libview/ev-view.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *  Copyright (C) 2004 Red Hat, Inc
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <math.h>
  25 #include <string.h>
  26
  27 #include <glib/gi18n-lib.h>
  28 #include <gtk/gtk.h>
  29 #include <gdk/gdkkeysyms.h>
  30
  31 #include "ev-document-forms.h"
  32 #include "ev-document-images.h"
  33 #include "ev-document-links.h"
  34 #include "ev-document-misc.h"
  35 #include "ev-document-transition.h"
  36 #include "ev-page-cache.h"
  37 #include "ev-pixbuf-cache.h"
  38 #include "ev-transition-animation.h"
  39 #include "ev-view-marshal.h"
  40 #include "ev-view.h"
  41 #include "ev-view-accessible.h"
  42 #include "ev-view-private.h"
  43 #include "ev-view-type-builtins.h"
  44
  45 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  46 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  47 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  48
  49 enum {
  50         PROP_0,
  51         PROP_CONTINUOUS,
  52         PROP_DUAL_PAGE,
  53         PROP_FULLSCREEN,
  54         PROP_PRESENTATION,
  55         PROP_SIZING_MODE,
  56         PROP_ZOOM,
  57         PROP_ROTATION,
  58         PROP_HAS_SELECTION,
  59 };
  60
  61 enum {
  62         SIGNAL_BINDING_ACTIVATED,
  63         SIGNAL_ZOOM_INVALID,
  64         SIGNAL_HANDLE_LINK,
  65         SIGNAL_EXTERNAL_LINK,
  66         SIGNAL_POPUP_MENU,
  67         N_SIGNALS,
  68 };
  69
  70 enum {
  71         TARGET_DND_URI,
  72         TARGET_DND_TEXT,
  73         TARGET_DND_IMAGE
  74 };
  75
  76 static guint signals[N_SIGNALS];
  77
  78 typedef enum {
  79         EV_VIEW_FIND_NEXT,
  80         EV_VIEW_FIND_PREV
  81 } EvViewFindDirection;
  82
  83 #define ZOOM_IN_FACTOR  1.2
  84 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  85
  86 #define MIN_SCALE 0.05409
  87 #define MAX_SCALE 4.0
  88
  89 #define SCROLL_TIME 150
  90
  91 /*** Scrolling ***/
  92 static void       scroll_to_current_page                     (EvView *view,
  93                                                               GtkOrientation orientation);
  94 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  95                                                               GtkAdjustment      *hadjustment,
  96                                                               GtkAdjustment      *vadjustment);
  97 static void       view_update_range_and_current_page         (EvView             *view);
  98 static void       set_scroll_adjustment                      (EvView             *view,
  99                                                               GtkOrientation      orientation,
 100                                                               GtkAdjustment      *adjustment);
 101 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 102                                                               guint               keyval,
 103                                                               GdkModifierType modifiers,
 104                                                               GtkScrollType       scroll,
 105                                                               gboolean            horizontal);
 106 static void       ensure_rectangle_is_visible                (EvView             *view,
 107                                                               GdkRectangle       *rect);
 108
 109 /*** Geometry computations ***/
 110 static void       compute_border                             (EvView             *view,
 111                                                               int                 width,
 112                                                               int                 height,
 113                                                               GtkBorder          *border);
 114 static void       get_page_y_offset                          (EvView *view,
 115                                                               int page,
 116                                                               double zoom,
 117                                                               int *y_offset);
 118 static gboolean   get_page_extents                           (EvView             *view,
 119                                                               gint                page,
 120                                                               GdkRectangle       *page_area,
 121                                                               GtkBorder          *border);
 122 static void       view_rect_to_doc_rect                      (EvView             *view,
 123                                                               GdkRectangle       *view_rect,
 124                                                               GdkRectangle       *page_area,
 125                                                               EvRectangle        *doc_rect);
 126 static void       doc_rect_to_view_rect                      (EvView             *view,
 127                                                               int                 page,
 128                                                               EvRectangle        *doc_rect,
 129                                                               GdkRectangle       *view_rect);
 130 static void       find_page_at_location                      (EvView             *view,
 131                                                               gdouble             x,
 132                                                               gdouble             y,
 133                                                               gint               *page,
 134                                                               gint               *x_offset,
 135                                                               gint               *y_offset);
 136 static gboolean  doc_point_to_view_point                     (EvView             *view,
 137                                                               int                 page,
 138                                                               EvPoint            *doc_point,
 139                                                               GdkPoint           *view_point);
 140 /*** Hyperrefs ***/
 141 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 142                                                               gdouble             x,
 143                                                               gdouble             y);
 144 static char*      tip_from_link                              (EvView             *view,
 145                                                               EvLink             *link);
 146 /*** Forms ***/
 147 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 148                                                                gdouble            x,
 149                                                                gdouble            y);
 150
 151 /*** GtkWidget implementation ***/
 152 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 153                                                               GtkRequisition     *requisition);
 154 static void       ev_view_size_request_continuous            (EvView             *view,
 155                                                               GtkRequisition     *requisition);
 156 static void       ev_view_size_request_dual_page             (EvView             *view,
 157                                                               GtkRequisition     *requisition);
 158 static void       ev_view_size_request_single_page           (EvView             *view,
 159                                                               GtkRequisition     *requisition);
 160 static void       ev_view_size_request                       (GtkWidget          *widget,
 161                                                               GtkRequisition     *requisition);
 162 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 163                                                               GtkAllocation      *allocation);
 164 static void       ev_view_realize                            (GtkWidget          *widget);
 165 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 166                                                               GdkEventScroll     *event);
 167 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 168                                                               GdkEventExpose     *event);
 169 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 170 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 171                                                               GdkEventButton     *event);
 172 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 173                                                               GdkEventMotion     *event);
 174 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 175                                                               GdkEventButton     *event);
 176 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 177                                                               GdkEventCrossing   *event);
 178 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 179                                                               GdkEventCrossing   *event);
 180 static void       ev_view_style_set                          (GtkWidget          *widget,
 181                                                               GtkStyle           *old_style);
 182 static void       ev_view_remove_all                         (EvView             *view);
 183
 184 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 185
 186 /*** Drawing ***/
 187 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 188 static void       draw_rubberband                            (GtkWidget          *widget,
 189                                                               GdkWindow          *window,
 190                                                               const GdkRectangle *rect,
 191                                                               guchar              alpha);
 192 static void       highlight_find_results                     (EvView             *view,
 193                                                               int                 page);
 194 static void       draw_one_page                              (EvView             *view,
 195                                                               gint                page,
 196                                                               cairo_t            *cr,
 197                                                               GdkRectangle       *page_area,
 198                                                               GtkBorder          *border,
 199                                                               GdkRectangle       *expose_area,
 200                                                               gboolean           *page_ready);
 201 static void       draw_loading_text                          (EvView             *view,
 202                                                               GdkRectangle       *page_area,
 203                                                               GdkRectangle       *expose_area);
 204 static void       ev_view_reload_page                        (EvView             *view,
 205                                                               gint                page,
 206                                                               GdkRegion          *region);
 207
 208 /*** Callbacks ***/
 209 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 210                                                               GdkRegion          *region,
 211                                                               EvView             *view);
 212 static void       page_changed_cb                            (EvPageCache        *page_cache,
 213                                                               int                 new_page,
 214                                                               EvView             *view);
 215 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 216                                                               EvView             *view);
 217
 218 /*** GObject ***/
 219 static void       ev_view_finalize                           (GObject            *object);
 220 static void       ev_view_destroy                            (GtkObject          *object);
 221 static void       ev_view_set_property                       (GObject            *object,
 222                                                               guint               prop_id,
 223                                                               const GValue       *value,
 224                                                               GParamSpec         *pspec);
 225 static void       ev_view_get_property                       (GObject            *object,
 226                                                               guint               prop_id,
 227                                                               GValue             *value,
 228                                                               GParamSpec         *pspec);
 229 static void       ev_view_class_init                         (EvViewClass        *class);
 230 static void       ev_view_init                               (EvView             *view);
 231
 232 /*** Zoom and sizing ***/
 233 static double   zoom_for_size_fit_width                      (int doc_width,
 234                                                               int doc_height,
 235                                                               int target_width,
 236                                                               int target_height,
 237                                                               int vsb_width);
 238 static double   zoom_for_size_fit_height                     (int doc_width,
 239                                                               int doc_height,
 240                                                               int target_width,
 241                                                               int target_height,
 242                                                               int vsb_height);
 243 static double   zoom_for_size_best_fit                       (int doc_width,
 244                                                               int doc_height,
 245                                                               int target_width,
 246                                                               int target_height,
 247                                                               int vsb_width,
 248                                                               int hsb_width);
 249 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 250                                                               int     width,
 251                                                               int     height);
 252 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 253                                                                 int     width,
 254                                                                 int     height,
 255                                                                 int     vsb_width,
 256                                                                 int     hsb_height);
 257 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 258                                                                 int     width,
 259                                                                 int     height,
 260                                                                 int     vsb_width,
 261                                                                 int     hsb_height);
 262 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 263                                                                 int     width,
 264                                                                 int     height,
 265                                                                 int     vsb_width,
 266                                                                 int     hsb_height);
 267 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 268                                                                 int     width,
 269                                                                 int     height,
 270                                                                 int     vsb_width,
 271                                                                 int     hsb_height);
 272 /*** Cursors ***/
 273 static GdkCursor* ev_view_create_invisible_cursor            (void);
 274 static void       ev_view_set_cursor                         (EvView             *view,
 275                                                               EvViewCursor        new_cursor);
 276 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 277                                                               gint x,
 278                                                               gint y);
 279
 280 /*** Find ***/
 281 static gint         ev_view_find_get_n_results               (EvView             *view,
 282                                                               gint                page);
 283 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 284                                                               gint                page,
 285                                                               gint                result);
 286 static void       jump_to_find_result                        (EvView             *view);
 287 static void       jump_to_find_page                          (EvView             *view,
 288                                                               EvViewFindDirection direction,
 289                                                               gint                shift);
 290
 291 /*** Selection ***/
 292 static void       compute_selections                         (EvView             *view,
 293                                                               EvSelectionStyle    style,
 294                                                               GdkPoint           *start,
 295                                                               GdkPoint           *stop);
 296 static void       clear_selection                            (EvView             *view);
 297 static void       clear_link_selected                        (EvView             *view);
 298 static void       selection_free                             (EvViewSelection    *selection);
 299 static char*      get_selected_text                          (EvView             *ev_view);
 300 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 301                                                               GtkSelectionData   *selection_data,
 302                                                               guint               info,
 303                                                               gpointer            data);
 304 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 305                                                               gpointer            data);
 306 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 307
 308 /*** Presentation ***/
 309 static void       ev_view_presentation_transition_start      (EvView             *ev_view);
 310 static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
 311
 312
 313 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 314
 315 static void
 316 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 317 {
 318         GdkPoint view_point;
 319
 320         if (view->document == NULL) {
 321                 return;
 322         }
 323
 324         doc_point_to_view_point (view, view->current_page, &view->pending_point, &view_point);
 325
 326         if (orientation == GTK_ORIENTATION_VERTICAL) {
 327                 view->pending_point.y = 0;
 328         } else {
 329                 view->pending_point.x = 0;
 330         }
 331
 332         if (orientation == GTK_ORIENTATION_VERTICAL) {
 333                 if (view->continuous) {
 334                         gtk_adjustment_clamp_page (view->vadjustment,
 335                                                    view_point.y - view->spacing / 2,
 336                                                    view_point.y + view->vadjustment->page_size);
 337                 } else {
 338                         gtk_adjustment_set_value (view->vadjustment,
 339                                                   CLAMP (view_point.y,
 340                                                   view->vadjustment->lower,
 341                                                   view->vadjustment->upper -
 342                                                   view->vadjustment->page_size));
 343                 }
 344         } else {
 345                 if (view->dual_page) {
 346                         gtk_adjustment_clamp_page (view->hadjustment,
 347                                                    view_point.x,
 348                                                    view_point.x + view->hadjustment->page_size);
 349                 } else {
 350                         gtk_adjustment_set_value (view->hadjustment,
 351                                                   CLAMP (view_point.x,
 352                                                   view->hadjustment->lower,
 353                                                   view->hadjustment->upper -
 354                                                   view->hadjustment->page_size));
 355                 }
 356         }
 357 }
 358
 359 static void
 360 view_set_adjustment_values (EvView         *view,
 361                             GtkOrientation  orientation)
 362 {
 363         GtkWidget *widget = GTK_WIDGET (view);
 364         GtkAdjustment *adjustment;
 365         int requisition;
 366         int allocation;
 367
 368         double factor;
 369         gint new_value;
 370
 371         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 372                 requisition = widget->requisition.width;
 373                 allocation = widget->allocation.width;
 374                 adjustment = view->hadjustment;
 375         } else {
 376                 requisition = widget->requisition.height;
 377                 allocation = widget->allocation.height;
 378                 adjustment = view->vadjustment;
 379         }
 380
 381         if (!adjustment)
 382                 return;
 383
 384         factor = 1.0;
 385         switch (view->pending_scroll) {
 386                 case SCROLL_TO_KEEP_POSITION:
 387                 case SCROLL_TO_FIND_LOCATION:
 388                         factor = (adjustment->value) / adjustment->upper;
 389                         break;
 390                 case SCROLL_TO_PAGE_POSITION:
 391                         break;
 392                 case SCROLL_TO_CENTER:
 393                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 394                         break;
 395         }
 396
 397         adjustment->page_size = allocation;
 398         adjustment->step_increment = allocation * 0.1;
 399         adjustment->page_increment = allocation * 0.9;
 400         adjustment->lower = 0;
 401         adjustment->upper = MAX (allocation, requisition);
 402
 403         /*
 404          * We add 0.5 to the values before to average out our rounding errors.
 405          */
 406         switch (view->pending_scroll) {
 407                 case SCROLL_TO_KEEP_POSITION:
 408                 case SCROLL_TO_FIND_LOCATION:
 409                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 410                         gtk_adjustment_set_value (adjustment, (int)new_value);
 411                         break;
 412                 case SCROLL_TO_PAGE_POSITION:
 413                         scroll_to_current_page (view, orientation);
 414                         break;
 415                 case SCROLL_TO_CENTER:
 416                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 417                                            0, adjustment->upper - adjustment->page_size);
 418                         gtk_adjustment_set_value (adjustment, (int)new_value);
 419                         break;
 420         }
 421
 422         gtk_adjustment_changed (adjustment);
 423 }
 424
 425 static void
 426 view_update_range_and_current_page (EvView *view)
 427 {
 428         gint current_page;
 429         gint best_current_page = -1;
 430
 431         /* Presentation trumps all other modes */
 432         if (view->presentation) {
 433                 view->start_page = view->current_page;
 434                 view->end_page = view->current_page;
 435         } else if (view->continuous) {
 436                 GdkRectangle current_area, unused, page_area;
 437                 GtkBorder border;
 438                 gboolean found = FALSE;
 439                 gint area_max = -1, area;
 440                 int i;
 441
 442                 if (!(view->vadjustment && view->hadjustment))
 443                         return;
 444
 445                 current_area.x = view->hadjustment->value;
 446                 current_area.width = view->hadjustment->upper;
 447                 current_area.y = view->vadjustment->value;
 448                 current_area.height = view->vadjustment->page_size;
 449
 450                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 451
 452                         get_page_extents (view, i, &page_area, &border);
 453
 454                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 455                                 area = unused.width * unused.height;
 456
 457                                 if (!found) {
 458                                         area_max = area;
 459                                         view->start_page = i;
 460                                         found = TRUE;
 461                                         best_current_page = i;
 462                                 }
 463                                 if (area > area_max) {
 464                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 465                                         area_max = area;
 466                                 }
 467
 468                                 view->end_page = i;
 469                         } else if (found && view->current_page <= view->end_page) {
 470                                 break;
 471                         }
 472                 }
 473
 474         } else if (view->dual_page) {
 475                 if (view->current_page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) {
 476                         view->start_page = view->current_page;
 477                         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 478                                 view->end_page = view->start_page + 1;
 479                         else
 480                                 view->end_page = view->start_page;
 481                 } else {
 482                         if (view->current_page < 1)
 483                                 view->start_page = view->current_page;
 484                         else
 485                                 view->start_page = view->current_page - 1;
 486                         view->end_page = view->current_page;
 487                 }
 488         } else {
 489                 view->start_page = view->current_page;
 490                 view->end_page = view->current_page;
 491         }
 492
 493         best_current_page = MAX (best_current_page, view->start_page);
 494         current_page = ev_page_cache_get_current_page (view->page_cache);
 495
 496         if ((current_page != best_current_page) && (view->pending_scroll == SCROLL_TO_KEEP_POSITION)) {
 497                 view->current_page = best_current_page;
 498                 ev_page_cache_set_current_page (view->page_cache, best_current_page);
 499         }
 500
 501         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 502                                         view->start_page,
 503                                         view->end_page,
 504                                         view->rotation,
 505                                         view->scale,
 506                                         view->selection_info.selections);
 507 }
 508
 509 static void
 510 set_scroll_adjustment (EvView *view,
 511                        GtkOrientation  orientation,
 512                        GtkAdjustment  *adjustment)
 513 {
 514         GtkAdjustment **to_set;
 515
 516         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 517                 to_set = &view->hadjustment;
 518         else
 519                 to_set = &view->vadjustment;
 520
 521         if (*to_set != adjustment) {
 522                 if (*to_set) {
 523                         g_signal_handlers_disconnect_by_func (*to_set,
 524                                                               (gpointer) on_adjustment_value_changed,
 525                                                               view);
 526                         g_object_unref (*to_set);
 527                 }
 528
 529                 *to_set = adjustment;
 530                 view_set_adjustment_values (view, orientation);
 531
 532                 if (*to_set) {
 533                         g_object_ref (*to_set);
 534                         g_signal_connect (*to_set, "value_changed",
 535                                           G_CALLBACK (on_adjustment_value_changed), view);
 536                 }
 537         }
 538 }
 539
 540 static void
 541 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 542                                 GtkAdjustment  *hadjustment,
 543                                 GtkAdjustment  *vadjustment)
 544 {
 545         EvView *view = EV_VIEW (layout);
 546
 547         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 548         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 549
 550         on_adjustment_value_changed (NULL, view);
 551 }
 552
 553 static void
 554 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 555                            guint           keyval,
 556                            GdkModifierType modifiers,
 557                            GtkScrollType   scroll,
 558                            gboolean        horizontal)
 559 {
 560   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 561
 562   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 563                                 "binding_activated", 2,
 564                                 GTK_TYPE_SCROLL_TYPE, scroll,
 565                                 G_TYPE_BOOLEAN, horizontal);
 566   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 567                                 "binding_activated", 2,
 568                                 GTK_TYPE_SCROLL_TYPE, scroll,
 569                                 G_TYPE_BOOLEAN, horizontal);
 570 }
 571
 572 void
 573 ev_view_scroll (EvView        *view,
 574                 GtkScrollType  scroll,
 575                 gboolean       horizontal)
 576 {
 577         GtkAdjustment *adjustment;
 578         double value, increment;
 579         gboolean first_page = FALSE;
 580         gboolean last_page = FALSE;
 581
 582         view->jump_to_find_result = FALSE;
 583
 584         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 585                 switch (scroll) {
 586                         case GTK_SCROLL_PAGE_BACKWARD:
 587                         case GTK_SCROLL_STEP_BACKWARD:
 588                                 ev_view_previous_page (view);
 589                                 break;
 590                         case GTK_SCROLL_PAGE_FORWARD:
 591                         case GTK_SCROLL_STEP_FORWARD:
 592                                 ev_view_next_page (view);
 593                                 break;
 594                         default:
 595                                 break;
 596                 }
 597                 return;
 598         }
 599
 600         /* Assign values for increment and vertical adjustment */
 601         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 602         increment = adjustment->page_size * 0.75;
 603         value = adjustment->value;
 604
 605         /* Assign boolean for first and last page */
 606         if (view->current_page == 0)
 607                 first_page = TRUE;
 608         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 609                 last_page = TRUE;
 610
 611         switch (scroll) {
 612                 case GTK_SCROLL_PAGE_BACKWARD:
 613                         /* Do not jump backwards if at the first page */
 614                         if (value == (adjustment->lower) && first_page) {
 615                                 /* Do nothing */
 616                                 /* At the top of a page, assign the upper bound limit of previous page */
 617                         } else if (value == (adjustment->lower)) {
 618                                 value = adjustment->upper - adjustment->page_size;
 619                                 ev_view_previous_page (view);
 620                                 /* Jump to the top */
 621                         } else {
 622                                 value = MAX (value - increment, adjustment->lower);
 623                         }
 624                         break;
 625                 case GTK_SCROLL_PAGE_FORWARD:
 626                         /* Do not jump forward if at the last page */
 627                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 628                                 /* Do nothing */
 629                         /* At the bottom of a page, assign the lower bound limit of next page */
 630                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 631                                 value = 0;
 632                                 ev_view_next_page (view);
 633                         /* Jump to the bottom */
 634                         } else {
 635                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 636                         }
 637                         break;
 638                 case GTK_SCROLL_STEP_BACKWARD:
 639                         value -= adjustment->step_increment;
 640                         break;
 641                 case GTK_SCROLL_STEP_FORWARD:
 642                         value += adjustment->step_increment;
 643                         break;
 644                 case GTK_SCROLL_STEP_DOWN:
 645                         value -= adjustment->step_increment / 10;
 646                         break;
 647                 case GTK_SCROLL_STEP_UP:
 648                         value += adjustment->step_increment / 10;
 649                         break;
 650                 default:
 651                         break;
 652         }
 653
 654         value = CLAMP (value, adjustment->lower,
 655                        adjustment->upper - adjustment->page_size);
 656
 657         gtk_adjustment_set_value (adjustment, value);
 658 }
 659
 660 #define MARGIN 5
 661
 662 static void
 663 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 664 {
 665         GtkWidget *widget = GTK_WIDGET (view);
 666         GtkAdjustment *adjustment;
 667         int value;
 668
 669         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 670
 671         adjustment = view->vadjustment;
 672
 673         if (rect->y < adjustment->value) {
 674                 value = MAX (adjustment->lower, rect->y - MARGIN);
 675                 gtk_adjustment_set_value (view->vadjustment, value);
 676         } else if (rect->y + rect->height >
 677                    adjustment->value + widget->allocation.height) {
 678                 value = MIN (adjustment->upper, rect->y + rect->height -
 679                              widget->allocation.height + MARGIN);
 680                 gtk_adjustment_set_value (view->vadjustment, value);
 681         }
 682
 683         adjustment = view->hadjustment;
 684
 685         if (rect->x < adjustment->value) {
 686                 value = MAX (adjustment->lower, rect->x - MARGIN);
 687                 gtk_adjustment_set_value (view->hadjustment, value);
 688         } else if (rect->x + rect->height >
 689                    adjustment->value + widget->allocation.width) {
 690                 value = MIN (adjustment->upper, rect->x + rect->width -
 691                              widget->allocation.width + MARGIN);
 692                 gtk_adjustment_set_value (view->hadjustment, value);
 693         }
 694
 695         gtk_widget_queue_resize (GTK_WIDGET (view));
 696 }
 697
 698 /*** Geometry computations ***/
 699
 700 static void
 701 compute_border (EvView *view, int width, int height, GtkBorder *border)
 702 {
 703         if (view->presentation) {
 704                 border->left = 0;
 705                 border->right = 0;
 706                 border->top = 0;
 707                 border->bottom = 0;
 708         } else {
 709                 ev_document_misc_get_page_border_size (width, height, border);
 710         }
 711 }
 712
 713 static void
 714 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 715 {
 716         int max_width, offset;
 717         GtkBorder border;
 718
 719         g_return_if_fail (y_offset != NULL);
 720
 721         ev_page_cache_get_max_width (view->page_cache, view->rotation, zoom, &max_width);
 722
 723         compute_border (view, max_width, max_width, &border);
 724
 725         if (view->dual_page) {
 726                 ev_page_cache_get_height_to_page (view->page_cache, page,
 727                                                   view->rotation, zoom, NULL, &offset);
 728                 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);
 729         } else {
 730                 ev_page_cache_get_height_to_page (view->page_cache, page,
 731                                                   view->rotation, zoom, &offset, NULL);
 732                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 733         }
 734
 735         *y_offset = offset;
 736         return;
 737 }
 738
 739 static gboolean
 740 get_page_extents (EvView       *view,
 741                   gint          page,
 742                   GdkRectangle *page_area,
 743                   GtkBorder    *border)
 744 {
 745         GtkWidget *widget;
 746         int width, height;
 747
 748         widget = GTK_WIDGET (view);
 749
 750         /* Get the size of the page */
 751         ev_page_cache_get_size (view->page_cache, page,
 752                                 view->rotation,
 753                                 view->scale,
 754                                 &width, &height);
 755         compute_border (view, width, height, border);
 756         page_area->width = width + border->left + border->right;
 757         page_area->height = height + border->top + border->bottom;
 758
 759         if (view->presentation) {
 760                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 761                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 762         } else if (view->continuous) {
 763                 gint max_width;
 764                 gint x, y;
 765
 766                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 767                                              view->scale, &max_width);
 768                 max_width = max_width + border->left + border->right;
 769                 /* Get the location of the bounding box */
 770                 if (view->dual_page) {
 771                         x = view->spacing + ((page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? 0 : 1) * (max_width + view->spacing);
 772                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 773                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 774                                 x = x + (max_width - width - border->left - border->right);
 775                 } else {
 776                         x = view->spacing;
 777                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 778                 }
 779
 780                 get_page_y_offset (view, page, view->scale, &y);
 781
 782                 page_area->x = x;
 783                 page_area->y = y;
 784         } else {
 785                 gint x, y;
 786                 if (view->dual_page) {
 787                         gint width_2, height_2;
 788                         gint max_width = width;
 789                         gint max_height = height;
 790                         GtkBorder overall_border;
 791                         gint other_page;
 792
 793                         other_page = (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache)) ? page + 1: page - 1;
 794
 795                         /* First, we get the bounding box of the two pages */
 796                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)
 797                             && (0 <= other_page)) {
 798                                 ev_page_cache_get_size (view->page_cache,
 799                                                         other_page,
 800                                                         view->rotation,
 801                                                         view->scale,
 802                                                         &width_2, &height_2);
 803                                 if (width_2 > width)
 804                                         max_width = width_2;
 805                                 if (height_2 > height)
 806                                         max_height = height_2;
 807                         }
 808                         compute_border (view, max_width, max_height, &overall_border);
 809
 810                         /* Find the offsets */
 811                         x = view->spacing;
 812                         y = view->spacing;
 813
 814                         /* Adjust for being the left or right page */
 815                         if (page % 2 == ev_page_cache_get_dual_even_left (view->page_cache))
 816                                 x = x + max_width - width;
 817                         else
 818                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 819
 820                         y = y + (max_height - height)/2;
 821
 822                         /* Adjust for extra allocation */
 823                         x = x + MAX (0, widget->allocation.width -
 824                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 825                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 826                 } else {
 827                         x = view->spacing;
 828                         y = view->spacing;
 829
 830                         /* Adjust for extra allocation */
 831                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 832                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 833                 }
 834
 835                 page_area->x = x;
 836                 page_area->y = y;
 837         }
 838
 839         return TRUE;
 840 }
 841
 842 static void
 843 view_point_to_doc_point (EvView *view,
 844                          GdkPoint *view_point,
 845                          GdkRectangle *page_area,
 846                          double  *doc_point_x,
 847                          double  *doc_point_y)
 848 {
 849         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 850         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 851 }
 852
 853 static void
 854 view_rect_to_doc_rect (EvView *view,
 855                        GdkRectangle *view_rect,
 856                        GdkRectangle *page_area,
 857                        EvRectangle  *doc_rect)
 858 {
 859         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 860         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 861         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 862         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 863 }
 864
 865 static gboolean
 866 doc_point_to_view_point (EvView       *view,
 867                          int           page,
 868                          EvPoint      *doc_point,
 869                          GdkPoint     *view_point)
 870 {
 871         GdkRectangle page_area;
 872         GtkBorder border;
 873         double x, y, view_x, view_y;
 874         int width, height;
 875
 876         ev_page_cache_get_size (view->page_cache, page,
 877                                 view->rotation,
 878                                 1.0,
 879                                 &width, &height);
 880
 881         if (view->rotation == 0) {
 882                 x = doc_point->x;
 883                 y = doc_point->y;
 884         } else if (view->rotation == 90) {
 885                 x = width - doc_point->y;
 886                 y = doc_point->x;
 887         } else if (view->rotation == 180) {
 888                 x = width - doc_point->x;
 889                 y = height - doc_point->y;
 890         } else if (view->rotation == 270) {
 891                 x = doc_point->y;
 892                 y = height - doc_point->x;
 893         } else {
 894                 g_assert_not_reached ();
 895         }
 896
 897         get_page_extents (view, page, &page_area, &border);
 898
 899         view_x = x * view->scale;
 900         view_y = y * view->scale;
 901         view_point->x = view_x + page_area.x;
 902         view_point->y = view_y + page_area.y;
 903
 904         return (view_x > 0 && view_x <= page_area.width &&
 905                 view_y > 0 && view_y <= page_area.height);
 906 }
 907
 908 static void
 909 doc_rect_to_view_rect (EvView       *view,
 910                        int           page,
 911                        EvRectangle  *doc_rect,
 912                        GdkRectangle *view_rect)
 913 {
 914         GdkRectangle page_area;
 915         GtkBorder border;
 916         double x, y, w, h;
 917         int width, height;
 918
 919         ev_page_cache_get_size (view->page_cache, page,
 920                                 view->rotation,
 921                                 1.0,
 922                                 &width, &height);
 923
 924         if (view->rotation == 0) {
 925                 x = doc_rect->x1;
 926                 y = doc_rect->y1;
 927                 w = doc_rect->x2 - doc_rect->x1;
 928                 h = doc_rect->y2 - doc_rect->y1;
 929         } else if (view->rotation == 90) {
 930                 x = width - doc_rect->y2;
 931                 y = doc_rect->x1;
 932                 w = doc_rect->y2 - doc_rect->y1;
 933                 h = doc_rect->x2 - doc_rect->x1;
 934         } else if (view->rotation == 180) {
 935                 x = width - doc_rect->x2;
 936                 y = height - doc_rect->y2;
 937                 w = doc_rect->x2 - doc_rect->x1;
 938                 h = doc_rect->y2 - doc_rect->y1;
 939         } else if (view->rotation == 270) {
 940                 x = doc_rect->y1;
 941                 y = height - doc_rect->x2;
 942                 w = doc_rect->y2 - doc_rect->y1;
 943                 h = doc_rect->x2 - doc_rect->x1;
 944         } else {
 945                 g_assert_not_reached ();
 946         }
 947
 948         get_page_extents (view, page, &page_area, &border);
 949
 950         view_rect->x = x * view->scale + page_area.x;
 951         view_rect->y = y * view->scale + page_area.y;
 952         view_rect->width = w * view->scale;
 953         view_rect->height = h * view->scale;
 954 }
 955
 956 static void
 957 find_page_at_location (EvView  *view,
 958                        gdouble  x,
 959                        gdouble  y,
 960                        gint    *page,
 961                        gint    *x_offset,
 962                        gint    *y_offset)
 963 {
 964         int i;
 965
 966         if (view->document == NULL)
 967                 return;
 968
 969         g_assert (page);
 970         g_assert (x_offset);
 971         g_assert (y_offset);
 972
 973         for (i = view->start_page; i <= view->end_page; i++) {
 974                 GdkRectangle page_area;
 975                 GtkBorder border;
 976
 977                 if (! get_page_extents (view, i, &page_area, &border))
 978                         continue;
 979
 980                 if ((x >= page_area.x + border.left) &&
 981                     (x < page_area.x + page_area.width - border.right) &&
 982                     (y >= page_area.y + border.top) &&
 983                     (y < page_area.y + page_area.height - border.bottom)) {
 984                         *page = i;
 985                         *x_offset = x - (page_area.x + border.left);
 986                         *y_offset = y - (page_area.y + border.top);
 987                         return;
 988                 }
 989         }
 990
 991         *page = -1;
 992 }
 993
 994 static gboolean
 995 location_in_text (EvView  *view,
 996                   gdouble  x,
 997                   gdouble  y)
 998 {
 999         GdkRegion *region;
1000         gint page = -1;
1001         gint x_offset = 0, y_offset = 0;
1002
1003         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1004
1005         if (page == -1)
1006                 return FALSE;
1007
1008         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1009
1010         if (region)
1011                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1012         else
1013                 return FALSE;
1014 }
1015
1016 static int
1017 ev_view_get_width (EvView *view)
1018 {
1019         return GTK_WIDGET (view)->allocation.width;
1020 }
1021
1022 static int
1023 ev_view_get_height (EvView *view)
1024 {
1025         return GTK_WIDGET (view)->allocation.height;
1026 }
1027
1028 static gboolean
1029 location_in_selected_text (EvView  *view,
1030                            gdouble  x,
1031                            gdouble  y)
1032 {
1033         gint page = -1;
1034         gint x_offset = 0, y_offset = 0;
1035         EvViewSelection *selection;
1036         GList *l = NULL;
1037
1038         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1039                 selection = (EvViewSelection *)l->data;
1040
1041                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1042
1043                 if (page != selection->page)
1044                         continue;
1045
1046                 if (selection->covered_region &&
1047                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1048                         return TRUE;
1049         }
1050
1051         return FALSE;
1052 }
1053
1054 static gboolean
1055 get_doc_point_from_offset (EvView *view,
1056                            gint    page,
1057                            gint    x_offset,
1058                            gint    y_offset,
1059                            gint   *x_new,
1060                            gint   *y_new)
1061 {
1062         int width, height;
1063         double x, y;
1064
1065         ev_page_cache_get_size (view->page_cache, page,
1066                                 view->rotation,
1067                                 1.0,
1068                                 &width, &height);
1069
1070         x_offset = x_offset / view->scale;
1071         y_offset = y_offset / view->scale;
1072
1073         if (view->rotation == 0) {
1074                 x = x_offset;
1075                 y = y_offset;
1076         } else if (view->rotation == 90) {
1077                 x = y_offset;
1078                 y = width - x_offset;
1079         } else if (view->rotation == 180) {
1080                 x = width - x_offset;
1081                 y = height - y_offset;
1082         } else if (view->rotation == 270) {
1083                 x = height - y_offset;
1084                 y = x_offset;
1085         } else {
1086                 g_assert_not_reached ();
1087         }
1088
1089         *x_new = x;
1090         *y_new = y;
1091
1092         return TRUE;
1093 }
1094
1095 /*** Hyperref ***/
1096 static EvLink *
1097 ev_view_get_link_at_location (EvView  *view,
1098                               gdouble  x,
1099                               gdouble  y)
1100 {
1101         gint page = -1;
1102         gint x_offset = 0, y_offset = 0;
1103         gint x_new = 0, y_new = 0;
1104         GList *link_mapping;
1105
1106         if (!EV_IS_DOCUMENT_LINKS (view->document))
1107                 return NULL;
1108
1109         x += view->scroll_x;
1110         y += view->scroll_y;
1111
1112         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1113
1114         if (page == -1)
1115                 return NULL;
1116
1117
1118         if (get_doc_point_from_offset (view, page, x_offset,
1119                                        y_offset, &x_new, &y_new) == FALSE)
1120                 return NULL;
1121
1122         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1123
1124         if (link_mapping)
1125                 return ev_link_mapping_find (link_mapping, x_new, y_new);
1126         else
1127                 return NULL;
1128 }
1129
1130 static void
1131 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1132 {
1133         EvPoint doc_point;
1134         gdouble zoom, left, top;
1135         gboolean change_left, change_top;
1136
1137         left = ev_link_dest_get_left (dest, &change_left);
1138         top = ev_link_dest_get_top (dest, &change_top);
1139
1140         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1141                                        ev_link_dest_get_bottom (dest) - top,
1142                                        ev_view_get_width (view),
1143                                        ev_view_get_height (view), 0, 0);
1144
1145         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1146         ev_view_set_zoom (view, zoom, FALSE);
1147
1148         doc_point.x = change_left ? left : 0;
1149         doc_point.y = change_top ? top : 0;
1150
1151         view->current_page = ev_link_dest_get_page (dest);
1152         if (change_left || change_top)
1153                 view->pending_point = doc_point;
1154         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1155
1156         gtk_widget_queue_resize (GTK_WIDGET (view));
1157 }
1158
1159 static void
1160 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1161 {
1162         EvPoint doc_point;
1163         int doc_width, doc_height, page;
1164         double zoom, left;
1165         gboolean change_left;
1166
1167         page = ev_link_dest_get_page (dest);
1168         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1169
1170         left = ev_link_dest_get_left (dest, &change_left);
1171         doc_point.x = change_left ? left : 0;
1172         doc_point.y = 0;
1173
1174         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1175                                          ev_view_get_width (view),
1176                                          ev_view_get_height (view), 0);
1177
1178         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1179         ev_view_set_zoom (view, zoom, FALSE);
1180
1181         view->current_page = page;
1182         if (change_left)
1183                 view->pending_point = doc_point;
1184         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1185
1186         gtk_widget_queue_resize (GTK_WIDGET (view));
1187 }
1188
1189 static void
1190 goto_fith_dest (EvView *view, EvLinkDest *dest)
1191 {
1192         EvPoint doc_point;
1193         int doc_width, doc_height, page;
1194         gdouble zoom, top;
1195         gboolean change_top;
1196
1197         page = ev_link_dest_get_page (dest);
1198         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1199
1200         top = ev_link_dest_get_top (dest, &change_top);
1201
1202         doc_point.x = 0;
1203         doc_point.y = change_top ? top : 0;
1204
1205         zoom = zoom_for_size_fit_width (doc_width, top,
1206                                         ev_view_get_width (view),
1207                                         ev_view_get_height (view), 0);
1208
1209         ev_view_set_sizing_mode (view, EV_SIZING_FIT_WIDTH);
1210         ev_view_set_zoom (view, zoom, FALSE);
1211
1212         view->current_page = page;
1213         if (change_top)
1214                 view->pending_point = doc_point;
1215         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1216
1217         gtk_widget_queue_resize (GTK_WIDGET (view));
1218 }
1219
1220 static void
1221 goto_fit_dest (EvView *view, EvLinkDest *dest)
1222 {
1223         double zoom;
1224         int doc_width, doc_height;
1225         int page;
1226
1227         page = ev_link_dest_get_page (dest);
1228         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1229
1230         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1231                                        ev_view_get_height (view), 0, 0);
1232
1233         ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
1234         ev_view_set_zoom (view, zoom, FALSE);
1235
1236         view->current_page = page;
1237         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1238
1239         gtk_widget_queue_resize (GTK_WIDGET (view));
1240 }
1241
1242 static void
1243 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1244 {
1245         EvPoint doc_point;
1246         gint page;
1247         gdouble zoom, left, top;
1248         gboolean change_zoom, change_left, change_top;
1249
1250         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1251         page = ev_link_dest_get_page (dest);
1252
1253         if (change_zoom && zoom > 1) {
1254                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1255                 ev_view_set_zoom (view, zoom, FALSE);
1256         }
1257
1258         left = ev_link_dest_get_left (dest, &change_left);
1259         top = ev_link_dest_get_top (dest, &change_top);
1260
1261         doc_point.x = change_left ? left : 0;
1262         doc_point.y = change_top ? top : 0;
1263
1264         view->current_page = page;
1265         if (change_left || change_top)
1266                 view->pending_point = doc_point;
1267         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1268
1269         gtk_widget_queue_resize (GTK_WIDGET (view));
1270 }
1271
1272 static void
1273 goto_dest (EvView *view, EvLinkDest *dest)
1274 {
1275         EvLinkDestType type;
1276         int page, n_pages, current_page;
1277
1278         page = ev_link_dest_get_page (dest);
1279         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1280
1281         if (page < 0 || page >= n_pages)
1282                 return;
1283
1284         current_page = view->current_page;
1285
1286         type = ev_link_dest_get_dest_type (dest);
1287
1288         switch (type) {
1289                 case EV_LINK_DEST_TYPE_PAGE:
1290                         ev_page_cache_set_current_page (view->page_cache, page);
1291                         break;
1292                 case EV_LINK_DEST_TYPE_FIT:
1293                         goto_fit_dest (view, dest);
1294                         break;
1295                 case EV_LINK_DEST_TYPE_FITH:
1296                         goto_fith_dest (view, dest);
1297                         break;
1298                 case EV_LINK_DEST_TYPE_FITV:
1299                         goto_fitv_dest (view, dest);
1300                         break;
1301                 case EV_LINK_DEST_TYPE_FITR:
1302                         goto_fitr_dest (view, dest);
1303                         break;
1304                 case EV_LINK_DEST_TYPE_XYZ:
1305                         goto_xyz_dest (view, dest);
1306                         break;
1307                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1308                         ev_page_cache_set_page_label (view->page_cache, ev_link_dest_get_page_label (dest));
1309                         break;
1310                 default:
1311                         g_assert_not_reached ();
1312         }
1313
1314         if (current_page != view->current_page)
1315                 ev_page_cache_set_current_page (view->page_cache,
1316                                                 view->current_page);
1317 }
1318
1319 static void
1320 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1321 {
1322         EvLinkDestType type;
1323
1324         type = ev_link_dest_get_dest_type (dest);
1325
1326         if (type == EV_LINK_DEST_TYPE_NAMED) {
1327                 EvLinkDest  *dest2;
1328                 const gchar *named_dest;
1329
1330                 named_dest = ev_link_dest_get_named_dest (dest);
1331                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1332                                                           named_dest);
1333                 if (dest2) {
1334                         goto_dest (view, dest2);
1335                         g_object_unref (dest2);
1336                 }
1337
1338                 return;
1339         }
1340
1341         goto_dest (view, dest);
1342 }
1343
1344 void
1345 ev_view_handle_link (EvView *view, EvLink *link)
1346 {
1347         EvLinkAction    *action = NULL;
1348         EvLinkActionType type;
1349
1350         action = ev_link_get_action (link);
1351         if (!action)
1352                 return;
1353
1354         type = ev_link_action_get_action_type (action);
1355
1356         switch (type) {
1357                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1358                         EvLinkDest *dest;
1359
1360                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1361
1362                         dest = ev_link_action_get_dest (action);
1363                         ev_view_goto_dest (view, dest);
1364                 }
1365                         break;
1366                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1367                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1368                 case EV_LINK_ACTION_TYPE_LAUNCH:
1369                 case EV_LINK_ACTION_TYPE_NAMED:
1370                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1371                         break;
1372         }
1373 }
1374
1375 gchar *
1376 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1377 {
1378         EvLinkDestType type;
1379         gchar *msg = NULL;
1380
1381         type = ev_link_dest_get_dest_type (dest);
1382
1383         switch (type) {
1384                 case EV_LINK_DEST_TYPE_NAMED: {
1385                         EvLinkDest  *dest2;
1386                         const gchar *named_dest;
1387
1388                         named_dest = ev_link_dest_get_named_dest (dest);
1389                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1390                                                                   named_dest);
1391                         if (dest2) {
1392                                 msg = ev_page_cache_get_page_label (view->page_cache,
1393                                                                     ev_link_dest_get_page (dest2));
1394                                 g_object_unref (dest2);
1395                         }
1396                 }
1397
1398                         break;
1399                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1400                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1401                 }
1402                         break;
1403                 default:
1404                         msg = ev_page_cache_get_page_label (view->page_cache,
1405                                                             ev_link_dest_get_page (dest));
1406         }
1407
1408         return msg;
1409 }
1410
1411 static char *
1412 tip_from_action_named (EvLinkAction *action)
1413 {
1414         const gchar *name = ev_link_action_get_name (action);
1415
1416         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1417                 return g_strdup (_("Go to first page"));
1418         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1419                 return g_strdup (_("Go to previous page"));
1420         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1421                 return g_strdup (_("Go to next page"));
1422         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1423                 return g_strdup (_("Go to last page"));
1424         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1425                 return g_strdup (_("Go to page"));
1426         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1427                 return g_strdup (_("Find"));
1428         }
1429
1430         return NULL;
1431 }
1432
1433 static char *
1434 tip_from_link (EvView *view, EvLink *link)
1435 {
1436         EvLinkAction *action;
1437         EvLinkActionType type;
1438         char *msg = NULL;
1439         char *page_label;
1440         const char *title;
1441
1442         action = ev_link_get_action (link);
1443         title = ev_link_get_title (link);
1444
1445         if (!action)
1446                 return title ? g_strdup (title) : NULL;
1447
1448         type = ev_link_action_get_action_type (action);
1449
1450         switch (type) {
1451                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1452                         page_label = ev_view_page_label_from_dest (view,
1453                                                                    ev_link_action_get_dest (action));
1454                         if (page_label) {
1455                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1456                                 g_free (page_label);
1457                         }
1458                         break;
1459                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1460                         if (title) {
1461                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1462                                                        ev_link_action_get_filename (action));
1463                         } else {
1464                                 msg = g_strdup_printf (_("Go to file “%s”"),
1465                                                        ev_link_action_get_filename (action));
1466                         }
1467                         break;
1468                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1469                         msg = g_strdup (ev_link_action_get_uri (action));
1470                         break;
1471                 case EV_LINK_ACTION_TYPE_LAUNCH:
1472                         msg = g_strdup_printf (_("Launch %s"),
1473                                                ev_link_action_get_filename (action));
1474                         break;
1475                 case EV_LINK_ACTION_TYPE_NAMED:
1476                         msg = tip_from_action_named (action);
1477                         break;
1478                 default:
1479                         if (title)
1480                                 msg = g_strdup (title);
1481                         break;
1482         }
1483
1484         return msg;
1485 }
1486
1487 static void
1488 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1489 {
1490         EvLink      *link;
1491         EvFormField *field;
1492
1493         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1494                 return;
1495
1496         if (view->drag_info.in_drag) {
1497                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1498                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1499                 return;
1500         }
1501
1502         if (view->scroll_info.autoscrolling) {
1503                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1504                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1505                 return;
1506         }
1507
1508         link = ev_view_get_link_at_location (view, x, y);
1509         if (link) {
1510                 g_object_set (view, "has-tooltip", TRUE, NULL);
1511                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1512         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1513                 if (field->is_read_only) {
1514                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1515                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1516                             view->cursor == EV_VIEW_CURSOR_DRAG)
1517                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1518                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1519                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1520                 } else {
1521                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1522                 }
1523         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1524                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1525         } else {
1526                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1527                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1528                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1529                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1530                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1531         }
1532 }
1533
1534 /*** Images ***/
1535 static EvImage *
1536 ev_view_get_image_at_location (EvView  *view,
1537                                gdouble  x,
1538                                gdouble  y)
1539 {
1540         gint page = -1;
1541         gint x_offset = 0, y_offset = 0;
1542         gint x_new = 0, y_new = 0;
1543         GList *image_mapping;
1544
1545         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1546                 return NULL;
1547
1548         x += view->scroll_x;
1549         y += view->scroll_y;
1550
1551         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1552
1553         if (page == -1)
1554                 return NULL;
1555
1556         if (get_doc_point_from_offset (view, page, x_offset,
1557                                        y_offset, &x_new, &y_new) == FALSE)
1558                 return NULL;
1559
1560         image_mapping = ev_pixbuf_cache_get_image_mapping (view->pixbuf_cache, page);
1561
1562         if (image_mapping)
1563                 return ev_image_mapping_find (image_mapping, x_new, y_new);
1564         else
1565                 return NULL;
1566 }
1567
1568 /*** Forms ***/
1569 static EvFormField *
1570 ev_view_get_form_field_at_location (EvView  *view,
1571                                     gdouble  x,
1572                                     gdouble  y)
1573 {
1574         gint page = -1;
1575         gint x_offset = 0, y_offset = 0;
1576         gint x_new = 0, y_new = 0;
1577         GList *forms_mapping;
1578
1579         if (!EV_IS_DOCUMENT_FORMS (view->document))
1580                 return NULL;
1581
1582         x += view->scroll_x;
1583         y += view->scroll_y;
1584
1585         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1586
1587         if (page == -1)
1588                 return NULL;
1589
1590         if (get_doc_point_from_offset (view, page, x_offset,
1591                                        y_offset, &x_new, &y_new) == FALSE)
1592                 return NULL;
1593
1594         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, page);
1595
1596         if (forms_mapping)
1597                 return ev_form_field_mapping_find (forms_mapping, x_new, y_new);
1598         else
1599                 return NULL;
1600 }
1601
1602 static GdkRegion *
1603 ev_view_form_field_get_region (EvView      *view,
1604                                EvFormField *field)
1605 {
1606         EvRectangle  field_area;
1607         GdkRectangle view_area;
1608         GList       *forms_mapping;
1609
1610         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1611                                                                 field->page->index);
1612         ev_form_field_mapping_get_area (forms_mapping, field, &field_area);
1613         doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
1614         view_area.x -= view->scroll_x;
1615         view_area.y -= view->scroll_y;
1616
1617         return gdk_region_rectangle (&view_area);
1618 }
1619
1620 static gboolean
1621 ev_view_forms_remove_widgets (EvView *view)
1622 {
1623         ev_view_remove_all (view);
1624
1625         return FALSE;
1626 }
1627
1628 static void
1629 ev_view_form_field_destroy (GtkWidget *widget,
1630                             EvView    *view)
1631 {
1632         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1633 }
1634
1635 static GtkWidget *
1636 ev_view_form_field_button_create_widget (EvView      *view,
1637                                          EvFormField *field)
1638 {
1639         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1640         GdkRegion         *field_region = NULL;
1641
1642         switch (field_button->type) {
1643                 case EV_FORM_FIELD_BUTTON_PUSH:
1644                         return NULL;
1645                 case EV_FORM_FIELD_BUTTON_CHECK:
1646                 case EV_FORM_FIELD_BUTTON_RADIO: {
1647                         gboolean  state;
1648                         GList    *forms_mapping, *l;
1649
1650                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1651                                                                                field);
1652
1653                         /* FIXME: it actually depends on NoToggleToOff flags */
1654                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1655                             state && field_button->state)
1656                                 return NULL;
1657
1658                         field_region = ev_view_form_field_get_region (view, field);
1659
1660                         /* For radio buttons and checkbox buttons that are in a set
1661                          * we need to update also the region for the current selected item
1662                          */
1663                         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1664                                                                                 field->page->index);
1665                         for (l = forms_mapping; l; l = g_list_next (l)) {
1666                                 EvFormField *button = ((EvFormFieldMapping *)(l->data))->field;
1667                                 GdkRegion   *button_region;
1668
1669                                 if (button->id == field->id)
1670                                         continue;
1671
1672                                 /* FIXME: only buttons in the same group should be updated */
1673                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1674                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1675                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1676                                         continue;
1677
1678                                 button_region = ev_view_form_field_get_region (view, button);
1679                                 gdk_region_union (field_region, button_region);
1680                                 gdk_region_destroy (button_region);
1681                         }
1682
1683                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
1684                                                                        field, !state);
1685                         field_button->state = !state;
1686                 }
1687                         break;
1688         }
1689
1690         ev_view_reload_page (view, field->page->index, field_region);
1691         gdk_region_destroy (field_region);
1692
1693         return NULL;
1694 }
1695
1696 static void
1697 ev_view_form_field_text_save (EvView    *view,
1698                               GtkWidget *widget)
1699 {
1700         EvFormField *field;
1701
1702         if (!view->document)
1703                 return;
1704
1705         field = g_object_get_data (G_OBJECT (widget), "form-field");
1706
1707         if (field->changed) {
1708                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1709                 GdkRegion       *field_region;
1710
1711                 field_region = ev_view_form_field_get_region (view, field);
1712
1713                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
1714                                                             field, field_text->text);
1715                 field->changed = FALSE;
1716                 ev_view_reload_page (view, field->page->index, field_region);
1717                 gdk_region_destroy (field_region);
1718         }
1719 }
1720
1721 static void
1722 ev_view_form_field_text_changed (GtkWidget   *widget,
1723                                  EvFormField *field)
1724 {
1725         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1726         gchar           *text = NULL;
1727
1728         if (GTK_IS_ENTRY (widget)) {
1729                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
1730         } else if (GTK_IS_TEXT_BUFFER (widget)) {
1731                 GtkTextIter start, end;
1732
1733                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
1734                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
1735                                                  &start, &end, FALSE);
1736         }
1737
1738         if (!field_text->text ||
1739             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
1740                 g_free (field_text->text);
1741                 field_text->text = text;
1742                 field->changed = TRUE;
1743         }
1744 }
1745
1746 static GtkWidget *
1747 ev_view_form_field_text_create_widget (EvView      *view,
1748                                        EvFormField *field)
1749 {
1750         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1751         GtkWidget       *text = NULL;
1752         gchar           *txt;
1753
1754         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
1755                                                           field);
1756
1757         switch (field_text->type) {
1758                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
1759                         /* TODO */
1760                 case EV_FORM_FIELD_TEXT_NORMAL:
1761                         text = gtk_entry_new ();
1762                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
1763                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
1764                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
1765
1766                         if (txt) {
1767                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
1768                                 g_free (txt);
1769                         }
1770
1771                         g_signal_connect (text, "changed",
1772                                           G_CALLBACK (ev_view_form_field_text_changed),
1773                                           field);
1774                         g_signal_connect_after (text, "activate",
1775                                                 G_CALLBACK (ev_view_form_field_destroy),
1776                                                 view);
1777                         break;
1778                 case EV_FORM_FIELD_TEXT_MULTILINE: {
1779                         GtkTextBuffer *buffer;
1780
1781                         text = gtk_text_view_new ();
1782                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
1783
1784                         if (txt) {
1785                                 gtk_text_buffer_set_text (buffer, txt, -1);
1786                                 g_free (txt);
1787                         }
1788
1789                         g_signal_connect (buffer, "changed",
1790                                           G_CALLBACK (ev_view_form_field_text_changed),
1791                                           field);
1792                 }
1793                         break;
1794         }
1795
1796         g_object_weak_ref (G_OBJECT (text),
1797                            (GWeakNotify)ev_view_form_field_text_save,
1798                            view);
1799
1800         return text;
1801 }
1802
1803 static void
1804 ev_view_form_field_choice_save (EvView    *view,
1805                                 GtkWidget *widget)
1806 {
1807         EvFormField *field;
1808
1809         if (!view->document)
1810                 return;
1811
1812         field = g_object_get_data (G_OBJECT (widget), "form-field");
1813
1814         if (field->changed) {
1815                 GList             *l;
1816                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1817                 GdkRegion         *field_region;
1818
1819                 field_region = ev_view_form_field_get_region (view, field);
1820
1821                 if (field_choice->is_editable) {
1822                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
1823                                                                       field, field_choice->text);
1824                 } else {
1825                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
1826                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
1827                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
1828                                                                                  field,
1829                                                                                  GPOINTER_TO_INT (l->data));
1830                         }
1831                 }
1832                 field->changed = FALSE;
1833                 ev_view_reload_page (view, field->page->index, field_region);
1834                 gdk_region_destroy (field_region);
1835         }
1836 }
1837
1838 static void
1839 ev_view_form_field_choice_changed (GtkWidget   *widget,
1840                                    EvFormField *field)
1841 {
1842         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1843
1844         if (GTK_IS_COMBO_BOX (widget)) {
1845                 gint item;
1846
1847                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
1848                 if (!field_choice->selected_items ||
1849                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
1850                         g_list_free (field_choice->selected_items);
1851                         field_choice->selected_items = NULL;
1852                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1853                                                                        GINT_TO_POINTER (item));
1854                         field->changed = TRUE;
1855                 }
1856
1857                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
1858                         gchar *text;
1859
1860                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
1861                         if (!field_choice->text ||
1862                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
1863                                 g_free (field_choice->text);
1864                                 field_choice->text = text;
1865                                 field->changed = TRUE;
1866                         }
1867                 }
1868         } else if (GTK_IS_TREE_SELECTION (widget)) {
1869                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
1870                 GtkTreeModel     *model;
1871                 GList            *items, *l;
1872
1873                 items = gtk_tree_selection_get_selected_rows (selection, &model);
1874                 g_list_free (field_choice->selected_items);
1875                 field_choice->selected_items = NULL;
1876
1877                 for (l = items; l && l->data; l = g_list_next (l)) {
1878                         GtkTreeIter  iter;
1879                         GtkTreePath *path = (GtkTreePath *)l->data;
1880                         gint         item;
1881
1882                         gtk_tree_model_get_iter (model, &iter, path);
1883                         gtk_tree_model_get (model, &iter, 1, &item, -1);
1884
1885                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1886                                                                        GINT_TO_POINTER (item));
1887
1888                         gtk_tree_path_free (path);
1889                 }
1890
1891                 g_list_free (items);
1892
1893                 field->changed = TRUE;
1894         }
1895 }
1896
1897 static GtkWidget *
1898 ev_view_form_field_choice_create_widget (EvView      *view,
1899                                          EvFormField *field)
1900 {
1901         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
1902         GtkWidget         *choice;
1903         GtkTreeModel      *model;
1904         gint               n_items, i;
1905         gint               selected_item = 0;
1906
1907         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
1908                                                                    field);
1909         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
1910         for (i = 0; i < n_items; i++) {
1911                 GtkTreeIter iter;
1912                 gchar      *item;
1913
1914                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
1915                                                                      field, i);
1916                 if (ev_document_forms_form_field_choice_is_item_selected (
1917                             EV_DOCUMENT_FORMS (view->document), field, i)) {
1918                         selected_item = i;
1919                         /* FIXME: we need a get_selected_items function in poppler */
1920                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
1921                                                                        GINT_TO_POINTER (i));
1922                 }
1923
1924                 if (item) {
1925                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
1926                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
1927                                             0, item,
1928                                             1, i,
1929                                             -1);
1930                         g_free (item);
1931                 }
1932         }
1933
1934         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
1935                 GtkCellRenderer  *renderer;
1936                 GtkWidget        *tree_view;
1937                 GtkTreeSelection *selection;
1938
1939                 tree_view = gtk_tree_view_new_with_model (model);
1940                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
1941
1942                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
1943                 if (field_choice->multi_select) {
1944                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
1945                 }
1946
1947                 /* TODO: set selected items */
1948
1949                 renderer = gtk_cell_renderer_text_new ();
1950                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
1951                                                              0,
1952                                                              "choix", renderer,
1953                                                              "text", 0,
1954                                                              NULL);
1955
1956                 choice = gtk_scrolled_window_new (NULL, NULL);
1957                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
1958                                                 GTK_POLICY_AUTOMATIC,
1959                                                 GTK_POLICY_AUTOMATIC);
1960                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
1961                 gtk_widget_show (tree_view);
1962
1963                 g_signal_connect (selection, "changed",
1964                                   G_CALLBACK (ev_view_form_field_choice_changed),
1965                                   field);
1966                 g_signal_connect_after (selection, "changed",
1967                                         G_CALLBACK (ev_view_form_field_destroy),
1968                                         view);
1969         } else if (field_choice->is_editable) { /* ComboBoxEntry */
1970                 gchar *text;
1971
1972                 choice = gtk_combo_box_entry_new_with_model (model, 0);
1973                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
1974                 if (text) {
1975                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
1976                         g_free (text);
1977                 }
1978
1979                 g_signal_connect (choice, "changed",
1980                                   G_CALLBACK (ev_view_form_field_choice_changed),
1981                                   field);
1982                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
1983                                         G_CALLBACK (ev_view_form_field_destroy),
1984                                         view);
1985         } else { /* ComboBoxText */
1986                 GtkCellRenderer *renderer;
1987
1988                 choice = gtk_combo_box_new_with_model (model);
1989                 renderer = gtk_cell_renderer_text_new ();
1990                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
1991                                             renderer, TRUE);
1992                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
1993                                                 renderer,
1994                                                 "text", 0,
1995                                                 NULL);
1996                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
1997                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
1998
1999                 g_signal_connect (choice, "changed",
2000                                   G_CALLBACK (ev_view_form_field_choice_changed),
2001                                   field);
2002                 g_signal_connect_after (choice, "changed",
2003                                         G_CALLBACK (ev_view_form_field_destroy),
2004                                         view);
2005         }
2006
2007         g_object_unref (model);
2008
2009         g_object_weak_ref (G_OBJECT (choice),
2010                            (GWeakNotify)ev_view_form_field_choice_save,
2011                            view);
2012
2013         return choice;
2014 }
2015
2016 static void
2017 ev_view_handle_form_field (EvView      *view,
2018                            EvFormField *field,
2019                            gdouble      x,
2020                            gdouble      y)
2021 {
2022         GtkWidget   *field_widget = NULL;
2023         GList       *form_field_mapping;
2024         EvRectangle  field_area;
2025         GdkRectangle view_area;
2026
2027         if (field->is_read_only)
2028                 return;
2029
2030         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2031                 field_widget = ev_view_form_field_button_create_widget (view, field);
2032         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2033                 field_widget = ev_view_form_field_text_create_widget (view, field);
2034         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2035                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2036         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2037                 /* TODO */
2038         }
2039
2040         /* Form field doesn't require a widget */
2041         if (!field_widget)
2042                 return;
2043
2044         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2045                                 g_object_ref (field),
2046                                 (GDestroyNotify)g_object_unref);
2047
2048         form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, field->page->index);
2049         ev_form_field_mapping_get_area (form_field_mapping, field, &field_area);
2050
2051         doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
2052         view_area.x -= view->scroll_x;
2053         view_area.y -= view->scroll_y;
2054
2055         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2056         gtk_widget_show (field_widget);
2057         gtk_widget_grab_focus (field_widget);
2058 }
2059
2060 /*** GtkWidget implementation ***/
2061
2062 static void
2063 ev_view_size_request_continuous_dual_page (EvView         *view,
2064                                            GtkRequisition *requisition)
2065 {
2066         int max_width;
2067         gint n_pages;
2068         GtkBorder border;
2069
2070         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2071                                      view->scale, &max_width);
2072         compute_border (view, max_width, max_width, &border);
2073
2074         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
2075
2076         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2077         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
2078
2079         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2080                 requisition->width = 1;
2081         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2082                 requisition->width = 1;
2083                 /* FIXME: This could actually be set on one page docs or docs
2084                  * with a strange aspect ratio. */
2085                 /* requisition->height = 1;*/
2086         }
2087 }
2088
2089 static void
2090 ev_view_size_request_continuous (EvView         *view,
2091                                  GtkRequisition *requisition)
2092 {
2093         int max_width;
2094         int n_pages;
2095         GtkBorder border;
2096
2097
2098         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2099                                      view->scale, &max_width);
2100         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2101         compute_border (view, max_width, max_width, &border);
2102
2103         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2104         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
2105
2106         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2107                 requisition->width = 1;
2108         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2109                 requisition->width = 1;
2110                 /* FIXME: This could actually be set on one page docs or docs
2111                  * with a strange aspect ratio. */
2112                 /* requisition->height = 1;*/
2113         }
2114 }
2115
2116 static void
2117 ev_view_size_request_dual_page (EvView         *view,
2118                                 GtkRequisition *requisition)
2119 {
2120         GtkBorder border;
2121         gint width, height;
2122
2123         /* Find the largest of the two. */
2124         ev_page_cache_get_size (view->page_cache,
2125                                 view->current_page,
2126                                 view->rotation,
2127                                 view->scale,
2128                                 &width, &height);
2129         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
2130                 gint width_2, height_2;
2131                 ev_page_cache_get_size (view->page_cache,
2132                                         view->current_page + 1,
2133                                         view->rotation,
2134                                         view->scale,
2135                                         &width_2, &height_2);
2136                 if (width_2 > width) {
2137                         width = width_2;
2138                         height = height_2;
2139                 }
2140         }
2141         compute_border (view, width, height, &border);
2142
2143         requisition->width = ((width + border.left + border.right) * 2) +
2144                 (view->spacing * 3);
2145         requisition->height = (height + border.top + border.bottom) +
2146                 (view->spacing * 2);
2147
2148         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2149                 requisition->width = 1;
2150         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2151                 requisition->width = 1;
2152                 requisition->height = 1;
2153         }
2154 }
2155
2156 static void
2157 ev_view_size_request_single_page (EvView         *view,
2158                                   GtkRequisition *requisition)
2159 {
2160         GtkBorder border;
2161         gint width, height;
2162
2163         ev_page_cache_get_size (view->page_cache,
2164                                 view->current_page,
2165                                 view->rotation,
2166                                 view->scale,
2167                                 &width, &height);
2168         compute_border (view, width, height, &border);
2169
2170         requisition->width = width + border.left + border.right + (2 * view->spacing);
2171         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2172
2173         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2174                 requisition->width = 1;
2175                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2176         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2177                 requisition->width = 1;
2178                 requisition->height = 1;
2179         }
2180 }
2181
2182 static void
2183 ev_view_size_request (GtkWidget      *widget,
2184                       GtkRequisition *requisition)
2185 {
2186         EvView *view = EV_VIEW (widget);
2187
2188         if (view->document == NULL) {
2189                 requisition->width = 1;
2190                 requisition->height = 1;
2191                 return;
2192         }
2193
2194         if (view->presentation) {
2195                 requisition->width = 1;
2196                 requisition->height = 1;
2197                 return;
2198         }
2199
2200         if (view->continuous && view->dual_page)
2201                 ev_view_size_request_continuous_dual_page (view, requisition);
2202         else if (view->continuous)
2203                 ev_view_size_request_continuous (view, requisition);
2204         else if (view->dual_page)
2205                 ev_view_size_request_dual_page (view, requisition);
2206         else
2207                 ev_view_size_request_single_page (view, requisition);
2208 }
2209
2210 static void
2211 ev_view_size_allocate (GtkWidget      *widget,
2212                        GtkAllocation  *allocation)
2213 {
2214         EvView *view = EV_VIEW (widget);
2215         GList  *children, *l;
2216
2217         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2218
2219         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2220             view->sizing_mode == EV_SIZING_BEST_FIT) {
2221
2222                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
2223
2224                 ev_view_size_request (widget, &widget->requisition);
2225         }
2226
2227         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2228         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2229
2230         if (view->document)
2231                 view_update_range_and_current_page (view);
2232
2233         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2234         view->pending_resize = FALSE;
2235
2236         children = gtk_container_get_children (GTK_CONTAINER (widget));
2237         for (l = children; l && l->data; l = g_list_next (l)) {
2238                 EvFormField   *field;
2239                 EvRectangle    field_area;
2240                 GdkRectangle   view_area;
2241                 GList         *form_field_mapping;
2242                 GtkAllocation  child_allocation;
2243                 GtkRequisition child_requisition;
2244                 GtkWidget     *child = (GtkWidget *)l->data;
2245
2246                 field = g_object_get_data (G_OBJECT (child), "form-field");
2247                 if (!field)
2248                         continue;
2249
2250                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2251                                                                              field->page->index);
2252                 ev_form_field_mapping_get_area (form_field_mapping, field, &field_area);
2253
2254                 doc_rect_to_view_rect (view, field->page->index, &field_area, &view_area);
2255                 view_area.x -= view->scroll_x;
2256                 view_area.y -= view->scroll_y;
2257
2258                 gtk_widget_size_request (child, &child_requisition);
2259                 if (child_requisition.width != view_area.width ||
2260                     child_requisition.height != view_area.height)
2261                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2262
2263                 gtk_container_child_get (GTK_CONTAINER (widget),
2264                                          child,
2265                                          "x", &child_allocation.x,
2266                                          "y", &child_allocation.y,
2267                                          NULL);
2268                 if (child_allocation.x != view_area.x ||
2269                     child_allocation.y != view_area.y) {
2270                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2271                 }
2272         }
2273         g_list_free (children);
2274 }
2275
2276 static void
2277 ev_view_realize (GtkWidget *widget)
2278 {
2279         EvView *view = EV_VIEW (widget);
2280
2281         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
2282                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
2283
2284         gdk_window_set_events (view->layout.bin_window,
2285                                (gdk_window_get_events (view->layout.bin_window) |
2286                                 GDK_EXPOSURE_MASK |
2287                                 GDK_BUTTON_PRESS_MASK |
2288                                 GDK_BUTTON_RELEASE_MASK |
2289                                 GDK_SCROLL_MASK |
2290                                 GDK_KEY_PRESS_MASK |
2291                                 GDK_POINTER_MOTION_MASK |
2292                                 GDK_POINTER_MOTION_HINT_MASK |
2293                                 GDK_ENTER_NOTIFY_MASK |
2294                                 GDK_LEAVE_NOTIFY_MASK));
2295
2296         if (view->presentation)
2297                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
2298         else
2299                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
2300 }
2301
2302 static gboolean
2303 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
2304 {
2305         EvView *view = EV_VIEW (widget);
2306         guint state;
2307
2308         state = event->state & gtk_accelerator_get_default_mod_mask ();
2309
2310         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
2311                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
2312
2313                 if (event->direction == GDK_SCROLL_UP ||
2314                     event->direction == GDK_SCROLL_LEFT) {
2315                         if (ev_view_can_zoom_in (view)) {
2316                                 ev_view_zoom_in (view);
2317                         }
2318                 } else {
2319                         if (ev_view_can_zoom_out (view)) {
2320                                 ev_view_zoom_out (view);
2321                         }
2322                 }
2323
2324                 return TRUE;
2325         }
2326
2327         view->jump_to_find_result = FALSE;
2328
2329         /* Shift+Wheel scrolls the in the perpendicular direction */
2330         if (state & GDK_SHIFT_MASK) {
2331                 if (event->direction == GDK_SCROLL_UP)
2332                         event->direction = GDK_SCROLL_LEFT;
2333                 else if (event->direction == GDK_SCROLL_LEFT)
2334                         event->direction = GDK_SCROLL_UP;
2335                 else if (event->direction == GDK_SCROLL_DOWN)
2336                         event->direction = GDK_SCROLL_RIGHT;
2337                 else if (event->direction == GDK_SCROLL_RIGHT)
2338                         event->direction = GDK_SCROLL_DOWN;
2339
2340                 event->state &= ~GDK_SHIFT_MASK;
2341                 state &= ~GDK_SHIFT_MASK;
2342         }
2343
2344         if (state == 0 && view->presentation) {
2345                 switch (event->direction) {
2346                         case GDK_SCROLL_DOWN:
2347                         case GDK_SCROLL_RIGHT:
2348                                 ev_view_next_page (view);
2349                                 break;
2350                         case GDK_SCROLL_UP:
2351                         case GDK_SCROLL_LEFT:
2352                                 ev_view_previous_page (view);
2353                                 break;
2354                 }
2355
2356                 return TRUE;
2357         }
2358
2359         return FALSE;
2360 }
2361
2362 static EvViewSelection *
2363 find_selection_for_page (EvView *view,
2364                          gint    page)
2365 {
2366         GList *list;
2367
2368         for (list = view->selection_info.selections; list != NULL; list = list->next) {
2369                 EvViewSelection *selection;
2370
2371                 selection = (EvViewSelection *) list->data;
2372
2373                 if (selection->page == page)
2374                         return selection;
2375         }
2376
2377         return NULL;
2378 }
2379
2380 static void
2381 draw_end_presentation_page (EvView       *view,
2382                             GdkRectangle *page_area)
2383 {
2384         PangoLayout *layout;
2385         PangoFontDescription *font_desc;
2386         gchar *markup;
2387         const gchar *text = _("End of presentation. Press Escape to exit.");
2388
2389         if (view->presentation_state != EV_PRESENTATION_END)
2390                 return;
2391
2392         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
2393         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
2394         pango_layout_set_markup (layout, markup, -1);
2395         g_free (markup);
2396
2397         font_desc = pango_font_description_new ();
2398         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
2399         pango_layout_set_font_description (layout, font_desc);
2400
2401         gtk_paint_layout (GTK_WIDGET (view)->style,
2402                           view->layout.bin_window,
2403                           GTK_WIDGET_STATE (view),
2404                           FALSE,
2405                           page_area,
2406                           GTK_WIDGET (view),
2407                           NULL,
2408                           page_area->x + 15,
2409                           page_area->y + 15,
2410                           layout);
2411
2412         pango_font_description_free (font_desc);
2413         g_object_unref (layout);
2414 }
2415
2416 static gboolean
2417 ev_view_expose_event (GtkWidget      *widget,
2418                       GdkEventExpose *event)
2419 {
2420         EvView  *view = EV_VIEW (widget);
2421         cairo_t *cr;
2422         gint     i;
2423
2424         if (view->animation && ev_transition_animation_ready (view->animation)) {
2425                 GdkRectangle page_area;
2426                 GtkBorder    border;
2427
2428                 if (get_page_extents (view, view->current_page, &page_area, &border)) {
2429                         cr = gdk_cairo_create (view->layout.bin_window);
2430
2431                         /* normalize to x=0, y=0 */
2432                         cairo_translate (cr, page_area.x, page_area.y);
2433                         page_area.x = page_area.y = 0;
2434
2435                         ev_transition_animation_paint (view->animation, cr, page_area);
2436                         cairo_destroy (cr);
2437                 }
2438
2439                 return TRUE;
2440         }
2441
2442         if (view->presentation) {
2443                 switch (view->presentation_state) {
2444                         case EV_PRESENTATION_END: {
2445                                 GdkRectangle area = {0};
2446
2447                                 area.width = widget->allocation.width;
2448                                 area.height = widget->allocation.height;
2449
2450                                 draw_end_presentation_page (view, &area);
2451                         }
2452                                 return FALSE;
2453                         case EV_PRESENTATION_BLACK:
2454                         case EV_PRESENTATION_WHITE:
2455                                 return FALSE;
2456                         case EV_PRESENTATION_NORMAL:
2457                         default:
2458                                 break;
2459                 }
2460         } else if (view->loading) {
2461                 GdkRectangle area = {0};
2462
2463                 area.width = widget->allocation.width;
2464                 area.height = widget->allocation.height;
2465
2466                 draw_loading_text (view,
2467                                    &area,
2468                                    &(event->area));
2469         }
2470
2471         if (view->document == NULL)
2472                 return FALSE;
2473
2474         cr = gdk_cairo_create (view->layout.bin_window);
2475
2476         for (i = view->start_page; i <= view->end_page; i++) {
2477                 GdkRectangle page_area;
2478                 GtkBorder border;
2479                 gboolean page_ready = TRUE;
2480
2481                 if (!get_page_extents (view, i, &page_area, &border))
2482                         continue;
2483
2484                 page_area.x -= view->scroll_x;
2485                 page_area.y -= view->scroll_y;
2486
2487                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
2488
2489                 if (page_ready && view->find_pages && view->highlight_find_results)
2490                         highlight_find_results (view, i);
2491         }
2492
2493         cairo_destroy (cr);
2494
2495         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
2496                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
2497
2498         return FALSE;
2499 }
2500
2501 static gboolean
2502 ev_view_do_popup_menu (EvView *view,
2503                        gdouble x,
2504                        gdouble y)
2505 {
2506         EvLink  *link;
2507         EvImage *image;
2508
2509         image = ev_view_get_image_at_location (view, x, y);
2510         if (image) {
2511                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
2512                 return TRUE;
2513         }
2514
2515         link = ev_view_get_link_at_location (view, x, y);
2516         if (link) {
2517                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
2518                 return TRUE;
2519         }
2520
2521         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
2522
2523         return TRUE;
2524 }
2525
2526 static gboolean
2527 ev_view_popup_menu (GtkWidget *widget)
2528 {
2529         gint x, y;
2530
2531         gtk_widget_get_pointer (widget, &x, &y);
2532         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
2533 }
2534
2535 static void
2536 get_link_area (EvView       *view,
2537                gint          x,
2538                gint          y,
2539                EvLink       *link,
2540                GdkRectangle *area)
2541 {
2542         EvRectangle  ev_rect;
2543         GList       *link_mapping;
2544         gint         page;
2545         gint         x_offset = 0, y_offset = 0;
2546
2547         x += view->scroll_x;
2548         y += view->scroll_y;
2549
2550         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
2551
2552         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
2553         ev_link_mapping_get_area (link_mapping, link, &ev_rect);
2554
2555         doc_rect_to_view_rect (view, page, &ev_rect, area);
2556         area->y -= view->scroll_y ;
2557 }
2558
2559 static gboolean
2560 ev_view_query_tooltip (GtkWidget         *widget,
2561                        gint               x,
2562                        gint               y,
2563                        gboolean           keyboard_tip,
2564                        GtkTooltip        *tooltip)
2565 {
2566         EvView *view = EV_VIEW (widget);
2567         EvLink *link;
2568         gchar  *text;
2569
2570         link = ev_view_get_link_at_location (view, x, y);
2571         if (!link)
2572                 return FALSE;
2573
2574         text = tip_from_link (view, link);
2575         if (text && g_utf8_validate (text, -1, NULL)) {
2576                 GdkRectangle link_area;
2577
2578                 get_link_area (view, x, y, link, &link_area);
2579                 gtk_tooltip_set_text (tooltip, text);
2580                 gtk_tooltip_set_tip_area (tooltip, &link_area);
2581         }
2582         g_free (text);
2583
2584         return TRUE;
2585 }
2586
2587 static void
2588 start_selection_for_event (EvView         *view,
2589                            GdkEventButton *event)
2590 {
2591         EvSelectionStyle style;
2592
2593         clear_selection (view);
2594
2595         view->selection_info.start.x = event->x + view->scroll_x;
2596         view->selection_info.start.y = event->y + view->scroll_y;
2597
2598         switch (event->type) {
2599                 case GDK_2BUTTON_PRESS:
2600                         style = EV_SELECTION_STYLE_WORD;
2601                         break;
2602                 case GDK_3BUTTON_PRESS:
2603                         style = EV_SELECTION_STYLE_LINE;
2604                         break;
2605                 default:
2606                         style = EV_SELECTION_STYLE_GLYPH;
2607                         break;
2608         }
2609
2610         view->selection_info.style = style;
2611 }
2612
2613 static gboolean
2614 ev_view_button_press_event (GtkWidget      *widget,
2615                             GdkEventButton *event)
2616 {
2617         EvView *view = EV_VIEW (widget);
2618
2619         if (!view->document)
2620                 return FALSE;
2621
2622         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
2623                 gtk_widget_grab_focus (widget);
2624         }
2625
2626         view->pressed_button = event->button;
2627         view->selection_info.in_drag = FALSE;
2628
2629         if (view->scroll_info.autoscrolling)
2630                 return TRUE;
2631
2632         switch (event->button) {
2633                 case 1: {
2634                         EvImage *image;
2635                         EvFormField *field;
2636
2637                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
2638                                 if (event->type == GDK_3BUTTON_PRESS) {
2639                                         start_selection_for_event (view, event);
2640                                 } else if (location_in_selected_text (view,
2641                                                                event->x + view->scroll_x,
2642                                                                event->y + view->scroll_y)) {
2643                                         view->selection_info.in_drag = TRUE;
2644                                 } else {
2645                                         start_selection_for_event (view, event);
2646                                 }
2647
2648                                 gtk_widget_queue_draw (widget);
2649                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
2650                                 ev_view_remove_all (view);
2651                                 ev_view_handle_form_field (view, field, event->x, event->y);
2652                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
2653                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
2654                                 if (view->image_dnd_info.image)
2655                                         g_object_unref (view->image_dnd_info.image);
2656                                 view->image_dnd_info.image = g_object_ref (image);
2657                                 view->image_dnd_info.in_drag = TRUE;
2658
2659                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
2660                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
2661                         } else {
2662                                 ev_view_remove_all (view);
2663
2664                                 if (EV_IS_SELECTION (view->document))
2665                                         start_selection_for_event (view, event);
2666                         }
2667                 }
2668                         return TRUE;
2669                 case 2:
2670                         /* use root coordinates as reference point because
2671                          * scrolling changes window relative coordinates */
2672                         view->drag_info.start.x = event->x_root;
2673                         view->drag_info.start.y = event->y_root;
2674                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
2675                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
2676
2677                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
2678
2679                         return TRUE;
2680                 case 3:
2681                         view->scroll_info.start_y = event->y;
2682                         return ev_view_do_popup_menu (view, event->x, event->y);
2683         }
2684
2685         return FALSE;
2686 }
2687
2688 static void
2689 ev_view_remove_all (EvView *view)
2690 {
2691         GList *children, *child;
2692
2693         children = gtk_container_get_children (GTK_CONTAINER (view));
2694         for (child = children; child && child->data; child = g_list_next (child)) {
2695                 gtk_container_remove (GTK_CONTAINER (view),
2696                                       GTK_WIDGET (child->data));
2697         }
2698         g_list_free (children);
2699 }
2700
2701 /*** Drag and Drop ***/
2702 static void
2703 ev_view_drag_data_get (GtkWidget        *widget,
2704                        GdkDragContext   *context,
2705                        GtkSelectionData *selection_data,
2706                        guint             info,
2707                        guint             time)
2708 {
2709         EvView *view = EV_VIEW (widget);
2710
2711         switch (info) {
2712                 case TARGET_DND_TEXT:
2713                         if (EV_IS_SELECTION (view->document) &&
2714                             view->selection_info.selections) {
2715                                 gchar *text;
2716
2717                                 text = get_selected_text (view);
2718                                 gtk_selection_data_set_text (selection_data,
2719                                                              text,
2720                                                              strlen (text));
2721                                 g_free (text);
2722                         }
2723                         break;
2724                 case TARGET_DND_IMAGE:
2725                         if (view->image_dnd_info.image) {
2726                                 GdkPixbuf *pixbuf;
2727
2728                                 ev_document_doc_mutex_lock ();
2729                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
2730                                                                        view->image_dnd_info.image);
2731                                 ev_document_doc_mutex_unlock ();
2732
2733                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
2734                                 g_object_unref (pixbuf);
2735                         }
2736                         break;
2737                 case TARGET_DND_URI:
2738                         if (view->image_dnd_info.image) {
2739                                 GdkPixbuf   *pixbuf;
2740                                 const gchar *tmp_uri;
2741                                 gchar       *uris[2];
2742
2743                                 ev_document_doc_mutex_lock ();
2744                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
2745                                                                        view->image_dnd_info.image);
2746                                 ev_document_doc_mutex_unlock ();
2747
2748                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
2749                                 g_object_unref (pixbuf);
2750
2751                                 uris[0] = (gchar *)tmp_uri;
2752                                 uris[1] = NULL;
2753                                 gtk_selection_data_set_uris (selection_data, uris);
2754                         }
2755         }
2756 }
2757
2758 static gboolean
2759 ev_view_drag_motion (GtkWidget      *widget,
2760                      GdkDragContext *context,
2761                      gint            x,
2762                      gint            y,
2763                      guint           time)
2764 {
2765         if (gtk_drag_get_source_widget (context) == widget)
2766                 gdk_drag_status (context, 0, time);
2767         else
2768                 gdk_drag_status (context, context->suggested_action, time);
2769
2770         return TRUE;
2771 }
2772
2773 static gboolean
2774 selection_update_idle_cb (EvView *view)
2775 {
2776         compute_selections (view,
2777                             view->selection_info.style,
2778                             &view->selection_info.start,
2779                             &view->motion);
2780         view->selection_update_id = 0;
2781         return FALSE;
2782 }
2783
2784 static gboolean
2785 selection_scroll_timeout_cb (EvView *view)
2786 {
2787         gint x, y, shift = 0;
2788         GtkWidget *widget = GTK_WIDGET (view);
2789
2790         gtk_widget_get_pointer (widget, &x, &y);
2791
2792         if (y > widget->allocation.height) {
2793                 shift = (y - widget->allocation.height) / 2;
2794         } else if (y < 0) {
2795                 shift = y / 2;
2796         }
2797
2798         if (shift)
2799                 gtk_adjustment_set_value (view->vadjustment,
2800                                           CLAMP (view->vadjustment->value + shift,
2801                                           view->vadjustment->lower,
2802                                           view->vadjustment->upper -
2803                                           view->vadjustment->page_size));
2804
2805         if (x > widget->allocation.width) {
2806                 shift = (x - widget->allocation.width) / 2;
2807         } else if (x < 0) {
2808                 shift = x / 2;
2809         }
2810
2811         if (shift)
2812                 gtk_adjustment_set_value (view->hadjustment,
2813                                           CLAMP (view->hadjustment->value + shift,
2814                                           view->hadjustment->lower,
2815                                           view->hadjustment->upper -
2816                                           view->hadjustment->page_size));
2817
2818         return TRUE;
2819 }
2820
2821 static gboolean
2822 ev_view_drag_update_momentum (EvView *view)
2823 {
2824         int i;
2825         if (!view->drag_info.in_drag)
2826                 return FALSE;
2827
2828         for (i = DRAG_HISTORY - 1; i > 0; i--) {
2829                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
2830                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
2831         }
2832
2833         /* Momentum is a moving average of 10ms granularity over
2834          * the last 100ms with each 10ms stored in buffer.
2835          */
2836
2837         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
2838         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
2839
2840         return TRUE;
2841 }
2842
2843 static gboolean
2844 ev_view_scroll_drag_release (EvView *view)
2845 {
2846         gdouble dhadj_value, dvadj_value;
2847         gdouble oldhadjustment, oldvadjustment;
2848
2849         view->drag_info.momentum.x /= 1.2;
2850         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
2851
2852         dhadj_value = view->hadjustment->page_size *
2853                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
2854         dvadj_value = view->vadjustment->page_size *
2855                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
2856
2857         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
2858         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
2859
2860         if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
2861            ((oldhadjustment + dhadj_value) < 0))
2862                 view->drag_info.momentum.x *= -0.5; /* 0.5 rather than 1 means the edges absorb some momentum */
2863         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
2864            ((oldvadjustment + dvadj_value) < 0))
2865                 view->drag_info.momentum.y *= -0.5;
2866
2867         gtk_adjustment_set_value (view->hadjustment,
2868                                 MIN (oldhadjustment + dhadj_value,
2869                                 view->hadjustment->upper - view->hadjustment->page_size));
2870         gtk_adjustment_set_value (view->vadjustment,
2871                                 MIN (oldvadjustment + dvadj_value,
2872                                 view->vadjustment->upper - view->vadjustment->page_size));
2873
2874         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
2875            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
2876                 return FALSE;
2877         else
2878                 return TRUE;
2879 }
2880
2881 static gboolean
2882 ev_view_motion_notify_event (GtkWidget      *widget,
2883                              GdkEventMotion *event)
2884 {
2885         EvView *view = EV_VIEW (widget);
2886         gint x, y;
2887
2888         if (!view->document)
2889                 return FALSE;
2890
2891
2892         if (event->is_hint || event->window != view->layout.bin_window) {
2893             gtk_widget_get_pointer (widget, &x, &y);
2894         } else {
2895             x = event->x;
2896             y = event->y;
2897         }
2898
2899         if (view->scroll_info.autoscrolling) {
2900                 view->scroll_info.last_y = y;
2901                 return TRUE;
2902         }
2903
2904         if (view->selection_info.in_drag) {
2905                 if (gtk_drag_check_threshold (widget,
2906                                               view->selection_info.start.x,
2907                                               view->selection_info.start.y,
2908                                               x, y)) {
2909                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
2910
2911                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
2912
2913                         gtk_drag_begin (widget, target_list,
2914                                         GDK_ACTION_COPY,
2915                                         1, (GdkEvent *)event);
2916
2917                         view->selection_info.in_drag = FALSE;
2918
2919                         gtk_target_list_unref (target_list);
2920
2921                         return TRUE;
2922                 }
2923         } else if (view->image_dnd_info.in_drag) {
2924                 if (gtk_drag_check_threshold (widget,
2925                                               view->selection_info.start.x,
2926                                               view->selection_info.start.y,
2927                                               x, y)) {
2928                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
2929
2930                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
2931                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
2932
2933                         gtk_drag_begin (widget, target_list,
2934                                         GDK_ACTION_COPY,
2935                                         1, (GdkEvent *)event);
2936
2937                         view->image_dnd_info.in_drag = FALSE;
2938
2939                         gtk_target_list_unref (target_list);
2940
2941                         return TRUE;
2942                 }
2943         }
2944
2945         switch (view->pressed_button) {
2946         case 1:
2947                 /* For the Evince 0.4.x release, we limit selection to un-rotated
2948                  * documents only.
2949                  */
2950                 if (view->rotation != 0)
2951                         return FALSE;
2952
2953                 /* Schedule timeout to scroll during selection and additionally
2954                  * scroll once to allow arbitrary speed. */
2955                 if (!view->selection_scroll_id)
2956                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
2957                                                                (GSourceFunc)selection_scroll_timeout_cb,
2958                                                                view);
2959                 else
2960                     selection_scroll_timeout_cb (view);
2961
2962                 view->selection_info.in_selection = TRUE;
2963                 view->motion.x = x + view->scroll_x;
2964                 view->motion.y = y + view->scroll_y;
2965
2966                 /* Queue an idle to handle the motion.  We do this because
2967                  * handling any selection events in the motion could be slower
2968                  * than new motion events reach us.  We always put it in the
2969                  * idle to make sure we catch up and don't visibly lag the
2970                  * mouse. */
2971                 if (!view->selection_update_id)
2972                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
2973
2974                 return TRUE;
2975         case 2:
2976                 if (!view->drag_info.in_drag) {
2977                         gboolean start;
2978                         int i;
2979
2980                         start = gtk_drag_check_threshold (widget,
2981                                                           view->drag_info.start.x,
2982                                                           view->drag_info.start.y,
2983                                                           event->x_root,
2984                                                           event->y_root);
2985                         view->drag_info.in_drag = start;
2986                         view->drag_info.drag_timeout_id = g_timeout_add (10,
2987                                 (GSourceFunc)ev_view_drag_update_momentum, view);
2988                         /* Set 100 to choose how long it takes to build up momentum */
2989                         /* Clear out previous momentum info: */
2990                         for (i = 0; i < DRAG_HISTORY; i++) {
2991                                 view->drag_info.buffer[i].x = event->x;
2992                                 view->drag_info.buffer[i].y = event->y;
2993                         }
2994                         view->drag_info.momentum.x = 0;
2995                         view->drag_info.momentum.y = 0;
2996                 }
2997
2998                 if (view->drag_info.in_drag) {
2999                         int dx, dy;
3000                         gdouble dhadj_value, dvadj_value;
3001
3002                         view->drag_info.buffer[0].x = event->x;
3003                         view->drag_info.buffer[0].y = event->y;
3004
3005                         dx = event->x_root - view->drag_info.start.x;
3006                         dy = event->y_root - view->drag_info.start.y;
3007
3008                         dhadj_value = view->hadjustment->page_size *
3009                                       (gdouble)dx / widget->allocation.width;
3010                         dvadj_value = view->vadjustment->page_size *
3011                                       (gdouble)dy / widget->allocation.height;
3012
3013                         /* clamp scrolling to visible area */
3014                         gtk_adjustment_set_value (view->hadjustment,
3015                                                   MIN(view->drag_info.hadj - dhadj_value,
3016                                                       view->hadjustment->upper -
3017                                                       view->hadjustment->page_size));
3018                         gtk_adjustment_set_value (view->vadjustment,
3019                                                   MIN(view->drag_info.vadj - dvadj_value,
3020                                                       view->vadjustment->upper -
3021                                                       view->vadjustment->page_size));
3022
3023                         return TRUE;
3024                 }
3025
3026                 break;
3027         default:
3028                 ev_view_handle_cursor_over_xy (view, x, y);
3029         }
3030
3031         return FALSE;
3032 }
3033
3034 static gboolean
3035 ev_view_button_release_event (GtkWidget      *widget,
3036                               GdkEventButton *event)
3037 {
3038         EvView *view = EV_VIEW (widget);
3039         EvLink *link = NULL;
3040
3041         view->image_dnd_info.in_drag = FALSE;
3042
3043         if (view->scroll_info.autoscrolling) {
3044                 ev_view_autoscroll_stop (view);
3045                 view->pressed_button = -1;
3046
3047                 return TRUE;
3048         }
3049
3050         if (view->drag_info.in_drag) {
3051                 view->drag_info.release_timeout_id =
3052                         g_timeout_add (20,
3053                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3054         }
3055
3056         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3057                 link = ev_view_get_link_at_location (view, event->x, event->y);
3058         }
3059
3060         view->drag_info.in_drag = FALSE;
3061
3062         if (view->pressed_button == 2) {
3063                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3064         }
3065
3066         view->pressed_button = -1;
3067
3068         if (view->selection_scroll_id) {
3069             g_source_remove (view->selection_scroll_id);
3070             view->selection_scroll_id = 0;
3071         }
3072         if (view->selection_update_id) {
3073             g_source_remove (view->selection_update_id);
3074             view->selection_update_id = 0;
3075         }
3076
3077         if (!view->selection_info.in_selection &&
3078             view->selection_info.style != EV_SELECTION_STYLE_GLYPH) {
3079                 compute_selections (view,
3080                                     view->selection_info.style,
3081                                     &(view->selection_info.start),
3082                                     &(view->selection_info.start));
3083         }
3084
3085         if (view->selection_info.selections) {
3086                 clear_link_selected (view);
3087                 ev_view_update_primary_selection (view);
3088
3089                 if (view->selection_info.in_drag) {
3090                         clear_selection (view);
3091                         gtk_widget_queue_draw (widget);
3092                 }
3093
3094                 view->selection_info.in_drag = FALSE;
3095         } else if (link) {
3096                 if (event->button == 2) {
3097                         EvLinkAction    *action;
3098                         EvLinkActionType type;
3099
3100                         action = ev_link_get_action (link);
3101                         if (!action)
3102                                 return FALSE;
3103
3104                         type = ev_link_action_get_action_type (action);
3105                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3106                                 g_signal_emit (view,
3107                                                signals[SIGNAL_EXTERNAL_LINK],
3108                                                0, action);
3109                         }
3110                 } else {
3111                         ev_view_handle_link (view, link);
3112                 }
3113         } else if (view->presentation) {
3114                 switch (event->button) {
3115                         case 1:
3116                                 ev_view_next_page (view);
3117                                 return TRUE;
3118                         case 3:
3119                                 ev_view_previous_page (view);
3120                                 return TRUE;
3121                 }
3122         }
3123
3124         return FALSE;
3125 }
3126
3127 /* Goto Window */
3128 /* Cut and paste from gtkwindow.c */
3129 static void
3130 send_focus_change (GtkWidget *widget,
3131                    gboolean   in)
3132 {
3133         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3134
3135         g_object_ref (widget);
3136
3137         if (in)
3138                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3139         else
3140                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3141
3142         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3143         fevent->focus_change.window = g_object_ref (widget->window);
3144         fevent->focus_change.in = in;
3145
3146         gtk_widget_event (widget, fevent);
3147
3148         g_object_notify (G_OBJECT (widget), "has-focus");
3149
3150         g_object_unref (widget);
3151         gdk_event_free (fevent);
3152 }
3153
3154 static void
3155 ev_view_goto_window_hide (EvView *view)
3156 {
3157         /* send focus-in event */
3158         send_focus_change (view->goto_entry, FALSE);
3159         gtk_widget_hide (view->goto_window);
3160         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3161 }
3162
3163 static gboolean
3164 ev_view_goto_window_delete_event (GtkWidget   *widget,
3165                                   GdkEventAny *event,
3166                                   EvView      *view)
3167 {
3168         ev_view_goto_window_hide (view);
3169
3170         return TRUE;
3171 }
3172
3173 static gboolean
3174 key_is_numeric (guint keyval)
3175 {
3176         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3177                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3178 }
3179
3180 static gboolean
3181 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3182                                      GdkEventKey *event,
3183                                      EvView      *view)
3184 {
3185         switch (event->keyval) {
3186                 case GDK_Escape:
3187                 case GDK_Tab:
3188                 case GDK_KP_Tab:
3189                 case GDK_ISO_Left_Tab:
3190                         ev_view_goto_window_hide (view);
3191                         return TRUE;
3192                 case GDK_Return:
3193                 case GDK_KP_Enter:
3194                 case GDK_ISO_Enter:
3195                 case GDK_BackSpace:
3196                 case GDK_Delete:
3197                         return FALSE;
3198                 default:
3199                         if (!key_is_numeric (event->keyval))
3200                                 return TRUE;
3201         }
3202
3203         return FALSE;
3204 }
3205
3206 static gboolean
3207 ev_view_goto_window_button_press_event (GtkWidget      *widget,
3208                                         GdkEventButton *event,
3209                                         EvView         *view)
3210 {
3211         ev_view_goto_window_hide (view);
3212
3213         return TRUE;
3214 }
3215
3216 static void
3217 ev_view_goto_entry_activate (GtkEntry *entry,
3218                              EvView   *view)
3219 {
3220         const gchar *text;
3221         gint         page;
3222
3223         text = gtk_entry_get_text (entry);
3224         page = atoi (text) - 1;
3225
3226         ev_view_goto_window_hide (view);
3227
3228         if (page >= 0 &&
3229             page < ev_page_cache_get_n_pages (view->page_cache))
3230                 ev_page_cache_set_current_page (view->page_cache, page);
3231 }
3232
3233 static void
3234 ev_view_goto_window_create (EvView *view)
3235 {
3236         GtkWidget *frame, *hbox, *toplevel, *label;
3237
3238         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
3239
3240         if (view->goto_window) {
3241                 if (GTK_WINDOW (toplevel)->group)
3242                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3243                                                      GTK_WINDOW (view->goto_window));
3244                 else if (GTK_WINDOW (view->goto_window)->group)
3245                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
3246                                                         GTK_WINDOW (view->goto_window));
3247                 return;
3248         }
3249
3250         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
3251         gtk_window_set_screen (GTK_WINDOW (view->goto_window),
3252                                gtk_widget_get_screen (GTK_WIDGET (view)));
3253
3254         if (GTK_WINDOW (toplevel)->group)
3255                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3256                                              GTK_WINDOW (view->goto_window));
3257
3258         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
3259
3260         g_signal_connect (view->goto_window, "delete_event",
3261                           G_CALLBACK (ev_view_goto_window_delete_event),
3262                           view);
3263         g_signal_connect (view->goto_window, "key_press_event",
3264                           G_CALLBACK (ev_view_goto_window_key_press_event),
3265                           view);
3266         g_signal_connect (view->goto_window, "button_press_event",
3267                           G_CALLBACK (ev_view_goto_window_button_press_event),
3268                           view);
3269
3270         frame = gtk_frame_new (NULL);
3271         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
3272         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
3273         gtk_widget_show (frame);
3274
3275         hbox = gtk_hbox_new (FALSE, 0);
3276         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
3277         gtk_container_add (GTK_CONTAINER (frame), hbox);
3278         gtk_widget_show (hbox);
3279
3280         label = gtk_label_new(_("Jump to page:"));
3281         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
3282         gtk_widget_show (label);
3283         gtk_widget_realize (label);
3284
3285         view->goto_entry = gtk_entry_new ();
3286         g_signal_connect (view->goto_entry, "activate",
3287                           G_CALLBACK (ev_view_goto_entry_activate),
3288                           view);
3289         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
3290         gtk_widget_show (view->goto_entry);
3291         gtk_widget_realize (view->goto_entry);
3292 }
3293
3294 static void
3295 ev_view_goto_entry_grab_focus (EvView *view)
3296 {
3297         GtkWidgetClass *entry_parent_class;
3298
3299         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
3300         (entry_parent_class->grab_focus) (view->goto_entry);
3301
3302         send_focus_change (view->goto_entry, TRUE);
3303 }
3304
3305 static void
3306 ev_view_goto_window_send_key_event (EvView   *view,
3307                                     GdkEvent *event)
3308 {
3309         GdkEventKey *new_event;
3310         GdkScreen   *screen;
3311
3312         /* Move goto window off screen */
3313         screen = gtk_widget_get_screen (GTK_WIDGET (view));
3314         gtk_window_move (GTK_WINDOW (view->goto_window),
3315                          gdk_screen_get_width (screen) + 1,
3316                          gdk_screen_get_height (screen) + 1);
3317         gtk_widget_show (view->goto_window);
3318
3319         new_event = (GdkEventKey *) gdk_event_copy (event);
3320         g_object_unref (new_event->window);
3321         new_event->window = g_object_ref (view->goto_window->window);
3322         gtk_widget_realize (view->goto_window);
3323
3324         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
3325         gdk_event_free ((GdkEvent *)new_event);
3326         gtk_widget_hide (view->goto_window);
3327 }
3328
3329 static gboolean
3330 ev_view_key_press_event (GtkWidget   *widget,
3331                          GdkEventKey *event)
3332 {
3333         EvView *view = EV_VIEW (widget);
3334         EvPresentationState current;
3335
3336         if (!view->document)
3337                 return FALSE;
3338
3339         if (!view->presentation ||
3340             view->presentation_state == EV_PRESENTATION_END)
3341                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3342
3343
3344         current = view->presentation_state;
3345
3346         switch (event->keyval) {
3347                 case GDK_b:
3348                 case GDK_B:
3349                 case GDK_period:
3350                 case GDK_KP_Decimal:
3351                         view->presentation_state =
3352                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
3353                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
3354                         break;
3355                 case GDK_w:
3356                 case GDK_W:
3357                         view->presentation_state =
3358                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
3359                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
3360                         break;
3361                 default:
3362                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
3363                             view->presentation_state == EV_PRESENTATION_WHITE) {
3364                                 view->presentation_state = EV_PRESENTATION_NORMAL;
3365                         }
3366         }
3367
3368         if (current == view->presentation_state) {
3369                 if (ev_page_cache_get_n_pages (view->page_cache) > 1 &&
3370                     key_is_numeric (event->keyval)) {
3371                         gint x, y;
3372
3373                         ev_view_goto_window_create (view);
3374                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
3375                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
3376                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
3377                         gtk_widget_show (view->goto_window);
3378                         ev_view_goto_entry_grab_focus (view);
3379
3380                         return TRUE;
3381                 }
3382
3383                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3384         }
3385
3386         switch (view->presentation_state) {
3387                 case EV_PRESENTATION_NORMAL:
3388                 case EV_PRESENTATION_BLACK:
3389                         gdk_window_set_background (view->layout.bin_window,
3390                                                    &widget->style->black);
3391                         break;
3392                 case EV_PRESENTATION_WHITE:
3393                         gdk_window_set_background (view->layout.bin_window,
3394                                                    &widget->style->white);
3395                         break;
3396                 default:
3397                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3398         }
3399
3400         gtk_widget_queue_draw (widget);
3401         return TRUE;
3402 }
3403
3404 static gint
3405 ev_view_focus_in (GtkWidget     *widget,
3406                   GdkEventFocus *event)
3407 {
3408         if (EV_VIEW (widget)->pixbuf_cache)
3409                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3410         gtk_widget_queue_draw (widget);
3411
3412         return FALSE;
3413 }
3414
3415 static gint
3416 ev_view_focus_out (GtkWidget     *widget,
3417                      GdkEventFocus *event)
3418 {
3419         if (EV_VIEW (widget)->goto_window)
3420                 ev_view_goto_window_hide (EV_VIEW (widget));
3421
3422         if (EV_VIEW (widget)->pixbuf_cache)
3423                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3424         gtk_widget_queue_draw (widget);
3425
3426         return FALSE;
3427 }
3428
3429 static gboolean
3430 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3431 {
3432         EvView *view = EV_VIEW (widget);
3433
3434         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
3435                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3436
3437         return FALSE;
3438 }
3439
3440 static gboolean
3441 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3442 {
3443         EvView *view = EV_VIEW (widget);
3444
3445         ev_view_handle_cursor_over_xy (view, event->x, event->y);
3446
3447         return FALSE;
3448 }
3449
3450 static void
3451 ev_view_style_set (GtkWidget *widget,
3452                    GtkStyle  *old_style)
3453 {
3454         if (EV_VIEW (widget)->pixbuf_cache)
3455                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3456
3457         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
3458 }
3459
3460 /*** Drawing ***/
3461
3462 static guint32
3463 ev_gdk_color_to_rgb (const GdkColor *color)
3464 {
3465   guint32 result;
3466   result = (0xff0000 | (color->red & 0xff00));
3467   result <<= 8;
3468   result |= ((color->green & 0xff00) | (color->blue >> 8));
3469   return result;
3470 }
3471
3472 static void
3473 draw_rubberband (GtkWidget *widget, GdkWindow *window,
3474                  const GdkRectangle *rect, guchar alpha)
3475 {
3476         GdkGC *gc;
3477         GdkPixbuf *pixbuf;
3478         GdkColor *fill_color_gdk;
3479         guint fill_color;
3480
3481         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
3482         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
3483
3484         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
3485                                  rect->width, rect->height);
3486         gdk_pixbuf_fill (pixbuf, fill_color);
3487
3488         gdk_draw_pixbuf (window, NULL, pixbuf,
3489                          0, 0,
3490                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3491                          rect->width, rect->height,
3492                          GDK_RGB_DITHER_NONE,
3493                          0, 0);
3494
3495         g_object_unref (pixbuf);
3496
3497         gc = gdk_gc_new (window);
3498         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
3499         gdk_draw_rectangle (window, gc, FALSE,
3500                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3501                             rect->width - 1,
3502                             rect->height - 1);
3503         g_object_unref (gc);
3504
3505         gdk_color_free (fill_color_gdk);
3506 }
3507
3508
3509 static void
3510 highlight_find_results (EvView *view, int page)
3511 {
3512         gint i, n_results = 0;
3513
3514         n_results = ev_view_find_get_n_results (view, page);
3515
3516         for (i = 0; i < n_results; i++) {
3517                 EvRectangle *rectangle;
3518                 GdkRectangle view_rectangle;
3519                 guchar alpha;
3520
3521                 if (i == view->find_result && page == view->current_page) {
3522                         alpha = 0x90;
3523                 } else {
3524                         alpha = 0x20;
3525                 }
3526
3527                 rectangle = ev_view_find_get_result (view, page, i);
3528                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
3529                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
3530                                  &view_rectangle, alpha);
3531         }
3532 }
3533
3534 static void
3535 draw_loading_text (EvView       *view,
3536                    GdkRectangle *page_area,
3537                    GdkRectangle *expose_area)
3538 {
3539         cairo_t *cr;
3540         gint     width, height;
3541
3542         if (!view->loading_text) {
3543                 const gchar *loading_text = _("Loading...");
3544                 PangoLayout *layout;
3545                 PangoFontDescription *font_desc;
3546                 PangoRectangle logical_rect;
3547                 gint target_width;
3548                 gdouble real_scale;
3549
3550                 ev_document_fc_mutex_lock ();
3551
3552                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
3553
3554                 font_desc = pango_font_description_new ();
3555
3556                 /* We set the font to be 10 points, get the size, and scale appropriately */
3557                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
3558                 pango_layout_set_font_description (layout, font_desc);
3559                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
3560
3561                 target_width = MAX (page_area->width / 2, 1);
3562                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
3563                 pango_font_description_set_size (font_desc, (int)real_scale);
3564                 pango_layout_set_font_description (layout, font_desc);
3565                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
3566
3567                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
3568                                                                  logical_rect.width,
3569                                                                  logical_rect.height);
3570                 cr = cairo_create (view->loading_text);
3571                 cairo_set_source_rgb (cr,
3572                                       155 / (double)255,
3573                                       155 / (double)255,
3574                                       155 / (double)255);
3575                 pango_cairo_show_layout (cr, layout);
3576                 cairo_destroy (cr);
3577
3578                 pango_font_description_free (font_desc);
3579                 g_object_unref (layout);
3580
3581                 ev_document_fc_mutex_unlock ();
3582         }
3583
3584         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
3585         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
3586
3587         cr = gdk_cairo_create (view->layout.bin_window);
3588         cairo_translate (cr,
3589                          page_area->x + width,
3590                          page_area->y + height);
3591         cairo_set_source_surface (cr, view->loading_text, 0, 0);
3592         cairo_paint (cr);
3593         cairo_destroy (cr);
3594 }
3595
3596 static void
3597 draw_one_page (EvView       *view,
3598                gint          page,
3599                cairo_t      *cr,
3600                GdkRectangle *page_area,
3601                GtkBorder    *border,
3602                GdkRectangle *expose_area,
3603                gboolean     *page_ready)
3604 {
3605         GdkRectangle overlap;
3606         GdkRectangle real_page_area;
3607
3608         g_assert (view->document);
3609
3610         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
3611                 return;
3612
3613         /* Render the document itself */
3614         real_page_area = *page_area;
3615
3616         real_page_area.x += border->left;
3617         real_page_area.y += border->top;
3618         real_page_area.width -= (border->left + border->right);
3619         real_page_area.height -= (border->top + border->bottom);
3620         *page_ready = TRUE;
3621
3622         if (!view->presentation) {
3623                 gint current_page;
3624
3625                 current_page = ev_page_cache_get_current_page (view->page_cache);
3626                 ev_document_misc_paint_one_page (view->layout.bin_window,
3627                                                  GTK_WIDGET (view),
3628                                                  page_area, border,
3629                                                  page == current_page);
3630         }
3631
3632         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
3633                 gint             width, height;
3634                 gint             page_width, page_height;
3635                 cairo_surface_t *page_surface = NULL;
3636                 gint             selection_width, selection_height;
3637                 cairo_surface_t *selection_surface = NULL;
3638
3639                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
3640
3641                 if (!page_surface) {
3642                         if (!view->presentation) {
3643                                 draw_loading_text (view,
3644                                                    &real_page_area,
3645                                                    expose_area);
3646                         }
3647
3648                         *page_ready = FALSE;
3649
3650                         return;
3651                 }
3652
3653                 ev_page_cache_get_size (view->page_cache,
3654                                         page, view->rotation,
3655                                         view->scale,
3656                                         &width, &height);
3657
3658                 page_width = cairo_image_surface_get_width (page_surface);
3659                 page_height = cairo_image_surface_get_height (page_surface);
3660
3661                 cairo_save (cr);
3662                 cairo_translate (cr, overlap.x, overlap.y);
3663
3664                 if (width != page_width || height != page_height) {
3665                         cairo_pattern_set_filter (cairo_get_source (cr),
3666                                                   CAIRO_FILTER_FAST);
3667                         cairo_scale (cr,
3668                                      (gdouble)width / page_width,
3669                                      (gdouble)height / page_height);
3670                 }
3671
3672                 cairo_surface_set_device_offset (page_surface,
3673                                                  overlap.x - real_page_area.x,
3674                                                  overlap.y - real_page_area.y);
3675                 cairo_set_source_surface (cr, page_surface, 0, 0);
3676                 cairo_paint (cr);
3677                 cairo_restore (cr);
3678
3679                 /* Get the selection pixbuf iff we have something to draw */
3680                 if (find_selection_for_page (view, page) &&
3681                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
3682                         selection_surface =
3683                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
3684                                                                        page,
3685                                                                        view->scale,
3686                                                                        NULL);
3687                 }
3688
3689                 if (!selection_surface) {
3690                         return;
3691                 }
3692
3693                 selection_width = cairo_image_surface_get_width (selection_surface);
3694                 selection_height = cairo_image_surface_get_height (selection_surface);
3695
3696                 cairo_save (cr);
3697                 cairo_translate (cr, overlap.x, overlap.y);
3698
3699                 if (width != selection_width || height != selection_height) {
3700                         cairo_pattern_set_filter (cairo_get_source (cr),
3701                                                   CAIRO_FILTER_FAST);
3702                         cairo_scale (cr,
3703                                      (gdouble)width / selection_width,
3704                                      (gdouble)height / selection_height);
3705                 }
3706
3707                 cairo_surface_set_device_offset (selection_surface,
3708                                                  overlap.x - real_page_area.x,
3709                                                  overlap.y - real_page_area.y);
3710                 cairo_set_source_surface (cr, selection_surface, 0, 0);
3711                 cairo_paint (cr);
3712                 cairo_restore (cr);
3713         }
3714 }
3715
3716 /*** GObject functions ***/
3717
3718 static void
3719 ev_view_finalize (GObject *object)
3720 {
3721         EvView *view = EV_VIEW (object);
3722
3723         clear_selection (view);
3724         clear_link_selected (view);
3725
3726         if (view->image_dnd_info.image)
3727                 g_object_unref (view->image_dnd_info.image);
3728         view->image_dnd_info.image = NULL;
3729
3730         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
3731 }
3732
3733 static void
3734 ev_view_destroy (GtkObject *object)
3735 {
3736         EvView *view = EV_VIEW (object);
3737
3738         if (view->document) {
3739                 g_object_unref (view->document);
3740                 view->document = NULL;
3741         }
3742
3743         if (view->pixbuf_cache) {
3744                 g_object_unref (view->pixbuf_cache);
3745                 view->pixbuf_cache = NULL;
3746         }
3747
3748         if (view->goto_window) {
3749                 gtk_widget_destroy (view->goto_window);
3750                 view->goto_window = NULL;
3751                 view->goto_entry = NULL;
3752         }
3753
3754         if (view->selection_scroll_id) {
3755             g_source_remove (view->selection_scroll_id);
3756             view->selection_scroll_id = 0;
3757         }
3758
3759         if (view->selection_update_id) {
3760             g_source_remove (view->selection_update_id);
3761             view->selection_update_id = 0;
3762         }
3763
3764         if (view->loading_text) {
3765                 cairo_surface_destroy (view->loading_text);
3766                 view->loading_text = NULL;
3767         }
3768
3769         if (view->scroll_info.timeout_id) {
3770             g_source_remove (view->scroll_info.timeout_id);
3771             view->scroll_info.timeout_id = 0;
3772         }
3773
3774         if (view->drag_info.drag_timeout_id) {
3775                 g_source_remove (view->drag_info.drag_timeout_id);
3776                 view->drag_info.drag_timeout_id = 0;
3777         }
3778
3779         if (view->drag_info.release_timeout_id) {
3780                 g_source_remove (view->drag_info.release_timeout_id);
3781                 view->drag_info.release_timeout_id = 0;
3782         }
3783
3784         ev_view_presentation_transition_stop (view);
3785
3786         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
3787
3788         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
3789 }
3790
3791 static void
3792 ev_view_set_property (GObject      *object,
3793                       guint         prop_id,
3794                       const GValue *value,
3795                       GParamSpec   *pspec)
3796 {
3797         EvView *view = EV_VIEW (object);
3798
3799         switch (prop_id) {
3800                 case PROP_CONTINUOUS:
3801                         ev_view_set_continuous (view, g_value_get_boolean (value));
3802                         break;
3803                 case PROP_DUAL_PAGE:
3804                         ev_view_set_dual_page (view, g_value_get_boolean (value));
3805                         break;
3806                 case PROP_FULLSCREEN:
3807                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
3808                         break;
3809                 case PROP_PRESENTATION:
3810                         ev_view_set_presentation (view, g_value_get_boolean (value));
3811                         break;
3812                 case PROP_SIZING_MODE:
3813                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
3814                         break;
3815                 case PROP_ZOOM:
3816                         ev_view_set_zoom (view, g_value_get_double (value), FALSE);
3817                         break;
3818                 case PROP_ROTATION:
3819                         ev_view_set_rotation (view, g_value_get_int (value));
3820                         break;
3821                 default:
3822                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
3823         }
3824 }
3825
3826 static AtkObject *
3827 ev_view_get_accessible (GtkWidget *widget)
3828 {
3829         static gboolean first_time = TRUE;
3830
3831         if (first_time) {
3832                 AtkObjectFactory *factory;
3833                 AtkRegistry *registry;
3834                 GType derived_type;
3835                 GType derived_atk_type;
3836
3837                 /*
3838                  * Figure out whether accessibility is enabled by looking at the
3839                  * type of the accessible object which would be created for
3840                  * the parent type of EvView.
3841                  */
3842                 derived_type = g_type_parent (EV_TYPE_VIEW);
3843
3844                 registry = atk_get_default_registry ();
3845                 factory = atk_registry_get_factory (registry,
3846                                                     derived_type);
3847                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
3848                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
3849                         atk_registry_set_factory_type (registry,
3850                                                        EV_TYPE_VIEW,
3851                                                        ev_view_accessible_factory_get_type ());
3852                 first_time = FALSE;
3853         }
3854         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
3855 }
3856
3857 static void
3858 ev_view_get_property (GObject *object,
3859                       guint prop_id,
3860                       GValue *value,
3861                       GParamSpec *pspec)
3862 {
3863         EvView *view = EV_VIEW (object);
3864
3865         switch (prop_id) {
3866                 case PROP_CONTINUOUS:
3867                         g_value_set_boolean (value, view->continuous);
3868                         break;
3869                 case PROP_DUAL_PAGE:
3870                         g_value_set_boolean (value, view->dual_page);
3871                         break;
3872                 case PROP_FULLSCREEN:
3873                         g_value_set_boolean (value, view->fullscreen);
3874                         break;
3875                 case PROP_PRESENTATION:
3876                         g_value_set_boolean (value, view->presentation);
3877                         break;
3878                 case PROP_SIZING_MODE:
3879                         g_value_set_enum (value, view->sizing_mode);
3880                         break;
3881                 case PROP_ZOOM:
3882                         g_value_set_double (value, view->scale);
3883                         break;
3884                 case PROP_ROTATION:
3885                         g_value_set_int (value, view->rotation);
3886                         break;
3887                 case PROP_HAS_SELECTION:
3888                         g_value_set_boolean (value,
3889                                              view->selection_info.selections != NULL);
3890                         break;
3891                 default:
3892                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
3893         }
3894 }
3895
3896 static void
3897 ev_view_class_init (EvViewClass *class)
3898 {
3899         GObjectClass *object_class = G_OBJECT_CLASS (class);
3900         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
3901         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
3902         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
3903         GtkBindingSet *binding_set;
3904
3905         object_class->finalize = ev_view_finalize;
3906         object_class->set_property = ev_view_set_property;
3907         object_class->get_property = ev_view_get_property;
3908
3909         widget_class->expose_event = ev_view_expose_event;
3910         widget_class->button_press_event = ev_view_button_press_event;
3911         widget_class->motion_notify_event = ev_view_motion_notify_event;
3912         widget_class->button_release_event = ev_view_button_release_event;
3913         widget_class->key_press_event = ev_view_key_press_event;
3914         widget_class->focus_in_event = ev_view_focus_in;
3915         widget_class->focus_out_event = ev_view_focus_out;
3916         widget_class->get_accessible = ev_view_get_accessible;
3917         widget_class->size_request = ev_view_size_request;
3918         widget_class->size_allocate = ev_view_size_allocate;
3919         widget_class->realize = ev_view_realize;
3920         widget_class->scroll_event = ev_view_scroll_event;
3921         widget_class->enter_notify_event = ev_view_enter_notify_event;
3922         widget_class->leave_notify_event = ev_view_leave_notify_event;
3923         widget_class->style_set = ev_view_style_set;
3924         widget_class->drag_data_get = ev_view_drag_data_get;
3925         widget_class->drag_motion = ev_view_drag_motion;
3926         widget_class->popup_menu = ev_view_popup_menu;
3927         widget_class->query_tooltip = ev_view_query_tooltip;
3928
3929         gtk_object_class->destroy = ev_view_destroy;
3930
3931         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
3932
3933         class->binding_activated = ev_view_scroll;
3934
3935         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
3936                          G_TYPE_FROM_CLASS (object_class),
3937                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
3938                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
3939                          NULL, NULL,
3940                          ev_view_marshal_VOID__ENUM_BOOLEAN,
3941                          G_TYPE_NONE, 2,
3942                          GTK_TYPE_SCROLL_TYPE,
3943                          G_TYPE_BOOLEAN);
3944
3945         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
3946                          G_TYPE_FROM_CLASS (object_class),
3947                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
3948                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
3949                          NULL, NULL,
3950                          g_cclosure_marshal_VOID__VOID,
3951                          G_TYPE_NONE, 0, G_TYPE_NONE);
3952         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
3953                          G_TYPE_FROM_CLASS (object_class),
3954                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
3955                          G_STRUCT_OFFSET (EvViewClass, handle_link),
3956                          NULL, NULL,
3957                          g_cclosure_marshal_VOID__OBJECT,
3958                          G_TYPE_NONE, 1,
3959                          G_TYPE_OBJECT);
3960         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
3961                          G_TYPE_FROM_CLASS (object_class),
3962                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
3963                          G_STRUCT_OFFSET (EvViewClass, external_link),
3964                          NULL, NULL,
3965                          g_cclosure_marshal_VOID__OBJECT,
3966                          G_TYPE_NONE, 1,
3967                          G_TYPE_OBJECT);
3968         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
3969                          G_TYPE_FROM_CLASS (object_class),
3970                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
3971                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
3972                          NULL, NULL,
3973                          g_cclosure_marshal_VOID__OBJECT,
3974                          G_TYPE_NONE, 1,
3975                          G_TYPE_OBJECT);
3976
3977
3978         g_object_class_install_property (object_class,
3979                                          PROP_CONTINUOUS,
3980                                          g_param_spec_boolean ("continuous",
3981                                                                "Continuous",
3982                                                                "Continuous scrolling mode",
3983                                                                TRUE,
3984                                                                G_PARAM_READWRITE));
3985
3986         g_object_class_install_property (object_class,
3987                                          PROP_DUAL_PAGE,
3988                                          g_param_spec_boolean ("dual-page",
3989                                                                "Dual Page",
3990                                                                "Two pages visible at once",
3991                                                                FALSE,
3992                                                                G_PARAM_READWRITE));
3993         g_object_class_install_property (object_class,
3994                                          PROP_FULLSCREEN,
3995                                          g_param_spec_boolean ("fullscreen",
3996                                                                "Full Screen",
3997                                                                "Draw page in a fullscreen fashion",
3998                                                                FALSE,
3999                                                                G_PARAM_READWRITE));
4000         g_object_class_install_property (object_class,
4001                                          PROP_PRESENTATION,
4002                                          g_param_spec_boolean ("presentation",
4003                                                                "Presentation",
4004                                                                "Draw page in presentation mode",
4005                                                                TRUE,
4006                                                                G_PARAM_READWRITE));
4007
4008         g_object_class_install_property (object_class,
4009                                          PROP_SIZING_MODE,
4010                                          g_param_spec_enum ("sizing-mode",
4011                                                             "Sizing Mode",
4012                                                             "Sizing Mode",
4013                                                             EV_TYPE_SIZING_MODE,
4014                                                             EV_SIZING_FIT_WIDTH,
4015                                                             G_PARAM_READWRITE));
4016
4017         g_object_class_install_property (object_class,
4018                                          PROP_ZOOM,
4019                                          g_param_spec_double ("zoom",
4020                                                               "Zoom factor",
4021                                                               "Zoom factor",
4022                                                               0,
4023                                                               G_MAXDOUBLE,
4024                                                               1.0,
4025                                                               G_PARAM_READWRITE));
4026         g_object_class_install_property (object_class,
4027                                          PROP_ROTATION,
4028                                          g_param_spec_double ("rotation",
4029                                                               "Rotation",
4030                                                               "Rotation",
4031                                                               0,
4032                                                               360,
4033                                                               0,
4034                                                               G_PARAM_READWRITE));
4035         g_object_class_install_property (object_class,
4036                                          PROP_HAS_SELECTION,
4037                                          g_param_spec_boolean ("has-selection",
4038                                                                "Has selection",
4039                                                                "The view has selections",
4040                                                                FALSE,
4041                                                                G_PARAM_READABLE));
4042
4043         binding_set = gtk_binding_set_by_class (class);
4044
4045         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4046         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4047         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4048         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4049         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4050         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4051         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4052         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4053         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4054                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4055         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4056                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4057         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4058                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4059         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4060                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4061
4062 }
4063
4064 static void
4065 ev_view_init (EvView *view)
4066 {
4067         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4068
4069         view->spacing = 5;
4070         view->scale = 1.0;
4071         view->current_page = 0;
4072         view->pressed_button = -1;
4073         view->cursor = EV_VIEW_CURSOR_NORMAL;
4074         view->drag_info.in_drag = FALSE;
4075         view->scroll_info.autoscrolling = FALSE;
4076         view->selection_info.selections = NULL;
4077         view->selection_info.in_selection = FALSE;
4078         view->selection_info.in_drag = FALSE;
4079         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4080         view->continuous = TRUE;
4081         view->dual_page = FALSE;
4082         view->presentation = FALSE;
4083         view->presentation_state = EV_PRESENTATION_NORMAL;
4084         view->fullscreen = FALSE;
4085         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4086         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4087         view->jump_to_find_result = TRUE;
4088         view->highlight_find_results = FALSE;
4089
4090         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4091         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4092 }
4093
4094 /*** Callbacks ***/
4095
4096 static void
4097 ev_view_change_page (EvView *view,
4098                      gint    new_page,
4099                      gboolean start_transition)
4100 {
4101         gint x, y;
4102
4103         view->current_page = new_page;
4104         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4105
4106         if (view->presentation && start_transition)
4107                 ev_view_presentation_transition_start (view);
4108
4109         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4110         ev_view_handle_cursor_over_xy (view, x, y);
4111
4112         gtk_widget_queue_resize (GTK_WIDGET (view));
4113 }
4114
4115 static void
4116 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4117                                      EvView                *view)
4118 {
4119         g_object_unref (view->animation);
4120         view->animation = NULL;
4121         ev_view_change_page (view, view->current_page, TRUE);
4122 }
4123
4124 /**
4125  * ev_view_transition_animation_cancel:
4126  * @animation: Animation to finish
4127  * @view: An EvView
4128  *
4129  * Does almost the same as cancel, but without scheduling the transition.
4130  */
4131
4132 static void
4133 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4134                                      EvView                *view)
4135 {
4136         g_object_unref (view->animation);
4137         view->animation = NULL;
4138         ev_view_change_page (view, view->current_page, FALSE);
4139 }
4140
4141 static void
4142 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4143                                     gdouble                progress,
4144                                     EvView                *view)
4145 {
4146         gtk_widget_queue_draw (GTK_WIDGET (view));
4147 }
4148
4149 static void
4150 ev_view_presentation_animation_start (EvView *view,
4151                                       int     new_page)
4152 {
4153         EvTransitionEffect *effect = NULL;
4154         cairo_surface_t *surface;
4155
4156         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4157                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4158                                                             view->current_page);
4159         if (!effect)
4160                 return;
4161
4162         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4163         view->animation = ev_transition_animation_new (effect);
4164         ev_transition_animation_set_origin_surface (view->animation, surface);
4165
4166         g_signal_connect (view->animation, "frame",
4167                           G_CALLBACK (ev_view_transition_animation_frame), view);
4168         g_signal_connect (view->animation, "finished",
4169                           G_CALLBACK (ev_view_transition_animation_finish), view);
4170 }
4171
4172 static void
4173 job_finished_cb (EvPixbufCache *pixbuf_cache,
4174                  GdkRegion     *region,
4175                  EvView        *view)
4176 {
4177         if (view->animation) {
4178                 cairo_surface_t *surface;
4179
4180                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4181                 ev_transition_animation_set_dest_surface (view->animation, surface);
4182         }
4183
4184         if (region) {
4185                 gdk_window_invalidate_region (view->layout.bin_window,
4186                                               region, TRUE);
4187         } else {
4188                 gtk_widget_queue_draw (GTK_WIDGET (view));
4189         }
4190 }
4191
4192 static void
4193 page_changed_cb (EvPageCache *page_cache,
4194                  int          new_page,
4195                  EvView      *view)
4196 {
4197         if (view->current_page != new_page) {
4198                 if (view->presentation)
4199                         ev_view_presentation_animation_start (view, new_page);
4200
4201                 ev_view_change_page (view, new_page, TRUE);
4202         } else {
4203                 gtk_widget_queue_draw (GTK_WIDGET (view));
4204         }
4205
4206         view->find_result = 0;
4207 }
4208
4209 static void
4210 on_adjustment_value_changed (GtkAdjustment *adjustment,
4211                              EvView        *view)
4212 {
4213         int dx = 0, dy = 0;
4214         gint x, y;
4215         GList *children, *l;
4216
4217         if (! GTK_WIDGET_REALIZED (view))
4218                 return;
4219
4220         if (view->hadjustment) {
4221                 dx = view->scroll_x - (int) view->hadjustment->value;
4222                 view->scroll_x = (int) view->hadjustment->value;
4223         } else {
4224                 view->scroll_x = 0;
4225         }
4226
4227         if (view->vadjustment) {
4228                 dy = view->scroll_y - (int) view->vadjustment->value;
4229                 view->scroll_y = (int) view->vadjustment->value;
4230         } else {
4231                 view->scroll_y = 0;
4232         }
4233
4234         children = gtk_container_get_children (GTK_CONTAINER (view));
4235         for (l = children; l && l->data; l = g_list_next (l)) {
4236                 gint       child_x, child_y;
4237                 GtkWidget *child = (GtkWidget *)l->data;
4238
4239                 gtk_container_child_get (GTK_CONTAINER (view),
4240                                          child,
4241                                          "x", &child_x,
4242                                          "y", &child_y,
4243                                          NULL);
4244                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4245         }
4246         g_list_free (children);
4247
4248         if (view->pending_resize)
4249                 gtk_widget_queue_draw (GTK_WIDGET (view));
4250         else
4251                 gdk_window_scroll (view->layout.bin_window, dx, dy);
4252
4253         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4254         ev_view_handle_cursor_over_xy (view, x, y);
4255
4256         if (view->document)
4257                 view_update_range_and_current_page (view);
4258 }
4259
4260 GtkWidget*
4261 ev_view_new (void)
4262 {
4263         GtkWidget *view;
4264
4265         view = g_object_new (EV_TYPE_VIEW, NULL);
4266
4267         return view;
4268 }
4269
4270 static void
4271 setup_caches (EvView *view)
4272 {
4273         view->page_cache = ev_page_cache_get (view->document);
4274         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
4275         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
4276         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4277         page_changed_cb (view->page_cache,
4278                          ev_page_cache_get_current_page (view->page_cache),
4279                          view);
4280 }
4281
4282 static void
4283 clear_caches (EvView *view)
4284 {
4285         if (view->pixbuf_cache) {
4286                 g_object_unref (view->pixbuf_cache);
4287                 view->pixbuf_cache = NULL;
4288         }
4289
4290         if (view->page_cache) {
4291                 view->page_cache = NULL;
4292         }
4293 }
4294
4295 void
4296 ev_view_set_loading (EvView       *view,
4297                      gboolean      loading)
4298 {
4299         view->loading = loading;
4300         gtk_widget_queue_draw (GTK_WIDGET (view));
4301 }
4302
4303 static gboolean
4304 ev_view_autoscroll_cb (EvView *view)
4305 {
4306         gdouble speed, value;
4307
4308         /* If the user stops autoscrolling, autoscrolling will be
4309          * set to false but the timeout will continue; stop the timeout: */
4310         if (!view->scroll_info.autoscrolling) {
4311                 view->scroll_info.timeout_id = 0;
4312                 return FALSE;
4313         }
4314
4315         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4316                 (view->scroll_info.last_y < view->scroll_info.start_y))
4317                 return TRUE;
4318
4319         /* Replace 100 with your speed of choice: The lower the faster.
4320          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4321          *      based on the distance of the starting point from the mouse
4322          * (All also effected by the timeout interval of this callback) */
4323
4324         if (view->scroll_info.start_y > view->scroll_info.last_y)
4325                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
4326         else
4327                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
4328
4329         value = gtk_adjustment_get_value (view->vadjustment);
4330         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
4331         gtk_adjustment_set_value (view->vadjustment, value);
4332
4333         return TRUE;
4334
4335 }
4336
4337 void
4338 ev_view_autoscroll_start (EvView *view)
4339 {
4340         gint x, y;
4341
4342         g_return_if_fail (EV_IS_VIEW (view));
4343
4344         if (view->scroll_info.autoscrolling)
4345                 return;
4346
4347         view->scroll_info.autoscrolling = TRUE;
4348         view->scroll_info.timeout_id =
4349                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
4350                                view);
4351
4352         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4353         ev_view_handle_cursor_over_xy (view, x, y);
4354 }
4355
4356 void
4357 ev_view_autoscroll_stop (EvView *view)
4358 {
4359         gint x, y;
4360
4361         g_return_if_fail (EV_IS_VIEW (view));
4362
4363         if (!view->scroll_info.autoscrolling)
4364                 return;
4365
4366         view->scroll_info.autoscrolling = FALSE;
4367         if (view->scroll_info.timeout_id) {
4368                 g_source_remove (view->scroll_info.timeout_id);
4369                 view->scroll_info.timeout_id = 0;
4370         }
4371
4372         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4373         ev_view_handle_cursor_over_xy (view, x, y);
4374 }
4375
4376 void
4377 ev_view_set_document (EvView     *view,
4378                       EvDocument *document)
4379 {
4380         g_return_if_fail (EV_IS_VIEW (view));
4381
4382         view->loading = FALSE;
4383
4384         if (document != view->document) {
4385                 clear_caches (view);
4386
4387                 if (view->document) {
4388                         g_object_unref (view->document);
4389                         view->page_cache = NULL;
4390                 }
4391
4392                 view->document = document;
4393                 view->find_result = 0;
4394
4395                 if (view->document) {
4396                         g_object_ref (view->document);
4397                         setup_caches (view);
4398                 }
4399
4400                 gtk_widget_queue_resize (GTK_WIDGET (view));
4401         }
4402 }
4403
4404 static void
4405 ev_view_reload_page (EvView    *view,
4406                      gint       page,
4407                      GdkRegion *region)
4408 {
4409         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
4410                                      region,
4411                                      page,
4412                                      view->rotation,
4413                                      view->scale);
4414 }
4415
4416 void
4417 ev_view_reload (EvView *view)
4418 {
4419         ev_pixbuf_cache_clear (view->pixbuf_cache);
4420         view_update_range_and_current_page (view);
4421 }
4422
4423 /*** Zoom and sizing mode ***/
4424
4425 #define EPSILON 0.0000001
4426 void
4427 ev_view_set_zoom (EvView   *view,
4428                   double    factor,
4429                   gboolean  relative)
4430 {
4431         double scale;
4432
4433         if (relative)
4434                 scale = view->scale * factor;
4435         else
4436                 scale = factor;
4437
4438         scale = CLAMP (scale,
4439                        view->sizing_mode == EV_SIZING_FREE ? view->min_scale : 0,
4440                        view->max_scale);
4441
4442         if (ABS (view->scale - scale) < EPSILON)
4443                 return;
4444
4445         if (view->loading_text) {
4446                 cairo_surface_destroy (view->loading_text);
4447                 view->loading_text = NULL;
4448         }
4449
4450         view->scale = scale;
4451         view->pending_resize = TRUE;
4452
4453         gtk_widget_queue_resize (GTK_WIDGET (view));
4454
4455         g_object_notify (G_OBJECT (view), "zoom");
4456 }
4457
4458 double
4459 ev_view_get_zoom (EvView *view)
4460 {
4461         return view->scale;
4462 }
4463
4464 void
4465 ev_view_set_screen_dpi (EvView  *view,
4466                         gdouble  dpi)
4467 {
4468         g_return_if_fail (EV_IS_VIEW (view));
4469         g_return_if_fail (dpi > 0);
4470
4471         view->dpi = dpi;
4472         view->min_scale = MIN_SCALE * dpi / 72.0;
4473         view->max_scale = MAX_SCALE * dpi / 72.0;
4474 }
4475
4476 gboolean
4477 ev_view_get_continuous (EvView *view)
4478 {
4479         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4480
4481         return view->continuous;
4482 }
4483
4484 void
4485 ev_view_set_continuous (EvView   *view,
4486                         gboolean  continuous)
4487 {
4488         g_return_if_fail (EV_IS_VIEW (view));
4489
4490         continuous = continuous != FALSE;
4491
4492         if (view->continuous != continuous) {
4493                 view->continuous = continuous;
4494                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4495                 gtk_widget_queue_resize (GTK_WIDGET (view));
4496         }
4497
4498         g_object_notify (G_OBJECT (view), "continuous");
4499 }
4500
4501 gboolean
4502 ev_view_get_dual_page (EvView *view)
4503 {
4504         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4505
4506         return view->dual_page;
4507 }
4508
4509 void
4510 ev_view_set_dual_page (EvView   *view,
4511                        gboolean  dual_page)
4512 {
4513         g_return_if_fail (EV_IS_VIEW (view));
4514
4515         dual_page = dual_page != FALSE;
4516
4517         if (view->dual_page == dual_page)
4518                 return;
4519
4520         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4521         view->dual_page = dual_page;
4522         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
4523          * preload_cache_size to be 2 if dual_page is set.
4524          */
4525         gtk_widget_queue_resize (GTK_WIDGET (view));
4526
4527         g_object_notify (G_OBJECT (view), "dual-page");
4528 }
4529
4530 void
4531 ev_view_set_fullscreen (EvView   *view,
4532                          gboolean  fullscreen)
4533 {
4534         g_return_if_fail (EV_IS_VIEW (view));
4535
4536         fullscreen = fullscreen != FALSE;
4537
4538         if (view->fullscreen == fullscreen)
4539                 return;
4540
4541         view->fullscreen = fullscreen;
4542         gtk_widget_queue_resize (GTK_WIDGET (view));
4543
4544         g_object_notify (G_OBJECT (view), "fullscreen");
4545 }
4546
4547 gboolean
4548 ev_view_get_fullscreen (EvView *view)
4549 {
4550         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4551
4552         return view->fullscreen;
4553 }
4554
4555 void
4556 ev_view_set_presentation (EvView   *view,
4557                           gboolean  presentation)
4558 {
4559         g_return_if_fail (EV_IS_VIEW (view));
4560
4561         presentation = presentation != FALSE;
4562
4563         if (view->presentation == presentation)
4564                 return;
4565
4566         if (!presentation)
4567                 view->presentation_state = EV_PRESENTATION_NORMAL;
4568
4569         view->presentation = presentation;
4570         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4571
4572         if (presentation) {
4573                 view->sizing_mode_saved = view->sizing_mode;
4574                 view->scale_saved = view->scale;
4575                 ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
4576         } else {
4577                 ev_view_set_sizing_mode (view, view->sizing_mode_saved);
4578                 ev_view_set_zoom (view, view->scale_saved, FALSE);
4579         }
4580
4581         gtk_widget_queue_resize (GTK_WIDGET (view));
4582
4583         if (presentation)
4584                 ev_view_presentation_transition_start (view);
4585         else {
4586                 ev_view_presentation_transition_stop (view);
4587
4588                 if (view->animation) {
4589                         /* stop any running animation */
4590                         ev_view_transition_animation_cancel (view->animation, view);
4591                 }
4592         }
4593
4594         if (GTK_WIDGET_REALIZED (view)) {
4595                 if (view->presentation)
4596                         gdk_window_set_background (view->layout.bin_window,
4597                                                    &GTK_WIDGET (view)->style->black);
4598                 else
4599                         gdk_window_set_background (view->layout.bin_window,
4600                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
4601         }
4602
4603         g_object_notify (G_OBJECT (view), "presentation");
4604 }
4605
4606 gboolean
4607 ev_view_get_presentation (EvView *view)
4608 {
4609         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
4610
4611         return view->presentation;
4612 }
4613
4614 static gboolean
4615 transition_next_page (EvView *view)
4616 {
4617         ev_view_next_page (view);
4618
4619         return FALSE;
4620 }
4621
4622 static void
4623 ev_view_presentation_transition_stop (EvView *view)
4624 {
4625         if (view->trans_timeout_id > 0)
4626                 g_source_remove (view->trans_timeout_id);
4627         view->trans_timeout_id = 0;
4628 }
4629
4630 static void
4631 ev_view_presentation_transition_start (EvView *view)
4632 {
4633         gdouble duration;
4634
4635         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
4636                 return;
4637
4638         ev_view_presentation_transition_stop (view);
4639
4640         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
4641                                                              view->current_page);
4642         if (duration > 0) {
4643                 view->trans_timeout_id =
4644                         g_timeout_add_seconds (duration,
4645                                                (GSourceFunc) transition_next_page,
4646                                                view);
4647         }
4648 }
4649
4650 void
4651 ev_view_set_sizing_mode (EvView       *view,
4652                          EvSizingMode  sizing_mode)
4653 {
4654         g_return_if_fail (EV_IS_VIEW (view));
4655
4656         if (view->sizing_mode == sizing_mode)
4657                 return;
4658
4659         view->sizing_mode = sizing_mode;
4660         gtk_widget_queue_resize (GTK_WIDGET (view));
4661
4662         g_object_notify (G_OBJECT (view), "sizing-mode");
4663 }
4664
4665 EvSizingMode
4666 ev_view_get_sizing_mode (EvView *view)
4667 {
4668         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
4669
4670         return view->sizing_mode;
4671 }
4672
4673 gboolean
4674 ev_view_can_zoom_in (EvView *view)
4675 {
4676         return view->scale * ZOOM_IN_FACTOR <= view->max_scale;
4677 }
4678
4679 gboolean
4680 ev_view_can_zoom_out (EvView *view)
4681 {
4682         return view->scale * ZOOM_OUT_FACTOR >= view->min_scale;
4683 }
4684
4685 void
4686 ev_view_zoom_in (EvView *view)
4687 {
4688         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
4689
4690         if (view->presentation)
4691                 return;
4692
4693         view->pending_scroll = SCROLL_TO_CENTER;
4694         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
4695 }
4696
4697 void
4698 ev_view_zoom_out (EvView *view)
4699 {
4700         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
4701
4702         if (view->presentation)
4703                 return;
4704
4705         view->pending_scroll = SCROLL_TO_CENTER;
4706         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
4707 }
4708
4709 void
4710 ev_view_rotate_right (EvView *view)
4711 {
4712         int rotation = view->rotation + 90;
4713
4714         if (rotation >= 360) {
4715                 rotation -= 360;
4716         }
4717
4718         ev_view_set_rotation (view, rotation);
4719 }
4720
4721 void
4722 ev_view_rotate_left (EvView *view)
4723 {
4724         int rotation = view->rotation - 90;
4725
4726         if (rotation < 0) {
4727                 rotation += 360;
4728         }
4729
4730         ev_view_set_rotation (view, rotation);
4731 }
4732
4733 void
4734 ev_view_set_rotation (EvView *view, int rotation)
4735 {
4736         view->rotation = rotation;
4737
4738         if (view->pixbuf_cache) {
4739                 ev_pixbuf_cache_clear (view->pixbuf_cache);
4740                 gtk_widget_queue_resize (GTK_WIDGET (view));
4741         }
4742
4743         if (rotation != 0)
4744                 clear_selection (view);
4745
4746         g_object_notify (G_OBJECT (view), "rotation");
4747 }
4748
4749 int
4750 ev_view_get_rotation (EvView *view)
4751 {
4752         return view->rotation;
4753 }
4754
4755 static double
4756 zoom_for_size_fit_width (int doc_width,
4757                          int doc_height,
4758                          int target_width,
4759                          int target_height,
4760                          int vsb_width)
4761 {
4762         double scale;
4763
4764         scale = (double)target_width / doc_width;
4765
4766         if (doc_height * scale > target_height)
4767                 scale = (double) (target_width - vsb_width) / doc_width;
4768
4769         return scale;
4770 }
4771
4772 static double
4773 zoom_for_size_fit_height (int doc_width,
4774                           int doc_height,
4775                           int target_width,
4776                           int target_height,
4777                           int vsb_height)
4778 {
4779         double scale;
4780
4781         scale = (double)target_height / doc_height;
4782
4783         if (doc_width * scale > target_width)
4784                 scale = (double) (target_height - vsb_height) / doc_height;
4785
4786         return scale;
4787 }
4788
4789 static double
4790 zoom_for_size_best_fit (int doc_width,
4791                         int doc_height,
4792                         int target_width,
4793                         int target_height,
4794                         int vsb_width,
4795                         int hsb_width)
4796 {
4797         double w_scale;
4798         double h_scale;
4799
4800         w_scale = (double)target_width / doc_width;
4801         h_scale = (double)target_height / doc_height;
4802
4803         if (doc_height * w_scale > target_height)
4804                 w_scale = (double) (target_width - vsb_width) / doc_width;
4805         if (doc_width * h_scale > target_width)
4806                 h_scale = (double) (target_height - hsb_width) / doc_height;
4807
4808         return MIN (w_scale, h_scale);
4809 }
4810
4811
4812 static void
4813 ev_view_zoom_for_size_presentation (EvView *view,
4814                                     int     width,
4815                                     int     height)
4816 {
4817         int doc_width, doc_height;
4818         gdouble scale;
4819
4820         ev_page_cache_get_size (view->page_cache,
4821                                 view->current_page,
4822                                 view->rotation,
4823                                 1.0,
4824                                 &doc_width,
4825                                 &doc_height);
4826         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
4827         ev_view_set_zoom (view, scale, FALSE);
4828 }
4829
4830 static void
4831 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
4832                            int     width,
4833                            int     height,
4834                            int     vsb_width,
4835                            int     hsb_height)
4836 {
4837         int doc_width, doc_height;
4838         GtkBorder border;
4839         gdouble scale;
4840
4841         ev_page_cache_get_max_width (view->page_cache,
4842                                      view->rotation,
4843                                      1.0,
4844                                      &doc_width);
4845         ev_page_cache_get_max_height (view->page_cache,
4846                                       view->rotation,
4847                                       1.0,
4848                                       &doc_height);
4849         compute_border (view, doc_width, doc_height, &border);
4850
4851         doc_width = doc_width * 2;
4852         width -= (2 * (border.left + border.right) + 3 * view->spacing);
4853         height -= (border.top + border.bottom + 2 * view->spacing - 1);
4854
4855         /* FIXME: We really need to calculate the overall height here, not the
4856          * page height.  We assume there's always a vertical scrollbar for
4857          * now.  We need to fix this. */
4858         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4859                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
4860         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4861                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
4862         else
4863                 g_assert_not_reached ();
4864
4865         ev_view_set_zoom (view, scale, FALSE);
4866 }
4867
4868 static void
4869 ev_view_zoom_for_size_continuous (EvView *view,
4870                                   int     width,
4871                                   int     height,
4872                                   int     vsb_width,
4873                                   int     hsb_height)
4874 {
4875         int doc_width, doc_height;
4876         GtkBorder border;
4877         gdouble scale;
4878
4879         ev_page_cache_get_max_width (view->page_cache,
4880                                      view->rotation,
4881                                      1.0,
4882                                      &doc_width);
4883         ev_page_cache_get_max_height (view->page_cache,
4884                                       view->rotation,
4885                                       1.0,
4886                                       &doc_height);
4887         compute_border (view, doc_width, doc_height, &border);
4888
4889         width -= (border.left + border.right + 2 * view->spacing);
4890         height -= (border.top + border.bottom + 2 * view->spacing - 1);
4891
4892         /* FIXME: We really need to calculate the overall height here, not the
4893          * page height.  We assume there's always a vertical scrollbar for
4894          * now.  We need to fix this. */
4895         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4896                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
4897         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4898                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
4899         else
4900                 g_assert_not_reached ();
4901
4902         ev_view_set_zoom (view, scale, FALSE);
4903 }
4904
4905 static void
4906 ev_view_zoom_for_size_dual_page (EvView *view,
4907                                  int     width,
4908                                  int     height,
4909                                  int     vsb_width,
4910                                  int     hsb_height)
4911 {
4912         GtkBorder border;
4913         gint doc_width, doc_height;
4914         gdouble scale;
4915         gint other_page;
4916
4917         other_page = view->current_page ^ 1;
4918
4919         /* Find the largest of the two. */
4920         ev_page_cache_get_size (view->page_cache,
4921                                 view->current_page,
4922                                 view->rotation,
4923                                 1.0,
4924                                 &doc_width, &doc_height);
4925
4926         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
4927                 gint width_2, height_2;
4928                 ev_page_cache_get_size (view->page_cache,
4929                                         other_page,
4930                                         view->rotation,
4931                                         1.0,
4932                                         &width_2, &height_2);
4933                 if (width_2 > doc_width)
4934                         doc_width = width_2;
4935                 if (height_2 > doc_height)
4936                         doc_height = height_2;
4937         }
4938         compute_border (view, doc_width, doc_height, &border);
4939
4940         doc_width = doc_width * 2;
4941         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
4942         height -= (border.top + border.bottom + 2 * view->spacing);
4943
4944         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4945                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
4946         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4947                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
4948         else
4949                 g_assert_not_reached ();
4950
4951         ev_view_set_zoom (view, scale, FALSE);
4952 }
4953
4954 static void
4955 ev_view_zoom_for_size_single_page (EvView *view,
4956                                    int     width,
4957                                    int     height,
4958                                    int     vsb_width,
4959                                    int     hsb_height)
4960 {
4961         int doc_width, doc_height;
4962         GtkBorder border;
4963         gdouble scale;
4964
4965         ev_page_cache_get_size (view->page_cache,
4966                                 view->current_page,
4967                                 view->rotation,
4968                                 1.0,
4969                                 &doc_width,
4970                                 &doc_height);
4971         /* Get an approximate border */
4972         compute_border (view, width, height, &border);
4973
4974         width -= (border.left + border.right + 2 * view->spacing);
4975         height -= (border.top + border.bottom + 2 * view->spacing);
4976
4977         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
4978                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
4979         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4980                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
4981         else
4982                 g_assert_not_reached ();
4983
4984         ev_view_set_zoom (view, scale, FALSE);
4985 }
4986
4987 void
4988 ev_view_set_zoom_for_size (EvView *view,
4989                            int     width,
4990                            int     height,
4991                            int     vsb_width,
4992                            int     hsb_height)
4993 {
4994         g_return_if_fail (EV_IS_VIEW (view));
4995         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
4996                           view->sizing_mode == EV_SIZING_BEST_FIT);
4997         g_return_if_fail (width >= 0);
4998         g_return_if_fail (height >= 0);
4999
5000         if (view->document == NULL)
5001                 return;
5002
5003         if (view->presentation)
5004                 ev_view_zoom_for_size_presentation (view, width, height);
5005         else if (view->continuous && view->dual_page)
5006                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
5007         else if (view->continuous)
5008                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
5009         else if (view->dual_page)
5010                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
5011         else
5012                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
5013 }
5014
5015 /*** Find ***/
5016 static gint
5017 ev_view_find_get_n_results (EvView *view, gint page)
5018 {
5019         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5020 }
5021
5022 static EvRectangle *
5023 ev_view_find_get_result (EvView *view, gint page, gint result)
5024 {
5025         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5026 }
5027
5028 static void
5029 jump_to_find_result (EvView *view)
5030 {
5031         gint n_results;
5032         gint page = view->current_page;
5033
5034         n_results = ev_view_find_get_n_results (view, page);
5035
5036         if (n_results > 0 && view->find_result < n_results) {
5037                 EvRectangle *rect;
5038                 GdkRectangle view_rect;
5039
5040                 rect = ev_view_find_get_result (view, page, view->find_result);
5041                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5042                 ensure_rectangle_is_visible (view, &view_rect);
5043                 view->jump_to_find_result = FALSE;
5044         }
5045 }
5046
5047 /**
5048  * jump_to_find_page
5049  * @view: #EvView instance
5050  * @direction: Direction to look
5051  * @shift: Shift from current page
5052  *
5053  * Jumps to the first page that has occurences of searched word.
5054  * Uses a direction where to look and a shift from current page.
5055  *
5056  */
5057 static void
5058 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5059 {
5060         int n_pages, i;
5061
5062         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5063
5064         for (i = 0; i < n_pages; i++) {
5065                 int page;
5066
5067                 if (direction == EV_VIEW_FIND_NEXT)
5068                         page = view->current_page + i;
5069                 else
5070                         page = view->current_page - i;
5071                 page += shift;
5072
5073                 if (page >= n_pages) {
5074                         page = page - n_pages;
5075                 } else if (page < 0)
5076                         page = page + n_pages;
5077
5078                 if (ev_view_find_get_n_results (view, page) > 0) {
5079                         ev_page_cache_set_current_page (view->page_cache, page);
5080                         break;
5081                 }
5082         }
5083 }
5084
5085 void
5086 ev_view_find_changed (EvView *view, GList **results, gint page)
5087 {
5088         view->find_pages = results;
5089
5090         if (view->jump_to_find_result == TRUE) {
5091                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5092                 jump_to_find_result (view);
5093         }
5094
5095         if (view->current_page == page)
5096                 gtk_widget_queue_draw (GTK_WIDGET (view));
5097 }
5098
5099 void
5100 ev_view_find_next (EvView *view)
5101 {
5102         gint n_results;
5103
5104         n_results = ev_view_find_get_n_results (view, view->current_page);
5105         view->find_result++;
5106
5107         if (view->find_result >= n_results) {
5108                 view->find_result = 0;
5109                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5110                 jump_to_find_result (view);
5111         } else {
5112                 jump_to_find_result (view);
5113                 gtk_widget_queue_draw (GTK_WIDGET (view));
5114         }
5115 }
5116
5117 void
5118 ev_view_find_previous (EvView *view)
5119 {
5120         view->find_result--;
5121
5122         if (view->find_result < 0) {
5123                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5124                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5125                 jump_to_find_result (view);
5126         } else {
5127                 jump_to_find_result (view);
5128                 gtk_widget_queue_draw (GTK_WIDGET (view));
5129         }
5130 }
5131
5132 void
5133 ev_view_find_search_changed (EvView *view)
5134 {
5135         /* search string has changed, focus on new search result */
5136         view->jump_to_find_result = TRUE;
5137         view->find_pages = NULL;
5138 }
5139
5140 void
5141 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5142 {
5143         view->highlight_find_results = value;
5144         gtk_widget_queue_draw (GTK_WIDGET (view));
5145 }
5146
5147 void
5148 ev_view_find_cancel (EvView *view)
5149 {
5150         view->find_pages = NULL;
5151 }
5152
5153 /*** Selections ***/
5154
5155 /* compute_new_selection_rect/text calculates the area currently selected by
5156  * view_rect.  each handles a different mode;
5157  */
5158 static GList *
5159 compute_new_selection_rect (EvView       *view,
5160                             GdkPoint     *start,
5161                             GdkPoint     *stop)
5162 {
5163         GdkRectangle view_rect;
5164         int n_pages, i;
5165         GList *list = NULL;
5166
5167         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5168
5169         view_rect.x = MIN (start->x, stop->x);
5170         view_rect.y = MIN (start->y, stop->y);
5171         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5172         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5173
5174         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5175
5176         for (i = 0; i < n_pages; i++) {
5177                 GdkRectangle page_area;
5178                 GtkBorder border;
5179
5180                 if (get_page_extents (view, i, &page_area, &border)) {
5181                         GdkRectangle overlap;
5182
5183                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5184                                 EvViewSelection *selection;
5185
5186                                 selection = g_new0 (EvViewSelection, 1);
5187                                 selection->page = i;
5188                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5189                                                        &(selection->rect));
5190
5191                                 list = g_list_append (list, selection);
5192                         }
5193                 }
5194         }
5195
5196         return list;
5197 }
5198
5199 static gboolean
5200 gdk_rectangle_point_in (GdkRectangle *rectangle,
5201                         GdkPoint     *point)
5202 {
5203         return rectangle->x <= point->x &&
5204                 rectangle->y <= point->y &&
5205                 point->x < rectangle->x + rectangle->width &&
5206                 point->y < rectangle->y + rectangle->height;
5207 }
5208
5209 static GList *
5210 compute_new_selection_text (EvView          *view,
5211                             EvSelectionStyle style,
5212                             GdkPoint        *start,
5213                             GdkPoint        *stop)
5214 {
5215         int n_pages, i, first, last;
5216         GList *list = NULL;
5217         EvViewSelection *selection;
5218         gint width, height;
5219         int start_page, end_page;
5220
5221         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5222
5223         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5224
5225         /* First figure out the range of pages the selection
5226          * affects. */
5227         first = n_pages;
5228         last = 0;
5229         if (view->continuous) {
5230                 start_page = 0;
5231                 end_page = n_pages;
5232         } else if (view->dual_page) {
5233                 start_page = view->start_page;
5234                 end_page = view->end_page + 1;
5235         } else {
5236                 start_page = view->current_page;
5237                 end_page = view->current_page + 1;
5238         }
5239
5240         for (i = start_page; i < end_page; i++) {
5241                 GdkRectangle page_area;
5242                 GtkBorder border;
5243
5244                 get_page_extents (view, i, &page_area, &border);
5245                 if (gdk_rectangle_point_in (&page_area, start) ||
5246                     gdk_rectangle_point_in (&page_area, stop)) {
5247                         if (first == n_pages)
5248                                 first = i;
5249                         last = i;
5250                 }
5251
5252         }
5253
5254         /* Now create a list of EvViewSelection's for the affected
5255          * pages.  This could be an empty list, a list of just one
5256          * page or a number of pages.*/
5257         for (i = first; i < last + 1; i++) {
5258                 GdkRectangle page_area;
5259                 GtkBorder border;
5260                 GdkPoint *point;
5261
5262                 ev_page_cache_get_size (view->page_cache, i,
5263                                         view->rotation,
5264                                         1.0, &width, &height);
5265
5266                 selection = g_new0 (EvViewSelection, 1);
5267                 selection->page = i;
5268                 selection->style = style;
5269                 selection->rect.x1 = selection->rect.y1 = 0;
5270                 selection->rect.x2 = width;
5271                 selection->rect.y2 = height;
5272
5273                 get_page_extents (view, i, &page_area, &border);
5274
5275                 if (gdk_rectangle_point_in (&page_area, start))
5276                         point = start;
5277                 else
5278                         point = stop;
5279
5280                 if (i == first)
5281                         view_point_to_doc_point (view, point, &page_area,
5282                                                  &selection->rect.x1,
5283                                                  &selection->rect.y1);
5284
5285                 /* If the selection is contained within just one page,
5286                  * make sure we don't write 'start' into both points
5287                  * in selection->rect. */
5288                 if (first == last)
5289                         point = stop;
5290
5291                 if (i == last)
5292                         view_point_to_doc_point (view, point, &page_area,
5293                                                  &selection->rect.x2,
5294                                                  &selection->rect.y2);
5295
5296                 list = g_list_append (list, selection);
5297         }
5298
5299         return list;
5300 }
5301
5302 /* This function takes the newly calculated list, and figures out which regions
5303  * have changed.  It then queues a redraw approporiately.
5304  */
5305 static void
5306 merge_selection_region (EvView *view,
5307                         GList  *new_list)
5308 {
5309         GList *old_list;
5310         GList *new_list_ptr, *old_list_ptr;
5311
5312         /* Update the selection */
5313         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5314         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5315         g_list_free (view->selection_info.selections);
5316         view->selection_info.selections = new_list;
5317         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5318         g_object_notify (G_OBJECT (view), "has-selection");
5319
5320         new_list_ptr = new_list;
5321         old_list_ptr = old_list;
5322
5323         while (new_list_ptr || old_list_ptr) {
5324                 EvViewSelection *old_sel, *new_sel;
5325                 int cur_page;
5326                 GdkRegion *region = NULL;
5327
5328                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5329                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5330
5331                 /* Assume that the lists are in order, and we run through them
5332                  * comparing them, one page at a time.  We come out with the
5333                  * first page we see. */
5334                 if (new_sel && old_sel) {
5335                         if (new_sel->page < old_sel->page) {
5336                                 new_list_ptr = new_list_ptr->next;
5337                                 old_sel = NULL;
5338                         } else if (new_sel->page > old_sel->page) {
5339                                 old_list_ptr = old_list_ptr->next;
5340                                 new_sel = NULL;
5341                         } else {
5342                                 new_list_ptr = new_list_ptr->next;
5343                                 old_list_ptr = old_list_ptr->next;
5344                         }
5345                 } else if (new_sel) {
5346                         new_list_ptr = new_list_ptr->next;
5347                 } else if (old_sel) {
5348                         old_list_ptr = old_list_ptr->next;
5349                 }
5350
5351                 g_assert (new_sel || old_sel);
5352
5353                 /* is the page we're looking at on the screen?*/
5354                 cur_page = new_sel ? new_sel->page : old_sel->page;
5355                 if (cur_page < view->start_page || cur_page > view->end_page)
5356                         continue;
5357
5358                 /* seed the cache with a new page.  We are going to need the new
5359                  * region too. */
5360                 if (new_sel) {
5361                         GdkRegion *tmp_region = NULL;
5362
5363                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5364                                                                cur_page,
5365                                                                view->scale,
5366                                                                &tmp_region);
5367
5368                         if (tmp_region) {
5369                                 new_sel->covered_region = gdk_region_copy (tmp_region);
5370                         }
5371                 }
5372
5373                 /* Now we figure out what needs redrawing */
5374                 if (old_sel && new_sel) {
5375                         if (old_sel->covered_region && new_sel->covered_region) {
5376                                 /* We only want to redraw the areas that have
5377                                  * changed, so we xor the old and new regions
5378                                  * and redraw if it's different */
5379                                 region = gdk_region_copy (old_sel->covered_region);
5380                                 gdk_region_xor (region, new_sel->covered_region);
5381                                 if (gdk_region_empty (region)) {
5382                                         gdk_region_destroy (region);
5383                                         region = NULL;
5384                                 }
5385                         } else if (old_sel->covered_region) {
5386                                 region = gdk_region_copy (old_sel->covered_region);
5387                         } else if (new_sel->covered_region) {
5388                                 region = gdk_region_copy (new_sel->covered_region);
5389                         }
5390                 } else if (old_sel && !new_sel) {
5391                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
5392                                 region = gdk_region_copy (old_sel->covered_region);
5393                         }
5394                 } else if (!old_sel && new_sel) {
5395                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
5396                                 region = gdk_region_copy (new_sel->covered_region);
5397                         }
5398                 } else {
5399                         g_assert_not_reached ();
5400                 }
5401
5402                 /* Redraw the damaged region! */
5403                 if (region) {
5404                         GdkRectangle page_area;
5405                         GtkBorder border;
5406
5407                         /* I don't know why but the region is smaller
5408                          * than expected. This hack fixes it, I guess
5409                          * 10 pixels more won't hurt
5410                          */
5411                         gdk_region_shrink (region, -5, -5);
5412
5413                         get_page_extents (view, cur_page, &page_area, &border);
5414                         gdk_region_offset (region,
5415                                            page_area.x + border.left - view->scroll_x,
5416                                            page_area.y + border.top - view->scroll_y);
5417                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
5418                         gdk_region_destroy (region);
5419                 }
5420         }
5421
5422         /* Free the old list, now that we're done with it. */
5423         g_list_foreach (old_list, (GFunc) selection_free, NULL);
5424         g_list_free (old_list);
5425 }
5426
5427 static void
5428 compute_selections (EvView          *view,
5429                     EvSelectionStyle style,
5430                     GdkPoint        *start,
5431                     GdkPoint        *stop)
5432 {
5433         GList *list;
5434
5435         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
5436                 list = compute_new_selection_rect (view, start, stop);
5437         else
5438                 list = compute_new_selection_text (view, style, start, stop);
5439         merge_selection_region (view, list);
5440 }
5441
5442 /* Free's the selection.  It's up to the caller to queue redraws if needed.
5443  */
5444 static void
5445 selection_free (EvViewSelection *selection)
5446 {
5447         if (selection->covered_region)
5448                 gdk_region_destroy (selection->covered_region);
5449         g_free (selection);
5450 }
5451
5452 static void
5453 clear_selection (EvView *view)
5454 {
5455         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5456         g_list_free (view->selection_info.selections);
5457         view->selection_info.selections = NULL;
5458         view->selection_info.in_selection = FALSE;
5459         if (view->pixbuf_cache)
5460                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
5461         g_object_notify (G_OBJECT (view), "has-selection");
5462 }
5463
5464 void
5465 ev_view_select_all (EvView *view)
5466 {
5467         GList *selections = NULL;
5468         int n_pages, i;
5469
5470         /* Disable selection on rotated pages for the 0.4.0 series */
5471         if (view->rotation != 0)
5472                 return;
5473
5474         clear_selection (view);
5475
5476         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5477         for (i = 0; i < n_pages; i++) {
5478                 int width, height;
5479                 EvViewSelection *selection;
5480
5481                 ev_page_cache_get_size (view->page_cache,
5482                                         i,
5483                                         view->rotation,
5484                                         1.0, &width, &height);
5485
5486                 selection = g_new0 (EvViewSelection, 1);
5487                 selection->page = i;
5488                 selection->style = EV_SELECTION_STYLE_GLYPH;
5489                 selection->rect.x1 = selection->rect.y1 = 0;
5490                 selection->rect.x2 = width;
5491                 selection->rect.y2 = height;
5492
5493                 selections = g_list_append (selections, selection);
5494         }
5495
5496         merge_selection_region (view, selections);
5497         gtk_widget_queue_draw (GTK_WIDGET (view));
5498 }
5499
5500 gboolean
5501 ev_view_get_has_selection (EvView *view)
5502 {
5503         return view->selection_info.selections != NULL;
5504 }
5505
5506 static char *
5507 get_selected_text (EvView *view)
5508 {
5509         GString *text;
5510         GList *l;
5511         gchar *normalized_text;
5512         EvRenderContext *rc;
5513
5514         text = g_string_new (NULL);
5515         rc = ev_render_context_new (NULL, view->rotation, view->scale);
5516
5517         ev_document_doc_mutex_lock ();
5518
5519         for (l = view->selection_info.selections; l != NULL; l = l->next) {
5520                 EvViewSelection *selection = (EvViewSelection *)l->data;
5521                 EvPage *page;
5522                 gchar *tmp;
5523
5524                 page = ev_document_get_page (view->document, selection->page);
5525                 ev_render_context_set_page (rc, page);
5526                 g_object_unref (page);
5527
5528                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
5529                                                       rc, selection->style,
5530                                                       &(selection->rect));
5531
5532                 g_string_append (text, tmp);
5533                 g_free (tmp);
5534         }
5535
5536         g_object_unref (rc);
5537
5538         ev_document_doc_mutex_unlock ();
5539
5540         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
5541         g_string_free (text, TRUE);
5542         return normalized_text;
5543 }
5544
5545 static void
5546 ev_view_clipboard_copy (EvView      *view,
5547                         const gchar *text)
5548 {
5549         GtkClipboard *clipboard;
5550
5551         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
5552                                               GDK_SELECTION_CLIPBOARD);
5553         gtk_clipboard_set_text (clipboard, text, -1);
5554 }
5555
5556 void
5557 ev_view_copy (EvView *ev_view)
5558 {
5559         char *text;
5560
5561         if (!EV_IS_SELECTION (ev_view->document))
5562                 return;
5563
5564         text = get_selected_text (ev_view);
5565         ev_view_clipboard_copy (ev_view, text);
5566         g_free (text);
5567 }
5568
5569 static void
5570 ev_view_primary_get_cb (GtkClipboard     *clipboard,
5571                         GtkSelectionData *selection_data,
5572                         guint             info,
5573                         gpointer          data)
5574 {
5575         EvView *ev_view = EV_VIEW (data);
5576
5577         if (ev_view->link_selected) {
5578                 gtk_selection_data_set_text (selection_data,
5579                                              ev_link_action_get_uri (ev_view->link_selected),
5580                                              -1);
5581         } else if (EV_IS_SELECTION (ev_view->document) &&
5582                    ev_view->selection_info.selections) {
5583                 gchar *text;
5584
5585                 text = get_selected_text (ev_view);
5586                 if (text) {
5587                         gtk_selection_data_set_text (selection_data, text, -1);
5588                         g_free (text);
5589                 }
5590         }
5591 }
5592
5593 static void
5594 ev_view_primary_clear_cb (GtkClipboard *clipboard,
5595                           gpointer      data)
5596 {
5597         EvView *view = EV_VIEW (data);
5598
5599         clear_selection (view);
5600         clear_link_selected (view);
5601 }
5602
5603 static void
5604 ev_view_update_primary_selection (EvView *ev_view)
5605 {
5606         GtkClipboard *clipboard;
5607
5608         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
5609                                               GDK_SELECTION_PRIMARY);
5610
5611         if (ev_view->selection_info.selections || ev_view->link_selected) {
5612                 GtkTargetList *target_list;
5613                 GtkTargetEntry *targets;
5614                 int n_targets;
5615
5616                 target_list = gtk_target_list_new (NULL, 0);
5617                 gtk_target_list_add_text_targets (target_list, 0);
5618                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
5619                 gtk_target_list_unref (target_list);
5620
5621                 if (!gtk_clipboard_set_with_owner (clipboard,
5622                                                    targets, n_targets,
5623                                                    ev_view_primary_get_cb,
5624                                                    ev_view_primary_clear_cb,
5625                                                    G_OBJECT (ev_view)))
5626                         ev_view_primary_clear_cb (clipboard, ev_view);
5627
5628                 gtk_target_table_free (targets, n_targets);
5629         } else {
5630                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
5631                         gtk_clipboard_clear (clipboard);
5632         }
5633 }
5634
5635 static void
5636 clear_link_selected (EvView *view)
5637 {
5638         if (view->link_selected) {
5639                 g_object_unref (view->link_selected);
5640                 view->link_selected = NULL;
5641         }
5642 }
5643
5644 void
5645 ev_view_copy_link_address (EvView       *view,
5646                            EvLinkAction *action)
5647 {
5648         clear_link_selected (view);
5649
5650         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
5651
5652         view->link_selected = g_object_ref (action);
5653         ev_view_update_primary_selection (view);
5654 }
5655
5656 /*** Cursor operations ***/
5657
5658 static GdkCursor *
5659 ev_view_create_invisible_cursor(void)
5660 {
5661        GdkBitmap *empty;
5662        GdkColor black = { 0, 0, 0, 0 };
5663        static char bits[] = { 0x00 };
5664
5665        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
5666
5667        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
5668 }
5669
5670 static void
5671 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
5672 {
5673         GdkCursor *cursor = NULL;
5674         GdkDisplay *display;
5675         GtkWidget *widget;
5676
5677         if (view->cursor == new_cursor) {
5678                 return;
5679         }
5680
5681         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
5682         display = gtk_widget_get_display (widget);
5683         view->cursor = new_cursor;
5684
5685         switch (new_cursor) {
5686                 case EV_VIEW_CURSOR_NORMAL:
5687                         gdk_window_set_cursor (view->layout.bin_window, NULL);
5688                         break;
5689                 case EV_VIEW_CURSOR_IBEAM:
5690                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
5691                         break;
5692                 case EV_VIEW_CURSOR_LINK:
5693                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
5694                         break;
5695                 case EV_VIEW_CURSOR_WAIT:
5696                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
5697                         break;
5698                 case EV_VIEW_CURSOR_HIDDEN:
5699                         cursor = ev_view_create_invisible_cursor ();
5700                         break;
5701                 case EV_VIEW_CURSOR_DRAG:
5702                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
5703                         break;
5704                 case EV_VIEW_CURSOR_AUTOSCROLL:
5705                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
5706                         break;
5707         }
5708
5709         if (cursor) {
5710                 gdk_window_set_cursor (view->layout.bin_window, cursor);
5711                 gdk_cursor_unref (cursor);
5712                 gdk_flush();
5713         }
5714 }
5715
5716 void
5717 ev_view_hide_cursor (EvView *view)
5718 {
5719        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
5720 }
5721
5722 void
5723 ev_view_show_cursor (EvView *view)
5724 {
5725        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
5726 }
5727
5728 static void
5729 ev_view_reset_presentation_state (EvView *view)
5730 {
5731         if (!view->presentation ||
5732             view->presentation_state == EV_PRESENTATION_NORMAL)
5733                 return;
5734
5735         view->presentation_state = EV_PRESENTATION_NORMAL;
5736         gdk_window_set_background (view->layout.bin_window,
5737                                    &GTK_WIDGET (view)->style->black);
5738         gtk_widget_queue_draw (GTK_WIDGET (view));
5739 }
5740
5741 gboolean
5742 ev_view_next_page (EvView *view)
5743 {
5744         int page, n_pages;
5745
5746         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5747
5748         if (!view->page_cache)
5749                 return FALSE;
5750
5751         if (view->presentation &&
5752             (view->presentation_state == EV_PRESENTATION_BLACK ||
5753              view->presentation_state == EV_PRESENTATION_WHITE)) {
5754                 ev_view_reset_presentation_state (view);
5755                 return FALSE;
5756         }
5757
5758         if (view->animation) {
5759                 ev_view_transition_animation_cancel (view->animation, view);
5760         }
5761
5762         ev_view_presentation_transition_stop (view);
5763         ev_view_reset_presentation_state (view);
5764
5765         page = ev_page_cache_get_current_page (view->page_cache);
5766         n_pages = ev_page_cache_get_n_pages (view->page_cache);
5767
5768         if (view->dual_page && !view->presentation)
5769                 page = page + 2;
5770         else
5771                 page = page + 1;
5772
5773         if (page < n_pages) {
5774                 ev_page_cache_set_current_page (view->page_cache, page);
5775                 return TRUE;
5776         } else if (view->presentation && page == n_pages) {
5777                 view->presentation_state = EV_PRESENTATION_END;
5778                 gtk_widget_queue_draw (GTK_WIDGET (view));
5779                 return TRUE;
5780         } else if (view->dual_page && page == n_pages) {
5781                 ev_page_cache_set_current_page (view->page_cache, page - 1);
5782                 return TRUE;
5783         } else {
5784                 return FALSE;
5785         }
5786 }
5787
5788 gboolean
5789 ev_view_previous_page (EvView *view)
5790 {
5791         int page;
5792
5793         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5794
5795         if (!view->page_cache)
5796                 return FALSE;
5797
5798         if (view->presentation &&
5799             view->presentation_state == EV_PRESENTATION_END) {
5800                 ev_view_reset_presentation_state (view);
5801                 return TRUE;
5802         }
5803
5804         if (view->presentation &&
5805             (view->presentation_state == EV_PRESENTATION_BLACK ||
5806              view->presentation_state == EV_PRESENTATION_WHITE)) {
5807                 ev_view_reset_presentation_state (view);
5808                 return FALSE;
5809         }
5810
5811         if (view->animation) {
5812                 ev_view_transition_animation_cancel (view->animation, view);
5813         }
5814
5815         ev_view_reset_presentation_state (view);
5816
5817         page = ev_page_cache_get_current_page (view->page_cache);
5818
5819         if (view->dual_page && !view->presentation)
5820                 page = page - 2;
5821         else
5822                 page = page - 1;
5823
5824         if (page >= 0) {
5825                 ev_page_cache_set_current_page (view->page_cache, page);
5826                 return TRUE;
5827         } else if (ev_view_get_dual_page (view) && page == -1) {
5828                 ev_page_cache_set_current_page (view->page_cache, 0);
5829                 return TRUE;
5830         } else {
5831                 return FALSE;
5832         }
5833 }
5834
5835 /*** Enum description for usage in signal ***/
5836
5837 void
5838 ev_view_update_view_size (EvView *view, GtkScrolledWindow * scrolled_window)
5839 {
5840         int width, height;
5841         GtkRequisition vsb_requisition;
5842         GtkRequisition hsb_requisition;
5843         int scrollbar_spacing;
5844
5845         /* Calculate the width available for the content */
5846         width  = GTK_WIDGET (scrolled_window)->allocation.width;
5847         height = GTK_WIDGET (scrolled_window)->allocation.height;
5848
5849         if (gtk_scrolled_window_get_shadow_type (scrolled_window) == GTK_SHADOW_IN
5850             && view) {
5851                 width -=  2 * GTK_WIDGET(view)->style->xthickness;
5852                 height -= 2 * GTK_WIDGET(view)->style->ythickness;
5853         }
5854
5855         gtk_widget_size_request (scrolled_window->vscrollbar, &vsb_requisition);
5856         gtk_widget_size_request (scrolled_window->hscrollbar, &hsb_requisition);
5857         gtk_widget_style_get (GTK_WIDGET (scrolled_window),
5858                               "scrollbar_spacing",
5859                               &scrollbar_spacing,
5860                               NULL);
5861
5862         if (EV_IS_VIEW(view)) {
5863                 ev_view_set_zoom_for_size (EV_VIEW (view),
5864                                            MAX (1, width),
5865                                            MAX (1, height),
5866                                            vsb_requisition.width + scrollbar_spacing,
5867                                            hsb_requisition.height + scrollbar_spacing);
5868         }
5869 }