libview/ev-view.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *  Copyright (C) 2004 Red Hat, Inc
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <math.h>
  25 #include <string.h>
  26
  27 #include <glib/gi18n-lib.h>
  28 #include <gtk/gtk.h>
  29 #include <gdk/gdkkeysyms.h>
  30
  31 #include "ev-mapping.h"
  32 #include "ev-document-forms.h"
  33 #include "ev-document-images.h"
  34 #include "ev-document-links.h"
  35 #include "ev-document-misc.h"
  36 #include "ev-document-transition.h"
  37 #include "ev-page-cache.h"
  38 #include "ev-pixbuf-cache.h"
  39 #include "ev-transition-animation.h"
  40 #include "ev-view-marshal.h"
  41 #include "ev-document-annotations.h"
  42 #include "ev-annotation-window.h"
  43 #include "ev-view.h"
  44 #include "ev-view-accessible.h"
  45 #include "ev-view-private.h"
  46 #include "ev-view-type-builtins.h"
  47
  48 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  49 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  50 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  51
  52 enum {
  53         PROP_0,
  54         PROP_CONTINUOUS,
  55         PROP_DUAL_PAGE,
  56         PROP_FULLSCREEN,
  57         PROP_PRESENTATION,
  58         PROP_SIZING_MODE,
  59         PROP_ZOOM,
  60         PROP_ROTATION,
  61         PROP_HAS_SELECTION,
  62 };
  63
  64 enum {
  65         SIGNAL_BINDING_ACTIVATED,
  66         SIGNAL_ZOOM_INVALID,
  67         SIGNAL_HANDLE_LINK,
  68         SIGNAL_EXTERNAL_LINK,
  69         SIGNAL_POPUP_MENU,
  70         N_SIGNALS,
  71 };
  72
  73 enum {
  74         TARGET_DND_URI,
  75         TARGET_DND_TEXT,
  76         TARGET_DND_IMAGE
  77 };
  78
  79 static guint signals[N_SIGNALS];
  80
  81 typedef enum {
  82         EV_VIEW_FIND_NEXT,
  83         EV_VIEW_FIND_PREV
  84 } EvViewFindDirection;
  85
  86 #define ZOOM_IN_FACTOR  1.2
  87 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  88
  89 #define MIN_SCALE 0.05409
  90 #define MAX_SCALE 4.0
  91
  92 #define SCROLL_TIME 150
  93
  94 /*** Scrolling ***/
  95 static void       scroll_to_current_page                     (EvView *view,
  96                                                               GtkOrientation orientation);
  97 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  98                                                               GtkAdjustment      *hadjustment,
  99                                                               GtkAdjustment      *vadjustment);
 100 static void       view_update_range_and_current_page         (EvView             *view);
 101 static void       set_scroll_adjustment                      (EvView             *view,
 102                                                               GtkOrientation      orientation,
 103                                                               GtkAdjustment      *adjustment);
 104 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 105                                                               guint               keyval,
 106                                                               GdkModifierType modifiers,
 107                                                               GtkScrollType       scroll,
 108                                                               gboolean            horizontal);
 109 static void       ensure_rectangle_is_visible                (EvView             *view,
 110                                                               GdkRectangle       *rect);
 111
 112 /*** Geometry computations ***/
 113 static void       compute_border                             (EvView             *view,
 114                                                               int                 width,
 115                                                               int                 height,
 116                                                               GtkBorder          *border);
 117 static void       get_page_y_offset                          (EvView             *view,
 118                                                               int                 page,
 119                                                               int                *y_offset);
 120 static gboolean   get_page_extents                           (EvView             *view,
 121                                                               gint                page,
 122                                                               GdkRectangle       *page_area,
 123                                                               GtkBorder          *border);
 124 static void       view_rect_to_doc_rect                      (EvView             *view,
 125                                                               GdkRectangle       *view_rect,
 126                                                               GdkRectangle       *page_area,
 127                                                               EvRectangle        *doc_rect);
 128 static void       doc_rect_to_view_rect                      (EvView             *view,
 129                                                               int                 page,
 130                                                               EvRectangle        *doc_rect,
 131                                                               GdkRectangle       *view_rect);
 132 static gboolean   get_dual_even_left                         (EvView             *view);
 133 static void       find_page_at_location                      (EvView             *view,
 134                                                               gdouble             x,
 135                                                               gdouble             y,
 136                                                               gint               *page,
 137                                                               gint               *x_offset,
 138                                                               gint               *y_offset);
 139 static gboolean  doc_point_to_view_point                     (EvView             *view,
 140                                                               int                 page,
 141                                                               EvPoint            *doc_point,
 142                                                               GdkPoint           *view_point);
 143 /*** Hyperrefs ***/
 144 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 145                                                               gdouble             x,
 146                                                               gdouble             y);
 147 static char*      tip_from_link                              (EvView             *view,
 148                                                               EvLink             *link);
 149 /*** Forms ***/
 150 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 151                                                                gdouble            x,
 152                                                                gdouble            y);
 153
 154 /*** Annotations ***/
 155 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 156                                                               gdouble             x,
 157                                                               gdouble             y);
 158 static void          show_annotation_windows                 (EvView             *view,
 159                                                               gint                page);
 160 static void          hide_annotation_windows                 (EvView             *view,
 161                                                               gint                page);
 162 /*** GtkWidget implementation ***/
 163 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 164                                                               GtkRequisition     *requisition);
 165 static void       ev_view_size_request_continuous            (EvView             *view,
 166                                                               GtkRequisition     *requisition);
 167 static void       ev_view_size_request_dual_page             (EvView             *view,
 168                                                               GtkRequisition     *requisition);
 169 static void       ev_view_size_request_single_page           (EvView             *view,
 170                                                               GtkRequisition     *requisition);
 171 static void       ev_view_size_request                       (GtkWidget          *widget,
 172                                                               GtkRequisition     *requisition);
 173 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 174                                                               GtkAllocation      *allocation);
 175 static void       ev_view_realize                            (GtkWidget          *widget);
 176 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 177                                                               GdkEventScroll     *event);
 178 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 179                                                               GdkEventExpose     *event);
 180 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 181 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 182                                                               GdkEventButton     *event);
 183 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 184                                                               GdkEventMotion     *event);
 185 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 186                                                               GdkEventButton     *event);
 187 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 188                                                               GdkEventCrossing   *event);
 189 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 190                                                               GdkEventCrossing   *event);
 191 static void       ev_view_style_set                          (GtkWidget          *widget,
 192                                                               GtkStyle           *old_style);
 193 static void       ev_view_remove_all                         (EvView             *view);
 194
 195 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 196
 197 /*** Drawing ***/
 198 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 199 static void       draw_rubberband                            (GtkWidget          *widget,
 200                                                               GdkWindow          *window,
 201                                                               const GdkRectangle *rect,
 202                                                               guchar              alpha);
 203 static void       highlight_find_results                     (EvView             *view,
 204                                                               int                 page);
 205 static void       draw_one_page                              (EvView             *view,
 206                                                               gint                page,
 207                                                               cairo_t            *cr,
 208                                                               GdkRectangle       *page_area,
 209                                                               GtkBorder          *border,
 210                                                               GdkRectangle       *expose_area,
 211                                                               gboolean           *page_ready);
 212 static void       draw_loading_text                          (EvView             *view,
 213                                                               GdkRectangle       *page_area,
 214                                                               GdkRectangle       *expose_area);
 215 static void       ev_view_reload_page                        (EvView             *view,
 216                                                               gint                page,
 217                                                               GdkRegion          *region);
 218
 219 /*** Callbacks ***/
 220 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 221                                                               GdkRegion          *region,
 222                                                               EvView             *view);
 223 static void       page_changed_cb                            (EvPageCache        *page_cache,
 224                                                               int                 new_page,
 225                                                               EvView             *view);
 226 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 227                                                               EvView             *view);
 228
 229 /*** GObject ***/
 230 static void       ev_view_finalize                           (GObject            *object);
 231 static void       ev_view_destroy                            (GtkObject          *object);
 232 static void       ev_view_set_property                       (GObject            *object,
 233                                                               guint               prop_id,
 234                                                               const GValue       *value,
 235                                                               GParamSpec         *pspec);
 236 static void       ev_view_get_property                       (GObject            *object,
 237                                                               guint               prop_id,
 238                                                               GValue             *value,
 239                                                               GParamSpec         *pspec);
 240 static void       ev_view_class_init                         (EvViewClass        *class);
 241 static void       ev_view_init                               (EvView             *view);
 242
 243 /*** Zoom and sizing ***/
 244 static double   zoom_for_size_fit_width                      (gdouble doc_width,
 245                                                               gdouble doc_height,
 246                                                               int     target_width,
 247                                                               int     target_height,
 248                                                               int     vsb_width);
 249 static double   zoom_for_size_fit_height                     (gdouble doc_width,
 250                                                               gdouble doc_height,
 251                                                               int     target_width,
 252                                                               int     target_height,
 253                                                               int     vsb_height);
 254 static double   zoom_for_size_best_fit                       (gdouble doc_width,
 255                                                               gdouble doc_height,
 256                                                               int     target_width,
 257                                                               int     target_height,
 258                                                               int     vsb_width,
 259                                                               int     hsb_width);
 260 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 261                                                               int     width,
 262                                                               int     height);
 263 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 264                                                                 int     width,
 265                                                                 int     height,
 266                                                                 int     vsb_width,
 267                                                                 int     hsb_height);
 268 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 269                                                                 int     width,
 270                                                                 int     height,
 271                                                                 int     vsb_width,
 272                                                                 int     hsb_height);
 273 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 274                                                                 int     width,
 275                                                                 int     height,
 276                                                                 int     vsb_width,
 277                                                                 int     hsb_height);
 278 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 279                                                                 int     width,
 280                                                                 int     height,
 281                                                                 int     vsb_width,
 282                                                                 int     hsb_height);
 283 /*** Cursors ***/
 284 static GdkCursor* ev_view_create_invisible_cursor            (void);
 285 static void       ev_view_set_cursor                         (EvView             *view,
 286                                                               EvViewCursor        new_cursor);
 287 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 288                                                               gint x,
 289                                                               gint y);
 290
 291 /*** Find ***/
 292 static gint         ev_view_find_get_n_results               (EvView             *view,
 293                                                               gint                page);
 294 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 295                                                               gint                page,
 296                                                               gint                result);
 297 static void       jump_to_find_result                        (EvView             *view);
 298 static void       jump_to_find_page                          (EvView             *view,
 299                                                               EvViewFindDirection direction,
 300                                                               gint                shift);
 301
 302 /*** Selection ***/
 303 static void       compute_selections                         (EvView             *view,
 304                                                               EvSelectionStyle    style,
 305                                                               GdkPoint           *start,
 306                                                               GdkPoint           *stop);
 307 static void       clear_selection                            (EvView             *view);
 308 static void       clear_link_selected                        (EvView             *view);
 309 static void       selection_free                             (EvViewSelection    *selection);
 310 static char*      get_selected_text                          (EvView             *ev_view);
 311 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 312                                                               GtkSelectionData   *selection_data,
 313                                                               guint               info,
 314                                                               gpointer            data);
 315 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 316                                                               gpointer            data);
 317 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 318
 319 /*** Presentation ***/
 320 static void       ev_view_presentation_transition_start      (EvView             *ev_view);
 321 static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
 322
 323
 324 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 325
 326 /* HeightToPage cache */
 327 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 328
 329 static void
 330 build_height_to_page (EvHeightToPageCache *cache,
 331                       EvDocument          *document,
 332                       gint                 rotation)
 333 {
 334         gboolean swap, uniform, dual_even_left;
 335         int i;
 336         double uniform_height, page_height, next_page_height;
 337         double saved_height;
 338         gdouble u_width, u_height;
 339         gint n_pages;
 340
 341         swap = (rotation == 90 || rotation == 270);
 342
 343         uniform = ev_document_is_page_size_uniform (document);
 344         n_pages = ev_document_get_n_pages (document);
 345         dual_even_left = (n_pages > 2);
 346
 347         g_free (cache->height_to_page);
 348         g_free (cache->dual_height_to_page);
 349
 350         cache->rotation = rotation;
 351         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 352         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 353
 354         if (uniform)
 355                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 356
 357         saved_height = 0;
 358         for (i = 0; i <= n_pages; i++) {
 359                 if (uniform) {
 360                         uniform_height = swap ? u_width : u_height;
 361                         cache->height_to_page[i] = i * uniform_height;
 362                 } else {
 363                         if (i < n_pages) {
 364                                 gdouble w, h;
 365
 366                                 ev_document_get_page_size (document, i, &w, &h);
 367                                 page_height = swap ? w : h;
 368                         } else {
 369                                 page_height = 0;
 370                         }
 371                         cache->height_to_page[i] = saved_height;
 372                         saved_height += page_height;
 373                 }
 374         }
 375
 376         if (dual_even_left && !uniform) {
 377                 gdouble w, h;
 378
 379                 ev_document_get_page_size (document, 0, &w, &h);
 380                 saved_height = swap ? w : h;
 381         } else {
 382                 saved_height = 0;
 383         }
 384
 385         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 386                 if (uniform) {
 387                         uniform_height = swap ? u_width : u_height;
 388                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 389                         if (i + 1 < n_pages + 2)
 390                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 391                 } else {
 392                         if (i + 1 < n_pages) {
 393                                 gdouble w, h;
 394
 395                                 ev_document_get_page_size (document, i + 1, &w, &h);
 396                                 next_page_height = swap ? w : h;
 397                         } else {
 398                                 next_page_height = 0;
 399                         }
 400
 401                         if (i < n_pages) {
 402                                 gdouble w, h;
 403
 404                                 ev_document_get_page_size (document, i, &w, &h);
 405                                 page_height = swap ? w : h;
 406                         } else {
 407                                 page_height = 0;
 408                         }
 409
 410                         if (i + 1 < n_pages + 2) {
 411                                 cache->dual_height_to_page[i] = saved_height;
 412                                 cache->dual_height_to_page[i + 1] = saved_height;
 413                                 saved_height += MAX(page_height, next_page_height);
 414                         } else {
 415                                 cache->dual_height_to_page[i] = saved_height;
 416                         }
 417                 }
 418         }
 419 }
 420
 421 static void
 422 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 423                                     EvDocument          *document,
 424                                     gint                 page,
 425                                     gint                 rotation,
 426                                     gdouble             *height,
 427                                     gdouble             *dual_height)
 428 {
 429         if (cache->rotation != rotation)
 430                 build_height_to_page (cache, document, rotation);
 431
 432         *height = cache->height_to_page[page];
 433         *dual_height = cache->dual_height_to_page[page];
 434 }
 435
 436 static void
 437 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 438 {
 439         if (cache->height_to_page) {
 440                 g_free (cache->height_to_page);
 441                 cache->height_to_page = NULL;
 442         }
 443
 444         if (cache->dual_height_to_page) {
 445                 g_free (cache->dual_height_to_page);
 446                 cache->dual_height_to_page = NULL;
 447         }
 448         g_free (cache);
 449 }
 450
 451 static EvHeightToPageCache *
 452 ev_view_get_height_to_page_cache (EvView *view)
 453 {
 454         EvHeightToPageCache *cache;
 455
 456         if (!view->document)
 457                 return NULL;
 458
 459         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 460         if (!cache) {
 461                 cache = g_new0 (EvHeightToPageCache, 1);
 462                 build_height_to_page (cache, view->document, view->rotation);
 463                 g_object_set_data_full (G_OBJECT (view->document),
 464                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 465                                         cache,
 466                                         (GDestroyNotify)ev_height_to_page_cache_free);
 467         }
 468
 469         return cache;
 470 }
 471
 472 static void
 473 ev_view_get_height_to_page (EvView *view,
 474                             gint    page,
 475                             gint   *height,
 476                             gint   *dual_height)
 477 {
 478         gdouble h, dh;
 479
 480         if (!view->height_to_page_cache)
 481                 return;
 482
 483         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 484                                             view->document,
 485                                             page,
 486                                             view->rotation,
 487                                             &h, &dh);
 488         if (height)
 489                 *height = (gint)(h * view->scale + 0.5);
 490
 491         if (dual_height)
 492                 *dual_height = (gint)(dh * view->scale + 0.5);
 493 }
 494
 495 static void
 496 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 497 {
 498         GdkPoint view_point;
 499
 500         if (view->document == NULL) {
 501                 return;
 502         }
 503
 504         doc_point_to_view_point (view, view->current_page, &view->pending_point, &view_point);
 505
 506         if (orientation == GTK_ORIENTATION_VERTICAL) {
 507                 view->pending_point.y = 0;
 508         } else {
 509                 view->pending_point.x = 0;
 510         }
 511
 512         if (orientation == GTK_ORIENTATION_VERTICAL) {
 513                 if (view->continuous) {
 514                         gtk_adjustment_clamp_page (view->vadjustment,
 515                                                    view_point.y - view->spacing / 2,
 516                                                    view_point.y + view->vadjustment->page_size);
 517                 } else {
 518                         gtk_adjustment_set_value (view->vadjustment,
 519                                                   CLAMP (view_point.y,
 520                                                   view->vadjustment->lower,
 521                                                   view->vadjustment->upper -
 522                                                   view->vadjustment->page_size));
 523                 }
 524         } else {
 525                 if (view->dual_page) {
 526                         gtk_adjustment_clamp_page (view->hadjustment,
 527                                                    view_point.x,
 528                                                    view_point.x + view->hadjustment->page_size);
 529                 } else {
 530                         gtk_adjustment_set_value (view->hadjustment,
 531                                                   CLAMP (view_point.x,
 532                                                   view->hadjustment->lower,
 533                                                   view->hadjustment->upper -
 534                                                   view->hadjustment->page_size));
 535                 }
 536         }
 537 }
 538
 539 static void
 540 view_set_adjustment_values (EvView         *view,
 541                             GtkOrientation  orientation)
 542 {
 543         GtkWidget *widget = GTK_WIDGET (view);
 544         GtkAdjustment *adjustment;
 545         int requisition;
 546         int allocation;
 547
 548         double factor;
 549         gint new_value;
 550
 551         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 552                 requisition = widget->requisition.width;
 553                 allocation = widget->allocation.width;
 554                 adjustment = view->hadjustment;
 555         } else {
 556                 requisition = widget->requisition.height;
 557                 allocation = widget->allocation.height;
 558                 adjustment = view->vadjustment;
 559         }
 560
 561         if (!adjustment)
 562                 return;
 563
 564         factor = 1.0;
 565         switch (view->pending_scroll) {
 566                 case SCROLL_TO_KEEP_POSITION:
 567                 case SCROLL_TO_FIND_LOCATION:
 568                         factor = (adjustment->value) / adjustment->upper;
 569                         break;
 570                 case SCROLL_TO_PAGE_POSITION:
 571                         break;
 572                 case SCROLL_TO_CENTER:
 573                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 574                         break;
 575         }
 576
 577         adjustment->page_size = allocation;
 578         adjustment->step_increment = allocation * 0.1;
 579         adjustment->page_increment = allocation * 0.9;
 580         adjustment->lower = 0;
 581         adjustment->upper = MAX (allocation, requisition);
 582
 583         /*
 584          * We add 0.5 to the values before to average out our rounding errors.
 585          */
 586         switch (view->pending_scroll) {
 587                 case SCROLL_TO_KEEP_POSITION:
 588                 case SCROLL_TO_FIND_LOCATION:
 589                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 590                         gtk_adjustment_set_value (adjustment, (int)new_value);
 591                         break;
 592                 case SCROLL_TO_PAGE_POSITION:
 593                         scroll_to_current_page (view, orientation);
 594                         break;
 595                 case SCROLL_TO_CENTER:
 596                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 597                                            0, adjustment->upper - adjustment->page_size);
 598                         gtk_adjustment_set_value (adjustment, (int)new_value);
 599                         break;
 600         }
 601
 602         gtk_adjustment_changed (adjustment);
 603 }
 604
 605 static void
 606 view_update_range_and_current_page (EvView *view)
 607 {
 608         gint current_page;
 609         gint best_current_page = -1;
 610         gint start = view->start_page;
 611         gint end = view->end_page;
 612
 613         /* Presentation trumps all other modes */
 614         if (view->presentation) {
 615                 view->start_page = view->current_page;
 616                 view->end_page = view->current_page;
 617         } else if (view->continuous) {
 618                 GdkRectangle current_area, unused, page_area;
 619                 GtkBorder border;
 620                 gboolean found = FALSE;
 621                 gint area_max = -1, area;
 622                 int i;
 623
 624                 if (!(view->vadjustment && view->hadjustment))
 625                         return;
 626
 627                 current_area.x = view->hadjustment->value;
 628                 current_area.width = view->hadjustment->upper;
 629                 current_area.y = view->vadjustment->value;
 630                 current_area.height = view->vadjustment->page_size;
 631
 632                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 633
 634                         get_page_extents (view, i, &page_area, &border);
 635
 636                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 637                                 area = unused.width * unused.height;
 638
 639                                 if (!found) {
 640                                         area_max = area;
 641                                         view->start_page = i;
 642                                         found = TRUE;
 643                                         best_current_page = i;
 644                                 }
 645                                 if (area > area_max) {
 646                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 647                                         area_max = area;
 648                                 }
 649
 650                                 view->end_page = i;
 651                         } else if (found && view->current_page <= view->end_page) {
 652                                 break;
 653                         }
 654                 }
 655
 656         } else if (view->dual_page) {
 657                 if (view->current_page % 2 == get_dual_even_left (view)) {
 658                         view->start_page = view->current_page;
 659                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 660                                 view->end_page = view->start_page + 1;
 661                         else
 662                                 view->end_page = view->start_page;
 663                 } else {
 664                         if (view->current_page < 1)
 665                                 view->start_page = view->current_page;
 666                         else
 667                                 view->start_page = view->current_page - 1;
 668                         view->end_page = view->current_page;
 669                 }
 670         } else {
 671                 view->start_page = view->current_page;
 672                 view->end_page = view->current_page;
 673         }
 674
 675         best_current_page = MAX (best_current_page, view->start_page);
 676         current_page = ev_page_cache_get_current_page (view->page_cache);
 677
 678         if ((current_page != best_current_page) && (view->pending_scroll == SCROLL_TO_KEEP_POSITION)) {
 679                 view->current_page = best_current_page;
 680                 ev_page_cache_set_current_page (view->page_cache, best_current_page);
 681         }
 682
 683         if (start != view->start_page || end != view->end_page) {
 684                 gint i;
 685
 686                 for (i = start; i < view->start_page; i++) {
 687                         hide_annotation_windows (view, i);
 688                 }
 689
 690                 for (i = end; i > view->end_page; i--) {
 691                         hide_annotation_windows (view, i);
 692                 }
 693         }
 694
 695         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 696                                         view->start_page,
 697                                         view->end_page,
 698                                         view->rotation,
 699                                         view->scale,
 700                                         view->selection_info.selections);
 701 }
 702
 703 static void
 704 set_scroll_adjustment (EvView *view,
 705                        GtkOrientation  orientation,
 706                        GtkAdjustment  *adjustment)
 707 {
 708         GtkAdjustment **to_set;
 709
 710         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 711                 to_set = &view->hadjustment;
 712         else
 713                 to_set = &view->vadjustment;
 714
 715         if (*to_set != adjustment) {
 716                 if (*to_set) {
 717                         g_signal_handlers_disconnect_by_func (*to_set,
 718                                                               (gpointer) on_adjustment_value_changed,
 719                                                               view);
 720                         g_object_unref (*to_set);
 721                 }
 722
 723                 *to_set = adjustment;
 724                 view_set_adjustment_values (view, orientation);
 725
 726                 if (*to_set) {
 727                         g_object_ref (*to_set);
 728                         g_signal_connect (*to_set, "value_changed",
 729                                           G_CALLBACK (on_adjustment_value_changed), view);
 730                 }
 731         }
 732 }
 733
 734 static void
 735 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 736                                 GtkAdjustment  *hadjustment,
 737                                 GtkAdjustment  *vadjustment)
 738 {
 739         EvView *view = EV_VIEW (layout);
 740
 741         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 742         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 743
 744         on_adjustment_value_changed (NULL, view);
 745 }
 746
 747 static void
 748 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 749                            guint           keyval,
 750                            GdkModifierType modifiers,
 751                            GtkScrollType   scroll,
 752                            gboolean        horizontal)
 753 {
 754   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 755
 756   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 757                                 "binding_activated", 2,
 758                                 GTK_TYPE_SCROLL_TYPE, scroll,
 759                                 G_TYPE_BOOLEAN, horizontal);
 760   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 761                                 "binding_activated", 2,
 762                                 GTK_TYPE_SCROLL_TYPE, scroll,
 763                                 G_TYPE_BOOLEAN, horizontal);
 764 }
 765
 766 void
 767 ev_view_scroll (EvView        *view,
 768                 GtkScrollType  scroll,
 769                 gboolean       horizontal)
 770 {
 771         GtkAdjustment *adjustment;
 772         double value, increment;
 773         gboolean first_page = FALSE;
 774         gboolean last_page = FALSE;
 775
 776         view->jump_to_find_result = FALSE;
 777
 778         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 779                 switch (scroll) {
 780                         case GTK_SCROLL_PAGE_BACKWARD:
 781                         case GTK_SCROLL_STEP_BACKWARD:
 782                                 ev_view_previous_page (view);
 783                                 break;
 784                         case GTK_SCROLL_PAGE_FORWARD:
 785                         case GTK_SCROLL_STEP_FORWARD:
 786                                 ev_view_next_page (view);
 787                                 break;
 788                         default:
 789                                 break;
 790                 }
 791                 return;
 792         }
 793
 794         /* Assign values for increment and vertical adjustment */
 795         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 796         increment = adjustment->page_size * 0.75;
 797         value = adjustment->value;
 798
 799         /* Assign boolean for first and last page */
 800         if (view->current_page == 0)
 801                 first_page = TRUE;
 802         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 803                 last_page = TRUE;
 804
 805         switch (scroll) {
 806                 case GTK_SCROLL_PAGE_BACKWARD:
 807                         /* Do not jump backwards if at the first page */
 808                         if (value == (adjustment->lower) && first_page) {
 809                                 /* Do nothing */
 810                                 /* At the top of a page, assign the upper bound limit of previous page */
 811                         } else if (value == (adjustment->lower)) {
 812                                 value = adjustment->upper - adjustment->page_size;
 813                                 ev_view_previous_page (view);
 814                                 /* Jump to the top */
 815                         } else {
 816                                 value = MAX (value - increment, adjustment->lower);
 817                         }
 818                         break;
 819                 case GTK_SCROLL_PAGE_FORWARD:
 820                         /* Do not jump forward if at the last page */
 821                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 822                                 /* Do nothing */
 823                         /* At the bottom of a page, assign the lower bound limit of next page */
 824                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 825                                 value = 0;
 826                                 ev_view_next_page (view);
 827                         /* Jump to the bottom */
 828                         } else {
 829                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 830                         }
 831                         break;
 832                 case GTK_SCROLL_STEP_BACKWARD:
 833                         value -= adjustment->step_increment;
 834                         break;
 835                 case GTK_SCROLL_STEP_FORWARD:
 836                         value += adjustment->step_increment;
 837                         break;
 838                 case GTK_SCROLL_STEP_DOWN:
 839                         value -= adjustment->step_increment / 10;
 840                         break;
 841                 case GTK_SCROLL_STEP_UP:
 842                         value += adjustment->step_increment / 10;
 843                         break;
 844                 default:
 845                         break;
 846         }
 847
 848         value = CLAMP (value, adjustment->lower,
 849                        adjustment->upper - adjustment->page_size);
 850
 851         gtk_adjustment_set_value (adjustment, value);
 852 }
 853
 854 #define MARGIN 5
 855
 856 static void
 857 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 858 {
 859         GtkWidget *widget = GTK_WIDGET (view);
 860         GtkAdjustment *adjustment;
 861         int value;
 862
 863         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 864
 865         adjustment = view->vadjustment;
 866
 867         if (rect->y < adjustment->value) {
 868                 value = MAX (adjustment->lower, rect->y - MARGIN);
 869                 gtk_adjustment_set_value (view->vadjustment, value);
 870         } else if (rect->y + rect->height >
 871                    adjustment->value + widget->allocation.height) {
 872                 value = MIN (adjustment->upper, rect->y + rect->height -
 873                              widget->allocation.height + MARGIN);
 874                 gtk_adjustment_set_value (view->vadjustment, value);
 875         }
 876
 877         adjustment = view->hadjustment;
 878
 879         if (rect->x < adjustment->value) {
 880                 value = MAX (adjustment->lower, rect->x - MARGIN);
 881                 gtk_adjustment_set_value (view->hadjustment, value);
 882         } else if (rect->x + rect->height >
 883                    adjustment->value + widget->allocation.width) {
 884                 value = MIN (adjustment->upper, rect->x + rect->width -
 885                              widget->allocation.width + MARGIN);
 886                 gtk_adjustment_set_value (view->hadjustment, value);
 887         }
 888
 889         gtk_widget_queue_resize (GTK_WIDGET (view));
 890 }
 891
 892 /*** Geometry computations ***/
 893
 894 static void
 895 compute_border (EvView *view, int width, int height, GtkBorder *border)
 896 {
 897         if (view->presentation) {
 898                 border->left = 0;
 899                 border->right = 0;
 900                 border->top = 0;
 901                 border->bottom = 0;
 902         } else {
 903                 ev_document_misc_get_page_border_size (width, height, border);
 904         }
 905 }
 906
 907 static void
 908 get_page_y_offset (EvView *view, int page, int *y_offset)
 909 {
 910         int max_width, offset;
 911         GtkBorder border;
 912
 913         g_return_if_fail (y_offset != NULL);
 914
 915         ev_page_cache_get_max_width (view->page_cache, view->rotation, view->scale, &max_width);
 916
 917         compute_border (view, max_width, max_width, &border);
 918
 919         if (view->dual_page) {
 920                 ev_view_get_height_to_page (view, page, NULL, &offset);
 921                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
 922                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
 923         } else {
 924                 ev_view_get_height_to_page (view, page, &offset, NULL);
 925                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 926         }
 927
 928         *y_offset = offset;
 929         return;
 930 }
 931
 932 static gboolean
 933 get_page_extents (EvView       *view,
 934                   gint          page,
 935                   GdkRectangle *page_area,
 936                   GtkBorder    *border)
 937 {
 938         GtkWidget *widget;
 939         int width, height;
 940
 941         widget = GTK_WIDGET (view);
 942
 943         /* Get the size of the page */
 944         ev_page_cache_get_size (view->page_cache, page,
 945                                 view->rotation,
 946                                 view->scale,
 947                                 &width, &height);
 948         compute_border (view, width, height, border);
 949         page_area->width = width + border->left + border->right;
 950         page_area->height = height + border->top + border->bottom;
 951
 952         if (view->presentation) {
 953                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 954                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 955         } else if (view->continuous) {
 956                 gint max_width;
 957                 gint x, y;
 958
 959                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 960                                              view->scale, &max_width);
 961                 max_width = max_width + border->left + border->right;
 962                 /* Get the location of the bounding box */
 963                 if (view->dual_page) {
 964                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
 965                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 966                         if (page % 2 == get_dual_even_left (view))
 967                                 x = x + (max_width - width - border->left - border->right);
 968                 } else {
 969                         x = view->spacing;
 970                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 971                 }
 972
 973                 get_page_y_offset (view, page, &y);
 974
 975                 page_area->x = x;
 976                 page_area->y = y;
 977         } else {
 978                 gint x, y;
 979                 if (view->dual_page) {
 980                         gint width_2, height_2;
 981                         gint max_width = width;
 982                         gint max_height = height;
 983                         GtkBorder overall_border;
 984                         gint other_page;
 985
 986                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
 987
 988                         /* First, we get the bounding box of the two pages */
 989                         if (other_page < ev_document_get_n_pages (view->document)
 990                             && (0 <= other_page)) {
 991                                 ev_page_cache_get_size (view->page_cache,
 992                                                         other_page,
 993                                                         view->rotation,
 994                                                         view->scale,
 995                                                         &width_2, &height_2);
 996                                 if (width_2 > width)
 997                                         max_width = width_2;
 998                                 if (height_2 > height)
 999                                         max_height = height_2;
1000                         }
1001                         compute_border (view, max_width, max_height, &overall_border);
1002
1003                         /* Find the offsets */
1004                         x = view->spacing;
1005                         y = view->spacing;
1006
1007                         /* Adjust for being the left or right page */
1008                         if (page % 2 == get_dual_even_left (view))
1009                                 x = x + max_width - width;
1010                         else
1011                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1012
1013                         y = y + (max_height - height)/2;
1014
1015                         /* Adjust for extra allocation */
1016                         x = x + MAX (0, widget->allocation.width -
1017                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1018                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
1019                 } else {
1020                         x = view->spacing;
1021                         y = view->spacing;
1022
1023                         /* Adjust for extra allocation */
1024                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1025                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1026                 }
1027
1028                 page_area->x = x;
1029                 page_area->y = y;
1030         }
1031
1032         return TRUE;
1033 }
1034
1035 static void
1036 get_doc_page_size (EvView  *view,
1037                    gint     page,
1038                    gdouble *width,
1039                    gdouble *height)
1040 {
1041         double w, h;
1042
1043         ev_document_get_page_size (view->document, page, &w, &h);
1044         if (view->rotation == 0 || view->rotation == 180) {
1045                 if (width) *width = w;
1046                 if (height) *height = h;
1047         } else {
1048                 if (width) *width = h;
1049                 if (height) *height = w;
1050         }
1051 }
1052
1053 static void
1054 view_point_to_doc_point (EvView *view,
1055                          GdkPoint *view_point,
1056                          GdkRectangle *page_area,
1057                          double  *doc_point_x,
1058                          double  *doc_point_y)
1059 {
1060         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1061         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1062 }
1063
1064 static void
1065 view_rect_to_doc_rect (EvView *view,
1066                        GdkRectangle *view_rect,
1067                        GdkRectangle *page_area,
1068                        EvRectangle  *doc_rect)
1069 {
1070         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1071         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1072         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1073         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1074 }
1075
1076 static gboolean
1077 doc_point_to_view_point (EvView       *view,
1078                          int           page,
1079                          EvPoint      *doc_point,
1080                          GdkPoint     *view_point)
1081 {
1082         GdkRectangle page_area;
1083         GtkBorder border;
1084         double x, y, view_x, view_y;
1085         gdouble width, height;
1086
1087         get_doc_page_size (view, page, &width, &height);
1088
1089         if (view->rotation == 0) {
1090                 x = doc_point->x;
1091                 y = doc_point->y;
1092         } else if (view->rotation == 90) {
1093                 x = width - doc_point->y;
1094                 y = doc_point->x;
1095         } else if (view->rotation == 180) {
1096                 x = width - doc_point->x;
1097                 y = height - doc_point->y;
1098         } else if (view->rotation == 270) {
1099                 x = doc_point->y;
1100                 y = height - doc_point->x;
1101         } else {
1102                 g_assert_not_reached ();
1103         }
1104
1105         get_page_extents (view, page, &page_area, &border);
1106
1107         view_x = x * view->scale;
1108         view_y = y * view->scale;
1109         view_point->x = view_x + page_area.x;
1110         view_point->y = view_y + page_area.y;
1111
1112         return (view_x > 0 && view_x <= page_area.width &&
1113                 view_y > 0 && view_y <= page_area.height);
1114 }
1115
1116 static void
1117 doc_rect_to_view_rect (EvView       *view,
1118                        int           page,
1119                        EvRectangle  *doc_rect,
1120                        GdkRectangle *view_rect)
1121 {
1122         GdkRectangle page_area;
1123         GtkBorder border;
1124         double x, y, w, h;
1125         gdouble width, height;
1126
1127         get_doc_page_size (view, page, &width, &height);
1128
1129         if (view->rotation == 0) {
1130                 x = doc_rect->x1;
1131                 y = doc_rect->y1;
1132                 w = doc_rect->x2 - doc_rect->x1;
1133                 h = doc_rect->y2 - doc_rect->y1;
1134         } else if (view->rotation == 90) {
1135                 x = width - doc_rect->y2;
1136                 y = doc_rect->x1;
1137                 w = doc_rect->y2 - doc_rect->y1;
1138                 h = doc_rect->x2 - doc_rect->x1;
1139         } else if (view->rotation == 180) {
1140                 x = width - doc_rect->x2;
1141                 y = height - doc_rect->y2;
1142                 w = doc_rect->x2 - doc_rect->x1;
1143                 h = doc_rect->y2 - doc_rect->y1;
1144         } else if (view->rotation == 270) {
1145                 x = doc_rect->y1;
1146                 y = height - doc_rect->x2;
1147                 w = doc_rect->y2 - doc_rect->y1;
1148                 h = doc_rect->x2 - doc_rect->x1;
1149         } else {
1150                 g_assert_not_reached ();
1151         }
1152
1153         get_page_extents (view, page, &page_area, &border);
1154
1155         view_rect->x = x * view->scale + page_area.x;
1156         view_rect->y = y * view->scale + page_area.y;
1157         view_rect->width = w * view->scale;
1158         view_rect->height = h * view->scale;
1159 }
1160
1161 static gboolean
1162 get_dual_even_left (EvView *view)
1163 {
1164         return (ev_document_get_n_pages (view->document) > 2);
1165 }
1166
1167 static void
1168 find_page_at_location (EvView  *view,
1169                        gdouble  x,
1170                        gdouble  y,
1171                        gint    *page,
1172                        gint    *x_offset,
1173                        gint    *y_offset)
1174 {
1175         int i;
1176
1177         if (view->document == NULL)
1178                 return;
1179
1180         g_assert (page);
1181         g_assert (x_offset);
1182         g_assert (y_offset);
1183
1184         for (i = view->start_page; i <= view->end_page; i++) {
1185                 GdkRectangle page_area;
1186                 GtkBorder border;
1187
1188                 if (! get_page_extents (view, i, &page_area, &border))
1189                         continue;
1190
1191                 if ((x >= page_area.x + border.left) &&
1192                     (x < page_area.x + page_area.width - border.right) &&
1193                     (y >= page_area.y + border.top) &&
1194                     (y < page_area.y + page_area.height - border.bottom)) {
1195                         *page = i;
1196                         *x_offset = x - (page_area.x + border.left);
1197                         *y_offset = y - (page_area.y + border.top);
1198                         return;
1199                 }
1200         }
1201
1202         *page = -1;
1203 }
1204
1205 static gboolean
1206 location_in_text (EvView  *view,
1207                   gdouble  x,
1208                   gdouble  y)
1209 {
1210         GdkRegion *region;
1211         gint page = -1;
1212         gint x_offset = 0, y_offset = 0;
1213
1214         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1215
1216         if (page == -1)
1217                 return FALSE;
1218
1219         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1220
1221         if (region)
1222                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1223         else
1224                 return FALSE;
1225 }
1226
1227 static int
1228 ev_view_get_width (EvView *view)
1229 {
1230         return GTK_WIDGET (view)->allocation.width;
1231 }
1232
1233 static int
1234 ev_view_get_height (EvView *view)
1235 {
1236         return GTK_WIDGET (view)->allocation.height;
1237 }
1238
1239 static gboolean
1240 location_in_selected_text (EvView  *view,
1241                            gdouble  x,
1242                            gdouble  y)
1243 {
1244         gint page = -1;
1245         gint x_offset = 0, y_offset = 0;
1246         EvViewSelection *selection;
1247         GList *l = NULL;
1248
1249         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1250                 selection = (EvViewSelection *)l->data;
1251
1252                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1253
1254                 if (page != selection->page)
1255                         continue;
1256
1257                 if (selection->covered_region &&
1258                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1259                         return TRUE;
1260         }
1261
1262         return FALSE;
1263 }
1264
1265 static gboolean
1266 get_doc_point_from_offset (EvView *view,
1267                            gint    page,
1268                            gint    x_offset,
1269                            gint    y_offset,
1270                            gint   *x_new,
1271                            gint   *y_new)
1272 {
1273         gdouble width, height;
1274         double x, y;
1275
1276         get_doc_page_size (view, page, &width, &height);
1277
1278         x_offset = x_offset / view->scale;
1279         y_offset = y_offset / view->scale;
1280
1281         if (view->rotation == 0) {
1282                 x = x_offset;
1283                 y = y_offset;
1284         } else if (view->rotation == 90) {
1285                 x = y_offset;
1286                 y = width - x_offset;
1287         } else if (view->rotation == 180) {
1288                 x = width - x_offset;
1289                 y = height - y_offset;
1290         } else if (view->rotation == 270) {
1291                 x = height - y_offset;
1292                 y = x_offset;
1293         } else {
1294                 g_assert_not_reached ();
1295         }
1296
1297         *x_new = x;
1298         *y_new = y;
1299
1300         return TRUE;
1301 }
1302
1303 static gboolean
1304 get_doc_point_from_location (EvView  *view,
1305                              gdouble  x,
1306                              gdouble  y,
1307                              gint    *page,
1308                              gint    *x_new,
1309                              gint    *y_new)
1310 {
1311         gint x_offset = 0, y_offset = 0;
1312
1313         x += view->scroll_x;
1314         y += view->scroll_y;
1315         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1316         if (*page == -1)
1317                 return FALSE;
1318
1319         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1320 }
1321
1322 static void
1323 ev_view_get_area_from_mapping (EvView       *view,
1324                                guint         page,
1325                                GList        *mapping_list,
1326                                gconstpointer data,
1327                                GdkRectangle *area)
1328 {
1329         EvMapping *mapping;
1330
1331         mapping = ev_mapping_list_find (mapping_list, data);
1332         doc_rect_to_view_rect (view, page, &mapping->area, area);
1333         area->x -= view->scroll_x;
1334         area->y -= view->scroll_y;
1335 }
1336
1337
1338 /*** Hyperref ***/
1339 static EvLink *
1340 ev_view_get_link_at_location (EvView  *view,
1341                               gdouble  x,
1342                               gdouble  y)
1343 {
1344         gint page = -1;
1345         gint x_new = 0, y_new = 0;
1346         GList *link_mapping;
1347
1348         if (!EV_IS_DOCUMENT_LINKS (view->document))
1349                 return NULL;
1350
1351         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1352                 return NULL;
1353
1354         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1355
1356         if (link_mapping)
1357                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1358         else
1359                 return NULL;
1360 }
1361
1362 static void
1363 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1364 {
1365         EvPoint doc_point;
1366         gdouble zoom, left, top;
1367         gboolean change_left, change_top;
1368
1369         left = ev_link_dest_get_left (dest, &change_left);
1370         top = ev_link_dest_get_top (dest, &change_top);
1371
1372         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1373                                        ev_link_dest_get_bottom (dest) - top,
1374                                        ev_view_get_width (view),
1375                                        ev_view_get_height (view), 0, 0);
1376
1377         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1378         ev_view_set_zoom (view, zoom, FALSE);
1379
1380         doc_point.x = change_left ? left : 0;
1381         doc_point.y = change_top ? top : 0;
1382
1383         view->current_page = ev_link_dest_get_page (dest);
1384         if (change_left || change_top)
1385                 view->pending_point = doc_point;
1386         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1387
1388         gtk_widget_queue_resize (GTK_WIDGET (view));
1389 }
1390
1391 static void
1392 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1393 {
1394         EvPoint doc_point;
1395         gdouble doc_width, doc_height;
1396         gint page;
1397         double zoom, left;
1398         gboolean change_left;
1399
1400         page = ev_link_dest_get_page (dest);
1401         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1402
1403         left = ev_link_dest_get_left (dest, &change_left);
1404         doc_point.x = change_left ? left : 0;
1405         doc_point.y = 0;
1406
1407         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1408                                          ev_view_get_width (view),
1409                                          ev_view_get_height (view), 0);
1410
1411         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1412         ev_view_set_zoom (view, zoom, FALSE);
1413
1414         view->current_page = page;
1415         if (change_left)
1416                 view->pending_point = doc_point;
1417         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1418
1419         gtk_widget_queue_resize (GTK_WIDGET (view));
1420 }
1421
1422 static void
1423 goto_fith_dest (EvView *view, EvLinkDest *dest)
1424 {
1425         EvPoint doc_point;
1426         gdouble doc_width, doc_height;
1427         gint page;
1428         gdouble zoom, top;
1429         gboolean change_top;
1430
1431         page = ev_link_dest_get_page (dest);
1432         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1433
1434         top = ev_link_dest_get_top (dest, &change_top);
1435
1436         doc_point.x = 0;
1437         doc_point.y = change_top ? top : 0;
1438
1439         zoom = zoom_for_size_fit_width (doc_width, top,
1440                                         ev_view_get_width (view),
1441                                         ev_view_get_height (view), 0);
1442
1443         ev_view_set_sizing_mode (view, EV_SIZING_FIT_WIDTH);
1444         ev_view_set_zoom (view, zoom, FALSE);
1445
1446         view->current_page = page;
1447         if (change_top)
1448                 view->pending_point = doc_point;
1449         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1450
1451         gtk_widget_queue_resize (GTK_WIDGET (view));
1452 }
1453
1454 static void
1455 goto_fit_dest (EvView *view, EvLinkDest *dest)
1456 {
1457         double zoom;
1458         gdouble doc_width, doc_height;
1459         int page;
1460
1461         page = ev_link_dest_get_page (dest);
1462         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1463
1464         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1465                                        ev_view_get_height (view), 0, 0);
1466
1467         ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
1468         ev_view_set_zoom (view, zoom, FALSE);
1469
1470         view->current_page = page;
1471         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1472
1473         gtk_widget_queue_resize (GTK_WIDGET (view));
1474 }
1475
1476 static void
1477 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1478 {
1479         EvPoint doc_point;
1480         gint page;
1481         gdouble zoom, left, top;
1482         gboolean change_zoom, change_left, change_top;
1483
1484         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1485         page = ev_link_dest_get_page (dest);
1486
1487         if (change_zoom && zoom > 1) {
1488                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1489                 ev_view_set_zoom (view, zoom, FALSE);
1490         }
1491
1492         left = ev_link_dest_get_left (dest, &change_left);
1493         top = ev_link_dest_get_top (dest, &change_top);
1494
1495         doc_point.x = change_left ? left : 0;
1496         doc_point.y = change_top ? top : 0;
1497
1498         view->current_page = page;
1499         if (change_left || change_top)
1500                 view->pending_point = doc_point;
1501         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1502
1503         gtk_widget_queue_resize (GTK_WIDGET (view));
1504 }
1505
1506 static void
1507 goto_dest (EvView *view, EvLinkDest *dest)
1508 {
1509         EvLinkDestType type;
1510         int page, n_pages, current_page;
1511
1512         page = ev_link_dest_get_page (dest);
1513         n_pages = ev_document_get_n_pages (view->document);
1514
1515         if (page < 0 || page >= n_pages)
1516                 return;
1517
1518         current_page = view->current_page;
1519
1520         type = ev_link_dest_get_dest_type (dest);
1521
1522         switch (type) {
1523                 case EV_LINK_DEST_TYPE_PAGE:
1524                         ev_page_cache_set_current_page (view->page_cache, page);
1525                         break;
1526                 case EV_LINK_DEST_TYPE_FIT:
1527                         goto_fit_dest (view, dest);
1528                         break;
1529                 case EV_LINK_DEST_TYPE_FITH:
1530                         goto_fith_dest (view, dest);
1531                         break;
1532                 case EV_LINK_DEST_TYPE_FITV:
1533                         goto_fitv_dest (view, dest);
1534                         break;
1535                 case EV_LINK_DEST_TYPE_FITR:
1536                         goto_fitr_dest (view, dest);
1537                         break;
1538                 case EV_LINK_DEST_TYPE_XYZ:
1539                         goto_xyz_dest (view, dest);
1540                         break;
1541                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1542                         ev_page_cache_set_page_label (view->page_cache, ev_link_dest_get_page_label (dest));
1543                         break;
1544                 default:
1545                         g_assert_not_reached ();
1546         }
1547
1548         if (current_page != view->current_page)
1549                 ev_page_cache_set_current_page (view->page_cache,
1550                                                 view->current_page);
1551 }
1552
1553 static void
1554 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1555 {
1556         EvLinkDestType type;
1557
1558         type = ev_link_dest_get_dest_type (dest);
1559
1560         if (type == EV_LINK_DEST_TYPE_NAMED) {
1561                 EvLinkDest  *dest2;
1562                 const gchar *named_dest;
1563
1564                 named_dest = ev_link_dest_get_named_dest (dest);
1565                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1566                                                           named_dest);
1567                 if (dest2) {
1568                         goto_dest (view, dest2);
1569                         g_object_unref (dest2);
1570                 }
1571
1572                 return;
1573         }
1574
1575         goto_dest (view, dest);
1576 }
1577
1578 void
1579 ev_view_handle_link (EvView *view, EvLink *link)
1580 {
1581         EvLinkAction    *action = NULL;
1582         EvLinkActionType type;
1583
1584         action = ev_link_get_action (link);
1585         if (!action)
1586                 return;
1587
1588         type = ev_link_action_get_action_type (action);
1589
1590         switch (type) {
1591                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1592                         EvLinkDest *dest;
1593
1594                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1595
1596                         dest = ev_link_action_get_dest (action);
1597                         ev_view_goto_dest (view, dest);
1598                 }
1599                         break;
1600                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1601                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1602                 case EV_LINK_ACTION_TYPE_LAUNCH:
1603                 case EV_LINK_ACTION_TYPE_NAMED:
1604                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1605                         break;
1606         }
1607 }
1608
1609 gchar *
1610 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1611 {
1612         EvLinkDestType type;
1613         gchar *msg = NULL;
1614
1615         type = ev_link_dest_get_dest_type (dest);
1616
1617         switch (type) {
1618                 case EV_LINK_DEST_TYPE_NAMED: {
1619                         EvLinkDest  *dest2;
1620                         const gchar *named_dest;
1621
1622                         named_dest = ev_link_dest_get_named_dest (dest);
1623                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1624                                                                   named_dest);
1625                         if (dest2) {
1626                                 msg = ev_document_get_page_label (view->document,
1627                                                                   ev_link_dest_get_page (dest2));
1628                                 g_object_unref (dest2);
1629                         }
1630                 }
1631
1632                         break;
1633                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1634                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1635                 }
1636                         break;
1637                 default:
1638                         msg = ev_document_get_page_label (view->document,
1639                                                           ev_link_dest_get_page (dest));
1640         }
1641
1642         return msg;
1643 }
1644
1645 static char *
1646 tip_from_action_named (EvLinkAction *action)
1647 {
1648         const gchar *name = ev_link_action_get_name (action);
1649
1650         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1651                 return g_strdup (_("Go to first page"));
1652         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1653                 return g_strdup (_("Go to previous page"));
1654         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1655                 return g_strdup (_("Go to next page"));
1656         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1657                 return g_strdup (_("Go to last page"));
1658         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1659                 return g_strdup (_("Go to page"));
1660         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1661                 return g_strdup (_("Find"));
1662         }
1663
1664         return NULL;
1665 }
1666
1667 static char *
1668 tip_from_link (EvView *view, EvLink *link)
1669 {
1670         EvLinkAction *action;
1671         EvLinkActionType type;
1672         char *msg = NULL;
1673         char *page_label;
1674         const char *title;
1675
1676         action = ev_link_get_action (link);
1677         title = ev_link_get_title (link);
1678
1679         if (!action)
1680                 return title ? g_strdup (title) : NULL;
1681
1682         type = ev_link_action_get_action_type (action);
1683
1684         switch (type) {
1685                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1686                         page_label = ev_view_page_label_from_dest (view,
1687                                                                    ev_link_action_get_dest (action));
1688                         if (page_label) {
1689                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1690                                 g_free (page_label);
1691                         }
1692                         break;
1693                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1694                         if (title) {
1695                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1696                                                        ev_link_action_get_filename (action));
1697                         } else {
1698                                 msg = g_strdup_printf (_("Go to file “%s”"),
1699                                                        ev_link_action_get_filename (action));
1700                         }
1701                         break;
1702                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1703                         msg = g_strdup (ev_link_action_get_uri (action));
1704                         break;
1705                 case EV_LINK_ACTION_TYPE_LAUNCH:
1706                         msg = g_strdup_printf (_("Launch %s"),
1707                                                ev_link_action_get_filename (action));
1708                         break;
1709                 case EV_LINK_ACTION_TYPE_NAMED:
1710                         msg = tip_from_action_named (action);
1711                         break;
1712                 default:
1713                         if (title)
1714                                 msg = g_strdup (title);
1715                         break;
1716         }
1717
1718         return msg;
1719 }
1720
1721 static void
1722 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1723 {
1724         EvLink       *link;
1725         EvFormField  *field;
1726         EvAnnotation *annot = NULL;
1727
1728         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1729                 return;
1730
1731         if (view->drag_info.in_drag) {
1732                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1733                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1734                 return;
1735         }
1736
1737         if (view->scroll_info.autoscrolling) {
1738                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1739                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1740                 return;
1741         }
1742
1743         link = ev_view_get_link_at_location (view, x, y);
1744         if (link) {
1745                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1746         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1747                 if (field->is_read_only) {
1748                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1749                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1750                             view->cursor == EV_VIEW_CURSOR_DRAG)
1751                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1752                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1753                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1754                 } else {
1755                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1756                 }
1757         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1758                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1759         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1760                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1761         } else {
1762                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1763                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1764                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1765                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1766                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1767         }
1768
1769         if (link || annot)
1770                 g_object_set (view, "has-tooltip", TRUE, NULL);
1771 }
1772
1773 /*** Images ***/
1774 static EvImage *
1775 ev_view_get_image_at_location (EvView  *view,
1776                                gdouble  x,
1777                                gdouble  y)
1778 {
1779         gint page = -1;
1780         gint x_new = 0, y_new = 0;
1781         GList *image_mapping;
1782
1783         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1784                 return NULL;
1785
1786         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1787                 return NULL;
1788
1789         image_mapping = ev_pixbuf_cache_get_image_mapping (view->pixbuf_cache, page);
1790
1791         if (image_mapping)
1792                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1793         else
1794                 return NULL;
1795 }
1796
1797 /*** Forms ***/
1798 static EvFormField *
1799 ev_view_get_form_field_at_location (EvView  *view,
1800                                     gdouble  x,
1801                                     gdouble  y)
1802 {
1803         gint page = -1;
1804         gint x_new = 0, y_new = 0;
1805         GList *forms_mapping;
1806
1807         if (!EV_IS_DOCUMENT_FORMS (view->document))
1808                 return NULL;
1809
1810         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1811                 return NULL;
1812
1813         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, page);
1814
1815         if (forms_mapping)
1816                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1817         else
1818                 return NULL;
1819 }
1820
1821 static GdkRegion *
1822 ev_view_form_field_get_region (EvView      *view,
1823                                EvFormField *field)
1824 {
1825         GdkRectangle view_area;
1826         GList       *forms_mapping;
1827
1828         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1829                                                                 field->page->index);
1830         ev_view_get_area_from_mapping (view, field->page->index,
1831                                        forms_mapping,
1832                                        field, &view_area);
1833
1834         return gdk_region_rectangle (&view_area);
1835 }
1836
1837 static gboolean
1838 ev_view_forms_remove_widgets (EvView *view)
1839 {
1840         ev_view_remove_all (view);
1841
1842         return FALSE;
1843 }
1844
1845 static void
1846 ev_view_form_field_destroy (GtkWidget *widget,
1847                             EvView    *view)
1848 {
1849         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1850 }
1851
1852 static GtkWidget *
1853 ev_view_form_field_button_create_widget (EvView      *view,
1854                                          EvFormField *field)
1855 {
1856         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1857         GdkRegion         *field_region = NULL;
1858
1859         switch (field_button->type) {
1860                 case EV_FORM_FIELD_BUTTON_PUSH:
1861                         return NULL;
1862                 case EV_FORM_FIELD_BUTTON_CHECK:
1863                 case EV_FORM_FIELD_BUTTON_RADIO: {
1864                         gboolean  state;
1865                         GList    *forms_mapping, *l;
1866
1867                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1868                                                                                field);
1869
1870                         /* FIXME: it actually depends on NoToggleToOff flags */
1871                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1872                             state && field_button->state)
1873                                 return NULL;
1874
1875                         field_region = ev_view_form_field_get_region (view, field);
1876
1877                         /* For radio buttons and checkbox buttons that are in a set
1878                          * we need to update also the region for the current selected item
1879                          */
1880                         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1881                                                                                 field->page->index);
1882                         for (l = forms_mapping; l; l = g_list_next (l)) {
1883                                 EvFormField *button = ((EvMapping *)(l->data))->data;
1884                                 GdkRegion   *button_region;
1885
1886                                 if (button->id == field->id)
1887                                         continue;
1888
1889                                 /* FIXME: only buttons in the same group should be updated */
1890                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1891                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1892                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1893                                         continue;
1894
1895                                 button_region = ev_view_form_field_get_region (view, button);
1896                                 gdk_region_union (field_region, button_region);
1897                                 gdk_region_destroy (button_region);
1898                         }
1899
1900                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
1901                                                                        field, !state);
1902                         field_button->state = !state;
1903                 }
1904                         break;
1905         }
1906
1907         ev_view_reload_page (view, field->page->index, field_region);
1908         gdk_region_destroy (field_region);
1909
1910         return NULL;
1911 }
1912
1913 static void
1914 ev_view_form_field_text_save (EvView    *view,
1915                               GtkWidget *widget)
1916 {
1917         EvFormField *field;
1918
1919         if (!view->document)
1920                 return;
1921
1922         field = g_object_get_data (G_OBJECT (widget), "form-field");
1923
1924         if (field->changed) {
1925                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1926                 GdkRegion       *field_region;
1927
1928                 field_region = ev_view_form_field_get_region (view, field);
1929
1930                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
1931                                                             field, field_text->text);
1932                 field->changed = FALSE;
1933                 ev_view_reload_page (view, field->page->index, field_region);
1934                 gdk_region_destroy (field_region);
1935         }
1936 }
1937
1938 static void
1939 ev_view_form_field_text_changed (GtkWidget   *widget,
1940                                  EvFormField *field)
1941 {
1942         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1943         gchar           *text = NULL;
1944
1945         if (GTK_IS_ENTRY (widget)) {
1946                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
1947         } else if (GTK_IS_TEXT_BUFFER (widget)) {
1948                 GtkTextIter start, end;
1949
1950                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
1951                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
1952                                                  &start, &end, FALSE);
1953         }
1954
1955         if (!field_text->text ||
1956             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
1957                 g_free (field_text->text);
1958                 field_text->text = text;
1959                 field->changed = TRUE;
1960         }
1961 }
1962
1963 static GtkWidget *
1964 ev_view_form_field_text_create_widget (EvView      *view,
1965                                        EvFormField *field)
1966 {
1967         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1968         GtkWidget       *text = NULL;
1969         gchar           *txt;
1970
1971         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
1972                                                           field);
1973
1974         switch (field_text->type) {
1975                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
1976                         /* TODO */
1977                 case EV_FORM_FIELD_TEXT_NORMAL:
1978                         text = gtk_entry_new ();
1979                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
1980                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
1981                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
1982
1983                         if (txt) {
1984                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
1985                                 g_free (txt);
1986                         }
1987
1988                         g_signal_connect (text, "changed",
1989                                           G_CALLBACK (ev_view_form_field_text_changed),
1990                                           field);
1991                         g_signal_connect_after (text, "activate",
1992                                                 G_CALLBACK (ev_view_form_field_destroy),
1993                                                 view);
1994                         break;
1995                 case EV_FORM_FIELD_TEXT_MULTILINE: {
1996                         GtkTextBuffer *buffer;
1997
1998                         text = gtk_text_view_new ();
1999                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2000
2001                         if (txt) {
2002                                 gtk_text_buffer_set_text (buffer, txt, -1);
2003                                 g_free (txt);
2004                         }
2005
2006                         g_signal_connect (buffer, "changed",
2007                                           G_CALLBACK (ev_view_form_field_text_changed),
2008                                           field);
2009                 }
2010                         break;
2011         }
2012
2013         g_object_weak_ref (G_OBJECT (text),
2014                            (GWeakNotify)ev_view_form_field_text_save,
2015                            view);
2016
2017         return text;
2018 }
2019
2020 static void
2021 ev_view_form_field_choice_save (EvView    *view,
2022                                 GtkWidget *widget)
2023 {
2024         EvFormField *field;
2025
2026         if (!view->document)
2027                 return;
2028
2029         field = g_object_get_data (G_OBJECT (widget), "form-field");
2030
2031         if (field->changed) {
2032                 GList             *l;
2033                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2034                 GdkRegion         *field_region;
2035
2036                 field_region = ev_view_form_field_get_region (view, field);
2037
2038                 if (field_choice->is_editable) {
2039                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2040                                                                       field, field_choice->text);
2041                 } else {
2042                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2043                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2044                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2045                                                                                  field,
2046                                                                                  GPOINTER_TO_INT (l->data));
2047                         }
2048                 }
2049                 field->changed = FALSE;
2050                 ev_view_reload_page (view, field->page->index, field_region);
2051                 gdk_region_destroy (field_region);
2052         }
2053 }
2054
2055 static void
2056 ev_view_form_field_choice_changed (GtkWidget   *widget,
2057                                    EvFormField *field)
2058 {
2059         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2060
2061         if (GTK_IS_COMBO_BOX (widget)) {
2062                 gint item;
2063
2064                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2065                 if (!field_choice->selected_items ||
2066                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2067                         g_list_free (field_choice->selected_items);
2068                         field_choice->selected_items = NULL;
2069                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2070                                                                        GINT_TO_POINTER (item));
2071                         field->changed = TRUE;
2072                 }
2073
2074                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
2075                         gchar *text;
2076
2077                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
2078                         if (!field_choice->text ||
2079                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2080                                 g_free (field_choice->text);
2081                                 field_choice->text = text;
2082                                 field->changed = TRUE;
2083                         }
2084                 }
2085         } else if (GTK_IS_TREE_SELECTION (widget)) {
2086                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2087                 GtkTreeModel     *model;
2088                 GList            *items, *l;
2089
2090                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2091                 g_list_free (field_choice->selected_items);
2092                 field_choice->selected_items = NULL;
2093
2094                 for (l = items; l && l->data; l = g_list_next (l)) {
2095                         GtkTreeIter  iter;
2096                         GtkTreePath *path = (GtkTreePath *)l->data;
2097                         gint         item;
2098
2099                         gtk_tree_model_get_iter (model, &iter, path);
2100                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2101
2102                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2103                                                                        GINT_TO_POINTER (item));
2104
2105                         gtk_tree_path_free (path);
2106                 }
2107
2108                 g_list_free (items);
2109
2110                 field->changed = TRUE;
2111         }
2112 }
2113
2114 static GtkWidget *
2115 ev_view_form_field_choice_create_widget (EvView      *view,
2116                                          EvFormField *field)
2117 {
2118         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2119         GtkWidget         *choice;
2120         GtkTreeModel      *model;
2121         gint               n_items, i;
2122         gint               selected_item = 0;
2123
2124         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2125                                                                    field);
2126         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2127         for (i = 0; i < n_items; i++) {
2128                 GtkTreeIter iter;
2129                 gchar      *item;
2130
2131                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2132                                                                      field, i);
2133                 if (ev_document_forms_form_field_choice_is_item_selected (
2134                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2135                         selected_item = i;
2136                         /* FIXME: we need a get_selected_items function in poppler */
2137                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2138                                                                        GINT_TO_POINTER (i));
2139                 }
2140
2141                 if (item) {
2142                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2143                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2144                                             0, item,
2145                                             1, i,
2146                                             -1);
2147                         g_free (item);
2148                 }
2149         }
2150
2151         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2152                 GtkCellRenderer  *renderer;
2153                 GtkWidget        *tree_view;
2154                 GtkTreeSelection *selection;
2155
2156                 tree_view = gtk_tree_view_new_with_model (model);
2157                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2158
2159                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2160                 if (field_choice->multi_select) {
2161                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2162                 }
2163
2164                 /* TODO: set selected items */
2165
2166                 renderer = gtk_cell_renderer_text_new ();
2167                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2168                                                              0,
2169                                                              "choix", renderer,
2170                                                              "text", 0,
2171                                                              NULL);
2172
2173                 choice = gtk_scrolled_window_new (NULL, NULL);
2174                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2175                                                 GTK_POLICY_AUTOMATIC,
2176                                                 GTK_POLICY_AUTOMATIC);
2177                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2178                 gtk_widget_show (tree_view);
2179
2180                 g_signal_connect (selection, "changed",
2181                                   G_CALLBACK (ev_view_form_field_choice_changed),
2182                                   field);
2183                 g_signal_connect_after (selection, "changed",
2184                                         G_CALLBACK (ev_view_form_field_destroy),
2185                                         view);
2186         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2187                 gchar *text;
2188
2189                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2190                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2191                 if (text) {
2192                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2193                         g_free (text);
2194                 }
2195
2196                 g_signal_connect (choice, "changed",
2197                                   G_CALLBACK (ev_view_form_field_choice_changed),
2198                                   field);
2199                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
2200                                         G_CALLBACK (ev_view_form_field_destroy),
2201                                         view);
2202         } else { /* ComboBoxText */
2203                 GtkCellRenderer *renderer;
2204
2205                 choice = gtk_combo_box_new_with_model (model);
2206                 renderer = gtk_cell_renderer_text_new ();
2207                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2208                                             renderer, TRUE);
2209                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2210                                                 renderer,
2211                                                 "text", 0,
2212                                                 NULL);
2213                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2214                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2215
2216                 g_signal_connect (choice, "changed",
2217                                   G_CALLBACK (ev_view_form_field_choice_changed),
2218                                   field);
2219                 g_signal_connect_after (choice, "changed",
2220                                         G_CALLBACK (ev_view_form_field_destroy),
2221                                         view);
2222         }
2223
2224         g_object_unref (model);
2225
2226         g_object_weak_ref (G_OBJECT (choice),
2227                            (GWeakNotify)ev_view_form_field_choice_save,
2228                            view);
2229
2230         return choice;
2231 }
2232
2233 static void
2234 ev_view_handle_form_field (EvView      *view,
2235                            EvFormField *field,
2236                            gdouble      x,
2237                            gdouble      y)
2238 {
2239         GtkWidget   *field_widget = NULL;
2240         GList       *form_field_mapping;
2241         GdkRectangle view_area;
2242
2243         if (field->is_read_only)
2244                 return;
2245
2246         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2247                 field_widget = ev_view_form_field_button_create_widget (view, field);
2248         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2249                 field_widget = ev_view_form_field_text_create_widget (view, field);
2250         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2251                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2252         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2253                 /* TODO */
2254         }
2255
2256         /* Form field doesn't require a widget */
2257         if (!field_widget)
2258                 return;
2259
2260         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2261                                 g_object_ref (field),
2262                                 (GDestroyNotify)g_object_unref);
2263
2264         form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, field->page->index);
2265         ev_view_get_area_from_mapping (view, field->page->index,
2266                                        form_field_mapping,
2267                                        field, &view_area);
2268
2269         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2270         gtk_widget_show (field_widget);
2271         gtk_widget_grab_focus (field_widget);
2272 }
2273
2274 /* Annotations */
2275 static EvViewWindowChild *
2276 ev_view_get_window_child (EvView    *view,
2277                           GtkWidget *window)
2278 {
2279         GList *children = view->window_children;
2280
2281         while (children) {
2282                 EvViewWindowChild *child;
2283
2284                 child = (EvViewWindowChild *)children->data;
2285                 children = children->next;
2286
2287                 if (child->window == window)
2288                         return child;
2289         }
2290
2291         return NULL;
2292 }
2293
2294 static void
2295 ev_view_window_child_move (EvView            *view,
2296                            EvViewWindowChild *child,
2297                            gint               x,
2298                            gint               y)
2299 {
2300         child->x = x;
2301         child->y = y;
2302         gtk_window_move (GTK_WINDOW (child->window),
2303                          MAX (child->parent_x, x),
2304                          MAX (child->parent_y, y));
2305 }
2306
2307 static void
2308 ev_view_window_child_move_with_parent (EvView    *view,
2309                                        GtkWidget *window)
2310 {
2311         EvViewWindowChild *child;
2312         gint               root_x, root_y;
2313
2314         child = ev_view_get_window_child (view, window);
2315         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2316                                &root_x, &root_y);
2317         if (root_x != child->parent_x || root_y != child->parent_y) {
2318                 gint dest_x, dest_y;
2319
2320                 dest_x = child->x + (root_x - child->parent_x);
2321                 dest_y = child->y + (root_y - child->parent_y);
2322                 child->parent_x = root_x;
2323                 child->parent_y = root_y;
2324                 ev_view_window_child_move (view, child, dest_x, dest_y);
2325         }
2326
2327         if (child->visible && !GTK_WIDGET_VISIBLE (window))
2328                 gtk_widget_show (window);
2329 }
2330
2331 static void
2332 ev_view_window_child_put (EvView    *view,
2333                           GtkWidget *window,
2334                           guint      page,
2335                           gint       x,
2336                           gint       y,
2337                           gdouble    orig_x,
2338                           gdouble    orig_y)
2339 {
2340         EvViewWindowChild *child;
2341         gint               root_x, root_y;
2342
2343         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2344                                &root_x, &root_y);
2345
2346         child = g_new0 (EvViewWindowChild, 1);
2347         child->window = window;
2348         child->page = page;
2349         child->orig_x = orig_x;
2350         child->orig_y = orig_y;
2351         child->parent_x = root_x;
2352         child->parent_y = root_y;
2353         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2354         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2355
2356         if (child->visible)
2357                 gtk_widget_show (window);
2358         else
2359                 gtk_widget_hide (window);
2360
2361         view->window_children = g_list_append (view->window_children, child);
2362 }
2363
2364 static EvViewWindowChild *
2365 ev_view_find_window_child_for_annot (EvView       *view,
2366                                      guint         page,
2367                                      EvAnnotation *annot)
2368 {
2369         GList *children = view->window_children;
2370
2371         while (children) {
2372                 EvViewWindowChild *child;
2373                 EvAnnotation      *wannot;
2374
2375                 child = (EvViewWindowChild *)children->data;
2376                 children = children->next;
2377
2378                 if (child->page != page)
2379                         continue;
2380
2381                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2382                 if (wannot == annot || strcmp (wannot->name, annot->name) == 0)
2383                         return child;
2384         }
2385
2386         return NULL;
2387 }
2388
2389 static void
2390 ev_view_window_children_free (EvView *view)
2391 {
2392         GList *l;
2393
2394         if (!view->window_children)
2395                 return;
2396
2397         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2398                 EvViewWindowChild *child;
2399
2400                 child = (EvViewWindowChild *)l->data;
2401                 gtk_widget_destroy (GTK_WIDGET (child->window));
2402                 g_free (child);
2403         }
2404         g_list_free (view->window_children);
2405         view->window_children = NULL;
2406         view->window_child_focus = NULL;
2407 }
2408
2409 static void
2410 annotation_window_grab_focus (GtkWidget *widget,
2411                               EvView    *view)
2412 {
2413         if (view->window_child_focus)
2414                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2415         view->window_child_focus = ev_view_get_window_child (view, widget);
2416 }
2417
2418 static void
2419 annotation_window_closed (EvAnnotationWindow *window,
2420                           EvView             *view)
2421 {
2422         EvViewWindowChild *child;
2423
2424         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2425         child->visible = FALSE;
2426 }
2427
2428 static void
2429 annotation_window_moved (EvAnnotationWindow *window,
2430                          gint                x,
2431                          gint                y,
2432                          EvView             *view)
2433 {
2434         EvViewWindowChild *child;
2435         GdkRectangle       page_area;
2436         GtkBorder          border;
2437         GdkRectangle       view_rect;
2438         EvRectangle        doc_rect;
2439         gint               width, height;
2440
2441         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2442         if (child->x == x && child->y == y)
2443                 return;
2444
2445         child->moved = TRUE;
2446         child->x = x;
2447         child->y = y;
2448
2449         /* Window has been moved by the user,
2450          * we have to set a new origin in doc coords
2451          */
2452         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2453         view_rect.x = (x - child->parent_x) + view->scroll_x;
2454         view_rect.y = (y - child->parent_y) + view->scroll_y;
2455         view_rect.width = width;
2456         view_rect.height = height;
2457
2458         get_page_extents (view, child->page, &page_area, &border);
2459         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2460         child->orig_x = doc_rect.x1;
2461         child->orig_y = doc_rect.y1;
2462 }
2463
2464 static void
2465 ev_view_annotation_save (EvView       *view,
2466                          EvAnnotation *annot)
2467 {
2468         if (!view->document)
2469                 return;
2470
2471         if (!annot->changed)
2472                 return;
2473
2474         ev_document_annotations_annotation_set_contents (EV_DOCUMENT_ANNOTATIONS (view->document),
2475                                                          annot, annot->contents);
2476         annot->changed = FALSE;
2477 }
2478
2479 static void
2480 show_annotation_windows (EvView *view,
2481                          gint    page)
2482 {
2483         GList     *annots, *l;
2484         GtkWindow *parent;
2485
2486         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2487
2488         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2489
2490         for (l = annots; l && l->data; l = g_list_next (l)) {
2491                 EvAnnotation      *annot;
2492                 EvViewWindowChild *child;
2493                 GtkWidget         *window;
2494                 EvRectangle       *doc_rect;
2495                 GdkRectangle       view_rect;
2496
2497                 annot = ((EvMapping *)(l->data))->data;
2498
2499                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2500                         continue;
2501
2502                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2503                         continue;
2504
2505                 window = g_object_get_data (G_OBJECT (annot), "popup");
2506                 if (window) {
2507                         ev_view_window_child_move_with_parent (view, window);
2508                         continue;
2509                 }
2510
2511                 /* Look if we already have a popup for this annot */
2512                 child = ev_view_find_window_child_for_annot (view, page, annot);
2513                 window = child ? child->window : NULL;
2514                 if (window) {
2515                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2516                         g_object_set_data (G_OBJECT (annot), "popup", window);
2517                         ev_view_window_child_move_with_parent (view, window);
2518                 } else {
2519                         window = ev_annotation_window_new (annot, parent);
2520                         g_signal_connect (window, "grab_focus",
2521                                           G_CALLBACK (annotation_window_grab_focus),
2522                                           view);
2523                         g_signal_connect (window, "closed",
2524                                           G_CALLBACK (annotation_window_closed),
2525                                           view);
2526                         g_signal_connect (window, "moved",
2527                                           G_CALLBACK (annotation_window_moved),
2528                                           view);
2529                         g_object_set_data (G_OBJECT (annot), "popup", window);
2530
2531                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2532                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2533                         view_rect.x -= view->scroll_x;
2534                         view_rect.y -= view->scroll_y;
2535
2536                         ev_view_window_child_put (view, window, page,
2537                                                   view_rect.x, view_rect.y,
2538                                                   doc_rect->x1, doc_rect->y1);
2539
2540                         g_object_weak_ref (G_OBJECT (annot),
2541                                            (GWeakNotify)ev_view_annotation_save,
2542                                            view);
2543                 }
2544         }
2545 }
2546
2547 static void
2548 hide_annotation_windows (EvView *view,
2549                          gint    page)
2550 {
2551         GList *annots, *l;
2552
2553         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2554
2555         for (l = annots; l && l->data; l = g_list_next (l)) {
2556                 EvAnnotation *annot;
2557                 GtkWidget    *window;
2558
2559                 annot = ((EvMapping *)(l->data))->data;
2560
2561                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2562                         continue;
2563
2564                 window = g_object_get_data (G_OBJECT (annot), "popup");
2565                 if (window)
2566                         gtk_widget_hide (window);
2567         }
2568 }
2569
2570 static EvAnnotation *
2571 ev_view_get_annotation_at_location (EvView  *view,
2572                                     gdouble  x,
2573                                     gdouble  y)
2574 {
2575         gint page = -1;
2576         gint x_new = 0, y_new = 0;
2577         GList *annotations_mapping;
2578
2579         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2580                 return NULL;
2581
2582         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2583                 return NULL;
2584
2585         annotations_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2586
2587         if (annotations_mapping)
2588                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2589         else
2590                 return NULL;
2591 }
2592
2593 static void
2594 ev_view_handle_annotation (EvView       *view,
2595                            EvAnnotation *annot,
2596                            gdouble       x,
2597                            gdouble       y)
2598 {
2599         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2600                 GtkWidget *window;
2601
2602                 window = g_object_get_data (G_OBJECT (annot), "popup");
2603                 if (window) {
2604                         EvViewWindowChild *child;
2605
2606                         child = ev_view_get_window_child (view, window);
2607                         if (!child->visible) {
2608                                 child->visible = TRUE;
2609                                 ev_view_window_child_move (view, child, child->x, child->y);
2610                                 gtk_widget_show (window);
2611                         }
2612                 }
2613         }
2614 }
2615
2616 /*** GtkWidget implementation ***/
2617
2618 static void
2619 ev_view_size_request_continuous_dual_page (EvView         *view,
2620                                            GtkRequisition *requisition)
2621 {
2622         int max_width;
2623         gint n_pages;
2624         GtkBorder border;
2625
2626         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2627                                      view->scale, &max_width);
2628         compute_border (view, max_width, max_width, &border);
2629
2630         n_pages = ev_document_get_n_pages (view->document) + 1;
2631
2632         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2633         get_page_y_offset (view, n_pages, &requisition->height);
2634
2635         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2636                 requisition->width = 1;
2637         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2638                 requisition->width = 1;
2639                 /* FIXME: This could actually be set on one page docs or docs
2640                  * with a strange aspect ratio. */
2641                 /* requisition->height = 1;*/
2642         }
2643 }
2644
2645 static void
2646 ev_view_size_request_continuous (EvView         *view,
2647                                  GtkRequisition *requisition)
2648 {
2649         int max_width;
2650         int n_pages;
2651         GtkBorder border;
2652
2653
2654         ev_page_cache_get_max_width (view->page_cache, view->rotation,
2655                                      view->scale, &max_width);
2656         n_pages = ev_document_get_n_pages (view->document);
2657         compute_border (view, max_width, max_width, &border);
2658
2659         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2660         get_page_y_offset (view, n_pages, &requisition->height);
2661
2662         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2663                 requisition->width = 1;
2664         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2665                 requisition->width = 1;
2666                 /* FIXME: This could actually be set on one page docs or docs
2667                  * with a strange aspect ratio. */
2668                 /* requisition->height = 1;*/
2669         }
2670 }
2671
2672 static void
2673 ev_view_size_request_dual_page (EvView         *view,
2674                                 GtkRequisition *requisition)
2675 {
2676         GtkBorder border;
2677         gint width, height;
2678
2679         /* Find the largest of the two. */
2680         ev_page_cache_get_size (view->page_cache,
2681                                 view->current_page,
2682                                 view->rotation,
2683                                 view->scale,
2684                                 &width, &height);
2685         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
2686                 gint width_2, height_2;
2687                 ev_page_cache_get_size (view->page_cache,
2688                                         view->current_page + 1,
2689                                         view->rotation,
2690                                         view->scale,
2691                                         &width_2, &height_2);
2692                 if (width_2 > width) {
2693                         width = width_2;
2694                         height = height_2;
2695                 }
2696         }
2697         compute_border (view, width, height, &border);
2698
2699         requisition->width = ((width + border.left + border.right) * 2) +
2700                 (view->spacing * 3);
2701         requisition->height = (height + border.top + border.bottom) +
2702                 (view->spacing * 2);
2703
2704         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2705                 requisition->width = 1;
2706         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2707                 requisition->width = 1;
2708                 requisition->height = 1;
2709         }
2710 }
2711
2712 static void
2713 ev_view_size_request_single_page (EvView         *view,
2714                                   GtkRequisition *requisition)
2715 {
2716         GtkBorder border;
2717         gint width, height;
2718
2719         ev_page_cache_get_size (view->page_cache,
2720                                 view->current_page,
2721                                 view->rotation,
2722                                 view->scale,
2723                                 &width, &height);
2724         compute_border (view, width, height, &border);
2725
2726         requisition->width = width + border.left + border.right + (2 * view->spacing);
2727         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2728
2729         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2730                 requisition->width = 1;
2731                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2732         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2733                 requisition->width = 1;
2734                 requisition->height = 1;
2735         }
2736 }
2737
2738 static void
2739 ev_view_size_request (GtkWidget      *widget,
2740                       GtkRequisition *requisition)
2741 {
2742         EvView *view = EV_VIEW (widget);
2743
2744         if (view->document == NULL) {
2745                 requisition->width = 1;
2746                 requisition->height = 1;
2747                 return;
2748         }
2749
2750         if (view->presentation) {
2751                 requisition->width = 1;
2752                 requisition->height = 1;
2753                 return;
2754         }
2755
2756         if (view->continuous && view->dual_page)
2757                 ev_view_size_request_continuous_dual_page (view, requisition);
2758         else if (view->continuous)
2759                 ev_view_size_request_continuous (view, requisition);
2760         else if (view->dual_page)
2761                 ev_view_size_request_dual_page (view, requisition);
2762         else
2763                 ev_view_size_request_single_page (view, requisition);
2764 }
2765
2766 static void
2767 ev_view_size_allocate (GtkWidget      *widget,
2768                        GtkAllocation  *allocation)
2769 {
2770         EvView *view = EV_VIEW (widget);
2771         GList  *children, *l;
2772         gint    root_x, root_y;
2773
2774         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2775
2776         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2777             view->sizing_mode == EV_SIZING_BEST_FIT) {
2778                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
2779                 ev_view_size_request (widget, &widget->requisition);
2780         }
2781
2782         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2783         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2784
2785         if (view->document)
2786                 view_update_range_and_current_page (view);
2787
2788         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2789         view->pending_resize = FALSE;
2790
2791         children = gtk_container_get_children (GTK_CONTAINER (widget));
2792         for (l = children; l && l->data; l = g_list_next (l)) {
2793                 EvFormField   *field;
2794                 GdkRectangle   view_area;
2795                 GList         *form_field_mapping;
2796                 GtkAllocation  child_allocation;
2797                 GtkRequisition child_requisition;
2798                 GtkWidget     *child = (GtkWidget *)l->data;
2799
2800                 field = g_object_get_data (G_OBJECT (child), "form-field");
2801                 if (!field)
2802                         continue;
2803
2804                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2805                                                                              field->page->index);
2806                 ev_view_get_area_from_mapping (view, field->page->index,
2807                                                form_field_mapping,
2808                                                field, &view_area);
2809
2810                 gtk_widget_size_request (child, &child_requisition);
2811                 if (child_requisition.width != view_area.width ||
2812                     child_requisition.height != view_area.height)
2813                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2814
2815                 gtk_container_child_get (GTK_CONTAINER (widget),
2816                                          child,
2817                                          "x", &child_allocation.x,
2818                                          "y", &child_allocation.y,
2819                                          NULL);
2820                 if (child_allocation.x != view_area.x ||
2821                     child_allocation.y != view_area.y) {
2822                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2823                 }
2824         }
2825         g_list_free (children);
2826
2827         if (view->window_children)
2828                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2829                                        &root_x, &root_y);
2830
2831         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2832                 EvViewWindowChild *child;
2833                 EvRectangle        doc_rect;
2834                 GdkRectangle       view_rect;
2835
2836                 child = (EvViewWindowChild *)l->data;
2837
2838                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
2839                 if (child->moved) {
2840                         doc_rect.x1 = child->orig_x;
2841                         doc_rect.y1 = child->orig_y;
2842                 }
2843                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
2844                 view_rect.x -= view->scroll_x;
2845                 view_rect.y -= view->scroll_y;
2846
2847                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
2848                         child->parent_x = root_x;
2849                         child->parent_y = root_y;
2850                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
2851                 }
2852         }
2853 }
2854
2855 static void
2856 ev_view_realize (GtkWidget *widget)
2857 {
2858         EvView *view = EV_VIEW (widget);
2859
2860         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
2861                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
2862
2863         gdk_window_set_events (view->layout.bin_window,
2864                                (gdk_window_get_events (view->layout.bin_window) |
2865                                 GDK_EXPOSURE_MASK |
2866                                 GDK_BUTTON_PRESS_MASK |
2867                                 GDK_BUTTON_RELEASE_MASK |
2868                                 GDK_SCROLL_MASK |
2869                                 GDK_KEY_PRESS_MASK |
2870                                 GDK_POINTER_MOTION_MASK |
2871                                 GDK_POINTER_MOTION_HINT_MASK |
2872                                 GDK_ENTER_NOTIFY_MASK |
2873                                 GDK_LEAVE_NOTIFY_MASK));
2874
2875         if (view->presentation)
2876                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
2877         else
2878                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
2879 }
2880
2881 static gboolean
2882 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
2883 {
2884         EvView *view = EV_VIEW (widget);
2885         guint state;
2886
2887         state = event->state & gtk_accelerator_get_default_mod_mask ();
2888
2889         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
2890                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
2891
2892                 if (event->direction == GDK_SCROLL_UP ||
2893                     event->direction == GDK_SCROLL_LEFT) {
2894                         if (ev_view_can_zoom_in (view)) {
2895                                 ev_view_zoom_in (view);
2896                         }
2897                 } else {
2898                         if (ev_view_can_zoom_out (view)) {
2899                                 ev_view_zoom_out (view);
2900                         }
2901                 }
2902
2903                 return TRUE;
2904         }
2905
2906         view->jump_to_find_result = FALSE;
2907
2908         /* Shift+Wheel scrolls the in the perpendicular direction */
2909         if (state & GDK_SHIFT_MASK) {
2910                 if (event->direction == GDK_SCROLL_UP)
2911                         event->direction = GDK_SCROLL_LEFT;
2912                 else if (event->direction == GDK_SCROLL_LEFT)
2913                         event->direction = GDK_SCROLL_UP;
2914                 else if (event->direction == GDK_SCROLL_DOWN)
2915                         event->direction = GDK_SCROLL_RIGHT;
2916                 else if (event->direction == GDK_SCROLL_RIGHT)
2917                         event->direction = GDK_SCROLL_DOWN;
2918
2919                 event->state &= ~GDK_SHIFT_MASK;
2920                 state &= ~GDK_SHIFT_MASK;
2921         }
2922
2923         if (state == 0 &&
2924             (view->presentation ||
2925              (view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous))) {
2926                 switch (event->direction) {
2927                         case GDK_SCROLL_DOWN:
2928                         case GDK_SCROLL_RIGHT:
2929                                 ev_view_next_page (view);
2930                                 break;
2931                         case GDK_SCROLL_UP:
2932                         case GDK_SCROLL_LEFT:
2933                                 ev_view_previous_page (view);
2934                                 break;
2935                 }
2936
2937                 return TRUE;
2938         }
2939
2940         return FALSE;
2941 }
2942
2943 static EvViewSelection *
2944 find_selection_for_page (EvView *view,
2945                          gint    page)
2946 {
2947         GList *list;
2948
2949         for (list = view->selection_info.selections; list != NULL; list = list->next) {
2950                 EvViewSelection *selection;
2951
2952                 selection = (EvViewSelection *) list->data;
2953
2954                 if (selection->page == page)
2955                         return selection;
2956         }
2957
2958         return NULL;
2959 }
2960
2961 static void
2962 draw_end_presentation_page (EvView       *view,
2963                             GdkRectangle *page_area)
2964 {
2965         PangoLayout *layout;
2966         PangoFontDescription *font_desc;
2967         gchar *markup;
2968         const gchar *text = _("End of presentation. Press Escape to exit.");
2969
2970         if (view->presentation_state != EV_PRESENTATION_END)
2971                 return;
2972
2973         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
2974         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
2975         pango_layout_set_markup (layout, markup, -1);
2976         g_free (markup);
2977
2978         font_desc = pango_font_description_new ();
2979         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
2980         pango_layout_set_font_description (layout, font_desc);
2981
2982         gtk_paint_layout (GTK_WIDGET (view)->style,
2983                           view->layout.bin_window,
2984                           GTK_WIDGET_STATE (view),
2985                           FALSE,
2986                           page_area,
2987                           GTK_WIDGET (view),
2988                           NULL,
2989                           page_area->x + 15,
2990                           page_area->y + 15,
2991                           layout);
2992
2993         pango_font_description_free (font_desc);
2994         g_object_unref (layout);
2995 }
2996
2997 static gboolean
2998 ev_view_expose_event (GtkWidget      *widget,
2999                       GdkEventExpose *event)
3000 {
3001         EvView  *view = EV_VIEW (widget);
3002         cairo_t *cr;
3003         gint     i;
3004
3005         if (view->animation) {
3006                 if (ev_transition_animation_ready (view->animation)) {
3007                         GdkRectangle page_area;
3008                         GtkBorder    border;
3009
3010                         if (get_page_extents (view, view->current_page, &page_area, &border)) {
3011                                 cr = gdk_cairo_create (view->layout.bin_window);
3012
3013                                 /* normalize to x=0, y=0 */
3014                                 cairo_translate (cr, page_area.x, page_area.y);
3015                                 page_area.x = page_area.y = 0;
3016
3017                                 ev_transition_animation_paint (view->animation, cr, page_area);
3018                                 cairo_destroy (cr);
3019                         }
3020                 }
3021
3022                 return TRUE;
3023         }
3024
3025         if (view->presentation) {
3026                 switch (view->presentation_state) {
3027                         case EV_PRESENTATION_END: {
3028                                 GdkRectangle area = {0};
3029
3030                                 area.width = widget->allocation.width;
3031                                 area.height = widget->allocation.height;
3032
3033                                 draw_end_presentation_page (view, &area);
3034                         }
3035                                 return FALSE;
3036                         case EV_PRESENTATION_BLACK:
3037                         case EV_PRESENTATION_WHITE:
3038                                 return FALSE;
3039                         case EV_PRESENTATION_NORMAL:
3040                         default:
3041                                 break;
3042                 }
3043         } else if (view->loading) {
3044                 GdkRectangle area = {0};
3045
3046                 area.width = widget->allocation.width;
3047                 area.height = widget->allocation.height;
3048
3049                 draw_loading_text (view,
3050                                    &area,
3051                                    &(event->area));
3052         }
3053
3054         if (view->document == NULL)
3055                 return FALSE;
3056
3057         cr = gdk_cairo_create (view->layout.bin_window);
3058
3059         for (i = view->start_page; i <= view->end_page; i++) {
3060                 GdkRectangle page_area;
3061                 GtkBorder border;
3062                 gboolean page_ready = TRUE;
3063
3064                 if (!get_page_extents (view, i, &page_area, &border))
3065                         continue;
3066
3067                 page_area.x -= view->scroll_x;
3068                 page_area.y -= view->scroll_y;
3069
3070                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
3071
3072                 if (page_ready && view->find_pages && view->highlight_find_results)
3073                         highlight_find_results (view, i);
3074                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3075                         show_annotation_windows (view, i);
3076         }
3077
3078         cairo_destroy (cr);
3079
3080         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3081                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3082
3083         return FALSE;
3084 }
3085
3086 static gboolean
3087 ev_view_do_popup_menu (EvView *view,
3088                        gdouble x,
3089                        gdouble y)
3090 {
3091         EvLink  *link;
3092         EvImage *image;
3093
3094         image = ev_view_get_image_at_location (view, x, y);
3095         if (image) {
3096                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
3097                 return TRUE;
3098         }
3099
3100         link = ev_view_get_link_at_location (view, x, y);
3101         if (link) {
3102                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
3103                 return TRUE;
3104         }
3105
3106         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
3107
3108         return TRUE;
3109 }
3110
3111 static gboolean
3112 ev_view_popup_menu (GtkWidget *widget)
3113 {
3114         gint x, y;
3115
3116         gtk_widget_get_pointer (widget, &x, &y);
3117         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3118 }
3119
3120 static void
3121 get_link_area (EvView       *view,
3122                gint          x,
3123                gint          y,
3124                EvLink       *link,
3125                GdkRectangle *area)
3126 {
3127         GList *link_mapping;
3128         gint   page;
3129         gint   x_offset = 0, y_offset = 0;
3130
3131         x += view->scroll_x;
3132         y += view->scroll_y;
3133
3134         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3135
3136         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
3137         ev_view_get_area_from_mapping (view, page,
3138                                        link_mapping,
3139                                        link, area);
3140 }
3141
3142 static void
3143 get_annot_area (EvView       *view,
3144                gint          x,
3145                gint          y,
3146                EvAnnotation *annot,
3147                GdkRectangle *area)
3148 {
3149         GList *annots_mapping;
3150         gint   page;
3151         gint   x_offset = 0, y_offset = 0;
3152
3153         x += view->scroll_x;
3154         y += view->scroll_y;
3155
3156         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3157
3158         annots_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
3159         ev_view_get_area_from_mapping (view, page,
3160                                        annots_mapping,
3161                                        annot, area);
3162 }
3163
3164 static gboolean
3165 ev_view_query_tooltip (GtkWidget  *widget,
3166                        gint        x,
3167                        gint        y,
3168                        gboolean    keyboard_tip,
3169                        GtkTooltip *tooltip)
3170 {
3171         EvView       *view = EV_VIEW (widget);
3172         EvLink       *link;
3173         EvAnnotation *annot;
3174         gchar        *text;
3175
3176         annot = ev_view_get_annotation_at_location (view, x, y);
3177         if (annot && annot->contents) {
3178                 GdkRectangle annot_area;
3179
3180                 get_annot_area (view, x, y, annot, &annot_area);
3181                 gtk_tooltip_set_text (tooltip, annot->contents);
3182                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
3183
3184                 return TRUE;
3185         }
3186
3187         link = ev_view_get_link_at_location (view, x, y);
3188         if (!link)
3189                 return FALSE;
3190
3191         text = tip_from_link (view, link);
3192         if (text && g_utf8_validate (text, -1, NULL)) {
3193                 GdkRectangle link_area;
3194
3195                 get_link_area (view, x, y, link, &link_area);
3196                 gtk_tooltip_set_text (tooltip, text);
3197                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3198         }
3199         g_free (text);
3200
3201         return TRUE;
3202 }
3203
3204 static void
3205 start_selection_for_event (EvView         *view,
3206                            GdkEventButton *event)
3207 {
3208         clear_selection (view);
3209
3210         view->selection_info.start.x = event->x + view->scroll_x;
3211         view->selection_info.start.y = event->y + view->scroll_y;
3212
3213         switch (event->type) {
3214                 case GDK_2BUTTON_PRESS:
3215                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3216                         break;
3217                 case GDK_3BUTTON_PRESS:
3218                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3219                         break;
3220                 default:
3221                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3222                         return;
3223         }
3224
3225         /* In case of WORD or LINE, compute selections now */
3226         compute_selections (view,
3227                             view->selection_info.style,
3228                             &(view->selection_info.start),
3229                             &(view->selection_info.start));
3230 }
3231
3232 static gboolean
3233 ev_view_button_press_event (GtkWidget      *widget,
3234                             GdkEventButton *event)
3235 {
3236         EvView *view = EV_VIEW (widget);
3237
3238         if (!view->document)
3239                 return FALSE;
3240
3241         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3242                 gtk_widget_grab_focus (widget);
3243         }
3244
3245         if (view->window_child_focus) {
3246                 EvAnnotationWindow *window;
3247                 EvAnnotation       *annot;
3248
3249                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3250                 annot = ev_annotation_window_get_annotation (window);
3251                 ev_annotation_window_ungrab_focus (window);
3252                 ev_view_annotation_save (view, annot);
3253                 view->window_child_focus = NULL;
3254         }
3255
3256         view->pressed_button = event->button;
3257         view->selection_info.in_drag = FALSE;
3258
3259         if (view->scroll_info.autoscrolling)
3260                 return TRUE;
3261
3262         switch (event->button) {
3263                 case 1: {
3264                         EvImage *image;
3265                         EvAnnotation *annot;
3266                         EvFormField *field;
3267
3268                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3269                                 if (event->type == GDK_3BUTTON_PRESS) {
3270                                         start_selection_for_event (view, event);
3271                                 } else if (location_in_selected_text (view,
3272                                                                event->x + view->scroll_x,
3273                                                                event->y + view->scroll_y)) {
3274                                         view->selection_info.in_drag = TRUE;
3275                                 } else {
3276                                         start_selection_for_event (view, event);
3277                                 }
3278
3279                                 gtk_widget_queue_draw (widget);
3280                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3281                                 ev_view_handle_annotation (view, annot, event->x, event->y);
3282                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3283                                 ev_view_remove_all (view);
3284                                 ev_view_handle_form_field (view, field, event->x, event->y);
3285                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3286                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3287                                 if (view->image_dnd_info.image)
3288                                         g_object_unref (view->image_dnd_info.image);
3289                                 view->image_dnd_info.image = g_object_ref (image);
3290                                 view->image_dnd_info.in_drag = TRUE;
3291
3292                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3293                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3294                         } else {
3295                                 ev_view_remove_all (view);
3296
3297                                 if (EV_IS_SELECTION (view->document))
3298                                         start_selection_for_event (view, event);
3299                         }
3300                 }
3301                         return TRUE;
3302                 case 2:
3303                         /* use root coordinates as reference point because
3304                          * scrolling changes window relative coordinates */
3305                         view->drag_info.start.x = event->x_root;
3306                         view->drag_info.start.y = event->y_root;
3307                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3308                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3309
3310                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3311
3312                         return TRUE;
3313                 case 3:
3314                         view->scroll_info.start_y = event->y;
3315                         return ev_view_do_popup_menu (view, event->x, event->y);
3316         }
3317
3318         return FALSE;
3319 }
3320
3321 static void
3322 ev_view_remove_all (EvView *view)
3323 {
3324         GList *children, *child;
3325
3326         children = gtk_container_get_children (GTK_CONTAINER (view));
3327         for (child = children; child && child->data; child = g_list_next (child)) {
3328                 gtk_container_remove (GTK_CONTAINER (view),
3329                                       GTK_WIDGET (child->data));
3330         }
3331         g_list_free (children);
3332 }
3333
3334 /*** Drag and Drop ***/
3335 static void
3336 ev_view_drag_data_get (GtkWidget        *widget,
3337                        GdkDragContext   *context,
3338                        GtkSelectionData *selection_data,
3339                        guint             info,
3340                        guint             time)
3341 {
3342         EvView *view = EV_VIEW (widget);
3343
3344         switch (info) {
3345                 case TARGET_DND_TEXT:
3346                         if (EV_IS_SELECTION (view->document) &&
3347                             view->selection_info.selections) {
3348                                 gchar *text;
3349
3350                                 text = get_selected_text (view);
3351                                 gtk_selection_data_set_text (selection_data,
3352                                                              text,
3353                                                              strlen (text));
3354                                 g_free (text);
3355                         }
3356                         break;
3357                 case TARGET_DND_IMAGE:
3358                         if (view->image_dnd_info.image) {
3359                                 GdkPixbuf *pixbuf;
3360
3361                                 ev_document_doc_mutex_lock ();
3362                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3363                                                                        view->image_dnd_info.image);
3364                                 ev_document_doc_mutex_unlock ();
3365
3366                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3367                                 g_object_unref (pixbuf);
3368                         }
3369                         break;
3370                 case TARGET_DND_URI:
3371                         if (view->image_dnd_info.image) {
3372                                 GdkPixbuf   *pixbuf;
3373                                 const gchar *tmp_uri;
3374                                 gchar       *uris[2];
3375
3376                                 ev_document_doc_mutex_lock ();
3377                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3378                                                                        view->image_dnd_info.image);
3379                                 ev_document_doc_mutex_unlock ();
3380
3381                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3382                                 g_object_unref (pixbuf);
3383
3384                                 uris[0] = (gchar *)tmp_uri;
3385                                 uris[1] = NULL;
3386                                 gtk_selection_data_set_uris (selection_data, uris);
3387                         }
3388         }
3389 }
3390
3391 static gboolean
3392 ev_view_drag_motion (GtkWidget      *widget,
3393                      GdkDragContext *context,
3394                      gint            x,
3395                      gint            y,
3396                      guint           time)
3397 {
3398         if (gtk_drag_get_source_widget (context) == widget)
3399                 gdk_drag_status (context, 0, time);
3400         else
3401                 gdk_drag_status (context, context->suggested_action, time);
3402
3403         return TRUE;
3404 }
3405
3406 static gboolean
3407 selection_update_idle_cb (EvView *view)
3408 {
3409         compute_selections (view,
3410                             view->selection_info.style,
3411                             &view->selection_info.start,
3412                             &view->motion);
3413         view->selection_update_id = 0;
3414         return FALSE;
3415 }
3416
3417 static gboolean
3418 selection_scroll_timeout_cb (EvView *view)
3419 {
3420         gint x, y, shift = 0;
3421         GtkWidget *widget = GTK_WIDGET (view);
3422
3423         gtk_widget_get_pointer (widget, &x, &y);
3424
3425         if (y > widget->allocation.height) {
3426                 shift = (y - widget->allocation.height) / 2;
3427         } else if (y < 0) {
3428                 shift = y / 2;
3429         }
3430
3431         if (shift)
3432                 gtk_adjustment_set_value (view->vadjustment,
3433                                           CLAMP (view->vadjustment->value + shift,
3434                                           view->vadjustment->lower,
3435                                           view->vadjustment->upper -
3436                                           view->vadjustment->page_size));
3437
3438         if (x > widget->allocation.width) {
3439                 shift = (x - widget->allocation.width) / 2;
3440         } else if (x < 0) {
3441                 shift = x / 2;
3442         }
3443
3444         if (shift)
3445                 gtk_adjustment_set_value (view->hadjustment,
3446                                           CLAMP (view->hadjustment->value + shift,
3447                                           view->hadjustment->lower,
3448                                           view->hadjustment->upper -
3449                                           view->hadjustment->page_size));
3450
3451         return TRUE;
3452 }
3453
3454 static gboolean
3455 ev_view_drag_update_momentum (EvView *view)
3456 {
3457         int i;
3458         if (!view->drag_info.in_drag)
3459                 return FALSE;
3460
3461         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3462                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3463                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3464         }
3465
3466         /* Momentum is a moving average of 10ms granularity over
3467          * the last 100ms with each 10ms stored in buffer.
3468          */
3469
3470         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3471         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3472
3473         return TRUE;
3474 }
3475
3476 static gboolean
3477 ev_view_scroll_drag_release (EvView *view)
3478 {
3479         gdouble dhadj_value, dvadj_value;
3480         gdouble oldhadjustment, oldvadjustment;
3481
3482         view->drag_info.momentum.x /= 1.2;
3483         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3484
3485         dhadj_value = view->hadjustment->page_size *
3486                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
3487         dvadj_value = view->vadjustment->page_size *
3488                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
3489
3490         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3491         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3492
3493      /* When we reach the edges, we need either to absorb some momentum and bounce by
3494       * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3495      if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
3496            ((oldhadjustment + dhadj_value) < 0))
3497                 view->drag_info.momentum.x = 0;
3498         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
3499            ((oldvadjustment + dvadj_value) < 0))
3500                 view->drag_info.momentum.y = 0;
3501
3502         gtk_adjustment_set_value (view->hadjustment,
3503                                 MIN (oldhadjustment + dhadj_value,
3504                                 view->hadjustment->upper - view->hadjustment->page_size));
3505         gtk_adjustment_set_value (view->vadjustment,
3506                                 MIN (oldvadjustment + dvadj_value,
3507                                 view->vadjustment->upper - view->vadjustment->page_size));
3508
3509         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3510            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3511                 return FALSE;
3512         else
3513                 return TRUE;
3514 }
3515
3516 static gboolean
3517 ev_view_motion_notify_event (GtkWidget      *widget,
3518                              GdkEventMotion *event)
3519 {
3520         EvView *view = EV_VIEW (widget);
3521         gint x, y;
3522
3523         if (!view->document)
3524                 return FALSE;
3525
3526
3527         if (event->is_hint || event->window != view->layout.bin_window) {
3528             gtk_widget_get_pointer (widget, &x, &y);
3529         } else {
3530             x = event->x;
3531             y = event->y;
3532         }
3533
3534         if (view->scroll_info.autoscrolling) {
3535                 view->scroll_info.last_y = y;
3536                 return TRUE;
3537         }
3538
3539         if (view->selection_info.in_drag) {
3540                 if (gtk_drag_check_threshold (widget,
3541                                               view->selection_info.start.x,
3542                                               view->selection_info.start.y,
3543                                               x, y)) {
3544                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3545
3546                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3547
3548                         gtk_drag_begin (widget, target_list,
3549                                         GDK_ACTION_COPY,
3550                                         1, (GdkEvent *)event);
3551
3552                         view->selection_info.in_drag = FALSE;
3553
3554                         gtk_target_list_unref (target_list);
3555
3556                         return TRUE;
3557                 }
3558         } else if (view->image_dnd_info.in_drag) {
3559                 if (gtk_drag_check_threshold (widget,
3560                                               view->selection_info.start.x,
3561                                               view->selection_info.start.y,
3562                                               x, y)) {
3563                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3564
3565                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3566                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3567
3568                         gtk_drag_begin (widget, target_list,
3569                                         GDK_ACTION_COPY,
3570                                         1, (GdkEvent *)event);
3571
3572                         view->image_dnd_info.in_drag = FALSE;
3573
3574                         gtk_target_list_unref (target_list);
3575
3576                         return TRUE;
3577                 }
3578         }
3579
3580         switch (view->pressed_button) {
3581         case 1:
3582                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3583                  * documents only.
3584                  */
3585                 if (view->rotation != 0)
3586                         return FALSE;
3587
3588                 /* Schedule timeout to scroll during selection and additionally
3589                  * scroll once to allow arbitrary speed. */
3590                 if (!view->selection_scroll_id)
3591                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3592                                                                (GSourceFunc)selection_scroll_timeout_cb,
3593                                                                view);
3594                 else
3595                     selection_scroll_timeout_cb (view);
3596
3597                 view->selection_info.in_selection = TRUE;
3598                 view->motion.x = x + view->scroll_x;
3599                 view->motion.y = y + view->scroll_y;
3600
3601                 /* Queue an idle to handle the motion.  We do this because
3602                  * handling any selection events in the motion could be slower
3603                  * than new motion events reach us.  We always put it in the
3604                  * idle to make sure we catch up and don't visibly lag the
3605                  * mouse. */
3606                 if (!view->selection_update_id)
3607                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3608
3609                 return TRUE;
3610         case 2:
3611                 if (!view->drag_info.in_drag) {
3612                         gboolean start;
3613                         int i;
3614
3615                         start = gtk_drag_check_threshold (widget,
3616                                                           view->drag_info.start.x,
3617                                                           view->drag_info.start.y,
3618                                                           event->x_root,
3619                                                           event->y_root);
3620                         view->drag_info.in_drag = start;
3621                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3622                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3623                         /* Set 100 to choose how long it takes to build up momentum */
3624                         /* Clear out previous momentum info: */
3625                         for (i = 0; i < DRAG_HISTORY; i++) {
3626                                 view->drag_info.buffer[i].x = event->x;
3627                                 view->drag_info.buffer[i].y = event->y;
3628                         }
3629                         view->drag_info.momentum.x = 0;
3630                         view->drag_info.momentum.y = 0;
3631                 }
3632
3633                 if (view->drag_info.in_drag) {
3634                         int dx, dy;
3635                         gdouble dhadj_value, dvadj_value;
3636
3637                         view->drag_info.buffer[0].x = event->x;
3638                         view->drag_info.buffer[0].y = event->y;
3639
3640                         dx = event->x_root - view->drag_info.start.x;
3641                         dy = event->y_root - view->drag_info.start.y;
3642
3643                         dhadj_value = view->hadjustment->page_size *
3644                                       (gdouble)dx / widget->allocation.width;
3645                         dvadj_value = view->vadjustment->page_size *
3646                                       (gdouble)dy / widget->allocation.height;
3647
3648                         /* clamp scrolling to visible area */
3649                         gtk_adjustment_set_value (view->hadjustment,
3650                                                   MIN(view->drag_info.hadj - dhadj_value,
3651                                                       view->hadjustment->upper -
3652                                                       view->hadjustment->page_size));
3653                         gtk_adjustment_set_value (view->vadjustment,
3654                                                   MIN(view->drag_info.vadj - dvadj_value,
3655                                                       view->vadjustment->upper -
3656                                                       view->vadjustment->page_size));
3657
3658                         return TRUE;
3659                 }
3660
3661                 break;
3662         default:
3663                 ev_view_handle_cursor_over_xy (view, x, y);
3664         }
3665
3666         return FALSE;
3667 }
3668
3669 static gboolean
3670 ev_view_button_release_event (GtkWidget      *widget,
3671                               GdkEventButton *event)
3672 {
3673         EvView *view = EV_VIEW (widget);
3674         EvLink *link = NULL;
3675
3676         view->image_dnd_info.in_drag = FALSE;
3677
3678         if (view->scroll_info.autoscrolling) {
3679                 ev_view_autoscroll_stop (view);
3680                 view->pressed_button = -1;
3681
3682                 return TRUE;
3683         }
3684
3685         if (view->drag_info.in_drag) {
3686                 view->drag_info.release_timeout_id =
3687                         g_timeout_add (20,
3688                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3689         }
3690
3691         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3692                 link = ev_view_get_link_at_location (view, event->x, event->y);
3693         }
3694
3695         view->drag_info.in_drag = FALSE;
3696
3697         if (view->pressed_button == 2) {
3698                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3699         }
3700
3701         view->pressed_button = -1;
3702
3703         if (view->selection_scroll_id) {
3704             g_source_remove (view->selection_scroll_id);
3705             view->selection_scroll_id = 0;
3706         }
3707         if (view->selection_update_id) {
3708             g_source_remove (view->selection_update_id);
3709             view->selection_update_id = 0;
3710         }
3711
3712         if (view->selection_info.selections) {
3713                 clear_link_selected (view);
3714                 ev_view_update_primary_selection (view);
3715
3716                 if (view->selection_info.in_drag) {
3717                         clear_selection (view);
3718                         gtk_widget_queue_draw (widget);
3719                 }
3720
3721                 view->selection_info.in_drag = FALSE;
3722         } else if (link) {
3723                 if (event->button == 2) {
3724                         EvLinkAction    *action;
3725                         EvLinkActionType type;
3726
3727                         action = ev_link_get_action (link);
3728                         if (!action)
3729                                 return FALSE;
3730
3731                         type = ev_link_action_get_action_type (action);
3732                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3733                                 g_signal_emit (view,
3734                                                signals[SIGNAL_EXTERNAL_LINK],
3735                                                0, action);
3736                         }
3737                 } else {
3738                         ev_view_handle_link (view, link);
3739                 }
3740         } else if (view->presentation) {
3741                 switch (event->button) {
3742                         case 1:
3743                                 ev_view_next_page (view);
3744                                 return TRUE;
3745                         case 3:
3746                                 ev_view_previous_page (view);
3747                                 return TRUE;
3748                 }
3749         }
3750
3751         return FALSE;
3752 }
3753
3754 /* Goto Window */
3755 /* Cut and paste from gtkwindow.c */
3756 static void
3757 send_focus_change (GtkWidget *widget,
3758                    gboolean   in)
3759 {
3760         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3761
3762         g_object_ref (widget);
3763
3764         if (in)
3765                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3766         else
3767                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3768
3769         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3770         fevent->focus_change.window = g_object_ref (widget->window);
3771         fevent->focus_change.in = in;
3772
3773         gtk_widget_event (widget, fevent);
3774
3775         g_object_notify (G_OBJECT (widget), "has-focus");
3776
3777         g_object_unref (widget);
3778         gdk_event_free (fevent);
3779 }
3780
3781 static void
3782 ev_view_goto_window_hide (EvView *view)
3783 {
3784         /* send focus-in event */
3785         send_focus_change (view->goto_entry, FALSE);
3786         gtk_widget_hide (view->goto_window);
3787         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3788 }
3789
3790 static gboolean
3791 ev_view_goto_window_delete_event (GtkWidget   *widget,
3792                                   GdkEventAny *event,
3793                                   EvView      *view)
3794 {
3795         ev_view_goto_window_hide (view);
3796
3797         return TRUE;
3798 }
3799
3800 static gboolean
3801 key_is_numeric (guint keyval)
3802 {
3803         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3804                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3805 }
3806
3807 static gboolean
3808 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3809                                      GdkEventKey *event,
3810                                      EvView      *view)
3811 {
3812         switch (event->keyval) {
3813                 case GDK_Escape:
3814                 case GDK_Tab:
3815                 case GDK_KP_Tab:
3816                 case GDK_ISO_Left_Tab:
3817                         ev_view_goto_window_hide (view);
3818                         return TRUE;
3819                 case GDK_Return:
3820                 case GDK_KP_Enter:
3821                 case GDK_ISO_Enter:
3822                 case GDK_BackSpace:
3823                 case GDK_Delete:
3824                         return FALSE;
3825                 default:
3826                         if (!key_is_numeric (event->keyval))
3827                                 return TRUE;
3828         }
3829
3830         return FALSE;
3831 }
3832
3833 static gboolean
3834 ev_view_goto_window_button_press_event (GtkWidget      *widget,
3835                                         GdkEventButton *event,
3836                                         EvView         *view)
3837 {
3838         ev_view_goto_window_hide (view);
3839
3840         return TRUE;
3841 }
3842
3843 static void
3844 ev_view_goto_entry_activate (GtkEntry *entry,
3845                              EvView   *view)
3846 {
3847         const gchar *text;
3848         gint         page;
3849
3850         text = gtk_entry_get_text (entry);
3851         page = atoi (text) - 1;
3852
3853         ev_view_goto_window_hide (view);
3854
3855         if (page >= 0 && page < ev_document_get_n_pages (view->document))
3856                 ev_page_cache_set_current_page (view->page_cache, page);
3857 }
3858
3859 static void
3860 ev_view_goto_window_create (EvView *view)
3861 {
3862         GtkWidget *frame, *hbox, *toplevel, *label;
3863
3864         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
3865
3866         if (view->goto_window) {
3867                 if (GTK_WINDOW (toplevel)->group)
3868                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3869                                                      GTK_WINDOW (view->goto_window));
3870                 else if (GTK_WINDOW (view->goto_window)->group)
3871                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
3872                                                         GTK_WINDOW (view->goto_window));
3873                 return;
3874         }
3875
3876         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
3877         gtk_window_set_screen (GTK_WINDOW (view->goto_window),
3878                                gtk_widget_get_screen (GTK_WIDGET (view)));
3879
3880         if (GTK_WINDOW (toplevel)->group)
3881                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3882                                              GTK_WINDOW (view->goto_window));
3883
3884         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
3885
3886         g_signal_connect (view->goto_window, "delete_event",
3887                           G_CALLBACK (ev_view_goto_window_delete_event),
3888                           view);
3889         g_signal_connect (view->goto_window, "key_press_event",
3890                           G_CALLBACK (ev_view_goto_window_key_press_event),
3891                           view);
3892         g_signal_connect (view->goto_window, "button_press_event",
3893                           G_CALLBACK (ev_view_goto_window_button_press_event),
3894                           view);
3895
3896         frame = gtk_frame_new (NULL);
3897         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
3898         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
3899         gtk_widget_show (frame);
3900
3901         hbox = gtk_hbox_new (FALSE, 0);
3902         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
3903         gtk_container_add (GTK_CONTAINER (frame), hbox);
3904         gtk_widget_show (hbox);
3905
3906         label = gtk_label_new(_("Jump to page:"));
3907         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
3908         gtk_widget_show (label);
3909         gtk_widget_realize (label);
3910
3911         view->goto_entry = gtk_entry_new ();
3912         g_signal_connect (view->goto_entry, "activate",
3913                           G_CALLBACK (ev_view_goto_entry_activate),
3914                           view);
3915         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
3916         gtk_widget_show (view->goto_entry);
3917         gtk_widget_realize (view->goto_entry);
3918 }
3919
3920 static void
3921 ev_view_goto_entry_grab_focus (EvView *view)
3922 {
3923         GtkWidgetClass *entry_parent_class;
3924
3925         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
3926         (entry_parent_class->grab_focus) (view->goto_entry);
3927
3928         send_focus_change (view->goto_entry, TRUE);
3929 }
3930
3931 static void
3932 ev_view_goto_window_send_key_event (EvView   *view,
3933                                     GdkEvent *event)
3934 {
3935         GdkEventKey *new_event;
3936         GdkScreen   *screen;
3937
3938         /* Move goto window off screen */
3939         screen = gtk_widget_get_screen (GTK_WIDGET (view));
3940         gtk_window_move (GTK_WINDOW (view->goto_window),
3941                          gdk_screen_get_width (screen) + 1,
3942                          gdk_screen_get_height (screen) + 1);
3943         gtk_widget_show (view->goto_window);
3944
3945         new_event = (GdkEventKey *) gdk_event_copy (event);
3946         g_object_unref (new_event->window);
3947         new_event->window = g_object_ref (view->goto_window->window);
3948         gtk_widget_realize (view->goto_window);
3949
3950         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
3951         gdk_event_free ((GdkEvent *)new_event);
3952         gtk_widget_hide (view->goto_window);
3953 }
3954
3955 static gboolean
3956 ev_view_key_press_event (GtkWidget   *widget,
3957                          GdkEventKey *event)
3958 {
3959         EvView *view = EV_VIEW (widget);
3960         EvPresentationState current;
3961
3962         if (!view->document)
3963                 return FALSE;
3964
3965         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3966                 /* Forward key events to current focused window child */
3967                 if (view->window_child_focus) {
3968                         GdkEventKey *new_event;
3969                         gboolean     handled;
3970
3971                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
3972                         g_object_unref (new_event->window);
3973                         new_event->window = g_object_ref (view->window_child_focus->window->window);
3974                         gtk_widget_realize (view->window_child_focus->window);
3975                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
3976                         gdk_event_free ((GdkEvent *)new_event);
3977
3978                         return handled;
3979                 }
3980
3981                 return FALSE;
3982         }
3983
3984         if (!view->presentation ||
3985             view->presentation_state == EV_PRESENTATION_END)
3986                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3987
3988
3989         current = view->presentation_state;
3990
3991         switch (event->keyval) {
3992                 case GDK_b:
3993                 case GDK_B:
3994                 case GDK_period:
3995                 case GDK_KP_Decimal:
3996                         view->presentation_state =
3997                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
3998                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
3999                         break;
4000                 case GDK_w:
4001                 case GDK_W:
4002                         view->presentation_state =
4003                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
4004                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
4005                         break;
4006                 default:
4007                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
4008                             view->presentation_state == EV_PRESENTATION_WHITE) {
4009                                 view->presentation_state = EV_PRESENTATION_NORMAL;
4010                         }
4011         }
4012
4013         if (current == view->presentation_state) {
4014                 if (ev_document_get_n_pages (view->document) > 1 &&
4015                     key_is_numeric (event->keyval)) {
4016                         gint x, y;
4017
4018                         ev_view_goto_window_create (view);
4019                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
4020                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4021                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
4022                         gtk_widget_show (view->goto_window);
4023                         ev_view_goto_entry_grab_focus (view);
4024
4025                         return TRUE;
4026                 }
4027
4028                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4029         }
4030
4031         switch (view->presentation_state) {
4032                 case EV_PRESENTATION_NORMAL:
4033                 case EV_PRESENTATION_BLACK:
4034                         gdk_window_set_background (view->layout.bin_window,
4035                                                    &widget->style->black);
4036                         break;
4037                 case EV_PRESENTATION_WHITE:
4038                         gdk_window_set_background (view->layout.bin_window,
4039                                                    &widget->style->white);
4040                         break;
4041                 default:
4042                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4043         }
4044
4045         gtk_widget_queue_draw (widget);
4046         return TRUE;
4047 }
4048
4049 static gint
4050 ev_view_focus_in (GtkWidget     *widget,
4051                   GdkEventFocus *event)
4052 {
4053         if (EV_VIEW (widget)->pixbuf_cache)
4054                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4055         gtk_widget_queue_draw (widget);
4056
4057         return FALSE;
4058 }
4059
4060 static gint
4061 ev_view_focus_out (GtkWidget     *widget,
4062                      GdkEventFocus *event)
4063 {
4064         if (EV_VIEW (widget)->goto_window)
4065                 ev_view_goto_window_hide (EV_VIEW (widget));
4066
4067         if (EV_VIEW (widget)->pixbuf_cache)
4068                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4069         gtk_widget_queue_draw (widget);
4070
4071         return FALSE;
4072 }
4073
4074 static gboolean
4075 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4076 {
4077         EvView *view = EV_VIEW (widget);
4078
4079         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4080                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4081
4082         return FALSE;
4083 }
4084
4085 static gboolean
4086 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4087 {
4088         EvView *view = EV_VIEW (widget);
4089
4090         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4091
4092         return FALSE;
4093 }
4094
4095 static void
4096 ev_view_style_set (GtkWidget *widget,
4097                    GtkStyle  *old_style)
4098 {
4099         if (EV_VIEW (widget)->pixbuf_cache)
4100                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4101
4102         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
4103 }
4104
4105 /*** Drawing ***/
4106
4107 static guint32
4108 ev_gdk_color_to_rgb (const GdkColor *color)
4109 {
4110   guint32 result;
4111   result = (0xff0000 | (color->red & 0xff00));
4112   result <<= 8;
4113   result |= ((color->green & 0xff00) | (color->blue >> 8));
4114   return result;
4115 }
4116
4117 static void
4118 draw_rubberband (GtkWidget *widget, GdkWindow *window,
4119                  const GdkRectangle *rect, guchar alpha)
4120 {
4121         GdkGC *gc;
4122         GdkPixbuf *pixbuf;
4123         GdkColor *fill_color_gdk;
4124         guint fill_color;
4125
4126         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
4127         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
4128
4129         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
4130                                  rect->width, rect->height);
4131         gdk_pixbuf_fill (pixbuf, fill_color);
4132
4133         gdk_draw_pixbuf (window, NULL, pixbuf,
4134                          0, 0,
4135                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4136                          rect->width, rect->height,
4137                          GDK_RGB_DITHER_NONE,
4138                          0, 0);
4139
4140         g_object_unref (pixbuf);
4141
4142         gc = gdk_gc_new (window);
4143         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
4144         gdk_draw_rectangle (window, gc, FALSE,
4145                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4146                             rect->width - 1,
4147                             rect->height - 1);
4148         g_object_unref (gc);
4149
4150         gdk_color_free (fill_color_gdk);
4151 }
4152
4153
4154 static void
4155 highlight_find_results (EvView *view, int page)
4156 {
4157         gint i, n_results = 0;
4158
4159         n_results = ev_view_find_get_n_results (view, page);
4160
4161         for (i = 0; i < n_results; i++) {
4162                 EvRectangle *rectangle;
4163                 GdkRectangle view_rectangle;
4164                 guchar alpha;
4165
4166                 if (i == view->find_result && page == view->current_page) {
4167                         alpha = 0x90;
4168                 } else {
4169                         alpha = 0x20;
4170                 }
4171
4172                 rectangle = ev_view_find_get_result (view, page, i);
4173                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4174                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
4175                                  &view_rectangle, alpha);
4176         }
4177 }
4178
4179 static void
4180 draw_loading_text (EvView       *view,
4181                    GdkRectangle *page_area,
4182                    GdkRectangle *expose_area)
4183 {
4184         cairo_t *cr;
4185         gint     width, height;
4186
4187         if (!view->loading_text) {
4188                 const gchar *loading_text = _("Loading...");
4189                 PangoLayout *layout;
4190                 PangoFontDescription *font_desc;
4191                 PangoRectangle logical_rect;
4192                 gint target_width;
4193                 gdouble real_scale;
4194
4195                 ev_document_fc_mutex_lock ();
4196
4197                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
4198
4199                 font_desc = pango_font_description_new ();
4200
4201                 /* We set the font to be 10 points, get the size, and scale appropriately */
4202                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
4203                 pango_layout_set_font_description (layout, font_desc);
4204                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4205
4206                 target_width = MAX (page_area->width / 2, 1);
4207                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
4208                 pango_font_description_set_size (font_desc, (int)real_scale);
4209                 pango_layout_set_font_description (layout, font_desc);
4210                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4211
4212                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
4213                                                                  logical_rect.width,
4214                                                                  logical_rect.height);
4215                 cr = cairo_create (view->loading_text);
4216                 cairo_set_source_rgb (cr,
4217                                       155 / (double)255,
4218                                       155 / (double)255,
4219                                       155 / (double)255);
4220                 pango_cairo_show_layout (cr, layout);
4221                 cairo_destroy (cr);
4222
4223                 pango_font_description_free (font_desc);
4224                 g_object_unref (layout);
4225
4226                 ev_document_fc_mutex_unlock ();
4227         }
4228
4229         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
4230         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
4231
4232         cr = gdk_cairo_create (view->layout.bin_window);
4233         cairo_translate (cr,
4234                          page_area->x + width,
4235                          page_area->y + height);
4236         cairo_set_source_surface (cr, view->loading_text, 0, 0);
4237         cairo_paint (cr);
4238         cairo_destroy (cr);
4239 }
4240
4241 static void
4242 draw_one_page (EvView       *view,
4243                gint          page,
4244                cairo_t      *cr,
4245                GdkRectangle *page_area,
4246                GtkBorder    *border,
4247                GdkRectangle *expose_area,
4248                gboolean     *page_ready)
4249 {
4250         GdkRectangle overlap;
4251         GdkRectangle real_page_area;
4252
4253         g_assert (view->document);
4254
4255         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4256                 return;
4257
4258         /* Render the document itself */
4259         real_page_area = *page_area;
4260
4261         real_page_area.x += border->left;
4262         real_page_area.y += border->top;
4263         real_page_area.width -= (border->left + border->right);
4264         real_page_area.height -= (border->top + border->bottom);
4265         *page_ready = TRUE;
4266
4267         if (!view->presentation) {
4268                 gint current_page;
4269
4270                 current_page = ev_page_cache_get_current_page (view->page_cache);
4271                 ev_document_misc_paint_one_page (view->layout.bin_window,
4272                                                  GTK_WIDGET (view),
4273                                                  page_area, border,
4274                                                  page == current_page);
4275         }
4276
4277         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4278                 gint             width, height;
4279                 gint             page_width, page_height;
4280                 cairo_surface_t *page_surface = NULL;
4281                 gint             selection_width, selection_height;
4282                 cairo_surface_t *selection_surface = NULL;
4283
4284                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4285
4286                 if (!page_surface) {
4287                         if (!view->presentation) {
4288                                 draw_loading_text (view,
4289                                                    &real_page_area,
4290                                                    expose_area);
4291                         }
4292
4293                         *page_ready = FALSE;
4294
4295                         return;
4296                 }
4297
4298                 ev_page_cache_get_size (view->page_cache,
4299                                         page, view->rotation,
4300                                         view->scale,
4301                                         &width, &height);
4302
4303                 page_width = cairo_image_surface_get_width (page_surface);
4304                 page_height = cairo_image_surface_get_height (page_surface);
4305
4306                 cairo_save (cr);
4307                 cairo_translate (cr, overlap.x, overlap.y);
4308
4309                 if (width != page_width || height != page_height) {
4310                         cairo_pattern_set_filter (cairo_get_source (cr),
4311                                                   CAIRO_FILTER_FAST);
4312                         cairo_scale (cr,
4313                                      (gdouble)width / page_width,
4314                                      (gdouble)height / page_height);
4315                 }
4316
4317                 cairo_surface_set_device_offset (page_surface,
4318                                                  overlap.x - real_page_area.x,
4319                                                  overlap.y - real_page_area.y);
4320                 cairo_set_source_surface (cr, page_surface, 0, 0);
4321                 cairo_paint (cr);
4322                 cairo_restore (cr);
4323
4324                 /* Get the selection pixbuf iff we have something to draw */
4325                 if (find_selection_for_page (view, page) &&
4326                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4327                         selection_surface =
4328                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4329                                                                        page,
4330                                                                        view->scale,
4331                                                                        NULL);
4332                 }
4333
4334                 if (!selection_surface) {
4335                         return;
4336                 }
4337
4338                 selection_width = cairo_image_surface_get_width (selection_surface);
4339                 selection_height = cairo_image_surface_get_height (selection_surface);
4340
4341                 cairo_save (cr);
4342                 cairo_translate (cr, overlap.x, overlap.y);
4343
4344                 if (width != selection_width || height != selection_height) {
4345                         cairo_pattern_set_filter (cairo_get_source (cr),
4346                                                   CAIRO_FILTER_FAST);
4347                         cairo_scale (cr,
4348                                      (gdouble)width / selection_width,
4349                                      (gdouble)height / selection_height);
4350                 }
4351
4352                 cairo_surface_set_device_offset (selection_surface,
4353                                                  overlap.x - real_page_area.x,
4354                                                  overlap.y - real_page_area.y);
4355                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4356                 cairo_paint (cr);
4357                 cairo_restore (cr);
4358         }
4359 }
4360
4361 /*** GObject functions ***/
4362
4363 static void
4364 ev_view_finalize (GObject *object)
4365 {
4366         EvView *view = EV_VIEW (object);
4367
4368         clear_selection (view);
4369         clear_link_selected (view);
4370
4371         if (view->image_dnd_info.image)
4372                 g_object_unref (view->image_dnd_info.image);
4373         view->image_dnd_info.image = NULL;
4374
4375         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4376 }
4377
4378 static void
4379 ev_view_destroy (GtkObject *object)
4380 {
4381         EvView *view = EV_VIEW (object);
4382
4383         if (view->document) {
4384                 g_object_unref (view->document);
4385                 view->document = NULL;
4386         }
4387
4388         if (view->pixbuf_cache) {
4389                 g_object_unref (view->pixbuf_cache);
4390                 view->pixbuf_cache = NULL;
4391         }
4392
4393         if (view->goto_window) {
4394                 gtk_widget_destroy (view->goto_window);
4395                 view->goto_window = NULL;
4396                 view->goto_entry = NULL;
4397         }
4398
4399         ev_view_window_children_free (view);
4400
4401         if (view->selection_scroll_id) {
4402             g_source_remove (view->selection_scroll_id);
4403             view->selection_scroll_id = 0;
4404         }
4405
4406         if (view->selection_update_id) {
4407             g_source_remove (view->selection_update_id);
4408             view->selection_update_id = 0;
4409         }
4410
4411         if (view->loading_text) {
4412                 cairo_surface_destroy (view->loading_text);
4413                 view->loading_text = NULL;
4414         }
4415
4416         if (view->scroll_info.timeout_id) {
4417             g_source_remove (view->scroll_info.timeout_id);
4418             view->scroll_info.timeout_id = 0;
4419         }
4420
4421         if (view->drag_info.drag_timeout_id) {
4422                 g_source_remove (view->drag_info.drag_timeout_id);
4423                 view->drag_info.drag_timeout_id = 0;
4424         }
4425
4426         if (view->drag_info.release_timeout_id) {
4427                 g_source_remove (view->drag_info.release_timeout_id);
4428                 view->drag_info.release_timeout_id = 0;
4429         }
4430
4431         ev_view_presentation_transition_stop (view);
4432
4433         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4434
4435         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4436 }
4437
4438 static void
4439 ev_view_set_property (GObject      *object,
4440                       guint         prop_id,
4441                       const GValue *value,
4442                       GParamSpec   *pspec)
4443 {
4444         EvView *view = EV_VIEW (object);
4445
4446         switch (prop_id) {
4447                 case PROP_CONTINUOUS:
4448                         ev_view_set_continuous (view, g_value_get_boolean (value));
4449                         break;
4450                 case PROP_DUAL_PAGE:
4451                         ev_view_set_dual_page (view, g_value_get_boolean (value));
4452                         break;
4453                 case PROP_FULLSCREEN:
4454                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
4455                         break;
4456                 case PROP_PRESENTATION:
4457                         ev_view_set_presentation (view, g_value_get_boolean (value));
4458                         break;
4459                 case PROP_SIZING_MODE:
4460                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
4461                         break;
4462                 case PROP_ZOOM:
4463                         ev_view_set_zoom (view, g_value_get_double (value), FALSE);
4464                         break;
4465                 case PROP_ROTATION:
4466                         ev_view_set_rotation (view, g_value_get_int (value));
4467                         break;
4468                 default:
4469                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4470         }
4471 }
4472
4473 static AtkObject *
4474 ev_view_get_accessible (GtkWidget *widget)
4475 {
4476         static gboolean first_time = TRUE;
4477
4478         if (first_time) {
4479                 AtkObjectFactory *factory;
4480                 AtkRegistry *registry;
4481                 GType derived_type;
4482                 GType derived_atk_type;
4483
4484                 /*
4485                  * Figure out whether accessibility is enabled by looking at the
4486                  * type of the accessible object which would be created for
4487                  * the parent type of EvView.
4488                  */
4489                 derived_type = g_type_parent (EV_TYPE_VIEW);
4490
4491                 registry = atk_get_default_registry ();
4492                 factory = atk_registry_get_factory (registry,
4493                                                     derived_type);
4494                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4495                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4496                         atk_registry_set_factory_type (registry,
4497                                                        EV_TYPE_VIEW,
4498                                                        ev_view_accessible_factory_get_type ());
4499                 first_time = FALSE;
4500         }
4501         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4502 }
4503
4504 static void
4505 ev_view_get_property (GObject *object,
4506                       guint prop_id,
4507                       GValue *value,
4508                       GParamSpec *pspec)
4509 {
4510         EvView *view = EV_VIEW (object);
4511
4512         switch (prop_id) {
4513                 case PROP_CONTINUOUS:
4514                         g_value_set_boolean (value, view->continuous);
4515                         break;
4516                 case PROP_DUAL_PAGE:
4517                         g_value_set_boolean (value, view->dual_page);
4518                         break;
4519                 case PROP_FULLSCREEN:
4520                         g_value_set_boolean (value, view->fullscreen);
4521                         break;
4522                 case PROP_PRESENTATION:
4523                         g_value_set_boolean (value, view->presentation);
4524                         break;
4525                 case PROP_SIZING_MODE:
4526                         g_value_set_enum (value, view->sizing_mode);
4527                         break;
4528                 case PROP_ZOOM:
4529                         g_value_set_double (value, view->scale);
4530                         break;
4531                 case PROP_ROTATION:
4532                         g_value_set_int (value, view->rotation);
4533                         break;
4534                 case PROP_HAS_SELECTION:
4535                         g_value_set_boolean (value,
4536                                              view->selection_info.selections != NULL);
4537                         break;
4538                 default:
4539                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4540         }
4541 }
4542
4543 static void
4544 ev_view_class_init (EvViewClass *class)
4545 {
4546         GObjectClass *object_class = G_OBJECT_CLASS (class);
4547         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4548         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4549         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4550         GtkBindingSet *binding_set;
4551
4552         object_class->finalize = ev_view_finalize;
4553         object_class->set_property = ev_view_set_property;
4554         object_class->get_property = ev_view_get_property;
4555
4556         widget_class->expose_event = ev_view_expose_event;
4557         widget_class->button_press_event = ev_view_button_press_event;
4558         widget_class->motion_notify_event = ev_view_motion_notify_event;
4559         widget_class->button_release_event = ev_view_button_release_event;
4560         widget_class->key_press_event = ev_view_key_press_event;
4561         widget_class->focus_in_event = ev_view_focus_in;
4562         widget_class->focus_out_event = ev_view_focus_out;
4563         widget_class->get_accessible = ev_view_get_accessible;
4564         widget_class->size_request = ev_view_size_request;
4565         widget_class->size_allocate = ev_view_size_allocate;
4566         widget_class->realize = ev_view_realize;
4567         widget_class->scroll_event = ev_view_scroll_event;
4568         widget_class->enter_notify_event = ev_view_enter_notify_event;
4569         widget_class->leave_notify_event = ev_view_leave_notify_event;
4570         widget_class->style_set = ev_view_style_set;
4571         widget_class->drag_data_get = ev_view_drag_data_get;
4572         widget_class->drag_motion = ev_view_drag_motion;
4573         widget_class->popup_menu = ev_view_popup_menu;
4574         widget_class->query_tooltip = ev_view_query_tooltip;
4575
4576         gtk_object_class->destroy = ev_view_destroy;
4577
4578         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4579
4580         class->binding_activated = ev_view_scroll;
4581
4582         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4583                          G_TYPE_FROM_CLASS (object_class),
4584                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4585                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4586                          NULL, NULL,
4587                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4588                          G_TYPE_NONE, 2,
4589                          GTK_TYPE_SCROLL_TYPE,
4590                          G_TYPE_BOOLEAN);
4591
4592         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
4593                          G_TYPE_FROM_CLASS (object_class),
4594                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4595                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
4596                          NULL, NULL,
4597                          g_cclosure_marshal_VOID__VOID,
4598                          G_TYPE_NONE, 0, G_TYPE_NONE);
4599         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4600                          G_TYPE_FROM_CLASS (object_class),
4601                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4602                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4603                          NULL, NULL,
4604                          g_cclosure_marshal_VOID__OBJECT,
4605                          G_TYPE_NONE, 1,
4606                          G_TYPE_OBJECT);
4607         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4608                          G_TYPE_FROM_CLASS (object_class),
4609                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4610                          G_STRUCT_OFFSET (EvViewClass, external_link),
4611                          NULL, NULL,
4612                          g_cclosure_marshal_VOID__OBJECT,
4613                          G_TYPE_NONE, 1,
4614                          G_TYPE_OBJECT);
4615         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4616                          G_TYPE_FROM_CLASS (object_class),
4617                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4618                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4619                          NULL, NULL,
4620                          g_cclosure_marshal_VOID__OBJECT,
4621                          G_TYPE_NONE, 1,
4622                          G_TYPE_OBJECT);
4623
4624
4625         g_object_class_install_property (object_class,
4626                                          PROP_CONTINUOUS,
4627                                          g_param_spec_boolean ("continuous",
4628                                                                "Continuous",
4629                                                                "Continuous scrolling mode",
4630                                                                TRUE,
4631                                                                G_PARAM_READWRITE));
4632
4633         g_object_class_install_property (object_class,
4634                                          PROP_DUAL_PAGE,
4635                                          g_param_spec_boolean ("dual-page",
4636                                                                "Dual Page",
4637                                                                "Two pages visible at once",
4638                                                                FALSE,
4639                                                                G_PARAM_READWRITE));
4640         g_object_class_install_property (object_class,
4641                                          PROP_FULLSCREEN,
4642                                          g_param_spec_boolean ("fullscreen",
4643                                                                "Full Screen",
4644                                                                "Draw page in a fullscreen fashion",
4645                                                                FALSE,
4646                                                                G_PARAM_READWRITE));
4647         g_object_class_install_property (object_class,
4648                                          PROP_PRESENTATION,
4649                                          g_param_spec_boolean ("presentation",
4650                                                                "Presentation",
4651                                                                "Draw page in presentation mode",
4652                                                                TRUE,
4653                                                                G_PARAM_READWRITE));
4654
4655         g_object_class_install_property (object_class,
4656                                          PROP_SIZING_MODE,
4657                                          g_param_spec_enum ("sizing-mode",
4658                                                             "Sizing Mode",
4659                                                             "Sizing Mode",
4660                                                             EV_TYPE_SIZING_MODE,
4661                                                             EV_SIZING_FIT_WIDTH,
4662                                                             G_PARAM_READWRITE));
4663
4664         g_object_class_install_property (object_class,
4665                                          PROP_ZOOM,
4666                                          g_param_spec_double ("zoom",
4667                                                               "Zoom factor",
4668                                                               "Zoom factor",
4669                                                               0,
4670                                                               G_MAXDOUBLE,
4671                                                               1.0,
4672                                                               G_PARAM_READWRITE));
4673         g_object_class_install_property (object_class,
4674                                          PROP_ROTATION,
4675                                          g_param_spec_double ("rotation",
4676                                                               "Rotation",
4677                                                               "Rotation",
4678                                                               0,
4679                                                               360,
4680                                                               0,
4681                                                               G_PARAM_READWRITE));
4682         g_object_class_install_property (object_class,
4683                                          PROP_HAS_SELECTION,
4684                                          g_param_spec_boolean ("has-selection",
4685                                                                "Has selection",
4686                                                                "The view has selections",
4687                                                                FALSE,
4688                                                                G_PARAM_READABLE));
4689
4690         binding_set = gtk_binding_set_by_class (class);
4691
4692         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4693         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4694         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4695         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4696         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4697         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4698         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4699         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4700         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4701                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4702         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4703                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4704         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4705                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4706         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4707                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4708
4709 }
4710
4711 static void
4712 ev_view_init (EvView *view)
4713 {
4714         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4715
4716         view->start_page = -1;
4717         view->end_page = -1;
4718         view->spacing = 5;
4719         view->scale = 1.0;
4720         view->current_page = 0;
4721         view->pressed_button = -1;
4722         view->cursor = EV_VIEW_CURSOR_NORMAL;
4723         view->drag_info.in_drag = FALSE;
4724         view->scroll_info.autoscrolling = FALSE;
4725         view->selection_info.selections = NULL;
4726         view->selection_info.in_selection = FALSE;
4727         view->selection_info.in_drag = FALSE;
4728         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4729         view->continuous = TRUE;
4730         view->dual_page = FALSE;
4731         view->presentation = FALSE;
4732         view->presentation_state = EV_PRESENTATION_NORMAL;
4733         view->fullscreen = FALSE;
4734         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4735         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4736         view->jump_to_find_result = TRUE;
4737         view->highlight_find_results = FALSE;
4738
4739         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4740         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4741 }
4742
4743 /*** Callbacks ***/
4744
4745 static void
4746 ev_view_change_page (EvView *view,
4747                      gint    new_page,
4748                      gboolean start_transition)
4749 {
4750         gint x, y;
4751
4752         view->current_page = new_page;
4753         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4754
4755         if (view->presentation && start_transition)
4756                 ev_view_presentation_transition_start (view);
4757
4758         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4759         ev_view_handle_cursor_over_xy (view, x, y);
4760
4761         gtk_widget_queue_resize (GTK_WIDGET (view));
4762 }
4763
4764 static void
4765 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4766                                      EvView                *view)
4767 {
4768         g_object_unref (view->animation);
4769         view->animation = NULL;
4770         ev_view_change_page (view, view->current_page, TRUE);
4771 }
4772
4773 /**
4774  * ev_view_transition_animation_cancel:
4775  * @animation: Animation to finish
4776  * @view: An EvView
4777  *
4778  * Does almost the same as cancel, but without scheduling the transition.
4779  */
4780
4781 static void
4782 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4783                                      EvView                *view)
4784 {
4785         g_object_unref (view->animation);
4786         view->animation = NULL;
4787         ev_view_change_page (view, view->current_page, FALSE);
4788 }
4789
4790 static void
4791 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4792                                     gdouble                progress,
4793                                     EvView                *view)
4794 {
4795         gtk_widget_queue_draw (GTK_WIDGET (view));
4796 }
4797
4798 static void
4799 ev_view_presentation_animation_start (EvView *view,
4800                                       int     new_page)
4801 {
4802         EvTransitionEffect *effect = NULL;
4803         cairo_surface_t *surface;
4804
4805         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4806                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4807                                                             view->current_page);
4808         if (!effect)
4809                 return;
4810
4811         view->animation = ev_transition_animation_new (effect);
4812
4813         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4814         ev_transition_animation_set_origin_surface (view->animation, surface);
4815         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, new_page);
4816         if (surface)
4817                 ev_transition_animation_set_dest_surface (view->animation, surface);
4818
4819         g_signal_connect (view->animation, "frame",
4820                           G_CALLBACK (ev_view_transition_animation_frame), view);
4821         g_signal_connect (view->animation, "finished",
4822                           G_CALLBACK (ev_view_transition_animation_finish), view);
4823 }
4824
4825 static void
4826 job_finished_cb (EvPixbufCache *pixbuf_cache,
4827                  GdkRegion     *region,
4828                  EvView        *view)
4829 {
4830         if (view->animation) {
4831                 cairo_surface_t *surface;
4832
4833                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4834                 ev_transition_animation_set_dest_surface (view->animation, surface);
4835         }
4836
4837         if (region) {
4838                 gdk_window_invalidate_region (view->layout.bin_window,
4839                                               region, TRUE);
4840         } else {
4841                 gtk_widget_queue_draw (GTK_WIDGET (view));
4842         }
4843 }
4844
4845 static void
4846 page_changed_cb (EvPageCache *page_cache,
4847                  int          new_page,
4848                  EvView      *view)
4849 {
4850         if (view->current_page != new_page) {
4851                 if (view->presentation)
4852                         ev_view_presentation_animation_start (view, new_page);
4853
4854                 ev_view_change_page (view, new_page, TRUE);
4855         } else {
4856                 gtk_widget_queue_draw (GTK_WIDGET (view));
4857         }
4858
4859         view->find_result = 0;
4860 }
4861
4862 static void
4863 on_adjustment_value_changed (GtkAdjustment *adjustment,
4864                              EvView        *view)
4865 {
4866         int dx = 0, dy = 0;
4867         gint x, y;
4868         GList *children, *l;
4869
4870         if (! GTK_WIDGET_REALIZED (view))
4871                 return;
4872
4873         if (view->hadjustment) {
4874                 dx = view->scroll_x - (int) view->hadjustment->value;
4875                 view->scroll_x = (int) view->hadjustment->value;
4876         } else {
4877                 view->scroll_x = 0;
4878         }
4879
4880         if (view->vadjustment) {
4881                 dy = view->scroll_y - (int) view->vadjustment->value;
4882                 view->scroll_y = (int) view->vadjustment->value;
4883         } else {
4884                 view->scroll_y = 0;
4885         }
4886
4887         children = gtk_container_get_children (GTK_CONTAINER (view));
4888         for (l = children; l && l->data; l = g_list_next (l)) {
4889                 gint       child_x, child_y;
4890                 GtkWidget *child = (GtkWidget *)l->data;
4891
4892                 gtk_container_child_get (GTK_CONTAINER (view),
4893                                          child,
4894                                          "x", &child_x,
4895                                          "y", &child_y,
4896                                          NULL);
4897                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4898         }
4899         g_list_free (children);
4900
4901         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4902                 EvViewWindowChild *child;
4903
4904                 child = (EvViewWindowChild *)l->data;
4905
4906                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4907         }
4908
4909         if (view->pending_resize)
4910                 gtk_widget_queue_draw (GTK_WIDGET (view));
4911         else
4912                 gdk_window_scroll (view->layout.bin_window, dx, dy);
4913
4914         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4915         ev_view_handle_cursor_over_xy (view, x, y);
4916
4917         if (view->document)
4918                 view_update_range_and_current_page (view);
4919 }
4920
4921 GtkWidget*
4922 ev_view_new (void)
4923 {
4924         GtkWidget *view;
4925
4926         view = g_object_new (EV_TYPE_VIEW, NULL);
4927
4928         return view;
4929 }
4930
4931 static void
4932 setup_caches (EvView *view)
4933 {
4934         view->page_cache = ev_page_cache_get (view->document);
4935         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
4936         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
4937         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
4938         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4939         page_changed_cb (view->page_cache,
4940                          ev_page_cache_get_current_page (view->page_cache),
4941                          view);
4942 }
4943
4944 static void
4945 clear_caches (EvView *view)
4946 {
4947         if (view->pixbuf_cache) {
4948                 g_object_unref (view->pixbuf_cache);
4949                 view->pixbuf_cache = NULL;
4950         }
4951
4952         if (view->page_cache) {
4953                 view->page_cache = NULL;
4954         }
4955 }
4956
4957 void
4958 ev_view_set_loading (EvView       *view,
4959                      gboolean      loading)
4960 {
4961         view->loading = loading;
4962         gtk_widget_queue_draw (GTK_WIDGET (view));
4963 }
4964
4965 static gboolean
4966 ev_view_autoscroll_cb (EvView *view)
4967 {
4968         gdouble speed, value;
4969
4970         /* If the user stops autoscrolling, autoscrolling will be
4971          * set to false but the timeout will continue; stop the timeout: */
4972         if (!view->scroll_info.autoscrolling) {
4973                 view->scroll_info.timeout_id = 0;
4974                 return FALSE;
4975         }
4976
4977         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4978                 (view->scroll_info.last_y < view->scroll_info.start_y))
4979                 return TRUE;
4980
4981         /* Replace 100 with your speed of choice: The lower the faster.
4982          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4983          *      based on the distance of the starting point from the mouse
4984          * (All also effected by the timeout interval of this callback) */
4985
4986         if (view->scroll_info.start_y > view->scroll_info.last_y)
4987                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
4988         else
4989                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
4990
4991         value = gtk_adjustment_get_value (view->vadjustment);
4992         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
4993         gtk_adjustment_set_value (view->vadjustment, value);
4994
4995         return TRUE;
4996
4997 }
4998
4999 void
5000 ev_view_autoscroll_start (EvView *view)
5001 {
5002         gint x, y;
5003
5004         g_return_if_fail (EV_IS_VIEW (view));
5005
5006         if (view->scroll_info.autoscrolling)
5007                 return;
5008
5009         view->scroll_info.autoscrolling = TRUE;
5010         view->scroll_info.timeout_id =
5011                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5012                                view);
5013
5014         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5015         ev_view_handle_cursor_over_xy (view, x, y);
5016 }
5017
5018 void
5019 ev_view_autoscroll_stop (EvView *view)
5020 {
5021         gint x, y;
5022
5023         g_return_if_fail (EV_IS_VIEW (view));
5024
5025         if (!view->scroll_info.autoscrolling)
5026                 return;
5027
5028         view->scroll_info.autoscrolling = FALSE;
5029         if (view->scroll_info.timeout_id) {
5030                 g_source_remove (view->scroll_info.timeout_id);
5031                 view->scroll_info.timeout_id = 0;
5032         }
5033
5034         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5035         ev_view_handle_cursor_over_xy (view, x, y);
5036 }
5037
5038 void
5039 ev_view_set_document (EvView     *view,
5040                       EvDocument *document)
5041 {
5042         g_return_if_fail (EV_IS_VIEW (view));
5043
5044         view->loading = FALSE;
5045
5046         if (document != view->document) {
5047                 clear_caches (view);
5048
5049                 if (view->document) {
5050                         g_object_unref (view->document);
5051                         view->page_cache = NULL;
5052                 }
5053
5054                 view->document = document;
5055                 view->find_result = 0;
5056
5057                 if (view->document) {
5058                         g_object_ref (view->document);
5059                         setup_caches (view);
5060                 }
5061
5062                 view_update_range_and_current_page (view);
5063
5064                 gtk_widget_queue_resize (GTK_WIDGET (view));
5065         }
5066 }
5067
5068 static void
5069 ev_view_reload_page (EvView    *view,
5070                      gint       page,
5071                      GdkRegion *region)
5072 {
5073         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5074                                      region,
5075                                      page,
5076                                      view->rotation,
5077                                      view->scale);
5078 }
5079
5080 void
5081 ev_view_reload (EvView *view)
5082 {
5083         ev_pixbuf_cache_clear (view->pixbuf_cache);
5084         view_update_range_and_current_page (view);
5085 }
5086
5087 /*** Zoom and sizing mode ***/
5088
5089 #define EPSILON 0.0000001
5090 void
5091 ev_view_set_zoom (EvView   *view,
5092                   double    factor,
5093                   gboolean  relative)
5094 {
5095         double scale;
5096
5097         if (relative)
5098                 scale = view->scale * factor;
5099         else
5100                 scale = factor;
5101
5102         scale = CLAMP (scale,
5103                        view->sizing_mode == EV_SIZING_FREE ? view->min_scale : 0,
5104                        view->max_scale);
5105
5106         if (scale == view->scale)
5107                 return;
5108
5109         if (ABS (view->scale - scale) < EPSILON)
5110                 return;
5111
5112         if (view->loading_text) {
5113                 cairo_surface_destroy (view->loading_text);
5114                 view->loading_text = NULL;
5115         }
5116
5117         view->scale = scale;
5118         view->pending_resize = TRUE;
5119
5120         gtk_widget_queue_resize (GTK_WIDGET (view));
5121
5122         g_object_notify (G_OBJECT (view), "zoom");
5123 }
5124
5125 double
5126 ev_view_get_zoom (EvView *view)
5127 {
5128         return view->scale;
5129 }
5130
5131 void
5132 ev_view_set_screen_dpi (EvView  *view,
5133                         gdouble  dpi)
5134 {
5135         g_return_if_fail (EV_IS_VIEW (view));
5136         g_return_if_fail (dpi > 0);
5137
5138         view->dpi = dpi;
5139         view->min_scale = MIN_SCALE * dpi / 72.0;
5140         view->max_scale = MAX_SCALE * dpi / 72.0;
5141 }
5142
5143 gboolean
5144 ev_view_get_continuous (EvView *view)
5145 {
5146         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5147
5148         return view->continuous;
5149 }
5150
5151 void
5152 ev_view_set_continuous (EvView   *view,
5153                         gboolean  continuous)
5154 {
5155         g_return_if_fail (EV_IS_VIEW (view));
5156
5157         continuous = continuous != FALSE;
5158
5159         if (view->continuous != continuous) {
5160                 view->continuous = continuous;
5161                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5162                 gtk_widget_queue_resize (GTK_WIDGET (view));
5163         }
5164
5165         g_object_notify (G_OBJECT (view), "continuous");
5166 }
5167
5168 gboolean
5169 ev_view_get_dual_page (EvView *view)
5170 {
5171         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5172
5173         return view->dual_page;
5174 }
5175
5176 void
5177 ev_view_set_dual_page (EvView   *view,
5178                        gboolean  dual_page)
5179 {
5180         g_return_if_fail (EV_IS_VIEW (view));
5181
5182         dual_page = dual_page != FALSE;
5183
5184         if (view->dual_page == dual_page)
5185                 return;
5186
5187         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5188         view->dual_page = dual_page;
5189         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5190          * preload_cache_size to be 2 if dual_page is set.
5191          */
5192         gtk_widget_queue_resize (GTK_WIDGET (view));
5193
5194         g_object_notify (G_OBJECT (view), "dual-page");
5195 }
5196
5197 void
5198 ev_view_set_fullscreen (EvView   *view,
5199                          gboolean  fullscreen)
5200 {
5201         g_return_if_fail (EV_IS_VIEW (view));
5202
5203         fullscreen = fullscreen != FALSE;
5204
5205         if (view->fullscreen == fullscreen)
5206                 return;
5207
5208         view->fullscreen = fullscreen;
5209         gtk_widget_queue_resize (GTK_WIDGET (view));
5210
5211         g_object_notify (G_OBJECT (view), "fullscreen");
5212 }
5213
5214 gboolean
5215 ev_view_get_fullscreen (EvView *view)
5216 {
5217         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5218
5219         return view->fullscreen;
5220 }
5221
5222 void
5223 ev_view_set_presentation (EvView   *view,
5224                           gboolean  presentation)
5225 {
5226         g_return_if_fail (EV_IS_VIEW (view));
5227
5228         presentation = presentation != FALSE;
5229
5230         if (view->presentation == presentation)
5231                 return;
5232
5233         if (!presentation)
5234                 view->presentation_state = EV_PRESENTATION_NORMAL;
5235
5236         view->presentation = presentation;
5237         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5238
5239         if (presentation) {
5240                 view->sizing_mode_saved = view->sizing_mode;
5241                 view->scale_saved = view->scale;
5242                 ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
5243         } else {
5244                 ev_view_set_sizing_mode (view, view->sizing_mode_saved);
5245                 ev_view_set_zoom (view, view->scale_saved, FALSE);
5246         }
5247
5248         gtk_widget_queue_resize (GTK_WIDGET (view));
5249
5250         if (presentation)
5251                 ev_view_presentation_transition_start (view);
5252         else {
5253                 ev_view_presentation_transition_stop (view);
5254
5255                 if (view->animation) {
5256                         /* stop any running animation */
5257                         ev_view_transition_animation_cancel (view->animation, view);
5258                 }
5259         }
5260
5261         if (GTK_WIDGET_REALIZED (view)) {
5262                 if (view->presentation)
5263                         gdk_window_set_background (view->layout.bin_window,
5264                                                    &GTK_WIDGET (view)->style->black);
5265                 else
5266                         gdk_window_set_background (view->layout.bin_window,
5267                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
5268         }
5269
5270         g_object_notify (G_OBJECT (view), "presentation");
5271 }
5272
5273 gboolean
5274 ev_view_get_presentation (EvView *view)
5275 {
5276         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5277
5278         return view->presentation;
5279 }
5280
5281 static gboolean
5282 transition_next_page (EvView *view)
5283 {
5284         ev_view_next_page (view);
5285
5286         return FALSE;
5287 }
5288
5289 static void
5290 ev_view_presentation_transition_stop (EvView *view)
5291 {
5292         if (view->trans_timeout_id > 0)
5293                 g_source_remove (view->trans_timeout_id);
5294         view->trans_timeout_id = 0;
5295 }
5296
5297 static void
5298 ev_view_presentation_transition_start (EvView *view)
5299 {
5300         gdouble duration;
5301
5302         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
5303                 return;
5304
5305         ev_view_presentation_transition_stop (view);
5306
5307         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
5308                                                              view->current_page);
5309         if (duration > 0) {
5310                 view->trans_timeout_id =
5311                         g_timeout_add_seconds (duration,
5312                                                (GSourceFunc) transition_next_page,
5313                                                view);
5314         }
5315 }
5316
5317 void
5318 ev_view_set_sizing_mode (EvView       *view,
5319                          EvSizingMode  sizing_mode)
5320 {
5321         g_return_if_fail (EV_IS_VIEW (view));
5322
5323         if (view->sizing_mode == sizing_mode)
5324                 return;
5325
5326         view->sizing_mode = sizing_mode;
5327         gtk_widget_queue_resize (GTK_WIDGET (view));
5328
5329         g_object_notify (G_OBJECT (view), "sizing-mode");
5330 }
5331
5332 EvSizingMode
5333 ev_view_get_sizing_mode (EvView *view)
5334 {
5335         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
5336
5337         return view->sizing_mode;
5338 }
5339
5340 gboolean
5341 ev_view_can_zoom_in (EvView *view)
5342 {
5343         return view->scale * ZOOM_IN_FACTOR <= view->max_scale;
5344 }
5345
5346 gboolean
5347 ev_view_can_zoom_out (EvView *view)
5348 {
5349         return view->scale * ZOOM_OUT_FACTOR >= view->min_scale;
5350 }
5351
5352 void
5353 ev_view_zoom_in (EvView *view)
5354 {
5355         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5356
5357         if (view->presentation)
5358                 return;
5359
5360         view->pending_scroll = SCROLL_TO_CENTER;
5361         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
5362 }
5363
5364 void
5365 ev_view_zoom_out (EvView *view)
5366 {
5367         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5368
5369         if (view->presentation)
5370                 return;
5371
5372         view->pending_scroll = SCROLL_TO_CENTER;
5373         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
5374 }
5375
5376 void
5377 ev_view_rotate_right (EvView *view)
5378 {
5379         int rotation = view->rotation + 90;
5380
5381         if (rotation >= 360) {
5382                 rotation -= 360;
5383         }
5384
5385         ev_view_set_rotation (view, rotation);
5386 }
5387
5388 void
5389 ev_view_rotate_left (EvView *view)
5390 {
5391         int rotation = view->rotation - 90;
5392
5393         if (rotation < 0) {
5394                 rotation += 360;
5395         }
5396
5397         ev_view_set_rotation (view, rotation);
5398 }
5399
5400 void
5401 ev_view_set_rotation (EvView *view, int rotation)
5402 {
5403         view->rotation = rotation;
5404
5405         if (view->pixbuf_cache) {
5406                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5407                 gtk_widget_queue_resize (GTK_WIDGET (view));
5408         }
5409
5410         if (rotation != 0)
5411                 clear_selection (view);
5412
5413         g_object_notify (G_OBJECT (view), "rotation");
5414 }
5415
5416 int
5417 ev_view_get_rotation (EvView *view)
5418 {
5419         return view->rotation;
5420 }
5421
5422 static double
5423 zoom_for_size_fit_width (gdouble doc_width,
5424                          gdouble doc_height,
5425                          int     target_width,
5426                          int     target_height,
5427                          int     vsb_width)
5428 {
5429         double scale;
5430
5431         scale = (double)target_width / doc_width;
5432
5433         if (doc_height * scale > target_height)
5434                 scale = (double) (target_width - vsb_width) / doc_width;
5435
5436         return scale;
5437 }
5438
5439 static double
5440 zoom_for_size_fit_height (gdouble doc_width,
5441                           gdouble doc_height,
5442                           int     target_width,
5443                           int     target_height,
5444                           int     vsb_height)
5445 {
5446         double scale;
5447
5448         scale = (double)target_height / doc_height;
5449
5450         if (doc_width * scale > target_width)
5451                 scale = (double) (target_height - vsb_height) / doc_height;
5452
5453         return scale;
5454 }
5455
5456 static double
5457 zoom_for_size_best_fit (gdouble doc_width,
5458                         gdouble doc_height,
5459                         int     target_width,
5460                         int     target_height,
5461                         int     vsb_width,
5462                         int     hsb_width)
5463 {
5464         double w_scale;
5465         double h_scale;
5466
5467         w_scale = (double)target_width / doc_width;
5468         h_scale = (double)target_height / doc_height;
5469
5470         if (doc_height * w_scale > target_height)
5471                 w_scale = (double) (target_width - vsb_width) / doc_width;
5472         if (doc_width * h_scale > target_width)
5473                 h_scale = (double) (target_height - hsb_width) / doc_height;
5474
5475         return MIN (w_scale, h_scale);
5476 }
5477
5478
5479 static void
5480 ev_view_zoom_for_size_presentation (EvView *view,
5481                                     int     width,
5482                                     int     height)
5483 {
5484         gdouble doc_width, doc_height;
5485         gdouble scale;
5486
5487         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5488         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
5489         ev_view_set_zoom (view, scale, FALSE);
5490 }
5491
5492 static void
5493 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5494                            int     width,
5495                            int     height,
5496                            int     vsb_width,
5497                            int     hsb_height)
5498 {
5499         gdouble doc_width, doc_height;
5500         GtkBorder border;
5501         gdouble scale;
5502
5503         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5504         if (view->rotation == 90 || view->rotation == 270) {
5505                 gdouble tmp;
5506
5507                 tmp = doc_width;
5508                 doc_width = doc_height;
5509                 doc_height = tmp;
5510         }
5511
5512         compute_border (view, doc_width, doc_height, &border);
5513
5514         doc_width *= 2;
5515         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5516         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5517
5518         /* FIXME: We really need to calculate the overall height here, not the
5519          * page height.  We assume there's always a vertical scrollbar for
5520          * now.  We need to fix this. */
5521         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5522                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
5523         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5524                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
5525         else
5526                 g_assert_not_reached ();
5527
5528         ev_view_set_zoom (view, scale, FALSE);
5529 }
5530
5531 static void
5532 ev_view_zoom_for_size_continuous (EvView *view,
5533                                   int     width,
5534                                   int     height,
5535                                   int     vsb_width,
5536                                   int     hsb_height)
5537 {
5538         gdouble doc_width, doc_height;
5539         GtkBorder border;
5540         gdouble scale;
5541
5542         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5543         if (view->rotation == 90 || view->rotation == 270) {
5544                 gdouble tmp;
5545
5546                 tmp = doc_width;
5547                 doc_width = doc_height;
5548                 doc_height = tmp;
5549         }
5550
5551         compute_border (view, doc_width, doc_height, &border);
5552
5553         width -= (border.left + border.right + 2 * view->spacing);
5554         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5555
5556         /* FIXME: We really need to calculate the overall height here, not the
5557          * page height.  We assume there's always a vertical scrollbar for
5558          * now.  We need to fix this. */
5559         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5560                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
5561         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5562                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
5563         else
5564                 g_assert_not_reached ();
5565
5566         ev_view_set_zoom (view, scale, FALSE);
5567 }
5568
5569 static void
5570 ev_view_zoom_for_size_dual_page (EvView *view,
5571                                  int     width,
5572                                  int     height,
5573                                  int     vsb_width,
5574                                  int     hsb_height)
5575 {
5576         GtkBorder border;
5577         gdouble doc_width, doc_height;
5578         gdouble scale;
5579         gint other_page;
5580
5581         other_page = view->current_page ^ 1;
5582
5583         /* Find the largest of the two. */
5584         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5585         if (other_page < ev_document_get_n_pages (view->document)) {
5586                 gdouble width_2, height_2;
5587
5588                 get_doc_page_size (view, other_page, &width_2, &height_2);
5589                 if (width_2 > doc_width)
5590                         doc_width = width_2;
5591                 if (height_2 > doc_height)
5592                         doc_height = height_2;
5593         }
5594         compute_border (view, width, height, &border);
5595
5596         doc_width = doc_width * 2;
5597         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5598         height -= (border.top + border.bottom + 2 * view->spacing);
5599
5600         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5601                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
5602         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5603                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
5604         else
5605                 g_assert_not_reached ();
5606
5607         ev_view_set_zoom (view, scale, FALSE);
5608 }
5609
5610 static void
5611 ev_view_zoom_for_size_single_page (EvView *view,
5612                                    int     width,
5613                                    int     height,
5614                                    int     vsb_width,
5615                                    int     hsb_height)
5616 {
5617         gdouble doc_width, doc_height;
5618         GtkBorder border;
5619         gdouble scale;
5620
5621         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5622
5623         /* Get an approximate border */
5624         compute_border (view, width, height, &border);
5625
5626         width -= (border.left + border.right + 2 * view->spacing);
5627         height -= (border.top + border.bottom + 2 * view->spacing);
5628
5629         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5630                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
5631         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5632                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
5633         else
5634                 g_assert_not_reached ();
5635
5636         ev_view_set_zoom (view, scale, FALSE);
5637 }
5638
5639 void
5640 ev_view_set_zoom_for_size (EvView *view,
5641                            int     width,
5642                            int     height,
5643                            int     vsb_width,
5644                            int     hsb_height)
5645 {
5646         g_return_if_fail (EV_IS_VIEW (view));
5647         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5648                           view->sizing_mode == EV_SIZING_BEST_FIT);
5649         g_return_if_fail (width >= 0);
5650         g_return_if_fail (height >= 0);
5651
5652         if (view->document == NULL)
5653                 return;
5654
5655         if (view->presentation)
5656                 ev_view_zoom_for_size_presentation (view, width, height);
5657         else if (view->continuous && view->dual_page)
5658                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
5659         else if (view->continuous)
5660                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
5661         else if (view->dual_page)
5662                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
5663         else
5664                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
5665 }
5666
5667 /*** Find ***/
5668 static gint
5669 ev_view_find_get_n_results (EvView *view, gint page)
5670 {
5671         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5672 }
5673
5674 static EvRectangle *
5675 ev_view_find_get_result (EvView *view, gint page, gint result)
5676 {
5677         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5678 }
5679
5680 static void
5681 jump_to_find_result (EvView *view)
5682 {
5683         gint n_results;
5684         gint page = view->current_page;
5685
5686         n_results = ev_view_find_get_n_results (view, page);
5687
5688         if (n_results > 0 && view->find_result < n_results) {
5689                 EvRectangle *rect;
5690                 GdkRectangle view_rect;
5691
5692                 rect = ev_view_find_get_result (view, page, view->find_result);
5693                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5694                 ensure_rectangle_is_visible (view, &view_rect);
5695                 view->jump_to_find_result = FALSE;
5696         }
5697 }
5698
5699 /**
5700  * jump_to_find_page
5701  * @view: #EvView instance
5702  * @direction: Direction to look
5703  * @shift: Shift from current page
5704  *
5705  * Jumps to the first page that has occurences of searched word.
5706  * Uses a direction where to look and a shift from current page.
5707  *
5708  */
5709 static void
5710 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5711 {
5712         int n_pages, i;
5713
5714         n_pages = ev_document_get_n_pages (view->document);
5715
5716         for (i = 0; i < n_pages; i++) {
5717                 int page;
5718
5719                 if (direction == EV_VIEW_FIND_NEXT)
5720                         page = view->current_page + i;
5721                 else
5722                         page = view->current_page - i;
5723                 page += shift;
5724
5725                 if (page >= n_pages) {
5726                         page = page - n_pages;
5727                 } else if (page < 0)
5728                         page = page + n_pages;
5729
5730                 if (ev_view_find_get_n_results (view, page) > 0) {
5731                         ev_page_cache_set_current_page (view->page_cache, page);
5732                         break;
5733                 }
5734         }
5735 }
5736
5737 void
5738 ev_view_find_changed (EvView *view, GList **results, gint page)
5739 {
5740         view->find_pages = results;
5741
5742         if (view->jump_to_find_result == TRUE) {
5743                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5744                 jump_to_find_result (view);
5745         }
5746
5747         if (view->current_page == page)
5748                 gtk_widget_queue_draw (GTK_WIDGET (view));
5749 }
5750
5751 void
5752 ev_view_find_next (EvView *view)
5753 {
5754         gint n_results;
5755
5756         n_results = ev_view_find_get_n_results (view, view->current_page);
5757         view->find_result++;
5758
5759         if (view->find_result >= n_results) {
5760                 view->find_result = 0;
5761                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5762                 jump_to_find_result (view);
5763         } else {
5764                 jump_to_find_result (view);
5765                 gtk_widget_queue_draw (GTK_WIDGET (view));
5766         }
5767 }
5768
5769 void
5770 ev_view_find_previous (EvView *view)
5771 {
5772         view->find_result--;
5773
5774         if (view->find_result < 0) {
5775                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5776                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5777                 jump_to_find_result (view);
5778         } else {
5779                 jump_to_find_result (view);
5780                 gtk_widget_queue_draw (GTK_WIDGET (view));
5781         }
5782 }
5783
5784 void
5785 ev_view_find_search_changed (EvView *view)
5786 {
5787         /* search string has changed, focus on new search result */
5788         view->jump_to_find_result = TRUE;
5789         view->find_pages = NULL;
5790 }
5791
5792 void
5793 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5794 {
5795         view->highlight_find_results = value;
5796         gtk_widget_queue_draw (GTK_WIDGET (view));
5797 }
5798
5799 void
5800 ev_view_find_cancel (EvView *view)
5801 {
5802         view->find_pages = NULL;
5803 }
5804
5805 /*** Selections ***/
5806
5807 /* compute_new_selection_rect/text calculates the area currently selected by
5808  * view_rect.  each handles a different mode;
5809  */
5810 static GList *
5811 compute_new_selection_rect (EvView       *view,
5812                             GdkPoint     *start,
5813                             GdkPoint     *stop)
5814 {
5815         GdkRectangle view_rect;
5816         int n_pages, i;
5817         GList *list = NULL;
5818
5819         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5820
5821         view_rect.x = MIN (start->x, stop->x);
5822         view_rect.y = MIN (start->y, stop->y);
5823         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5824         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5825
5826         n_pages = ev_document_get_n_pages (view->document);
5827
5828         for (i = 0; i < n_pages; i++) {
5829                 GdkRectangle page_area;
5830                 GtkBorder border;
5831
5832                 if (get_page_extents (view, i, &page_area, &border)) {
5833                         GdkRectangle overlap;
5834
5835                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5836                                 EvViewSelection *selection;
5837
5838                                 selection = g_new0 (EvViewSelection, 1);
5839                                 selection->page = i;
5840                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5841                                                        &(selection->rect));
5842
5843                                 list = g_list_append (list, selection);
5844                         }
5845                 }
5846         }
5847
5848         return list;
5849 }
5850
5851 static gboolean
5852 gdk_rectangle_point_in (GdkRectangle *rectangle,
5853                         GdkPoint     *point)
5854 {
5855         return rectangle->x <= point->x &&
5856                 rectangle->y <= point->y &&
5857                 point->x < rectangle->x + rectangle->width &&
5858                 point->y < rectangle->y + rectangle->height;
5859 }
5860
5861 static GList *
5862 compute_new_selection_text (EvView          *view,
5863                             EvSelectionStyle style,
5864                             GdkPoint        *start,
5865                             GdkPoint        *stop)
5866 {
5867         int n_pages, i, first, last;
5868         GList *list = NULL;
5869         EvViewSelection *selection;
5870         gdouble width, height;
5871         int start_page, end_page;
5872
5873         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5874
5875         n_pages = ev_document_get_n_pages (view->document);
5876
5877         /* First figure out the range of pages the selection
5878          * affects. */
5879         first = n_pages;
5880         last = 0;
5881         if (view->continuous) {
5882                 start_page = 0;
5883                 end_page = n_pages;
5884         } else if (view->dual_page) {
5885                 start_page = view->start_page;
5886                 end_page = view->end_page + 1;
5887         } else {
5888                 start_page = view->current_page;
5889                 end_page = view->current_page + 1;
5890         }
5891
5892         for (i = start_page; i < end_page; i++) {
5893                 GdkRectangle page_area;
5894                 GtkBorder border;
5895
5896                 get_page_extents (view, i, &page_area, &border);
5897                 if (gdk_rectangle_point_in (&page_area, start) ||
5898                     gdk_rectangle_point_in (&page_area, stop)) {
5899                         if (first == n_pages)
5900                                 first = i;
5901                         last = i;
5902                 }
5903
5904         }
5905
5906         /* Now create a list of EvViewSelection's for the affected
5907          * pages.  This could be an empty list, a list of just one
5908          * page or a number of pages.*/
5909         for (i = first; i < last + 1; i++) {
5910                 GdkRectangle page_area;
5911                 GtkBorder border;
5912                 GdkPoint *point;
5913
5914                 get_doc_page_size (view, i, &width, &height);
5915
5916                 selection = g_new0 (EvViewSelection, 1);
5917                 selection->page = i;
5918                 selection->style = style;
5919                 selection->rect.x1 = selection->rect.y1 = 0;
5920                 selection->rect.x2 = width;
5921                 selection->rect.y2 = height;
5922
5923                 get_page_extents (view, i, &page_area, &border);
5924
5925                 if (gdk_rectangle_point_in (&page_area, start))
5926                         point = start;
5927                 else
5928                         point = stop;
5929
5930                 if (i == first)
5931                         view_point_to_doc_point (view, point, &page_area,
5932                                                  &selection->rect.x1,
5933                                                  &selection->rect.y1);
5934
5935                 /* If the selection is contained within just one page,
5936                  * make sure we don't write 'start' into both points
5937                  * in selection->rect. */
5938                 if (first == last)
5939                         point = stop;
5940
5941                 if (i == last)
5942                         view_point_to_doc_point (view, point, &page_area,
5943                                                  &selection->rect.x2,
5944                                                  &selection->rect.y2);
5945
5946                 list = g_list_append (list, selection);
5947         }
5948
5949         return list;
5950 }
5951
5952 /* This function takes the newly calculated list, and figures out which regions
5953  * have changed.  It then queues a redraw approporiately.
5954  */
5955 static void
5956 merge_selection_region (EvView *view,
5957                         GList  *new_list)
5958 {
5959         GList *old_list;
5960         GList *new_list_ptr, *old_list_ptr;
5961
5962         /* Update the selection */
5963         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5964         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5965         g_list_free (view->selection_info.selections);
5966         view->selection_info.selections = new_list;
5967         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5968         g_object_notify (G_OBJECT (view), "has-selection");
5969
5970         new_list_ptr = new_list;
5971         old_list_ptr = old_list;
5972
5973         while (new_list_ptr || old_list_ptr) {
5974                 EvViewSelection *old_sel, *new_sel;
5975                 int cur_page;
5976                 GdkRegion *region = NULL;
5977
5978                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5979                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5980
5981                 /* Assume that the lists are in order, and we run through them
5982                  * comparing them, one page at a time.  We come out with the
5983                  * first page we see. */
5984                 if (new_sel && old_sel) {
5985                         if (new_sel->page < old_sel->page) {
5986                                 new_list_ptr = new_list_ptr->next;
5987                                 old_sel = NULL;
5988                         } else if (new_sel->page > old_sel->page) {
5989                                 old_list_ptr = old_list_ptr->next;
5990                                 new_sel = NULL;
5991                         } else {
5992                                 new_list_ptr = new_list_ptr->next;
5993                                 old_list_ptr = old_list_ptr->next;
5994                         }
5995                 } else if (new_sel) {
5996                         new_list_ptr = new_list_ptr->next;
5997                 } else if (old_sel) {
5998                         old_list_ptr = old_list_ptr->next;
5999                 }
6000
6001                 g_assert (new_sel || old_sel);
6002
6003                 /* is the page we're looking at on the screen?*/
6004                 cur_page = new_sel ? new_sel->page : old_sel->page;
6005                 if (cur_page < view->start_page || cur_page > view->end_page)
6006                         continue;
6007
6008                 /* seed the cache with a new page.  We are going to need the new
6009                  * region too. */
6010                 if (new_sel) {
6011                         GdkRegion *tmp_region = NULL;
6012
6013                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
6014                                                                cur_page,
6015                                                                view->scale,
6016                                                                &tmp_region);
6017
6018                         if (tmp_region) {
6019                                 new_sel->covered_region = gdk_region_copy (tmp_region);
6020                         }
6021                 }
6022
6023                 /* Now we figure out what needs redrawing */
6024                 if (old_sel && new_sel) {
6025                         if (old_sel->covered_region && new_sel->covered_region) {
6026                                 /* We only want to redraw the areas that have
6027                                  * changed, so we xor the old and new regions
6028                                  * and redraw if it's different */
6029                                 region = gdk_region_copy (old_sel->covered_region);
6030                                 gdk_region_xor (region, new_sel->covered_region);
6031                                 if (gdk_region_empty (region)) {
6032                                         gdk_region_destroy (region);
6033                                         region = NULL;
6034                                 }
6035                         } else if (old_sel->covered_region) {
6036                                 region = gdk_region_copy (old_sel->covered_region);
6037                         } else if (new_sel->covered_region) {
6038                                 region = gdk_region_copy (new_sel->covered_region);
6039                         }
6040                 } else if (old_sel && !new_sel) {
6041                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
6042                                 region = gdk_region_copy (old_sel->covered_region);
6043                         }
6044                 } else if (!old_sel && new_sel) {
6045                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
6046                                 region = gdk_region_copy (new_sel->covered_region);
6047                         }
6048                 } else {
6049                         g_assert_not_reached ();
6050                 }
6051
6052                 /* Redraw the damaged region! */
6053                 if (region) {
6054                         GdkRectangle page_area;
6055                         GtkBorder border;
6056
6057                         /* I don't know why but the region is smaller
6058                          * than expected. This hack fixes it, I guess
6059                          * 10 pixels more won't hurt
6060                          */
6061                         gdk_region_shrink (region, -5, -5);
6062
6063                         get_page_extents (view, cur_page, &page_area, &border);
6064                         gdk_region_offset (region,
6065                                            page_area.x + border.left - view->scroll_x,
6066                                            page_area.y + border.top - view->scroll_y);
6067                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
6068                         gdk_region_destroy (region);
6069                 }
6070         }
6071
6072         /* Free the old list, now that we're done with it. */
6073         g_list_foreach (old_list, (GFunc) selection_free, NULL);
6074         g_list_free (old_list);
6075 }
6076
6077 static void
6078 compute_selections (EvView          *view,
6079                     EvSelectionStyle style,
6080                     GdkPoint        *start,
6081                     GdkPoint        *stop)
6082 {
6083         GList *list;
6084
6085         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
6086                 list = compute_new_selection_rect (view, start, stop);
6087         else
6088                 list = compute_new_selection_text (view, style, start, stop);
6089         merge_selection_region (view, list);
6090 }
6091
6092 /* Free's the selection.  It's up to the caller to queue redraws if needed.
6093  */
6094 static void
6095 selection_free (EvViewSelection *selection)
6096 {
6097         if (selection->covered_region)
6098                 gdk_region_destroy (selection->covered_region);
6099         g_free (selection);
6100 }
6101
6102 static void
6103 clear_selection (EvView *view)
6104 {
6105         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6106         g_list_free (view->selection_info.selections);
6107         view->selection_info.selections = NULL;
6108         view->selection_info.in_selection = FALSE;
6109         if (view->pixbuf_cache)
6110                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6111         g_object_notify (G_OBJECT (view), "has-selection");
6112 }
6113
6114 void
6115 ev_view_select_all (EvView *view)
6116 {
6117         GList *selections = NULL;
6118         int n_pages, i;
6119
6120         /* Disable selection on rotated pages for the 0.4.0 series */
6121         if (view->rotation != 0)
6122                 return;
6123
6124         clear_selection (view);
6125
6126         n_pages = ev_document_get_n_pages (view->document);
6127         for (i = 0; i < n_pages; i++) {
6128                 gdouble width, height;
6129                 EvViewSelection *selection;
6130
6131                 get_doc_page_size (view, i, &width, &height);
6132
6133                 selection = g_new0 (EvViewSelection, 1);
6134                 selection->page = i;
6135                 selection->style = EV_SELECTION_STYLE_GLYPH;
6136                 selection->rect.x1 = selection->rect.y1 = 0;
6137                 selection->rect.x2 = width;
6138                 selection->rect.y2 = height;
6139
6140                 selections = g_list_append (selections, selection);
6141         }
6142
6143         merge_selection_region (view, selections);
6144         gtk_widget_queue_draw (GTK_WIDGET (view));
6145 }
6146
6147 gboolean
6148 ev_view_get_has_selection (EvView *view)
6149 {
6150         return view->selection_info.selections != NULL;
6151 }
6152
6153 static char *
6154 get_selected_text (EvView *view)
6155 {
6156         GString *text;
6157         GList *l;
6158         gchar *normalized_text;
6159         EvRenderContext *rc;
6160
6161         text = g_string_new (NULL);
6162         rc = ev_render_context_new (NULL, view->rotation, view->scale);
6163
6164         ev_document_doc_mutex_lock ();
6165
6166         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6167                 EvViewSelection *selection = (EvViewSelection *)l->data;
6168                 EvPage *page;
6169                 gchar *tmp;
6170
6171                 page = ev_document_get_page (view->document, selection->page);
6172                 ev_render_context_set_page (rc, page);
6173                 g_object_unref (page);
6174
6175                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6176                                                       rc, selection->style,
6177                                                       &(selection->rect));
6178
6179                 g_string_append (text, tmp);
6180                 g_free (tmp);
6181         }
6182
6183         g_object_unref (rc);
6184
6185         ev_document_doc_mutex_unlock ();
6186
6187         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6188         g_string_free (text, TRUE);
6189         return normalized_text;
6190 }
6191
6192 static void
6193 ev_view_clipboard_copy (EvView      *view,
6194                         const gchar *text)
6195 {
6196         GtkClipboard *clipboard;
6197
6198         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6199                                               GDK_SELECTION_CLIPBOARD);
6200         gtk_clipboard_set_text (clipboard, text, -1);
6201 }
6202
6203 void
6204 ev_view_copy (EvView *ev_view)
6205 {
6206         char *text;
6207
6208         if (!EV_IS_SELECTION (ev_view->document))
6209                 return;
6210
6211         text = get_selected_text (ev_view);
6212         ev_view_clipboard_copy (ev_view, text);
6213         g_free (text);
6214 }
6215
6216 static void
6217 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6218                         GtkSelectionData *selection_data,
6219                         guint             info,
6220                         gpointer          data)
6221 {
6222         EvView *ev_view = EV_VIEW (data);
6223
6224         if (ev_view->link_selected) {
6225                 gtk_selection_data_set_text (selection_data,
6226                                              ev_link_action_get_uri (ev_view->link_selected),
6227                                              -1);
6228         } else if (EV_IS_SELECTION (ev_view->document) &&
6229                    ev_view->selection_info.selections) {
6230                 gchar *text;
6231
6232                 text = get_selected_text (ev_view);
6233                 if (text) {
6234                         gtk_selection_data_set_text (selection_data, text, -1);
6235                         g_free (text);
6236                 }
6237         }
6238 }
6239
6240 static void
6241 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6242                           gpointer      data)
6243 {
6244         EvView *view = EV_VIEW (data);
6245
6246         clear_selection (view);
6247         clear_link_selected (view);
6248 }
6249
6250 static void
6251 ev_view_update_primary_selection (EvView *ev_view)
6252 {
6253         GtkClipboard *clipboard;
6254
6255         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6256                                               GDK_SELECTION_PRIMARY);
6257
6258         if (ev_view->selection_info.selections || ev_view->link_selected) {
6259                 GtkTargetList *target_list;
6260                 GtkTargetEntry *targets;
6261                 int n_targets;
6262
6263                 target_list = gtk_target_list_new (NULL, 0);
6264                 gtk_target_list_add_text_targets (target_list, 0);
6265                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6266                 gtk_target_list_unref (target_list);
6267
6268                 if (!gtk_clipboard_set_with_owner (clipboard,
6269                                                    targets, n_targets,
6270                                                    ev_view_primary_get_cb,
6271                                                    ev_view_primary_clear_cb,
6272                                                    G_OBJECT (ev_view)))
6273                         ev_view_primary_clear_cb (clipboard, ev_view);
6274
6275                 gtk_target_table_free (targets, n_targets);
6276         } else {
6277                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6278                         gtk_clipboard_clear (clipboard);
6279         }
6280 }
6281
6282 static void
6283 clear_link_selected (EvView *view)
6284 {
6285         if (view->link_selected) {
6286                 g_object_unref (view->link_selected);
6287                 view->link_selected = NULL;
6288         }
6289 }
6290
6291 void
6292 ev_view_copy_link_address (EvView       *view,
6293                            EvLinkAction *action)
6294 {
6295         clear_link_selected (view);
6296
6297         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6298
6299         view->link_selected = g_object_ref (action);
6300         ev_view_update_primary_selection (view);
6301 }
6302
6303 /*** Cursor operations ***/
6304
6305 static GdkCursor *
6306 ev_view_create_invisible_cursor(void)
6307 {
6308        GdkBitmap *empty;
6309        GdkColor black = { 0, 0, 0, 0 };
6310        static char bits[] = { 0x00 };
6311
6312        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
6313
6314        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
6315 }
6316
6317 static void
6318 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6319 {
6320         GdkCursor *cursor = NULL;
6321         GdkDisplay *display;
6322         GtkWidget *widget;
6323
6324         if (view->cursor == new_cursor) {
6325                 return;
6326         }
6327
6328         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6329         display = gtk_widget_get_display (widget);
6330         view->cursor = new_cursor;
6331
6332         switch (new_cursor) {
6333                 case EV_VIEW_CURSOR_NORMAL:
6334                         gdk_window_set_cursor (view->layout.bin_window, NULL);
6335                         break;
6336                 case EV_VIEW_CURSOR_IBEAM:
6337                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
6338                         break;
6339                 case EV_VIEW_CURSOR_LINK:
6340                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
6341                         break;
6342                 case EV_VIEW_CURSOR_WAIT:
6343                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
6344                         break;
6345                 case EV_VIEW_CURSOR_HIDDEN:
6346                         cursor = ev_view_create_invisible_cursor ();
6347                         break;
6348                 case EV_VIEW_CURSOR_DRAG:
6349                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
6350                         break;
6351                 case EV_VIEW_CURSOR_AUTOSCROLL:
6352                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
6353                         break;
6354         }
6355
6356         if (cursor) {
6357                 gdk_window_set_cursor (view->layout.bin_window, cursor);
6358                 gdk_cursor_unref (cursor);
6359                 gdk_flush();
6360         }
6361 }
6362
6363 void
6364 ev_view_hide_cursor (EvView *view)
6365 {
6366        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6367 }
6368
6369 void
6370 ev_view_show_cursor (EvView *view)
6371 {
6372        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6373 }
6374
6375 static void
6376 ev_view_reset_presentation_state (EvView *view)
6377 {
6378         if (!view->presentation ||
6379             view->presentation_state == EV_PRESENTATION_NORMAL)
6380                 return;
6381
6382         view->presentation_state = EV_PRESENTATION_NORMAL;
6383         gdk_window_set_background (view->layout.bin_window,
6384                                    &GTK_WIDGET (view)->style->black);
6385         gtk_widget_queue_draw (GTK_WIDGET (view));
6386 }
6387
6388 gboolean
6389 ev_view_next_page (EvView *view)
6390 {
6391         int page, n_pages;
6392
6393         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6394
6395         if (!view->page_cache)
6396                 return FALSE;
6397
6398         if (view->presentation &&
6399             (view->presentation_state == EV_PRESENTATION_BLACK ||
6400              view->presentation_state == EV_PRESENTATION_WHITE)) {
6401                 ev_view_reset_presentation_state (view);
6402                 return FALSE;
6403         }
6404
6405         if (view->animation) {
6406                 ev_view_transition_animation_cancel (view->animation, view);
6407         }
6408
6409         ev_view_presentation_transition_stop (view);
6410         ev_view_reset_presentation_state (view);
6411
6412         page = ev_page_cache_get_current_page (view->page_cache);
6413         n_pages = ev_document_get_n_pages (view->document);
6414
6415         if (view->dual_page && !view->presentation)
6416                 page = page + 2;
6417         else
6418                 page = page + 1;
6419
6420         if (page < n_pages) {
6421                 ev_page_cache_set_current_page (view->page_cache, page);
6422                 return TRUE;
6423         } else if (view->presentation && page == n_pages) {
6424                 view->presentation_state = EV_PRESENTATION_END;
6425                 gtk_widget_queue_draw (GTK_WIDGET (view));
6426                 return TRUE;
6427         } else if (view->dual_page && page == n_pages) {
6428                 ev_page_cache_set_current_page (view->page_cache, page - 1);
6429                 return TRUE;
6430         } else {
6431                 return FALSE;
6432         }
6433 }
6434
6435 gboolean
6436 ev_view_previous_page (EvView *view)
6437 {
6438         int page;
6439
6440         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6441
6442         if (!view->page_cache)
6443                 return FALSE;
6444
6445         if (view->presentation &&
6446             view->presentation_state == EV_PRESENTATION_END) {
6447                 ev_view_reset_presentation_state (view);
6448                 return TRUE;
6449         }
6450
6451         if (view->presentation &&
6452             (view->presentation_state == EV_PRESENTATION_BLACK ||
6453              view->presentation_state == EV_PRESENTATION_WHITE)) {
6454                 ev_view_reset_presentation_state (view);
6455                 return FALSE;
6456         }
6457
6458         if (view->animation) {
6459                 ev_view_transition_animation_cancel (view->animation, view);
6460         }
6461
6462         ev_view_reset_presentation_state (view);
6463
6464         page = ev_page_cache_get_current_page (view->page_cache);
6465
6466         if (view->dual_page && !view->presentation)
6467                 page = page - 2;
6468         else
6469                 page = page - 1;
6470
6471         if (page >= 0) {
6472                 ev_page_cache_set_current_page (view->page_cache, page);
6473                 return TRUE;
6474         } else if (ev_view_get_dual_page (view) && page == -1) {
6475                 ev_page_cache_set_current_page (view->page_cache, 0);
6476                 return TRUE;
6477         } else {
6478                 return FALSE;
6479         }
6480 }
6481