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 static void
1140 ev_view_get_area_from_mapping (EvView       *view,
1141                                guint         page,
1142                                GList        *mapping_list,
1143                                gconstpointer data,
1144                                GdkRectangle *area)
1145 {
1146         EvMapping *mapping;
1147
1148         mapping = ev_mapping_list_find (mapping_list, data);
1149         doc_rect_to_view_rect (view, page, &mapping->area, area);
1150         area->x -= view->scroll_x;
1151         area->y -= view->scroll_y;
1152 }
1153
1154
1155 /*** Hyperref ***/
1156 static EvLink *
1157 ev_view_get_link_at_location (EvView  *view,
1158                               gdouble  x,
1159                               gdouble  y)
1160 {
1161         gint page = -1;
1162         gint x_new = 0, y_new = 0;
1163         GList *link_mapping;
1164
1165         if (!EV_IS_DOCUMENT_LINKS (view->document))
1166                 return NULL;
1167
1168         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1169                 return NULL;
1170
1171         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1172
1173         if (link_mapping)
1174                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1175         else
1176                 return NULL;
1177 }
1178
1179 static void
1180 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1181 {
1182         EvPoint doc_point;
1183         gdouble zoom, left, top;
1184         gboolean change_left, change_top;
1185
1186         left = ev_link_dest_get_left (dest, &change_left);
1187         top = ev_link_dest_get_top (dest, &change_top);
1188
1189         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1190                                        ev_link_dest_get_bottom (dest) - top,
1191                                        ev_view_get_width (view),
1192                                        ev_view_get_height (view), 0, 0);
1193
1194         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1195         ev_view_set_zoom (view, zoom, FALSE);
1196
1197         doc_point.x = change_left ? left : 0;
1198         doc_point.y = change_top ? top : 0;
1199
1200         view->current_page = ev_link_dest_get_page (dest);
1201         if (change_left || change_top)
1202                 view->pending_point = doc_point;
1203         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1204
1205         gtk_widget_queue_resize (GTK_WIDGET (view));
1206 }
1207
1208 static void
1209 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1210 {
1211         EvPoint doc_point;
1212         int doc_width, doc_height, page;
1213         double zoom, left;
1214         gboolean change_left;
1215
1216         page = ev_link_dest_get_page (dest);
1217         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1218
1219         left = ev_link_dest_get_left (dest, &change_left);
1220         doc_point.x = change_left ? left : 0;
1221         doc_point.y = 0;
1222
1223         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1224                                          ev_view_get_width (view),
1225                                          ev_view_get_height (view), 0);
1226
1227         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1228         ev_view_set_zoom (view, zoom, FALSE);
1229
1230         view->current_page = page;
1231         if (change_left)
1232                 view->pending_point = doc_point;
1233         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1234
1235         gtk_widget_queue_resize (GTK_WIDGET (view));
1236 }
1237
1238 static void
1239 goto_fith_dest (EvView *view, EvLinkDest *dest)
1240 {
1241         EvPoint doc_point;
1242         int doc_width, doc_height, page;
1243         gdouble zoom, top;
1244         gboolean change_top;
1245
1246         page = ev_link_dest_get_page (dest);
1247         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1248
1249         top = ev_link_dest_get_top (dest, &change_top);
1250
1251         doc_point.x = 0;
1252         doc_point.y = change_top ? top : 0;
1253
1254         zoom = zoom_for_size_fit_width (doc_width, top,
1255                                         ev_view_get_width (view),
1256                                         ev_view_get_height (view), 0);
1257
1258         ev_view_set_sizing_mode (view, EV_SIZING_FIT_WIDTH);
1259         ev_view_set_zoom (view, zoom, FALSE);
1260
1261         view->current_page = page;
1262         if (change_top)
1263                 view->pending_point = doc_point;
1264         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1265
1266         gtk_widget_queue_resize (GTK_WIDGET (view));
1267 }
1268
1269 static void
1270 goto_fit_dest (EvView *view, EvLinkDest *dest)
1271 {
1272         double zoom;
1273         int doc_width, doc_height;
1274         int page;
1275
1276         page = ev_link_dest_get_page (dest);
1277         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1278
1279         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1280                                        ev_view_get_height (view), 0, 0);
1281
1282         ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
1283         ev_view_set_zoom (view, zoom, FALSE);
1284
1285         view->current_page = page;
1286         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1287
1288         gtk_widget_queue_resize (GTK_WIDGET (view));
1289 }
1290
1291 static void
1292 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1293 {
1294         EvPoint doc_point;
1295         gint page;
1296         gdouble zoom, left, top;
1297         gboolean change_zoom, change_left, change_top;
1298
1299         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1300         page = ev_link_dest_get_page (dest);
1301
1302         if (change_zoom && zoom > 1) {
1303                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1304                 ev_view_set_zoom (view, zoom, FALSE);
1305         }
1306
1307         left = ev_link_dest_get_left (dest, &change_left);
1308         top = ev_link_dest_get_top (dest, &change_top);
1309
1310         doc_point.x = change_left ? left : 0;
1311         doc_point.y = change_top ? top : 0;
1312
1313         view->current_page = page;
1314         if (change_left || change_top)
1315                 view->pending_point = doc_point;
1316         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1317
1318         gtk_widget_queue_resize (GTK_WIDGET (view));
1319 }
1320
1321 static void
1322 goto_dest (EvView *view, EvLinkDest *dest)
1323 {
1324         EvLinkDestType type;
1325         int page, n_pages, current_page;
1326
1327         page = ev_link_dest_get_page (dest);
1328         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1329
1330         if (page < 0 || page >= n_pages)
1331                 return;
1332
1333         current_page = view->current_page;
1334
1335         type = ev_link_dest_get_dest_type (dest);
1336
1337         switch (type) {
1338                 case EV_LINK_DEST_TYPE_PAGE:
1339                         ev_page_cache_set_current_page (view->page_cache, page);
1340                         break;
1341                 case EV_LINK_DEST_TYPE_FIT:
1342                         goto_fit_dest (view, dest);
1343                         break;
1344                 case EV_LINK_DEST_TYPE_FITH:
1345                         goto_fith_dest (view, dest);
1346                         break;
1347                 case EV_LINK_DEST_TYPE_FITV:
1348                         goto_fitv_dest (view, dest);
1349                         break;
1350                 case EV_LINK_DEST_TYPE_FITR:
1351                         goto_fitr_dest (view, dest);
1352                         break;
1353                 case EV_LINK_DEST_TYPE_XYZ:
1354                         goto_xyz_dest (view, dest);
1355                         break;
1356                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1357                         ev_page_cache_set_page_label (view->page_cache, ev_link_dest_get_page_label (dest));
1358                         break;
1359                 default:
1360                         g_assert_not_reached ();
1361         }
1362
1363         if (current_page != view->current_page)
1364                 ev_page_cache_set_current_page (view->page_cache,
1365                                                 view->current_page);
1366 }
1367
1368 static void
1369 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1370 {
1371         EvLinkDestType type;
1372
1373         type = ev_link_dest_get_dest_type (dest);
1374
1375         if (type == EV_LINK_DEST_TYPE_NAMED) {
1376                 EvLinkDest  *dest2;
1377                 const gchar *named_dest;
1378
1379                 named_dest = ev_link_dest_get_named_dest (dest);
1380                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1381                                                           named_dest);
1382                 if (dest2) {
1383                         goto_dest (view, dest2);
1384                         g_object_unref (dest2);
1385                 }
1386
1387                 return;
1388         }
1389
1390         goto_dest (view, dest);
1391 }
1392
1393 void
1394 ev_view_handle_link (EvView *view, EvLink *link)
1395 {
1396         EvLinkAction    *action = NULL;
1397         EvLinkActionType type;
1398
1399         action = ev_link_get_action (link);
1400         if (!action)
1401                 return;
1402
1403         type = ev_link_action_get_action_type (action);
1404
1405         switch (type) {
1406                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1407                         EvLinkDest *dest;
1408
1409                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1410
1411                         dest = ev_link_action_get_dest (action);
1412                         ev_view_goto_dest (view, dest);
1413                 }
1414                         break;
1415                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1416                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1417                 case EV_LINK_ACTION_TYPE_LAUNCH:
1418                 case EV_LINK_ACTION_TYPE_NAMED:
1419                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1420                         break;
1421         }
1422 }
1423
1424 gchar *
1425 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1426 {
1427         EvLinkDestType type;
1428         gchar *msg = NULL;
1429
1430         type = ev_link_dest_get_dest_type (dest);
1431
1432         switch (type) {
1433                 case EV_LINK_DEST_TYPE_NAMED: {
1434                         EvLinkDest  *dest2;
1435                         const gchar *named_dest;
1436
1437                         named_dest = ev_link_dest_get_named_dest (dest);
1438                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1439                                                                   named_dest);
1440                         if (dest2) {
1441                                 msg = ev_page_cache_get_page_label (view->page_cache,
1442                                                                     ev_link_dest_get_page (dest2));
1443                                 g_object_unref (dest2);
1444                         }
1445                 }
1446
1447                         break;
1448                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1449                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1450                 }
1451                         break;
1452                 default:
1453                         msg = ev_page_cache_get_page_label (view->page_cache,
1454                                                             ev_link_dest_get_page (dest));
1455         }
1456
1457         return msg;
1458 }
1459
1460 static char *
1461 tip_from_action_named (EvLinkAction *action)
1462 {
1463         const gchar *name = ev_link_action_get_name (action);
1464
1465         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1466                 return g_strdup (_("Go to first page"));
1467         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1468                 return g_strdup (_("Go to previous page"));
1469         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1470                 return g_strdup (_("Go to next page"));
1471         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1472                 return g_strdup (_("Go to last page"));
1473         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1474                 return g_strdup (_("Go to page"));
1475         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1476                 return g_strdup (_("Find"));
1477         }
1478
1479         return NULL;
1480 }
1481
1482 static char *
1483 tip_from_link (EvView *view, EvLink *link)
1484 {
1485         EvLinkAction *action;
1486         EvLinkActionType type;
1487         char *msg = NULL;
1488         char *page_label;
1489         const char *title;
1490
1491         action = ev_link_get_action (link);
1492         title = ev_link_get_title (link);
1493
1494         if (!action)
1495                 return title ? g_strdup (title) : NULL;
1496
1497         type = ev_link_action_get_action_type (action);
1498
1499         switch (type) {
1500                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1501                         page_label = ev_view_page_label_from_dest (view,
1502                                                                    ev_link_action_get_dest (action));
1503                         if (page_label) {
1504                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1505                                 g_free (page_label);
1506                         }
1507                         break;
1508                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1509                         if (title) {
1510                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1511                                                        ev_link_action_get_filename (action));
1512                         } else {
1513                                 msg = g_strdup_printf (_("Go to file “%s”"),
1514                                                        ev_link_action_get_filename (action));
1515                         }
1516                         break;
1517                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1518                         msg = g_strdup (ev_link_action_get_uri (action));
1519                         break;
1520                 case EV_LINK_ACTION_TYPE_LAUNCH:
1521                         msg = g_strdup_printf (_("Launch %s"),
1522                                                ev_link_action_get_filename (action));
1523                         break;
1524                 case EV_LINK_ACTION_TYPE_NAMED:
1525                         msg = tip_from_action_named (action);
1526                         break;
1527                 default:
1528                         if (title)
1529                                 msg = g_strdup (title);
1530                         break;
1531         }
1532
1533         return msg;
1534 }
1535
1536 static void
1537 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1538 {
1539         EvLink       *link;
1540         EvFormField  *field;
1541         EvAnnotation *annot = NULL;
1542
1543         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1544                 return;
1545
1546         if (view->drag_info.in_drag) {
1547                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1548                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1549                 return;
1550         }
1551
1552         if (view->scroll_info.autoscrolling) {
1553                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1554                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1555                 return;
1556         }
1557
1558         link = ev_view_get_link_at_location (view, x, y);
1559         if (link) {
1560                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1561         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1562                 if (field->is_read_only) {
1563                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1564                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1565                             view->cursor == EV_VIEW_CURSOR_DRAG)
1566                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1567                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1568                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1569                 } else {
1570                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1571                 }
1572         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1573                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1574         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1575                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1576         } else {
1577                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1578                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1579                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1580                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1581                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1582         }
1583
1584         if (link || annot)
1585                 g_object_set (view, "has-tooltip", TRUE, NULL);
1586 }
1587
1588 /*** Images ***/
1589 static EvImage *
1590 ev_view_get_image_at_location (EvView  *view,
1591                                gdouble  x,
1592                                gdouble  y)
1593 {
1594         gint page = -1;
1595         gint x_new = 0, y_new = 0;
1596         GList *image_mapping;
1597
1598         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1599                 return NULL;
1600
1601         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1602                 return NULL;
1603
1604         image_mapping = ev_pixbuf_cache_get_image_mapping (view->pixbuf_cache, page);
1605
1606         if (image_mapping)
1607                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1608         else
1609                 return NULL;
1610 }
1611
1612 /*** Forms ***/
1613 static EvFormField *
1614 ev_view_get_form_field_at_location (EvView  *view,
1615                                     gdouble  x,
1616                                     gdouble  y)
1617 {
1618         gint page = -1;
1619         gint x_new = 0, y_new = 0;
1620         GList *forms_mapping;
1621
1622         if (!EV_IS_DOCUMENT_FORMS (view->document))
1623                 return NULL;
1624
1625         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1626                 return NULL;
1627
1628         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, page);
1629
1630         if (forms_mapping)
1631                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1632         else
1633                 return NULL;
1634 }
1635
1636 static GdkRegion *
1637 ev_view_form_field_get_region (EvView      *view,
1638                                EvFormField *field)
1639 {
1640         GdkRectangle view_area;
1641         GList       *forms_mapping;
1642
1643         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1644                                                                 field->page->index);
1645         ev_view_get_area_from_mapping (view, field->page->index,
1646                                        forms_mapping,
1647                                        field, &view_area);
1648
1649         return gdk_region_rectangle (&view_area);
1650 }
1651
1652 static gboolean
1653 ev_view_forms_remove_widgets (EvView *view)
1654 {
1655         ev_view_remove_all (view);
1656
1657         return FALSE;
1658 }
1659
1660 static void
1661 ev_view_form_field_destroy (GtkWidget *widget,
1662                             EvView    *view)
1663 {
1664         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1665 }
1666
1667 static GtkWidget *
1668 ev_view_form_field_button_create_widget (EvView      *view,
1669                                          EvFormField *field)
1670 {
1671         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1672         GdkRegion         *field_region = NULL;
1673
1674         switch (field_button->type) {
1675                 case EV_FORM_FIELD_BUTTON_PUSH:
1676                         return NULL;
1677                 case EV_FORM_FIELD_BUTTON_CHECK:
1678                 case EV_FORM_FIELD_BUTTON_RADIO: {
1679                         gboolean  state;
1680                         GList    *forms_mapping, *l;
1681
1682                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1683                                                                                field);
1684
1685                         /* FIXME: it actually depends on NoToggleToOff flags */
1686                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1687                             state && field_button->state)
1688                                 return NULL;
1689
1690                         field_region = ev_view_form_field_get_region (view, field);
1691
1692                         /* For radio buttons and checkbox buttons that are in a set
1693                          * we need to update also the region for the current selected item
1694                          */
1695                         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1696                                                                                 field->page->index);
1697                         for (l = forms_mapping; l; l = g_list_next (l)) {
1698                                 EvFormField *button = ((EvMapping *)(l->data))->data;
1699                                 GdkRegion   *button_region;
1700
1701                                 if (button->id == field->id)
1702                                         continue;
1703
1704                                 /* FIXME: only buttons in the same group should be updated */
1705                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1706                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1707                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1708                                         continue;
1709
1710                                 button_region = ev_view_form_field_get_region (view, button);
1711                                 gdk_region_union (field_region, button_region);
1712                                 gdk_region_destroy (button_region);
1713                         }
1714
1715                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
1716                                                                        field, !state);
1717                         field_button->state = !state;
1718                 }
1719                         break;
1720         }
1721
1722         ev_view_reload_page (view, field->page->index, field_region);
1723         gdk_region_destroy (field_region);
1724
1725         return NULL;
1726 }
1727
1728 static void
1729 ev_view_form_field_text_save (EvView    *view,
1730                               GtkWidget *widget)
1731 {
1732         EvFormField *field;
1733
1734         if (!view->document)
1735                 return;
1736
1737         field = g_object_get_data (G_OBJECT (widget), "form-field");
1738
1739         if (field->changed) {
1740                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1741                 GdkRegion       *field_region;
1742
1743                 field_region = ev_view_form_field_get_region (view, field);
1744
1745                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
1746                                                             field, field_text->text);
1747                 field->changed = FALSE;
1748                 ev_view_reload_page (view, field->page->index, field_region);
1749                 gdk_region_destroy (field_region);
1750         }
1751 }
1752
1753 static void
1754 ev_view_form_field_text_changed (GtkWidget   *widget,
1755                                  EvFormField *field)
1756 {
1757         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1758         gchar           *text = NULL;
1759
1760         if (GTK_IS_ENTRY (widget)) {
1761                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
1762         } else if (GTK_IS_TEXT_BUFFER (widget)) {
1763                 GtkTextIter start, end;
1764
1765                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
1766                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
1767                                                  &start, &end, FALSE);
1768         }
1769
1770         if (!field_text->text ||
1771             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
1772                 g_free (field_text->text);
1773                 field_text->text = text;
1774                 field->changed = TRUE;
1775         }
1776 }
1777
1778 static GtkWidget *
1779 ev_view_form_field_text_create_widget (EvView      *view,
1780                                        EvFormField *field)
1781 {
1782         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1783         GtkWidget       *text = NULL;
1784         gchar           *txt;
1785
1786         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
1787                                                           field);
1788
1789         switch (field_text->type) {
1790                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
1791                         /* TODO */
1792                 case EV_FORM_FIELD_TEXT_NORMAL:
1793                         text = gtk_entry_new ();
1794                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
1795                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
1796                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
1797
1798                         if (txt) {
1799                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
1800                                 g_free (txt);
1801                         }
1802
1803                         g_signal_connect (text, "changed",
1804                                           G_CALLBACK (ev_view_form_field_text_changed),
1805                                           field);
1806                         g_signal_connect_after (text, "activate",
1807                                                 G_CALLBACK (ev_view_form_field_destroy),
1808                                                 view);
1809                         break;
1810                 case EV_FORM_FIELD_TEXT_MULTILINE: {
1811                         GtkTextBuffer *buffer;
1812
1813                         text = gtk_text_view_new ();
1814                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
1815
1816                         if (txt) {
1817                                 gtk_text_buffer_set_text (buffer, txt, -1);
1818                                 g_free (txt);
1819                         }
1820
1821                         g_signal_connect (buffer, "changed",
1822                                           G_CALLBACK (ev_view_form_field_text_changed),
1823                                           field);
1824                 }
1825                         break;
1826         }
1827
1828         g_object_weak_ref (G_OBJECT (text),
1829                            (GWeakNotify)ev_view_form_field_text_save,
1830                            view);
1831
1832         return text;
1833 }
1834
1835 static void
1836 ev_view_form_field_choice_save (EvView    *view,
1837                                 GtkWidget *widget)
1838 {
1839         EvFormField *field;
1840
1841         if (!view->document)
1842                 return;
1843
1844         field = g_object_get_data (G_OBJECT (widget), "form-field");
1845
1846         if (field->changed) {
1847                 GList             *l;
1848                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1849                 GdkRegion         *field_region;
1850
1851                 field_region = ev_view_form_field_get_region (view, field);
1852
1853                 if (field_choice->is_editable) {
1854                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
1855                                                                       field, field_choice->text);
1856                 } else {
1857                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
1858                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
1859                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
1860                                                                                  field,
1861                                                                                  GPOINTER_TO_INT (l->data));
1862                         }
1863                 }
1864                 field->changed = FALSE;
1865                 ev_view_reload_page (view, field->page->index, field_region);
1866                 gdk_region_destroy (field_region);
1867         }
1868 }
1869
1870 static void
1871 ev_view_form_field_choice_changed (GtkWidget   *widget,
1872                                    EvFormField *field)
1873 {
1874         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1875
1876         if (GTK_IS_COMBO_BOX (widget)) {
1877                 gint item;
1878
1879                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
1880                 if (!field_choice->selected_items ||
1881                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
1882                         g_list_free (field_choice->selected_items);
1883                         field_choice->selected_items = NULL;
1884                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1885                                                                        GINT_TO_POINTER (item));
1886                         field->changed = TRUE;
1887                 }
1888
1889                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
1890                         gchar *text;
1891
1892                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
1893                         if (!field_choice->text ||
1894                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
1895                                 g_free (field_choice->text);
1896                                 field_choice->text = text;
1897                                 field->changed = TRUE;
1898                         }
1899                 }
1900         } else if (GTK_IS_TREE_SELECTION (widget)) {
1901                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
1902                 GtkTreeModel     *model;
1903                 GList            *items, *l;
1904
1905                 items = gtk_tree_selection_get_selected_rows (selection, &model);
1906                 g_list_free (field_choice->selected_items);
1907                 field_choice->selected_items = NULL;
1908
1909                 for (l = items; l && l->data; l = g_list_next (l)) {
1910                         GtkTreeIter  iter;
1911                         GtkTreePath *path = (GtkTreePath *)l->data;
1912                         gint         item;
1913
1914                         gtk_tree_model_get_iter (model, &iter, path);
1915                         gtk_tree_model_get (model, &iter, 1, &item, -1);
1916
1917                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1918                                                                        GINT_TO_POINTER (item));
1919
1920                         gtk_tree_path_free (path);
1921                 }
1922
1923                 g_list_free (items);
1924
1925                 field->changed = TRUE;
1926         }
1927 }
1928
1929 static GtkWidget *
1930 ev_view_form_field_choice_create_widget (EvView      *view,
1931                                          EvFormField *field)
1932 {
1933         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1934         GtkWidget         *choice;
1935         GtkTreeModel      *model;
1936         gint               n_items, i;
1937         gint               selected_item = 0;
1938
1939         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
1940                                                                    field);
1941         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
1942         for (i = 0; i < n_items; i++) {
1943                 GtkTreeIter iter;
1944                 gchar      *item;
1945
1946                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
1947                                                                      field, i);
1948                 if (ev_document_forms_form_field_choice_is_item_selected (
1949                             EV_DOCUMENT_FORMS (view->document), field, i)) {
1950                         selected_item = i;
1951                         /* FIXME: we need a get_selected_items function in poppler */
1952                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1953                                                                        GINT_TO_POINTER (i));
1954                 }
1955
1956                 if (item) {
1957                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
1958                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
1959                                             0, item,
1960                                             1, i,
1961                                             -1);
1962                         g_free (item);
1963                 }
1964         }
1965
1966         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
1967                 GtkCellRenderer  *renderer;
1968                 GtkWidget        *tree_view;
1969                 GtkTreeSelection *selection;
1970
1971                 tree_view = gtk_tree_view_new_with_model (model);
1972                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
1973
1974                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
1975                 if (field_choice->multi_select) {
1976                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
1977                 }
1978
1979                 /* TODO: set selected items */
1980
1981                 renderer = gtk_cell_renderer_text_new ();
1982                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
1983                                                              0,
1984                                                              "choix", renderer,
1985                                                              "text", 0,
1986                                                              NULL);
1987
1988                 choice = gtk_scrolled_window_new (NULL, NULL);
1989                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
1990                                                 GTK_POLICY_AUTOMATIC,
1991                                                 GTK_POLICY_AUTOMATIC);
1992                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
1993                 gtk_widget_show (tree_view);
1994
1995                 g_signal_connect (selection, "changed",
1996                                   G_CALLBACK (ev_view_form_field_choice_changed),
1997                                   field);
1998                 g_signal_connect_after (selection, "changed",
1999                                         G_CALLBACK (ev_view_form_field_destroy),
2000                                         view);
2001         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2002                 gchar *text;
2003
2004                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2005                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2006                 if (text) {
2007                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2008                         g_free (text);
2009                 }
2010
2011                 g_signal_connect (choice, "changed",
2012                                   G_CALLBACK (ev_view_form_field_choice_changed),
2013                                   field);
2014                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
2015                                         G_CALLBACK (ev_view_form_field_destroy),
2016                                         view);
2017         } else { /* ComboBoxText */
2018                 GtkCellRenderer *renderer;
2019
2020                 choice = gtk_combo_box_new_with_model (model);
2021                 renderer = gtk_cell_renderer_text_new ();
2022                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2023                                             renderer, TRUE);
2024                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2025                                                 renderer,
2026                                                 "text", 0,
2027                                                 NULL);
2028                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2029                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2030
2031                 g_signal_connect (choice, "changed",
2032                                   G_CALLBACK (ev_view_form_field_choice_changed),
2033                                   field);
2034                 g_signal_connect_after (choice, "changed",
2035                                         G_CALLBACK (ev_view_form_field_destroy),
2036                                         view);
2037         }
2038
2039         g_object_unref (model);
2040
2041         g_object_weak_ref (G_OBJECT (choice),
2042                            (GWeakNotify)ev_view_form_field_choice_save,
2043                            view);
2044
2045         return choice;
2046 }
2047
2048 static void
2049 ev_view_handle_form_field (EvView      *view,
2050                            EvFormField *field,
2051                            gdouble      x,
2052                            gdouble      y)
2053 {
2054         GtkWidget   *field_widget = NULL;
2055         GList       *form_field_mapping;
2056         GdkRectangle view_area;
2057
2058         if (field->is_read_only)
2059                 return;
2060
2061         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2062                 field_widget = ev_view_form_field_button_create_widget (view, field);
2063         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2064                 field_widget = ev_view_form_field_text_create_widget (view, field);
2065         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2066                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2067         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2068                 /* TODO */
2069         }
2070
2071         /* Form field doesn't require a widget */
2072         if (!field_widget)
2073                 return;
2074
2075         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2076                                 g_object_ref (field),
2077                                 (GDestroyNotify)g_object_unref);
2078
2079         form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, field->page->index);
2080         ev_view_get_area_from_mapping (view, field->page->index,
2081                                        form_field_mapping,
2082                                        field, &view_area);
2083
2084         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2085         gtk_widget_show (field_widget);
2086         gtk_widget_grab_focus (field_widget);
2087 }
2088
2089 /* Annotations */
2090 static EvViewWindowChild *
2091 ev_view_get_window_child (EvView    *view,
2092                           GtkWidget *window)
2093 {
2094         GList *children = view->window_children;
2095
2096         while (children) {
2097                 EvViewWindowChild *child;
2098
2099                 child = (EvViewWindowChild *)children->data;
2100                 children = children->next;
2101
2102                 if (child->window == window)
2103                         return child;
2104         }
2105
2106         return NULL;
2107 }
2108
2109 static void
2110 ev_view_window_child_move (EvView            *view,
2111                            EvViewWindowChild *child,
2112                            gint               x,
2113                            gint               y)
2114 {
2115         child->x = x;
2116         child->y = y;
2117         gtk_window_move (GTK_WINDOW (child->window),
2118                          MAX (child->parent_x, x),
2119                          MAX (child->parent_y, y));
2120 }
2121
2122 static void
2123 ev_view_window_child_move_with_parent (EvView    *view,
2124                                        GtkWidget *window)
2125 {
2126         EvViewWindowChild *child;
2127         gint               root_x, root_y;
2128
2129         child = ev_view_get_window_child (view, window);
2130         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2131                                &root_x, &root_y);
2132         if (root_x != child->parent_x || root_y != child->parent_y) {
2133                 gint dest_x, dest_y;
2134
2135                 dest_x = child->x + (root_x - child->parent_x);
2136                 dest_y = child->y + (root_y - child->parent_y);
2137                 child->parent_x = root_x;
2138                 child->parent_y = root_y;
2139                 ev_view_window_child_move (view, child, dest_x, dest_y);
2140         }
2141
2142         if (child->visible && !GTK_WIDGET_VISIBLE (window))
2143                 gtk_widget_show (window);
2144 }
2145
2146 static void
2147 ev_view_window_child_put (EvView    *view,
2148                           GtkWidget *window,
2149                           guint      page,
2150                           gint       x,
2151                           gint       y,
2152                           gdouble    orig_x,
2153                           gdouble    orig_y)
2154 {
2155         EvViewWindowChild *child;
2156         gint               root_x, root_y;
2157
2158         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2159                                &root_x, &root_y);
2160
2161         child = g_new0 (EvViewWindowChild, 1);
2162         child->window = window;
2163         child->page = page;
2164         child->orig_x = orig_x;
2165         child->orig_y = orig_y;
2166         child->parent_x = root_x;
2167         child->parent_y = root_y;
2168         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2169         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2170
2171         if (child->visible)
2172                 gtk_widget_show (window);
2173         else
2174                 gtk_widget_hide (window);
2175
2176         view->window_children = g_list_append (view->window_children, child);
2177 }
2178
2179 static EvViewWindowChild *
2180 ev_view_find_window_child_for_annot (EvView       *view,
2181                                      guint         page,
2182                                      EvAnnotation *annot)
2183 {
2184         GList *children = view->window_children;
2185
2186         while (children) {
2187                 EvViewWindowChild *child;
2188                 EvAnnotation      *wannot;
2189
2190                 child = (EvViewWindowChild *)children->data;
2191                 children = children->next;
2192
2193                 if (child->page != page)
2194                         continue;
2195
2196                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2197                 if (wannot == annot || strcmp (wannot->name, annot->name) == 0)
2198                         return child;
2199         }
2200
2201         return NULL;
2202 }
2203
2204 static void
2205 ev_view_window_children_free (EvView *view)
2206 {
2207         GList *l;
2208
2209         if (!view->window_children)
2210                 return;
2211
2212         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2213                 EvViewWindowChild *child;
2214
2215                 child = (EvViewWindowChild *)l->data;
2216                 gtk_widget_destroy (GTK_WIDGET (child->window));
2217                 g_free (child);
2218         }
2219         g_list_free (view->window_children);
2220         view->window_children = NULL;
2221         view->window_child_focus = NULL;
2222 }
2223
2224 static void
2225 annotation_window_grab_focus (GtkWidget *widget,
2226                               EvView    *view)
2227 {
2228         if (view->window_child_focus)
2229                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2230         view->window_child_focus = ev_view_get_window_child (view, widget);
2231 }
2232
2233 static void
2234 annotation_window_closed (EvAnnotationWindow *window,
2235                           EvView             *view)
2236 {
2237         EvViewWindowChild *child;
2238
2239         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2240         child->visible = FALSE;
2241 }
2242
2243 static void
2244 annotation_window_moved (EvAnnotationWindow *window,
2245                          gint                x,
2246                          gint                y,
2247                          EvView             *view)
2248 {
2249         EvViewWindowChild *child;
2250         GdkRectangle       page_area;
2251         GtkBorder          border;
2252         GdkRectangle       view_rect;
2253         EvRectangle        doc_rect;
2254         gint               width, height;
2255
2256         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2257         if (child->x == x && child->y == y)
2258                 return;
2259
2260         child->moved = TRUE;
2261         child->x = x;
2262         child->y = y;
2263
2264         /* Window has been moved by the user,
2265          * we have to set a new origin in doc coords
2266          */
2267         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2268         view_rect.x = (x - child->parent_x) + view->scroll_x;
2269         view_rect.y = (y - child->parent_y) + view->scroll_y;
2270         view_rect.width = width;
2271         view_rect.height = height;
2272
2273         get_page_extents (view, child->page, &page_area, &border);
2274         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2275         child->orig_x = doc_rect.x1;
2276         child->orig_y = doc_rect.y1;
2277 }
2278
2279 static void
2280 ev_view_annotation_save (EvView       *view,
2281                          EvAnnotation *annot)
2282 {
2283         if (!view->document)
2284                 return;
2285
2286         if (!annot->changed)
2287                 return;
2288
2289         ev_document_annotations_annotation_set_contents (EV_DOCUMENT_ANNOTATIONS (view->document),
2290                                                          annot, annot->contents);
2291         annot->changed = FALSE;
2292 }
2293
2294 static void
2295 show_annotation_windows (EvView *view,
2296                          gint    page)
2297 {
2298         GList     *annots, *l;
2299         GtkWindow *parent;
2300
2301         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2302
2303         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2304
2305         for (l = annots; l && l->data; l = g_list_next (l)) {
2306                 EvAnnotation      *annot;
2307                 EvViewWindowChild *child;
2308                 GtkWidget         *window;
2309                 EvRectangle       *doc_rect;
2310                 GdkRectangle       view_rect;
2311
2312                 annot = ((EvMapping *)(l->data))->data;
2313
2314                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2315                         continue;
2316
2317                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2318                         continue;
2319
2320                 window = g_object_get_data (G_OBJECT (annot), "popup");
2321                 if (window) {
2322                         ev_view_window_child_move_with_parent (view, window);
2323                         continue;
2324                 }
2325
2326                 /* Look if we already have a popup for this annot */
2327                 child = ev_view_find_window_child_for_annot (view, page, annot);
2328                 window = child ? child->window : NULL;
2329                 if (window) {
2330                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2331                         g_object_set_data (G_OBJECT (annot), "popup", window);
2332                         ev_view_window_child_move_with_parent (view, window);
2333                 } else {
2334                         window = ev_annotation_window_new (annot, parent);
2335                         g_signal_connect (window, "grab_focus",
2336                                           G_CALLBACK (annotation_window_grab_focus),
2337                                           view);
2338                         g_signal_connect (window, "closed",
2339                                           G_CALLBACK (annotation_window_closed),
2340                                           view);
2341                         g_signal_connect (window, "moved",
2342                                           G_CALLBACK (annotation_window_moved),
2343                                           view);
2344                         g_object_set_data (G_OBJECT (annot), "popup", window);
2345
2346                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2347                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2348                         view_rect.x -= view->scroll_x;
2349                         view_rect.y -= view->scroll_y;
2350
2351                         ev_view_window_child_put (view, window, page,
2352                                                   view_rect.x, view_rect.y,
2353                                                   doc_rect->x1, doc_rect->y1);
2354
2355                         g_object_weak_ref (G_OBJECT (annot),
2356                                            (GWeakNotify)ev_view_annotation_save,
2357                                            view);
2358                 }
2359         }
2360 }
2361
2362 static void
2363 hide_annotation_windows (EvView *view,
2364                          gint    page)
2365 {
2366         GList *annots, *l;
2367
2368         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2369
2370         for (l = annots; l && l->data; l = g_list_next (l)) {
2371                 EvAnnotation *annot;
2372                 GtkWidget    *window;
2373
2374                 annot = ((EvMapping *)(l->data))->data;
2375
2376                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2377                         continue;
2378
2379                 window = g_object_get_data (G_OBJECT (annot), "popup");
2380                 if (window)
2381                         gtk_widget_hide (window);
2382         }
2383 }
2384
2385 static EvAnnotation *
2386 ev_view_get_annotation_at_location (EvView  *view,
2387                                     gdouble  x,
2388                                     gdouble  y)
2389 {
2390         gint page = -1;
2391         gint x_new = 0, y_new = 0;
2392         GList *annotations_mapping;
2393
2394         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2395                 return NULL;
2396
2397         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2398                 return NULL;
2399
2400         annotations_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2401
2402         if (annotations_mapping)
2403                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2404         else
2405                 return NULL;
2406 }
2407
2408 static void
2409 ev_view_handle_annotation (EvView       *view,
2410                            EvAnnotation *annot,
2411                            gdouble       x,
2412                            gdouble       y)
2413 {
2414         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2415                 GtkWidget *window;
2416
2417                 window = g_object_get_data (G_OBJECT (annot), "popup");
2418                 if (window) {
2419                         EvViewWindowChild *child;
2420
2421                         child = ev_view_get_window_child (view, window);
2422                         if (!child->visible) {
2423                                 child->visible = TRUE;
2424                                 ev_view_window_child_move (view, child, child->x, child->y);
2425                                 gtk_widget_show (window);
2426                         }
2427                 }
2428         }
2429 }
2430
2431 /*** GtkWidget implementation ***/
2432
2433 static void
2434 ev_view_size_request_continuous_dual_page (EvView         *view,
2435                                            GtkRequisition *requisition)
2436 {
2437         int max_width;
2438         gint n_pages;
2439         GtkBorder border;
2440
2441         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2442                                      view->scale, &max_width);
2443         compute_border (view, max_width, max_width, &border);
2444
2445         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
2446
2447         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2448         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
2449
2450         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2451                 requisition->width = 1;
2452         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2453                 requisition->width = 1;
2454                 /* FIXME: This could actually be set on one page docs or docs
2455                  * with a strange aspect ratio. */
2456                 /* requisition->height = 1;*/
2457         }
2458 }
2459
2460 static void
2461 ev_view_size_request_continuous (EvView         *view,
2462                                  GtkRequisition *requisition)
2463 {
2464         int max_width;
2465         int n_pages;
2466         GtkBorder border;
2467
2468
2469         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2470                                      view->scale, &max_width);
2471         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2472         compute_border (view, max_width, max_width, &border);
2473
2474         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2475         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
2476
2477         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2478                 requisition->width = 1;
2479         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2480                 requisition->width = 1;
2481                 /* FIXME: This could actually be set on one page docs or docs
2482                  * with a strange aspect ratio. */
2483                 /* requisition->height = 1;*/
2484         }
2485 }
2486
2487 static void
2488 ev_view_size_request_dual_page (EvView         *view,
2489                                 GtkRequisition *requisition)
2490 {
2491         GtkBorder border;
2492         gint width, height;
2493
2494         /* Find the largest of the two. */
2495         ev_page_cache_get_size (view->page_cache,
2496                                 view->current_page,
2497                                 view->rotation,
2498                                 view->scale,
2499                                 &width, &height);
2500         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
2501                 gint width_2, height_2;
2502                 ev_page_cache_get_size (view->page_cache,
2503                                         view->current_page + 1,
2504                                         view->rotation,
2505                                         view->scale,
2506                                         &width_2, &height_2);
2507                 if (width_2 > width) {
2508                         width = width_2;
2509                         height = height_2;
2510                 }
2511         }
2512         compute_border (view, width, height, &border);
2513
2514         requisition->width = ((width + border.left + border.right) * 2) +
2515                 (view->spacing * 3);
2516         requisition->height = (height + border.top + border.bottom) +
2517                 (view->spacing * 2);
2518
2519         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2520                 requisition->width = 1;
2521         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2522                 requisition->width = 1;
2523                 requisition->height = 1;
2524         }
2525 }
2526
2527 static void
2528 ev_view_size_request_single_page (EvView         *view,
2529                                   GtkRequisition *requisition)
2530 {
2531         GtkBorder border;
2532         gint width, height;
2533
2534         ev_page_cache_get_size (view->page_cache,
2535                                 view->current_page,
2536                                 view->rotation,
2537                                 view->scale,
2538                                 &width, &height);
2539         compute_border (view, width, height, &border);
2540
2541         requisition->width = width + border.left + border.right + (2 * view->spacing);
2542         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2543
2544         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2545                 requisition->width = 1;
2546                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2547         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2548                 requisition->width = 1;
2549                 requisition->height = 1;
2550         }
2551 }
2552
2553 static void
2554 ev_view_size_request (GtkWidget      *widget,
2555                       GtkRequisition *requisition)
2556 {
2557         EvView *view = EV_VIEW (widget);
2558
2559         if (view->document == NULL) {
2560                 requisition->width = 1;
2561                 requisition->height = 1;
2562                 return;
2563         }
2564
2565         if (view->presentation) {
2566                 requisition->width = 1;
2567                 requisition->height = 1;
2568                 return;
2569         }
2570
2571         if (view->continuous && view->dual_page)
2572                 ev_view_size_request_continuous_dual_page (view, requisition);
2573         else if (view->continuous)
2574                 ev_view_size_request_continuous (view, requisition);
2575         else if (view->dual_page)
2576                 ev_view_size_request_dual_page (view, requisition);
2577         else
2578                 ev_view_size_request_single_page (view, requisition);
2579 }
2580
2581 static void
2582 ev_view_size_allocate (GtkWidget      *widget,
2583                        GtkAllocation  *allocation)
2584 {
2585         EvView *view = EV_VIEW (widget);
2586         GList  *children, *l;
2587         gint    root_x, root_y;
2588
2589         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2590
2591         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2592             view->sizing_mode == EV_SIZING_BEST_FIT) {
2593                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
2594                 ev_view_size_request (widget, &widget->requisition);
2595         }
2596
2597         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2598         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2599
2600         if (view->document)
2601                 view_update_range_and_current_page (view);
2602
2603         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2604         view->pending_resize = FALSE;
2605
2606         children = gtk_container_get_children (GTK_CONTAINER (widget));
2607         for (l = children; l && l->data; l = g_list_next (l)) {
2608                 EvFormField   *field;
2609                 GdkRectangle   view_area;
2610                 GList         *form_field_mapping;
2611                 GtkAllocation  child_allocation;
2612                 GtkRequisition child_requisition;
2613                 GtkWidget     *child = (GtkWidget *)l->data;
2614
2615                 field = g_object_get_data (G_OBJECT (child), "form-field");
2616                 if (!field)
2617                         continue;
2618
2619                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2620                                                                              field->page->index);
2621                 ev_view_get_area_from_mapping (view, field->page->index,
2622                                                form_field_mapping,
2623                                                field, &view_area);
2624
2625                 gtk_widget_size_request (child, &child_requisition);
2626                 if (child_requisition.width != view_area.width ||
2627                     child_requisition.height != view_area.height)
2628                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2629
2630                 gtk_container_child_get (GTK_CONTAINER (widget),
2631                                          child,
2632                                          "x", &child_allocation.x,
2633                                          "y", &child_allocation.y,
2634                                          NULL);
2635                 if (child_allocation.x != view_area.x ||
2636                     child_allocation.y != view_area.y) {
2637                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2638                 }
2639         }
2640         g_list_free (children);
2641
2642         if (view->window_children)
2643                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2644                                        &root_x, &root_y);
2645
2646         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2647                 EvViewWindowChild *child;
2648                 EvRectangle        doc_rect;
2649                 GdkRectangle       view_rect;
2650
2651                 child = (EvViewWindowChild *)l->data;
2652
2653                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
2654                 if (child->moved) {
2655                         doc_rect.x1 = child->orig_x;
2656                         doc_rect.y1 = child->orig_y;
2657                 }
2658                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
2659                 view_rect.x -= view->scroll_x;
2660                 view_rect.y -= view->scroll_y;
2661
2662                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
2663                         child->parent_x = root_x;
2664                         child->parent_y = root_y;
2665                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
2666                 }
2667         }
2668 }
2669
2670 static void
2671 ev_view_realize (GtkWidget *widget)
2672 {
2673         EvView *view = EV_VIEW (widget);
2674
2675         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
2676                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
2677
2678         gdk_window_set_events (view->layout.bin_window,
2679                                (gdk_window_get_events (view->layout.bin_window) |
2680                                 GDK_EXPOSURE_MASK |
2681                                 GDK_BUTTON_PRESS_MASK |
2682                                 GDK_BUTTON_RELEASE_MASK |
2683                                 GDK_SCROLL_MASK |
2684                                 GDK_KEY_PRESS_MASK |
2685                                 GDK_POINTER_MOTION_MASK |
2686                                 GDK_POINTER_MOTION_HINT_MASK |
2687                                 GDK_ENTER_NOTIFY_MASK |
2688                                 GDK_LEAVE_NOTIFY_MASK));
2689
2690         if (view->presentation)
2691                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
2692         else
2693                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
2694 }
2695
2696 static gboolean
2697 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
2698 {
2699         EvView *view = EV_VIEW (widget);
2700         guint state;
2701
2702         state = event->state & gtk_accelerator_get_default_mod_mask ();
2703
2704         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
2705                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
2706
2707                 if (event->direction == GDK_SCROLL_UP ||
2708                     event->direction == GDK_SCROLL_LEFT) {
2709                         if (ev_view_can_zoom_in (view)) {
2710                                 ev_view_zoom_in (view);
2711                         }
2712                 } else {
2713                         if (ev_view_can_zoom_out (view)) {
2714                                 ev_view_zoom_out (view);
2715                         }
2716                 }
2717
2718                 return TRUE;
2719         }
2720
2721         view->jump_to_find_result = FALSE;
2722
2723         /* Shift+Wheel scrolls the in the perpendicular direction */
2724         if (state & GDK_SHIFT_MASK) {
2725                 if (event->direction == GDK_SCROLL_UP)
2726                         event->direction = GDK_SCROLL_LEFT;
2727                 else if (event->direction == GDK_SCROLL_LEFT)
2728                         event->direction = GDK_SCROLL_UP;
2729                 else if (event->direction == GDK_SCROLL_DOWN)
2730                         event->direction = GDK_SCROLL_RIGHT;
2731                 else if (event->direction == GDK_SCROLL_RIGHT)
2732                         event->direction = GDK_SCROLL_DOWN;
2733
2734                 event->state &= ~GDK_SHIFT_MASK;
2735                 state &= ~GDK_SHIFT_MASK;
2736         }
2737
2738         if (state == 0 && view->presentation) {
2739                 switch (event->direction) {
2740                         case GDK_SCROLL_DOWN:
2741                         case GDK_SCROLL_RIGHT:
2742                                 ev_view_next_page (view);
2743                                 break;
2744                         case GDK_SCROLL_UP:
2745                         case GDK_SCROLL_LEFT:
2746                                 ev_view_previous_page (view);
2747                                 break;
2748                 }
2749
2750                 return TRUE;
2751         }
2752
2753         return FALSE;
2754 }
2755
2756 static EvViewSelection *
2757 find_selection_for_page (EvView *view,
2758                          gint    page)
2759 {
2760         GList *list;
2761
2762         for (list = view->selection_info.selections; list != NULL; list = list->next) {
2763                 EvViewSelection *selection;
2764
2765                 selection = (EvViewSelection *) list->data;
2766
2767                 if (selection->page == page)
2768                         return selection;
2769         }
2770
2771         return NULL;
2772 }
2773
2774 static void
2775 draw_end_presentation_page (EvView       *view,
2776                             GdkRectangle *page_area)
2777 {
2778         PangoLayout *layout;
2779         PangoFontDescription *font_desc;
2780         gchar *markup;
2781         const gchar *text = _("End of presentation. Press Escape to exit.");
2782
2783         if (view->presentation_state != EV_PRESENTATION_END)
2784                 return;
2785
2786         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
2787         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
2788         pango_layout_set_markup (layout, markup, -1);
2789         g_free (markup);
2790
2791         font_desc = pango_font_description_new ();
2792         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
2793         pango_layout_set_font_description (layout, font_desc);
2794
2795         gtk_paint_layout (GTK_WIDGET (view)->style,
2796                           view->layout.bin_window,
2797                           GTK_WIDGET_STATE (view),
2798                           FALSE,
2799                           page_area,
2800                           GTK_WIDGET (view),
2801                           NULL,
2802                           page_area->x + 15,
2803                           page_area->y + 15,
2804                           layout);
2805
2806         pango_font_description_free (font_desc);
2807         g_object_unref (layout);
2808 }
2809
2810 static gboolean
2811 ev_view_expose_event (GtkWidget      *widget,
2812                       GdkEventExpose *event)
2813 {
2814         EvView  *view = EV_VIEW (widget);
2815         cairo_t *cr;
2816         gint     i;
2817
2818         if (view->animation) {
2819                 if (ev_transition_animation_ready (view->animation)) {
2820                         GdkRectangle page_area;
2821                         GtkBorder    border;
2822
2823                         if (get_page_extents (view, view->current_page, &page_area, &border)) {
2824                                 cr = gdk_cairo_create (view->layout.bin_window);
2825
2826                                 /* normalize to x=0, y=0 */
2827                                 cairo_translate (cr, page_area.x, page_area.y);
2828                                 page_area.x = page_area.y = 0;
2829
2830                                 ev_transition_animation_paint (view->animation, cr, page_area);
2831                                 cairo_destroy (cr);
2832                         }
2833                 }
2834
2835                 return TRUE;
2836         }
2837
2838         if (view->presentation) {
2839                 switch (view->presentation_state) {
2840                         case EV_PRESENTATION_END: {
2841                                 GdkRectangle area = {0};
2842
2843                                 area.width = widget->allocation.width;
2844                                 area.height = widget->allocation.height;
2845
2846                                 draw_end_presentation_page (view, &area);
2847                         }
2848                                 return FALSE;
2849                         case EV_PRESENTATION_BLACK:
2850                         case EV_PRESENTATION_WHITE:
2851                                 return FALSE;
2852                         case EV_PRESENTATION_NORMAL:
2853                         default:
2854                                 break;
2855                 }
2856         } else if (view->loading) {
2857                 GdkRectangle area = {0};
2858
2859                 area.width = widget->allocation.width;
2860                 area.height = widget->allocation.height;
2861
2862                 draw_loading_text (view,
2863                                    &area,
2864                                    &(event->area));
2865         }
2866
2867         if (view->document == NULL)
2868                 return FALSE;
2869
2870         cr = gdk_cairo_create (view->layout.bin_window);
2871
2872         for (i = view->start_page; i <= view->end_page; i++) {
2873                 GdkRectangle page_area;
2874                 GtkBorder border;
2875                 gboolean page_ready = TRUE;
2876
2877                 if (!get_page_extents (view, i, &page_area, &border))
2878                         continue;
2879
2880                 page_area.x -= view->scroll_x;
2881                 page_area.y -= view->scroll_y;
2882
2883                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
2884
2885                 if (page_ready && view->find_pages && view->highlight_find_results)
2886                         highlight_find_results (view, i);
2887                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2888                         show_annotation_windows (view, i);
2889         }
2890
2891         cairo_destroy (cr);
2892
2893         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
2894                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
2895
2896         return FALSE;
2897 }
2898
2899 static gboolean
2900 ev_view_do_popup_menu (EvView *view,
2901                        gdouble x,
2902                        gdouble y)
2903 {
2904         EvLink  *link;
2905         EvImage *image;
2906
2907         image = ev_view_get_image_at_location (view, x, y);
2908         if (image) {
2909                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
2910                 return TRUE;
2911         }
2912
2913         link = ev_view_get_link_at_location (view, x, y);
2914         if (link) {
2915                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
2916                 return TRUE;
2917         }
2918
2919         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
2920
2921         return TRUE;
2922 }
2923
2924 static gboolean
2925 ev_view_popup_menu (GtkWidget *widget)
2926 {
2927         gint x, y;
2928
2929         gtk_widget_get_pointer (widget, &x, &y);
2930         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
2931 }
2932
2933 static void
2934 get_link_area (EvView       *view,
2935                gint          x,
2936                gint          y,
2937                EvLink       *link,
2938                GdkRectangle *area)
2939 {
2940         GList *link_mapping;
2941         gint   page;
2942         gint   x_offset = 0, y_offset = 0;
2943
2944         x += view->scroll_x;
2945         y += view->scroll_y;
2946
2947         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
2948
2949         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
2950         ev_view_get_area_from_mapping (view, page,
2951                                        link_mapping,
2952                                        link, area);
2953 }
2954
2955 static void
2956 get_annot_area (EvView       *view,
2957                gint          x,
2958                gint          y,
2959                EvAnnotation *annot,
2960                GdkRectangle *area)
2961 {
2962         GList *annots_mapping;
2963         gint   page;
2964         gint   x_offset = 0, y_offset = 0;
2965
2966         x += view->scroll_x;
2967         y += view->scroll_y;
2968
2969         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
2970
2971         annots_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2972         ev_view_get_area_from_mapping (view, page,
2973                                        annots_mapping,
2974                                        annot, area);
2975 }
2976
2977 static gboolean
2978 ev_view_query_tooltip (GtkWidget  *widget,
2979                        gint        x,
2980                        gint        y,
2981                        gboolean    keyboard_tip,
2982                        GtkTooltip *tooltip)
2983 {
2984         EvView       *view = EV_VIEW (widget);
2985         EvLink       *link;
2986         EvAnnotation *annot;
2987         gchar        *text;
2988
2989         annot = ev_view_get_annotation_at_location (view, x, y);
2990         if (annot && annot->contents) {
2991                 GdkRectangle annot_area;
2992
2993                 get_annot_area (view, x, y, annot, &annot_area);
2994                 gtk_tooltip_set_text (tooltip, annot->contents);
2995                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
2996
2997                 return TRUE;
2998         }
2999
3000         link = ev_view_get_link_at_location (view, x, y);
3001         if (!link)
3002                 return FALSE;
3003
3004         text = tip_from_link (view, link);
3005         if (text && g_utf8_validate (text, -1, NULL)) {
3006                 GdkRectangle link_area;
3007
3008                 get_link_area (view, x, y, link, &link_area);
3009                 gtk_tooltip_set_text (tooltip, text);
3010                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3011         }
3012         g_free (text);
3013
3014         return TRUE;
3015 }
3016
3017 static void
3018 start_selection_for_event (EvView         *view,
3019                            GdkEventButton *event)
3020 {
3021         clear_selection (view);
3022
3023         view->selection_info.start.x = event->x + view->scroll_x;
3024         view->selection_info.start.y = event->y + view->scroll_y;
3025
3026         switch (event->type) {
3027                 case GDK_2BUTTON_PRESS:
3028                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3029                         break;
3030                 case GDK_3BUTTON_PRESS:
3031                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3032                         break;
3033                 default:
3034                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3035                         return;
3036         }
3037
3038         /* In case of WORD or LINE, compute selections now */
3039         compute_selections (view,
3040                             view->selection_info.style,
3041                             &(view->selection_info.start),
3042                             &(view->selection_info.start));
3043 }
3044
3045 static gboolean
3046 ev_view_button_press_event (GtkWidget      *widget,
3047                             GdkEventButton *event)
3048 {
3049         EvView *view = EV_VIEW (widget);
3050
3051         if (!view->document)
3052                 return FALSE;
3053
3054         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3055                 gtk_widget_grab_focus (widget);
3056         }
3057
3058         if (view->window_child_focus) {
3059                 EvAnnotationWindow *window;
3060                 EvAnnotation       *annot;
3061
3062                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3063                 annot = ev_annotation_window_get_annotation (window);
3064                 ev_annotation_window_ungrab_focus (window);
3065                 ev_view_annotation_save (view, annot);
3066                 view->window_child_focus = NULL;
3067         }
3068
3069         view->pressed_button = event->button;
3070         view->selection_info.in_drag = FALSE;
3071
3072         if (view->scroll_info.autoscrolling)
3073                 return TRUE;
3074
3075         switch (event->button) {
3076                 case 1: {
3077                         EvImage *image;
3078                         EvAnnotation *annot;
3079                         EvFormField *field;
3080
3081                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3082                                 if (event->type == GDK_3BUTTON_PRESS) {
3083                                         start_selection_for_event (view, event);
3084                                 } else if (location_in_selected_text (view,
3085                                                                event->x + view->scroll_x,
3086                                                                event->y + view->scroll_y)) {
3087                                         view->selection_info.in_drag = TRUE;
3088                                 } else {
3089                                         start_selection_for_event (view, event);
3090                                 }
3091
3092                                 gtk_widget_queue_draw (widget);
3093                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3094                                 ev_view_handle_annotation (view, annot, event->x, event->y);
3095                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3096                                 ev_view_remove_all (view);
3097                                 ev_view_handle_form_field (view, field, event->x, event->y);
3098                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3099                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3100                                 if (view->image_dnd_info.image)
3101                                         g_object_unref (view->image_dnd_info.image);
3102                                 view->image_dnd_info.image = g_object_ref (image);
3103                                 view->image_dnd_info.in_drag = TRUE;
3104
3105                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3106                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3107                         } else {
3108                                 ev_view_remove_all (view);
3109
3110                                 if (EV_IS_SELECTION (view->document))
3111                                         start_selection_for_event (view, event);
3112                         }
3113                 }
3114                         return TRUE;
3115                 case 2:
3116                         /* use root coordinates as reference point because
3117                          * scrolling changes window relative coordinates */
3118                         view->drag_info.start.x = event->x_root;
3119                         view->drag_info.start.y = event->y_root;
3120                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3121                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3122
3123                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3124
3125                         return TRUE;
3126                 case 3:
3127                         view->scroll_info.start_y = event->y;
3128                         return ev_view_do_popup_menu (view, event->x, event->y);
3129         }
3130
3131         return FALSE;
3132 }
3133
3134 static void
3135 ev_view_remove_all (EvView *view)
3136 {
3137         GList *children, *child;
3138
3139         children = gtk_container_get_children (GTK_CONTAINER (view));
3140         for (child = children; child && child->data; child = g_list_next (child)) {
3141                 gtk_container_remove (GTK_CONTAINER (view),
3142                                       GTK_WIDGET (child->data));
3143         }
3144         g_list_free (children);
3145 }
3146
3147 /*** Drag and Drop ***/
3148 static void
3149 ev_view_drag_data_get (GtkWidget        *widget,
3150                        GdkDragContext   *context,
3151                        GtkSelectionData *selection_data,
3152                        guint             info,
3153                        guint             time)
3154 {
3155         EvView *view = EV_VIEW (widget);
3156
3157         switch (info) {
3158                 case TARGET_DND_TEXT:
3159                         if (EV_IS_SELECTION (view->document) &&
3160                             view->selection_info.selections) {
3161                                 gchar *text;
3162
3163                                 text = get_selected_text (view);
3164                                 gtk_selection_data_set_text (selection_data,
3165                                                              text,
3166                                                              strlen (text));
3167                                 g_free (text);
3168                         }
3169                         break;
3170                 case TARGET_DND_IMAGE:
3171                         if (view->image_dnd_info.image) {
3172                                 GdkPixbuf *pixbuf;
3173
3174                                 ev_document_doc_mutex_lock ();
3175                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3176                                                                        view->image_dnd_info.image);
3177                                 ev_document_doc_mutex_unlock ();
3178
3179                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3180                                 g_object_unref (pixbuf);
3181                         }
3182                         break;
3183                 case TARGET_DND_URI:
3184                         if (view->image_dnd_info.image) {
3185                                 GdkPixbuf   *pixbuf;
3186                                 const gchar *tmp_uri;
3187                                 gchar       *uris[2];
3188
3189                                 ev_document_doc_mutex_lock ();
3190                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3191                                                                        view->image_dnd_info.image);
3192                                 ev_document_doc_mutex_unlock ();
3193
3194                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3195                                 g_object_unref (pixbuf);
3196
3197                                 uris[0] = (gchar *)tmp_uri;
3198                                 uris[1] = NULL;
3199                                 gtk_selection_data_set_uris (selection_data, uris);
3200                         }
3201         }
3202 }
3203
3204 static gboolean
3205 ev_view_drag_motion (GtkWidget      *widget,
3206                      GdkDragContext *context,
3207                      gint            x,
3208                      gint            y,
3209                      guint           time)
3210 {
3211         if (gtk_drag_get_source_widget (context) == widget)
3212                 gdk_drag_status (context, 0, time);
3213         else
3214                 gdk_drag_status (context, context->suggested_action, time);
3215
3216         return TRUE;
3217 }
3218
3219 static gboolean
3220 selection_update_idle_cb (EvView *view)
3221 {
3222         compute_selections (view,
3223                             view->selection_info.style,
3224                             &view->selection_info.start,
3225                             &view->motion);
3226         view->selection_update_id = 0;
3227         return FALSE;
3228 }
3229
3230 static gboolean
3231 selection_scroll_timeout_cb (EvView *view)
3232 {
3233         gint x, y, shift = 0;
3234         GtkWidget *widget = GTK_WIDGET (view);
3235
3236         gtk_widget_get_pointer (widget, &x, &y);
3237
3238         if (y > widget->allocation.height) {
3239                 shift = (y - widget->allocation.height) / 2;
3240         } else if (y < 0) {
3241                 shift = y / 2;
3242         }
3243
3244         if (shift)
3245                 gtk_adjustment_set_value (view->vadjustment,
3246                                           CLAMP (view->vadjustment->value + shift,
3247                                           view->vadjustment->lower,
3248                                           view->vadjustment->upper -
3249                                           view->vadjustment->page_size));
3250
3251         if (x > widget->allocation.width) {
3252                 shift = (x - widget->allocation.width) / 2;
3253         } else if (x < 0) {
3254                 shift = x / 2;
3255         }
3256
3257         if (shift)
3258                 gtk_adjustment_set_value (view->hadjustment,
3259                                           CLAMP (view->hadjustment->value + shift,
3260                                           view->hadjustment->lower,
3261                                           view->hadjustment->upper -
3262                                           view->hadjustment->page_size));
3263
3264         return TRUE;
3265 }
3266
3267 static gboolean
3268 ev_view_drag_update_momentum (EvView *view)
3269 {
3270         int i;
3271         if (!view->drag_info.in_drag)
3272                 return FALSE;
3273
3274         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3275                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3276                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3277         }
3278
3279         /* Momentum is a moving average of 10ms granularity over
3280          * the last 100ms with each 10ms stored in buffer.
3281          */
3282
3283         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3284         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3285
3286         return TRUE;
3287 }
3288
3289 static gboolean
3290 ev_view_scroll_drag_release (EvView *view)
3291 {
3292         gdouble dhadj_value, dvadj_value;
3293         gdouble oldhadjustment, oldvadjustment;
3294
3295         view->drag_info.momentum.x /= 1.2;
3296         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3297
3298         dhadj_value = view->hadjustment->page_size *
3299                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
3300         dvadj_value = view->vadjustment->page_size *
3301                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
3302
3303         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3304         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3305
3306      /* When we reach the edges, we need either to absorb some momentum and bounce by
3307       * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3308      if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
3309            ((oldhadjustment + dhadj_value) < 0))
3310                 view->drag_info.momentum.x = 0;
3311         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
3312            ((oldvadjustment + dvadj_value) < 0))
3313                 view->drag_info.momentum.y = 0;
3314
3315         gtk_adjustment_set_value (view->hadjustment,
3316                                 MIN (oldhadjustment + dhadj_value,
3317                                 view->hadjustment->upper - view->hadjustment->page_size));
3318         gtk_adjustment_set_value (view->vadjustment,
3319                                 MIN (oldvadjustment + dvadj_value,
3320                                 view->vadjustment->upper - view->vadjustment->page_size));
3321
3322         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3323            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3324                 return FALSE;
3325         else
3326                 return TRUE;
3327 }
3328
3329 static gboolean
3330 ev_view_motion_notify_event (GtkWidget      *widget,
3331                              GdkEventMotion *event)
3332 {
3333         EvView *view = EV_VIEW (widget);
3334         gint x, y;
3335
3336         if (!view->document)
3337                 return FALSE;
3338
3339
3340         if (event->is_hint || event->window != view->layout.bin_window) {
3341             gtk_widget_get_pointer (widget, &x, &y);
3342         } else {
3343             x = event->x;
3344             y = event->y;
3345         }
3346
3347         if (view->scroll_info.autoscrolling) {
3348                 view->scroll_info.last_y = y;
3349                 return TRUE;
3350         }
3351
3352         if (view->selection_info.in_drag) {
3353                 if (gtk_drag_check_threshold (widget,
3354                                               view->selection_info.start.x,
3355                                               view->selection_info.start.y,
3356                                               x, y)) {
3357                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3358
3359                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3360
3361                         gtk_drag_begin (widget, target_list,
3362                                         GDK_ACTION_COPY,
3363                                         1, (GdkEvent *)event);
3364
3365                         view->selection_info.in_drag = FALSE;
3366
3367                         gtk_target_list_unref (target_list);
3368
3369                         return TRUE;
3370                 }
3371         } else if (view->image_dnd_info.in_drag) {
3372                 if (gtk_drag_check_threshold (widget,
3373                                               view->selection_info.start.x,
3374                                               view->selection_info.start.y,
3375                                               x, y)) {
3376                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3377
3378                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3379                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3380
3381                         gtk_drag_begin (widget, target_list,
3382                                         GDK_ACTION_COPY,
3383                                         1, (GdkEvent *)event);
3384
3385                         view->image_dnd_info.in_drag = FALSE;
3386
3387                         gtk_target_list_unref (target_list);
3388
3389                         return TRUE;
3390                 }
3391         }
3392
3393         switch (view->pressed_button) {
3394         case 1:
3395                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3396                  * documents only.
3397                  */
3398                 if (view->rotation != 0)
3399                         return FALSE;
3400
3401                 /* Schedule timeout to scroll during selection and additionally
3402                  * scroll once to allow arbitrary speed. */
3403                 if (!view->selection_scroll_id)
3404                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3405                                                                (GSourceFunc)selection_scroll_timeout_cb,
3406                                                                view);
3407                 else
3408                     selection_scroll_timeout_cb (view);
3409
3410                 view->selection_info.in_selection = TRUE;
3411                 view->motion.x = x + view->scroll_x;
3412                 view->motion.y = y + view->scroll_y;
3413
3414                 /* Queue an idle to handle the motion.  We do this because
3415                  * handling any selection events in the motion could be slower
3416                  * than new motion events reach us.  We always put it in the
3417                  * idle to make sure we catch up and don't visibly lag the
3418                  * mouse. */
3419                 if (!view->selection_update_id)
3420                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3421
3422                 return TRUE;
3423         case 2:
3424                 if (!view->drag_info.in_drag) {
3425                         gboolean start;
3426                         int i;
3427
3428                         start = gtk_drag_check_threshold (widget,
3429                                                           view->drag_info.start.x,
3430                                                           view->drag_info.start.y,
3431                                                           event->x_root,
3432                                                           event->y_root);
3433                         view->drag_info.in_drag = start;
3434                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3435                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3436                         /* Set 100 to choose how long it takes to build up momentum */
3437                         /* Clear out previous momentum info: */
3438                         for (i = 0; i < DRAG_HISTORY; i++) {
3439                                 view->drag_info.buffer[i].x = event->x;
3440                                 view->drag_info.buffer[i].y = event->y;
3441                         }
3442                         view->drag_info.momentum.x = 0;
3443                         view->drag_info.momentum.y = 0;
3444                 }
3445
3446                 if (view->drag_info.in_drag) {
3447                         int dx, dy;
3448                         gdouble dhadj_value, dvadj_value;
3449
3450                         view->drag_info.buffer[0].x = event->x;
3451                         view->drag_info.buffer[0].y = event->y;
3452
3453                         dx = event->x_root - view->drag_info.start.x;
3454                         dy = event->y_root - view->drag_info.start.y;
3455
3456                         dhadj_value = view->hadjustment->page_size *
3457                                       (gdouble)dx / widget->allocation.width;
3458                         dvadj_value = view->vadjustment->page_size *
3459                                       (gdouble)dy / widget->allocation.height;
3460
3461                         /* clamp scrolling to visible area */
3462                         gtk_adjustment_set_value (view->hadjustment,
3463                                                   MIN(view->drag_info.hadj - dhadj_value,
3464                                                       view->hadjustment->upper -
3465                                                       view->hadjustment->page_size));
3466                         gtk_adjustment_set_value (view->vadjustment,
3467                                                   MIN(view->drag_info.vadj - dvadj_value,
3468                                                       view->vadjustment->upper -
3469                                                       view->vadjustment->page_size));
3470
3471                         return TRUE;
3472                 }
3473
3474                 break;
3475         default:
3476                 ev_view_handle_cursor_over_xy (view, x, y);
3477         }
3478
3479         return FALSE;
3480 }
3481
3482 static gboolean
3483 ev_view_button_release_event (GtkWidget      *widget,
3484                               GdkEventButton *event)
3485 {
3486         EvView *view = EV_VIEW (widget);
3487         EvLink *link = NULL;
3488
3489         view->image_dnd_info.in_drag = FALSE;
3490
3491         if (view->scroll_info.autoscrolling) {
3492                 ev_view_autoscroll_stop (view);
3493                 view->pressed_button = -1;
3494
3495                 return TRUE;
3496         }
3497
3498         if (view->drag_info.in_drag) {
3499                 view->drag_info.release_timeout_id =
3500                         g_timeout_add (20,
3501                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3502         }
3503
3504         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3505                 link = ev_view_get_link_at_location (view, event->x, event->y);
3506         }
3507
3508         view->drag_info.in_drag = FALSE;
3509
3510         if (view->pressed_button == 2) {
3511                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3512         }
3513
3514         view->pressed_button = -1;
3515
3516         if (view->selection_scroll_id) {
3517             g_source_remove (view->selection_scroll_id);
3518             view->selection_scroll_id = 0;
3519         }
3520         if (view->selection_update_id) {
3521             g_source_remove (view->selection_update_id);
3522             view->selection_update_id = 0;
3523         }
3524
3525         if (view->selection_info.selections) {
3526                 clear_link_selected (view);
3527                 ev_view_update_primary_selection (view);
3528
3529                 if (view->selection_info.in_drag) {
3530                         clear_selection (view);
3531                         gtk_widget_queue_draw (widget);
3532                 }
3533
3534                 view->selection_info.in_drag = FALSE;
3535         } else if (link) {
3536                 if (event->button == 2) {
3537                         EvLinkAction    *action;
3538                         EvLinkActionType type;
3539
3540                         action = ev_link_get_action (link);
3541                         if (!action)
3542                                 return FALSE;
3543
3544                         type = ev_link_action_get_action_type (action);
3545                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3546                                 g_signal_emit (view,
3547                                                signals[SIGNAL_EXTERNAL_LINK],
3548                                                0, action);
3549                         }
3550                 } else {
3551                         ev_view_handle_link (view, link);
3552                 }
3553         } else if (view->presentation) {
3554                 switch (event->button) {
3555                         case 1:
3556                                 ev_view_next_page (view);
3557                                 return TRUE;
3558                         case 3:
3559                                 ev_view_previous_page (view);
3560                                 return TRUE;
3561                 }
3562         }
3563
3564         return FALSE;
3565 }
3566
3567 /* Goto Window */
3568 /* Cut and paste from gtkwindow.c */
3569 static void
3570 send_focus_change (GtkWidget *widget,
3571                    gboolean   in)
3572 {
3573         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3574
3575         g_object_ref (widget);
3576
3577         if (in)
3578                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3579         else
3580                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3581
3582         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3583         fevent->focus_change.window = g_object_ref (widget->window);
3584         fevent->focus_change.in = in;
3585
3586         gtk_widget_event (widget, fevent);
3587
3588         g_object_notify (G_OBJECT (widget), "has-focus");
3589
3590         g_object_unref (widget);
3591         gdk_event_free (fevent);
3592 }
3593
3594 static void
3595 ev_view_goto_window_hide (EvView *view)
3596 {
3597         /* send focus-in event */
3598         send_focus_change (view->goto_entry, FALSE);
3599         gtk_widget_hide (view->goto_window);
3600         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3601 }
3602
3603 static gboolean
3604 ev_view_goto_window_delete_event (GtkWidget   *widget,
3605                                   GdkEventAny *event,
3606                                   EvView      *view)
3607 {
3608         ev_view_goto_window_hide (view);
3609
3610         return TRUE;
3611 }
3612
3613 static gboolean
3614 key_is_numeric (guint keyval)
3615 {
3616         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3617                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3618 }
3619
3620 static gboolean
3621 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3622                                      GdkEventKey *event,
3623                                      EvView      *view)
3624 {
3625         switch (event->keyval) {
3626                 case GDK_Escape:
3627                 case GDK_Tab:
3628                 case GDK_KP_Tab:
3629                 case GDK_ISO_Left_Tab:
3630                         ev_view_goto_window_hide (view);
3631                         return TRUE;
3632                 case GDK_Return:
3633                 case GDK_KP_Enter:
3634                 case GDK_ISO_Enter:
3635                 case GDK_BackSpace:
3636                 case GDK_Delete:
3637                         return FALSE;
3638                 default:
3639                         if (!key_is_numeric (event->keyval))
3640                                 return TRUE;
3641         }
3642
3643         return FALSE;
3644 }
3645
3646 static gboolean
3647 ev_view_goto_window_button_press_event (GtkWidget      *widget,
3648                                         GdkEventButton *event,
3649                                         EvView         *view)
3650 {
3651         ev_view_goto_window_hide (view);
3652
3653         return TRUE;
3654 }
3655
3656 static void
3657 ev_view_goto_entry_activate (GtkEntry *entry,
3658                              EvView   *view)
3659 {
3660         const gchar *text;
3661         gint         page;
3662
3663         text = gtk_entry_get_text (entry);
3664         page = atoi (text) - 1;
3665
3666         ev_view_goto_window_hide (view);
3667
3668         if (page >= 0 &&
3669             page < ev_page_cache_get_n_pages (view->page_cache))
3670                 ev_page_cache_set_current_page (view->page_cache, page);
3671 }
3672
3673 static void
3674 ev_view_goto_window_create (EvView *view)
3675 {
3676         GtkWidget *frame, *hbox, *toplevel, *label;
3677
3678         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
3679
3680         if (view->goto_window) {
3681                 if (GTK_WINDOW (toplevel)->group)
3682                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3683                                                      GTK_WINDOW (view->goto_window));
3684                 else if (GTK_WINDOW (view->goto_window)->group)
3685                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
3686                                                         GTK_WINDOW (view->goto_window));
3687                 return;
3688         }
3689
3690         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
3691         gtk_window_set_screen (GTK_WINDOW (view->goto_window),
3692                                gtk_widget_get_screen (GTK_WIDGET (view)));
3693
3694         if (GTK_WINDOW (toplevel)->group)
3695                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3696                                              GTK_WINDOW (view->goto_window));
3697
3698         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
3699
3700         g_signal_connect (view->goto_window, "delete_event",
3701                           G_CALLBACK (ev_view_goto_window_delete_event),
3702                           view);
3703         g_signal_connect (view->goto_window, "key_press_event",
3704                           G_CALLBACK (ev_view_goto_window_key_press_event),
3705                           view);
3706         g_signal_connect (view->goto_window, "button_press_event",
3707                           G_CALLBACK (ev_view_goto_window_button_press_event),
3708                           view);
3709
3710         frame = gtk_frame_new (NULL);
3711         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
3712         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
3713         gtk_widget_show (frame);
3714
3715         hbox = gtk_hbox_new (FALSE, 0);
3716         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
3717         gtk_container_add (GTK_CONTAINER (frame), hbox);
3718         gtk_widget_show (hbox);
3719
3720         label = gtk_label_new(_("Jump to page:"));
3721         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
3722         gtk_widget_show (label);
3723         gtk_widget_realize (label);
3724
3725         view->goto_entry = gtk_entry_new ();
3726         g_signal_connect (view->goto_entry, "activate",
3727                           G_CALLBACK (ev_view_goto_entry_activate),
3728                           view);
3729         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
3730         gtk_widget_show (view->goto_entry);
3731         gtk_widget_realize (view->goto_entry);
3732 }
3733
3734 static void
3735 ev_view_goto_entry_grab_focus (EvView *view)
3736 {
3737         GtkWidgetClass *entry_parent_class;
3738
3739         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
3740         (entry_parent_class->grab_focus) (view->goto_entry);
3741
3742         send_focus_change (view->goto_entry, TRUE);
3743 }
3744
3745 static void
3746 ev_view_goto_window_send_key_event (EvView   *view,
3747                                     GdkEvent *event)
3748 {
3749         GdkEventKey *new_event;
3750         GdkScreen   *screen;
3751
3752         /* Move goto window off screen */
3753         screen = gtk_widget_get_screen (GTK_WIDGET (view));
3754         gtk_window_move (GTK_WINDOW (view->goto_window),
3755                          gdk_screen_get_width (screen) + 1,
3756                          gdk_screen_get_height (screen) + 1);
3757         gtk_widget_show (view->goto_window);
3758
3759         new_event = (GdkEventKey *) gdk_event_copy (event);
3760         g_object_unref (new_event->window);
3761         new_event->window = g_object_ref (view->goto_window->window);
3762         gtk_widget_realize (view->goto_window);
3763
3764         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
3765         gdk_event_free ((GdkEvent *)new_event);
3766         gtk_widget_hide (view->goto_window);
3767 }
3768
3769 static gboolean
3770 ev_view_key_press_event (GtkWidget   *widget,
3771                          GdkEventKey *event)
3772 {
3773         EvView *view = EV_VIEW (widget);
3774         EvPresentationState current;
3775
3776         if (!view->document)
3777                 return FALSE;
3778
3779         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3780                 /* Forward key events to current focused window child */
3781                 if (view->window_child_focus) {
3782                         GdkEventKey *new_event;
3783                         gboolean     handled;
3784
3785                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
3786                         g_object_unref (new_event->window);
3787                         new_event->window = g_object_ref (view->window_child_focus->window->window);
3788                         gtk_widget_realize (view->window_child_focus->window);
3789                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
3790                         gdk_event_free ((GdkEvent *)new_event);
3791
3792                         return handled;
3793                 }
3794
3795                 return FALSE;
3796         }
3797
3798         if (!view->presentation ||
3799             view->presentation_state == EV_PRESENTATION_END)
3800                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3801
3802
3803         current = view->presentation_state;
3804
3805         switch (event->keyval) {
3806                 case GDK_b:
3807                 case GDK_B:
3808                 case GDK_period:
3809                 case GDK_KP_Decimal:
3810                         view->presentation_state =
3811                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
3812                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
3813                         break;
3814                 case GDK_w:
3815                 case GDK_W:
3816                         view->presentation_state =
3817                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
3818                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
3819                         break;
3820                 default:
3821                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
3822                             view->presentation_state == EV_PRESENTATION_WHITE) {
3823                                 view->presentation_state = EV_PRESENTATION_NORMAL;
3824                         }
3825         }
3826
3827         if (current == view->presentation_state) {
3828                 if (ev_page_cache_get_n_pages (view->page_cache) > 1 &&
3829                     key_is_numeric (event->keyval)) {
3830                         gint x, y;
3831
3832                         ev_view_goto_window_create (view);
3833                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
3834                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
3835                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
3836                         gtk_widget_show (view->goto_window);
3837                         ev_view_goto_entry_grab_focus (view);
3838
3839                         return TRUE;
3840                 }
3841
3842                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3843         }
3844
3845         switch (view->presentation_state) {
3846                 case EV_PRESENTATION_NORMAL:
3847                 case EV_PRESENTATION_BLACK:
3848                         gdk_window_set_background (view->layout.bin_window,
3849                                                    &widget->style->black);
3850                         break;
3851                 case EV_PRESENTATION_WHITE:
3852                         gdk_window_set_background (view->layout.bin_window,
3853                                                    &widget->style->white);
3854                         break;
3855                 default:
3856                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3857         }
3858
3859         gtk_widget_queue_draw (widget);
3860         return TRUE;
3861 }
3862
3863 static gint
3864 ev_view_focus_in (GtkWidget     *widget,
3865                   GdkEventFocus *event)
3866 {
3867         if (EV_VIEW (widget)->pixbuf_cache)
3868                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3869         gtk_widget_queue_draw (widget);
3870
3871         return FALSE;
3872 }
3873
3874 static gint
3875 ev_view_focus_out (GtkWidget     *widget,
3876                      GdkEventFocus *event)
3877 {
3878         if (EV_VIEW (widget)->goto_window)
3879                 ev_view_goto_window_hide (EV_VIEW (widget));
3880
3881         if (EV_VIEW (widget)->pixbuf_cache)
3882                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3883         gtk_widget_queue_draw (widget);
3884
3885         return FALSE;
3886 }
3887
3888 static gboolean
3889 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3890 {
3891         EvView *view = EV_VIEW (widget);
3892
3893         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
3894                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3895
3896         return FALSE;
3897 }
3898
3899 static gboolean
3900 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3901 {
3902         EvView *view = EV_VIEW (widget);
3903
3904         ev_view_handle_cursor_over_xy (view, event->x, event->y);
3905
3906         return FALSE;
3907 }
3908
3909 static void
3910 ev_view_style_set (GtkWidget *widget,
3911                    GtkStyle  *old_style)
3912 {
3913         if (EV_VIEW (widget)->pixbuf_cache)
3914                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3915
3916         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
3917 }
3918
3919 /*** Drawing ***/
3920
3921 static guint32
3922 ev_gdk_color_to_rgb (const GdkColor *color)
3923 {
3924   guint32 result;
3925   result = (0xff0000 | (color->red & 0xff00));
3926   result <<= 8;
3927   result |= ((color->green & 0xff00) | (color->blue >> 8));
3928   return result;
3929 }
3930
3931 static void
3932 draw_rubberband (GtkWidget *widget, GdkWindow *window,
3933                  const GdkRectangle *rect, guchar alpha)
3934 {
3935         GdkGC *gc;
3936         GdkPixbuf *pixbuf;
3937         GdkColor *fill_color_gdk;
3938         guint fill_color;
3939
3940         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
3941         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
3942
3943         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
3944                                  rect->width, rect->height);
3945         gdk_pixbuf_fill (pixbuf, fill_color);
3946
3947         gdk_draw_pixbuf (window, NULL, pixbuf,
3948                          0, 0,
3949                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3950                          rect->width, rect->height,
3951                          GDK_RGB_DITHER_NONE,
3952                          0, 0);
3953
3954         g_object_unref (pixbuf);
3955
3956         gc = gdk_gc_new (window);
3957         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
3958         gdk_draw_rectangle (window, gc, FALSE,
3959                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3960                             rect->width - 1,
3961                             rect->height - 1);
3962         g_object_unref (gc);
3963
3964         gdk_color_free (fill_color_gdk);
3965 }
3966
3967
3968 static void
3969 highlight_find_results (EvView *view, int page)
3970 {
3971         gint i, n_results = 0;
3972
3973         n_results = ev_view_find_get_n_results (view, page);
3974
3975         for (i = 0; i < n_results; i++) {
3976                 EvRectangle *rectangle;
3977                 GdkRectangle view_rectangle;
3978                 guchar alpha;
3979
3980                 if (i == view->find_result && page == view->current_page) {
3981                         alpha = 0x90;
3982                 } else {
3983                         alpha = 0x20;
3984                 }
3985
3986                 rectangle = ev_view_find_get_result (view, page, i);
3987                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
3988                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
3989                                  &view_rectangle, alpha);
3990         }
3991 }
3992
3993 static void
3994 draw_loading_text (EvView       *view,
3995                    GdkRectangle *page_area,
3996                    GdkRectangle *expose_area)
3997 {
3998         cairo_t *cr;
3999         gint     width, height;
4000
4001         if (!view->loading_text) {
4002                 const gchar *loading_text = _("Loading...");
4003                 PangoLayout *layout;
4004                 PangoFontDescription *font_desc;
4005                 PangoRectangle logical_rect;
4006                 gint target_width;
4007                 gdouble real_scale;
4008
4009                 ev_document_fc_mutex_lock ();
4010
4011                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
4012
4013                 font_desc = pango_font_description_new ();
4014
4015                 /* We set the font to be 10 points, get the size, and scale appropriately */
4016                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
4017                 pango_layout_set_font_description (layout, font_desc);
4018                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4019
4020                 target_width = MAX (page_area->width / 2, 1);
4021                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
4022                 pango_font_description_set_size (font_desc, (int)real_scale);
4023                 pango_layout_set_font_description (layout, font_desc);
4024                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4025
4026                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
4027                                                                  logical_rect.width,
4028                                                                  logical_rect.height);
4029                 cr = cairo_create (view->loading_text);
4030                 cairo_set_source_rgb (cr,
4031                                       155 / (double)255,
4032                                       155 / (double)255,
4033                                       155 / (double)255);
4034                 pango_cairo_show_layout (cr, layout);
4035                 cairo_destroy (cr);
4036
4037                 pango_font_description_free (font_desc);
4038                 g_object_unref (layout);
4039
4040                 ev_document_fc_mutex_unlock ();
4041         }
4042
4043         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
4044         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
4045
4046         cr = gdk_cairo_create (view->layout.bin_window);
4047         cairo_translate (cr,
4048                          page_area->x + width,
4049                          page_area->y + height);
4050         cairo_set_source_surface (cr, view->loading_text, 0, 0);
4051         cairo_paint (cr);
4052         cairo_destroy (cr);
4053 }
4054
4055 static void
4056 draw_one_page (EvView       *view,
4057                gint          page,
4058                cairo_t      *cr,
4059                GdkRectangle *page_area,
4060                GtkBorder    *border,
4061                GdkRectangle *expose_area,
4062                gboolean     *page_ready)
4063 {
4064         GdkRectangle overlap;
4065         GdkRectangle real_page_area;
4066
4067         g_assert (view->document);
4068
4069         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4070                 return;
4071
4072         /* Render the document itself */
4073         real_page_area = *page_area;
4074
4075         real_page_area.x += border->left;
4076         real_page_area.y += border->top;
4077         real_page_area.width -= (border->left + border->right);
4078         real_page_area.height -= (border->top + border->bottom);
4079         *page_ready = TRUE;
4080
4081         if (!view->presentation) {
4082                 gint current_page;
4083
4084                 current_page = ev_page_cache_get_current_page (view->page_cache);
4085                 ev_document_misc_paint_one_page (view->layout.bin_window,
4086                                                  GTK_WIDGET (view),
4087                                                  page_area, border,
4088                                                  page == current_page);
4089         }
4090
4091         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4092                 gint             width, height;
4093                 gint             page_width, page_height;
4094                 cairo_surface_t *page_surface = NULL;
4095                 gint             selection_width, selection_height;
4096                 cairo_surface_t *selection_surface = NULL;
4097
4098                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4099
4100                 if (!page_surface) {
4101                         if (!view->presentation) {
4102                                 draw_loading_text (view,
4103                                                    &real_page_area,
4104                                                    expose_area);
4105                         }
4106
4107                         *page_ready = FALSE;
4108
4109                         return;
4110                 }
4111
4112                 ev_page_cache_get_size (view->page_cache,
4113                                         page, view->rotation,
4114                                         view->scale,
4115                                         &width, &height);
4116
4117                 page_width = cairo_image_surface_get_width (page_surface);
4118                 page_height = cairo_image_surface_get_height (page_surface);
4119
4120                 cairo_save (cr);
4121                 cairo_translate (cr, overlap.x, overlap.y);
4122
4123                 if (width != page_width || height != page_height) {
4124                         cairo_pattern_set_filter (cairo_get_source (cr),
4125                                                   CAIRO_FILTER_FAST);
4126                         cairo_scale (cr,
4127                                      (gdouble)width / page_width,
4128                                      (gdouble)height / page_height);
4129                 }
4130
4131                 cairo_surface_set_device_offset (page_surface,
4132                                                  overlap.x - real_page_area.x,
4133                                                  overlap.y - real_page_area.y);
4134                 cairo_set_source_surface (cr, page_surface, 0, 0);
4135                 cairo_paint (cr);
4136                 cairo_restore (cr);
4137
4138                 /* Get the selection pixbuf iff we have something to draw */
4139                 if (find_selection_for_page (view, page) &&
4140                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4141                         selection_surface =
4142                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4143                                                                        page,
4144                                                                        view->scale,
4145                                                                        NULL);
4146                 }
4147
4148                 if (!selection_surface) {
4149                         return;
4150                 }
4151
4152                 selection_width = cairo_image_surface_get_width (selection_surface);
4153                 selection_height = cairo_image_surface_get_height (selection_surface);
4154
4155                 cairo_save (cr);
4156                 cairo_translate (cr, overlap.x, overlap.y);
4157
4158                 if (width != selection_width || height != selection_height) {
4159                         cairo_pattern_set_filter (cairo_get_source (cr),
4160                                                   CAIRO_FILTER_FAST);
4161                         cairo_scale (cr,
4162                                      (gdouble)width / selection_width,
4163                                      (gdouble)height / selection_height);
4164                 }
4165
4166                 cairo_surface_set_device_offset (selection_surface,
4167                                                  overlap.x - real_page_area.x,
4168                                                  overlap.y - real_page_area.y);
4169                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4170                 cairo_paint (cr);
4171                 cairo_restore (cr);
4172         }
4173 }
4174
4175 /*** GObject functions ***/
4176
4177 static void
4178 ev_view_finalize (GObject *object)
4179 {
4180         EvView *view = EV_VIEW (object);
4181
4182         clear_selection (view);
4183         clear_link_selected (view);
4184
4185         if (view->image_dnd_info.image)
4186                 g_object_unref (view->image_dnd_info.image);
4187         view->image_dnd_info.image = NULL;
4188
4189         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4190 }
4191
4192 static void
4193 ev_view_destroy (GtkObject *object)
4194 {
4195         EvView *view = EV_VIEW (object);
4196
4197         if (view->document) {
4198                 g_object_unref (view->document);
4199                 view->document = NULL;
4200         }
4201
4202         if (view->pixbuf_cache) {
4203                 g_object_unref (view->pixbuf_cache);
4204                 view->pixbuf_cache = NULL;
4205         }
4206
4207         if (view->goto_window) {
4208                 gtk_widget_destroy (view->goto_window);
4209                 view->goto_window = NULL;
4210                 view->goto_entry = NULL;
4211         }
4212
4213         ev_view_window_children_free (view);
4214
4215         if (view->selection_scroll_id) {
4216             g_source_remove (view->selection_scroll_id);
4217             view->selection_scroll_id = 0;
4218         }
4219
4220         if (view->selection_update_id) {
4221             g_source_remove (view->selection_update_id);
4222             view->selection_update_id = 0;
4223         }
4224
4225         if (view->loading_text) {
4226                 cairo_surface_destroy (view->loading_text);
4227                 view->loading_text = NULL;
4228         }
4229
4230         if (view->scroll_info.timeout_id) {
4231             g_source_remove (view->scroll_info.timeout_id);
4232             view->scroll_info.timeout_id = 0;
4233         }
4234
4235         if (view->drag_info.drag_timeout_id) {
4236                 g_source_remove (view->drag_info.drag_timeout_id);
4237                 view->drag_info.drag_timeout_id = 0;
4238         }
4239
4240         if (view->drag_info.release_timeout_id) {
4241                 g_source_remove (view->drag_info.release_timeout_id);
4242                 view->drag_info.release_timeout_id = 0;
4243         }
4244
4245         ev_view_presentation_transition_stop (view);
4246
4247         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4248
4249         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4250 }
4251
4252 static void
4253 ev_view_set_property (GObject      *object,
4254                       guint         prop_id,
4255                       const GValue *value,
4256                       GParamSpec   *pspec)
4257 {
4258         EvView *view = EV_VIEW (object);
4259
4260         switch (prop_id) {
4261                 case PROP_CONTINUOUS:
4262                         ev_view_set_continuous (view, g_value_get_boolean (value));
4263                         break;
4264                 case PROP_DUAL_PAGE:
4265                         ev_view_set_dual_page (view, g_value_get_boolean (value));
4266                         break;
4267                 case PROP_FULLSCREEN:
4268                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
4269                         break;
4270                 case PROP_PRESENTATION:
4271                         ev_view_set_presentation (view, g_value_get_boolean (value));
4272                         break;
4273                 case PROP_SIZING_MODE:
4274                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
4275                         break;
4276                 case PROP_ZOOM:
4277                         ev_view_set_zoom (view, g_value_get_double (value), FALSE);
4278                         break;
4279                 case PROP_ROTATION:
4280                         ev_view_set_rotation (view, g_value_get_int (value));
4281                         break;
4282                 default:
4283                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4284         }
4285 }
4286
4287 static AtkObject *
4288 ev_view_get_accessible (GtkWidget *widget)
4289 {
4290         static gboolean first_time = TRUE;
4291
4292         if (first_time) {
4293                 AtkObjectFactory *factory;
4294                 AtkRegistry *registry;
4295                 GType derived_type;
4296                 GType derived_atk_type;
4297
4298                 /*
4299                  * Figure out whether accessibility is enabled by looking at the
4300                  * type of the accessible object which would be created for
4301                  * the parent type of EvView.
4302                  */
4303                 derived_type = g_type_parent (EV_TYPE_VIEW);
4304
4305                 registry = atk_get_default_registry ();
4306                 factory = atk_registry_get_factory (registry,
4307                                                     derived_type);
4308                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4309                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4310                         atk_registry_set_factory_type (registry,
4311                                                        EV_TYPE_VIEW,
4312                                                        ev_view_accessible_factory_get_type ());
4313                 first_time = FALSE;
4314         }
4315         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4316 }
4317
4318 static void
4319 ev_view_get_property (GObject *object,
4320                       guint prop_id,
4321                       GValue *value,
4322                       GParamSpec *pspec)
4323 {
4324         EvView *view = EV_VIEW (object);
4325
4326         switch (prop_id) {
4327                 case PROP_CONTINUOUS:
4328                         g_value_set_boolean (value, view->continuous);
4329                         break;
4330                 case PROP_DUAL_PAGE:
4331                         g_value_set_boolean (value, view->dual_page);
4332                         break;
4333                 case PROP_FULLSCREEN:
4334                         g_value_set_boolean (value, view->fullscreen);
4335                         break;
4336                 case PROP_PRESENTATION:
4337                         g_value_set_boolean (value, view->presentation);
4338                         break;
4339                 case PROP_SIZING_MODE:
4340                         g_value_set_enum (value, view->sizing_mode);
4341                         break;
4342                 case PROP_ZOOM:
4343                         g_value_set_double (value, view->scale);
4344                         break;
4345                 case PROP_ROTATION:
4346                         g_value_set_int (value, view->rotation);
4347                         break;
4348                 case PROP_HAS_SELECTION:
4349                         g_value_set_boolean (value,
4350                                              view->selection_info.selections != NULL);
4351                         break;
4352                 default:
4353                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4354         }
4355 }
4356
4357 static void
4358 ev_view_class_init (EvViewClass *class)
4359 {
4360         GObjectClass *object_class = G_OBJECT_CLASS (class);
4361         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4362         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4363         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4364         GtkBindingSet *binding_set;
4365
4366         object_class->finalize = ev_view_finalize;
4367         object_class->set_property = ev_view_set_property;
4368         object_class->get_property = ev_view_get_property;
4369
4370         widget_class->expose_event = ev_view_expose_event;
4371         widget_class->button_press_event = ev_view_button_press_event;
4372         widget_class->motion_notify_event = ev_view_motion_notify_event;
4373         widget_class->button_release_event = ev_view_button_release_event;
4374         widget_class->key_press_event = ev_view_key_press_event;
4375         widget_class->focus_in_event = ev_view_focus_in;
4376         widget_class->focus_out_event = ev_view_focus_out;
4377         widget_class->get_accessible = ev_view_get_accessible;
4378         widget_class->size_request = ev_view_size_request;
4379         widget_class->size_allocate = ev_view_size_allocate;
4380         widget_class->realize = ev_view_realize;
4381         widget_class->scroll_event = ev_view_scroll_event;
4382         widget_class->enter_notify_event = ev_view_enter_notify_event;
4383         widget_class->leave_notify_event = ev_view_leave_notify_event;
4384         widget_class->style_set = ev_view_style_set;
4385         widget_class->drag_data_get = ev_view_drag_data_get;
4386         widget_class->drag_motion = ev_view_drag_motion;
4387         widget_class->popup_menu = ev_view_popup_menu;
4388         widget_class->query_tooltip = ev_view_query_tooltip;
4389
4390         gtk_object_class->destroy = ev_view_destroy;
4391
4392         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4393
4394         class->binding_activated = ev_view_scroll;
4395
4396         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4397                          G_TYPE_FROM_CLASS (object_class),
4398                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4399                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4400                          NULL, NULL,
4401                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4402                          G_TYPE_NONE, 2,
4403                          GTK_TYPE_SCROLL_TYPE,
4404                          G_TYPE_BOOLEAN);
4405
4406         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
4407                          G_TYPE_FROM_CLASS (object_class),
4408                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4409                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
4410                          NULL, NULL,
4411                          g_cclosure_marshal_VOID__VOID,
4412                          G_TYPE_NONE, 0, G_TYPE_NONE);
4413         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4414                          G_TYPE_FROM_CLASS (object_class),
4415                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4416                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4417                          NULL, NULL,
4418                          g_cclosure_marshal_VOID__OBJECT,
4419                          G_TYPE_NONE, 1,
4420                          G_TYPE_OBJECT);
4421         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4422                          G_TYPE_FROM_CLASS (object_class),
4423                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4424                          G_STRUCT_OFFSET (EvViewClass, external_link),
4425                          NULL, NULL,
4426                          g_cclosure_marshal_VOID__OBJECT,
4427                          G_TYPE_NONE, 1,
4428                          G_TYPE_OBJECT);
4429         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4430                          G_TYPE_FROM_CLASS (object_class),
4431                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4432                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4433                          NULL, NULL,
4434                          g_cclosure_marshal_VOID__OBJECT,
4435                          G_TYPE_NONE, 1,
4436                          G_TYPE_OBJECT);
4437
4438
4439         g_object_class_install_property (object_class,
4440                                          PROP_CONTINUOUS,
4441                                          g_param_spec_boolean ("continuous",
4442                                                                "Continuous",
4443                                                                "Continuous scrolling mode",
4444                                                                TRUE,
4445                                                                G_PARAM_READWRITE));
4446
4447         g_object_class_install_property (object_class,
4448                                          PROP_DUAL_PAGE,
4449                                          g_param_spec_boolean ("dual-page",
4450                                                                "Dual Page",
4451                                                                "Two pages visible at once",
4452                                                                FALSE,
4453                                                                G_PARAM_READWRITE));
4454         g_object_class_install_property (object_class,
4455                                          PROP_FULLSCREEN,
4456                                          g_param_spec_boolean ("fullscreen",
4457                                                                "Full Screen",
4458                                                                "Draw page in a fullscreen fashion",
4459                                                                FALSE,
4460                                                                G_PARAM_READWRITE));
4461         g_object_class_install_property (object_class,
4462                                          PROP_PRESENTATION,
4463                                          g_param_spec_boolean ("presentation",
4464                                                                "Presentation",
4465                                                                "Draw page in presentation mode",
4466                                                                TRUE,
4467                                                                G_PARAM_READWRITE));
4468
4469         g_object_class_install_property (object_class,
4470                                          PROP_SIZING_MODE,
4471                                          g_param_spec_enum ("sizing-mode",
4472                                                             "Sizing Mode",
4473                                                             "Sizing Mode",
4474                                                             EV_TYPE_SIZING_MODE,
4475                                                             EV_SIZING_FIT_WIDTH,
4476                                                             G_PARAM_READWRITE));
4477
4478         g_object_class_install_property (object_class,
4479                                          PROP_ZOOM,
4480                                          g_param_spec_double ("zoom",
4481                                                               "Zoom factor",
4482                                                               "Zoom factor",
4483                                                               0,
4484                                                               G_MAXDOUBLE,
4485                                                               1.0,
4486                                                               G_PARAM_READWRITE));
4487         g_object_class_install_property (object_class,
4488                                          PROP_ROTATION,
4489                                          g_param_spec_double ("rotation",
4490                                                               "Rotation",
4491                                                               "Rotation",
4492                                                               0,
4493                                                               360,
4494                                                               0,
4495                                                               G_PARAM_READWRITE));
4496         g_object_class_install_property (object_class,
4497                                          PROP_HAS_SELECTION,
4498                                          g_param_spec_boolean ("has-selection",
4499                                                                "Has selection",
4500                                                                "The view has selections",
4501                                                                FALSE,
4502                                                                G_PARAM_READABLE));
4503
4504         binding_set = gtk_binding_set_by_class (class);
4505
4506         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4507         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4508         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4509         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4510         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4511         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4512         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4513         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4514         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4515                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4516         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4517                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4518         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4519                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4520         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4521                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4522
4523 }
4524
4525 static void
4526 ev_view_init (EvView *view)
4527 {
4528         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4529
4530         view->start_page = -1;
4531         view->end_page = -1;
4532         view->spacing = 5;
4533         view->scale = 1.0;
4534         view->current_page = 0;
4535         view->pressed_button = -1;
4536         view->cursor = EV_VIEW_CURSOR_NORMAL;
4537         view->drag_info.in_drag = FALSE;
4538         view->scroll_info.autoscrolling = FALSE;
4539         view->selection_info.selections = NULL;
4540         view->selection_info.in_selection = FALSE;
4541         view->selection_info.in_drag = FALSE;
4542         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4543         view->continuous = TRUE;
4544         view->dual_page = FALSE;
4545         view->presentation = FALSE;
4546         view->presentation_state = EV_PRESENTATION_NORMAL;
4547         view->fullscreen = FALSE;
4548         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4549         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4550         view->jump_to_find_result = TRUE;
4551         view->highlight_find_results = FALSE;
4552
4553         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4554         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4555 }
4556
4557 /*** Callbacks ***/
4558
4559 static void
4560 ev_view_change_page (EvView *view,
4561                      gint    new_page,
4562                      gboolean start_transition)
4563 {
4564         gint x, y;
4565
4566         view->current_page = new_page;
4567         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4568
4569         if (view->presentation && start_transition)
4570                 ev_view_presentation_transition_start (view);
4571
4572         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4573         ev_view_handle_cursor_over_xy (view, x, y);
4574
4575         gtk_widget_queue_resize (GTK_WIDGET (view));
4576 }
4577
4578 static void
4579 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4580                                      EvView                *view)
4581 {
4582         g_object_unref (view->animation);
4583         view->animation = NULL;
4584         ev_view_change_page (view, view->current_page, TRUE);
4585 }
4586
4587 /**
4588  * ev_view_transition_animation_cancel:
4589  * @animation: Animation to finish
4590  * @view: An EvView
4591  *
4592  * Does almost the same as cancel, but without scheduling the transition.
4593  */
4594
4595 static void
4596 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4597                                      EvView                *view)
4598 {
4599         g_object_unref (view->animation);
4600         view->animation = NULL;
4601         ev_view_change_page (view, view->current_page, FALSE);
4602 }
4603
4604 static void
4605 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4606                                     gdouble                progress,
4607                                     EvView                *view)
4608 {
4609         gtk_widget_queue_draw (GTK_WIDGET (view));
4610 }
4611
4612 static void
4613 ev_view_presentation_animation_start (EvView *view,
4614                                       int     new_page)
4615 {
4616         EvTransitionEffect *effect = NULL;
4617         cairo_surface_t *surface;
4618
4619         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4620                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4621                                                             view->current_page);
4622         if (!effect)
4623                 return;
4624
4625         view->animation = ev_transition_animation_new (effect);
4626
4627         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4628         ev_transition_animation_set_origin_surface (view->animation, surface);
4629         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, new_page);
4630         if (surface)
4631                 ev_transition_animation_set_dest_surface (view->animation, surface);
4632
4633         g_signal_connect (view->animation, "frame",
4634                           G_CALLBACK (ev_view_transition_animation_frame), view);
4635         g_signal_connect (view->animation, "finished",
4636                           G_CALLBACK (ev_view_transition_animation_finish), view);
4637 }
4638
4639 static void
4640 job_finished_cb (EvPixbufCache *pixbuf_cache,
4641                  GdkRegion     *region,
4642                  EvView        *view)
4643 {
4644         if (view->animation) {
4645                 cairo_surface_t *surface;
4646
4647                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4648                 ev_transition_animation_set_dest_surface (view->animation, surface);
4649         }
4650
4651         if (region) {
4652                 gdk_window_invalidate_region (view->layout.bin_window,
4653                                               region, TRUE);
4654         } else {
4655                 gtk_widget_queue_draw (GTK_WIDGET (view));
4656         }
4657 }
4658
4659 static void
4660 page_changed_cb (EvPageCache *page_cache,
4661                  int          new_page,
4662                  EvView      *view)
4663 {
4664         if (view->current_page != new_page) {
4665                 if (view->presentation)
4666                         ev_view_presentation_animation_start (view, new_page);
4667
4668                 ev_view_change_page (view, new_page, TRUE);
4669         } else {
4670                 gtk_widget_queue_draw (GTK_WIDGET (view));
4671         }
4672
4673         view->find_result = 0;
4674 }
4675
4676 static void
4677 on_adjustment_value_changed (GtkAdjustment *adjustment,
4678                              EvView        *view)
4679 {
4680         int dx = 0, dy = 0;
4681         gint x, y;
4682         GList *children, *l;
4683
4684         if (! GTK_WIDGET_REALIZED (view))
4685                 return;
4686
4687         if (view->hadjustment) {
4688                 dx = view->scroll_x - (int) view->hadjustment->value;
4689                 view->scroll_x = (int) view->hadjustment->value;
4690         } else {
4691                 view->scroll_x = 0;
4692         }
4693
4694         if (view->vadjustment) {
4695                 dy = view->scroll_y - (int) view->vadjustment->value;
4696                 view->scroll_y = (int) view->vadjustment->value;
4697         } else {
4698                 view->scroll_y = 0;
4699         }
4700
4701         children = gtk_container_get_children (GTK_CONTAINER (view));
4702         for (l = children; l && l->data; l = g_list_next (l)) {
4703                 gint       child_x, child_y;
4704                 GtkWidget *child = (GtkWidget *)l->data;
4705
4706                 gtk_container_child_get (GTK_CONTAINER (view),
4707                                          child,
4708                                          "x", &child_x,
4709                                          "y", &child_y,
4710                                          NULL);
4711                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4712         }
4713         g_list_free (children);
4714
4715         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4716                 EvViewWindowChild *child;
4717
4718                 child = (EvViewWindowChild *)l->data;
4719
4720                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4721         }
4722
4723         if (view->pending_resize)
4724                 gtk_widget_queue_draw (GTK_WIDGET (view));
4725         else
4726                 gdk_window_scroll (view->layout.bin_window, dx, dy);
4727
4728         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4729         ev_view_handle_cursor_over_xy (view, x, y);
4730
4731         if (view->document)
4732                 view_update_range_and_current_page (view);
4733 }
4734
4735 GtkWidget*
4736 ev_view_new (void)
4737 {
4738         GtkWidget *view;
4739
4740         view = g_object_new (EV_TYPE_VIEW, NULL);
4741
4742         return view;
4743 }
4744
4745 static void
4746 setup_caches (EvView *view)
4747 {
4748         view->page_cache = ev_page_cache_get (view->document);
4749         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
4750         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
4751         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4752         page_changed_cb (view->page_cache,
4753                          ev_page_cache_get_current_page (view->page_cache),
4754                          view);
4755 }
4756
4757 static void
4758 clear_caches (EvView *view)
4759 {
4760         if (view->pixbuf_cache) {
4761                 g_object_unref (view->pixbuf_cache);
4762                 view->pixbuf_cache = NULL;
4763         }
4764
4765         if (view->page_cache) {
4766                 view->page_cache = NULL;
4767         }
4768 }
4769
4770 void
4771 ev_view_set_loading (EvView       *view,
4772                      gboolean      loading)
4773 {
4774         view->loading = loading;
4775         gtk_widget_queue_draw (GTK_WIDGET (view));
4776 }
4777
4778 static gboolean
4779 ev_view_autoscroll_cb (EvView *view)
4780 {
4781         gdouble speed, value;
4782
4783         /* If the user stops autoscrolling, autoscrolling will be
4784          * set to false but the timeout will continue; stop the timeout: */
4785         if (!view->scroll_info.autoscrolling) {
4786                 view->scroll_info.timeout_id = 0;
4787                 return FALSE;
4788         }
4789
4790         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4791                 (view->scroll_info.last_y < view->scroll_info.start_y))
4792                 return TRUE;
4793
4794         /* Replace 100 with your speed of choice: The lower the faster.
4795          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4796          *      based on the distance of the starting point from the mouse
4797          * (All also effected by the timeout interval of this callback) */
4798
4799         if (view->scroll_info.start_y > view->scroll_info.last_y)
4800                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
4801         else
4802                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
4803
4804         value = gtk_adjustment_get_value (view->vadjustment);
4805         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
4806         gtk_adjustment_set_value (view->vadjustment, value);
4807
4808         return TRUE;
4809
4810 }
4811
4812 void
4813 ev_view_autoscroll_start (EvView *view)
4814 {
4815         gint x, y;
4816
4817         g_return_if_fail (EV_IS_VIEW (view));
4818
4819         if (view->scroll_info.autoscrolling)
4820                 return;
4821
4822         view->scroll_info.autoscrolling = TRUE;
4823         view->scroll_info.timeout_id =
4824                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
4825                                view);
4826
4827         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4828         ev_view_handle_cursor_over_xy (view, x, y);
4829 }
4830
4831 void
4832 ev_view_autoscroll_stop (EvView *view)
4833 {
4834         gint x, y;
4835
4836         g_return_if_fail (EV_IS_VIEW (view));
4837
4838         if (!view->scroll_info.autoscrolling)
4839                 return;
4840
4841         view->scroll_info.autoscrolling = FALSE;
4842         if (view->scroll_info.timeout_id) {
4843                 g_source_remove (view->scroll_info.timeout_id);
4844                 view->scroll_info.timeout_id = 0;
4845         }
4846
4847         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4848         ev_view_handle_cursor_over_xy (view, x, y);
4849 }
4850
4851 void
4852 ev_view_set_document (EvView     *view,
4853                       EvDocument *document)
4854 {
4855         g_return_if_fail (EV_IS_VIEW (view));
4856
4857         view->loading = FALSE;
4858
4859         if (document != view->document) {
4860                 clear_caches (view);
4861
4862                 if (view->document) {
4863                         g_object_unref (view->document);
4864                         view->page_cache = NULL;
4865                 }
4866
4867                 view->document = document;
4868                 view->find_result = 0;
4869
4870                 if (view->document) {
4871                         g_object_ref (view->document);
4872                         setup_caches (view);
4873                 }
4874
4875                 view_update_range_and_current_page (view);
4876
4877                 gtk_widget_queue_resize (GTK_WIDGET (view));
4878         }
4879 }
4880
4881 static void
4882 ev_view_reload_page (EvView    *view,
4883                      gint       page,
4884                      GdkRegion *region)
4885 {
4886         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
4887                                      region,
4888                                      page,
4889                                      view->rotation,
4890                                      view->scale);
4891 }
4892
4893 void
4894 ev_view_reload (EvView *view)
4895 {
4896         ev_pixbuf_cache_clear (view->pixbuf_cache);
4897         view_update_range_and_current_page (view);
4898 }
4899
4900 /*** Zoom and sizing mode ***/
4901
4902 #define EPSILON 0.0000001
4903 void
4904 ev_view_set_zoom (EvView   *view,
4905                   double    factor,
4906                   gboolean  relative)
4907 {
4908         double scale;
4909
4910         if (relative)
4911                 scale = view->scale * factor;
4912         else
4913                 scale = factor;
4914
4915         scale = CLAMP (scale,
4916                        view->sizing_mode == EV_SIZING_FREE ? view->min_scale : 0,
4917                        view->max_scale);
4918
4919         if (scale == view->scale)
4920                 return;
4921
4922         if (ABS (view->scale - scale) < EPSILON)
4923                 return;
4924
4925         if (view->loading_text) {
4926                 cairo_surface_destroy (view->loading_text);
4927                 view->loading_text = NULL;
4928         }
4929
4930         view->scale = scale;
4931         view->pending_resize = TRUE;
4932
4933         gtk_widget_queue_resize (GTK_WIDGET (view));
4934
4935         g_object_notify (G_OBJECT (view), "zoom");
4936 }
4937
4938 double
4939 ev_view_get_zoom (EvView *view)
4940 {
4941         return view->scale;
4942 }
4943
4944 void
4945 ev_view_set_screen_dpi (EvView  *view,
4946                         gdouble  dpi)
4947 {
4948         g_return_if_fail (EV_IS_VIEW (view));
4949         g_return_if_fail (dpi > 0);
4950
4951         view->dpi = dpi;
4952         view->min_scale = MIN_SCALE * dpi / 72.0;
4953         view->max_scale = MAX_SCALE * dpi / 72.0;
4954 }
4955
4956 gboolean
4957 ev_view_get_continuous (EvView *view)
4958 {
4959         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4960
4961         return view->continuous;
4962 }
4963
4964 void
4965 ev_view_set_continuous (EvView   *view,
4966                         gboolean  continuous)
4967 {
4968         g_return_if_fail (EV_IS_VIEW (view));
4969
4970         continuous = continuous != FALSE;
4971
4972         if (view->continuous != continuous) {
4973                 view->continuous = continuous;
4974                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4975                 gtk_widget_queue_resize (GTK_WIDGET (view));
4976         }
4977
4978         g_object_notify (G_OBJECT (view), "continuous");
4979 }
4980
4981 gboolean
4982 ev_view_get_dual_page (EvView *view)
4983 {
4984         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4985
4986         return view->dual_page;
4987 }
4988
4989 void
4990 ev_view_set_dual_page (EvView   *view,
4991                        gboolean  dual_page)
4992 {
4993         g_return_if_fail (EV_IS_VIEW (view));
4994
4995         dual_page = dual_page != FALSE;
4996
4997         if (view->dual_page == dual_page)
4998                 return;
4999
5000         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5001         view->dual_page = dual_page;
5002         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5003          * preload_cache_size to be 2 if dual_page is set.
5004          */
5005         gtk_widget_queue_resize (GTK_WIDGET (view));
5006
5007         g_object_notify (G_OBJECT (view), "dual-page");
5008 }
5009
5010 void
5011 ev_view_set_fullscreen (EvView   *view,
5012                          gboolean  fullscreen)
5013 {
5014         g_return_if_fail (EV_IS_VIEW (view));
5015
5016         fullscreen = fullscreen != FALSE;
5017
5018         if (view->fullscreen == fullscreen)
5019                 return;
5020
5021         view->fullscreen = fullscreen;
5022         gtk_widget_queue_resize (GTK_WIDGET (view));
5023
5024         g_object_notify (G_OBJECT (view), "fullscreen");
5025 }
5026
5027 gboolean
5028 ev_view_get_fullscreen (EvView *view)
5029 {
5030         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5031
5032         return view->fullscreen;
5033 }
5034
5035 void
5036 ev_view_set_presentation (EvView   *view,
5037                           gboolean  presentation)
5038 {
5039         g_return_if_fail (EV_IS_VIEW (view));
5040
5041         presentation = presentation != FALSE;
5042
5043         if (view->presentation == presentation)
5044                 return;
5045
5046         if (!presentation)
5047                 view->presentation_state = EV_PRESENTATION_NORMAL;
5048
5049         view->presentation = presentation;
5050         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5051
5052         if (presentation) {
5053                 view->sizing_mode_saved = view->sizing_mode;
5054                 view->scale_saved = view->scale;
5055                 ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
5056         } else {
5057                 ev_view_set_sizing_mode (view, view->sizing_mode_saved);
5058                 ev_view_set_zoom (view, view->scale_saved, FALSE);
5059         }
5060
5061         gtk_widget_queue_resize (GTK_WIDGET (view));
5062
5063         if (presentation)
5064                 ev_view_presentation_transition_start (view);
5065         else {
5066                 ev_view_presentation_transition_stop (view);
5067
5068                 if (view->animation) {
5069                         /* stop any running animation */
5070                         ev_view_transition_animation_cancel (view->animation, view);
5071                 }
5072         }
5073
5074         if (GTK_WIDGET_REALIZED (view)) {
5075                 if (view->presentation)
5076                         gdk_window_set_background (view->layout.bin_window,
5077                                                    &GTK_WIDGET (view)->style->black);
5078                 else
5079                         gdk_window_set_background (view->layout.bin_window,
5080                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
5081         }
5082
5083         g_object_notify (G_OBJECT (view), "presentation");
5084 }
5085
5086 gboolean
5087 ev_view_get_presentation (EvView *view)
5088 {
5089         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5090
5091         return view->presentation;
5092 }
5093
5094 static gboolean
5095 transition_next_page (EvView *view)
5096 {
5097         ev_view_next_page (view);
5098
5099         return FALSE;
5100 }
5101
5102 static void
5103 ev_view_presentation_transition_stop (EvView *view)
5104 {
5105         if (view->trans_timeout_id > 0)
5106                 g_source_remove (view->trans_timeout_id);
5107         view->trans_timeout_id = 0;
5108 }
5109
5110 static void
5111 ev_view_presentation_transition_start (EvView *view)
5112 {
5113         gdouble duration;
5114
5115         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
5116                 return;
5117
5118         ev_view_presentation_transition_stop (view);
5119
5120         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
5121                                                              view->current_page);
5122         if (duration > 0) {
5123                 view->trans_timeout_id =
5124                         g_timeout_add_seconds (duration,
5125                                                (GSourceFunc) transition_next_page,
5126                                                view);
5127         }
5128 }
5129
5130 void
5131 ev_view_set_sizing_mode (EvView       *view,
5132                          EvSizingMode  sizing_mode)
5133 {
5134         g_return_if_fail (EV_IS_VIEW (view));
5135
5136         if (view->sizing_mode == sizing_mode)
5137                 return;
5138
5139         view->sizing_mode = sizing_mode;
5140         gtk_widget_queue_resize (GTK_WIDGET (view));
5141
5142         g_object_notify (G_OBJECT (view), "sizing-mode");
5143 }
5144
5145 EvSizingMode
5146 ev_view_get_sizing_mode (EvView *view)
5147 {
5148         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
5149
5150         return view->sizing_mode;
5151 }
5152
5153 gboolean
5154 ev_view_can_zoom_in (EvView *view)
5155 {
5156         return view->scale * ZOOM_IN_FACTOR <= view->max_scale;
5157 }
5158
5159 gboolean
5160 ev_view_can_zoom_out (EvView *view)
5161 {
5162         return view->scale * ZOOM_OUT_FACTOR >= view->min_scale;
5163 }
5164
5165 void
5166 ev_view_zoom_in (EvView *view)
5167 {
5168         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5169
5170         if (view->presentation)
5171                 return;
5172
5173         view->pending_scroll = SCROLL_TO_CENTER;
5174         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
5175 }
5176
5177 void
5178 ev_view_zoom_out (EvView *view)
5179 {
5180         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5181
5182         if (view->presentation)
5183                 return;
5184
5185         view->pending_scroll = SCROLL_TO_CENTER;
5186         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
5187 }
5188
5189 void
5190 ev_view_rotate_right (EvView *view)
5191 {
5192         int rotation = view->rotation + 90;
5193
5194         if (rotation >= 360) {
5195                 rotation -= 360;
5196         }
5197
5198         ev_view_set_rotation (view, rotation);
5199 }
5200
5201 void
5202 ev_view_rotate_left (EvView *view)
5203 {
5204         int rotation = view->rotation - 90;
5205
5206         if (rotation < 0) {
5207                 rotation += 360;
5208         }
5209
5210         ev_view_set_rotation (view, rotation);
5211 }
5212
5213 void
5214 ev_view_set_rotation (EvView *view, int rotation)
5215 {
5216         view->rotation = rotation;
5217
5218         if (view->pixbuf_cache) {
5219                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5220                 gtk_widget_queue_resize (GTK_WIDGET (view));
5221         }
5222
5223         if (rotation != 0)
5224                 clear_selection (view);
5225
5226         g_object_notify (G_OBJECT (view), "rotation");
5227 }
5228
5229 int
5230 ev_view_get_rotation (EvView *view)
5231 {
5232         return view->rotation;
5233 }
5234
5235 static double
5236 zoom_for_size_fit_width (int doc_width,
5237                          int doc_height,
5238                          int target_width,
5239                          int target_height,
5240                          int vsb_width)
5241 {
5242         double scale;
5243
5244         scale = (double)target_width / doc_width;
5245
5246         if (doc_height * scale > target_height)
5247                 scale = (double) (target_width - vsb_width) / doc_width;
5248
5249         return scale;
5250 }
5251
5252 static double
5253 zoom_for_size_fit_height (int doc_width,
5254                           int doc_height,
5255                           int target_width,
5256                           int target_height,
5257                           int vsb_height)
5258 {
5259         double scale;
5260
5261         scale = (double)target_height / doc_height;
5262
5263         if (doc_width * scale > target_width)
5264                 scale = (double) (target_height - vsb_height) / doc_height;
5265
5266         return scale;
5267 }
5268
5269 static double
5270 zoom_for_size_best_fit (int doc_width,
5271                         int doc_height,
5272                         int target_width,
5273                         int target_height,
5274                         int vsb_width,
5275                         int hsb_width)
5276 {
5277         double w_scale;
5278         double h_scale;
5279
5280         w_scale = (double)target_width / doc_width;
5281         h_scale = (double)target_height / doc_height;
5282
5283         if (doc_height * w_scale > target_height)
5284                 w_scale = (double) (target_width - vsb_width) / doc_width;
5285         if (doc_width * h_scale > target_width)
5286                 h_scale = (double) (target_height - hsb_width) / doc_height;
5287
5288         return MIN (w_scale, h_scale);
5289 }
5290
5291
5292 static void
5293 ev_view_zoom_for_size_presentation (EvView *view,
5294                                     int     width,
5295                                     int     height)
5296 {
5297         int doc_width, doc_height;
5298         gdouble scale;
5299
5300         ev_page_cache_get_size (view->page_cache,
5301                                 view->current_page,
5302                                 view->rotation,
5303                                 1.0,
5304                                 &doc_width,
5305                                 &doc_height);
5306         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
5307         ev_view_set_zoom (view, scale, FALSE);
5308 }
5309
5310 static void
5311 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5312                            int     width,
5313                            int     height,
5314                            int     vsb_width,
5315                            int     hsb_height)
5316 {
5317         int doc_width, doc_height;
5318         GtkBorder border;
5319         gdouble scale;
5320
5321         ev_page_cache_get_max_width (view->page_cache,
5322                                      view->rotation,
5323                                      1.0,
5324                                      &doc_width);
5325         ev_page_cache_get_max_height (view->page_cache,
5326                                       view->rotation,
5327                                       1.0,
5328                                       &doc_height);
5329         compute_border (view, doc_width, doc_height, &border);
5330
5331         doc_width = doc_width * 2;
5332         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5333         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5334
5335         /* FIXME: We really need to calculate the overall height here, not the
5336          * page height.  We assume there's always a vertical scrollbar for
5337          * now.  We need to fix this. */
5338         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5339                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
5340         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5341                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
5342         else
5343                 g_assert_not_reached ();
5344
5345         ev_view_set_zoom (view, scale, FALSE);
5346 }
5347
5348 static void
5349 ev_view_zoom_for_size_continuous (EvView *view,
5350                                   int     width,
5351                                   int     height,
5352                                   int     vsb_width,
5353                                   int     hsb_height)
5354 {
5355         int doc_width, doc_height;
5356         GtkBorder border;
5357         gdouble scale;
5358
5359         ev_page_cache_get_max_width (view->page_cache,
5360                                      view->rotation,
5361                                      1.0,
5362                                      &doc_width);
5363         ev_page_cache_get_max_height (view->page_cache,
5364                                       view->rotation,
5365                                       1.0,
5366                                       &doc_height);
5367         compute_border (view, doc_width, doc_height, &border);
5368
5369         width -= (border.left + border.right + 2 * view->spacing);
5370         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5371
5372         /* FIXME: We really need to calculate the overall height here, not the
5373          * page height.  We assume there's always a vertical scrollbar for
5374          * now.  We need to fix this. */
5375         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5376                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
5377         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5378                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
5379         else
5380                 g_assert_not_reached ();
5381
5382         ev_view_set_zoom (view, scale, FALSE);
5383 }
5384
5385 static void
5386 ev_view_zoom_for_size_dual_page (EvView *view,
5387                                  int     width,
5388                                  int     height,
5389                                  int     vsb_width,
5390                                  int     hsb_height)
5391 {
5392         GtkBorder border;
5393         gint doc_width, doc_height;
5394         gdouble scale;
5395         gint other_page;
5396
5397         other_page = view->current_page ^ 1;
5398
5399         /* Find the largest of the two. */
5400         ev_page_cache_get_size (view->page_cache,
5401                                 view->current_page,
5402                                 view->rotation,
5403                                 1.0,
5404                                 &doc_width, &doc_height);
5405
5406         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
5407                 gint width_2, height_2;
5408                 ev_page_cache_get_size (view->page_cache,
5409                                         other_page,
5410                                         view->rotation,
5411                                         1.0,
5412                                         &width_2, &height_2);
5413                 if (width_2 > doc_width)
5414                         doc_width = width_2;
5415                 if (height_2 > doc_height)
5416                         doc_height = height_2;
5417         }
5418         compute_border (view, doc_width, doc_height, &border);
5419
5420         doc_width = doc_width * 2;
5421         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5422         height -= (border.top + border.bottom + 2 * view->spacing);
5423
5424         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5425                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
5426         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5427                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
5428         else
5429                 g_assert_not_reached ();
5430
5431         ev_view_set_zoom (view, scale, FALSE);
5432 }
5433
5434 static void
5435 ev_view_zoom_for_size_single_page (EvView *view,
5436                                    int     width,
5437                                    int     height,
5438                                    int     vsb_width,
5439                                    int     hsb_height)
5440 {
5441         int doc_width, doc_height;
5442         GtkBorder border;
5443         gdouble scale;
5444
5445         ev_page_cache_get_size (view->page_cache,
5446                                 view->current_page,
5447                                 view->rotation,
5448                                 1.0,
5449                                 &doc_width,
5450                                 &doc_height);
5451         /* Get an approximate border */
5452         compute_border (view, width, height, &border);
5453
5454         width -= (border.left + border.right + 2 * view->spacing);
5455         height -= (border.top + border.bottom + 2 * view->spacing);
5456
5457         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5458                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
5459         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5460                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
5461         else
5462                 g_assert_not_reached ();
5463
5464         ev_view_set_zoom (view, scale, FALSE);
5465 }
5466
5467 void
5468 ev_view_set_zoom_for_size (EvView *view,
5469                            int     width,
5470                            int     height,
5471                            int     vsb_width,
5472                            int     hsb_height)
5473 {
5474         g_return_if_fail (EV_IS_VIEW (view));
5475         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5476                           view->sizing_mode == EV_SIZING_BEST_FIT);
5477         g_return_if_fail (width >= 0);
5478         g_return_if_fail (height >= 0);
5479
5480         if (view->document == NULL)
5481                 return;
5482
5483         if (view->presentation)
5484                 ev_view_zoom_for_size_presentation (view, width, height);
5485         else if (view->continuous && view->dual_page)
5486                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
5487         else if (view->continuous)
5488                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
5489         else if (view->dual_page)
5490                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
5491         else
5492                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
5493 }
5494
5495 /*** Find ***/
5496 static gint
5497 ev_view_find_get_n_results (EvView *view, gint page)
5498 {
5499         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5500 }
5501
5502 static EvRectangle *
5503 ev_view_find_get_result (EvView *view, gint page, gint result)
5504 {
5505         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5506 }
5507
5508 static void
5509 jump_to_find_result (EvView *view)
5510 {
5511         gint n_results;
5512         gint page = view->current_page;
5513
5514         n_results = ev_view_find_get_n_results (view, page);
5515
5516         if (n_results > 0 && view->find_result < n_results) {
5517                 EvRectangle *rect;
5518                 GdkRectangle view_rect;
5519
5520                 rect = ev_view_find_get_result (view, page, view->find_result);
5521                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5522                 ensure_rectangle_is_visible (view, &view_rect);
5523                 view->jump_to_find_result = FALSE;
5524         }
5525 }
5526
5527 /**
5528  * jump_to_find_page
5529  * @view: #EvView instance
5530  * @direction: Direction to look
5531  * @shift: Shift from current page
5532  *
5533  * Jumps to the first page that has occurences of searched word.
5534  * Uses a direction where to look and a shift from current page.
5535  *
5536  */
5537 static void
5538 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5539 {
5540         int n_pages, i;
5541
5542         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5543
5544         for (i = 0; i < n_pages; i++) {
5545                 int page;
5546
5547                 if (direction == EV_VIEW_FIND_NEXT)
5548                         page = view->current_page + i;
5549                 else
5550                         page = view->current_page - i;
5551                 page += shift;
5552
5553                 if (page >= n_pages) {
5554                         page = page - n_pages;
5555                 } else if (page < 0)
5556                         page = page + n_pages;
5557
5558                 if (ev_view_find_get_n_results (view, page) > 0) {
5559                         ev_page_cache_set_current_page (view->page_cache, page);
5560                         break;
5561                 }
5562         }
5563 }
5564
5565 void
5566 ev_view_find_changed (EvView *view, GList **results, gint page)
5567 {
5568         view->find_pages = results;
5569
5570         if (view->jump_to_find_result == TRUE) {
5571                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5572                 jump_to_find_result (view);
5573         }
5574
5575         if (view->current_page == page)
5576                 gtk_widget_queue_draw (GTK_WIDGET (view));
5577 }
5578
5579 void
5580 ev_view_find_next (EvView *view)
5581 {
5582         gint n_results;
5583
5584         n_results = ev_view_find_get_n_results (view, view->current_page);
5585         view->find_result++;
5586
5587         if (view->find_result >= n_results) {
5588                 view->find_result = 0;
5589                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5590                 jump_to_find_result (view);
5591         } else {
5592                 jump_to_find_result (view);
5593                 gtk_widget_queue_draw (GTK_WIDGET (view));
5594         }
5595 }
5596
5597 void
5598 ev_view_find_previous (EvView *view)
5599 {
5600         view->find_result--;
5601
5602         if (view->find_result < 0) {
5603                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5604                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5605                 jump_to_find_result (view);
5606         } else {
5607                 jump_to_find_result (view);
5608                 gtk_widget_queue_draw (GTK_WIDGET (view));
5609         }
5610 }
5611
5612 void
5613 ev_view_find_search_changed (EvView *view)
5614 {
5615         /* search string has changed, focus on new search result */
5616         view->jump_to_find_result = TRUE;
5617         view->find_pages = NULL;
5618 }
5619
5620 void
5621 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5622 {
5623         view->highlight_find_results = value;
5624         gtk_widget_queue_draw (GTK_WIDGET (view));
5625 }
5626
5627 void
5628 ev_view_find_cancel (EvView *view)
5629 {
5630         view->find_pages = NULL;
5631 }
5632
5633 /*** Selections ***/
5634
5635 /* compute_new_selection_rect/text calculates the area currently selected by
5636  * view_rect.  each handles a different mode;
5637  */
5638 static GList *
5639 compute_new_selection_rect (EvView       *view,
5640                             GdkPoint     *start,
5641                             GdkPoint     *stop)
5642 {
5643         GdkRectangle view_rect;
5644         int n_pages, i;
5645         GList *list = NULL;
5646
5647         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5648
5649         view_rect.x = MIN (start->x, stop->x);
5650         view_rect.y = MIN (start->y, stop->y);
5651         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5652         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5653
5654         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5655
5656         for (i = 0; i < n_pages; i++) {
5657                 GdkRectangle page_area;
5658                 GtkBorder border;
5659
5660                 if (get_page_extents (view, i, &page_area, &border)) {
5661                         GdkRectangle overlap;
5662
5663                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5664                                 EvViewSelection *selection;
5665
5666                                 selection = g_new0 (EvViewSelection, 1);
5667                                 selection->page = i;
5668                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5669                                                        &(selection->rect));
5670
5671                                 list = g_list_append (list, selection);
5672                         }
5673                 }
5674         }
5675
5676         return list;
5677 }
5678
5679 static gboolean
5680 gdk_rectangle_point_in (GdkRectangle *rectangle,
5681                         GdkPoint     *point)
5682 {
5683         return rectangle->x <= point->x &&
5684                 rectangle->y <= point->y &&
5685                 point->x < rectangle->x + rectangle->width &&
5686                 point->y < rectangle->y + rectangle->height;
5687 }
5688
5689 static GList *
5690 compute_new_selection_text (EvView          *view,
5691                             EvSelectionStyle style,
5692                             GdkPoint        *start,
5693                             GdkPoint        *stop)
5694 {
5695         int n_pages, i, first, last;
5696         GList *list = NULL;
5697         EvViewSelection *selection;
5698         gint width, height;
5699         int start_page, end_page;
5700
5701         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5702
5703         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5704
5705         /* First figure out the range of pages the selection
5706          * affects. */
5707         first = n_pages;
5708         last = 0;
5709         if (view->continuous) {
5710                 start_page = 0;
5711                 end_page = n_pages;
5712         } else if (view->dual_page) {
5713                 start_page = view->start_page;
5714                 end_page = view->end_page + 1;
5715         } else {
5716                 start_page = view->current_page;
5717                 end_page = view->current_page + 1;
5718         }
5719
5720         for (i = start_page; i < end_page; i++) {
5721                 GdkRectangle page_area;
5722                 GtkBorder border;
5723
5724                 get_page_extents (view, i, &page_area, &border);
5725                 if (gdk_rectangle_point_in (&page_area, start) ||
5726                     gdk_rectangle_point_in (&page_area, stop)) {
5727                         if (first == n_pages)
5728                                 first = i;
5729                         last = i;
5730                 }
5731
5732         }
5733
5734         /* Now create a list of EvViewSelection's for the affected
5735          * pages.  This could be an empty list, a list of just one
5736          * page or a number of pages.*/
5737         for (i = first; i < last + 1; i++) {
5738                 GdkRectangle page_area;
5739                 GtkBorder border;
5740                 GdkPoint *point;
5741
5742                 ev_page_cache_get_size (view->page_cache, i,
5743                                         view->rotation,
5744                                         1.0, &width, &height);
5745
5746                 selection = g_new0 (EvViewSelection, 1);
5747                 selection->page = i;
5748                 selection->style = style;
5749                 selection->rect.x1 = selection->rect.y1 = 0;
5750                 selection->rect.x2 = width;
5751                 selection->rect.y2 = height;
5752
5753                 get_page_extents (view, i, &page_area, &border);
5754
5755                 if (gdk_rectangle_point_in (&page_area, start))
5756                         point = start;
5757                 else
5758                         point = stop;
5759
5760                 if (i == first)
5761                         view_point_to_doc_point (view, point, &page_area,
5762                                                  &selection->rect.x1,
5763                                                  &selection->rect.y1);
5764
5765                 /* If the selection is contained within just one page,
5766                  * make sure we don't write 'start' into both points
5767                  * in selection->rect. */
5768                 if (first == last)
5769                         point = stop;
5770
5771                 if (i == last)
5772                         view_point_to_doc_point (view, point, &page_area,
5773                                                  &selection->rect.x2,
5774                                                  &selection->rect.y2);
5775
5776                 list = g_list_append (list, selection);
5777         }
5778
5779         return list;
5780 }
5781
5782 /* This function takes the newly calculated list, and figures out which regions
5783  * have changed.  It then queues a redraw approporiately.
5784  */
5785 static void
5786 merge_selection_region (EvView *view,
5787                         GList  *new_list)
5788 {
5789         GList *old_list;
5790         GList *new_list_ptr, *old_list_ptr;
5791
5792         /* Update the selection */
5793         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5794         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5795         g_list_free (view->selection_info.selections);
5796         view->selection_info.selections = new_list;
5797         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5798         g_object_notify (G_OBJECT (view), "has-selection");
5799
5800         new_list_ptr = new_list;
5801         old_list_ptr = old_list;
5802
5803         while (new_list_ptr || old_list_ptr) {
5804                 EvViewSelection *old_sel, *new_sel;
5805                 int cur_page;
5806                 GdkRegion *region = NULL;
5807
5808                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5809                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5810
5811                 /* Assume that the lists are in order, and we run through them
5812                  * comparing them, one page at a time.  We come out with the
5813                  * first page we see. */
5814                 if (new_sel && old_sel) {
5815                         if (new_sel->page < old_sel->page) {
5816                                 new_list_ptr = new_list_ptr->next;
5817                                 old_sel = NULL;
5818                         } else if (new_sel->page > old_sel->page) {
5819                                 old_list_ptr = old_list_ptr->next;
5820                                 new_sel = NULL;
5821                         } else {
5822                                 new_list_ptr = new_list_ptr->next;
5823                                 old_list_ptr = old_list_ptr->next;
5824                         }
5825                 } else if (new_sel) {
5826                         new_list_ptr = new_list_ptr->next;
5827                 } else if (old_sel) {
5828                         old_list_ptr = old_list_ptr->next;
5829                 }
5830
5831                 g_assert (new_sel || old_sel);
5832
5833                 /* is the page we're looking at on the screen?*/
5834                 cur_page = new_sel ? new_sel->page : old_sel->page;
5835                 if (cur_page < view->start_page || cur_page > view->end_page)
5836                         continue;
5837
5838                 /* seed the cache with a new page.  We are going to need the new
5839                  * region too. */
5840                 if (new_sel) {
5841                         GdkRegion *tmp_region = NULL;
5842
5843                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5844                                                                cur_page,
5845                                                                view->scale,
5846                                                                &tmp_region);
5847
5848                         if (tmp_region) {
5849                                 new_sel->covered_region = gdk_region_copy (tmp_region);
5850                         }
5851                 }
5852
5853                 /* Now we figure out what needs redrawing */
5854                 if (old_sel && new_sel) {
5855                         if (old_sel->covered_region && new_sel->covered_region) {
5856                                 /* We only want to redraw the areas that have
5857                                  * changed, so we xor the old and new regions
5858                                  * and redraw if it's different */
5859                                 region = gdk_region_copy (old_sel->covered_region);
5860                                 gdk_region_xor (region, new_sel->covered_region);
5861                                 if (gdk_region_empty (region)) {
5862                                         gdk_region_destroy (region);
5863                                         region = NULL;
5864                                 }
5865                         } else if (old_sel->covered_region) {
5866                                 region = gdk_region_copy (old_sel->covered_region);
5867                         } else if (new_sel->covered_region) {
5868                                 region = gdk_region_copy (new_sel->covered_region);
5869                         }
5870                 } else if (old_sel && !new_sel) {
5871                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
5872                                 region = gdk_region_copy (old_sel->covered_region);
5873                         }
5874                 } else if (!old_sel && new_sel) {
5875                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
5876                                 region = gdk_region_copy (new_sel->covered_region);
5877                         }
5878                 } else {
5879                         g_assert_not_reached ();
5880                 }
5881
5882                 /* Redraw the damaged region! */
5883                 if (region) {
5884                         GdkRectangle page_area;
5885                         GtkBorder border;
5886
5887                         /* I don't know why but the region is smaller
5888                          * than expected. This hack fixes it, I guess
5889                          * 10 pixels more won't hurt
5890                          */
5891                         gdk_region_shrink (region, -5, -5);
5892
5893                         get_page_extents (view, cur_page, &page_area, &border);
5894                         gdk_region_offset (region,
5895                                            page_area.x + border.left - view->scroll_x,
5896                                            page_area.y + border.top - view->scroll_y);
5897                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
5898                         gdk_region_destroy (region);
5899                 }
5900         }
5901
5902         /* Free the old list, now that we're done with it. */
5903         g_list_foreach (old_list, (GFunc) selection_free, NULL);
5904         g_list_free (old_list);
5905 }
5906
5907 static void
5908 compute_selections (EvView          *view,
5909                     EvSelectionStyle style,
5910                     GdkPoint        *start,
5911                     GdkPoint        *stop)
5912 {
5913         GList *list;
5914
5915         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
5916                 list = compute_new_selection_rect (view, start, stop);
5917         else
5918                 list = compute_new_selection_text (view, style, start, stop);
5919         merge_selection_region (view, list);
5920 }
5921
5922 /* Free's the selection.  It's up to the caller to queue redraws if needed.
5923  */
5924 static void
5925 selection_free (EvViewSelection *selection)
5926 {
5927         if (selection->covered_region)
5928                 gdk_region_destroy (selection->covered_region);
5929         g_free (selection);
5930 }
5931
5932 static void
5933 clear_selection (EvView *view)
5934 {
5935         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5936         g_list_free (view->selection_info.selections);
5937         view->selection_info.selections = NULL;
5938         view->selection_info.in_selection = FALSE;
5939         if (view->pixbuf_cache)
5940                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
5941         g_object_notify (G_OBJECT (view), "has-selection");
5942 }
5943
5944 void
5945 ev_view_select_all (EvView *view)
5946 {
5947         GList *selections = NULL;
5948         int n_pages, i;
5949
5950         /* Disable selection on rotated pages for the 0.4.0 series */
5951         if (view->rotation != 0)
5952                 return;
5953
5954         clear_selection (view);
5955
5956         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5957         for (i = 0; i < n_pages; i++) {
5958                 int width, height;
5959                 EvViewSelection *selection;
5960
5961                 ev_page_cache_get_size (view->page_cache,
5962                                         i,
5963                                         view->rotation,
5964                                         1.0, &width, &height);
5965
5966                 selection = g_new0 (EvViewSelection, 1);
5967                 selection->page = i;
5968                 selection->style = EV_SELECTION_STYLE_GLYPH;
5969                 selection->rect.x1 = selection->rect.y1 = 0;
5970                 selection->rect.x2 = width;
5971                 selection->rect.y2 = height;
5972
5973                 selections = g_list_append (selections, selection);
5974         }
5975
5976         merge_selection_region (view, selections);
5977         gtk_widget_queue_draw (GTK_WIDGET (view));
5978 }
5979
5980 gboolean
5981 ev_view_get_has_selection (EvView *view)
5982 {
5983         return view->selection_info.selections != NULL;
5984 }
5985
5986 static char *
5987 get_selected_text (EvView *view)
5988 {
5989         GString *text;
5990         GList *l;
5991         gchar *normalized_text;
5992         EvRenderContext *rc;
5993
5994         text = g_string_new (NULL);
5995         rc = ev_render_context_new (NULL, view->rotation, view->scale);
5996
5997         ev_document_doc_mutex_lock ();
5998
5999         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6000                 EvViewSelection *selection = (EvViewSelection *)l->data;
6001                 EvPage *page;
6002                 gchar *tmp;
6003
6004                 page = ev_document_get_page (view->document, selection->page);
6005                 ev_render_context_set_page (rc, page);
6006                 g_object_unref (page);
6007
6008                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6009                                                       rc, selection->style,
6010                                                       &(selection->rect));
6011
6012                 g_string_append (text, tmp);
6013                 g_free (tmp);
6014         }
6015
6016         g_object_unref (rc);
6017
6018         ev_document_doc_mutex_unlock ();
6019
6020         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6021         g_string_free (text, TRUE);
6022         return normalized_text;
6023 }
6024
6025 static void
6026 ev_view_clipboard_copy (EvView      *view,
6027                         const gchar *text)
6028 {
6029         GtkClipboard *clipboard;
6030
6031         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6032                                               GDK_SELECTION_CLIPBOARD);
6033         gtk_clipboard_set_text (clipboard, text, -1);
6034 }
6035
6036 void
6037 ev_view_copy (EvView *ev_view)
6038 {
6039         char *text;
6040
6041         if (!EV_IS_SELECTION (ev_view->document))
6042                 return;
6043
6044         text = get_selected_text (ev_view);
6045         ev_view_clipboard_copy (ev_view, text);
6046         g_free (text);
6047 }
6048
6049 static void
6050 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6051                         GtkSelectionData *selection_data,
6052                         guint             info,
6053                         gpointer          data)
6054 {
6055         EvView *ev_view = EV_VIEW (data);
6056
6057         if (ev_view->link_selected) {
6058                 gtk_selection_data_set_text (selection_data,
6059                                              ev_link_action_get_uri (ev_view->link_selected),
6060                                              -1);
6061         } else if (EV_IS_SELECTION (ev_view->document) &&
6062                    ev_view->selection_info.selections) {
6063                 gchar *text;
6064
6065                 text = get_selected_text (ev_view);
6066                 if (text) {
6067                         gtk_selection_data_set_text (selection_data, text, -1);
6068                         g_free (text);
6069                 }
6070         }
6071 }
6072
6073 static void
6074 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6075                           gpointer      data)
6076 {
6077         EvView *view = EV_VIEW (data);
6078
6079         clear_selection (view);
6080         clear_link_selected (view);
6081 }
6082
6083 static void
6084 ev_view_update_primary_selection (EvView *ev_view)
6085 {
6086         GtkClipboard *clipboard;
6087
6088         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6089                                               GDK_SELECTION_PRIMARY);
6090
6091         if (ev_view->selection_info.selections || ev_view->link_selected) {
6092                 GtkTargetList *target_list;
6093                 GtkTargetEntry *targets;
6094                 int n_targets;
6095
6096                 target_list = gtk_target_list_new (NULL, 0);
6097                 gtk_target_list_add_text_targets (target_list, 0);
6098                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6099                 gtk_target_list_unref (target_list);
6100
6101                 if (!gtk_clipboard_set_with_owner (clipboard,
6102                                                    targets, n_targets,
6103                                                    ev_view_primary_get_cb,
6104                                                    ev_view_primary_clear_cb,
6105                                                    G_OBJECT (ev_view)))
6106                         ev_view_primary_clear_cb (clipboard, ev_view);
6107
6108                 gtk_target_table_free (targets, n_targets);
6109         } else {
6110                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6111                         gtk_clipboard_clear (clipboard);
6112         }
6113 }
6114
6115 static void
6116 clear_link_selected (EvView *view)
6117 {
6118         if (view->link_selected) {
6119                 g_object_unref (view->link_selected);
6120                 view->link_selected = NULL;
6121         }
6122 }
6123
6124 void
6125 ev_view_copy_link_address (EvView       *view,
6126                            EvLinkAction *action)
6127 {
6128         clear_link_selected (view);
6129
6130         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6131
6132         view->link_selected = g_object_ref (action);
6133         ev_view_update_primary_selection (view);
6134 }
6135
6136 /*** Cursor operations ***/
6137
6138 static GdkCursor *
6139 ev_view_create_invisible_cursor(void)
6140 {
6141        GdkBitmap *empty;
6142        GdkColor black = { 0, 0, 0, 0 };
6143        static char bits[] = { 0x00 };
6144
6145        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
6146
6147        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
6148 }
6149
6150 static void
6151 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6152 {
6153         GdkCursor *cursor = NULL;
6154         GdkDisplay *display;
6155         GtkWidget *widget;
6156
6157         if (view->cursor == new_cursor) {
6158                 return;
6159         }
6160
6161         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6162         display = gtk_widget_get_display (widget);
6163         view->cursor = new_cursor;
6164
6165         switch (new_cursor) {
6166                 case EV_VIEW_CURSOR_NORMAL:
6167                         gdk_window_set_cursor (view->layout.bin_window, NULL);
6168                         break;
6169                 case EV_VIEW_CURSOR_IBEAM:
6170                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
6171                         break;
6172                 case EV_VIEW_CURSOR_LINK:
6173                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
6174                         break;
6175                 case EV_VIEW_CURSOR_WAIT:
6176                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
6177                         break;
6178                 case EV_VIEW_CURSOR_HIDDEN:
6179                         cursor = ev_view_create_invisible_cursor ();
6180                         break;
6181                 case EV_VIEW_CURSOR_DRAG:
6182                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
6183                         break;
6184                 case EV_VIEW_CURSOR_AUTOSCROLL:
6185                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
6186                         break;
6187         }
6188
6189         if (cursor) {
6190                 gdk_window_set_cursor (view->layout.bin_window, cursor);
6191                 gdk_cursor_unref (cursor);
6192                 gdk_flush();
6193         }
6194 }
6195
6196 void
6197 ev_view_hide_cursor (EvView *view)
6198 {
6199        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6200 }
6201
6202 void
6203 ev_view_show_cursor (EvView *view)
6204 {
6205        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6206 }
6207
6208 static void
6209 ev_view_reset_presentation_state (EvView *view)
6210 {
6211         if (!view->presentation ||
6212             view->presentation_state == EV_PRESENTATION_NORMAL)
6213                 return;
6214
6215         view->presentation_state = EV_PRESENTATION_NORMAL;
6216         gdk_window_set_background (view->layout.bin_window,
6217                                    &GTK_WIDGET (view)->style->black);
6218         gtk_widget_queue_draw (GTK_WIDGET (view));
6219 }
6220
6221 gboolean
6222 ev_view_next_page (EvView *view)
6223 {
6224         int page, n_pages;
6225
6226         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6227
6228         if (!view->page_cache)
6229                 return FALSE;
6230
6231         if (view->presentation &&
6232             (view->presentation_state == EV_PRESENTATION_BLACK ||
6233              view->presentation_state == EV_PRESENTATION_WHITE)) {
6234                 ev_view_reset_presentation_state (view);
6235                 return FALSE;
6236         }
6237
6238         if (view->animation) {
6239                 ev_view_transition_animation_cancel (view->animation, view);
6240         }
6241
6242         ev_view_presentation_transition_stop (view);
6243         ev_view_reset_presentation_state (view);
6244
6245         page = ev_page_cache_get_current_page (view->page_cache);
6246         n_pages = ev_page_cache_get_n_pages (view->page_cache);
6247
6248         if (view->dual_page && !view->presentation)
6249                 page = page + 2;
6250         else
6251                 page = page + 1;
6252
6253         if (page < n_pages) {
6254                 ev_page_cache_set_current_page (view->page_cache, page);
6255                 return TRUE;
6256         } else if (view->presentation && page == n_pages) {
6257                 view->presentation_state = EV_PRESENTATION_END;
6258                 gtk_widget_queue_draw (GTK_WIDGET (view));
6259                 return TRUE;
6260         } else if (view->dual_page && page == n_pages) {
6261                 ev_page_cache_set_current_page (view->page_cache, page - 1);
6262                 return TRUE;
6263         } else {
6264                 return FALSE;
6265         }
6266 }
6267
6268 gboolean
6269 ev_view_previous_page (EvView *view)
6270 {
6271         int page;
6272
6273         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6274
6275         if (!view->page_cache)
6276                 return FALSE;
6277
6278         if (view->presentation &&
6279             view->presentation_state == EV_PRESENTATION_END) {
6280                 ev_view_reset_presentation_state (view);
6281                 return TRUE;
6282         }
6283
6284         if (view->presentation &&
6285             (view->presentation_state == EV_PRESENTATION_BLACK ||
6286              view->presentation_state == EV_PRESENTATION_WHITE)) {
6287                 ev_view_reset_presentation_state (view);
6288                 return FALSE;
6289         }
6290
6291         if (view->animation) {
6292                 ev_view_transition_animation_cancel (view->animation, view);
6293         }
6294
6295         ev_view_reset_presentation_state (view);
6296
6297         page = ev_page_cache_get_current_page (view->page_cache);
6298
6299         if (view->dual_page && !view->presentation)
6300                 page = page - 2;
6301         else
6302                 page = page - 1;
6303
6304         if (page >= 0) {
6305                 ev_page_cache_set_current_page (view->page_cache, page);
6306                 return TRUE;
6307         } else if (ev_view_get_dual_page (view) && page == -1) {
6308                 ev_page_cache_set_current_page (view->page_cache, 0);
6309                 return TRUE;
6310         } else {
6311                 return FALSE;
6312         }
6313 }
6314