->motion);
1976         view->selection_update_id = 0;
1977         return FALSE;
1978 }
1979
1980 static gboolean
1981 selection_scroll_timeout_cb (EvView *view)
1982 {
1983         gint x, y, shift = 0;
1984         GtkWidget *widget = GTK_WIDGET (view);
1985
1986         gtk_widget_get_pointer (widget, &x, &y);
1987
1988         if (y > widget->allocation.height) {
1989                 shift = (y - widget->allocation.height) / 2;
1990         } else if (y < 0) {
1991                 shift = y / 2;
1992         }
1993
1994         if (shift)
1995                 gtk_adjustment_set_value (view->vadjustment,
1996                                           CLAMP (view->vadjustment->value + shift,
1997                                           view->vadjustment->lower,
1998                                           view->vadjustment->upper -
1999                                           view->vadjustment->page_size));
2000
2001         if (x > widget->allocation.width) {
2002                 shift = (x - widget->allocation.width) / 2;
2003         } else if (x < 0) {
2004                 shift = x / 2;
2005         }
2006
2007         if (shift)
2008                 gtk_adjustment_set_value (view->hadjustment,
2009                                           CLAMP (view->hadjustment->value + shift,
2010                                           view->hadjustment->lower,
2011                                           view->hadjustment->upper -
2012                                           view->hadjustment->page_size));
2013
2014         return TRUE;
2015 }
2016
2017 static gboolean
2018 ev_view_motion_notify_event (GtkWidget      *widget,
2019                              GdkEventMotion *event)
2020 {
2021         EvView *view = EV_VIEW (widget);
2022         gint x, y;
2023
2024         if (!view->document)
2025                 return FALSE;
2026
2027         if (event->is_hint || event->window != widget->window) {
2028             gtk_widget_get_pointer (widget, &x, &y);
2029         } else {
2030             x = event->x;
2031             y = event->y;
2032         }
2033
2034         if (view->selection_info.in_drag) {
2035                 if (gtk_drag_check_threshold (widget,
2036                                               view->selection_info.start.x,
2037                                               view->selection_info.start.y,
2038                                               x, y)) {
2039                         GdkDragContext *context;
2040                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
2041
2042                         gtk_target_list_add_text_targets (target_list, 0);
2043
2044                         context = gtk_drag_begin (widget, target_list,
2045                                                   GDK_ACTION_COPY,
2046                                                   1, (GdkEvent *)event);
2047
2048                         view->selection_info.in_drag = FALSE;
2049
2050                         gtk_target_list_unref (target_list);
2051
2052                         return TRUE;
2053                 }
2054         }
2055
2056         /* For the Evince 0.4.x release, we limit selection to un-rotated
2057          * documents only.
2058          */
2059         if (view->pressed_button == 1 && view->rotation == 0) {
2060
2061                 /* Schedule timeout to scroll during selection and additionally
2062                  * scroll once to allow arbitrary speed. */
2063                 if (!view->selection_scroll_id)
2064                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME, (GSourceFunc)selection_scroll_timeout_cb, view);
2065                 else
2066                     selection_scroll_timeout_cb (view);
2067
2068                 view->selection_info.in_selection = TRUE;
2069                 view->motion.x = x + view->scroll_x;
2070                 view->motion.y = y + view->scroll_y;
2071
2072                 /* Queue an idle to handle the motion.  We do this because
2073                  * handling any selection events in the motion could be slower
2074                  * than new motion events reach us.  We always put it in the
2075                  * idle to make sure we catch up and don't visibly lag the
2076                  * mouse. */
2077                 if (!view->selection_update_id)
2078                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
2079
2080                 return TRUE;
2081         } else if (view->pressed_button == 2) {
2082                 if (!view->drag_info.in_drag) {
2083                         gboolean start;
2084
2085                         start = gtk_drag_check_threshold (widget,
2086                                                           view->drag_info.start.x,
2087                                                           view->drag_info.start.y,
2088                                                           event->x_root,
2089                                                           event->y_root);
2090                         view->drag_info.in_drag = start;
2091                 }
2092
2093                 if (view->drag_info.in_drag) {
2094                         int dx, dy;
2095                         gdouble dhadj_value, dvadj_value;
2096
2097                         dx = event->x_root - view->drag_info.start.x;
2098                         dy = event->y_root - view->drag_info.start.y;
2099
2100                         dhadj_value = view->hadjustment->page_size *
2101                                       (gdouble)dx / widget->allocation.width;
2102                         dvadj_value = view->vadjustment->page_size *
2103                                       (gdouble)dy / widget->allocation.height;
2104
2105                         /* clamp scrolling to visible area */
2106                         gtk_adjustment_set_value (view->hadjustment,
2107                                                   MIN(view->drag_info.hadj - dhadj_value,
2108                                                       view->hadjustment->upper -
2109                                                       view->hadjustment->page_size));
2110                         gtk_adjustment_set_value (view->vadjustment,
2111                                                   MIN(view->drag_info.vadj - dvadj_value,
2112                                                       view->vadjustment->upper -
2113                                                       view->vadjustment->page_size));
2114
2115                         return TRUE;
2116                 }
2117         } else if (view->pressed_button <= 0) {
2118                 handle_link_over_xy (view, x, y);
2119                 return TRUE;
2120         }
2121
2122         return FALSE;
2123 }
2124
2125 static gboolean
2126 ev_view_button_release_event (GtkWidget      *widget,
2127                               GdkEventButton *event)
2128 {
2129         EvView *view = EV_VIEW (widget);
2130         EvLink *link;
2131
2132         if (view->pressed_button == 2) {
2133                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
2134         }
2135
2136         if (view->document && view->pressed_button == 1) {
2137                 link = ev_view_get_link_at_location (view, event->x, event->y);
2138         } else {
2139                 link = NULL;
2140         }
2141
2142         view->pressed_button = -1;
2143         view->drag_info.in_drag = FALSE;
2144
2145         if (view->selection_scroll_id) {
2146             g_source_remove (view->selection_scroll_id);
2147             view->selection_scroll_id = 0;
2148         }
2149         if (view->selection_update_id) {
2150             g_source_remove (view->selection_update_id);
2151             view->selection_update_id = 0;
2152         }
2153
2154         if (view->selection_info.selections) {
2155                 ev_view_update_primary_selection (view);
2156
2157                 if (view->selection_info.in_drag) {
2158                         clear_selection (view);
2159                         gtk_widget_queue_draw (widget);
2160                 }
2161
2162                 view->selection_info.in_drag = FALSE;
2163         } else if (link) {
2164                 ev_view_handle_link (view, link);
2165         } else if (view->presentation) {
2166                 switch (event->button) {
2167                         case 1:
2168                                 ev_view_next_page (view);
2169                                 return TRUE;
2170                         case 3:
2171                                 ev_view_previous_page (view);
2172                                 return TRUE;
2173                 }
2174         }
2175
2176         return FALSE;
2177 }
2178
2179 static gboolean
2180 ev_view_key_press_event (GtkWidget   *widget,
2181                          GdkEventKey *event)
2182 {
2183         EvView *view = EV_VIEW (widget);
2184         EvPresentationState current;
2185
2186         if (!view->presentation ||
2187             view->presentation_state == EV_PRESENTATION_END)
2188                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
2189
2190
2191         current = view->presentation_state;
2192
2193         switch (event->keyval) {
2194                 case GDK_b:
2195                 case GDK_B:
2196                         view->presentation_state =
2197                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
2198                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
2199                         break;
2200                 case GDK_w:
2201                 case GDK_W:
2202                         view->presentation_state =
2203                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
2204                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
2205                         break;
2206                 default:
2207                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
2208                             view->presentation_state == EV_PRESENTATION_WHITE) {
2209                                 view->presentation_state = EV_PRESENTATION_NORMAL;
2210                         }
2211         }
2212
2213         if (current == view->presentation_state)
2214                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
2215
2216         switch (view->presentation_state) {
2217                 case EV_PRESENTATION_NORMAL:
2218                 case EV_PRESENTATION_BLACK:
2219                         gdk_window_set_background (widget->window,
2220                                                    &widget->style->black);
2221                         break;
2222                 case EV_PRESENTATION_WHITE:
2223                         gdk_window_set_background (widget->window,
2224                                                    &widget->style->white);
2225                         break;
2226                 default:
2227                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
2228         }
2229
2230         gtk_widget_queue_draw (widget);
2231         return TRUE;
2232 }
2233
2234 static gint
2235 ev_view_focus_in (GtkWidget     *widget,
2236                   GdkEventFocus *event)
2237 {
2238         if (EV_VIEW (widget)->pixbuf_cache)
2239                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
2240         gtk_widget_queue_draw (widget);
2241
2242         return FALSE;
2243 }
2244
2245 static gint
2246 ev_view_focus_out (GtkWidget     *widget,
2247                      GdkEventFocus *event)
2248 {
2249         if (EV_VIEW (widget)->pixbuf_cache)
2250                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
2251         gtk_widget_queue_draw (widget);
2252
2253         return FALSE;
2254 }
2255
2256 static gboolean
2257 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
2258 {
2259         EvView *view = EV_VIEW (widget);
2260
2261         ev_view_set_status (view, NULL);
2262
2263         if (view->cursor == EV_VIEW_CURSOR_LINK ||
2264             view->cursor == EV_VIEW_CURSOR_IBEAM)
2265                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
2266
2267         if (view->link_tooltip) {
2268                 view->hovered_link = NULL;
2269                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
2270         }
2271
2272         return FALSE;
2273 }
2274
2275 static gboolean
2276 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
2277 {
2278         EvView *view = EV_VIEW (widget);
2279
2280         handle_link_over_xy (view, event->x, event->y);
2281
2282         return FALSE;
2283 }
2284
2285 static void
2286 ev_view_style_set (GtkWidget *widget,
2287                    GtkStyle  *old_style)
2288 {
2289         if (EV_VIEW (widget)->pixbuf_cache)
2290                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
2291
2292         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
2293 }
2294
2295 /*** Drawing ***/
2296
2297 static guint32
2298 ev_gdk_color_to_rgb (const GdkColor *color)
2299 {
2300   guint32 result;
2301   result = (0xff0000 | (color->red & 0xff00));
2302   result <<= 8;
2303   result |= ((color->green & 0xff00) | (color->blue >> 8));
2304   return result;
2305 }
2306
2307 static void
2308 draw_rubberband (GtkWidget *widget, GdkWindow *window,
2309                  const GdkRectangle *rect, guchar alpha)
2310 {
2311         GdkGC *gc;
2312         GdkPixbuf *pixbuf;
2313         GdkColor *fill_color_gdk;
2314         guint fill_color;
2315
2316         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
2317         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
2318
2319         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
2320                                  rect->width, rect->height);
2321         gdk_pixbuf_fill (pixbuf, fill_color);
2322
2323         gdk_draw_pixbuf (window, NULL, pixbuf,
2324                          0, 0,
2325                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
2326                          rect->width, rect->height,
2327                          GDK_RGB_DITHER_NONE,
2328                          0, 0);
2329
2330         g_object_unref (pixbuf);
2331
2332         gc = gdk_gc_new (window);
2333         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
2334         gdk_draw_rectangle (window, gc, FALSE,
2335                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
2336                             rect->width - 1,
2337                             rect->height - 1);
2338         g_object_unref (gc);
2339
2340         gdk_color_free (fill_color_gdk);
2341 }
2342
2343
2344 static void
2345 highlight_find_results (EvView *view, int page)
2346 {
2347         EvDocumentFind *find;
2348         int i, results = 0;
2349
2350         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
2351
2352         find = EV_DOCUMENT_FIND (view->document);
2353
2354         results = ev_document_find_get_n_results (find, page);
2355
2356         for (i = 0; i < results; i++) {
2357                 EvRectangle rectangle;
2358                 GdkRectangle view_rectangle;
2359                 guchar alpha;
2360
2361                 if (i == view->find_result && page == view->current_page) {
2362                         alpha = 0x90;
2363                 } else {
2364                         alpha = 0x20;
2365                 }
2366
2367                 ev_document_find_get_result (find, page, i, &rectangle);
2368                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
2369                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
2370                                  &view_rectangle, alpha);
2371         }
2372 }
2373
2374 static void
2375 draw_loading_text (EvView       *view,
2376                    GdkRectangle *page_area,
2377                    GdkRectangle *expose_area)
2378 {
2379         PangoLayout *layout;
2380         PangoFontDescription *font_desc;
2381         PangoRectangle logical_rect;
2382         double real_scale;
2383         int target_width;
2384
2385         /* Don't annoy users with loading messages during presentations.
2386          * FIXME: Temporary "workaround" for
2387          * http://bugzilla.gnome.org/show_bug.cgi?id=320352 */
2388         if (view->presentation)
2389                 return;
2390
2391         const char *loading_text = _("Loading...");
2392
2393         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
2394
2395         font_desc = pango_font_description_new ();
2396
2397
2398         /* We set the font to be 10 points, get the size, and scale appropriately */
2399         pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
2400         pango_layout_set_font_description (layout, font_desc);
2401         pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
2402
2403         /* Make sure we fit the middle of the page */
2404         target_width = MAX (page_area->width / 2, 1);
2405         real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
2406         pango_font_description_set_size (font_desc, (int)real_scale);
2407         pango_layout_set_font_description (layout, font_desc);
2408         pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
2409
2410         gtk_paint_layout (GTK_WIDGET (view)->style,
2411                           GTK_WIDGET (view)->window,
2412                           GTK_WIDGET_STATE (view),
2413                           FALSE,
2414                           page_area,
2415                           GTK_WIDGET (view),
2416                           NULL,
2417                           page_area->x + (target_width/2),
2418                           page_area->y + (page_area->height - logical_rect.height) / 2,
2419                           layout);
2420
2421         pango_font_description_free (font_desc);
2422         g_object_unref (layout);
2423 }
2424
2425 static void
2426 draw_one_page (EvView          *view,
2427                gint             page,
2428                GdkRectangle    *page_area,
2429                GtkBorder       *border,
2430                GdkRectangle    *expose_area,
2431                gboolean        *page_ready)
2432 {
2433         gint width, height;
2434         GdkPixbuf *current_pixbuf;
2435         GdkRectangle overlap;
2436         GdkRectangle real_page_area;
2437         EvViewSelection *selection;
2438         gint current_page;
2439
2440         g_assert (view->document);
2441
2442         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
2443                 return;
2444
2445         current_page = ev_page_cache_get_current_page (view->page_cache);
2446         selection = find_selection_for_page (view, page);
2447         ev_page_cache_get_size (view->page_cache,
2448                                 page, view->rotation,
2449                                 view->scale,
2450                                 &width, &height);
2451         /* Render the document itself */
2452         real_page_area = *page_area;
2453
2454         real_page_area.x += border->left;
2455         real_page_area.y += border->top;
2456         real_page_area.width -= (border->left + border->right);
2457         real_page_area.height -= (border->top + border->bottom);
2458         *page_ready = TRUE;
2459
2460         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
2461                                          GTK_WIDGET (view),
2462                                          page_area, border,
2463                                          page == current_page);
2464
2465         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
2466                 GdkPixbuf *selection_pixbuf = NULL;
2467                 GdkPixbuf *scaled_image;
2468                 GdkPixbuf *scaled_selection;
2469
2470                 current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
2471
2472                 /* Get the selection pixbuf iff we have something to draw */
2473                 if (current_pixbuf && view->selection_mode == EV_VIEW_SELECTION_TEXT && selection)
2474                         selection_pixbuf = ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
2475                                                                                  page,
2476                                                                                  view->scale,
2477                                                                                  NULL);
2478
2479                 if (current_pixbuf == NULL)
2480                         scaled_image = NULL;
2481                 else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
2482                          height == gdk_pixbuf_get_height (current_pixbuf))
2483                         scaled_image = g_object_ref (current_pixbuf);
2484                 else
2485                         /* FIXME: We don't want to scale the whole area, just the right
2486                          * area of it */
2487                         scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
2488                                                                 width, height,
2489                                                                 GDK_INTERP_NEAREST);
2490
2491                 if (selection_pixbuf == NULL)
2492                         scaled_selection = NULL;
2493                 else if (width == gdk_pixbuf_get_width (selection_pixbuf) &&
2494                          height == gdk_pixbuf_get_height (selection_pixbuf))
2495                         scaled_selection = g_object_ref (selection_pixbuf);
2496                 else
2497                         /* FIXME: We don't want to scale the whole area, just the right
2498                          * area of it */
2499                         scaled_selection = gdk_pixbuf_scale_simple (selection_pixbuf,
2500                                                                     width, height,
2501                                                                     GDK_INTERP_NEAREST);
2502
2503                 if (scaled_image) {
2504                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
2505                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
2506                                          scaled_image,
2507                                          overlap.x - real_page_area.x,
2508                                          overlap.y - real_page_area.y,
2509                                          overlap.x, overlap.y,
2510                                          overlap.width, overlap.height,
2511                                          GDK_RGB_DITHER_NORMAL,
2512                                          0, 0);
2513                         g_object_unref (scaled_image);
2514                 } else {
2515                         draw_loading_text (view,
2516                                            &real_page_area,
2517                                            expose_area);
2518                         *page_ready = FALSE;
2519                 }
2520
2521                 if (scaled_selection) {
2522                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
2523                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
2524                                          scaled_selection,
2525                                          overlap.x - real_page_area.x,
2526                                          overlap.y - real_page_area.y,
2527                                          overlap.x, overlap.y,
2528                                          overlap.width, overlap.height,
2529                                          GDK_RGB_DITHER_NORMAL,
2530                                          0, 0);
2531                         g_object_unref (scaled_selection);
2532                 }
2533         }
2534 }
2535
2536 /*** GObject functions ***/
2537
2538 static void
2539 ev_view_finalize (GObject *object)
2540 {
2541         EvView *view = EV_VIEW (object);
2542
2543         LOG ("Finalize");
2544
2545         g_free (view->status);
2546         g_free (view->find_status);
2547
2548         clear_selection (view);
2549
2550         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
2551 }
2552
2553 static void
2554 ev_view_destroy (GtkObject *object)
2555 {
2556         EvView *view = EV_VIEW (object);
2557
2558         if (view->document) {
2559                 g_object_unref (view->document);
2560                 view->document = NULL;
2561         }
2562
2563         if (view->pixbuf_cache) {
2564                 g_object_unref (view->pixbuf_cache);
2565                 view->pixbuf_cache = NULL;
2566         }
2567
2568         if (view->link_tooltip) {
2569                 gtk_widget_destroy (view->link_tooltip);
2570                 view->link_tooltip = NULL;
2571         }
2572
2573         if (view->selection_scroll_id) {
2574             g_source_remove (view->selection_scroll_id);
2575             view->selection_scroll_id = 0;
2576         }
2577
2578         if (view->selection_update_id) {
2579             g_source_remove (view->selection_update_id);
2580             view->selection_update_id = 0;
2581         }
2582
2583         ev_view_set_scroll_adjustments (view, NULL, NULL);
2584
2585         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
2586 }
2587
2588 static void
2589 ev_view_set_property (GObject      *object,
2590                       guint         prop_id,
2591                       const GValue *value,
2592                       GParamSpec   *pspec)
2593 {
2594         EvView *view = EV_VIEW (object);
2595
2596         switch (prop_id) {
2597                 case PROP_CONTINUOUS:
2598                         ev_view_set_continuous (view, g_value_get_boolean (value));
2599                         break;
2600                 case PROP_DUAL_PAGE:
2601                         ev_view_set_dual_page (view, g_value_get_boolean (value));
2602                         break;
2603                 case PROP_FULLSCREEN:
2604                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
2605                         break;
2606                 case PROP_PRESENTATION:
2607                         ev_view_set_presentation (view, g_value_get_boolean (value));
2608                         break;
2609                 case PROP_SIZING_MODE:
2610                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
2611                         break;
2612                 case PROP_ZOOM:
2613                         ev_view_set_zoom (view, g_value_get_double (value), FALSE);
2614                         break;
2615                 case PROP_ROTATION:
2616                         ev_view_set_rotation (view, g_value_get_int (value));
2617                         break;
2618                 default:
2619                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2620         }
2621 }
2622
2623 static AtkObject *
2624 ev_view_get_accessible (GtkWidget *widget)
2625 {
2626         static gboolean first_time = TRUE;
2627
2628         if (first_time) {
2629                 AtkObjectFactory *factory;
2630                 AtkRegistry *registry;
2631                 GType derived_type;
2632                 GType derived_atk_type;
2633
2634                 /*
2635                  * Figure out whether accessibility is enabled by looking at the
2636                  * type of the accessible object which would be created for
2637                  * the parent type of EvView.
2638                  */
2639                 derived_type = g_type_parent (EV_TYPE_VIEW);
2640
2641                 registry = atk_get_default_registry ();
2642                 factory = atk_registry_get_factory (registry,
2643                                                     derived_type);
2644                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
2645                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
2646                         atk_registry_set_factory_type (registry,
2647                                                        EV_TYPE_VIEW,
2648                                                        ev_view_accessible_factory_get_type ());
2649                 first_time = FALSE;
2650         }
2651         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
2652 }
2653
2654 static void
2655 ev_view_get_property (GObject *object,
2656                       guint prop_id,
2657                       GValue *value,
2658                       GParamSpec *pspec)
2659 {
2660         EvView *view = EV_VIEW (object);
2661
2662         switch (prop_id) {
2663                 case PROP_STATUS:
2664                         g_value_set_string (value, view->status);
2665                         break;
2666                 case PROP_FIND_STATUS:
2667                         g_value_set_string (value, view->status);
2668                         break;
2669                 case PROP_CONTINUOUS:
2670                         g_value_set_boolean (value, view->continuous);
2671                         break;
2672                 case PROP_DUAL_PAGE:
2673                         g_value_set_boolean (value, view->dual_page);
2674                         break;
2675                 case PROP_FULLSCREEN:
2676                         g_value_set_boolean (value, view->fullscreen);
2677                         break;
2678                 case PROP_PRESENTATION:
2679                         g_value_set_boolean (value, view->presentation);
2680                         break;
2681                 case PROP_SIZING_MODE:
2682                         g_value_set_enum (value, view->sizing_mode);
2683                         break;
2684                 case PROP_ZOOM:
2685                         g_value_set_double (value, view->scale);
2686                         break;
2687                 case PROP_ROTATION:
2688                         g_value_set_int (value, view->rotation);
2689                         break;
2690                 case PROP_HAS_SELECTION:
2691                         g_value_set_boolean (value,
2692                                              view->selection_info.selections != NULL);
2693                         break;
2694                 default:
2695                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2696         }
2697 }
2698
2699 static void
2700 ev_view_class_init (EvViewClass *class)
2701 {
2702         GObjectClass *object_class = G_OBJECT_CLASS (class);
2703         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
2704         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
2705         GtkBindingSet *binding_set;
2706
2707         object_class->finalize = ev_view_finalize;
2708         object_class->set_property = ev_view_set_property;
2709         object_class->get_property = ev_view_get_property;
2710
2711         widget_class->expose_event = ev_view_expose_event;
2712         widget_class->button_press_event = ev_view_button_press_event;
2713         widget_class->motion_notify_event = ev_view_motion_notify_event;
2714         widget_class->button_release_event = ev_view_button_release_event;
2715         widget_class->key_press_event = ev_view_key_press_event;
2716         widget_class->focus_in_event = ev_view_focus_in;
2717         widget_class->focus_out_event = ev_view_focus_out;
2718         widget_class->get_accessible = ev_view_get_accessible;
2719         widget_class->size_request = ev_view_size_request;
2720         widget_class->size_allocate = ev_view_size_allocate;
2721         widget_class->realize = ev_view_realize;
2722         widget_class->scroll_event = ev_view_scroll_event;
2723         widget_class->enter_notify_event = ev_view_enter_notify_event;
2724         widget_class->leave_notify_event = ev_view_leave_notify_event;
2725         widget_class->style_set = ev_view_style_set;
2726         widget_class->drag_data_get = ev_view_drag_data_get;
2727         widget_class->popup_menu = ev_view_popup_menu;
2728         gtk_object_class->destroy = ev_view_destroy;
2729
2730         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
2731         class->binding_activated = ev_view_scroll;
2732
2733         widget_class->set_scroll_adjustments_signal =
2734             g_signal_new ("set-scroll-adjustments",
2735                           G_OBJECT_CLASS_TYPE (object_class),
2736                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2737                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
2738                           NULL, NULL,
2739                           ev_marshal_VOID__OBJECT_OBJECT,
2740                           G_TYPE_NONE, 2,
2741                           GTK_TYPE_ADJUSTMENT,
2742                           GTK_TYPE_ADJUSTMENT);
2743
2744         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
2745                          G_TYPE_FROM_CLASS (object_class),
2746                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2747                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
2748                          NULL, NULL,
2749                          ev_marshal_VOID__ENUM_BOOLEAN,
2750                          G_TYPE_NONE, 2,
2751                          GTK_TYPE_SCROLL_TYPE,
2752                          G_TYPE_BOOLEAN);
2753
2754         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
2755                          G_TYPE_FROM_CLASS (object_class),
2756                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2757                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
2758                          NULL, NULL,
2759                          ev_marshal_VOID__VOID,
2760                          G_TYPE_NONE, 0, G_TYPE_NONE);
2761         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
2762                          G_TYPE_FROM_CLASS (object_class),
2763                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2764                          G_STRUCT_OFFSET (EvViewClass, external_link),
2765                          NULL, NULL,
2766                          g_cclosure_marshal_VOID__OBJECT,
2767                          G_TYPE_NONE, 1,
2768                          G_TYPE_OBJECT);
2769         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
2770                          G_TYPE_FROM_CLASS (object_class),
2771                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2772                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
2773                          NULL, NULL,
2774                          g_cclosure_marshal_VOID__OBJECT,
2775                          G_TYPE_NONE, 1,
2776                          G_TYPE_OBJECT);
2777
2778         g_object_class_install_property (object_class,
2779                                          PROP_STATUS,
2780                                          g_param_spec_string ("status",
2781                                                               "Status Message",
2782                                                               "The status message",
2783                                                               NULL,
2784                                                               G_PARAM_READABLE));
2785
2786         g_object_class_install_property (object_class,
2787                                          PROP_FIND_STATUS,
2788                                          g_param_spec_string ("find-status",
2789                                                               "Find Status Message",
2790                                                               "The find status message",
2791                                                               NULL,
2792                                                               G_PARAM_READABLE));
2793
2794         g_object_class_install_property (object_class,
2795                                          PROP_CONTINUOUS,
2796                                          g_param_spec_boolean ("continuous",
2797                                                                "Continuous",
2798                                                                "Continuous scrolling mode",
2799                                                                TRUE,
2800                                                                G_PARAM_READWRITE));
2801
2802         g_object_class_install_property (object_class,
2803                                          PROP_DUAL_PAGE,
2804                                          g_param_spec_boolean ("dual-page",
2805                                                                "Dual Page",
2806                                                                "Two pages visible at once",
2807                                                                FALSE,
2808                                                                G_PARAM_READWRITE));
2809         g_object_class_install_property (object_class,
2810                                          PROP_FULLSCREEN,
2811                                          g_param_spec_boolean ("fullscreen",
2812                                                                "Full Screen",
2813                                                                "Draw page in a fullscreen fashion",
2814                                                                FALSE,
2815                                                                G_PARAM_READWRITE));
2816         g_object_class_install_property (object_class,
2817                                          PROP_PRESENTATION,
2818                                          g_param_spec_boolean ("presentation",
2819                                                                "Presentation",
2820                                                                "Draw page in presentation mode",
2821                                                                TRUE,
2822                                                                G_PARAM_READWRITE));
2823
2824         g_object_class_install_property (object_class,
2825                                          PROP_SIZING_MODE,
2826                                          g_param_spec_enum ("sizing-mode",
2827                                                             "Sizing Mode",
2828                                                             "Sizing Mode",
2829                                                             EV_TYPE_SIZING_MODE,
2830                                                             EV_SIZING_FIT_WIDTH,
2831                                                             G_PARAM_READWRITE));
2832
2833         g_object_class_install_property (object_class,
2834                                          PROP_ZOOM,
2835                                          g_param_spec_double ("zoom",
2836                                                               "Zoom factor",
2837                                                                "Zoom factor",
2838                                                                MIN_SCALE,
2839                                                                MAX_SCALE,
2840                                                                1.0,
2841                                                                G_PARAM_READWRITE));
2842         g_object_class_install_property (object_class,
2843                                          PROP_ROTATION,
2844                                          g_param_spec_double ("rotation",
2845                                                               "Rotation",
2846                                                                "Rotation",
2847                                                                0,
2848                                                                360,
2849                                                                0,
2850                                                                G_PARAM_READWRITE));
2851         g_object_class_install_property (object_class,
2852                                          PROP_HAS_SELECTION,
2853                                          g_param_spec_boolean ("has-selection",
2854                                                                "Has selection",
2855                                                                "The view has selections",
2856                                                                FALSE,
2857                                                                G_PARAM_READABLE));
2858
2859         binding_set = gtk_binding_set_by_class (class);
2860
2861         add_scroll_binding_keypad (binding_set, GDK_Left,  0, EV_SCROLL_STEP_BACKWARD, TRUE);
2862         add_scroll_binding_keypad (binding_set, GDK_Right, 0, EV_SCROLL_STEP_FORWARD,  TRUE);
2863         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, EV_SCROLL_STEP_DOWN, TRUE);
2864         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, EV_SCROLL_STEP_UP,  TRUE);
2865         add_scroll_binding_keypad (binding_set, GDK_Up,    0, EV_SCROLL_STEP_BACKWARD, FALSE);
2866         add_scroll_binding_keypad (binding_set, GDK_Down,  0, EV_SCROLL_STEP_FORWARD,  FALSE);
2867         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, EV_SCROLL_STEP_DOWN, FALSE);
2868         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, EV_SCROLL_STEP_UP,  FALSE);
2869 }
2870
2871 static void
2872 ev_view_init (EvView *view)
2873 {
2874         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
2875
2876         view->spacing = 5;
2877         view->scale = 1.0;
2878         view->current_page = 0;
2879         view->pressed_button = -1;
2880         view->cursor = EV_VIEW_CURSOR_NORMAL;
2881         view->drag_info.in_drag = FALSE;
2882         view->selection_info.selections = NULL;
2883         view->selection_info.in_selection = FALSE;
2884         view->selection_info.in_drag = FALSE;
2885         view->selection_mode = EV_VIEW_SELECTION_TEXT;
2886         view->continuous = TRUE;
2887         view->dual_page = FALSE;
2888         view->presentation = FALSE;
2889         view->presentation_state = EV_PRESENTATION_NORMAL;
2890         view->fullscreen = FALSE;
2891         view->sizing_mode = EV_SIZING_FIT_WIDTH;
2892         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2893         view->jump_to_find_result = TRUE;
2894 }
2895
2896 /*** Callbacks ***/
2897
2898 static void
2899 find_changed_cb (EvDocument *document, int page, EvView *view)
2900 {
2901         double percent;
2902         int n_pages;
2903
2904         percent = ev_document_find_get_progress
2905                         (EV_DOCUMENT_FIND (view->document));
2906         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2907
2908         if (view->jump_to_find_result == TRUE) {
2909                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
2910                 jump_to_find_result (view);
2911         }
2912         update_find_status_message (view, percent * n_pages >= n_pages - 1 );
2913         if (view->current_page == page)
2914                 gtk_widget_queue_draw (GTK_WIDGET (view));
2915 }
2916
2917 static void
2918 job_finished_cb (EvPixbufCache *pixbuf_cache,
2919                  EvView        *view)
2920 {
2921         gtk_widget_queue_draw (GTK_WIDGET (view));
2922 }
2923
2924 static void
2925 page_changed_cb (EvPageCache *page_cache,
2926                  int          new_page,
2927                  EvView      *view)
2928 {
2929         if (view->current_page != new_page) {
2930                 view->current_page = new_page;
2931                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
2932                 gtk_widget_queue_resize (GTK_WIDGET (view));
2933         } else {
2934                 gtk_widget_queue_draw (GTK_WIDGET (view));
2935         }
2936
2937         if (EV_IS_DOCUMENT_FIND (view->document)) {
2938                 view->find_result = 0;
2939                 update_find_status_message (view, TRUE);
2940         }
2941 }
2942
2943 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
2944                                          EvView *view)
2945 {
2946         int dx = 0, dy = 0;
2947
2948         if (! GTK_WIDGET_REALIZED (view))
2949                 return;
2950
2951         if (view->hadjustment) {
2952                 dx = view->scroll_x - (int) view->hadjustment->value;
2953                 view->scroll_x = (int) view->hadjustment->value;
2954         } else {
2955                 view->scroll_x = 0;
2956         }
2957
2958         if (view->vadjustment) {
2959                 dy = view->scroll_y - (int) view->vadjustment->value;
2960                 view->scroll_y = (int) view->vadjustment->value;
2961         } else {
2962                 view->scroll_y = 0;
2963         }
2964
2965
2966         if (view->pending_resize)
2967                 gtk_widget_queue_draw (GTK_WIDGET (view));
2968         else
2969                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
2970
2971
2972         if (view->document)
2973                 view_update_range_and_current_page (view);
2974 }
2975
2976 GtkWidget*
2977 ev_view_new (void)
2978 {
2979         GtkWidget *view;
2980
2981         view = g_object_new (EV_TYPE_VIEW, NULL);
2982
2983         return view;
2984 }
2985
2986 static void
2987 setup_caches (EvView *view)
2988 {
2989         view->page_cache = ev_page_cache_get (view->document);
2990         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
2991         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
2992         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
2993 }
2994
2995 static void
2996 clear_caches (EvView *view)
2997 {
2998         if (view->pixbuf_cache) {
2999                 g_object_unref (view->pixbuf_cache);
3000                 view->pixbuf_cache = NULL;
3001         }
3002
3003         if (view->page_cache) {
3004                 view->page_cache = NULL;
3005         }
3006 }
3007
3008 void
3009 ev_view_set_loading (EvView       *view,
3010                      gboolean      loading)
3011 {
3012         view->loading = loading;
3013         gtk_widget_queue_draw (GTK_WIDGET (view));
3014 }
3015
3016 void
3017 ev_view_set_document (EvView     *view,
3018                       EvDocument *document)
3019 {
3020         g_return_if_fail (EV_IS_VIEW (view));
3021
3022         view->loading = FALSE;
3023
3024         if (document != view->document) {
3025                 clear_caches (view);
3026
3027                 if (view->document) {
3028                         g_signal_handlers_disconnect_by_func (view->document,
3029                                                               find_changed_cb,
3030                                                               view);
3031                         g_object_unref (view->document);
3032                         view->page_cache = NULL;
3033
3034                 }
3035
3036                 view->document = document;
3037                 view->find_result = 0;
3038
3039                 if (view->document) {
3040                         g_object_ref (view->document);
3041                         if (EV_IS_DOCUMENT_FIND (view->document)) {
3042                                 g_signal_connect (view->document,
3043                                                   "find_changed",
3044                                                   G_CALLBACK (find_changed_cb),
3045                                                   view);
3046                         }
3047
3048                         setup_caches (view);
3049                 }
3050
3051                 gtk_widget_queue_resize (GTK_WIDGET (view));
3052         }
3053 }
3054
3055 /*** Zoom and sizing mode ***/
3056
3057 #define EPSILON 0.0000001
3058 void
3059 ev_view_set_zoom (EvView   *view,
3060                   double    factor,
3061                   gboolean  relative)
3062 {
3063         double scale;
3064
3065         if (relative)
3066                 scale = view->scale * factor;
3067         else
3068                 scale = factor;
3069
3070         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
3071
3072         if (ABS (view->scale - scale) < EPSILON)
3073                 return;
3074
3075         view->scale = scale;
3076         view->pending_resize = TRUE;
3077
3078         gtk_widget_queue_resize (GTK_WIDGET (view));
3079
3080         g_object_notify (G_OBJECT (view), "zoom");
3081 }
3082
3083 double
3084 ev_view_get_zoom (EvView *view)
3085 {
3086         return view->scale;
3087 }
3088
3089 gboolean
3090 ev_view_get_continuous (EvView *view)
3091 {
3092         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3093
3094         return view->continuous;
3095 }
3096
3097 void
3098 ev_view_set_continuous (EvView   *view,
3099                         gboolean  continuous)
3100 {
3101         g_return_if_fail (EV_IS_VIEW (view));
3102
3103         continuous = continuous != FALSE;
3104
3105         if (view->continuous != continuous) {
3106                 view->continuous = continuous;
3107                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
3108                 gtk_widget_queue_resize (GTK_WIDGET (view));
3109         }
3110
3111         g_object_notify (G_OBJECT (view), "continuous");
3112 }
3113
3114 gboolean
3115 ev_view_get_dual_page (EvView *view)
3116 {
3117         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3118
3119         return view->dual_page;
3120 }
3121
3122 void
3123 ev_view_set_dual_page (EvView   *view,
3124                        gboolean  dual_page)
3125 {
3126         g_return_if_fail (EV_IS_VIEW (view));
3127
3128         dual_page = dual_page != FALSE;
3129
3130         if (view->dual_page == dual_page)
3131                 return;
3132
3133         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
3134         view->dual_page = dual_page;
3135         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
3136          * preload_cache_size to be 2 if dual_page is set.
3137          */
3138         gtk_widget_queue_resize (GTK_WIDGET (view));
3139
3140         g_object_notify (G_OBJECT (view), "dual-page");
3141 }
3142
3143 void
3144 ev_view_set_fullscreen (EvView   *view,
3145                          gboolean  fullscreen)
3146 {
3147         g_return_if_fail (EV_IS_VIEW (view));
3148
3149         fullscreen = fullscreen != FALSE;
3150
3151         if (view->fullscreen == fullscreen)
3152                 return;
3153
3154         view->fullscreen = fullscreen;
3155         gtk_widget_queue_resize (GTK_WIDGET (view));
3156
3157         g_object_notify (G_OBJECT (view), "fullscreen");
3158 }
3159
3160 gboolean
3161 ev_view_get_fullscreen (EvView *view)
3162 {
3163         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3164
3165         return view->fullscreen;
3166 }
3167
3168 void
3169 ev_view_set_presentation (EvView   *view,
3170                           gboolean  presentation)
3171 {
3172         g_return_if_fail (EV_IS_VIEW (view));
3173
3174         presentation = presentation != FALSE;
3175
3176         if (view->presentation == presentation)
3177                 return;
3178
3179         if (!presentation)
3180                 view->presentation_state = EV_PRESENTATION_NORMAL;
3181
3182         view->presentation = presentation;
3183         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
3184         gtk_widget_queue_resize (GTK_WIDGET (view));
3185
3186         if (GTK_WIDGET_REALIZED (view)) {
3187                 if (view->presentation)
3188                         gdk_window_set_background (GTK_WIDGET(view)->window,
3189                                                    &GTK_WIDGET (view)->style->black);
3190                 else
3191                         gdk_window_set_background (GTK_WIDGET(view)->window,
3192                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
3193         }
3194
3195         g_object_notify (G_OBJECT (view), "presentation");
3196 }
3197
3198 gboolean
3199 ev_view_get_presentation (EvView *view)
3200 {
3201         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3202
3203         return view->presentation;
3204 }
3205
3206 void
3207 ev_view_set_sizing_mode (EvView       *view,
3208                          EvSizingMode  sizing_mode)
3209 {
3210         g_return_if_fail (EV_IS_VIEW (view));
3211
3212         if (view->sizing_mode == sizing_mode)
3213                 return;
3214
3215         view->sizing_mode = sizing_mode;
3216         gtk_widget_queue_resize (GTK_WIDGET (view));
3217
3218         g_object_notify (G_OBJECT (view), "sizing-mode");
3219 }
3220
3221 EvSizingMode
3222 ev_view_get_sizing_mode (EvView *view)
3223 {
3224         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
3225
3226         return view->sizing_mode;
3227 }
3228
3229 gboolean
3230 ev_view_can_zoom_in (EvView *view)
3231 {
3232         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
3233 }
3234
3235 gboolean
3236 ev_view_can_zoom_out (EvView *view)
3237 {
3238         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
3239 }
3240
3241 void
3242 ev_view_zoom_in (EvView *view)
3243 {
3244         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
3245
3246         view->pending_scroll = SCROLL_TO_CENTER;
3247         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
3248 }
3249
3250 void
3251 ev_view_zoom_out (EvView *view)
3252 {
3253         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
3254
3255         view->pending_scroll = SCROLL_TO_CENTER;
3256         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
3257 }
3258
3259 void
3260 ev_view_rotate_right (EvView *view)
3261 {
3262         int rotation = view->rotation + 90;
3263
3264         if (rotation >= 360) {
3265                 rotation -= 360;
3266         }
3267
3268         ev_view_set_rotation (view, rotation);
3269 }
3270
3271 void
3272 ev_view_rotate_left (EvView *view)
3273 {
3274         int rotation = view->rotation - 90;
3275
3276         if (rotation < 0) {
3277                 rotation += 360;
3278         }
3279
3280         ev_view_set_rotation (view, rotation);
3281 }
3282
3283 void
3284 ev_view_set_rotation (EvView *view, int rotation)
3285 {
3286         view->rotation = rotation;
3287
3288         if (view->pixbuf_cache) {
3289                 ev_pixbuf_cache_clear (view->pixbuf_cache);
3290                 gtk_widget_queue_resize (GTK_WIDGET (view));
3291         }
3292
3293         if (rotation != 0)
3294                 clear_selection (view);
3295
3296         g_object_notify (G_OBJECT (view), "rotation");
3297 }
3298
3299 int
3300 ev_view_get_rotation (EvView *view)
3301 {
3302         return view->rotation;
3303 }
3304
3305 static double
3306 zoom_for_size_fit_width (int doc_width,
3307                          int doc_height,
3308                          int target_width,
3309                          int target_height,
3310                          int vsb_width)
3311 {
3312         double scale;
3313
3314         scale = (double)target_width / doc_width;
3315
3316         if (doc_height * scale > target_height)
3317                 scale = (double) (target_width - vsb_width) / doc_width;
3318
3319         return scale;
3320 }
3321
3322 static double
3323 zoom_for_size_fit_height (int doc_width,
3324                           int doc_height,
3325                           int target_width,
3326                           int target_height,
3327                           int vsb_height)
3328 {
3329         double scale;
3330
3331         scale = (double)target_height / doc_height;
3332
3333         if (doc_width * scale > target_width)
3334                 scale = (double) (target_height - vsb_height) / doc_height;
3335
3336         return scale;
3337 }
3338
3339 static double
3340 zoom_for_size_best_fit (int doc_width,
3341                         int doc_height,
3342                         int target_width,
3343                         int target_height,
3344                         int vsb_width,
3345                         int hsb_width)
3346 {
3347         double w_scale;
3348         double h_scale;
3349
3350         w_scale = (double)target_width / doc_width;
3351         h_scale = (double)target_height / doc_height;
3352
3353         if (doc_height * w_scale > target_height)
3354                 w_scale = (double) (target_width - vsb_width) / doc_width;
3355         if (doc_width * h_scale > target_width)
3356                 h_scale = (double) (target_height - hsb_width) / doc_height;
3357
3358         return MIN (w_scale, h_scale);
3359 }
3360
3361
3362 static void
3363 ev_view_zoom_for_size_presentation (EvView *view,
3364                                     int     width,
3365                                     int     height)
3366 {
3367         int doc_width, doc_height;
3368         gdouble scale;
3369
3370         ev_page_cache_get_size (view->page_cache,
3371                                 view->current_page,
3372                                 view->rotation,
3373                                 1.0,
3374                                 &doc_width,
3375                                 &doc_height);
3376         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
3377         ev_view_set_zoom (view, scale, FALSE);
3378 }
3379
3380 static void
3381 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
3382                            int     width,
3383                            int     height,
3384                            int     vsb_width,
3385                            int     hsb_height)
3386 {
3387         int doc_width, doc_height;
3388         GtkBorder border;
3389         gdouble scale;
3390
3391         ev_page_cache_get_max_width (view->page_cache,
3392                                      view->rotation,
3393                                      1.0,
3394                                      &doc_width);
3395         ev_page_cache_get_max_height (view->page_cache,
3396                                       view->rotation,
3397                                       1.0,
3398                                       &doc_height);
3399         compute_border (view, doc_width, doc_height, &border);
3400
3401         doc_width = doc_width * 2;
3402         width -= (2 * (border.left + border.right) + 3 * view->spacing);
3403         height -= (border.top + border.bottom + 2 * view->spacing - 1);
3404
3405         /* FIXME: We really need to calculate the overall height here, not the
3406          * page height.  We assume there's always a vertical scrollbar for
3407          * now.  We need to fix this. */
3408         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3409                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
3410         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3411                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
3412         else
3413                 g_assert_not_reached ();
3414
3415         ev_view_set_zoom (view, scale, FALSE);
3416 }
3417
3418 static void
3419 ev_view_zoom_for_size_continuous (EvView *view,
3420                                   int     width,
3421                                   int     height,
3422                                   int     vsb_width,
3423                                   int     hsb_height)
3424 {
3425         int doc_width, doc_height;
3426         GtkBorder border;
3427         gdouble scale;
3428
3429         ev_page_cache_get_max_width (view->page_cache,
3430                                      view->rotation,
3431                                      1.0,
3432                                      &doc_width);
3433         ev_page_cache_get_max_height (view->page_cache,
3434                                       view->rotation,
3435                                       1.0,
3436                                       &doc_height);
3437         compute_border (view, doc_width, doc_height, &border);
3438
3439         width -= (border.left + border.right + 2 * view->spacing);
3440         height -= (border.top + border.bottom + 2 * view->spacing - 1);
3441
3442         /* FIXME: We really need to calculate the overall height here, not the
3443          * page height.  We assume there's always a vertical scrollbar for
3444          * now.  We need to fix this. */
3445         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3446                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
3447         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3448                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
3449         else
3450                 g_assert_not_reached ();
3451
3452         ev_view_set_zoom (view, scale, FALSE);
3453 }
3454
3455 static void
3456 ev_view_zoom_for_size_dual_page (EvView *view,
3457                                  int     width,
3458                                  int     height,
3459                                  int     vsb_width,
3460                                  int     hsb_height)
3461 {
3462         GtkBorder border;
3463         gint doc_width, doc_height;
3464         gdouble scale;
3465         gint other_page;
3466
3467         other_page = view->current_page ^ 1;
3468
3469         /* Find the largest of the two. */
3470         ev_page_cache_get_size (view->page_cache,
3471                                 view->current_page,
3472                                 view->rotation,
3473                                 1.0,
3474                                 &doc_width, &doc_height);
3475
3476         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
3477                 gint width_2, height_2;
3478                 ev_page_cache_get_size (view->page_cache,
3479                                         other_page,
3480                                         view->rotation,
3481                                         1.0,
3482                                         &width_2, &height_2);
3483                 if (width_2 > doc_width)
3484                         doc_width = width_2;
3485                 if (height_2 > doc_height)
3486                         doc_height = height_2;
3487         }
3488         compute_border (view, doc_width, doc_height, &border);
3489
3490         doc_width = doc_width * 2;
3491         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
3492         height -= (border.top + border.bottom + 2 * view->spacing);
3493
3494         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3495                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
3496         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3497                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
3498         else
3499                 g_assert_not_reached ();
3500
3501         ev_view_set_zoom (view, scale, FALSE);
3502 }
3503
3504 static void
3505 ev_view_zoom_for_size_single_page (EvView *view,
3506                                    int     width,
3507                                    int     height,
3508                                    int     vsb_width,
3509                                    int     hsb_height)
3510 {
3511         int doc_width, doc_height;
3512         GtkBorder border;
3513         gdouble scale;
3514
3515         ev_page_cache_get_size (view->page_cache,
3516                                 view->current_page,
3517                                 view->rotation,
3518                                 1.0,
3519                                 &doc_width,
3520                                 &doc_height);
3521         /* Get an approximate border */
3522         compute_border (view, width, height, &border);
3523
3524         width -= (border.left + border.right + 2 * view->spacing);
3525         height -= (border.top + border.bottom + 2 * view->spacing);
3526
3527         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3528                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
3529         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3530                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
3531         else
3532                 g_assert_not_reached ();
3533
3534         ev_view_set_zoom (view, scale, FALSE);
3535 }
3536
3537 void
3538 ev_view_set_zoom_for_size (EvView *view,
3539                            int     width,
3540                            int     height,
3541                            int     vsb_width,
3542                            int     hsb_height)
3543 {
3544         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3545                           view->sizing_mode == EV_SIZING_BEST_FIT);
3546         g_return_if_fail (width >= 0);
3547         g_return_if_fail (height >= 0);
3548
3549         if (view->document == NULL)
3550                 return;
3551
3552         if (view->presentation)
3553                 ev_view_zoom_for_size_presentation (view, width, height);
3554         else if (view->continuous && view->dual_page)
3555                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
3556         else if (view->continuous)
3557                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
3558         else if (view->dual_page)
3559                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
3560         else
3561                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
3562 }
3563
3564 /*** Status text messages ***/
3565
3566 const char *
3567 ev_view_get_status (EvView *view)
3568 {
3569         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
3570
3571         return view->status;
3572 }
3573
3574 static void
3575 ev_view_set_status (EvView *view, const char *message)
3576 {
3577         g_return_if_fail (EV_IS_VIEW (view));
3578
3579         if (message != view->status) {
3580                 g_free (view->status);
3581                 view->status = g_strdup (message);
3582                 g_object_notify (G_OBJECT (view), "status");
3583         }
3584 }
3585
3586 static void
3587 update_find_status_message (EvView *view, gboolean this_page)
3588 {
3589         char *message;
3590
3591         if (this_page) {
3592                 int results;
3593
3594                 results = ev_document_find_get_n_results
3595                                 (EV_DOCUMENT_FIND (view->document),
3596                                  view->current_page);
3597                 /* TRANS: Sometimes this could be better translated as
3598                    "%d hit(s) on this page".  Therefore this string
3599                    contains plural cases. */
3600                 message = g_strdup_printf (ngettext ("%d found on this page",
3601                                                      "%d found on this page",
3602                                                      results),
3603                                            results);
3604         } else {
3605                 double percent;
3606
3607                 percent = ev_document_find_get_progress
3608                                 (EV_DOCUMENT_FIND (view->document));
3609                 message = g_strdup_printf (_("%3d%% remaining to search"),
3610                                            (int) ((1.0 - percent) * 100));
3611
3612         }
3613         ev_view_set_find_status (view, message);
3614         g_free (message);
3615 }
3616
3617 const char *
3618 ev_view_get_find_status (EvView *view)
3619 {
3620         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
3621
3622         return view->find_status;
3623 }
3624
3625 static void
3626 ev_view_set_find_status (EvView *view, const char *message)
3627 {
3628         g_return_if_fail (EV_IS_VIEW (view));
3629
3630         g_free (view->find_status);
3631         view->find_status = g_strdup (message);
3632         g_object_notify (G_OBJECT (view), "find-status");
3633 }
3634
3635 /*** Find ***/
3636
3637 static void
3638 jump_to_find_result (EvView *view)
3639 {
3640         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3641         EvRectangle rect;
3642         GdkRectangle view_rect;
3643         int n_results;
3644         int page = view->current_page;
3645
3646         n_results = ev_document_find_get_n_results (find, page);
3647
3648         if (n_results > 0  && view->find_result < n_results) {
3649                 ev_document_find_get_result
3650                         (find, page, view->find_result, &rect);
3651
3652                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
3653                 ensure_rectangle_is_visible (view, &view_rect);
3654         }
3655 }
3656
3657 /**
3658  * jump_to_find_page
3659  * @view: #EvView instance
3660  * @direction: Direction to look
3661  * @shift: Shift from current page
3662  *
3663  * Jumps to the first page that has occurences of searched word.
3664  * Uses a direction where to look and a shift from current page.
3665  *
3666  */
3667 static void
3668 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
3669 {
3670         int n_pages, i;
3671
3672         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3673
3674         for (i = 0; i < n_pages; i++) {
3675                 int has_results;
3676                 int page;
3677
3678                 if (direction == EV_VIEW_FIND_NEXT)
3679                         page = view->current_page + i;
3680                 else
3681                         page = view->current_page - i;
3682                 page += shift;
3683
3684                 if (page >= n_pages) {
3685                         page = page - n_pages;
3686                 }
3687                 if (page < 0)
3688                         page = page + n_pages;
3689
3690                 has_results = ev_document_find_page_has_results
3691                                 (EV_DOCUMENT_FIND (view->document), page);
3692                 if (has_results == -1) {
3693                         break;
3694                 } else if (has_results == 1) {
3695                         ev_page_cache_set_current_page (view->page_cache, page);
3696                         break;
3697                 }
3698         }
3699 }
3700
3701 gboolean
3702 ev_view_can_find_next (EvView *view)
3703 {
3704         if (EV_IS_DOCUMENT_FIND (view->document)) {
3705                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3706                 int i, n_pages;
3707
3708                 n_pages = ev_page_cache_get_n_pages (view->page_cache);
3709                 for (i = 0; i < n_pages; i++) {
3710                         if (ev_document_find_get_n_results (find, i) > 0) {
3711                                 return TRUE;
3712                         }
3713                 }
3714         }
3715
3716         return FALSE;
3717 }
3718
3719 void
3720 ev_view_find_next (EvView *view)
3721 {
3722         int n_results, n_pages;
3723         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3724
3725         n_results = ev_document_find_get_n_results (find, view->current_page);
3726
3727         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3728
3729         view->find_result++;
3730
3731         if (view->find_result >= n_results) {
3732
3733                 view->find_result = 0;
3734                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
3735                 jump_to_find_result (view);
3736         } else {
3737                 jump_to_find_result (view);
3738                 gtk_widget_queue_draw (GTK_WIDGET (view));
3739         }
3740 }
3741
3742 gboolean
3743 ev_view_can_find_previous (EvView *view)
3744 {
3745         if (EV_IS_DOCUMENT_FIND (view->document)) {
3746                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3747                 int i, n_pages;
3748
3749                 n_pages = ev_page_cache_get_n_pages (view->page_cache);
3750                 for (i = n_pages - 1; i >= 0; i--) {
3751                         if (ev_document_find_get_n_results (find, i) > 0) {
3752                                 return TRUE;
3753                         }
3754                 }
3755         }
3756
3757         return FALSE;
3758 }
3759 void
3760 ev_view_find_previous (EvView *view)
3761 {
3762         int n_results, n_pages;
3763         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3764         EvPageCache *page_cache;
3765
3766         page_cache = ev_page_cache_get (view->document);
3767
3768         n_results = ev_document_find_get_n_results (find, view->current_page);
3769
3770         n_pages = ev_page_cache_get_n_pages (page_cache);
3771
3772         view->find_result--;
3773
3774         if (view->find_result < 0) {
3775
3776                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
3777                 view->find_result = ev_document_find_get_n_results (find, view->current_page) - 1;
3778                 jump_to_find_result (view);
3779         } else {
3780                 jump_to_find_result (view);
3781                 gtk_widget_queue_draw (GTK_WIDGET (view));
3782         }
3783 }
3784
3785 void ev_view_search_changed (EvView *view)
3786 {
3787         /* search string has changed, focus on new search result */
3788         view->jump_to_find_result = TRUE;
3789 }
3790
3791 /*** Selections ***/
3792
3793 /* compute_new_selection_rect/text calculates the area currently selected by
3794  * view_rect.  each handles a different mode;
3795  */
3796 static GList *
3797 compute_new_selection_rect (EvView       *view,
3798                             GdkPoint     *start,
3799                             GdkPoint     *stop)
3800 {
3801         GdkRectangle view_rect;
3802         int n_pages, i;
3803         GList *list = NULL;
3804
3805         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
3806
3807         view_rect.x = MIN (start->x, stop->x);
3808         view_rect.y = MIN (start->y, stop->y);
3809         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
3810         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
3811
3812         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3813
3814         for (i = 0; i < n_pages; i++) {
3815                 GdkRectangle page_area;
3816                 GtkBorder border;
3817
3818                 if (get_page_extents (view, i, &page_area, &border)) {
3819                         GdkRectangle overlap;
3820
3821                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
3822                                 EvViewSelection *selection;
3823
3824                                 selection = g_new0 (EvViewSelection, 1);
3825                                 selection->page = i;
3826                                 view_rect_to_doc_rect (view, &overlap, &page_area,
3827                                                        &(selection->rect));
3828
3829                                 list = g_list_append (list, selection);
3830                         }
3831                 }
3832         }
3833
3834         return list;
3835 }
3836
3837 static gboolean
3838 gdk_rectangle_point_in (GdkRectangle *rectangle,
3839                         GdkPoint     *point)
3840 {
3841         return rectangle->x <= point->x &&
3842                 rectangle->y <= point->y &&
3843                 point->x < rectangle->x + rectangle->width &&
3844                 point->y < rectangle->y + rectangle->height;
3845 }
3846
3847 static GList *
3848 compute_new_selection_text (EvView   *view,
3849                             GdkPoint *start,
3850                             GdkPoint *stop)
3851 {
3852         int n_pages, i, first, last;
3853         GList *list = NULL;
3854         EvViewSelection *selection;
3855         gint width, height;
3856         int start_page, end_page;
3857
3858         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
3859
3860         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3861
3862         /* First figure out the range of pages the selection
3863          * affects. */
3864         first = n_pages;
3865         last = 0;
3866         if (view->continuous) {
3867                 start_page = 0;
3868                 end_page = n_pages;
3869         } else if (view->dual_page) {
3870                 start_page = view->start_page;
3871                 end_page = view->end_page + 1;
3872         } else {
3873                 start_page = view->current_page;
3874                 end_page = view->current_page + 1;
3875         }
3876
3877         for (i = start_page; i < end_page; i++) {
3878                 GdkRectangle page_area;
3879                 GtkBorder border;
3880
3881                 get_page_extents (view, i, &page_area, &border);
3882                 if (gdk_rectangle_point_in (&page_area, start) ||
3883                     gdk_rectangle_point_in (&page_area, stop)) {
3884                         if (first == n_pages)
3885                                 first = i;
3886                         last = i;
3887                 }
3888
3889         }
3890
3891
3892
3893         /* Now create a list of EvViewSelection's for the affected
3894          * pages.  This could be an empty list, a list of just one
3895          * page or a number of pages.*/
3896         for (i = first; i < last + 1; i++) {
3897                 GdkRectangle page_area;
3898                 GtkBorder border;
3899                 GdkPoint *point;
3900
3901                 ev_page_cache_get_size (view->page_cache, i,
3902                                         view->rotation,
3903                                         1.0, &width, &height);
3904
3905                 selection = g_new0 (EvViewSelection, 1);
3906                 selection->page = i;
3907                 selection->rect.x1 = selection->rect.y1 = 0;
3908                 selection->rect.x2 = width;
3909                 selection->rect.y2 = height;
3910
3911                 get_page_extents (view, i, &page_area, &border);
3912
3913                 if (gdk_rectangle_point_in (&page_area, start))
3914                         point = start;
3915                 else
3916                         point = stop;
3917
3918                 if (i == first)
3919                         view_point_to_doc_point (view, point, &page_area,
3920                                                  &selection->rect.x1,
3921                                                  &selection->rect.y1);
3922
3923                 /* If the selection is contained within just one page,
3924                  * make sure we don't write 'start' into both points
3925                  * in selection->rect. */
3926                 if (first == last)
3927                         point = stop;
3928
3929                 if (i == last)
3930                         view_point_to_doc_point (view, point, &page_area,
3931                                                  &selection->rect.x2,
3932                                                  &selection->rect.y2);
3933
3934                 list = g_list_append (list, selection);
3935         }
3936
3937         return list;
3938 }
3939
3940 /* This function takes the newly calculated list, and figures out which regions
3941  * have changed.  It then queues a redraw approporiately.
3942  */
3943 static void
3944 merge_selection_region (EvView *view,
3945                         GList  *new_list)
3946 {
3947         GList *old_list;
3948         GList *new_list_ptr, *old_list_ptr;
3949
3950         /* Update the selection */
3951         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
3952         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
3953         view->selection_info.selections = new_list;
3954         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
3955         g_object_notify (G_OBJECT (view), "has-selection");
3956
3957         new_list_ptr = new_list;
3958         old_list_ptr = old_list;
3959
3960         while (new_list_ptr || old_list_ptr) {
3961                 EvViewSelection *old_sel, *new_sel;
3962                 int cur_page;
3963                 GdkRegion *region = NULL;
3964
3965                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
3966                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
3967
3968                 /* Assume that the lists are in order, and we run through them
3969                  * comparing them, one page at a time.  We come out with the
3970                  * first page we see. */
3971                 if (new_sel && old_sel) {
3972                         if (new_sel->page < old_sel->page) {
3973                                 new_list_ptr = new_list_ptr->next;
3974                                 old_sel = NULL;
3975                         } else if (new_sel->page > old_sel->page) {
3976                                 old_list_ptr = old_list_ptr->next;
3977                                 new_sel = NULL;
3978                         } else {
3979                                 new_list_ptr = new_list_ptr->next;
3980                                 old_list_ptr = old_list_ptr->next;
3981                         }
3982                 } else if (new_sel) {
3983                         new_list_ptr = new_list_ptr->next;
3984                 } else if (old_sel) {
3985                         old_list_ptr = old_list_ptr->next;
3986                 }
3987
3988                 g_assert (new_sel || old_sel);
3989
3990                 /* is the page we're looking at on the screen?*/
3991                 cur_page = new_sel ? new_sel->page : old_sel->page;
3992                 if (cur_page < view->start_page || cur_page > view->end_page)
3993                         continue;
3994
3995                 /* seed the cache with a new page.  We are going to need the new
3996                  * region too. */
3997                 if (new_sel) {
3998                         GdkRegion *tmp_region = NULL;
3999                         ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
4000                                                               cur_page,
4001                                                               view->scale,
4002                                                               &tmp_region);
4003                         if (tmp_region) {
4004                                 new_sel->covered_region = gdk_region_copy (tmp_region);
4005                         }
4006                 }
4007
4008                 /* Now we figure out what needs redrawing */
4009                 if (old_sel && new_sel) {
4010                         if (old_sel->covered_region &&
4011                             new_sel->covered_region) {
4012                                 /* We only want to redraw the areas that have
4013                                  * changed, so we xor the old and new regions
4014                                  * and redraw if it's different */
4015                                 region = gdk_region_copy (old_sel->covered_region);
4016                                 gdk_region_xor (region, new_sel->covered_region);
4017                                 if (gdk_region_empty (region)) {
4018                                         gdk_region_destroy (region);
4019                                         region = NULL;
4020                                 }
4021                         } else if (old_sel->covered_region) {
4022                                 region = gdk_region_copy (old_sel->covered_region);
4023                         } else if (new_sel->covered_region) {
4024                                 region = gdk_region_copy (new_sel->covered_region);
4025                         }
4026                 } else if (old_sel && !new_sel) {
4027                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
4028                                 region = gdk_region_copy (old_sel->covered_region);
4029                         }
4030                 } else if (!old_sel && new_sel) {
4031                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
4032                                 region = gdk_region_copy (new_sel->covered_region);
4033                         }
4034                 } else {
4035                         g_assert_not_reached ();
4036                 }
4037
4038                 /* Redraw the damaged region! */
4039                 if (region) {
4040                         GdkRectangle page_area;
4041                         GtkBorder border;
4042
4043                         get_page_extents (view, cur_page, &page_area, &border);
4044                         gdk_region_offset (region,
4045                                            page_area.x + border.left - view->scroll_x,
4046                                            page_area.y + border.top - view->scroll_y);
4047                         gdk_window_invalidate_region (GTK_WIDGET (view)->window, region, TRUE);
4048                         gdk_region_destroy (region);
4049                 }
4050         }
4051
4052         /* Free the old list, now that we're done with it. */
4053         g_list_foreach (old_list, (GFunc) selection_free, NULL);
4054 }
4055
4056 static void
4057 compute_selections (EvView   *view,
4058                     GdkPoint *start,
4059                     GdkPoint *stop)
4060 {
4061         GList *list;
4062
4063         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
4064                 list = compute_new_selection_rect (view, start, stop);
4065         else
4066                 list = compute_new_selection_text (view, start, stop);
4067         merge_selection_region (view, list);
4068 }
4069
4070 /* Free's the selection.  It's up to the caller to queue redraws if needed.
4071  */
4072 static void
4073 selection_free (EvViewSelection *selection)
4074 {
4075         if (selection->covered_region)
4076                 gdk_region_destroy (selection->covered_region);
4077         g_free (selection);
4078 }
4079
4080 static void
4081 clear_selection (EvView *view)
4082 {
4083         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
4084         view->selection_info.selections = NULL;
4085         view->selection_info.in_selection = FALSE;
4086         g_object_notify (G_OBJECT (view), "has-selection");
4087 }
4088
4089
4090 void
4091 ev_view_select_all (EvView *view)
4092 {
4093         int n_pages, i;
4094
4095         /* Disable selection on rotated pages for the 0.4.0 series */
4096         if (view->rotation != 0)
4097                 return;
4098
4099         clear_selection (view);
4100
4101         n_pages = ev_page_cache_get_n_pages (view->page_cache);
4102         for (i = 0; i < n_pages; i++) {
4103                 int width, height;
4104                 EvViewSelection *selection;
4105
4106                 ev_page_cache_get_size (view->page_cache,
4107                                         i,
4108                                         view->rotation,
4109                                         1.0, &width, &height);
4110
4111                 selection = g_new0 (EvViewSelection, 1);
4112                 selection->page = i;
4113                 selection->rect.x1 = selection->rect.y1 = 0;
4114                 selection->rect.x2 = width;
4115                 selection->rect.y2 = height;
4116
4117                 view->selection_info.selections = g_list_append (view->selection_info.selections, selection);
4118         }
4119
4120         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, view->selection_info.selections);
4121         g_object_notify (G_OBJECT (view), "has-selection");
4122         gtk_widget_queue_draw (GTK_WIDGET (view));
4123 }
4124
4125 gboolean
4126 ev_view_get_has_selection (EvView *view)
4127 {
4128         return view->selection_info.selections != NULL;
4129 }
4130
4131 static char *
4132 get_selected_text (EvView *ev_view)
4133 {
4134         GString *text;
4135         GList *l;
4136
4137         text = g_string_new (NULL);
4138
4139         ev_document_doc_mutex_lock ();
4140
4141         for (l = ev_view->selection_info.selections; l != NULL; l = l->next) {
4142                 EvViewSelection *selection = (EvViewSelection *)l->data;
4143                 char *tmp;
4144
4145                 tmp = ev_document_get_text (ev_view->document,
4146                                             selection->page,
4147                                             &selection->rect);
4148                 g_string_append (text, tmp);
4149                 g_free (tmp);
4150         }
4151
4152         ev_document_doc_mutex_unlock ();
4153
4154         return g_string_free (text, FALSE);
4155 }
4156
4157 void
4158 ev_view_copy (EvView *ev_view)
4159 {
4160         GtkClipboard *clipboard;
4161         char *text;
4162
4163         if (!ev_document_can_get_text (ev_view->document)) {
4164                 return;
4165         }
4166
4167         text = get_selected_text (ev_view);
4168         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
4169                                               GDK_SELECTION_CLIPBOARD);
4170         gtk_clipboard_set_text (clipboard, text, -1);
4171         g_free (text);
4172 }
4173
4174 static void
4175 ev_view_primary_get_cb (GtkClipboard     *clipboard,
4176                         GtkSelectionData *selection_data,
4177                         guint             info,
4178                         gpointer          data)
4179 {
4180         EvView *ev_view = EV_VIEW (data);
4181         char *text;
4182
4183         if (!ev_document_can_get_text (ev_view->document)) {
4184                 return;
4185         }
4186
4187         text = get_selected_text (ev_view);
4188         gtk_selection_data_set_text (selection_data, text, -1);
4189         g_free (text);
4190 }
4191
4192 static void
4193 ev_view_primary_clear_cb (GtkClipboard *clipboard,
4194                           gpointer      data)
4195 {
4196         EvView *view = EV_VIEW (data);
4197
4198         clear_selection (view);
4199 }
4200
4201 static void
4202 ev_view_update_primary_selection (EvView *ev_view)
4203 {
4204         GtkClipboard *clipboard;
4205
4206         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
4207                                               GDK_SELECTION_PRIMARY);
4208
4209         if (ev_view->selection_info.selections) {
4210                 if (!gtk_clipboard_set_with_owner (clipboard,
4211                                                    targets,
4212                                                    G_N_ELEMENTS (targets),
4213                                                    ev_view_primary_get_cb,
4214                                                    ev_view_primary_clear_cb,
4215                                                    G_OBJECT (ev_view)))
4216                         ev_view_primary_clear_cb (clipboard, ev_view);
4217         } else {
4218                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
4219                         gtk_clipboard_clear (clipboard);
4220         }
4221 }
4222
4223 /*** Cursor operations ***/
4224
4225 static GdkCursor *
4226 ev_view_create_invisible_cursor(void)
4227 {
4228        GdkBitmap *empty;
4229        GdkColor black = { 0, 0, 0, 0 };
4230        static char bits[] = { 0x00 };
4231
4232        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
4233
4234        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
4235 }
4236
4237 static void
4238 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
4239 {
4240         GdkCursor *cursor = NULL;
4241         GdkDisplay *display;
4242         GtkWidget *widget;
4243
4244         if (view->cursor == new_cursor) {
4245                 return;
4246         }
4247
4248         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
4249         display = gtk_widget_get_display (widget);
4250         view->cursor = new_cursor;
4251
4252         switch (new_cursor) {
4253                 case EV_VIEW_CURSOR_NORMAL:
4254                         gdk_window_set_cursor (widget->window, NULL);
4255                         break;
4256                 case EV_VIEW_CURSOR_IBEAM:
4257                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
4258                         break;
4259                 case EV_VIEW_CURSOR_LINK:
4260                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
4261                         break;
4262                 case EV_VIEW_CURSOR_WAIT:
4263                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
4264                         break;
4265                 case EV_VIEW_CURSOR_HIDDEN:
4266                         cursor = ev_view_create_invisible_cursor ();
4267                         break;
4268                 case EV_VIEW_CURSOR_DRAG:
4269                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
4270                         break;
4271         }
4272
4273         if (cursor) {
4274                 gdk_window_set_cursor (widget->window, cursor);
4275                 gdk_cursor_unref (cursor);
4276                 gdk_flush();
4277         }
4278 }
4279
4280 void
4281 ev_view_hide_cursor (EvView *view)
4282 {
4283        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
4284 }
4285
4286 void
4287 ev_view_show_cursor (EvView *view)
4288 {
4289        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4290 }
4291
4292 static void
4293 ev_view_reset_presentation_state (EvView *view)
4294 {
4295         if (!view->presentation ||
4296             view->presentation_state == EV_PRESENTATION_NORMAL)
4297                 return;
4298
4299         view->presentation_state = EV_PRESENTATION_NORMAL;
4300         gdk_window_set_background (GTK_WIDGET (view)->window,
4301                                    &GTK_WIDGET (view)->style->black);
4302         gtk_widget_queue_draw (GTK_WIDGET (view));
4303 }
4304
4305 gboolean
4306 ev_view_next_page (EvView *view)
4307 {
4308         int page, n_pages;
4309
4310         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4311
4312         if (!view->page_cache)
4313                 return FALSE;
4314
4315         ev_view_reset_presentation_state (view);
4316
4317         page = ev_page_cache_get_current_page (view->page_cache);
4318         n_pages = ev_page_cache_get_n_pages (view->page_cache);
4319
4320         if (view->dual_page && !view->presentation)
4321                 page = page + 2;
4322         else
4323                 page = page + 1;
4324
4325         if (page < n_pages) {
4326                 ev_page_cache_set_current_page (view->page_cache, page);
4327                 return TRUE;
4328         } else if (view->presentation && page == n_pages) {
4329                 view->presentation_state = EV_PRESENTATION_END;
4330                 gtk_widget_queue_draw (GTK_WIDGET (view));
4331                 return TRUE;
4332         } else if (view->dual_page && page == n_pages) {
4333                 ev_page_cache_set_current_page (view->page_cache, page - 1);
4334                 return TRUE;
4335         } else {
4336                 return FALSE;
4337         }
4338 }
4339
4340 gboolean
4341 ev_view_previous_page (EvView *view)
4342 {
4343         int page;
4344
4345         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4346
4347         if (!view->page_cache)
4348                 return FALSE;
4349
4350         if (view->presentation &&
4351             view->presentation_state == EV_PRESENTATION_END) {
4352                 ev_view_reset_presentation_state (view);
4353                 return TRUE;
4354         }
4355
4356         ev_view_reset_presentation_state (view);
4357
4358         page = ev_page_cache_get_current_page (view->page_cache);
4359
4360         if (view->dual_page && !view->presentation)
4361                 page = page - 2;
4362         else
4363                 page = page - 1;
4364
4365         if (page >= 0) {
4366                 ev_page_cache_set_current_page (view->page_cache, page);
4367                 return TRUE;
4368         } else if (ev_view_get_dual_page (view) && page == -1) {
4369                 ev_page_cache_set_current_page (view->page_cache, 0);
4370                 return TRUE;
4371         } else {
4372                 return FALSE;
4373         }
4374 }
4375
4376 /*** Enum description for usage in signal ***/
4377
4378 GType
4379 ev_sizing_mode_get_type (void)
4380 {
4381   static GType etype = 0;
4382   if (etype == 0) {
4383     static const GEnumValue values[] = {
4384       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
4385       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
4386       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
4387       { 0, NULL, NULL }
4388     };
4389     etype = g_enum_register_static ("EvSizingMode", values);
4390   }
4391   return etype;
4392 }
4393
4394 GType
4395 ev_scroll_type_get_type (void)
4396 {
4397   static GType etype = 0;
4398   if (etype == 0) {
4399     static const GEnumValue values[] = {
4400       { EV_SCROLL_PAGE_FORWARD, "EV_SCROLL_PAGE_FORWARD", "scroll-page-forward" },
4401       { EV_SCROLL_PAGE_BACKWARD, "EV_SCROLL_PAGE_BACKWARD", "scroll-page-backward" },
4402       { EV_SCROLL_STEP_FORWARD, "EV_SCROLL_STEP_FORWARD", "scroll-step-forward" },
4403       { EV_SCROLL_STEP_FORWARD, "EV_SCROLL_STEP_FORWARD", "scroll-step-forward" },
4404       { EV_SCROLL_STEP_UP, "EV_SCROLL_STEP_UP", "scroll-step-up" },
4405       { EV_SCROLL_STEP_DOWN, "EV_SCROLL_STEP_DOWN", "scroll-step-down" },
4406       { 0, NULL, NULL }
4407     };
4408     etype = g_enum_register_static ("EvScrollType", values);
4409   }
4410   return etype;
4411 }