libview/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 "config.h"
  22
  23 #include <stdlib.h>
  24 #include <math.h>
  25 #include <string.h>
  26
  27 #include <glib/gi18n-lib.h>
  28 #include <gtk/gtk.h>
  29 #include <gdk/gdkkeysyms.h>
  30
  31 #include "ev-mapping.h"
  32 #include "ev-document-forms.h"
  33 #include "ev-document-images.h"
  34 #include "ev-document-links.h"
  35 #include "ev-document-misc.h"
  36 #include "ev-document-transition.h"
  37 #include "ev-page-cache.h"
  38 #include "ev-pixbuf-cache.h"
  39 #include "ev-transition-animation.h"
  40 #include "ev-view-marshal.h"
  41 #include "ev-document-annotations.h"
  42 #include "ev-annotation-window.h"
  43 #include "ev-view.h"
  44 #include "ev-view-accessible.h"
  45 #include "ev-view-private.h"
  46 #include "ev-view-type-builtins.h"
  47
  48 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  49 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  50 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  51
  52 enum {
  53         PROP_0,
  54         PROP_CONTINUOUS,
  55         PROP_DUAL_PAGE,
  56         PROP_FULLSCREEN,
  57         PROP_PRESENTATION,
  58         PROP_SIZING_MODE,
  59         PROP_ZOOM,
  60         PROP_ROTATION,
  61         PROP_HAS_SELECTION,
  62 };
  63
  64 enum {
  65         SIGNAL_BINDING_ACTIVATED,
  66         SIGNAL_ZOOM_INVALID,
  67         SIGNAL_HANDLE_LINK,
  68         SIGNAL_EXTERNAL_LINK,
  69         SIGNAL_POPUP_MENU,
  70         N_SIGNALS,
  71 };
  72
  73 enum {
  74         TARGET_DND_URI,
  75         TARGET_DND_TEXT,
  76         TARGET_DND_IMAGE
  77 };
  78
  79 static guint signals[N_SIGNALS];
  80
  81 typedef enum {
  82         EV_VIEW_FIND_NEXT,
  83         EV_VIEW_FIND_PREV
  84 } EvViewFindDirection;
  85
  86 #define ZOOM_IN_FACTOR  1.2
  87 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  88
  89 #define MIN_SCALE 0.05409
  90 #define MAX_SCALE 4.0
  91
  92 #define SCROLL_TIME 150
  93
  94 /*** Scrolling ***/
  95 static void       scroll_to_current_page                     (EvView *view,
  96                                                               GtkOrientation orientation);
  97 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  98                                                               GtkAdjustment      *hadjustment,
  99                                                               GtkAdjustment      *vadjustment);
 100 static void       view_update_range_and_current_page         (EvView             *view);
 101 static void       set_scroll_adjustment                      (EvView             *view,
 102                                                               GtkOrientation      orientation,
 103                                                               GtkAdjustment      *adjustment);
 104 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 105                                                               guint               keyval,
 106                                                               GdkModifierType modifiers,
 107                                                               GtkScrollType       scroll,
 108                                                               gboolean            horizontal);
 109 static void       ensure_rectangle_is_visible                (EvView             *view,
 110                                                               GdkRectangle       *rect);
 111
 112 /*** Geometry computations ***/
 113 static void       compute_border                             (EvView             *view,
 114                                                               int                 width,
 115                                                               int                 height,
 116                                                               GtkBorder          *border);
 117 static void       get_page_y_offset                          (EvView *view,
 118                                                               int page,
 119                                                               double zoom,
 120                                                               int *y_offset);
 121 static gboolean   get_page_extents                           (EvView             *view,
 122                                                               gint                page,
 123                                                               GdkRectangle       *page_area,
 124                                                               GtkBorder          *border);
 125 static void       view_rect_to_doc_rect                      (EvView             *view,
 126                                                               GdkRectangle       *view_rect,
 127                                                               GdkRectangle       *page_area,
 128                                                               EvRectangle        *doc_rect);
 129 static void       doc_rect_to_view_rect                      (EvView             *view,
 130                                                               int                 page,
 131                                                               EvRectangle        *doc_rect,
 132                                                               GdkRectangle       *view_rect);
 133 static void       find_page_at_location                      (EvView             *view,
 134                                                               gdouble             x,
 135                                                               gdouble             y,
 136                                                               gint               *page,
 137                                                               gint               *x_offset,
 138                                                               gint               *y_offset);
 139 static gboolean  doc_point_to_view_point                     (EvView             *view,
 140                                                               int                 page,
 141                                                               EvPoint            *doc_point,
 142                                                               GdkPoint           *view_point);
 143 /*** Hyperrefs ***/
 144 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 145                                                               gdouble             x,
 146                                                               gdouble             y);
 147 static char*      tip_from_link                              (EvView             *view,
 148                                                               EvLink             *link);
 149 /*** Forms ***/
 150 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 151                                                                gdouble            x,
 152                                                                gdouble            y);
 153
 154 /*** Annotations ***/
 155 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 156                                                               gdouble             x,
 157                                                               gdouble             y);
 158 static void          show_annotation_windows                 (EvView             *view,
 159                                                               gint                page);
 160 static void          hide_annotation_windows                 (EvView             *view,
 161                                                               gint                page);
 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 static void       ev_view_remove_all                         (EvView             *view);
 194
 195 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 196
 197 /*** Drawing ***/
 198 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 199 static void       draw_rubberband                            (GtkWidget          *widget,
 200                                                               GdkWindow          *window,
 201                                                               const GdkRectangle *rect,
 202                                                               guchar              alpha);
 203 static void       highlight_find_results                     (EvView             *view,
 204                                                               int                 page);
 205 static void       draw_one_page                              (EvView             *view,
 206                                                               gint                page,
 207                                                               cairo_t            *cr,
 208                                                               GdkRectangle       *page_area,
 209                                                               GtkBorder          *border,
 210                                                               GdkRectangle       *expose_area,
 211                                                               gboolean           *page_ready);
 212 static void       draw_loading_text                          (EvView             *view,
 213                                                               GdkRectangle       *page_area,
 214                                                               GdkRectangle       *expose_area);
 215 static void       ev_view_reload_page                        (EvView             *view,
 216                                                               gint                page,
 217                                                               GdkRegion          *region);
 218
 219 /*** Callbacks ***/
 220 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 221                                                               GdkRegion          *region,
 222                                                               EvView             *view);
 223 static void       page_changed_cb                            (EvPageCache        *page_cache,
 224                                                               int                 new_page,
 225                                                               EvView             *view);
 226 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 227                                                               EvView             *view);
 228
 229 /*** GObject ***/
 230 static void       ev_view_finalize                           (GObject            *object);
 231 static void       ev_view_destroy                            (GtkObject          *object);
 232 static void       ev_view_set_property                       (GObject            *object,
 233                                                               guint               prop_id,
 234                                                               const GValue       *value,
 235                                                               GParamSpec         *pspec);
 236 static void       ev_view_get_property                       (GObject            *object,
 237                                                               guint               prop_id,
 238                                                               GValue             *value,
 239                                                               GParamSpec         *pspec);
 240 static void       ev_view_class_init                         (EvViewClass        *class);
 241 static void       ev_view_init                               (EvView             *view);
 242
 243 /*** Zoom and sizing ***/
 244 static double   zoom_for_size_fit_width                      (int doc_width,
 245                                                               int doc_height,
 246                                                               int target_width,
 247                                                               int target_height,
 248                                                               int vsb_width);
 249 static double   zoom_for_size_fit_height                     (int doc_width,
 250                                                               int doc_height,
 251                                                               int target_width,
 252                                                               int target_height,
 253                                                               int vsb_height);
 254 static double   zoom_for_size_best_fit                       (int doc_width,
 255                                                               int doc_height,
 256                                                               int target_width,
 257                                                               int target_height,
 258                                                               int vsb_width,
 259                                                               int hsb_width);
 260 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 261                                                               int     width,
 262                                                               int     height);
 263 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 264                                                                 int     width,
 265                                                                 int     height,
 266                                                                 int     vsb_width,
 267                                                                 int     hsb_height);
 268 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 269                                                                 int     width,
 270                                                                 int     height,
 271                                                                 int     vsb_width,
 272                                                                 int     hsb_height);
 273 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 274                                                                 int     width,
 275                                                                 int     height,
 276                                                                 int     vsb_width,
 277                                                                 int     hsb_height);
 278 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 279                                                                 int     width,
 280                                                                 int     height,
 281                                                                 int     vsb_width,
 282                                                                 int     hsb_height);
 283 /*** Cursors ***/
 284 static GdkCursor* ev_view_create_invisible_cursor            (void);
 285 static void       ev_view_set_cursor                         (EvView             *view,
 286                                                               EvViewCursor        new_cursor);
 287 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 288                                                               gint x,
 289                                                               gint y);
 290
 291 /*** Find ***/
 292 static gint         ev_view_find_get_n_results               (EvView             *view,
 293                                                               gint                page);
 294 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 295                                                               gint                page,
 296                                                               gint                result);
 297 static void       jump_to_find_result                        (EvView             *view);
 298 static void       jump_to_find_page                          (EvView             *view,
 299                                                               EvViewFindDirection direction,
 300                                                               gint                shift);
 301
 302 /*** Selection ***/
 303 static void       compute_selections                         (EvView             *view,
 304                                                               EvSelectionStyle    style,
 305                                                               GdkPoint           *start,
 306                                                               GdkPoint           *stop);
 307 static void       clear_selection                            (EvView             *view);
 308 static void       clear_link_selected                        (EvView             *view);
 309 static void       selection_free                             (EvViewSelection    *selection);
 310 static char*      get_selected_text                          (EvView             *ev_view);
 311 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 312                                                               GtkSelectionData   *selection_data,
 313                                                               guint               info,
 314                                                               gpointer            data);
 315 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 316                                                               gpointer            data);
 317 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 318
 319 /*** Presentation ***/
 320 static void       ev_view_presentation_transition_start      (EvView             *ev_view);
 321 static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
 322
 323
 324 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 325
 326 static void
 327 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 328 {
 329         GdkPoint view_point;
 330
 331         if (view->document == NULL) {
 332                 return;
 333         }
 334
 335         doc_point_to_view_point (view, view->current_page, &view->pending_point, &view_point);
 336
 337         if (orientation == GTK_ORIENTATION_VERTICAL) {
 338                 view->pending_point.y = 0;
 339         } else {
 340                 view->pending_point.x = 0;
 341         }
 342
 343         if (orientation == GTK_ORIENTATION_VERTICAL) {
 344                 if (view->continuous) {
 345                         gtk_adjustment_clamp_page (view->vadjustment,
 346                                                    view_point.y - view->spacing / 2,
 347                                                    view_point.y + view->vadjustment->page_size);
 348                 } else {
 349                         gtk_adjustment_set_value (view->vadjustment,
 350                                                   CLAMP (view_point.y,
 351                                                   view->vadjustment->lower,
 352                                                   view->vadjustment->upper -
 353                                                   view->vadjustment->page_size));
 354                 }
 355         } else {
 356                 if (view->dual_page) {
 357                         gtk_adjustment_clamp_page (view->hadjustment,
 358                                                    view_point.x,
 359                                                    view_point.x + view->hadjustment->page_size);
 360                 } else {
 361                         gtk_adjustment_set_value (view->hadjustment,
 362                                                   CLAMP (view_point.x,
 363                                                   view->hadjustment->lower,
 364                                                   view->hadjustment->upper -
 365                                                   view->hadjustment->page_size));
 366                 }
 367         }
 368 }
 369
 370 static void
 371 view_set_adjustment_values (EvView         *view,
 372                             GtkOrientation  orientation)
 373 {
 374         GtkWidget *widget = GTK_WIDGET (view);
 375         GtkAdjustment *adjustment;
 376         int requisition;
 377         int allocation;
 378
 379         double factor;
 380         gint new_value;
 381
 382         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 383                 requisition = widget->requisition.width;
 384                 allocation = widget->allocation.width;
 385                 adjustment = view->hadjustment;
 386         } else {
 387                 requisition = widget->requisition.height;
 388                 allocation = widget->allocation.height;
 389                 adjustment = view->vadjustment;
 390         }
 391
 392         if (!adjustment)
 393                 return;
 394
 395         factor = 1.0;
 396         switch (view->pending_scroll) {
 397                 case SCROLL_TO_KEEP_POSITION:
 398                 case SCROLL_TO_FIND_LOCATION:
 399                         factor = (adjustment->value) / adjustment->upper;
 400                         break;
 401                 case SCROLL_TO_PAGE_POSITION:
 402                         break;
 403                 case SCROLL_TO_CENTER:
 404                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 405                         break;
 406         }
 407
 408         adjustment->page_size = allocation;
 409         adjustment->step_increment = allocation * 0.1;
 410         adjustment->page_increment = allocation * 0.9;
 411         adjustment->lower = 0;
 412         adjustment->upper = MAX (allocation, requisition);
 413
 414         /*
 415          * We add 0.5 to the values before to average out our rounding errors.
 416          */
 417         switch (view->pending_scroll) {
 418                 case SCROLL_TO_KEEP_POSITION:
 419                 case SCROLL_TO_FIND_LOCATION:
 420                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 421                         gtk_adjustment_set_value (adjustment, (int)new_value);
 422                         break;
 423                 case SCROLL_TO_PAGE_POSITION:
 424                         scroll_to_current_page (view, orientation);
 425                         break;
 426                 case SCROLL_TO_CENTER:
 427                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 428                                            0, adjustment->upper - adjustment->page_size);
 429                         gtk_adjustment_set_value (adjustment, (int)new_value);
 430                         break;
 431         }
 432
 433         gtk_adjustment_changed (adjustment);
 434 }
 435
 436 static void
 437 view_update_range_and_current_page (EvView *view)
 438 {
 439         gint current_page;
 440         gint best_current_page = -1;
 441         gint start = view->start_page;
 442         gint end = view->end_page;
 443
 444         /* Presentation trumps all other modes */
 445         if (view->presentation) {
 446                 view->start_page = view->current_page;
 447                 view->end_page = view->current_page;
 448         } else if (view->continuous) {
 449                 GdkRectangle current_area, unused, page_area;
 450                 GtkBorder border;
 451                 gboolean found = FALSE;
 452                 gint area_max = -1, area;
 453                 int i;
 454
 455                 if (!(view->vadjustment && view->hadjustment))
 456                         return;
 457
 458                 current_area.x = view->hadjustment->value;
 459                 current_area.width = view->hadjustment->upper;
 460                 current_area.y = view->vadjustment->value;
 461                 current_area.height = view->vadjustment->page_size;
 462
 463                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 464
 465                         get_page_extents (view, i, &page_area, &border);
 466
 467                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 468                                 area = unused.width * unused.height;
 469
 470                                 if (!found) {
 471                                         area_max = area;
 472                                         view->start_page = i;
 473                                         found = TRUE;
 474                                         best_current_page = i;
 475                                 }
 476                                 if (area > area_max) {
 477                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 478                                         area_max = area;
 479                                 }
 480
 481                                 view->end_page = i;
 482                         } else if (found && view->current_page <= view->end_page) {
 483                                 break;
 484                         }
 485                 }
 486
 487         } else if (view->dual_page) {
 488                 if (view->current_page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) {
 489                         view->start_page = view->current_page;
 490                         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 491                                 view->end_page = view->start_page + 1;
 492                         else
 493                                 view->end_page = view->start_page;
 494                 } else {
 495                         if (view->current_page < 1)
 496                                 view->start_page = view->current_page;
 497                         else
 498                                 view->start_page = view->current_page - 1;
 499                         view->end_page = view->current_page;
 500                 }
 501         } else {
 502                 view->start_page = view->current_page;
 503                 view->end_page = view->current_page;
 504         }
 505
 506         best_current_page = MAX (best_current_page, view->start_page);
 507         current_page = ev_page_cache_get_current_page (view->page_cache);
 508
 509         if ((current_page != best_current_page) && (view->pending_scroll == SCROLL_TO_KEEP_POSITION)) {
 510                 view->current_page = best_current_page;
 511                 ev_page_cache_set_current_page (view->page_cache, best_current_page);
 512         }
 513
 514         if (start != view->start_page || end != view->end_page) {
 515                 gint i;
 516
 517                 for (i = start; i < view->start_page; i++) {
 518                         hide_annotation_windows (view, i);
 519                 }
 520
 521                 for (i = end; i > view->end_page; i--) {
 522                         hide_annotation_windows (view, i);
 523                 }
 524         }
 525
 526         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 527                                         view->start_page,
 528                                         view->end_page,
 529                                         view->rotation,
 530                                         view->scale,
 531                                         view->selection_info.selections);
 532 }
 533
 534 static void
 535 set_scroll_adjustment (EvView *view,
 536                        GtkOrientation  orientation,
 537                        GtkAdjustment  *adjustment)
 538 {
 539         GtkAdjustment **to_set;
 540
 541         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 542                 to_set = &view->hadjustment;
 543         else
 544                 to_set = &view->vadjustment;
 545
 546         if (*to_set != adjustment) {
 547                 if (*to_set) {
 548                         g_signal_handlers_disconnect_by_func (*to_set,
 549                                                               (gpointer) on_adjustment_value_changed,
 550                                                               view);
 551                         g_object_unref (*to_set);
 552                 }
 553
 554                 *to_set = adjustment;
 555                 view_set_adjustment_values (view, orientation);
 556
 557                 if (*to_set) {
 558                         g_object_ref (*to_set);
 559                         g_signal_connect (*to_set, "value_changed",
 560                                           G_CALLBACK (on_adjustment_value_changed), view);
 561                 }
 562         }
 563 }
 564
 565 static void
 566 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 567                                 GtkAdjustment  *hadjustment,
 568                                 GtkAdjustment  *vadjustment)
 569 {
 570         EvView *view = EV_VIEW (layout);
 571
 572         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 573         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 574
 575         on_adjustment_value_changed (NULL, view);
 576 }
 577
 578 static void
 579 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 580                            guint           keyval,
 581                            GdkModifierType modifiers,
 582                            GtkScrollType   scroll,
 583                            gboolean        horizontal)
 584 {
 585   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 586
 587   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 588                                 "binding_activated", 2,
 589                                 GTK_TYPE_SCROLL_TYPE, scroll,
 590                                 G_TYPE_BOOLEAN, horizontal);
 591   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 592                                 "binding_activated", 2,
 593                                 GTK_TYPE_SCROLL_TYPE, scroll,
 594                                 G_TYPE_BOOLEAN, horizontal);
 595 }
 596
 597 void
 598 ev_view_scroll (EvView        *view,
 599                 GtkScrollType  scroll,
 600                 gboolean       horizontal)
 601 {
 602         GtkAdjustment *adjustment;
 603         double value, increment;
 604         gboolean first_page = FALSE;
 605         gboolean last_page = FALSE;
 606
 607         view->jump_to_find_result = FALSE;
 608
 609         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 610                 switch (scroll) {
 611                         case GTK_SCROLL_PAGE_BACKWARD:
 612                         case GTK_SCROLL_STEP_BACKWARD:
 613                                 ev_view_previous_page (view);
 614                                 break;
 615                         case GTK_SCROLL_PAGE_FORWARD:
 616                         case GTK_SCROLL_STEP_FORWARD:
 617                                 ev_view_next_page (view);
 618                                 break;
 619                         default:
 620                                 break;
 621                 }
 622                 return;
 623         }
 624
 625         /* Assign values for increment and vertical adjustment */
 626         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 627         increment = adjustment->page_size * 0.75;
 628         value = adjustment->value;
 629
 630         /* Assign boolean for first and last page */
 631         if (view->current_page == 0)
 632                 first_page = TRUE;
 633         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 634                 last_page = TRUE;
 635
 636         switch (scroll) {
 637                 case GTK_SCROLL_PAGE_BACKWARD:
 638                         /* Do not jump backwards if at the first page */
 639                         if (value == (adjustment->lower) && first_page) {
 640                                 /* Do nothing */
 641                                 /* At the top of a page, assign the upper bound limit of previous page */
 642                         } else if (value == (adjustment->lower)) {
 643                                 value = adjustment->upper - adjustment->page_size;
 644                                 ev_view_previous_page (view);
 645                                 /* Jump to the top */
 646                         } else {
 647                                 value = MAX (value - increment, adjustment->lower);
 648                         }
 649                         break;
 650                 case GTK_SCROLL_PAGE_FORWARD:
 651                         /* Do not jump forward if at the last page */
 652                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 653                                 /* Do nothing */
 654                         /* At the bottom of a page, assign the lower bound limit of next page */
 655                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 656                                 value = 0;
 657                                 ev_view_next_page (view);
 658                         /* Jump to the bottom */
 659                         } else {
 660                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 661                         }
 662                         break;
 663                 case GTK_SCROLL_STEP_BACKWARD:
 664                         value -= adjustment->step_increment;
 665                         break;
 666                 case GTK_SCROLL_STEP_FORWARD:
 667                         value += adjustment->step_increment;
 668                         break;
 669                 case GTK_SCROLL_STEP_DOWN:
 670                         value -= adjustment->step_increment / 10;
 671                         break;
 672                 case GTK_SCROLL_STEP_UP:
 673                         value += adjustment->step_increment / 10;
 674                         break;
 675                 default:
 676                         break;
 677         }
 678
 679         value = CLAMP (value, adjustment->lower,
 680                        adjustment->upper - adjustment->page_size);
 681
 682         gtk_adjustment_set_value (adjustment, value);
 683 }
 684
 685 #define MARGIN 5
 686
 687 static void
 688 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 689 {
 690         GtkWidget *widget = GTK_WIDGET (view);
 691         GtkAdjustment *adjustment;
 692         int value;
 693
 694         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 695
 696         adjustment = view->vadjustment;
 697
 698         if (rect->y < adjustment->value) {
 699                 value = MAX (adjustment->lower, rect->y - MARGIN);
 700                 gtk_adjustment_set_value (view->vadjustment, value);
 701         } else if (rect->y + rect->height >
 702                    adjustment->value + widget->allocation.height) {
 703                 value = MIN (adjustment->upper, rect->y + rect->height -
 704                              widget->allocation.height + MARGIN);
 705                 gtk_adjustment_set_value (view->vadjustment, value);
 706         }
 707
 708         adjustment = view->hadjustment;
 709
 710         if (rect->x < adjustment->value) {
 711                 value = MAX (adjustment->lower, rect->x - MARGIN);
 712                 gtk_adjustment_set_value (view->hadjustment, value);
 713         } else if (rect->x + rect->height >
 714                    adjustment->value + widget->allocation.width) {
 715                 value = MIN (adjustment->upper, rect->x + rect->width -
 716                              widget->allocation.width + MARGIN);
 717                 gtk_adjustment_set_value (view->hadjustment, value);
 718         }
 719
 720         gtk_widget_queue_resize (GTK_WIDGET (view));
 721 }
 722
 723 /*** Geometry computations ***/
 724
 725 static void
 726 compute_border (EvView *view, int width, int height, GtkBorder *border)
 727 {
 728         if (view->presentation) {
 729                 border->left = 0;
 730                 border->right = 0;
 731                 border->top = 0;
 732                 border->bottom = 0;
 733         } else {
 734                 ev_document_misc_get_page_border_size (width, height, border);
 735         }
 736 }
 737
 738 static void
 739 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 740 {
 741         int max_width, offset;
 742         GtkBorder border;
 743
 744         g_return_if_fail (y_offset != NULL);
 745
 746         ev_page_cache_get_max_width (view->page_cache, view->rotation, zoom, &max_width);
 747
 748         compute_border (view, max_width, max_width, &border);
 749
 750         if (view->dual_page) {
 751                 ev_page_cache_get_height_to_page (view->page_cache, page,
 752                                                   view->rotation, zoom, NULL, &offset);
 753                 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);
 754         } else {
 755                 ev_page_cache_get_height_to_page (view->page_cache, page,
 756                                                   view->rotation, zoom, &offset, NULL);
 757                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 758         }
 759
 760         *y_offset = offset;
 761         return;
 762 }
 763
 764 static gboolean
 765 get_page_extents (EvView       *view,
 766                   gint          page,
 767                   GdkRectangle *page_area,
 768                   GtkBorder    *border)
 769 {
 770         GtkWidget *widget;
 771         int width, height;
 772
 773         widget = GTK_WIDGET (view);
 774
 775         /* Get the size of the page */
 776         ev_page_cache_get_size (view->page_cache, page,
 777                                 view->rotation,
 778                                 view->scale,
 779                                 &width, &height);
 780         compute_border (view, width, height, border);
 781         page_area->width = width + border->left + border->right;
 782         page_area->height = height + border->top + border->bottom;
 783
 784         if (view->presentation) {
 785                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 786                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 787         } else if (view->continuous) {
 788                 gint max_width;
 789                 gint x, y;
 790
 791                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 792                                              view->scale, &max_width);
 793                 max_width = max_width + border->left + border->right;
 794                 /* Get the location of the bounding box */
 795                 if (view->dual_page) {
 796                         x = view->spacing + ((page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? 0 : 1) * (max_width + view->spacing);
 797                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 798                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 799                                 x = x + (max_width - width - border->left - border->right);
 800                 } else {
 801                         x = view->spacing;
 802                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 803                 }
 804
 805                 get_page_y_offset (view, page, view->scale, &y);
 806
 807                 page_area->x = x;
 808                 page_area->y = y;
 809         } else {
 810                 gint x, y;
 811                 if (view->dual_page) {
 812                         gint width_2, height_2;
 813                         gint max_width = width;
 814                         gint max_height = height;
 815                         GtkBorder overall_border;
 816                         gint other_page;
 817
 818                         other_page = (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? page + 1: page - 1;
 819
 820                         /* First, we get the bounding box of the two pages */
 821                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)
 822                             && (0 <= other_page)) {
 823                                 ev_page_cache_get_size (view->page_cache,
 824                                                         other_page,
 825                                                         view->rotation,
 826                                                         view->scale,
 827                                                         &width_2, &height_2);
 828                                 if (width_2 > width)
 829                                         max_width = width_2;
 830                                 if (height_2 > height)
 831                                         max_height = height_2;
 832                         }
 833                         compute_border (view, max_width, max_height, &overall_border);
 834
 835                         /* Find the offsets */
 836                         x = view->spacing;
 837                         y = view->spacing;
 838
 839                         /* Adjust for being the left or right page */
 840                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 841                                 x = x + max_width - width;
 842                         else
 843                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 844
 845                         y = y + (max_height - height)/2;
 846
 847                         /* Adjust for extra allocation */
 848                         x = x + MAX (0, widget->allocation.width -
 849                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 850                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 851                 } else {
 852                         x = view->spacing;
 853                         y = view->spacing;
 854
 855                         /* Adjust for extra allocation */
 856                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 857                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 858                 }
 859
 860                 page_area->x = x;
 861                 page_area->y = y;
 862         }
 863
 864         return TRUE;
 865 }
 866
 867 static void
 868 view_point_to_doc_point (EvView *view,
 869                          GdkPoint *view_point,
 870                          GdkRectangle *page_area,
 871                          double  *doc_point_x,
 872                          double  *doc_point_y)
 873 {
 874         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 875         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 876 }
 877
 878 static void
 879 view_rect_to_doc_rect (EvView *view,
 880                        GdkRectangle *view_rect,
 881                        GdkRectangle *page_area,
 882                        EvRectangle  *doc_rect)
 883 {
 884         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 885         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 886         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 887         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 888 }
 889
 890 static gboolean
 891 doc_point_to_view_point (EvView       *view,
 892                          int           page,
 893                          EvPoint      *doc_point,
 894                          GdkPoint     *view_point)
 895 {
 896         GdkRectangle page_area;
 897         GtkBorder border;
 898         double x, y, view_x, view_y;
 899         int width, height;
 900
 901         ev_page_cache_get_size (view->page_cache, page,
 902                                 view->rotation,
 903                                 1.0,
 904                                 &width, &height);
 905
 906         if (view->rotation == 0) {
 907                 x = doc_point->x;
 908                 y = doc_point->y;
 909         } else if (view->rotation == 90) {
 910                 x = width - doc_point->y;
 911                 y = doc_point->x;
 912         } else if (view->rotation == 180) {
 913                 x = width - doc_point->x;
 914                 y = height - doc_point->y;
 915         } else if (view->rotation == 270) {
 916                 x = doc_point->y;
 917                 y = height - doc_point->x;
 918         } else {
 919                 g_assert_not_reached ();
 920         }
 921
 922         get_page_extents (view, page, &page_area, &border);
 923
 924         view_x = x * view->scale;
 925         view_y = y * view->scale;
 926         view_point->x = view_x + page_area.x;
 927         view_point->y = view_y + page_area.y;
 928
 929         return (view_x > 0 && view_x <= page_area.width &&
 930                 view_y > 0 && view_y <= page_area.height);
 931 }
 932
 933 static void
 934 doc_rect_to_view_rect (EvView       *view,
 935                        int           page,
 936                        EvRectangle  *doc_rect,
 937                        GdkRectangle *view_rect)
 938 {
 939         GdkRectangle page_area;
 940         GtkBorder border;
 941         double x, y, w, h;
 942         int width, height;
 943
 944         ev_page_cache_get_size (view->page_cache, page,
 945                                 view->rotation,
 946                                 1.0,
 947                                 &width, &height);
 948
 949         if (view->rotation == 0) {
 950                 x = doc_rect->x1;
 951                 y = doc_rect->y1;
 952                 w = doc_rect->x2 - doc_rect->x1;
 953                 h = doc_rect->y2 - doc_rect->y1;
 954         } else if (view->rotation == 90) {
 955                 x = width - doc_rect->y2;
 956                 y = doc_rect->x1;
 957                 w = doc_rect->y2 - doc_rect->y1;
 958                 h = doc_rect->x2 - doc_rect->x1;
 959         } else if (view->rotation == 180) {
 960                 x = width - doc_rect->x2;
 961                 y = height - doc_rect->y2;
 962                 w = doc_rect->x2 - doc_rect->x1;
 963                 h = doc_rect->y2 - doc_rect->y1;
 964         } else if (view->rotation == 270) {
 965                 x = doc_rect->y1;
 966                 y = height - doc_rect->x2;
 967                 w = doc_rect->y2 - doc_rect->y1;
 968                 h = doc_rect->x2 - doc_rect->x1;
 969         } else {
 970                 g_assert_not_reached ();
 971         }
 972
 973         get_page_extents (view, page, &page_area, &border);
 974
 975         view_rect->x = x * view->scale + page_area.x;
 976         view_rect->y = y * view->scale + page_area.y;
 977         view_rect->width = w * view->scale;
 978         view_rect->height = h * view->scale;
 979 }
 980
 981 static void
 982 find_page_at_location (EvView  *view,
 983                        gdouble  x,
 984                        gdouble  y,
 985                        gint    *page,
 986                        gint    *x_offset,
 987                        gint    *y_offset)
 988 {
 989         int i;
 990
 991         if (view->document == NULL)
 992                 return;
 993
 994         g_assert (page);
 995         g_assert (x_offset);
 996         g_assert (y_offset);
 997
 998         for (i = view->start_page; i <= view->end_page; i++) {
 999                 GdkRectangle page_area;
1000                 GtkBorder border;
1001
1002                 if (! get_page_extents (view, i, &page_area, &border))
1003                         continue;
1004
1005                 if ((x >= page_area.x + border.left) &&
1006                     (x < page_area.x + page_area.width - border.right) &&
1007                     (y >= page_area.y + border.top) &&
1008                     (y < page_area.y + page_area.height - border.bottom)) {
1009                         *page = i;
1010                         *x_offset = x - (page_area.x + border.left);
1011                         *y_offset = y - (page_area.y + border.top);
1012                         return;
1013                 }
1014         }
1015
1016         *page = -1;
1017 }
1018
1019 static gboolean
1020 location_in_text (EvView  *view,
1021                   gdouble  x,
1022                   gdouble  y)
1023 {
1024         GdkRegion *region;
1025         gint page = -1;
1026         gint x_offset = 0, y_offset = 0;
1027
1028         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1029
1030         if (page == -1)
1031                 return FALSE;
1032
1033         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1034
1035         if (region)
1036                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1037         else
1038                 return FALSE;
1039 }
1040
1041 static int
1042 ev_view_get_width (EvView *view)
1043 {
1044         return GTK_WIDGET (view)->allocation.width;
1045 }
1046
1047 static int
1048 ev_view_get_height (EvView *view)
1049 {
1050         return GTK_WIDGET (view)->allocation.height;
1051 }
1052
1053 static gboolean
1054 location_in_selected_text (EvView  *view,
1055                            gdouble  x,
1056                            gdouble  y)
1057 {
1058         gint page = -1;
1059         gint x_offset = 0, y_offset = 0;
1060         EvViewSelection *selection;
1061         GList *l = NULL;
1062
1063         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1064                 selection = (EvViewSelection *)l->data;
1065
1066                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1067
1068                 if (page != selection->page)
1069                         continue;
1070
1071                 if (selection->covered_region &&
1072                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1073                         return TRUE;
1074         }
1075
1076         return FALSE;
1077 }
1078
1079 static gboolean
1080 get_doc_point_from_offset (EvView *view,
1081                            gint    page,
1082                            gint    x_offset,
1083                            gint    y_offset,
1084                            gint   *x_new,
1085                            gint   *y_new)
1086 {
1087         int width, height;
1088         double x, y;
1089
1090         ev_page_cache_get_size (view->page_cache, page,
1091                                 view->rotation,
1092                                 1.0,
1093                                 &width, &height);
1094
1095         x_offset = x_offset / view->scale;
1096         y_offset = y_offset / view->scale;
1097
1098         if (view->rotation == 0) {
1099                 x = x_offset;
1100                 y = y_offset;
1101         } else if (view->rotation == 90) {
1102                 x = y_offset;
1103                 y = width - x_offset;
1104         } else if (view->rotation == 180) {
1105                 x = width - x_offset;
1106                 y = height - y_offset;
1107         } else if (view->rotation == 270) {
1108                 x = height - y_offset;
1109                 y = x_offset;
1110         } else {
1111                 g_assert_not_reached ();
1112         }
1113
1114         *x_new = x;
1115         *y_new = y;
1116
1117         return TRUE;
1118 }
1119
1120 static gboolean
1121 get_doc_point_from_location (EvView  *view,
1122                              gdouble  x,
1123                              gdouble  y,
1124                              gint    *page,
1125                              gint    *x_new,
1126                              gint    *y_new)
1127 {
1128         gint x_offset = 0, y_offset = 0;
1129
1130         x += view->scroll_x;
1131         y += view->scroll_y;
1132         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1133         if (*page == -1)
1134                 return FALSE;
1135
1136         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1137 }
1138
1139 /*** Hyperref ***/
1140 static EvLink *
1141 ev_view_get_link_at_location (EvView  *view,
1142                               gdouble  x,
1143                               gdouble  y)
1144 {
1145         gint page = -1;
1146         gint x_new = 0, y_new = 0;
1147         GList *link_mapping;
1148
1149         if (!EV_IS_DOCUMENT_LINKS (view->document))
1150                 return NULL;
1151
1152         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1153                 return NULL;
1154
1155         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1156
1157         if (link_mapping)
1158                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1159         else
1160                 return NULL;
1161 }
1162
1163 static void
1164 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1165 {
1166         EvPoint doc_point;
1167         gdouble zoom, left, top;
1168         gboolean change_left, change_top;
1169
1170         left = ev_link_dest_get_left (dest, &change_left);
1171         top = ev_link_dest_get_top (dest, &change_top);
1172
1173         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1174                                        ev_link_dest_get_bottom (dest) - top,
1175                                        ev_view_get_width (view),
1176                                        ev_view_get_height (view), 0, 0);
1177
1178         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1179         ev_view_set_zoom (view, zoom, FALSE);
1180
1181         doc_point.x = change_left ? left : 0;
1182         doc_point.y = change_top ? top : 0;
1183
1184         view->current_page = ev_link_dest_get_page (dest);
1185         if (change_left || change_top)
1186                 view->pending_point = doc_point;
1187         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1188
1189         gtk_widget_queue_resize (GTK_WIDGET (view));
1190 }
1191
1192 static void
1193 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1194 {
1195         EvPoint doc_point;
1196         int doc_width, doc_height, page;
1197         double zoom, left;
1198         gboolean change_left;
1199
1200         page = ev_link_dest_get_page (dest);
1201         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1202
1203         left = ev_link_dest_get_left (dest, &change_left);
1204         doc_point.x = change_left ? left : 0;
1205         doc_point.y = 0;
1206
1207         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1208                                          ev_view_get_width (view),
1209                                          ev_view_get_height (view), 0);
1210
1211         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1212         ev_view_set_zoom (view, zoom, FALSE);
1213
1214         view->current_page = page;
1215         if (change_left)
1216                 view->pending_point = doc_point;
1217         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1218
1219         gtk_widget_queue_resize (GTK_WIDGET (view));
1220 }
1221
1222 static void
1223 goto_fith_dest (EvView *view, EvLinkDest *dest)
1224 {
1225         EvPoint doc_point;
1226         int doc_width, doc_height, page;
1227         gdouble zoom, top;
1228         gboolean change_top;
1229
1230         page = ev_link_dest_get_page (dest);
1231         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1232
1233         top = ev_link_dest_get_top (dest, &change_top);
1234
1235         doc_point.x = 0;
1236         doc_point.y = change_top ? top : 0;
1237
1238         zoom = zoom_for_size_fit_width (doc_width, top,
1239                                         ev_view_get_width (view),
1240                                         ev_view_get_height (view), 0);
1241
1242         ev_view_set_sizing_mode (view, EV_SIZING_FIT_WIDTH);
1243         ev_view_set_zoom (view, zoom, FALSE);
1244
1245         view->current_page = page;
1246         if (change_top)
1247                 view->pending_point = doc_point;
1248         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1249
1250         gtk_widget_queue_resize (GTK_WIDGET (view));
1251 }
1252
1253 static void
1254 goto_fit_dest (EvView *view, EvLinkDest *dest)
1255 {
1256         double zoom;
1257         int doc_width, doc_height;
1258         int page;
1259
1260         page = ev_link_dest_get_page (dest);
1261         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1262
1263         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1264                                        ev_view_get_height (view), 0, 0);
1265
1266         ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
1267         ev_view_set_zoom (view, zoom, FALSE);
1268
1269         view->current_page = page;
1270         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1271
1272         gtk_widget_queue_resize (GTK_WIDGET (view));
1273 }
1274
1275 static void
1276 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1277 {
1278         EvPoint doc_point;
1279         gint page;
1280         gdouble zoom, left, top;
1281         gboolean change_zoom, change_left, change_top;
1282
1283         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1284         page = ev_link_dest_get_page (dest);
1285
1286         if (change_zoom && zoom > 1) {
1287                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1288                 ev_view_set_zoom (view, zoom, FALSE);
1289         }
1290
1291         left = ev_link_dest_get_left (dest, &change_left);
1292         top = ev_link_dest_get_top (dest, &change_top);
1293
1294         doc_point.x = change_left ? left : 0;
1295         doc_point.y = change_top ? top : 0;
1296
1297         view->current_page = page;
1298         if (change_left || change_top)
1299                 view->pending_point = doc_point;
1300         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1301
1302         gtk_widget_queue_resize (GTK_WIDGET (view));
1303 }
1304
1305 static void
1306 goto_dest (EvView *view, EvLinkDest *dest)
1307 {
1308         EvLinkDestType type;
1309         int page, n_pages, current_page;
1310
1311         page = ev_link_dest_get_page (dest);
1312         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1313
1314         if (page < 0 || page >= n_pages)
1315                 return;
1316
1317         current_page = view->current_page;
1318
1319         type = ev_link_dest_get_dest_type (dest);
1320
1321         switch (type) {
1322                 case EV_LINK_DEST_TYPE_PAGE:
1323                         ev_page_cache_set_current_page (view->page_cache, page);
1324                         break;
1325                 case EV_LINK_DEST_TYPE_FIT:
1326                         goto_fit_dest (view, dest);
1327                         break;
1328                 case EV_LINK_DEST_TYPE_FITH:
1329                         goto_fith_dest (view, dest);
1330                         break;
1331                 case EV_LINK_DEST_TYPE_FITV:
1332                         goto_fitv_dest (view, dest);
1333                         break;
1334                 case EV_LINK_DEST_TYPE_FITR:
1335                         goto_fitr_dest (view, dest);
1336                         break;
1337                 case EV_LINK_DEST_TYPE_XYZ:
1338                         goto_xyz_dest (view, dest);
1339                         break;
1340                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1341                         ev_page_cache_set_page_label (view->page_cache, ev_link_dest_get_page_label (dest));
1342                         break;
1343                 default:
1344                         g_assert_not_reached ();
1345         }
1346
1347         if (current_page != view->current_page)
1348                 ev_page_cache_set_current_page (view->page_cache,
1349                                                 view->current_page);
1350 }
1351
1352 static void
1353 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1354 {
1355         EvLinkDestType type;
1356
1357         type = ev_link_dest_get_dest_type (dest);
1358
1359         if (type == EV_LINK_DEST_TYPE_NAMED) {
1360                 EvLinkDest  *dest2;
1361                 const gchar *named_dest;
1362
1363                 named_dest = ev_link_dest_get_named_dest (dest);
1364                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1365                                                           named_dest);
1366                 if (dest2) {
1367                         goto_dest (view, dest2);
1368                         g_object_unref (dest2);
1369                 }
1370
1371                 return;
1372         }
1373
1374         goto_dest (view, dest);
1375 }
1376
1377 void
1378 ev_view_handle_link (EvView *view, EvLink *link)
1379 {
1380         EvLinkAction    *action = NULL;
1381         EvLinkActionType type;
1382
1383         action = ev_link_get_action (link);
1384         if (!action)
1385                 return;
1386
1387         type = ev_link_action_get_action_type (action);
1388
1389         switch (type) {
1390                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1391                         EvLinkDest *dest;
1392
1393                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1394
1395                         dest = ev_link_action_get_dest (action);
1396                         ev_view_goto_dest (view, dest);
1397                 }
1398                         break;
1399                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1400                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1401                 case EV_LINK_ACTION_TYPE_LAUNCH:
1402                 case EV_LINK_ACTION_TYPE_NAMED:
1403                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1404                         break;
1405         }
1406 }
1407
1408 gchar *
1409 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1410 {
1411         EvLinkDestType type;
1412         gchar *msg = NULL;
1413
1414         type = ev_link_dest_get_dest_type (dest);
1415
1416         switch (type) {
1417                 case EV_LINK_DEST_TYPE_NAMED: {
1418                         EvLinkDest  *dest2;
1419                         const gchar *named_dest;
1420
1421                         named_dest = ev_link_dest_get_named_dest (dest);
1422                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1423                                                                   named_dest);
1424                         if (dest2) {
1425                                 msg = ev_page_cache_get_page_label (view->page_cache,
1426                                                                     ev_link_dest_get_page (dest2));
1427                                 g_object_unref (dest2);
1428                         }
1429                 }
1430
1431                         break;
1432                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1433                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1434                 }
1435                         break;
1436                 default:
1437                         msg = ev_page_cache_get_page_label (view->page_cache,
1438                                                             ev_link_dest_get_page (dest));
1439         }
1440
1441         return msg;
1442 }
1443
1444 static char *
1445 tip_from_action_named (EvLinkAction *action)
1446 {
1447         const gchar *name = ev_link_action_get_name (action);
1448
1449         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1450                 return g_strdup (_("Go to first page"));
1451         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1452                 return g_strdup (_("Go to previous page"));
1453         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1454                 return g_strdup (_("Go to next page"));
1455         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1456                 return g_strdup (_("Go to last page"));
1457         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1458                 return g_strdup (_("Go to page"));
1459         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1460                 return g_strdup (_("Find"));
1461         }
1462
1463         return NULL;
1464 }
1465
1466 static char *
1467 tip_from_link (EvView *view, EvLink *link)
1468 {
1469         EvLinkAction *action;
1470         EvLinkActionType type;
1471         char *msg = NULL;
1472         char *page_label;
1473         const char *title;
1474
1475         action = ev_link_get_action (link);
1476         title = ev_link_get_title (link);
1477
1478         if (!action)
1479                 return title ? g_strdup (title) : NULL;
1480
1481         type = ev_link_action_get_action_type (action);
1482
1483         switch (type) {
1484                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1485                         page_label = ev_view_page_label_from_dest (view,
1486                                                                    ev_link_action_get_dest (action));
1487                         if (page_label) {
1488                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1489                                 g_free (page_label);
1490                         }
1491                         break;
1492                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1493                         if (title) {
1494                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1495                                                        ev_link_action_get_filename (action));
1496                         } else {
1497                                 msg = g_strdup_printf (_("Go to file “%s”"),
1498                                                        ev_link_action_get_filename (action));
1499                         }
1500                         break;
1501                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1502                         msg = g_strdup (ev_link_action_get_uri (action));
1503                         break;
1504                 case EV_LINK_ACTION_TYPE_LAUNCH:
1505                         msg = g_strdup_printf (_("Launch %s"),
1506                                                ev_link_action_get_filename (action));
1507                         break;
1508                 case EV_LINK_ACTION_TYPE_NAMED:
1509                         msg = tip_from_action_named (action);
1510                         break;
1511                 default:
1512                         if (title)
1513                                 msg = g_strdup (title);
1514                         break;
1515         }
1516
1517         return msg;
1518 }
1519
1520 static void
1521 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1522 {
1523         EvLink       *link;
1524         EvFormField  *field;
1525         EvAnnotation *annot = NULL;
1526
1527         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1528                 return;
1529
1530         if (view->drag_info.in_drag) {
1531                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1532                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1533                 return;
1534         }
1535
1536         if (view->scroll_info.autoscrolling) {
1537                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1538                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1539                 return;
1540         }
1541
1542         link = ev_view_get_link_at_location (view, x, y);
1543         if (link) {
1544                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1545         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1546                 if (field->is_read_only) {
1547                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1548                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1549                             view->cursor == EV_VIEW_CURSOR_DRAG)
1550                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1551                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1552                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1553                 } else {
1554                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1555                 }
1556         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1557                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1558         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1559                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1560         } else {
1561                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1562                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1563                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1564                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1565                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1566         }
1567
1568         if (link || annot)
1569                 g_object_set (view, "has-tooltip", TRUE, NULL);
1570 }
1571
1572 /*** Images ***/
1573 static EvImage *
1574 ev_view_get_image_at_location (EvView  *view,
1575                                gdouble  x,
1576                                gdouble  y)
1577 {
1578         gint page = -1;
1579         gint x_new = 0, y_new = 0;
1580         GList *image_mapping;
1581
1582         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1583                 return NULL;
1584
1585         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1586                 return NULL;
1587
1588         image_mapping = ev_pixbuf_cache_get_image_mapping (view->pixbuf_cache, page);
1589
1590         if (image_mapping)
1591                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1592         else
1593                 return NULL;
1594 }
1595
1596 /*** Forms ***/
1597 static EvFormField *
1598 ev_view_get_form_field_at_location (EvView  *view,
1599                                     gdouble  x,
1600                                     gdouble  y)
1601 {
1602         gint page = -1;
1603         gint x_new = 0, y_new = 0;
1604         GList *forms_mapping;
1605
1606         if (!EV_IS_DOCUMENT_FORMS (view->document))
1607                 return NULL;
1608
1609         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1610                 return NULL;
1611
1612         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, page);
1613
1614         if (forms_mapping)
1615                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1616         else
1617                 return NULL;
1618 }
1619
1620 static GdkRegion *
1621 ev_view_form_field_get_region (EvView      *view,
1622                                EvFormField *field)
1623 {
1624         GdkRectangle view_area;
1625         GList       *forms_mapping;
1626         EvMapping   *mapping;
1627
1628         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1629                                                                 field->page->index);
1630         mapping = ev_mapping_list_find (forms_mapping, field);
1631         doc_rect_to_view_rect (view, field->page->index, &mapping->area, &view_area);
1632         view_area.x -= view->scroll_x;
1633         view_area.y -= view->scroll_y;
1634
1635         return gdk_region_rectangle (&view_area);
1636 }
1637
1638 static gboolean
1639 ev_view_forms_remove_widgets (EvView *view)
1640 {
1641         ev_view_remove_all (view);
1642
1643         return FALSE;
1644 }
1645
1646 static void
1647 ev_view_form_field_destroy (GtkWidget *widget,
1648                             EvView    *view)
1649 {
1650         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1651 }
1652
1653 static GtkWidget *
1654 ev_view_form_field_button_create_widget (EvView      *view,
1655                                          EvFormField *field)
1656 {
1657         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1658         GdkRegion         *field_region = NULL;
1659
1660         switch (field_button->type) {
1661                 case EV_FORM_FIELD_BUTTON_PUSH:
1662                         return NULL;
1663                 case EV_FORM_FIELD_BUTTON_CHECK:
1664                 case EV_FORM_FIELD_BUTTON_RADIO: {
1665                         gboolean  state;
1666                         GList    *forms_mapping, *l;
1667
1668                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1669                                                                                field);
1670
1671                         /* FIXME: it actually depends on NoToggleToOff flags */
1672                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1673                             state && field_button->state)
1674                                 return NULL;
1675
1676                         field_region = ev_view_form_field_get_region (view, field);
1677
1678                         /* For radio buttons and checkbox buttons that are in a set
1679                          * we need to update also the region for the current selected item
1680                          */
1681                         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1682                                                                                 field->page->index);
1683                         for (l = forms_mapping; l; l = g_list_next (l)) {
1684                                 EvFormField *button = ((EvMapping *)(l->data))->data;
1685                                 GdkRegion   *button_region;
1686
1687                                 if (button->id == field->id)
1688                                         continue;
1689
1690                                 /* FIXME: only buttons in the same group should be updated */
1691                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1692                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1693                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1694                                         continue;
1695
1696                                 button_region = ev_view_form_field_get_region (view, button);
1697                                 gdk_region_union (field_region, button_region);
1698                                 gdk_region_destroy (button_region);
1699                         }
1700
1701                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
1702                                                                        field, !state);
1703                         field_button->state = !state;
1704                 }
1705                         break;
1706         }
1707
1708         ev_view_reload_page (view, field->page->index, field_region);
1709         gdk_region_destroy (field_region);
1710
1711         return NULL;
1712 }
1713
1714 static void
1715 ev_view_form_field_text_save (EvView    *view,
1716                               GtkWidget *widget)
1717 {
1718         EvFormField *field;
1719
1720         if (!view->document)
1721                 return;
1722
1723         field = g_object_get_data (G_OBJECT (widget), "form-field");
1724
1725         if (field->changed) {
1726                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1727                 GdkRegion       *field_region;
1728
1729                 field_region = ev_view_form_field_get_region (view, field);
1730
1731                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
1732                                                             field, field_text->text);
1733                 field->changed = FALSE;
1734                 ev_view_reload_page (view, field->page->index, field_region);
1735                 gdk_region_destroy (field_region);
1736         }
1737 }
1738
1739 static void
1740 ev_view_form_field_text_changed (GtkWidget   *widget,
1741                                  EvFormField *field)
1742 {
1743         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1744         gchar           *text = NULL;
1745
1746         if (GTK_IS_ENTRY (widget)) {
1747                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
1748         } else if (GTK_IS_TEXT_BUFFER (widget)) {
1749                 GtkTextIter start, end;
1750
1751                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
1752                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
1753                                                  &start, &end, FALSE);
1754         }
1755
1756         if (!field_text->text ||
1757             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
1758                 g_free (field_text->text);
1759                 field_text->text = text;
1760                 field->changed = TRUE;
1761         }
1762 }
1763
1764 static GtkWidget *
1765 ev_view_form_field_text_create_widget (EvView      *view,
1766                                        EvFormField *field)
1767 {
1768         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1769         GtkWidget       *text = NULL;
1770         gchar           *txt;
1771
1772         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
1773                                                           field);
1774
1775         switch (field_text->type) {
1776                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
1777                         /* TODO */
1778                 case EV_FORM_FIELD_TEXT_NORMAL:
1779                         text = gtk_entry_new ();
1780                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
1781                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
1782                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
1783
1784                         if (txt) {
1785                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
1786                                 g_free (txt);
1787                         }
1788
1789                         g_signal_connect (text, "changed",
1790                                           G_CALLBACK (ev_view_form_field_text_changed),
1791                                           field);
1792                         g_signal_connect_after (text, "activate",
1793                                                 G_CALLBACK (ev_view_form_field_destroy),
1794                                                 view);
1795                         break;
1796                 case EV_FORM_FIELD_TEXT_MULTILINE: {
1797                         GtkTextBuffer *buffer;
1798
1799                         text = gtk_text_view_new ();
1800                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
1801
1802                         if (txt) {
1803                                 gtk_text_buffer_set_text (buffer, txt, -1);
1804                                 g_free (txt);
1805                         }
1806
1807                         g_signal_connect (buffer, "changed",
1808                                           G_CALLBACK (ev_view_form_field_text_changed),
1809                                           field);
1810                 }
1811                         break;
1812         }
1813
1814         g_object_weak_ref (G_OBJECT (text),
1815                            (GWeakNotify)ev_view_form_field_text_save,
1816                            view);
1817
1818         return text;
1819 }
1820
1821 static void
1822 ev_view_form_field_choice_save (EvView    *view,
1823                                 GtkWidget *widget)
1824 {
1825         EvFormField *field;
1826
1827         if (!view->document)
1828                 return;
1829
1830         field = g_object_get_data (G_OBJECT (widget), "form-field");
1831
1832         if (field->changed) {
1833                 GList             *l;
1834                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1835                 GdkRegion         *field_region;
1836
1837                 field_region = ev_view_form_field_get_region (view, field);
1838
1839                 if (field_choice->is_editable) {
1840                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
1841                                                                       field, field_choice->text);
1842                 } else {
1843                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
1844                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
1845                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
1846                                                                                  field,
1847                                                                                  GPOINTER_TO_INT (l->data));
1848                         }
1849                 }
1850                 field->changed = FALSE;
1851                 ev_view_reload_page (view, field->page->index, field_region);
1852                 gdk_region_destroy (field_region);
1853         }
1854 }
1855
1856 static void
1857 ev_view_form_field_choice_changed (GtkWidget   *widget,
1858                                    EvFormField *field)
1859 {
1860         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1861
1862         if (GTK_IS_COMBO_BOX (widget)) {
1863                 gint item;
1864
1865                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
1866                 if (!field_choice->selected_items ||
1867                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
1868                         g_list_free (field_choice->selected_items);
1869                         field_choice->selected_items = NULL;
1870                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1871                                                                        GINT_TO_POINTER (item));
1872                         field->changed = TRUE;
1873                 }
1874
1875                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
1876                         gchar *text;
1877
1878                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
1879                         if (!field_choice->text ||
1880                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
1881                                 g_free (field_choice->text);
1882                                 field_choice->text = text;
1883                                 field->changed = TRUE;
1884                         }
1885                 }
1886         } else if (GTK_IS_TREE_SELECTION (widget)) {
1887                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
1888                 GtkTreeModel     *model;
1889                 GList            *items, *l;
1890
1891                 items = gtk_tree_selection_get_selected_rows (selection, &model);
1892                 g_list_free (field_choice->selected_items);
1893                 field_choice->selected_items = NULL;
1894
1895                 for (l = items; l && l->data; l = g_list_next (l)) {
1896                         GtkTreeIter  iter;
1897                         GtkTreePath *path = (GtkTreePath *)l->data;
1898                         gint         item;
1899
1900                         gtk_tree_model_get_iter (model, &iter, path);
1901                         gtk_tree_model_get (model, &iter, 1, &item, -1);
1902
1903                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1904                                                                        GINT_TO_POINTER (item));
1905
1906                         gtk_tree_path_free (path);
1907                 }
1908
1909                 g_list_free (items);
1910
1911                 field->changed = TRUE;
1912         }
1913 }
1914
1915 static GtkWidget *
1916 ev_view_form_field_choice_create_widget (EvView      *view,
1917                                          EvFormField *field)
1918 {
1919         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1920         GtkWidget         *choice;
1921         GtkTreeModel      *model;
1922         gint               n_items, i;
1923         gint               selected_item = 0;
1924
1925         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
1926                                                                    field);
1927         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
1928         for (i = 0; i < n_items; i++) {
1929                 GtkTreeIter iter;
1930                 gchar      *item;
1931
1932                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
1933                                                                      field, i);
1934                 if (ev_document_forms_form_field_choice_is_item_selected (
1935                             EV_DOCUMENT_FORMS (view->document), field, i)) {
1936                         selected_item = i;
1937                         /* FIXME: we need a get_selected_items function in poppler */
1938                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1939                                                                        GINT_TO_POINTER (i));
1940                 }
1941
1942                 if (item) {
1943                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
1944                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
1945                                             0, item,
1946                                             1, i,
1947                                             -1);
1948                         g_free (item);
1949                 }
1950         }
1951
1952         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
1953                 GtkCellRenderer  *renderer;
1954                 GtkWidget        *tree_view;
1955                 GtkTreeSelection *selection;
1956
1957                 tree_view = gtk_tree_view_new_with_model (model);
1958                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
1959
1960                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
1961                 if (field_choice->multi_select) {
1962                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
1963                 }
1964
1965                 /* TODO: set selected items */
1966
1967                 renderer = gtk_cell_renderer_text_new ();
1968                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
1969                                                              0,
1970                                                              "choix", renderer,
1971                                                              "text", 0,
1972                                                              NULL);
1973
1974                 choice = gtk_scrolled_window_new (NULL, NULL);
1975                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
1976                                                 GTK_POLICY_AUTOMATIC,
1977                                                 GTK_POLICY_AUTOMATIC);
1978                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
1979                 gtk_widget_show (tree_view);
1980
1981                 g_signal_connect (selection, "changed",
1982                                   G_CALLBACK (ev_view_form_field_choice_changed),
1983                                   field);
1984                 g_signal_connect_after (selection, "changed",
1985                                         G_CALLBACK (ev_view_form_field_destroy),
1986                                         view);
1987         } else if (field_choice->is_editable) { /* ComboBoxEntry */
1988                 gchar *text;
1989
1990                 choice = gtk_combo_box_entry_new_with_model (model, 0);
1991                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
1992                 if (text) {
1993                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
1994                         g_free (text);
1995                 }
1996
1997                 g_signal_connect (choice, "changed",
1998                                   G_CALLBACK (ev_view_form_field_choice_changed),
1999                                   field);
2000                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
2001                                         G_CALLBACK (ev_view_form_field_destroy),
2002                                         view);
2003         } else { /* ComboBoxText */
2004                 GtkCellRenderer *renderer;
2005
2006                 choice = gtk_combo_box_new_with_model (model);
2007                 renderer = gtk_cell_renderer_text_new ();
2008                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2009                                             renderer, TRUE);
2010                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2011                                                 renderer,
2012                                                 "text", 0,
2013                                                 NULL);
2014                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2015                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2016
2017                 g_signal_connect (choice, "changed",
2018                                   G_CALLBACK (ev_view_form_field_choice_changed),
2019                                   field);
2020                 g_signal_connect_after (choice, "changed",
2021                                         G_CALLBACK (ev_view_form_field_destroy),
2022                                         view);
2023         }
2024
2025         g_object_unref (model);
2026
2027         g_object_weak_ref (G_OBJECT (choice),
2028                            (GWeakNotify)ev_view_form_field_choice_save,
2029                            view);
2030
2031         return choice;
2032 }
2033
2034 static void
2035 ev_view_handle_form_field (EvView      *view,
2036                            EvFormField *field,
2037                            gdouble      x,
2038                            gdouble      y)
2039 {
2040         GtkWidget   *field_widget = NULL;
2041         GList       *form_field_mapping;
2042         EvMapping   *mapping;
2043         GdkRectangle view_area;
2044
2045         if (field->is_read_only)
2046                 return;
2047
2048         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2049                 field_widget = ev_view_form_field_button_create_widget (view, field);
2050         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2051                 field_widget = ev_view_form_field_text_create_widget (view, field);
2052         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2053                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2054         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2055                 /* TODO */
2056         }
2057
2058         /* Form field doesn't require a widget */
2059         if (!field_widget)
2060                 return;
2061
2062         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2063                                 g_object_ref (field),
2064                                 (GDestroyNotify)g_object_unref);
2065
2066         form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, field->page->index);
2067         mapping = ev_mapping_list_find (form_field_mapping, field);
2068
2069         doc_rect_to_view_rect (view, field->page->index, &mapping->area, &view_area);
2070         view_area.x -= view->scroll_x;
2071         view_area.y -= view->scroll_y;
2072
2073         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2074         gtk_widget_show (field_widget);
2075         gtk_widget_grab_focus (field_widget);
2076 }
2077
2078 /* Annotations */
2079 static EvViewWindowChild *
2080 ev_view_get_window_child (EvView    *view,
2081                           GtkWidget *window)
2082 {
2083         GList *children = view->window_children;
2084
2085         while (children) {
2086                 EvViewWindowChild *child;
2087
2088                 child = (EvViewWindowChild *)children->data;
2089                 children = children->next;
2090
2091                 if (child->window == window)
2092                         return child;
2093         }
2094
2095         return NULL;
2096 }
2097
2098 static void
2099 ev_view_window_child_move (EvView            *view,
2100                            EvViewWindowChild *child,
2101                            gint               x,
2102                            gint               y)
2103 {
2104         child->x = x;
2105         child->y = y;
2106         gtk_window_move (GTK_WINDOW (child->window),
2107                          MAX (child->parent_x, x),
2108                          MAX (child->parent_y, y));
2109 }
2110
2111 static void
2112 ev_view_window_child_move_with_parent (EvView    *view,
2113                                        GtkWidget *window)
2114 {
2115         EvViewWindowChild *child;
2116         gint               root_x, root_y;
2117
2118         child = ev_view_get_window_child (view, window);
2119         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2120                                &root_x, &root_y);
2121         if (root_x != child->parent_x || root_y != child->parent_y) {
2122                 gint dest_x, dest_y;
2123
2124                 dest_x = child->x + (root_x - child->parent_x);
2125                 dest_y = child->y + (root_y - child->parent_y);
2126                 child->parent_x = root_x;
2127                 child->parent_y = root_y;
2128                 ev_view_window_child_move (view, child, dest_x, dest_y);
2129         }
2130
2131         if (child->visible && !GTK_WIDGET_VISIBLE (window))
2132                 gtk_widget_show (window);
2133 }
2134
2135 static void
2136 ev_view_window_child_put (EvView    *view,
2137                           GtkWidget *window,
2138                           guint      page,
2139                           gint       x,
2140                           gint       y,
2141                           gdouble    orig_x,
2142                           gdouble    orig_y)
2143 {
2144         EvViewWindowChild *child;
2145         gint               root_x, root_y;
2146
2147         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2148                                &root_x, &root_y);
2149
2150         child = g_new0 (EvViewWindowChild, 1);
2151         child->window = window;
2152         child->page = page;
2153         child->orig_x = orig_x;
2154         child->orig_y = orig_y;
2155         child->parent_x = root_x;
2156         child->parent_y = root_y;
2157         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2158         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2159
2160         if (child->visible)
2161                 gtk_widget_show (window);
2162         else
2163                 gtk_widget_hide (window);
2164
2165         view->window_children = g_list_append (view->window_children, child);
2166 }
2167
2168 static EvViewWindowChild *
2169 ev_view_find_window_child_for_annot (EvView       *view,
2170                                      guint         page,
2171                                      EvAnnotation *annot)
2172 {
2173         GList *children = view->window_children;
2174
2175         while (children) {
2176                 EvViewWindowChild *child;
2177                 EvAnnotation      *wannot;
2178
2179                 child = (EvViewWindowChild *)children->data;
2180                 children = children->next;
2181
2182                 if (child->page != page)
2183                         continue;
2184
2185                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2186                 if (wannot == annot || strcmp (wannot->name, annot->name) == 0)
2187                         return child;
2188         }
2189
2190         return NULL;
2191 }
2192
2193 static void
2194 ev_view_window_children_free (EvView *view)
2195 {
2196         GList *l;
2197
2198         if (!view->window_children)
2199                 return;
2200
2201         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2202                 EvViewWindowChild *child;
2203
2204                 child = (EvViewWindowChild *)l->data;
2205                 gtk_widget_destroy (GTK_WIDGET (child->window));
2206                 g_free (child);
2207         }
2208         g_list_free (view->window_children);
2209         view->window_children = NULL;
2210         view->window_child_focus = NULL;
2211 }
2212
2213 static void
2214 annotation_window_grab_focus (GtkWidget *widget,
2215                               EvView    *view)
2216 {
2217         if (view->window_child_focus)
2218                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2219         view->window_child_focus = ev_view_get_window_child (view, widget);
2220 }
2221
2222 static void
2223 annotation_window_closed (EvAnnotationWindow *window,
2224                           EvView             *view)
2225 {
2226         EvViewWindowChild *child;
2227
2228         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2229         child->visible = FALSE;
2230 }
2231
2232 static void
2233 annotation_window_moved (EvAnnotationWindow *window,
2234                          gint                x,
2235                          gint                y,
2236                          EvView             *view)
2237 {
2238         EvViewWindowChild *child;
2239         GdkRectangle       page_area;
2240         GtkBorder          border;
2241         GdkRectangle       view_rect;
2242         EvRectangle        doc_rect;
2243         gint               width, height;
2244
2245         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2246         if (child->x == x && child->y == y)
2247                 return;
2248
2249         child->moved = TRUE;
2250         child->x = x;
2251         child->y = y;
2252
2253         /* Window has been moved by the user,
2254          * we have to set a new origin in doc coords
2255          */
2256         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2257         view_rect.x = (x - child->parent_x) + view->scroll_x;
2258         view_rect.y = (y - child->parent_y) + view->scroll_y;
2259         view_rect.width = width;
2260         view_rect.height = height;
2261
2262         get_page_extents (view, child->page, &page_area, &border);
2263         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2264         child->orig_x = doc_rect.x1;
2265         child->orig_y = doc_rect.y1;
2266 }
2267
2268 static void
2269 ev_view_annotation_save (EvView       *view,
2270                          EvAnnotation *annot)
2271 {
2272         if (!view->document)
2273                 return;
2274
2275         if (!annot->changed)
2276                 return;
2277
2278         ev_document_annotations_annotation_set_contents (EV_DOCUMENT_ANNOTATIONS (view->document),
2279                                                          annot, annot->contents);
2280         annot->changed = FALSE;
2281 }
2282
2283 static void
2284 show_annotation_windows (EvView *view,
2285                          gint    page)
2286 {
2287         GList     *annots, *l;
2288         GtkWindow *parent;
2289
2290         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2291
2292         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2293
2294         for (l = annots; l && l->data; l = g_list_next (l)) {
2295                 EvAnnotation      *annot;
2296                 EvViewWindowChild *child;
2297                 GtkWidget         *window;
2298                 EvRectangle       *doc_rect;
2299                 GdkRectangle       view_rect;
2300
2301                 annot = ((EvMapping *)(l->data))->data;
2302
2303                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2304                         continue;
2305
2306                 window = g_object_get_data (G_OBJECT (annot), "popup");
2307                 if (window) {
2308                         ev_view_window_child_move_with_parent (view, window);
2309                         continue;
2310                 }
2311
2312                 /* Look if we already have a popup for this annot */
2313                 child = ev_view_find_window_child_for_annot (view, page, annot);
2314                 window = child ? child->window : NULL;
2315                 if (window) {
2316                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2317                         g_object_set_data (G_OBJECT (annot), "popup", window);
2318                         ev_view_window_child_move_with_parent (view, window);
2319                 } else {
2320                         window = ev_annotation_window_new (annot, parent);
2321                         g_signal_connect (window, "grab_focus",
2322                                           G_CALLBACK (annotation_window_grab_focus),
2323                                           view);
2324                         g_signal_connect (window, "closed",
2325                                           G_CALLBACK (annotation_window_closed),
2326                                           view);
2327                         g_signal_connect (window, "moved",
2328                                           G_CALLBACK (annotation_window_moved),
2329                                           view);
2330                         g_object_set_data (G_OBJECT (annot), "popup", window);
2331
2332                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2333                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2334                         view_rect.x -= view->scroll_x;
2335                         view_rect.y -= view->scroll_y;
2336
2337                         ev_view_window_child_put (view, window, page,
2338                                                   view_rect.x, view_rect.y,
2339                                                   doc_rect->x1, doc_rect->y1);
2340
2341                         g_object_weak_ref (G_OBJECT (annot),
2342                                            (GWeakNotify)ev_view_annotation_save,
2343                                            view);
2344                 }
2345         }
2346 }
2347
2348 static void
2349 hide_annotation_windows (EvView *view,
2350                          gint    page)
2351 {
2352         GList *annots, *l;
2353
2354         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2355
2356         for (l = annots; l && l->data; l = g_list_next (l)) {
2357                 EvAnnotation *annot;
2358                 GtkWidget    *window;
2359
2360                 annot = ((EvMapping *)(l->data))->data;
2361
2362                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2363                         continue;
2364
2365                 window = g_object_get_data (G_OBJECT (annot), "popup");
2366                 if (window)
2367                         gtk_widget_hide (window);
2368         }
2369 }
2370
2371 static EvAnnotation *
2372 ev_view_get_annotation_at_location (EvView  *view,
2373                                     gdouble  x,
2374                                     gdouble  y)
2375 {
2376         gint page = -1;
2377         gint x_new = 0, y_new = 0;
2378         GList *annotations_mapping;
2379
2380         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2381                 return NULL;
2382
2383         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2384                 return NULL;
2385
2386         annotations_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2387
2388         if (annotations_mapping)
2389                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2390         else
2391                 return NULL;
2392 }
2393
2394 static void
2395 ev_view_handle_annotation (EvView       *view,
2396                            EvAnnotation *annot,
2397                            gdouble       x,
2398                            gdouble       y)
2399 {
2400         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2401                 GtkWidget *window;
2402
2403                 window = g_object_get_data (G_OBJECT (annot), "popup");
2404                 if (window) {
2405                         EvViewWindowChild *child;
2406
2407                         child = ev_view_get_window_child (view, window);
2408                         if (!child->visible) {
2409                                 child->visible = TRUE;
2410                                 ev_view_window_child_move (view, child, child->x, child->y);
2411                                 gtk_widget_show (window);
2412                         }
2413                 }
2414         }
2415 }
2416
2417 /*** GtkWidget implementation ***/
2418
2419 static void
2420 ev_view_size_request_continuous_dual_page (EvView         *view,
2421                                            GtkRequisition *requisition)
2422 {
2423         int max_width;
2424         gint n_pages;
2425         GtkBorder border;
2426
2427         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2428                                      view->scale, &max_width);
2429         compute_border (view, max_width, max_width, &border);
2430
2431         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
2432
2433         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2434         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
2435
2436         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2437                 requisition->width = 1;
2438         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2439                 requisition->width = 1;
2440                 /* FIXME: This could actually be set on one page docs or docs
2441                  * with a strange aspect ratio. */
2442                 /* requisition->height = 1;*/
2443         }
2444 }
2445
2446 static void
2447 ev_view_size_request_continuous (EvView         *view,
2448                                  GtkRequisition *requisition)
2449 {
2450         int max_width;
2451         int n_pages;
2452         GtkBorder border;
2453
2454
2455         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2456                                      view->scale, &max_width);
2457         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2458         compute_border (view, max_width, max_width, &border);
2459
2460         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2461         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
2462
2463         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2464                 requisition->width = 1;
2465         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2466                 requisition->width = 1;
2467                 /* FIXME: This could actually be set on one page docs or docs
2468                  * with a strange aspect ratio. */
2469                 /* requisition->height = 1;*/
2470         }
2471 }
2472
2473 static void
2474 ev_view_size_request_dual_page (EvView         *view,
2475                                 GtkRequisition *requisition)
2476 {
2477         GtkBorder border;
2478         gint width, height;
2479
2480         /* Find the largest of the two. */
2481         ev_page_cache_get_size (view->page_cache,
2482                                 view->current_page,
2483                                 view->rotation,
2484                                 view->scale,
2485                                 &width, &height);
2486         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
2487                 gint width_2, height_2;
2488                 ev_page_cache_get_size (view->page_cache,
2489                                         view->current_page + 1,
2490                                         view->rotation,
2491                                         view->scale,
2492                                         &width_2, &height_2);
2493                 if (width_2 > width) {
2494                         width = width_2;
2495                         height = height_2;
2496                 }
2497         }
2498         compute_border (view, width, height, &border);
2499
2500         requisition->width = ((width + border.left + border.right) * 2) +
2501                 (view->spacing * 3);
2502         requisition->height = (height + border.top + border.bottom) +
2503                 (view->spacing * 2);
2504
2505         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2506                 requisition->width = 1;
2507         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2508                 requisition->width = 1;
2509                 requisition->height = 1;
2510         }
2511 }
2512
2513 static void
2514 ev_view_size_request_single_page (EvView         *view,
2515                                   GtkRequisition *requisition)
2516 {
2517         GtkBorder border;
2518         gint width, height;
2519
2520         ev_page_cache_get_size (view->page_cache,
2521                                 view->current_page,
2522                                 view->rotation,
2523                                 view->scale,
2524                                 &width, &height);
2525         compute_border (view, width, height, &border);
2526
2527         requisition->width = width + border.left + border.right + (2 * view->spacing);
2528         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2529
2530         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2531                 requisition->width = 1;
2532                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2533         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2534                 requisition->width = 1;
2535                 requisition->height = 1;
2536         }
2537 }
2538
2539 static void
2540 ev_view_size_request (GtkWidget      *widget,
2541                       GtkRequisition *requisition)
2542 {
2543         EvView *view = EV_VIEW (widget);
2544
2545         if (view->document == NULL) {
2546                 requisition->width = 1;
2547                 requisition->height = 1;
2548                 return;
2549         }
2550
2551         if (view->presentation) {
2552                 requisition->width = 1;
2553                 requisition->height = 1;
2554                 return;
2555         }
2556
2557         if (view->continuous && view->dual_page)
2558                 ev_view_size_request_continuous_dual_page (view, requisition);
2559         else if (view->continuous)
2560                 ev_view_size_request_continuous (view, requisition);
2561         else if (view->dual_page)
2562                 ev_view_size_request_dual_page (view, requisition);
2563         else
2564                 ev_view_size_request_single_page (view, requisition);
2565 }
2566
2567 static void
2568 ev_view_size_allocate (GtkWidget      *widget,
2569                        GtkAllocation  *allocation)
2570 {
2571         EvView *view = EV_VIEW (widget);
2572         GList  *children, *l;
2573         gint    root_x, root_y;
2574
2575         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2576
2577         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2578             view->sizing_mode == EV_SIZING_BEST_FIT) {
2579                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
2580                 ev_view_size_request (widget, &widget->requisition);
2581         }
2582
2583         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2584         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2585
2586         if (view->document)
2587                 view_update_range_and_current_page (view);
2588
2589         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2590         view->pending_resize = FALSE;
2591
2592         children = gtk_container_get_children (GTK_CONTAINER (widget));
2593         for (l = children; l && l->data; l = g_list_next (l)) {
2594                 EvFormField   *field;
2595                 GdkRectangle   view_area;
2596                 GList         *form_field_mapping;
2597                 EvMapping     *mapping;
2598                 GtkAllocation  child_allocation;
2599                 GtkRequisition child_requisition;
2600                 GtkWidget     *child = (GtkWidget *)l->data;
2601
2602                 field = g_object_get_data (G_OBJECT (child), "form-field");
2603                 if (!field)
2604                         continue;
2605
2606                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2607                                                                              field->page->index);
2608                 mapping = ev_mapping_list_find (form_field_mapping, field);
2609
2610                 doc_rect_to_view_rect (view, field->page->index, &mapping->area, &view_area);
2611                 view_area.x -= view->scroll_x;
2612                 view_area.y -= view->scroll_y;
2613
2614                 gtk_widget_size_request (child, &child_requisition);
2615                 if (child_requisition.width != view_area.width ||
2616                     child_requisition.height != view_area.height)
2617                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2618
2619                 gtk_container_child_get (GTK_CONTAINER (widget),
2620                                          child,
2621                                          "x", &child_allocation.x,
2622                                          "y", &child_allocation.y,
2623                                          NULL);
2624                 if (child_allocation.x != view_area.x ||
2625                     child_allocation.y != view_area.y) {
2626                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2627                 }
2628         }
2629         g_list_free (children);
2630
2631         if (view->window_children)
2632                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2633                                        &root_x, &root_y);
2634
2635         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2636                 EvViewWindowChild *child;
2637                 EvRectangle        doc_rect;
2638                 GdkRectangle       view_rect;
2639
2640                 child = (EvViewWindowChild *)l->data;
2641
2642                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
2643                 if (child->moved) {
2644                         doc_rect.x1 = child->orig_x;
2645                         doc_rect.y1 = child->orig_y;
2646                 }
2647                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
2648                 view_rect.x -= view->scroll_x;
2649                 view_rect.y -= view->scroll_y;
2650
2651                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
2652                         child->parent_x = root_x;
2653                         child->parent_y = root_y;
2654                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
2655                 }
2656         }
2657 }
2658
2659 static void
2660 ev_view_realize (GtkWidget *widget)
2661 {
2662         EvView *view = EV_VIEW (widget);
2663
2664         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
2665                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
2666
2667         gdk_window_set_events (view->layout.bin_window,
2668                                (gdk_window_get_events (view->layout.bin_window) |
2669                                 GDK_EXPOSURE_MASK |
2670                                 GDK_BUTTON_PRESS_MASK |
2671                                 GDK_BUTTON_RELEASE_MASK |
2672                                 GDK_SCROLL_MASK |
2673                                 GDK_KEY_PRESS_MASK |
2674                                 GDK_POINTER_MOTION_MASK |
2675                                 GDK_POINTER_MOTION_HINT_MASK |
2676                                 GDK_ENTER_NOTIFY_MASK |
2677                                 GDK_LEAVE_NOTIFY_MASK));
2678
2679         if (view->presentation)
2680                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
2681         else
2682                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
2683 }
2684
2685 static gboolean
2686 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
2687 {
2688         EvView *view = EV_VIEW (widget);
2689         guint state;
2690
2691         state = event->state & gtk_accelerator_get_default_mod_mask ();
2692
2693         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
2694                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
2695
2696                 if (event->direction == GDK_SCROLL_UP ||
2697                     event->direction == GDK_SCROLL_LEFT) {
2698                         if (ev_view_can_zoom_in (view)) {
2699                                 ev_view_zoom_in (view);
2700                         }
2701                 } else {
2702                         if (ev_view_can_zoom_out (view)) {
2703                                 ev_view_zoom_out (view);
2704                         }
2705                 }
2706
2707                 return TRUE;
2708         }
2709
2710         view->jump_to_find_result = FALSE;
2711
2712         /* Shift+Wheel scrolls the in the perpendicular direction */
2713         if (state & GDK_SHIFT_MASK) {
2714                 if (event->direction == GDK_SCROLL_UP)
2715                         event->direction = GDK_SCROLL_LEFT;
2716                 else if (event->direction == GDK_SCROLL_LEFT)
2717                         event->direction = GDK_SCROLL_UP;
2718                 else if (event->direction == GDK_SCROLL_DOWN)
2719                         event->direction = GDK_SCROLL_RIGHT;
2720                 else if (event->direction == GDK_SCROLL_RIGHT)
2721                         event->direction = GDK_SCROLL_DOWN;
2722
2723                 event->state &= ~GDK_SHIFT_MASK;
2724                 state &= ~GDK_SHIFT_MASK;
2725         }
2726
2727         if (state == 0 && view->presentation) {
2728                 switch (event->direction) {
2729                         case GDK_SCROLL_DOWN:
2730                         case GDK_SCROLL_RIGHT:
2731                                 ev_view_next_page (view);
2732                                 break;
2733                         case GDK_SCROLL_UP:
2734                         case GDK_SCROLL_LEFT:
2735                                 ev_view_previous_page (view);
2736                                 break;
2737                 }
2738
2739                 return TRUE;
2740         }
2741
2742         return FALSE;
2743 }
2744
2745 static EvViewSelection *
2746 find_selection_for_page (EvView *view,
2747                          gint    page)
2748 {
2749         GList *list;
2750
2751         for (list = view->selection_info.selections; list != NULL; list = list->next) {
2752                 EvViewSelection *selection;
2753
2754                 selection = (EvViewSelection *) list->data;
2755
2756                 if (selection->page == page)
2757                         return selection;
2758         }
2759
2760         return NULL;
2761 }
2762
2763 static void
2764 draw_end_presentation_page (EvView       *view,
2765                             GdkRectangle *page_area)
2766 {
2767         PangoLayout *layout;
2768         PangoFontDescription *font_desc;
2769         gchar *markup;
2770         const gchar *text = _("End of presentation. Press Escape to exit.");
2771
2772         if (view->presentation_state != EV_PRESENTATION_END)
2773                 return;
2774
2775         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
2776         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
2777         pango_layout_set_markup (layout, markup, -1);
2778         g_free (markup);
2779
2780         font_desc = pango_font_description_new ();
2781         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
2782         pango_layout_set_font_description (layout, font_desc);
2783
2784         gtk_paint_layout (GTK_WIDGET (view)->style,
2785                           view->layout.bin_window,
2786                           GTK_WIDGET_STATE (view),
2787                           FALSE,
2788                           page_area,
2789                           GTK_WIDGET (view),
2790                           NULL,
2791                           page_area->x + 15,
2792                           page_area->y + 15,
2793                           layout);
2794
2795         pango_font_description_free (font_desc);
2796         g_object_unref (layout);
2797 }
2798
2799 static gboolean
2800 ev_view_expose_event (GtkWidget      *widget,
2801                       GdkEventExpose *event)
2802 {
2803         EvView  *view = EV_VIEW (widget);
2804         cairo_t *cr;
2805         gint     i;
2806
2807         if (view->animation) {
2808                 if (ev_transition_animation_ready (view->animation)) {
2809                         GdkRectangle page_area;
2810                         GtkBorder    border;
2811
2812                         if (get_page_extents (view, view->current_page, &page_area, &border)) {
2813                                 cr = gdk_cairo_create (view->layout.bin_window);
2814
2815                                 /* normalize to x=0, y=0 */
2816                                 cairo_translate (cr, page_area.x, page_area.y);
2817                                 page_area.x = page_area.y = 0;
2818
2819                                 ev_transition_animation_paint (view->animation, cr, page_area);
2820                                 cairo_destroy (cr);
2821                         }
2822                 }
2823
2824                 return TRUE;
2825         }
2826
2827         if (view->presentation) {
2828                 switch (view->presentation_state) {
2829                         case EV_PRESENTATION_END: {
2830                                 GdkRectangle area = {0};
2831
2832                                 area.width = widget->allocation.width;
2833                                 area.height = widget->allocation.height;
2834
2835                                 draw_end_presentation_page (view, &area);
2836                         }
2837                                 return FALSE;
2838                         case EV_PRESENTATION_BLACK:
2839                         case EV_PRESENTATION_WHITE:
2840                                 return FALSE;
2841                         case EV_PRESENTATION_NORMAL:
2842                         default:
2843                                 break;
2844                 }
2845         } else if (view->loading) {
2846                 GdkRectangle area = {0};
2847
2848                 area.width = widget->allocation.width;
2849                 area.height = widget->allocation.height;
2850
2851                 draw_loading_text (view,
2852                                    &area,
2853                                    &(event->area));
2854         }
2855
2856         if (view->document == NULL)
2857                 return FALSE;
2858
2859         cr = gdk_cairo_create (view->layout.bin_window);
2860
2861         for (i = view->start_page; i <= view->end_page; i++) {
2862                 GdkRectangle page_area;
2863                 GtkBorder border;
2864                 gboolean page_ready = TRUE;
2865
2866                 if (!get_page_extents (view, i, &page_area, &border))
2867                         continue;
2868
2869                 page_area.x -= view->scroll_x;
2870                 page_area.y -= view->scroll_y;
2871
2872                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
2873
2874                 if (page_ready && view->find_pages && view->highlight_find_results)
2875                         highlight_find_results (view, i);
2876                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2877                         show_annotation_windows (view, i);
2878         }
2879
2880         cairo_destroy (cr);
2881
2882         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
2883                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
2884
2885         return FALSE;
2886 }
2887
2888 static gboolean
2889 ev_view_do_popup_menu (EvView *view,
2890                        gdouble x,
2891                        gdouble y)
2892 {
2893         EvLink  *link;
2894         EvImage *image;
2895
2896         image = ev_view_get_image_at_location (view, x, y);
2897         if (image) {
2898                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
2899                 return TRUE;
2900         }
2901
2902         link = ev_view_get_link_at_location (view, x, y);
2903         if (link) {
2904                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
2905                 return TRUE;
2906         }
2907
2908         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
2909
2910         return TRUE;
2911 }
2912
2913 static gboolean
2914 ev_view_popup_menu (GtkWidget *widget)
2915 {
2916         gint x, y;
2917
2918         gtk_widget_get_pointer (widget, &x, &y);
2919         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
2920 }
2921
2922 static void
2923 get_link_area (EvView       *view,
2924                gint          x,
2925                gint          y,
2926                EvLink       *link,
2927                GdkRectangle *area)
2928 {
2929         GList     *link_mapping;
2930         EvMapping *mapping;
2931         gint       page;
2932         gint       x_offset = 0, y_offset = 0;
2933
2934         x += view->scroll_x;
2935         y += view->scroll_y;
2936
2937         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
2938
2939         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
2940         mapping = ev_mapping_list_find (link_mapping, link);
2941
2942         doc_rect_to_view_rect (view, page, &mapping->area, area);
2943         area->y -= view->scroll_y;
2944 }
2945
2946 static void
2947 get_annot_area (EvView       *view,
2948                gint          x,
2949                gint          y,
2950                EvAnnotation *annot,
2951                GdkRectangle *area)
2952 {
2953         GList     *annots_mapping;
2954         EvMapping *mapping;
2955         gint       page;
2956         gint       x_offset = 0, y_offset = 0;
2957
2958         x += view->scroll_x;
2959         y += view->scroll_y;
2960
2961         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
2962
2963         annots_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2964         mapping = ev_mapping_list_find (annots_mapping, annot);
2965
2966         doc_rect_to_view_rect (view, page, &mapping->area, area);
2967         area->y -= view->scroll_y;
2968 }
2969
2970 static gboolean
2971 ev_view_query_tooltip (GtkWidget  *widget,
2972                        gint        x,
2973                        gint        y,
2974                        gboolean    keyboard_tip,
2975                        GtkTooltip *tooltip)
2976 {
2977         EvView       *view = EV_VIEW (widget);
2978         EvLink       *link;
2979         EvAnnotation *annot;
2980         gchar        *text;
2981
2982         annot = ev_view_get_annotation_at_location (view, x, y);
2983         if (annot && annot->contents) {
2984                 GdkRectangle annot_area;
2985
2986                 get_annot_area (view, x, y, annot, &annot_area);
2987                 gtk_tooltip_set_text (tooltip, annot->contents);
2988                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
2989
2990                 return TRUE;
2991         }
2992
2993         link = ev_view_get_link_at_location (view, x, y);
2994         if (!link)
2995                 return FALSE;
2996
2997         text = tip_from_link (view, link);
2998         if (text && g_utf8_validate (text, -1, NULL)) {
2999                 GdkRectangle link_area;
3000
3001                 get_link_area (view, x, y, link, &link_area);
3002                 gtk_tooltip_set_text (tooltip, text);
3003                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3004         }
3005         g_free (text);
3006
3007         return TRUE;
3008 }
3009
3010 static void
3011 start_selection_for_event (EvView         *view,
3012                            GdkEventButton *event)
3013 {
3014         EvSelectionStyle style;
3015
3016         clear_selection (view);
3017
3018         view->selection_info.start.x = event->x + view->scroll_x;
3019         view->selection_info.start.y = event->y + view->scroll_y;
3020
3021         switch (event->type) {
3022                 case GDK_2BUTTON_PRESS:
3023                         style = EV_SELECTION_STYLE_WORD;
3024                         break;
3025                 case GDK_3BUTTON_PRESS:
3026                         style = EV_SELECTION_STYLE_LINE;
3027                         break;
3028                 default:
3029                         style = EV_SELECTION_STYLE_GLYPH;
3030                         break;
3031         }
3032
3033         view->selection_info.style = style;
3034 }
3035
3036 static gboolean
3037 ev_view_button_press_event (GtkWidget      *widget,
3038                             GdkEventButton *event)
3039 {
3040         EvView *view = EV_VIEW (widget);
3041
3042         if (!view->document)
3043                 return FALSE;
3044
3045         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3046                 gtk_widget_grab_focus (widget);
3047         }
3048
3049         if (view->window_child_focus) {
3050                 EvAnnotationWindow *window;
3051                 EvAnnotation       *annot;
3052
3053                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3054                 annot = ev_annotation_window_get_annotation (window);
3055                 ev_annotation_window_ungrab_focus (window);
3056                 ev_view_annotation_save (view, annot);
3057                 view->window_child_focus = NULL;
3058         }
3059
3060         view->pressed_button = event->button;
3061         view->selection_info.in_drag = FALSE;
3062
3063         if (view->scroll_info.autoscrolling)
3064                 return TRUE;
3065
3066         switch (event->button) {
3067                 case 1: {
3068                         EvImage *image;
3069                         EvAnnotation *annot;
3070                         EvFormField *field;
3071
3072                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3073                                 if (event->type == GDK_3BUTTON_PRESS) {
3074                                         start_selection_for_event (view, event);
3075                                 } else if (location_in_selected_text (view,
3076                                                                event->x + view->scroll_x,
3077                                                                event->y + view->scroll_y)) {
3078                                         view->selection_info.in_drag = TRUE;
3079                                 } else {
3080                                         start_selection_for_event (view, event);
3081                                 }
3082
3083                                 gtk_widget_queue_draw (widget);
3084                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3085                                 ev_view_handle_annotation (view, annot, event->x, event->y);
3086                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3087                                 ev_view_remove_all (view);
3088                                 ev_view_handle_form_field (view, field, event->x, event->y);
3089                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3090                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3091                                 if (view->image_dnd_info.image)
3092                                         g_object_unref (view->image_dnd_info.image);
3093                                 view->image_dnd_info.image = g_object_ref (image);
3094                                 view->image_dnd_info.in_drag = TRUE;
3095
3096                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3097                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3098                         } else {
3099                                 ev_view_remove_all (view);
3100
3101                                 if (EV_IS_SELECTION (view->document))
3102                                         start_selection_for_event (view, event);
3103                         }
3104                 }
3105                         return TRUE;
3106                 case 2:
3107                         /* use root coordinates as reference point because
3108                          * scrolling changes window relative coordinates */
3109                         view->drag_info.start.x = event->x_root;
3110                         view->drag_info.start.y = event->y_root;
3111                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3112                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3113
3114                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3115
3116                         return TRUE;
3117                 case 3:
3118                         view->scroll_info.start_y = event->y;
3119                         return ev_view_do_popup_menu (view, event->x, event->y);
3120         }
3121
3122         return FALSE;
3123 }
3124
3125 static void
3126 ev_view_remove_all (EvView *view)
3127 {
3128         GList *children, *child;
3129
3130         children = gtk_container_get_children (GTK_CONTAINER (view));
3131         for (child = children; child && child->data; child = g_list_next (child)) {
3132                 gtk_container_remove (GTK_CONTAINER (view),
3133                                       GTK_WIDGET (child->data));
3134         }
3135         g_list_free (children);
3136 }
3137
3138 /*** Drag and Drop ***/
3139 static void
3140 ev_view_drag_data_get (GtkWidget        *widget,
3141                        GdkDragContext   *context,
3142                        GtkSelectionData *selection_data,
3143                        guint             info,
3144                        guint             time)
3145 {
3146         EvView *view = EV_VIEW (widget);
3147
3148         switch (info) {
3149                 case TARGET_DND_TEXT:
3150                         if (EV_IS_SELECTION (view->document) &&
3151                             view->selection_info.selections) {
3152                                 gchar *text;
3153
3154                                 text = get_selected_text (view);
3155                                 gtk_selection_data_set_text (selection_data,
3156                                                              text,
3157                                                              strlen (text));
3158                                 g_free (text);
3159                         }
3160                         break;
3161                 case TARGET_DND_IMAGE:
3162                         if (view->image_dnd_info.image) {
3163                                 GdkPixbuf *pixbuf;
3164
3165                                 ev_document_doc_mutex_lock ();
3166                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3167                                                                        view->image_dnd_info.image);
3168                                 ev_document_doc_mutex_unlock ();
3169
3170                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3171                                 g_object_unref (pixbuf);
3172                         }
3173                         break;
3174                 case TARGET_DND_URI:
3175                         if (view->image_dnd_info.image) {
3176                                 GdkPixbuf   *pixbuf;
3177                                 const gchar *tmp_uri;
3178                                 gchar       *uris[2];
3179
3180                                 ev_document_doc_mutex_lock ();
3181                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3182                                                                        view->image_dnd_info.image);
3183                                 ev_document_doc_mutex_unlock ();
3184
3185                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3186                                 g_object_unref (pixbuf);
3187
3188                                 uris[0] = (gchar *)tmp_uri;
3189                                 uris[1] = NULL;
3190                                 gtk_selection_data_set_uris (selection_data, uris);
3191                         }
3192         }
3193 }
3194
3195 static gboolean
3196 ev_view_drag_motion (GtkWidget      *widget,
3197                      GdkDragContext *context,
3198                      gint            x,
3199                      gint            y,
3200                      guint           time)
3201 {
3202         if (gtk_drag_get_source_widget (context) == widget)
3203                 gdk_drag_status (context, 0, time);
3204         else
3205                 gdk_drag_status (context, context->suggested_action, time);
3206
3207         return TRUE;
3208 }
3209
3210 static gboolean
3211 selection_update_idle_cb (EvView *view)
3212 {
3213         compute_selections (view,
3214                             view->selection_info.style,
3215                             &view->selection_info.start,
3216                             &view->motion);
3217         view->selection_update_id = 0;
3218         return FALSE;
3219 }
3220
3221 static gboolean
3222 selection_scroll_timeout_cb (EvView *view)
3223 {
3224         gint x, y, shift = 0;
3225         GtkWidget *widget = GTK_WIDGET (view);
3226
3227         gtk_widget_get_pointer (widget, &x, &y);
3228
3229         if (y > widget->allocation.height) {
3230                 shift = (y - widget->allocation.height) / 2;
3231         } else if (y < 0) {
3232                 shift = y / 2;
3233         }
3234
3235         if (shift)
3236                 gtk_adjustment_set_value (view->vadjustment,
3237                                           CLAMP (view->vadjustment->value + shift,
3238                                           view->vadjustment->lower,
3239                                           view->vadjustment->upper -
3240                                           view->vadjustment->page_size));
3241
3242         if (x > widget->allocation.width) {
3243                 shift = (x - widget->allocation.width) / 2;
3244         } else if (x < 0) {
3245                 shift = x / 2;
3246         }
3247
3248         if (shift)
3249                 gtk_adjustment_set_value (view->hadjustment,
3250                                           CLAMP (view->hadjustment->value + shift,
3251                                           view->hadjustment->lower,
3252                                           view->hadjustment->upper -
3253                                           view->hadjustment->page_size));
3254
3255         return TRUE;
3256 }
3257
3258 static gboolean
3259 ev_view_drag_update_momentum (EvView *view)
3260 {
3261         int i;
3262         if (!view->drag_info.in_drag)
3263                 return FALSE;
3264
3265         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3266                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3267                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3268         }
3269
3270         /* Momentum is a moving average of 10ms granularity over
3271          * the last 100ms with each 10ms stored in buffer.
3272          */
3273
3274         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3275         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3276
3277         return TRUE;
3278 }
3279
3280 static gboolean
3281 ev_view_scroll_drag_release (EvView *view)
3282 {
3283         gdouble dhadj_value, dvadj_value;
3284         gdouble oldhadjustment, oldvadjustment;
3285
3286         view->drag_info.momentum.x /= 1.2;
3287         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3288
3289         dhadj_value = view->hadjustment->page_size *
3290                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
3291         dvadj_value = view->vadjustment->page_size *
3292                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
3293
3294         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3295         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3296
3297      /* When we reach the edges, we need either to absorb some momentum and bounce by
3298       * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3299      if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
3300            ((oldhadjustment + dhadj_value) < 0))
3301                 view->drag_info.momentum.x = 0;
3302         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
3303            ((oldvadjustment + dvadj_value) < 0))
3304                 view->drag_info.momentum.y = 0;
3305
3306         gtk_adjustment_set_value (view->hadjustment,
3307                                 MIN (oldhadjustment + dhadj_value,
3308                                 view->hadjustment->upper - view->hadjustment->page_size));
3309         gtk_adjustment_set_value (view->vadjustment,
3310                                 MIN (oldvadjustment + dvadj_value,
3311                                 view->vadjustment->upper - view->vadjustment->page_size));
3312
3313         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3314            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3315                 return FALSE;
3316         else
3317                 return TRUE;
3318 }
3319
3320 static gboolean
3321 ev_view_motion_notify_event (GtkWidget      *widget,
3322                              GdkEventMotion *event)
3323 {
3324         EvView *view = EV_VIEW (widget);
3325         gint x, y;
3326
3327         if (!view->document)
3328                 return FALSE;
3329
3330
3331         if (event->is_hint || event->window != view->layout.bin_window) {
3332             gtk_widget_get_pointer (widget, &x, &y);
3333         } else {
3334             x = event->x;
3335             y = event->y;
3336         }
3337
3338         if (view->scroll_info.autoscrolling) {
3339                 view->scroll_info.last_y = y;
3340                 return TRUE;
3341         }
3342
3343         if (view->selection_info.in_drag) {
3344                 if (gtk_drag_check_threshold (widget,
3345                                               view->selection_info.start.x,
3346                                               view->selection_info.start.y,
3347                                               x, y)) {
3348                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3349
3350                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3351
3352                         gtk_drag_begin (widget, target_list,
3353                                         GDK_ACTION_COPY,
3354                                         1, (GdkEvent *)event);
3355
3356                         view->selection_info.in_drag = FALSE;
3357
3358                         gtk_target_list_unref (target_list);
3359
3360                         return TRUE;
3361                 }
3362         } else if (view->image_dnd_info.in_drag) {
3363                 if (gtk_drag_check_threshold (widget,
3364                                               view->selection_info.start.x,
3365                                               view->selection_info.start.y,
3366                                               x, y)) {
3367                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3368
3369                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3370                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3371
3372                         gtk_drag_begin (widget, target_list,
3373                                         GDK_ACTION_COPY,
3374                                         1, (GdkEvent *)event);
3375
3376                         view->image_dnd_info.in_drag = FALSE;
3377
3378                         gtk_target_list_unref (target_list);
3379
3380                         return TRUE;
3381                 }
3382         }
3383
3384         switch (view->pressed_button) {
3385         case 1:
3386                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3387                  * documents only.
3388                  */
3389                 if (view->rotation != 0)
3390                         return FALSE;
3391
3392                 /* Schedule timeout to scroll during selection and additionally
3393                  * scroll once to allow arbitrary speed. */
3394                 if (!view->selection_scroll_id)
3395                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3396                                                                (GSourceFunc)selection_scroll_timeout_cb,
3397                                                                view);
3398                 else
3399                     selection_scroll_timeout_cb (view);
3400
3401                 view->selection_info.in_selection = TRUE;
3402                 view->motion.x = x + view->scroll_x;
3403                 view->motion.y = y + view->scroll_y;
3404
3405                 /* Queue an idle to handle the motion.  We do this because
3406                  * handling any selection events in the motion could be slower
3407                  * than new motion events reach us.  We always put it in the
3408                  * idle to make sure we catch up and don't visibly lag the
3409                  * mouse. */
3410                 if (!view->selection_update_id)
3411                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3412
3413                 return TRUE;
3414         case 2:
3415                 if (!view->drag_info.in_drag) {
3416                         gboolean start;
3417                         int i;
3418
3419                         start = gtk_drag_check_threshold (widget,
3420                                                           view->drag_info.start.x,
3421                                                           view->drag_info.start.y,
3422                                                           event->x_root,
3423                                                           event->y_root);
3424                         view->drag_info.in_drag = start;
3425                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3426                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3427                         /* Set 100 to choose how long it takes to build up momentum */
3428                         /* Clear out previous momentum info: */
3429                         for (i = 0; i < DRAG_HISTORY; i++) {
3430                                 view->drag_info.buffer[i].x = event->x;
3431                                 view->drag_info.buffer[i].y = event->y;
3432                         }
3433                         view->drag_info.momentum.x = 0;
3434                         view->drag_info.momentum.y = 0;
3435                 }
3436
3437                 if (view->drag_info.in_drag) {
3438                         int dx, dy;
3439                         gdouble dhadj_value, dvadj_value;
3440
3441                         view->drag_info.buffer[0].x = event->x;
3442                         view->drag_info.buffer[0].y = event->y;
3443
3444                         dx = event->x_root - view->drag_info.start.x;
3445                         dy = event->y_root - view->drag_info.start.y;
3446
3447                         dhadj_value = view->hadjustment->page_size *
3448                                       (gdouble)dx / widget->allocation.width;
3449                         dvadj_value = view->vadjustment->page_size *
3450                                       (gdouble)dy / widget->allocation.height;
3451
3452                         /* clamp scrolling to visible area */
3453                         gtk_adjustment_set_value (view->hadjustment,
3454                                                   MIN(view->drag_info.hadj - dhadj_value,
3455                                                       view->hadjustment->upper -
3456                                                       view->hadjustment->page_size));
3457                         gtk_adjustment_set_value (view->vadjustment,
3458                                                   MIN(view->drag_info.vadj - dvadj_value,
3459                                                       view->vadjustment->upper -
3460                                                       view->vadjustment->page_size));
3461
3462                         return TRUE;
3463                 }
3464
3465                 break;
3466         default:
3467                 ev_view_handle_cursor_over_xy (view, x, y);
3468         }
3469
3470         return FALSE;
3471 }
3472
3473 static gboolean
3474 ev_view_button_release_event (GtkWidget      *widget,
3475                               GdkEventButton *event)
3476 {
3477         EvView *view = EV_VIEW (widget);
3478         EvLink *link = NULL;
3479
3480         view->image_dnd_info.in_drag = FALSE;
3481
3482         if (view->scroll_info.autoscrolling) {
3483                 ev_view_autoscroll_stop (view);
3484                 view->pressed_button = -1;
3485
3486                 return TRUE;
3487         }
3488
3489         if (view->drag_info.in_drag) {
3490                 view->drag_info.release_timeout_id =
3491                         g_timeout_add (20,
3492                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3493         }
3494
3495         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3496                 link = ev_view_get_link_at_location (view, event->x, event->y);
3497         }
3498
3499         view->drag_info.in_drag = FALSE;
3500
3501         if (view->pressed_button == 2) {
3502                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3503         }
3504
3505         view->pressed_button = -1;
3506
3507         if (view->selection_scroll_id) {
3508             g_source_remove (view->selection_scroll_id);
3509             view->selection_scroll_id = 0;
3510         }
3511         if (view->selection_update_id) {
3512             g_source_remove (view->selection_update_id);
3513             view->selection_update_id = 0;
3514         }
3515
3516         if (!view->selection_info.in_selection &&
3517             view->selection_info.style != EV_SELECTION_STYLE_GLYPH) {
3518                 compute_selections (view,
3519                                     view->selection_info.style,
3520                                     &(view->selection_info.start),
3521                                     &(view->selection_info.start));
3522         }
3523
3524         if (view->selection_info.selections) {
3525                 clear_link_selected (view);
3526                 ev_view_update_primary_selection (view);
3527
3528                 if (view->selection_info.in_drag) {
3529                         clear_selection (view);
3530                         gtk_widget_queue_draw (widget);
3531                 }
3532
3533                 view->selection_info.in_drag = FALSE;
3534         } else if (link) {
3535                 if (event->button == 2) {
3536                         EvLinkAction    *action;
3537                         EvLinkActionType type;
3538
3539                         action = ev_link_get_action (link);
3540                         if (!action)
3541                                 return FALSE;
3542
3543                         type = ev_link_action_get_action_type (action);
3544                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3545                                 g_signal_emit (view,
3546                                                signals[SIGNAL_EXTERNAL_LINK],
3547                                                0, action);
3548                         }
3549                 } else {
3550                         ev_view_handle_link (view, link);
3551                 }
3552         } else if (view->presentation) {
3553                 switch (event->button) {
3554                         case 1:
3555                                 ev_view_next_page (view);
3556                                 return TRUE;
3557                         case 3:
3558                                 ev_view_previous_page (view);
3559                                 return TRUE;
3560                 }
3561         }
3562
3563         return FALSE;
3564 }
3565
3566 /* Goto Window */
3567 /* Cut and paste from gtkwindow.c */
3568 static void
3569 send_focus_change (GtkWidget *widget,
3570                    gboolean   in)
3571 {
3572         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3573
3574         g_object_ref (widget);
3575
3576         if (in)
3577                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3578         else
3579                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3580
3581         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3582         fevent->focus_change.window = g_object_ref (widget->window);
3583         fevent->focus_change.in = in;
3584
3585         gtk_widget_event (widget, fevent);
3586
3587         g_object_notify (G_OBJECT (widget), "has-focus");
3588
3589         g_object_unref (widget);
3590         gdk_event_free (fevent);
3591 }
3592
3593 static void
3594 ev_view_goto_window_hide (EvView *view)
3595 {
3596         /* send focus-in event */
3597         send_focus_change (view->goto_entry, FALSE);
3598         gtk_widget_hide (view->goto_window);
3599         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3600 }
3601
3602 static gboolean
3603 ev_view_goto_window_delete_event (GtkWidget   *widget,
3604                                   GdkEventAny *event,
3605                                   EvView      *view)
3606 {
3607         ev_view_goto_window_hide (view);
3608
3609         return TRUE;
3610 }
3611
3612 static gboolean
3613 key_is_numeric (guint keyval)
3614 {
3615         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3616                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3617 }
3618
3619 static gboolean
3620 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3621                                      GdkEventKey *event,
3622                                      EvView      *view)
3623 {
3624         switch (event->keyval) {
3625                 case GDK_Escape:
3626                 case GDK_Tab:
3627                 case GDK_KP_Tab:
3628                 case GDK_ISO_Left_Tab:
3629                         ev_view_goto_window_hide (view);
3630                         return TRUE;
3631                 case GDK_Return:
3632                 case GDK_KP_Enter:
3633                 case GDK_ISO_Enter:
3634                 case GDK_BackSpace:
3635                 case GDK_Delete:
3636                         return FALSE;
3637                 default:
3638                         if (!key_is_numeric (event->keyval))
3639                                 return TRUE;
3640         }
3641
3642         return FALSE;
3643 }
3644
3645 static gboolean
3646 ev_view_goto_window_button_press_event (GtkWidget      *widget,
3647                                         GdkEventButton *event,
3648                                         EvView         *view)
3649 {
3650         ev_view_goto_window_hide (view);
3651
3652         return TRUE;
3653 }
3654
3655 static void
3656 ev_view_goto_entry_activate (GtkEntry *entry,
3657                              EvView   *view)
3658 {
3659         const gchar *text;
3660         gint         page;
3661
3662         text = gtk_entry_get_text (entry);
3663         page = atoi (text) - 1;
3664
3665         ev_view_goto_window_hide (view);
3666
3667         if (page >= 0 &&
3668             page < ev_page_cache_get_n_pages (view->page_cache))
3669                 ev_page_cache_set_current_page (view->page_cache, page);
3670 }
3671
3672 static void
3673 ev_view_goto_window_create (EvView *view)
3674 {
3675         GtkWidget *frame, *hbox, *toplevel, *label;
3676
3677         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
3678
3679         if (view->goto_window) {
3680                 if (GTK_WINDOW (toplevel)->group)
3681                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3682                                                      GTK_WINDOW (view->goto_window));
3683                 else if (GTK_WINDOW (view->goto_window)->group)
3684                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
3685                                                         GTK_WINDOW (view->goto_window));
3686                 return;
3687         }
3688
3689         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
3690         gtk_window_set_screen (GTK_WINDOW (view->goto_window),
3691                                gtk_widget_get_screen (GTK_WIDGET (view)));
3692
3693         if (GTK_WINDOW (toplevel)->group)
3694                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3695                                              GTK_WINDOW (view->goto_window));
3696
3697         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
3698
3699         g_signal_connect (view->goto_window, "delete_event",
3700                           G_CALLBACK (ev_view_goto_window_delete_event),
3701                           view);
3702         g_signal_connect (view->goto_window, "key_press_event",
3703                           G_CALLBACK (ev_view_goto_window_key_press_event),
3704                           view);
3705         g_signal_connect (view->goto_window, "button_press_event",
3706                           G_CALLBACK (ev_view_goto_window_button_press_event),
3707                           view);
3708
3709         frame = gtk_frame_new (NULL);
3710         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
3711         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
3712         gtk_widget_show (frame);
3713
3714         hbox = gtk_hbox_new (FALSE, 0);
3715         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
3716         gtk_container_add (GTK_CONTAINER (frame), hbox);
3717         gtk_widget_show (hbox);
3718
3719         label = gtk_label_new(_("Jump to page:"));
3720         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
3721         gtk_widget_show (label);
3722         gtk_widget_realize (label);
3723
3724         view->goto_entry = gtk_entry_new ();
3725         g_signal_connect (view->goto_entry, "activate",
3726                           G_CALLBACK (ev_view_goto_entry_activate),
3727                           view);
3728         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
3729         gtk_widget_show (view->goto_entry);
3730         gtk_widget_realize (view->goto_entry);
3731 }
3732
3733 static void
3734 ev_view_goto_entry_grab_focus (EvView *view)
3735 {
3736         GtkWidgetClass *entry_parent_class;
3737
3738         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
3739         (entry_parent_class->grab_focus) (view->goto_entry);
3740
3741         send_focus_change (view->goto_entry, TRUE);
3742 }
3743
3744 static void
3745 ev_view_goto_window_send_key_event (EvView   *view,
3746                                     GdkEvent *event)
3747 {
3748         GdkEventKey *new_event;
3749         GdkScreen   *screen;
3750
3751         /* Move goto window off screen */
3752         screen = gtk_widget_get_screen (GTK_WIDGET (view));
3753         gtk_window_move (GTK_WINDOW (view->goto_window),
3754                          gdk_screen_get_width (screen) + 1,
3755                          gdk_screen_get_height (screen) + 1);
3756         gtk_widget_show (view->goto_window);
3757
3758         new_event = (GdkEventKey *) gdk_event_copy (event);
3759         g_object_unref (new_event->window);
3760         new_event->window = g_object_ref (view->goto_window->window);
3761         gtk_widget_realize (view->goto_window);
3762
3763         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
3764         gdk_event_free ((GdkEvent *)new_event);
3765         gtk_widget_hide (view->goto_window);
3766 }
3767
3768 static gboolean
3769 ev_view_key_press_event (GtkWidget   *widget,
3770                          GdkEventKey *event)
3771 {
3772         EvView *view = EV_VIEW (widget);
3773         EvPresentationState current;
3774
3775         if (!view->document)
3776                 return FALSE;
3777
3778         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3779                 /* Forward key events to current focused window child */
3780                 if (view->window_child_focus) {
3781                         GdkEventKey *new_event;
3782                         gboolean     handled;
3783
3784                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
3785                         g_object_unref (new_event->window);
3786                         new_event->window = g_object_ref (view->window_child_focus->window->window);
3787                         gtk_widget_realize (view->window_child_focus->window);
3788                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
3789                         gdk_event_free ((GdkEvent *)new_event);
3790
3791                         return handled;
3792                 }
3793
3794                 return FALSE;
3795         }
3796
3797         if (!view->presentation ||
3798             view->presentation_state == EV_PRESENTATION_END)
3799                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3800
3801
3802         current = view->presentation_state;
3803
3804         switch (event->keyval) {
3805                 case GDK_b:
3806                 case GDK_B:
3807                 case GDK_period:
3808                 case GDK_KP_Decimal:
3809                         view->presentation_state =
3810                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
3811                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
3812                         break;
3813                 case GDK_w:
3814                 case GDK_W:
3815                         view->presentation_state =
3816                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
3817                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
3818                         break;
3819                 default:
3820                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
3821                             view->presentation_state == EV_PRESENTATION_WHITE) {
3822                                 view->presentation_state = EV_PRESENTATION_NORMAL;
3823                         }
3824         }
3825
3826         if (current == view->presentation_state) {
3827                 if (ev_page_cache_get_n_pages (view->page_cache) > 1 &&
3828                     key_is_numeric (event->keyval)) {
3829                         gint x, y;
3830
3831                         ev_view_goto_window_create (view);
3832                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
3833                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
3834                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
3835                         gtk_widget_show (view->goto_window);
3836                         ev_view_goto_entry_grab_focus (view);
3837
3838                         return TRUE;
3839                 }
3840
3841                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3842         }
3843
3844         switch (view->presentation_state) {
3845                 case EV_PRESENTATION_NORMAL:
3846                 case EV_PRESENTATION_BLACK:
3847                         gdk_window_set_background (view->layout.bin_window,
3848                                                    &widget->style->black);
3849                         break;
3850                 case EV_PRESENTATION_WHITE:
3851                         gdk_window_set_background (view->layout.bin_window,
3852                                                    &widget->style->white);
3853                         break;
3854                 default:
3855                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3856         }
3857
3858         gtk_widget_queue_draw (widget);
3859         return TRUE;
3860 }
3861
3862 static gint
3863 ev_view_focus_in (GtkWidget     *widget,
3864                   GdkEventFocus *event)
3865 {
3866         if (EV_VIEW (widget)->pixbuf_cache)
3867                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3868         gtk_widget_queue_draw (widget);
3869
3870         return FALSE;
3871 }
3872
3873 static gint
3874 ev_view_focus_out (GtkWidget     *widget,
3875                      GdkEventFocus *event)
3876 {
3877         if (EV_VIEW (widget)->goto_window)
3878                 ev_view_goto_window_hide (EV_VIEW (widget));
3879
3880         if (EV_VIEW (widget)->pixbuf_cache)
3881                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3882         gtk_widget_queue_draw (widget);
3883
3884         return FALSE;
3885 }
3886
3887 static gboolean
3888 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3889 {
3890         EvView *view = EV_VIEW (widget);
3891
3892         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
3893                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3894
3895         return FALSE;
3896 }
3897
3898 static gboolean
3899 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3900 {
3901         EvView *view = EV_VIEW (widget);
3902
3903         ev_view_handle_cursor_over_xy (view, event->x, event->y);
3904
3905         return FALSE;
3906 }
3907
3908 static void
3909 ev_view_style_set (GtkWidget *widget,
3910                    GtkStyle  *old_style)
3911 {
3912         if (EV_VIEW (widget)->pixbuf_cache)
3913                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3914
3915         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
3916 }
3917
3918 /*** Drawing ***/
3919
3920 static guint32
3921 ev_gdk_color_to_rgb (const GdkColor *color)
3922 {
3923   guint32 result;
3924   result = (0xff0000 | (color->red & 0xff00));
3925   result <<= 8;
3926   result |= ((color->green & 0xff00) | (color->blue >> 8));
3927   return result;
3928 }
3929
3930 static void
3931 draw_rubberband (GtkWidget *widget, GdkWindow *window,
3932                  const GdkRectangle *rect, guchar alpha)
3933 {
3934         GdkGC *gc;
3935         GdkPixbuf *pixbuf;
3936         GdkColor *fill_color_gdk;
3937         guint fill_color;
3938
3939         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
3940         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
3941
3942         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
3943                                  rect->width, rect->height);
3944         gdk_pixbuf_fill (pixbuf, fill_color);
3945
3946         gdk_draw_pixbuf (window, NULL, pixbuf,
3947                          0, 0,
3948                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3949                          rect->width, rect->height,
3950                          GDK_RGB_DITHER_NONE,
3951                          0, 0);
3952
3953         g_object_unref (pixbuf);
3954
3955         gc = gdk_gc_new (window);
3956         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
3957         gdk_draw_rectangle (window, gc, FALSE,
3958                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3959                             rect->width - 1,
3960                             rect->height - 1);
3961         g_object_unref (gc);
3962
3963         gdk_color_free (fill_color_gdk);
3964 }
3965
3966
3967 static void
3968 highlight_find_results (EvView *view, int page)
3969 {
3970         gint i, n_results = 0;
3971
3972         n_results = ev_view_find_get_n_results (view, page);
3973
3974         for (i = 0; i < n_results; i++) {
3975                 EvRectangle *rectangle;
3976                 GdkRectangle view_rectangle;
3977                 guchar alpha;
3978
3979                 if (i == view->find_result && page == view->current_page) {
3980                         alpha = 0x90;
3981                 } else {
3982                         alpha = 0x20;
3983                 }
3984
3985                 rectangle = ev_view_find_get_result (view, page, i);
3986                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
3987                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
3988                                  &view_rectangle, alpha);
3989         }
3990 }
3991
3992 static void
3993 draw_loading_text (EvView       *view,
3994                    GdkRectangle *page_area,
3995                    GdkRectangle *expose_area)
3996 {
3997         cairo_t *cr;
3998         gint     width, height;
3999
4000         if (!view->loading_text) {
4001                 const gchar *loading_text = _("Loading...");
4002                 PangoLayout *layout;
4003                 PangoFontDescription *font_desc;
4004                 PangoRectangle logical_rect;
4005                 gint target_width;
4006                 gdouble real_scale;
4007
4008                 ev_document_fc_mutex_lock ();
4009
4010                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
4011
4012                 font_desc = pango_font_description_new ();
4013
4014                 /* We set the font to be 10 points, get the size, and scale appropriately */
4015                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
4016                 pango_layout_set_font_description (layout, font_desc);
4017                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4018
4019                 target_width = MAX (page_area->width / 2, 1);
4020                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
4021                 pango_font_description_set_size (font_desc, (int)real_scale);
4022                 pango_layout_set_font_description (layout, font_desc);
4023                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4024
4025                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
4026                                                                  logical_rect.width,
4027                                                                  logical_rect.height);
4028                 cr = cairo_create (view->loading_text);
4029                 cairo_set_source_rgb (cr,
4030                                       155 / (double)255,
4031                                       155 / (double)255,
4032                                       155 / (double)255);
4033                 pango_cairo_show_layout (cr, layout);
4034                 cairo_destroy (cr);
4035
4036                 pango_font_description_free (font_desc);
4037                 g_object_unref (layout);
4038
4039                 ev_document_fc_mutex_unlock ();
4040         }
4041
4042         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
4043         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
4044
4045         cr = gdk_cairo_create (view->layout.bin_window);
4046         cairo_translate (cr,
4047                          page_area->x + width,
4048                          page_area->y + height);
4049         cairo_set_source_surface (cr, view->loading_text, 0, 0);
4050         cairo_paint (cr);
4051         cairo_destroy (cr);
4052 }
4053
4054 static void
4055 draw_one_page (EvView       *view,
4056                gint          page,
4057                cairo_t      *cr,
4058                GdkRectangle *page_area,
4059                GtkBorder    *border,
4060                GdkRectangle *expose_area,
4061                gboolean     *page_ready)
4062 {
4063         GdkRectangle overlap;
4064         GdkRectangle real_page_area;
4065
4066         g_assert (view->document);
4067
4068         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4069                 return;
4070
4071         /* Render the document itself */
4072         real_page_area = *page_area;
4073
4074         real_page_area.x += border->left;
4075         real_page_area.y += border->top;
4076         real_page_area.width -= (border->left + border->right);
4077         real_page_area.height -= (border->top + border->bottom);
4078         *page_ready = TRUE;
4079
4080         if (!view->presentation) {
4081                 gint current_page;
4082
4083                 current_page = ev_page_cache_get_current_page (view->page_cache);
4084                 ev_document_misc_paint_one_page (view->layout.bin_window,
4085                                                  GTK_WIDGET (view),
4086                                                  page_area, border,
4087                                                  page == current_page);
4088         }
4089
4090         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4091                 gint             width, height;
4092                 gint             page_width, page_height;
4093                 cairo_surface_t *page_surface = NULL;
4094                 gint             selection_width, selection_height;
4095                 cairo_surface_t *selection_surface = NULL;
4096
4097                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4098
4099                 if (!page_surface) {
4100                         if (!view->presentation) {
4101                                 draw_loading_text (view,
4102                                                    &real_page_area,
4103                                                    expose_area);
4104                         }
4105
4106                         *page_ready = FALSE;
4107
4108                         return;
4109                 }
4110
4111                 ev_page_cache_get_size (view->page_cache,
4112                                         page, view->rotation,
4113                                         view->scale,
4114                                         &width, &height);
4115
4116                 page_width = cairo_image_surface_get_width (page_surface);
4117                 page_height = cairo_image_surface_get_height (page_surface);
4118
4119                 cairo_save (cr);
4120                 cairo_translate (cr, overlap.x, overlap.y);
4121
4122                 if (width != page_width || height != page_height) {
4123                         cairo_pattern_set_filter (cairo_get_source (cr),
4124                                                   CAIRO_FILTER_FAST);
4125                         cairo_scale (cr,
4126                                      (gdouble)width / page_width,
4127                                      (gdouble)height / page_height);
4128                 }
4129
4130                 cairo_surface_set_device_offset (page_surface,
4131                                                  overlap.x - real_page_area.x,
4132                                                  overlap.y - real_page_area.y);
4133                 cairo_set_source_surface (cr, page_surface, 0, 0);
4134                 cairo_paint (cr);
4135                 cairo_restore (cr);
4136
4137                 /* Get the selection pixbuf iff we have something to draw */
4138                 if (find_selection_for_page (view, page) &&
4139                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4140                         selection_surface =
4141                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4142                                                                        page,
4143                                                                        view->scale,
4144                                                                        NULL);
4145                 }
4146
4147                 if (!selection_surface) {
4148                         return;
4149                 }
4150
4151                 selection_width = cairo_image_surface_get_width (selection_surface);
4152                 selection_height = cairo_image_surface_get_height (selection_surface);
4153
4154                 cairo_save (cr);
4155                 cairo_translate (cr, overlap.x, overlap.y);
4156
4157                 if (width != selection_width || height != selection_height) {
4158                         cairo_pattern_set_filter (cairo_get_source (cr),
4159                                                   CAIRO_FILTER_FAST);
4160                         cairo_scale (cr,
4161                                      (gdouble)width / selection_width,
4162                                      (gdouble)height / selection_height);
4163                 }
4164
4165                 cairo_surface_set_device_offset (selection_surface,
4166                                                  overlap.x - real_page_area.x,
4167                                                  overlap.y - real_page_area.y);
4168                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4169                 cairo_paint (cr);
4170                 cairo_restore (cr);
4171         }
4172 }
4173
4174 /*** GObject functions ***/
4175
4176 static void
4177 ev_view_finalize (GObject *object)
4178 {
4179         EvView *view = EV_VIEW (object);
4180
4181         clear_selection (view);
4182         clear_link_selected (view);
4183
4184         if (view->image_dnd_info.image)
4185                 g_object_unref (view->image_dnd_info.image);
4186         view->image_dnd_info.image = NULL;
4187
4188         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4189 }
4190
4191 static void
4192 ev_view_destroy (GtkObject *object)
4193 {
4194         EvView *view = EV_VIEW (object);
4195
4196         if (view->document) {
4197                 g_object_unref (view->document);
4198                 view->document = NULL;
4199         }
4200
4201         if (view->pixbuf_cache) {
4202                 g_object_unref (view->pixbuf_cache);
4203                 view->pixbuf_cache = NULL;
4204         }
4205
4206         if (view->goto_window) {
4207                 gtk_widget_destroy (view->goto_window);
4208                 view->goto_window = NULL;
4209                 view->goto_entry = NULL;
4210         }
4211
4212         ev_view_window_children_free (view);
4213
4214         if (view->selection_scroll_id) {
4215             g_source_remove (view->selection_scroll_id);
4216             view->selection_scroll_id = 0;
4217         }
4218
4219         if (view->selection_update_id) {
4220             g_source_remove (view->selection_update_id);
4221             view->selection_update_id = 0;
4222         }
4223
4224         if (view->loading_text) {
4225                 cairo_surface_destroy (view->loading_text);
4226                 view->loading_text = NULL;
4227         }
4228
4229         if (view->scroll_info.timeout_id) {
4230             g_source_remove (view->scroll_info.timeout_id);
4231             view->scroll_info.timeout_id = 0;
4232         }
4233
4234         if (view->drag_info.drag_timeout_id) {
4235                 g_source_remove (view->drag_info.drag_timeout_id);
4236                 view->drag_info.drag_timeout_id = 0;
4237         }
4238
4239         if (view->drag_info.release_timeout_id) {
4240                 g_source_remove (view->drag_info.release_timeout_id);
4241                 view->drag_info.release_timeout_id = 0;
4242         }
4243
4244         ev_view_presentation_transition_stop (view);
4245
4246         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4247
4248         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4249 }
4250
4251 static void
4252 ev_view_set_property (GObject      *object,
4253                       guint         prop_id,
4254                       const GValue *value,
4255                       GParamSpec   *pspec)
4256 {
4257         EvView *view = EV_VIEW (object);
4258
4259         switch (prop_id) {
4260                 case PROP_CONTINUOUS:
4261                         ev_view_set_continuous (view, g_value_get_boolean (value));
4262                         break;
4263                 case PROP_DUAL_PAGE:
4264                         ev_view_set_dual_page (view, g_value_get_boolean (value));
4265                         break;
4266                 case PROP_FULLSCREEN:
4267                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
4268                         break;
4269                 case PROP_PRESENTATION:
4270                         ev_view_set_presentation (view, g_value_get_boolean (value));
4271                         break;
4272                 case PROP_SIZING_MODE:
4273                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
4274                         break;
4275                 case PROP_ZOOM:
4276                         ev_view_set_zoom (view, g_value_get_double (value), FALSE);
4277                         break;
4278                 case PROP_ROTATION:
4279                         ev_view_set_rotation (view, g_value_get_int (value));
4280                         break;
4281                 default:
4282                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4283         }
4284 }
4285
4286 static AtkObject *
4287 ev_view_get_accessible (GtkWidget *widget)
4288 {
4289         static gboolean first_time = TRUE;
4290
4291         if (first_time) {
4292                 AtkObjectFactory *factory;
4293                 AtkRegistry *registry;
4294                 GType derived_type;
4295                 GType derived_atk_type;
4296
4297                 /*
4298                  * Figure out whether accessibility is enabled by looking at the
4299                  * type of the accessible object which would be created for
4300                  * the parent type of EvView.
4301                  */
4302                 derived_type = g_type_parent (EV_TYPE_VIEW);
4303
4304                 registry = atk_get_default_registry ();
4305                 factory = atk_registry_get_factory (registry,
4306                                                     derived_type);
4307                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4308                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4309                         atk_registry_set_factory_type (registry,
4310                                                        EV_TYPE_VIEW,
4311                                                        ev_view_accessible_factory_get_type ());
4312                 first_time = FALSE;
4313         }
4314         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4315 }
4316
4317 static void
4318 ev_view_get_property (GObject *object,
4319                       guint prop_id,
4320                       GValue *value,
4321                       GParamSpec *pspec)
4322 {
4323         EvView *view = EV_VIEW (object);
4324
4325         switch (prop_id) {
4326                 case PROP_CONTINUOUS:
4327                         g_value_set_boolean (value, view->continuous);
4328                         break;
4329                 case PROP_DUAL_PAGE:
4330                         g_value_set_boolean (value, view->dual_page);
4331                         break;
4332                 case PROP_FULLSCREEN:
4333                         g_value_set_boolean (value, view->fullscreen);
4334                         break;
4335                 case PROP_PRESENTATION:
4336                         g_value_set_boolean (value, view->presentation);
4337                         break;
4338                 case PROP_SIZING_MODE:
4339                         g_value_set_enum (value, view->sizing_mode);
4340                         break;
4341                 case PROP_ZOOM:
4342                         g_value_set_double (value, view->scale);
4343                         break;
4344                 case PROP_ROTATION:
4345                         g_value_set_int (value, view->rotation);
4346                         break;
4347                 case PROP_HAS_SELECTION:
4348                         g_value_set_boolean (value,
4349                                              view->selection_info.selections != NULL);
4350                         break;
4351                 default:
4352                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4353         }
4354 }
4355
4356 static void
4357 ev_view_class_init (EvViewClass *class)
4358 {
4359         GObjectClass *object_class = G_OBJECT_CLASS (class);
4360         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4361         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4362         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4363         GtkBindingSet *binding_set;
4364
4365         object_class->finalize = ev_view_finalize;
4366         object_class->set_property = ev_view_set_property;
4367         object_class->get_property = ev_view_get_property;
4368
4369         widget_class->expose_event = ev_view_expose_event;
4370         widget_class->button_press_event = ev_view_button_press_event;
4371         widget_class->motion_notify_event = ev_view_motion_notify_event;
4372         widget_class->button_release_event = ev_view_button_release_event;
4373         widget_class->key_press_event = ev_view_key_press_event;
4374         widget_class->focus_in_event = ev_view_focus_in;
4375         widget_class->focus_out_event = ev_view_focus_out;
4376         widget_class->get_accessible = ev_view_get_accessible;
4377         widget_class->size_request = ev_view_size_request;
4378         widget_class->size_allocate = ev_view_size_allocate;
4379         widget_class->realize = ev_view_realize;
4380         widget_class->scroll_event = ev_view_scroll_event;
4381         widget_class->enter_notify_event = ev_view_enter_notify_event;
4382         widget_class->leave_notify_event = ev_view_leave_notify_event;
4383         widget_class->style_set = ev_view_style_set;
4384         widget_class->drag_data_get = ev_view_drag_data_get;
4385         widget_class->drag_motion = ev_view_drag_motion;
4386         widget_class->popup_menu = ev_view_popup_menu;
4387         widget_class->query_tooltip = ev_view_query_tooltip;
4388
4389         gtk_object_class->destroy = ev_view_destroy;
4390
4391         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4392
4393         class->binding_activated = ev_view_scroll;
4394
4395         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4396                          G_TYPE_FROM_CLASS (object_class),
4397                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4398                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4399                          NULL, NULL,
4400                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4401                          G_TYPE_NONE, 2,
4402                          GTK_TYPE_SCROLL_TYPE,
4403                          G_TYPE_BOOLEAN);
4404
4405         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
4406                          G_TYPE_FROM_CLASS (object_class),
4407                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4408                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
4409                          NULL, NULL,
4410                          g_cclosure_marshal_VOID__VOID,
4411                          G_TYPE_NONE, 0, G_TYPE_NONE);
4412         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4413                          G_TYPE_FROM_CLASS (object_class),
4414                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4415                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4416                          NULL, NULL,
4417                          g_cclosure_marshal_VOID__OBJECT,
4418                          G_TYPE_NONE, 1,
4419                          G_TYPE_OBJECT);
4420         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4421                          G_TYPE_FROM_CLASS (object_class),
4422                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4423                          G_STRUCT_OFFSET (EvViewClass, external_link),
4424                          NULL, NULL,
4425                          g_cclosure_marshal_VOID__OBJECT,
4426                          G_TYPE_NONE, 1,
4427                          G_TYPE_OBJECT);
4428         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4429                          G_TYPE_FROM_CLASS (object_class),
4430                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4431                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4432                          NULL, NULL,
4433                          g_cclosure_marshal_VOID__OBJECT,
4434                          G_TYPE_NONE, 1,
4435                          G_TYPE_OBJECT);
4436
4437
4438         g_object_class_install_property (object_class,
4439                                          PROP_CONTINUOUS,
4440                                          g_param_spec_boolean ("continuous",
4441                                                                "Continuous",
4442                                                                "Continuous scrolling mode",
4443                                                                TRUE,
4444                                                                G_PARAM_READWRITE));
4445
4446         g_object_class_install_property (object_class,
4447                                          PROP_DUAL_PAGE,
4448                                          g_param_spec_boolean ("dual-page",
4449                                                                "Dual Page",
4450                                                                "Two pages visible at once",
4451                                                                FALSE,
4452                                                                G_PARAM_READWRITE));
4453         g_object_class_install_property (object_class,
4454                                          PROP_FULLSCREEN,
4455                                          g_param_spec_boolean ("fullscreen",
4456                                                                "Full Screen",
4457                                                                "Draw page in a fullscreen fashion",
4458                                                                FALSE,
4459                                                                G_PARAM_READWRITE));
4460         g_object_class_install_property (object_class,
4461                                          PROP_PRESENTATION,
4462                                          g_param_spec_boolean ("presentation",
4463                                                                "Presentation",
4464                                                                "Draw page in presentation mode",
4465                                                                TRUE,
4466                                                                G_PARAM_READWRITE));
4467
4468         g_object_class_install_property (object_class,
4469                                          PROP_SIZING_MODE,
4470                                          g_param_spec_enum ("sizing-mode",
4471                                                             "Sizing Mode",
4472                                                             "Sizing Mode",
4473                                                             EV_TYPE_SIZING_MODE,
4474                                                             EV_SIZING_FIT_WIDTH,
4475                                                             G_PARAM_READWRITE));
4476
4477         g_object_class_install_property (object_class,
4478                                          PROP_ZOOM,
4479                                          g_param_spec_double ("zoom",
4480                                                               "Zoom factor",
4481                                                               "Zoom factor",
4482                                                               0,
4483                                                               G_MAXDOUBLE,
4484                                                               1.0,
4485                                                               G_PARAM_READWRITE));
4486         g_object_class_install_property (object_class,
4487                                          PROP_ROTATION,
4488                                          g_param_spec_double ("rotation",
4489                                                               "Rotation",
4490                                                               "Rotation",
4491                                                               0,
4492                                                               360,
4493                                                               0,
4494                                                               G_PARAM_READWRITE));
4495         g_object_class_install_property (object_class,
4496                                          PROP_HAS_SELECTION,
4497                                          g_param_spec_boolean ("has-selection",
4498                                                                "Has selection",
4499                                                                "The view has selections",
4500                                                                FALSE,
4501                                                                G_PARAM_READABLE));
4502
4503         binding_set = gtk_binding_set_by_class (class);
4504
4505         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4506         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4507         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4508         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4509         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4510         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4511         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4512         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4513         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4514                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4515         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4516                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4517         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4518                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4519         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4520                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4521
4522 }
4523
4524 static void
4525 ev_view_init (EvView *view)
4526 {
4527         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4528
4529         view->start_page = -1;
4530         view->end_page = -1;
4531         view->spacing = 5;
4532         view->scale = 1.0;
4533         view->current_page = 0;
4534         view->pressed_button = -1;
4535         view->cursor = EV_VIEW_CURSOR_NORMAL;
4536         view->drag_info.in_drag = FALSE;
4537         view->scroll_info.autoscrolling = FALSE;
4538         view->selection_info.selections = NULL;
4539         view->selection_info.in_selection = FALSE;
4540         view->selection_info.in_drag = FALSE;
4541         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4542         view->continuous = TRUE;
4543         view->dual_page = FALSE;
4544         view->presentation = FALSE;
4545         view->presentation_state = EV_PRESENTATION_NORMAL;
4546         view->fullscreen = FALSE;
4547         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4548         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4549         view->jump_to_find_result = TRUE;
4550         view->highlight_find_results = FALSE;
4551
4552         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4553         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4554 }
4555
4556 /*** Callbacks ***/
4557
4558 static void
4559 ev_view_change_page (EvView *view,
4560                      gint    new_page,
4561                      gboolean start_transition)
4562 {
4563         gint x, y;
4564
4565         view->current_page = new_page;
4566         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4567
4568         if (view->presentation && start_transition)
4569                 ev_view_presentation_transition_start (view);
4570
4571         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4572         ev_view_handle_cursor_over_xy (view, x, y);
4573
4574         gtk_widget_queue_resize (GTK_WIDGET (view));
4575 }
4576
4577 static void
4578 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4579                                      EvView                *view)
4580 {
4581         g_object_unref (view->animation);
4582         view->animation = NULL;
4583         ev_view_change_page (view, view->current_page, TRUE);
4584 }
4585
4586 /**
4587  * ev_view_transition_animation_cancel:
4588  * @animation: Animation to finish
4589  * @view: An EvView
4590  *
4591  * Does almost the same as cancel, but without scheduling the transition.
4592  */
4593
4594 static void
4595 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4596                                      EvView                *view)
4597 {
4598         g_object_unref (view->animation);
4599         view->animation = NULL;
4600         ev_view_change_page (view, view->current_page, FALSE);
4601 }
4602
4603 static void
4604 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4605                                     gdouble                progress,
4606                                     EvView                *view)
4607 {
4608         gtk_widget_queue_draw (GTK_WIDGET (view));
4609 }
4610
4611 static void
4612 ev_view_presentation_animation_start (EvView *view,
4613                                       int     new_page)
4614 {
4615         EvTransitionEffect *effect = NULL;
4616         cairo_surface_t *surface;
4617
4618         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4619                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4620                                                             view->current_page);
4621         if (!effect)
4622                 return;
4623
4624         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4625         view->animation = ev_transition_animation_new (effect);
4626         ev_transition_animation_set_origin_surface (view->animation, surface);
4627
4628         g_signal_connect (view->animation, "frame",
4629                           G_CALLBACK (ev_view_transition_animation_frame), view);
4630         g_signal_connect (view->animation, "finished",
4631                           G_CALLBACK (ev_view_transition_animation_finish), view);
4632 }
4633
4634 static void
4635 job_finished_cb (EvPixbufCache *pixbuf_cache,
4636                  GdkRegion     *region,
4637                  EvView        *view)
4638 {
4639         if (view->animation) {
4640                 cairo_surface_t *surface;
4641
4642                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4643                 ev_transition_animation_set_dest_surface (view->animation, surface);
4644         }
4645
4646         if (region) {
4647                 gdk_window_invalidate_region (view->layout.bin_window,
4648                                               region, TRUE);
4649         } else {
4650                 gtk_widget_queue_draw (GTK_WIDGET (view));
4651         }
4652 }
4653
4654 static void
4655 page_changed_cb (EvPageCache *page_cache,
4656                  int          new_page,
4657                  EvView      *view)
4658 {
4659         if (view->current_page != new_page) {
4660                 if (view->presentation)
4661                         ev_view_presentation_animation_start (view, new_page);
4662
4663                 ev_view_change_page (view, new_page, TRUE);
4664         } else {
4665                 gtk_widget_queue_draw (GTK_WIDGET (view));
4666         }
4667
4668         view->find_result = 0;
4669 }
4670
4671 static void
4672 on_adjustment_value_changed (GtkAdjustment *adjustment,
4673                              EvView        *view)
4674 {
4675         int dx = 0, dy = 0;
4676         gint x, y;
4677         GList *children, *l;
4678
4679         if (! GTK_WIDGET_REALIZED (view))
4680                 return;
4681
4682         if (view->hadjustment) {
4683                 dx = view->scroll_x - (int) view->hadjustment->value;
4684                 view->scroll_x = (int) view->hadjustment->value;
4685         } else {
4686                 view->scroll_x = 0;
4687         }
4688
4689         if (view->vadjustment) {
4690                 dy = view->scroll_y - (int) view->vadjustment->value;
4691                 view->scroll_y = (int) view->vadjustment->value;
4692         } else {
4693                 view->scroll_y = 0;
4694         }
4695
4696         children = gtk_container_get_children (GTK_CONTAINER (view));
4697         for (l = children; l && l->data; l = g_list_next (l)) {
4698                 gint       child_x, child_y;
4699                 GtkWidget *child = (GtkWidget *)l->data;
4700
4701                 gtk_container_child_get (GTK_CONTAINER (view),
4702                                          child,
4703                                          "x", &child_x,
4704                                          "y", &child_y,
4705                                          NULL);
4706                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4707         }
4708         g_list_free (children);
4709
4710         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4711                 EvViewWindowChild *child;
4712
4713                 child = (EvViewWindowChild *)l->data;
4714
4715                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4716         }
4717
4718         if (view->pending_resize)
4719                 gtk_widget_queue_draw (GTK_WIDGET (view));
4720         else
4721                 gdk_window_scroll (view->layout.bin_window, dx, dy);
4722
4723         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4724         ev_view_handle_cursor_over_xy (view, x, y);
4725
4726         if (view->document)
4727                 view_update_range_and_current_page (view);
4728 }
4729
4730 GtkWidget*
4731 ev_view_new (void)
4732 {
4733         GtkWidget *view;
4734
4735         view = g_object_new (EV_TYPE_VIEW, NULL);
4736
4737         return view;
4738 }
4739
4740 static void
4741 setup_caches (EvView *view)
4742 {
4743         view->page_cache = ev_page_cache_get (view->document);
4744         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
4745         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
4746         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4747         page_changed_cb (view->page_cache,
4748                          ev_page_cache_get_current_page (view->page_cache),
4749                          view);
4750 }
4751
4752 static void
4753 clear_caches (EvView *view)
4754 {
4755         if (view->pixbuf_cache) {
4756                 g_object_unref (view->pixbuf_cache);
4757                 view->pixbuf_cache = NULL;
4758         }
4759
4760         if (view->page_cache) {
4761                 view->page_cache = NULL;
4762         }
4763 }
4764
4765 void
4766 ev_view_set_loading (EvView       *view,
4767                      gboolean      loading)
4768 {
4769         view->loading = loading;
4770         gtk_widget_queue_draw (GTK_WIDGET (view));
4771 }
4772
4773 static gboolean
4774 ev_view_autoscroll_cb (EvView *view)
4775 {
4776         gdouble speed, value;
4777
4778         /* If the user stops autoscrolling, autoscrolling will be
4779          * set to false but the timeout will continue; stop the timeout: */
4780         if (!view->scroll_info.autoscrolling) {
4781                 view->scroll_info.timeout_id = 0;
4782                 return FALSE;
4783         }
4784
4785         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4786                 (view->scroll_info.last_y < view->scroll_info.start_y))
4787                 return TRUE;
4788
4789         /* Replace 100 with your speed of choice: The lower the faster.
4790          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4791          *      based on the distance of the starting point from the mouse
4792          * (All also effected by the timeout interval of this callback) */
4793
4794         if (view->scroll_info.start_y > view->scroll_info.last_y)
4795                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
4796         else
4797                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
4798
4799         value = gtk_adjustment_get_value (view->vadjustment);
4800         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
4801         gtk_adjustment_set_value (view->vadjustment, value);
4802
4803         return TRUE;
4804
4805 }
4806
4807 void
4808 ev_view_autoscroll_start (EvView *view)
4809 {
4810         gint x, y;
4811
4812         g_return_if_fail (EV_IS_VIEW (view));
4813
4814         if (view->scroll_info.autoscrolling)
4815                 return;
4816
4817         view->scroll_info.autoscrolling = TRUE;
4818         view->scroll_info.timeout_id =
4819                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
4820                                view);
4821
4822         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4823         ev_view_handle_cursor_over_xy (view, x, y);
4824 }
4825
4826 void
4827 ev_view_autoscroll_stop (EvView *view)
4828 {
4829         gint x, y;
4830
4831         g_return_if_fail (EV_IS_VIEW (view));
4832
4833         if (!view->scroll_info.autoscrolling)
4834                 return;
4835
4836         view->scroll_info.autoscrolling = FALSE;
4837         if (view->scroll_info.timeout_id) {
4838                 g_source_remove (view->scroll_info.timeout_id);
4839                 view->scroll_info.timeout_id = 0;
4840         }
4841
4842         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4843         ev_view_handle_cursor_over_xy (view, x, y);
4844 }
4845
4846 void
4847 ev_view_set_document (EvView     *view,
4848                       EvDocument *document)
4849 {
4850         g_return_if_fail (EV_IS_VIEW (view));
4851
4852         view->loading = FALSE;
4853
4854         if (document != view->document) {
4855                 clear_caches (view);
4856
4857                 if (view->document) {
4858                         g_object_unref (view->document);
4859                         view->page_cache = NULL;
4860                 }
4861
4862                 view->document = document;
4863                 view->find_result = 0;
4864
4865                 if (view->document) {
4866                         g_object_ref (view->document);
4867                         setup_caches (view);
4868                 }
4869
4870                 view_update_range_and_current_page (view);
4871
4872                 gtk_widget_queue_resize (GTK_WIDGET (view));
4873         }
4874 }
4875
4876 static void
4877 ev_view_reload_page (EvView    *view,
4878                      gint       page,
4879                      GdkRegion *region)
4880 {
4881         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
4882                                      region,
4883                                      page,
4884                                      view->rotation,
4885                                      view->scale);
4886 }
4887
4888 void
4889 ev_view_reload (EvView *view)
4890 {
4891         ev_pixbuf_cache_clear (view->pixbuf_cache);
4892         view_update_range_and_current_page (view);
4893 }
4894
4895 /*** Zoom and sizing mode ***/
4896
4897 #define EPSILON 0.0000001
4898 void
4899 ev_view_set_zoom (EvView   *view,
4900                   double    factor,
4901                   gboolean  relative)
4902 {
4903         double scale;
4904
4905         if (relative)
4906                 scale = view->scale * factor;
4907         else
4908                 scale = factor;
4909
4910         scale = CLAMP (scale,
4911                        view->sizing_mode == EV_SIZING_FREE ? view->min_scale : 0,
4912                        view->max_scale);
4913
4914         if (scale == view->scale)
4915                 return;
4916
4917         if (ABS (view->scale - scale) < EPSILON)
4918                 return;
4919
4920         if (view->loading_text) {
4921                 cairo_surface_destroy (view->loading_text);
4922                 view->loading_text = NULL;
4923         }
4924
4925         view->scale = scale;
4926         view->pending_resize = TRUE;
4927
4928         gtk_widget_queue_resize (GTK_WIDGET (view));
4929
4930         g_object_notify (G_OBJECT (view), "zoom");
4931 }
4932
4933 double
4934 ev_view_get_zoom (EvView *view)
4935 {
4936         return view->scale;
4937 }
4938
4939 void
4940 ev_view_set_screen_dpi (EvView  *view,
4941                         gdouble  dpi)
4942 {
4943         g_return_if_fail (EV_IS_VIEW (view));
4944         g_return_if_fail (dpi > 0);
4945
4946         view->dpi = dpi;
4947         view->min_scale = MIN_SCALE * dpi / 72.0;
4948         view->max_scale = MAX_SCALE * dpi / 72.0;
4949 }
4950
4951 gboolean
4952 ev_view_get_continuous (EvView *view)
4953 {
4954         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4955
4956         return view->continuous;
4957 }
4958
4959 void
4960 ev_view_set_continuous (EvView   *view,
4961                         gboolean  continuous)
4962 {
4963         g_return_if_fail (EV_IS_VIEW (view));
4964
4965         continuous = continuous != FALSE;
4966
4967         if (view->continuous != continuous) {
4968                 view->continuous = continuous;
4969                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4970                 gtk_widget_queue_resize (GTK_WIDGET (view));
4971         }
4972
4973         g_object_notify (G_OBJECT (view), "continuous");
4974 }
4975
4976 gboolean
4977 ev_view_get_dual_page (EvView *view)
4978 {
4979         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4980
4981         return view->dual_page;
4982 }
4983
4984 void
4985 ev_view_set_dual_page (EvView   *view,
4986                        gboolean  dual_page)
4987 {
4988         g_return_if_fail (EV_IS_VIEW (view));
4989
4990         dual_page = dual_page != FALSE;
4991
4992         if (view->dual_page == dual_page)
4993                 return;
4994
4995         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4996         view->dual_page = dual_page;
4997         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
4998          * preload_cache_size to be 2 if dual_page is set.
4999          */
5000         gtk_widget_queue_resize (GTK_WIDGET (view));
5001
5002         g_object_notify (G_OBJECT (view), "dual-page");
5003 }
5004
5005 void
5006 ev_view_set_fullscreen (EvView   *view,
5007                          gboolean  fullscreen)
5008 {
5009         g_return_if_fail (EV_IS_VIEW (view));
5010
5011         fullscreen = fullscreen != FALSE;
5012
5013         if (view->fullscreen == fullscreen)
5014                 return;
5015
5016         view->fullscreen = fullscreen;
5017         gtk_widget_queue_resize (GTK_WIDGET (view));
5018
5019         g_object_notify (G_OBJECT (view), "fullscreen");
5020 }
5021
5022 gboolean
5023 ev_view_get_fullscreen (EvView *view)
5024 {
5025         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5026
5027         return view->fullscreen;
5028 }
5029
5030 void
5031 ev_view_set_presentation (EvView   *view,
5032                           gboolean  presentation)
5033 {
5034         g_return_if_fail (EV_IS_VIEW (view));
5035
5036         presentation = presentation != FALSE;
5037
5038         if (view->presentation == presentation)
5039                 return;
5040
5041         if (!presentation)
5042                 view->presentation_state = EV_PRESENTATION_NORMAL;
5043
5044         view->presentation = presentation;
5045         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5046
5047         if (presentation) {
5048                 view->sizing_mode_saved = view->sizing_mode;
5049                 view->scale_saved = view->scale;
5050                 ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
5051         } else {
5052                 ev_view_set_sizing_mode (view, view->sizing_mode_saved);
5053                 ev_view_set_zoom (view, view->scale_saved, FALSE);
5054         }
5055
5056         gtk_widget_queue_resize (GTK_WIDGET (view));
5057
5058         if (presentation)
5059                 ev_view_presentation_transition_start (view);
5060         else {
5061                 ev_view_presentation_transition_stop (view);
5062
5063                 if (view->animation) {
5064                         /* stop any running animation */
5065                         ev_view_transition_animation_cancel (view->animation, view);
5066                 }
5067         }
5068
5069         if (GTK_WIDGET_REALIZED (view)) {
5070                 if (view->presentation)
5071                         gdk_window_set_background (view->layout.bin_window,
5072                                                    &GTK_WIDGET (view)->style->black);
5073                 else
5074                         gdk_window_set_background (view->layout.bin_window,
5075                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
5076         }
5077
5078         g_object_notify (G_OBJECT (view), "presentation");
5079 }
5080
5081 gboolean
5082 ev_view_get_presentation (EvView *view)
5083 {
5084         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5085
5086         return view->presentation;
5087 }
5088
5089 static gboolean
5090 transition_next_page (EvView *view)
5091 {
5092         ev_view_next_page (view);
5093
5094         return FALSE;
5095 }
5096
5097 static void
5098 ev_view_presentation_transition_stop (EvView *view)
5099 {
5100         if (view->trans_timeout_id > 0)
5101                 g_source_remove (view->trans_timeout_id);
5102         view->trans_timeout_id = 0;
5103 }
5104
5105 static void
5106 ev_view_presentation_transition_start (EvView *view)
5107 {
5108         gdouble duration;
5109
5110         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
5111                 return;
5112
5113         ev_view_presentation_transition_stop (view);
5114
5115         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
5116                                                              view->current_page);
5117         if (duration > 0) {
5118                 view->trans_timeout_id =
5119                         g_timeout_add_seconds (duration,
5120                                                (GSourceFunc) transition_next_page,
5121                                                view);
5122         }
5123 }
5124
5125 void
5126 ev_view_set_sizing_mode (EvView       *view,
5127                          EvSizingMode  sizing_mode)
5128 {
5129         g_return_if_fail (EV_IS_VIEW (view));
5130
5131         if (view->sizing_mode == sizing_mode)
5132                 return;
5133
5134         view->sizing_mode = sizing_mode;
5135         gtk_widget_queue_resize (GTK_WIDGET (view));
5136
5137         g_object_notify (G_OBJECT (view), "sizing-mode");
5138 }
5139
5140 EvSizingMode
5141 ev_view_get_sizing_mode (EvView *view)
5142 {
5143         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
5144
5145         return view->sizing_mode;
5146 }
5147
5148 gboolean
5149 ev_view_can_zoom_in (EvView *view)
5150 {
5151         return view->scale * ZOOM_IN_FACTOR <= view->max_scale;
5152 }
5153
5154 gboolean
5155 ev_view_can_zoom_out (EvView *view)
5156 {
5157         return view->scale * ZOOM_OUT_FACTOR >= view->min_scale;
5158 }
5159
5160 void
5161 ev_view_zoom_in (EvView *view)
5162 {
5163         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5164
5165         if (view->presentation)
5166                 return;
5167
5168         view->pending_scroll = SCROLL_TO_CENTER;
5169         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
5170 }
5171
5172 void
5173 ev_view_zoom_out (EvView *view)
5174 {
5175         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5176
5177         if (view->presentation)
5178                 return;
5179
5180         view->pending_scroll = SCROLL_TO_CENTER;
5181         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
5182 }
5183
5184 void
5185 ev_view_rotate_right (EvView *view)
5186 {
5187         int rotation = view->rotation + 90;
5188
5189         if (rotation >= 360) {
5190                 rotation -= 360;
5191         }
5192
5193         ev_view_set_rotation (view, rotation);
5194 }
5195
5196 void
5197 ev_view_rotate_left (EvView *view)
5198 {
5199         int rotation = view->rotation - 90;
5200
5201         if (rotation < 0) {
5202                 rotation += 360;
5203         }
5204
5205         ev_view_set_rotation (view, rotation);
5206 }
5207
5208 void
5209 ev_view_set_rotation (EvView *view, int rotation)
5210 {
5211         view->rotation = rotation;
5212
5213         if (view->pixbuf_cache) {
5214                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5215                 gtk_widget_queue_resize (GTK_WIDGET (view));
5216         }
5217
5218         if (rotation != 0)
5219                 clear_selection (view);
5220
5221         g_object_notify (G_OBJECT (view), "rotation");
5222 }
5223
5224 int
5225 ev_view_get_rotation (EvView *view)
5226 {
5227         return view->rotation;
5228 }
5229
5230 static double
5231 zoom_for_size_fit_width (int doc_width,
5232                          int doc_height,
5233                          int target_width,
5234                          int target_height,
5235                          int vsb_width)
5236 {
5237         double scale;
5238
5239         scale = (double)target_width / doc_width;
5240
5241         if (doc_height * scale > target_height)
5242                 scale = (double) (target_width - vsb_width) / doc_width;
5243
5244         return scale;
5245 }
5246
5247 static double
5248 zoom_for_size_fit_height (int doc_width,
5249                           int doc_height,
5250                           int target_width,
5251                           int target_height,
5252                           int vsb_height)
5253 {
5254         double scale;
5255
5256         scale = (double)target_height / doc_height;
5257
5258         if (doc_width * scale > target_width)
5259                 scale = (double) (target_height - vsb_height) / doc_height;
5260
5261         return scale;
5262 }
5263
5264 static double
5265 zoom_for_size_best_fit (int doc_width,
5266                         int doc_height,
5267                         int target_width,
5268                         int target_height,
5269                         int vsb_width,
5270                         int hsb_width)
5271 {
5272         double w_scale;
5273         double h_scale;
5274
5275         w_scale = (double)target_width / doc_width;
5276         h_scale = (double)target_height / doc_height;
5277
5278         if (doc_height * w_scale > target_height)
5279                 w_scale = (double) (target_width - vsb_width) / doc_width;
5280         if (doc_width * h_scale > target_width)
5281                 h_scale = (double) (target_height - hsb_width) / doc_height;
5282
5283         return MIN (w_scale, h_scale);
5284 }
5285
5286
5287 static void
5288 ev_view_zoom_for_size_presentation (EvView *view,
5289                                     int     width,
5290                                     int     height)
5291 {
5292         int doc_width, doc_height;
5293         gdouble scale;
5294
5295         ev_page_cache_get_size (view->page_cache,
5296                                 view->current_page,
5297                                 view->rotation,
5298                                 1.0,
5299                                 &doc_width,
5300                                 &doc_height);
5301         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
5302         ev_view_set_zoom (view, scale, FALSE);
5303 }
5304
5305 static void
5306 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5307                            int     width,
5308                            int     height,
5309                            int     vsb_width,
5310                            int     hsb_height)
5311 {
5312         int doc_width, doc_height;
5313         GtkBorder border;
5314         gdouble scale;
5315
5316         ev_page_cache_get_max_width (view->page_cache,
5317                                      view->rotation,
5318                                      1.0,
5319                                      &doc_width);
5320         ev_page_cache_get_max_height (view->page_cache,
5321                                       view->rotation,
5322                                       1.0,
5323                                       &doc_height);
5324         compute_border (view, doc_width, doc_height, &border);
5325
5326         doc_width = doc_width * 2;
5327         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5328         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5329
5330         /* FIXME: We really need to calculate the overall height here, not the
5331          * page height.  We assume there's always a vertical scrollbar for
5332          * now.  We need to fix this. */
5333         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5334                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
5335         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5336                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
5337         else
5338                 g_assert_not_reached ();
5339
5340         ev_view_set_zoom (view, scale, FALSE);
5341 }
5342
5343 static void
5344 ev_view_zoom_for_size_continuous (EvView *view,
5345                                   int     width,
5346                                   int     height,
5347                                   int     vsb_width,
5348                                   int     hsb_height)
5349 {
5350         int doc_width, doc_height;
5351         GtkBorder border;
5352         gdouble scale;
5353
5354         ev_page_cache_get_max_width (view->page_cache,
5355                                      view->rotation,
5356                                      1.0,
5357                                      &doc_width);
5358         ev_page_cache_get_max_height (view->page_cache,
5359                                       view->rotation,
5360                                       1.0,
5361                                       &doc_height);
5362         compute_border (view, doc_width, doc_height, &border);
5363
5364         width -= (border.left + border.right + 2 * view->spacing);
5365         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5366
5367         /* FIXME: We really need to calculate the overall height here, not the
5368          * page height.  We assume there's always a vertical scrollbar for
5369          * now.  We need to fix this. */
5370         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5371                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
5372         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5373                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
5374         else
5375                 g_assert_not_reached ();
5376
5377         ev_view_set_zoom (view, scale, FALSE);
5378 }
5379
5380 static void
5381 ev_view_zoom_for_size_dual_page (EvView *view,
5382                                  int     width,
5383                                  int     height,
5384                                  int     vsb_width,
5385                                  int     hsb_height)
5386 {
5387         GtkBorder border;
5388         gint doc_width, doc_height;
5389         gdouble scale;
5390         gint other_page;
5391
5392         other_page = view->current_page ^ 1;
5393
5394         /* Find the largest of the two. */
5395         ev_page_cache_get_size (view->page_cache,
5396                                 view->current_page,
5397                                 view->rotation,
5398                                 1.0,
5399                                 &doc_width, &doc_height);
5400
5401         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
5402                 gint width_2, height_2;
5403                 ev_page_cache_get_size (view->page_cache,
5404                                         other_page,
5405                                         view->rotation,
5406                                         1.0,
5407                                         &width_2, &height_2);
5408                 if (width_2 > doc_width)
5409                         doc_width = width_2;
5410                 if (height_2 > doc_height)
5411                         doc_height = height_2;
5412         }
5413         compute_border (view, doc_width, doc_height, &border);
5414
5415         doc_width = doc_width * 2;
5416         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5417         height -= (border.top + border.bottom + 2 * view->spacing);
5418
5419         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5420                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
5421         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5422                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
5423         else
5424                 g_assert_not_reached ();
5425
5426         ev_view_set_zoom (view, scale, FALSE);
5427 }
5428
5429 static void
5430 ev_view_zoom_for_size_single_page (EvView *view,
5431                                    int     width,
5432                                    int     height,
5433                                    int     vsb_width,
5434                                    int     hsb_height)
5435 {
5436         int doc_width, doc_height;
5437         GtkBorder border;
5438         gdouble scale;
5439
5440         ev_page_cache_get_size (view->page_cache,
5441                                 view->current_page,
5442                                 view->rotation,
5443                                 1.0,
5444                                 &doc_width,
5445                                 &doc_height);
5446         /* Get an approximate border */
5447         compute_border (view, width, height, &border);
5448
5449         width -= (border.left + border.right + 2 * view->spacing);
5450         height -= (border.top + border.bottom + 2 * view->spacing);
5451
5452         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5453                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
5454         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5455                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
5456         else
5457                 g_assert_not_reached ();
5458
5459         ev_view_set_zoom (view, scale, FALSE);
5460 }
5461
5462 void
5463 ev_view_set_zoom_for_size (EvView *view,
5464                            int     width,
5465                            int     height,
5466                            int     vsb_width,
5467                            int     hsb_height)
5468 {
5469         g_return_if_fail (EV_IS_VIEW (view));
5470         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5471                           view->sizing_mode == EV_SIZING_BEST_FIT);
5472         g_return_if_fail (width >= 0);
5473         g_return_if_fail (height >= 0);
5474
5475         if (view->document == NULL)
5476                 return;
5477
5478         if (view->presentation)
5479                 ev_view_zoom_for_size_presentation (view, width, height);
5480         else if (view->continuous && view->dual_page)
5481                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
5482         else if (view->continuous)
5483                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
5484         else if (view->dual_page)
5485                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
5486         else
5487                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
5488 }
5489
5490 /*** Find ***/
5491 static gint
5492 ev_view_find_get_n_results (EvView *view, gint page)
5493 {
5494         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5495 }
5496
5497 static EvRectangle *
5498 ev_view_find_get_result (EvView *view, gint page, gint result)
5499 {
5500         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5501 }
5502
5503 static void
5504 jump_to_find_result (EvView *view)
5505 {
5506         gint n_results;
5507         gint page = view->current_page;
5508
5509         n_results = ev_view_find_get_n_results (view, page);
5510
5511         if (n_results > 0 && view->find_result < n_results) {
5512                 EvRectangle *rect;
5513                 GdkRectangle view_rect;
5514
5515                 rect = ev_view_find_get_result (view, page, view->find_result);
5516                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5517                 ensure_rectangle_is_visible (view, &view_rect);
5518                 view->jump_to_find_result = FALSE;
5519         }
5520 }
5521
5522 /**
5523  * jump_to_find_page
5524  * @view: #EvView instance
5525  * @direction: Direction to look
5526  * @shift: Shift from current page
5527  *
5528  * Jumps to the first page that has occurences of searched word.
5529  * Uses a direction where to look and a shift from current page.
5530  *
5531  */
5532 static void
5533 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5534 {
5535         int n_pages, i;
5536
5537         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5538
5539         for (i = 0; i < n_pages; i++) {
5540                 int page;
5541
5542                 if (direction == EV_VIEW_FIND_NEXT)
5543                         page = view->current_page + i;
5544                 else
5545                         page = view->current_page - i;
5546                 page += shift;
5547
5548                 if (page >= n_pages) {
5549                         page = page - n_pages;
5550                 } else if (page < 0)
5551                         page = page + n_pages;
5552
5553                 if (ev_view_find_get_n_results (view, page) > 0) {
5554                         ev_page_cache_set_current_page (view->page_cache, page);
5555                         break;
5556                 }
5557         }
5558 }
5559
5560 void
5561 ev_view_find_changed (EvView *view, GList **results, gint page)
5562 {
5563         view->find_pages = results;
5564
5565         if (view->jump_to_find_result == TRUE) {
5566                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5567                 jump_to_find_result (view);
5568         }
5569
5570         if (view->current_page == page)
5571                 gtk_widget_queue_draw (GTK_WIDGET (view));
5572 }
5573
5574 void
5575 ev_view_find_next (EvView *view)
5576 {
5577         gint n_results;
5578
5579         n_results = ev_view_find_get_n_results (view, view->current_page);
5580         view->find_result++;
5581
5582         if (view->find_result >= n_results) {
5583                 view->find_result = 0;
5584                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5585                 jump_to_find_result (view);
5586         } else {
5587                 jump_to_find_result (view);
5588                 gtk_widget_queue_draw (GTK_WIDGET (view));
5589         }
5590 }
5591
5592 void
5593 ev_view_find_previous (EvView *view)
5594 {
5595         view->find_result--;
5596
5597         if (view->find_result < 0) {
5598                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5599                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5600                 jump_to_find_result (view);
5601         } else {
5602                 jump_to_find_result (view);
5603                 gtk_widget_queue_draw (GTK_WIDGET (view));
5604         }
5605 }
5606
5607 void
5608 ev_view_find_search_changed (EvView *view)
5609 {
5610         /* search string has changed, focus on new search result */
5611         view->jump_to_find_result = TRUE;
5612         view->find_pages = NULL;
5613 }
5614
5615 void
5616 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5617 {
5618         view->highlight_find_results = value;
5619         gtk_widget_queue_draw (GTK_WIDGET (view));
5620 }
5621
5622 void
5623 ev_view_find_cancel (EvView *view)
5624 {
5625         view->find_pages = NULL;
5626 }
5627
5628 /*** Selections ***/
5629
5630 /* compute_new_selection_rect/text calculates the area currently selected by
5631  * view_rect.  each handles a different mode;
5632  */
5633 static GList *
5634 compute_new_selection_rect (EvView       *view,
5635                             GdkPoint     *start,
5636                             GdkPoint     *stop)
5637 {
5638         GdkRectangle view_rect;
5639         int n_pages, i;
5640         GList *list = NULL;
5641
5642         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5643
5644         view_rect.x = MIN (start->x, stop->x);
5645         view_rect.y = MIN (start->y, stop->y);
5646         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5647         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5648
5649         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5650
5651         for (i = 0; i < n_pages; i++) {
5652                 GdkRectangle page_area;
5653                 GtkBorder border;
5654
5655                 if (get_page_extents (view, i, &page_area, &border)) {
5656                         GdkRectangle overlap;
5657
5658                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5659                                 EvViewSelection *selection;
5660
5661                                 selection = g_new0 (EvViewSelection, 1);
5662                                 selection->page = i;
5663                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5664                                                        &(selection->rect));
5665
5666                                 list = g_list_append (list, selection);
5667                         }
5668                 }
5669         }
5670
5671         return list;
5672 }
5673
5674 static gboolean
5675 gdk_rectangle_point_in (GdkRectangle *rectangle,
5676                         GdkPoint     *point)
5677 {
5678         return rectangle->x <= point->x &&
5679                 rectangle->y <= point->y &&
5680                 point->x < rectangle->x + rectangle->width &&
5681                 point->y < rectangle->y + rectangle->height;
5682 }
5683
5684 static GList *
5685 compute_new_selection_text (EvView          *view,
5686                             EvSelectionStyle style,
5687                             GdkPoint        *start,
5688                             GdkPoint        *stop)
5689 {
5690         int n_pages, i, first, last;
5691         GList *list = NULL;
5692         EvViewSelection *selection;
5693         gint width, height;
5694         int start_page, end_page;
5695
5696         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5697
5698         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5699
5700         /* First figure out the range of pages the selection
5701          * affects. */
5702         first = n_pages;
5703         last = 0;
5704         if (view->continuous) {
5705                 start_page = 0;
5706                 end_page = n_pages;
5707         } else if (view->dual_page) {
5708                 start_page = view->start_page;
5709                 end_page = view->end_page + 1;
5710         } else {
5711                 start_page = view->current_page;
5712                 end_page = view->current_page + 1;
5713         }
5714
5715         for (i = start_page; i < end_page; i++) {
5716                 GdkRectangle page_area;
5717                 GtkBorder border;
5718
5719                 get_page_extents (view, i, &page_area, &border);
5720                 if (gdk_rectangle_point_in (&page_area, start) ||
5721                     gdk_rectangle_point_in (&page_area, stop)) {
5722                         if (first == n_pages)
5723                                 first = i;
5724                         last = i;
5725                 }
5726
5727         }
5728
5729         /* Now create a list of EvViewSelection's for the affected
5730          * pages.  This could be an empty list, a list of just one
5731          * page or a number of pages.*/
5732         for (i = first; i < last + 1; i++) {
5733                 GdkRectangle page_area;
5734                 GtkBorder border;
5735                 GdkPoint *point;
5736
5737                 ev_page_cache_get_size (view->page_cache, i,
5738                                         view->rotation,
5739                                         1.0, &width, &height);
5740
5741                 selection = g_new0 (EvViewSelection, 1);
5742                 selection->page = i;
5743                 selection->style = style;
5744                 selection->rect.x1 = selection->rect.y1 = 0;
5745                 selection->rect.x2 = width;
5746                 selection->rect.y2 = height;
5747
5748                 get_page_extents (view, i, &page_area, &border);
5749
5750                 if (gdk_rectangle_point_in (&page_area, start))
5751                         point = start;
5752                 else
5753                         point = stop;
5754
5755                 if (i == first)
5756                         view_point_to_doc_point (view, point, &page_area,
5757                                                  &selection->rect.x1,
5758                                                  &selection->rect.y1);
5759
5760                 /* If the selection is contained within just one page,
5761                  * make sure we don't write 'start' into both points
5762                  * in selection->rect. */
5763                 if (first == last)
5764                         point = stop;
5765
5766                 if (i == last)
5767                         view_point_to_doc_point (view, point, &page_area,
5768                                                  &selection->rect.x2,
5769                                                  &selection->rect.y2);
5770
5771                 list = g_list_append (list, selection);
5772         }
5773
5774         return list;
5775 }
5776
5777 /* This function takes the newly calculated list, and figures out which regions
5778  * have changed.  It then queues a redraw approporiately.
5779  */
5780 static void
5781 merge_selection_region (EvView *view,
5782                         GList  *new_list)
5783 {
5784         GList *old_list;
5785         GList *new_list_ptr, *old_list_ptr;
5786
5787         /* Update the selection */
5788         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5789         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5790         g_list_free (view->selection_info.selections);
5791         view->selection_info.selections = new_list;
5792         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5793         g_object_notify (G_OBJECT (view), "has-selection");
5794
5795         new_list_ptr = new_list;
5796         old_list_ptr = old_list;
5797
5798         while (new_list_ptr || old_list_ptr) {
5799                 EvViewSelection *old_sel, *new_sel;
5800                 int cur_page;
5801                 GdkRegion *region = NULL;
5802
5803                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5804                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5805
5806                 /* Assume that the lists are in order, and we run through them
5807                  * comparing them, one page at a time.  We come out with the
5808                  * first page we see. */
5809                 if (new_sel && old_sel) {
5810                         if (new_sel->page < old_sel->page) {
5811                                 new_list_ptr = new_list_ptr->next;
5812                                 old_sel = NULL;
5813                         } else if (new_sel->page > old_sel->page) {
5814                                 old_list_ptr = old_list_ptr->next;
5815                                 new_sel = NULL;
5816                         } else {
5817                                 new_list_ptr = new_list_ptr->next;
5818                                 old_list_ptr = old_list_ptr->next;
5819                         }
5820                 } else if (new_sel) {
5821                         new_list_ptr = new_list_ptr->next;
5822                 } else if (old_sel) {
5823                         old_list_ptr = old_list_ptr->next;
5824                 }
5825
5826                 g_assert (new_sel || old_sel);
5827
5828                 /* is the page we're looking at on the screen?*/
5829                 cur_page = new_sel ? new_sel->page : old_sel->page;
5830                 if (cur_page < view->start_page || cur_page > view->end_page)
5831                         continue;
5832
5833                 /* seed the cache with a new page.  We are going to need the new
5834                  * region too. */
5835                 if (new_sel) {
5836                         GdkRegion *tmp_region = NULL;
5837
5838                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5839                                                                cur_page,
5840                                                                view->scale,
5841                                                                &tmp_region);
5842
5843                         if (tmp_region) {
5844                                 new_sel->covered_region = gdk_region_copy (tmp_region);
5845                         }
5846                 }
5847
5848                 /* Now we figure out what needs redrawing */
5849                 if (old_sel && new_sel) {
5850                         if (old_sel->covered_region && new_sel->covered_region) {
5851                                 /* We only want to redraw the areas that have
5852                                  * changed, so we xor the old and new regions
5853                                  * and redraw if it's different */
5854                                 region = gdk_region_copy (old_sel->covered_region);
5855                                 gdk_region_xor (region, new_sel->covered_region);
5856                                 if (gdk_region_empty (region)) {
5857                                         gdk_region_destroy (region);
5858                                         region = NULL;
5859                                 }
5860                         } else if (old_sel->covered_region) {
5861                                 region = gdk_region_copy (old_sel->covered_region);
5862                         } else if (new_sel->covered_region) {
5863                                 region = gdk_region_copy (new_sel->covered_region);
5864                         }
5865                 } else if (old_sel && !new_sel) {
5866                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
5867                                 region = gdk_region_copy (old_sel->covered_region);
5868                         }
5869                 } else if (!old_sel && new_sel) {
5870                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
5871                                 region = gdk_region_copy (new_sel->covered_region);
5872                         }
5873                 } else {
5874                         g_assert_not_reached ();
5875                 }
5876
5877                 /* Redraw the damaged region! */
5878                 if (region) {
5879                         GdkRectangle page_area;
5880                         GtkBorder border;
5881
5882                         /* I don't know why but the region is smaller
5883                          * than expected. This hack fixes it, I guess
5884                          * 10 pixels more won't hurt
5885                          */
5886                         gdk_region_shrink (region, -5, -5);
5887
5888                         get_page_extents (view, cur_page, &page_area, &border);
5889                         gdk_region_offset (region,
5890                                            page_area.x + border.left - view->scroll_x,
5891                                            page_area.y + border.top - view->scroll_y);
5892                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
5893                         gdk_region_destroy (region);
5894                 }
5895         }
5896
5897         /* Free the old list, now that we're done with it. */
5898         g_list_foreach (old_list, (GFunc) selection_free, NULL);
5899         g_list_free (old_list);
5900 }
5901
5902 static void
5903 compute_selections (EvView          *view,
5904                     EvSelectionStyle style,
5905                     GdkPoint        *start,
5906                     GdkPoint        *stop)
5907 {
5908         GList *list;
5909
5910         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
5911                 list = compute_new_selection_rect (view, start, stop);
5912         else
5913                 list = compute_new_selection_text (view, style, start, stop);
5914         merge_selection_region (view, list);
5915 }
5916
5917 /* Free's the selection.  It's up to the caller to queue redraws if needed.
5918  */
5919 static void
5920 selection_free (EvViewSelection *selection)
5921 {
5922         if (selection->covered_region)
5923                 gdk_region_destroy (selection->covered_region);
5924         g_free (selection);
5925 }
5926
5927 static void
5928 clear_selection (EvView *view)
5929 {
5930         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5931         g_list_free (view->selection_info.selections);
5932         view->selection_info.selections = NULL;
5933         view->selection_info.in_selection = FALSE;
5934         if (view->pixbuf_cache)
5935                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
5936         g_object_notify (G_OBJECT (view), "has-selection");
5937 }
5938
5939 void
5940 ev_view_select_all (EvView *view)
5941 {
5942         GList *selections = NULL;
5943         int n_pages, i;
5944
5945         /* Disable selection on rotated pages for the 0.4.0 series */
5946         if (view->rotation != 0)
5947                 return;
5948
5949         clear_selection (view);
5950
5951         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5952         for (i = 0; i < n_pages; i++) {
5953                 int width, height;
5954                 EvViewSelection *selection;
5955
5956                 ev_page_cache_get_size (view->page_cache,
5957                                         i,
5958                                         view->rotation,
5959                                         1.0, &width, &height);
5960
5961                 selection = g_new0 (EvViewSelection, 1);
5962                 selection->page = i;
5963                 selection->style = EV_SELECTION_STYLE_GLYPH;
5964                 selection->rect.x1 = selection->rect.y1 = 0;
5965                 selection->rect.x2 = width;
5966                 selection->rect.y2 = height;
5967
5968                 selections = g_list_append (selections, selection);
5969         }
5970
5971         merge_selection_region (view, selections);
5972         gtk_widget_queue_draw (GTK_WIDGET (view));
5973 }
5974
5975 gboolean
5976 ev_view_get_has_selection (EvView *view)
5977 {
5978         return view->selection_info.selections != NULL;
5979 }
5980
5981 static char *
5982 get_selected_text (EvView *view)
5983 {
5984         GString *text;
5985         GList *l;
5986         gchar *normalized_text;
5987         EvRenderContext *rc;
5988
5989         text = g_string_new (NULL);
5990         rc = ev_render_context_new (NULL, view->rotation, view->scale);
5991
5992         ev_document_doc_mutex_lock ();
5993
5994         for (l = view->selection_info.selections; l != NULL; l = l->next) {
5995                 EvViewSelection *selection = (EvViewSelection *)l->data;
5996                 EvPage *page;
5997                 gchar *tmp;
5998
5999                 page = ev_document_get_page (view->document, selection->page);
6000                 ev_render_context_set_page (rc, page);
6001                 g_object_unref (page);
6002
6003                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6004                                                       rc, selection->style,
6005                                                       &(selection->rect));
6006
6007                 g_string_append (text, tmp);
6008                 g_free (tmp);
6009         }
6010
6011         g_object_unref (rc);
6012
6013         ev_document_doc_mutex_unlock ();
6014
6015         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6016         g_string_free (text, TRUE);
6017         return normalized_text;
6018 }
6019
6020 static void
6021 ev_view_clipboard_copy (EvView      *view,
6022                         const gchar *text)
6023 {
6024         GtkClipboard *clipboard;
6025
6026         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6027                                               GDK_SELECTION_CLIPBOARD);
6028         gtk_clipboard_set_text (clipboard, text, -1);
6029 }
6030
6031 void
6032 ev_view_copy (EvView *ev_view)
6033 {
6034         char *text;
6035
6036         if (!EV_IS_SELECTION (ev_view->document))
6037                 return;
6038
6039         text = get_selected_text (ev_view);
6040         ev_view_clipboard_copy (ev_view, text);
6041         g_free (text);
6042 }
6043
6044 static void
6045 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6046                         GtkSelectionData *selection_data,
6047                         guint             info,
6048                         gpointer          data)
6049 {
6050         EvView *ev_view = EV_VIEW (data);
6051
6052         if (ev_view->link_selected) {
6053                 gtk_selection_data_set_text (selection_data,
6054                                              ev_link_action_get_uri (ev_view->link_selected),
6055                                              -1);
6056         } else if (EV_IS_SELECTION (ev_view->document) &&
6057                    ev_view->selection_info.selections) {
6058                 gchar *text;
6059
6060                 text = get_selected_text (ev_view);
6061                 if (text) {
6062                         gtk_selection_data_set_text (selection_data, text, -1);
6063                         g_free (text);
6064                 }
6065         }
6066 }
6067
6068 static void
6069 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6070                           gpointer      data)
6071 {
6072         EvView *view = EV_VIEW (data);
6073
6074         clear_selection (view);
6075         clear_link_selected (view);
6076 }
6077
6078 static void
6079 ev_view_update_primary_selection (EvView *ev_view)
6080 {
6081         GtkClipboard *clipboard;
6082
6083         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6084                                               GDK_SELECTION_PRIMARY);
6085
6086         if (ev_view->selection_info.selections || ev_view->link_selected) {
6087                 GtkTargetList *target_list;
6088                 GtkTargetEntry *targets;
6089                 int n_targets;
6090
6091                 target_list = gtk_target_list_new (NULL, 0);
6092                 gtk_target_list_add_text_targets (target_list, 0);
6093                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6094                 gtk_target_list_unref (target_list);
6095
6096                 if (!gtk_clipboard_set_with_owner (clipboard,
6097                                                    targets, n_targets,
6098                                                    ev_view_primary_get_cb,
6099                                                    ev_view_primary_clear_cb,
6100                                                    G_OBJECT (ev_view)))
6101                         ev_view_primary_clear_cb (clipboard, ev_view);
6102
6103                 gtk_target_table_free (targets, n_targets);
6104         } else {
6105                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6106                         gtk_clipboard_clear (clipboard);
6107         }
6108 }
6109
6110 static void
6111 clear_link_selected (EvView *view)
6112 {
6113         if (view->link_selected) {
6114                 g_object_unref (view->link_selected);
6115                 view->link_selected = NULL;
6116         }
6117 }
6118
6119 void
6120 ev_view_copy_link_address (EvView       *view,
6121                            EvLinkAction *action)
6122 {
6123         clear_link_selected (view);
6124
6125         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6126
6127         view->link_selected = g_object_ref (action);
6128         ev_view_update_primary_selection (view);
6129 }
6130
6131 /*** Cursor operations ***/
6132
6133 static GdkCursor *
6134 ev_view_create_invisible_cursor(void)
6135 {
6136        GdkBitmap *empty;
6137        GdkColor black = { 0, 0, 0, 0 };
6138        static char bits[] = { 0x00 };
6139
6140        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
6141
6142        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
6143 }
6144
6145 static void
6146 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6147 {
6148         GdkCursor *cursor = NULL;
6149         GdkDisplay *display;
6150         GtkWidget *widget;
6151
6152         if (view->cursor == new_cursor) {
6153                 return;
6154         }
6155
6156         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6157         display = gtk_widget_get_display (widget);
6158         view->cursor = new_cursor;
6159
6160         switch (new_cursor) {
6161                 case EV_VIEW_CURSOR_NORMAL:
6162                         gdk_window_set_cursor (view->layout.bin_window, NULL);
6163                         break;
6164                 case EV_VIEW_CURSOR_IBEAM:
6165                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
6166                         break;
6167                 case EV_VIEW_CURSOR_LINK:
6168                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
6169                         break;
6170                 case EV_VIEW_CURSOR_WAIT:
6171                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
6172                         break;
6173                 case EV_VIEW_CURSOR_HIDDEN:
6174                         cursor = ev_view_create_invisible_cursor ();
6175                         break;
6176                 case EV_VIEW_CURSOR_DRAG:
6177                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
6178                         break;
6179                 case EV_VIEW_CURSOR_AUTOSCROLL:
6180                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
6181                         break;
6182         }
6183
6184         if (cursor) {
6185                 gdk_window_set_cursor (view->layout.bin_window, cursor);
6186                 gdk_cursor_unref (cursor);
6187                 gdk_flush();
6188         }
6189 }
6190
6191 void
6192 ev_view_hide_cursor (EvView *view)
6193 {
6194        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6195 }
6196
6197 void
6198 ev_view_show_cursor (EvView *view)
6199 {
6200        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6201 }
6202
6203 static void
6204 ev_view_reset_presentation_state (EvView *view)
6205 {
6206         if (!view->presentation ||
6207             view->presentation_state == EV_PRESENTATION_NORMAL)
6208                 return;
6209
6210         view->presentation_state = EV_PRESENTATION_NORMAL;
6211         gdk_window_set_background (view->layout.bin_window,
6212                                    &GTK_WIDGET (view)->style->black);
6213         gtk_widget_queue_draw (GTK_WIDGET (view));
6214 }
6215
6216 gboolean
6217 ev_view_next_page (EvView *view)
6218 {
6219         int page, n_pages;
6220
6221         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6222
6223         if (!view->page_cache)
6224                 return FALSE;
6225
6226         if (view->presentation &&
6227             (view->presentation_state == EV_PRESENTATION_BLACK ||
6228              view->presentation_state == EV_PRESENTATION_WHITE)) {
6229                 ev_view_reset_presentation_state (view);
6230                 return FALSE;
6231         }
6232
6233         if (view->animation) {
6234                 ev_view_transition_animation_cancel (view->animation, view);
6235         }
6236
6237         ev_view_presentation_transition_stop (view);
6238         ev_view_reset_presentation_state (view);
6239
6240         page = ev_page_cache_get_current_page (view->page_cache);
6241         n_pages = ev_page_cache_get_n_pages (view->page_cache);
6242
6243         if (view->dual_page && !view->presentation)
6244                 page = page + 2;
6245         else
6246                 page = page + 1;
6247
6248         if (page < n_pages) {
6249                 ev_page_cache_set_current_page (view->page_cache, page);
6250                 return TRUE;
6251         } else if (view->presentation && page == n_pages) {
6252                 view->presentation_state = EV_PRESENTATION_END;
6253                 gtk_widget_queue_draw (GTK_WIDGET (view));
6254                 return TRUE;
6255         } else if (view->dual_page && page == n_pages) {
6256                 ev_page_cache_set_current_page (view->page_cache, page - 1);
6257                 return TRUE;
6258         } else {
6259                 return FALSE;
6260         }
6261 }
6262
6263 gboolean
6264 ev_view_previous_page (EvView *view)
6265 {
6266         int page;
6267
6268         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6269
6270         if (!view->page_cache)
6271                 return FALSE;
6272
6273         if (view->presentation &&
6274             view->presentation_state == EV_PRESENTATION_END) {
6275                 ev_view_reset_presentation_state (view);
6276                 return TRUE;
6277         }
6278
6279         if (view->presentation &&
6280             (view->presentation_state == EV_PRESENTATION_BLACK ||
6281              view->presentation_state == EV_PRESENTATION_WHITE)) {
6282                 ev_view_reset_presentation_state (view);
6283                 return FALSE;
6284         }
6285
6286         if (view->animation) {
6287                 ev_view_transition_animation_cancel (view->animation, view);
6288         }
6289
6290         ev_view_reset_presentation_state (view);
6291
6292         page = ev_page_cache_get_current_page (view->page_cache);
6293
6294         if (view->dual_page && !view->presentation)
6295                 page = page - 2;
6296         else
6297                 page = page - 1;
6298
6299         if (page >= 0) {
6300                 ev_page_cache_set_current_page (view->page_cache, page);
6301                 return TRUE;
6302         } else if (ev_view_get_dual_page (view) && page == -1) {
6303                 ev_page_cache_set_current_page (view->page_cache, 0);
6304                 return TRUE;
6305         } else {
6306                 return FALSE;
6307         }
6308 }
6309