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-document-forms.h"
  32 #include "ev-document-images.h"
  33 #include "ev-document-links.h"
  34 #include "ev-document-misc.h"
  35 #include "ev-document-transition.h"
  36 #include "ev-page-cache.h"
  37 #include "ev-pixbuf-cache.h"
  38 #include "ev-transition-animation.h"
  39 #include "ev-view-marshal.h"
  40 #include "ev-document-annotations.h"
  41 #include "ev-annotation-window.h"
  42 #include "ev-view.h"
  43 #include "ev-view-accessible.h"
  44 #include "ev-view-private.h"
  45 #include "ev-view-type-builtins.h"
  46
  47 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  48 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  49 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  50
  51 enum {
  52         PROP_0,
  53         PROP_CONTINUOUS,
  54         PROP_DUAL_PAGE,
  55         PROP_FULLSCREEN,
  56         PROP_PRESENTATION,
  57         PROP_SIZING_MODE,
  58         PROP_ZOOM,
  59         PROP_ROTATION,
  60         PROP_HAS_SELECTION,
  61 };
  62
  63 enum {
  64         SIGNAL_BINDING_ACTIVATED,
  65         SIGNAL_ZOOM_INVALID,
  66         SIGNAL_HANDLE_LINK,
  67         SIGNAL_EXTERNAL_LINK,
  68         SIGNAL_POPUP_MENU,
  69         N_SIGNALS,
  70 };
  71
  72 enum {
  73         TARGET_DND_URI,
  74         TARGET_DND_TEXT,
  75         TARGET_DND_IMAGE
  76 };
  77
  78 static guint signals[N_SIGNALS];
  79
  80 typedef enum {
  81         EV_VIEW_FIND_NEXT,
  82         EV_VIEW_FIND_PREV
  83 } EvViewFindDirection;
  84
  85 #define ZOOM_IN_FACTOR  1.2
  86 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  87
  88 #define MIN_SCALE 0.05409
  89 #define MAX_SCALE 4.0
  90
  91 #define SCROLL_TIME 150
  92
  93 /*** Scrolling ***/
  94 static void       scroll_to_current_page                     (EvView *view,
  95                                                               GtkOrientation orientation);
  96 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  97                                                               GtkAdjustment      *hadjustment,
  98                                                               GtkAdjustment      *vadjustment);
  99 static void       view_update_range_and_current_page         (EvView             *view);
 100 static void       set_scroll_adjustment                      (EvView             *view,
 101                                                               GtkOrientation      orientation,
 102                                                               GtkAdjustment      *adjustment);
 103 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 104                                                               guint               keyval,
 105                                                               GdkModifierType modifiers,
 106                                                               GtkScrollType       scroll,
 107                                                               gboolean            horizontal);
 108 static void       ensure_rectangle_is_visible                (EvView             *view,
 109                                                               GdkRectangle       *rect);
 110
 111 /*** Geometry computations ***/
 112 static void       compute_border                             (EvView             *view,
 113                                                               int                 width,
 114                                                               int                 height,
 115                                                               GtkBorder          *border);
 116 static void       get_page_y_offset                          (EvView *view,
 117                                                               int page,
 118                                                               double zoom,
 119                                                               int *y_offset);
 120 static gboolean   get_page_extents                           (EvView             *view,
 121                                                               gint                page,
 122                                                               GdkRectangle       *page_area,
 123                                                               GtkBorder          *border);
 124 static void       view_rect_to_doc_rect                      (EvView             *view,
 125                                                               GdkRectangle       *view_rect,
 126                                                               GdkRectangle       *page_area,
 127                                                               EvRectangle        *doc_rect);
 128 static void       doc_rect_to_view_rect                      (EvView             *view,
 129                                                               int                 page,
 130                                                               EvRectangle        *doc_rect,
 131                                                               GdkRectangle       *view_rect);
 132 static void       find_page_at_location                      (EvView             *view,
 133                                                               gdouble             x,
 134                                                               gdouble             y,
 135                                                               gint               *page,
 136                                                               gint               *x_offset,
 137                                                               gint               *y_offset);
 138 static gboolean  doc_point_to_view_point                     (EvView             *view,
 139                                                               int                 page,
 140                                                               EvPoint            *doc_point,
 141                                                               GdkPoint           *view_point);
 142 /*** Hyperrefs ***/
 143 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 144                                                               gdouble             x,
 145                                                               gdouble             y);
 146 static char*      tip_from_link                              (EvView             *view,
 147                                                               EvLink             *link);
 148 /*** Forms ***/
 149 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 150                                                                gdouble            x,
 151                                                                gdouble            y);
 152
 153 /*** Annotations ***/
 154 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 155                                                               gdouble             x,
 156                                                               gdouble             y);
 157 static void          show_annotation_windows                 (EvView             *view,
 158                                                               gint                page);
 159 static void          hide_annotation_windows                 (EvView             *view,
 160                                                               gint                page);
 161 /*** GtkWidget implementation ***/
 162 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 163                                                               GtkRequisition     *requisition);
 164 static void       ev_view_size_request_continuous            (EvView             *view,
 165                                                               GtkRequisition     *requisition);
 166 static void       ev_view_size_request_dual_page             (EvView             *view,
 167                                                               GtkRequisition     *requisition);
 168 static void       ev_view_size_request_single_page           (EvView             *view,
 169                                                               GtkRequisition     *requisition);
 170 static void       ev_view_size_request                       (GtkWidget          *widget,
 171                                                               GtkRequisition     *requisition);
 172 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 173                                                               GtkAllocation      *allocation);
 174 static void       ev_view_realize                            (GtkWidget          *widget);
 175 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 176                                                               GdkEventScroll     *event);
 177 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 178                                                               GdkEventExpose     *event);
 179 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 180 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 181                                                               GdkEventButton     *event);
 182 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 183                                                               GdkEventMotion     *event);
 184 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 185                                                               GdkEventButton     *event);
 186 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 187                                                               GdkEventCrossing   *event);
 188 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 189                                                               GdkEventCrossing   *event);
 190 static void       ev_view_style_set                          (GtkWidget          *widget,
 191                                                               GtkStyle           *old_style);
 192 static void       ev_view_remove_all                         (EvView             *view);
 193
 194 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 195
 196 /*** Drawing ***/
 197 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 198 static void       draw_rubberband                            (GtkWidget          *widget,
 199                                                               GdkWindow          *window,
 200                                                               const GdkRectangle *rect,
 201                                                               guchar              alpha);
 202 static void       highlight_find_results                     (EvView             *view,
 203                                                               int                 page);
 204 static void       draw_one_page                              (EvView             *view,
 205                                                               gint                page,
 206                                                               cairo_t            *cr,
 207                                                               GdkRectangle       *page_area,
 208                                                               GtkBorder          *border,
 209                                                               GdkRectangle       *expose_area,
 210                                                               gboolean           *page_ready);
 211 static void       draw_loading_text                          (EvView             *view,
 212                                                               GdkRectangle       *page_area,
 213                                                               GdkRectangle       *expose_area);
 214 static void       ev_view_reload_page                        (EvView             *view,
 215                                                               gint                page,
 216                                                               GdkRegion          *region);
 217
 218 /*** Callbacks ***/
 219 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 220                                                               GdkRegion          *region,
 221                                                               EvView             *view);
 222 static void       page_changed_cb                            (EvPageCache        *page_cache,
 223                                                               int                 new_page,
 224                                                               EvView             *view);
 225 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 226                                                               EvView             *view);
 227
 228 /*** GObject ***/
 229 static void       ev_view_finalize                           (GObject            *object);
 230 static void       ev_view_destroy                            (GtkObject          *object);
 231 static void       ev_view_set_property                       (GObject            *object,
 232                                                               guint               prop_id,
 233                                                               const GValue       *value,
 234                                                               GParamSpec         *pspec);
 235 static void       ev_view_get_property                       (GObject            *object,
 236                                                               guint               prop_id,
 237                                                               GValue             *value,
 238                                                               GParamSpec         *pspec);
 239 static void       ev_view_class_init                         (EvViewClass        *class);
 240 static void       ev_view_init                               (EvView             *view);
 241
 242 /*** Zoom and sizing ***/
 243 static double   zoom_for_size_fit_width                      (int doc_width,
 244                                                               int doc_height,
 245                                                               int target_width,
 246                                                               int target_height,
 247                                                               int vsb_width);
 248 static double   zoom_for_size_fit_height                     (int doc_width,
 249                                                               int doc_height,
 250                                                               int target_width,
 251                                                               int target_height,
 252                                                               int vsb_height);
 253 static double   zoom_for_size_best_fit                       (int doc_width,
 254                                                               int doc_height,
 255                                                               int target_width,
 256                                                               int target_height,
 257                                                               int vsb_width,
 258                                                               int hsb_width);
 259 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 260                                                               int     width,
 261                                                               int     height);
 262 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 263                                                                 int     width,
 264                                                                 int     height,
 265                                                                 int     vsb_width,
 266                                                                 int     hsb_height);
 267 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 268                                                                 int     width,
 269                                                                 int     height,
 270                                                                 int     vsb_width,
 271                                                                 int     hsb_height);
 272 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 273                                                                 int     width,
 274                                                                 int     height,
 275                                                                 int     vsb_width,
 276                                                                 int     hsb_height);
 277 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 278                                                                 int     width,
 279                                                                 int     height,
 280                                                                 int     vsb_width,
 281                                                                 int     hsb_height);
 282 /*** Cursors ***/
 283 static GdkCursor* ev_view_create_invisible_cursor            (void);
 284 static void       ev_view_set_cursor                         (EvView             *view,
 285                                                               EvViewCursor        new_cursor);
 286 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 287                                                               gint x,
 288                                                               gint y);
 289
 290 /*** Find ***/
 291 static gint         ev_view_find_get_n_results               (EvView             *view,
 292                                                               gint                page);
 293 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 294                                                               gint                page,
 295                                                               gint                result);
 296 static void       jump_to_find_result                        (EvView             *view);
 297 static void       jump_to_find_page                          (EvView             *view,
 298                                                               EvViewFindDirection direction,
 299                                                               gint                shift);
 300
 301 /*** Selection ***/
 302 static void       compute_selections                         (EvView             *view,
 303                                                               EvSelectionStyle    style,
 304                                                               GdkPoint           *start,
 305                                                               GdkPoint           *stop);
 306 static void       clear_selection                            (EvView             *view);
 307 static void       clear_link_selected                        (EvView             *view);
 308 static void       selection_free                             (EvViewSelection    *selection);
 309 static char*      get_selected_text                          (EvView             *ev_view);
 310 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 311                                                               GtkSelectionData   *selection_data,
 312                                                               guint               info,
 313                                                               gpointer            data);
 314 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 315                                                               gpointer            data);
 316 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 317
 318 /*** Presentation ***/
 319 static void       ev_view_presentation_transition_start      (EvView             *ev_view);
 320 static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
 321
 322
 323 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 324
 325 static void
 326 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 327 {
 328         GdkPoint view_point;
 329
 330         if (view->document == NULL) {
 331                 return;
 332         }
 333
 334         doc_point_to_view_point (view, view->current_page, &view->pending_point, &view_point);
 335
 336         if (orientation == GTK_ORIENTATION_VERTICAL) {
 337                 view->pending_point.y = 0;
 338         } else {
 339                 view->pending_point.x = 0;
 340         }
 341
 342         if (orientation == GTK_ORIENTATION_VERTICAL) {
 343                 if (view->continuous) {
 344                         gtk_adjustment_clamp_page (view->vadjustment,
 345                                                    view_point.y - view->spacing / 2,
 346                                                    view_point.y + view->vadjustment->page_size);
 347                 } else {
 348                         gtk_adjustment_set_value (view->vadjustment,
 349                                                   CLAMP (view_point.y,
 350                                                   view->vadjustment->lower,
 351                                                   view->vadjustment->upper -
 352                                                   view->vadjustment->page_size));
 353                 }
 354         } else {
 355                 if (view->dual_page) {
 356                         gtk_adjustment_clamp_page (view->hadjustment,
 357                                                    view_point.x,
 358                                                    view_point.x + view->hadjustment->page_size);
 359                 } else {
 360                         gtk_adjustment_set_value (view->hadjustment,
 361                                                   CLAMP (view_point.x,
 362                                                   view->hadjustment->lower,
 363                                                   view->hadjustment->upper -
 364                                                   view->hadjustment->page_size));
 365                 }
 366         }
 367 }
 368
 369 static void
 370 view_set_adjustment_values (EvView         *view,
 371                             GtkOrientation  orientation)
 372 {
 373         GtkWidget *widget = GTK_WIDGET (view);
 374         GtkAdjustment *adjustment;
 375         int requisition;
 376         int allocation;
 377
 378         double factor;
 379         gint new_value;
 380
 381         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 382                 requisition = widget->requisition.width;
 383                 allocation = widget->allocation.width;
 384                 adjustment = view->hadjustment;
 385         } else {
 386                 requisition = widget->requisition.height;
 387                 allocation = widget->allocation.height;
 388                 adjustment = view->vadjustment;
 389         }
 390
 391         if (!adjustment)
 392                 return;
 393
 394         factor = 1.0;
 395         switch (view->pending_scroll) {
 396                 case SCROLL_TO_KEEP_POSITION:
 397                 case SCROLL_TO_FIND_LOCATION:
 398                         factor = (adjustment->value) / adjustment->upper;
 399                         break;
 400                 case SCROLL_TO_PAGE_POSITION:
 401                         break;
 402                 case SCROLL_TO_CENTER:
 403                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 404                         break;
 405         }
 406
 407         adjustment->page_size = allocation;
 408         adjustment->step_increment = allocation * 0.1;
 409         adjustment->page_increment = allocation * 0.9;
 410         adjustment->lower = 0;
 411         adjustment->upper = MAX (allocation, requisition);
 412
 413         /*
 414          * We add 0.5 to the values before to average out our rounding errors.
 415          */
 416         switch (view->pending_scroll) {
 417                 case SCROLL_TO_KEEP_POSITION:
 418                 case SCROLL_TO_FIND_LOCATION:
 419                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 420                         gtk_adjustment_set_value (adjustment, (int)new_value);
 421                         break;
 422                 case SCROLL_TO_PAGE_POSITION:
 423                         scroll_to_current_page (view, orientation);
 424                         break;
 425                 case SCROLL_TO_CENTER:
 426                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 427                                            0, adjustment->upper - adjustment->page_size);
 428                         gtk_adjustment_set_value (adjustment, (int)new_value);
 429                         break;
 430         }
 431
 432         gtk_adjustment_changed (adjustment);
 433 }
 434
 435 static void
 436 view_update_range_and_current_page (EvView *view)
 437 {
 438         gint current_page;
 439         gint best_current_page = -1;
 440         gint start = view->start_page;
 441         gint end = view->end_page;
 442
 443         /* Presentation trumps all other modes */
 444         if (view->presentation) {
 445                 view->start_page = view->current_page;
 446                 view->end_page = view->current_page;
 447         } else if (view->continuous) {
 448                 GdkRectangle current_area, unused, page_area;
 449                 GtkBorder border;
 450                 gboolean found = FALSE;
 451                 gint area_max = -1, area;
 452                 int i;
 453
 454                 if (!(view->vadjustment && view->hadjustment))
 455                         return;
 456
 457                 current_area.x = view->hadjustment->value;
 458                 current_area.width = view->hadjustment->upper;
 459                 current_area.y = view->vadjustment->value;
 460                 current_area.height = view->vadjustment->page_size;
 461
 462                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 463
 464                         get_page_extents (view, i, &page_area, &border);
 465
 466                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 467                                 area = unused.width * unused.height;
 468
 469                                 if (!found) {
 470                                         area_max = area;
 471                                         view->start_page = i;
 472                                         found = TRUE;
 473                                         best_current_page = i;
 474                                 }
 475                                 if (area > area_max) {
 476                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 477                                         area_max = area;
 478                                 }
 479
 480                                 view->end_page = i;
 481                         } else if (found && view->current_page <= view->end_page) {
 482                                 break;
 483                         }
 484                 }
 485
 486         } else if (view->dual_page) {
 487                 if (view->current_page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) {
 488                         view->start_page = view->current_page;
 489                         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 490                                 view->end_page = view->start_page + 1;
 491                         else
 492                                 view->end_page = view->start_page;
 493                 } else {
 494                         if (view->current_page < 1)
 495                                 view->start_page = view->current_page;
 496                         else
 497                                 view->start_page = view->current_page - 1;
 498                         view->end_page = view->current_page;
 499                 }
 500         } else {
 501                 view->start_page = view->current_page;
 502                 view->end_page = view->current_page;
 503         }
 504
 505         best_current_page = MAX (best_current_page, view->start_page);
 506         current_page = ev_page_cache_get_current_page (view->page_cache);
 507
 508         if ((current_page != best_current_page) && (view->pending_scroll == SCROLL_TO_KEEP_POSITION)) {
 509                 view->current_page = best_current_page;
 510                 ev_page_cache_set_current_page (view->page_cache, best_current_page);
 511         }
 512
 513         if (start != view->start_page || end != view->end_page) {
 514                 gint i;
 515
 516                 for (i = start; i < view->start_page; i++) {
 517                         hide_annotation_windows (view, i);
 518                 }
 519
 520                 for (i = end; i > view->end_page; i--) {
 521                         hide_annotation_windows (view, i);
 522                 }
 523         }
 524
 525         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 526                                         view->start_page,
 527                                         view->end_page,
 528                                         view->rotation,
 529                                         view->scale,
 530                                         view->selection_info.selections);
 531 }
 532
 533 static void
 534 set_scroll_adjustment (EvView *view,
 535                        GtkOrientation  orientation,
 536                        GtkAdjustment  *adjustment)
 537 {
 538         GtkAdjustment **to_set;
 539
 540         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 541                 to_set = &view->hadjustment;
 542         else
 543                 to_set = &view->vadjustment;
 544
 545         if (*to_set != adjustment) {
 546                 if (*to_set) {
 547                         g_signal_handlers_disconnect_by_func (*to_set,
 548                                                               (gpointer) on_adjustment_value_changed,
 549                                                               view);
 550                         g_object_unref (*to_set);
 551                 }
 552
 553                 *to_set = adjustment;
 554                 view_set_adjustment_values (view, orientation);
 555
 556                 if (*to_set) {
 557                         g_object_ref (*to_set);
 558                         g_signal_connect (*to_set, "value_changed",
 559                                           G_CALLBACK (on_adjustment_value_changed), view);
 560                 }
 561         }
 562 }
 563
 564 static void
 565 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 566                                 GtkAdjustment  *hadjustment,
 567                                 GtkAdjustment  *vadjustment)
 568 {
 569         EvView *view = EV_VIEW (layout);
 570
 571         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 572         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 573
 574         on_adjustment_value_changed (NULL, view);
 575 }
 576
 577 static void
 578 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 579                            guint           keyval,
 580                            GdkModifierType modifiers,
 581                            GtkScrollType   scroll,
 582                            gboolean        horizontal)
 583 {
 584   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 585
 586   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 587                                 "binding_activated", 2,
 588                                 GTK_TYPE_SCROLL_TYPE, scroll,
 589                                 G_TYPE_BOOLEAN, horizontal);
 590   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 591                                 "binding_activated", 2,
 592                                 GTK_TYPE_SCROLL_TYPE, scroll,
 593                                 G_TYPE_BOOLEAN, horizontal);
 594 }
 595
 596 void
 597 ev_view_scroll (EvView        *view,
 598                 GtkScrollType  scroll,
 599                 gboolean       horizontal)
 600 {
 601         GtkAdjustment *adjustment;
 602         double value, increment;
 603         gboolean first_page = FALSE;
 604         gboolean last_page = FALSE;
 605
 606         view->jump_to_find_result = FALSE;
 607
 608         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 609                 switch (scroll) {
 610                         case GTK_SCROLL_PAGE_BACKWARD:
 611                         case GTK_SCROLL_STEP_BACKWARD:
 612                                 ev_view_previous_page (view);
 613                                 break;
 614                         case GTK_SCROLL_PAGE_FORWARD:
 615                         case GTK_SCROLL_STEP_FORWARD:
 616                                 ev_view_next_page (view);
 617                                 break;
 618                         default:
 619                                 break;
 620                 }
 621                 return;
 622         }
 623
 624         /* Assign values for increment and vertical adjustment */
 625         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 626         increment = adjustment->page_size * 0.75;
 627         value = adjustment->value;
 628
 629         /* Assign boolean for first and last page */
 630         if (view->current_page == 0)
 631                 first_page = TRUE;
 632         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 633                 last_page = TRUE;
 634
 635         switch (scroll) {
 636                 case GTK_SCROLL_PAGE_BACKWARD:
 637                         /* Do not jump backwards if at the first page */
 638                         if (value == (adjustment->lower) && first_page) {
 639                                 /* Do nothing */
 640                                 /* At the top of a page, assign the upper bound limit of previous page */
 641                         } else if (value == (adjustment->lower)) {
 642                                 value = adjustment->upper - adjustment->page_size;
 643                                 ev_view_previous_page (view);
 644                                 /* Jump to the top */
 645                         } else {
 646                                 value = MAX (value - increment, adjustment->lower);
 647                         }
 648                         break;
 649                 case GTK_SCROLL_PAGE_FORWARD:
 650                         /* Do not jump forward if at the last page */
 651                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 652                                 /* Do nothing */
 653                         /* At the bottom of a page, assign the lower bound limit of next page */
 654                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 655                                 value = 0;
 656                                 ev_view_next_page (view);
 657                         /* Jump to the bottom */
 658                         } else {
 659                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 660                         }
 661                         break;
 662                 case GTK_SCROLL_STEP_BACKWARD:
 663                         value -= adjustment->step_increment;
 664                         break;
 665                 case GTK_SCROLL_STEP_FORWARD:
 666                         value += adjustment->step_increment;
 667                         break;
 668                 case GTK_SCROLL_STEP_DOWN:
 669                         value -= adjustment->step_increment / 10;
 670                         break;
 671                 case GTK_SCROLL_STEP_UP:
 672                         value += adjustment->step_increment / 10;
 673                         break;
 674                 default:
 675                         break;
 676         }
 677
 678         value = CLAMP (value, adjustment->lower,
 679                        adjustment->upper - adjustment->page_size);
 680
 681         gtk_adjustment_set_value (adjustment, value);
 682 }
 683
 684 #define MARGIN 5
 685
 686 static void
 687 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 688 {
 689         GtkWidget *widget = GTK_WIDGET (view);
 690         GtkAdjustment *adjustment;
 691         int value;
 692
 693         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 694
 695         adjustment = view->vadjustment;
 696
 697         if (rect->y < adjustment->value) {
 698                 value = MAX (adjustment->lower, rect->y - MARGIN);
 699                 gtk_adjustment_set_value (view->vadjustment, value);
 700         } else if (rect->y + rect->height >
 701                    adjustment->value + widget->allocation.height) {
 702                 value = MIN (adjustment->upper, rect->y + rect->height -
 703                              widget->allocation.height + MARGIN);
 704                 gtk_adjustment_set_value (view->vadjustment, value);
 705         }
 706
 707         adjustment = view->hadjustment;
 708
 709         if (rect->x < adjustment->value) {
 710                 value = MAX (adjustment->lower, rect->x - MARGIN);
 711                 gtk_adjustment_set_value (view->hadjustment, value);
 712         } else if (rect->x + rect->height >
 713                    adjustment->value + widget->allocation.width) {
 714                 value = MIN (adjustment->upper, rect->x + rect->width -
 715                              widget->allocation.width + MARGIN);
 716                 gtk_adjustment_set_value (view->hadjustment, value);
 717         }
 718
 719         gtk_widget_queue_resize (GTK_WIDGET (view));
 720 }
 721
 722 /*** Geometry computations ***/
 723
 724 static void
 725 compute_border (EvView *view, int width, int height, GtkBorder *border)
 726 {
 727         if (view->presentation) {
 728                 border->left = 0;
 729                 border->right = 0;
 730                 border->top = 0;
 731                 border->bottom = 0;
 732         } else {
 733                 ev_document_misc_get_page_border_size (width, height, border);
 734         }
 735 }
 736
 737 static void
 738 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 739 {
 740         int max_width, offset;
 741         GtkBorder border;
 742
 743         g_return_if_fail (y_offset != NULL);
 744
 745         ev_page_cache_get_max_width (view->page_cache, view->rotation, zoom, &max_width);
 746
 747         compute_border (view, max_width, max_width, &border);
 748
 749         if (view->dual_page) {
 750                 ev_page_cache_get_height_to_page (view->page_cache, page,
 751                                                   view->rotation, zoom, NULL, &offset);
 752                 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);
 753         } else {
 754                 ev_page_cache_get_height_to_page (view->page_cache, page,
 755                                                   view->rotation, zoom, &offset, NULL);
 756                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 757         }
 758
 759         *y_offset = offset;
 760         return;
 761 }
 762
 763 static gboolean
 764 get_page_extents (EvView       *view,
 765                   gint          page,
 766                   GdkRectangle *page_area,
 767                   GtkBorder    *border)
 768 {
 769         GtkWidget *widget;
 770         int width, height;
 771
 772         widget = GTK_WIDGET (view);
 773
 774         /* Get the size of the page */
 775         ev_page_cache_get_size (view->page_cache, page,
 776                                 view->rotation,
 777                                 view->scale,
 778                                 &width, &height);
 779         compute_border (view, width, height, border);
 780         page_area->width = width + border->left + border->right;
 781         page_area->height = height + border->top + border->bottom;
 782
 783         if (view->presentation) {
 784                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 785                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 786         } else if (view->continuous) {
 787                 gint max_width;
 788                 gint x, y;
 789
 790                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 791                                              view->scale, &max_width);
 792                 max_width = max_width + border->left + border->right;
 793                 /* Get the location of the bounding box */
 794                 if (view->dual_page) {
 795                         x = view->spacing + ((page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? 0 : 1) * (max_width + view->spacing);
 796                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 797                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 798                                 x = x + (max_width - width - border->left - border->right);
 799                 } else {
 800                         x = view->spacing;
 801                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 802                 }
 803
 804                 get_page_y_offset (view, page, view->scale, &y);
 805
 806                 page_area->x = x;
 807                 page_area->y = y;
 808         } else {
 809                 gint x, y;
 810                 if (view->dual_page) {
 811                         gint width_2, height_2;
 812                         gint max_width = width;
 813                         gint max_height = height;
 814                         GtkBorder overall_border;
 815                         gint other_page;
 816
 817                         other_page = (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? page + 1: page - 1;
 818
 819                         /* First, we get the bounding box of the two pages */
 820                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)
 821                             && (0 <= other_page)) {
 822                                 ev_page_cache_get_size (view->page_cache,
 823                                                         other_page,
 824                                                         view->rotation,
 825                                                         view->scale,
 826                                                         &width_2, &height_2);
 827                                 if (width_2 > width)
 828                                         max_width = width_2;
 829                                 if (height_2 > height)
 830                                         max_height = height_2;
 831                         }
 832                         compute_border (view, max_width, max_height, &overall_border);
 833
 834                         /* Find the offsets */
 835                         x = view->spacing;
 836                         y = view->spacing;
 837
 838                         /* Adjust for being the left or right page */
 839                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 840                                 x = x + max_width - width;
 841                         else
 842                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 843
 844                         y = y + (max_height - height)/2;
 845
 846                         /* Adjust for extra allocation */
 847                         x = x + MAX (0, widget->allocation.width -
 848                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 849                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 850                 } else {
 851                         x = view->spacing;
 852                         y = view->spacing;
 853
 854                         /* Adjust for extra allocation */
 855                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 856                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 857                 }
 858
 859                 page_area->x = x;
 860                 page_area->y = y;
 861         }
 862
 863         return TRUE;
 864 }
 865
 866 static void
 867 view_point_to_doc_point (EvView *view,
 868                          GdkPoint *view_point,
 869                          GdkRectangle *page_area,
 870                          double  *doc_point_x,
 871                          double  *doc_point_y)
 872 {
 873         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 874         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 875 }
 876
 877 static void
 878 view_rect_to_doc_rect (EvView *view,
 879                        GdkRectangle *view_rect,
 880                        GdkRectangle *page_area,
 881                        EvRectangle  *doc_rect)
 882 {
 883         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 884         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 885         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 886         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 887 }
 888
 889 static gboolean
 890 doc_point_to_view_point (EvView       *view,
 891                          int           page,
 892                          EvPoint      *doc_point,
 893                          GdkPoint     *view_point)
 894 {
 895         GdkRectangle page_area;
 896         GtkBorder border;
 897         double x, y, view_x, view_y;
 898         int width, height;
 899
 900         ev_page_cache_get_size (view->page_cache, page,
 901                                 view->rotation,
 902                                 1.0,
 903                                 &width, &height);
 904
 905         if (view->rotation == 0) {
 906                 x = doc_point->x;
 907                 y = doc_point->y;
 908         } else if (view->rotation == 90) {
 909                 x = width - doc_point->y;
 910                 y = doc_point->x;
 911         } else if (view->rotation == 180) {
 912                 x = width - doc_point->x;
 913                 y = height - doc_point->y;
 914         } else if (view->rotation == 270) {
 915                 x = doc_point->y;
 916                 y = height - doc_point->x;
 917         } else {
 918                 g_assert_not_reached ();
 919         }
 920
 921         get_page_extents (view, page, &page_area, &border);
 922
 923         view_x = x * view->scale;
 924         view_y = y * view->scale;
 925         view_point->x = view_x + page_area.x;
 926         view_point->y = view_y + page_area.y;
 927
 928         return (view_x > 0 && view_x <= page_area.width &&
 929                 view_y > 0 && view_y <= page_area.height);
 930 }
 931
 932 static void
 933 doc_rect_to_view_rect (EvView       *view,
 934                        int           page,
 935                        EvRectangle  *doc_rect,
 936                        GdkRectangle *view_rect)
 937 {
 938         GdkRectangle page_area;
 939         GtkBorder border;
 940         double x, y, w, h;
 941         int width, height;
 942
 943         ev_page_cache_get_size (view->page_cache, page,
 944                                 view->rotation,
 945                                 1.0,
 946                                 &width, &height);
 947
 948         if (view->rotation == 0) {
 949                 x = doc_rect->x1;
 950                 y = doc_rect->y1;
 951                 w = doc_rect->x2 - doc_rect->x1;
 952                 h = doc_rect->y2 - doc_rect->y1;
 953         } else if (view->rotation == 90) {
 954                 x = width - doc_rect->y2;
 955                 y = doc_rect->x1;
 956                 w = doc_rect->y2 - doc_rect->y1;
 957                 h = doc_rect->x2 - doc_rect->x1;
 958         } else if (view->rotation == 180) {
 959                 x = width - doc_rect->x2;
 960                 y = height - doc_rect->y2;
 961                 w = doc_rect->x2 - doc_rect->x1;
 962                 h = doc_rect->y2 - doc_rect->y1;
 963         } else if (view->rotation == 270) {
 964                 x = doc_rect->y1;
 965                 y = height - doc_rect->x2;
 966                 w = doc_rect->y2 - doc_rect->y1;
 967                 h = doc_rect->x2 - doc_rect->x1;
 968         } else {
 969                 g_assert_not_reached ();
 970         }
 971
 972         get_page_extents (view, page, &page_area, &border);
 973
 974         view_rect->x = x * view->scale + page_area.x;
 975         view_rect->y = y * view->scale + page_area.y;
 976         view_rect->width = w * view->scale;
 977         view_rect->height = h * view->scale;
 978 }
 979
 980 static void
 981 find_page_at_location (EvView  *view,
 982                        gdouble  x,
 983                        gdouble  y,
 984                        gint    *page,
 985                        gint    *x_offset,
 986                        gint    *y_offset)
 987 {
 988         int i;
 989
 990         if (view->document == NULL)
 991                 return;
 992
 993         g_assert (page);
 994         g_assert (x_offset);
 995         g_assert (y_offset);
 996
 997         for (i = view->start_page; i <= view->end_page; i++) {
 998                 GdkRectangle page_area;
 999                 GtkBorder border;
1000
1001                 if (! get_page_extents (view, i, &page_area, &border))
1002                         continue;
1003
1004                 if ((x >= page_area.x + border.left) &&
1005                     (x < page_area.x + page_area.width - border.right) &&
1006                     (y >= page_area.y + border.top) &&
1007                     (y < page_area.y + page_area.height - border.bottom)) {
1008                         *page = i;
1009                         *x_offset = x - (page_area.x + border.left);
1010                         *y_offset = y - (page_area.y + border.top);
1011                         return;
1012                 }
1013         }
1014
1015         *page = -1;
1016 }
1017
1018 static gboolean
1019 location_in_text (EvView  *view,
1020                   gdouble  x,
1021                   gdouble  y)
1022 {
1023         GdkRegion *region;
1024         gint page = -1;
1025         gint x_offset = 0, y_offset = 0;
1026
1027         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1028
1029         if (page == -1)
1030                 return FALSE;
1031
1032         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1033
1034         if (region)
1035                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1036         else
1037                 return FALSE;
1038 }
1039
1040 static int
1041 ev_view_get_width (EvView *view)
1042 {
1043         return GTK_WIDGET (view)->allocation.width;
1044 }
1045
1046 static int
1047 ev_view_get_height (EvView *view)
1048 {
1049         return GTK_WIDGET (view)->allocation.height;
1050 }
1051
1052 static gboolean
1053 location_in_selected_text (EvView  *view,
1054                            gdouble  x,
1055                            gdouble  y)
1056 {
1057         gint page = -1;
1058         gint x_offset = 0, y_offset = 0;
1059         EvViewSelection *selection;
1060         GList *l = NULL;
1061
1062         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1063                 selection = (EvViewSelection *)l->data;
1064
1065                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1066
1067                 if (page != selection->page)
1068                         continue;
1069
1070                 if (selection->covered_region &&
1071                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1072                         return TRUE;
1073         }
1074
1075         return FALSE;
1076 }
1077
1078 static gboolean
1079 get_doc_point_from_offset (EvView *view,
1080                            gint    page,
1081                            gint    x_offset,
1082                            gint    y_offset,
1083                            gint   *x_new,
1084                            gint   *y_new)
1085 {
1086         int width, height;
1087         double x, y;
1088
1089         ev_page_cache_get_size (view->page_cache, page,
1090                                 view->rotation,
1091                                 1.0,
1092                                 &width, &height);
1093
1094         x_offset = x_offset / view->scale;
1095         y_offset = y_offset / view->scale;
1096
1097         if (view->rotation == 0) {
1098                 x = x_offset;
1099                 y = y_offset;
1100         } else if (view->rotation == 90) {
1101                 x = y_offset;
1102                 y = width - x_offset;
1103         } else if (view->rotation == 180) {
1104                 x = width - x_offset;
1105                 y = height - y_offset;
1106         } else if (view->rotation == 270) {
1107                 x = height - y_offset;
1108                 y = x_offset;
1109         } else {
1110                 g_assert_not_reached ();
1111         }
1112
1113         *x_new = x;
1114         *y_new = y;
1115
1116         return TRUE;
1117 }
1118
1119 /*** Hyperref ***/
1120 static EvLink *
1121 ev_view_get_link_at_location (EvView  *view,
1122                               gdouble  x,
1123                               gdouble  y)
1124 {
1125         gint page = -1;
1126         gint x_offset = 0, y_offset = 0;
1127         gint x_new = 0, y_new = 0;
1128         GList *link_mapping;
1129
1130         if (!EV_IS_DOCUMENT_LINKS (view->document))
1131                 return NULL;
1132
1133         x += view->scroll_x;
1134         y += view->scroll_y;
1135
1136         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1137
1138         if (page == -1)
1139                 return NULL;
1140
1141
1142         if (get_doc_point_from_offset (view, page, x_offset,
1143                                        y_offset, &x_new, &y_new) == FALSE)
1144                 return NULL;
1145
1146         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1147
1148         if (link_mapping)
1149                 return ev_link_mapping_find (link_mapping, x_new, y_new);
1150         else
1151                 return NULL;
1152 }
1153
1154 static void
1155 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1156 {
1157         EvPoint doc_point;
1158         gdouble zoom, left, top;
1159         gboolean change_left, change_top;
1160
1161         left = ev_link_dest_get_left (dest, &change_left);
1162         top = ev_link_dest_get_top (dest, &change_top);
1163
1164         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1165                                        ev_link_dest_get_bottom (dest) - top,
1166                                        ev_view_get_width (view),
1167                                        ev_view_get_height (view), 0, 0);
1168
1169         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1170         ev_view_set_zoom (view, zoom, FALSE);
1171
1172         doc_point.x = change_left ? left : 0;
1173         doc_point.y = change_top ? top : 0;
1174
1175         view->current_page = ev_link_dest_get_page (dest);
1176         if (change_left || change_top)
1177                 view->pending_point = doc_point;
1178         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1179
1180         gtk_widget_queue_resize (GTK_WIDGET (view));
1181 }
1182
1183 static void
1184 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1185 {
1186         EvPoint doc_point;
1187         int doc_width, doc_height, page;
1188         double zoom, left;
1189         gboolean change_left;
1190
1191         page = ev_link_dest_get_page (dest);
1192         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1193
1194         left = ev_link_dest_get_left (dest, &change_left);
1195         doc_point.x = change_left ? left : 0;
1196         doc_point.y = 0;
1197
1198         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1199                                          ev_view_get_width (view),
1200                                          ev_view_get_height (view), 0);
1201
1202         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1203         ev_view_set_zoom (view, zoom, FALSE);
1204
1205         view->current_page = page;
1206         if (change_left)
1207                 view->pending_point = doc_point;
1208         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1209
1210         gtk_widget_queue_resize (GTK_WIDGET (view));
1211 }
1212
1213 static void
1214 goto_fith_dest (EvView *view, EvLinkDest *dest)
1215 {
1216         EvPoint doc_point;
1217         int doc_width, doc_height, page;
1218         gdouble zoom, top;
1219         gboolean change_top;
1220
1221         page = ev_link_dest_get_page (dest);
1222         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1223
1224         top = ev_link_dest_get_top (dest, &change_top);
1225
1226         doc_point.x = 0;
1227         doc_point.y = change_top ? top : 0;
1228
1229         zoom = zoom_for_size_fit_width (doc_width, top,
1230                                         ev_view_get_width (view),
1231                                         ev_view_get_height (view), 0);
1232
1233         ev_view_set_sizing_mode (view, EV_SIZING_FIT_WIDTH);
1234         ev_view_set_zoom (view, zoom, FALSE);
1235
1236         view->current_page = page;
1237         if (change_top)
1238                 view->pending_point = doc_point;
1239         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1240
1241         gtk_widget_queue_resize (GTK_WIDGET (view));
1242 }
1243
1244 static void
1245 goto_fit_dest (EvView *view, EvLinkDest *dest)
1246 {
1247         double zoom;
1248         int doc_width, doc_height;
1249         int page;
1250
1251         page = ev_link_dest_get_page (dest);
1252         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1253
1254         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1255                                        ev_view_get_height (view), 0, 0);
1256
1257         ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
1258         ev_view_set_zoom (view, zoom, FALSE);
1259
1260         view->current_page = page;
1261         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1262
1263         gtk_widget_queue_resize (GTK_WIDGET (view));
1264 }
1265
1266 static void
1267 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1268 {
1269         EvPoint doc_point;
1270         gint page;
1271         gdouble zoom, left, top;
1272         gboolean change_zoom, change_left, change_top;
1273
1274         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1275         page = ev_link_dest_get_page (dest);
1276
1277         if (change_zoom && zoom > 1) {
1278                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1279                 ev_view_set_zoom (view, zoom, FALSE);
1280         }
1281
1282         left = ev_link_dest_get_left (dest, &change_left);
1283         top = ev_link_dest_get_top (dest, &change_top);
1284
1285         doc_point.x = change_left ? left : 0;
1286         doc_point.y = change_top ? top : 0;
1287
1288         view->current_page = page;
1289         if (change_left || change_top)
1290                 view->pending_point = doc_point;
1291         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1292
1293         gtk_widget_queue_resize (GTK_WIDGET (view));
1294 }
1295
1296 static void
1297 goto_dest (EvView *view, EvLinkDest *dest)
1298 {
1299         EvLinkDestType type;
1300         int page, n_pages, current_page;
1301
1302         page = ev_link_dest_get_page (dest);
1303         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1304
1305         if (page < 0 || page >= n_pages)
1306                 return;
1307
1308         current_page = view->current_page;
1309
1310         type = ev_link_dest_get_dest_type (dest);
1311
1312         switch (type) {
1313                 case EV_LINK_DEST_TYPE_PAGE:
1314                         ev_page_cache_set_current_page (view->page_cache, page);
1315                         break;
1316                 case EV_LINK_DEST_TYPE_FIT:
1317                         goto_fit_dest (view, dest);
1318                         break;
1319                 case EV_LINK_DEST_TYPE_FITH:
1320                         goto_fith_dest (view, dest);
1321                         break;
1322                 case EV_LINK_DEST_TYPE_FITV:
1323                         goto_fitv_dest (view, dest);
1324                         break;
1325                 case EV_LINK_DEST_TYPE_FITR:
1326                         goto_fitr_dest (view, dest);
1327                         break;
1328                 case EV_LINK_DEST_TYPE_XYZ:
1329                         goto_xyz_dest (view, dest);
1330                         break;
1331                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1332                         ev_page_cache_set_page_label (view->page_cache, ev_link_dest_get_page_label (dest));
1333                         break;
1334                 default:
1335                         g_assert_not_reached ();
1336         }
1337
1338         if (current_page != view->current_page)
1339                 ev_page_cache_set_current_page (view->page_cache,
1340                                                 view->current_page);
1341 }
1342
1343 static void
1344 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1345 {
1346         EvLinkDestType type;
1347
1348         type = ev_link_dest_get_dest_type (dest);
1349
1350         if (type == EV_LINK_DEST_TYPE_NAMED) {
1351                 EvLinkDest  *dest2;
1352                 const gchar *named_dest;
1353
1354                 named_dest = ev_link_dest_get_named_dest (dest);
1355                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1356                                                           named_dest);
1357                 if (dest2) {
1358                         goto_dest (view, dest2);
1359                         g_object_unref (dest2);
1360                 }
1361
1362                 return;
1363         }
1364
1365         goto_dest (view, dest);
1366 }
1367
1368 void
1369 ev_view_handle_link (EvView *view, EvLink *link)
1370 {
1371         EvLinkAction    *action = NULL;
1372         EvLinkActionType type;
1373
1374         action = ev_link_get_action (link);
1375         if (!action)
1376                 return;
1377
1378         type = ev_link_action_get_action_type (action);
1379
1380         switch (type) {
1381                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1382                         EvLinkDest *dest;
1383
1384                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1385
1386                         dest = ev_link_action_get_dest (action);
1387                         ev_view_goto_dest (view, dest);
1388                 }
1389                         break;
1390                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1391                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1392                 case EV_LINK_ACTION_TYPE_LAUNCH:
1393                 case EV_LINK_ACTION_TYPE_NAMED:
1394                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1395                         break;
1396         }
1397 }
1398
1399 gchar *
1400 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1401 {
1402         EvLinkDestType type;
1403         gchar *msg = NULL;
1404
1405         type = ev_link_dest_get_dest_type (dest);
1406
1407         switch (type) {
1408                 case EV_LINK_DEST_TYPE_NAMED: {
1409                         EvLinkDest  *dest2;
1410                         const gchar *named_dest;
1411
1412                         named_dest = ev_link_dest_get_named_dest (dest);
1413                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1414                                                                   named_dest);
1415                         if (dest2) {
1416                                 msg = ev_page_cache_get_page_label (view->page_cache,
1417                                                                     ev_link_dest_get_page (dest2));
1418                                 g_object_unref (dest2);
1419                         }
1420                 }
1421
1422                         break;
1423                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1424                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1425                 }
1426                         break;
1427                 default:
1428                         msg = ev_page_cache_get_page_label (view->page_cache,
1429                                                             ev_link_dest_get_page (dest));
1430         }
1431
1432         return msg;
1433 }
1434
1435 static char *
1436 tip_from_action_named (EvLinkAction *action)
1437 {
1438         const gchar *name = ev_link_action_get_name (action);
1439
1440         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1441                 return g_strdup (_("Go to first page"));
1442         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1443                 return g_strdup (_("Go to previous page"));
1444         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1445                 return g_strdup (_("Go to next page"));
1446         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1447                 return g_strdup (_("Go to last page"));
1448         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1449                 return g_strdup (_("Go to page"));
1450         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1451                 return g_strdup (_("Find"));
1452         }
1453
1454         return NULL;
1455 }
1456
1457 static char *
1458 tip_from_link (EvView *view, EvLink *link)
1459 {
1460         EvLinkAction *action;
1461         EvLinkActionType type;
1462         char *msg = NULL;
1463         char *page_label;
1464         const char *title;
1465
1466         action = ev_link_get_action (link);
1467         title = ev_link_get_title (link);
1468
1469         if (!action)
1470                 return title ? g_strdup (title) : NULL;
1471
1472         type = ev_link_action_get_action_type (action);
1473
1474         switch (type) {
1475                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1476                         page_label = ev_view_page_label_from_dest (view,
1477                                                                    ev_link_action_get_dest (action));
1478                         if (page_label) {
1479                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1480                                 g_free (page_label);
1481                         }
1482                         break;
1483                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1484                         if (title) {
1485                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1486                                                        ev_link_action_get_filename (action));
1487                         } else {
1488                                 msg = g_strdup_printf (_("Go to file “%s”"),
1489                                                        ev_link_action_get_filename (action));
1490                         }
1491                         break;
1492                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1493                         msg = g_strdup (ev_link_action_get_uri (action));
1494                         break;
1495                 case EV_LINK_ACTION_TYPE_LAUNCH:
1496                         msg = g_strdup_printf (_("Launch %s"),
1497                                                ev_link_action_get_filename (action));
1498                         break;
1499                 case EV_LINK_ACTION_TYPE_NAMED:
1500                         msg = tip_from_action_named (action);
1501                         break;
1502                 default:
1503                         if (title)
1504                                 msg = g_strdup (title);
1505                         break;
1506         }
1507
1508         return msg;
1509 }
1510
1511 static void
1512 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1513 {
1514         EvLink       *link;
1515         EvFormField  *field;
1516         EvAnnotation *annot = NULL;
1517
1518         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1519                 return;
1520
1521         if (view->drag_info.in_drag) {
1522                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1523                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1524                 return;
1525         }
1526
1527         if (view->scroll_info.autoscrolling) {
1528                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1529                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1530                 return;
1531         }
1532
1533         link = ev_view_get_link_at_location (view, x, y);
1534         if (link) {
1535                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1536         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1537                 if (field->is_read_only) {
1538                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1539                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1540                             view->cursor == EV_VIEW_CURSOR_DRAG)
1541                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1542                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1543                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1544                 } else {
1545                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1546                 }
1547         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1548                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1549         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1550                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1551         } else {
1552                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1553                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1554                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1555                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1556                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1557         }
1558
1559         if (link || annot)
1560                 g_object_set (view, "has-tooltip", TRUE, NULL);
1561 }
1562
1563 /*** Images ***/
1564 static EvImage *
1565 ev_view_get_image_at_location (EvView  *view,
1566                                gdouble  x,
1567                                gdouble  y)
1568 {
1569         gint page = -1;
1570         gint x_offset = 0, y_offset = 0;
1571         gint x_new = 0, y_new = 0;
1572         GList *image_mapping;
1573
1574         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1575                 return NULL;
1576
1577         x += view->scroll_x;
1578         y += view->scroll_y;
1579
1580         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1581
1582         if (page == -1)
1583                 return NULL;
1584
1585         if (get_doc_point_from_offset (view, page, x_offset,
1586                                        y_offset, &x_new, &y_new) == FALSE)
1587                 return NULL;
1588
1589         image_mapping = ev_pixbuf_cache_get_image_mapping (view->pixbuf_cache, page);
1590
1591         if (image_mapping)
1592                 return ev_image_mapping_find (image_mapping, x_new, y_new);
1593         else
1594                 return NULL;
1595 }
1596
1597 /*** Forms ***/
1598 static EvFormField *
1599 ev_view_get_form_field_at_location (EvView  *view,
1600                                     gdouble  x,
1601                                     gdouble  y)
1602 {
1603         gint page = -1;
1604         gint x_offset = 0, y_offset = 0;
1605         gint x_new = 0, y_new = 0;
1606         GList *forms_mapping;
1607
1608         if (!EV_IS_DOCUMENT_FORMS (view->document))
1609                 return NULL;
1610
1611         x += view->scroll_x;
1612         y += view->scroll_y;
1613
1614         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1615
1616         if (page == -1)
1617                 return NULL;
1618
1619         if (get_doc_point_from_offset (view, page, x_offset,
1620                                        y_offset, &x_new, &y_new) == FALSE)
1621                 return NULL;
1622
1623         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, page);
1624
1625         if (forms_mapping)
1626                 return ev_form_field_mapping_find (forms_mapping, x_new, y_new);
1627         else
1628                 return NULL;
1629 }
1630
1631 static GdkRegion *
1632 ev_view_form_field_get_region (EvView      *view,
1633                                EvFormField *field)
1634 {
1635         EvRectangle  field_area;
1636         GdkRectangle view_area;
1637         GList       *forms_mapping;
1638
1639         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1640                                                                 field->page->index);
1641         ev_form_field_mapping_get_area (forms_mapping, field, &field_area);
1642         doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
1643         view_area.x -= view->scroll_x;
1644         view_area.y -= view->scroll_y;
1645
1646         return gdk_region_rectangle (&view_area);
1647 }
1648
1649 static gboolean
1650 ev_view_forms_remove_widgets (EvView *view)
1651 {
1652         ev_view_remove_all (view);
1653
1654         return FALSE;
1655 }
1656
1657 static void
1658 ev_view_form_field_destroy (GtkWidget *widget,
1659                             EvView    *view)
1660 {
1661         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1662 }
1663
1664 static GtkWidget *
1665 ev_view_form_field_button_create_widget (EvView      *view,
1666                                          EvFormField *field)
1667 {
1668         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1669         GdkRegion         *field_region = NULL;
1670
1671         switch (field_button->type) {
1672                 case EV_FORM_FIELD_BUTTON_PUSH:
1673                         return NULL;
1674                 case EV_FORM_FIELD_BUTTON_CHECK:
1675                 case EV_FORM_FIELD_BUTTON_RADIO: {
1676                         gboolean  state;
1677                         GList    *forms_mapping, *l;
1678
1679                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1680                                                                                field);
1681
1682                         /* FIXME: it actually depends on NoToggleToOff flags */
1683                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1684                             state && field_button->state)
1685                                 return NULL;
1686
1687                         field_region = ev_view_form_field_get_region (view, field);
1688
1689                         /* For radio buttons and checkbox buttons that are in a set
1690                          * we need to update also the region for the current selected item
1691                          */
1692                         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1693                                                                                 field->page->index);
1694                         for (l = forms_mapping; l; l = g_list_next (l)) {
1695                                 EvFormField *button = ((EvFormFieldMapping *)(l->data))->field;
1696                                 GdkRegion   *button_region;
1697
1698                                 if (button->id == field->id)
1699                                         continue;
1700
1701                                 /* FIXME: only buttons in the same group should be updated */
1702                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1703                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1704                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1705                                         continue;
1706
1707                                 button_region = ev_view_form_field_get_region (view, button);
1708                                 gdk_region_union (field_region, button_region);
1709                                 gdk_region_destroy (button_region);
1710                         }
1711
1712                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
1713                                                                        field, !state);
1714                         field_button->state = !state;
1715                 }
1716                         break;
1717         }
1718
1719         ev_view_reload_page (view, field->page->index, field_region);
1720         gdk_region_destroy (field_region);
1721
1722         return NULL;
1723 }
1724
1725 static void
1726 ev_view_form_field_text_save (EvView    *view,
1727                               GtkWidget *widget)
1728 {
1729         EvFormField *field;
1730
1731         if (!view->document)
1732                 return;
1733
1734         field = g_object_get_data (G_OBJECT (widget), "form-field");
1735
1736         if (field->changed) {
1737                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1738                 GdkRegion       *field_region;
1739
1740                 field_region = ev_view_form_field_get_region (view, field);
1741
1742                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
1743                                                             field, field_text->text);
1744                 field->changed = FALSE;
1745                 ev_view_reload_page (view, field->page->index, field_region);
1746                 gdk_region_destroy (field_region);
1747         }
1748 }
1749
1750 static void
1751 ev_view_form_field_text_changed (GtkWidget   *widget,
1752                                  EvFormField *field)
1753 {
1754         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1755         gchar           *text = NULL;
1756
1757         if (GTK_IS_ENTRY (widget)) {
1758                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
1759         } else if (GTK_IS_TEXT_BUFFER (widget)) {
1760                 GtkTextIter start, end;
1761
1762                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
1763                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
1764                                                  &start, &end, FALSE);
1765         }
1766
1767         if (!field_text->text ||
1768             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
1769                 g_free (field_text->text);
1770                 field_text->text = text;
1771                 field->changed = TRUE;
1772         }
1773 }
1774
1775 static GtkWidget *
1776 ev_view_form_field_text_create_widget (EvView      *view,
1777                                        EvFormField *field)
1778 {
1779         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1780         GtkWidget       *text = NULL;
1781         gchar           *txt;
1782
1783         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
1784                                                           field);
1785
1786         switch (field_text->type) {
1787                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
1788                         /* TODO */
1789                 case EV_FORM_FIELD_TEXT_NORMAL:
1790                         text = gtk_entry_new ();
1791                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
1792                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
1793                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
1794
1795                         if (txt) {
1796                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
1797                                 g_free (txt);
1798                         }
1799
1800                         g_signal_connect (text, "changed",
1801                                           G_CALLBACK (ev_view_form_field_text_changed),
1802                                           field);
1803                         g_signal_connect_after (text, "activate",
1804                                                 G_CALLBACK (ev_view_form_field_destroy),
1805                                                 view);
1806                         break;
1807                 case EV_FORM_FIELD_TEXT_MULTILINE: {
1808                         GtkTextBuffer *buffer;
1809
1810                         text = gtk_text_view_new ();
1811                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
1812
1813                         if (txt) {
1814                                 gtk_text_buffer_set_text (buffer, txt, -1);
1815                                 g_free (txt);
1816                         }
1817
1818                         g_signal_connect (buffer, "changed",
1819                                           G_CALLBACK (ev_view_form_field_text_changed),
1820                                           field);
1821                 }
1822                         break;
1823         }
1824
1825         g_object_weak_ref (G_OBJECT (text),
1826                            (GWeakNotify)ev_view_form_field_text_save,
1827                            view);
1828
1829         return text;
1830 }
1831
1832 static void
1833 ev_view_form_field_choice_save (EvView    *view,
1834                                 GtkWidget *widget)
1835 {
1836         EvFormField *field;
1837
1838         if (!view->document)
1839                 return;
1840
1841         field = g_object_get_data (G_OBJECT (widget), "form-field");
1842
1843         if (field->changed) {
1844                 GList             *l;
1845                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1846                 GdkRegion         *field_region;
1847
1848                 field_region = ev_view_form_field_get_region (view, field);
1849
1850                 if (field_choice->is_editable) {
1851                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
1852                                                                       field, field_choice->text);
1853                 } else {
1854                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
1855                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
1856                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
1857                                                                                  field,
1858                                                                                  GPOINTER_TO_INT (l->data));
1859                         }
1860                 }
1861                 field->changed = FALSE;
1862                 ev_view_reload_page (view, field->page->index, field_region);
1863                 gdk_region_destroy (field_region);
1864         }
1865 }
1866
1867 static void
1868 ev_view_form_field_choice_changed (GtkWidget   *widget,
1869                                    EvFormField *field)
1870 {
1871         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1872
1873         if (GTK_IS_COMBO_BOX (widget)) {
1874                 gint item;
1875
1876                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
1877                 if (!field_choice->selected_items ||
1878                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
1879                         g_list_free (field_choice->selected_items);
1880                         field_choice->selected_items = NULL;
1881                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1882                                                                        GINT_TO_POINTER (item));
1883                         field->changed = TRUE;
1884                 }
1885
1886                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
1887                         gchar *text;
1888
1889                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
1890                         if (!field_choice->text ||
1891                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
1892                                 g_free (field_choice->text);
1893                                 field_choice->text = text;
1894                                 field->changed = TRUE;
1895                         }
1896                 }
1897         } else if (GTK_IS_TREE_SELECTION (widget)) {
1898                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
1899                 GtkTreeModel     *model;
1900                 GList            *items, *l;
1901
1902                 items = gtk_tree_selection_get_selected_rows (selection, &model);
1903                 g_list_free (field_choice->selected_items);
1904                 field_choice->selected_items = NULL;
1905
1906                 for (l = items; l && l->data; l = g_list_next (l)) {
1907                         GtkTreeIter  iter;
1908                         GtkTreePath *path = (GtkTreePath *)l->data;
1909                         gint         item;
1910
1911                         gtk_tree_model_get_iter (model, &iter, path);
1912                         gtk_tree_model_get (model, &iter, 1, &item, -1);
1913
1914                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1915                                                                        GINT_TO_POINTER (item));
1916
1917                         gtk_tree_path_free (path);
1918                 }
1919
1920                 g_list_free (items);
1921
1922                 field->changed = TRUE;
1923         }
1924 }
1925
1926 static GtkWidget *
1927 ev_view_form_field_choice_create_widget (EvView      *view,
1928                                          EvFormField *field)
1929 {
1930         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1931         GtkWidget         *choice;
1932         GtkTreeModel      *model;
1933         gint               n_items, i;
1934         gint               selected_item = 0;
1935
1936         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
1937                                                                    field);
1938         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
1939         for (i = 0; i < n_items; i++) {
1940                 GtkTreeIter iter;
1941                 gchar      *item;
1942
1943                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
1944                                                                      field, i);
1945                 if (ev_document_forms_form_field_choice_is_item_selected (
1946                             EV_DOCUMENT_FORMS (view->document), field, i)) {
1947                         selected_item = i;
1948                         /* FIXME: we need a get_selected_items function in poppler */
1949                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1950                                                                        GINT_TO_POINTER (i));
1951                 }
1952
1953                 if (item) {
1954                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
1955                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
1956                                             0, item,
1957                                             1, i,
1958                                             -1);
1959                         g_free (item);
1960                 }
1961         }
1962
1963         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
1964                 GtkCellRenderer  *renderer;
1965                 GtkWidget        *tree_view;
1966                 GtkTreeSelection *selection;
1967
1968                 tree_view = gtk_tree_view_new_with_model (model);
1969                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
1970
1971                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
1972                 if (field_choice->multi_select) {
1973                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
1974                 }
1975
1976                 /* TODO: set selected items */
1977
1978                 renderer = gtk_cell_renderer_text_new ();
1979                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
1980                                                              0,
1981                                                              "choix", renderer,
1982                                                              "text", 0,
1983                                                              NULL);
1984
1985                 choice = gtk_scrolled_window_new (NULL, NULL);
1986                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
1987                                                 GTK_POLICY_AUTOMATIC,
1988                                                 GTK_POLICY_AUTOMATIC);
1989                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
1990                 gtk_widget_show (tree_view);
1991
1992                 g_signal_connect (selection, "changed",
1993                                   G_CALLBACK (ev_view_form_field_choice_changed),
1994                                   field);
1995                 g_signal_connect_after (selection, "changed",
1996                                         G_CALLBACK (ev_view_form_field_destroy),
1997                                         view);
1998         } else if (field_choice->is_editable) { /* ComboBoxEntry */
1999                 gchar *text;
2000
2001                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2002                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2003                 if (text) {
2004                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2005                         g_free (text);
2006                 }
2007
2008                 g_signal_connect (choice, "changed",
2009                                   G_CALLBACK (ev_view_form_field_choice_changed),
2010                                   field);
2011                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
2012                                         G_CALLBACK (ev_view_form_field_destroy),
2013                                         view);
2014         } else { /* ComboBoxText */
2015                 GtkCellRenderer *renderer;
2016
2017                 choice = gtk_combo_box_new_with_model (model);
2018                 renderer = gtk_cell_renderer_text_new ();
2019                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2020                                             renderer, TRUE);
2021                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2022                                                 renderer,
2023                                                 "text", 0,
2024                                                 NULL);
2025                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2026                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2027
2028                 g_signal_connect (choice, "changed",
2029                                   G_CALLBACK (ev_view_form_field_choice_changed),
2030                                   field);
2031                 g_signal_connect_after (choice, "changed",
2032                                         G_CALLBACK (ev_view_form_field_destroy),
2033                                         view);
2034         }
2035
2036         g_object_unref (model);
2037
2038         g_object_weak_ref (G_OBJECT (choice),
2039                            (GWeakNotify)ev_view_form_field_choice_save,
2040                            view);
2041
2042         return choice;
2043 }
2044
2045 static void
2046 ev_view_handle_form_field (EvView      *view,
2047                            EvFormField *field,
2048                            gdouble      x,
2049                            gdouble      y)
2050 {
2051         GtkWidget   *field_widget = NULL;
2052         GList       *form_field_mapping;
2053         EvRectangle  field_area;
2054         GdkRectangle view_area;
2055
2056         if (field->is_read_only)
2057                 return;
2058
2059         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2060                 field_widget = ev_view_form_field_button_create_widget (view, field);
2061         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2062                 field_widget = ev_view_form_field_text_create_widget (view, field);
2063         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2064                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2065         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2066                 /* TODO */
2067         }
2068
2069         /* Form field doesn't require a widget */
2070         if (!field_widget)
2071                 return;
2072
2073         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2074                                 g_object_ref (field),
2075                                 (GDestroyNotify)g_object_unref);
2076
2077         form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, field->page->index);
2078         ev_form_field_mapping_get_area (form_field_mapping, field, &field_area);
2079
2080         doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
2081         view_area.x -= view->scroll_x;
2082         view_area.y -= view->scroll_y;
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                 EvAnnotationMapping *annotation_mapping;
2307                 EvAnnotation        *annot;
2308                 EvViewWindowChild   *child;
2309                 GtkWidget           *window;
2310                 EvRectangle         *doc_rect;
2311                 GdkRectangle         view_rect;
2312
2313                 annotation_mapping = (EvAnnotationMapping *)l->data;
2314                 annot = annotation_mapping->annotation;
2315
2316                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2317                         continue;
2318
2319                 window = g_object_get_data (G_OBJECT (annot), "popup");
2320                 if (window) {
2321                         ev_view_window_child_move_with_parent (view, window);
2322                         continue;
2323                 }
2324
2325                 /* Look if we already have a popup for this annot */
2326                 child = ev_view_find_window_child_for_annot (view, page, annot);
2327                 window = child ? child->window : NULL;
2328                 if (window) {
2329                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2330                         g_object_set_data (G_OBJECT (annot), "popup", window);
2331                         ev_view_window_child_move_with_parent (view, window);
2332                 } else {
2333                         window = ev_annotation_window_new (annot, parent);
2334                         g_signal_connect (window, "grab_focus",
2335                                           G_CALLBACK (annotation_window_grab_focus),
2336                                           view);
2337                         g_signal_connect (window, "closed",
2338                                           G_CALLBACK (annotation_window_closed),
2339                                           view);
2340                         g_signal_connect (window, "moved",
2341                                           G_CALLBACK (annotation_window_moved),
2342                                           view);
2343                         g_object_set_data (G_OBJECT (annot), "popup", window);
2344
2345                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2346                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2347                         view_rect.x -= view->scroll_x;
2348                         view_rect.y -= view->scroll_y;
2349
2350                         ev_view_window_child_put (view, window, page,
2351                                                   view_rect.x, view_rect.y,
2352                                                   doc_rect->x1, doc_rect->y1);
2353
2354                         g_object_weak_ref (G_OBJECT (annot),
2355                                            (GWeakNotify)ev_view_annotation_save,
2356                                            view);
2357                 }
2358         }
2359 }
2360
2361 static void
2362 hide_annotation_windows (EvView *view,
2363                          gint    page)
2364 {
2365         GList *annots, *l;
2366
2367         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2368
2369         for (l = annots; l && l->data; l = g_list_next (l)) {
2370                 EvAnnotationMapping *annotation_mapping;
2371                 EvAnnotation        *annot;
2372                 GtkWidget           *window;
2373
2374                 annotation_mapping = (EvAnnotationMapping *)l->data;
2375                 annot = annotation_mapping->annotation;
2376
2377                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2378                         continue;
2379
2380                 window = g_object_get_data (G_OBJECT (annot), "popup");
2381                 if (window)
2382                         gtk_widget_hide (window);
2383         }
2384 }
2385
2386 static EvAnnotation *
2387 ev_view_get_annotation_at_location (EvView  *view,
2388                                     gdouble  x,
2389                                     gdouble  y)
2390 {
2391         gint page = -1;
2392         gint x_offset = 0, y_offset = 0;
2393         gint x_new = 0, y_new = 0;
2394         GList *annotations_mapping;
2395
2396         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2397                 return NULL;
2398
2399         x += view->scroll_x;
2400         y += view->scroll_y;
2401
2402         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
2403
2404         if (page == -1)
2405                 return NULL;
2406
2407         if (get_doc_point_from_offset (view, page, x_offset,
2408                                        y_offset, &x_new, &y_new) == FALSE)
2409                 return NULL;
2410
2411         annotations_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2412
2413         if (annotations_mapping)
2414                 return ev_annotation_mapping_find (annotations_mapping, x_new, y_new);
2415         else
2416                 return NULL;
2417 }
2418
2419 static void
2420 ev_view_handle_annotation (EvView       *view,
2421                            EvAnnotation *annot,
2422                            gdouble       x,
2423                            gdouble       y)
2424 {
2425         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2426                 GtkWidget *window;
2427
2428                 window = g_object_get_data (G_OBJECT (annot), "popup");
2429                 if (window) {
2430                         EvViewWindowChild *child;
2431
2432                         child = ev_view_get_window_child (view, window);
2433                         if (!child->visible) {
2434                                 child->visible = TRUE;
2435                                 ev_view_window_child_move (view, child, child->x, child->y);
2436                                 gtk_widget_show (window);
2437                         }
2438                 }
2439         }
2440 }
2441
2442 /*** GtkWidget implementation ***/
2443
2444 static void
2445 ev_view_size_request_continuous_dual_page (EvView         *view,
2446                                            GtkRequisition *requisition)
2447 {
2448         int max_width;
2449         gint n_pages;
2450         GtkBorder border;
2451
2452         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2453                                      view->scale, &max_width);
2454         compute_border (view, max_width, max_width, &border);
2455
2456         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
2457
2458         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2459         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
2460
2461         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2462                 requisition->width = 1;
2463         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2464                 requisition->width = 1;
2465                 /* FIXME: This could actually be set on one page docs or docs
2466                  * with a strange aspect ratio. */
2467                 /* requisition->height = 1;*/
2468         }
2469 }
2470
2471 static void
2472 ev_view_size_request_continuous (EvView         *view,
2473                                  GtkRequisition *requisition)
2474 {
2475         int max_width;
2476         int n_pages;
2477         GtkBorder border;
2478
2479
2480         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2481                                      view->scale, &max_width);
2482         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2483         compute_border (view, max_width, max_width, &border);
2484
2485         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2486         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
2487
2488         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2489                 requisition->width = 1;
2490         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2491                 requisition->width = 1;
2492                 /* FIXME: This could actually be set on one page docs or docs
2493                  * with a strange aspect ratio. */
2494                 /* requisition->height = 1;*/
2495         }
2496 }
2497
2498 static void
2499 ev_view_size_request_dual_page (EvView         *view,
2500                                 GtkRequisition *requisition)
2501 {
2502         GtkBorder border;
2503         gint width, height;
2504
2505         /* Find the largest of the two. */
2506         ev_page_cache_get_size (view->page_cache,
2507                                 view->current_page,
2508                                 view->rotation,
2509                                 view->scale,
2510                                 &width, &height);
2511         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
2512                 gint width_2, height_2;
2513                 ev_page_cache_get_size (view->page_cache,
2514                                         view->current_page + 1,
2515                                         view->rotation,
2516                                         view->scale,
2517                                         &width_2, &height_2);
2518                 if (width_2 > width) {
2519                         width = width_2;
2520                         height = height_2;
2521                 }
2522         }
2523         compute_border (view, width, height, &border);
2524
2525         requisition->width = ((width + border.left + border.right) * 2) +
2526                 (view->spacing * 3);
2527         requisition->height = (height + border.top + border.bottom) +
2528                 (view->spacing * 2);
2529
2530         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2531                 requisition->width = 1;
2532         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2533                 requisition->width = 1;
2534                 requisition->height = 1;
2535         }
2536 }
2537
2538 static void
2539 ev_view_size_request_single_page (EvView         *view,
2540                                   GtkRequisition *requisition)
2541 {
2542         GtkBorder border;
2543         gint width, height;
2544
2545         ev_page_cache_get_size (view->page_cache,
2546                                 view->current_page,
2547                                 view->rotation,
2548                                 view->scale,
2549                                 &width, &height);
2550         compute_border (view, width, height, &border);
2551
2552         requisition->width = width + border.left + border.right + (2 * view->spacing);
2553         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2554
2555         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2556                 requisition->width = 1;
2557                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2558         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2559                 requisition->width = 1;
2560                 requisition->height = 1;
2561         }
2562 }
2563
2564 static void
2565 ev_view_size_request (GtkWidget      *widget,
2566                       GtkRequisition *requisition)
2567 {
2568         EvView *view = EV_VIEW (widget);
2569
2570         if (view->document == NULL) {
2571                 requisition->width = 1;
2572                 requisition->height = 1;
2573                 return;
2574         }
2575
2576         if (view->presentation) {
2577                 requisition->width = 1;
2578                 requisition->height = 1;
2579                 return;
2580         }
2581
2582         if (view->continuous && view->dual_page)
2583                 ev_view_size_request_continuous_dual_page (view, requisition);
2584         else if (view->continuous)
2585                 ev_view_size_request_continuous (view, requisition);
2586         else if (view->dual_page)
2587                 ev_view_size_request_dual_page (view, requisition);
2588         else
2589                 ev_view_size_request_single_page (view, requisition);
2590 }
2591
2592 static void
2593 ev_view_size_allocate (GtkWidget      *widget,
2594                        GtkAllocation  *allocation)
2595 {
2596         EvView *view = EV_VIEW (widget);
2597         GList  *children, *l;
2598         gint    root_x, root_y;
2599
2600         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2601
2602         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2603             view->sizing_mode == EV_SIZING_BEST_FIT) {
2604                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
2605                 ev_view_size_request (widget, &widget->requisition);
2606         }
2607
2608         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2609         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2610
2611         if (view->document)
2612                 view_update_range_and_current_page (view);
2613
2614         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2615         view->pending_resize = FALSE;
2616
2617         children = gtk_container_get_children (GTK_CONTAINER (widget));
2618         for (l = children; l && l->data; l = g_list_next (l)) {
2619                 EvFormField   *field;
2620                 EvRectangle    field_area;
2621                 GdkRectangle   view_area;
2622                 GList         *form_field_mapping;
2623                 GtkAllocation  child_allocation;
2624                 GtkRequisition child_requisition;
2625                 GtkWidget     *child = (GtkWidget *)l->data;
2626
2627                 field = g_object_get_data (G_OBJECT (child), "form-field");
2628                 if (!field)
2629                         continue;
2630
2631                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2632                                                                              field->page->index);
2633                 ev_form_field_mapping_get_area (form_field_mapping, field, &field_area);
2634
2635                 doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
2636                 view_area.x -= view->scroll_x;
2637                 view_area.y -= view->scroll_y;
2638
2639                 gtk_widget_size_request (child, &child_requisition);
2640                 if (child_requisition.width != view_area.width ||
2641                     child_requisition.height != view_area.height)
2642                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2643
2644                 gtk_container_child_get (GTK_CONTAINER (widget),
2645                                          child,
2646                                          "x", &child_allocation.x,
2647                                          "y", &child_allocation.y,
2648                                          NULL);
2649                 if (child_allocation.x != view_area.x ||
2650                     child_allocation.y != view_area.y) {
2651                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2652                 }
2653         }
2654         g_list_free (children);
2655
2656         if (view->window_children)
2657                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2658                                        &root_x, &root_y);
2659
2660         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2661                 EvViewWindowChild *child;
2662                 EvRectangle        doc_rect;
2663                 GdkRectangle       view_rect;
2664
2665                 child = (EvViewWindowChild *)l->data;
2666
2667                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
2668                 if (child->moved) {
2669                         doc_rect.x1 = child->orig_x;
2670                         doc_rect.y1 = child->orig_y;
2671                 }
2672                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
2673                 view_rect.x -= view->scroll_x;
2674                 view_rect.y -= view->scroll_y;
2675
2676                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
2677                         child->parent_x = root_x;
2678                         child->parent_y = root_y;
2679                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
2680                 }
2681         }
2682 }
2683
2684 static void
2685 ev_view_realize (GtkWidget *widget)
2686 {
2687         EvView *view = EV_VIEW (widget);
2688
2689         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
2690                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
2691
2692         gdk_window_set_events (view->layout.bin_window,
2693                                (gdk_window_get_events (view->layout.bin_window) |
2694                                 GDK_EXPOSURE_MASK |
2695                                 GDK_BUTTON_PRESS_MASK |
2696                                 GDK_BUTTON_RELEASE_MASK |
2697                                 GDK_SCROLL_MASK |
2698                                 GDK_KEY_PRESS_MASK |
2699                                 GDK_POINTER_MOTION_MASK |
2700                                 GDK_POINTER_MOTION_HINT_MASK |
2701                                 GDK_ENTER_NOTIFY_MASK |
2702                                 GDK_LEAVE_NOTIFY_MASK));
2703
2704         if (view->presentation)
2705                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
2706         else
2707                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
2708 }
2709
2710 static gboolean
2711 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
2712 {
2713         EvView *view = EV_VIEW (widget);
2714         guint state;
2715
2716         state = event->state & gtk_accelerator_get_default_mod_mask ();
2717
2718         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
2719                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
2720
2721                 if (event->direction == GDK_SCROLL_UP ||
2722                     event->direction == GDK_SCROLL_LEFT) {
2723                         if (ev_view_can_zoom_in (view)) {
2724                                 ev_view_zoom_in (view);
2725                         }
2726                 } else {
2727                         if (ev_view_can_zoom_out (view)) {
2728                                 ev_view_zoom_out (view);
2729                         }
2730                 }
2731
2732                 return TRUE;
2733         }
2734
2735         view->jump_to_find_result = FALSE;
2736
2737         /* Shift+Wheel scrolls the in the perpendicular direction */
2738         if (state & GDK_SHIFT_MASK) {
2739                 if (event->direction == GDK_SCROLL_UP)
2740                         event->direction = GDK_SCROLL_LEFT;
2741                 else if (event->direction == GDK_SCROLL_LEFT)
2742                         event->direction = GDK_SCROLL_UP;
2743                 else if (event->direction == GDK_SCROLL_DOWN)
2744                         event->direction = GDK_SCROLL_RIGHT;
2745                 else if (event->direction == GDK_SCROLL_RIGHT)
2746                         event->direction = GDK_SCROLL_DOWN;
2747
2748                 event->state &= ~GDK_SHIFT_MASK;
2749                 state &= ~GDK_SHIFT_MASK;
2750         }
2751
2752         if (state == 0 && view->presentation) {
2753                 switch (event->direction) {
2754                         case GDK_SCROLL_DOWN:
2755                         case GDK_SCROLL_RIGHT:
2756                                 ev_view_next_page (view);
2757                                 break;
2758                         case GDK_SCROLL_UP:
2759                         case GDK_SCROLL_LEFT:
2760                                 ev_view_previous_page (view);
2761                                 break;
2762                 }
2763
2764                 return TRUE;
2765         }
2766
2767         return FALSE;
2768 }
2769
2770 static EvViewSelection *
2771 find_selection_for_page (EvView *view,
2772                          gint    page)
2773 {
2774         GList *list;
2775
2776         for (list = view->selection_info.selections; list != NULL; list = list->next) {
2777                 EvViewSelection *selection;
2778
2779                 selection = (EvViewSelection *) list->data;
2780
2781                 if (selection->page == page)
2782                         return selection;
2783         }
2784
2785         return NULL;
2786 }
2787
2788 static void
2789 draw_end_presentation_page (EvView       *view,
2790                             GdkRectangle *page_area)
2791 {
2792         PangoLayout *layout;
2793         PangoFontDescription *font_desc;
2794         gchar *markup;
2795         const gchar *text = _("End of presentation. Press Escape to exit.");
2796
2797         if (view->presentation_state != EV_PRESENTATION_END)
2798                 return;
2799
2800         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
2801         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
2802         pango_layout_set_markup (layout, markup, -1);
2803         g_free (markup);
2804
2805         font_desc = pango_font_description_new ();
2806         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
2807         pango_layout_set_font_description (layout, font_desc);
2808
2809         gtk_paint_layout (GTK_WIDGET (view)->style,
2810                           view->layout.bin_window,
2811                           GTK_WIDGET_STATE (view),
2812                           FALSE,
2813                           page_area,
2814                           GTK_WIDGET (view),
2815                           NULL,
2816                           page_area->x + 15,
2817                           page_area->y + 15,
2818                           layout);
2819
2820         pango_font_description_free (font_desc);
2821         g_object_unref (layout);
2822 }
2823
2824 static gboolean
2825 ev_view_expose_event (GtkWidget      *widget,
2826                       GdkEventExpose *event)
2827 {
2828         EvView  *view = EV_VIEW (widget);
2829         cairo_t *cr;
2830         gint     i;
2831
2832         if (view->animation) {
2833                 if (ev_transition_animation_ready (view->animation)) {
2834                         GdkRectangle page_area;
2835                         GtkBorder    border;
2836
2837                         if (get_page_extents (view, view->current_page, &page_area, &border)) {
2838                                 cr = gdk_cairo_create (view->layout.bin_window);
2839
2840                                 /* normalize to x=0, y=0 */
2841                                 cairo_translate (cr, page_area.x, page_area.y);
2842                                 page_area.x = page_area.y = 0;
2843
2844                                 ev_transition_animation_paint (view->animation, cr, page_area);
2845                                 cairo_destroy (cr);
2846                         }
2847                 }
2848
2849                 return TRUE;
2850         }
2851
2852         if (view->presentation) {
2853                 switch (view->presentation_state) {
2854                         case EV_PRESENTATION_END: {
2855                                 GdkRectangle area = {0};
2856
2857                                 area.width = widget->allocation.width;
2858                                 area.height = widget->allocation.height;
2859
2860                                 draw_end_presentation_page (view, &area);
2861                         }
2862                                 return FALSE;
2863                         case EV_PRESENTATION_BLACK:
2864                         case EV_PRESENTATION_WHITE:
2865                                 return FALSE;
2866                         case EV_PRESENTATION_NORMAL:
2867                         default:
2868                                 break;
2869                 }
2870         } else if (view->loading) {
2871                 GdkRectangle area = {0};
2872
2873                 area.width = widget->allocation.width;
2874                 area.height = widget->allocation.height;
2875
2876                 draw_loading_text (view,
2877                                    &area,
2878                                    &(event->area));
2879         }
2880
2881         if (view->document == NULL)
2882                 return FALSE;
2883
2884         cr = gdk_cairo_create (view->layout.bin_window);
2885
2886         for (i = view->start_page; i <= view->end_page; i++) {
2887                 GdkRectangle page_area;
2888                 GtkBorder border;
2889                 gboolean page_ready = TRUE;
2890
2891                 if (!get_page_extents (view, i, &page_area, &border))
2892                         continue;
2893
2894                 page_area.x -= view->scroll_x;
2895                 page_area.y -= view->scroll_y;
2896
2897                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
2898
2899                 if (page_ready && view->find_pages && view->highlight_find_results)
2900                         highlight_find_results (view, i);
2901                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2902                         show_annotation_windows (view, i);
2903         }
2904
2905         cairo_destroy (cr);
2906
2907         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
2908                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
2909
2910         return FALSE;
2911 }
2912
2913 static gboolean
2914 ev_view_do_popup_menu (EvView *view,
2915                        gdouble x,
2916                        gdouble y)
2917 {
2918         EvLink  *link;
2919         EvImage *image;
2920
2921         image = ev_view_get_image_at_location (view, x, y);
2922         if (image) {
2923                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
2924                 return TRUE;
2925         }
2926
2927         link = ev_view_get_link_at_location (view, x, y);
2928         if (link) {
2929                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
2930                 return TRUE;
2931         }
2932
2933         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
2934
2935         return TRUE;
2936 }
2937
2938 static gboolean
2939 ev_view_popup_menu (GtkWidget *widget)
2940 {
2941         gint x, y;
2942
2943         gtk_widget_get_pointer (widget, &x, &y);
2944         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
2945 }
2946
2947 static void
2948 get_link_area (EvView       *view,
2949                gint          x,
2950                gint          y,
2951                EvLink       *link,
2952                GdkRectangle *area)
2953 {
2954         EvRectangle  ev_rect;
2955         GList       *link_mapping;
2956         gint         page;
2957         gint         x_offset = 0, y_offset = 0;
2958
2959         x += view->scroll_x;
2960         y += view->scroll_y;
2961
2962         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
2963
2964         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
2965         ev_link_mapping_get_area (link_mapping, link, &ev_rect);
2966
2967         doc_rect_to_view_rect (view, page, &ev_rect, area);
2968         area->y -= view->scroll_y;
2969 }
2970
2971 static void
2972 get_annot_area (EvView       *view,
2973                gint          x,
2974                gint          y,
2975                EvAnnotation *annot,
2976                GdkRectangle *area)
2977 {
2978         EvRectangle  ev_rect;
2979         GList       *annots_mapping;
2980         gint         page;
2981         gint         x_offset = 0, y_offset = 0;
2982
2983         x += view->scroll_x;
2984         y += view->scroll_y;
2985
2986         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
2987
2988         annots_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2989         ev_annotation_mapping_get_area (annots_mapping, annot, &ev_rect);
2990
2991         doc_rect_to_view_rect (view, page, &ev_rect, area);
2992         area->y -= view->scroll_y;
2993 }
2994
2995 static gboolean
2996 ev_view_query_tooltip (GtkWidget  *widget,
2997                        gint        x,
2998                        gint        y,
2999                        gboolean    keyboard_tip,
3000                        GtkTooltip *tooltip)
3001 {
3002         EvView       *view = EV_VIEW (widget);
3003         EvLink       *link;
3004         EvAnnotation *annot;
3005         gchar        *text;
3006
3007         annot = ev_view_get_annotation_at_location (view, x, y);
3008         if (annot && annot->contents) {
3009                 GdkRectangle annot_area;
3010
3011                 get_annot_area (view, x, y, annot, &annot_area);
3012                 gtk_tooltip_set_text (tooltip, annot->contents);
3013                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
3014
3015                 return TRUE;
3016         }
3017
3018         link = ev_view_get_link_at_location (view, x, y);
3019         if (!link)
3020                 return FALSE;
3021
3022         text = tip_from_link (view, link);
3023         if (text && g_utf8_validate (text, -1, NULL)) {
3024                 GdkRectangle link_area;
3025
3026                 get_link_area (view, x, y, link, &link_area);
3027                 gtk_tooltip_set_text (tooltip, text);
3028                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3029         }
3030         g_free (text);
3031
3032         return TRUE;
3033 }
3034
3035 static void
3036 start_selection_for_event (EvView         *view,
3037                            GdkEventButton *event)
3038 {
3039         EvSelectionStyle style;
3040
3041         clear_selection (view);
3042
3043         view->selection_info.start.x = event->x + view->scroll_x;
3044         view->selection_info.start.y = event->y + view->scroll_y;
3045
3046         switch (event->type) {
3047                 case GDK_2BUTTON_PRESS:
3048                         style = EV_SELECTION_STYLE_WORD;
3049                         break;
3050                 case GDK_3BUTTON_PRESS:
3051                         style = EV_SELECTION_STYLE_LINE;
3052                         break;
3053                 default:
3054                         style = EV_SELECTION_STYLE_GLYPH;
3055                         break;
3056         }
3057
3058         view->selection_info.style = style;
3059 }
3060
3061 static gboolean
3062 ev_view_button_press_event (GtkWidget      *widget,
3063                             GdkEventButton *event)
3064 {
3065         EvView *view = EV_VIEW (widget);
3066
3067         if (!view->document)
3068                 return FALSE;
3069
3070         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3071                 gtk_widget_grab_focus (widget);
3072         }
3073
3074         if (view->window_child_focus) {
3075                 EvAnnotationWindow *window;
3076                 EvAnnotation       *annot;
3077
3078                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3079                 annot = ev_annotation_window_get_annotation (window);
3080                 ev_annotation_window_ungrab_focus (window);
3081                 ev_view_annotation_save (view, annot);
3082                 view->window_child_focus = NULL;
3083         }
3084
3085         view->pressed_button = event->button;
3086         view->selection_info.in_drag = FALSE;
3087
3088         if (view->scroll_info.autoscrolling)
3089                 return TRUE;
3090
3091         switch (event->button) {
3092                 case 1: {
3093                         EvImage *image;
3094                         EvAnnotation *annot;
3095                         EvFormField *field;
3096
3097                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3098                                 if (event->type == GDK_3BUTTON_PRESS) {
3099                                         start_selection_for_event (view, event);
3100                                 } else if (location_in_selected_text (view,
3101                                                                event->x + view->scroll_x,
3102                                                                event->y + view->scroll_y)) {
3103                                         view->selection_info.in_drag = TRUE;
3104                                 } else {
3105                                         start_selection_for_event (view, event);
3106                                 }
3107
3108                                 gtk_widget_queue_draw (widget);
3109                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3110                                 ev_view_handle_annotation (view, annot, event->x, event->y);
3111                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3112                                 ev_view_remove_all (view);
3113                                 ev_view_handle_form_field (view, field, event->x, event->y);
3114                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3115                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3116                                 if (view->image_dnd_info.image)
3117                                         g_object_unref (view->image_dnd_info.image);
3118                                 view->image_dnd_info.image = g_object_ref (image);
3119                                 view->image_dnd_info.in_drag = TRUE;
3120
3121                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3122                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3123                         } else {
3124                                 ev_view_remove_all (view);
3125
3126                                 if (EV_IS_SELECTION (view->document))
3127                                         start_selection_for_event (view, event);
3128                         }
3129                 }
3130                         return TRUE;
3131                 case 2:
3132                         /* use root coordinates as reference point because
3133                          * scrolling changes window relative coordinates */
3134                         view->drag_info.start.x = event->x_root;
3135                         view->drag_info.start.y = event->y_root;
3136                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3137                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3138
3139                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3140
3141                         return TRUE;
3142                 case 3:
3143                         view->scroll_info.start_y = event->y;
3144                         return ev_view_do_popup_menu (view, event->x, event->y);
3145         }
3146
3147         return FALSE;
3148 }
3149
3150 static void
3151 ev_view_remove_all (EvView *view)
3152 {
3153         GList *children, *child;
3154
3155         children = gtk_container_get_children (GTK_CONTAINER (view));
3156         for (child = children; child && child->data; child = g_list_next (child)) {
3157                 gtk_container_remove (GTK_CONTAINER (view),
3158                                       GTK_WIDGET (child->data));
3159         }
3160         g_list_free (children);
3161 }
3162
3163 /*** Drag and Drop ***/
3164 static void
3165 ev_view_drag_data_get (GtkWidget        *widget,
3166                        GdkDragContext   *context,
3167                        GtkSelectionData *selection_data,
3168                        guint             info,
3169                        guint             time)
3170 {
3171         EvView *view = EV_VIEW (widget);
3172
3173         switch (info) {
3174                 case TARGET_DND_TEXT:
3175                         if (EV_IS_SELECTION (view->document) &&
3176                             view->selection_info.selections) {
3177                                 gchar *text;
3178
3179                                 text = get_selected_text (view);
3180                                 gtk_selection_data_set_text (selection_data,
3181                                                              text,
3182                                                              strlen (text));
3183                                 g_free (text);
3184                         }
3185                         break;
3186                 case TARGET_DND_IMAGE:
3187                         if (view->image_dnd_info.image) {
3188                                 GdkPixbuf *pixbuf;
3189
3190                                 ev_document_doc_mutex_lock ();
3191                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3192                                                                        view->image_dnd_info.image);
3193                                 ev_document_doc_mutex_unlock ();
3194
3195                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3196                                 g_object_unref (pixbuf);
3197                         }
3198                         break;
3199                 case TARGET_DND_URI:
3200                         if (view->image_dnd_info.image) {
3201                                 GdkPixbuf   *pixbuf;
3202                                 const gchar *tmp_uri;
3203                                 gchar       *uris[2];
3204
3205                                 ev_document_doc_mutex_lock ();
3206                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3207                                                                        view->image_dnd_info.image);
3208                                 ev_document_doc_mutex_unlock ();
3209
3210                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3211                                 g_object_unref (pixbuf);
3212
3213                                 uris[0] = (gchar *)tmp_uri;
3214                                 uris[1] = NULL;
3215                                 gtk_selection_data_set_uris (selection_data, uris);
3216                         }
3217         }
3218 }
3219
3220 static gboolean
3221 ev_view_drag_motion (GtkWidget      *widget,
3222                      GdkDragContext *context,
3223                      gint            x,
3224                      gint            y,
3225                      guint           time)
3226 {
3227         if (gtk_drag_get_source_widget (context) == widget)
3228                 gdk_drag_status (context, 0, time);
3229         else
3230                 gdk_drag_status (context, context->suggested_action, time);
3231
3232         return TRUE;
3233 }
3234
3235 static gboolean
3236 selection_update_idle_cb (EvView *view)
3237 {
3238         compute_selections (view,
3239                             view->selection_info.style,
3240                             &view->selection_info.start,
3241                             &view->motion);
3242         view->selection_update_id = 0;
3243         return FALSE;
3244 }
3245
3246 static gboolean
3247 selection_scroll_timeout_cb (EvView *view)
3248 {
3249         gint x, y, shift = 0;
3250         GtkWidget *widget = GTK_WIDGET (view);
3251
3252         gtk_widget_get_pointer (widget, &x, &y);
3253
3254         if (y > widget->allocation.height) {
3255                 shift = (y - widget->allocation.height) / 2;
3256         } else if (y < 0) {
3257                 shift = y / 2;
3258         }
3259
3260         if (shift)
3261                 gtk_adjustment_set_value (view->vadjustment,
3262                                           CLAMP (view->vadjustment->value + shift,
3263                                           view->vadjustment->lower,
3264                                           view->vadjustment->upper -
3265                                           view->vadjustment->page_size));
3266
3267         if (x > widget->allocation.width) {
3268                 shift = (x - widget->allocation.width) / 2;
3269         } else if (x < 0) {
3270                 shift = x / 2;
3271         }
3272
3273         if (shift)
3274                 gtk_adjustment_set_value (view->hadjustment,
3275                                           CLAMP (view->hadjustment->value + shift,
3276                                           view->hadjustment->lower,
3277                                           view->hadjustment->upper -
3278                                           view->hadjustment->page_size));
3279
3280         return TRUE;
3281 }
3282
3283 static gboolean
3284 ev_view_drag_update_momentum (EvView *view)
3285 {
3286         int i;
3287         if (!view->drag_info.in_drag)
3288                 return FALSE;
3289
3290         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3291                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3292                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3293         }
3294
3295         /* Momentum is a moving average of 10ms granularity over
3296          * the last 100ms with each 10ms stored in buffer.
3297          */
3298
3299         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3300         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3301
3302         return TRUE;
3303 }
3304
3305 static gboolean
3306 ev_view_scroll_drag_release (EvView *view)
3307 {
3308         gdouble dhadj_value, dvadj_value;
3309         gdouble oldhadjustment, oldvadjustment;
3310
3311         view->drag_info.momentum.x /= 1.2;
3312         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3313
3314         dhadj_value = view->hadjustment->page_size *
3315                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
3316         dvadj_value = view->vadjustment->page_size *
3317                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
3318
3319         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3320         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3321
3322      /* When we reach the edges, we need either to absorb some momentum and bounce by
3323       * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3324      if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
3325            ((oldhadjustment + dhadj_value) < 0))
3326                 view->drag_info.momentum.x = 0;
3327         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
3328            ((oldvadjustment + dvadj_value) < 0))
3329                 view->drag_info.momentum.y = 0;
3330
3331         gtk_adjustment_set_value (view->hadjustment,
3332                                 MIN (oldhadjustment + dhadj_value,
3333                                 view->hadjustment->upper - view->hadjustment->page_size));
3334         gtk_adjustment_set_value (view->vadjustment,
3335                                 MIN (oldvadjustment + dvadj_value,
3336                                 view->vadjustment->upper - view->vadjustment->page_size));
3337
3338         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3339            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3340                 return FALSE;
3341         else
3342                 return TRUE;
3343 }
3344
3345 static gboolean
3346 ev_view_motion_notify_event (GtkWidget      *widget,
3347                              GdkEventMotion *event)
3348 {
3349         EvView *view = EV_VIEW (widget);
3350         gint x, y;
3351
3352         if (!view->document)
3353                 return FALSE;
3354
3355
3356         if (event->is_hint || event->window != view->layout.bin_window) {
3357             gtk_widget_get_pointer (widget, &x, &y);
3358         } else {
3359             x = event->x;
3360             y = event->y;
3361         }
3362
3363         if (view->scroll_info.autoscrolling) {
3364                 view->scroll_info.last_y = y;
3365                 return TRUE;
3366         }
3367
3368         if (view->selection_info.in_drag) {
3369                 if (gtk_drag_check_threshold (widget,
3370                                               view->selection_info.start.x,
3371                                               view->selection_info.start.y,
3372                                               x, y)) {
3373                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3374
3375                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3376
3377                         gtk_drag_begin (widget, target_list,
3378                                         GDK_ACTION_COPY,
3379                                         1, (GdkEvent *)event);
3380
3381                         view->selection_info.in_drag = FALSE;
3382
3383                         gtk_target_list_unref (target_list);
3384
3385                         return TRUE;
3386                 }
3387         } else if (view->image_dnd_info.in_drag) {
3388                 if (gtk_drag_check_threshold (widget,
3389                                               view->selection_info.start.x,
3390                                               view->selection_info.start.y,
3391                                               x, y)) {
3392                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3393
3394                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3395                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3396
3397                         gtk_drag_begin (widget, target_list,
3398                                         GDK_ACTION_COPY,
3399                                         1, (GdkEvent *)event);
3400
3401                         view->image_dnd_info.in_drag = FALSE;
3402
3403                         gtk_target_list_unref (target_list);
3404
3405                         return TRUE;
3406                 }
3407         }
3408
3409         switch (view->pressed_button) {
3410         case 1:
3411                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3412                  * documents only.
3413                  */
3414                 if (view->rotation != 0)
3415                         return FALSE;
3416
3417                 /* Schedule timeout to scroll during selection and additionally
3418                  * scroll once to allow arbitrary speed. */
3419                 if (!view->selection_scroll_id)
3420                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3421                                                                (GSourceFunc)selection_scroll_timeout_cb,
3422                                                                view);
3423                 else
3424                     selection_scroll_timeout_cb (view);
3425
3426                 view->selection_info.in_selection = TRUE;
3427                 view->motion.x = x + view->scroll_x;
3428                 view->motion.y = y + view->scroll_y;
3429
3430                 /* Queue an idle to handle the motion.  We do this because
3431                  * handling any selection events in the motion could be slower
3432                  * than new motion events reach us.  We always put it in the
3433                  * idle to make sure we catch up and don't visibly lag the
3434                  * mouse. */
3435                 if (!view->selection_update_id)
3436                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3437
3438                 return TRUE;
3439         case 2:
3440                 if (!view->drag_info.in_drag) {
3441                         gboolean start;
3442                         int i;
3443
3444                         start = gtk_drag_check_threshold (widget,
3445                                                           view->drag_info.start.x,
3446                                                           view->drag_info.start.y,
3447                                                           event->x_root,
3448                                                           event->y_root);
3449                         view->drag_info.in_drag = start;
3450                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3451                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3452                         /* Set 100 to choose how long it takes to build up momentum */
3453                         /* Clear out previous momentum info: */
3454                         for (i = 0; i < DRAG_HISTORY; i++) {
3455                                 view->drag_info.buffer[i].x = event->x;
3456                                 view->drag_info.buffer[i].y = event->y;
3457                         }
3458                         view->drag_info.momentum.x = 0;
3459                         view->drag_info.momentum.y = 0;
3460                 }
3461
3462                 if (view->drag_info.in_drag) {
3463                         int dx, dy;
3464                         gdouble dhadj_value, dvadj_value;
3465
3466                         view->drag_info.buffer[0].x = event->x;
3467                         view->drag_info.buffer[0].y = event->y;
3468
3469                         dx = event->x_root - view->drag_info.start.x;
3470                         dy = event->y_root - view->drag_info.start.y;
3471
3472                         dhadj_value = view->hadjustment->page_size *
3473                                       (gdouble)dx / widget->allocation.width;
3474                         dvadj_value = view->vadjustment->page_size *
3475                                       (gdouble)dy / widget->allocation.height;
3476
3477                         /* clamp scrolling to visible area */
3478                         gtk_adjustment_set_value (view->hadjustment,
3479                                                   MIN(view->drag_info.hadj - dhadj_value,
3480                                                       view->hadjustment->upper -
3481                                                       view->hadjustment->page_size));
3482                         gtk_adjustment_set_value (view->vadjustment,
3483                                                   MIN(view->drag_info.vadj - dvadj_value,
3484                                                       view->vadjustment->upper -
3485                                                       view->vadjustment->page_size));
3486
3487                         return TRUE;
3488                 }
3489
3490                 break;
3491         default:
3492                 ev_view_handle_cursor_over_xy (view, x, y);
3493         }
3494
3495         return FALSE;
3496 }
3497
3498 static gboolean
3499 ev_view_button_release_event (GtkWidget      *widget,
3500                               GdkEventButton *event)
3501 {
3502         EvView *view = EV_VIEW (widget);
3503         EvLink *link = NULL;
3504
3505         view->image_dnd_info.in_drag = FALSE;
3506
3507         if (view->scroll_info.autoscrolling) {
3508                 ev_view_autoscroll_stop (view);
3509                 view->pressed_button = -1;
3510
3511                 return TRUE;
3512         }
3513
3514         if (view->drag_info.in_drag) {
3515                 view->drag_info.release_timeout_id =
3516                         g_timeout_add (20,
3517                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3518         }
3519
3520         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3521                 link = ev_view_get_link_at_location (view, event->x, event->y);
3522         }
3523
3524         view->drag_info.in_drag = FALSE;
3525
3526         if (view->pressed_button == 2) {
3527                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3528         }
3529
3530         view->pressed_button = -1;
3531
3532         if (view->selection_scroll_id) {
3533             g_source_remove (view->selection_scroll_id);
3534             view->selection_scroll_id = 0;
3535         }
3536         if (view->selection_update_id) {
3537             g_source_remove (view->selection_update_id);
3538             view->selection_update_id = 0;
3539         }
3540
3541         if (!view->selection_info.in_selection &&
3542             view->selection_info.style != EV_SELECTION_STYLE_GLYPH) {
3543                 compute_selections (view,
3544                                     view->selection_info.style,
3545                                     &(view->selection_info.start),
3546                                     &(view->selection_info.start));
3547         }
3548
3549         if (view->selection_info.selections) {
3550                 clear_link_selected (view);
3551                 ev_view_update_primary_selection (view);
3552
3553                 if (view->selection_info.in_drag) {
3554                         clear_selection (view);
3555                         gtk_widget_queue_draw (widget);
3556                 }
3557
3558                 view->selection_info.in_drag = FALSE;
3559         } else if (link) {
3560                 if (event->button == 2) {
3561                         EvLinkAction    *action;
3562                         EvLinkActionType type;
3563
3564                         action = ev_link_get_action (link);
3565                         if (!action)
3566                                 return FALSE;
3567
3568                         type = ev_link_action_get_action_type (action);
3569                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3570                                 g_signal_emit (view,
3571                                                signals[SIGNAL_EXTERNAL_LINK],
3572                                                0, action);
3573                         }
3574                 } else {
3575                         ev_view_handle_link (view, link);
3576                 }
3577         } else if (view->presentation) {
3578                 switch (event->button) {
3579                         case 1:
3580                                 ev_view_next_page (view);
3581                                 return TRUE;
3582                         case 3:
3583                                 ev_view_previous_page (view);
3584                                 return TRUE;
3585                 }
3586         }
3587
3588         return FALSE;
3589 }
3590
3591 /* Goto Window */
3592 /* Cut and paste from gtkwindow.c */
3593 static void
3594 send_focus_change (GtkWidget *widget,
3595                    gboolean   in)
3596 {
3597         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3598
3599         g_object_ref (widget);
3600
3601         if (in)
3602                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3603         else
3604                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3605
3606         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3607         fevent->focus_change.window = g_object_ref (widget->window);
3608         fevent->focus_change.in = in;
3609
3610         gtk_widget_event (widget, fevent);
3611
3612         g_object_notify (G_OBJECT (widget), "has-focus");
3613
3614         g_object_unref (widget);
3615         gdk_event_free (fevent);
3616 }
3617
3618 static void
3619 ev_view_goto_window_hide (EvView *view)
3620 {
3621         /* send focus-in event */
3622         send_focus_change (view->goto_entry, FALSE);
3623         gtk_widget_hide (view->goto_window);
3624         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3625 }
3626
3627 static gboolean
3628 ev_view_goto_window_delete_event (GtkWidget   *widget,
3629                                   GdkEventAny *event,
3630                                   EvView      *view)
3631 {
3632         ev_view_goto_window_hide (view);
3633
3634         return TRUE;
3635 }
3636
3637 static gboolean
3638 key_is_numeric (guint keyval)
3639 {
3640         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3641                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3642 }
3643
3644 static gboolean
3645 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3646                                      GdkEventKey *event,
3647                                      EvView      *view)
3648 {
3649         switch (event->keyval) {
3650                 case GDK_Escape:
3651                 case GDK_Tab:
3652                 case GDK_KP_Tab:
3653                 case GDK_ISO_Left_Tab:
3654                         ev_view_goto_window_hide (view);
3655                         return TRUE;
3656                 case GDK_Return:
3657                 case GDK_KP_Enter:
3658                 case GDK_ISO_Enter:
3659                 case GDK_BackSpace:
3660                 case GDK_Delete:
3661                         return FALSE;
3662                 default:
3663                         if (!key_is_numeric (event->keyval))
3664                                 return TRUE;
3665         }
3666
3667         return FALSE;
3668 }
3669
3670 static gboolean
3671 ev_view_goto_window_button_press_event (GtkWidget      *widget,
3672                                         GdkEventButton *event,
3673                                         EvView         *view)
3674 {
3675         ev_view_goto_window_hide (view);
3676
3677         return TRUE;
3678 }
3679
3680 static void
3681 ev_view_goto_entry_activate (GtkEntry *entry,
3682                              EvView   *view)
3683 {
3684         const gchar *text;
3685         gint         page;
3686
3687         text = gtk_entry_get_text (entry);
3688         page = atoi (text) - 1;
3689
3690         ev_view_goto_window_hide (view);
3691
3692         if (page >= 0 &&
3693             page < ev_page_cache_get_n_pages (view->page_cache))
3694                 ev_page_cache_set_current_page (view->page_cache, page);
3695 }
3696
3697 static void
3698 ev_view_goto_window_create (EvView *view)
3699 {
3700         GtkWidget *frame, *hbox, *toplevel, *label;
3701
3702         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
3703
3704         if (view->goto_window) {
3705                 if (GTK_WINDOW (toplevel)->group)
3706                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3707                                                      GTK_WINDOW (view->goto_window));
3708                 else if (GTK_WINDOW (view->goto_window)->group)
3709                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
3710                                                         GTK_WINDOW (view->goto_window));
3711                 return;
3712         }
3713
3714         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
3715         gtk_window_set_screen (GTK_WINDOW (view->goto_window),
3716                                gtk_widget_get_screen (GTK_WIDGET (view)));
3717
3718         if (GTK_WINDOW (toplevel)->group)
3719                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3720                                              GTK_WINDOW (view->goto_window));
3721
3722         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
3723
3724         g_signal_connect (view->goto_window, "delete_event",
3725                           G_CALLBACK (ev_view_goto_window_delete_event),
3726                           view);
3727         g_signal_connect (view->goto_window, "key_press_event",
3728                           G_CALLBACK (ev_view_goto_window_key_press_event),
3729                           view);
3730         g_signal_connect (view->goto_window, "button_press_event",
3731                           G_CALLBACK (ev_view_goto_window_button_press_event),
3732                           view);
3733
3734         frame = gtk_frame_new (NULL);
3735         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
3736         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
3737         gtk_widget_show (frame);
3738
3739         hbox = gtk_hbox_new (FALSE, 0);
3740         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
3741         gtk_container_add (GTK_CONTAINER (frame), hbox);
3742         gtk_widget_show (hbox);
3743
3744         label = gtk_label_new(_("Jump to page:"));
3745         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
3746         gtk_widget_show (label);
3747         gtk_widget_realize (label);
3748
3749         view->goto_entry = gtk_entry_new ();
3750         g_signal_connect (view->goto_entry, "activate",
3751                           G_CALLBACK (ev_view_goto_entry_activate),
3752                           view);
3753         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
3754         gtk_widget_show (view->goto_entry);
3755         gtk_widget_realize (view->goto_entry);
3756 }
3757
3758 static void
3759 ev_view_goto_entry_grab_focus (EvView *view)
3760 {
3761         GtkWidgetClass *entry_parent_class;
3762
3763         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
3764         (entry_parent_class->grab_focus) (view->goto_entry);
3765
3766         send_focus_change (view->goto_entry, TRUE);
3767 }
3768
3769 static void
3770 ev_view_goto_window_send_key_event (EvView   *view,
3771                                     GdkEvent *event)
3772 {
3773         GdkEventKey *new_event;
3774         GdkScreen   *screen;
3775
3776         /* Move goto window off screen */
3777         screen = gtk_widget_get_screen (GTK_WIDGET (view));
3778         gtk_window_move (GTK_WINDOW (view->goto_window),
3779                          gdk_screen_get_width (screen) + 1,
3780                          gdk_screen_get_height (screen) + 1);
3781         gtk_widget_show (view->goto_window);
3782
3783         new_event = (GdkEventKey *) gdk_event_copy (event);
3784         g_object_unref (new_event->window);
3785         new_event->window = g_object_ref (view->goto_window->window);
3786         gtk_widget_realize (view->goto_window);
3787
3788         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
3789         gdk_event_free ((GdkEvent *)new_event);
3790         gtk_widget_hide (view->goto_window);
3791 }
3792
3793 static gboolean
3794 ev_view_key_press_event (GtkWidget   *widget,
3795                          GdkEventKey *event)
3796 {
3797         EvView *view = EV_VIEW (widget);
3798         EvPresentationState current;
3799
3800         if (!view->document)
3801                 return FALSE;
3802
3803         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3804                 /* Forward key events to current focused window child */
3805                 if (view->window_child_focus) {
3806                         GdkEventKey *new_event;
3807                         gboolean     handled;
3808
3809                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
3810                         g_object_unref (new_event->window);
3811                         new_event->window = g_object_ref (view->window_child_focus->window->window);
3812                         gtk_widget_realize (view->window_child_focus->window);
3813                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
3814                         gdk_event_free ((GdkEvent *)new_event);
3815
3816                         return handled;
3817                 }
3818
3819                 return FALSE;
3820         }
3821
3822         if (!view->presentation ||
3823             view->presentation_state == EV_PRESENTATION_END)
3824                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3825
3826
3827         current = view->presentation_state;
3828
3829         switch (event->keyval) {
3830                 case GDK_b:
3831                 case GDK_B:
3832                 case GDK_period:
3833                 case GDK_KP_Decimal:
3834                         view->presentation_state =
3835                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
3836                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
3837                         break;
3838                 case GDK_w:
3839                 case GDK_W:
3840                         view->presentation_state =
3841                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
3842                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
3843                         break;
3844                 default:
3845                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
3846                             view->presentation_state == EV_PRESENTATION_WHITE) {
3847                                 view->presentation_state = EV_PRESENTATION_NORMAL;
3848                         }
3849         }
3850
3851         if (current == view->presentation_state) {
3852                 if (ev_page_cache_get_n_pages (view->page_cache) > 1 &&
3853                     key_is_numeric (event->keyval)) {
3854                         gint x, y;
3855
3856                         ev_view_goto_window_create (view);
3857                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
3858                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
3859                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
3860                         gtk_widget_show (view->goto_window);
3861                         ev_view_goto_entry_grab_focus (view);
3862
3863                         return TRUE;
3864                 }
3865
3866                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3867         }
3868
3869         switch (view->presentation_state) {
3870                 case EV_PRESENTATION_NORMAL:
3871                 case EV_PRESENTATION_BLACK:
3872                         gdk_window_set_background (view->layout.bin_window,
3873                                                    &widget->style->black);
3874                         break;
3875                 case EV_PRESENTATION_WHITE:
3876                         gdk_window_set_background (view->layout.bin_window,
3877                                                    &widget->style->white);
3878                         break;
3879                 default:
3880                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3881         }
3882
3883         gtk_widget_queue_draw (widget);
3884         return TRUE;
3885 }
3886
3887 static gint
3888 ev_view_focus_in (GtkWidget     *widget,
3889                   GdkEventFocus *event)
3890 {
3891         if (EV_VIEW (widget)->pixbuf_cache)
3892                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3893         gtk_widget_queue_draw (widget);
3894
3895         return FALSE;
3896 }
3897
3898 static gint
3899 ev_view_focus_out (GtkWidget     *widget,
3900                      GdkEventFocus *event)
3901 {
3902         if (EV_VIEW (widget)->goto_window)
3903                 ev_view_goto_window_hide (EV_VIEW (widget));
3904
3905         if (EV_VIEW (widget)->pixbuf_cache)
3906                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3907         gtk_widget_queue_draw (widget);
3908
3909         return FALSE;
3910 }
3911
3912 static gboolean
3913 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3914 {
3915         EvView *view = EV_VIEW (widget);
3916
3917         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
3918                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3919
3920         return FALSE;
3921 }
3922
3923 static gboolean
3924 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3925 {
3926         EvView *view = EV_VIEW (widget);
3927
3928         ev_view_handle_cursor_over_xy (view, event->x, event->y);
3929
3930         return FALSE;
3931 }
3932
3933 static void
3934 ev_view_style_set (GtkWidget *widget,
3935                    GtkStyle  *old_style)
3936 {
3937         if (EV_VIEW (widget)->pixbuf_cache)
3938                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3939
3940         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
3941 }
3942
3943 /*** Drawing ***/
3944
3945 static guint32
3946 ev_gdk_color_to_rgb (const GdkColor *color)
3947 {
3948   guint32 result;
3949   result = (0xff0000 | (color->red & 0xff00));
3950   result <<= 8;
3951   result |= ((color->green & 0xff00) | (color->blue >> 8));
3952   return result;
3953 }
3954
3955 static void
3956 draw_rubberband (GtkWidget *widget, GdkWindow *window,
3957                  const GdkRectangle *rect, guchar alpha)
3958 {
3959         GdkGC *gc;
3960         GdkPixbuf *pixbuf;
3961         GdkColor *fill_color_gdk;
3962         guint fill_color;
3963
3964         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
3965         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
3966
3967         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
3968                                  rect->width, rect->height);
3969         gdk_pixbuf_fill (pixbuf, fill_color);
3970
3971         gdk_draw_pixbuf (window, NULL, pixbuf,
3972                          0, 0,
3973                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3974                          rect->width, rect->height,
3975                          GDK_RGB_DITHER_NONE,
3976                          0, 0);
3977
3978         g_object_unref (pixbuf);
3979
3980         gc = gdk_gc_new (window);
3981         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
3982         gdk_draw_rectangle (window, gc, FALSE,
3983                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3984                             rect->width - 1,
3985                             rect->height - 1);
3986         g_object_unref (gc);
3987
3988         gdk_color_free (fill_color_gdk);
3989 }
3990
3991
3992 static void
3993 highlight_find_results (EvView *view, int page)
3994 {
3995         gint i, n_results = 0;
3996
3997         n_results = ev_view_find_get_n_results (view, page);
3998
3999         for (i = 0; i < n_results; i++) {
4000                 EvRectangle *rectangle;
4001                 GdkRectangle view_rectangle;
4002                 guchar alpha;
4003
4004                 if (i == view->find_result && page == view->current_page) {
4005                         alpha = 0x90;
4006                 } else {
4007                         alpha = 0x20;
4008                 }
4009
4010                 rectangle = ev_view_find_get_result (view, page, i);
4011                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4012                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
4013                                  &view_rectangle, alpha);
4014         }
4015 }
4016
4017 static void
4018 draw_loading_text (EvView       *view,
4019                    GdkRectangle *page_area,
4020                    GdkRectangle *expose_area)
4021 {
4022         cairo_t *cr;
4023         gint     width, height;
4024
4025         if (!view->loading_text) {
4026                 const gchar *loading_text = _("Loading...");
4027                 PangoLayout *layout;
4028                 PangoFontDescription *font_desc;
4029                 PangoRectangle logical_rect;
4030                 gint target_width;
4031                 gdouble real_scale;
4032
4033                 ev_document_fc_mutex_lock ();
4034
4035                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
4036
4037                 font_desc = pango_font_description_new ();
4038
4039                 /* We set the font to be 10 points, get the size, and scale appropriately */
4040                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
4041                 pango_layout_set_font_description (layout, font_desc);
4042                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4043
4044                 target_width = MAX (page_area->width / 2, 1);
4045                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
4046                 pango_font_description_set_size (font_desc, (int)real_scale);
4047                 pango_layout_set_font_description (layout, font_desc);
4048                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4049
4050                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
4051                                                                  logical_rect.width,
4052                                                                  logical_rect.height);
4053                 cr = cairo_create (view->loading_text);
4054                 cairo_set_source_rgb (cr,
4055                                       155 / (double)255,
4056                                       155 / (double)255,
4057                                       155 / (double)255);
4058                 pango_cairo_show_layout (cr, layout);
4059                 cairo_destroy (cr);
4060
4061                 pango_font_description_free (font_desc);
4062                 g_object_unref (layout);
4063
4064                 ev_document_fc_mutex_unlock ();
4065         }
4066
4067         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
4068         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
4069
4070         cr = gdk_cairo_create (view->layout.bin_window);
4071         cairo_translate (cr,
4072                          page_area->x + width,
4073                          page_area->y + height);
4074         cairo_set_source_surface (cr, view->loading_text, 0, 0);
4075         cairo_paint (cr);
4076         cairo_destroy (cr);
4077 }
4078
4079 static void
4080 draw_one_page (EvView       *view,
4081                gint          page,
4082                cairo_t      *cr,
4083                GdkRectangle *page_area,
4084                GtkBorder    *border,
4085                GdkRectangle *expose_area,
4086                gboolean     *page_ready)
4087 {
4088         GdkRectangle overlap;
4089         GdkRectangle real_page_area;
4090
4091         g_assert (view->document);
4092
4093         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4094                 return;
4095
4096         /* Render the document itself */
4097         real_page_area = *page_area;
4098
4099         real_page_area.x += border->left;
4100         real_page_area.y += border->top;
4101         real_page_area.width -= (border->left + border->right);
4102         real_page_area.height -= (border->top + border->bottom);
4103         *page_ready = TRUE;
4104
4105         if (!view->presentation) {
4106                 gint current_page;
4107
4108                 current_page = ev_page_cache_get_current_page (view->page_cache);
4109                 ev_document_misc_paint_one_page (view->layout.bin_window,
4110                                                  GTK_WIDGET (view),
4111                                                  page_area, border,
4112                                                  page == current_page);
4113         }
4114
4115         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4116                 gint             width, height;
4117                 gint             page_width, page_height;
4118                 cairo_surface_t *page_surface = NULL;
4119                 gint             selection_width, selection_height;
4120                 cairo_surface_t *selection_surface = NULL;
4121
4122                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4123
4124                 if (!page_surface) {
4125                         if (!view->presentation) {
4126                                 draw_loading_text (view,
4127                                                    &real_page_area,
4128                                                    expose_area);
4129                         }
4130
4131                         *page_ready = FALSE;
4132
4133                         return;
4134                 }
4135
4136                 ev_page_cache_get_size (view->page_cache,
4137                                         page, view->rotation,
4138                                         view->scale,
4139                                         &width, &height);
4140
4141                 page_width = cairo_image_surface_get_width (page_surface);
4142                 page_height = cairo_image_surface_get_height (page_surface);
4143
4144                 cairo_save (cr);
4145                 cairo_translate (cr, overlap.x, overlap.y);
4146
4147                 if (width != page_width || height != page_height) {
4148                         cairo_pattern_set_filter (cairo_get_source (cr),
4149                                                   CAIRO_FILTER_FAST);
4150                         cairo_scale (cr,
4151                                      (gdouble)width / page_width,
4152                                      (gdouble)height / page_height);
4153                 }
4154
4155                 cairo_surface_set_device_offset (page_surface,
4156                                                  overlap.x - real_page_area.x,
4157                                                  overlap.y - real_page_area.y);
4158                 cairo_set_source_surface (cr, page_surface, 0, 0);
4159                 cairo_paint (cr);
4160                 cairo_restore (cr);
4161
4162                 /* Get the selection pixbuf iff we have something to draw */
4163                 if (find_selection_for_page (view, page) &&
4164                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4165                         selection_surface =
4166                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4167                                                                        page,
4168                                                                        view->scale,
4169                                                                        NULL);
4170                 }
4171
4172                 if (!selection_surface) {
4173                         return;
4174                 }
4175
4176                 selection_width = cairo_image_surface_get_width (selection_surface);
4177                 selection_height = cairo_image_surface_get_height (selection_surface);
4178
4179                 cairo_save (cr);
4180                 cairo_translate (cr, overlap.x, overlap.y);
4181
4182                 if (width != selection_width || height != selection_height) {
4183                         cairo_pattern_set_filter (cairo_get_source (cr),
4184                                                   CAIRO_FILTER_FAST);
4185                         cairo_scale (cr,
4186                                      (gdouble)width / selection_width,
4187                                      (gdouble)height / selection_height);
4188                 }
4189
4190                 cairo_surface_set_device_offset (selection_surface,
4191                                                  overlap.x - real_page_area.x,
4192                                                  overlap.y - real_page_area.y);
4193                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4194                 cairo_paint (cr);
4195                 cairo_restore (cr);
4196         }
4197 }
4198
4199 /*** GObject functions ***/
4200
4201 static void
4202 ev_view_finalize (GObject *object)
4203 {
4204         EvView *view = EV_VIEW (object);
4205
4206         clear_selection (view);
4207         clear_link_selected (view);
4208
4209         if (view->image_dnd_info.image)
4210                 g_object_unref (view->image_dnd_info.image);
4211         view->image_dnd_info.image = NULL;
4212
4213         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4214 }
4215
4216 static void
4217 ev_view_destroy (GtkObject *object)
4218 {
4219         EvView *view = EV_VIEW (object);
4220
4221         if (view->document) {
4222                 g_object_unref (view->document);
4223                 view->document = NULL;
4224         }
4225
4226         if (view->pixbuf_cache) {
4227                 g_object_unref (view->pixbuf_cache);
4228                 view->pixbuf_cache = NULL;
4229         }
4230
4231         if (view->goto_window) {
4232                 gtk_widget_destroy (view->goto_window);
4233                 view->goto_window = NULL;
4234                 view->goto_entry = NULL;
4235         }
4236
4237         ev_view_window_children_free (view);
4238
4239         if (view->selection_scroll_id) {
4240             g_source_remove (view->selection_scroll_id);
4241             view->selection_scroll_id = 0;
4242         }
4243
4244         if (view->selection_update_id) {
4245             g_source_remove (view->selection_update_id);
4246             view->selection_update_id = 0;
4247         }
4248
4249         if (view->loading_text) {
4250                 cairo_surface_destroy (view->loading_text);
4251                 view->loading_text = NULL;
4252         }
4253
4254         if (view->scroll_info.timeout_id) {
4255             g_source_remove (view->scroll_info.timeout_id);
4256             view->scroll_info.timeout_id = 0;
4257         }
4258
4259         if (view->drag_info.drag_timeout_id) {
4260                 g_source_remove (view->drag_info.drag_timeout_id);
4261                 view->drag_info.drag_timeout_id = 0;
4262         }
4263
4264         if (view->drag_info.release_timeout_id) {
4265                 g_source_remove (view->drag_info.release_timeout_id);
4266                 view->drag_info.release_timeout_id = 0;
4267         }
4268
4269         ev_view_presentation_transition_stop (view);
4270
4271         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4272
4273         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4274 }
4275
4276 static void
4277 ev_view_set_property (GObject      *object,
4278                       guint         prop_id,
4279                       const GValue *value,
4280                       GParamSpec   *pspec)
4281 {
4282         EvView *view = EV_VIEW (object);
4283
4284         switch (prop_id) {
4285                 case PROP_CONTINUOUS:
4286                         ev_view_set_continuous (view, g_value_get_boolean (value));
4287                         break;
4288                 case PROP_DUAL_PAGE:
4289                         ev_view_set_dual_page (view, g_value_get_boolean (value));
4290                         break;
4291                 case PROP_FULLSCREEN:
4292                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
4293                         break;
4294                 case PROP_PRESENTATION:
4295                         ev_view_set_presentation (view, g_value_get_boolean (value));
4296                         break;
4297                 case PROP_SIZING_MODE:
4298                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
4299                         break;
4300                 case PROP_ZOOM:
4301                         ev_view_set_zoom (view, g_value_get_double (value), FALSE);
4302                         break;
4303                 case PROP_ROTATION:
4304                         ev_view_set_rotation (view, g_value_get_int (value));
4305                         break;
4306                 default:
4307                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4308         }
4309 }
4310
4311 static AtkObject *
4312 ev_view_get_accessible (GtkWidget *widget)
4313 {
4314         static gboolean first_time = TRUE;
4315
4316         if (first_time) {
4317                 AtkObjectFactory *factory;
4318                 AtkRegistry *registry;
4319                 GType derived_type;
4320                 GType derived_atk_type;
4321
4322                 /*
4323                  * Figure out whether accessibility is enabled by looking at the
4324                  * type of the accessible object which would be created for
4325                  * the parent type of EvView.
4326                  */
4327                 derived_type = g_type_parent (EV_TYPE_VIEW);
4328
4329                 registry = atk_get_default_registry ();
4330                 factory = atk_registry_get_factory (registry,
4331                                                     derived_type);
4332                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4333                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4334                         atk_registry_set_factory_type (registry,
4335                                                        EV_TYPE_VIEW,
4336                                                        ev_view_accessible_factory_get_type ());
4337                 first_time = FALSE;
4338         }
4339         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4340 }
4341
4342 static void
4343 ev_view_get_property (GObject *object,
4344                       guint prop_id,
4345                       GValue *value,
4346                       GParamSpec *pspec)
4347 {
4348         EvView *view = EV_VIEW (object);
4349
4350         switch (prop_id) {
4351                 case PROP_CONTINUOUS:
4352                         g_value_set_boolean (value, view->continuous);
4353                         break;
4354                 case PROP_DUAL_PAGE:
4355                         g_value_set_boolean (value, view->dual_page);
4356                         break;
4357                 case PROP_FULLSCREEN:
4358                         g_value_set_boolean (value, view->fullscreen);
4359                         break;
4360                 case PROP_PRESENTATION:
4361                         g_value_set_boolean (value, view->presentation);
4362                         break;
4363                 case PROP_SIZING_MODE:
4364                         g_value_set_enum (value, view->sizing_mode);
4365                         break;
4366                 case PROP_ZOOM:
4367                         g_value_set_double (value, view->scale);
4368                         break;
4369                 case PROP_ROTATION:
4370                         g_value_set_int (value, view->rotation);
4371                         break;
4372                 case PROP_HAS_SELECTION:
4373                         g_value_set_boolean (value,
4374                                              view->selection_info.selections != NULL);
4375                         break;
4376                 default:
4377                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4378         }
4379 }
4380
4381 static void
4382 ev_view_class_init (EvViewClass *class)
4383 {
4384         GObjectClass *object_class = G_OBJECT_CLASS (class);
4385         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4386         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4387         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4388         GtkBindingSet *binding_set;
4389
4390         object_class->finalize = ev_view_finalize;
4391         object_class->set_property = ev_view_set_property;
4392         object_class->get_property = ev_view_get_property;
4393
4394         widget_class->expose_event = ev_view_expose_event;
4395         widget_class->button_press_event = ev_view_button_press_event;
4396         widget_class->motion_notify_event = ev_view_motion_notify_event;
4397         widget_class->button_release_event = ev_view_button_release_event;
4398         widget_class->key_press_event = ev_view_key_press_event;
4399         widget_class->focus_in_event = ev_view_focus_in;
4400         widget_class->focus_out_event = ev_view_focus_out;
4401         widget_class->get_accessible = ev_view_get_accessible;
4402         widget_class->size_request = ev_view_size_request;
4403         widget_class->size_allocate = ev_view_size_allocate;
4404         widget_class->realize = ev_view_realize;
4405         widget_class->scroll_event = ev_view_scroll_event;
4406         widget_class->enter_notify_event = ev_view_enter_notify_event;
4407         widget_class->leave_notify_event = ev_view_leave_notify_event;
4408         widget_class->style_set = ev_view_style_set;
4409         widget_class->drag_data_get = ev_view_drag_data_get;
4410         widget_class->drag_motion = ev_view_drag_motion;
4411         widget_class->popup_menu = ev_view_popup_menu;
4412         widget_class->query_tooltip = ev_view_query_tooltip;
4413
4414         gtk_object_class->destroy = ev_view_destroy;
4415
4416         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4417
4418         class->binding_activated = ev_view_scroll;
4419
4420         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4421                          G_TYPE_FROM_CLASS (object_class),
4422                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4423                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4424                          NULL, NULL,
4425                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4426                          G_TYPE_NONE, 2,
4427                          GTK_TYPE_SCROLL_TYPE,
4428                          G_TYPE_BOOLEAN);
4429
4430         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
4431                          G_TYPE_FROM_CLASS (object_class),
4432                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4433                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
4434                          NULL, NULL,
4435                          g_cclosure_marshal_VOID__VOID,
4436                          G_TYPE_NONE, 0, G_TYPE_NONE);
4437         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4438                          G_TYPE_FROM_CLASS (object_class),
4439                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4440                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4441                          NULL, NULL,
4442                          g_cclosure_marshal_VOID__OBJECT,
4443                          G_TYPE_NONE, 1,
4444                          G_TYPE_OBJECT);
4445         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4446                          G_TYPE_FROM_CLASS (object_class),
4447                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4448                          G_STRUCT_OFFSET (EvViewClass, external_link),
4449                          NULL, NULL,
4450                          g_cclosure_marshal_VOID__OBJECT,
4451                          G_TYPE_NONE, 1,
4452                          G_TYPE_OBJECT);
4453         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4454                          G_TYPE_FROM_CLASS (object_class),
4455                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4456                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4457                          NULL, NULL,
4458                          g_cclosure_marshal_VOID__OBJECT,
4459                          G_TYPE_NONE, 1,
4460                          G_TYPE_OBJECT);
4461
4462
4463         g_object_class_install_property (object_class,
4464                                          PROP_CONTINUOUS,
4465                                          g_param_spec_boolean ("continuous",
4466                                                                "Continuous",
4467                                                                "Continuous scrolling mode",
4468                                                                TRUE,
4469                                                                G_PARAM_READWRITE));
4470
4471         g_object_class_install_property (object_class,
4472                                          PROP_DUAL_PAGE,
4473                                          g_param_spec_boolean ("dual-page",
4474                                                                "Dual Page",
4475                                                                "Two pages visible at once",
4476                                                                FALSE,
4477                                                                G_PARAM_READWRITE));
4478         g_object_class_install_property (object_class,
4479                                          PROP_FULLSCREEN,
4480                                          g_param_spec_boolean ("fullscreen",
4481                                                                "Full Screen",
4482                                                                "Draw page in a fullscreen fashion",
4483                                                                FALSE,
4484                                                                G_PARAM_READWRITE));
4485         g_object_class_install_property (object_class,
4486                                          PROP_PRESENTATION,
4487                                          g_param_spec_boolean ("presentation",
4488                                                                "Presentation",
4489                                                                "Draw page in presentation mode",
4490                                                                TRUE,
4491                                                                G_PARAM_READWRITE));
4492
4493         g_object_class_install_property (object_class,
4494                                          PROP_SIZING_MODE,
4495                                          g_param_spec_enum ("sizing-mode",
4496                                                             "Sizing Mode",
4497                                                             "Sizing Mode",
4498                                                             EV_TYPE_SIZING_MODE,
4499                                                             EV_SIZING_FIT_WIDTH,
4500                                                             G_PARAM_READWRITE));
4501
4502         g_object_class_install_property (object_class,
4503                                          PROP_ZOOM,
4504                                          g_param_spec_double ("zoom",
4505                                                               "Zoom factor",
4506                                                               "Zoom factor",
4507                                                               0,
4508                                                               G_MAXDOUBLE,
4509                                                               1.0,
4510                                                               G_PARAM_READWRITE));
4511         g_object_class_install_property (object_class,
4512                                          PROP_ROTATION,
4513                                          g_param_spec_double ("rotation",
4514                                                               "Rotation",
4515                                                               "Rotation",
4516                                                               0,
4517                                                               360,
4518                                                               0,
4519                                                               G_PARAM_READWRITE));
4520         g_object_class_install_property (object_class,
4521                                          PROP_HAS_SELECTION,
4522                                          g_param_spec_boolean ("has-selection",
4523                                                                "Has selection",
4524                                                                "The view has selections",
4525                                                                FALSE,
4526                                                                G_PARAM_READABLE));
4527
4528         binding_set = gtk_binding_set_by_class (class);
4529
4530         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4531         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4532         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4533         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4534         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4535         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4536         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4537         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4538         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4539                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4540         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4541                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4542         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4543                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4544         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4545                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4546
4547 }
4548
4549 static void
4550 ev_view_init (EvView *view)
4551 {
4552         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4553
4554         view->start_page = -1;
4555         view->end_page = -1;
4556         view->spacing = 5;
4557         view->scale = 1.0;
4558         view->current_page = 0;
4559         view->pressed_button = -1;
4560         view->cursor = EV_VIEW_CURSOR_NORMAL;
4561         view->drag_info.in_drag = FALSE;
4562         view->scroll_info.autoscrolling = FALSE;
4563         view->selection_info.selections = NULL;
4564         view->selection_info.in_selection = FALSE;
4565         view->selection_info.in_drag = FALSE;
4566         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4567         view->continuous = TRUE;
4568         view->dual_page = FALSE;
4569         view->presentation = FALSE;
4570         view->presentation_state = EV_PRESENTATION_NORMAL;
4571         view->fullscreen = FALSE;
4572         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4573         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4574         view->jump_to_find_result = TRUE;
4575         view->highlight_find_results = FALSE;
4576
4577         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4578         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4579 }
4580
4581 /*** Callbacks ***/
4582
4583 static void
4584 ev_view_change_page (EvView *view,
4585                      gint    new_page,
4586                      gboolean start_transition)
4587 {
4588         gint x, y;
4589
4590         view->current_page = new_page;
4591         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4592
4593         if (view->presentation && start_transition)
4594                 ev_view_presentation_transition_start (view);
4595
4596         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4597         ev_view_handle_cursor_over_xy (view, x, y);
4598
4599         gtk_widget_queue_resize (GTK_WIDGET (view));
4600 }
4601
4602 static void
4603 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4604                                      EvView                *view)
4605 {
4606         g_object_unref (view->animation);
4607         view->animation = NULL;
4608         ev_view_change_page (view, view->current_page, TRUE);
4609 }
4610
4611 /**
4612  * ev_view_transition_animation_cancel:
4613  * @animation: Animation to finish
4614  * @view: An EvView
4615  *
4616  * Does almost the same as cancel, but without scheduling the transition.
4617  */
4618
4619 static void
4620 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4621                                      EvView                *view)
4622 {
4623         g_object_unref (view->animation);
4624         view->animation = NULL;
4625         ev_view_change_page (view, view->current_page, FALSE);
4626 }
4627
4628 static void
4629 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4630                                     gdouble                progress,
4631                                     EvView                *view)
4632 {
4633         gtk_widget_queue_draw (GTK_WIDGET (view));
4634 }
4635
4636 static void
4637 ev_view_presentation_animation_start (EvView *view,
4638                                       int     new_page)
4639 {
4640         EvTransitionEffect *effect = NULL;
4641         cairo_surface_t *surface;
4642
4643         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4644                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4645                                                             view->current_page);
4646         if (!effect)
4647                 return;
4648
4649         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4650         view->animation = ev_transition_animation_new (effect);
4651         ev_transition_animation_set_origin_surface (view->animation, surface);
4652
4653         g_signal_connect (view->animation, "frame",
4654                           G_CALLBACK (ev_view_transition_animation_frame), view);
4655         g_signal_connect (view->animation, "finished",
4656                           G_CALLBACK (ev_view_transition_animation_finish), view);
4657 }
4658
4659 static void
4660 job_finished_cb (EvPixbufCache *pixbuf_cache,
4661                  GdkRegion     *region,
4662                  EvView        *view)
4663 {
4664         if (view->animation) {
4665                 cairo_surface_t *surface;
4666
4667                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4668                 ev_transition_animation_set_dest_surface (view->animation, surface);
4669         }
4670
4671         if (region) {
4672                 gdk_window_invalidate_region (view->layout.bin_window,
4673                                               region, TRUE);
4674         } else {
4675                 gtk_widget_queue_draw (GTK_WIDGET (view));
4676         }
4677 }
4678
4679 static void
4680 page_changed_cb (EvPageCache *page_cache,
4681                  int          new_page,
4682                  EvView      *view)
4683 {
4684         if (view->current_page != new_page) {
4685                 if (view->presentation)
4686                         ev_view_presentation_animation_start (view, new_page);
4687
4688                 ev_view_change_page (view, new_page, TRUE);
4689         } else {
4690                 gtk_widget_queue_draw (GTK_WIDGET (view));
4691         }
4692
4693         view->find_result = 0;
4694 }
4695
4696 static void
4697 on_adjustment_value_changed (GtkAdjustment *adjustment,
4698                              EvView        *view)
4699 {
4700         int dx = 0, dy = 0;
4701         gint x, y;
4702         GList *children, *l;
4703
4704         if (! GTK_WIDGET_REALIZED (view))
4705                 return;
4706
4707         if (view->hadjustment) {
4708                 dx = view->scroll_x - (int) view->hadjustment->value;
4709                 view->scroll_x = (int) view->hadjustment->value;
4710         } else {
4711                 view->scroll_x = 0;
4712         }
4713
4714         if (view->vadjustment) {
4715                 dy = view->scroll_y - (int) view->vadjustment->value;
4716                 view->scroll_y = (int) view->vadjustment->value;
4717         } else {
4718                 view->scroll_y = 0;
4719         }
4720
4721         children = gtk_container_get_children (GTK_CONTAINER (view));
4722         for (l = children; l && l->data; l = g_list_next (l)) {
4723                 gint       child_x, child_y;
4724                 GtkWidget *child = (GtkWidget *)l->data;
4725
4726                 gtk_container_child_get (GTK_CONTAINER (view),
4727                                          child,
4728                                          "x", &child_x,
4729                                          "y", &child_y,
4730                                          NULL);
4731                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4732         }
4733         g_list_free (children);
4734
4735         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4736                 EvViewWindowChild *child;
4737
4738                 child = (EvViewWindowChild *)l->data;
4739
4740                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4741         }
4742
4743         if (view->pending_resize)
4744                 gtk_widget_queue_draw (GTK_WIDGET (view));
4745         else
4746                 gdk_window_scroll (view->layout.bin_window, dx, dy);
4747
4748         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4749         ev_view_handle_cursor_over_xy (view, x, y);
4750
4751         if (view->document)
4752                 view_update_range_and_current_page (view);
4753 }
4754
4755 GtkWidget*
4756 ev_view_new (void)
4757 {
4758         GtkWidget *view;
4759
4760         view = g_object_new (EV_TYPE_VIEW, NULL);
4761
4762         return view;
4763 }
4764
4765 static void
4766 setup_caches (EvView *view)
4767 {
4768         view->page_cache = ev_page_cache_get (view->document);
4769         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
4770         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
4771         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4772         page_changed_cb (view->page_cache,
4773                          ev_page_cache_get_current_page (view->page_cache),
4774                          view);
4775 }
4776
4777 static void
4778 clear_caches (EvView *view)
4779 {
4780         if (view->pixbuf_cache) {
4781                 g_object_unref (view->pixbuf_cache);
4782                 view->pixbuf_cache = NULL;
4783         }
4784
4785         if (view->page_cache) {
4786                 view->page_cache = NULL;
4787         }
4788 }
4789
4790 void
4791 ev_view_set_loading (EvView       *view,
4792                      gboolean      loading)
4793 {
4794         view->loading = loading;
4795         gtk_widget_queue_draw (GTK_WIDGET (view));
4796 }
4797
4798 static gboolean
4799 ev_view_autoscroll_cb (EvView *view)
4800 {
4801         gdouble speed, value;
4802
4803         /* If the user stops autoscrolling, autoscrolling will be
4804          * set to false but the timeout will continue; stop the timeout: */
4805         if (!view->scroll_info.autoscrolling) {
4806                 view->scroll_info.timeout_id = 0;
4807                 return FALSE;
4808         }
4809
4810         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4811                 (view->scroll_info.last_y < view->scroll_info.start_y))
4812                 return TRUE;
4813
4814         /* Replace 100 with your speed of choice: The lower the faster.
4815          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4816          *      based on the distance of the starting point from the mouse
4817          * (All also effected by the timeout interval of this callback) */
4818
4819         if (view->scroll_info.start_y > view->scroll_info.last_y)
4820                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
4821         else
4822                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
4823
4824         value = gtk_adjustment_get_value (view->vadjustment);
4825         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
4826         gtk_adjustment_set_value (view->vadjustment, value);
4827
4828         return TRUE;
4829
4830 }
4831
4832 void
4833 ev_view_autoscroll_start (EvView *view)
4834 {
4835         gint x, y;
4836
4837         g_return_if_fail (EV_IS_VIEW (view));
4838
4839         if (view->scroll_info.autoscrolling)
4840                 return;
4841
4842         view->scroll_info.autoscrolling = TRUE;
4843         view->scroll_info.timeout_id =
4844                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
4845                                view);
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_autoscroll_stop (EvView *view)
4853 {
4854         gint x, y;
4855
4856         g_return_if_fail (EV_IS_VIEW (view));
4857
4858         if (!view->scroll_info.autoscrolling)
4859                 return;
4860
4861         view->scroll_info.autoscrolling = FALSE;
4862         if (view->scroll_info.timeout_id) {
4863                 g_source_remove (view->scroll_info.timeout_id);
4864                 view->scroll_info.timeout_id = 0;
4865         }
4866
4867         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4868         ev_view_handle_cursor_over_xy (view, x, y);
4869 }
4870
4871 void
4872 ev_view_set_document (EvView     *view,
4873                       EvDocument *document)
4874 {
4875         g_return_if_fail (EV_IS_VIEW (view));
4876
4877         view->loading = FALSE;
4878
4879         if (document != view->document) {
4880                 clear_caches (view);
4881
4882                 if (view->document) {
4883                         g_object_unref (view->document);
4884                         view->page_cache = NULL;
4885                 }
4886
4887                 view->document = document;
4888                 view->find_result = 0;
4889
4890                 if (view->document) {
4891                         g_object_ref (view->document);
4892                         setup_caches (view);
4893                 }
4894
4895                 view_update_range_and_current_page (view);
4896
4897                 gtk_widget_queue_resize (GTK_WIDGET (view));
4898         }
4899 }
4900
4901 static void
4902 ev_view_reload_page (EvView    *view,
4903                      gint       page,
4904                      GdkRegion *region)
4905 {
4906         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
4907                                      region,
4908                                      page,
4909                                      view->rotation,
4910                                      view->scale);
4911 }
4912
4913 void
4914 ev_view_reload (EvView *view)
4915 {
4916         ev_pixbuf_cache_clear (view->pixbuf_cache);
4917         view_update_range_and_current_page (view);
4918 }
4919
4920 /*** Zoom and sizing mode ***/
4921
4922 #define EPSILON 0.0000001
4923 void
4924 ev_view_set_zoom (EvView   *view,
4925                   double    factor,
4926                   gboolean  relative)
4927 {
4928         double scale;
4929
4930         if (relative)
4931                 scale = view->scale * factor;
4932         else
4933                 scale = factor;
4934
4935         scale = CLAMP (scale,
4936                        view->sizing_mode == EV_SIZING_FREE ? view->min_scale : 0,
4937                        view->max_scale);
4938
4939         if (scale == view->scale)
4940                 return;
4941
4942         if (ABS (view->scale - scale) < EPSILON)
4943                 return;
4944
4945         if (view->loading_text) {
4946                 cairo_surface_destroy (view->loading_text);
4947                 view->loading_text = NULL;
4948         }
4949
4950         view->scale = scale;
4951         view->pending_resize = TRUE;
4952
4953         gtk_widget_queue_resize (GTK_WIDGET (view));
4954
4955         g_object_notify (G_OBJECT (view), "zoom");
4956 }
4957
4958 double
4959 ev_view_get_zoom (EvView *view)
4960 {
4961         return view->scale;
4962 }
4963
4964 void
4965 ev_view_set_screen_dpi (EvView  *view,
4966                         gdouble  dpi)
4967 {
4968         g_return_if_fail (EV_IS_VIEW (view));
4969         g_return_if_fail (dpi > 0);
4970
4971         view->dpi = dpi;
4972         view->min_scale = MIN_SCALE * dpi / 72.0;
4973         view->max_scale = MAX_SCALE * dpi / 72.0;
4974 }
4975
4976 gboolean
4977 ev_view_get_continuous (EvView *view)
4978 {
4979         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4980
4981         return view->continuous;
4982 }
4983
4984 void
4985 ev_view_set_continuous (EvView   *view,
4986                         gboolean  continuous)
4987 {
4988         g_return_if_fail (EV_IS_VIEW (view));
4989
4990         continuous = continuous != FALSE;
4991
4992         if (view->continuous != continuous) {
4993                 view->continuous = continuous;
4994                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4995                 gtk_widget_queue_resize (GTK_WIDGET (view));
4996         }
4997
4998         g_object_notify (G_OBJECT (view), "continuous");
4999 }
5000
5001 gboolean
5002 ev_view_get_dual_page (EvView *view)
5003 {
5004         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5005
5006         return view->dual_page;
5007 }
5008
5009 void
5010 ev_view_set_dual_page (EvView   *view,
5011                        gboolean  dual_page)
5012 {
5013         g_return_if_fail (EV_IS_VIEW (view));
5014
5015         dual_page = dual_page != FALSE;
5016
5017         if (view->dual_page == dual_page)
5018                 return;
5019
5020         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5021         view->dual_page = dual_page;
5022         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5023          * preload_cache_size to be 2 if dual_page is set.
5024          */
5025         gtk_widget_queue_resize (GTK_WIDGET (view));
5026
5027         g_object_notify (G_OBJECT (view), "dual-page");
5028 }
5029
5030 void
5031 ev_view_set_fullscreen (EvView   *view,
5032                          gboolean  fullscreen)
5033 {
5034         g_return_if_fail (EV_IS_VIEW (view));
5035
5036         fullscreen = fullscreen != FALSE;
5037
5038         if (view->fullscreen == fullscreen)
5039                 return;
5040
5041         view->fullscreen = fullscreen;
5042         gtk_widget_queue_resize (GTK_WIDGET (view));
5043
5044         g_object_notify (G_OBJECT (view), "fullscreen");
5045 }
5046
5047 gboolean
5048 ev_view_get_fullscreen (EvView *view)
5049 {
5050         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5051
5052         return view->fullscreen;
5053 }
5054
5055 void
5056 ev_view_set_presentation (EvView   *view,
5057                           gboolean  presentation)
5058 {
5059         g_return_if_fail (EV_IS_VIEW (view));
5060
5061         presentation = presentation != FALSE;
5062
5063         if (view->presentation == presentation)
5064                 return;
5065
5066         if (!presentation)
5067                 view->presentation_state = EV_PRESENTATION_NORMAL;
5068
5069         view->presentation = presentation;
5070         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5071
5072         if (presentation) {
5073                 view->sizing_mode_saved = view->sizing_mode;
5074                 view->scale_saved = view->scale;
5075                 ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
5076         } else {
5077                 ev_view_set_sizing_mode (view, view->sizing_mode_saved);
5078                 ev_view_set_zoom (view, view->scale_saved, FALSE);
5079         }
5080
5081         gtk_widget_queue_resize (GTK_WIDGET (view));
5082
5083         if (presentation)
5084                 ev_view_presentation_transition_start (view);
5085         else {
5086                 ev_view_presentation_transition_stop (view);
5087
5088                 if (view->animation) {
5089                         /* stop any running animation */
5090                         ev_view_transition_animation_cancel (view->animation, view);
5091                 }
5092         }
5093
5094         if (GTK_WIDGET_REALIZED (view)) {
5095                 if (view->presentation)
5096                         gdk_window_set_background (view->layout.bin_window,
5097                                                    &GTK_WIDGET (view)->style->black);
5098                 else
5099                         gdk_window_set_background (view->layout.bin_window,
5100                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
5101         }
5102
5103         g_object_notify (G_OBJECT (view), "presentation");
5104 }
5105
5106 gboolean
5107 ev_view_get_presentation (EvView *view)
5108 {
5109         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5110
5111         return view->presentation;
5112 }
5113
5114 static gboolean
5115 transition_next_page (EvView *view)
5116 {
5117         ev_view_next_page (view);
5118
5119         return FALSE;
5120 }
5121
5122 static void
5123 ev_view_presentation_transition_stop (EvView *view)
5124 {
5125         if (view->trans_timeout_id > 0)
5126                 g_source_remove (view->trans_timeout_id);
5127         view->trans_timeout_id = 0;
5128 }
5129
5130 static void
5131 ev_view_presentation_transition_start (EvView *view)
5132 {
5133         gdouble duration;
5134
5135         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
5136                 return;
5137
5138         ev_view_presentation_transition_stop (view);
5139
5140         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
5141                                                              view->current_page);
5142         if (duration > 0) {
5143                 view->trans_timeout_id =
5144                         g_timeout_add_seconds (duration,
5145                                                (GSourceFunc) transition_next_page,
5146                                                view);
5147         }
5148 }
5149
5150 void
5151 ev_view_set_sizing_mode (EvView       *view,
5152                          EvSizingMode  sizing_mode)
5153 {
5154         g_return_if_fail (EV_IS_VIEW (view));
5155
5156         if (view->sizing_mode == sizing_mode)
5157                 return;
5158
5159         view->sizing_mode = sizing_mode;
5160         gtk_widget_queue_resize (GTK_WIDGET (view));
5161
5162         g_object_notify (G_OBJECT (view), "sizing-mode");
5163 }
5164
5165 EvSizingMode
5166 ev_view_get_sizing_mode (EvView *view)
5167 {
5168         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
5169
5170         return view->sizing_mode;
5171 }
5172
5173 gboolean
5174 ev_view_can_zoom_in (EvView *view)
5175 {
5176         return view->scale * ZOOM_IN_FACTOR <= view->max_scale;
5177 }
5178
5179 gboolean
5180 ev_view_can_zoom_out (EvView *view)
5181 {
5182         return view->scale * ZOOM_OUT_FACTOR >= view->min_scale;
5183 }
5184
5185 void
5186 ev_view_zoom_in (EvView *view)
5187 {
5188         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5189
5190         if (view->presentation)
5191                 return;
5192
5193         view->pending_scroll = SCROLL_TO_CENTER;
5194         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
5195 }
5196
5197 void
5198 ev_view_zoom_out (EvView *view)
5199 {
5200         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5201
5202         if (view->presentation)
5203                 return;
5204
5205         view->pending_scroll = SCROLL_TO_CENTER;
5206         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
5207 }
5208
5209 void
5210 ev_view_rotate_right (EvView *view)
5211 {
5212         int rotation = view->rotation + 90;
5213
5214         if (rotation >= 360) {
5215                 rotation -= 360;
5216         }
5217
5218         ev_view_set_rotation (view, rotation);
5219 }
5220
5221 void
5222 ev_view_rotate_left (EvView *view)
5223 {
5224         int rotation = view->rotation - 90;
5225
5226         if (rotation < 0) {
5227                 rotation += 360;
5228         }
5229
5230         ev_view_set_rotation (view, rotation);
5231 }
5232
5233 void
5234 ev_view_set_rotation (EvView *view, int rotation)
5235 {
5236         view->rotation = rotation;
5237
5238         if (view->pixbuf_cache) {
5239                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5240                 gtk_widget_queue_resize (GTK_WIDGET (view));
5241         }
5242
5243         if (rotation != 0)
5244                 clear_selection (view);
5245
5246         g_object_notify (G_OBJECT (view), "rotation");
5247 }
5248
5249 int
5250 ev_view_get_rotation (EvView *view)
5251 {
5252         return view->rotation;
5253 }
5254
5255 static double
5256 zoom_for_size_fit_width (int doc_width,
5257                          int doc_height,
5258                          int target_width,
5259                          int target_height,
5260                          int vsb_width)
5261 {
5262         double scale;
5263
5264         scale = (double)target_width / doc_width;
5265
5266         if (doc_height * scale > target_height)
5267                 scale = (double) (target_width - vsb_width) / doc_width;
5268
5269         return scale;
5270 }
5271
5272 static double
5273 zoom_for_size_fit_height (int doc_width,
5274                           int doc_height,
5275                           int target_width,
5276                           int target_height,
5277                           int vsb_height)
5278 {
5279         double scale;
5280
5281         scale = (double)target_height / doc_height;
5282
5283         if (doc_width * scale > target_width)
5284                 scale = (double) (target_height - vsb_height) / doc_height;
5285
5286         return scale;
5287 }
5288
5289 static double
5290 zoom_for_size_best_fit (int doc_width,
5291                         int doc_height,
5292                         int target_width,
5293                         int target_height,
5294                         int vsb_width,
5295                         int hsb_width)
5296 {
5297         double w_scale;
5298         double h_scale;
5299
5300         w_scale = (double)target_width / doc_width;
5301         h_scale = (double)target_height / doc_height;
5302
5303         if (doc_height * w_scale > target_height)
5304                 w_scale = (double) (target_width - vsb_width) / doc_width;
5305         if (doc_width * h_scale > target_width)
5306                 h_scale = (double) (target_height - hsb_width) / doc_height;
5307
5308         return MIN (w_scale, h_scale);
5309 }
5310
5311
5312 static void
5313 ev_view_zoom_for_size_presentation (EvView *view,
5314                                     int     width,
5315                                     int     height)
5316 {
5317         int doc_width, doc_height;
5318         gdouble scale;
5319
5320         ev_page_cache_get_size (view->page_cache,
5321                                 view->current_page,
5322                                 view->rotation,
5323                                 1.0,
5324                                 &doc_width,
5325                                 &doc_height);
5326         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
5327         ev_view_set_zoom (view, scale, FALSE);
5328 }
5329
5330 static void
5331 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5332                            int     width,
5333                            int     height,
5334                            int     vsb_width,
5335                            int     hsb_height)
5336 {
5337         int doc_width, doc_height;
5338         GtkBorder border;
5339         gdouble scale;
5340
5341         ev_page_cache_get_max_width (view->page_cache,
5342                                      view->rotation,
5343                                      1.0,
5344                                      &doc_width);
5345         ev_page_cache_get_max_height (view->page_cache,
5346                                       view->rotation,
5347                                       1.0,
5348                                       &doc_height);
5349         compute_border (view, doc_width, doc_height, &border);
5350
5351         doc_width = doc_width * 2;
5352         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5353         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5354
5355         /* FIXME: We really need to calculate the overall height here, not the
5356          * page height.  We assume there's always a vertical scrollbar for
5357          * now.  We need to fix this. */
5358         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5359                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
5360         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5361                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
5362         else
5363                 g_assert_not_reached ();
5364
5365         ev_view_set_zoom (view, scale, FALSE);
5366 }
5367
5368 static void
5369 ev_view_zoom_for_size_continuous (EvView *view,
5370                                   int     width,
5371                                   int     height,
5372                                   int     vsb_width,
5373                                   int     hsb_height)
5374 {
5375         int doc_width, doc_height;
5376         GtkBorder border;
5377         gdouble scale;
5378
5379         ev_page_cache_get_max_width (view->page_cache,
5380                                      view->rotation,
5381                                      1.0,
5382                                      &doc_width);
5383         ev_page_cache_get_max_height (view->page_cache,
5384                                       view->rotation,
5385                                       1.0,
5386                                       &doc_height);
5387         compute_border (view, doc_width, doc_height, &border);
5388
5389         width -= (border.left + border.right + 2 * view->spacing);
5390         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5391
5392         /* FIXME: We really need to calculate the overall height here, not the
5393          * page height.  We assume there's always a vertical scrollbar for
5394          * now.  We need to fix this. */
5395         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5396                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
5397         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5398                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
5399         else
5400                 g_assert_not_reached ();
5401
5402         ev_view_set_zoom (view, scale, FALSE);
5403 }
5404
5405 static void
5406 ev_view_zoom_for_size_dual_page (EvView *view,
5407                                  int     width,
5408                                  int     height,
5409                                  int     vsb_width,
5410                                  int     hsb_height)
5411 {
5412         GtkBorder border;
5413         gint doc_width, doc_height;
5414         gdouble scale;
5415         gint other_page;
5416
5417         other_page = view->current_page ^ 1;
5418
5419         /* Find the largest of the two. */
5420         ev_page_cache_get_size (view->page_cache,
5421                                 view->current_page,
5422                                 view->rotation,
5423                                 1.0,
5424                                 &doc_width, &doc_height);
5425
5426         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
5427                 gint width_2, height_2;
5428                 ev_page_cache_get_size (view->page_cache,
5429                                         other_page,
5430                                         view->rotation,
5431                                         1.0,
5432                                         &width_2, &height_2);
5433                 if (width_2 > doc_width)
5434                         doc_width = width_2;
5435                 if (height_2 > doc_height)
5436                         doc_height = height_2;
5437         }
5438         compute_border (view, doc_width, doc_height, &border);
5439
5440         doc_width = doc_width * 2;
5441         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5442         height -= (border.top + border.bottom + 2 * view->spacing);
5443
5444         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5445                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
5446         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5447                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
5448         else
5449                 g_assert_not_reached ();
5450
5451         ev_view_set_zoom (view, scale, FALSE);
5452 }
5453
5454 static void
5455 ev_view_zoom_for_size_single_page (EvView *view,
5456                                    int     width,
5457                                    int     height,
5458                                    int     vsb_width,
5459                                    int     hsb_height)
5460 {
5461         int doc_width, doc_height;
5462         GtkBorder border;
5463         gdouble scale;
5464
5465         ev_page_cache_get_size (view->page_cache,
5466                                 view->current_page,
5467                                 view->rotation,
5468                                 1.0,
5469                                 &doc_width,
5470                                 &doc_height);
5471         /* Get an approximate border */
5472         compute_border (view, width, height, &border);
5473
5474         width -= (border.left + border.right + 2 * view->spacing);
5475         height -= (border.top + border.bottom + 2 * view->spacing);
5476
5477         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5478                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
5479         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5480                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
5481         else
5482                 g_assert_not_reached ();
5483
5484         ev_view_set_zoom (view, scale, FALSE);
5485 }
5486
5487 void
5488 ev_view_set_zoom_for_size (EvView *view,
5489                            int     width,
5490                            int     height,
5491                            int     vsb_width,
5492                            int     hsb_height)
5493 {
5494         g_return_if_fail (EV_IS_VIEW (view));
5495         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5496                           view->sizing_mode == EV_SIZING_BEST_FIT);
5497         g_return_if_fail (width >= 0);
5498         g_return_if_fail (height >= 0);
5499
5500         if (view->document == NULL)
5501                 return;
5502
5503         if (view->presentation)
5504                 ev_view_zoom_for_size_presentation (view, width, height);
5505         else if (view->continuous && view->dual_page)
5506                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
5507         else if (view->continuous)
5508                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
5509         else if (view->dual_page)
5510                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
5511         else
5512                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
5513 }
5514
5515 /*** Find ***/
5516 static gint
5517 ev_view_find_get_n_results (EvView *view, gint page)
5518 {
5519         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5520 }
5521
5522 static EvRectangle *
5523 ev_view_find_get_result (EvView *view, gint page, gint result)
5524 {
5525         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5526 }
5527
5528 static void
5529 jump_to_find_result (EvView *view)
5530 {
5531         gint n_results;
5532         gint page = view->current_page;
5533
5534         n_results = ev_view_find_get_n_results (view, page);
5535
5536         if (n_results > 0 && view->find_result < n_results) {
5537                 EvRectangle *rect;
5538                 GdkRectangle view_rect;
5539
5540                 rect = ev_view_find_get_result (view, page, view->find_result);
5541                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5542                 ensure_rectangle_is_visible (view, &view_rect);
5543                 view->jump_to_find_result = FALSE;
5544         }
5545 }
5546
5547 /**
5548  * jump_to_find_page
5549  * @view: #EvView instance
5550  * @direction: Direction to look
5551  * @shift: Shift from current page
5552  *
5553  * Jumps to the first page that has occurences of searched word.
5554  * Uses a direction where to look and a shift from current page.
5555  *
5556  */
5557 static void
5558 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5559 {
5560         int n_pages, i;
5561
5562         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5563
5564         for (i = 0; i < n_pages; i++) {
5565                 int page;
5566
5567                 if (direction == EV_VIEW_FIND_NEXT)
5568                         page = view->current_page + i;
5569                 else
5570                         page = view->current_page - i;
5571                 page += shift;
5572
5573                 if (page >= n_pages) {
5574                         page = page - n_pages;
5575                 } else if (page < 0)
5576                         page = page + n_pages;
5577
5578                 if (ev_view_find_get_n_results (view, page) > 0) {
5579                         ev_page_cache_set_current_page (view->page_cache, page);
5580                         break;
5581                 }
5582         }
5583 }
5584
5585 void
5586 ev_view_find_changed (EvView *view, GList **results, gint page)
5587 {
5588         view->find_pages = results;
5589
5590         if (view->jump_to_find_result == TRUE) {
5591                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5592                 jump_to_find_result (view);
5593         }
5594
5595         if (view->current_page == page)
5596                 gtk_widget_queue_draw (GTK_WIDGET (view));
5597 }
5598
5599 void
5600 ev_view_find_next (EvView *view)
5601 {
5602         gint n_results;
5603
5604         n_results = ev_view_find_get_n_results (view, view->current_page);
5605         view->find_result++;
5606
5607         if (view->find_result >= n_results) {
5608                 view->find_result = 0;
5609                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5610                 jump_to_find_result (view);
5611         } else {
5612                 jump_to_find_result (view);
5613                 gtk_widget_queue_draw (GTK_WIDGET (view));
5614         }
5615 }
5616
5617 void
5618 ev_view_find_previous (EvView *view)
5619 {
5620         view->find_result--;
5621
5622         if (view->find_result < 0) {
5623                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5624                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5625                 jump_to_find_result (view);
5626         } else {
5627                 jump_to_find_result (view);
5628                 gtk_widget_queue_draw (GTK_WIDGET (view));
5629         }
5630 }
5631
5632 void
5633 ev_view_find_search_changed (EvView *view)
5634 {
5635         /* search string has changed, focus on new search result */
5636         view->jump_to_find_result = TRUE;
5637         view->find_pages = NULL;
5638 }
5639
5640 void
5641 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5642 {
5643         view->highlight_find_results = value;
5644         gtk_widget_queue_draw (GTK_WIDGET (view));
5645 }
5646
5647 void
5648 ev_view_find_cancel (EvView *view)
5649 {
5650         view->find_pages = NULL;
5651 }
5652
5653 /*** Selections ***/
5654
5655 /* compute_new_selection_rect/text calculates the area currently selected by
5656  * view_rect.  each handles a different mode;
5657  */
5658 static GList *
5659 compute_new_selection_rect (EvView       *view,
5660                             GdkPoint     *start,
5661                             GdkPoint     *stop)
5662 {
5663         GdkRectangle view_rect;
5664         int n_pages, i;
5665         GList *list = NULL;
5666
5667         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5668
5669         view_rect.x = MIN (start->x, stop->x);
5670         view_rect.y = MIN (start->y, stop->y);
5671         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5672         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5673
5674         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5675
5676         for (i = 0; i < n_pages; i++) {
5677                 GdkRectangle page_area;
5678                 GtkBorder border;
5679
5680                 if (get_page_extents (view, i, &page_area, &border)) {
5681                         GdkRectangle overlap;
5682
5683                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5684                                 EvViewSelection *selection;
5685
5686                                 selection = g_new0 (EvViewSelection, 1);
5687                                 selection->page = i;
5688                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5689                                                        &(selection->rect));
5690
5691                                 list = g_list_append (list, selection);
5692                         }
5693                 }
5694         }
5695
5696         return list;
5697 }
5698
5699 static gboolean
5700 gdk_rectangle_point_in (GdkRectangle *rectangle,
5701                         GdkPoint     *point)
5702 {
5703         return rectangle->x <= point->x &&
5704                 rectangle->y <= point->y &&
5705                 point->x < rectangle->x + rectangle->width &&
5706                 point->y < rectangle->y + rectangle->height;
5707 }
5708
5709 static GList *
5710 compute_new_selection_text (EvView          *view,
5711                             EvSelectionStyle style,
5712                             GdkPoint        *start,
5713                             GdkPoint        *stop)
5714 {
5715         int n_pages, i, first, last;
5716         GList *list = NULL;
5717         EvViewSelection *selection;
5718         gint width, height;
5719         int start_page, end_page;
5720
5721         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5722
5723         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5724
5725         /* First figure out the range of pages the selection
5726          * affects. */
5727         first = n_pages;
5728         last = 0;
5729         if (view->continuous) {
5730                 start_page = 0;
5731                 end_page = n_pages;
5732         } else if (view->dual_page) {
5733                 start_page = view->start_page;
5734                 end_page = view->end_page + 1;
5735         } else {
5736                 start_page = view->current_page;
5737                 end_page = view->current_page + 1;
5738         }
5739
5740         for (i = start_page; i < end_page; i++) {
5741                 GdkRectangle page_area;
5742                 GtkBorder border;
5743
5744                 get_page_extents (view, i, &page_area, &border);
5745                 if (gdk_rectangle_point_in (&page_area, start) ||
5746                     gdk_rectangle_point_in (&page_area, stop)) {
5747                         if (first == n_pages)
5748                                 first = i;
5749                         last = i;
5750                 }
5751
5752         }
5753
5754         /* Now create a list of EvViewSelection's for the affected
5755          * pages.  This could be an empty list, a list of just one
5756          * page or a number of pages.*/
5757         for (i = first; i < last + 1; i++) {
5758                 GdkRectangle page_area;
5759                 GtkBorder border;
5760                 GdkPoint *point;
5761
5762                 ev_page_cache_get_size (view->page_cache, i,
5763                                         view->rotation,
5764                                         1.0, &width, &height);
5765
5766                 selection = g_new0 (EvViewSelection, 1);
5767                 selection->page = i;
5768                 selection->style = style;
5769                 selection->rect.x1 = selection->rect.y1 = 0;
5770                 selection->rect.x2 = width;
5771                 selection->rect.y2 = height;
5772
5773                 get_page_extents (view, i, &page_area, &border);
5774
5775                 if (gdk_rectangle_point_in (&page_area, start))
5776                         point = start;
5777                 else
5778                         point = stop;
5779
5780                 if (i == first)
5781                         view_point_to_doc_point (view, point, &page_area,
5782                                                  &selection->rect.x1,
5783                                                  &selection->rect.y1);
5784
5785                 /* If the selection is contained within just one page,
5786                  * make sure we don't write 'start' into both points
5787                  * in selection->rect. */
5788                 if (first == last)
5789                         point = stop;
5790
5791                 if (i == last)
5792                         view_point_to_doc_point (view, point, &page_area,
5793                                                  &selection->rect.x2,
5794                                                  &selection->rect.y2);
5795
5796                 list = g_list_append (list, selection);
5797         }
5798
5799         return list;
5800 }
5801
5802 /* This function takes the newly calculated list, and figures out which regions
5803  * have changed.  It then queues a redraw approporiately.
5804  */
5805 static void
5806 merge_selection_region (EvView *view,
5807                         GList  *new_list)
5808 {
5809         GList *old_list;
5810         GList *new_list_ptr, *old_list_ptr;
5811
5812         /* Update the selection */
5813         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5814         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5815         g_list_free (view->selection_info.selections);
5816         view->selection_info.selections = new_list;
5817         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5818         g_object_notify (G_OBJECT (view), "has-selection");
5819
5820         new_list_ptr = new_list;
5821         old_list_ptr = old_list;
5822
5823         while (new_list_ptr || old_list_ptr) {
5824                 EvViewSelection *old_sel, *new_sel;
5825                 int cur_page;
5826                 GdkRegion *region = NULL;
5827
5828                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5829                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5830
5831                 /* Assume that the lists are in order, and we run through them
5832                  * comparing them, one page at a time.  We come out with the
5833                  * first page we see. */
5834                 if (new_sel && old_sel) {
5835                         if (new_sel->page < old_sel->page) {
5836                                 new_list_ptr = new_list_ptr->next;
5837                                 old_sel = NULL;
5838                         } else if (new_sel->page > old_sel->page) {
5839                                 old_list_ptr = old_list_ptr->next;
5840                                 new_sel = NULL;
5841                         } else {
5842                                 new_list_ptr = new_list_ptr->next;
5843                                 old_list_ptr = old_list_ptr->next;
5844                         }
5845                 } else if (new_sel) {
5846                         new_list_ptr = new_list_ptr->next;
5847                 } else if (old_sel) {
5848                         old_list_ptr = old_list_ptr->next;
5849                 }
5850
5851                 g_assert (new_sel || old_sel);
5852
5853                 /* is the page we're looking at on the screen?*/
5854                 cur_page = new_sel ? new_sel->page : old_sel->page;
5855                 if (cur_page < view->start_page || cur_page > view->end_page)
5856                         continue;
5857
5858                 /* seed the cache with a new page.  We are going to need the new
5859                  * region too. */
5860                 if (new_sel) {
5861                         GdkRegion *tmp_region = NULL;
5862
5863                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5864                                                                cur_page,
5865                                                                view->scale,
5866                                                                &tmp_region);
5867
5868                         if (tmp_region) {
5869                                 new_sel->covered_region = gdk_region_copy (tmp_region);
5870                         }
5871                 }
5872
5873                 /* Now we figure out what needs redrawing */
5874                 if (old_sel && new_sel) {
5875                         if (old_sel->covered_region && new_sel->covered_region) {
5876                                 /* We only want to redraw the areas that have
5877                                  * changed, so we xor the old and new regions
5878                                  * and redraw if it's different */
5879                                 region = gdk_region_copy (old_sel->covered_region);
5880                                 gdk_region_xor (region, new_sel->covered_region);
5881                                 if (gdk_region_empty (region)) {
5882                                         gdk_region_destroy (region);
5883                                         region = NULL;
5884                                 }
5885                         } else if (old_sel->covered_region) {
5886                                 region = gdk_region_copy (old_sel->covered_region);
5887                         } else if (new_sel->covered_region) {
5888                                 region = gdk_region_copy (new_sel->covered_region);
5889                         }
5890                 } else if (old_sel && !new_sel) {
5891                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
5892                                 region = gdk_region_copy (old_sel->covered_region);
5893                         }
5894                 } else if (!old_sel && new_sel) {
5895                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
5896                                 region = gdk_region_copy (new_sel->covered_region);
5897                         }
5898                 } else {
5899                         g_assert_not_reached ();
5900                 }
5901
5902                 /* Redraw the damaged region! */
5903                 if (region) {
5904                         GdkRectangle page_area;
5905                         GtkBorder border;
5906
5907                         /* I don't know why but the region is smaller
5908                          * than expected. This hack fixes it, I guess
5909                          * 10 pixels more won't hurt
5910                          */
5911                         gdk_region_shrink (region, -5, -5);
5912
5913                         get_page_extents (view, cur_page, &page_area, &border);
5914                         gdk_region_offset (region,
5915                                            page_area.x + border.left - view->scroll_x,
5916                                            page_area.y + border.top - view->scroll_y);
5917                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
5918                         gdk_region_destroy (region);
5919                 }
5920         }
5921
5922         /* Free the old list, now that we're done with it. */
5923         g_list_foreach (old_list, (GFunc) selection_free, NULL);
5924         g_list_free (old_list);
5925 }
5926
5927 static void
5928 compute_selections (EvView          *view,
5929                     EvSelectionStyle style,
5930                     GdkPoint        *start,
5931                     GdkPoint        *stop)
5932 {
5933         GList *list;
5934
5935         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
5936                 list = compute_new_selection_rect (view, start, stop);
5937         else
5938                 list = compute_new_selection_text (view, style, start, stop);
5939         merge_selection_region (view, list);
5940 }
5941
5942 /* Free's the selection.  It's up to the caller to queue redraws if needed.
5943  */
5944 static void
5945 selection_free (EvViewSelection *selection)
5946 {
5947         if (selection->covered_region)
5948                 gdk_region_destroy (selection->covered_region);
5949         g_free (selection);
5950 }
5951
5952 static void
5953 clear_selection (EvView *view)
5954 {
5955         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5956         g_list_free (view->selection_info.selections);
5957         view->selection_info.selections = NULL;
5958         view->selection_info.in_selection = FALSE;
5959         if (view->pixbuf_cache)
5960                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
5961         g_object_notify (G_OBJECT (view), "has-selection");
5962 }
5963
5964 void
5965 ev_view_select_all (EvView *view)
5966 {
5967         GList *selections = NULL;
5968         int n_pages, i;
5969
5970         /* Disable selection on rotated pages for the 0.4.0 series */
5971         if (view->rotation != 0)
5972                 return;
5973
5974         clear_selection (view);
5975
5976         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5977         for (i = 0; i < n_pages; i++) {
5978                 int width, height;
5979                 EvViewSelection *selection;
5980
5981                 ev_page_cache_get_size (view->page_cache,
5982                                         i,
5983                                         view->rotation,
5984                                         1.0, &width, &height);
5985
5986                 selection = g_new0 (EvViewSelection, 1);
5987                 selection->page = i;
5988                 selection->style = EV_SELECTION_STYLE_GLYPH;
5989                 selection->rect.x1 = selection->rect.y1 = 0;
5990                 selection->rect.x2 = width;
5991                 selection->rect.y2 = height;
5992
5993                 selections = g_list_append (selections, selection);
5994         }
5995
5996         merge_selection_region (view, selections);
5997         gtk_widget_queue_draw (GTK_WIDGET (view));
5998 }
5999
6000 gboolean
6001 ev_view_get_has_selection (EvView *view)
6002 {
6003         return view->selection_info.selections != NULL;
6004 }
6005
6006 static char *
6007 get_selected_text (EvView *view)
6008 {
6009         GString *text;
6010         GList *l;
6011         gchar *normalized_text;
6012         EvRenderContext *rc;
6013
6014         text = g_string_new (NULL);
6015         rc = ev_render_context_new (NULL, view->rotation, view->scale);
6016
6017         ev_document_doc_mutex_lock ();
6018
6019         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6020                 EvViewSelection *selection = (EvViewSelection *)l->data;
6021                 EvPage *page;
6022                 gchar *tmp;
6023
6024                 page = ev_document_get_page (view->document, selection->page);
6025                 ev_render_context_set_page (rc, page);
6026                 g_object_unref (page);
6027
6028                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6029                                                       rc, selection->style,
6030                                                       &(selection->rect));
6031
6032                 g_string_append (text, tmp);
6033                 g_free (tmp);
6034         }
6035
6036         g_object_unref (rc);
6037
6038         ev_document_doc_mutex_unlock ();
6039
6040         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6041         g_string_free (text, TRUE);
6042         return normalized_text;
6043 }
6044
6045 static void
6046 ev_view_clipboard_copy (EvView      *view,
6047                         const gchar *text)
6048 {
6049         GtkClipboard *clipboard;
6050
6051         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6052                                               GDK_SELECTION_CLIPBOARD);
6053         gtk_clipboard_set_text (clipboard, text, -1);
6054 }
6055
6056 void
6057 ev_view_copy (EvView *ev_view)
6058 {
6059         char *text;
6060
6061         if (!EV_IS_SELECTION (ev_view->document))
6062                 return;
6063
6064         text = get_selected_text (ev_view);
6065         ev_view_clipboard_copy (ev_view, text);
6066         g_free (text);
6067 }
6068
6069 static void
6070 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6071                         GtkSelectionData *selection_data,
6072                         guint             info,
6073                         gpointer          data)
6074 {
6075         EvView *ev_view = EV_VIEW (data);
6076
6077         if (ev_view->link_selected) {
6078                 gtk_selection_data_set_text (selection_data,
6079                                              ev_link_action_get_uri (ev_view->link_selected),
6080                                              -1);
6081         } else if (EV_IS_SELECTION (ev_view->document) &&
6082                    ev_view->selection_info.selections) {
6083                 gchar *text;
6084
6085                 text = get_selected_text (ev_view);
6086                 if (text) {
6087                         gtk_selection_data_set_text (selection_data, text, -1);
6088                         g_free (text);
6089                 }
6090         }
6091 }
6092
6093 static void
6094 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6095                           gpointer      data)
6096 {
6097         EvView *view = EV_VIEW (data);
6098
6099         clear_selection (view);
6100         clear_link_selected (view);
6101 }
6102
6103 static void
6104 ev_view_update_primary_selection (EvView *ev_view)
6105 {
6106         GtkClipboard *clipboard;
6107
6108         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6109                                               GDK_SELECTION_PRIMARY);
6110
6111         if (ev_view->selection_info.selections || ev_view->link_selected) {
6112                 GtkTargetList *target_list;
6113                 GtkTargetEntry *targets;
6114                 int n_targets;
6115
6116                 target_list = gtk_target_list_new (NULL, 0);
6117                 gtk_target_list_add_text_targets (target_list, 0);
6118                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6119                 gtk_target_list_unref (target_list);
6120
6121                 if (!gtk_clipboard_set_with_owner (clipboard,
6122                                                    targets, n_targets,
6123                                                    ev_view_primary_get_cb,
6124                                                    ev_view_primary_clear_cb,
6125                                                    G_OBJECT (ev_view)))
6126                         ev_view_primary_clear_cb (clipboard, ev_view);
6127
6128                 gtk_target_table_free (targets, n_targets);
6129         } else {
6130                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6131                         gtk_clipboard_clear (clipboard);
6132         }
6133 }
6134
6135 static void
6136 clear_link_selected (EvView *view)
6137 {
6138         if (view->link_selected) {
6139                 g_object_unref (view->link_selected);
6140                 view->link_selected = NULL;
6141         }
6142 }
6143
6144 void
6145 ev_view_copy_link_address (EvView       *view,
6146                            EvLinkAction *action)
6147 {
6148         clear_link_selected (view);
6149
6150         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6151
6152         view->link_selected = g_object_ref (action);
6153         ev_view_update_primary_selection (view);
6154 }
6155
6156 /*** Cursor operations ***/
6157
6158 static GdkCursor *
6159 ev_view_create_invisible_cursor(void)
6160 {
6161        GdkBitmap *empty;
6162        GdkColor black = { 0, 0, 0, 0 };
6163        static char bits[] = { 0x00 };
6164
6165        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
6166
6167        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
6168 }
6169
6170 static void
6171 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6172 {
6173         GdkCursor *cursor = NULL;
6174         GdkDisplay *display;
6175         GtkWidget *widget;
6176
6177         if (view->cursor == new_cursor) {
6178                 return;
6179         }
6180
6181         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6182         display = gtk_widget_get_display (widget);
6183         view->cursor = new_cursor;
6184
6185         switch (new_cursor) {
6186                 case EV_VIEW_CURSOR_NORMAL:
6187                         gdk_window_set_cursor (view->layout.bin_window, NULL);
6188                         break;
6189                 case EV_VIEW_CURSOR_IBEAM:
6190                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
6191                         break;
6192                 case EV_VIEW_CURSOR_LINK:
6193                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
6194                         break;
6195                 case EV_VIEW_CURSOR_WAIT:
6196                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
6197                         break;
6198                 case EV_VIEW_CURSOR_HIDDEN:
6199                         cursor = ev_view_create_invisible_cursor ();
6200                         break;
6201                 case EV_VIEW_CURSOR_DRAG:
6202                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
6203                         break;
6204                 case EV_VIEW_CURSOR_AUTOSCROLL:
6205                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
6206                         break;
6207         }
6208
6209         if (cursor) {
6210                 gdk_window_set_cursor (view->layout.bin_window, cursor);
6211                 gdk_cursor_unref (cursor);
6212                 gdk_flush();
6213         }
6214 }
6215
6216 void
6217 ev_view_hide_cursor (EvView *view)
6218 {
6219        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6220 }
6221
6222 void
6223 ev_view_show_cursor (EvView *view)
6224 {
6225        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6226 }
6227
6228 static void
6229 ev_view_reset_presentation_state (EvView *view)
6230 {
6231         if (!view->presentation ||
6232             view->presentation_state == EV_PRESENTATION_NORMAL)
6233                 return;
6234
6235         view->presentation_state = EV_PRESENTATION_NORMAL;
6236         gdk_window_set_background (view->layout.bin_window,
6237                                    &GTK_WIDGET (view)->style->black);
6238         gtk_widget_queue_draw (GTK_WIDGET (view));
6239 }
6240
6241 gboolean
6242 ev_view_next_page (EvView *view)
6243 {
6244         int page, n_pages;
6245
6246         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6247
6248         if (!view->page_cache)
6249                 return FALSE;
6250
6251         if (view->presentation &&
6252             (view->presentation_state == EV_PRESENTATION_BLACK ||
6253              view->presentation_state == EV_PRESENTATION_WHITE)) {
6254                 ev_view_reset_presentation_state (view);
6255                 return FALSE;
6256         }
6257
6258         if (view->animation) {
6259                 ev_view_transition_animation_cancel (view->animation, view);
6260         }
6261
6262         ev_view_presentation_transition_stop (view);
6263         ev_view_reset_presentation_state (view);
6264
6265         page = ev_page_cache_get_current_page (view->page_cache);
6266         n_pages = ev_page_cache_get_n_pages (view->page_cache);
6267
6268         if (view->dual_page && !view->presentation)
6269                 page = page + 2;
6270         else
6271                 page = page + 1;
6272
6273         if (page < n_pages) {
6274                 ev_page_cache_set_current_page (view->page_cache, page);
6275                 return TRUE;
6276         } else if (view->presentation && page == n_pages) {
6277                 view->presentation_state = EV_PRESENTATION_END;
6278                 gtk_widget_queue_draw (GTK_WIDGET (view));
6279                 return TRUE;
6280         } else if (view->dual_page && page == n_pages) {
6281                 ev_page_cache_set_current_page (view->page_cache, page - 1);
6282                 return TRUE;
6283         } else {
6284                 return FALSE;
6285         }
6286 }
6287
6288 gboolean
6289 ev_view_previous_page (EvView *view)
6290 {
6291         int page;
6292
6293         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6294
6295         if (!view->page_cache)
6296                 return FALSE;
6297
6298         if (view->presentation &&
6299             view->presentation_state == EV_PRESENTATION_END) {
6300                 ev_view_reset_presentation_state (view);
6301                 return TRUE;
6302         }
6303
6304         if (view->presentation &&
6305             (view->presentation_state == EV_PRESENTATION_BLACK ||
6306              view->presentation_state == EV_PRESENTATION_WHITE)) {
6307                 ev_view_reset_presentation_state (view);
6308                 return FALSE;
6309         }
6310
6311         if (view->animation) {
6312                 ev_view_transition_animation_cancel (view->animation, view);
6313         }
6314
6315         ev_view_reset_presentation_state (view);
6316
6317         page = ev_page_cache_get_current_page (view->page_cache);
6318
6319         if (view->dual_page && !view->presentation)
6320                 page = page - 2;
6321         else
6322                 page = page - 1;
6323
6324         if (page >= 0) {
6325                 ev_page_cache_set_current_page (view->page_cache, page);
6326                 return TRUE;
6327         } else if (ev_view_get_dual_page (view) && page == -1) {
6328                 ev_page_cache_set_current_page (view->page_cache, 0);
6329                 return TRUE;
6330         } else {
6331                 return FALSE;
6332         }
6333 }
6334