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-pixbuf-cache.h"
  38 #include "ev-page-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_PRESENTATION,
  55         PROP_HAS_SELECTION
  56 };
  57
  58 enum {
  59         SIGNAL_BINDING_ACTIVATED,
  60         SIGNAL_HANDLE_LINK,
  61         SIGNAL_EXTERNAL_LINK,
  62         SIGNAL_POPUP_MENU,
  63         N_SIGNALS,
  64 };
  65
  66 enum {
  67         TARGET_DND_URI,
  68         TARGET_DND_TEXT,
  69         TARGET_DND_IMAGE
  70 };
  71
  72 static guint signals[N_SIGNALS];
  73
  74 typedef enum {
  75         EV_VIEW_FIND_NEXT,
  76         EV_VIEW_FIND_PREV
  77 } EvViewFindDirection;
  78
  79 #define ZOOM_IN_FACTOR  1.2
  80 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  81
  82 #define SCROLL_TIME 150
  83
  84 /*** Scrolling ***/
  85 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  86                                                               GtkAdjustment      *hadjustment,
  87                                                               GtkAdjustment      *vadjustment);
  88 static void       view_update_range_and_current_page         (EvView             *view);
  89 static void       set_scroll_adjustment                      (EvView             *view,
  90                                                               GtkOrientation      orientation,
  91                                                               GtkAdjustment      *adjustment);
  92 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
  93                                                               guint               keyval,
  94                                                               GdkModifierType modifiers,
  95                                                               GtkScrollType       scroll,
  96                                                               gboolean            horizontal);
  97 static void       ensure_rectangle_is_visible                (EvView             *view,
  98                                                               GdkRectangle       *rect);
  99
 100 /*** Geometry computations ***/
 101 static void       compute_border                             (EvView             *view,
 102                                                               int                 width,
 103                                                               int                 height,
 104                                                               GtkBorder          *border);
 105 static void       get_page_y_offset                          (EvView             *view,
 106                                                               int                 page,
 107                                                               int                *y_offset);
 108 static gboolean   get_page_extents                           (EvView             *view,
 109                                                               gint                page,
 110                                                               GdkRectangle       *page_area,
 111                                                               GtkBorder          *border);
 112 static void       view_rect_to_doc_rect                      (EvView             *view,
 113                                                               GdkRectangle       *view_rect,
 114                                                               GdkRectangle       *page_area,
 115                                                               EvRectangle        *doc_rect);
 116 static void       doc_rect_to_view_rect                      (EvView             *view,
 117                                                               int                 page,
 118                                                               EvRectangle        *doc_rect,
 119                                                               GdkRectangle       *view_rect);
 120 static gboolean   get_dual_even_left                         (EvView             *view);
 121 static void       find_page_at_location                      (EvView             *view,
 122                                                               gdouble             x,
 123                                                               gdouble             y,
 124                                                               gint               *page,
 125                                                               gint               *x_offset,
 126                                                               gint               *y_offset);
 127 static void       doc_point_to_view_point                    (EvView             *view,
 128                                                               int                 page,
 129                                                               EvPoint            *doc_point,
 130                                                               GdkPoint           *view_point);
 131 /*** Hyperrefs ***/
 132 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 133                                                               gdouble             x,
 134                                                               gdouble             y);
 135 static char*      tip_from_link                              (EvView             *view,
 136                                                               EvLink             *link);
 137 /*** Forms ***/
 138 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 139                                                                gdouble            x,
 140                                                                gdouble            y);
 141
 142 /*** Annotations ***/
 143 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 144                                                               gdouble             x,
 145                                                               gdouble             y);
 146 static void          show_annotation_windows                 (EvView             *view,
 147                                                               gint                page);
 148 static void          hide_annotation_windows                 (EvView             *view,
 149                                                               gint                page);
 150 /*** GtkWidget implementation ***/
 151 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 152                                                               GtkRequisition     *requisition);
 153 static void       ev_view_size_request_continuous            (EvView             *view,
 154                                                               GtkRequisition     *requisition);
 155 static void       ev_view_size_request_dual_page             (EvView             *view,
 156                                                               GtkRequisition     *requisition);
 157 static void       ev_view_size_request_single_page           (EvView             *view,
 158                                                               GtkRequisition     *requisition);
 159 static void       ev_view_size_request                       (GtkWidget          *widget,
 160                                                               GtkRequisition     *requisition);
 161 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 162                                                               GtkAllocation      *allocation);
 163 static void       ev_view_realize                            (GtkWidget          *widget);
 164 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 165                                                               GdkEventScroll     *event);
 166 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 167                                                               GdkEventExpose     *event);
 168 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 169 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 170                                                               GdkEventButton     *event);
 171 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 172                                                               GdkEventMotion     *event);
 173 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 174                                                               GdkEventButton     *event);
 175 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 176                                                               GdkEventCrossing   *event);
 177 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 178                                                               GdkEventCrossing   *event);
 179 static void       ev_view_style_set                          (GtkWidget          *widget,
 180                                                               GtkStyle           *old_style);
 181 static void       ev_view_remove_all                         (EvView             *view);
 182
 183 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 184
 185 /*** Drawing ***/
 186 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 187 static void       draw_rubberband                            (GtkWidget          *widget,
 188                                                               GdkWindow          *window,
 189                                                               const GdkRectangle *rect,
 190                                                               guchar              alpha);
 191 static void       highlight_find_results                     (EvView             *view,
 192                                                               int                 page);
 193 static void       draw_one_page                              (EvView             *view,
 194                                                               gint                page,
 195                                                               cairo_t            *cr,
 196                                                               GdkRectangle       *page_area,
 197                                                               GtkBorder          *border,
 198                                                               GdkRectangle       *expose_area,
 199                                                               gboolean           *page_ready);
 200 static void       draw_loading_text                          (EvView             *view,
 201                                                               GdkRectangle       *page_area,
 202                                                               GdkRectangle       *expose_area);
 203 static void       ev_view_reload_page                        (EvView             *view,
 204                                                               gint                page,
 205                                                               GdkRegion          *region);
 206
 207 /*** Callbacks ***/
 208 static void       ev_view_change_page                        (EvView             *view,
 209                                                               gint                new_page,
 210                                                               gboolean            start_transition);
 211 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 212                                                               GdkRegion          *region,
 213                                                               EvView             *view);
 214 static void       ev_view_page_changed_cb                    (EvDocumentModel    *model,
 215                                                               gint                old_page,
 216                                                               gint                new_page,
 217                                                               EvView             *view);
 218 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 219                                                               EvView             *view);
 220
 221 /*** GObject ***/
 222 static void       ev_view_finalize                           (GObject            *object);
 223 static void       ev_view_destroy                            (GtkObject          *object);
 224 static void       ev_view_set_property                       (GObject            *object,
 225                                                               guint               prop_id,
 226                                                               const GValue       *value,
 227                                                               GParamSpec         *pspec);
 228 static void       ev_view_get_property                       (GObject            *object,
 229                                                               guint               prop_id,
 230                                                               GValue             *value,
 231                                                               GParamSpec         *pspec);
 232 static void       ev_view_class_init                         (EvViewClass        *class);
 233 static void       ev_view_init                               (EvView             *view);
 234
 235 /*** Zoom and sizing ***/
 236 static double   zoom_for_size_fit_width                      (gdouble doc_width,
 237                                                               gdouble doc_height,
 238                                                               int     target_width,
 239                                                               int     target_height);
 240 static double   zoom_for_size_fit_height                     (gdouble doc_width,
 241                                                               gdouble doc_height,
 242                                                               int     target_width,
 243                                                               int     target_height);
 244 static double   zoom_for_size_best_fit                       (gdouble doc_width,
 245                                                               gdouble doc_height,
 246                                                               int     target_width,
 247                                                               int     target_height);
 248 static void     ev_view_zoom_for_size                        (EvView *view,
 249                                                               int     width,
 250                                                               int     height);
 251 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 252                                                               int     width,
 253                                                               int     height);
 254 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 255                                                                 int     width,
 256                                                                 int     height);
 257 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 258                                                                 int     width,
 259                                                                 int     height);
 260 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 261                                                                 int     width,
 262                                                                 int     height);
 263 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 264                                                                 int     width,
 265                                                                 int     height);
 266 /*** Cursors ***/
 267 static GdkCursor* ev_view_create_invisible_cursor            (void);
 268 static void       ev_view_set_cursor                         (EvView             *view,
 269                                                               EvViewCursor        new_cursor);
 270 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 271                                                               gint x,
 272                                                               gint y);
 273
 274 /*** Find ***/
 275 static gint         ev_view_find_get_n_results               (EvView             *view,
 276                                                               gint                page);
 277 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 278                                                               gint                page,
 279                                                               gint                result);
 280 static void       jump_to_find_result                        (EvView             *view);
 281 static void       jump_to_find_page                          (EvView             *view,
 282                                                               EvViewFindDirection direction,
 283                                                               gint                shift);
 284
 285 /*** Selection ***/
 286 static void       compute_selections                         (EvView             *view,
 287                                                               EvSelectionStyle    style,
 288                                                               GdkPoint           *start,
 289                                                               GdkPoint           *stop);
 290 static void       clear_selection                            (EvView             *view);
 291 static void       clear_link_selected                        (EvView             *view);
 292 static void       selection_free                             (EvViewSelection    *selection);
 293 static char*      get_selected_text                          (EvView             *ev_view);
 294 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 295                                                               GtkSelectionData   *selection_data,
 296                                                               guint               info,
 297                                                               gpointer            data);
 298 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 299                                                               gpointer            data);
 300 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 301
 302 /*** Presentation ***/
 303 static void       ev_view_presentation_transition_start      (EvView             *ev_view);
 304 static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
 305
 306
 307 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 308
 309 /* HeightToPage cache */
 310 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 311
 312 static void
 313 build_height_to_page (EvHeightToPageCache *cache,
 314                       EvDocument          *document,
 315                       gint                 rotation)
 316 {
 317         gboolean swap, uniform, dual_even_left;
 318         int i;
 319         double uniform_height, page_height, next_page_height;
 320         double saved_height;
 321         gdouble u_width, u_height;
 322         gint n_pages;
 323
 324         swap = (rotation == 90 || rotation == 270);
 325
 326         uniform = ev_document_is_page_size_uniform (document);
 327         n_pages = ev_document_get_n_pages (document);
 328         dual_even_left = (n_pages > 2);
 329
 330         g_free (cache->height_to_page);
 331         g_free (cache->dual_height_to_page);
 332
 333         cache->rotation = rotation;
 334         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 335         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 336
 337         if (uniform)
 338                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 339
 340         saved_height = 0;
 341         for (i = 0; i <= n_pages; i++) {
 342                 if (uniform) {
 343                         uniform_height = swap ? u_width : u_height;
 344                         cache->height_to_page[i] = i * uniform_height;
 345                 } else {
 346                         if (i < n_pages) {
 347                                 gdouble w, h;
 348
 349                                 ev_document_get_page_size (document, i, &w, &h);
 350                                 page_height = swap ? w : h;
 351                         } else {
 352                                 page_height = 0;
 353                         }
 354                         cache->height_to_page[i] = saved_height;
 355                         saved_height += page_height;
 356                 }
 357         }
 358
 359         if (dual_even_left && !uniform) {
 360                 gdouble w, h;
 361
 362                 ev_document_get_page_size (document, 0, &w, &h);
 363                 saved_height = swap ? w : h;
 364         } else {
 365                 saved_height = 0;
 366         }
 367
 368         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 369                 if (uniform) {
 370                         uniform_height = swap ? u_width : u_height;
 371                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 372                         if (i + 1 < n_pages + 2)
 373                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 374                 } else {
 375                         if (i + 1 < n_pages) {
 376                                 gdouble w, h;
 377
 378                                 ev_document_get_page_size (document, i + 1, &w, &h);
 379                                 next_page_height = swap ? w : h;
 380                         } else {
 381                                 next_page_height = 0;
 382                         }
 383
 384                         if (i < n_pages) {
 385                                 gdouble w, h;
 386
 387                                 ev_document_get_page_size (document, i, &w, &h);
 388                                 page_height = swap ? w : h;
 389                         } else {
 390                                 page_height = 0;
 391                         }
 392
 393                         if (i + 1 < n_pages + 2) {
 394                                 cache->dual_height_to_page[i] = saved_height;
 395                                 cache->dual_height_to_page[i + 1] = saved_height;
 396                                 saved_height += MAX(page_height, next_page_height);
 397                         } else {
 398                                 cache->dual_height_to_page[i] = saved_height;
 399                         }
 400                 }
 401         }
 402 }
 403
 404 static void
 405 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 406                                     EvDocument          *document,
 407                                     gint                 page,
 408                                     gint                 rotation,
 409                                     gdouble             *height,
 410                                     gdouble             *dual_height)
 411 {
 412         if (cache->rotation != rotation)
 413                 build_height_to_page (cache, document, rotation);
 414
 415         *height = cache->height_to_page[page];
 416         *dual_height = cache->dual_height_to_page[page];
 417 }
 418
 419 static void
 420 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 421 {
 422         if (cache->height_to_page) {
 423                 g_free (cache->height_to_page);
 424                 cache->height_to_page = NULL;
 425         }
 426
 427         if (cache->dual_height_to_page) {
 428                 g_free (cache->dual_height_to_page);
 429                 cache->dual_height_to_page = NULL;
 430         }
 431         g_free (cache);
 432 }
 433
 434 static EvHeightToPageCache *
 435 ev_view_get_height_to_page_cache (EvView *view)
 436 {
 437         EvHeightToPageCache *cache;
 438
 439         if (!view->document)
 440                 return NULL;
 441
 442         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 443         if (!cache) {
 444                 cache = g_new0 (EvHeightToPageCache, 1);
 445                 build_height_to_page (cache, view->document, view->rotation);
 446                 g_object_set_data_full (G_OBJECT (view->document),
 447                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 448                                         cache,
 449                                         (GDestroyNotify)ev_height_to_page_cache_free);
 450         }
 451
 452         return cache;
 453 }
 454
 455 static void
 456 ev_view_get_height_to_page (EvView *view,
 457                             gint    page,
 458                             gint   *height,
 459                             gint   *dual_height)
 460 {
 461         gdouble h, dh;
 462
 463         if (!view->height_to_page_cache)
 464                 return;
 465
 466         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 467                                             view->document,
 468                                             page,
 469                                             view->rotation,
 470                                             &h, &dh);
 471         if (height)
 472                 *height = (gint)(h * view->scale + 0.5);
 473
 474         if (dual_height)
 475                 *dual_height = (gint)(dh * view->scale + 0.5);
 476 }
 477
 478 static gint
 479 ev_view_get_scrollbar_size (EvView        *view,
 480                             GtkOrientation orientation)
 481 {
 482         GtkWidget *widget = GTK_WIDGET (view);
 483         GtkWidget *sb;
 484         GtkWidget *swindow = gtk_widget_get_parent (GTK_WIDGET (view));
 485         GtkRequisition req;
 486         gint spacing;
 487
 488         if (!GTK_IS_SCROLLED_WINDOW (swindow))
 489                 return 0;
 490
 491         if (orientation == GTK_ORIENTATION_VERTICAL) {
 492                 if (widget->allocation.height >= widget->requisition.height)
 493                         sb = gtk_scrolled_window_get_vscrollbar (GTK_SCROLLED_WINDOW (swindow));
 494                 else
 495                         return 0;
 496         } else {
 497                 if (widget->allocation.width >= widget->requisition.width)
 498                         sb = gtk_scrolled_window_get_hscrollbar (GTK_SCROLLED_WINDOW (swindow));
 499                 else
 500                         return 0;
 501         }
 502
 503         gtk_widget_style_get (swindow, "scrollbar_spacing", &spacing, NULL);
 504         gtk_widget_size_request (sb, &req);
 505
 506         return (orientation == GTK_ORIENTATION_VERTICAL ? req.width : req.height) + spacing;
 507 }
 508
 509 static void
 510 scroll_to_point (EvView        *view,
 511                  gdouble        x,
 512                  gdouble        y,
 513                  GtkOrientation orientation)
 514 {
 515         if (orientation == GTK_ORIENTATION_VERTICAL) {
 516                 if (view->continuous) {
 517                         gtk_adjustment_clamp_page (view->vadjustment,
 518                                                    y - view->spacing / 2,
 519                                                    y + view->vadjustment->page_size);
 520                 } else {
 521                         gtk_adjustment_set_value (view->vadjustment,
 522                                                   CLAMP (y,
 523                                                   view->vadjustment->lower,
 524                                                   view->vadjustment->upper -
 525                                                   view->vadjustment->page_size));
 526                 }
 527         } else {
 528                 if (view->dual_page) {
 529                         gtk_adjustment_clamp_page (view->hadjustment, x,
 530                                                    x + view->hadjustment->page_size);
 531                 } else {
 532                         gtk_adjustment_set_value (view->hadjustment,
 533                                                   CLAMP (x,
 534                                                   view->hadjustment->lower,
 535                                                   view->hadjustment->upper -
 536                                                   view->hadjustment->page_size));
 537                 }
 538         }
 539 }
 540
 541 static void
 542 ev_view_scroll_to_page_position (EvView *view, GtkOrientation orientation)
 543 {
 544         gdouble x, y;
 545
 546         if (!view->document)
 547                 return;
 548
 549         if ((orientation == GTK_ORIENTATION_VERTICAL && view->pending_point.y == 0) ||
 550             (orientation == GTK_ORIENTATION_HORIZONTAL && view->pending_point.x == 0)) {
 551                 GdkRectangle page_area;
 552                 GtkBorder    border;
 553
 554                 get_page_extents (view, view->current_page, &page_area, &border);
 555                 x = page_area.x;
 556                 y = page_area.y;
 557         } else {
 558                 GdkPoint view_point;
 559
 560                 doc_point_to_view_point (view, view->current_page,
 561                                          &view->pending_point, &view_point);
 562                 x = view_point.x;
 563                 y = view_point.y;
 564         }
 565
 566         scroll_to_point (view, x, y, orientation);
 567 }
 568
 569 static void
 570 view_set_adjustment_values (EvView         *view,
 571                             GtkOrientation  orientation)
 572 {
 573         GtkWidget *widget = GTK_WIDGET (view);
 574         GtkAdjustment *adjustment;
 575         int requisition;
 576         int allocation;
 577
 578         double factor;
 579         gint new_value;
 580
 581         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 582                 requisition = widget->requisition.width;
 583                 allocation = widget->allocation.width;
 584                 adjustment = view->hadjustment;
 585         } else {
 586                 requisition = widget->requisition.height;
 587                 allocation = widget->allocation.height;
 588                 adjustment = view->vadjustment;
 589         }
 590
 591         if (!adjustment)
 592                 return;
 593
 594         factor = 1.0;
 595         switch (view->pending_scroll) {
 596                 case SCROLL_TO_KEEP_POSITION:
 597                 case SCROLL_TO_FIND_LOCATION:
 598                         factor = (adjustment->value) / adjustment->upper;
 599                         break;
 600                 case SCROLL_TO_PAGE_POSITION:
 601                         break;
 602                 case SCROLL_TO_CENTER:
 603                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 604                         break;
 605         }
 606
 607         adjustment->page_size = allocation;
 608         adjustment->step_increment = allocation * 0.1;
 609         adjustment->page_increment = allocation * 0.9;
 610         adjustment->lower = 0;
 611         adjustment->upper = MAX (allocation, requisition);
 612
 613         /*
 614          * We add 0.5 to the values before to average out our rounding errors.
 615          */
 616         switch (view->pending_scroll) {
 617                 case SCROLL_TO_KEEP_POSITION:
 618                 case SCROLL_TO_FIND_LOCATION:
 619                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 620                         gtk_adjustment_set_value (adjustment, (int)new_value);
 621                         break;
 622                 case SCROLL_TO_PAGE_POSITION:
 623                         ev_view_scroll_to_page_position (view, orientation);
 624                         break;
 625                 case SCROLL_TO_CENTER:
 626                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 627                                            0, adjustment->upper - adjustment->page_size);
 628                         gtk_adjustment_set_value (adjustment, (int)new_value);
 629                         break;
 630         }
 631
 632         gtk_adjustment_changed (adjustment);
 633 }
 634
 635 static void
 636 view_update_range_and_current_page (EvView *view)
 637 {
 638         gint start = view->start_page;
 639         gint end = view->end_page;
 640
 641         /* Presentation trumps all other modes */
 642         if (view->presentation) {
 643                 view->start_page = view->current_page;
 644                 view->end_page = view->current_page;
 645         } else if (view->continuous) {
 646                 GdkRectangle current_area, unused, page_area;
 647                 GtkBorder border;
 648                 gboolean found = FALSE;
 649                 gint area_max = -1, area;
 650                 gint best_current_page = -1;
 651                 int i, j = 0;
 652
 653                 if (!(view->vadjustment && view->hadjustment))
 654                         return;
 655
 656                 current_area.x = view->hadjustment->value;
 657                 current_area.width = view->hadjustment->page_size;
 658                 current_area.y = view->vadjustment->value;
 659                 current_area.height = view->vadjustment->page_size;
 660
 661                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 662
 663                         get_page_extents (view, i, &page_area, &border);
 664
 665                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 666                                 area = unused.width * unused.height;
 667
 668                                 if (!found) {
 669                                         area_max = area;
 670                                         view->start_page = i;
 671                                         found = TRUE;
 672                                         best_current_page = i;
 673                                 }
 674                                 if (area > area_max) {
 675                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 676                                         area_max = area;
 677                                 }
 678
 679                                 view->end_page = i;
 680                                 j = 0;
 681                         } else if (found && view->current_page <= view->end_page) {
 682                                 if (view->dual_page && j < 1) {
 683                                         /* In dual mode  we stop searching
 684                                          * after two consecutive non-visible pages.
 685                                          */
 686                                         j++;
 687                                         continue;
 688                                 }
 689                                 break;
 690                         }
 691                 }
 692
 693                 if (view->pending_scroll == SCROLL_TO_KEEP_POSITION) {
 694                         best_current_page = MAX (best_current_page, view->start_page);
 695
 696                         if (view->current_page != best_current_page) {
 697                                 view->current_page = best_current_page;
 698                                 ev_document_model_set_page (view->model, best_current_page);
 699                         }
 700                 }
 701         } else if (view->dual_page) {
 702                 if (view->current_page % 2 == get_dual_even_left (view)) {
 703                         view->start_page = view->current_page;
 704                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 705                                 view->end_page = view->start_page + 1;
 706                         else
 707                                 view->end_page = view->start_page;
 708                 } else {
 709                         if (view->current_page < 1)
 710                                 view->start_page = view->current_page;
 711                         else
 712                                 view->start_page = view->current_page - 1;
 713                         view->end_page = view->current_page;
 714                 }
 715         } else {
 716                 view->start_page = view->current_page;
 717                 view->end_page = view->current_page;
 718         }
 719
 720         if (start != view->start_page || end != view->end_page) {
 721                 gint i;
 722
 723                 for (i = start; i < view->start_page && start != -1; i++) {
 724                         hide_annotation_windows (view, i);
 725                 }
 726
 727                 for (i = end; i > view->end_page && end != -1; i--) {
 728                         hide_annotation_windows (view, i);
 729                 }
 730         }
 731
 732         ev_page_cache_set_page_range (view->page_cache,
 733                                       view->start_page,
 734                                       view->end_page);
 735         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 736                                         view->start_page,
 737                                         view->end_page,
 738                                         view->rotation,
 739                                         view->scale,
 740                                         view->selection_info.selections);
 741
 742         if (ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page))
 743             gtk_widget_queue_draw (GTK_WIDGET (view));
 744 }
 745
 746 static void
 747 set_scroll_adjustment (EvView *view,
 748                        GtkOrientation  orientation,
 749                        GtkAdjustment  *adjustment)
 750 {
 751         GtkAdjustment **to_set;
 752
 753         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 754                 to_set = &view->hadjustment;
 755         else
 756                 to_set = &view->vadjustment;
 757
 758         if (*to_set != adjustment) {
 759                 if (*to_set) {
 760                         g_signal_handlers_disconnect_by_func (*to_set,
 761                                                               (gpointer) on_adjustment_value_changed,
 762                                                               view);
 763                         g_object_unref (*to_set);
 764                 }
 765
 766                 *to_set = adjustment;
 767                 view_set_adjustment_values (view, orientation);
 768
 769                 if (*to_set) {
 770                         g_object_ref (*to_set);
 771                         g_signal_connect (*to_set, "value_changed",
 772                                           G_CALLBACK (on_adjustment_value_changed), view);
 773                 }
 774         }
 775 }
 776
 777 static void
 778 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 779                                 GtkAdjustment  *hadjustment,
 780                                 GtkAdjustment  *vadjustment)
 781 {
 782         EvView *view = EV_VIEW (layout);
 783
 784         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 785         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 786
 787         on_adjustment_value_changed (NULL, view);
 788 }
 789
 790 static void
 791 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 792                            guint           keyval,
 793                            GdkModifierType modifiers,
 794                            GtkScrollType   scroll,
 795                            gboolean        horizontal)
 796 {
 797   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 798
 799   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 800                                 "binding_activated", 2,
 801                                 GTK_TYPE_SCROLL_TYPE, scroll,
 802                                 G_TYPE_BOOLEAN, horizontal);
 803   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 804                                 "binding_activated", 2,
 805                                 GTK_TYPE_SCROLL_TYPE, scroll,
 806                                 G_TYPE_BOOLEAN, horizontal);
 807 }
 808
 809 static gdouble
 810 compute_scroll_increment (EvView        *view,
 811                           GtkScrollType  scroll)
 812 {
 813         GtkWidget *widget = GTK_WIDGET (view);
 814         GtkAdjustment *adjustment = view->vadjustment;
 815         GdkRegion *text_region, *region;
 816         gint page;
 817         GdkRectangle rect;
 818         EvRectangle doc_rect;
 819         GdkRectangle page_area;
 820         GtkBorder border;
 821         GdkRectangle *recs;
 822         gint n_recs;
 823         gdouble fraction = 1.0;
 824
 825         if (scroll != GTK_SCROLL_PAGE_BACKWARD && scroll != GTK_SCROLL_PAGE_FORWARD)
 826                 return adjustment->page_size;
 827
 828         page = scroll == GTK_SCROLL_PAGE_BACKWARD ? view->start_page : view->end_page;
 829
 830         text_region = ev_page_cache_get_text_mapping (view->page_cache, page);
 831         if (!text_region || gdk_region_empty (text_region))
 832                 return adjustment->page_size;
 833
 834         get_page_extents (view, page, &page_area, &border);
 835         rect.x = page_area.x + view->scroll_x;
 836         rect.y = view->scroll_y + (scroll == GTK_SCROLL_PAGE_BACKWARD ? 5 : widget->allocation.height - 5);
 837         rect.width = page_area.width;
 838         rect.height = 1;
 839         view_rect_to_doc_rect (view, &rect, &page_area, &doc_rect);
 840
 841         /* Convert the doc rectangle into a GdkRectangle */
 842         rect.x = doc_rect.x1;
 843         rect.y = doc_rect.y1;
 844         rect.width = doc_rect.x2 - doc_rect.x1;
 845         rect.height = MAX (1, doc_rect.y2 - doc_rect.y1);
 846         region = gdk_region_rectangle (&rect);
 847
 848         gdk_region_intersect (region, text_region);
 849         gdk_region_get_rectangles (region, &recs, &n_recs);
 850         gdk_region_destroy (region);
 851         if (n_recs > 0) {
 852                 EvRenderContext *rc;
 853                 EvPage  *ev_page;
 854
 855                 ev_page = ev_document_get_page (view->document, page);
 856                 rc = ev_render_context_new (ev_page, view->rotation, view->scale);
 857                 g_object_unref (ev_page);
 858                 /* Get the selection region to know the height of the line */
 859                 doc_rect.x1 = doc_rect.x2 = recs[0].x + 0.5;
 860                 doc_rect.y1 = doc_rect.y2 = recs[0].y + 0.5;
 861
 862                 ev_document_doc_mutex_lock ();
 863                 region = ev_selection_get_selection_region (EV_SELECTION (view->document),
 864                                                             rc, EV_SELECTION_STYLE_LINE,
 865                                                             &doc_rect);
 866                 ev_document_doc_mutex_unlock ();
 867
 868                 g_object_unref (rc);
 869                 g_free (recs);
 870                 gdk_region_get_rectangles (region, &recs, &n_recs);
 871                 gdk_region_destroy (region);
 872                 if (n_recs > 0) {
 873                         fraction = 1 - (recs[0].height / adjustment->page_size);
 874                 }
 875                 g_free (recs);
 876         }
 877
 878         return adjustment->page_size * fraction;
 879
 880 }
 881
 882 void
 883 ev_view_scroll (EvView        *view,
 884                 GtkScrollType  scroll,
 885                 gboolean       horizontal)
 886 {
 887         GtkAdjustment *adjustment;
 888         double value, increment;
 889         gboolean first_page = FALSE;
 890         gboolean last_page = FALSE;
 891
 892         view->jump_to_find_result = FALSE;
 893
 894         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 895                 switch (scroll) {
 896                         case GTK_SCROLL_PAGE_BACKWARD:
 897                         case GTK_SCROLL_STEP_BACKWARD:
 898                                 ev_view_previous_page (view);
 899                                 break;
 900                         case GTK_SCROLL_PAGE_FORWARD:
 901                         case GTK_SCROLL_STEP_FORWARD:
 902                                 ev_view_next_page (view);
 903                                 break;
 904                         default:
 905                                 break;
 906                 }
 907                 return;
 908         }
 909
 910         /* Assign values for increment and vertical adjustment */
 911         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 912         value = adjustment->value;
 913
 914         /* Assign boolean for first and last page */
 915         if (view->current_page == 0)
 916                 first_page = TRUE;
 917         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 918                 last_page = TRUE;
 919
 920         switch (scroll) {
 921                 case GTK_SCROLL_PAGE_BACKWARD:
 922                         /* Do not jump backwards if at the first page */
 923                         if (value == (adjustment->lower) && first_page) {
 924                                 /* Do nothing */
 925                                 /* At the top of a page, assign the upper bound limit of previous page */
 926                         } else if (value == (adjustment->lower)) {
 927                                 value = adjustment->upper - adjustment->page_size;
 928                                 ev_view_previous_page (view);
 929                                 /* Jump to the top */
 930                         } else {
 931                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_BACKWARD);
 932                                 value = MAX (value - increment, adjustment->lower);
 933                         }
 934                         break;
 935                 case GTK_SCROLL_PAGE_FORWARD:
 936                         /* Do not jump forward if at the last page */
 937                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 938                                 /* Do nothing */
 939                         /* At the bottom of a page, assign the lower bound limit of next page */
 940                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 941                                 value = 0;
 942                                 ev_view_next_page (view);
 943                         /* Jump to the bottom */
 944                         } else {
 945                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_FORWARD);
 946                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 947                         }
 948                         break;
 949                 case GTK_SCROLL_STEP_BACKWARD:
 950                         value -= adjustment->step_increment;
 951                         break;
 952                 case GTK_SCROLL_STEP_FORWARD:
 953                         value += adjustment->step_increment;
 954                         break;
 955                 case GTK_SCROLL_STEP_DOWN:
 956                         value -= adjustment->step_increment / 10;
 957                         break;
 958                 case GTK_SCROLL_STEP_UP:
 959                         value += adjustment->step_increment / 10;
 960                         break;
 961                 default:
 962                         break;
 963         }
 964
 965         value = CLAMP (value, adjustment->lower,
 966                        adjustment->upper - adjustment->page_size);
 967
 968         gtk_adjustment_set_value (adjustment, value);
 969 }
 970
 971 #define MARGIN 5
 972
 973 static void
 974 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 975 {
 976         GtkWidget *widget = GTK_WIDGET (view);
 977         GtkAdjustment *adjustment;
 978         int value;
 979
 980         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 981
 982         adjustment = view->vadjustment;
 983
 984         if (rect->y < adjustment->value) {
 985                 value = MAX (adjustment->lower, rect->y - MARGIN);
 986                 gtk_adjustment_set_value (view->vadjustment, value);
 987         } else if (rect->y + rect->height >
 988                    adjustment->value + widget->allocation.height) {
 989                 value = MIN (adjustment->upper, rect->y + rect->height -
 990                              widget->allocation.height + MARGIN);
 991                 gtk_adjustment_set_value (view->vadjustment, value);
 992         }
 993
 994         adjustment = view->hadjustment;
 995
 996         if (rect->x < adjustment->value) {
 997                 value = MAX (adjustment->lower, rect->x - MARGIN);
 998                 gtk_adjustment_set_value (view->hadjustment, value);
 999         } else if (rect->x + rect->height >
1000                    adjustment->value + widget->allocation.width) {
1001                 value = MIN (adjustment->upper, rect->x + rect->width -
1002                              widget->allocation.width + MARGIN);
1003                 gtk_adjustment_set_value (view->hadjustment, value);
1004         }
1005
1006         gtk_widget_queue_resize (GTK_WIDGET (view));
1007 }
1008
1009 /*** Geometry computations ***/
1010
1011 static void
1012 compute_border (EvView *view, int width, int height, GtkBorder *border)
1013 {
1014         if (view->presentation) {
1015                 border->left = 0;
1016                 border->right = 0;
1017                 border->top = 0;
1018                 border->bottom = 0;
1019         } else {
1020                 ev_document_misc_get_page_border_size (width, height, border);
1021         }
1022 }
1023
1024 void
1025 _get_page_size_for_scale_and_rotation (EvDocument *document,
1026                                        gint        page,
1027                                        gdouble     scale,
1028                                        gint        rotation,
1029                                        gint       *page_width,
1030                                        gint       *page_height)
1031 {
1032         gdouble w, h;
1033         gint    width, height;
1034
1035         ev_document_get_page_size (document, page, &w, &h);
1036
1037         width = (gint)(w * scale + 0.5);
1038         height = (gint)(h * scale + 0.5);
1039
1040         if (page_width)
1041                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
1042         if (page_height)
1043                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
1044 }
1045
1046 static void
1047 ev_view_get_page_size (EvView *view,
1048                        gint    page,
1049                        gint   *page_width,
1050                        gint   *page_height)
1051 {
1052         _get_page_size_for_scale_and_rotation (view->document,
1053                                                page,
1054                                                view->scale,
1055                                                view->rotation,
1056                                                page_width,
1057                                                page_height);
1058 }
1059
1060 static void
1061 ev_view_get_max_page_size (EvView *view,
1062                            gint   *max_width,
1063                            gint   *max_height)
1064 {
1065         double w, h;
1066         gint   width, height;
1067
1068         ev_document_get_max_page_size (view->document, &w, &h);
1069
1070         width = (gint)(w * view->scale + 0.5);
1071         height = (gint)(h * view->scale + 0.5);
1072
1073         if (max_width)
1074                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
1075         if (max_height)
1076                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
1077 }
1078
1079 static void
1080 get_page_y_offset (EvView *view, int page, int *y_offset)
1081 {
1082         int max_width, offset;
1083         GtkBorder border;
1084
1085         g_return_if_fail (y_offset != NULL);
1086
1087         ev_view_get_max_page_size (view, &max_width, NULL);
1088         compute_border (view, max_width, max_width, &border);
1089
1090         if (view->dual_page) {
1091                 ev_view_get_height_to_page (view, page, NULL, &offset);
1092                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
1093                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
1094         } else {
1095                 ev_view_get_height_to_page (view, page, &offset, NULL);
1096                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
1097         }
1098
1099         *y_offset = offset;
1100         return;
1101 }
1102
1103 static gboolean
1104 get_page_extents (EvView       *view,
1105                   gint          page,
1106                   GdkRectangle *page_area,
1107                   GtkBorder    *border)
1108 {
1109         GtkWidget *widget;
1110         int width, height;
1111
1112         widget = GTK_WIDGET (view);
1113
1114         /* Get the size of the page */
1115         ev_view_get_page_size (view, page, &width, &height);
1116         compute_border (view, width, height, border);
1117         page_area->width = width + border->left + border->right;
1118         page_area->height = height + border->top + border->bottom;
1119
1120         if (view->presentation) {
1121                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
1122                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
1123         } else if (view->continuous) {
1124                 gint max_width;
1125                 gint x, y;
1126
1127                 ev_view_get_max_page_size (view, &max_width, NULL);
1128                 max_width = max_width + border->left + border->right;
1129                 /* Get the location of the bounding box */
1130                 if (view->dual_page) {
1131                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1132                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1133                         if (page % 2 == get_dual_even_left (view))
1134                                 x = x + (max_width - width - border->left - border->right);
1135                 } else {
1136                         x = view->spacing;
1137                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
1138                 }
1139
1140                 get_page_y_offset (view, page, &y);
1141
1142                 page_area->x = x;
1143                 page_area->y = y;
1144         } else {
1145                 gint x, y;
1146                 if (view->dual_page) {
1147                         gint width_2, height_2;
1148                         gint max_width = width;
1149                         gint max_height = height;
1150                         GtkBorder overall_border;
1151                         gint other_page;
1152
1153                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1154
1155                         /* First, we get the bounding box of the two pages */
1156                         if (other_page < ev_document_get_n_pages (view->document)
1157                             && (0 <= other_page)) {
1158                                 ev_view_get_page_size (view, other_page,
1159                                                        &width_2, &height_2);
1160                                 if (width_2 > width)
1161                                         max_width = width_2;
1162                                 if (height_2 > height)
1163                                         max_height = height_2;
1164                         }
1165                         compute_border (view, max_width, max_height, &overall_border);
1166
1167                         /* Find the offsets */
1168                         x = view->spacing;
1169                         y = view->spacing;
1170
1171                         /* Adjust for being the left or right page */
1172                         if (page % 2 == get_dual_even_left (view))
1173                                 x = x + max_width - width;
1174                         else
1175                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1176
1177                         y = y + (max_height - height)/2;
1178
1179                         /* Adjust for extra allocation */
1180                         x = x + MAX (0, widget->allocation.width -
1181                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1182                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
1183                 } else {
1184                         x = view->spacing;
1185                         y = view->spacing;
1186
1187                         /* Adjust for extra allocation */
1188                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1189                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1190                 }
1191
1192                 page_area->x = x;
1193                 page_area->y = y;
1194         }
1195
1196         return TRUE;
1197 }
1198
1199 static void
1200 get_doc_page_size (EvView  *view,
1201                    gint     page,
1202                    gdouble *width,
1203                    gdouble *height)
1204 {
1205         double w, h;
1206
1207         ev_document_get_page_size (view->document, page, &w, &h);
1208         if (view->rotation == 0 || view->rotation == 180) {
1209                 if (width) *width = w;
1210                 if (height) *height = h;
1211         } else {
1212                 if (width) *width = h;
1213                 if (height) *height = w;
1214         }
1215 }
1216
1217 static void
1218 view_point_to_doc_point (EvView *view,
1219                          GdkPoint *view_point,
1220                          GdkRectangle *page_area,
1221                          double  *doc_point_x,
1222                          double  *doc_point_y)
1223 {
1224         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1225         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1226 }
1227
1228 static void
1229 view_rect_to_doc_rect (EvView *view,
1230                        GdkRectangle *view_rect,
1231                        GdkRectangle *page_area,
1232                        EvRectangle  *doc_rect)
1233 {
1234         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1235         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1236         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1237         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1238 }
1239
1240 static void
1241 doc_point_to_view_point (EvView       *view,
1242                          int           page,
1243                          EvPoint      *doc_point,
1244                          GdkPoint     *view_point)
1245 {
1246         GdkRectangle page_area;
1247         GtkBorder border;
1248         double x, y, view_x, view_y;
1249         gdouble width, height;
1250
1251         get_doc_page_size (view, page, &width, &height);
1252
1253         if (view->rotation == 0) {
1254                 x = doc_point->x;
1255                 y = doc_point->y;
1256         } else if (view->rotation == 90) {
1257                 x = width - doc_point->y;
1258                 y = doc_point->x;
1259         } else if (view->rotation == 180) {
1260                 x = width - doc_point->x;
1261                 y = height - doc_point->y;
1262         } else if (view->rotation == 270) {
1263                 x = doc_point->y;
1264                 y = height - doc_point->x;
1265         } else {
1266                 g_assert_not_reached ();
1267         }
1268
1269         get_page_extents (view, page, &page_area, &border);
1270
1271         view_x = CLAMP (x * view->scale, 0, page_area.width);
1272         view_y = CLAMP (y * view->scale, 0, page_area.height);
1273         view_point->x = view_x + page_area.x;
1274         view_point->y = view_y + page_area.y;
1275 }
1276
1277 static void
1278 doc_rect_to_view_rect (EvView       *view,
1279                        int           page,
1280                        EvRectangle  *doc_rect,
1281                        GdkRectangle *view_rect)
1282 {
1283         GdkRectangle page_area;
1284         GtkBorder border;
1285         double x, y, w, h;
1286         gdouble width, height;
1287
1288         get_doc_page_size (view, page, &width, &height);
1289
1290         if (view->rotation == 0) {
1291                 x = doc_rect->x1;
1292                 y = doc_rect->y1;
1293                 w = doc_rect->x2 - doc_rect->x1;
1294                 h = doc_rect->y2 - doc_rect->y1;
1295         } else if (view->rotation == 90) {
1296                 x = width - doc_rect->y2;
1297                 y = doc_rect->x1;
1298                 w = doc_rect->y2 - doc_rect->y1;
1299                 h = doc_rect->x2 - doc_rect->x1;
1300         } else if (view->rotation == 180) {
1301                 x = width - doc_rect->x2;
1302                 y = height - doc_rect->y2;
1303                 w = doc_rect->x2 - doc_rect->x1;
1304                 h = doc_rect->y2 - doc_rect->y1;
1305         } else if (view->rotation == 270) {
1306                 x = doc_rect->y1;
1307                 y = height - doc_rect->x2;
1308                 w = doc_rect->y2 - doc_rect->y1;
1309                 h = doc_rect->x2 - doc_rect->x1;
1310         } else {
1311                 g_assert_not_reached ();
1312         }
1313
1314         get_page_extents (view, page, &page_area, &border);
1315
1316         view_rect->x = x * view->scale + page_area.x;
1317         view_rect->y = y * view->scale + page_area.y;
1318         view_rect->width = w * view->scale;
1319         view_rect->height = h * view->scale;
1320 }
1321
1322 static gboolean
1323 get_dual_even_left (EvView *view)
1324 {
1325         return (ev_document_get_n_pages (view->document) > 2);
1326 }
1327
1328 static void
1329 find_page_at_location (EvView  *view,
1330                        gdouble  x,
1331                        gdouble  y,
1332                        gint    *page,
1333                        gint    *x_offset,
1334                        gint    *y_offset)
1335 {
1336         int i;
1337
1338         if (view->document == NULL)
1339                 return;
1340
1341         g_assert (page);
1342         g_assert (x_offset);
1343         g_assert (y_offset);
1344
1345         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1346                 GdkRectangle page_area;
1347                 GtkBorder border;
1348
1349                 if (! get_page_extents (view, i, &page_area, &border))
1350                         continue;
1351
1352                 if ((x >= page_area.x + border.left) &&
1353                     (x < page_area.x + page_area.width - border.right) &&
1354                     (y >= page_area.y + border.top) &&
1355                     (y < page_area.y + page_area.height - border.bottom)) {
1356                         *page = i;
1357                         *x_offset = x - (page_area.x + border.left);
1358                         *y_offset = y - (page_area.y + border.top);
1359                         return;
1360                 }
1361         }
1362
1363         *page = -1;
1364 }
1365
1366 static gboolean
1367 location_in_text (EvView  *view,
1368                   gdouble  x,
1369                   gdouble  y)
1370 {
1371         GdkRegion *region;
1372         gint page = -1;
1373         gint x_offset = 0, y_offset = 0;
1374
1375         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1376
1377         if (page == -1)
1378                 return FALSE;
1379
1380         region = ev_page_cache_get_text_mapping (view->page_cache, page);
1381
1382         if (region)
1383                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1384         else
1385                 return FALSE;
1386 }
1387
1388 static int
1389 ev_view_get_width (EvView *view)
1390 {
1391         return GTK_WIDGET (view)->allocation.width;
1392 }
1393
1394 static int
1395 ev_view_get_height (EvView *view)
1396 {
1397         return GTK_WIDGET (view)->allocation.height;
1398 }
1399
1400 static gboolean
1401 location_in_selected_text (EvView  *view,
1402                            gdouble  x,
1403                            gdouble  y)
1404 {
1405         gint page = -1;
1406         gint x_offset = 0, y_offset = 0;
1407         EvViewSelection *selection;
1408         GList *l = NULL;
1409
1410         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1411                 selection = (EvViewSelection *)l->data;
1412
1413                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1414
1415                 if (page != selection->page)
1416                         continue;
1417
1418                 if (selection->covered_region &&
1419                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1420                         return TRUE;
1421         }
1422
1423         return FALSE;
1424 }
1425
1426 static gboolean
1427 get_doc_point_from_offset (EvView *view,
1428                            gint    page,
1429                            gint    x_offset,
1430                            gint    y_offset,
1431                            gint   *x_new,
1432                            gint   *y_new)
1433 {
1434         gdouble width, height;
1435         double x, y;
1436
1437         get_doc_page_size (view, page, &width, &height);
1438
1439         x_offset = x_offset / view->scale;
1440         y_offset = y_offset / view->scale;
1441
1442         if (view->rotation == 0) {
1443                 x = x_offset;
1444                 y = y_offset;
1445         } else if (view->rotation == 90) {
1446                 x = y_offset;
1447                 y = width - x_offset;
1448         } else if (view->rotation == 180) {
1449                 x = width - x_offset;
1450                 y = height - y_offset;
1451         } else if (view->rotation == 270) {
1452                 x = height - y_offset;
1453                 y = x_offset;
1454         } else {
1455                 g_assert_not_reached ();
1456         }
1457
1458         *x_new = x;
1459         *y_new = y;
1460
1461         return TRUE;
1462 }
1463
1464 static gboolean
1465 get_doc_point_from_location (EvView  *view,
1466                              gdouble  x,
1467                              gdouble  y,
1468                              gint    *page,
1469                              gint    *x_new,
1470                              gint    *y_new)
1471 {
1472         gint x_offset = 0, y_offset = 0;
1473
1474         x += view->scroll_x;
1475         y += view->scroll_y;
1476         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1477         if (*page == -1)
1478                 return FALSE;
1479
1480         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1481 }
1482
1483 static void
1484 ev_view_get_area_from_mapping (EvView       *view,
1485                                guint         page,
1486                                GList        *mapping_list,
1487                                gconstpointer data,
1488                                GdkRectangle *area)
1489 {
1490         EvMapping *mapping;
1491
1492         mapping = ev_mapping_list_find (mapping_list, data);
1493         doc_rect_to_view_rect (view, page, &mapping->area, area);
1494         area->x -= view->scroll_x;
1495         area->y -= view->scroll_y;
1496 }
1497
1498
1499 /*** Hyperref ***/
1500 static EvLink *
1501 ev_view_get_link_at_location (EvView  *view,
1502                               gdouble  x,
1503                               gdouble  y)
1504 {
1505         gint page = -1;
1506         gint x_new = 0, y_new = 0;
1507         GList *link_mapping;
1508
1509         if (!EV_IS_DOCUMENT_LINKS (view->document))
1510                 return NULL;
1511
1512         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1513                 return NULL;
1514
1515         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
1516
1517         if (link_mapping)
1518                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1519         else
1520                 return NULL;
1521 }
1522
1523 static void
1524 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1525 {
1526         EvPoint doc_point;
1527         gdouble zoom, left, top;
1528         gboolean change_left, change_top;
1529
1530         left = ev_link_dest_get_left (dest, &change_left);
1531         top = ev_link_dest_get_top (dest, &change_top);
1532
1533         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1534                                        ev_link_dest_get_bottom (dest) - top,
1535                                        ev_view_get_width (view),
1536                                        ev_view_get_height (view));
1537
1538         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1539         ev_document_model_set_scale (view->model, zoom);
1540
1541         doc_point.x = change_left ? left : 0;
1542         doc_point.y = change_top ? top : 0;
1543         view->pending_point = doc_point;
1544
1545         ev_view_change_page (view, ev_link_dest_get_page (dest), TRUE);
1546 }
1547
1548 static void
1549 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1550 {
1551         EvPoint doc_point;
1552         gdouble doc_width, doc_height;
1553         gint page;
1554         double zoom, left;
1555         gboolean change_left;
1556
1557         page = ev_link_dest_get_page (dest);
1558         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1559
1560         left = ev_link_dest_get_left (dest, &change_left);
1561         doc_point.x = change_left ? left : 0;
1562         doc_point.y = 0;
1563
1564         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1565                                          ev_view_get_width (view),
1566                                          ev_view_get_height (view));
1567
1568         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1569         ev_document_model_set_scale (view->model, zoom);
1570
1571         view->pending_point = doc_point;
1572
1573         ev_view_change_page (view, page, TRUE);
1574 }
1575
1576 static void
1577 goto_fith_dest (EvView *view, EvLinkDest *dest)
1578 {
1579         EvPoint doc_point;
1580         gdouble doc_width, doc_height;
1581         gint page;
1582         gdouble zoom, top;
1583         gboolean change_top;
1584
1585         page = ev_link_dest_get_page (dest);
1586         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1587
1588         top = ev_link_dest_get_top (dest, &change_top);
1589
1590         doc_point.x = 0;
1591         doc_point.y = change_top ? top : 0;
1592
1593         zoom = zoom_for_size_fit_width (doc_width, top,
1594                                         ev_view_get_width (view),
1595                                         ev_view_get_height (view));
1596
1597         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1598         ev_document_model_set_scale (view->model, zoom);
1599
1600         view->pending_point = doc_point;
1601
1602         ev_view_change_page (view, page, TRUE);
1603 }
1604
1605 static void
1606 goto_fit_dest (EvView *view, EvLinkDest *dest)
1607 {
1608         double zoom;
1609         gdouble doc_width, doc_height;
1610         int page;
1611
1612         page = ev_link_dest_get_page (dest);
1613         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1614
1615         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1616                                        ev_view_get_width (view),
1617                                        ev_view_get_height (view));
1618
1619         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1620         ev_document_model_set_scale (view->model, zoom);
1621
1622         ev_view_change_page (view, page, TRUE);
1623 }
1624
1625 static void
1626 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1627 {
1628         EvPoint doc_point;
1629         gint page;
1630         gdouble zoom, left, top;
1631         gboolean change_zoom, change_left, change_top;
1632
1633         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1634         page = ev_link_dest_get_page (dest);
1635
1636         if (change_zoom && zoom > 1) {
1637                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1638                 ev_document_model_set_scale (view->model, zoom);
1639         }
1640
1641         left = ev_link_dest_get_left (dest, &change_left);
1642         top = ev_link_dest_get_top (dest, &change_top);
1643
1644         doc_point.x = change_left ? left : 0;
1645         doc_point.y = change_top ? top : 0;
1646         view->pending_point = doc_point;
1647
1648         ev_view_change_page (view, page, TRUE);
1649 }
1650
1651 static void
1652 goto_dest (EvView *view, EvLinkDest *dest)
1653 {
1654         EvLinkDestType type;
1655         int page, n_pages, current_page;
1656
1657         page = ev_link_dest_get_page (dest);
1658         n_pages = ev_document_get_n_pages (view->document);
1659
1660         if (page < 0 || page >= n_pages)
1661                 return;
1662
1663         current_page = view->current_page;
1664
1665         type = ev_link_dest_get_dest_type (dest);
1666
1667         switch (type) {
1668                 case EV_LINK_DEST_TYPE_PAGE:
1669                         ev_document_model_set_page (view->model, page);
1670                         break;
1671                 case EV_LINK_DEST_TYPE_FIT:
1672                         goto_fit_dest (view, dest);
1673                         break;
1674                 case EV_LINK_DEST_TYPE_FITH:
1675                         goto_fith_dest (view, dest);
1676                         break;
1677                 case EV_LINK_DEST_TYPE_FITV:
1678                         goto_fitv_dest (view, dest);
1679                         break;
1680                 case EV_LINK_DEST_TYPE_FITR:
1681                         goto_fitr_dest (view, dest);
1682                         break;
1683                 case EV_LINK_DEST_TYPE_XYZ:
1684                         goto_xyz_dest (view, dest);
1685                         break;
1686                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1687                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1688                         break;
1689                 default:
1690                         g_assert_not_reached ();
1691         }
1692
1693         if (current_page != view->current_page)
1694                 ev_document_model_set_page (view->model, view->current_page);
1695 }
1696
1697 static void
1698 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1699 {
1700         EvLinkDestType type;
1701
1702         type = ev_link_dest_get_dest_type (dest);
1703
1704         if (type == EV_LINK_DEST_TYPE_NAMED) {
1705                 EvLinkDest  *dest2;
1706                 const gchar *named_dest;
1707
1708                 named_dest = ev_link_dest_get_named_dest (dest);
1709                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1710                                                           named_dest);
1711                 if (dest2) {
1712                         goto_dest (view, dest2);
1713                         g_object_unref (dest2);
1714                 }
1715
1716                 return;
1717         }
1718
1719         goto_dest (view, dest);
1720 }
1721
1722 void
1723 ev_view_handle_link (EvView *view, EvLink *link)
1724 {
1725         EvLinkAction    *action = NULL;
1726         EvLinkActionType type;
1727
1728         action = ev_link_get_action (link);
1729         if (!action)
1730                 return;
1731
1732         type = ev_link_action_get_action_type (action);
1733
1734         switch (type) {
1735                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1736                         EvLinkDest *dest;
1737
1738                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1739
1740                         dest = ev_link_action_get_dest (action);
1741                         ev_view_goto_dest (view, dest);
1742                 }
1743                         break;
1744                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1745                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1746                 case EV_LINK_ACTION_TYPE_LAUNCH:
1747                 case EV_LINK_ACTION_TYPE_NAMED:
1748                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1749                         break;
1750         }
1751 }
1752
1753 gchar *
1754 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1755 {
1756         EvLinkDestType type;
1757         gchar *msg = NULL;
1758
1759         type = ev_link_dest_get_dest_type (dest);
1760
1761         switch (type) {
1762                 case EV_LINK_DEST_TYPE_NAMED: {
1763                         EvLinkDest  *dest2;
1764                         const gchar *named_dest;
1765
1766                         named_dest = ev_link_dest_get_named_dest (dest);
1767                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1768                                                                   named_dest);
1769                         if (dest2) {
1770                                 msg = ev_document_get_page_label (view->document,
1771                                                                   ev_link_dest_get_page (dest2));
1772                                 g_object_unref (dest2);
1773                         }
1774                 }
1775
1776                         break;
1777                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1778                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1779                 }
1780                         break;
1781                 default:
1782                         msg = ev_document_get_page_label (view->document,
1783                                                           ev_link_dest_get_page (dest));
1784         }
1785
1786         return msg;
1787 }
1788
1789 static char *
1790 tip_from_action_named (EvLinkAction *action)
1791 {
1792         const gchar *name = ev_link_action_get_name (action);
1793
1794         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1795                 return g_strdup (_("Go to first page"));
1796         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1797                 return g_strdup (_("Go to previous page"));
1798         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1799                 return g_strdup (_("Go to next page"));
1800         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1801                 return g_strdup (_("Go to last page"));
1802         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1803                 return g_strdup (_("Go to page"));
1804         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1805                 return g_strdup (_("Find"));
1806         }
1807
1808         return NULL;
1809 }
1810
1811 static char *
1812 tip_from_link (EvView *view, EvLink *link)
1813 {
1814         EvLinkAction *action;
1815         EvLinkActionType type;
1816         char *msg = NULL;
1817         char *page_label;
1818         const char *title;
1819
1820         action = ev_link_get_action (link);
1821         title = ev_link_get_title (link);
1822
1823         if (!action)
1824                 return title ? g_strdup (title) : NULL;
1825
1826         type = ev_link_action_get_action_type (action);
1827
1828         switch (type) {
1829                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1830                         page_label = ev_view_page_label_from_dest (view,
1831                                                                    ev_link_action_get_dest (action));
1832                         if (page_label) {
1833                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1834                                 g_free (page_label);
1835                         }
1836                         break;
1837                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1838                         if (title) {
1839                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1840                                                        ev_link_action_get_filename (action));
1841                         } else {
1842                                 msg = g_strdup_printf (_("Go to file “%s”"),
1843                                                        ev_link_action_get_filename (action));
1844                         }
1845                         break;
1846                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1847                         msg = g_strdup (ev_link_action_get_uri (action));
1848                         break;
1849                 case EV_LINK_ACTION_TYPE_LAUNCH:
1850                         msg = g_strdup_printf (_("Launch %s"),
1851                                                ev_link_action_get_filename (action));
1852                         break;
1853                 case EV_LINK_ACTION_TYPE_NAMED:
1854                         msg = tip_from_action_named (action);
1855                         break;
1856                 default:
1857                         if (title)
1858                                 msg = g_strdup (title);
1859                         break;
1860         }
1861
1862         return msg;
1863 }
1864
1865 static void
1866 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1867 {
1868         EvLink       *link;
1869         EvFormField  *field;
1870         EvAnnotation *annot = NULL;
1871
1872         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1873                 return;
1874
1875         if (view->drag_info.in_drag) {
1876                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1877                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1878                 return;
1879         }
1880
1881         if (view->scroll_info.autoscrolling) {
1882                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1883                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1884                 return;
1885         }
1886
1887         link = ev_view_get_link_at_location (view, x, y);
1888         if (link) {
1889                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1890         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1891                 if (field->is_read_only) {
1892                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1893                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1894                             view->cursor == EV_VIEW_CURSOR_DRAG)
1895                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1896                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1897                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1898                 } else {
1899                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1900                 }
1901         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1902                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1903         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1904                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1905         } else {
1906                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1907                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1908                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1909                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1910                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1911         }
1912
1913         if (link || annot)
1914                 g_object_set (view, "has-tooltip", TRUE, NULL);
1915 }
1916
1917 /*** Images ***/
1918 static EvImage *
1919 ev_view_get_image_at_location (EvView  *view,
1920                                gdouble  x,
1921                                gdouble  y)
1922 {
1923         gint page = -1;
1924         gint x_new = 0, y_new = 0;
1925         GList *image_mapping;
1926
1927         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1928                 return NULL;
1929
1930         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1931                 return NULL;
1932
1933         image_mapping = ev_page_cache_get_image_mapping (view->page_cache, page);
1934
1935         if (image_mapping)
1936                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1937         else
1938                 return NULL;
1939 }
1940
1941 /*** Forms ***/
1942 static EvFormField *
1943 ev_view_get_form_field_at_location (EvView  *view,
1944                                     gdouble  x,
1945                                     gdouble  y)
1946 {
1947         gint page = -1;
1948         gint x_new = 0, y_new = 0;
1949         GList *forms_mapping;
1950
1951         if (!EV_IS_DOCUMENT_FORMS (view->document))
1952                 return NULL;
1953
1954         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1955                 return NULL;
1956
1957         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache, page);
1958
1959         if (forms_mapping)
1960                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1961         else
1962                 return NULL;
1963 }
1964
1965 static GdkRegion *
1966 ev_view_form_field_get_region (EvView      *view,
1967                                EvFormField *field)
1968 {
1969         GdkRectangle view_area;
1970         GList       *forms_mapping;
1971
1972         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
1973                                                               field->page->index);
1974         ev_view_get_area_from_mapping (view, field->page->index,
1975                                        forms_mapping,
1976                                        field, &view_area);
1977
1978         return gdk_region_rectangle (&view_area);
1979 }
1980
1981 static gboolean
1982 ev_view_forms_remove_widgets (EvView *view)
1983 {
1984         ev_view_remove_all (view);
1985
1986         return FALSE;
1987 }
1988
1989 static void
1990 ev_view_form_field_destroy (GtkWidget *widget,
1991                             EvView    *view)
1992 {
1993         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1994 }
1995
1996 static GtkWidget *
1997 ev_view_form_field_button_create_widget (EvView      *view,
1998                                          EvFormField *field)
1999 {
2000         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
2001         GdkRegion         *field_region = NULL;
2002
2003         switch (field_button->type) {
2004                 case EV_FORM_FIELD_BUTTON_PUSH:
2005                         return NULL;
2006                 case EV_FORM_FIELD_BUTTON_CHECK:
2007                 case EV_FORM_FIELD_BUTTON_RADIO: {
2008                         gboolean  state;
2009                         GList    *forms_mapping, *l;
2010
2011                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
2012                                                                                field);
2013
2014                         /* FIXME: it actually depends on NoToggleToOff flags */
2015                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
2016                             state && field_button->state)
2017                                 return NULL;
2018
2019                         field_region = ev_view_form_field_get_region (view, field);
2020
2021                         /* For radio buttons and checkbox buttons that are in a set
2022                          * we need to update also the region for the current selected item
2023                          */
2024                         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2025                                                                               field->page->index);
2026                         for (l = forms_mapping; l; l = g_list_next (l)) {
2027                                 EvFormField *button = ((EvMapping *)(l->data))->data;
2028                                 GdkRegion   *button_region;
2029
2030                                 if (button->id == field->id)
2031                                         continue;
2032
2033                                 /* FIXME: only buttons in the same group should be updated */
2034                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
2035                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
2036                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
2037                                         continue;
2038
2039                                 button_region = ev_view_form_field_get_region (view, button);
2040                                 gdk_region_union (field_region, button_region);
2041                                 gdk_region_destroy (button_region);
2042                         }
2043
2044                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
2045                                                                        field, !state);
2046                         field_button->state = !state;
2047                 }
2048                         break;
2049         }
2050
2051         ev_view_reload_page (view, field->page->index, field_region);
2052         gdk_region_destroy (field_region);
2053
2054         return NULL;
2055 }
2056
2057 static void
2058 ev_view_form_field_text_save (EvView    *view,
2059                               GtkWidget *widget)
2060 {
2061         EvFormField *field;
2062
2063         if (!view->document)
2064                 return;
2065
2066         field = g_object_get_data (G_OBJECT (widget), "form-field");
2067
2068         if (field->changed) {
2069                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2070                 GdkRegion       *field_region;
2071
2072                 field_region = ev_view_form_field_get_region (view, field);
2073
2074                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
2075                                                             field, field_text->text);
2076                 field->changed = FALSE;
2077                 ev_view_reload_page (view, field->page->index, field_region);
2078                 gdk_region_destroy (field_region);
2079         }
2080 }
2081
2082 static void
2083 ev_view_form_field_text_changed (GtkWidget   *widget,
2084                                  EvFormField *field)
2085 {
2086         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2087         gchar           *text = NULL;
2088
2089         if (GTK_IS_ENTRY (widget)) {
2090                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
2091         } else if (GTK_IS_TEXT_BUFFER (widget)) {
2092                 GtkTextIter start, end;
2093
2094                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
2095                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
2096                                                  &start, &end, FALSE);
2097         }
2098
2099         if (!field_text->text ||
2100             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
2101                 g_free (field_text->text);
2102                 field_text->text = text;
2103                 field->changed = TRUE;
2104         }
2105 }
2106
2107 static GtkWidget *
2108 ev_view_form_field_text_create_widget (EvView      *view,
2109                                        EvFormField *field)
2110 {
2111         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2112         GtkWidget       *text = NULL;
2113         gchar           *txt;
2114
2115         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2116                                                           field);
2117
2118         switch (field_text->type) {
2119                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2120                         /* TODO */
2121                 case EV_FORM_FIELD_TEXT_NORMAL:
2122                         text = gtk_entry_new ();
2123                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2124                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2125                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2126
2127                         if (txt) {
2128                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2129                                 g_free (txt);
2130                         }
2131
2132                         g_signal_connect (text, "changed",
2133                                           G_CALLBACK (ev_view_form_field_text_changed),
2134                                           field);
2135                         g_signal_connect_after (text, "activate",
2136                                                 G_CALLBACK (ev_view_form_field_destroy),
2137                                                 view);
2138                         break;
2139                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2140                         GtkTextBuffer *buffer;
2141
2142                         text = gtk_text_view_new ();
2143                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2144
2145                         if (txt) {
2146                                 gtk_text_buffer_set_text (buffer, txt, -1);
2147                                 g_free (txt);
2148                         }
2149
2150                         g_signal_connect (buffer, "changed",
2151                                           G_CALLBACK (ev_view_form_field_text_changed),
2152                                           field);
2153                 }
2154                         break;
2155         }
2156
2157         g_object_weak_ref (G_OBJECT (text),
2158                            (GWeakNotify)ev_view_form_field_text_save,
2159                            view);
2160
2161         return text;
2162 }
2163
2164 static void
2165 ev_view_form_field_choice_save (EvView    *view,
2166                                 GtkWidget *widget)
2167 {
2168         EvFormField *field;
2169
2170         if (!view->document)
2171                 return;
2172
2173         field = g_object_get_data (G_OBJECT (widget), "form-field");
2174
2175         if (field->changed) {
2176                 GList             *l;
2177                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2178                 GdkRegion         *field_region;
2179
2180                 field_region = ev_view_form_field_get_region (view, field);
2181
2182                 if (field_choice->is_editable) {
2183                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2184                                                                       field, field_choice->text);
2185                 } else {
2186                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2187                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2188                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2189                                                                                  field,
2190                                                                                  GPOINTER_TO_INT (l->data));
2191                         }
2192                 }
2193                 field->changed = FALSE;
2194                 ev_view_reload_page (view, field->page->index, field_region);
2195                 gdk_region_destroy (field_region);
2196         }
2197 }
2198
2199 static void
2200 ev_view_form_field_choice_changed (GtkWidget   *widget,
2201                                    EvFormField *field)
2202 {
2203         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2204
2205         if (GTK_IS_COMBO_BOX (widget)) {
2206                 gint item;
2207
2208                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2209                 if (!field_choice->selected_items ||
2210                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2211                         g_list_free (field_choice->selected_items);
2212                         field_choice->selected_items = NULL;
2213                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2214                                                                        GINT_TO_POINTER (item));
2215                         field->changed = TRUE;
2216                 }
2217
2218                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
2219                         gchar *text;
2220
2221                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
2222                         if (!field_choice->text ||
2223                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2224                                 g_free (field_choice->text);
2225                                 field_choice->text = text;
2226                                 field->changed = TRUE;
2227                         }
2228                 }
2229         } else if (GTK_IS_TREE_SELECTION (widget)) {
2230                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2231                 GtkTreeModel     *model;
2232                 GList            *items, *l;
2233
2234                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2235                 g_list_free (field_choice->selected_items);
2236                 field_choice->selected_items = NULL;
2237
2238                 for (l = items; l && l->data; l = g_list_next (l)) {
2239                         GtkTreeIter  iter;
2240                         GtkTreePath *path = (GtkTreePath *)l->data;
2241                         gint         item;
2242
2243                         gtk_tree_model_get_iter (model, &iter, path);
2244                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2245
2246                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2247                                                                        GINT_TO_POINTER (item));
2248
2249                         gtk_tree_path_free (path);
2250                 }
2251
2252                 g_list_free (items);
2253
2254                 field->changed = TRUE;
2255         }
2256 }
2257
2258 static GtkWidget *
2259 ev_view_form_field_choice_create_widget (EvView      *view,
2260                                          EvFormField *field)
2261 {
2262         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2263         GtkWidget         *choice;
2264         GtkTreeModel      *model;
2265         gint               n_items, i;
2266         gint               selected_item = 0;
2267
2268         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2269                                                                    field);
2270         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2271         for (i = 0; i < n_items; i++) {
2272                 GtkTreeIter iter;
2273                 gchar      *item;
2274
2275                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2276                                                                      field, i);
2277                 if (ev_document_forms_form_field_choice_is_item_selected (
2278                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2279                         selected_item = i;
2280                         /* FIXME: we need a get_selected_items function in poppler */
2281                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2282                                                                        GINT_TO_POINTER (i));
2283                 }
2284
2285                 if (item) {
2286                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2287                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2288                                             0, item,
2289                                             1, i,
2290                                             -1);
2291                         g_free (item);
2292                 }
2293         }
2294
2295         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2296                 GtkCellRenderer  *renderer;
2297                 GtkWidget        *tree_view;
2298                 GtkTreeSelection *selection;
2299
2300                 tree_view = gtk_tree_view_new_with_model (model);
2301                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2302
2303                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2304                 if (field_choice->multi_select) {
2305                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2306                 }
2307
2308                 /* TODO: set selected items */
2309
2310                 renderer = gtk_cell_renderer_text_new ();
2311                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2312                                                              0,
2313                                                              "choix", renderer,
2314                                                              "text", 0,
2315                                                              NULL);
2316
2317                 choice = gtk_scrolled_window_new (NULL, NULL);
2318                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2319                                                 GTK_POLICY_AUTOMATIC,
2320                                                 GTK_POLICY_AUTOMATIC);
2321                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2322                 gtk_widget_show (tree_view);
2323
2324                 g_signal_connect (selection, "changed",
2325                                   G_CALLBACK (ev_view_form_field_choice_changed),
2326                                   field);
2327                 g_signal_connect_after (selection, "changed",
2328                                         G_CALLBACK (ev_view_form_field_destroy),
2329                                         view);
2330         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2331                 gchar *text;
2332
2333                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2334                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2335                 if (text) {
2336                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2337                         g_free (text);
2338                 }
2339
2340                 g_signal_connect (choice, "changed",
2341                                   G_CALLBACK (ev_view_form_field_choice_changed),
2342                                   field);
2343                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
2344                                         G_CALLBACK (ev_view_form_field_destroy),
2345                                         view);
2346         } else { /* ComboBoxText */
2347                 GtkCellRenderer *renderer;
2348
2349                 choice = gtk_combo_box_new_with_model (model);
2350                 renderer = gtk_cell_renderer_text_new ();
2351                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2352                                             renderer, TRUE);
2353                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2354                                                 renderer,
2355                                                 "text", 0,
2356                                                 NULL);
2357                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2358                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2359
2360                 g_signal_connect (choice, "changed",
2361                                   G_CALLBACK (ev_view_form_field_choice_changed),
2362                                   field);
2363                 g_signal_connect_after (choice, "changed",
2364                                         G_CALLBACK (ev_view_form_field_destroy),
2365                                         view);
2366         }
2367
2368         g_object_unref (model);
2369
2370         g_object_weak_ref (G_OBJECT (choice),
2371                            (GWeakNotify)ev_view_form_field_choice_save,
2372                            view);
2373
2374         return choice;
2375 }
2376
2377 static void
2378 ev_view_handle_form_field (EvView      *view,
2379                            EvFormField *field,
2380                            gdouble      x,
2381                            gdouble      y)
2382 {
2383         GtkWidget   *field_widget = NULL;
2384         GList       *form_field_mapping;
2385         GdkRectangle view_area;
2386
2387         if (field->is_read_only)
2388                 return;
2389
2390         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2391                 field_widget = ev_view_form_field_button_create_widget (view, field);
2392         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2393                 field_widget = ev_view_form_field_text_create_widget (view, field);
2394         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2395                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2396         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2397                 /* TODO */
2398         }
2399
2400         /* Form field doesn't require a widget */
2401         if (!field_widget)
2402                 return;
2403
2404         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2405                                 g_object_ref (field),
2406                                 (GDestroyNotify)g_object_unref);
2407
2408         form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2409                                                                    field->page->index);
2410         ev_view_get_area_from_mapping (view, field->page->index,
2411                                        form_field_mapping,
2412                                        field, &view_area);
2413
2414         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2415         gtk_widget_show (field_widget);
2416         gtk_widget_grab_focus (field_widget);
2417 }
2418
2419 /* Annotations */
2420 static EvViewWindowChild *
2421 ev_view_get_window_child (EvView    *view,
2422                           GtkWidget *window)
2423 {
2424         GList *children = view->window_children;
2425
2426         while (children) {
2427                 EvViewWindowChild *child;
2428
2429                 child = (EvViewWindowChild *)children->data;
2430                 children = children->next;
2431
2432                 if (child->window == window)
2433                         return child;
2434         }
2435
2436         return NULL;
2437 }
2438
2439 static void
2440 ev_view_window_child_move (EvView            *view,
2441                            EvViewWindowChild *child,
2442                            gint               x,
2443                            gint               y)
2444 {
2445         child->x = x;
2446         child->y = y;
2447         gtk_window_move (GTK_WINDOW (child->window),
2448                          MAX (child->parent_x, x),
2449                          MAX (child->parent_y, y));
2450 }
2451
2452 static void
2453 ev_view_window_child_move_with_parent (EvView    *view,
2454                                        GtkWidget *window)
2455 {
2456         EvViewWindowChild *child;
2457         gint               root_x, root_y;
2458
2459         child = ev_view_get_window_child (view, window);
2460         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2461                                &root_x, &root_y);
2462         if (root_x != child->parent_x || root_y != child->parent_y) {
2463                 gint dest_x, dest_y;
2464
2465                 dest_x = child->x + (root_x - child->parent_x);
2466                 dest_y = child->y + (root_y - child->parent_y);
2467                 child->parent_x = root_x;
2468                 child->parent_y = root_y;
2469                 ev_view_window_child_move (view, child, dest_x, dest_y);
2470         }
2471
2472         if (child->visible && !GTK_WIDGET_VISIBLE (window))
2473                 gtk_widget_show (window);
2474 }
2475
2476 static void
2477 ev_view_window_child_put (EvView    *view,
2478                           GtkWidget *window,
2479                           guint      page,
2480                           gint       x,
2481                           gint       y,
2482                           gdouble    orig_x,
2483                           gdouble    orig_y)
2484 {
2485         EvViewWindowChild *child;
2486         gint               root_x, root_y;
2487
2488         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2489                                &root_x, &root_y);
2490
2491         child = g_new0 (EvViewWindowChild, 1);
2492         child->window = window;
2493         child->page = page;
2494         child->orig_x = orig_x;
2495         child->orig_y = orig_y;
2496         child->parent_x = root_x;
2497         child->parent_y = root_y;
2498         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2499         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2500
2501         if (child->visible)
2502                 gtk_widget_show (window);
2503         else
2504                 gtk_widget_hide (window);
2505
2506         view->window_children = g_list_append (view->window_children, child);
2507 }
2508
2509 static EvViewWindowChild *
2510 ev_view_find_window_child_for_annot (EvView       *view,
2511                                      guint         page,
2512                                      EvAnnotation *annot)
2513 {
2514         GList *children = view->window_children;
2515
2516         while (children) {
2517                 EvViewWindowChild *child;
2518                 EvAnnotation      *wannot;
2519
2520                 child = (EvViewWindowChild *)children->data;
2521                 children = children->next;
2522
2523                 if (child->page != page)
2524                         continue;
2525
2526                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2527                 if (wannot == annot || strcmp (wannot->name, annot->name) == 0)
2528                         return child;
2529         }
2530
2531         return NULL;
2532 }
2533
2534 static void
2535 ev_view_window_children_free (EvView *view)
2536 {
2537         GList *l;
2538
2539         if (!view->window_children)
2540                 return;
2541
2542         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2543                 EvViewWindowChild *child;
2544
2545                 child = (EvViewWindowChild *)l->data;
2546                 gtk_widget_destroy (GTK_WIDGET (child->window));
2547                 g_free (child);
2548         }
2549         g_list_free (view->window_children);
2550         view->window_children = NULL;
2551         view->window_child_focus = NULL;
2552 }
2553
2554 static void
2555 annotation_window_grab_focus (GtkWidget *widget,
2556                               EvView    *view)
2557 {
2558         if (view->window_child_focus)
2559                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2560         view->window_child_focus = ev_view_get_window_child (view, widget);
2561 }
2562
2563 static void
2564 annotation_window_closed (EvAnnotationWindow *window,
2565                           EvView             *view)
2566 {
2567         EvViewWindowChild *child;
2568
2569         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2570         child->visible = FALSE;
2571 }
2572
2573 static void
2574 annotation_window_moved (EvAnnotationWindow *window,
2575                          gint                x,
2576                          gint                y,
2577                          EvView             *view)
2578 {
2579         EvViewWindowChild *child;
2580         GdkRectangle       page_area;
2581         GtkBorder          border;
2582         GdkRectangle       view_rect;
2583         EvRectangle        doc_rect;
2584         gint               width, height;
2585
2586         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2587         if (child->x == x && child->y == y)
2588                 return;
2589
2590         child->moved = TRUE;
2591         child->x = x;
2592         child->y = y;
2593
2594         /* Window has been moved by the user,
2595          * we have to set a new origin in doc coords
2596          */
2597         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2598         view_rect.x = (x - child->parent_x) + view->scroll_x;
2599         view_rect.y = (y - child->parent_y) + view->scroll_y;
2600         view_rect.width = width;
2601         view_rect.height = height;
2602
2603         get_page_extents (view, child->page, &page_area, &border);
2604         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2605         child->orig_x = doc_rect.x1;
2606         child->orig_y = doc_rect.y1;
2607 }
2608
2609 static void
2610 ev_view_annotation_save (EvView       *view,
2611                          EvAnnotation *annot)
2612 {
2613         if (!view->document)
2614                 return;
2615
2616         if (!annot->changed)
2617                 return;
2618
2619         ev_document_annotations_annotation_set_contents (EV_DOCUMENT_ANNOTATIONS (view->document),
2620                                                          annot, annot->contents);
2621         annot->changed = FALSE;
2622 }
2623
2624 static void
2625 show_annotation_windows (EvView *view,
2626                          gint    page)
2627 {
2628         GList     *annots, *l;
2629         GtkWindow *parent;
2630
2631         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2632
2633         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2634
2635         for (l = annots; l && l->data; l = g_list_next (l)) {
2636                 EvAnnotation      *annot;
2637                 EvViewWindowChild *child;
2638                 GtkWidget         *window;
2639                 EvRectangle       *doc_rect;
2640                 GdkRectangle       view_rect;
2641
2642                 annot = ((EvMapping *)(l->data))->data;
2643
2644                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2645                         continue;
2646
2647                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2648                         continue;
2649
2650                 window = g_object_get_data (G_OBJECT (annot), "popup");
2651                 if (window) {
2652                         ev_view_window_child_move_with_parent (view, window);
2653                         continue;
2654                 }
2655
2656                 /* Look if we already have a popup for this annot */
2657                 child = ev_view_find_window_child_for_annot (view, page, annot);
2658                 window = child ? child->window : NULL;
2659                 if (window) {
2660                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2661                         g_object_set_data (G_OBJECT (annot), "popup", window);
2662                         ev_view_window_child_move_with_parent (view, window);
2663                 } else {
2664                         window = ev_annotation_window_new (annot, parent);
2665                         g_signal_connect (window, "grab_focus",
2666                                           G_CALLBACK (annotation_window_grab_focus),
2667                                           view);
2668                         g_signal_connect (window, "closed",
2669                                           G_CALLBACK (annotation_window_closed),
2670                                           view);
2671                         g_signal_connect (window, "moved",
2672                                           G_CALLBACK (annotation_window_moved),
2673                                           view);
2674                         g_object_set_data (G_OBJECT (annot), "popup", window);
2675
2676                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2677                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2678                         view_rect.x -= view->scroll_x;
2679                         view_rect.y -= view->scroll_y;
2680
2681                         ev_view_window_child_put (view, window, page,
2682                                                   view_rect.x, view_rect.y,
2683                                                   doc_rect->x1, doc_rect->y1);
2684
2685                         g_object_weak_ref (G_OBJECT (annot),
2686                                            (GWeakNotify)ev_view_annotation_save,
2687                                            view);
2688                 }
2689         }
2690 }
2691
2692 static void
2693 hide_annotation_windows (EvView *view,
2694                          gint    page)
2695 {
2696         GList *annots, *l;
2697
2698         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2699
2700         for (l = annots; l && l->data; l = g_list_next (l)) {
2701                 EvAnnotation *annot;
2702                 GtkWidget    *window;
2703
2704                 annot = ((EvMapping *)(l->data))->data;
2705
2706                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2707                         continue;
2708
2709                 window = g_object_get_data (G_OBJECT (annot), "popup");
2710                 if (window)
2711                         gtk_widget_hide (window);
2712         }
2713 }
2714
2715 static EvAnnotation *
2716 ev_view_get_annotation_at_location (EvView  *view,
2717                                     gdouble  x,
2718                                     gdouble  y)
2719 {
2720         gint page = -1;
2721         gint x_new = 0, y_new = 0;
2722         GList *annotations_mapping;
2723
2724         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2725                 return NULL;
2726
2727         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2728                 return NULL;
2729
2730         annotations_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
2731
2732         if (annotations_mapping)
2733                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2734         else
2735                 return NULL;
2736 }
2737
2738 static void
2739 ev_view_handle_annotation (EvView       *view,
2740                            EvAnnotation *annot,
2741                            gdouble       x,
2742                            gdouble       y,
2743                            guint32       timestamp)
2744 {
2745         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2746                 GtkWidget *window;
2747
2748                 window = g_object_get_data (G_OBJECT (annot), "popup");
2749                 if (window) {
2750                         EvViewWindowChild *child;
2751
2752                         child = ev_view_get_window_child (view, window);
2753                         if (!child->visible) {
2754                                 child->visible = TRUE;
2755                                 ev_view_window_child_move (view, child, child->x, child->y);
2756                                 gtk_widget_show (window);
2757                         }
2758                 }
2759         }
2760
2761         if (EV_IS_ANNOTATION_ATTACHMENT (annot)) {
2762                 EvAttachment *attachment = EV_ANNOTATION_ATTACHMENT (annot)->attachment;
2763
2764                 if (attachment) {
2765                         GError *error = NULL;
2766
2767                         ev_attachment_open (attachment,
2768                                             gtk_widget_get_screen (GTK_WIDGET (view)),
2769                                             timestamp,
2770                                             &error);
2771
2772                         if (error) {
2773                                 g_warning ("%s", error->message);
2774                                 g_error_free (error);
2775                         }
2776                 }
2777         }
2778 }
2779
2780 /*** GtkWidget implementation ***/
2781
2782 static void
2783 ev_view_size_request_continuous_dual_page (EvView         *view,
2784                                            GtkRequisition *requisition)
2785 {
2786         gint n_pages;
2787
2788         n_pages = ev_document_get_n_pages (view->document) + 1;
2789         get_page_y_offset (view, n_pages, &requisition->height);
2790
2791         switch (view->sizing_mode) {
2792                 case EV_SIZING_FIT_WIDTH:
2793                 case EV_SIZING_BEST_FIT:
2794                         requisition->width = 1;
2795
2796                         break;
2797                 case EV_SIZING_FREE: {
2798                         gint max_width;
2799                         GtkBorder border;
2800
2801                         ev_view_get_max_page_size (view, &max_width, NULL);
2802                         compute_border (view, max_width, max_width, &border);
2803                         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2804                 }
2805                         break;
2806                 default:
2807                         g_assert_not_reached ();
2808         }
2809 }
2810
2811 static void
2812 ev_view_size_request_continuous (EvView         *view,
2813                                  GtkRequisition *requisition)
2814 {
2815         gint n_pages;
2816
2817         n_pages = ev_document_get_n_pages (view->document);
2818         get_page_y_offset (view, n_pages, &requisition->height);
2819
2820         switch (view->sizing_mode) {
2821                 case EV_SIZING_FIT_WIDTH:
2822                 case EV_SIZING_BEST_FIT:
2823                         requisition->width = 1;
2824
2825                         break;
2826                 case EV_SIZING_FREE: {
2827                         gint max_width;
2828                         GtkBorder border;
2829
2830                         ev_view_get_max_page_size (view, &max_width, NULL);
2831                         compute_border (view, max_width, max_width, &border);
2832                         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2833                 }
2834                         break;
2835                 default:
2836                         g_assert_not_reached ();
2837         }
2838 }
2839
2840 static void
2841 ev_view_size_request_dual_page (EvView         *view,
2842                                 GtkRequisition *requisition)
2843 {
2844         GtkBorder border;
2845         gint width, height;
2846
2847         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2848                 requisition->width = 1;
2849                 requisition->height = 1;
2850
2851                 return;
2852         }
2853
2854         /* Find the largest of the two. */
2855         ev_view_get_page_size (view,
2856                                view->current_page,
2857                                &width, &height);
2858         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
2859                 gint width_2, height_2;
2860                 ev_view_get_page_size (view,
2861                                        view->current_page + 1,
2862                                        &width_2, &height_2);
2863                 if (width_2 > width) {
2864                         width = width_2;
2865                         height = height_2;
2866                 }
2867         }
2868         compute_border (view, width, height, &border);
2869
2870         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
2871                 ((width + border.left + border.right) * 2) + (view->spacing * 3);
2872         requisition->height = (height + border.top + border.bottom) + (view->spacing * 2);
2873 }
2874
2875 static void
2876 ev_view_size_request_single_page (EvView         *view,
2877                                   GtkRequisition *requisition)
2878 {
2879         GtkBorder border;
2880         gint width, height;
2881
2882         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2883                 requisition->width = 1;
2884                 requisition->height = 1;
2885
2886                 return;
2887         }
2888
2889         ev_view_get_page_size (view, view->current_page, &width, &height);
2890         compute_border (view, width, height, &border);
2891
2892         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
2893                 width + border.left + border.right + (2 * view->spacing);
2894         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2895 }
2896
2897 static void
2898 ev_view_size_request (GtkWidget      *widget,
2899                       GtkRequisition *requisition)
2900 {
2901         EvView *view = EV_VIEW (widget);
2902
2903         if (view->document == NULL) {
2904                 requisition->width = 1;
2905                 requisition->height = 1;
2906                 return;
2907         }
2908
2909         if (view->presentation) {
2910                 requisition->width = 1;
2911                 requisition->height = 1;
2912                 return;
2913         }
2914
2915         if (view->continuous && view->dual_page)
2916                 ev_view_size_request_continuous_dual_page (view, requisition);
2917         else if (view->continuous)
2918                 ev_view_size_request_continuous (view, requisition);
2919         else if (view->dual_page)
2920                 ev_view_size_request_dual_page (view, requisition);
2921         else
2922                 ev_view_size_request_single_page (view, requisition);
2923 }
2924
2925 static void
2926 ev_view_size_allocate (GtkWidget      *widget,
2927                        GtkAllocation  *allocation)
2928 {
2929         EvView *view = EV_VIEW (widget);
2930         GList  *children, *l;
2931         gint    root_x, root_y;
2932
2933         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2934
2935         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2936             view->sizing_mode == EV_SIZING_BEST_FIT) {
2937                 ev_view_zoom_for_size (view,
2938                                        allocation->width,
2939                                        allocation->height);
2940                 ev_view_size_request (widget, &widget->requisition);
2941         }
2942
2943         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2944         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2945
2946         if (view->document)
2947                 view_update_range_and_current_page (view);
2948
2949         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2950         view->pending_resize = FALSE;
2951         view->pending_point.x = 0;
2952         view->pending_point.y = 0;
2953
2954         children = gtk_container_get_children (GTK_CONTAINER (widget));
2955         for (l = children; l && l->data; l = g_list_next (l)) {
2956                 EvFormField   *field;
2957                 GdkRectangle   view_area;
2958                 GList         *form_field_mapping;
2959                 GtkAllocation  child_allocation;
2960                 GtkRequisition child_requisition;
2961                 GtkWidget     *child = (GtkWidget *)l->data;
2962
2963                 field = g_object_get_data (G_OBJECT (child), "form-field");
2964                 if (!field)
2965                         continue;
2966
2967                 form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2968                                                                            field->page->index);
2969                 ev_view_get_area_from_mapping (view, field->page->index,
2970                                                form_field_mapping,
2971                                                field, &view_area);
2972
2973                 gtk_widget_size_request (child, &child_requisition);
2974                 if (child_requisition.width != view_area.width ||
2975                     child_requisition.height != view_area.height)
2976                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2977
2978                 gtk_container_child_get (GTK_CONTAINER (widget),
2979                                          child,
2980                                          "x", &child_allocation.x,
2981                                          "y", &child_allocation.y,
2982                                          NULL);
2983                 if (child_allocation.x != view_area.x ||
2984                     child_allocation.y != view_area.y) {
2985                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2986                 }
2987         }
2988         g_list_free (children);
2989
2990         if (view->window_children)
2991                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2992                                        &root_x, &root_y);
2993
2994         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2995                 EvViewWindowChild *child;
2996                 EvRectangle        doc_rect;
2997                 GdkRectangle       view_rect;
2998
2999                 child = (EvViewWindowChild *)l->data;
3000
3001                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
3002                 if (child->moved) {
3003                         doc_rect.x1 = child->orig_x;
3004                         doc_rect.y1 = child->orig_y;
3005                 }
3006                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
3007                 view_rect.x -= view->scroll_x;
3008                 view_rect.y -= view->scroll_y;
3009
3010                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
3011                         child->parent_x = root_x;
3012                         child->parent_y = root_y;
3013                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
3014                 }
3015         }
3016 }
3017
3018 static void
3019 ev_view_realize (GtkWidget *widget)
3020 {
3021         EvView *view = EV_VIEW (widget);
3022
3023         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
3024                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
3025
3026         gdk_window_set_events (view->layout.bin_window,
3027                                (gdk_window_get_events (view->layout.bin_window) |
3028                                 GDK_EXPOSURE_MASK |
3029                                 GDK_BUTTON_PRESS_MASK |
3030                                 GDK_BUTTON_RELEASE_MASK |
3031                                 GDK_SCROLL_MASK |
3032                                 GDK_KEY_PRESS_MASK |
3033                                 GDK_POINTER_MOTION_MASK |
3034                                 GDK_POINTER_MOTION_HINT_MASK |
3035                                 GDK_ENTER_NOTIFY_MASK |
3036                                 GDK_LEAVE_NOTIFY_MASK));
3037
3038         if (view->presentation)
3039                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
3040         else
3041                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
3042
3043         on_adjustment_value_changed (NULL, view);
3044 }
3045
3046 static gboolean
3047 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
3048 {
3049         EvView *view = EV_VIEW (widget);
3050         guint state;
3051
3052         state = event->state & gtk_accelerator_get_default_mod_mask ();
3053
3054         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
3055                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
3056                 if (event->direction == GDK_SCROLL_UP ||
3057                     event->direction == GDK_SCROLL_LEFT) {
3058                         if (ev_view_can_zoom_in (view)) {
3059                                 ev_view_zoom_in (view);
3060                         }
3061                 } else {
3062                         if (ev_view_can_zoom_out (view)) {
3063                                 ev_view_zoom_out (view);
3064                         }
3065                 }
3066
3067                 return TRUE;
3068         }
3069
3070         view->jump_to_find_result = FALSE;
3071
3072         /* Shift+Wheel scrolls the in the perpendicular direction */
3073         if (state & GDK_SHIFT_MASK) {
3074                 if (event->direction == GDK_SCROLL_UP)
3075                         event->direction = GDK_SCROLL_LEFT;
3076                 else if (event->direction == GDK_SCROLL_LEFT)
3077                         event->direction = GDK_SCROLL_UP;
3078                 else if (event->direction == GDK_SCROLL_DOWN)
3079                         event->direction = GDK_SCROLL_RIGHT;
3080                 else if (event->direction == GDK_SCROLL_RIGHT)
3081                         event->direction = GDK_SCROLL_DOWN;
3082
3083                 event->state &= ~GDK_SHIFT_MASK;
3084                 state &= ~GDK_SHIFT_MASK;
3085         }
3086
3087         if (state == 0 &&
3088             (view->presentation ||
3089              (view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous))) {
3090                 switch (event->direction) {
3091                         case GDK_SCROLL_DOWN:
3092                         case GDK_SCROLL_RIGHT:
3093                                 ev_view_next_page (view);
3094                                 break;
3095                         case GDK_SCROLL_UP:
3096                         case GDK_SCROLL_LEFT:
3097                                 ev_view_previous_page (view);
3098                                 break;
3099                 }
3100
3101                 return TRUE;
3102         }
3103
3104         return FALSE;
3105 }
3106
3107 static EvViewSelection *
3108 find_selection_for_page (EvView *view,
3109                          gint    page)
3110 {
3111         GList *list;
3112
3113         for (list = view->selection_info.selections; list != NULL; list = list->next) {
3114                 EvViewSelection *selection;
3115
3116                 selection = (EvViewSelection *) list->data;
3117
3118                 if (selection->page == page)
3119                         return selection;
3120         }
3121
3122         return NULL;
3123 }
3124
3125 static void
3126 draw_end_presentation_page (EvView       *view,
3127                             GdkRectangle *page_area)
3128 {
3129         PangoLayout *layout;
3130         PangoFontDescription *font_desc;
3131         gchar *markup;
3132         const gchar *text = _("End of presentation. Press Escape to exit.");
3133
3134         if (view->presentation_state != EV_PRESENTATION_END)
3135                 return;
3136
3137         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
3138         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
3139         pango_layout_set_markup (layout, markup, -1);
3140         g_free (markup);
3141
3142         font_desc = pango_font_description_new ();
3143         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
3144         pango_layout_set_font_description (layout, font_desc);
3145
3146         gtk_paint_layout (GTK_WIDGET (view)->style,
3147                           view->layout.bin_window,
3148                           GTK_WIDGET_STATE (view),
3149                           FALSE,
3150                           page_area,
3151                           GTK_WIDGET (view),
3152                           NULL,
3153                           page_area->x + 15,
3154                           page_area->y + 15,
3155                           layout);
3156
3157         pango_font_description_free (font_desc);
3158         g_object_unref (layout);
3159 }
3160
3161 static gboolean
3162 ev_view_expose_event (GtkWidget      *widget,
3163                       GdkEventExpose *event)
3164 {
3165         EvView  *view = EV_VIEW (widget);
3166         cairo_t *cr;
3167         gint     i;
3168
3169         if (view->animation) {
3170                 if (ev_transition_animation_ready (view->animation)) {
3171                         GdkRectangle page_area;
3172                         GtkBorder    border;
3173
3174                         if (get_page_extents (view, view->current_page, &page_area, &border)) {
3175                                 cr = gdk_cairo_create (view->layout.bin_window);
3176
3177                                 /* normalize to x=0, y=0 */
3178                                 cairo_translate (cr, page_area.x, page_area.y);
3179                                 page_area.x = page_area.y = 0;
3180
3181                                 ev_transition_animation_paint (view->animation, cr, page_area);
3182                                 cairo_destroy (cr);
3183                         }
3184                 }
3185
3186                 return TRUE;
3187         }
3188
3189         if (view->presentation) {
3190                 switch (view->presentation_state) {
3191                         case EV_PRESENTATION_END: {
3192                                 GdkRectangle area = {0};
3193
3194                                 area.width = widget->allocation.width;
3195                                 area.height = widget->allocation.height;
3196
3197                                 draw_end_presentation_page (view, &area);
3198                         }
3199                                 return FALSE;
3200                         case EV_PRESENTATION_BLACK:
3201                         case EV_PRESENTATION_WHITE:
3202                                 return FALSE;
3203                         case EV_PRESENTATION_NORMAL:
3204                         default:
3205                                 break;
3206                 }
3207         } else if (view->loading) {
3208                 GdkRectangle area = {0};
3209
3210                 area.width = widget->allocation.width;
3211                 area.height = widget->allocation.height;
3212
3213                 draw_loading_text (view,
3214                                    &area,
3215                                    &(event->area));
3216         }
3217
3218         if (view->document == NULL)
3219                 return FALSE;
3220
3221         cr = gdk_cairo_create (view->layout.bin_window);
3222
3223         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3224                 GdkRectangle page_area;
3225                 GtkBorder border;
3226                 gboolean page_ready = TRUE;
3227
3228                 if (!get_page_extents (view, i, &page_area, &border))
3229                         continue;
3230
3231                 page_area.x -= view->scroll_x;
3232                 page_area.y -= view->scroll_y;
3233
3234                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
3235
3236                 if (page_ready && view->find_pages && view->highlight_find_results)
3237                         highlight_find_results (view, i);
3238                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3239                         show_annotation_windows (view, i);
3240         }
3241
3242         cairo_destroy (cr);
3243
3244         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3245                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3246
3247         return FALSE;
3248 }
3249
3250 static gboolean
3251 ev_view_do_popup_menu (EvView *view,
3252                        gdouble x,
3253                        gdouble y)
3254 {
3255         EvLink       *link;
3256         EvImage      *image;
3257         EvAnnotation *annot;
3258
3259         image = ev_view_get_image_at_location (view, x, y);
3260         if (image) {
3261                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
3262                 return TRUE;
3263         }
3264
3265         link = ev_view_get_link_at_location (view, x, y);
3266         if (link) {
3267                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
3268                 return TRUE;
3269         }
3270
3271         annot = ev_view_get_annotation_at_location (view, x, y);
3272         if (annot) {
3273                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, annot);
3274                 return TRUE;
3275         }
3276
3277         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
3278
3279         return TRUE;
3280 }
3281
3282 static gboolean
3283 ev_view_popup_menu (GtkWidget *widget)
3284 {
3285         gint x, y;
3286
3287         gtk_widget_get_pointer (widget, &x, &y);
3288         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3289 }
3290
3291 static void
3292 get_link_area (EvView       *view,
3293                gint          x,
3294                gint          y,
3295                EvLink       *link,
3296                GdkRectangle *area)
3297 {
3298         GList *link_mapping;
3299         gint   page;
3300         gint   x_offset = 0, y_offset = 0;
3301
3302         x += view->scroll_x;
3303         y += view->scroll_y;
3304
3305         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3306
3307         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
3308         ev_view_get_area_from_mapping (view, page,
3309                                        link_mapping,
3310                                        link, area);
3311 }
3312
3313 static void
3314 get_annot_area (EvView       *view,
3315                gint          x,
3316                gint          y,
3317                EvAnnotation *annot,
3318                GdkRectangle *area)
3319 {
3320         GList *annot_mapping;
3321         gint   page;
3322         gint   x_offset = 0, y_offset = 0;
3323
3324         x += view->scroll_x;
3325         y += view->scroll_y;
3326
3327         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3328
3329         annot_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
3330         ev_view_get_area_from_mapping (view, page,
3331                                        annot_mapping,
3332                                        annot, area);
3333 }
3334
3335 static gboolean
3336 ev_view_query_tooltip (GtkWidget  *widget,
3337                        gint        x,
3338                        gint        y,
3339                        gboolean    keyboard_tip,
3340                        GtkTooltip *tooltip)
3341 {
3342         EvView       *view = EV_VIEW (widget);
3343         EvLink       *link;
3344         EvAnnotation *annot;
3345         gchar        *text;
3346
3347         annot = ev_view_get_annotation_at_location (view, x, y);
3348         if (annot && annot->contents) {
3349                 GdkRectangle annot_area;
3350
3351                 get_annot_area (view, x, y, annot, &annot_area);
3352                 gtk_tooltip_set_text (tooltip, annot->contents);
3353                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
3354
3355                 return TRUE;
3356         }
3357
3358         link = ev_view_get_link_at_location (view, x, y);
3359         if (!link)
3360                 return FALSE;
3361
3362         text = tip_from_link (view, link);
3363         if (text && g_utf8_validate (text, -1, NULL)) {
3364                 GdkRectangle link_area;
3365
3366                 get_link_area (view, x, y, link, &link_area);
3367                 gtk_tooltip_set_text (tooltip, text);
3368                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3369         }
3370         g_free (text);
3371
3372         return TRUE;
3373 }
3374
3375 static void
3376 start_selection_for_event (EvView         *view,
3377                            GdkEventButton *event)
3378 {
3379         clear_selection (view);
3380
3381         view->selection_info.start.x = event->x + view->scroll_x;
3382         view->selection_info.start.y = event->y + view->scroll_y;
3383
3384         switch (event->type) {
3385                 case GDK_2BUTTON_PRESS:
3386                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3387                         break;
3388                 case GDK_3BUTTON_PRESS:
3389                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3390                         break;
3391                 default:
3392                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3393                         return;
3394         }
3395
3396         /* In case of WORD or LINE, compute selections now */
3397         compute_selections (view,
3398                             view->selection_info.style,
3399                             &(view->selection_info.start),
3400                             &(view->selection_info.start));
3401 }
3402
3403 static gboolean
3404 ev_view_button_press_event (GtkWidget      *widget,
3405                             GdkEventButton *event)
3406 {
3407         EvView *view = EV_VIEW (widget);
3408
3409         if (!view->document)
3410                 return FALSE;
3411
3412         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3413                 gtk_widget_grab_focus (widget);
3414         }
3415
3416         if (view->window_child_focus) {
3417                 EvAnnotationWindow *window;
3418                 EvAnnotation       *annot;
3419
3420                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3421                 annot = ev_annotation_window_get_annotation (window);
3422                 ev_annotation_window_ungrab_focus (window);
3423                 ev_view_annotation_save (view, annot);
3424                 view->window_child_focus = NULL;
3425         }
3426
3427         view->pressed_button = event->button;
3428         view->selection_info.in_drag = FALSE;
3429
3430         if (view->scroll_info.autoscrolling)
3431                 return TRUE;
3432
3433         switch (event->button) {
3434                 case 1: {
3435                         EvImage *image;
3436                         EvAnnotation *annot;
3437                         EvFormField *field;
3438
3439                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3440                                 if (event->type == GDK_3BUTTON_PRESS) {
3441                                         start_selection_for_event (view, event);
3442                                 } else if (location_in_selected_text (view,
3443                                                                event->x + view->scroll_x,
3444                                                                event->y + view->scroll_y)) {
3445                                         view->selection_info.in_drag = TRUE;
3446                                 } else {
3447                                         start_selection_for_event (view, event);
3448                                 }
3449
3450                                 gtk_widget_queue_draw (widget);
3451                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3452                                 ev_view_handle_annotation (view, annot, event->x, event->y, event->time);
3453                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3454                                 ev_view_remove_all (view);
3455                                 ev_view_handle_form_field (view, field, event->x, event->y);
3456                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3457                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3458                                 if (view->image_dnd_info.image)
3459                                         g_object_unref (view->image_dnd_info.image);
3460                                 view->image_dnd_info.image = g_object_ref (image);
3461                                 view->image_dnd_info.in_drag = TRUE;
3462
3463                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3464                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3465                         } else {
3466                                 ev_view_remove_all (view);
3467
3468                                 if (EV_IS_SELECTION (view->document))
3469                                         start_selection_for_event (view, event);
3470                         }
3471                 }
3472                         return TRUE;
3473                 case 2:
3474                         /* use root coordinates as reference point because
3475                          * scrolling changes window relative coordinates */
3476                         view->drag_info.start.x = event->x_root;
3477                         view->drag_info.start.y = event->y_root;
3478                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3479                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3480
3481                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3482
3483                         return TRUE;
3484                 case 3:
3485                         view->scroll_info.start_y = event->y;
3486                         return ev_view_do_popup_menu (view, event->x, event->y);
3487         }
3488
3489         return FALSE;
3490 }
3491
3492 static void
3493 ev_view_remove_all (EvView *view)
3494 {
3495         GList *children, *child;
3496
3497         children = gtk_container_get_children (GTK_CONTAINER (view));
3498         for (child = children; child && child->data; child = g_list_next (child)) {
3499                 gtk_container_remove (GTK_CONTAINER (view),
3500                                       GTK_WIDGET (child->data));
3501         }
3502         g_list_free (children);
3503 }
3504
3505 /*** Drag and Drop ***/
3506 static void
3507 ev_view_drag_data_get (GtkWidget        *widget,
3508                        GdkDragContext   *context,
3509                        GtkSelectionData *selection_data,
3510                        guint             info,
3511                        guint             time)
3512 {
3513         EvView *view = EV_VIEW (widget);
3514
3515         switch (info) {
3516                 case TARGET_DND_TEXT:
3517                         if (EV_IS_SELECTION (view->document) &&
3518                             view->selection_info.selections) {
3519                                 gchar *text;
3520
3521                                 text = get_selected_text (view);
3522                                 gtk_selection_data_set_text (selection_data,
3523                                                              text,
3524                                                              strlen (text));
3525                                 g_free (text);
3526                         }
3527                         break;
3528                 case TARGET_DND_IMAGE:
3529                         if (view->image_dnd_info.image) {
3530                                 GdkPixbuf *pixbuf;
3531
3532                                 ev_document_doc_mutex_lock ();
3533                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3534                                                                        view->image_dnd_info.image);
3535                                 ev_document_doc_mutex_unlock ();
3536
3537                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3538                                 g_object_unref (pixbuf);
3539                         }
3540                         break;
3541                 case TARGET_DND_URI:
3542                         if (view->image_dnd_info.image) {
3543                                 GdkPixbuf   *pixbuf;
3544                                 const gchar *tmp_uri;
3545                                 gchar       *uris[2];
3546
3547                                 ev_document_doc_mutex_lock ();
3548                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3549                                                                        view->image_dnd_info.image);
3550                                 ev_document_doc_mutex_unlock ();
3551
3552                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3553                                 g_object_unref (pixbuf);
3554
3555                                 uris[0] = (gchar *)tmp_uri;
3556                                 uris[1] = NULL;
3557                                 gtk_selection_data_set_uris (selection_data, uris);
3558                         }
3559         }
3560 }
3561
3562 static gboolean
3563 ev_view_drag_motion (GtkWidget      *widget,
3564                      GdkDragContext *context,
3565                      gint            x,
3566                      gint            y,
3567                      guint           time)
3568 {
3569         if (gtk_drag_get_source_widget (context) == widget)
3570                 gdk_drag_status (context, 0, time);
3571         else
3572                 gdk_drag_status (context, context->suggested_action, time);
3573
3574         return TRUE;
3575 }
3576
3577 static gboolean
3578 selection_update_idle_cb (EvView *view)
3579 {
3580         compute_selections (view,
3581                             view->selection_info.style,
3582                             &view->selection_info.start,
3583                             &view->motion);
3584         view->selection_update_id = 0;
3585         return FALSE;
3586 }
3587
3588 static gboolean
3589 selection_scroll_timeout_cb (EvView *view)
3590 {
3591         gint x, y, shift = 0;
3592         GtkWidget *widget = GTK_WIDGET (view);
3593
3594         gtk_widget_get_pointer (widget, &x, &y);
3595
3596         if (y > widget->allocation.height) {
3597                 shift = (y - widget->allocation.height) / 2;
3598         } else if (y < 0) {
3599                 shift = y / 2;
3600         }
3601
3602         if (shift)
3603                 gtk_adjustment_set_value (view->vadjustment,
3604                                           CLAMP (view->vadjustment->value + shift,
3605                                           view->vadjustment->lower,
3606                                           view->vadjustment->upper -
3607                                           view->vadjustment->page_size));
3608
3609         if (x > widget->allocation.width) {
3610                 shift = (x - widget->allocation.width) / 2;
3611         } else if (x < 0) {
3612                 shift = x / 2;
3613         }
3614
3615         if (shift)
3616                 gtk_adjustment_set_value (view->hadjustment,
3617                                           CLAMP (view->hadjustment->value + shift,
3618                                           view->hadjustment->lower,
3619                                           view->hadjustment->upper -
3620                                           view->hadjustment->page_size));
3621
3622         return TRUE;
3623 }
3624
3625 static gboolean
3626 ev_view_drag_update_momentum (EvView *view)
3627 {
3628         int i;
3629         if (!view->drag_info.in_drag)
3630                 return FALSE;
3631
3632         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3633                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3634                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3635         }
3636
3637         /* Momentum is a moving average of 10ms granularity over
3638          * the last 100ms with each 10ms stored in buffer.
3639          */
3640
3641         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3642         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3643
3644         return TRUE;
3645 }
3646
3647 static gboolean
3648 ev_view_scroll_drag_release (EvView *view)
3649 {
3650         gdouble dhadj_value, dvadj_value;
3651         gdouble oldhadjustment, oldvadjustment;
3652
3653         view->drag_info.momentum.x /= 1.2;
3654         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3655
3656         dhadj_value = view->hadjustment->page_size *
3657                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
3658         dvadj_value = view->vadjustment->page_size *
3659                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
3660
3661         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3662         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3663
3664      /* When we reach the edges, we need either to absorb some momentum and bounce by
3665       * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3666      if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
3667            ((oldhadjustment + dhadj_value) < 0))
3668                 view->drag_info.momentum.x = 0;
3669         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
3670            ((oldvadjustment + dvadj_value) < 0))
3671                 view->drag_info.momentum.y = 0;
3672
3673         gtk_adjustment_set_value (view->hadjustment,
3674                                 MIN (oldhadjustment + dhadj_value,
3675                                 view->hadjustment->upper - view->hadjustment->page_size));
3676         gtk_adjustment_set_value (view->vadjustment,
3677                                 MIN (oldvadjustment + dvadj_value,
3678                                 view->vadjustment->upper - view->vadjustment->page_size));
3679
3680         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3681            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3682                 return FALSE;
3683         else
3684                 return TRUE;
3685 }
3686
3687 static gboolean
3688 ev_view_motion_notify_event (GtkWidget      *widget,
3689                              GdkEventMotion *event)
3690 {
3691         EvView *view = EV_VIEW (widget);
3692         gint x, y;
3693
3694         if (!view->document)
3695                 return FALSE;
3696
3697
3698         if (event->is_hint || event->window != view->layout.bin_window) {
3699             gtk_widget_get_pointer (widget, &x, &y);
3700         } else {
3701             x = event->x;
3702             y = event->y;
3703         }
3704
3705         if (view->scroll_info.autoscrolling) {
3706                 view->scroll_info.last_y = y;
3707                 return TRUE;
3708         }
3709
3710         if (view->selection_info.in_drag) {
3711                 if (gtk_drag_check_threshold (widget,
3712                                               view->selection_info.start.x,
3713                                               view->selection_info.start.y,
3714                                               x, y)) {
3715                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3716
3717                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3718
3719                         gtk_drag_begin (widget, target_list,
3720                                         GDK_ACTION_COPY,
3721                                         1, (GdkEvent *)event);
3722
3723                         view->selection_info.in_drag = FALSE;
3724
3725                         gtk_target_list_unref (target_list);
3726
3727                         return TRUE;
3728                 }
3729         } else if (view->image_dnd_info.in_drag) {
3730                 if (gtk_drag_check_threshold (widget,
3731                                               view->selection_info.start.x,
3732                                               view->selection_info.start.y,
3733                                               x, y)) {
3734                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3735
3736                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3737                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3738
3739                         gtk_drag_begin (widget, target_list,
3740                                         GDK_ACTION_COPY,
3741                                         1, (GdkEvent *)event);
3742
3743                         view->image_dnd_info.in_drag = FALSE;
3744
3745                         gtk_target_list_unref (target_list);
3746
3747                         return TRUE;
3748                 }
3749         }
3750
3751         switch (view->pressed_button) {
3752         case 1:
3753                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3754                  * documents only.
3755                  */
3756                 if (view->rotation != 0)
3757                         return FALSE;
3758
3759                 /* Schedule timeout to scroll during selection and additionally
3760                  * scroll once to allow arbitrary speed. */
3761                 if (!view->selection_scroll_id)
3762                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3763                                                                (GSourceFunc)selection_scroll_timeout_cb,
3764                                                                view);
3765                 else
3766                     selection_scroll_timeout_cb (view);
3767
3768                 view->selection_info.in_selection = TRUE;
3769                 view->motion.x = x + view->scroll_x;
3770                 view->motion.y = y + view->scroll_y;
3771
3772                 /* Queue an idle to handle the motion.  We do this because
3773                  * handling any selection events in the motion could be slower
3774                  * than new motion events reach us.  We always put it in the
3775                  * idle to make sure we catch up and don't visibly lag the
3776                  * mouse. */
3777                 if (!view->selection_update_id)
3778                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3779
3780                 return TRUE;
3781         case 2:
3782                 if (!view->drag_info.in_drag) {
3783                         gboolean start;
3784                         int i;
3785
3786                         start = gtk_drag_check_threshold (widget,
3787                                                           view->drag_info.start.x,
3788                                                           view->drag_info.start.y,
3789                                                           event->x_root,
3790                                                           event->y_root);
3791                         view->drag_info.in_drag = start;
3792                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3793                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3794                         /* Set 100 to choose how long it takes to build up momentum */
3795                         /* Clear out previous momentum info: */
3796                         for (i = 0; i < DRAG_HISTORY; i++) {
3797                                 view->drag_info.buffer[i].x = event->x;
3798                                 view->drag_info.buffer[i].y = event->y;
3799                         }
3800                         view->drag_info.momentum.x = 0;
3801                         view->drag_info.momentum.y = 0;
3802                 }
3803
3804                 if (view->drag_info.in_drag) {
3805                         int dx, dy;
3806                         gdouble dhadj_value, dvadj_value;
3807
3808                         view->drag_info.buffer[0].x = event->x;
3809                         view->drag_info.buffer[0].y = event->y;
3810
3811                         dx = event->x_root - view->drag_info.start.x;
3812                         dy = event->y_root - view->drag_info.start.y;
3813
3814                         dhadj_value = view->hadjustment->page_size *
3815                                       (gdouble)dx / widget->allocation.width;
3816                         dvadj_value = view->vadjustment->page_size *
3817                                       (gdouble)dy / widget->allocation.height;
3818
3819                         /* clamp scrolling to visible area */
3820                         gtk_adjustment_set_value (view->hadjustment,
3821                                                   MIN(view->drag_info.hadj - dhadj_value,
3822                                                       view->hadjustment->upper -
3823                                                       view->hadjustment->page_size));
3824                         gtk_adjustment_set_value (view->vadjustment,
3825                                                   MIN(view->drag_info.vadj - dvadj_value,
3826                                                       view->vadjustment->upper -
3827                                                       view->vadjustment->page_size));
3828
3829                         return TRUE;
3830                 }
3831
3832                 break;
3833         default:
3834                 ev_view_handle_cursor_over_xy (view, x, y);
3835         }
3836
3837         return FALSE;
3838 }
3839
3840 static gboolean
3841 ev_view_button_release_event (GtkWidget      *widget,
3842                               GdkEventButton *event)
3843 {
3844         EvView *view = EV_VIEW (widget);
3845         EvLink *link = NULL;
3846
3847         view->image_dnd_info.in_drag = FALSE;
3848
3849         if (view->scroll_info.autoscrolling) {
3850                 ev_view_autoscroll_stop (view);
3851                 view->pressed_button = -1;
3852
3853                 return TRUE;
3854         }
3855
3856         if (view->drag_info.in_drag) {
3857                 view->drag_info.release_timeout_id =
3858                         g_timeout_add (20,
3859                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3860         }
3861
3862         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3863                 link = ev_view_get_link_at_location (view, event->x, event->y);
3864         }
3865
3866         view->drag_info.in_drag = FALSE;
3867
3868         if (view->pressed_button == 2) {
3869                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3870         }
3871
3872         view->pressed_button = -1;
3873
3874         if (view->selection_scroll_id) {
3875             g_source_remove (view->selection_scroll_id);
3876             view->selection_scroll_id = 0;
3877         }
3878         if (view->selection_update_id) {
3879             g_source_remove (view->selection_update_id);
3880             view->selection_update_id = 0;
3881         }
3882
3883         if (view->selection_info.selections) {
3884                 clear_link_selected (view);
3885                 ev_view_update_primary_selection (view);
3886
3887                 if (view->selection_info.in_drag) {
3888                         clear_selection (view);
3889                         gtk_widget_queue_draw (widget);
3890                 }
3891
3892                 view->selection_info.in_drag = FALSE;
3893         } else if (link) {
3894                 if (event->button == 2) {
3895                         EvLinkAction    *action;
3896                         EvLinkActionType type;
3897
3898                         action = ev_link_get_action (link);
3899                         if (!action)
3900                                 return FALSE;
3901
3902                         type = ev_link_action_get_action_type (action);
3903                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3904                                 g_signal_emit (view,
3905                                                signals[SIGNAL_EXTERNAL_LINK],
3906                                                0, action);
3907                         }
3908                 } else {
3909                         ev_view_handle_link (view, link);
3910                 }
3911         } else if (view->presentation) {
3912                 switch (event->button) {
3913                         case 1:
3914                                 ev_view_next_page (view);
3915                                 return TRUE;
3916                         case 3:
3917                                 ev_view_previous_page (view);
3918                                 return TRUE;
3919                 }
3920         }
3921
3922         return FALSE;
3923 }
3924
3925 /* Goto Window */
3926 /* Cut and paste from gtkwindow.c */
3927 static void
3928 send_focus_change (GtkWidget *widget,
3929                    gboolean   in)
3930 {
3931         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3932
3933         g_object_ref (widget);
3934
3935         if (in)
3936                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3937         else
3938                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3939
3940         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3941         fevent->focus_change.window = g_object_ref (widget->window);
3942         fevent->focus_change.in = in;
3943
3944         gtk_widget_event (widget, fevent);
3945
3946         g_object_notify (G_OBJECT (widget), "has-focus");
3947
3948         g_object_unref (widget);
3949         gdk_event_free (fevent);
3950 }
3951
3952 static void
3953 ev_view_goto_window_hide (EvView *view)
3954 {
3955         /* send focus-in event */
3956         send_focus_change (view->goto_entry, FALSE);
3957         gtk_widget_hide (view->goto_window);
3958         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3959 }
3960
3961 static gboolean
3962 ev_view_goto_window_delete_event (GtkWidget   *widget,
3963                                   GdkEventAny *event,
3964                                   EvView      *view)
3965 {
3966         ev_view_goto_window_hide (view);
3967
3968         return TRUE;
3969 }
3970
3971 static gboolean
3972 key_is_numeric (guint keyval)
3973 {
3974         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3975                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3976 }
3977
3978 static gboolean
3979 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3980                                      GdkEventKey *event,
3981                                      EvView      *view)
3982 {
3983         switch (event->keyval) {
3984                 case GDK_Escape:
3985                 case GDK_Tab:
3986                 case GDK_KP_Tab:
3987                 case GDK_ISO_Left_Tab:
3988                         ev_view_goto_window_hide (view);
3989                         return TRUE;
3990                 case GDK_Return:
3991                 case GDK_KP_Enter:
3992                 case GDK_ISO_Enter:
3993                 case GDK_BackSpace:
3994                 case GDK_Delete:
3995                         return FALSE;
3996                 default:
3997                         if (!key_is_numeric (event->keyval))
3998                                 return TRUE;
3999         }
4000
4001         return FALSE;
4002 }
4003
4004 static gboolean
4005 ev_view_goto_window_button_press_event (GtkWidget      *widget,
4006                                         GdkEventButton *event,
4007                                         EvView         *view)
4008 {
4009         ev_view_goto_window_hide (view);
4010
4011         return TRUE;
4012 }
4013
4014 static void
4015 ev_view_goto_entry_activate (GtkEntry *entry,
4016                              EvView   *view)
4017 {
4018         const gchar *text;
4019         gint         page;
4020
4021         text = gtk_entry_get_text (entry);
4022         page = atoi (text) - 1;
4023
4024         ev_view_goto_window_hide (view);
4025
4026         if (page >= 0 && page < ev_document_get_n_pages (view->document)) {
4027                 ev_document_model_set_page (view->model, page);
4028         }
4029 }
4030
4031 static void
4032 ev_view_goto_window_create (EvView *view)
4033 {
4034         GtkWidget *frame, *hbox, *toplevel, *label;
4035
4036         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
4037
4038         if (view->goto_window) {
4039                 if (GTK_WINDOW (toplevel)->group)
4040                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
4041                                                      GTK_WINDOW (view->goto_window));
4042                 else if (GTK_WINDOW (view->goto_window)->group)
4043                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
4044                                                         GTK_WINDOW (view->goto_window));
4045                 return;
4046         }
4047
4048         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
4049         gtk_window_set_screen (GTK_WINDOW (view->goto_window),
4050                                gtk_widget_get_screen (GTK_WIDGET (view)));
4051
4052         if (GTK_WINDOW (toplevel)->group)
4053                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
4054                                              GTK_WINDOW (view->goto_window));
4055
4056         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
4057
4058         g_signal_connect (view->goto_window, "delete_event",
4059                           G_CALLBACK (ev_view_goto_window_delete_event),
4060                           view);
4061         g_signal_connect (view->goto_window, "key_press_event",
4062                           G_CALLBACK (ev_view_goto_window_key_press_event),
4063                           view);
4064         g_signal_connect (view->goto_window, "button_press_event",
4065                           G_CALLBACK (ev_view_goto_window_button_press_event),
4066                           view);
4067
4068         frame = gtk_frame_new (NULL);
4069         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
4070         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
4071         gtk_widget_show (frame);
4072
4073         hbox = gtk_hbox_new (FALSE, 0);
4074         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
4075         gtk_container_add (GTK_CONTAINER (frame), hbox);
4076         gtk_widget_show (hbox);
4077
4078         label = gtk_label_new(_("Jump to page:"));
4079         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
4080         gtk_widget_show (label);
4081         gtk_widget_realize (label);
4082
4083         view->goto_entry = gtk_entry_new ();
4084         g_signal_connect (view->goto_entry, "activate",
4085                           G_CALLBACK (ev_view_goto_entry_activate),
4086                           view);
4087         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
4088         gtk_widget_show (view->goto_entry);
4089         gtk_widget_realize (view->goto_entry);
4090 }
4091
4092 static void
4093 ev_view_goto_entry_grab_focus (EvView *view)
4094 {
4095         GtkWidgetClass *entry_parent_class;
4096
4097         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
4098         (entry_parent_class->grab_focus) (view->goto_entry);
4099
4100         send_focus_change (view->goto_entry, TRUE);
4101 }
4102
4103 static void
4104 ev_view_goto_window_send_key_event (EvView   *view,
4105                                     GdkEvent *event)
4106 {
4107         GdkEventKey *new_event;
4108         GdkScreen   *screen;
4109
4110         /* Move goto window off screen */
4111         screen = gtk_widget_get_screen (GTK_WIDGET (view));
4112         gtk_window_move (GTK_WINDOW (view->goto_window),
4113                          gdk_screen_get_width (screen) + 1,
4114                          gdk_screen_get_height (screen) + 1);
4115         gtk_widget_show (view->goto_window);
4116
4117         new_event = (GdkEventKey *) gdk_event_copy (event);
4118         g_object_unref (new_event->window);
4119         new_event->window = g_object_ref (view->goto_window->window);
4120         gtk_widget_realize (view->goto_window);
4121
4122         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
4123         gdk_event_free ((GdkEvent *)new_event);
4124         gtk_widget_hide (view->goto_window);
4125 }
4126
4127 static gboolean
4128 ev_view_key_press_event (GtkWidget   *widget,
4129                          GdkEventKey *event)
4130 {
4131         EvView *view = EV_VIEW (widget);
4132         EvPresentationState current;
4133
4134         if (!view->document)
4135                 return FALSE;
4136
4137         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
4138                 /* Forward key events to current focused window child */
4139                 if (view->window_child_focus) {
4140                         GdkEventKey *new_event;
4141                         gboolean     handled;
4142
4143                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
4144                         g_object_unref (new_event->window);
4145                         new_event->window = g_object_ref (view->window_child_focus->window->window);
4146                         gtk_widget_realize (view->window_child_focus->window);
4147                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
4148                         gdk_event_free ((GdkEvent *)new_event);
4149
4150                         return handled;
4151                 }
4152
4153                 return FALSE;
4154         }
4155
4156         if (!view->presentation ||
4157             view->presentation_state == EV_PRESENTATION_END)
4158                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4159
4160
4161         current = view->presentation_state;
4162
4163         switch (event->keyval) {
4164                 case GDK_b:
4165                 case GDK_B:
4166                 case GDK_period:
4167                 case GDK_KP_Decimal:
4168                         view->presentation_state =
4169                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
4170                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
4171                         break;
4172                 case GDK_w:
4173                 case GDK_W:
4174                         view->presentation_state =
4175                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
4176                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
4177                         break;
4178                 default:
4179                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
4180                             view->presentation_state == EV_PRESENTATION_WHITE) {
4181                                 view->presentation_state = EV_PRESENTATION_NORMAL;
4182                         }
4183         }
4184
4185         if (current == view->presentation_state) {
4186                 if (ev_document_get_n_pages (view->document) > 1 &&
4187                     key_is_numeric (event->keyval)) {
4188                         gint x, y;
4189
4190                         ev_view_goto_window_create (view);
4191                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
4192                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4193                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
4194                         gtk_widget_show (view->goto_window);
4195                         ev_view_goto_entry_grab_focus (view);
4196
4197                         return TRUE;
4198                 }
4199
4200                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4201         }
4202
4203         switch (view->presentation_state) {
4204                 case EV_PRESENTATION_NORMAL:
4205                 case EV_PRESENTATION_BLACK:
4206                         gdk_window_set_background (view->layout.bin_window,
4207                                                    &widget->style->black);
4208                         break;
4209                 case EV_PRESENTATION_WHITE:
4210                         gdk_window_set_background (view->layout.bin_window,
4211                                                    &widget->style->white);
4212                         break;
4213                 default:
4214                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4215         }
4216
4217         gtk_widget_queue_draw (widget);
4218         return TRUE;
4219 }
4220
4221 static gint
4222 ev_view_focus_in (GtkWidget     *widget,
4223                   GdkEventFocus *event)
4224 {
4225         if (EV_VIEW (widget)->pixbuf_cache)
4226                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4227         gtk_widget_queue_draw (widget);
4228
4229         return FALSE;
4230 }
4231
4232 static gint
4233 ev_view_focus_out (GtkWidget     *widget,
4234                      GdkEventFocus *event)
4235 {
4236         if (EV_VIEW (widget)->goto_window)
4237                 ev_view_goto_window_hide (EV_VIEW (widget));
4238
4239         if (EV_VIEW (widget)->pixbuf_cache)
4240                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4241         gtk_widget_queue_draw (widget);
4242
4243         return FALSE;
4244 }
4245
4246 static gboolean
4247 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4248 {
4249         EvView *view = EV_VIEW (widget);
4250
4251         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4252                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4253
4254         return FALSE;
4255 }
4256
4257 static gboolean
4258 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4259 {
4260         EvView *view = EV_VIEW (widget);
4261
4262         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4263
4264         return FALSE;
4265 }
4266
4267 static void
4268 ev_view_style_set (GtkWidget *widget,
4269                    GtkStyle  *old_style)
4270 {
4271         if (EV_VIEW (widget)->pixbuf_cache)
4272                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4273
4274         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
4275 }
4276
4277 /*** Drawing ***/
4278
4279 static guint32
4280 ev_gdk_color_to_rgb (const GdkColor *color)
4281 {
4282   guint32 result;
4283   result = (0xff0000 | (color->red & 0xff00));
4284   result <<= 8;
4285   result |= ((color->green & 0xff00) | (color->blue >> 8));
4286   return result;
4287 }
4288
4289 static void
4290 draw_rubberband (GtkWidget *widget, GdkWindow *window,
4291                  const GdkRectangle *rect, guchar alpha)
4292 {
4293         GdkGC *gc;
4294         GdkPixbuf *pixbuf;
4295         GdkColor *fill_color_gdk;
4296         guint fill_color;
4297
4298         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
4299         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
4300
4301         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
4302                                  rect->width, rect->height);
4303         gdk_pixbuf_fill (pixbuf, fill_color);
4304
4305         gdk_draw_pixbuf (window, NULL, pixbuf,
4306                          0, 0,
4307                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4308                          rect->width, rect->height,
4309                          GDK_RGB_DITHER_NONE,
4310                          0, 0);
4311
4312         g_object_unref (pixbuf);
4313
4314         gc = gdk_gc_new (window);
4315         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
4316         gdk_draw_rectangle (window, gc, FALSE,
4317                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4318                             rect->width - 1,
4319                             rect->height - 1);
4320         g_object_unref (gc);
4321
4322         gdk_color_free (fill_color_gdk);
4323 }
4324
4325
4326 static void
4327 highlight_find_results (EvView *view, int page)
4328 {
4329         gint i, n_results = 0;
4330
4331         n_results = ev_view_find_get_n_results (view, page);
4332
4333         for (i = 0; i < n_results; i++) {
4334                 EvRectangle *rectangle;
4335                 GdkRectangle view_rectangle;
4336                 guchar alpha;
4337
4338                 if (i == view->find_result && page == view->current_page) {
4339                         alpha = 0x90;
4340                 } else {
4341                         alpha = 0x20;
4342                 }
4343
4344                 rectangle = ev_view_find_get_result (view, page, i);
4345                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4346                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
4347                                  &view_rectangle, alpha);
4348         }
4349 }
4350
4351 static void
4352 draw_loading_text (EvView       *view,
4353                    GdkRectangle *page_area,
4354                    GdkRectangle *expose_area)
4355 {
4356         cairo_t *cr;
4357         gint     width, height;
4358
4359         if (!view->loading_text) {
4360                 const gchar *loading_text = _("Loading...");
4361                 PangoLayout *layout;
4362                 PangoFontDescription *font_desc;
4363                 PangoRectangle logical_rect;
4364                 gint target_width;
4365                 gdouble real_scale;
4366
4367                 ev_document_fc_mutex_lock ();
4368
4369                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
4370
4371                 font_desc = pango_font_description_new ();
4372
4373                 /* We set the font to be 10 points, get the size, and scale appropriately */
4374                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
4375                 pango_layout_set_font_description (layout, font_desc);
4376                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4377
4378                 target_width = MAX (page_area->width / 2, 1);
4379                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
4380                 pango_font_description_set_size (font_desc, (int)real_scale);
4381                 pango_layout_set_font_description (layout, font_desc);
4382                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4383
4384                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
4385                                                                  logical_rect.width,
4386                                                                  logical_rect.height);
4387                 cr = cairo_create (view->loading_text);
4388                 cairo_set_source_rgb (cr,
4389                                       155 / (double)255,
4390                                       155 / (double)255,
4391                                       155 / (double)255);
4392                 pango_cairo_show_layout (cr, layout);
4393                 cairo_destroy (cr);
4394
4395                 pango_font_description_free (font_desc);
4396                 g_object_unref (layout);
4397
4398                 ev_document_fc_mutex_unlock ();
4399         }
4400
4401         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
4402         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
4403
4404         cr = gdk_cairo_create (view->layout.bin_window);
4405         cairo_translate (cr,
4406                          page_area->x + width,
4407                          page_area->y + height);
4408         cairo_set_source_surface (cr, view->loading_text, 0, 0);
4409         cairo_paint (cr);
4410         cairo_destroy (cr);
4411 }
4412
4413 static void
4414 draw_one_page (EvView       *view,
4415                gint          page,
4416                cairo_t      *cr,
4417                GdkRectangle *page_area,
4418                GtkBorder    *border,
4419                GdkRectangle *expose_area,
4420                gboolean     *page_ready)
4421 {
4422         GdkRectangle overlap;
4423         GdkRectangle real_page_area;
4424
4425         g_assert (view->document);
4426
4427         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4428                 return;
4429
4430         /* Render the document itself */
4431         real_page_area = *page_area;
4432
4433         real_page_area.x += border->left;
4434         real_page_area.y += border->top;
4435         real_page_area.width -= (border->left + border->right);
4436         real_page_area.height -= (border->top + border->bottom);
4437         *page_ready = TRUE;
4438
4439         if (!view->presentation) {
4440                 gint current_page;
4441
4442                 current_page = ev_document_model_get_page (view->model);
4443                 ev_document_misc_paint_one_page (view->layout.bin_window,
4444                                                  GTK_WIDGET (view),
4445                                                  page_area, border,
4446                                                  page == current_page);
4447         }
4448
4449         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4450                 gint             width, height;
4451                 gint             page_width, page_height;
4452                 cairo_surface_t *page_surface = NULL;
4453                 gint             selection_width, selection_height;
4454                 cairo_surface_t *selection_surface = NULL;
4455
4456                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4457
4458                 if (!page_surface) {
4459                         if (!view->presentation) {
4460                                 draw_loading_text (view,
4461                                                    &real_page_area,
4462                                                    expose_area);
4463                         }
4464
4465                         *page_ready = FALSE;
4466
4467                         return;
4468                 }
4469
4470                 ev_view_get_page_size (view, page, &width, &height);
4471
4472                 page_width = cairo_image_surface_get_width (page_surface);
4473                 page_height = cairo_image_surface_get_height (page_surface);
4474
4475                 cairo_save (cr);
4476                 cairo_translate (cr, overlap.x, overlap.y);
4477
4478                 if (width != page_width || height != page_height) {
4479                         cairo_pattern_set_filter (cairo_get_source (cr),
4480                                                   CAIRO_FILTER_FAST);
4481                         cairo_scale (cr,
4482                                      (gdouble)width / page_width,
4483                                      (gdouble)height / page_height);
4484                 }
4485
4486                 cairo_surface_set_device_offset (page_surface,
4487                                                  overlap.x - real_page_area.x,
4488                                                  overlap.y - real_page_area.y);
4489                 cairo_set_source_surface (cr, page_surface, 0, 0);
4490                 cairo_paint (cr);
4491                 cairo_restore (cr);
4492
4493                 /* Get the selection pixbuf iff we have something to draw */
4494                 if (find_selection_for_page (view, page) &&
4495                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4496                         selection_surface =
4497                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4498                                                                        page,
4499                                                                        view->scale,
4500                                                                        NULL);
4501                 }
4502
4503                 if (!selection_surface) {
4504                         return;
4505                 }
4506
4507                 selection_width = cairo_image_surface_get_width (selection_surface);
4508                 selection_height = cairo_image_surface_get_height (selection_surface);
4509
4510                 cairo_save (cr);
4511                 cairo_translate (cr, overlap.x, overlap.y);
4512
4513                 if (width != selection_width || height != selection_height) {
4514                         cairo_pattern_set_filter (cairo_get_source (cr),
4515                                                   CAIRO_FILTER_FAST);
4516                         cairo_scale (cr,
4517                                      (gdouble)width / selection_width,
4518                                      (gdouble)height / selection_height);
4519                 }
4520
4521                 cairo_surface_set_device_offset (selection_surface,
4522                                                  overlap.x - real_page_area.x,
4523                                                  overlap.y - real_page_area.y);
4524                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4525                 cairo_paint (cr);
4526                 cairo_restore (cr);
4527         }
4528 }
4529
4530 /*** GObject functions ***/
4531
4532 static void
4533 ev_view_finalize (GObject *object)
4534 {
4535         EvView *view = EV_VIEW (object);
4536
4537         clear_selection (view);
4538         clear_link_selected (view);
4539
4540         if (view->image_dnd_info.image)
4541                 g_object_unref (view->image_dnd_info.image);
4542         view->image_dnd_info.image = NULL;
4543
4544         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4545 }
4546
4547 static void
4548 ev_view_destroy (GtkObject *object)
4549 {
4550         EvView *view = EV_VIEW (object);
4551
4552         if (view->model) {
4553                 g_object_unref (view->model);
4554                 view->model = NULL;
4555         }
4556
4557         if (view->document) {
4558                 g_object_unref (view->document);
4559                 view->document = NULL;
4560         }
4561
4562         if (view->pixbuf_cache) {
4563                 g_object_unref (view->pixbuf_cache);
4564                 view->pixbuf_cache = NULL;
4565         }
4566
4567         if (view->page_cache) {
4568                 g_object_unref (view->page_cache);
4569                 view->page_cache = NULL;
4570         }
4571
4572         if (view->goto_window) {
4573                 gtk_widget_destroy (view->goto_window);
4574                 view->goto_window = NULL;
4575                 view->goto_entry = NULL;
4576         }
4577
4578         ev_view_window_children_free (view);
4579
4580         if (view->selection_scroll_id) {
4581             g_source_remove (view->selection_scroll_id);
4582             view->selection_scroll_id = 0;
4583         }
4584
4585         if (view->selection_update_id) {
4586             g_source_remove (view->selection_update_id);
4587             view->selection_update_id = 0;
4588         }
4589
4590         if (view->loading_text) {
4591                 cairo_surface_destroy (view->loading_text);
4592                 view->loading_text = NULL;
4593         }
4594
4595         if (view->scroll_info.timeout_id) {
4596             g_source_remove (view->scroll_info.timeout_id);
4597             view->scroll_info.timeout_id = 0;
4598         }
4599
4600         if (view->drag_info.drag_timeout_id) {
4601                 g_source_remove (view->drag_info.drag_timeout_id);
4602                 view->drag_info.drag_timeout_id = 0;
4603         }
4604
4605         if (view->drag_info.release_timeout_id) {
4606                 g_source_remove (view->drag_info.release_timeout_id);
4607                 view->drag_info.release_timeout_id = 0;
4608         }
4609
4610         ev_view_presentation_transition_stop (view);
4611
4612         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4613
4614         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4615 }
4616
4617 static void
4618 ev_view_set_property (GObject      *object,
4619                       guint         prop_id,
4620                       const GValue *value,
4621                       GParamSpec   *pspec)
4622 {
4623         EvView *view = EV_VIEW (object);
4624
4625         switch (prop_id) {
4626                 case PROP_PRESENTATION:
4627                         ev_view_set_presentation (view, g_value_get_boolean (value));
4628                         break;
4629                 default:
4630                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4631         }
4632 }
4633
4634 static AtkObject *
4635 ev_view_get_accessible (GtkWidget *widget)
4636 {
4637         static gboolean first_time = TRUE;
4638
4639         if (first_time) {
4640                 AtkObjectFactory *factory;
4641                 AtkRegistry *registry;
4642                 GType derived_type;
4643                 GType derived_atk_type;
4644
4645                 /*
4646                  * Figure out whether accessibility is enabled by looking at the
4647                  * type of the accessible object which would be created for
4648                  * the parent type of EvView.
4649                  */
4650                 derived_type = g_type_parent (EV_TYPE_VIEW);
4651
4652                 registry = atk_get_default_registry ();
4653                 factory = atk_registry_get_factory (registry,
4654                                                     derived_type);
4655                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4656                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4657                         atk_registry_set_factory_type (registry,
4658                                                        EV_TYPE_VIEW,
4659                                                        ev_view_accessible_factory_get_type ());
4660                 first_time = FALSE;
4661         }
4662         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4663 }
4664
4665 static void
4666 ev_view_get_property (GObject *object,
4667                       guint prop_id,
4668                       GValue *value,
4669                       GParamSpec *pspec)
4670 {
4671         EvView *view = EV_VIEW (object);
4672
4673         switch (prop_id) {
4674                 case PROP_PRESENTATION:
4675                         g_value_set_boolean (value, view->presentation);
4676                         break;
4677                 case PROP_HAS_SELECTION:
4678                         g_value_set_boolean (value,
4679                                              view->selection_info.selections != NULL);
4680                         break;
4681                 default:
4682                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4683         }
4684 }
4685
4686 static void
4687 ev_view_class_init (EvViewClass *class)
4688 {
4689         GObjectClass *object_class = G_OBJECT_CLASS (class);
4690         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4691         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4692         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4693         GtkBindingSet *binding_set;
4694
4695         object_class->finalize = ev_view_finalize;
4696         object_class->set_property = ev_view_set_property;
4697         object_class->get_property = ev_view_get_property;
4698
4699         widget_class->expose_event = ev_view_expose_event;
4700         widget_class->button_press_event = ev_view_button_press_event;
4701         widget_class->motion_notify_event = ev_view_motion_notify_event;
4702         widget_class->button_release_event = ev_view_button_release_event;
4703         widget_class->key_press_event = ev_view_key_press_event;
4704         widget_class->focus_in_event = ev_view_focus_in;
4705         widget_class->focus_out_event = ev_view_focus_out;
4706         widget_class->get_accessible = ev_view_get_accessible;
4707         widget_class->size_request = ev_view_size_request;
4708         widget_class->size_allocate = ev_view_size_allocate;
4709         widget_class->realize = ev_view_realize;
4710         widget_class->scroll_event = ev_view_scroll_event;
4711         widget_class->enter_notify_event = ev_view_enter_notify_event;
4712         widget_class->leave_notify_event = ev_view_leave_notify_event;
4713         widget_class->style_set = ev_view_style_set;
4714         widget_class->drag_data_get = ev_view_drag_data_get;
4715         widget_class->drag_motion = ev_view_drag_motion;
4716         widget_class->popup_menu = ev_view_popup_menu;
4717         widget_class->query_tooltip = ev_view_query_tooltip;
4718
4719         gtk_object_class->destroy = ev_view_destroy;
4720
4721         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4722
4723         class->binding_activated = ev_view_scroll;
4724
4725         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4726                          G_TYPE_FROM_CLASS (object_class),
4727                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4728                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4729                          NULL, NULL,
4730                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4731                          G_TYPE_NONE, 2,
4732                          GTK_TYPE_SCROLL_TYPE,
4733                          G_TYPE_BOOLEAN);
4734         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4735                          G_TYPE_FROM_CLASS (object_class),
4736                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4737                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4738                          NULL, NULL,
4739                          g_cclosure_marshal_VOID__OBJECT,
4740                          G_TYPE_NONE, 1,
4741                          G_TYPE_OBJECT);
4742         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4743                          G_TYPE_FROM_CLASS (object_class),
4744                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4745                          G_STRUCT_OFFSET (EvViewClass, external_link),
4746                          NULL, NULL,
4747                          g_cclosure_marshal_VOID__OBJECT,
4748                          G_TYPE_NONE, 1,
4749                          G_TYPE_OBJECT);
4750         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4751                          G_TYPE_FROM_CLASS (object_class),
4752                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4753                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4754                          NULL, NULL,
4755                          g_cclosure_marshal_VOID__OBJECT,
4756                          G_TYPE_NONE, 1,
4757                          G_TYPE_OBJECT);
4758
4759
4760         g_object_class_install_property (object_class,
4761                                          PROP_PRESENTATION,
4762                                          g_param_spec_boolean ("presentation",
4763                                                                "Presentation",
4764                                                                "Draw page in presentation mode",
4765                                                                TRUE,
4766                                                                G_PARAM_READWRITE));
4767         g_object_class_install_property (object_class,
4768                                          PROP_HAS_SELECTION,
4769                                          g_param_spec_boolean ("has-selection",
4770                                                                "Has selection",
4771                                                                "The view has selections",
4772                                                                FALSE,
4773                                                                G_PARAM_READABLE));
4774
4775         binding_set = gtk_binding_set_by_class (class);
4776
4777         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4778         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4779         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4780         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4781         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4782         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4783         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4784         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4785         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4786                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4787         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4788                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4789         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4790                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4791         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4792                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4793
4794 }
4795
4796 static void
4797 ev_view_init (EvView *view)
4798 {
4799         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4800
4801         view->start_page = -1;
4802         view->end_page = -1;
4803         view->spacing = 5;
4804         view->scale = 1.0;
4805         view->current_page = 0;
4806         view->pressed_button = -1;
4807         view->cursor = EV_VIEW_CURSOR_NORMAL;
4808         view->drag_info.in_drag = FALSE;
4809         view->scroll_info.autoscrolling = FALSE;
4810         view->selection_info.selections = NULL;
4811         view->selection_info.in_selection = FALSE;
4812         view->selection_info.in_drag = FALSE;
4813         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4814         view->continuous = TRUE;
4815         view->dual_page = FALSE;
4816         view->presentation = FALSE;
4817         view->presentation_state = EV_PRESENTATION_NORMAL;
4818         view->fullscreen = FALSE;
4819         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4820         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4821         view->jump_to_find_result = TRUE;
4822         view->highlight_find_results = FALSE;
4823
4824         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4825         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4826 }
4827
4828 /*** Callbacks ***/
4829
4830 static void
4831 ev_view_change_page (EvView *view,
4832                      gint    new_page,
4833                      gboolean start_transition)
4834 {
4835         gint x, y;
4836
4837         view->current_page = new_page;
4838         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4839
4840         if (view->presentation && start_transition)
4841                 ev_view_presentation_transition_start (view);
4842
4843         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4844         ev_view_handle_cursor_over_xy (view, x, y);
4845
4846         gtk_widget_queue_resize (GTK_WIDGET (view));
4847 }
4848
4849 static void
4850 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4851                                      EvView                *view)
4852 {
4853         g_object_unref (view->animation);
4854         view->animation = NULL;
4855         ev_view_change_page (view, view->current_page, TRUE);
4856 }
4857
4858 /**
4859  * ev_view_transition_animation_cancel:
4860  * @animation: Animation to finish
4861  * @view: An EvView
4862  *
4863  * Does almost the same as cancel, but without scheduling the transition.
4864  */
4865
4866 static void
4867 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4868                                      EvView                *view)
4869 {
4870         g_object_unref (view->animation);
4871         view->animation = NULL;
4872         ev_view_change_page (view, view->current_page, FALSE);
4873 }
4874
4875 static void
4876 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4877                                     gdouble                progress,
4878                                     EvView                *view)
4879 {
4880         gtk_widget_queue_draw (GTK_WIDGET (view));
4881 }
4882
4883 static void
4884 ev_view_presentation_animation_start (EvView *view,
4885                                       int     new_page)
4886 {
4887         EvTransitionEffect *effect = NULL;
4888         cairo_surface_t *surface;
4889
4890         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4891                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4892                                                             view->current_page);
4893         if (!effect)
4894                 return;
4895
4896         view->animation = ev_transition_animation_new (effect);
4897
4898         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4899         ev_transition_animation_set_origin_surface (view->animation, surface);
4900         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, new_page);
4901         if (surface)
4902                 ev_transition_animation_set_dest_surface (view->animation, surface);
4903
4904         g_signal_connect (view->animation, "frame",
4905                           G_CALLBACK (ev_view_transition_animation_frame), view);
4906         g_signal_connect (view->animation, "finished",
4907                           G_CALLBACK (ev_view_transition_animation_finish), view);
4908 }
4909
4910 static void
4911 job_finished_cb (EvPixbufCache *pixbuf_cache,
4912                  GdkRegion     *region,
4913                  EvView        *view)
4914 {
4915         if (view->animation) {
4916                 cairo_surface_t *surface;
4917
4918                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4919                 ev_transition_animation_set_dest_surface (view->animation, surface);
4920         }
4921
4922         if (region) {
4923                 gdk_window_invalidate_region (view->layout.bin_window,
4924                                               region, TRUE);
4925         } else {
4926                 gtk_widget_queue_draw (GTK_WIDGET (view));
4927         }
4928 }
4929
4930 static void
4931 ev_view_page_changed_cb (EvDocumentModel *model,
4932                          gint             old_page,
4933                          gint             new_page,
4934                          EvView          *view)
4935 {
4936         if (!view->document)
4937                 return;
4938
4939         if (view->current_page != new_page) {
4940                 if (view->presentation)
4941                         ev_view_presentation_animation_start (view, new_page);
4942
4943                 ev_view_change_page (view, new_page, TRUE);
4944         } else {
4945                 gtk_widget_queue_draw (GTK_WIDGET (view));
4946         }
4947
4948         view->find_result = 0;
4949 }
4950
4951 static void
4952 on_adjustment_value_changed (GtkAdjustment *adjustment,
4953                              EvView        *view)
4954 {
4955         int dx = 0, dy = 0;
4956         gint x, y;
4957         GList *children, *l;
4958
4959         if (! GTK_WIDGET_REALIZED (view))
4960                 return;
4961
4962         if (view->hadjustment) {
4963                 dx = view->scroll_x - (int) view->hadjustment->value;
4964                 view->scroll_x = (int) view->hadjustment->value;
4965         } else {
4966                 view->scroll_x = 0;
4967         }
4968
4969         if (view->vadjustment) {
4970                 dy = view->scroll_y - (int) view->vadjustment->value;
4971                 view->scroll_y = (int) view->vadjustment->value;
4972         } else {
4973                 view->scroll_y = 0;
4974         }
4975
4976         children = gtk_container_get_children (GTK_CONTAINER (view));
4977         for (l = children; l && l->data; l = g_list_next (l)) {
4978                 gint       child_x, child_y;
4979                 GtkWidget *child = (GtkWidget *)l->data;
4980
4981                 gtk_container_child_get (GTK_CONTAINER (view),
4982                                          child,
4983                                          "x", &child_x,
4984                                          "y", &child_y,
4985                                          NULL);
4986                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4987         }
4988         g_list_free (children);
4989
4990         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4991                 EvViewWindowChild *child;
4992
4993                 child = (EvViewWindowChild *)l->data;
4994
4995                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4996         }
4997
4998         if (view->pending_resize)
4999                 gtk_widget_queue_draw (GTK_WIDGET (view));
5000         else
5001                 gdk_window_scroll (view->layout.bin_window, dx, dy);
5002
5003         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5004         ev_view_handle_cursor_over_xy (view, x, y);
5005
5006         if (view->document)
5007                 view_update_range_and_current_page (view);
5008 }
5009
5010 GtkWidget*
5011 ev_view_new (void)
5012 {
5013         GtkWidget *view;
5014
5015         view = g_object_new (EV_TYPE_VIEW, NULL);
5016
5017         return view;
5018 }
5019
5020 static void
5021 setup_caches (EvView *view)
5022 {
5023         gboolean inverted_colors;
5024
5025         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
5026         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
5027         view->page_cache = ev_page_cache_new (view->document);
5028         inverted_colors = ev_document_model_get_inverted_colors (view->model);
5029         ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
5030         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
5031 }
5032
5033 static void
5034 clear_caches (EvView *view)
5035 {
5036         if (view->pixbuf_cache) {
5037                 g_object_unref (view->pixbuf_cache);
5038                 view->pixbuf_cache = NULL;
5039         }
5040
5041         if (view->page_cache) {
5042                 g_object_unref (view->page_cache);
5043                 view->page_cache = NULL;
5044         }
5045 }
5046
5047 void
5048 ev_view_set_loading (EvView       *view,
5049                      gboolean      loading)
5050 {
5051         view->loading = loading;
5052         gtk_widget_queue_draw (GTK_WIDGET (view));
5053 }
5054
5055 static gboolean
5056 ev_view_autoscroll_cb (EvView *view)
5057 {
5058         gdouble speed, value;
5059
5060         /* If the user stops autoscrolling, autoscrolling will be
5061          * set to false but the timeout will continue; stop the timeout: */
5062         if (!view->scroll_info.autoscrolling) {
5063                 view->scroll_info.timeout_id = 0;
5064                 return FALSE;
5065         }
5066
5067         if (view->scroll_info.last_y > view->scroll_info.start_y &&
5068                 (view->scroll_info.last_y < view->scroll_info.start_y))
5069                 return TRUE;
5070
5071         /* Replace 100 with your speed of choice: The lower the faster.
5072          * Replace 3 with another speed of choice: The higher, the faster it accelerated
5073          *      based on the distance of the starting point from the mouse
5074          * (All also effected by the timeout interval of this callback) */
5075
5076         if (view->scroll_info.start_y > view->scroll_info.last_y)
5077                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
5078         else
5079                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
5080
5081         value = gtk_adjustment_get_value (view->vadjustment);
5082         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
5083         gtk_adjustment_set_value (view->vadjustment, value);
5084
5085         return TRUE;
5086
5087 }
5088
5089 void
5090 ev_view_autoscroll_start (EvView *view)
5091 {
5092         gint x, y;
5093
5094         g_return_if_fail (EV_IS_VIEW (view));
5095
5096         if (view->scroll_info.autoscrolling)
5097                 return;
5098
5099         view->scroll_info.autoscrolling = TRUE;
5100         view->scroll_info.timeout_id =
5101                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5102                                view);
5103
5104         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5105         ev_view_handle_cursor_over_xy (view, x, y);
5106 }
5107
5108 void
5109 ev_view_autoscroll_stop (EvView *view)
5110 {
5111         gint x, y;
5112
5113         g_return_if_fail (EV_IS_VIEW (view));
5114
5115         if (!view->scroll_info.autoscrolling)
5116                 return;
5117
5118         view->scroll_info.autoscrolling = FALSE;
5119         if (view->scroll_info.timeout_id) {
5120                 g_source_remove (view->scroll_info.timeout_id);
5121                 view->scroll_info.timeout_id = 0;
5122         }
5123
5124         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5125         ev_view_handle_cursor_over_xy (view, x, y);
5126 }
5127
5128 static void
5129 ev_view_document_changed_cb (EvDocumentModel *model,
5130                              GParamSpec      *pspec,
5131                              EvView          *view)
5132 {
5133         EvDocument *document = ev_document_model_get_document (model);
5134
5135         view->loading = FALSE;
5136
5137         if (document != view->document) {
5138                 gint current_page;
5139
5140                 clear_caches (view);
5141
5142                 if (view->document) {
5143                         g_object_unref (view->document);
5144                 }
5145
5146                 view->document = document;
5147                 view->find_result = 0;
5148
5149                 if (view->document) {
5150                         g_object_ref (view->document);
5151                         setup_caches (view);
5152                 }
5153
5154                 current_page = ev_document_model_get_page (model);
5155                 if (view->current_page != current_page) {
5156                         ev_view_change_page (view, current_page, TRUE);
5157                 } else {
5158                         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
5159                         gtk_widget_queue_resize (GTK_WIDGET (view));
5160                 }
5161         }
5162 }
5163
5164 static void
5165 ev_view_rotation_changed_cb (EvDocumentModel *model,
5166                              GParamSpec      *pspec,
5167                              EvView          *view)
5168 {
5169         gint rotation = ev_document_model_get_rotation (model);
5170
5171         view->rotation = rotation;
5172
5173         if (view->pixbuf_cache) {
5174                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5175                 if (!ev_document_is_page_size_uniform (view->document))
5176                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5177                 gtk_widget_queue_resize (GTK_WIDGET (view));
5178         }
5179
5180         ev_view_remove_all (view);
5181
5182         if (rotation != 0)
5183                 clear_selection (view);
5184 }
5185
5186 static void
5187 ev_view_inverted_colors_changed_cb (EvDocumentModel *model,
5188                                     GParamSpec      *pspec,
5189                                     EvView          *view)
5190 {
5191         if (view->pixbuf_cache) {
5192                 gboolean inverted_colors;
5193
5194                 inverted_colors = ev_document_model_get_inverted_colors (model);
5195                 ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
5196                 gtk_widget_queue_draw (GTK_WIDGET (view));
5197         }
5198 }
5199
5200 static void
5201 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
5202                                 GParamSpec      *pspec,
5203                                 EvView          *view)
5204 {
5205         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
5206
5207         view->sizing_mode = mode;
5208         if (mode != EV_SIZING_FREE)
5209                 gtk_widget_queue_resize (GTK_WIDGET (view));
5210 }
5211
5212 #define EPSILON 0.0000001
5213 static void
5214 ev_view_scale_changed_cb (EvDocumentModel *model,
5215                           GParamSpec      *pspec,
5216                           EvView          *view)
5217 {
5218         gdouble scale = ev_document_model_get_scale (model);
5219
5220         if (ABS (view->scale - scale) < EPSILON)
5221                 return;
5222
5223         if (view->loading_text) {
5224                 cairo_surface_destroy (view->loading_text);
5225                 view->loading_text = NULL;
5226         }
5227
5228         view->scale = scale;
5229
5230         view->pending_resize = TRUE;
5231         if (view->sizing_mode == EV_SIZING_FREE)
5232                 gtk_widget_queue_resize (GTK_WIDGET (view));
5233 }
5234
5235 static void
5236 ev_view_continuous_changed_cb (EvDocumentModel *model,
5237                                GParamSpec      *pspec,
5238                                EvView          *view)
5239 {
5240         gboolean continuous = ev_document_model_get_continuous (model);
5241
5242         view->continuous = continuous;
5243         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5244         gtk_widget_queue_resize (GTK_WIDGET (view));
5245 }
5246
5247 static void
5248 ev_view_dual_page_changed_cb (EvDocumentModel *model,
5249                               GParamSpec      *pspec,
5250                               EvView          *view)
5251 {
5252         gboolean dual_page = ev_document_model_get_dual_page (model);
5253
5254         view->dual_page = dual_page;
5255         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5256         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5257          * preload_cache_size to be 2 if dual_page is set.
5258          */
5259         gtk_widget_queue_resize (GTK_WIDGET (view));
5260 }
5261
5262 static void
5263 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
5264                                GParamSpec      *pspec,
5265                                EvView          *view)
5266 {
5267         gboolean fullscreen = ev_document_model_get_fullscreen (model);
5268
5269         view->fullscreen = fullscreen;
5270         gtk_widget_queue_resize (GTK_WIDGET (view));
5271 }
5272
5273 void
5274 ev_view_set_model (EvView          *view,
5275                    EvDocumentModel *model)
5276 {
5277         g_return_if_fail (EV_IS_VIEW (view));
5278         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
5279
5280         if (model == view->model)
5281                 return;
5282
5283         if (view->model) {
5284                 g_signal_handlers_disconnect_by_func (view->model,
5285                                                       ev_view_document_changed_cb,
5286                                                       view);
5287                 g_signal_handlers_disconnect_by_func (view->model,
5288                                                       ev_view_page_changed_cb,
5289                                                       view);
5290                 g_object_unref (view->model);
5291         }
5292         view->model = g_object_ref (model);
5293         g_signal_connect (view->model, "notify::document",
5294                           G_CALLBACK (ev_view_document_changed_cb),
5295                           view);
5296         g_signal_connect (view->model, "notify::rotation",
5297                           G_CALLBACK (ev_view_rotation_changed_cb),
5298                           view);
5299         g_signal_connect (view->model, "notify::inverted-colors",
5300                           G_CALLBACK (ev_view_inverted_colors_changed_cb),
5301                           view);
5302         g_signal_connect (view->model, "notify::sizing-mode",
5303                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
5304                           view);
5305         g_signal_connect (view->model, "notify::scale",
5306                           G_CALLBACK (ev_view_scale_changed_cb),
5307                           view);
5308         g_signal_connect (view->model, "notify::continuous",
5309                           G_CALLBACK (ev_view_continuous_changed_cb),
5310                           view);
5311         g_signal_connect (view->model, "notify::dual-page",
5312                           G_CALLBACK (ev_view_dual_page_changed_cb),
5313                           view);
5314         g_signal_connect (view->model, "notify::fullscreen",
5315                           G_CALLBACK (ev_view_fullscreen_changed_cb),
5316                           view);
5317         g_signal_connect (view->model, "page-changed",
5318                           G_CALLBACK (ev_view_page_changed_cb),
5319                           view);
5320 }
5321
5322 static void
5323 ev_view_reload_page (EvView    *view,
5324                      gint       page,
5325                      GdkRegion *region)
5326 {
5327         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5328                                      region,
5329                                      page,
5330                                      view->rotation,
5331                                      view->scale);
5332 }
5333
5334 void
5335 ev_view_reload (EvView *view)
5336 {
5337         ev_pixbuf_cache_clear (view->pixbuf_cache);
5338         view_update_range_and_current_page (view);
5339 }
5340
5341 void
5342 ev_view_set_presentation (EvView   *view,
5343                           gboolean  presentation)
5344 {
5345         g_return_if_fail (EV_IS_VIEW (view));
5346
5347         presentation = presentation != FALSE;
5348
5349         if (view->presentation == presentation)
5350                 return;
5351
5352         if (!presentation)
5353                 view->presentation_state = EV_PRESENTATION_NORMAL;
5354
5355         view->presentation = presentation;
5356         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5357
5358         if (presentation) {
5359                 view->sizing_mode_saved = view->sizing_mode;
5360                 view->scale_saved = view->scale;
5361                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
5362         } else {
5363                 ev_document_model_set_sizing_mode (view->model, view->sizing_mode_saved);
5364                 ev_document_model_set_scale (view->model, view->scale_saved);
5365         }
5366
5367         gtk_widget_queue_resize (GTK_WIDGET (view));
5368
5369         if (presentation)
5370                 ev_view_presentation_transition_start (view);
5371         else {
5372                 ev_view_presentation_transition_stop (view);
5373
5374                 if (view->animation) {
5375                         /* stop any running animation */
5376                         ev_view_transition_animation_cancel (view->animation, view);
5377                 }
5378         }
5379
5380         if (GTK_WIDGET_REALIZED (view)) {
5381                 if (view->presentation)
5382                         gdk_window_set_background (view->layout.bin_window,
5383                                                    &GTK_WIDGET (view)->style->black);
5384                 else
5385                         gdk_window_set_background (view->layout.bin_window,
5386                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
5387         }
5388
5389         g_object_notify (G_OBJECT (view), "presentation");
5390 }
5391
5392 gboolean
5393 ev_view_get_presentation (EvView *view)
5394 {
5395         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5396
5397         return view->presentation;
5398 }
5399
5400 static gboolean
5401 transition_next_page (EvView *view)
5402 {
5403         ev_view_next_page (view);
5404
5405         return FALSE;
5406 }
5407
5408 static void
5409 ev_view_presentation_transition_stop (EvView *view)
5410 {
5411         if (view->trans_timeout_id > 0)
5412                 g_source_remove (view->trans_timeout_id);
5413         view->trans_timeout_id = 0;
5414 }
5415
5416 static void
5417 ev_view_presentation_transition_start (EvView *view)
5418 {
5419         gdouble duration;
5420
5421         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
5422                 return;
5423
5424         ev_view_presentation_transition_stop (view);
5425
5426         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
5427                                                              view->current_page);
5428         if (duration > 0) {
5429                 view->trans_timeout_id =
5430                         g_timeout_add_seconds (duration,
5431                                                (GSourceFunc) transition_next_page,
5432                                                view);
5433         }
5434 }
5435
5436 /*** Zoom and sizing mode ***/
5437
5438 gboolean
5439 ev_view_can_zoom_in (EvView *view)
5440 {
5441         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
5442 }
5443
5444 gboolean
5445 ev_view_can_zoom_out (EvView *view)
5446 {
5447         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
5448 }
5449
5450 void
5451 ev_view_zoom_in (EvView *view)
5452 {
5453         gdouble scale;
5454
5455         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5456
5457         if (view->presentation)
5458                 return;
5459
5460         view->pending_scroll = SCROLL_TO_CENTER;
5461         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
5462         ev_document_model_set_scale (view->model, scale);
5463 }
5464
5465 void
5466 ev_view_zoom_out (EvView *view)
5467 {
5468         gdouble scale;
5469
5470         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5471
5472         if (view->presentation)
5473                 return;
5474
5475         view->pending_scroll = SCROLL_TO_CENTER;
5476         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5477         ev_document_model_set_scale (view->model, scale);
5478 }
5479
5480 static double
5481 zoom_for_size_fit_width (gdouble doc_width,
5482                          gdouble doc_height,
5483                          int     target_width,
5484                          int     target_height)
5485 {
5486         return (double)target_width / doc_width;
5487 }
5488
5489 static double
5490 zoom_for_size_fit_height (gdouble doc_width,
5491                           gdouble doc_height,
5492                           int     target_width,
5493                           int     target_height)
5494 {
5495         return (double)target_height / doc_height;
5496 }
5497
5498 static double
5499 zoom_for_size_best_fit (gdouble doc_width,
5500                         gdouble doc_height,
5501                         int     target_width,
5502                         int     target_height)
5503 {
5504         double w_scale;
5505         double h_scale;
5506
5507         w_scale = (double)target_width / doc_width;
5508         h_scale = (double)target_height / doc_height;
5509
5510         return MIN (w_scale, h_scale);
5511 }
5512
5513
5514 static void
5515 ev_view_zoom_for_size_presentation (EvView *view,
5516                                     int     width,
5517                                     int     height)
5518 {
5519         gdouble doc_width, doc_height;
5520         gdouble scale;
5521
5522         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5523         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5524         ev_document_model_set_scale (view->model, scale);
5525 }
5526
5527 static void
5528 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5529                                                 int     width,
5530                                                 int     height)
5531 {
5532         gdouble doc_width, doc_height;
5533         GtkBorder border;
5534         gdouble scale;
5535
5536         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5537         if (view->rotation == 90 || view->rotation == 270) {
5538                 gdouble tmp;
5539
5540                 tmp = doc_width;
5541                 doc_width = doc_height;
5542                 doc_height = tmp;
5543         }
5544
5545         compute_border (view, doc_width, doc_height, &border);
5546
5547         doc_width *= 2;
5548         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5549         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5550
5551         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5552                 gint sb_size;
5553
5554                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5555                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5556         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5557                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5558         else
5559                 g_assert_not_reached ();
5560
5561         ev_document_model_set_scale (view->model, scale);
5562 }
5563
5564 static void
5565 ev_view_zoom_for_size_continuous (EvView *view,
5566                                   int     width,
5567                                   int     height)
5568 {
5569         gdouble doc_width, doc_height;
5570         GtkBorder border;
5571         gdouble scale;
5572
5573         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5574         if (view->rotation == 90 || view->rotation == 270) {
5575                 gdouble tmp;
5576
5577                 tmp = doc_width;
5578                 doc_width = doc_height;
5579                 doc_height = tmp;
5580         }
5581
5582         compute_border (view, doc_width, doc_height, &border);
5583
5584         width -= (border.left + border.right + 2 * view->spacing);
5585         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5586
5587         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5588                 gint sb_size;
5589
5590                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5591                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5592         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5593                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5594         else
5595                 g_assert_not_reached ();
5596
5597         ev_document_model_set_scale (view->model, scale);
5598 }
5599
5600 static void
5601 ev_view_zoom_for_size_dual_page (EvView *view,
5602                                  int     width,
5603                                  int     height)
5604 {
5605         GtkBorder border;
5606         gdouble doc_width, doc_height;
5607         gdouble scale;
5608         gint other_page;
5609
5610         other_page = view->current_page ^ 1;
5611
5612         /* Find the largest of the two. */
5613         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5614         if (other_page < ev_document_get_n_pages (view->document)) {
5615                 gdouble width_2, height_2;
5616
5617                 get_doc_page_size (view, other_page, &width_2, &height_2);
5618                 if (width_2 > doc_width)
5619                         doc_width = width_2;
5620                 if (height_2 > doc_height)
5621                         doc_height = height_2;
5622         }
5623         compute_border (view, width, height, &border);
5624
5625         doc_width = doc_width * 2;
5626         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5627         height -= (border.top + border.bottom + 2 * view->spacing);
5628
5629         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5630                 gint sb_size;
5631
5632                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5633                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5634         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5635                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5636         else
5637                 g_assert_not_reached ();
5638
5639         ev_document_model_set_scale (view->model, scale);
5640 }
5641
5642 static void
5643 ev_view_zoom_for_size_single_page (EvView *view,
5644                                    int     width,
5645                                    int     height)
5646 {
5647         gdouble doc_width, doc_height;
5648         GtkBorder border;
5649         gdouble scale;
5650
5651         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5652
5653         /* Get an approximate border */
5654         compute_border (view, width, height, &border);
5655
5656         width -= (border.left + border.right + 2 * view->spacing);
5657         height -= (border.top + border.bottom + 2 * view->spacing);
5658
5659         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5660                 gint sb_size;
5661
5662                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5663                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5664         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5665                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5666         else
5667                 g_assert_not_reached ();
5668
5669         ev_document_model_set_scale (view->model, scale);
5670 }
5671
5672 static void
5673 ev_view_zoom_for_size (EvView *view,
5674                        int     width,
5675                        int     height)
5676 {
5677         g_return_if_fail (EV_IS_VIEW (view));
5678         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5679                           view->sizing_mode == EV_SIZING_BEST_FIT);
5680         g_return_if_fail (width >= 0);
5681         g_return_if_fail (height >= 0);
5682
5683         if (view->document == NULL)
5684                 return;
5685
5686         if (view->presentation)
5687                 ev_view_zoom_for_size_presentation (view, width, height);
5688         else if (view->continuous && view->dual_page)
5689                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5690         else if (view->continuous)
5691                 ev_view_zoom_for_size_continuous (view, width, height);
5692         else if (view->dual_page)
5693                 ev_view_zoom_for_size_dual_page (view, width, height);
5694         else
5695                 ev_view_zoom_for_size_single_page (view, width, height);
5696 }
5697
5698 /*** Find ***/
5699 static gint
5700 ev_view_find_get_n_results (EvView *view, gint page)
5701 {
5702         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5703 }
5704
5705 static EvRectangle *
5706 ev_view_find_get_result (EvView *view, gint page, gint result)
5707 {
5708         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5709 }
5710
5711 static void
5712 jump_to_find_result (EvView *view)
5713 {
5714         gint n_results;
5715         gint page = view->current_page;
5716
5717         n_results = ev_view_find_get_n_results (view, page);
5718
5719         if (n_results > 0 && view->find_result < n_results) {
5720                 EvRectangle *rect;
5721                 GdkRectangle view_rect;
5722
5723                 rect = ev_view_find_get_result (view, page, view->find_result);
5724                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5725                 ensure_rectangle_is_visible (view, &view_rect);
5726                 view->jump_to_find_result = FALSE;
5727         }
5728 }
5729
5730 /**
5731  * jump_to_find_page
5732  * @view: #EvView instance
5733  * @direction: Direction to look
5734  * @shift: Shift from current page
5735  *
5736  * Jumps to the first page that has occurences of searched word.
5737  * Uses a direction where to look and a shift from current page.
5738  *
5739  */
5740 static void
5741 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5742 {
5743         int n_pages, i;
5744
5745         n_pages = ev_document_get_n_pages (view->document);
5746
5747         for (i = 0; i < n_pages; i++) {
5748                 int page;
5749
5750                 if (direction == EV_VIEW_FIND_NEXT)
5751                         page = view->current_page + i;
5752                 else
5753                         page = view->current_page - i;
5754                 page += shift;
5755
5756                 if (page >= n_pages) {
5757                         page = page - n_pages;
5758                 } else if (page < 0)
5759                         page = page + n_pages;
5760
5761                 if (ev_view_find_get_n_results (view, page) > 0) {
5762                         ev_document_model_set_page (view->model, page);
5763                         break;
5764                 }
5765         }
5766 }
5767
5768 void
5769 ev_view_find_changed (EvView *view, GList **results, gint page)
5770 {
5771         view->find_pages = results;
5772
5773         if (view->jump_to_find_result == TRUE) {
5774                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5775                 jump_to_find_result (view);
5776         }
5777
5778         if (view->current_page == page)
5779                 gtk_widget_queue_draw (GTK_WIDGET (view));
5780 }
5781
5782 void
5783 ev_view_find_next (EvView *view)
5784 {
5785         gint n_results;
5786
5787         n_results = ev_view_find_get_n_results (view, view->current_page);
5788         view->find_result++;
5789
5790         if (view->find_result >= n_results) {
5791                 view->find_result = 0;
5792                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5793                 jump_to_find_result (view);
5794         } else {
5795                 jump_to_find_result (view);
5796                 gtk_widget_queue_draw (GTK_WIDGET (view));
5797         }
5798 }
5799
5800 void
5801 ev_view_find_previous (EvView *view)
5802 {
5803         view->find_result--;
5804
5805         if (view->find_result < 0) {
5806                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5807                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5808                 jump_to_find_result (view);
5809         } else {
5810                 jump_to_find_result (view);
5811                 gtk_widget_queue_draw (GTK_WIDGET (view));
5812         }
5813 }
5814
5815 void
5816 ev_view_find_search_changed (EvView *view)
5817 {
5818         /* search string has changed, focus on new search result */
5819         view->jump_to_find_result = TRUE;
5820         view->find_pages = NULL;
5821 }
5822
5823 void
5824 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5825 {
5826         view->highlight_find_results = value;
5827         gtk_widget_queue_draw (GTK_WIDGET (view));
5828 }
5829
5830 void
5831 ev_view_find_cancel (EvView *view)
5832 {
5833         view->find_pages = NULL;
5834 }
5835
5836 /*** Selections ***/
5837
5838 /* compute_new_selection_rect/text calculates the area currently selected by
5839  * view_rect.  each handles a different mode;
5840  */
5841 static GList *
5842 compute_new_selection_rect (EvView       *view,
5843                             GdkPoint     *start,
5844                             GdkPoint     *stop)
5845 {
5846         GdkRectangle view_rect;
5847         int n_pages, i;
5848         GList *list = NULL;
5849
5850         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5851
5852         view_rect.x = MIN (start->x, stop->x);
5853         view_rect.y = MIN (start->y, stop->y);
5854         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5855         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5856
5857         n_pages = ev_document_get_n_pages (view->document);
5858
5859         for (i = 0; i < n_pages; i++) {
5860                 GdkRectangle page_area;
5861                 GtkBorder border;
5862
5863                 if (get_page_extents (view, i, &page_area, &border)) {
5864                         GdkRectangle overlap;
5865
5866                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5867                                 EvViewSelection *selection;
5868
5869                                 selection = g_new0 (EvViewSelection, 1);
5870                                 selection->page = i;
5871                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5872                                                        &(selection->rect));
5873
5874                                 list = g_list_append (list, selection);
5875                         }
5876                 }
5877         }
5878
5879         return list;
5880 }
5881
5882 static gboolean
5883 gdk_rectangle_point_in (GdkRectangle *rectangle,
5884                         GdkPoint     *point)
5885 {
5886         return rectangle->x <= point->x &&
5887                 rectangle->y <= point->y &&
5888                 point->x < rectangle->x + rectangle->width &&
5889                 point->y < rectangle->y + rectangle->height;
5890 }
5891
5892 static GList *
5893 compute_new_selection_text (EvView          *view,
5894                             EvSelectionStyle style,
5895                             GdkPoint        *start,
5896                             GdkPoint        *stop)
5897 {
5898         int n_pages, i, first, last;
5899         GList *list = NULL;
5900         EvViewSelection *selection;
5901         gdouble width, height;
5902         int start_page, end_page;
5903
5904         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5905
5906         n_pages = ev_document_get_n_pages (view->document);
5907
5908         /* First figure out the range of pages the selection
5909          * affects. */
5910         first = n_pages;
5911         last = 0;
5912         if (view->continuous) {
5913                 start_page = 0;
5914                 end_page = n_pages;
5915         } else if (view->dual_page) {
5916                 start_page = view->start_page;
5917                 end_page = view->end_page + 1;
5918         } else {
5919                 start_page = view->current_page;
5920                 end_page = view->current_page + 1;
5921         }
5922
5923         for (i = start_page; i < end_page; i++) {
5924                 GdkRectangle page_area;
5925                 GtkBorder border;
5926
5927                 get_page_extents (view, i, &page_area, &border);
5928                 if (gdk_rectangle_point_in (&page_area, start) ||
5929                     gdk_rectangle_point_in (&page_area, stop)) {
5930                         if (first == n_pages)
5931                                 first = i;
5932                         last = i;
5933                 }
5934
5935         }
5936
5937         /* Now create a list of EvViewSelection's for the affected
5938          * pages.  This could be an empty list, a list of just one
5939          * page or a number of pages.*/
5940         for (i = first; i < last + 1; i++) {
5941                 GdkRectangle page_area;
5942                 GtkBorder border;
5943                 GdkPoint *point;
5944
5945                 get_doc_page_size (view, i, &width, &height);
5946
5947                 selection = g_new0 (EvViewSelection, 1);
5948                 selection->page = i;
5949                 selection->style = style;
5950                 selection->rect.x1 = selection->rect.y1 = 0;
5951                 selection->rect.x2 = width;
5952                 selection->rect.y2 = height;
5953
5954                 get_page_extents (view, i, &page_area, &border);
5955
5956                 if (gdk_rectangle_point_in (&page_area, start))
5957                         point = start;
5958                 else
5959                         point = stop;
5960
5961                 if (i == first)
5962                         view_point_to_doc_point (view, point, &page_area,
5963                                                  &selection->rect.x1,
5964                                                  &selection->rect.y1);
5965
5966                 /* If the selection is contained within just one page,
5967                  * make sure we don't write 'start' into both points
5968                  * in selection->rect. */
5969                 if (first == last)
5970                         point = stop;
5971
5972                 if (i == last)
5973                         view_point_to_doc_point (view, point, &page_area,
5974                                                  &selection->rect.x2,
5975                                                  &selection->rect.y2);
5976
5977                 list = g_list_append (list, selection);
5978         }
5979
5980         return list;
5981 }
5982
5983 /* This function takes the newly calculated list, and figures out which regions
5984  * have changed.  It then queues a redraw approporiately.
5985  */
5986 static void
5987 merge_selection_region (EvView *view,
5988                         GList  *new_list)
5989 {
5990         GList *old_list;
5991         GList *new_list_ptr, *old_list_ptr;
5992
5993         /* Update the selection */
5994         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5995         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5996         g_list_free (view->selection_info.selections);
5997         view->selection_info.selections = new_list;
5998         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5999         g_object_notify (G_OBJECT (view), "has-selection");
6000
6001         new_list_ptr = new_list;
6002         old_list_ptr = old_list;
6003
6004         while (new_list_ptr || old_list_ptr) {
6005                 EvViewSelection *old_sel, *new_sel;
6006                 int cur_page;
6007                 GdkRegion *region = NULL;
6008
6009                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
6010                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
6011
6012                 /* Assume that the lists are in order, and we run through them
6013                  * comparing them, one page at a time.  We come out with the
6014                  * first page we see. */
6015                 if (new_sel && old_sel) {
6016                         if (new_sel->page < old_sel->page) {
6017                                 new_list_ptr = new_list_ptr->next;
6018                                 old_sel = NULL;
6019                         } else if (new_sel->page > old_sel->page) {
6020                                 old_list_ptr = old_list_ptr->next;
6021                                 new_sel = NULL;
6022                         } else {
6023                                 new_list_ptr = new_list_ptr->next;
6024                                 old_list_ptr = old_list_ptr->next;
6025                         }
6026                 } else if (new_sel) {
6027                         new_list_ptr = new_list_ptr->next;
6028                 } else if (old_sel) {
6029                         old_list_ptr = old_list_ptr->next;
6030                 }
6031
6032                 g_assert (new_sel || old_sel);
6033
6034                 /* is the page we're looking at on the screen?*/
6035                 cur_page = new_sel ? new_sel->page : old_sel->page;
6036                 if (cur_page < view->start_page || cur_page > view->end_page)
6037                         continue;
6038
6039                 /* seed the cache with a new page.  We are going to need the new
6040                  * region too. */
6041                 if (new_sel) {
6042                         GdkRegion *tmp_region = NULL;
6043
6044                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
6045                                                                cur_page,
6046                                                                view->scale,
6047                                                                &tmp_region);
6048
6049                         if (tmp_region) {
6050                                 new_sel->covered_region = gdk_region_copy (tmp_region);
6051                         }
6052                 }
6053
6054                 /* Now we figure out what needs redrawing */
6055                 if (old_sel && new_sel) {
6056                         if (old_sel->covered_region && new_sel->covered_region) {
6057                                 /* We only want to redraw the areas that have
6058                                  * changed, so we xor the old and new regions
6059                                  * and redraw if it's different */
6060                                 region = gdk_region_copy (old_sel->covered_region);
6061                                 gdk_region_xor (region, new_sel->covered_region);
6062                                 if (gdk_region_empty (region)) {
6063                                         gdk_region_destroy (region);
6064                                         region = NULL;
6065                                 }
6066                         } else if (old_sel->covered_region) {
6067                                 region = gdk_region_copy (old_sel->covered_region);
6068                         } else if (new_sel->covered_region) {
6069                                 region = gdk_region_copy (new_sel->covered_region);
6070                         }
6071                 } else if (old_sel && !new_sel) {
6072                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
6073                                 region = gdk_region_copy (old_sel->covered_region);
6074                         }
6075                 } else if (!old_sel && new_sel) {
6076                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
6077                                 region = gdk_region_copy (new_sel->covered_region);
6078                         }
6079                 } else {
6080                         g_assert_not_reached ();
6081                 }
6082
6083                 /* Redraw the damaged region! */
6084                 if (region) {
6085                         GdkRectangle page_area;
6086                         GtkBorder border;
6087
6088                         /* I don't know why but the region is smaller
6089                          * than expected. This hack fixes it, I guess
6090                          * 10 pixels more won't hurt
6091                          */
6092                         gdk_region_shrink (region, -5, -5);
6093
6094                         get_page_extents (view, cur_page, &page_area, &border);
6095                         gdk_region_offset (region,
6096                                            page_area.x + border.left - view->scroll_x,
6097                                            page_area.y + border.top - view->scroll_y);
6098                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
6099                         gdk_region_destroy (region);
6100                 }
6101         }
6102
6103         /* Free the old list, now that we're done with it. */
6104         g_list_foreach (old_list, (GFunc) selection_free, NULL);
6105         g_list_free (old_list);
6106 }
6107
6108 static void
6109 compute_selections (EvView          *view,
6110                     EvSelectionStyle style,
6111                     GdkPoint        *start,
6112                     GdkPoint        *stop)
6113 {
6114         GList *list;
6115
6116         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
6117                 list = compute_new_selection_rect (view, start, stop);
6118         else
6119                 list = compute_new_selection_text (view, style, start, stop);
6120         merge_selection_region (view, list);
6121 }
6122
6123 /* Free's the selection.  It's up to the caller to queue redraws if needed.
6124  */
6125 static void
6126 selection_free (EvViewSelection *selection)
6127 {
6128         if (selection->covered_region)
6129                 gdk_region_destroy (selection->covered_region);
6130         g_free (selection);
6131 }
6132
6133 static void
6134 clear_selection (EvView *view)
6135 {
6136         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6137         g_list_free (view->selection_info.selections);
6138         view->selection_info.selections = NULL;
6139         view->selection_info.in_selection = FALSE;
6140         if (view->pixbuf_cache)
6141                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6142         g_object_notify (G_OBJECT (view), "has-selection");
6143 }
6144
6145 void
6146 ev_view_select_all (EvView *view)
6147 {
6148         GList *selections = NULL;
6149         int n_pages, i;
6150
6151         /* Disable selection on rotated pages for the 0.4.0 series */
6152         if (view->rotation != 0)
6153                 return;
6154
6155         clear_selection (view);
6156
6157         n_pages = ev_document_get_n_pages (view->document);
6158         for (i = 0; i < n_pages; i++) {
6159                 gdouble width, height;
6160                 EvViewSelection *selection;
6161
6162                 get_doc_page_size (view, i, &width, &height);
6163
6164                 selection = g_new0 (EvViewSelection, 1);
6165                 selection->page = i;
6166                 selection->style = EV_SELECTION_STYLE_GLYPH;
6167                 selection->rect.x1 = selection->rect.y1 = 0;
6168                 selection->rect.x2 = width;
6169                 selection->rect.y2 = height;
6170
6171                 selections = g_list_append (selections, selection);
6172         }
6173
6174         merge_selection_region (view, selections);
6175         gtk_widget_queue_draw (GTK_WIDGET (view));
6176 }
6177
6178 gboolean
6179 ev_view_get_has_selection (EvView *view)
6180 {
6181         return view->selection_info.selections != NULL;
6182 }
6183
6184 static char *
6185 get_selected_text (EvView *view)
6186 {
6187         GString *text;
6188         GList *l;
6189         gchar *normalized_text;
6190         EvRenderContext *rc;
6191
6192         text = g_string_new (NULL);
6193         rc = ev_render_context_new (NULL, view->rotation, view->scale);
6194
6195         ev_document_doc_mutex_lock ();
6196
6197         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6198                 EvViewSelection *selection = (EvViewSelection *)l->data;
6199                 EvPage *page;
6200                 gchar *tmp;
6201
6202                 page = ev_document_get_page (view->document, selection->page);
6203                 ev_render_context_set_page (rc, page);
6204                 g_object_unref (page);
6205
6206                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6207                                                       rc, selection->style,
6208                                                       &(selection->rect));
6209
6210                 g_string_append (text, tmp);
6211                 g_free (tmp);
6212         }
6213
6214         g_object_unref (rc);
6215
6216         ev_document_doc_mutex_unlock ();
6217
6218         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6219         g_string_free (text, TRUE);
6220         return normalized_text;
6221 }
6222
6223 static void
6224 ev_view_clipboard_copy (EvView      *view,
6225                         const gchar *text)
6226 {
6227         GtkClipboard *clipboard;
6228
6229         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6230                                               GDK_SELECTION_CLIPBOARD);
6231         gtk_clipboard_set_text (clipboard, text, -1);
6232 }
6233
6234 void
6235 ev_view_copy (EvView *ev_view)
6236 {
6237         char *text;
6238
6239         if (!EV_IS_SELECTION (ev_view->document))
6240                 return;
6241
6242         text = get_selected_text (ev_view);
6243         ev_view_clipboard_copy (ev_view, text);
6244         g_free (text);
6245 }
6246
6247 static void
6248 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6249                         GtkSelectionData *selection_data,
6250                         guint             info,
6251                         gpointer          data)
6252 {
6253         EvView *ev_view = EV_VIEW (data);
6254
6255         if (ev_view->link_selected) {
6256                 gtk_selection_data_set_text (selection_data,
6257                                              ev_link_action_get_uri (ev_view->link_selected),
6258                                              -1);
6259         } else if (EV_IS_SELECTION (ev_view->document) &&
6260                    ev_view->selection_info.selections) {
6261                 gchar *text;
6262
6263                 text = get_selected_text (ev_view);
6264                 if (text) {
6265                         gtk_selection_data_set_text (selection_data, text, -1);
6266                         g_free (text);
6267                 }
6268         }
6269 }
6270
6271 static void
6272 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6273                           gpointer      data)
6274 {
6275         EvView *view = EV_VIEW (data);
6276
6277         clear_selection (view);
6278         clear_link_selected (view);
6279 }
6280
6281 static void
6282 ev_view_update_primary_selection (EvView *ev_view)
6283 {
6284         GtkClipboard *clipboard;
6285
6286         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6287                                               GDK_SELECTION_PRIMARY);
6288
6289         if (ev_view->selection_info.selections || ev_view->link_selected) {
6290                 GtkTargetList *target_list;
6291                 GtkTargetEntry *targets;
6292                 int n_targets;
6293
6294                 target_list = gtk_target_list_new (NULL, 0);
6295                 gtk_target_list_add_text_targets (target_list, 0);
6296                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6297                 gtk_target_list_unref (target_list);
6298
6299                 if (!gtk_clipboard_set_with_owner (clipboard,
6300                                                    targets, n_targets,
6301                                                    ev_view_primary_get_cb,
6302                                                    ev_view_primary_clear_cb,
6303                                                    G_OBJECT (ev_view)))
6304                         ev_view_primary_clear_cb (clipboard, ev_view);
6305
6306                 gtk_target_table_free (targets, n_targets);
6307         } else {
6308                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6309                         gtk_clipboard_clear (clipboard);
6310         }
6311 }
6312
6313 static void
6314 clear_link_selected (EvView *view)
6315 {
6316         if (view->link_selected) {
6317                 g_object_unref (view->link_selected);
6318                 view->link_selected = NULL;
6319         }
6320 }
6321
6322 void
6323 ev_view_copy_link_address (EvView       *view,
6324                            EvLinkAction *action)
6325 {
6326         clear_link_selected (view);
6327
6328         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6329
6330         view->link_selected = g_object_ref (action);
6331         ev_view_update_primary_selection (view);
6332 }
6333
6334 /*** Cursor operations ***/
6335
6336 static GdkCursor *
6337 ev_view_create_invisible_cursor(void)
6338 {
6339        GdkBitmap *empty;
6340        GdkColor black = { 0, 0, 0, 0 };
6341        static char bits[] = { 0x00 };
6342
6343        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
6344
6345        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
6346 }
6347
6348 static void
6349 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6350 {
6351         GdkCursor *cursor = NULL;
6352         GdkDisplay *display;
6353         GtkWidget *widget;
6354
6355         if (view->cursor == new_cursor) {
6356                 return;
6357         }
6358
6359         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6360         display = gtk_widget_get_display (widget);
6361         view->cursor = new_cursor;
6362
6363         switch (new_cursor) {
6364                 case EV_VIEW_CURSOR_NORMAL:
6365                         gdk_window_set_cursor (view->layout.bin_window, NULL);
6366                         break;
6367                 case EV_VIEW_CURSOR_IBEAM:
6368                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
6369                         break;
6370                 case EV_VIEW_CURSOR_LINK:
6371                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
6372                         break;
6373                 case EV_VIEW_CURSOR_WAIT:
6374                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
6375                         break;
6376                 case EV_VIEW_CURSOR_HIDDEN:
6377                         cursor = ev_view_create_invisible_cursor ();
6378                         break;
6379                 case EV_VIEW_CURSOR_DRAG:
6380                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
6381                         break;
6382                 case EV_VIEW_CURSOR_AUTOSCROLL:
6383                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
6384                         break;
6385         }
6386
6387         if (cursor) {
6388                 gdk_window_set_cursor (view->layout.bin_window, cursor);
6389                 gdk_cursor_unref (cursor);
6390                 gdk_flush();
6391         }
6392 }
6393
6394 void
6395 ev_view_hide_cursor (EvView *view)
6396 {
6397        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6398 }
6399
6400 void
6401 ev_view_show_cursor (EvView *view)
6402 {
6403        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6404 }
6405
6406 static void
6407 ev_view_reset_presentation_state (EvView *view)
6408 {
6409         if (!view->presentation ||
6410             view->presentation_state == EV_PRESENTATION_NORMAL)
6411                 return;
6412
6413         view->presentation_state = EV_PRESENTATION_NORMAL;
6414         gdk_window_set_background (view->layout.bin_window,
6415                                    &GTK_WIDGET (view)->style->black);
6416         gtk_widget_queue_draw (GTK_WIDGET (view));
6417 }
6418
6419 gboolean
6420 ev_view_next_page (EvView *view)
6421 {
6422         int page, n_pages;
6423
6424         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6425
6426         if (!view->document)
6427                 return FALSE;
6428
6429         if (view->presentation &&
6430             (view->presentation_state == EV_PRESENTATION_BLACK ||
6431              view->presentation_state == EV_PRESENTATION_WHITE)) {
6432                 ev_view_reset_presentation_state (view);
6433                 return FALSE;
6434         }
6435
6436         if (view->animation) {
6437                 ev_view_transition_animation_cancel (view->animation, view);
6438         }
6439
6440         ev_view_presentation_transition_stop (view);
6441         ev_view_reset_presentation_state (view);
6442
6443         page = ev_document_model_get_page (view->model);
6444         n_pages = ev_document_get_n_pages (view->document);
6445
6446         if (view->dual_page && !view->presentation)
6447                 page = page + 2;
6448         else
6449                 page = page + 1;
6450
6451         if (page < n_pages) {
6452                 ev_document_model_set_page (view->model, page);
6453                 return TRUE;
6454         } else if (view->presentation && page == n_pages) {
6455                 view->presentation_state = EV_PRESENTATION_END;
6456                 gtk_widget_queue_draw (GTK_WIDGET (view));
6457                 return TRUE;
6458         } else if (view->dual_page && page == n_pages) {
6459                 ev_document_model_set_page (view->model, page - 1);
6460                 return TRUE;
6461         } else {
6462                 return FALSE;
6463         }
6464 }
6465
6466 gboolean
6467 ev_view_previous_page (EvView *view)
6468 {
6469         int page;
6470
6471         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6472
6473         if (!view->document)
6474                 return FALSE;
6475
6476         if (view->presentation &&
6477             view->presentation_state == EV_PRESENTATION_END) {
6478                 ev_view_reset_presentation_state (view);
6479                 return TRUE;
6480         }
6481
6482         if (view->presentation &&
6483             (view->presentation_state == EV_PRESENTATION_BLACK ||
6484              view->presentation_state == EV_PRESENTATION_WHITE)) {
6485                 ev_view_reset_presentation_state (view);
6486                 return FALSE;
6487         }
6488
6489         if (view->animation) {
6490                 ev_view_transition_animation_cancel (view->animation, view);
6491         }
6492
6493         ev_view_reset_presentation_state (view);
6494
6495         page = ev_document_model_get_page (view->model);
6496
6497         if (view->dual_page && !view->presentation)
6498                 page = page - 2;
6499         else
6500                 page = page - 1;
6501
6502         if (page >= 0) {
6503                 ev_document_model_set_page (view->model, page);
6504                 return TRUE;
6505         } else if (view->dual_page && page == -1) {
6506                 ev_document_model_set_page (view->model, 0);
6507                 return TRUE;
6508         } else {
6509                 return FALSE;
6510         }
6511 }
6512