shell/ev-view.c

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