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.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-view.h"
  41 #include "ev-view-accessible.h"
  42 #include "ev-view-private.h"
  43
  44 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  45 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  46 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  47
  48 enum {
  49         PROP_0,
  50         PROP_CONTINUOUS,
  51         PROP_DUAL_PAGE,
  52         PROP_FULLSCREEN,
  53         PROP_PRESENTATION,
  54         PROP_SIZING_MODE,
  55         PROP_ZOOM,
  56         PROP_ROTATION,
  57         PROP_HAS_SELECTION,
  58 };
  59
  60 enum {
  61         SIGNAL_BINDING_ACTIVATED,
  62         SIGNAL_ZOOM_INVALID,
  63         SIGNAL_HANDLE_LINK,
  64         SIGNAL_EXTERNAL_LINK,
  65         SIGNAL_POPUP_MENU,
  66         N_SIGNALS,
  67 };
  68
  69 enum {
  70         TARGET_DND_URI,
  71         TARGET_DND_TEXT,
  72         TARGET_DND_IMAGE
  73 };
  74
  75 static guint signals[N_SIGNALS];
  76
  77 typedef enum {
  78         EV_VIEW_FIND_NEXT,
  79         EV_VIEW_FIND_PREV
  80 } EvViewFindDirection;
  81
  82 #define ZOOM_IN_FACTOR  1.2
  83 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  84
  85 #define MIN_SCALE 0.05409
  86 #define MAX_SCALE 4.0
  87
  88 #define SCROLL_TIME 150
  89
  90 /*** Scrolling ***/
  91 static void       scroll_to_current_page                     (EvView *view,
  92                                                               GtkOrientation orientation);
  93 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  94                                                               GtkAdjustment      *hadjustment,
  95                                                               GtkAdjustment      *vadjustment);
  96 static void       view_update_range_and_current_page         (EvView             *view);
  97 static void       set_scroll_adjustment                      (EvView             *view,
  98                                                               GtkOrientation      orientation,
  99                                                               GtkAdjustment      *adjustment);
 100 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 101                                                               guint               keyval,
 102                                                               GdkModifierType modifiers,
 103                                                               GtkScrollType       scroll,
 104                                                               gboolean            horizontal);
 105 static void       ensure_rectangle_is_visible                (EvView             *view,
 106                                                               GdkRectangle       *rect);
 107
 108 /*** Geometry computations ***/
 109 static void       compute_border                             (EvView             *view,
 110                                                               int                 width,
 111                                                               int                 height,
 112                                                               GtkBorder          *border);
 113 static void       get_page_y_offset                          (EvView *view,
 114                                                               int page,
 115                                                               double zoom,
 116                                                               int *y_offset);
 117 static gboolean   get_page_extents                           (EvView             *view,
 118                                                               gint                page,
 119                                                               GdkRectangle       *page_area,
 120                                                               GtkBorder          *border);
 121 static void       view_rect_to_doc_rect                      (EvView             *view,
 122                                                               GdkRectangle       *view_rect,
 123                                                               GdkRectangle       *page_area,
 124                                                               EvRectangle        *doc_rect);
 125 static void       doc_rect_to_view_rect                      (EvView             *view,
 126                                                               int                 page,
 127                                                               EvRectangle        *doc_rect,
 128                                                               GdkRectangle       *view_rect);
 129 static void       find_page_at_location                      (EvView             *view,
 130                                                               gdouble             x,
 131                                                               gdouble             y,
 132                                                               gint               *page,
 133                                                               gint               *x_offset,
 134                                                               gint               *y_offset);
 135 static gboolean  doc_point_to_view_point                     (EvView             *view,
 136                                                               int                 page,
 137                                                               EvPoint            *doc_point,
 138                                                               GdkPoint           *view_point);
 139 /*** Hyperrefs ***/
 140 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 141                                                               gdouble             x,
 142                                                               gdouble             y);
 143 static char*      tip_from_link                              (EvView             *view,
 144                                                               EvLink             *link);
 145 /*** Forms ***/
 146 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 147                                                                gdouble            x,
 148                                                                gdouble            y);
 149
 150 /*** GtkWidget implementation ***/
 151 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 152                                                               GtkRequisition     *requisition);
 153 static void       ev_view_size_request_continuous            (EvView             *view,
 154                                                               GtkRequisition     *requisition);
 155 static void       ev_view_size_request_dual_page             (EvView             *view,
 156                                                               GtkRequisition     *requisition);
 157 static void       ev_view_size_request_single_page           (EvView             *view,
 158                                                               GtkRequisition     *requisition);
 159 static void       ev_view_size_request                       (GtkWidget          *widget,
 160                                                               GtkRequisition     *requisition);
 161 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 162                                                               GtkAllocation      *allocation);
 163 static void       ev_view_realize                            (GtkWidget          *widget);
 164 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 165                                                               GdkEventScroll     *event);
 166 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 167                                                               GdkEventExpose     *event);
 168 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 169 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 170                                                               GdkEventButton     *event);
 171 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 172                                                               GdkEventMotion     *event);
 173 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 174                                                               GdkEventButton     *event);
 175 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 176                                                               GdkEventCrossing   *event);
 177 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 178                                                               GdkEventCrossing   *event);
 179 static void       ev_view_style_set                          (GtkWidget          *widget,
 180                                                               GtkStyle           *old_style);
 181 static void       ev_view_remove_all                         (EvView             *view);
 182
 183 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 184
 185 /*** Drawing ***/
 186 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 187 static void       draw_rubberband                            (GtkWidget          *widget,
 188                                                               GdkWindow          *window,
 189                                                               const GdkRectangle *rect,
 190                                                               guchar              alpha);
 191 static void       highlight_find_results                     (EvView             *view,
 192                                                               int                 page);
 193 static void       draw_one_page                              (EvView             *view,
 194                                                               gint                page,
 195                                                               cairo_t            *cr,
 196                                                               GdkRectangle       *page_area,
 197                                                               GtkBorder          *border,
 198                                                               GdkRectangle       *expose_area,
 199                                                               gboolean           *page_ready);
 200 static void       draw_loading_text                          (EvView             *view,
 201                                                               GdkRectangle       *page_area,
 202                                                               GdkRectangle       *expose_area);
 203 static void       ev_view_reload_page                        (EvView             *view,
 204                                                               gint                page,
 205                                                               GdkRegion          *region);
 206
 207 /*** Callbacks ***/
 208 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 209                                                               GdkRegion          *region,
 210                                                               EvView             *view);
 211 static void       page_changed_cb                            (EvPageCache        *page_cache,
 212                                                               int                 new_page,
 213                                                               EvView             *view);
 214 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 215                                                               EvView             *view);
 216
 217 /*** GObject ***/
 218 static void       ev_view_finalize                           (GObject            *object);
 219 static void       ev_view_destroy                            (GtkObject          *object);
 220 static void       ev_view_set_property                       (GObject            *object,
 221                                                               guint               prop_id,
 222                                                               const GValue       *value,
 223                                                               GParamSpec         *pspec);
 224 static void       ev_view_get_property                       (GObject            *object,
 225                                                               guint               prop_id,
 226                                                               GValue             *value,
 227                                                               GParamSpec         *pspec);
 228 static void       ev_view_class_init                         (EvViewClass        *class);
 229 static void       ev_view_init                               (EvView             *view);
 230
 231 /*** Zoom and sizing ***/
 232 static double   zoom_for_size_fit_width                      (int doc_width,
 233                                                               int doc_height,
 234                                                               int target_width,
 235                                                               int target_height,
 236                                                               int vsb_width);
 237 static double   zoom_for_size_fit_height                     (int doc_width,
 238                                                               int doc_height,
 239                                                               int target_width,
 240                                                               int target_height,
 241                                                               int vsb_height);
 242 static double   zoom_for_size_best_fit                       (int doc_width,
 243                                                               int doc_height,
 244                                                               int target_width,
 245                                                               int target_height,
 246                                                               int vsb_width,
 247                                                               int hsb_width);
 248 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 249                                                               int     width,
 250                                                               int     height);
 251 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 252                                                                 int     width,
 253                                                                 int     height,
 254                                                                 int     vsb_width,
 255                                                                 int     hsb_height);
 256 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 257                                                                 int     width,
 258                                                                 int     height,
 259                                                                 int     vsb_width,
 260                                                                 int     hsb_height);
 261 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 262                                                                 int     width,
 263                                                                 int     height,
 264                                                                 int     vsb_width,
 265                                                                 int     hsb_height);
 266 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 267                                                                 int     width,
 268                                                                 int     height,
 269                                                                 int     vsb_width,
 270                                                                 int     hsb_height);
 271 /*** Cursors ***/
 272 static GdkCursor* ev_view_create_invisible_cursor            (void);
 273 static void       ev_view_set_cursor                         (EvView             *view,
 274                                                               EvViewCursor        new_cursor);
 275 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 276                                                               gint x,
 277                                                               gint y);
 278
 279 /*** Find ***/
 280 static gint         ev_view_find_get_n_results               (EvView             *view,
 281                                                               gint                page);
 282 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 283                                                               gint                page,
 284                                                               gint                result);
 285 static void       jump_to_find_result                        (EvView             *view);
 286 static void       jump_to_find_page                          (EvView             *view,
 287                                                               EvViewFindDirection direction,
 288                                                               gint                shift);
 289
 290 /*** Selection ***/
 291 static void       compute_selections                         (EvView             *view,
 292                                                               EvSelectionStyle    style,
 293                                                               GdkPoint           *start,
 294                                                               GdkPoint           *stop);
 295 static void       clear_selection                            (EvView             *view);
 296 static void       clear_link_selected                        (EvView             *view);
 297 static void       selection_free                             (EvViewSelection    *selection);
 298 static char*      get_selected_text                          (EvView             *ev_view);
 299 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 300                                                               GtkSelectionData   *selection_data,
 301                                                               guint               info,
 302                                                               gpointer            data);
 303 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 304                                                               gpointer            data);
 305 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 306
 307 /*** Presentation ***/
 308 static void       ev_view_presentation_transition_start      (EvView             *ev_view);
 309 static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
 310
 311
 312 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 313
 314 static void
 315 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 316 {
 317         GdkPoint view_point;
 318
 319         if (view->document == NULL) {
 320                 return;
 321         }
 322
 323         doc_point_to_view_point (view, view->current_page, &view->pending_point, &view_point);
 324
 325         if (orientation == GTK_ORIENTATION_VERTICAL) {
 326                 view->pending_point.y = 0;
 327         } else {
 328                 view->pending_point.x = 0;
 329         }
 330
 331         if (orientation == GTK_ORIENTATION_VERTICAL) {
 332                 if (view->continuous) {
 333                         gtk_adjustment_clamp_page (view->vadjustment,
 334                                                    view_point.y - view->spacing / 2,
 335                                                    view_point.y + view->vadjustment->page_size);
 336                 } else {
 337                         gtk_adjustment_set_value (view->vadjustment,
 338                                                   CLAMP (view_point.y,
 339                                                   view->vadjustment->lower,
 340                                                   view->vadjustment->upper -
 341                                                   view->vadjustment->page_size));
 342                 }
 343         } else {
 344                 if (view->dual_page) {
 345                         gtk_adjustment_clamp_page (view->hadjustment,
 346                                                    view_point.x,
 347                                                    view_point.x + view->hadjustment->page_size);
 348                 } else {
 349                         gtk_adjustment_set_value (view->hadjustment,
 350                                                   CLAMP (view_point.x,
 351                                                   view->hadjustment->lower,
 352                                                   view->hadjustment->upper -
 353                                                   view->hadjustment->page_size));
 354                 }
 355         }
 356 }
 357
 358 static void
 359 view_set_adjustment_values (EvView         *view,
 360                             GtkOrientation  orientation)
 361 {
 362         GtkWidget *widget = GTK_WIDGET (view);
 363         GtkAdjustment *adjustment;
 364         int requisition;
 365         int allocation;
 366
 367         double factor;
 368         gint new_value;
 369
 370         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 371                 requisition = widget->requisition.width;
 372                 allocation = widget->allocation.width;
 373                 adjustment = view->hadjustment;
 374         } else {
 375                 requisition = widget->requisition.height;
 376                 allocation = widget->allocation.height;
 377                 adjustment = view->vadjustment;
 378         }
 379
 380         if (!adjustment)
 381                 return;
 382
 383         factor = 1.0;
 384         switch (view->pending_scroll) {
 385                 case SCROLL_TO_KEEP_POSITION:
 386                 case SCROLL_TO_FIND_LOCATION:
 387                         factor = (adjustment->value) / adjustment->upper;
 388                         break;
 389                 case SCROLL_TO_PAGE_POSITION:
 390                         break;
 391                 case SCROLL_TO_CENTER:
 392                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 393                         break;
 394         }
 395
 396         adjustment->page_size = allocation;
 397         adjustment->step_increment = allocation * 0.1;
 398         adjustment->page_increment = allocation * 0.9;
 399         adjustment->lower = 0;
 400         adjustment->upper = MAX (allocation, requisition);
 401
 402         /*
 403          * We add 0.5 to the values before to average out our rounding errors.
 404          */
 405         switch (view->pending_scroll) {
 406                 case SCROLL_TO_KEEP_POSITION:
 407                 case SCROLL_TO_FIND_LOCATION:
 408                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 409                         gtk_adjustment_set_value (adjustment, (int)new_value);
 410                         break;
 411                 case SCROLL_TO_PAGE_POSITION:
 412                         scroll_to_current_page (view, orientation);
 413                         break;
 414                 case SCROLL_TO_CENTER:
 415                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 416                                            0, adjustment->upper - adjustment->page_size);
 417                         gtk_adjustment_set_value (adjustment, (int)new_value);
 418                         break;
 419         }
 420
 421         gtk_adjustment_changed (adjustment);
 422 }
 423
 424 static void
 425 view_update_range_and_current_page (EvView *view)
 426 {
 427         gint current_page;
 428         gint best_current_page = -1;
 429
 430         /* Presentation trumps all other modes */
 431         if (view->presentation) {
 432                 view->start_page = view->current_page;
 433                 view->end_page = view->current_page;
 434         } else if (view->continuous) {
 435                 GdkRectangle current_area, unused, page_area;
 436                 GtkBorder border;
 437                 gboolean found = FALSE;
 438                 gint area_max = -1, area;
 439                 int i;
 440
 441                 if (!(view->vadjustment && view->hadjustment))
 442                         return;
 443
 444                 current_area.x = view->hadjustment->value;
 445                 current_area.width = view->hadjustment->upper;
 446                 current_area.y = view->vadjustment->value;
 447                 current_area.height = view->vadjustment->page_size;
 448
 449                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 450
 451                         get_page_extents (view, i, &page_area, &border);
 452
 453                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 454                                 area = unused.width * unused.height;
 455
 456                                 if (!found) {
 457                                         area_max = area;
 458                                         view->start_page = i;
 459                                         found = TRUE;
 460                                         best_current_page = i;
 461                                 }
 462                                 if (area > area_max) {
 463                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 464                                         area_max = area;
 465                                 }
 466
 467                                 view->end_page = i;
 468                         } else if (found && view->current_page <= view->end_page) {
 469                                 break;
 470                         }
 471                 }
 472
 473         } else if (view->dual_page) {
 474                 if (view->current_page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) {
 475                         view->start_page = view->current_page;
 476                         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 477                                 view->end_page = view->start_page + 1;
 478                         else
 479                                 view->end_page = view->start_page;
 480                 } else {
 481                         if (view->current_page < 1)
 482                                 view->start_page = view->current_page;
 483                         else
 484                                 view->start_page = view->current_page - 1;
 485                         view->end_page = view->current_page;
 486                 }
 487         } else {
 488                 view->start_page = view->current_page;
 489                 view->end_page = view->current_page;
 490         }
 491
 492         best_current_page = MAX (best_current_page, view->start_page);
 493         current_page = ev_page_cache_get_current_page (view->page_cache);
 494
 495         if ((current_page != best_current_page) && (view->pending_scroll == SCROLL_TO_KEEP_POSITION)) {
 496                 view->current_page = best_current_page;
 497                 ev_page_cache_set_current_page (view->page_cache, best_current_page);
 498         }
 499
 500         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 501                                         view->start_page,
 502                                         view->end_page,
 503                                         view->rotation,
 504                                         view->scale,
 505                                         view->selection_info.selections);
 506 }
 507
 508 static void
 509 set_scroll_adjustment (EvView *view,
 510                        GtkOrientation  orientation,
 511                        GtkAdjustment  *adjustment)
 512 {
 513         GtkAdjustment **to_set;
 514
 515         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 516                 to_set = &view->hadjustment;
 517         else
 518                 to_set = &view->vadjustment;
 519
 520         if (*to_set != adjustment) {
 521                 if (*to_set) {
 522                         g_signal_handlers_disconnect_by_func (*to_set,
 523                                                               (gpointer) on_adjustment_value_changed,
 524                                                               view);
 525                         g_object_unref (*to_set);
 526                 }
 527
 528                 *to_set = adjustment;
 529                 view_set_adjustment_values (view, orientation);
 530
 531                 if (*to_set) {
 532                         g_object_ref (*to_set);
 533                         g_signal_connect (*to_set, "value_changed",
 534                                           G_CALLBACK (on_adjustment_value_changed), view);
 535                 }
 536         }
 537 }
 538
 539 static void
 540 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 541                                 GtkAdjustment  *hadjustment,
 542                                 GtkAdjustment  *vadjustment)
 543 {
 544         EvView *view = EV_VIEW (layout);
 545
 546         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 547         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 548
 549         on_adjustment_value_changed (NULL, view);
 550 }
 551
 552 static void
 553 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 554                            guint           keyval,
 555                            GdkModifierType modifiers,
 556                            GtkScrollType   scroll,
 557                            gboolean        horizontal)
 558 {
 559   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 560
 561   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 562                                 "binding_activated", 2,
 563                                 GTK_TYPE_SCROLL_TYPE, scroll,
 564                                 G_TYPE_BOOLEAN, horizontal);
 565   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 566                                 "binding_activated", 2,
 567                                 GTK_TYPE_SCROLL_TYPE, scroll,
 568                                 G_TYPE_BOOLEAN, horizontal);
 569 }
 570
 571 void
 572 ev_view_scroll (EvView        *view,
 573                 GtkScrollType  scroll,
 574                 gboolean       horizontal)
 575 {
 576         GtkAdjustment *adjustment;
 577         double value, increment;
 578         gboolean first_page = FALSE;
 579         gboolean last_page = FALSE;
 580
 581         view->jump_to_find_result = FALSE;
 582
 583         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 584                 switch (scroll) {
 585                         case GTK_SCROLL_PAGE_BACKWARD:
 586                         case GTK_SCROLL_STEP_BACKWARD:
 587                                 ev_view_previous_page (view);
 588                                 break;
 589                         case GTK_SCROLL_PAGE_FORWARD:
 590                         case GTK_SCROLL_STEP_FORWARD:
 591                                 ev_view_next_page (view);
 592                                 break;
 593                         default:
 594                                 break;
 595                 }
 596                 return;
 597         }
 598
 599         /* Assign values for increment and vertical adjustment */
 600         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 601         increment = adjustment->page_size * 0.75;
 602         value = adjustment->value;
 603
 604         /* Assign boolean for first and last page */
 605         if (view->current_page == 0)
 606                 first_page = TRUE;
 607         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 608                 last_page = TRUE;
 609
 610         switch (scroll) {
 611                 case GTK_SCROLL_PAGE_BACKWARD:
 612                         /* Do not jump backwards if at the first page */
 613                         if (value == (adjustment->lower) && first_page) {
 614                                 /* Do nothing */
 615                                 /* At the top of a page, assign the upper bound limit of previous page */
 616                         } else if (value == (adjustment->lower)) {
 617                                 value = adjustment->upper - adjustment->page_size;
 618                                 ev_view_previous_page (view);
 619                                 /* Jump to the top */
 620                         } else {
 621                                 value = MAX (value - increment, adjustment->lower);
 622                         }
 623                         break;
 624                 case GTK_SCROLL_PAGE_FORWARD:
 625                         /* Do not jump forward if at the last page */
 626                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 627                                 /* Do nothing */
 628                         /* At the bottom of a page, assign the lower bound limit of next page */
 629                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 630                                 value = 0;
 631                                 ev_view_next_page (view);
 632                         /* Jump to the bottom */
 633                         } else {
 634                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 635                         }
 636                         break;
 637                 case GTK_SCROLL_STEP_BACKWARD:
 638                         value -= adjustment->step_increment;
 639                         break;
 640                 case GTK_SCROLL_STEP_FORWARD:
 641                         value += adjustment->step_increment;
 642                         break;
 643                 case GTK_SCROLL_STEP_DOWN:
 644                         value -= adjustment->step_increment / 10;
 645                         break;
 646                 case GTK_SCROLL_STEP_UP:
 647                         value += adjustment->step_increment / 10;
 648                         break;
 649                 default:
 650                         break;
 651         }
 652
 653         value = CLAMP (value, adjustment->lower,
 654                        adjustment->upper - adjustment->page_size);
 655
 656         gtk_adjustment_set_value (adjustment, value);
 657 }
 658
 659 #define MARGIN 5
 660
 661 static void
 662 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 663 {
 664         GtkWidget *widget = GTK_WIDGET (view);
 665         GtkAdjustment *adjustment;
 666         int value;
 667
 668         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 669
 670         adjustment = view->vadjustment;
 671
 672         if (rect->y < adjustment->value) {
 673                 value = MAX (adjustment->lower, rect->y - MARGIN);
 674                 gtk_adjustment_set_value (view->vadjustment, value);
 675         } else if (rect->y + rect->height >
 676                    adjustment->value + widget->allocation.height) {
 677                 value = MIN (adjustment->upper, rect->y + rect->height -
 678                              widget->allocation.height + MARGIN);
 679                 gtk_adjustment_set_value (view->vadjustment, value);
 680         }
 681
 682         adjustment = view->hadjustment;
 683
 684         if (rect->x < adjustment->value) {
 685                 value = MAX (adjustment->lower, rect->x - MARGIN);
 686                 gtk_adjustment_set_value (view->hadjustment, value);
 687         } else if (rect->x + rect->height >
 688                    adjustment->value + widget->allocation.width) {
 689                 value = MIN (adjustment->upper, rect->x + rect->width -
 690                              widget->allocation.width + MARGIN);
 691                 gtk_adjustment_set_value (view->hadjustment, value);
 692         }
 693
 694         gtk_widget_queue_resize (GTK_WIDGET (view));
 695 }
 696
 697 /*** Geometry computations ***/
 698
 699 static void
 700 compute_border (EvView *view, int width, int height, GtkBorder *border)
 701 {
 702         if (view->presentation) {
 703                 border->left = 0;
 704                 border->right = 0;
 705                 border->top = 0;
 706                 border->bottom = 0;
 707         } else {
 708                 ev_document_misc_get_page_border_size (width, height, border);
 709         }
 710 }
 711
 712 static void
 713 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 714 {
 715         int max_width, offset;
 716         GtkBorder border;
 717
 718         g_return_if_fail (y_offset != NULL);
 719
 720         ev_page_cache_get_max_width (view->page_cache, view->rotation, zoom, &max_width);
 721
 722         compute_border (view, max_width, max_width, &border);
 723
 724         if (view->dual_page) {
 725                 ev_page_cache_get_height_to_page (view->page_cache, page,
 726                                                   view->rotation, zoom, NULL, &offset);
 727                 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);
 728         } else {
 729                 ev_page_cache_get_height_to_page (view->page_cache, page,
 730                                                   view->rotation, zoom, &offset, NULL);
 731                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 732         }
 733
 734         *y_offset = offset;
 735         return;
 736 }
 737
 738 static gboolean
 739 get_page_extents (EvView       *view,
 740                   gint          page,
 741                   GdkRectangle *page_area,
 742                   GtkBorder    *border)
 743 {
 744         GtkWidget *widget;
 745         int width, height;
 746
 747         widget = GTK_WIDGET (view);
 748
 749         /* Get the size of the page */
 750         ev_page_cache_get_size (view->page_cache, page,
 751                                 view->rotation,
 752                                 view->scale,
 753                                 &width, &height);
 754         compute_border (view, width, height, border);
 755         page_area->width = width + border->left + border->right;
 756         page_area->height = height + border->top + border->bottom;
 757
 758         if (view->presentation) {
 759                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 760                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 761         } else if (view->continuous) {
 762                 gint max_width;
 763                 gint x, y;
 764
 765                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 766                                              view->scale, &max_width);
 767                 max_width = max_width + border->left + border->right;
 768                 /* Get the location of the bounding box */
 769                 if (view->dual_page) {
 770                         x = view->spacing + ((page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? 0 : 1) * (max_width + view->spacing);
 771                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 772                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 773                                 x = x + (max_width - width - border->left - border->right);
 774                 } else {
 775                         x = view->spacing;
 776                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 777                 }
 778
 779                 get_page_y_offset (view, page, view->scale, &y);
 780
 781                 page_area->x = x;
 782                 page_area->y = y;
 783         } else {
 784                 gint x, y;
 785                 if (view->dual_page) {
 786                         gint width_2, height_2;
 787                         gint max_width = width;
 788                         gint max_height = height;
 789                         GtkBorder overall_border;
 790                         gint other_page;
 791
 792                         other_page = (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? page + 1: page - 1;
 793
 794                         /* First, we get the bounding box of the two pages */
 795                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)
 796                             && (0 <= other_page)) {
 797                                 ev_page_cache_get_size (view->page_cache,
 798                                                         other_page,
 799                                                         view->rotation,
 800                                                         view->scale,
 801                                                         &width_2, &height_2);
 802                                 if (width_2 > width)
 803                                         max_width = width_2;
 804                                 if (height_2 > height)
 805                                         max_height = height_2;
 806                         }
 807                         compute_border (view, max_width, max_height, &overall_border);
 808
 809                         /* Find the offsets */
 810                         x = view->spacing;
 811                         y = view->spacing;
 812
 813                         /* Adjust for being the left or right page */
 814                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 815                                 x = x + max_width - width;
 816                         else
 817                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 818
 819                         y = y + (max_height - height)/2;
 820
 821                         /* Adjust for extra allocation */
 822                         x = x + MAX (0, widget->allocation.width -
 823                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 824                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 825                 } else {
 826                         x = view->spacing;
 827                         y = view->spacing;
 828
 829                         /* Adjust for extra allocation */
 830                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 831                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 832                 }
 833
 834                 page_area->x = x;
 835                 page_area->y = y;
 836         }
 837
 838         return TRUE;
 839 }
 840
 841 static void
 842 view_point_to_doc_point (EvView *view,
 843                          GdkPoint *view_point,
 844                          GdkRectangle *page_area,
 845                          double  *doc_point_x,
 846                          double  *doc_point_y)
 847 {
 848         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 849         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 850 }
 851
 852 static void
 853 view_rect_to_doc_rect (EvView *view,
 854                        GdkRectangle *view_rect,
 855                        GdkRectangle *page_area,
 856                        EvRectangle  *doc_rect)
 857 {
 858         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 859         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 860         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 861         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 862 }
 863
 864 static gboolean
 865 doc_point_to_view_point (EvView       *view,
 866                          int           page,
 867                          EvPoint      *doc_point,
 868                          GdkPoint     *view_point)
 869 {
 870         GdkRectangle page_area;
 871         GtkBorder border;
 872         double x, y, view_x, view_y;
 873         int width, height;
 874
 875         ev_page_cache_get_size (view->page_cache, page,
 876                                 view->rotation,
 877                                 1.0,
 878                                 &width, &height);
 879
 880         if (view->rotation == 0) {
 881                 x = doc_point->x;
 882                 y = doc_point->y;
 883         } else if (view->rotation == 90) {
 884                 x = width - doc_point->y;
 885                 y = doc_point->x;
 886         } else if (view->rotation == 180) {
 887                 x = width - doc_point->x;
 888                 y = height - doc_point->y;
 889         } else if (view->rotation == 270) {
 890                 x = doc_point->y;
 891                 y = height - doc_point->x;
 892         } else {
 893                 g_assert_not_reached ();
 894         }
 895
 896         get_page_extents (view, page, &page_area, &border);
 897
 898         view_x = x * view->scale;
 899         view_y = y * view->scale;
 900         view_point->x = view_x + page_area.x;
 901         view_point->y = view_y + page_area.y;
 902
 903         return (view_x > 0 && view_x <= page_area.width &&
 904                 view_y > 0 && view_y <= page_area.height);
 905 }
 906
 907 static void
 908 doc_rect_to_view_rect (EvView       *view,
 909                        int           page,
 910                        EvRectangle  *doc_rect,
 911                        GdkRectangle *view_rect)
 912 {
 913         GdkRectangle page_area;
 914         GtkBorder border;
 915         double x, y, w, h;
 916         int width, height;
 917
 918         ev_page_cache_get_size (view->page_cache, page,
 919                                 view->rotation,
 920                                 1.0,
 921                                 &width, &height);
 922
 923         if (view->rotation == 0) {
 924                 x = doc_rect->x1;
 925                 y = doc_rect->y1;
 926                 w = doc_rect->x2 - doc_rect->x1;
 927                 h = doc_rect->y2 - doc_rect->y1;
 928         } else if (view->rotation == 90) {
 929                 x = width - doc_rect->y2;
 930                 y = doc_rect->x1;
 931                 w = doc_rect->y2 - doc_rect->y1;
 932                 h = doc_rect->x2 - doc_rect->x1;
 933         } else if (view->rotation == 180) {
 934                 x = width - doc_rect->x2;
 935                 y = height - doc_rect->y2;
 936                 w = doc_rect->x2 - doc_rect->x1;
 937                 h = doc_rect->y2 - doc_rect->y1;
 938         } else if (view->rotation == 270) {
 939                 x = doc_rect->y1;
 940                 y = height - doc_rect->x2;
 941                 w = doc_rect->y2 - doc_rect->y1;
 942                 h = doc_rect->x2 - doc_rect->x1;
 943         } else {
 944                 g_assert_not_reached ();
 945         }
 946
 947         get_page_extents (view, page, &page_area, &border);
 948
 949         view_rect->x = x * view->scale + page_area.x;
 950         view_rect->y = y * view->scale + page_area.y;
 951         view_rect->width = w * view->scale;
 952         view_rect->height = h * view->scale;
 953 }
 954
 955 static void
 956 find_page_at_location (EvView  *view,
 957                        gdouble  x,
 958                        gdouble  y,
 959                        gint    *page,
 960                        gint    *x_offset,
 961                        gint    *y_offset)
 962 {
 963         int i;
 964
 965         if (view->document == NULL)
 966                 return;
 967
 968         g_assert (page);
 969         g_assert (x_offset);
 970         g_assert (y_offset);
 971
 972         for (i = view->start_page; i <= view->end_page; i++) {
 973                 GdkRectangle page_area;
 974                 GtkBorder border;
 975
 976                 if (! get_page_extents (view, i, &page_area, &border))
 977                         continue;
 978
 979                 if ((x >= page_area.x + border.left) &&
 980                     (x < page_area.x + page_area.width - border.right) &&
 981                     (y >= page_area.y + border.top) &&
 982                     (y < page_area.y + page_area.height - border.bottom)) {
 983                         *page = i;
 984                         *x_offset = x - (page_area.x + border.left);
 985                         *y_offset = y - (page_area.y + border.top);
 986                         return;
 987                 }
 988         }
 989
 990         *page = -1;
 991 }
 992
 993 static gboolean
 994 location_in_text (EvView  *view,
 995                   gdouble  x,
 996                   gdouble  y)
 997 {
 998         GdkRegion *region;
 999         gint page = -1;
1000         gint x_offset = 0, y_offset = 0;
1001
1002         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1003
1004         if (page == -1)
1005                 return FALSE;
1006
1007         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1008
1009         if (region)
1010                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1011         else
1012                 return FALSE;
1013 }
1014
1015 static int
1016 ev_view_get_width (EvView *view)
1017 {
1018         return GTK_WIDGET (view)->allocation.width;
1019 }
1020
1021 static int
1022 ev_view_get_height (EvView *view)
1023 {
1024         return GTK_WIDGET (view)->allocation.height;
1025 }
1026
1027 static gboolean
1028 location_in_selected_text (EvView  *view,
1029                            gdouble  x,
1030                            gdouble  y)
1031 {
1032         gint page = -1;
1033         gint x_offset = 0, y_offset = 0;
1034         EvViewSelection *selection;
1035         GList *l = NULL;
1036
1037         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1038                 selection = (EvViewSelection *)l->data;
1039
1040                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1041
1042                 if (page != selection->page)
1043                         continue;
1044
1045                 if (selection->covered_region &&
1046                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1047                         return TRUE;
1048         }
1049
1050         return FALSE;
1051 }
1052
1053 static gboolean
1054 get_doc_point_from_offset (EvView *view,
1055                            gint    page,
1056                            gint    x_offset,
1057                            gint    y_offset,
1058                            gint   *x_new,
1059                            gint   *y_new)
1060 {
1061         int width, height;
1062         double x, y;
1063
1064         ev_page_cache_get_size (view->page_cache, page,
1065                                 view->rotation,
1066                                 1.0,
1067                                 &width, &height);
1068
1069         x_offset = x_offset / view->scale;
1070         y_offset = y_offset / view->scale;
1071
1072         if (view->rotation == 0) {
1073                 x = x_offset;
1074                 y = y_offset;
1075         } else if (view->rotation == 90) {
1076                 x = y_offset;
1077                 y = width - x_offset;
1078         } else if (view->rotation == 180) {
1079                 x = width - x_offset;
1080                 y = height - y_offset;
1081         } else if (view->rotation == 270) {
1082                 x = height - y_offset;
1083                 y = x_offset;
1084         } else {
1085                 g_assert_not_reached ();
1086         }
1087
1088         *x_new = x;
1089         *y_new = y;
1090
1091         return TRUE;
1092 }
1093
1094 /*** Hyperref ***/
1095 static EvLink *
1096 ev_view_get_link_at_location (EvView  *view,
1097                               gdouble  x,
1098                               gdouble  y)
1099 {
1100         gint page = -1;
1101         gint x_offset = 0, y_offset = 0;
1102         gint x_new = 0, y_new = 0;
1103         GList *link_mapping;
1104
1105         if (!EV_IS_DOCUMENT_LINKS (view->document))
1106                 return NULL;
1107
1108         x += view->scroll_x;
1109         y += view->scroll_y;
1110
1111         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1112
1113         if (page == -1)
1114                 return NULL;
1115
1116
1117         if (get_doc_point_from_offset (view, page, x_offset,
1118                                        y_offset, &x_new, &y_new) == FALSE)
1119                 return NULL;
1120
1121         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1122
1123         if (link_mapping)
1124                 return ev_link_mapping_find (link_mapping, x_new, y_new);
1125         else
1126                 return NULL;
1127 }
1128
1129 static void
1130 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1131 {
1132         EvPoint doc_point;
1133         gdouble zoom, left, top;
1134         gboolean change_left, change_top;
1135
1136         left = ev_link_dest_get_left (dest, &change_left);
1137         top = ev_link_dest_get_top (dest, &change_top);
1138
1139         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1140                                        ev_link_dest_get_bottom (dest) - top,
1141                                        ev_view_get_width (view),
1142                                        ev_view_get_height (view), 0, 0);
1143
1144         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1145         ev_view_set_zoom (view, zoom, FALSE);
1146
1147         doc_point.x = change_left ? left : 0;
1148         doc_point.y = change_top ? top : 0;
1149
1150         view->current_page = ev_link_dest_get_page (dest);
1151         if (change_left || change_top)
1152                 view->pending_point = doc_point;
1153         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1154
1155         gtk_widget_queue_resize (GTK_WIDGET (view));
1156 }
1157
1158 static void
1159 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1160 {
1161         EvPoint doc_point;
1162         int doc_width, doc_height, page;
1163         double zoom, left;
1164         gboolean change_left;
1165
1166         page = ev_link_dest_get_page (dest);
1167         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1168
1169         left = ev_link_dest_get_left (dest, &change_left);
1170         doc_point.x = change_left ? left : 0;
1171         doc_point.y = 0;
1172
1173         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1174                                          ev_view_get_width (view),
1175                                          ev_view_get_height (view), 0);
1176
1177         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1178         ev_view_set_zoom (view, zoom, FALSE);
1179
1180         view->current_page = page;
1181         if (change_left)
1182                 view->pending_point = doc_point;
1183         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1184
1185         gtk_widget_queue_resize (GTK_WIDGET (view));
1186 }
1187
1188 static void
1189 goto_fith_dest (EvView *view, EvLinkDest *dest)
1190 {
1191         EvPoint doc_point;
1192         int doc_width, doc_height, page;
1193         gdouble zoom, top;
1194         gboolean change_top;
1195
1196         page = ev_link_dest_get_page (dest);
1197         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1198
1199         top = ev_link_dest_get_top (dest, &change_top);
1200
1201         doc_point.x = 0;
1202         doc_point.y = change_top ? top : 0;
1203
1204         zoom = zoom_for_size_fit_width (doc_width, top,
1205                                         ev_view_get_width (view),
1206                                         ev_view_get_height (view), 0);
1207
1208         ev_view_set_sizing_mode (view, EV_SIZING_FIT_WIDTH);
1209         ev_view_set_zoom (view, zoom, FALSE);
1210
1211         view->current_page = page;
1212         if (change_top)
1213                 view->pending_point = doc_point;
1214         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1215
1216         gtk_widget_queue_resize (GTK_WIDGET (view));
1217 }
1218
1219 static void
1220 goto_fit_dest (EvView *view, EvLinkDest *dest)
1221 {
1222         double zoom;
1223         int doc_width, doc_height;
1224         int page;
1225
1226         page = ev_link_dest_get_page (dest);
1227         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1228
1229         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1230                                        ev_view_get_height (view), 0, 0);
1231
1232         ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
1233         ev_view_set_zoom (view, zoom, FALSE);
1234
1235         view->current_page = page;
1236         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1237
1238         gtk_widget_queue_resize (GTK_WIDGET (view));
1239 }
1240
1241 static void
1242 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1243 {
1244         EvPoint doc_point;
1245         gint page;
1246         gdouble zoom, left, top;
1247         gboolean change_zoom, change_left, change_top;
1248
1249         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1250         page = ev_link_dest_get_page (dest);
1251
1252         if (change_zoom && zoom > 1) {
1253                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1254                 ev_view_set_zoom (view, zoom, FALSE);
1255         }
1256
1257         left = ev_link_dest_get_left (dest, &change_left);
1258         top = ev_link_dest_get_top (dest, &change_top);
1259
1260         doc_point.x = change_left ? left : 0;
1261         doc_point.y = change_top ? top : 0;
1262
1263         view->current_page = page;
1264         if (change_left || change_top)
1265                 view->pending_point = doc_point;
1266         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1267
1268         gtk_widget_queue_resize (GTK_WIDGET (view));
1269 }
1270
1271 static void
1272 goto_dest (EvView *view, EvLinkDest *dest)
1273 {
1274         EvLinkDestType type;
1275         int page, n_pages, current_page;
1276
1277         page = ev_link_dest_get_page (dest);
1278         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1279
1280         if (page < 0 || page >= n_pages)
1281                 return;
1282
1283         current_page = view->current_page;
1284
1285         type = ev_link_dest_get_dest_type (dest);
1286
1287         switch (type) {
1288                 case EV_LINK_DEST_TYPE_PAGE:
1289                         ev_page_cache_set_current_page (view->page_cache, page);
1290                         break;
1291                 case EV_LINK_DEST_TYPE_FIT:
1292                         goto_fit_dest (view, dest);
1293                         break;
1294                 case EV_LINK_DEST_TYPE_FITH:
1295                         goto_fith_dest (view, dest);
1296                         break;
1297                 case EV_LINK_DEST_TYPE_FITV:
1298                         goto_fitv_dest (view, dest);
1299                         break;
1300                 case EV_LINK_DEST_TYPE_FITR:
1301                         goto_fitr_dest (view, dest);
1302                         break;
1303                 case EV_LINK_DEST_TYPE_XYZ:
1304                         goto_xyz_dest (view, dest);
1305                         break;
1306                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1307                         ev_page_cache_set_page_label (view->page_cache, ev_link_dest_get_page_label (dest));
1308                         break;
1309                 default:
1310                         g_assert_not_reached ();
1311         }
1312
1313         if (current_page != view->current_page)
1314                 ev_page_cache_set_current_page (view->page_cache,
1315                                                 view->current_page);
1316 }
1317
1318 static void
1319 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1320 {
1321         EvLinkDestType type;
1322
1323         type = ev_link_dest_get_dest_type (dest);
1324
1325         if (type == EV_LINK_DEST_TYPE_NAMED) {
1326                 EvLinkDest  *dest2;
1327                 const gchar *named_dest;
1328
1329                 named_dest = ev_link_dest_get_named_dest (dest);
1330                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1331                                                           named_dest);
1332                 if (dest2) {
1333                         goto_dest (view, dest2);
1334                         g_object_unref (dest2);
1335                 }
1336
1337                 return;
1338         }
1339
1340         goto_dest (view, dest);
1341 }
1342
1343 void
1344 ev_view_handle_link (EvView *view, EvLink *link)
1345 {
1346         EvLinkAction    *action = NULL;
1347         EvLinkActionType type;
1348
1349         action = ev_link_get_action (link);
1350         if (!action)
1351                 return;
1352
1353         type = ev_link_action_get_action_type (action);
1354
1355         switch (type) {
1356                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1357                         EvLinkDest *dest;
1358
1359                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1360
1361                         dest = ev_link_action_get_dest (action);
1362                         ev_view_goto_dest (view, dest);
1363                 }
1364                         break;
1365                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1366                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1367                 case EV_LINK_ACTION_TYPE_LAUNCH:
1368                 case EV_LINK_ACTION_TYPE_NAMED:
1369                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1370                         break;
1371         }
1372 }
1373
1374 gchar *
1375 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1376 {
1377         EvLinkDestType type;
1378         gchar *msg = NULL;
1379
1380         type = ev_link_dest_get_dest_type (dest);
1381
1382         switch (type) {
1383                 case EV_LINK_DEST_TYPE_NAMED: {
1384                         EvLinkDest  *dest2;
1385                         const gchar *named_dest;
1386
1387                         named_dest = ev_link_dest_get_named_dest (dest);
1388                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1389                                                                   named_dest);
1390                         if (dest2) {
1391                                 msg = ev_page_cache_get_page_label (view->page_cache,
1392                                                                     ev_link_dest_get_page (dest2));
1393                                 g_object_unref (dest2);
1394                         }
1395                 }
1396
1397                         break;
1398                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1399                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1400                 }
1401                         break;
1402                 default:
1403                         msg = ev_page_cache_get_page_label (view->page_cache,
1404                                                             ev_link_dest_get_page (dest));
1405         }
1406
1407         return msg;
1408 }
1409
1410 static char *
1411 tip_from_action_named (EvLinkAction *action)
1412 {
1413         const gchar *name = ev_link_action_get_name (action);
1414
1415         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1416                 return g_strdup (_("Go to first page"));
1417         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1418                 return g_strdup (_("Go to previous page"));
1419         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1420                 return g_strdup (_("Go to next page"));
1421         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1422                 return g_strdup (_("Go to last page"));
1423         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1424                 return g_strdup (_("Go to page"));
1425         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1426                 return g_strdup (_("Find"));
1427         }
1428
1429         return NULL;
1430 }
1431
1432 static char *
1433 tip_from_link (EvView *view, EvLink *link)
1434 {
1435         EvLinkAction *action;
1436         EvLinkActionType type;
1437         char *msg = NULL;
1438         char *page_label;
1439         const char *title;
1440
1441         action = ev_link_get_action (link);
1442         title = ev_link_get_title (link);
1443
1444         if (!action)
1445                 return title ? g_strdup (title) : NULL;
1446
1447         type = ev_link_action_get_action_type (action);
1448
1449         switch (type) {
1450                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1451                         page_label = ev_view_page_label_from_dest (view,
1452                                                                    ev_link_action_get_dest (action));
1453                         if (page_label) {
1454                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1455                                 g_free (page_label);
1456                         }
1457                         break;
1458                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1459                         if (title) {
1460                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1461                                                        ev_link_action_get_filename (action));
1462                         } else {
1463                                 msg = g_strdup_printf (_("Go to file “%s”"),
1464                                                        ev_link_action_get_filename (action));
1465                         }
1466                         break;
1467                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1468                         msg = g_strdup (ev_link_action_get_uri (action));
1469                         break;
1470                 case EV_LINK_ACTION_TYPE_LAUNCH:
1471                         msg = g_strdup_printf (_("Launch %s"),
1472                                                ev_link_action_get_filename (action));
1473                         break;
1474                 case EV_LINK_ACTION_TYPE_NAMED:
1475                         msg = tip_from_action_named (action);
1476                         break;
1477                 default:
1478                         if (title)
1479                                 msg = g_strdup (title);
1480                         break;
1481         }
1482
1483         return msg;
1484 }
1485
1486 static void
1487 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1488 {
1489         EvLink      *link;
1490         EvFormField *field;
1491
1492         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1493                 return;
1494
1495         if (view->drag_info.in_drag) {
1496                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1497                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1498                 return;
1499         }
1500
1501         if (view->scroll_info.autoscrolling) {
1502                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1503                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1504                 return;
1505         }
1506
1507         link = ev_view_get_link_at_location (view, x, y);
1508         if (link) {
1509                 g_object_set (view, "has-tooltip", TRUE, NULL);
1510                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1511         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1512                 if (field->is_read_only) {
1513                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1514                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1515                             view->cursor == EV_VIEW_CURSOR_DRAG)
1516                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1517                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1518                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1519                 } else {
1520                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1521                 }
1522         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1523                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1524         } else {
1525                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1526                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1527                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1528                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1529                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1530         }
1531 }
1532
1533 /*** Images ***/
1534 static EvImage *
1535 ev_view_get_image_at_location (EvView  *view,
1536                                gdouble  x,
1537                                gdouble  y)
1538 {
1539         gint page = -1;
1540         gint x_offset = 0, y_offset = 0;
1541         gint x_new = 0, y_new = 0;
1542         GList *image_mapping;
1543
1544         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1545                 return NULL;
1546
1547         x += view->scroll_x;
1548         y += view->scroll_y;
1549
1550         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1551
1552         if (page == -1)
1553                 return NULL;
1554
1555         if (get_doc_point_from_offset (view, page, x_offset,
1556                                        y_offset, &x_new, &y_new) == FALSE)
1557                 return NULL;
1558
1559         image_mapping = ev_pixbuf_cache_get_image_mapping (view->pixbuf_cache, page);
1560
1561         if (image_mapping)
1562                 return ev_image_mapping_find (image_mapping, x_new, y_new);
1563         else
1564                 return NULL;
1565 }
1566
1567 /*** Forms ***/
1568 static EvFormField *
1569 ev_view_get_form_field_at_location (EvView  *view,
1570                                     gdouble  x,
1571                                     gdouble  y)
1572 {
1573         gint page = -1;
1574         gint x_offset = 0, y_offset = 0;
1575         gint x_new = 0, y_new = 0;
1576         GList *forms_mapping;
1577
1578         if (!EV_IS_DOCUMENT_FORMS (view->document))
1579                 return NULL;
1580
1581         x += view->scroll_x;
1582         y += view->scroll_y;
1583
1584         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1585
1586         if (page == -1)
1587                 return NULL;
1588
1589         if (get_doc_point_from_offset (view, page, x_offset,
1590                                        y_offset, &x_new, &y_new) == FALSE)
1591                 return NULL;
1592
1593         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, page);
1594
1595         if (forms_mapping)
1596                 return ev_form_field_mapping_find (forms_mapping, x_new, y_new);
1597         else
1598                 return NULL;
1599 }
1600
1601 static GdkRegion *
1602 ev_view_form_field_get_region (EvView      *view,
1603                                EvFormField *field)
1604 {
1605         EvRectangle  field_area;
1606         GdkRectangle view_area;
1607         GList       *forms_mapping;
1608
1609         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1610                                                                 field->page->index);
1611         ev_form_field_mapping_get_area (forms_mapping, field, &field_area);
1612         doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
1613         view_area.x -= view->scroll_x;
1614         view_area.y -= view->scroll_y;
1615
1616         return gdk_region_rectangle (&view_area);
1617 }
1618
1619 static gboolean
1620 ev_view_forms_remove_widgets (EvView *view)
1621 {
1622         ev_view_remove_all (view);
1623
1624         return FALSE;
1625 }
1626
1627 static void
1628 ev_view_form_field_destroy (GtkWidget *widget,
1629                             EvView    *view)
1630 {
1631         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1632 }
1633
1634 static GtkWidget *
1635 ev_view_form_field_button_create_widget (EvView      *view,
1636                                          EvFormField *field)
1637 {
1638         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1639         GdkRegion         *field_region = NULL;
1640
1641         switch (field_button->type) {
1642                 case EV_FORM_FIELD_BUTTON_PUSH:
1643                         return NULL;
1644                 case EV_FORM_FIELD_BUTTON_CHECK:
1645                 case EV_FORM_FIELD_BUTTON_RADIO: {
1646                         gboolean  state;
1647                         GList    *forms_mapping, *l;
1648
1649                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1650                                                                                field);
1651
1652                         /* FIXME: it actually depends on NoToggleToOff flags */
1653                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1654                             state && field_button->state)
1655                                 return NULL;
1656
1657                         field_region = ev_view_form_field_get_region (view, field);
1658
1659                         /* For radio buttons and checkbox buttons that are in a set
1660                          * we need to update also the region for the current selected item
1661                          */
1662                         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1663                                                                                 field->page->index);
1664                         for (l = forms_mapping; l; l = g_list_next (l)) {
1665                                 EvFormField *button = ((EvFormFieldMapping *)(l->data))->field;
1666                                 GdkRegion   *button_region;
1667
1668                                 if (button->id == field->id)
1669                                         continue;
1670
1671                                 /* FIXME: only buttons in the same group should be updated */
1672                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1673                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1674                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1675                                         continue;
1676
1677                                 button_region = ev_view_form_field_get_region (view, button);
1678                                 gdk_region_union (field_region, button_region);
1679                                 gdk_region_destroy (button_region);
1680                         }
1681
1682                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
1683                                                                        field, !state);
1684                         field_button->state = !state;
1685                 }
1686                         break;
1687         }
1688
1689         ev_view_reload_page (view, field->page->index, field_region);
1690         gdk_region_destroy (field_region);
1691
1692         return NULL;
1693 }
1694
1695 static void
1696 ev_view_form_field_text_save (EvView    *view,
1697                               GtkWidget *widget)
1698 {
1699         EvFormField *field;
1700
1701         if (!view->document)
1702                 return;
1703
1704         field = g_object_get_data (G_OBJECT (widget), "form-field");
1705
1706         if (field->changed) {
1707                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1708                 GdkRegion       *field_region;
1709
1710                 field_region = ev_view_form_field_get_region (view, field);
1711
1712                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
1713                                                             field, field_text->text);
1714                 field->changed = FALSE;
1715                 ev_view_reload_page (view, field->page->index, field_region);
1716                 gdk_region_destroy (field_region);
1717         }
1718 }
1719
1720 static void
1721 ev_view_form_field_text_changed (GtkWidget   *widget,
1722                                  EvFormField *field)
1723 {
1724         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1725         gchar           *text = NULL;
1726
1727         if (GTK_IS_ENTRY (widget)) {
1728                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
1729         } else if (GTK_IS_TEXT_BUFFER (widget)) {
1730                 GtkTextIter start, end;
1731
1732                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
1733                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
1734                                                  &start, &end, FALSE);
1735         }
1736
1737         if (!field_text->text ||
1738             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
1739                 g_free (field_text->text);
1740                 field_text->text = text;
1741                 field->changed = TRUE;
1742         }
1743 }
1744
1745 static GtkWidget *
1746 ev_view_form_field_text_create_widget (EvView      *view,
1747                                        EvFormField *field)
1748 {
1749         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1750         GtkWidget       *text = NULL;
1751         gchar           *txt;
1752
1753         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
1754                                                           field);
1755
1756         switch (field_text->type) {
1757                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
1758                         /* TODO */
1759                 case EV_FORM_FIELD_TEXT_NORMAL:
1760                         text = gtk_entry_new ();
1761                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
1762                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
1763                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
1764
1765                         if (txt) {
1766                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
1767                                 g_free (txt);
1768                         }
1769
1770                         g_signal_connect (text, "changed",
1771                                           G_CALLBACK (ev_view_form_field_text_changed),
1772                                           field);
1773                         g_signal_connect_after (text, "activate",
1774                                                 G_CALLBACK (ev_view_form_field_destroy),
1775                                                 view);
1776                         break;
1777                 case EV_FORM_FIELD_TEXT_MULTILINE: {
1778                         GtkTextBuffer *buffer;
1779
1780                         text = gtk_text_view_new ();
1781                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
1782
1783                         if (txt) {
1784                                 gtk_text_buffer_set_text (buffer, txt, -1);
1785                                 g_free (txt);
1786                         }
1787
1788                         g_signal_connect (buffer, "changed",
1789                                           G_CALLBACK (ev_view_form_field_text_changed),
1790                                           field);
1791                 }
1792                         break;
1793         }
1794
1795         g_object_weak_ref (G_OBJECT (text),
1796                            (GWeakNotify)ev_view_form_field_text_save,
1797                            view);
1798
1799         return text;
1800 }
1801
1802 static void
1803 ev_view_form_field_choice_save (EvView    *view,
1804                                 GtkWidget *widget)
1805 {
1806         EvFormField *field;
1807
1808         if (!view->document)
1809                 return;
1810
1811         field = g_object_get_data (G_OBJECT (widget), "form-field");
1812
1813         if (field->changed) {
1814                 GList             *l;
1815                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1816                 GdkRegion         *field_region;
1817
1818                 field_region = ev_view_form_field_get_region (view, field);
1819
1820                 if (field_choice->is_editable) {
1821                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
1822                                                                       field, field_choice->text);
1823                 } else {
1824                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
1825                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
1826                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
1827                                                                                  field,
1828                                                                                  GPOINTER_TO_INT (l->data));
1829                         }
1830                 }
1831                 field->changed = FALSE;
1832                 ev_view_reload_page (view, field->page->index, field_region);
1833                 gdk_region_destroy (field_region);
1834         }
1835 }
1836
1837 static void
1838 ev_view_form_field_choice_changed (GtkWidget   *widget,
1839                                    EvFormField *field)
1840 {
1841         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1842
1843         if (GTK_IS_COMBO_BOX (widget)) {
1844                 gint item;
1845
1846                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
1847                 if (!field_choice->selected_items ||
1848                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
1849                         g_list_free (field_choice->selected_items);
1850                         field_choice->selected_items = NULL;
1851                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1852                                                                        GINT_TO_POINTER (item));
1853                         field->changed = TRUE;
1854                 }
1855
1856                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
1857                         gchar *text;
1858
1859                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
1860                         if (!field_choice->text ||
1861                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
1862                                 g_free (field_choice->text);
1863                                 field_choice->text = text;
1864                                 field->changed = TRUE;
1865                         }
1866                 }
1867         } else if (GTK_IS_TREE_SELECTION (widget)) {
1868                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
1869                 GtkTreeModel     *model;
1870                 GList            *items, *l;
1871
1872                 items = gtk_tree_selection_get_selected_rows (selection, &model);
1873                 g_list_free (field_choice->selected_items);
1874                 field_choice->selected_items = NULL;
1875
1876                 for (l = items; l && l->data; l = g_list_next (l)) {
1877                         GtkTreeIter  iter;
1878                         GtkTreePath *path = (GtkTreePath *)l->data;
1879                         gint         item;
1880
1881                         gtk_tree_model_get_iter (model, &iter, path);
1882                         gtk_tree_model_get (model, &iter, 1, &item, -1);
1883
1884                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1885                                                                        GINT_TO_POINTER (item));
1886
1887                         gtk_tree_path_free (path);
1888                 }
1889
1890                 g_list_free (items);
1891
1892                 field->changed = TRUE;
1893         }
1894 }
1895
1896 static GtkWidget *
1897 ev_view_form_field_choice_create_widget (EvView      *view,
1898                                          EvFormField *field)
1899 {
1900         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1901         GtkWidget         *choice;
1902         GtkTreeModel      *model;
1903         gint               n_items, i;
1904         gint               selected_item = 0;
1905
1906         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
1907                                                                    field);
1908         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
1909         for (i = 0; i < n_items; i++) {
1910                 GtkTreeIter iter;
1911                 gchar      *item;
1912
1913                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
1914                                                                      field, i);
1915                 if (ev_document_forms_form_field_choice_is_item_selected (
1916                             EV_DOCUMENT_FORMS (view->document), field, i)) {
1917                         selected_item = i;
1918                         /* FIXME: we need a get_selected_items function in poppler */
1919                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1920                                                                        GINT_TO_POINTER (i));
1921                 }
1922
1923                 if (item) {
1924                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
1925                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
1926                                             0, item,
1927                                             1, i,
1928                                             -1);
1929                         g_free (item);
1930                 }
1931         }
1932
1933         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
1934                 GtkCellRenderer  *renderer;
1935                 GtkWidget        *tree_view;
1936                 GtkTreeSelection *selection;
1937
1938                 tree_view = gtk_tree_view_new_with_model (model);
1939                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
1940
1941                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
1942                 if (field_choice->multi_select) {
1943                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
1944                 }
1945
1946                 /* TODO: set selected items */
1947
1948                 renderer = gtk_cell_renderer_text_new ();
1949                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
1950                                                              0,
1951                                                              "choix", renderer,
1952                                                              "text", 0,
1953                                                              NULL);
1954
1955                 choice = gtk_scrolled_window_new (NULL, NULL);
1956                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
1957                                                 GTK_POLICY_AUTOMATIC,
1958                                                 GTK_POLICY_AUTOMATIC);
1959                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
1960                 gtk_widget_show (tree_view);
1961
1962                 g_signal_connect (selection, "changed",
1963                                   G_CALLBACK (ev_view_form_field_choice_changed),
1964                                   field);
1965                 g_signal_connect_after (selection, "changed",
1966                                         G_CALLBACK (ev_view_form_field_destroy),
1967                                         view);
1968         } else if (field_choice->is_editable) { /* ComboBoxEntry */
1969                 gchar *text;
1970
1971                 choice = gtk_combo_box_entry_new_with_model (model, 0);
1972                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
1973                 if (text) {
1974                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
1975                         g_free (text);
1976                 }
1977
1978                 g_signal_connect (choice, "changed",
1979                                   G_CALLBACK (ev_view_form_field_choice_changed),
1980                                   field);
1981                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
1982                                         G_CALLBACK (ev_view_form_field_destroy),
1983                                         view);
1984         } else { /* ComboBoxText */
1985                 GtkCellRenderer *renderer;
1986
1987                 choice = gtk_combo_box_new_with_model (model);
1988                 renderer = gtk_cell_renderer_text_new ();
1989                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
1990                                             renderer, TRUE);
1991                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
1992                                                 renderer,
1993                                                 "text", 0,
1994                                                 NULL);
1995                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
1996                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
1997
1998                 g_signal_connect (choice, "changed",
1999                                   G_CALLBACK (ev_view_form_field_choice_changed),
2000                                   field);
2001                 g_signal_connect_after (choice, "changed",
2002                                         G_CALLBACK (ev_view_form_field_destroy),
2003                                         view);
2004         }
2005
2006         g_object_unref (model);
2007
2008         g_object_weak_ref (G_OBJECT (choice),
2009                            (GWeakNotify)ev_view_form_field_choice_save,
2010                            view);
2011
2012         return choice;
2013 }
2014
2015 static void
2016 ev_view_handle_form_field (EvView      *view,
2017                            EvFormField *field,
2018                            gdouble      x,
2019                            gdouble      y)
2020 {
2021         GtkWidget   *field_widget = NULL;
2022         GList       *form_field_mapping;
2023         EvRectangle  field_area;
2024         GdkRectangle view_area;
2025
2026         if (field->is_read_only)
2027                 return;
2028
2029         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2030                 field_widget = ev_view_form_field_button_create_widget (view, field);
2031         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2032                 field_widget = ev_view_form_field_text_create_widget (view, field);
2033         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2034                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2035         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2036                 /* TODO */
2037         }
2038
2039         /* Form field doesn't require a widget */
2040         if (!field_widget)
2041                 return;
2042
2043         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2044                                 g_object_ref (field),
2045                                 (GDestroyNotify)g_object_unref);
2046
2047         form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, field->page->index);
2048         ev_form_field_mapping_get_area (form_field_mapping, field, &field_area);
2049
2050         doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
2051         view_area.x -= view->scroll_x;
2052         view_area.y -= view->scroll_y;
2053
2054         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2055         gtk_widget_show (field_widget);
2056         gtk_widget_grab_focus (field_widget);
2057 }
2058
2059 /*** GtkWidget implementation ***/
2060
2061 static void
2062 ev_view_size_request_continuous_dual_page (EvView         *view,
2063                                            GtkRequisition *requisition)
2064 {
2065         int max_width;
2066         gint n_pages;
2067         GtkBorder border;
2068
2069         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2070                                      view->scale, &max_width);
2071         compute_border (view, max_width, max_width, &border);
2072
2073         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
2074
2075         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2076         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
2077
2078         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2079                 requisition->width = 1;
2080         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2081                 requisition->width = 1;
2082                 /* FIXME: This could actually be set on one page docs or docs
2083                  * with a strange aspect ratio. */
2084                 /* requisition->height = 1;*/
2085         }
2086 }
2087
2088 static void
2089 ev_view_size_request_continuous (EvView         *view,
2090                                  GtkRequisition *requisition)
2091 {
2092         int max_width;
2093         int n_pages;
2094         GtkBorder border;
2095
2096
2097         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2098                                      view->scale, &max_width);
2099         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2100         compute_border (view, max_width, max_width, &border);
2101
2102         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2103         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
2104
2105         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2106                 requisition->width = 1;
2107         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2108                 requisition->width = 1;
2109                 /* FIXME: This could actually be set on one page docs or docs
2110                  * with a strange aspect ratio. */
2111                 /* requisition->height = 1;*/
2112         }
2113 }
2114
2115 static void
2116 ev_view_size_request_dual_page (EvView         *view,
2117                                 GtkRequisition *requisition)
2118 {
2119         GtkBorder border;
2120         gint width, height;
2121
2122         /* Find the largest of the two. */
2123         ev_page_cache_get_size (view->page_cache,
2124                                 view->current_page,
2125                                 view->rotation,
2126                                 view->scale,
2127                                 &width, &height);
2128         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
2129                 gint width_2, height_2;
2130                 ev_page_cache_get_size (view->page_cache,
2131                                         view->current_page + 1,
2132                                         view->rotation,
2133                                         view->scale,
2134                                         &width_2, &height_2);
2135                 if (width_2 > width) {
2136                         width = width_2;
2137                         height = height_2;
2138                 }
2139         }
2140         compute_border (view, width, height, &border);
2141
2142         requisition->width = ((width + border.left + border.right) * 2) +
2143                 (view->spacing * 3);
2144         requisition->height = (height + border.top + border.bottom) +
2145                 (view->spacing * 2);
2146
2147         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2148                 requisition->width = 1;
2149         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2150                 requisition->width = 1;
2151                 requisition->height = 1;
2152         }
2153 }
2154
2155 static void
2156 ev_view_size_request_single_page (EvView         *view,
2157                                   GtkRequisition *requisition)
2158 {
2159         GtkBorder border;
2160         gint width, height;
2161
2162         ev_page_cache_get_size (view->page_cache,
2163                                 view->current_page,
2164                                 view->rotation,
2165                                 view->scale,
2166                                 &width, &height);
2167         compute_border (view, width, height, &border);
2168
2169         requisition->width = width + border.left + border.right + (2 * view->spacing);
2170         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2171
2172         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2173                 requisition->width = 1;
2174                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2175         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2176                 requisition->width = 1;
2177                 requisition->height = 1;
2178         }
2179 }
2180
2181 static void
2182 ev_view_size_request (GtkWidget      *widget,
2183                       GtkRequisition *requisition)
2184 {
2185         EvView *view = EV_VIEW (widget);
2186
2187         if (view->document == NULL) {
2188                 requisition->width = 1;
2189                 requisition->height = 1;
2190                 return;
2191         }
2192
2193         if (view->presentation) {
2194                 requisition->width = 1;
2195                 requisition->height = 1;
2196                 return;
2197         }
2198
2199         if (view->continuous && view->dual_page)
2200                 ev_view_size_request_continuous_dual_page (view, requisition);
2201         else if (view->continuous)
2202                 ev_view_size_request_continuous (view, requisition);
2203         else if (view->dual_page)
2204                 ev_view_size_request_dual_page (view, requisition);
2205         else
2206                 ev_view_size_request_single_page (view, requisition);
2207 }
2208
2209 static void
2210 ev_view_size_allocate (GtkWidget      *widget,
2211                        GtkAllocation  *allocation)
2212 {
2213         EvView *view = EV_VIEW (widget);
2214         GList  *children, *l;
2215
2216         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2217
2218         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2219             view->sizing_mode == EV_SIZING_BEST_FIT) {
2220
2221                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
2222
2223                 ev_view_size_request (widget, &widget->requisition);
2224         }
2225
2226         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2227         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2228
2229         if (view->document)
2230                 view_update_range_and_current_page (view);
2231
2232         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2233         view->pending_resize = FALSE;
2234
2235         children = gtk_container_get_children (GTK_CONTAINER (widget));
2236         for (l = children; l && l->data; l = g_list_next (l)) {
2237                 EvFormField   *field;
2238                 EvRectangle    field_area;
2239                 GdkRectangle   view_area;
2240                 GList         *form_field_mapping;
2241                 GtkAllocation  child_allocation;
2242                 GtkRequisition child_requisition;
2243                 GtkWidget     *child = (GtkWidget *)l->data;
2244
2245                 field = g_object_get_data (G_OBJECT (child), "form-field");
2246                 if (!field)
2247                         continue;
2248
2249                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2250                                                                              field->page->index);
2251                 ev_form_field_mapping_get_area (form_field_mapping, field, &field_area);
2252
2253                 doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
2254                 view_area.x -= view->scroll_x;
2255                 view_area.y -= view->scroll_y;
2256
2257                 gtk_widget_size_request (child, &child_requisition);
2258                 if (child_requisition.width != view_area.width ||
2259                     child_requisition.height != view_area.height)
2260                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2261
2262                 gtk_container_child_get (GTK_CONTAINER (widget),
2263                                          child,
2264                                          "x", &child_allocation.x,
2265                                          "y", &child_allocation.y,
2266                                          NULL);
2267                 if (child_allocation.x != view_area.x ||
2268                     child_allocation.y != view_area.y) {
2269                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2270                 }
2271         }
2272         g_list_free (children);
2273 }
2274
2275 static void
2276 ev_view_realize (GtkWidget *widget)
2277 {
2278         EvView *view = EV_VIEW (widget);
2279
2280         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
2281                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
2282
2283         gdk_window_set_events (view->layout.bin_window,
2284                                (gdk_window_get_events (view->layout.bin_window) |
2285                                 GDK_EXPOSURE_MASK |
2286                                 GDK_BUTTON_PRESS_MASK |
2287                                 GDK_BUTTON_RELEASE_MASK |
2288                                 GDK_SCROLL_MASK |
2289                                 GDK_KEY_PRESS_MASK |
2290                                 GDK_POINTER_MOTION_MASK |
2291                                 GDK_POINTER_MOTION_HINT_MASK |
2292                                 GDK_ENTER_NOTIFY_MASK |
2293                                 GDK_LEAVE_NOTIFY_MASK));
2294
2295         if (view->presentation)
2296                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
2297         else
2298                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
2299 }
2300
2301 static gboolean
2302 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
2303 {
2304         EvView *view = EV_VIEW (widget);
2305         guint state;
2306
2307         state = event->state & gtk_accelerator_get_default_mod_mask ();
2308
2309         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
2310                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
2311
2312                 if (event->direction == GDK_SCROLL_UP ||
2313                     event->direction == GDK_SCROLL_LEFT) {
2314                         if (ev_view_can_zoom_in (view)) {
2315                                 ev_view_zoom_in (view);
2316                         }
2317                 } else {
2318                         if (ev_view_can_zoom_out (view)) {
2319                                 ev_view_zoom_out (view);
2320                         }
2321                 }
2322
2323                 return TRUE;
2324         }
2325
2326         view->jump_to_find_result = FALSE;
2327
2328         /* Shift+Wheel scrolls the in the perpendicular direction */
2329         if (state & GDK_SHIFT_MASK) {
2330                 if (event->direction == GDK_SCROLL_UP)
2331                         event->direction = GDK_SCROLL_LEFT;
2332                 else if (event->direction == GDK_SCROLL_LEFT)
2333                         event->direction = GDK_SCROLL_UP;
2334                 else if (event->direction == GDK_SCROLL_DOWN)
2335                         event->direction = GDK_SCROLL_RIGHT;
2336                 else if (event->direction == GDK_SCROLL_RIGHT)
2337                         event->direction = GDK_SCROLL_DOWN;
2338
2339                 event->state &= ~GDK_SHIFT_MASK;
2340                 state &= ~GDK_SHIFT_MASK;
2341         }
2342
2343         if (state == 0 && view->presentation) {
2344                 switch (event->direction) {
2345                         case GDK_SCROLL_DOWN:
2346                         case GDK_SCROLL_RIGHT:
2347                                 ev_view_next_page (view);
2348                                 break;
2349                         case GDK_SCROLL_UP:
2350                         case GDK_SCROLL_LEFT:
2351                                 ev_view_previous_page (view);
2352                                 break;
2353                 }
2354
2355                 return TRUE;
2356         }
2357
2358         return FALSE;
2359 }
2360
2361 static EvViewSelection *
2362 find_selection_for_page (EvView *view,
2363                          gint    page)
2364 {
2365         GList *list;
2366
2367         for (list = view->selection_info.selections; list != NULL; list = list->next) {
2368                 EvViewSelection *selection;
2369
2370                 selection = (EvViewSelection *) list->data;
2371
2372                 if (selection->page == page)
2373                         return selection;
2374         }
2375
2376         return NULL;
2377 }
2378
2379 static void
2380 draw_end_presentation_page (EvView       *view,
2381                             GdkRectangle *page_area)
2382 {
2383         PangoLayout *layout;
2384         PangoFontDescription *font_desc;
2385         gchar *markup;
2386         const gchar *text = _("End of presentation. Press Escape to exit.");
2387
2388         if (view->presentation_state != EV_PRESENTATION_END)
2389                 return;
2390
2391         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
2392         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
2393         pango_layout_set_markup (layout, markup, -1);
2394         g_free (markup);
2395
2396         font_desc = pango_font_description_new ();
2397         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
2398         pango_layout_set_font_description (layout, font_desc);
2399
2400         gtk_paint_layout (GTK_WIDGET (view)->style,
2401                           view->layout.bin_window,
2402                           GTK_WIDGET_STATE (view),
2403                           FALSE,
2404                           page_area,
2405                           GTK_WIDGET (view),
2406                           NULL,
2407                           page_area->x + 15,
2408                           page_area->y + 15,
2409                           layout);
2410
2411         pango_font_description_free (font_desc);
2412         g_object_unref (layout);
2413 }
2414
2415 static gboolean
2416 ev_view_expose_event (GtkWidget      *widget,
2417                       GdkEventExpose *event)
2418 {
2419         EvView  *view = EV_VIEW (widget);
2420         cairo_t *cr;
2421         gint     i;
2422
2423         if (view->animation && ev_transition_animation_ready (view->animation)) {
2424                 GdkRectangle page_area;
2425                 GtkBorder    border;
2426
2427                 if (get_page_extents (view, view->current_page, &page_area, &border)) {
2428                         cr = gdk_cairo_create (view->layout.bin_window);
2429
2430                         /* normalize to x=0, y=0 */
2431                         cairo_translate (cr, page_area.x, page_area.y);
2432                         page_area.x = page_area.y = 0;
2433
2434                         ev_transition_animation_paint (view->animation, cr, page_area);
2435                         cairo_destroy (cr);
2436                 }
2437
2438                 return TRUE;
2439         }
2440
2441         if (view->presentation) {
2442                 switch (view->presentation_state) {
2443                         case EV_PRESENTATION_END: {
2444                                 GdkRectangle area = {0};
2445
2446                                 area.width = widget->allocation.width;
2447                                 area.height = widget->allocation.height;
2448
2449                                 draw_end_presentation_page (view, &area);
2450                         }
2451                                 return FALSE;
2452                         case EV_PRESENTATION_BLACK:
2453                         case EV_PRESENTATION_WHITE:
2454                                 return FALSE;
2455                         case EV_PRESENTATION_NORMAL:
2456                         default:
2457                                 break;
2458                 }
2459         } else if (view->loading) {
2460                 GdkRectangle area = {0};
2461
2462                 area.width = widget->allocation.width;
2463                 area.height = widget->allocation.height;
2464
2465                 draw_loading_text (view,
2466                                    &area,
2467                                    &(event->area));
2468         }
2469
2470         if (view->document == NULL)
2471                 return FALSE;
2472
2473         cr = gdk_cairo_create (view->layout.bin_window);
2474
2475         for (i = view->start_page; i <= view->end_page; i++) {
2476                 GdkRectangle page_area;
2477                 GtkBorder border;
2478                 gboolean page_ready = TRUE;
2479
2480                 if (!get_page_extents (view, i, &page_area, &border))
2481                         continue;
2482
2483                 page_area.x -= view->scroll_x;
2484                 page_area.y -= view->scroll_y;
2485
2486                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
2487
2488                 if (page_ready && view->find_pages && view->highlight_find_results)
2489                         highlight_find_results (view, i);
2490         }
2491
2492         cairo_destroy (cr);
2493
2494         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
2495                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
2496
2497         return FALSE;
2498 }
2499
2500 static gboolean
2501 ev_view_do_popup_menu (EvView *view,
2502                        gdouble x,
2503                        gdouble y)
2504 {
2505         EvLink  *link;
2506         EvImage *image;
2507
2508         image = ev_view_get_image_at_location (view, x, y);
2509         if (image) {
2510                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
2511                 return TRUE;
2512         }
2513
2514         link = ev_view_get_link_at_location (view, x, y);
2515         if (link) {
2516                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
2517                 return TRUE;
2518         }
2519
2520         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
2521
2522         return TRUE;
2523 }
2524
2525 static gboolean
2526 ev_view_popup_menu (GtkWidget *widget)
2527 {
2528         gint x, y;
2529
2530         gtk_widget_get_pointer (widget, &x, &y);
2531         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
2532 }
2533
2534 static void
2535 get_link_area (EvView       *view,
2536                gint          x,
2537                gint          y,
2538                EvLink       *link,
2539                GdkRectangle *area)
2540 {
2541         EvRectangle  ev_rect;
2542         GList       *link_mapping;
2543         gint         page;
2544         gint         x_offset = 0, y_offset = 0;
2545
2546         x += view->scroll_x;
2547         y += view->scroll_y;
2548
2549         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
2550
2551         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
2552         ev_link_mapping_get_area (link_mapping, link, &ev_rect);
2553
2554         doc_rect_to_view_rect (view, page, &ev_rect, area);
2555         area->y -= view->scroll_y ;
2556 }
2557
2558 static gboolean
2559 ev_view_query_tooltip (GtkWidget         *widget,
2560                        gint               x,
2561                        gint               y,
2562                        gboolean           keyboard_tip,
2563                        GtkTooltip        *tooltip)
2564 {
2565         EvView *view = EV_VIEW (widget);
2566         EvLink *link;
2567         gchar  *text;
2568
2569         link = ev_view_get_link_at_location (view, x, y);
2570         if (!link)
2571                 return FALSE;
2572
2573         text = tip_from_link (view, link);
2574         if (text && g_utf8_validate (text, -1, NULL)) {
2575                 GdkRectangle link_area;
2576
2577                 get_link_area (view, x, y, link, &link_area);
2578                 gtk_tooltip_set_text (tooltip, text);
2579                 gtk_tooltip_set_tip_area (tooltip, &link_area);
2580         }
2581         g_free (text);
2582
2583         return TRUE;
2584 }
2585
2586 static void
2587 start_selection_for_event (EvView         *view,
2588                            GdkEventButton *event)
2589 {
2590         EvSelectionStyle style;
2591
2592         clear_selection (view);
2593
2594         view->selection_info.start.x = event->x + view->scroll_x;
2595         view->selection_info.start.y = event->y + view->scroll_y;
2596
2597         switch (event->type) {
2598                 case GDK_2BUTTON_PRESS:
2599                         style = EV_SELECTION_STYLE_WORD;
2600                         break;
2601                 case GDK_3BUTTON_PRESS:
2602                         style = EV_SELECTION_STYLE_LINE;
2603                         break;
2604                 default:
2605                         style = EV_SELECTION_STYLE_GLYPH;
2606                         break;
2607         }
2608
2609         view->selection_info.style = style;
2610 }
2611
2612 static gboolean
2613 ev_view_button_press_event (GtkWidget      *widget,
2614                             GdkEventButton *event)
2615 {
2616         EvView *view = EV_VIEW (widget);
2617
2618         if (!view->document)
2619                 return FALSE;
2620
2621         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
2622                 gtk_widget_grab_focus (widget);
2623         }
2624
2625         view->pressed_button = event->button;
2626         view->selection_info.in_drag = FALSE;
2627
2628         if (view->scroll_info.autoscrolling)
2629                 return TRUE;
2630
2631         switch (event->button) {
2632                 case 1: {
2633                         EvImage *image;
2634                         EvFormField *field;
2635
2636                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
2637                                 if (event->type == GDK_3BUTTON_PRESS) {
2638                                         start_selection_for_event (view, event);
2639                                 } else if (location_in_selected_text (view,
2640                                                                event->x + view->scroll_x,
2641                                                                event->y + view->scroll_y)) {
2642                                         view->selection_info.in_drag = TRUE;
2643                                 } else {
2644                                         start_selection_for_event (view, event);
2645                                 }
2646
2647                                 gtk_widget_queue_draw (widget);
2648                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
2649                                 ev_view_remove_all (view);
2650                                 ev_view_handle_form_field (view, field, event->x, event->y);
2651                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
2652                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
2653                                 if (view->image_dnd_info.image)
2654                                         g_object_unref (view->image_dnd_info.image);
2655                                 view->image_dnd_info.image = g_object_ref (image);
2656                                 view->image_dnd_info.in_drag = TRUE;
2657
2658                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
2659                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
2660                         } else {
2661                                 ev_view_remove_all (view);
2662
2663                                 if (EV_IS_SELECTION (view->document))
2664                                         start_selection_for_event (view, event);
2665                         }
2666                 }
2667                         return TRUE;
2668                 case 2:
2669                         /* use root coordinates as reference point because
2670                          * scrolling changes window relative coordinates */
2671                         view->drag_info.start.x = event->x_root;
2672                         view->drag_info.start.y = event->y_root;
2673                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
2674                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
2675
2676                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
2677
2678                         return TRUE;
2679                 case 3:
2680                         view->scroll_info.start_y = event->y;
2681                         return ev_view_do_popup_menu (view, event->x, event->y);
2682         }
2683
2684         return FALSE;
2685 }
2686
2687 static void
2688 ev_view_remove_all (EvView *view)
2689 {
2690         GList *children, *child;
2691
2692         children = gtk_container_get_children (GTK_CONTAINER (view));
2693         for (child = children; child && child->data; child = g_list_next (child)) {
2694                 gtk_container_remove (GTK_CONTAINER (view),
2695                                       GTK_WIDGET (child->data));
2696         }
2697         g_list_free (children);
2698 }
2699
2700 /*** Drag and Drop ***/
2701 static void
2702 ev_view_drag_data_get (GtkWidget        *widget,
2703                        GdkDragContext   *context,
2704                        GtkSelectionData *selection_data,
2705                        guint             info,
2706                        guint             time)
2707 {
2708         EvView *view = EV_VIEW (widget);
2709
2710         switch (info) {
2711                 case TARGET_DND_TEXT:
2712                         if (EV_IS_SELECTION (view->document) &&
2713                             view->selection_info.selections) {
2714                                 gchar *text;
2715
2716                                 text = get_selected_text (view);
2717                                 gtk_selection_data_set_text (selection_data,
2718                                                              text,
2719                                                              strlen (text));
2720                                 g_free (text);
2721                         }
2722                         break;
2723                 case TARGET_DND_IMAGE:
2724                         if (view->image_dnd_info.image) {
2725                                 GdkPixbuf *pixbuf;
2726
2727                                 ev_document_doc_mutex_lock ();
2728                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
2729                                                                        view->image_dnd_info.image);
2730                                 ev_document_doc_mutex_unlock ();
2731
2732                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
2733                                 g_object_unref (pixbuf);
2734                         }
2735                         break;
2736                 case TARGET_DND_URI:
2737                         if (view->image_dnd_info.image) {
2738                                 GdkPixbuf   *pixbuf;
2739                                 const gchar *tmp_uri;
2740                                 gchar       *uris[2];
2741
2742                                 ev_document_doc_mutex_lock ();
2743                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
2744                                                                        view->image_dnd_info.image);
2745                                 ev_document_doc_mutex_unlock ();
2746
2747                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
2748                                 g_object_unref (pixbuf);
2749
2750                                 uris[0] = (gchar *)tmp_uri;
2751                                 uris[1] = NULL;
2752                                 gtk_selection_data_set_uris (selection_data, uris);
2753                         }
2754         }
2755 }
2756
2757 static gboolean
2758 ev_view_drag_motion (GtkWidget      *widget,
2759                      GdkDragContext *context,
2760                      gint            x,
2761                      gint            y,
2762                      guint           time)
2763 {
2764         if (gtk_drag_get_source_widget (context) == widget)
2765                 gdk_drag_status (context, 0, time);
2766         else
2767                 gdk_drag_status (context, context->suggested_action, time);
2768
2769         return TRUE;
2770 }
2771
2772 static gboolean
2773 selection_update_idle_cb (EvView *view)
2774 {
2775         compute_selections (view,
2776                             view->selection_info.style,
2777                             &view->selection_info.start,
2778                             &view->motion);
2779         view->selection_update_id = 0;
2780         return FALSE;
2781 }
2782
2783 static gboolean
2784 selection_scroll_timeout_cb (EvView *view)
2785 {
2786         gint x, y, shift = 0;
2787         GtkWidget *widget = GTK_WIDGET (view);
2788
2789         gtk_widget_get_pointer (widget, &x, &y);
2790
2791         if (y > widget->allocation.height) {
2792                 shift = (y - widget->allocation.height) / 2;
2793         } else if (y < 0) {
2794                 shift = y / 2;
2795         }
2796
2797         if (shift)
2798                 gtk_adjustment_set_value (view->vadjustment,
2799                                           CLAMP (view->vadjustment->value + shift,
2800                                           view->vadjustment->lower,
2801                                           view->vadjustment->upper -
2802                                           view->vadjustment->page_size));
2803
2804         if (x > widget->allocation.width) {
2805                 shift = (x - widget->allocation.width) / 2;
2806         } else if (x < 0) {
2807                 shift = x / 2;
2808         }
2809
2810         if (shift)
2811                 gtk_adjustment_set_value (view->hadjustment,
2812                                           CLAMP (view->hadjustment->value + shift,
2813                                           view->hadjustment->lower,
2814                                           view->hadjustment->upper -
2815                                           view->hadjustment->page_size));
2816
2817         return TRUE;
2818 }
2819
2820 static gboolean
2821 ev_view_drag_update_momentum (EvView *view)
2822 {
2823         int i;
2824         if (!view->drag_info.in_drag)
2825                 return FALSE;
2826
2827         for (i = DRAG_HISTORY - 1; i > 0; i--) {
2828                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
2829                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
2830         }
2831
2832         /* Momentum is a moving average of 10ms granularity over
2833          * the last 100ms with each 10ms stored in buffer.
2834          */
2835
2836         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
2837         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
2838
2839         return TRUE;
2840 }
2841
2842 static gboolean
2843 ev_view_scroll_drag_release (EvView *view)
2844 {
2845         gdouble dhadj_value, dvadj_value;
2846         gdouble oldhadjustment, oldvadjustment;
2847
2848         view->drag_info.momentum.x /= 1.2;
2849         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
2850
2851         dhadj_value = view->hadjustment->page_size *
2852                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
2853         dvadj_value = view->vadjustment->page_size *
2854                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
2855
2856         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
2857         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
2858
2859         if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
2860            ((oldhadjustment + dhadj_value) < 0))
2861                 view->drag_info.momentum.x *= -0.5; /* 0.5 rather than 1 means the edges absorb some momentum */
2862         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
2863            ((oldvadjustment + dvadj_value) < 0))
2864                 view->drag_info.momentum.y *= -0.5;
2865
2866         gtk_adjustment_set_value (view->hadjustment,
2867                                 MIN (oldhadjustment + dhadj_value,
2868                                 view->hadjustment->upper - view->hadjustment->page_size));
2869         gtk_adjustment_set_value (view->vadjustment,
2870                                 MIN (oldvadjustment + dvadj_value,
2871                                 view->vadjustment->upper - view->vadjustment->page_size));
2872
2873         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
2874            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
2875                 return FALSE;
2876         else
2877                 return TRUE;
2878 }
2879
2880 static gboolean
2881 ev_view_motion_notify_event (GtkWidget      *widget,
2882                              GdkEventMotion *event)
2883 {
2884         EvView *view = EV_VIEW (widget);
2885         gint x, y;
2886
2887         if (!view->document)
2888                 return FALSE;
2889
2890
2891         if (event->is_hint || event->window != view->layout.bin_window) {
2892             gtk_widget_get_pointer (widget, &x, &y);
2893         } else {
2894             x = event->x;
2895             y = event->y;
2896         }
2897
2898         if (view->scroll_info.autoscrolling) {
2899                 view->scroll_info.last_y = y;
2900                 return TRUE;
2901         }
2902
2903         if (view->selection_info.in_drag) {
2904                 if (gtk_drag_check_threshold (widget,
2905                                               view->selection_info.start.x,
2906                                               view->selection_info.start.y,
2907                                               x, y)) {
2908                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
2909
2910                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
2911
2912                         gtk_drag_begin (widget, target_list,
2913                                         GDK_ACTION_COPY,
2914                                         1, (GdkEvent *)event);
2915
2916                         view->selection_info.in_drag = FALSE;
2917
2918                         gtk_target_list_unref (target_list);
2919
2920                         return TRUE;
2921                 }
2922         } else if (view->image_dnd_info.in_drag) {
2923                 if (gtk_drag_check_threshold (widget,
2924                                               view->selection_info.start.x,
2925                                               view->selection_info.start.y,
2926                                               x, y)) {
2927                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
2928
2929                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
2930                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
2931
2932                         gtk_drag_begin (widget, target_list,
2933                                         GDK_ACTION_COPY,
2934                                         1, (GdkEvent *)event);
2935
2936                         view->image_dnd_info.in_drag = FALSE;
2937
2938                         gtk_target_list_unref (target_list);
2939
2940                         return TRUE;
2941                 }
2942         }
2943
2944         switch (view->pressed_button) {
2945         case 1:
2946                 /* For the Evince 0.4.x release, we limit selection to un-rotated
2947                  * documents only.
2948                  */
2949                 if (view->rotation != 0)
2950                         return FALSE;
2951
2952                 /* Schedule timeout to scroll during selection and additionally
2953                  * scroll once to allow arbitrary speed. */
2954                 if (!view->selection_scroll_id)
2955                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
2956                                                                (GSourceFunc)selection_scroll_timeout_cb,
2957                                                                view);
2958                 else
2959                     selection_scroll_timeout_cb (view);
2960
2961                 view->selection_info.in_selection = TRUE;
2962                 view->motion.x = x + view->scroll_x;
2963                 view->motion.y = y + view->scroll_y;
2964
2965                 /* Queue an idle to handle the motion.  We do this because
2966                  * handling any selection events in the motion could be slower
2967                  * than new motion events reach us.  We always put it in the
2968                  * idle to make sure we catch up and don't visibly lag the
2969                  * mouse. */
2970                 if (!view->selection_update_id)
2971                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
2972
2973                 return TRUE;
2974         case 2:
2975                 if (!view->drag_info.in_drag) {
2976                         gboolean start;
2977                         int i;
2978
2979                         start = gtk_drag_check_threshold (widget,
2980                                                           view->drag_info.start.x,
2981                                                           view->drag_info.start.y,
2982                                                           event->x_root,
2983                                                           event->y_root);
2984                         view->drag_info.in_drag = start;
2985                         view->drag_info.drag_timeout_id = g_timeout_add (10,
2986                                 (GSourceFunc)ev_view_drag_update_momentum, view);
2987                         /* Set 100 to choose how long it takes to build up momentum */
2988                         /* Clear out previous momentum info: */
2989                         for (i = 0; i < DRAG_HISTORY; i++) {
2990                                 view->drag_info.buffer[i].x = event->x;
2991                                 view->drag_info.buffer[i].y = event->y;
2992                         }
2993                         view->drag_info.momentum.x = 0;
2994                         view->drag_info.momentum.y = 0;
2995                 }
2996
2997                 if (view->drag_info.in_drag) {
2998                         int dx, dy;
2999                         gdouble dhadj_value, dvadj_value;
3000
3001                         view->drag_info.buffer[0].x = event->x;
3002                         view->drag_info.buffer[0].y = event->y;
3003
3004                         dx = event->x_root - view->drag_info.start.x;
3005                         dy = event->y_root - view->drag_info.start.y;
3006
3007                         dhadj_value = view->hadjustment->page_size *
3008                                       (gdouble)dx / widget->allocation.width;
3009                         dvadj_value = view->vadjustment->page_size *
3010                                       (gdouble)dy / widget->allocation.height;
3011
3012                         /* clamp scrolling to visible area */
3013                         gtk_adjustment_set_value (view->hadjustment,
3014                                                   MIN(view->drag_info.hadj - dhadj_value,
3015                                                       view->hadjustment->upper -
3016                                                       view->hadjustment->page_size));
3017                         gtk_adjustment_set_value (view->vadjustment,
3018                                                   MIN(view->drag_info.vadj - dvadj_value,
3019                                                       view->vadjustment->upper -
3020                                                       view->vadjustment->page_size));
3021
3022                         return TRUE;
3023                 }
3024
3025                 break;
3026         default:
3027                 ev_view_handle_cursor_over_xy (view, x, y);
3028         }
3029
3030         return FALSE;
3031 }
3032
3033 static gboolean
3034 ev_view_button_release_event (GtkWidget      *widget,
3035                               GdkEventButton *event)
3036 {
3037         EvView *view = EV_VIEW (widget);
3038         EvLink *link = NULL;
3039
3040         view->image_dnd_info.in_drag = FALSE;
3041
3042         if (view->scroll_info.autoscrolling) {
3043                 ev_view_autoscroll_stop (view);
3044                 view->pressed_button = -1;
3045
3046                 return TRUE;
3047         }
3048
3049         if (view->drag_info.in_drag) {
3050                 view->drag_info.release_timeout_id =
3051                         g_timeout_add (20,
3052                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3053         }
3054
3055         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3056                 link = ev_view_get_link_at_location (view, event->x, event->y);
3057         }
3058
3059         view->drag_info.in_drag = FALSE;
3060
3061         if (view->pressed_button == 2) {
3062                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3063         }
3064
3065         view->pressed_button = -1;
3066
3067         if (view->selection_scroll_id) {
3068             g_source_remove (view->selection_scroll_id);
3069             view->selection_scroll_id = 0;
3070         }
3071         if (view->selection_update_id) {
3072             g_source_remove (view->selection_update_id);
3073             view->selection_update_id = 0;
3074         }
3075
3076         if (!view->selection_info.in_selection &&
3077             view->selection_info.style != EV_SELECTION_STYLE_GLYPH) {
3078                 compute_selections (view,
3079                                     view->selection_info.style,
3080                                     &(view->selection_info.start),
3081                                     &(view->selection_info.start));
3082         }
3083
3084         if (view->selection_info.selections) {
3085                 clear_link_selected (view);
3086                 ev_view_update_primary_selection (view);
3087
3088                 if (view->selection_info.in_drag) {
3089                         clear_selection (view);
3090                         gtk_widget_queue_draw (widget);
3091                 }
3092
3093                 view->selection_info.in_drag = FALSE;
3094         } else if (link) {
3095                 if (event->button == 2) {
3096                         EvLinkAction    *action;
3097                         EvLinkActionType type;
3098
3099                         action = ev_link_get_action (link);
3100                         if (!action)
3101                                 return FALSE;
3102
3103                         type = ev_link_action_get_action_type (action);
3104                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3105                                 g_signal_emit (view,
3106                                                signals[SIGNAL_EXTERNAL_LINK],
3107                                                0, action);
3108                         }
3109                 } else {
3110                         ev_view_handle_link (view, link);
3111                 }
3112         } else if (view->presentation) {
3113                 switch (event->button) {
3114                         case 1:
3115                                 ev_view_next_page (view);
3116                                 return TRUE;
3117                         case 3:
3118                                 ev_view_previous_page (view);
3119                                 return TRUE;
3120                 }
3121         }
3122
3123         return FALSE;
3124 }
3125
3126 /* Goto Window */
3127 /* Cut and paste from gtkwindow.c */
3128 static void
3129 send_focus_change (GtkWidget *widget,
3130                    gboolean   in)
3131 {
3132         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3133
3134         g_object_ref (widget);
3135
3136         if (in)
3137                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3138         else
3139                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3140
3141         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3142         fevent->focus_change.window = g_object_ref (widget->window);
3143         fevent->focus_change.in = in;
3144
3145         gtk_widget_event (widget, fevent);
3146
3147         g_object_notify (G_OBJECT (widget), "has-focus");
3148
3149         g_object_unref (widget);
3150         gdk_event_free (fevent);
3151 }
3152
3153 static void
3154 ev_view_goto_window_hide (EvView *view)
3155 {
3156         /* send focus-in event */
3157         send_focus_change (view->goto_entry, FALSE);
3158         gtk_widget_hide (view->goto_window);
3159         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3160 }
3161
3162 static gboolean
3163 ev_view_goto_window_delete_event (GtkWidget   *widget,
3164                                   GdkEventAny *event,
3165                                   EvView      *view)
3166 {
3167         ev_view_goto_window_hide (view);
3168
3169         return TRUE;
3170 }
3171
3172 static gboolean
3173 key_is_numeric (guint keyval)
3174 {
3175         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3176                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3177 }
3178
3179 static gboolean
3180 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3181                                      GdkEventKey *event,
3182                                      EvView      *view)
3183 {
3184         switch (event->keyval) {
3185                 case GDK_Escape:
3186                 case GDK_Tab:
3187                 case GDK_KP_Tab:
3188                 case GDK_ISO_Left_Tab:
3189                         ev_view_goto_window_hide (view);
3190                         return TRUE;
3191                 case GDK_Return:
3192                 case GDK_KP_Enter:
3193                 case GDK_ISO_Enter:
3194                 case GDK_BackSpace:
3195                 case GDK_Delete:
3196                         return FALSE;
3197                 default:
3198                         if (!key_is_numeric (event->keyval))
3199                                 return TRUE;
3200         }
3201
3202         return FALSE;
3203 }
3204
3205 static gboolean
3206 ev_view_goto_window_button_press_event (GtkWidget      *widget,
3207                                         GdkEventButton *event,
3208                                         EvView         *view)
3209 {
3210         ev_view_goto_window_hide (view);
3211
3212         return TRUE;
3213 }
3214
3215 static void
3216 ev_view_goto_entry_activate (GtkEntry *entry,
3217                              EvView   *view)
3218 {
3219         const gchar *text;
3220         gint         page;
3221
3222         text = gtk_entry_get_text (entry);
3223         page = atoi (text) - 1;
3224
3225         ev_view_goto_window_hide (view);
3226
3227         if (page >= 0 &&
3228             page < ev_page_cache_get_n_pages (view->page_cache))
3229                 ev_page_cache_set_current_page (view->page_cache, page);
3230 }
3231
3232 static void
3233 ev_view_goto_window_create (EvView *view)
3234 {
3235         GtkWidget *frame, *hbox, *toplevel, *label;
3236
3237         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
3238
3239         if (view->goto_window) {
3240                 if (GTK_WINDOW (toplevel)->group)
3241                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3242                                                      GTK_WINDOW (view->goto_window));
3243                 else if (GTK_WINDOW (view->goto_window)->group)
3244                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
3245                                                         GTK_WINDOW (view->goto_window));
3246                 return;
3247         }
3248
3249         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
3250
3251         if (GTK_WINDOW (toplevel)->group)
3252                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3253                                              GTK_WINDOW (view->goto_window));
3254
3255         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
3256
3257         g_signal_connect (view->goto_window, "delete_event",
3258                           G_CALLBACK (ev_view_goto_window_delete_event),
3259                           view);
3260         g_signal_connect (view->goto_window, "key_press_event",
3261                           G_CALLBACK (ev_view_goto_window_key_press_event),
3262                           view);
3263         g_signal_connect (view->goto_window, "button_press_event",
3264                           G_CALLBACK (ev_view_goto_window_button_press_event),
3265                           view);
3266
3267         frame = gtk_frame_new (NULL);
3268         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
3269         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
3270         gtk_widget_show (frame);
3271
3272         hbox = gtk_hbox_new (FALSE, 0);
3273         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
3274         gtk_container_add (GTK_CONTAINER (frame), hbox);
3275         gtk_widget_show (hbox);
3276
3277         label = gtk_label_new(_("Jump to page:"));
3278         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
3279         gtk_widget_show (label);
3280         gtk_widget_realize (label);
3281
3282         view->goto_entry = gtk_entry_new ();
3283         g_signal_connect (view->goto_entry, "activate",
3284                           G_CALLBACK (ev_view_goto_entry_activate),
3285                           view);
3286         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
3287         gtk_widget_show (view->goto_entry);
3288         gtk_widget_realize (view->goto_entry);
3289 }
3290
3291 static void
3292 ev_view_goto_entry_grab_focus (EvView *view)
3293 {
3294         GtkWidgetClass *entry_parent_class;
3295
3296         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
3297         (entry_parent_class->grab_focus) (view->goto_entry);
3298
3299         send_focus_change (view->goto_entry, TRUE);
3300 }
3301
3302 static void
3303 ev_view_goto_window_send_key_event (EvView   *view,
3304                                     GdkEvent *event)
3305 {
3306         GdkEventKey *new_event;
3307         GdkScreen   *screen;
3308
3309         /* Move goto window off screen */
3310         screen = gtk_widget_get_screen (GTK_WIDGET (view));
3311         gtk_window_move (GTK_WINDOW (view->goto_window),
3312                          gdk_screen_get_width (screen) + 1,
3313                          gdk_screen_get_height (screen) + 1);
3314         gtk_widget_show (view->goto_window);
3315
3316         new_event = (GdkEventKey *) gdk_event_copy (event);
3317         g_object_unref (new_event->window);
3318         new_event->window = g_object_ref (view->goto_window->window);
3319         gtk_widget_realize (view->goto_window);
3320
3321         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
3322         gdk_event_free ((GdkEvent *)new_event);
3323         gtk_widget_hide (view->goto_window);
3324 }
3325
3326 static gboolean
3327 ev_view_key_press_event (GtkWidget   *widget,
3328                          GdkEventKey *event)
3329 {
3330         EvView *view = EV_VIEW (widget);
3331         EvPresentationState current;
3332
3333         if (!view->document)
3334                 return FALSE;
3335
3336         if (!view->presentation ||
3337             view->presentation_state == EV_PRESENTATION_END)
3338                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3339
3340
3341         current = view->presentation_state;
3342
3343         switch (event->keyval) {
3344                 case GDK_b:
3345                 case GDK_B:
3346                 case GDK_period:
3347                 case GDK_KP_Decimal:
3348                         view->presentation_state =
3349                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
3350                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
3351                         break;
3352                 case GDK_w:
3353                 case GDK_W:
3354                         view->presentation_state =
3355                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
3356                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
3357                         break;
3358                 default:
3359                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
3360                             view->presentation_state == EV_PRESENTATION_WHITE) {
3361                                 view->presentation_state = EV_PRESENTATION_NORMAL;
3362                         }
3363         }
3364
3365         if (current == view->presentation_state) {
3366                 if (ev_page_cache_get_n_pages (view->page_cache) > 1 &&
3367                     key_is_numeric (event->keyval)) {
3368                         gint x, y;
3369
3370                         ev_view_goto_window_create (view);
3371                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
3372                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
3373                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
3374                         gtk_widget_show (view->goto_window);
3375                         ev_view_goto_entry_grab_focus (view);
3376
3377                         return TRUE;
3378                 }
3379
3380                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3381         }
3382
3383         switch (view->presentation_state) {
3384                 case EV_PRESENTATION_NORMAL:
3385                 case EV_PRESENTATION_BLACK:
3386                         gdk_window_set_background (view->layout.bin_window,
3387                                                    &widget->style->black);
3388                         break;
3389                 case EV_PRESENTATION_WHITE:
3390                         gdk_window_set_background (view->layout.bin_window,
3391                                                    &widget->style->white);
3392                         break;
3393                 default:
3394                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3395         }
3396
3397         gtk_widget_queue_draw (widget);
3398         return TRUE;
3399 }
3400
3401 static gint
3402 ev_view_focus_in (GtkWidget     *widget,
3403                   GdkEventFocus *event)
3404 {
3405         if (EV_VIEW (widget)->pixbuf_cache)
3406                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3407         gtk_widget_queue_draw (widget);
3408
3409         return FALSE;
3410 }
3411
3412 static gint
3413 ev_view_focus_out (GtkWidget     *widget,
3414                      GdkEventFocus *event)
3415 {
3416         if (EV_VIEW (widget)->goto_window)
3417                 ev_view_goto_window_hide (EV_VIEW (widget));
3418
3419         if (EV_VIEW (widget)->pixbuf_cache)
3420                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3421         gtk_widget_queue_draw (widget);
3422
3423         return FALSE;
3424 }
3425
3426 static gboolean
3427 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3428 {
3429         EvView *view = EV_VIEW (widget);
3430
3431         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
3432                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3433
3434         return FALSE;
3435 }
3436
3437 static gboolean
3438 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3439 {
3440         EvView *view = EV_VIEW (widget);
3441
3442         ev_view_handle_cursor_over_xy (view, event->x, event->y);
3443
3444         return FALSE;
3445 }
3446
3447 static void
3448 ev_view_style_set (GtkWidget *widget,
3449                    GtkStyle  *old_style)
3450 {
3451         if (EV_VIEW (widget)->pixbuf_cache)
3452                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3453
3454         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
3455 }
3456
3457 /*** Drawing ***/
3458
3459 static guint32
3460 ev_gdk_color_to_rgb (const GdkColor *color)
3461 {
3462   guint32 result;
3463   result = (0xff0000 | (color->red & 0xff00));
3464   result <<= 8;
3465   result |= ((color->green & 0xff00) | (color->blue >> 8));
3466   return result;
3467 }
3468
3469 static void
3470 draw_rubberband (GtkWidget *widget, GdkWindow *window,
3471                  const GdkRectangle *rect, guchar alpha)
3472 {
3473         GdkGC *gc;
3474         GdkPixbuf *pixbuf;
3475         GdkColor *fill_color_gdk;
3476         guint fill_color;
3477
3478         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
3479         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
3480
3481         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
3482                                  rect->width, rect->height);
3483         gdk_pixbuf_fill (pixbuf, fill_color);
3484
3485         gdk_draw_pixbuf (window, NULL, pixbuf,
3486                          0, 0,
3487                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3488                          rect->width, rect->height,
3489                          GDK_RGB_DITHER_NONE,
3490                          0, 0);
3491
3492         g_object_unref (pixbuf);
3493
3494         gc = gdk_gc_new (window);
3495         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
3496         gdk_draw_rectangle (window, gc, FALSE,
3497                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3498                             rect->width - 1,
3499                             rect->height - 1);
3500         g_object_unref (gc);
3501
3502         gdk_color_free (fill_color_gdk);
3503 }
3504
3505
3506 static void
3507 highlight_find_results (EvView *view, int page)
3508 {
3509         gint i, n_results = 0;
3510
3511         n_results = ev_view_find_get_n_results (view, page);
3512
3513         for (i = 0; i < n_results; i++) {
3514                 EvRectangle *rectangle;
3515                 GdkRectangle view_rectangle;
3516                 guchar alpha;
3517
3518                 if (i == view->find_result && page == view->current_page) {
3519                         alpha = 0x90;
3520                 } else {
3521                         alpha = 0x20;
3522                 }
3523
3524                 rectangle = ev_view_find_get_result (view, page, i);
3525                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
3526                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
3527                                  &view_rectangle, alpha);
3528         }
3529 }
3530
3531 static void
3532 draw_loading_text (EvView       *view,
3533                    GdkRectangle *page_area,
3534                    GdkRectangle *expose_area)
3535 {
3536         cairo_t *cr;
3537         gint     width, height;
3538
3539         if (!view->loading_text) {
3540                 const gchar *loading_text = _("Loading...");
3541                 PangoLayout *layout;
3542                 PangoFontDescription *font_desc;
3543                 PangoRectangle logical_rect;
3544                 gint target_width;
3545                 gdouble real_scale;
3546
3547                 ev_document_fc_mutex_lock ();
3548
3549                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
3550
3551                 font_desc = pango_font_description_new ();
3552
3553                 /* We set the font to be 10 points, get the size, and scale appropriately */
3554                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
3555                 pango_layout_set_font_description (layout, font_desc);
3556                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
3557
3558                 target_width = MAX (page_area->width / 2, 1);
3559                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
3560                 pango_font_description_set_size (font_desc, (int)real_scale);
3561                 pango_layout_set_font_description (layout, font_desc);
3562                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
3563
3564                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
3565                                                                  logical_rect.width,
3566                                                                  logical_rect.height);
3567                 cr = cairo_create (view->loading_text);
3568                 cairo_set_source_rgb (cr,
3569                                       155 / (double)255,
3570                                       155 / (double)255,
3571                                       155 / (double)255);
3572                 pango_cairo_show_layout (cr, layout);
3573                 cairo_destroy (cr);
3574
3575                 pango_font_description_free (font_desc);
3576                 g_object_unref (layout);
3577
3578                 ev_document_fc_mutex_unlock ();
3579         }
3580
3581         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
3582         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
3583
3584         cr = gdk_cairo_create (view->layout.bin_window);
3585         cairo_translate (cr,
3586                          page_area->x + width,
3587                          page_area->y + height);
3588         cairo_set_source_surface (cr, view->loading_text, 0, 0);
3589         cairo_paint (cr);
3590         cairo_destroy (cr);
3591 }
3592
3593 static void
3594 draw_one_page (EvView       *view,
3595                gint          page,
3596                cairo_t      *cr,
3597                GdkRectangle *page_area,
3598                GtkBorder    *border,
3599                GdkRectangle *expose_area,
3600                gboolean     *page_ready)
3601 {
3602         GdkRectangle overlap;
3603         GdkRectangle real_page_area;
3604
3605         g_assert (view->document);
3606
3607         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
3608                 return;
3609
3610         /* Render the document itself */
3611         real_page_area = *page_area;
3612
3613         real_page_area.x += border->left;
3614         real_page_area.y += border->top;
3615         real_page_area.width -= (border->left + border->right);
3616         real_page_area.height -= (border->top + border->bottom);
3617         *page_ready = TRUE;
3618
3619         if (!view->presentation) {
3620                 gint current_page;
3621
3622                 current_page = ev_page_cache_get_current_page (view->page_cache);
3623                 ev_document_misc_paint_one_page (view->layout.bin_window,
3624                                                  GTK_WIDGET (view),
3625                                                  page_area, border,
3626                                                  page == current_page);
3627         }
3628
3629         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
3630                 gint             width, height;
3631                 gint             page_width, page_height;
3632                 cairo_surface_t *page_surface = NULL;
3633                 gint             selection_width, selection_height;
3634                 cairo_surface_t *selection_surface = NULL;
3635
3636                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
3637
3638                 if (!page_surface) {
3639                         if (!view->presentation) {
3640                                 draw_loading_text (view,
3641                                                    &real_page_area,
3642                                                    expose_area);
3643                         }
3644
3645                         *page_ready = FALSE;
3646
3647                         return;
3648                 }
3649
3650                 ev_page_cache_get_size (view->page_cache,
3651                                         page, view->rotation,
3652                                         view->scale,
3653                                         &width, &height);
3654
3655                 page_width = cairo_image_surface_get_width (page_surface);
3656                 page_height = cairo_image_surface_get_height (page_surface);
3657
3658                 cairo_save (cr);
3659                 cairo_translate (cr, overlap.x, overlap.y);
3660
3661                 if (width != page_width || height != page_height) {
3662                         cairo_pattern_set_filter (cairo_get_source (cr),
3663                                                   CAIRO_FILTER_FAST);
3664                         cairo_scale (cr,
3665                                      (gdouble)width / page_width,
3666                                      (gdouble)height / page_height);
3667                 }
3668
3669                 cairo_surface_set_device_offset (page_surface,
3670                                                  overlap.x - real_page_area.x,
3671                                                  overlap.y - real_page_area.y);
3672                 cairo_set_source_surface (cr, page_surface, 0, 0);
3673                 cairo_paint (cr);
3674                 cairo_restore (cr);
3675
3676                 /* Get the selection pixbuf iff we have something to draw */
3677                 if (find_selection_for_page (view, page) &&
3678                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
3679                         selection_surface =
3680                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
3681                                                                        page,
3682                                                                        view->scale,
3683                                                                        NULL);
3684                 }
3685
3686                 if (!selection_surface) {
3687                         return;
3688                 }
3689
3690                 selection_width = cairo_image_surface_get_width (selection_surface);
3691                 selection_height = cairo_image_surface_get_height (selection_surface);
3692
3693                 cairo_save (cr);
3694                 cairo_translate (cr, overlap.x, overlap.y);
3695
3696                 if (width != selection_width || height != selection_height) {
3697                         cairo_pattern_set_filter (cairo_get_source (cr),
3698                                                   CAIRO_FILTER_FAST);
3699                         cairo_scale (cr,
3700                                      (gdouble)width / selection_width,
3701                                      (gdouble)height / selection_height);
3702                 }
3703
3704                 cairo_surface_set_device_offset (selection_surface,
3705                                                  overlap.x - real_page_area.x,
3706                                                  overlap.y - real_page_area.y);
3707                 cairo_set_source_surface (cr, selection_surface, 0, 0);
3708                 cairo_paint (cr);
3709                 cairo_restore (cr);
3710         }
3711 }
3712
3713 /*** GObject functions ***/
3714
3715 static void
3716 ev_view_finalize (GObject *object)
3717 {
3718         EvView *view = EV_VIEW (object);
3719
3720         clear_selection (view);
3721         clear_link_selected (view);
3722
3723         if (view->image_dnd_info.image)
3724                 g_object_unref (view->image_dnd_info.image);
3725         view->image_dnd_info.image = NULL;
3726
3727         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
3728 }
3729
3730 static void
3731 ev_view_destroy (GtkObject *object)
3732 {
3733         EvView *view = EV_VIEW (object);
3734
3735         if (view->document) {
3736                 g_object_unref (view->document);
3737                 view->document = NULL;
3738         }
3739
3740         if (view->pixbuf_cache) {
3741                 g_object_unref (view->pixbuf_cache);
3742                 view->pixbuf_cache = NULL;
3743         }
3744
3745         if (view->goto_window) {
3746                 gtk_widget_destroy (view->goto_window);
3747                 view->goto_window = NULL;
3748                 view->goto_entry = NULL;
3749         }
3750
3751         if (view->selection_scroll_id) {
3752             g_source_remove (view->selection_scroll_id);
3753             view->selection_scroll_id = 0;
3754         }
3755
3756         if (view->selection_update_id) {
3757             g_source_remove (view->selection_update_id);
3758             view->selection_update_id = 0;
3759         }
3760
3761         if (view->loading_text) {
3762                 cairo_surface_destroy (view->loading_text);
3763                 view->loading_text = NULL;
3764         }
3765
3766         if (view->scroll_info.timeout_id) {
3767             g_source_remove (view->scroll_info.timeout_id);
3768             view->scroll_info.timeout_id = 0;
3769         }
3770
3771         if (view->drag_info.drag_timeout_id) {
3772                 g_source_remove (view->drag_info.drag_timeout_id);
3773                 view->drag_info.drag_timeout_id = 0;
3774         }
3775
3776         if (view->drag_info.release_timeout_id) {
3777                 g_source_remove (view->drag_info.release_timeout_id);
3778                 view->drag_info.release_timeout_id = 0;
3779         }
3780
3781         ev_view_presentation_transition_stop (view);
3782
3783         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
3784
3785         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
3786 }
3787
3788 static void
3789 ev_view_set_property (GObject      *object,
3790                       guint         prop_id,
3791                       const GValue *value,
3792                       GParamSpec   *pspec)
3793 {
3794         EvView *view = EV_VIEW (object);
3795
3796         switch (prop_id) {
3797                 case PROP_CONTINUOUS:
3798                         ev_view_set_continuous (view, g_value_get_boolean (value));
3799                         break;
3800                 case PROP_DUAL_PAGE:
3801                         ev_view_set_dual_page (view, g_value_get_boolean (value));
3802                         break;
3803                 case PROP_FULLSCREEN:
3804                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
3805                         break;
3806                 case PROP_PRESENTATION:
3807                         ev_view_set_presentation (view, g_value_get_boolean (value));
3808                         break;
3809                 case PROP_SIZING_MODE:
3810                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
3811                         break;
3812                 case PROP_ZOOM:
3813                         ev_view_set_zoom (view, g_value_get_double (value), FALSE);
3814                         break;
3815                 case PROP_ROTATION:
3816                         ev_view_set_rotation (view, g_value_get_int (value));
3817                         break;
3818                 default:
3819                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
3820         }
3821 }
3822
3823 static AtkObject *
3824 ev_view_get_accessible (GtkWidget *widget)
3825 {
3826         static gboolean first_time = TRUE;
3827
3828         if (first_time) {
3829                 AtkObjectFactory *factory;
3830                 AtkRegistry *registry;
3831                 GType derived_type;
3832                 GType derived_atk_type;
3833
3834                 /*
3835                  * Figure out whether accessibility is enabled by looking at the
3836                  * type of the accessible object which would be created for
3837                  * the parent type of EvView.
3838                  */
3839                 derived_type = g_type_parent (EV_TYPE_VIEW);
3840
3841                 registry = atk_get_default_registry ();
3842                 factory = atk_registry_get_factory (registry,
3843                                                     derived_type);
3844                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
3845                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
3846                         atk_registry_set_factory_type (registry,
3847                                                        EV_TYPE_VIEW,
3848                                                        ev_view_accessible_factory_get_type ());
3849                 first_time = FALSE;
3850         }
3851         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
3852 }
3853
3854 static void
3855 ev_view_get_property (GObject *object,
3856                       guint prop_id,
3857                       GValue *value,
3858                       GParamSpec *pspec)
3859 {
3860         EvView *view = EV_VIEW (object);
3861
3862         switch (prop_id) {
3863                 case PROP_CONTINUOUS:
3864                         g_value_set_boolean (value, view->continuous);
3865                         break;
3866                 case PROP_DUAL_PAGE:
3867                         g_value_set_boolean (value, view->dual_page);
3868                         break;
3869                 case PROP_FULLSCREEN:
3870                         g_value_set_boolean (value, view->fullscreen);
3871                         break;
3872                 case PROP_PRESENTATION:
3873                         g_value_set_boolean (value, view->presentation);
3874                         break;
3875                 case PROP_SIZING_MODE:
3876                         g_value_set_enum (value, view->sizing_mode);
3877                         break;
3878                 case PROP_ZOOM:
3879                         g_value_set_double (value, view->scale);
3880                         break;
3881                 case PROP_ROTATION:
3882                         g_value_set_int (value, view->rotation);
3883                         break;
3884                 case PROP_HAS_SELECTION:
3885                         g_value_set_boolean (value,
3886                                              view->selection_info.selections != NULL);
3887                         break;
3888                 default:
3889                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
3890         }
3891 }
3892
3893 static void
3894 ev_view_class_init (EvViewClass *class)
3895 {
3896         GObjectClass *object_class = G_OBJECT_CLASS (class);
3897         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
3898         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
3899         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
3900         GtkBindingSet *binding_set;
3901
3902         object_class->finalize = ev_view_finalize;
3903         object_class->set_property = ev_view_set_property;
3904         object_class->get_property = ev_view_get_property;
3905
3906         widget_class->expose_event = ev_view_expose_event;
3907         widget_class->button_press_event = ev_view_button_press_event;
3908         widget_class->motion_notify_event = ev_view_motion_notify_event;
3909         widget_class->button_release_event = ev_view_button_release_event;
3910         widget_class->key_press_event = ev_view_key_press_event;
3911         widget_class->focus_in_event = ev_view_focus_in;
3912         widget_class->focus_out_event = ev_view_focus_out;
3913         widget_class->get_accessible = ev_view_get_accessible;
3914         widget_class->size_request = ev_view_size_request;
3915         widget_class->size_allocate = ev_view_size_allocate;
3916         widget_class->realize = ev_view_realize;
3917         widget_class->scroll_event = ev_view_scroll_event;
3918         widget_class->enter_notify_event = ev_view_enter_notify_event;
3919         widget_class->leave_notify_event = ev_view_leave_notify_event;
3920         widget_class->style_set = ev_view_style_set;
3921         widget_class->drag_data_get = ev_view_drag_data_get;
3922         widget_class->drag_motion = ev_view_drag_motion;
3923         widget_class->popup_menu = ev_view_popup_menu;
3924         widget_class->query_tooltip = ev_view_query_tooltip;
3925
3926         gtk_object_class->destroy = ev_view_destroy;
3927
3928         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
3929
3930         class->binding_activated = ev_view_scroll;
3931
3932         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
3933                          G_TYPE_FROM_CLASS (object_class),
3934                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
3935                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
3936                          NULL, NULL,
3937                          ev_view_marshal_VOID__ENUM_BOOLEAN,
3938                          G_TYPE_NONE, 2,
3939                          GTK_TYPE_SCROLL_TYPE,
3940                          G_TYPE_BOOLEAN);
3941
3942         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
3943                          G_TYPE_FROM_CLASS (object_class),
3944                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
3945                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
3946                          NULL, NULL,
3947                          g_cclosure_marshal_VOID__VOID,
3948                          G_TYPE_NONE, 0, G_TYPE_NONE);
3949         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
3950                          G_TYPE_FROM_CLASS (object_class),
3951                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
3952                          G_STRUCT_OFFSET (EvViewClass, handle_link),
3953                          NULL, NULL,
3954                          g_cclosure_marshal_VOID__OBJECT,
3955                          G_TYPE_NONE, 1,
3956                          G_TYPE_OBJECT);
3957         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
3958                          G_TYPE_FROM_CLASS (object_class),
3959                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
3960                          G_STRUCT_OFFSET (EvViewClass, external_link),
3961                          NULL, NULL,
3962                          g_cclosure_marshal_VOID__OBJECT,
3963                          G_TYPE_NONE, 1,
3964                          G_TYPE_OBJECT);
3965         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
3966                          G_TYPE_FROM_CLASS (object_class),
3967                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
3968                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
3969                          NULL, NULL,
3970                          g_cclosure_marshal_VOID__OBJECT,
3971                          G_TYPE_NONE, 1,
3972                          G_TYPE_OBJECT);
3973
3974
3975         g_object_class_install_property (object_class,
3976                                          PROP_CONTINUOUS,
3977                                          g_param_spec_boolean ("continuous",
3978                                                                "Continuous",
3979                                                                "Continuous scrolling mode",
3980                                                                TRUE,
3981                                                                G_PARAM_READWRITE));
3982
3983         g_object_class_install_property (object_class,
3984                                          PROP_DUAL_PAGE,
3985                                          g_param_spec_boolean ("dual-page",
3986                                                                "Dual Page",
3987                                                                "Two pages visible at once",
3988                                                                FALSE,
3989                                                                G_PARAM_READWRITE));
3990         g_object_class_install_property (object_class,
3991                                          PROP_FULLSCREEN,
3992                                          g_param_spec_boolean ("fullscreen",
3993                                                                "Full Screen",
3994                                                                "Draw page in a fullscreen fashion",
3995                                                                FALSE,
3996                                                                G_PARAM_READWRITE));
3997         g_object_class_install_property (object_class,
3998                                          PROP_PRESENTATION,
3999                                          g_param_spec_boolean ("presentation",
4000                                                                "Presentation",
4001                                                                "Draw page in presentation mode",
4002                                                                TRUE,
4003                                                                G_PARAM_READWRITE));
4004
4005         g_object_class_install_property (object_class,
4006                                          PROP_SIZING_MODE,
4007                                          g_param_spec_enum ("sizing-mode",
4008                                                             "Sizing Mode",
4009                                                             "Sizing Mode",
4010                                                             EV_TYPE_SIZING_MODE,
4011                                                             EV_SIZING_FIT_WIDTH,
4012                                                             G_PARAM_READWRITE));
4013
4014         g_object_class_install_property (object_class,
4015                                          PROP_ZOOM,
4016                                          g_param_spec_double ("zoom",
4017                                                               "Zoom factor",
4018                                                               "Zoom factor",
4019                                                               0,
4020                                                               G_MAXDOUBLE,
4021                                                               1.0,
4022                                                               G_PARAM_READWRITE));
4023         g_object_class_install_property (object_class,
4024                                          PROP_ROTATION,
4025                                          g_param_spec_double ("rotation",
4026                                                               "Rotation",
4027                                                               "Rotation",
4028                                                               0,
4029                                                               360,
4030                                                               0,
4031                                                               G_PARAM_READWRITE));
4032         g_object_class_install_property (object_class,
4033                                          PROP_HAS_SELECTION,
4034                                          g_param_spec_boolean ("has-selection",
4035                                                                "Has selection",
4036                                                                "The view has selections",
4037                                                                FALSE,
4038                                                                G_PARAM_READABLE));
4039
4040         binding_set = gtk_binding_set_by_class (class);
4041
4042         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4043         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4044         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4045         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4046         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4047         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4048         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4049         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4050         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4051                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4052         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4053                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4054         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4055                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4056         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4057                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4058
4059 }
4060
4061 static void
4062 ev_view_init (EvView *view)
4063 {
4064         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4065
4066         view->spacing = 5;
4067         view->scale = 1.0;
4068         view->current_page = 0;
4069         view->pressed_button = -1;
4070         view->cursor = EV_VIEW_CURSOR_NORMAL;
4071         view->drag_info.in_drag = FALSE;
4072         view->scroll_info.autoscrolling = FALSE;
4073         view->selection_info.selections = NULL;
4074         view->selection_info.in_selection = FALSE;
4075         view->selection_info.in_drag = FALSE;
4076         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4077         view->continuous = TRUE;
4078         view->dual_page = FALSE;
4079         view->presentation = FALSE;
4080         view->presentation_state = EV_PRESENTATION_NORMAL;
4081         view->fullscreen = FALSE;
4082         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4083         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4084         view->jump_to_find_result = TRUE;
4085         view->highlight_find_results = FALSE;
4086
4087         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4088         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4089 }
4090
4091 /*** Callbacks ***/
4092
4093 static void
4094 ev_view_change_page (EvView *view,
4095                      gint    new_page,
4096                      gboolean start_transition)
4097 {
4098         gint x, y;
4099
4100         view->current_page = new_page;
4101         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4102
4103         if (view->presentation && start_transition)
4104                 ev_view_presentation_transition_start (view);
4105
4106         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4107         ev_view_handle_cursor_over_xy (view, x, y);
4108
4109         gtk_widget_queue_resize (GTK_WIDGET (view));
4110 }
4111
4112 static void
4113 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4114                                      EvView                *view)
4115 {
4116         g_object_unref (view->animation);
4117         view->animation = NULL;
4118         ev_view_change_page (view, view->current_page, TRUE);
4119 }
4120
4121 /**
4122  * ev_view_transition_animation_cancel:
4123  * @animation: Animation to finish
4124  * @view: An EvView
4125  *
4126  * Does almost the same as cancel, but without scheduling the transition.
4127  */
4128
4129 static void
4130 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4131                                      EvView                *view)
4132 {
4133         g_object_unref (view->animation);
4134         view->animation = NULL;
4135         ev_view_change_page (view, view->current_page, FALSE);
4136 }
4137
4138 static void
4139 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4140                                     gdouble                progress,
4141                                     EvView                *view)
4142 {
4143         gtk_widget_queue_draw (GTK_WIDGET (view));
4144 }
4145
4146 static void
4147 ev_view_presentation_animation_start (EvView *view,
4148                                       int     new_page)
4149 {
4150         EvTransitionEffect *effect = NULL;
4151         cairo_surface_t *surface;
4152
4153         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4154                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4155                                                             view->current_page);
4156         if (!effect)
4157                 return;
4158
4159         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4160         view->animation = ev_transition_animation_new (effect);
4161         ev_transition_animation_set_origin_surface (view->animation, surface);
4162
4163         g_signal_connect (view->animation, "frame",
4164                           G_CALLBACK (ev_view_transition_animation_frame), view);
4165         g_signal_connect (view->animation, "finished",
4166                           G_CALLBACK (ev_view_transition_animation_finish), view);
4167 }
4168
4169 static void
4170 job_finished_cb (EvPixbufCache *pixbuf_cache,
4171                  GdkRegion     *region,
4172                  EvView        *view)
4173 {
4174         if (view->animation) {
4175                 cairo_surface_t *surface;
4176
4177                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4178                 ev_transition_animation_set_dest_surface (view->animation, surface);
4179         }
4180
4181         if (region) {
4182                 gdk_window_invalidate_region (view->layout.bin_window,
4183                                               region, TRUE);
4184         } else {
4185                 gtk_widget_queue_draw (GTK_WIDGET (view));
4186         }
4187 }
4188
4189 static void
4190 page_changed_cb (EvPageCache *page_cache,
4191                  int          new_page,
4192                  EvView      *view)
4193 {
4194         if (view->current_page != new_page) {
4195                 if (view->presentation)
4196                         ev_view_presentation_animation_start (view, new_page);
4197
4198                 ev_view_change_page (view, new_page, TRUE);
4199         } else {
4200                 gtk_widget_queue_draw (GTK_WIDGET (view));
4201         }
4202
4203         view->find_result = 0;
4204 }
4205
4206 static void
4207 on_adjustment_value_changed (GtkAdjustment *adjustment,
4208                              EvView        *view)
4209 {
4210         int dx = 0, dy = 0;
4211         gint x, y;
4212         GList *children, *l;
4213
4214         if (! GTK_WIDGET_REALIZED (view))
4215                 return;
4216
4217         if (view->hadjustment) {
4218                 dx = view->scroll_x - (int) view->hadjustment->value;
4219                 view->scroll_x = (int) view->hadjustment->value;
4220         } else {
4221                 view->scroll_x = 0;
4222         }
4223
4224         if (view->vadjustment) {
4225                 dy = view->scroll_y - (int) view->vadjustment->value;
4226                 view->scroll_y = (int) view->vadjustment->value;
4227         } else {
4228                 view->scroll_y = 0;
4229         }
4230
4231         children = gtk_container_get_children (GTK_CONTAINER (view));
4232         for (l = children; l && l->data; l = g_list_next (l)) {
4233                 gint       child_x, child_y;
4234                 GtkWidget *child = (GtkWidget *)l->data;
4235
4236                 gtk_container_child_get (GTK_CONTAINER (view),
4237                                          child,
4238                                          "x", &child_x,
4239                                          "y", &child_y,
4240                                          NULL);
4241                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4242         }
4243         g_list_free (children);
4244
4245         if (view->pending_resize)
4246                 gtk_widget_queue_draw (GTK_WIDGET (view));
4247         else
4248                 gdk_window_scroll (view->layout.bin_window, dx, dy);
4249
4250         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4251         ev_view_handle_cursor_over_xy (view, x, y);
4252
4253         if (view->document)
4254                 view_update_range_and_current_page (view);
4255 }
4256
4257 GtkWidget*
4258 ev_view_new (void)
4259 {
4260         GtkWidget *view;
4261
4262         view = g_object_new (EV_TYPE_VIEW, NULL);
4263
4264         return view;
4265 }
4266
4267 static void
4268 setup_caches (EvView *view)
4269 {
4270         view->page_cache = ev_page_cache_get (view->document);
4271         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
4272         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
4273         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4274         page_changed_cb (view->page_cache,
4275                          ev_page_cache_get_current_page (view->page_cache),
4276                          view);
4277 }
4278
4279 static void
4280 clear_caches (EvView *view)
4281 {
4282         if (view->pixbuf_cache) {
4283                 g_object_unref (view->pixbuf_cache);
4284                 view->pixbuf_cache = NULL;
4285         }
4286
4287         if (view->page_cache) {
4288                 view->page_cache = NULL;
4289         }
4290 }
4291
4292 void
4293 ev_view_set_loading (EvView       *view,
4294                      gboolean      loading)
4295 {
4296         view->loading = loading;
4297         gtk_widget_queue_draw (GTK_WIDGET (view));
4298 }
4299
4300 static gboolean
4301 ev_view_autoscroll_cb (EvView *view)
4302 {
4303         gdouble speed, value;
4304
4305         /* If the user stops autoscrolling, autoscrolling will be
4306          * set to false but the timeout will continue; stop the timeout: */
4307         if (!view->scroll_info.autoscrolling) {
4308                 view->scroll_info.timeout_id = 0;
4309                 return FALSE;
4310         }
4311
4312         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4313                 (view->scroll_info.last_y < view->scroll_info.start_y))
4314                 return TRUE;
4315
4316         /* Replace 100 with your speed of choice: The lower the faster.
4317          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4318          *      based on the distance of the starting point from the mouse
4319          * (All also effected by the timeout interval of this callback) */
4320
4321         if (view->scroll_info.start_y > view->scroll_info.last_y)
4322                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
4323         else
4324                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
4325
4326         value = gtk_adjustment_get_value (view->vadjustment);
4327         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
4328         gtk_adjustment_set_value (view->vadjustment, value);
4329
4330         return TRUE;
4331
4332 }
4333
4334 void
4335 ev_view_autoscroll_start (EvView *view)
4336 {
4337         gint x, y;
4338
4339         g_return_if_fail (EV_IS_VIEW (view));
4340
4341         if (view->scroll_info.autoscrolling)
4342                 return;
4343
4344         view->scroll_info.autoscrolling = TRUE;
4345         view->scroll_info.timeout_id =
4346                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
4347                                view);
4348
4349         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4350         ev_view_handle_cursor_over_xy (view, x, y);
4351 }
4352
4353 void
4354 ev_view_autoscroll_stop (EvView *view)
4355 {
4356         gint x, y;
4357
4358         g_return_if_fail (EV_IS_VIEW (view));
4359
4360         if (!view->scroll_info.autoscrolling)
4361                 return;
4362
4363         view->scroll_info.autoscrolling = FALSE;
4364         if (view->scroll_info.timeout_id) {
4365                 g_source_remove (view->scroll_info.timeout_id);
4366                 view->scroll_info.timeout_id = 0;
4367         }
4368
4369         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4370         ev_view_handle_cursor_over_xy (view, x, y);
4371 }
4372
4373 void
4374 ev_view_set_document (EvView     *view,
4375                       EvDocument *document)
4376 {
4377         g_return_if_fail (EV_IS_VIEW (view));
4378
4379         view->loading = FALSE;
4380
4381         if (document != view->document) {
4382                 clear_caches (view);
4383
4384                 if (view->document) {
4385                         g_object_unref (view->document);
4386                         view->page_cache = NULL;
4387                 }
4388
4389                 view->document = document;
4390                 view->find_result = 0;
4391
4392                 if (view->document) {
4393                         g_object_ref (view->document);
4394                         setup_caches (view);
4395                 }
4396
4397                 gtk_widget_queue_resize (GTK_WIDGET (view));
4398         }
4399 }
4400
4401 static void
4402 ev_view_reload_page (EvView    *view,
4403                      gint       page,
4404                      GdkRegion *region)
4405 {
4406         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
4407                                      region,
4408                                      page,
4409                                      view->rotation,
4410                                      view->scale);
4411 }
4412
4413 void
4414 ev_view_reload (EvView *view)
4415 {
4416         ev_pixbuf_cache_clear (view->pixbuf_cache);
4417         view_update_range_and_current_page (view);
4418 }
4419
4420 /*** Zoom and sizing mode ***/
4421
4422 #define EPSILON 0.0000001
4423 void
4424 ev_view_set_zoom (EvView   *view,
4425                   double    factor,
4426                   gboolean  relative)
4427 {
4428         double scale;
4429
4430         if (relative)
4431                 scale = view->scale * factor;
4432         else
4433                 scale = factor;
4434
4435         scale = CLAMP (scale,
4436                        view->sizing_mode == EV_SIZING_FREE ? view->min_scale : 0,
4437                        view->max_scale);
4438
4439         if (ABS (view->scale - scale) < EPSILON)
4440                 return;
4441
4442         if (view->loading_text) {
4443                 cairo_surface_destroy (view->loading_text);
4444                 view->loading_text = NULL;
4445         }
4446
4447         view->scale = scale;
4448         view->pending_resize = TRUE;
4449
4450         gtk_widget_queue_resize (GTK_WIDGET (view));
4451
4452         g_object_notify (G_OBJECT (view), "zoom");
4453 }
4454
4455 double
4456 ev_view_get_zoom (EvView *view)
4457 {
4458         return view->scale;
4459 }
4460
4461 void
4462 ev_view_set_screen_dpi (EvView  *view,
4463                         gdouble  dpi)
4464 {
4465         g_return_if_fail (EV_IS_VIEW (view));
4466         g_return_if_fail (dpi > 0);
4467
4468         view->dpi = dpi;
4469         view->min_scale = MIN_SCALE * dpi / 72.0;
4470         view->max_scale = MAX_SCALE * dpi / 72.0;
4471 }
4472
4473 gboolean
4474 ev_view_get_continuous (EvView *view)
4475 {
4476         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4477
4478         return view->continuous;
4479 }
4480
4481 void
4482 ev_view_set_continuous (EvView   *view,
4483                         gboolean  continuous)
4484 {
4485         g_return_if_fail (EV_IS_VIEW (view));
4486
4487         continuous = continuous != FALSE;
4488
4489         if (view->continuous != continuous) {
4490                 view->continuous = continuous;
4491                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4492                 gtk_widget_queue_resize (GTK_WIDGET (view));
4493         }
4494
4495         g_object_notify (G_OBJECT (view), "continuous");
4496 }
4497
4498 gboolean
4499 ev_view_get_dual_page (EvView *view)
4500 {
4501         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4502
4503         return view->dual_page;
4504 }
4505
4506 void
4507 ev_view_set_dual_page (EvView   *view,
4508                        gboolean  dual_page)
4509 {
4510         g_return_if_fail (EV_IS_VIEW (view));
4511
4512         dual_page = dual_page != FALSE;
4513
4514         if (view->dual_page == dual_page)
4515                 return;
4516
4517         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4518         view->dual_page = dual_page;
4519         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
4520          * preload_cache_size to be 2 if dual_page is set.
4521          */
4522         gtk_widget_queue_resize (GTK_WIDGET (view));
4523
4524         g_object_notify (G_OBJECT (view), "dual-page");
4525 }
4526
4527 void
4528 ev_view_set_fullscreen (EvView   *view,
4529                          gboolean  fullscreen)
4530 {
4531         g_return_if_fail (EV_IS_VIEW (view));
4532
4533         fullscreen = fullscreen != FALSE;
4534
4535         if (view->fullscreen == fullscreen)
4536                 return;
4537
4538         view->fullscreen = fullscreen;
4539         gtk_widget_queue_resize (GTK_WIDGET (view));
4540
4541         g_object_notify (G_OBJECT (view), "fullscreen");
4542 }
4543
4544 gboolean
4545 ev_view_get_fullscreen (EvView *view)
4546 {
4547         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4548
4549         return view->fullscreen;
4550 }
4551
4552 void
4553 ev_view_set_presentation (EvView   *view,
4554                           gboolean  presentation)
4555 {
4556         g_return_if_fail (EV_IS_VIEW (view));
4557
4558         presentation = presentation != FALSE;
4559
4560         if (view->presentation == presentation)
4561                 return;
4562
4563         if (!presentation)
4564                 view->presentation_state = EV_PRESENTATION_NORMAL;
4565
4566         view->presentation = presentation;
4567         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4568
4569         if (presentation) {
4570                 view->sizing_mode_saved = view->sizing_mode;
4571                 view->scale_saved = view->scale;
4572                 ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
4573         } else {
4574                 ev_view_set_sizing_mode (view, view->sizing_mode_saved);
4575                 ev_view_set_zoom (view, view->scale_saved, FALSE);
4576         }
4577
4578         gtk_widget_queue_resize (GTK_WIDGET (view));
4579
4580         if (presentation)
4581                 ev_view_presentation_transition_start (view);
4582         else {
4583                 ev_view_presentation_transition_stop (view);
4584
4585                 if (view->animation) {
4586                         /* stop any running animation */
4587                         ev_view_transition_animation_cancel (view->animation, view);
4588                 }
4589         }
4590
4591         if (GTK_WIDGET_REALIZED (view)) {
4592                 if (view->presentation)
4593                         gdk_window_set_background (view->layout.bin_window,
4594                                                    &GTK_WIDGET (view)->style->black);
4595                 else
4596                         gdk_window_set_background (view->layout.bin_window,
4597                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
4598         }
4599
4600         g_object_notify (G_OBJECT (view), "presentation");
4601 }
4602
4603 gboolean
4604 ev_view_get_presentation (EvView *view)
4605 {
4606         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4607
4608         return view->presentation;
4609 }
4610
4611 static gboolean
4612 transition_next_page (EvView *view)
4613 {
4614         ev_view_next_page (view);
4615
4616         return FALSE;
4617 }
4618
4619 static void
4620 ev_view_presentation_transition_stop (EvView *view)
4621 {
4622         if (view->trans_timeout_id > 0)
4623                 g_source_remove (view->trans_timeout_id);
4624         view->trans_timeout_id = 0;
4625 }
4626
4627 static void
4628 ev_view_presentation_transition_start (EvView *view)
4629 {
4630         gdouble duration;
4631
4632         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
4633                 return;
4634
4635         ev_view_presentation_transition_stop (view);
4636
4637         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
4638                                                              view->current_page);
4639         if (duration > 0) {
4640                 view->trans_timeout_id =
4641                         g_timeout_add_seconds (duration,
4642                                                (GSourceFunc) transition_next_page,
4643                                                view);
4644         }
4645 }
4646
4647 void
4648 ev_view_set_sizing_mode (EvView       *view,
4649                          EvSizingMode  sizing_mode)
4650 {
4651         g_return_if_fail (EV_IS_VIEW (view));
4652
4653         if (view->sizing_mode == sizing_mode)
4654                 return;
4655
4656         view->sizing_mode = sizing_mode;
4657         gtk_widget_queue_resize (GTK_WIDGET (view));
4658
4659         g_object_notify (G_OBJECT (view), "sizing-mode");
4660 }
4661
4662 EvSizingMode
4663 ev_view_get_sizing_mode (EvView *view)
4664 {
4665         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
4666
4667         return view->sizing_mode;
4668 }
4669
4670 gboolean
4671 ev_view_can_zoom_in (EvView *view)
4672 {
4673         return view->scale * ZOOM_IN_FACTOR <= view->max_scale;
4674 }
4675
4676 gboolean
4677 ev_view_can_zoom_out (EvView *view)
4678 {
4679         return view->scale * ZOOM_OUT_FACTOR >= view->min_scale;
4680 }
4681
4682 void
4683 ev_view_zoom_in (EvView *view)
4684 {
4685         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
4686
4687         if (view->presentation)
4688                 return;
4689
4690         view->pending_scroll = SCROLL_TO_CENTER;
4691         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
4692 }
4693
4694 void
4695 ev_view_zoom_out (EvView *view)
4696 {
4697         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
4698
4699         if (view->presentation)
4700                 return;
4701
4702         view->pending_scroll = SCROLL_TO_CENTER;
4703         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
4704 }
4705
4706 void
4707 ev_view_rotate_right (EvView *view)
4708 {
4709         int rotation = view->rotation + 90;
4710
4711         if (rotation >= 360) {
4712                 rotation -= 360;
4713         }
4714
4715         ev_view_set_rotation (view, rotation);
4716 }
4717
4718 void
4719 ev_view_rotate_left (EvView *view)
4720 {
4721         int rotation = view->rotation - 90;
4722
4723         if (rotation < 0) {
4724                 rotation += 360;
4725         }
4726
4727         ev_view_set_rotation (view, rotation);
4728 }
4729
4730 void
4731 ev_view_set_rotation (EvView *view, int rotation)
4732 {
4733         view->rotation = rotation;
4734
4735         if (view->pixbuf_cache) {
4736                 ev_pixbuf_cache_clear (view->pixbuf_cache);
4737                 gtk_widget_queue_resize (GTK_WIDGET (view));
4738         }
4739
4740         if (rotation != 0)
4741                 clear_selection (view);
4742
4743         g_object_notify (G_OBJECT (view), "rotation");
4744 }
4745
4746 int
4747 ev_view_get_rotation (EvView *view)
4748 {
4749         return view->rotation;
4750 }
4751
4752 static double
4753 zoom_for_size_fit_width (int doc_width,
4754                          int doc_height,
4755                          int target_width,
4756                          int target_height,
4757                          int vsb_width)
4758 {
4759         double scale;
4760
4761         scale = (double)target_width / doc_width;
4762
4763         if (doc_height * scale > target_height)
4764                 scale = (double) (target_width - vsb_width) / doc_width;
4765
4766         return scale;
4767 }
4768
4769 static double
4770 zoom_for_size_fit_height (int doc_width,
4771                           int doc_height,
4772                           int target_width,
4773                           int target_height,
4774                           int vsb_height)
4775 {
4776         double scale;
4777
4778         scale = (double)target_height / doc_height;
4779
4780         if (doc_width * scale > target_width)
4781                 scale = (double) (target_height - vsb_height) / doc_height;
4782
4783         return scale;
4784 }
4785
4786 static double
4787 zoom_for_size_best_fit (int doc_width,
4788                         int doc_height,
4789                         int target_width,
4790                         int target_height,
4791                         int vsb_width,
4792                         int hsb_width)
4793 {
4794         double w_scale;
4795         double h_scale;
4796
4797         w_scale = (double)target_width / doc_width;
4798         h_scale = (double)target_height / doc_height;
4799
4800         if (doc_height * w_scale > target_height)
4801                 w_scale = (double) (target_width - vsb_width) / doc_width;
4802         if (doc_width * h_scale > target_width)
4803                 h_scale = (double) (target_height - hsb_width) / doc_height;
4804
4805         return MIN (w_scale, h_scale);
4806 }
4807
4808
4809 static void
4810 ev_view_zoom_for_size_presentation (EvView *view,
4811                                     int     width,
4812                                     int     height)
4813 {
4814         int doc_width, doc_height;
4815         gdouble scale;
4816
4817         ev_page_cache_get_size (view->page_cache,
4818                                 view->current_page,
4819                                 view->rotation,
4820                                 1.0,
4821                                 &doc_width,
4822                                 &doc_height);
4823         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
4824         ev_view_set_zoom (view, scale, FALSE);
4825 }
4826
4827 static void
4828 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
4829                            int     width,
4830                            int     height,
4831                            int     vsb_width,
4832                            int     hsb_height)
4833 {
4834         int doc_width, doc_height;
4835         GtkBorder border;
4836         gdouble scale;
4837
4838         ev_page_cache_get_max_width (view->page_cache,
4839                                      view->rotation,
4840                                      1.0,
4841                                      &doc_width);
4842         ev_page_cache_get_max_height (view->page_cache,
4843                                       view->rotation,
4844                                       1.0,
4845                                       &doc_height);
4846         compute_border (view, doc_width, doc_height, &border);
4847
4848         doc_width = doc_width * 2;
4849         width -= (2 * (border.left + border.right) + 3 * view->spacing);
4850         height -= (border.top + border.bottom + 2 * view->spacing - 1);
4851
4852         /* FIXME: We really need to calculate the overall height here, not the
4853          * page height.  We assume there's always a vertical scrollbar for
4854          * now.  We need to fix this. */
4855         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4856                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
4857         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4858                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
4859         else
4860                 g_assert_not_reached ();
4861
4862         ev_view_set_zoom (view, scale, FALSE);
4863 }
4864
4865 static void
4866 ev_view_zoom_for_size_continuous (EvView *view,
4867                                   int     width,
4868                                   int     height,
4869                                   int     vsb_width,
4870                                   int     hsb_height)
4871 {
4872         int doc_width, doc_height;
4873         GtkBorder border;
4874         gdouble scale;
4875
4876         ev_page_cache_get_max_width (view->page_cache,
4877                                      view->rotation,
4878                                      1.0,
4879                                      &doc_width);
4880         ev_page_cache_get_max_height (view->page_cache,
4881                                       view->rotation,
4882                                       1.0,
4883                                       &doc_height);
4884         compute_border (view, doc_width, doc_height, &border);
4885
4886         width -= (border.left + border.right + 2 * view->spacing);
4887         height -= (border.top + border.bottom + 2 * view->spacing - 1);
4888
4889         /* FIXME: We really need to calculate the overall height here, not the
4890          * page height.  We assume there's always a vertical scrollbar for
4891          * now.  We need to fix this. */
4892         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4893                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
4894         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4895                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
4896         else
4897                 g_assert_not_reached ();
4898
4899         ev_view_set_zoom (view, scale, FALSE);
4900 }
4901
4902 static void
4903 ev_view_zoom_for_size_dual_page (EvView *view,
4904                                  int     width,
4905                                  int     height,
4906                                  int     vsb_width,
4907                                  int     hsb_height)
4908 {
4909         GtkBorder border;
4910         gint doc_width, doc_height;
4911         gdouble scale;
4912         gint other_page;
4913
4914         other_page = view->current_page ^ 1;
4915
4916         /* Find the largest of the two. */
4917         ev_page_cache_get_size (view->page_cache,
4918                                 view->current_page,
4919                                 view->rotation,
4920                                 1.0,
4921                                 &doc_width, &doc_height);
4922
4923         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
4924                 gint width_2, height_2;
4925                 ev_page_cache_get_size (view->page_cache,
4926                                         other_page,
4927                                         view->rotation,
4928                                         1.0,
4929                                         &width_2, &height_2);
4930                 if (width_2 > doc_width)
4931                         doc_width = width_2;
4932                 if (height_2 > doc_height)
4933                         doc_height = height_2;
4934         }
4935         compute_border (view, doc_width, doc_height, &border);
4936
4937         doc_width = doc_width * 2;
4938         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
4939         height -= (border.top + border.bottom + 2 * view->spacing);
4940
4941         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4942                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
4943         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4944                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
4945         else
4946                 g_assert_not_reached ();
4947
4948         ev_view_set_zoom (view, scale, FALSE);
4949 }
4950
4951 static void
4952 ev_view_zoom_for_size_single_page (EvView *view,
4953                                    int     width,
4954                                    int     height,
4955                                    int     vsb_width,
4956                                    int     hsb_height)
4957 {
4958         int doc_width, doc_height;
4959         GtkBorder border;
4960         gdouble scale;
4961
4962         ev_page_cache_get_size (view->page_cache,
4963                                 view->current_page,
4964                                 view->rotation,
4965                                 1.0,
4966                                 &doc_width,
4967                                 &doc_height);
4968         /* Get an approximate border */
4969         compute_border (view, width, height, &border);
4970
4971         width -= (border.left + border.right + 2 * view->spacing);
4972         height -= (border.top + border.bottom + 2 * view->spacing);
4973
4974         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4975                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
4976         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4977                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
4978         else
4979                 g_assert_not_reached ();
4980
4981         ev_view_set_zoom (view, scale, FALSE);
4982 }
4983
4984 void
4985 ev_view_set_zoom_for_size (EvView *view,
4986                            int     width,
4987                            int     height,
4988                            int     vsb_width,
4989                            int     hsb_height)
4990 {
4991         g_return_if_fail (EV_IS_VIEW (view));
4992         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
4993                           view->sizing_mode == EV_SIZING_BEST_FIT);
4994         g_return_if_fail (width >= 0);
4995         g_return_if_fail (height >= 0);
4996
4997         if (view->document == NULL)
4998                 return;
4999
5000         if (view->presentation)
5001                 ev_view_zoom_for_size_presentation (view, width, height);
5002         else if (view->continuous && view->dual_page)
5003                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
5004         else if (view->continuous)
5005                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
5006         else if (view->dual_page)
5007                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
5008         else
5009                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
5010 }
5011
5012 /*** Find ***/
5013 static gint
5014 ev_view_find_get_n_results (EvView *view, gint page)
5015 {
5016         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5017 }
5018
5019 static EvRectangle *
5020 ev_view_find_get_result (EvView *view, gint page, gint result)
5021 {
5022         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5023 }
5024
5025 static void
5026 jump_to_find_result (EvView *view)
5027 {
5028         gint n_results;
5029         gint page = view->current_page;
5030
5031         n_results = ev_view_find_get_n_results (view, page);
5032
5033         if (n_results > 0 && view->find_result < n_results) {
5034                 EvRectangle *rect;
5035                 GdkRectangle view_rect;
5036
5037                 rect = ev_view_find_get_result (view, page, view->find_result);
5038                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5039                 ensure_rectangle_is_visible (view, &view_rect);
5040                 view->jump_to_find_result = FALSE;
5041         }
5042 }
5043
5044 /**
5045  * jump_to_find_page
5046  * @view: #EvView instance
5047  * @direction: Direction to look
5048  * @shift: Shift from current page
5049  *
5050  * Jumps to the first page that has occurences of searched word.
5051  * Uses a direction where to look and a shift from current page.
5052  *
5053  */
5054 static void
5055 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5056 {
5057         int n_pages, i;
5058
5059         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5060
5061         for (i = 0; i < n_pages; i++) {
5062                 int page;
5063
5064                 if (direction == EV_VIEW_FIND_NEXT)
5065                         page = view->current_page + i;
5066                 else
5067                         page = view->current_page - i;
5068                 page += shift;
5069
5070                 if (page >= n_pages) {
5071                         page = page - n_pages;
5072                 } else if (page < 0)
5073                         page = page + n_pages;
5074
5075                 if (ev_view_find_get_n_results (view, page) > 0) {
5076                         ev_page_cache_set_current_page (view->page_cache, page);
5077                         break;
5078                 }
5079         }
5080 }
5081
5082 void
5083 ev_view_find_changed (EvView *view, GList **results, gint page)
5084 {
5085         view->find_pages = results;
5086
5087         if (view->jump_to_find_result == TRUE) {
5088                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5089                 jump_to_find_result (view);
5090         }
5091
5092         if (view->current_page == page)
5093                 gtk_widget_queue_draw (GTK_WIDGET (view));
5094 }
5095
5096 void
5097 ev_view_find_next (EvView *view)
5098 {
5099         gint n_results;
5100
5101         n_results = ev_view_find_get_n_results (view, view->current_page);
5102         view->find_result++;
5103
5104         if (view->find_result >= n_results) {
5105                 view->find_result = 0;
5106                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5107                 jump_to_find_result (view);
5108         } else {
5109                 jump_to_find_result (view);
5110                 gtk_widget_queue_draw (GTK_WIDGET (view));
5111         }
5112 }
5113
5114 void
5115 ev_view_find_previous (EvView *view)
5116 {
5117         view->find_result--;
5118
5119         if (view->find_result < 0) {
5120                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5121                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5122                 jump_to_find_result (view);
5123         } else {
5124                 jump_to_find_result (view);
5125                 gtk_widget_queue_draw (GTK_WIDGET (view));
5126         }
5127 }
5128
5129 void
5130 ev_view_find_search_changed (EvView *view)
5131 {
5132         /* search string has changed, focus on new search result */
5133         view->jump_to_find_result = TRUE;
5134         view->find_pages = NULL;
5135 }
5136
5137 void
5138 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5139 {
5140         view->highlight_find_results = value;
5141         gtk_widget_queue_draw (GTK_WIDGET (view));
5142 }
5143
5144 void
5145 ev_view_find_cancel (EvView *view)
5146 {
5147         view->find_pages = NULL;
5148 }
5149
5150 /*** Selections ***/
5151
5152 /* compute_new_selection_rect/text calculates the area currently selected by
5153  * view_rect.  each handles a different mode;
5154  */
5155 static GList *
5156 compute_new_selection_rect (EvView       *view,
5157                             GdkPoint     *start,
5158                             GdkPoint     *stop)
5159 {
5160         GdkRectangle view_rect;
5161         int n_pages, i;
5162         GList *list = NULL;
5163
5164         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5165
5166         view_rect.x = MIN (start->x, stop->x);
5167         view_rect.y = MIN (start->y, stop->y);
5168         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5169         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5170
5171         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5172
5173         for (i = 0; i < n_pages; i++) {
5174                 GdkRectangle page_area;
5175                 GtkBorder border;
5176
5177                 if (get_page_extents (view, i, &page_area, &border)) {
5178                         GdkRectangle overlap;
5179
5180                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5181                                 EvViewSelection *selection;
5182
5183                                 selection = g_new0 (EvViewSelection, 1);
5184                                 selection->page = i;
5185                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5186                                                        &(selection->rect));
5187
5188                                 list = g_list_append (list, selection);
5189                         }
5190                 }
5191         }
5192
5193         return list;
5194 }
5195
5196 static gboolean
5197 gdk_rectangle_point_in (GdkRectangle *rectangle,
5198                         GdkPoint     *point)
5199 {
5200         return rectangle->x <= point->x &&
5201                 rectangle->y <= point->y &&
5202                 point->x < rectangle->x + rectangle->width &&
5203                 point->y < rectangle->y + rectangle->height;
5204 }
5205
5206 static GList *
5207 compute_new_selection_text (EvView          *view,
5208                             EvSelectionStyle style,
5209                             GdkPoint        *start,
5210                             GdkPoint        *stop)
5211 {
5212         int n_pages, i, first, last;
5213         GList *list = NULL;
5214         EvViewSelection *selection;
5215         gint width, height;
5216         int start_page, end_page;
5217
5218         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5219
5220         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5221
5222         /* First figure out the range of pages the selection
5223          * affects. */
5224         first = n_pages;
5225         last = 0;
5226         if (view->continuous) {
5227                 start_page = 0;
5228                 end_page = n_pages;
5229         } else if (view->dual_page) {
5230                 start_page = view->start_page;
5231                 end_page = view->end_page + 1;
5232         } else {
5233                 start_page = view->current_page;
5234                 end_page = view->current_page + 1;
5235         }
5236
5237         for (i = start_page; i < end_page; i++) {
5238                 GdkRectangle page_area;
5239                 GtkBorder border;
5240
5241                 get_page_extents (view, i, &page_area, &border);
5242                 if (gdk_rectangle_point_in (&page_area, start) ||
5243                     gdk_rectangle_point_in (&page_area, stop)) {
5244                         if (first == n_pages)
5245                                 first = i;
5246                         last = i;
5247                 }
5248
5249         }
5250
5251         /* Now create a list of EvViewSelection's for the affected
5252          * pages.  This could be an empty list, a list of just one
5253          * page or a number of pages.*/
5254         for (i = first; i < last + 1; i++) {
5255                 GdkRectangle page_area;
5256                 GtkBorder border;
5257                 GdkPoint *point;
5258
5259                 ev_page_cache_get_size (view->page_cache, i,
5260                                         view->rotation,
5261                                         1.0, &width, &height);
5262
5263                 selection = g_new0 (EvViewSelection, 1);
5264                 selection->page = i;
5265                 selection->style = style;
5266                 selection->rect.x1 = selection->rect.y1 = 0;
5267                 selection->rect.x2 = width;
5268                 selection->rect.y2 = height;
5269
5270                 get_page_extents (view, i, &page_area, &border);
5271
5272                 if (gdk_rectangle_point_in (&page_area, start))
5273                         point = start;
5274                 else
5275                         point = stop;
5276
5277                 if (i == first)
5278                         view_point_to_doc_point (view, point, &page_area,
5279                                                  &selection->rect.x1,
5280                                                  &selection->rect.y1);
5281
5282                 /* If the selection is contained within just one page,
5283                  * make sure we don't write 'start' into both points
5284                  * in selection->rect. */
5285                 if (first == last)
5286                         point = stop;
5287
5288                 if (i == last)
5289                         view_point_to_doc_point (view, point, &page_area,
5290                                                  &selection->rect.x2,
5291                                                  &selection->rect.y2);
5292
5293                 list = g_list_append (list, selection);
5294         }
5295
5296         return list;
5297 }
5298
5299 /* This function takes the newly calculated list, and figures out which regions
5300  * have changed.  It then queues a redraw approporiately.
5301  */
5302 static void
5303 merge_selection_region (EvView *view,
5304                         GList  *new_list)
5305 {
5306         GList *old_list;
5307         GList *new_list_ptr, *old_list_ptr;
5308
5309         /* Update the selection */
5310         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5311         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5312         g_list_free (view->selection_info.selections);
5313         view->selection_info.selections = new_list;
5314         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5315         g_object_notify (G_OBJECT (view), "has-selection");
5316
5317         new_list_ptr = new_list;
5318         old_list_ptr = old_list;
5319
5320         while (new_list_ptr || old_list_ptr) {
5321                 EvViewSelection *old_sel, *new_sel;
5322                 int cur_page;
5323                 GdkRegion *region = NULL;
5324
5325                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5326                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5327
5328                 /* Assume that the lists are in order, and we run through them
5329                  * comparing them, one page at a time.  We come out with the
5330                  * first page we see. */
5331                 if (new_sel && old_sel) {
5332                         if (new_sel->page < old_sel->page) {
5333                                 new_list_ptr = new_list_ptr->next;
5334                                 old_sel = NULL;
5335                         } else if (new_sel->page > old_sel->page) {
5336                                 old_list_ptr = old_list_ptr->next;
5337                                 new_sel = NULL;
5338                         } else {
5339                                 new_list_ptr = new_list_ptr->next;
5340                                 old_list_ptr = old_list_ptr->next;
5341                         }
5342                 } else if (new_sel) {
5343                         new_list_ptr = new_list_ptr->next;
5344                 } else if (old_sel) {
5345                         old_list_ptr = old_list_ptr->next;
5346                 }
5347
5348                 g_assert (new_sel || old_sel);
5349
5350                 /* is the page we're looking at on the screen?*/
5351                 cur_page = new_sel ? new_sel->page : old_sel->page;
5352                 if (cur_page < view->start_page || cur_page > view->end_page)
5353                         continue;
5354
5355                 /* seed the cache with a new page.  We are going to need the new
5356                  * region too. */
5357                 if (new_sel) {
5358                         GdkRegion *tmp_region = NULL;
5359
5360                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5361                                                                cur_page,
5362                                                                view->scale,
5363                                                                &tmp_region);
5364
5365                         if (tmp_region) {
5366                                 new_sel->covered_region = gdk_region_copy (tmp_region);
5367                         }
5368                 }
5369
5370                 /* Now we figure out what needs redrawing */
5371                 if (old_sel && new_sel) {
5372                         if (old_sel->covered_region && new_sel->covered_region) {
5373                                 /* We only want to redraw the areas that have
5374                                  * changed, so we xor the old and new regions
5375                                  * and redraw if it's different */
5376                                 region = gdk_region_copy (old_sel->covered_region);
5377                                 gdk_region_xor (region, new_sel->covered_region);
5378                                 if (gdk_region_empty (region)) {
5379                                         gdk_region_destroy (region);
5380                                         region = NULL;
5381                                 }
5382                         } else if (old_sel->covered_region) {
5383                                 region = gdk_region_copy (old_sel->covered_region);
5384                         } else if (new_sel->covered_region) {
5385                                 region = gdk_region_copy (new_sel->covered_region);
5386                         }
5387                 } else if (old_sel && !new_sel) {
5388                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
5389                                 region = gdk_region_copy (old_sel->covered_region);
5390                         }
5391                 } else if (!old_sel && new_sel) {
5392                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
5393                                 region = gdk_region_copy (new_sel->covered_region);
5394                         }
5395                 } else {
5396                         g_assert_not_reached ();
5397                 }
5398
5399                 /* Redraw the damaged region! */
5400                 if (region) {
5401                         GdkRectangle page_area;
5402                         GtkBorder border;
5403
5404                         /* I don't know why but the region is smaller
5405                          * than expected. This hack fixes it, I guess
5406                          * 10 pixels more won't hurt
5407                          */
5408                         gdk_region_shrink (region, -5, -5);
5409
5410                         get_page_extents (view, cur_page, &page_area, &border);
5411                         gdk_region_offset (region,
5412                                            page_area.x + border.left - view->scroll_x,
5413                                            page_area.y + border.top - view->scroll_y);
5414                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
5415                         gdk_region_destroy (region);
5416                 }
5417         }
5418
5419         /* Free the old list, now that we're done with it. */
5420         g_list_foreach (old_list, (GFunc) selection_free, NULL);
5421         g_list_free (old_list);
5422 }
5423
5424 static void
5425 compute_selections (EvView          *view,
5426                     EvSelectionStyle style,
5427                     GdkPoint        *start,
5428                     GdkPoint        *stop)
5429 {
5430         GList *list;
5431
5432         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
5433                 list = compute_new_selection_rect (view, start, stop);
5434         else
5435                 list = compute_new_selection_text (view, style, start, stop);
5436         merge_selection_region (view, list);
5437 }
5438
5439 /* Free's the selection.  It's up to the caller to queue redraws if needed.
5440  */
5441 static void
5442 selection_free (EvViewSelection *selection)
5443 {
5444         if (selection->covered_region)
5445                 gdk_region_destroy (selection->covered_region);
5446         g_free (selection);
5447 }
5448
5449 static void
5450 clear_selection (EvView *view)
5451 {
5452         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5453         g_list_free (view->selection_info.selections);
5454         view->selection_info.selections = NULL;
5455         view->selection_info.in_selection = FALSE;
5456         if (view->pixbuf_cache)
5457                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
5458         g_object_notify (G_OBJECT (view), "has-selection");
5459 }
5460
5461 void
5462 ev_view_select_all (EvView *view)
5463 {
5464         GList *selections = NULL;
5465         int n_pages, i;
5466
5467         /* Disable selection on rotated pages for the 0.4.0 series */
5468         if (view->rotation != 0)
5469                 return;
5470
5471         clear_selection (view);
5472
5473         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5474         for (i = 0; i < n_pages; i++) {
5475                 int width, height;
5476                 EvViewSelection *selection;
5477
5478                 ev_page_cache_get_size (view->page_cache,
5479                                         i,
5480                                         view->rotation,
5481                                         1.0, &width, &height);
5482
5483                 selection = g_new0 (EvViewSelection, 1);
5484                 selection->page = i;
5485                 selection->style = EV_SELECTION_STYLE_GLYPH;
5486                 selection->rect.x1 = selection->rect.y1 = 0;
5487                 selection->rect.x2 = width;
5488                 selection->rect.y2 = height;
5489
5490                 selections = g_list_append (selections, selection);
5491         }
5492
5493         merge_selection_region (view, selections);
5494         gtk_widget_queue_draw (GTK_WIDGET (view));
5495 }
5496
5497 gboolean
5498 ev_view_get_has_selection (EvView *view)
5499 {
5500         return view->selection_info.selections != NULL;
5501 }
5502
5503 static char *
5504 get_selected_text (EvView *view)
5505 {
5506         GString *text;
5507         GList *l;
5508         gchar *normalized_text;
5509         EvRenderContext *rc;
5510
5511         text = g_string_new (NULL);
5512         rc = ev_render_context_new (NULL, view->rotation, view->scale);
5513
5514         ev_document_doc_mutex_lock ();
5515
5516         for (l = view->selection_info.selections; l != NULL; l = l->next) {
5517                 EvViewSelection *selection = (EvViewSelection *)l->data;
5518                 EvPage *page;
5519                 gchar *tmp;
5520
5521                 page = ev_document_get_page (view->document, selection->page);
5522                 ev_render_context_set_page (rc, page);
5523                 g_object_unref (page);
5524
5525                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
5526                                                       rc, selection->style,
5527                                                       &(selection->rect));
5528
5529                 g_string_append (text, tmp);
5530                 g_free (tmp);
5531         }
5532
5533         g_object_unref (rc);
5534
5535         ev_document_doc_mutex_unlock ();
5536
5537         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
5538         g_string_free (text, TRUE);
5539         return normalized_text;
5540 }
5541
5542 static void
5543 ev_view_clipboard_copy (EvView      *view,
5544                         const gchar *text)
5545 {
5546         GtkClipboard *clipboard;
5547
5548         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
5549                                               GDK_SELECTION_CLIPBOARD);
5550         gtk_clipboard_set_text (clipboard, text, -1);
5551 }
5552
5553 void
5554 ev_view_copy (EvView *ev_view)
5555 {
5556         char *text;
5557
5558         if (!EV_IS_SELECTION (ev_view->document))
5559                 return;
5560
5561         text = get_selected_text (ev_view);
5562         ev_view_clipboard_copy (ev_view, text);
5563         g_free (text);
5564 }
5565
5566 static void
5567 ev_view_primary_get_cb (GtkClipboard     *clipboard,
5568                         GtkSelectionData *selection_data,
5569                         guint             info,
5570                         gpointer          data)
5571 {
5572         EvView *ev_view = EV_VIEW (data);
5573
5574         if (ev_view->link_selected) {
5575                 gtk_selection_data_set_text (selection_data,
5576                                              ev_link_action_get_uri (ev_view->link_selected),
5577                                              -1);
5578         } else if (EV_IS_SELECTION (ev_view->document) &&
5579                    ev_view->selection_info.selections) {
5580                 gchar *text;
5581
5582                 text = get_selected_text (ev_view);
5583                 if (text) {
5584                         gtk_selection_data_set_text (selection_data, text, -1);
5585                         g_free (text);
5586                 }
5587         }
5588 }
5589
5590 static void
5591 ev_view_primary_clear_cb (GtkClipboard *clipboard,
5592                           gpointer      data)
5593 {
5594         EvView *view = EV_VIEW (data);
5595
5596         clear_selection (view);
5597         clear_link_selected (view);
5598 }
5599
5600 static void
5601 ev_view_update_primary_selection (EvView *ev_view)
5602 {
5603         GtkClipboard *clipboard;
5604
5605         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
5606                                               GDK_SELECTION_PRIMARY);
5607
5608         if (ev_view->selection_info.selections || ev_view->link_selected) {
5609                 GtkTargetList *target_list;
5610                 GtkTargetEntry *targets;
5611                 int n_targets;
5612
5613                 target_list = gtk_target_list_new (NULL, 0);
5614                 gtk_target_list_add_text_targets (target_list, 0);
5615                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
5616                 gtk_target_list_unref (target_list);
5617
5618                 if (!gtk_clipboard_set_with_owner (clipboard,
5619                                                    targets, n_targets,
5620                                                    ev_view_primary_get_cb,
5621                                                    ev_view_primary_clear_cb,
5622                                                    G_OBJECT (ev_view)))
5623                         ev_view_primary_clear_cb (clipboard, ev_view);
5624
5625                 gtk_target_table_free (targets, n_targets);
5626         } else {
5627                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
5628                         gtk_clipboard_clear (clipboard);
5629         }
5630 }
5631
5632 static void
5633 clear_link_selected (EvView *view)
5634 {
5635         if (view->link_selected) {
5636                 g_object_unref (view->link_selected);
5637                 view->link_selected = NULL;
5638         }
5639 }
5640
5641 void
5642 ev_view_copy_link_address (EvView       *view,
5643                            EvLinkAction *action)
5644 {
5645         clear_link_selected (view);
5646
5647         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
5648
5649         view->link_selected = g_object_ref (action);
5650         ev_view_update_primary_selection (view);
5651 }
5652
5653 /*** Cursor operations ***/
5654
5655 static GdkCursor *
5656 ev_view_create_invisible_cursor(void)
5657 {
5658        GdkBitmap *empty;
5659        GdkColor black = { 0, 0, 0, 0 };
5660        static char bits[] = { 0x00 };
5661
5662        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
5663
5664        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
5665 }
5666
5667 static void
5668 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
5669 {
5670         GdkCursor *cursor = NULL;
5671         GdkDisplay *display;
5672         GtkWidget *widget;
5673
5674         if (view->cursor == new_cursor) {
5675                 return;
5676         }
5677
5678         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
5679         display = gtk_widget_get_display (widget);
5680         view->cursor = new_cursor;
5681
5682         switch (new_cursor) {
5683                 case EV_VIEW_CURSOR_NORMAL:
5684                         gdk_window_set_cursor (view->layout.bin_window, NULL);
5685                         break;
5686                 case EV_VIEW_CURSOR_IBEAM:
5687                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
5688                         break;
5689                 case EV_VIEW_CURSOR_LINK:
5690                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
5691                         break;
5692                 case EV_VIEW_CURSOR_WAIT:
5693                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
5694                         break;
5695                 case EV_VIEW_CURSOR_HIDDEN:
5696                         cursor = ev_view_create_invisible_cursor ();
5697                         break;
5698                 case EV_VIEW_CURSOR_DRAG:
5699                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
5700                         break;
5701                 case EV_VIEW_CURSOR_AUTOSCROLL:
5702                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
5703                         break;
5704         }
5705
5706         if (cursor) {
5707                 gdk_window_set_cursor (view->layout.bin_window, cursor);
5708                 gdk_cursor_unref (cursor);
5709                 gdk_flush();
5710         }
5711 }
5712
5713 void
5714 ev_view_hide_cursor (EvView *view)
5715 {
5716        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
5717 }
5718
5719 void
5720 ev_view_show_cursor (EvView *view)
5721 {
5722        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
5723 }
5724
5725 static void
5726 ev_view_reset_presentation_state (EvView *view)
5727 {
5728         if (!view->presentation ||
5729             view->presentation_state == EV_PRESENTATION_NORMAL)
5730                 return;
5731
5732         view->presentation_state = EV_PRESENTATION_NORMAL;
5733         gdk_window_set_background (view->layout.bin_window,
5734                                    &GTK_WIDGET (view)->style->black);
5735         gtk_widget_queue_draw (GTK_WIDGET (view));
5736 }
5737
5738 gboolean
5739 ev_view_next_page (EvView *view)
5740 {
5741         int page, n_pages;
5742
5743         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5744
5745         if (!view->page_cache)
5746                 return FALSE;
5747
5748         if (view->presentation &&
5749             (view->presentation_state == EV_PRESENTATION_BLACK ||
5750              view->presentation_state == EV_PRESENTATION_WHITE)) {
5751                 ev_view_reset_presentation_state (view);
5752                 return FALSE;
5753         }
5754
5755         if (view->animation) {
5756                 ev_view_transition_animation_cancel (view->animation, view);
5757         }
5758
5759         ev_view_presentation_transition_stop (view);
5760         ev_view_reset_presentation_state (view);
5761
5762         page = ev_page_cache_get_current_page (view->page_cache);
5763         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5764
5765         if (view->dual_page && !view->presentation)
5766                 page = page + 2;
5767         else
5768                 page = page + 1;
5769
5770         if (page < n_pages) {
5771                 ev_page_cache_set_current_page (view->page_cache, page);
5772                 return TRUE;
5773         } else if (view->presentation && page == n_pages) {
5774                 view->presentation_state = EV_PRESENTATION_END;
5775                 gtk_widget_queue_draw (GTK_WIDGET (view));
5776                 return TRUE;
5777         } else if (view->dual_page && page == n_pages) {
5778                 ev_page_cache_set_current_page (view->page_cache, page - 1);
5779                 return TRUE;
5780         } else {
5781                 return FALSE;
5782         }
5783 }
5784
5785 gboolean
5786 ev_view_previous_page (EvView *view)
5787 {
5788         int page;
5789
5790         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5791
5792         if (!view->page_cache)
5793                 return FALSE;
5794
5795         if (view->presentation &&
5796             view->presentation_state == EV_PRESENTATION_END) {
5797                 ev_view_reset_presentation_state (view);
5798                 return TRUE;
5799         }
5800
5801         if (view->presentation &&
5802             (view->presentation_state == EV_PRESENTATION_BLACK ||
5803              view->presentation_state == EV_PRESENTATION_WHITE)) {
5804                 ev_view_reset_presentation_state (view);
5805                 return FALSE;
5806         }
5807
5808         if (view->animation) {
5809                 ev_view_transition_animation_cancel (view->animation, view);
5810         }
5811
5812         ev_view_reset_presentation_state (view);
5813
5814         page = ev_page_cache_get_current_page (view->page_cache);
5815
5816         if (view->dual_page && !view->presentation)
5817                 page = page - 2;
5818         else
5819                 page = page - 1;
5820
5821         if (page >= 0) {
5822                 ev_page_cache_set_current_page (view->page_cache, page);
5823                 return TRUE;
5824         } else if (ev_view_get_dual_page (view) && page == -1) {
5825                 ev_page_cache_set_current_page (view->page_cache, 0);
5826                 return TRUE;
5827         } else {
5828                 return FALSE;
5829         }
5830 }
5831
5832 /*** Enum description for usage in signal ***/
5833
5834 GType
5835 ev_sizing_mode_get_type (void)
5836 {
5837   static GType etype = 0;
5838   if (etype == 0) {
5839     static const GEnumValue values[] = {
5840       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
5841       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
5842       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
5843       { 0, NULL, NULL }
5844     };
5845     etype = g_enum_register_static ("EvSizingMode", values);
5846   }
5847   return etype;
5848 }
5849
5850 void
5851 ev_view_update_view_size (EvView *view, GtkScrolledWindow * scrolled_window)
5852 {
5853         int width, height;
5854         GtkRequisition vsb_requisition;
5855         GtkRequisition hsb_requisition;
5856         int scrollbar_spacing;
5857
5858         /* Calculate the width available for the content */
5859         width  = GTK_WIDGET (scrolled_window)->allocation.width;
5860         height = GTK_WIDGET (scrolled_window)->allocation.height;
5861
5862         if (gtk_scrolled_window_get_shadow_type (scrolled_window) == GTK_SHADOW_IN
5863             && view) {
5864                 width -=  2 * GTK_WIDGET(view)->style->xthickness;
5865                 height -= 2 * GTK_WIDGET(view)->style->ythickness;
5866         }
5867
5868         gtk_widget_size_request (scrolled_window->vscrollbar, &vsb_requisition);
5869         gtk_widget_size_request (scrolled_window->hscrollbar, &hsb_requisition);
5870         gtk_widget_style_get (GTK_WIDGET (scrolled_window),
5871                               "scrollbar_spacing",
5872                               &scrollbar_spacing,
5873                               NULL);
5874
5875         if (EV_IS_VIEW(view)) {
5876                 ev_view_set_zoom_for_size (EV_VIEW (view),
5877                                            MAX (1, width),
5878                                            MAX (1, height),
5879                                            vsb_requisition.width + scrollbar_spacing,
5880                                            hsb_requisition.height + scrollbar_spacing);
5881         }
5882 }