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