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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 (view->start_page == -1 || view->end_page == -1)
 696                 return;
 697
 698         if (start != view->start_page || end != view->end_page) {
 699                 gint i;
 700
 701                 for (i = start; i < view->start_page && start != -1; i++) {
 702                         hide_annotation_windows (view, i);
 703                 }
 704
 705                 for (i = end; i > view->end_page && end != -1; i--) {
 706                         hide_annotation_windows (view, i);
 707                 }
 708         }
 709
 710         ev_page_cache_set_page_range (view->page_cache,
 711                                       view->start_page,
 712                                       view->end_page);
 713         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 714                                         view->start_page,
 715                                         view->end_page,
 716                                         view->rotation,
 717                                         view->scale,
 718                                         view->selection_info.selections);
 719
 720         if (ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page))
 721             gtk_widget_queue_draw (GTK_WIDGET (view));
 722 }
 723
 724 static void
 725 set_scroll_adjustment (EvView *view,
 726                        GtkOrientation  orientation,
 727                        GtkAdjustment  *adjustment)
 728 {
 729         GtkAdjustment **to_set;
 730
 731         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 732                 to_set = &view->hadjustment;
 733         else
 734                 to_set = &view->vadjustment;
 735
 736         if (*to_set != adjustment) {
 737                 if (*to_set) {
 738                         g_signal_handlers_disconnect_by_func (*to_set,
 739                                                               (gpointer) on_adjustment_value_changed,
 740                                                               view);
 741                         g_object_unref (*to_set);
 742                 }
 743
 744                 *to_set = adjustment;
 745                 view_set_adjustment_values (view, orientation);
 746
 747                 if (*to_set) {
 748                         g_object_ref (*to_set);
 749                         g_signal_connect (*to_set, "value_changed",
 750                                           G_CALLBACK (on_adjustment_value_changed), view);
 751                 }
 752         }
 753 }
 754
 755 static void
 756 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 757                                 GtkAdjustment  *hadjustment,
 758                                 GtkAdjustment  *vadjustment)
 759 {
 760         EvView *view = EV_VIEW (layout);
 761
 762         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 763         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 764
 765         on_adjustment_value_changed (NULL, view);
 766 }
 767
 768 static void
 769 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 770                            guint           keyval,
 771                            GdkModifierType modifiers,
 772                            GtkScrollType   scroll,
 773                            gboolean        horizontal)
 774 {
 775   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 776
 777   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 778                                 "binding_activated", 2,
 779                                 GTK_TYPE_SCROLL_TYPE, scroll,
 780                                 G_TYPE_BOOLEAN, horizontal);
 781   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 782                                 "binding_activated", 2,
 783                                 GTK_TYPE_SCROLL_TYPE, scroll,
 784                                 G_TYPE_BOOLEAN, horizontal);
 785 }
 786
 787 static gdouble
 788 compute_scroll_increment (EvView        *view,
 789                           GtkScrollType  scroll)
 790 {
 791         GtkWidget *widget = GTK_WIDGET (view);
 792         GtkAdjustment *adjustment = view->vadjustment;
 793         GdkRegion *text_region, *region;
 794         gint page;
 795         GdkRectangle rect;
 796         EvRectangle doc_rect;
 797         GdkRectangle page_area;
 798         GtkBorder border;
 799         GdkRectangle *recs;
 800         gint n_recs;
 801         gdouble fraction = 1.0;
 802
 803         if (scroll != GTK_SCROLL_PAGE_BACKWARD && scroll != GTK_SCROLL_PAGE_FORWARD)
 804                 return adjustment->page_size;
 805
 806         page = scroll == GTK_SCROLL_PAGE_BACKWARD ? view->start_page : view->end_page;
 807
 808         text_region = ev_page_cache_get_text_mapping (view->page_cache, page);
 809         if (!text_region || gdk_region_empty (text_region))
 810                 return adjustment->page_size;
 811
 812         get_page_extents (view, page, &page_area, &border);
 813         rect.x = page_area.x + view->scroll_x;
 814         rect.y = view->scroll_y + (scroll == GTK_SCROLL_PAGE_BACKWARD ? 5 : widget->allocation.height - 5);
 815         rect.width = page_area.width;
 816         rect.height = 1;
 817         view_rect_to_doc_rect (view, &rect, &page_area, &doc_rect);
 818
 819         /* Convert the doc rectangle into a GdkRectangle */
 820         rect.x = doc_rect.x1;
 821         rect.y = doc_rect.y1;
 822         rect.width = doc_rect.x2 - doc_rect.x1;
 823         rect.height = MAX (1, doc_rect.y2 - doc_rect.y1);
 824         region = gdk_region_rectangle (&rect);
 825
 826         gdk_region_intersect (region, text_region);
 827         gdk_region_get_rectangles (region, &recs, &n_recs);
 828         gdk_region_destroy (region);
 829         if (n_recs > 0) {
 830                 EvRenderContext *rc;
 831                 EvPage  *ev_page;
 832
 833                 ev_page = ev_document_get_page (view->document, page);
 834                 rc = ev_render_context_new (ev_page, view->rotation, view->scale);
 835                 g_object_unref (ev_page);
 836                 /* Get the selection region to know the height of the line */
 837                 doc_rect.x1 = doc_rect.x2 = recs[0].x + 0.5;
 838                 doc_rect.y1 = doc_rect.y2 = recs[0].y + 0.5;
 839
 840                 ev_document_doc_mutex_lock ();
 841                 region = ev_selection_get_selection_region (EV_SELECTION (view->document),
 842                                                             rc, EV_SELECTION_STYLE_LINE,
 843                                                             &doc_rect);
 844                 ev_document_doc_mutex_unlock ();
 845
 846                 g_object_unref (rc);
 847                 g_free (recs);
 848                 gdk_region_get_rectangles (region, &recs, &n_recs);
 849                 gdk_region_destroy (region);
 850                 if (n_recs > 0) {
 851                         fraction = 1 - (recs[0].height / adjustment->page_size);
 852                 }
 853                 g_free (recs);
 854         }
 855
 856         return adjustment->page_size * fraction;
 857
 858 }
 859
 860 void
 861 ev_view_scroll (EvView        *view,
 862                 GtkScrollType  scroll,
 863                 gboolean       horizontal)
 864 {
 865         GtkAdjustment *adjustment;
 866         double value, increment;
 867         gboolean first_page = FALSE;
 868         gboolean last_page = FALSE;
 869
 870         view->jump_to_find_result = FALSE;
 871
 872         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
 873                 switch (scroll) {
 874                         case GTK_SCROLL_PAGE_BACKWARD:
 875                         case GTK_SCROLL_STEP_BACKWARD:
 876                                 ev_view_previous_page (view);
 877                                 break;
 878                         case GTK_SCROLL_PAGE_FORWARD:
 879                         case GTK_SCROLL_STEP_FORWARD:
 880                                 ev_view_next_page (view);
 881                                 break;
 882                         default:
 883                                 break;
 884                 }
 885                 return;
 886         }
 887
 888         /* Assign values for increment and vertical adjustment */
 889         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 890         value = adjustment->value;
 891
 892         /* Assign boolean for first and last page */
 893         if (view->current_page == 0)
 894                 first_page = TRUE;
 895         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 896                 last_page = TRUE;
 897
 898         switch (scroll) {
 899                 case GTK_SCROLL_PAGE_BACKWARD:
 900                         /* Do not jump backwards if at the first page */
 901                         if (value == (adjustment->lower) && first_page) {
 902                                 /* Do nothing */
 903                                 /* At the top of a page, assign the upper bound limit of previous page */
 904                         } else if (value == (adjustment->lower)) {
 905                                 value = adjustment->upper - adjustment->page_size;
 906                                 ev_view_previous_page (view);
 907                                 /* Jump to the top */
 908                         } else {
 909                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_BACKWARD);
 910                                 value = MAX (value - increment, adjustment->lower);
 911                         }
 912                         break;
 913                 case GTK_SCROLL_PAGE_FORWARD:
 914                         /* Do not jump forward if at the last page */
 915                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 916                                 /* Do nothing */
 917                         /* At the bottom of a page, assign the lower bound limit of next page */
 918                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 919                                 value = 0;
 920                                 ev_view_next_page (view);
 921                         /* Jump to the bottom */
 922                         } else {
 923                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_FORWARD);
 924                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 925                         }
 926                         break;
 927                 case GTK_SCROLL_STEP_BACKWARD:
 928                         value -= adjustment->step_increment;
 929                         break;
 930                 case GTK_SCROLL_STEP_FORWARD:
 931                         value += adjustment->step_increment;
 932                         break;
 933                 case GTK_SCROLL_STEP_DOWN:
 934                         value -= adjustment->step_increment / 10;
 935                         break;
 936                 case GTK_SCROLL_STEP_UP:
 937                         value += adjustment->step_increment / 10;
 938                         break;
 939                 default:
 940                         break;
 941         }
 942
 943         value = CLAMP (value, adjustment->lower,
 944                        adjustment->upper - adjustment->page_size);
 945
 946         gtk_adjustment_set_value (adjustment, value);
 947 }
 948
 949 #define MARGIN 5
 950
 951 static void
 952 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 953 {
 954         GtkWidget *widget = GTK_WIDGET (view);
 955         GtkAdjustment *adjustment;
 956         int value;
 957
 958         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 959
 960         adjustment = view->vadjustment;
 961
 962         if (rect->y < adjustment->value) {
 963                 value = MAX (adjustment->lower, rect->y - MARGIN);
 964                 gtk_adjustment_set_value (view->vadjustment, value);
 965         } else if (rect->y + rect->height >
 966                    adjustment->value + widget->allocation.height) {
 967                 value = MIN (adjustment->upper, rect->y + rect->height -
 968                              widget->allocation.height + MARGIN);
 969                 gtk_adjustment_set_value (view->vadjustment, value);
 970         }
 971
 972         adjustment = view->hadjustment;
 973
 974         if (rect->x < adjustment->value) {
 975                 value = MAX (adjustment->lower, rect->x - MARGIN);
 976                 gtk_adjustment_set_value (view->hadjustment, value);
 977         } else if (rect->x + rect->height >
 978                    adjustment->value + widget->allocation.width) {
 979                 value = MIN (adjustment->upper, rect->x + rect->width -
 980                              widget->allocation.width + MARGIN);
 981                 gtk_adjustment_set_value (view->hadjustment, value);
 982         }
 983
 984         gtk_widget_queue_resize (GTK_WIDGET (view));
 985 }
 986
 987 /*** Geometry computations ***/
 988
 989 static void
 990 compute_border (EvView *view, int width, int height, GtkBorder *border)
 991 {
 992         ev_document_misc_get_page_border_size (width, height, border);
 993 }
 994
 995 void
 996 _get_page_size_for_scale_and_rotation (EvDocument *document,
 997                                        gint        page,
 998                                        gdouble     scale,
 999                                        gint        rotation,
1000                                        gint       *page_width,
1001                                        gint       *page_height)
1002 {
1003         gdouble w, h;
1004         gint    width, height;
1005
1006         ev_document_get_page_size (document, page, &w, &h);
1007
1008         width = (gint)(w * scale + 0.5);
1009         height = (gint)(h * scale + 0.5);
1010
1011         if (page_width)
1012                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
1013         if (page_height)
1014                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
1015 }
1016
1017 static void
1018 ev_view_get_page_size (EvView *view,
1019                        gint    page,
1020                        gint   *page_width,
1021                        gint   *page_height)
1022 {
1023         _get_page_size_for_scale_and_rotation (view->document,
1024                                                page,
1025                                                view->scale,
1026                                                view->rotation,
1027                                                page_width,
1028                                                page_height);
1029 }
1030
1031 static void
1032 ev_view_get_max_page_size (EvView *view,
1033                            gint   *max_width,
1034                            gint   *max_height)
1035 {
1036         double w, h;
1037         gint   width, height;
1038
1039         ev_document_get_max_page_size (view->document, &w, &h);
1040
1041         width = (gint)(w * view->scale + 0.5);
1042         height = (gint)(h * view->scale + 0.5);
1043
1044         if (max_width)
1045                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
1046         if (max_height)
1047                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
1048 }
1049
1050 static void
1051 get_page_y_offset (EvView *view, int page, int *y_offset)
1052 {
1053         int max_width, offset;
1054         GtkBorder border;
1055
1056         g_return_if_fail (y_offset != NULL);
1057
1058         ev_view_get_max_page_size (view, &max_width, NULL);
1059         compute_border (view, max_width, max_width, &border);
1060
1061         if (view->dual_page) {
1062                 ev_view_get_height_to_page (view, page, NULL, &offset);
1063                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
1064                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
1065         } else {
1066                 ev_view_get_height_to_page (view, page, &offset, NULL);
1067                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
1068         }
1069
1070         *y_offset = offset;
1071         return;
1072 }
1073
1074 static gboolean
1075 get_page_extents (EvView       *view,
1076                   gint          page,
1077                   GdkRectangle *page_area,
1078                   GtkBorder    *border)
1079 {
1080         GtkWidget *widget;
1081         int width, height;
1082
1083         widget = GTK_WIDGET (view);
1084
1085         /* Get the size of the page */
1086         ev_view_get_page_size (view, page, &width, &height);
1087         compute_border (view, width, height, border);
1088         page_area->width = width + border->left + border->right;
1089         page_area->height = height + border->top + border->bottom;
1090
1091         if (view->continuous) {
1092                 gint max_width;
1093                 gint x, y;
1094
1095                 ev_view_get_max_page_size (view, &max_width, NULL);
1096                 max_width = max_width + border->left + border->right;
1097                 /* Get the location of the bounding box */
1098                 if (view->dual_page) {
1099                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1100                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1101                         if (page % 2 == get_dual_even_left (view))
1102                                 x = x + (max_width - width - border->left - border->right);
1103                 } else {
1104                         x = view->spacing;
1105                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
1106                 }
1107
1108                 get_page_y_offset (view, page, &y);
1109
1110                 page_area->x = x;
1111                 page_area->y = y;
1112         } else {
1113                 gint x, y;
1114                 if (view->dual_page) {
1115                         gint width_2, height_2;
1116                         gint max_width = width;
1117                         gint max_height = height;
1118                         GtkBorder overall_border;
1119                         gint other_page;
1120
1121                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1122
1123                         /* First, we get the bounding box of the two pages */
1124                         if (other_page < ev_document_get_n_pages (view->document)
1125                             && (0 <= other_page)) {
1126                                 ev_view_get_page_size (view, other_page,
1127                                                        &width_2, &height_2);
1128                                 if (width_2 > width)
1129                                         max_width = width_2;
1130                                 if (height_2 > height)
1131                                         max_height = height_2;
1132                         }
1133                         compute_border (view, max_width, max_height, &overall_border);
1134
1135                         /* Find the offsets */
1136                         x = view->spacing;
1137                         y = view->spacing;
1138
1139                         /* Adjust for being the left or right page */
1140                         if (page % 2 == get_dual_even_left (view))
1141                                 x = x + max_width - width;
1142                         else
1143                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1144
1145                         y = y + (max_height - height)/2;
1146
1147                         /* Adjust for extra allocation */
1148                         x = x + MAX (0, widget->allocation.width -
1149                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1150                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
1151                 } else {
1152                         x = view->spacing;
1153                         y = view->spacing;
1154
1155                         /* Adjust for extra allocation */
1156                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1157                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1158                 }
1159
1160                 page_area->x = x;
1161                 page_area->y = y;
1162         }
1163
1164         return TRUE;
1165 }
1166
1167 static void
1168 get_doc_page_size (EvView  *view,
1169                    gint     page,
1170                    gdouble *width,
1171                    gdouble *height)
1172 {
1173         double w, h;
1174
1175         ev_document_get_page_size (view->document, page, &w, &h);
1176         if (view->rotation == 0 || view->rotation == 180) {
1177                 if (width) *width = w;
1178                 if (height) *height = h;
1179         } else {
1180                 if (width) *width = h;
1181                 if (height) *height = w;
1182         }
1183 }
1184
1185 static void
1186 view_point_to_doc_point (EvView *view,
1187                          GdkPoint *view_point,
1188                          GdkRectangle *page_area,
1189                          double  *doc_point_x,
1190                          double  *doc_point_y)
1191 {
1192         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1193         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1194 }
1195
1196 static void
1197 view_rect_to_doc_rect (EvView *view,
1198                        GdkRectangle *view_rect,
1199                        GdkRectangle *page_area,
1200                        EvRectangle  *doc_rect)
1201 {
1202         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1203         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1204         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1205         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1206 }
1207
1208 static void
1209 doc_point_to_view_point (EvView       *view,
1210                          int           page,
1211                          EvPoint      *doc_point,
1212                          GdkPoint     *view_point)
1213 {
1214         GdkRectangle page_area;
1215         GtkBorder border;
1216         double x, y, view_x, view_y;
1217         gdouble width, height;
1218
1219         get_doc_page_size (view, page, &width, &height);
1220
1221         if (view->rotation == 0) {
1222                 x = doc_point->x;
1223                 y = doc_point->y;
1224         } else if (view->rotation == 90) {
1225                 x = width - doc_point->y;
1226                 y = doc_point->x;
1227         } else if (view->rotation == 180) {
1228                 x = width - doc_point->x;
1229                 y = height - doc_point->y;
1230         } else if (view->rotation == 270) {
1231                 x = doc_point->y;
1232                 y = height - doc_point->x;
1233         } else {
1234                 g_assert_not_reached ();
1235         }
1236
1237         get_page_extents (view, page, &page_area, &border);
1238
1239         view_x = CLAMP (x * view->scale, 0, page_area.width);
1240         view_y = CLAMP (y * view->scale, 0, page_area.height);
1241         view_point->x = view_x + page_area.x;
1242         view_point->y = view_y + page_area.y;
1243 }
1244
1245 static void
1246 doc_rect_to_view_rect (EvView       *view,
1247                        int           page,
1248                        EvRectangle  *doc_rect,
1249                        GdkRectangle *view_rect)
1250 {
1251         GdkRectangle page_area;
1252         GtkBorder border;
1253         double x, y, w, h;
1254         gdouble width, height;
1255
1256         get_doc_page_size (view, page, &width, &height);
1257
1258         if (view->rotation == 0) {
1259                 x = doc_rect->x1;
1260                 y = doc_rect->y1;
1261                 w = doc_rect->x2 - doc_rect->x1;
1262                 h = doc_rect->y2 - doc_rect->y1;
1263         } else if (view->rotation == 90) {
1264                 x = width - doc_rect->y2;
1265                 y = doc_rect->x1;
1266                 w = doc_rect->y2 - doc_rect->y1;
1267                 h = doc_rect->x2 - doc_rect->x1;
1268         } else if (view->rotation == 180) {
1269                 x = width - doc_rect->x2;
1270                 y = height - doc_rect->y2;
1271                 w = doc_rect->x2 - doc_rect->x1;
1272                 h = doc_rect->y2 - doc_rect->y1;
1273         } else if (view->rotation == 270) {
1274                 x = doc_rect->y1;
1275                 y = height - doc_rect->x2;
1276                 w = doc_rect->y2 - doc_rect->y1;
1277                 h = doc_rect->x2 - doc_rect->x1;
1278         } else {
1279                 g_assert_not_reached ();
1280         }
1281
1282         get_page_extents (view, page, &page_area, &border);
1283
1284         view_rect->x = x * view->scale + page_area.x;
1285         view_rect->y = y * view->scale + page_area.y;
1286         view_rect->width = w * view->scale;
1287         view_rect->height = h * view->scale;
1288 }
1289
1290 static gboolean
1291 get_dual_even_left (EvView *view)
1292 {
1293         return (ev_document_get_n_pages (view->document) > 2);
1294 }
1295
1296 static void
1297 find_page_at_location (EvView  *view,
1298                        gdouble  x,
1299                        gdouble  y,
1300                        gint    *page,
1301                        gint    *x_offset,
1302                        gint    *y_offset)
1303 {
1304         int i;
1305
1306         if (view->document == NULL)
1307                 return;
1308
1309         g_assert (page);
1310         g_assert (x_offset);
1311         g_assert (y_offset);
1312
1313         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1314                 GdkRectangle page_area;
1315                 GtkBorder border;
1316
1317                 if (! get_page_extents (view, i, &page_area, &border))
1318                         continue;
1319
1320                 if ((x >= page_area.x + border.left) &&
1321                     (x < page_area.x + page_area.width - border.right) &&
1322                     (y >= page_area.y + border.top) &&
1323                     (y < page_area.y + page_area.height - border.bottom)) {
1324                         *page = i;
1325                         *x_offset = x - (page_area.x + border.left);
1326                         *y_offset = y - (page_area.y + border.top);
1327                         return;
1328                 }
1329         }
1330
1331         *page = -1;
1332 }
1333
1334 static gboolean
1335 location_in_text (EvView  *view,
1336                   gdouble  x,
1337                   gdouble  y)
1338 {
1339         GdkRegion *region;
1340         gint page = -1;
1341         gint x_offset = 0, y_offset = 0;
1342
1343         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1344
1345         if (page == -1)
1346                 return FALSE;
1347
1348         region = ev_page_cache_get_text_mapping (view->page_cache, page);
1349
1350         if (region)
1351                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1352         else
1353                 return FALSE;
1354 }
1355
1356 static int
1357 ev_view_get_width (EvView *view)
1358 {
1359         return GTK_WIDGET (view)->allocation.width;
1360 }
1361
1362 static int
1363 ev_view_get_height (EvView *view)
1364 {
1365         return GTK_WIDGET (view)->allocation.height;
1366 }
1367
1368 static gboolean
1369 location_in_selected_text (EvView  *view,
1370                            gdouble  x,
1371                            gdouble  y)
1372 {
1373         gint page = -1;
1374         gint x_offset = 0, y_offset = 0;
1375         EvViewSelection *selection;
1376         GList *l = NULL;
1377
1378         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1379                 selection = (EvViewSelection *)l->data;
1380
1381                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1382
1383                 if (page != selection->page)
1384                         continue;
1385
1386                 if (selection->covered_region &&
1387                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1388                         return TRUE;
1389         }
1390
1391         return FALSE;
1392 }
1393
1394 static gboolean
1395 get_doc_point_from_offset (EvView *view,
1396                            gint    page,
1397                            gint    x_offset,
1398                            gint    y_offset,
1399                            gint   *x_new,
1400                            gint   *y_new)
1401 {
1402         gdouble width, height;
1403         double x, y;
1404
1405         get_doc_page_size (view, page, &width, &height);
1406
1407         x_offset = x_offset / view->scale;
1408         y_offset = y_offset / view->scale;
1409
1410         if (view->rotation == 0) {
1411                 x = x_offset;
1412                 y = y_offset;
1413         } else if (view->rotation == 90) {
1414                 x = y_offset;
1415                 y = width - x_offset;
1416         } else if (view->rotation == 180) {
1417                 x = width - x_offset;
1418                 y = height - y_offset;
1419         } else if (view->rotation == 270) {
1420                 x = height - y_offset;
1421                 y = x_offset;
1422         } else {
1423                 g_assert_not_reached ();
1424         }
1425
1426         *x_new = x;
1427         *y_new = y;
1428
1429         return TRUE;
1430 }
1431
1432 static gboolean
1433 get_doc_point_from_location (EvView  *view,
1434                              gdouble  x,
1435                              gdouble  y,
1436                              gint    *page,
1437                              gint    *x_new,
1438                              gint    *y_new)
1439 {
1440         gint x_offset = 0, y_offset = 0;
1441
1442         x += view->scroll_x;
1443         y += view->scroll_y;
1444         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1445         if (*page == -1)
1446                 return FALSE;
1447
1448         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1449 }
1450
1451 static void
1452 ev_view_get_area_from_mapping (EvView       *view,
1453                                guint         page,
1454                                GList        *mapping_list,
1455                                gconstpointer data,
1456                                GdkRectangle *area)
1457 {
1458         EvMapping *mapping;
1459
1460         mapping = ev_mapping_list_find (mapping_list, data);
1461         doc_rect_to_view_rect (view, page, &mapping->area, area);
1462         area->x -= view->scroll_x;
1463         area->y -= view->scroll_y;
1464 }
1465
1466
1467 /*** Hyperref ***/
1468 static EvLink *
1469 ev_view_get_link_at_location (EvView  *view,
1470                               gdouble  x,
1471                               gdouble  y)
1472 {
1473         gint page = -1;
1474         gint x_new = 0, y_new = 0;
1475         GList *link_mapping;
1476
1477         if (!EV_IS_DOCUMENT_LINKS (view->document))
1478                 return NULL;
1479
1480         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1481                 return NULL;
1482
1483         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
1484
1485         if (link_mapping)
1486                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1487         else
1488                 return NULL;
1489 }
1490
1491 static void
1492 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1493 {
1494         EvPoint doc_point;
1495         gdouble zoom, left, top;
1496         gboolean change_left, change_top;
1497
1498         left = ev_link_dest_get_left (dest, &change_left);
1499         top = ev_link_dest_get_top (dest, &change_top);
1500
1501         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1502                                        ev_link_dest_get_bottom (dest) - top,
1503                                        ev_view_get_width (view),
1504                                        ev_view_get_height (view));
1505
1506         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1507         ev_document_model_set_scale (view->model, zoom);
1508
1509         doc_point.x = change_left ? left : 0;
1510         doc_point.y = change_top ? top : 0;
1511         view->pending_point = doc_point;
1512
1513         ev_view_change_page (view, ev_link_dest_get_page (dest));
1514 }
1515
1516 static void
1517 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1518 {
1519         EvPoint doc_point;
1520         gdouble doc_width, doc_height;
1521         gint page;
1522         double zoom, left;
1523         gboolean change_left;
1524
1525         page = ev_link_dest_get_page (dest);
1526         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1527
1528         left = ev_link_dest_get_left (dest, &change_left);
1529         doc_point.x = change_left ? left : 0;
1530         doc_point.y = 0;
1531
1532         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1533                                          ev_view_get_width (view),
1534                                          ev_view_get_height (view));
1535
1536         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1537         ev_document_model_set_scale (view->model, zoom);
1538
1539         view->pending_point = doc_point;
1540
1541         ev_view_change_page (view, page);
1542 }
1543
1544 static void
1545 goto_fith_dest (EvView *view, EvLinkDest *dest)
1546 {
1547         EvPoint doc_point;
1548         gdouble doc_width, doc_height;
1549         gint page;
1550         gdouble zoom, top;
1551         gboolean change_top;
1552
1553         page = ev_link_dest_get_page (dest);
1554         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1555
1556         top = ev_link_dest_get_top (dest, &change_top);
1557
1558         doc_point.x = 0;
1559         doc_point.y = change_top ? top : 0;
1560
1561         zoom = zoom_for_size_fit_width (doc_width, top,
1562                                         ev_view_get_width (view),
1563                                         ev_view_get_height (view));
1564
1565         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1566         ev_document_model_set_scale (view->model, zoom);
1567
1568         view->pending_point = doc_point;
1569
1570         ev_view_change_page (view, page);
1571 }
1572
1573 static void
1574 goto_fit_dest (EvView *view, EvLinkDest *dest)
1575 {
1576         double zoom;
1577         gdouble doc_width, doc_height;
1578         int page;
1579
1580         page = ev_link_dest_get_page (dest);
1581         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1582
1583         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1584                                        ev_view_get_width (view),
1585                                        ev_view_get_height (view));
1586
1587         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1588         ev_document_model_set_scale (view->model, zoom);
1589
1590         ev_view_change_page (view, page);
1591 }
1592
1593 static void
1594 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1595 {
1596         EvPoint doc_point;
1597         gint page;
1598         gdouble zoom, left, top;
1599         gboolean change_zoom, change_left, change_top;
1600
1601         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1602         page = ev_link_dest_get_page (dest);
1603
1604         if (change_zoom && zoom > 1) {
1605                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1606                 ev_document_model_set_scale (view->model, zoom);
1607         }
1608
1609         left = ev_link_dest_get_left (dest, &change_left);
1610         top = ev_link_dest_get_top (dest, &change_top);
1611
1612         doc_point.x = change_left ? left : 0;
1613         doc_point.y = change_top ? top : 0;
1614         view->pending_point = doc_point;
1615
1616         ev_view_change_page (view, page);
1617 }
1618
1619 static void
1620 goto_dest (EvView *view, EvLinkDest *dest)
1621 {
1622         EvLinkDestType type;
1623         int page, n_pages, current_page;
1624
1625         page = ev_link_dest_get_page (dest);
1626         n_pages = ev_document_get_n_pages (view->document);
1627
1628         if (page < 0 || page >= n_pages)
1629                 return;
1630
1631         current_page = view->current_page;
1632
1633         type = ev_link_dest_get_dest_type (dest);
1634
1635         switch (type) {
1636                 case EV_LINK_DEST_TYPE_PAGE:
1637                         ev_document_model_set_page (view->model, page);
1638                         break;
1639                 case EV_LINK_DEST_TYPE_FIT:
1640                         goto_fit_dest (view, dest);
1641                         break;
1642                 case EV_LINK_DEST_TYPE_FITH:
1643                         goto_fith_dest (view, dest);
1644                         break;
1645                 case EV_LINK_DEST_TYPE_FITV:
1646                         goto_fitv_dest (view, dest);
1647                         break;
1648                 case EV_LINK_DEST_TYPE_FITR:
1649                         goto_fitr_dest (view, dest);
1650                         break;
1651                 case EV_LINK_DEST_TYPE_XYZ:
1652                         goto_xyz_dest (view, dest);
1653                         break;
1654                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1655                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1656                         break;
1657                 default:
1658                         g_assert_not_reached ();
1659         }
1660
1661         if (current_page != view->current_page)
1662                 ev_document_model_set_page (view->model, view->current_page);
1663 }
1664
1665 static void
1666 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1667 {
1668         EvLinkDestType type;
1669
1670         type = ev_link_dest_get_dest_type (dest);
1671
1672         if (type == EV_LINK_DEST_TYPE_NAMED) {
1673                 EvLinkDest  *dest2;
1674                 const gchar *named_dest;
1675
1676                 named_dest = ev_link_dest_get_named_dest (dest);
1677                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1678                                                           named_dest);
1679                 if (dest2) {
1680                         goto_dest (view, dest2);
1681                         g_object_unref (dest2);
1682                 }
1683
1684                 return;
1685         }
1686
1687         goto_dest (view, dest);
1688 }
1689
1690 void
1691 ev_view_handle_link (EvView *view, EvLink *link)
1692 {
1693         EvLinkAction    *action = NULL;
1694         EvLinkActionType type;
1695
1696         action = ev_link_get_action (link);
1697         if (!action)
1698                 return;
1699
1700         type = ev_link_action_get_action_type (action);
1701
1702         switch (type) {
1703                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1704                         EvLinkDest *dest;
1705
1706                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1707
1708                         dest = ev_link_action_get_dest (action);
1709                         ev_view_goto_dest (view, dest);
1710                 }
1711                         break;
1712                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1713                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1714                 case EV_LINK_ACTION_TYPE_LAUNCH:
1715                 case EV_LINK_ACTION_TYPE_NAMED:
1716                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1717                         break;
1718         }
1719 }
1720
1721 static char *
1722 tip_from_action_named (EvLinkAction *action)
1723 {
1724         const gchar *name = ev_link_action_get_name (action);
1725
1726         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1727                 return g_strdup (_("Go to first page"));
1728         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1729                 return g_strdup (_("Go to previous page"));
1730         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1731                 return g_strdup (_("Go to next page"));
1732         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1733                 return g_strdup (_("Go to last page"));
1734         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1735                 return g_strdup (_("Go to page"));
1736         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1737                 return g_strdup (_("Find"));
1738         }
1739
1740         return NULL;
1741 }
1742
1743 static char *
1744 tip_from_link (EvView *view, EvLink *link)
1745 {
1746         EvLinkAction *action;
1747         EvLinkActionType type;
1748         char *msg = NULL;
1749         char *page_label;
1750         const char *title;
1751
1752         action = ev_link_get_action (link);
1753         title = ev_link_get_title (link);
1754
1755         if (!action)
1756                 return title ? g_strdup (title) : NULL;
1757
1758         type = ev_link_action_get_action_type (action);
1759
1760         switch (type) {
1761                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1762                         page_label = ev_document_links_get_dest_page_label (EV_DOCUMENT_LINKS (view->document),
1763                                                                             ev_link_action_get_dest (action));
1764                         if (page_label) {
1765                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1766                                 g_free (page_label);
1767                         }
1768                         break;
1769                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1770                         if (title) {
1771                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1772                                                        ev_link_action_get_filename (action));
1773                         } else {
1774                                 msg = g_strdup_printf (_("Go to file “%s”"),
1775                                                        ev_link_action_get_filename (action));
1776                         }
1777                         break;
1778                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1779                         msg = g_strdup (ev_link_action_get_uri (action));
1780                         break;
1781                 case EV_LINK_ACTION_TYPE_LAUNCH:
1782                         msg = g_strdup_printf (_("Launch %s"),
1783                                                ev_link_action_get_filename (action));
1784                         break;
1785                 case EV_LINK_ACTION_TYPE_NAMED:
1786                         msg = tip_from_action_named (action);
1787                         break;
1788                 default:
1789                         if (title)
1790                                 msg = g_strdup (title);
1791                         break;
1792         }
1793
1794         return msg;
1795 }
1796
1797 static void
1798 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1799 {
1800         EvLink       *link;
1801         EvFormField  *field;
1802         EvAnnotation *annot = NULL;
1803
1804         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1805                 return;
1806
1807         if (view->drag_info.in_drag) {
1808                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1809                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1810                 return;
1811         }
1812
1813         if (view->scroll_info.autoscrolling) {
1814                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1815                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1816                 return;
1817         }
1818
1819         link = ev_view_get_link_at_location (view, x, y);
1820         if (link) {
1821                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1822         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1823                 if (field->is_read_only) {
1824                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1825                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1826                             view->cursor == EV_VIEW_CURSOR_DRAG)
1827                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1828                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1829                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1830                 } else {
1831                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1832                 }
1833         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1834                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1835         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1836                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1837         } else {
1838                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1839                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1840                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1841                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1842                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1843         }
1844
1845         if (link || annot)
1846                 g_object_set (view, "has-tooltip", TRUE, NULL);
1847 }
1848
1849 /*** Images ***/
1850 static EvImage *
1851 ev_view_get_image_at_location (EvView  *view,
1852                                gdouble  x,
1853                                gdouble  y)
1854 {
1855         gint page = -1;
1856         gint x_new = 0, y_new = 0;
1857         GList *image_mapping;
1858
1859         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1860                 return NULL;
1861
1862         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1863                 return NULL;
1864
1865         image_mapping = ev_page_cache_get_image_mapping (view->page_cache, page);
1866
1867         if (image_mapping)
1868                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1869         else
1870                 return NULL;
1871 }
1872
1873 /*** Forms ***/
1874 static EvFormField *
1875 ev_view_get_form_field_at_location (EvView  *view,
1876                                     gdouble  x,
1877                                     gdouble  y)
1878 {
1879         gint page = -1;
1880         gint x_new = 0, y_new = 0;
1881         GList *forms_mapping;
1882
1883         if (!EV_IS_DOCUMENT_FORMS (view->document))
1884                 return NULL;
1885
1886         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1887                 return NULL;
1888
1889         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache, page);
1890
1891         if (forms_mapping)
1892                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1893         else
1894                 return NULL;
1895 }
1896
1897 static GdkRegion *
1898 ev_view_form_field_get_region (EvView      *view,
1899                                EvFormField *field)
1900 {
1901         GdkRectangle view_area;
1902         GList       *forms_mapping;
1903
1904         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
1905                                                               field->page->index);
1906         ev_view_get_area_from_mapping (view, field->page->index,
1907                                        forms_mapping,
1908                                        field, &view_area);
1909
1910         return gdk_region_rectangle (&view_area);
1911 }
1912
1913 static gboolean
1914 ev_view_forms_remove_widgets (EvView *view)
1915 {
1916         ev_view_remove_all (view);
1917
1918         return FALSE;
1919 }
1920
1921 static void
1922 ev_view_form_field_destroy (GtkWidget *widget,
1923                             EvView    *view)
1924 {
1925         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1926 }
1927
1928 static GtkWidget *
1929 ev_view_form_field_button_create_widget (EvView      *view,
1930                                          EvFormField *field)
1931 {
1932         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1933         GdkRegion         *field_region = NULL;
1934
1935         switch (field_button->type) {
1936                 case EV_FORM_FIELD_BUTTON_PUSH:
1937                         return NULL;
1938                 case EV_FORM_FIELD_BUTTON_CHECK:
1939                 case EV_FORM_FIELD_BUTTON_RADIO: {
1940                         gboolean  state;
1941                         GList    *forms_mapping, *l;
1942
1943                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1944                                                                                field);
1945
1946                         /* FIXME: it actually depends on NoToggleToOff flags */
1947                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1948                             state && field_button->state)
1949                                 return NULL;
1950
1951                         field_region = ev_view_form_field_get_region (view, field);
1952
1953                         /* For radio buttons and checkbox buttons that are in a set
1954                          * we need to update also the region for the current selected item
1955                          */
1956                         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
1957                                                                               field->page->index);
1958                         for (l = forms_mapping; l; l = g_list_next (l)) {
1959                                 EvFormField *button = ((EvMapping *)(l->data))->data;
1960                                 GdkRegion   *button_region;
1961
1962                                 if (button->id == field->id)
1963                                         continue;
1964
1965                                 /* FIXME: only buttons in the same group should be updated */
1966                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1967                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1968                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1969                                         continue;
1970
1971                                 button_region = ev_view_form_field_get_region (view, button);
1972                                 gdk_region_union (field_region, button_region);
1973                                 gdk_region_destroy (button_region);
1974                         }
1975
1976                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
1977                                                                        field, !state);
1978                         field_button->state = !state;
1979                 }
1980                         break;
1981         }
1982
1983         ev_view_reload_page (view, field->page->index, field_region);
1984         gdk_region_destroy (field_region);
1985
1986         return NULL;
1987 }
1988
1989 static void
1990 ev_view_form_field_text_save (EvView    *view,
1991                               GtkWidget *widget)
1992 {
1993         EvFormField *field;
1994
1995         if (!view->document)
1996                 return;
1997
1998         field = g_object_get_data (G_OBJECT (widget), "form-field");
1999
2000         if (field->changed) {
2001                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2002                 GdkRegion       *field_region;
2003
2004                 field_region = ev_view_form_field_get_region (view, field);
2005
2006                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
2007                                                             field, field_text->text);
2008                 field->changed = FALSE;
2009                 ev_view_reload_page (view, field->page->index, field_region);
2010                 gdk_region_destroy (field_region);
2011         }
2012 }
2013
2014 static void
2015 ev_view_form_field_text_changed (GtkWidget   *widget,
2016                                  EvFormField *field)
2017 {
2018         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2019         gchar           *text = NULL;
2020
2021         if (GTK_IS_ENTRY (widget)) {
2022                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
2023         } else if (GTK_IS_TEXT_BUFFER (widget)) {
2024                 GtkTextIter start, end;
2025
2026                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
2027                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
2028                                                  &start, &end, FALSE);
2029         }
2030
2031         if (!field_text->text ||
2032             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
2033                 g_free (field_text->text);
2034                 field_text->text = text;
2035                 field->changed = TRUE;
2036         }
2037 }
2038
2039 static GtkWidget *
2040 ev_view_form_field_text_create_widget (EvView      *view,
2041                                        EvFormField *field)
2042 {
2043         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2044         GtkWidget       *text = NULL;
2045         gchar           *txt;
2046
2047         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2048                                                           field);
2049
2050         switch (field_text->type) {
2051                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2052                         /* TODO */
2053                 case EV_FORM_FIELD_TEXT_NORMAL:
2054                         text = gtk_entry_new ();
2055                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2056                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2057                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2058
2059                         if (txt) {
2060                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2061                                 g_free (txt);
2062                         }
2063
2064                         g_signal_connect (text, "changed",
2065                                           G_CALLBACK (ev_view_form_field_text_changed),
2066                                           field);
2067                         g_signal_connect_after (text, "activate",
2068                                                 G_CALLBACK (ev_view_form_field_destroy),
2069                                                 view);
2070                         break;
2071                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2072                         GtkTextBuffer *buffer;
2073
2074                         text = gtk_text_view_new ();
2075                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2076
2077                         if (txt) {
2078                                 gtk_text_buffer_set_text (buffer, txt, -1);
2079                                 g_free (txt);
2080                         }
2081
2082                         g_signal_connect (buffer, "changed",
2083                                           G_CALLBACK (ev_view_form_field_text_changed),
2084                                           field);
2085                 }
2086                         break;
2087         }
2088
2089         g_object_weak_ref (G_OBJECT (text),
2090                            (GWeakNotify)ev_view_form_field_text_save,
2091                            view);
2092
2093         return text;
2094 }
2095
2096 static void
2097 ev_view_form_field_choice_save (EvView    *view,
2098                                 GtkWidget *widget)
2099 {
2100         EvFormField *field;
2101
2102         if (!view->document)
2103                 return;
2104
2105         field = g_object_get_data (G_OBJECT (widget), "form-field");
2106
2107         if (field->changed) {
2108                 GList             *l;
2109                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2110                 GdkRegion         *field_region;
2111
2112                 field_region = ev_view_form_field_get_region (view, field);
2113
2114                 if (field_choice->is_editable) {
2115                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2116                                                                       field, field_choice->text);
2117                 } else {
2118                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2119                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2120                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2121                                                                                  field,
2122                                                                                  GPOINTER_TO_INT (l->data));
2123                         }
2124                 }
2125                 field->changed = FALSE;
2126                 ev_view_reload_page (view, field->page->index, field_region);
2127                 gdk_region_destroy (field_region);
2128         }
2129 }
2130
2131 static void
2132 ev_view_form_field_choice_changed (GtkWidget   *widget,
2133                                    EvFormField *field)
2134 {
2135         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2136
2137         if (GTK_IS_COMBO_BOX (widget)) {
2138                 gint item;
2139
2140                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2141                 if (!field_choice->selected_items ||
2142                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2143                         g_list_free (field_choice->selected_items);
2144                         field_choice->selected_items = NULL;
2145                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2146                                                                        GINT_TO_POINTER (item));
2147                         field->changed = TRUE;
2148                 }
2149
2150                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
2151                         gchar *text;
2152
2153                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
2154                         if (!field_choice->text ||
2155                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2156                                 g_free (field_choice->text);
2157                                 field_choice->text = text;
2158                                 field->changed = TRUE;
2159                         }
2160                 }
2161         } else if (GTK_IS_TREE_SELECTION (widget)) {
2162                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2163                 GtkTreeModel     *model;
2164                 GList            *items, *l;
2165
2166                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2167                 g_list_free (field_choice->selected_items);
2168                 field_choice->selected_items = NULL;
2169
2170                 for (l = items; l && l->data; l = g_list_next (l)) {
2171                         GtkTreeIter  iter;
2172                         GtkTreePath *path = (GtkTreePath *)l->data;
2173                         gint         item;
2174
2175                         gtk_tree_model_get_iter (model, &iter, path);
2176                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2177
2178                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2179                                                                        GINT_TO_POINTER (item));
2180
2181                         gtk_tree_path_free (path);
2182                 }
2183
2184                 g_list_free (items);
2185
2186                 field->changed = TRUE;
2187         }
2188 }
2189
2190 static GtkWidget *
2191 ev_view_form_field_choice_create_widget (EvView      *view,
2192                                          EvFormField *field)
2193 {
2194         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2195         GtkWidget         *choice;
2196         GtkTreeModel      *model;
2197         gint               n_items, i;
2198         gint               selected_item = 0;
2199
2200         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2201                                                                    field);
2202         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2203         for (i = 0; i < n_items; i++) {
2204                 GtkTreeIter iter;
2205                 gchar      *item;
2206
2207                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2208                                                                      field, i);
2209                 if (ev_document_forms_form_field_choice_is_item_selected (
2210                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2211                         selected_item = i;
2212                         /* FIXME: we need a get_selected_items function in poppler */
2213                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2214                                                                        GINT_TO_POINTER (i));
2215                 }
2216
2217                 if (item) {
2218                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2219                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2220                                             0, item,
2221                                             1, i,
2222                                             -1);
2223                         g_free (item);
2224                 }
2225         }
2226
2227         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2228                 GtkCellRenderer  *renderer;
2229                 GtkWidget        *tree_view;
2230                 GtkTreeSelection *selection;
2231
2232                 tree_view = gtk_tree_view_new_with_model (model);
2233                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2234
2235                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2236                 if (field_choice->multi_select) {
2237                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2238                 }
2239
2240                 /* TODO: set selected items */
2241
2242                 renderer = gtk_cell_renderer_text_new ();
2243                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2244                                                              0,
2245                                                              "choix", renderer,
2246                                                              "text", 0,
2247                                                              NULL);
2248
2249                 choice = gtk_scrolled_window_new (NULL, NULL);
2250                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2251                                                 GTK_POLICY_AUTOMATIC,
2252                                                 GTK_POLICY_AUTOMATIC);
2253                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2254                 gtk_widget_show (tree_view);
2255
2256                 g_signal_connect (selection, "changed",
2257                                   G_CALLBACK (ev_view_form_field_choice_changed),
2258                                   field);
2259                 g_signal_connect_after (selection, "changed",
2260                                         G_CALLBACK (ev_view_form_field_destroy),
2261                                         view);
2262         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2263                 gchar *text;
2264
2265                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2266                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2267                 if (text) {
2268                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2269                         g_free (text);
2270                 }
2271
2272                 g_signal_connect (choice, "changed",
2273                                   G_CALLBACK (ev_view_form_field_choice_changed),
2274                                   field);
2275                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
2276                                         G_CALLBACK (ev_view_form_field_destroy),
2277                                         view);
2278         } else { /* ComboBoxText */
2279                 GtkCellRenderer *renderer;
2280
2281                 choice = gtk_combo_box_new_with_model (model);
2282                 renderer = gtk_cell_renderer_text_new ();
2283                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2284                                             renderer, TRUE);
2285                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2286                                                 renderer,
2287                                                 "text", 0,
2288                                                 NULL);
2289                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2290                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2291
2292                 g_signal_connect (choice, "changed",
2293                                   G_CALLBACK (ev_view_form_field_choice_changed),
2294                                   field);
2295                 g_signal_connect_after (choice, "changed",
2296                                         G_CALLBACK (ev_view_form_field_destroy),
2297                                         view);
2298         }
2299
2300         g_object_unref (model);
2301
2302         g_object_weak_ref (G_OBJECT (choice),
2303                            (GWeakNotify)ev_view_form_field_choice_save,
2304                            view);
2305
2306         return choice;
2307 }
2308
2309 static void
2310 ev_view_handle_form_field (EvView      *view,
2311                            EvFormField *field,
2312                            gdouble      x,
2313                            gdouble      y)
2314 {
2315         GtkWidget   *field_widget = NULL;
2316         GList       *form_field_mapping;
2317         GdkRectangle view_area;
2318
2319         if (field->is_read_only)
2320                 return;
2321
2322         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2323                 field_widget = ev_view_form_field_button_create_widget (view, field);
2324         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2325                 field_widget = ev_view_form_field_text_create_widget (view, field);
2326         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2327                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2328         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2329                 /* TODO */
2330         }
2331
2332         /* Form field doesn't require a widget */
2333         if (!field_widget)
2334                 return;
2335
2336         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2337                                 g_object_ref (field),
2338                                 (GDestroyNotify)g_object_unref);
2339
2340         form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2341                                                                    field->page->index);
2342         ev_view_get_area_from_mapping (view, field->page->index,
2343                                        form_field_mapping,
2344                                        field, &view_area);
2345
2346         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2347         gtk_widget_show (field_widget);
2348         gtk_widget_grab_focus (field_widget);
2349 }
2350
2351 /* Annotations */
2352 static EvViewWindowChild *
2353 ev_view_get_window_child (EvView    *view,
2354                           GtkWidget *window)
2355 {
2356         GList *children = view->window_children;
2357
2358         while (children) {
2359                 EvViewWindowChild *child;
2360
2361                 child = (EvViewWindowChild *)children->data;
2362                 children = children->next;
2363
2364                 if (child->window == window)
2365                         return child;
2366         }
2367
2368         return NULL;
2369 }
2370
2371 static void
2372 ev_view_window_child_move (EvView            *view,
2373                            EvViewWindowChild *child,
2374                            gint               x,
2375                            gint               y)
2376 {
2377         child->x = x;
2378         child->y = y;
2379         gtk_window_move (GTK_WINDOW (child->window),
2380                          MAX (child->parent_x, x),
2381                          MAX (child->parent_y, y));
2382 }
2383
2384 static void
2385 ev_view_window_child_move_with_parent (EvView    *view,
2386                                        GtkWidget *window)
2387 {
2388         EvViewWindowChild *child;
2389         gint               root_x, root_y;
2390
2391         child = ev_view_get_window_child (view, window);
2392         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2393                                &root_x, &root_y);
2394         if (root_x != child->parent_x || root_y != child->parent_y) {
2395                 gint dest_x, dest_y;
2396
2397                 dest_x = child->x + (root_x - child->parent_x);
2398                 dest_y = child->y + (root_y - child->parent_y);
2399                 child->parent_x = root_x;
2400                 child->parent_y = root_y;
2401                 ev_view_window_child_move (view, child, dest_x, dest_y);
2402         }
2403
2404         if (child->visible && !gtk_widget_get_visible (window))
2405                 gtk_widget_show (window);
2406 }
2407
2408 static void
2409 ev_view_window_child_put (EvView    *view,
2410                           GtkWidget *window,
2411                           guint      page,
2412                           gint       x,
2413                           gint       y,
2414                           gdouble    orig_x,
2415                           gdouble    orig_y)
2416 {
2417         EvViewWindowChild *child;
2418         gint               root_x, root_y;
2419
2420         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2421                                &root_x, &root_y);
2422
2423         child = g_new0 (EvViewWindowChild, 1);
2424         child->window = window;
2425         child->page = page;
2426         child->orig_x = orig_x;
2427         child->orig_y = orig_y;
2428         child->parent_x = root_x;
2429         child->parent_y = root_y;
2430         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2431         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2432
2433         if (child->visible)
2434                 gtk_widget_show (window);
2435         else
2436                 gtk_widget_hide (window);
2437
2438         view->window_children = g_list_append (view->window_children, child);
2439 }
2440
2441 static EvViewWindowChild *
2442 ev_view_find_window_child_for_annot (EvView       *view,
2443                                      guint         page,
2444                                      EvAnnotation *annot)
2445 {
2446         GList *children = view->window_children;
2447
2448         while (children) {
2449                 EvViewWindowChild *child;
2450                 EvAnnotation      *wannot;
2451
2452                 child = (EvViewWindowChild *)children->data;
2453                 children = children->next;
2454
2455                 if (child->page != page)
2456                         continue;
2457
2458                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2459                 if (wannot == annot || strcmp (wannot->name, annot->name) == 0)
2460                         return child;
2461         }
2462
2463         return NULL;
2464 }
2465
2466 static void
2467 ev_view_window_children_free (EvView *view)
2468 {
2469         GList *l;
2470
2471         if (!view->window_children)
2472                 return;
2473
2474         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2475                 EvViewWindowChild *child;
2476
2477                 child = (EvViewWindowChild *)l->data;
2478                 gtk_widget_destroy (GTK_WIDGET (child->window));
2479                 g_free (child);
2480         }
2481         g_list_free (view->window_children);
2482         view->window_children = NULL;
2483         view->window_child_focus = NULL;
2484 }
2485
2486 static void
2487 annotation_window_grab_focus (GtkWidget *widget,
2488                               EvView    *view)
2489 {
2490         if (view->window_child_focus)
2491                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2492         view->window_child_focus = ev_view_get_window_child (view, widget);
2493 }
2494
2495 static void
2496 annotation_window_closed (EvAnnotationWindow *window,
2497                           EvView             *view)
2498 {
2499         EvViewWindowChild *child;
2500
2501         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2502         child->visible = FALSE;
2503 }
2504
2505 static void
2506 annotation_window_moved (EvAnnotationWindow *window,
2507                          gint                x,
2508                          gint                y,
2509                          EvView             *view)
2510 {
2511         EvViewWindowChild *child;
2512         GdkRectangle       page_area;
2513         GtkBorder          border;
2514         GdkRectangle       view_rect;
2515         EvRectangle        doc_rect;
2516         gint               width, height;
2517
2518         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2519         if (child->x == x && child->y == y)
2520                 return;
2521
2522         child->moved = TRUE;
2523         child->x = x;
2524         child->y = y;
2525
2526         /* Window has been moved by the user,
2527          * we have to set a new origin in doc coords
2528          */
2529         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2530         view_rect.x = (x - child->parent_x) + view->scroll_x;
2531         view_rect.y = (y - child->parent_y) + view->scroll_y;
2532         view_rect.width = width;
2533         view_rect.height = height;
2534
2535         get_page_extents (view, child->page, &page_area, &border);
2536         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2537         child->orig_x = doc_rect.x1;
2538         child->orig_y = doc_rect.y1;
2539 }
2540
2541 static void
2542 ev_view_annotation_save (EvView       *view,
2543                          EvAnnotation *annot)
2544 {
2545         if (!view->document)
2546                 return;
2547
2548         if (!annot->changed)
2549                 return;
2550
2551         ev_document_annotations_annotation_set_contents (EV_DOCUMENT_ANNOTATIONS (view->document),
2552                                                          annot, annot->contents);
2553         annot->changed = FALSE;
2554 }
2555
2556 static void
2557 show_annotation_windows (EvView *view,
2558                          gint    page)
2559 {
2560         GList     *annots, *l;
2561         GtkWindow *parent;
2562
2563         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2564
2565         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2566
2567         for (l = annots; l && l->data; l = g_list_next (l)) {
2568                 EvAnnotation      *annot;
2569                 EvViewWindowChild *child;
2570                 GtkWidget         *window;
2571                 EvRectangle       *doc_rect;
2572                 GdkRectangle       view_rect;
2573
2574                 annot = ((EvMapping *)(l->data))->data;
2575
2576                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2577                         continue;
2578
2579                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2580                         continue;
2581
2582                 window = g_object_get_data (G_OBJECT (annot), "popup");
2583                 if (window) {
2584                         ev_view_window_child_move_with_parent (view, window);
2585                         continue;
2586                 }
2587
2588                 /* Look if we already have a popup for this annot */
2589                 child = ev_view_find_window_child_for_annot (view, page, annot);
2590                 window = child ? child->window : NULL;
2591                 if (window) {
2592                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2593                         g_object_set_data (G_OBJECT (annot), "popup", window);
2594                         ev_view_window_child_move_with_parent (view, window);
2595                 } else {
2596                         window = ev_annotation_window_new (annot, parent);
2597                         g_signal_connect (window, "grab_focus",
2598                                           G_CALLBACK (annotation_window_grab_focus),
2599                                           view);
2600                         g_signal_connect (window, "closed",
2601                                           G_CALLBACK (annotation_window_closed),
2602                                           view);
2603                         g_signal_connect (window, "moved",
2604                                           G_CALLBACK (annotation_window_moved),
2605                                           view);
2606                         g_object_set_data (G_OBJECT (annot), "popup", window);
2607
2608                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2609                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2610                         view_rect.x -= view->scroll_x;
2611                         view_rect.y -= view->scroll_y;
2612
2613                         ev_view_window_child_put (view, window, page,
2614                                                   view_rect.x, view_rect.y,
2615                                                   doc_rect->x1, doc_rect->y1);
2616
2617                         g_object_weak_ref (G_OBJECT (annot),
2618                                            (GWeakNotify)ev_view_annotation_save,
2619                                            view);
2620                 }
2621         }
2622 }
2623
2624 static void
2625 hide_annotation_windows (EvView *view,
2626                          gint    page)
2627 {
2628         GList *annots, *l;
2629
2630         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2631
2632         for (l = annots; l && l->data; l = g_list_next (l)) {
2633                 EvAnnotation *annot;
2634                 GtkWidget    *window;
2635
2636                 annot = ((EvMapping *)(l->data))->data;
2637
2638                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2639                         continue;
2640
2641                 window = g_object_get_data (G_OBJECT (annot), "popup");
2642                 if (window)
2643                         gtk_widget_hide (window);
2644         }
2645 }
2646
2647 static EvAnnotation *
2648 ev_view_get_annotation_at_location (EvView  *view,
2649                                     gdouble  x,
2650                                     gdouble  y)
2651 {
2652         gint page = -1;
2653         gint x_new = 0, y_new = 0;
2654         GList *annotations_mapping;
2655
2656         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2657                 return NULL;
2658
2659         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2660                 return NULL;
2661
2662         annotations_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
2663
2664         if (annotations_mapping)
2665                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2666         else
2667                 return NULL;
2668 }
2669
2670 static void
2671 ev_view_handle_annotation (EvView       *view,
2672                            EvAnnotation *annot,
2673                            gdouble       x,
2674                            gdouble       y,
2675                            guint32       timestamp)
2676 {
2677         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2678                 GtkWidget *window;
2679
2680                 window = g_object_get_data (G_OBJECT (annot), "popup");
2681                 if (window) {
2682                         EvViewWindowChild *child;
2683
2684                         child = ev_view_get_window_child (view, window);
2685                         if (!child->visible) {
2686                                 child->visible = TRUE;
2687                                 ev_view_window_child_move (view, child, child->x, child->y);
2688                                 gtk_widget_show (window);
2689                         }
2690                 }
2691         }
2692
2693         if (EV_IS_ANNOTATION_ATTACHMENT (annot)) {
2694                 EvAttachment *attachment = EV_ANNOTATION_ATTACHMENT (annot)->attachment;
2695
2696                 if (attachment) {
2697                         GError *error = NULL;
2698
2699                         ev_attachment_open (attachment,
2700                                             gtk_widget_get_screen (GTK_WIDGET (view)),
2701                                             timestamp,
2702                                             &error);
2703
2704                         if (error) {
2705                                 g_warning ("%s", error->message);
2706                                 g_error_free (error);
2707                         }
2708                 }
2709         }
2710 }
2711
2712 /*** GtkWidget implementation ***/
2713
2714 static void
2715 ev_view_size_request_continuous_dual_page (EvView         *view,
2716                                            GtkRequisition *requisition)
2717 {
2718         gint n_pages;
2719
2720         n_pages = ev_document_get_n_pages (view->document) + 1;
2721         get_page_y_offset (view, n_pages, &requisition->height);
2722
2723         switch (view->sizing_mode) {
2724                 case EV_SIZING_FIT_WIDTH:
2725                 case EV_SIZING_BEST_FIT:
2726                         requisition->width = 1;
2727
2728                         break;
2729                 case EV_SIZING_FREE: {
2730                         gint max_width;
2731                         GtkBorder border;
2732
2733                         ev_view_get_max_page_size (view, &max_width, NULL);
2734                         compute_border (view, max_width, max_width, &border);
2735                         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2736                 }
2737                         break;
2738                 default:
2739                         g_assert_not_reached ();
2740         }
2741 }
2742
2743 static void
2744 ev_view_size_request_continuous (EvView         *view,
2745                                  GtkRequisition *requisition)
2746 {
2747         gint n_pages;
2748
2749         n_pages = ev_document_get_n_pages (view->document);
2750         get_page_y_offset (view, n_pages, &requisition->height);
2751
2752         switch (view->sizing_mode) {
2753                 case EV_SIZING_FIT_WIDTH:
2754                 case EV_SIZING_BEST_FIT:
2755                         requisition->width = 1;
2756
2757                         break;
2758                 case EV_SIZING_FREE: {
2759                         gint max_width;
2760                         GtkBorder border;
2761
2762                         ev_view_get_max_page_size (view, &max_width, NULL);
2763                         compute_border (view, max_width, max_width, &border);
2764                         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2765                 }
2766                         break;
2767                 default:
2768                         g_assert_not_reached ();
2769         }
2770 }
2771
2772 static void
2773 ev_view_size_request_dual_page (EvView         *view,
2774                                 GtkRequisition *requisition)
2775 {
2776         GtkBorder border;
2777         gint width, height;
2778
2779         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2780                 requisition->width = 1;
2781                 requisition->height = 1;
2782
2783                 return;
2784         }
2785
2786         /* Find the largest of the two. */
2787         ev_view_get_page_size (view,
2788                                view->current_page,
2789                                &width, &height);
2790         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
2791                 gint width_2, height_2;
2792                 ev_view_get_page_size (view,
2793                                        view->current_page + 1,
2794                                        &width_2, &height_2);
2795                 if (width_2 > width) {
2796                         width = width_2;
2797                         height = height_2;
2798                 }
2799         }
2800         compute_border (view, width, height, &border);
2801
2802         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
2803                 ((width + border.left + border.right) * 2) + (view->spacing * 3);
2804         requisition->height = (height + border.top + border.bottom) + (view->spacing * 2);
2805 }
2806
2807 static void
2808 ev_view_size_request_single_page (EvView         *view,
2809                                   GtkRequisition *requisition)
2810 {
2811         GtkBorder border;
2812         gint width, height;
2813
2814         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2815                 requisition->width = 1;
2816                 requisition->height = 1;
2817
2818                 return;
2819         }
2820
2821         ev_view_get_page_size (view, view->current_page, &width, &height);
2822         compute_border (view, width, height, &border);
2823
2824         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
2825                 width + border.left + border.right + (2 * view->spacing);
2826         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2827 }
2828
2829 static void
2830 ev_view_size_request (GtkWidget      *widget,
2831                       GtkRequisition *requisition)
2832 {
2833         EvView *view = EV_VIEW (widget);
2834
2835         if (view->document == NULL) {
2836                 requisition->width = 1;
2837                 requisition->height = 1;
2838                 return;
2839         }
2840
2841         if (view->continuous && view->dual_page)
2842                 ev_view_size_request_continuous_dual_page (view, requisition);
2843         else if (view->continuous)
2844                 ev_view_size_request_continuous (view, requisition);
2845         else if (view->dual_page)
2846                 ev_view_size_request_dual_page (view, requisition);
2847         else
2848                 ev_view_size_request_single_page (view, requisition);
2849 }
2850
2851 static void
2852 ev_view_size_allocate (GtkWidget      *widget,
2853                        GtkAllocation  *allocation)
2854 {
2855         EvView *view = EV_VIEW (widget);
2856         GList  *children, *l;
2857         gint    root_x, root_y;
2858
2859         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2860
2861         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2862             view->sizing_mode == EV_SIZING_BEST_FIT) {
2863                 ev_view_zoom_for_size (view,
2864                                        allocation->width,
2865                                        allocation->height);
2866                 ev_view_size_request (widget, &widget->requisition);
2867         }
2868
2869         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2870         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2871
2872         if (view->document)
2873                 view_update_range_and_current_page (view);
2874
2875         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2876         view->pending_resize = FALSE;
2877         view->pending_point.x = 0;
2878         view->pending_point.y = 0;
2879
2880         children = gtk_container_get_children (GTK_CONTAINER (widget));
2881         for (l = children; l && l->data; l = g_list_next (l)) {
2882                 EvFormField   *field;
2883                 GdkRectangle   view_area;
2884                 GList         *form_field_mapping;
2885                 GtkAllocation  child_allocation;
2886                 GtkRequisition child_requisition;
2887                 GtkWidget     *child = (GtkWidget *)l->data;
2888
2889                 field = g_object_get_data (G_OBJECT (child), "form-field");
2890                 if (!field)
2891                         continue;
2892
2893                 form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2894                                                                            field->page->index);
2895                 ev_view_get_area_from_mapping (view, field->page->index,
2896                                                form_field_mapping,
2897                                                field, &view_area);
2898
2899                 gtk_widget_size_request (child, &child_requisition);
2900                 if (child_requisition.width != view_area.width ||
2901                     child_requisition.height != view_area.height)
2902                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2903
2904                 gtk_container_child_get (GTK_CONTAINER (widget),
2905                                          child,
2906                                          "x", &child_allocation.x,
2907                                          "y", &child_allocation.y,
2908                                          NULL);
2909                 if (child_allocation.x != view_area.x ||
2910                     child_allocation.y != view_area.y) {
2911                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2912                 }
2913         }
2914         g_list_free (children);
2915
2916         if (view->window_children)
2917                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2918                                        &root_x, &root_y);
2919
2920         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2921                 EvViewWindowChild *child;
2922                 EvRectangle        doc_rect;
2923                 GdkRectangle       view_rect;
2924
2925                 child = (EvViewWindowChild *)l->data;
2926
2927                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
2928                 if (child->moved) {
2929                         doc_rect.x1 = child->orig_x;
2930                         doc_rect.y1 = child->orig_y;
2931                 }
2932                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
2933                 view_rect.x -= view->scroll_x;
2934                 view_rect.y -= view->scroll_y;
2935
2936                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
2937                         child->parent_x = root_x;
2938                         child->parent_y = root_y;
2939                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
2940                 }
2941         }
2942 }
2943
2944 static void
2945 ev_view_realize (GtkWidget *widget)
2946 {
2947         EvView *view = EV_VIEW (widget);
2948
2949         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
2950                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
2951
2952         gdk_window_set_events (view->layout.bin_window,
2953                                (gdk_window_get_events (view->layout.bin_window) |
2954                                 GDK_EXPOSURE_MASK |
2955                                 GDK_BUTTON_PRESS_MASK |
2956                                 GDK_BUTTON_RELEASE_MASK |
2957                                 GDK_SCROLL_MASK |
2958                                 GDK_KEY_PRESS_MASK |
2959                                 GDK_POINTER_MOTION_MASK |
2960                                 GDK_POINTER_MOTION_HINT_MASK |
2961                                 GDK_ENTER_NOTIFY_MASK |
2962                                 GDK_LEAVE_NOTIFY_MASK));
2963
2964         gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
2965
2966         on_adjustment_value_changed (NULL, view);
2967 }
2968
2969 static gboolean
2970 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
2971 {
2972         EvView *view = EV_VIEW (widget);
2973         guint state;
2974
2975         state = event->state & gtk_accelerator_get_default_mod_mask ();
2976
2977         if (state == GDK_CONTROL_MASK) {
2978                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
2979                 if (event->direction == GDK_SCROLL_UP ||
2980                     event->direction == GDK_SCROLL_LEFT) {
2981                         if (ev_view_can_zoom_in (view)) {
2982                                 ev_view_zoom_in (view);
2983                         }
2984                 } else {
2985                         if (ev_view_can_zoom_out (view)) {
2986                                 ev_view_zoom_out (view);
2987                         }
2988                 }
2989
2990                 return TRUE;
2991         }
2992
2993         view->jump_to_find_result = FALSE;
2994
2995         /* Shift+Wheel scrolls the in the perpendicular direction */
2996         if (state & GDK_SHIFT_MASK) {
2997                 if (event->direction == GDK_SCROLL_UP)
2998                         event->direction = GDK_SCROLL_LEFT;
2999                 else if (event->direction == GDK_SCROLL_LEFT)
3000                         event->direction = GDK_SCROLL_UP;
3001                 else if (event->direction == GDK_SCROLL_DOWN)
3002                         event->direction = GDK_SCROLL_RIGHT;
3003                 else if (event->direction == GDK_SCROLL_RIGHT)
3004                         event->direction = GDK_SCROLL_DOWN;
3005
3006                 event->state &= ~GDK_SHIFT_MASK;
3007                 state &= ~GDK_SHIFT_MASK;
3008         }
3009
3010         if (state == 0 && view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous) {
3011                 switch (event->direction) {
3012                         case GDK_SCROLL_DOWN:
3013                         case GDK_SCROLL_RIGHT:
3014                                 ev_view_next_page (view);
3015                                 break;
3016                         case GDK_SCROLL_UP:
3017                         case GDK_SCROLL_LEFT:
3018                                 ev_view_previous_page (view);
3019                                 break;
3020                 }
3021
3022                 return TRUE;
3023         }
3024
3025         return FALSE;
3026 }
3027
3028 static EvViewSelection *
3029 find_selection_for_page (EvView *view,
3030                          gint    page)
3031 {
3032         GList *list;
3033
3034         for (list = view->selection_info.selections; list != NULL; list = list->next) {
3035                 EvViewSelection *selection;
3036
3037                 selection = (EvViewSelection *) list->data;
3038
3039                 if (selection->page == page)
3040                         return selection;
3041         }
3042
3043         return NULL;
3044 }
3045
3046 static gboolean
3047 ev_view_expose_event (GtkWidget      *widget,
3048                       GdkEventExpose *event)
3049 {
3050         EvView  *view = EV_VIEW (widget);
3051         cairo_t *cr;
3052         gint     i;
3053
3054         if (view->loading) {
3055                 GdkRectangle area = {0};
3056
3057                 area.width = widget->allocation.width;
3058                 area.height = widget->allocation.height;
3059
3060                 draw_loading_text (view,
3061                                    &area,
3062                                    &(event->area));
3063         }
3064
3065         if (view->document == NULL)
3066                 return FALSE;
3067
3068         cr = gdk_cairo_create (view->layout.bin_window);
3069
3070         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3071                 GdkRectangle page_area;
3072                 GtkBorder border;
3073                 gboolean page_ready = TRUE;
3074
3075                 if (!get_page_extents (view, i, &page_area, &border))
3076                         continue;
3077
3078                 page_area.x -= view->scroll_x;
3079                 page_area.y -= view->scroll_y;
3080
3081                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
3082
3083                 if (page_ready && view->find_pages && view->highlight_find_results)
3084                         highlight_find_results (view, i);
3085                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3086                         show_annotation_windows (view, i);
3087         }
3088
3089         cairo_destroy (cr);
3090
3091         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3092                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3093
3094         return FALSE;
3095 }
3096
3097 static gboolean
3098 ev_view_do_popup_menu (EvView *view,
3099                        gdouble x,
3100                        gdouble y)
3101 {
3102         GList        *items = NULL;
3103         EvLink       *link;
3104         EvImage      *image;
3105         EvAnnotation *annot;
3106
3107         image = ev_view_get_image_at_location (view, x, y);
3108         if (image)
3109                 items = g_list_prepend (items, image);
3110
3111         link = ev_view_get_link_at_location (view, x, y);
3112         if (link)
3113                 items = g_list_prepend (items, link);
3114
3115         annot = ev_view_get_annotation_at_location (view, x, y);
3116         if (annot)
3117                 items = g_list_prepend (items, annot);
3118
3119         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, items);
3120
3121         g_list_free (items);
3122
3123         return TRUE;
3124 }
3125
3126 static gboolean
3127 ev_view_popup_menu (GtkWidget *widget)
3128 {
3129         gint x, y;
3130
3131         gtk_widget_get_pointer (widget, &x, &y);
3132         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3133 }
3134
3135 static void
3136 get_link_area (EvView       *view,
3137                gint          x,
3138                gint          y,
3139                EvLink       *link,
3140                GdkRectangle *area)
3141 {
3142         GList *link_mapping;
3143         gint   page;
3144         gint   x_offset = 0, y_offset = 0;
3145
3146         x += view->scroll_x;
3147         y += view->scroll_y;
3148
3149         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3150
3151         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
3152         ev_view_get_area_from_mapping (view, page,
3153                                        link_mapping,
3154                                        link, area);
3155 }
3156
3157 static void
3158 get_annot_area (EvView       *view,
3159                gint          x,
3160                gint          y,
3161                EvAnnotation *annot,
3162                GdkRectangle *area)
3163 {
3164         GList *annot_mapping;
3165         gint   page;
3166         gint   x_offset = 0, y_offset = 0;
3167
3168         x += view->scroll_x;
3169         y += view->scroll_y;
3170
3171         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3172
3173         annot_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
3174         ev_view_get_area_from_mapping (view, page,
3175                                        annot_mapping,
3176                                        annot, area);
3177 }
3178
3179 static gboolean
3180 ev_view_query_tooltip (GtkWidget  *widget,
3181                        gint        x,
3182                        gint        y,
3183                        gboolean    keyboard_tip,
3184                        GtkTooltip *tooltip)
3185 {
3186         EvView       *view = EV_VIEW (widget);
3187         EvLink       *link;
3188         EvAnnotation *annot;
3189         gchar        *text;
3190
3191         annot = ev_view_get_annotation_at_location (view, x, y);
3192         if (annot && annot->contents) {
3193                 GdkRectangle annot_area;
3194
3195                 get_annot_area (view, x, y, annot, &annot_area);
3196                 gtk_tooltip_set_text (tooltip, annot->contents);
3197                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
3198
3199                 return TRUE;
3200         }
3201
3202         link = ev_view_get_link_at_location (view, x, y);
3203         if (!link)
3204                 return FALSE;
3205
3206         text = tip_from_link (view, link);
3207         if (text && g_utf8_validate (text, -1, NULL)) {
3208                 GdkRectangle link_area;
3209
3210                 get_link_area (view, x, y, link, &link_area);
3211                 gtk_tooltip_set_text (tooltip, text);
3212                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3213         }
3214         g_free (text);
3215
3216         return TRUE;
3217 }
3218
3219 static void
3220 start_selection_for_event (EvView         *view,
3221                            GdkEventButton *event)
3222 {
3223         clear_selection (view);
3224
3225         view->selection_info.start.x = event->x + view->scroll_x;
3226         view->selection_info.start.y = event->y + view->scroll_y;
3227
3228         switch (event->type) {
3229                 case GDK_2BUTTON_PRESS:
3230                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3231                         break;
3232                 case GDK_3BUTTON_PRESS:
3233                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3234                         break;
3235                 default:
3236                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3237                         return;
3238         }
3239
3240         /* In case of WORD or LINE, compute selections now */
3241         compute_selections (view,
3242                             view->selection_info.style,
3243                             &(view->selection_info.start),
3244                             &(view->selection_info.start));
3245 }
3246
3247 static gboolean
3248 ev_view_button_press_event (GtkWidget      *widget,
3249                             GdkEventButton *event)
3250 {
3251         EvView *view = EV_VIEW (widget);
3252
3253         if (!view->document)
3254                 return FALSE;
3255
3256         if (!gtk_widget_has_focus (widget)) {
3257                 gtk_widget_grab_focus (widget);
3258         }
3259
3260         if (view->window_child_focus) {
3261                 EvAnnotationWindow *window;
3262                 EvAnnotation       *annot;
3263
3264                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3265                 annot = ev_annotation_window_get_annotation (window);
3266                 ev_annotation_window_ungrab_focus (window);
3267                 ev_view_annotation_save (view, annot);
3268                 view->window_child_focus = NULL;
3269         }
3270
3271         view->pressed_button = event->button;
3272         view->selection_info.in_drag = FALSE;
3273
3274         if (view->scroll_info.autoscrolling)
3275                 return TRUE;
3276
3277         switch (event->button) {
3278                 case 1: {
3279                         EvImage *image;
3280                         EvAnnotation *annot;
3281                         EvFormField *field;
3282
3283                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3284                                 if (event->type == GDK_3BUTTON_PRESS) {
3285                                         start_selection_for_event (view, event);
3286                                 } else if (location_in_selected_text (view,
3287                                                                event->x + view->scroll_x,
3288                                                                event->y + view->scroll_y)) {
3289                                         view->selection_info.in_drag = TRUE;
3290                                 } else {
3291                                         start_selection_for_event (view, event);
3292                                 }
3293
3294                                 gtk_widget_queue_draw (widget);
3295                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3296                                 ev_view_handle_annotation (view, annot, event->x, event->y, event->time);
3297                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3298                                 ev_view_remove_all (view);
3299                                 ev_view_handle_form_field (view, field, event->x, event->y);
3300                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3301                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3302                                 if (view->image_dnd_info.image)
3303                                         g_object_unref (view->image_dnd_info.image);
3304                                 view->image_dnd_info.image = g_object_ref (image);
3305                                 view->image_dnd_info.in_drag = TRUE;
3306
3307                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3308                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3309                         } else {
3310                                 ev_view_remove_all (view);
3311
3312                                 if (EV_IS_SELECTION (view->document))
3313                                         start_selection_for_event (view, event);
3314                         }
3315                 }
3316                         return TRUE;
3317                 case 2:
3318                         /* use root coordinates as reference point because
3319                          * scrolling changes window relative coordinates */
3320                         view->drag_info.start.x = event->x_root;
3321                         view->drag_info.start.y = event->y_root;
3322                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3323                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3324
3325                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3326
3327                         return TRUE;
3328                 case 3:
3329                         view->scroll_info.start_y = event->y;
3330                         return ev_view_do_popup_menu (view, event->x, event->y);
3331         }
3332
3333         return FALSE;
3334 }
3335
3336 static void
3337 ev_view_remove_all (EvView *view)
3338 {
3339         GList *children, *child;
3340
3341         children = gtk_container_get_children (GTK_CONTAINER (view));
3342         for (child = children; child && child->data; child = g_list_next (child)) {
3343                 gtk_container_remove (GTK_CONTAINER (view),
3344                                       GTK_WIDGET (child->data));
3345         }
3346         g_list_free (children);
3347 }
3348
3349 /*** Drag and Drop ***/
3350 static void
3351 ev_view_drag_data_get (GtkWidget        *widget,
3352                        GdkDragContext   *context,
3353                        GtkSelectionData *selection_data,
3354                        guint             info,
3355                        guint             time)
3356 {
3357         EvView *view = EV_VIEW (widget);
3358
3359         switch (info) {
3360                 case TARGET_DND_TEXT:
3361                         if (EV_IS_SELECTION (view->document) &&
3362                             view->selection_info.selections) {
3363                                 gchar *text;
3364
3365                                 text = get_selected_text (view);
3366                                 gtk_selection_data_set_text (selection_data,
3367                                                              text,
3368                                                              strlen (text));
3369                                 g_free (text);
3370                         }
3371                         break;
3372                 case TARGET_DND_IMAGE:
3373                         if (view->image_dnd_info.image) {
3374                                 GdkPixbuf *pixbuf;
3375
3376                                 ev_document_doc_mutex_lock ();
3377                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3378                                                                        view->image_dnd_info.image);
3379                                 ev_document_doc_mutex_unlock ();
3380
3381                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3382                                 g_object_unref (pixbuf);
3383                         }
3384                         break;
3385                 case TARGET_DND_URI:
3386                         if (view->image_dnd_info.image) {
3387                                 GdkPixbuf   *pixbuf;
3388                                 const gchar *tmp_uri;
3389                                 gchar       *uris[2];
3390
3391                                 ev_document_doc_mutex_lock ();
3392                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3393                                                                        view->image_dnd_info.image);
3394                                 ev_document_doc_mutex_unlock ();
3395
3396                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3397                                 g_object_unref (pixbuf);
3398
3399                                 uris[0] = (gchar *)tmp_uri;
3400                                 uris[1] = NULL;
3401                                 gtk_selection_data_set_uris (selection_data, uris);
3402                         }
3403         }
3404 }
3405
3406 static gboolean
3407 ev_view_drag_motion (GtkWidget      *widget,
3408                      GdkDragContext *context,
3409                      gint            x,
3410                      gint            y,
3411                      guint           time)
3412 {
3413         if (gtk_drag_get_source_widget (context) == widget)
3414                 gdk_drag_status (context, 0, time);
3415         else
3416                 gdk_drag_status (context, context->suggested_action, time);
3417
3418         return TRUE;
3419 }
3420
3421 static gboolean
3422 selection_update_idle_cb (EvView *view)
3423 {
3424         compute_selections (view,
3425                             view->selection_info.style,
3426                             &view->selection_info.start,
3427                             &view->motion);
3428         view->selection_update_id = 0;
3429         return FALSE;
3430 }
3431
3432 static gboolean
3433 selection_scroll_timeout_cb (EvView *view)
3434 {
3435         gint x, y, shift = 0;
3436         GtkWidget *widget = GTK_WIDGET (view);
3437
3438         gtk_widget_get_pointer (widget, &x, &y);
3439
3440         if (y > widget->allocation.height) {
3441                 shift = (y - widget->allocation.height) / 2;
3442         } else if (y < 0) {
3443                 shift = y / 2;
3444         }
3445
3446         if (shift)
3447                 gtk_adjustment_set_value (view->vadjustment,
3448                                           CLAMP (view->vadjustment->value + shift,
3449                                           view->vadjustment->lower,
3450                                           view->vadjustment->upper -
3451                                           view->vadjustment->page_size));
3452
3453         if (x > widget->allocation.width) {
3454                 shift = (x - widget->allocation.width) / 2;
3455         } else if (x < 0) {
3456                 shift = x / 2;
3457         }
3458
3459         if (shift)
3460                 gtk_adjustment_set_value (view->hadjustment,
3461                                           CLAMP (view->hadjustment->value + shift,
3462                                           view->hadjustment->lower,
3463                                           view->hadjustment->upper -
3464                                           view->hadjustment->page_size));
3465
3466         return TRUE;
3467 }
3468
3469 static gboolean
3470 ev_view_drag_update_momentum (EvView *view)
3471 {
3472         int i;
3473         if (!view->drag_info.in_drag)
3474                 return FALSE;
3475
3476         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3477                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3478                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3479         }
3480
3481         /* Momentum is a moving average of 10ms granularity over
3482          * the last 100ms with each 10ms stored in buffer.
3483          */
3484
3485         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3486         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3487
3488         return TRUE;
3489 }
3490
3491 static gboolean
3492 ev_view_scroll_drag_release (EvView *view)
3493 {
3494         gdouble dhadj_value, dvadj_value;
3495         gdouble oldhadjustment, oldvadjustment;
3496
3497         view->drag_info.momentum.x /= 1.2;
3498         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3499
3500         dhadj_value = view->hadjustment->page_size *
3501                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
3502         dvadj_value = view->vadjustment->page_size *
3503                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
3504
3505         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3506         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3507
3508      /* When we reach the edges, we need either to absorb some momentum and bounce by
3509       * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3510      if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
3511            ((oldhadjustment + dhadj_value) < 0))
3512                 view->drag_info.momentum.x = 0;
3513         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
3514            ((oldvadjustment + dvadj_value) < 0))
3515                 view->drag_info.momentum.y = 0;
3516
3517         gtk_adjustment_set_value (view->hadjustment,
3518                                 MIN (oldhadjustment + dhadj_value,
3519                                 view->hadjustment->upper - view->hadjustment->page_size));
3520         gtk_adjustment_set_value (view->vadjustment,
3521                                 MIN (oldvadjustment + dvadj_value,
3522                                 view->vadjustment->upper - view->vadjustment->page_size));
3523
3524         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3525            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3526                 return FALSE;
3527         else
3528                 return TRUE;
3529 }
3530
3531 static gboolean
3532 ev_view_motion_notify_event (GtkWidget      *widget,
3533                              GdkEventMotion *event)
3534 {
3535         EvView *view = EV_VIEW (widget);
3536         gint x, y;
3537
3538         if (!view->document)
3539                 return FALSE;
3540
3541         if (event->is_hint || event->window != view->layout.bin_window) {
3542             gtk_widget_get_pointer (widget, &x, &y);
3543         } else {
3544             x = event->x;
3545             y = event->y;
3546         }
3547
3548         if (view->scroll_info.autoscrolling) {
3549                 view->scroll_info.last_y = y;
3550                 return TRUE;
3551         }
3552
3553         if (view->selection_info.in_drag) {
3554                 if (gtk_drag_check_threshold (widget,
3555                                               view->selection_info.start.x,
3556                                               view->selection_info.start.y,
3557                                               x, y)) {
3558                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3559
3560                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3561
3562                         gtk_drag_begin (widget, target_list,
3563                                         GDK_ACTION_COPY,
3564                                         1, (GdkEvent *)event);
3565
3566                         view->selection_info.in_drag = FALSE;
3567
3568                         gtk_target_list_unref (target_list);
3569
3570                         return TRUE;
3571                 }
3572         } else if (view->image_dnd_info.in_drag) {
3573                 if (gtk_drag_check_threshold (widget,
3574                                               view->selection_info.start.x,
3575                                               view->selection_info.start.y,
3576                                               x, y)) {
3577                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3578
3579                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3580                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3581
3582                         gtk_drag_begin (widget, target_list,
3583                                         GDK_ACTION_COPY,
3584                                         1, (GdkEvent *)event);
3585
3586                         view->image_dnd_info.in_drag = FALSE;
3587
3588                         gtk_target_list_unref (target_list);
3589
3590                         return TRUE;
3591                 }
3592         }
3593
3594         switch (view->pressed_button) {
3595         case 1:
3596                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3597                  * documents only.
3598                  */
3599                 if (view->rotation != 0)
3600                         return FALSE;
3601
3602                 /* Schedule timeout to scroll during selection and additionally
3603                  * scroll once to allow arbitrary speed. */
3604                 if (!view->selection_scroll_id)
3605                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3606                                                                (GSourceFunc)selection_scroll_timeout_cb,
3607                                                                view);
3608                 else
3609                     selection_scroll_timeout_cb (view);
3610
3611                 view->selection_info.in_selection = TRUE;
3612                 view->motion.x = x + view->scroll_x;
3613                 view->motion.y = y + view->scroll_y;
3614
3615                 /* Queue an idle to handle the motion.  We do this because
3616                  * handling any selection events in the motion could be slower
3617                  * than new motion events reach us.  We always put it in the
3618                  * idle to make sure we catch up and don't visibly lag the
3619                  * mouse. */
3620                 if (!view->selection_update_id)
3621                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3622
3623                 return TRUE;
3624         case 2:
3625                 if (!view->drag_info.in_drag) {
3626                         gboolean start;
3627                         int i;
3628
3629                         start = gtk_drag_check_threshold (widget,
3630                                                           view->drag_info.start.x,
3631                                                           view->drag_info.start.y,
3632                                                           event->x_root,
3633                                                           event->y_root);
3634                         view->drag_info.in_drag = start;
3635                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3636                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3637                         /* Set 100 to choose how long it takes to build up momentum */
3638                         /* Clear out previous momentum info: */
3639                         for (i = 0; i < DRAG_HISTORY; i++) {
3640                                 view->drag_info.buffer[i].x = event->x;
3641                                 view->drag_info.buffer[i].y = event->y;
3642                         }
3643                         view->drag_info.momentum.x = 0;
3644                         view->drag_info.momentum.y = 0;
3645                 }
3646
3647                 if (view->drag_info.in_drag) {
3648                         int dx, dy;
3649                         gdouble dhadj_value, dvadj_value;
3650
3651                         view->drag_info.buffer[0].x = event->x;
3652                         view->drag_info.buffer[0].y = event->y;
3653
3654                         dx = event->x_root - view->drag_info.start.x;
3655                         dy = event->y_root - view->drag_info.start.y;
3656
3657                         dhadj_value = view->hadjustment->page_size *
3658                                       (gdouble)dx / widget->allocation.width;
3659                         dvadj_value = view->vadjustment->page_size *
3660                                       (gdouble)dy / widget->allocation.height;
3661
3662                         /* clamp scrolling to visible area */
3663                         gtk_adjustment_set_value (view->hadjustment,
3664                                                   MIN(view->drag_info.hadj - dhadj_value,
3665                                                       view->hadjustment->upper -
3666                                                       view->hadjustment->page_size));
3667                         gtk_adjustment_set_value (view->vadjustment,
3668                                                   MIN(view->drag_info.vadj - dvadj_value,
3669                                                       view->vadjustment->upper -
3670                                                       view->vadjustment->page_size));
3671
3672                         return TRUE;
3673                 }
3674
3675                 break;
3676         default:
3677                 ev_view_handle_cursor_over_xy (view, x, y);
3678         }
3679
3680         return FALSE;
3681 }
3682
3683 static gboolean
3684 ev_view_button_release_event (GtkWidget      *widget,
3685                               GdkEventButton *event)
3686 {
3687         EvView *view = EV_VIEW (widget);
3688         EvLink *link = NULL;
3689
3690         view->image_dnd_info.in_drag = FALSE;
3691
3692         if (view->scroll_info.autoscrolling) {
3693                 ev_view_autoscroll_stop (view);
3694                 view->pressed_button = -1;
3695
3696                 return TRUE;
3697         }
3698
3699         if (view->drag_info.in_drag) {
3700                 view->drag_info.release_timeout_id =
3701                         g_timeout_add (20,
3702                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3703         }
3704
3705         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3706                 link = ev_view_get_link_at_location (view, event->x, event->y);
3707         }
3708
3709         view->drag_info.in_drag = FALSE;
3710
3711         if (view->pressed_button == 2) {
3712                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3713         }
3714
3715         view->pressed_button = -1;
3716
3717         if (view->selection_scroll_id) {
3718             g_source_remove (view->selection_scroll_id);
3719             view->selection_scroll_id = 0;
3720         }
3721         if (view->selection_update_id) {
3722             g_source_remove (view->selection_update_id);
3723             view->selection_update_id = 0;
3724         }
3725
3726         if (view->selection_info.selections) {
3727                 clear_link_selected (view);
3728                 ev_view_update_primary_selection (view);
3729
3730                 if (view->selection_info.in_drag) {
3731                         clear_selection (view);
3732                         gtk_widget_queue_draw (widget);
3733                 }
3734
3735                 view->selection_info.in_drag = FALSE;
3736         } else if (link) {
3737                 if (event->button == 2) {
3738                         EvLinkAction    *action;
3739                         EvLinkActionType type;
3740
3741                         action = ev_link_get_action (link);
3742                         if (!action)
3743                                 return FALSE;
3744
3745                         type = ev_link_action_get_action_type (action);
3746                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3747                                 g_signal_emit (view,
3748                                                signals[SIGNAL_EXTERNAL_LINK],
3749                                                0, action);
3750                         }
3751                 } else {
3752                         ev_view_handle_link (view, link);
3753                 }
3754         }
3755
3756         return FALSE;
3757 }
3758
3759 static gboolean
3760 ev_view_key_press_event (GtkWidget   *widget,
3761                          GdkEventKey *event)
3762 {
3763         EvView *view = EV_VIEW (widget);
3764
3765         if (!view->document)
3766                 return FALSE;
3767
3768         if (!gtk_widget_has_focus (widget)) {
3769                 /* Forward key events to current focused window child */
3770                 if (view->window_child_focus) {
3771                         GdkEventKey *new_event;
3772                         gboolean     handled;
3773
3774                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
3775                         g_object_unref (new_event->window);
3776                         new_event->window = g_object_ref (view->window_child_focus->window->window);
3777                         gtk_widget_realize (view->window_child_focus->window);
3778                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
3779                         gdk_event_free ((GdkEvent *)new_event);
3780
3781                         return handled;
3782                 }
3783
3784                 return FALSE;
3785         }
3786
3787         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
3788 }
3789
3790 static gint
3791 ev_view_focus_in (GtkWidget     *widget,
3792                   GdkEventFocus *event)
3793 {
3794         if (EV_VIEW (widget)->pixbuf_cache)
3795                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3796         gtk_widget_queue_draw (widget);
3797
3798         return FALSE;
3799 }
3800
3801 static gint
3802 ev_view_focus_out (GtkWidget     *widget,
3803                    GdkEventFocus *event)
3804 {
3805         if (EV_VIEW (widget)->pixbuf_cache)
3806                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3807         gtk_widget_queue_draw (widget);
3808
3809         return FALSE;
3810 }
3811
3812 static gboolean
3813 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3814 {
3815         EvView *view = EV_VIEW (widget);
3816
3817         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
3818                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3819
3820         return FALSE;
3821 }
3822
3823 static gboolean
3824 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
3825 {
3826         EvView *view = EV_VIEW (widget);
3827
3828         ev_view_handle_cursor_over_xy (view, event->x, event->y);
3829
3830         return FALSE;
3831 }
3832
3833 static void
3834 ev_view_style_set (GtkWidget *widget,
3835                    GtkStyle  *old_style)
3836 {
3837         if (EV_VIEW (widget)->pixbuf_cache)
3838                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
3839
3840         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
3841 }
3842
3843 /*** Drawing ***/
3844
3845 static guint32
3846 ev_gdk_color_to_rgb (const GdkColor *color)
3847 {
3848   guint32 result;
3849   result = (0xff0000 | (color->red & 0xff00));
3850   result <<= 8;
3851   result |= ((color->green & 0xff00) | (color->blue >> 8));
3852   return result;
3853 }
3854
3855 static void
3856 draw_rubberband (GtkWidget *widget, GdkWindow *window,
3857                  const GdkRectangle *rect, guchar alpha)
3858 {
3859         GdkGC *gc;
3860         GdkPixbuf *pixbuf;
3861         GdkColor *fill_color_gdk;
3862         guint fill_color;
3863
3864         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
3865         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
3866
3867         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
3868                                  rect->width, rect->height);
3869         gdk_pixbuf_fill (pixbuf, fill_color);
3870
3871         gdk_draw_pixbuf (window, NULL, pixbuf,
3872                          0, 0,
3873                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3874                          rect->width, rect->height,
3875                          GDK_RGB_DITHER_NONE,
3876                          0, 0);
3877
3878         g_object_unref (pixbuf);
3879
3880         gc = gdk_gc_new (window);
3881         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
3882         gdk_draw_rectangle (window, gc, FALSE,
3883                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
3884                             rect->width - 1,
3885                             rect->height - 1);
3886         g_object_unref (gc);
3887
3888         gdk_color_free (fill_color_gdk);
3889 }
3890
3891
3892 static void
3893 highlight_find_results (EvView *view, int page)
3894 {
3895         gint i, n_results = 0;
3896
3897         n_results = ev_view_find_get_n_results (view, page);
3898
3899         for (i = 0; i < n_results; i++) {
3900                 EvRectangle *rectangle;
3901                 GdkRectangle view_rectangle;
3902                 guchar alpha;
3903
3904                 if (i == view->find_result && page == view->current_page) {
3905                         alpha = 0x90;
3906                 } else {
3907                         alpha = 0x20;
3908                 }
3909
3910                 rectangle = ev_view_find_get_result (view, page, i);
3911                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
3912                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
3913                                  &view_rectangle, alpha);
3914         }
3915 }
3916
3917 static void
3918 draw_loading_text (EvView       *view,
3919                    GdkRectangle *page_area,
3920                    GdkRectangle *expose_area)
3921 {
3922         cairo_t *cr;
3923         gint     width, height;
3924
3925         if (!view->loading_text) {
3926                 const gchar *loading_text = _("Loading…");
3927                 PangoLayout *layout;
3928                 PangoFontDescription *font_desc;
3929                 PangoRectangle logical_rect;
3930                 gint target_width;
3931                 gdouble real_scale;
3932
3933                 ev_document_fc_mutex_lock ();
3934
3935                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
3936
3937                 font_desc = pango_font_description_new ();
3938
3939                 /* We set the font to be 10 points, get the size, and scale appropriately */
3940                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
3941                 pango_layout_set_font_description (layout, font_desc);
3942                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
3943
3944                 target_width = MAX (page_area->width / 2, 1);
3945                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
3946                 pango_font_description_set_size (font_desc, (int)real_scale);
3947                 pango_layout_set_font_description (layout, font_desc);
3948                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
3949
3950                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
3951                                                                  logical_rect.width,
3952                                                                  logical_rect.height);
3953                 cr = cairo_create (view->loading_text);
3954                 cairo_set_source_rgb (cr,
3955                                       155 / (double)255,
3956                                       155 / (double)255,
3957                                       155 / (double)255);
3958                 pango_cairo_show_layout (cr, layout);
3959                 cairo_destroy (cr);
3960
3961                 pango_font_description_free (font_desc);
3962                 g_object_unref (layout);
3963
3964                 ev_document_fc_mutex_unlock ();
3965         }
3966
3967         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
3968         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
3969
3970         cr = gdk_cairo_create (view->layout.bin_window);
3971         cairo_translate (cr,
3972                          page_area->x + width,
3973                          page_area->y + height);
3974         cairo_set_source_surface (cr, view->loading_text, 0, 0);
3975         cairo_paint (cr);
3976         cairo_destroy (cr);
3977 }
3978
3979 static void
3980 draw_one_page (EvView       *view,
3981                gint          page,
3982                cairo_t      *cr,
3983                GdkRectangle *page_area,
3984                GtkBorder    *border,
3985                GdkRectangle *expose_area,
3986                gboolean     *page_ready)
3987 {
3988         GdkRectangle overlap;
3989         GdkRectangle real_page_area;
3990         gint         current_page;
3991
3992         g_assert (view->document);
3993
3994         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
3995                 return;
3996
3997         /* Render the document itself */
3998         real_page_area = *page_area;
3999
4000         real_page_area.x += border->left;
4001         real_page_area.y += border->top;
4002         real_page_area.width -= (border->left + border->right);
4003         real_page_area.height -= (border->top + border->bottom);
4004         *page_ready = TRUE;
4005
4006         current_page = ev_document_model_get_page (view->model);
4007         ev_document_misc_paint_one_page (view->layout.bin_window,
4008                                          GTK_WIDGET (view),
4009                                          page_area, border,
4010                                          page == current_page);
4011
4012         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4013                 gint             width, height;
4014                 gint             page_width, page_height;
4015                 cairo_surface_t *page_surface = NULL;
4016                 gint             selection_width, selection_height;
4017                 cairo_surface_t *selection_surface = NULL;
4018
4019                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4020
4021                 if (!page_surface) {
4022                         draw_loading_text (view,
4023                                            &real_page_area,
4024                                            expose_area);
4025
4026                         *page_ready = FALSE;
4027
4028                         return;
4029                 }
4030
4031                 ev_view_get_page_size (view, page, &width, &height);
4032
4033                 page_width = cairo_image_surface_get_width (page_surface);
4034                 page_height = cairo_image_surface_get_height (page_surface);
4035
4036                 cairo_save (cr);
4037                 cairo_translate (cr, overlap.x, overlap.y);
4038
4039                 if (width != page_width || height != page_height) {
4040                         cairo_pattern_set_filter (cairo_get_source (cr),
4041                                                   CAIRO_FILTER_FAST);
4042                         cairo_scale (cr,
4043                                      (gdouble)width / page_width,
4044                                      (gdouble)height / page_height);
4045                 }
4046
4047                 cairo_surface_set_device_offset (page_surface,
4048                                                  overlap.x - real_page_area.x,
4049                                                  overlap.y - real_page_area.y);
4050                 cairo_set_source_surface (cr, page_surface, 0, 0);
4051                 cairo_paint (cr);
4052                 cairo_restore (cr);
4053
4054                 /* Get the selection pixbuf iff we have something to draw */
4055                 if (find_selection_for_page (view, page) &&
4056                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4057                         selection_surface =
4058                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4059                                                                        page,
4060                                                                        view->scale,
4061                                                                        NULL);
4062                 }
4063
4064                 if (!selection_surface) {
4065                         return;
4066                 }
4067
4068                 selection_width = cairo_image_surface_get_width (selection_surface);
4069                 selection_height = cairo_image_surface_get_height (selection_surface);
4070
4071                 cairo_save (cr);
4072                 cairo_translate (cr, overlap.x, overlap.y);
4073
4074                 if (width != selection_width || height != selection_height) {
4075                         cairo_pattern_set_filter (cairo_get_source (cr),
4076                                                   CAIRO_FILTER_FAST);
4077                         cairo_scale (cr,
4078                                      (gdouble)width / selection_width,
4079                                      (gdouble)height / selection_height);
4080                 }
4081
4082                 cairo_surface_set_device_offset (selection_surface,
4083                                                  overlap.x - real_page_area.x,
4084                                                  overlap.y - real_page_area.y);
4085                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4086                 cairo_paint (cr);
4087                 cairo_restore (cr);
4088         }
4089 }
4090
4091 /*** GObject functions ***/
4092
4093 static void
4094 ev_view_finalize (GObject *object)
4095 {
4096         EvView *view = EV_VIEW (object);
4097
4098         clear_selection (view);
4099         clear_link_selected (view);
4100
4101         if (view->image_dnd_info.image)
4102                 g_object_unref (view->image_dnd_info.image);
4103         view->image_dnd_info.image = NULL;
4104
4105         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4106 }
4107
4108 static void
4109 ev_view_destroy (GtkObject *object)
4110 {
4111         EvView *view = EV_VIEW (object);
4112
4113         if (view->model) {
4114                 g_object_unref (view->model);
4115                 view->model = NULL;
4116         }
4117
4118         if (view->pixbuf_cache) {
4119                 g_object_unref (view->pixbuf_cache);
4120                 view->pixbuf_cache = NULL;
4121         }
4122
4123         if (view->document) {
4124                 g_object_unref (view->document);
4125                 view->document = NULL;
4126         }
4127
4128         if (view->page_cache) {
4129                 g_object_unref (view->page_cache);
4130                 view->page_cache = NULL;
4131         }
4132
4133         ev_view_window_children_free (view);
4134
4135         if (view->selection_scroll_id) {
4136             g_source_remove (view->selection_scroll_id);
4137             view->selection_scroll_id = 0;
4138         }
4139
4140         if (view->selection_update_id) {
4141             g_source_remove (view->selection_update_id);
4142             view->selection_update_id = 0;
4143         }
4144
4145         if (view->loading_text) {
4146                 cairo_surface_destroy (view->loading_text);
4147                 view->loading_text = NULL;
4148         }
4149
4150         if (view->scroll_info.timeout_id) {
4151             g_source_remove (view->scroll_info.timeout_id);
4152             view->scroll_info.timeout_id = 0;
4153         }
4154
4155         if (view->drag_info.drag_timeout_id) {
4156                 g_source_remove (view->drag_info.drag_timeout_id);
4157                 view->drag_info.drag_timeout_id = 0;
4158         }
4159
4160         if (view->drag_info.release_timeout_id) {
4161                 g_source_remove (view->drag_info.release_timeout_id);
4162                 view->drag_info.release_timeout_id = 0;
4163         }
4164
4165         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4166
4167         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4168 }
4169
4170 static AtkObject *
4171 ev_view_get_accessible (GtkWidget *widget)
4172 {
4173         static gboolean first_time = TRUE;
4174
4175         if (first_time) {
4176                 AtkObjectFactory *factory;
4177                 AtkRegistry *registry;
4178                 GType derived_type;
4179                 GType derived_atk_type;
4180
4181                 /*
4182                  * Figure out whether accessibility is enabled by looking at the
4183                  * type of the accessible object which would be created for
4184                  * the parent type of EvView.
4185                  */
4186                 derived_type = g_type_parent (EV_TYPE_VIEW);
4187
4188                 registry = atk_get_default_registry ();
4189                 factory = atk_registry_get_factory (registry,
4190                                                     derived_type);
4191                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4192                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4193                         atk_registry_set_factory_type (registry,
4194                                                        EV_TYPE_VIEW,
4195                                                        ev_view_accessible_factory_get_type ());
4196                 first_time = FALSE;
4197         }
4198         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4199 }
4200
4201 static void
4202 ev_view_class_init (EvViewClass *class)
4203 {
4204         GObjectClass *object_class = G_OBJECT_CLASS (class);
4205         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4206         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4207         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4208         GtkBindingSet *binding_set;
4209
4210         object_class->finalize = ev_view_finalize;
4211
4212         widget_class->expose_event = ev_view_expose_event;
4213         widget_class->button_press_event = ev_view_button_press_event;
4214         widget_class->motion_notify_event = ev_view_motion_notify_event;
4215         widget_class->button_release_event = ev_view_button_release_event;
4216         widget_class->key_press_event = ev_view_key_press_event;
4217         widget_class->focus_in_event = ev_view_focus_in;
4218         widget_class->focus_out_event = ev_view_focus_out;
4219         widget_class->get_accessible = ev_view_get_accessible;
4220         widget_class->size_request = ev_view_size_request;
4221         widget_class->size_allocate = ev_view_size_allocate;
4222         widget_class->realize = ev_view_realize;
4223         widget_class->scroll_event = ev_view_scroll_event;
4224         widget_class->enter_notify_event = ev_view_enter_notify_event;
4225         widget_class->leave_notify_event = ev_view_leave_notify_event;
4226         widget_class->style_set = ev_view_style_set;
4227         widget_class->drag_data_get = ev_view_drag_data_get;
4228         widget_class->drag_motion = ev_view_drag_motion;
4229         widget_class->popup_menu = ev_view_popup_menu;
4230         widget_class->query_tooltip = ev_view_query_tooltip;
4231
4232         gtk_object_class->destroy = ev_view_destroy;
4233
4234         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4235
4236         class->binding_activated = ev_view_scroll;
4237
4238         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4239                          G_TYPE_FROM_CLASS (object_class),
4240                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4241                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4242                          NULL, NULL,
4243                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4244                          G_TYPE_NONE, 2,
4245                          GTK_TYPE_SCROLL_TYPE,
4246                          G_TYPE_BOOLEAN);
4247         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4248                          G_TYPE_FROM_CLASS (object_class),
4249                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4250                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4251                          NULL, NULL,
4252                          g_cclosure_marshal_VOID__OBJECT,
4253                          G_TYPE_NONE, 1,
4254                          G_TYPE_OBJECT);
4255         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4256                          G_TYPE_FROM_CLASS (object_class),
4257                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4258                          G_STRUCT_OFFSET (EvViewClass, external_link),
4259                          NULL, NULL,
4260                          g_cclosure_marshal_VOID__OBJECT,
4261                          G_TYPE_NONE, 1,
4262                          G_TYPE_OBJECT);
4263         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4264                          G_TYPE_FROM_CLASS (object_class),
4265                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4266                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4267                          NULL, NULL,
4268                          g_cclosure_marshal_VOID__POINTER,
4269                          G_TYPE_NONE, 1,
4270                          G_TYPE_POINTER);
4271         signals[SIGNAL_SELECTION_CHANGED] = g_signal_new ("selection-changed",
4272                          G_TYPE_FROM_CLASS (object_class),
4273                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4274                          G_STRUCT_OFFSET (EvViewClass, selection_changed),
4275                          NULL, NULL,
4276                          g_cclosure_marshal_VOID__VOID,
4277                          G_TYPE_NONE, 0,
4278                          G_TYPE_NONE);
4279
4280         binding_set = gtk_binding_set_by_class (class);
4281
4282         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4283         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4284         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4285         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4286         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4287         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4288         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4289         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4290         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4291                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4292         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4293                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4294         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4295                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4296         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4297                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4298
4299 }
4300
4301 static void
4302 ev_view_init (EvView *view)
4303 {
4304         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4305
4306         view->start_page = -1;
4307         view->end_page = -1;
4308         view->spacing = 5;
4309         view->scale = 1.0;
4310         view->current_page = 0;
4311         view->pressed_button = -1;
4312         view->cursor = EV_VIEW_CURSOR_NORMAL;
4313         view->drag_info.in_drag = FALSE;
4314         view->scroll_info.autoscrolling = FALSE;
4315         view->selection_info.selections = NULL;
4316         view->selection_info.in_selection = FALSE;
4317         view->selection_info.in_drag = FALSE;
4318         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4319         view->continuous = TRUE;
4320         view->dual_page = FALSE;
4321         view->fullscreen = FALSE;
4322         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4323         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4324         view->jump_to_find_result = TRUE;
4325         view->highlight_find_results = FALSE;
4326
4327         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4328         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4329 }
4330
4331 /*** Callbacks ***/
4332
4333 static void
4334 ev_view_change_page (EvView *view,
4335                      gint    new_page)
4336 {
4337         gint x, y;
4338
4339         view->current_page = new_page;
4340         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4341
4342         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4343         ev_view_handle_cursor_over_xy (view, x, y);
4344
4345         gtk_widget_queue_resize (GTK_WIDGET (view));
4346 }
4347
4348 static void
4349 job_finished_cb (EvPixbufCache *pixbuf_cache,
4350                  GdkRegion     *region,
4351                  EvView        *view)
4352 {
4353         if (region) {
4354                 gdk_window_invalidate_region (view->layout.bin_window,
4355                                               region, TRUE);
4356         } else {
4357                 gtk_widget_queue_draw (GTK_WIDGET (view));
4358         }
4359 }
4360
4361 static void
4362 ev_view_page_changed_cb (EvDocumentModel *model,
4363                          gint             old_page,
4364                          gint             new_page,
4365                          EvView          *view)
4366 {
4367         if (!view->document)
4368                 return;
4369
4370         if (view->current_page != new_page) {
4371                 ev_view_change_page (view, new_page);
4372         } else {
4373                 gtk_widget_queue_draw (GTK_WIDGET (view));
4374         }
4375
4376         view->find_result = 0;
4377 }
4378
4379 static void
4380 on_adjustment_value_changed (GtkAdjustment *adjustment,
4381                              EvView        *view)
4382 {
4383         int dx = 0, dy = 0;
4384         gint x, y;
4385         GList *children, *l;
4386
4387         if (!gtk_widget_get_realized (GTK_WIDGET (view)))
4388                 return;
4389
4390         if (view->hadjustment) {
4391                 dx = view->scroll_x - (int) view->hadjustment->value;
4392                 view->scroll_x = (int) view->hadjustment->value;
4393         } else {
4394                 view->scroll_x = 0;
4395         }
4396
4397         if (view->vadjustment) {
4398                 dy = view->scroll_y - (int) view->vadjustment->value;
4399                 view->scroll_y = (int) view->vadjustment->value;
4400         } else {
4401                 view->scroll_y = 0;
4402         }
4403
4404         children = gtk_container_get_children (GTK_CONTAINER (view));
4405         for (l = children; l && l->data; l = g_list_next (l)) {
4406                 gint       child_x, child_y;
4407                 GtkWidget *child = (GtkWidget *)l->data;
4408
4409                 gtk_container_child_get (GTK_CONTAINER (view),
4410                                          child,
4411                                          "x", &child_x,
4412                                          "y", &child_y,
4413                                          NULL);
4414                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4415         }
4416         g_list_free (children);
4417
4418         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4419                 EvViewWindowChild *child;
4420
4421                 child = (EvViewWindowChild *)l->data;
4422
4423                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4424         }
4425
4426         if (view->pending_resize)
4427                 gtk_widget_queue_draw (GTK_WIDGET (view));
4428         else
4429                 gdk_window_scroll (view->layout.bin_window, dx, dy);
4430
4431         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4432         ev_view_handle_cursor_over_xy (view, x, y);
4433
4434         if (view->document)
4435                 view_update_range_and_current_page (view);
4436 }
4437
4438 GtkWidget*
4439 ev_view_new (void)
4440 {
4441         GtkWidget *view;
4442
4443         view = g_object_new (EV_TYPE_VIEW, NULL);
4444
4445         return view;
4446 }
4447
4448 static void
4449 setup_caches (EvView *view)
4450 {
4451         gboolean inverted_colors;
4452
4453         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
4454         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
4455         view->page_cache = ev_page_cache_new (view->document);
4456         inverted_colors = ev_document_model_get_inverted_colors (view->model);
4457         ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
4458         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4459 }
4460
4461 static void
4462 clear_caches (EvView *view)
4463 {
4464         if (view->pixbuf_cache) {
4465                 g_object_unref (view->pixbuf_cache);
4466                 view->pixbuf_cache = NULL;
4467         }
4468
4469         if (view->page_cache) {
4470                 g_object_unref (view->page_cache);
4471                 view->page_cache = NULL;
4472         }
4473 }
4474
4475 void
4476 ev_view_set_loading (EvView       *view,
4477                      gboolean      loading)
4478 {
4479         view->loading = loading;
4480         gtk_widget_queue_draw (GTK_WIDGET (view));
4481 }
4482
4483 static gboolean
4484 ev_view_autoscroll_cb (EvView *view)
4485 {
4486         gdouble speed, value;
4487
4488         /* If the user stops autoscrolling, autoscrolling will be
4489          * set to false but the timeout will continue; stop the timeout: */
4490         if (!view->scroll_info.autoscrolling) {
4491                 view->scroll_info.timeout_id = 0;
4492                 return FALSE;
4493         }
4494
4495         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4496                 (view->scroll_info.last_y < view->scroll_info.start_y))
4497                 return TRUE;
4498
4499         /* Replace 100 with your speed of choice: The lower the faster.
4500          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4501          *      based on the distance of the starting point from the mouse
4502          * (All also effected by the timeout interval of this callback) */
4503
4504         if (view->scroll_info.start_y > view->scroll_info.last_y)
4505                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
4506         else
4507                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
4508
4509         value = gtk_adjustment_get_value (view->vadjustment);
4510         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
4511         gtk_adjustment_set_value (view->vadjustment, value);
4512
4513         return TRUE;
4514
4515 }
4516
4517 void
4518 ev_view_autoscroll_start (EvView *view)
4519 {
4520         gint x, y;
4521
4522         g_return_if_fail (EV_IS_VIEW (view));
4523
4524         if (view->scroll_info.autoscrolling)
4525                 return;
4526
4527         view->scroll_info.autoscrolling = TRUE;
4528         view->scroll_info.timeout_id =
4529                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
4530                                view);
4531
4532         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4533         ev_view_handle_cursor_over_xy (view, x, y);
4534 }
4535
4536 void
4537 ev_view_autoscroll_stop (EvView *view)
4538 {
4539         gint x, y;
4540
4541         g_return_if_fail (EV_IS_VIEW (view));
4542
4543         if (!view->scroll_info.autoscrolling)
4544                 return;
4545
4546         view->scroll_info.autoscrolling = FALSE;
4547         if (view->scroll_info.timeout_id) {
4548                 g_source_remove (view->scroll_info.timeout_id);
4549                 view->scroll_info.timeout_id = 0;
4550         }
4551
4552         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4553         ev_view_handle_cursor_over_xy (view, x, y);
4554 }
4555
4556 static void
4557 ev_view_document_changed_cb (EvDocumentModel *model,
4558                              GParamSpec      *pspec,
4559                              EvView          *view)
4560 {
4561         EvDocument *document = ev_document_model_get_document (model);
4562
4563         if (document != view->document) {
4564                 gint current_page;
4565
4566                 clear_caches (view);
4567
4568                 if (view->document) {
4569                         g_object_unref (view->document);
4570                 }
4571
4572                 view->document = document;
4573                 view->find_result = 0;
4574
4575                 if (view->document) {
4576                         view->loading = FALSE;
4577                         g_object_ref (view->document);
4578                         setup_caches (view);
4579                 }
4580
4581                 current_page = ev_document_model_get_page (model);
4582                 if (view->current_page != current_page) {
4583                         ev_view_change_page (view, current_page);
4584                 } else {
4585                         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4586                         gtk_widget_queue_resize (GTK_WIDGET (view));
4587                 }
4588         }
4589 }
4590
4591 static void
4592 ev_view_rotation_changed_cb (EvDocumentModel *model,
4593                              GParamSpec      *pspec,
4594                              EvView          *view)
4595 {
4596         gint rotation = ev_document_model_get_rotation (model);
4597
4598         view->rotation = rotation;
4599
4600         if (view->pixbuf_cache) {
4601                 ev_pixbuf_cache_clear (view->pixbuf_cache);
4602                 if (!ev_document_is_page_size_uniform (view->document))
4603                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4604                 gtk_widget_queue_resize (GTK_WIDGET (view));
4605         }
4606
4607         ev_view_remove_all (view);
4608
4609         if (rotation != 0)
4610                 clear_selection (view);
4611 }
4612
4613 static void
4614 ev_view_inverted_colors_changed_cb (EvDocumentModel *model,
4615                                     GParamSpec      *pspec,
4616                                     EvView          *view)
4617 {
4618         if (view->pixbuf_cache) {
4619                 gboolean inverted_colors;
4620
4621                 inverted_colors = ev_document_model_get_inverted_colors (model);
4622                 ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
4623                 gtk_widget_queue_draw (GTK_WIDGET (view));
4624         }
4625 }
4626
4627 static void
4628 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
4629                                 GParamSpec      *pspec,
4630                                 EvView          *view)
4631 {
4632         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
4633
4634         view->sizing_mode = mode;
4635         if (mode != EV_SIZING_FREE)
4636                 gtk_widget_queue_resize (GTK_WIDGET (view));
4637 }
4638
4639 #define EPSILON 0.0000001
4640 static void
4641 ev_view_scale_changed_cb (EvDocumentModel *model,
4642                           GParamSpec      *pspec,
4643                           EvView          *view)
4644 {
4645         gdouble scale = ev_document_model_get_scale (model);
4646
4647         if (ABS (view->scale - scale) < EPSILON)
4648                 return;
4649
4650         if (view->loading_text) {
4651                 cairo_surface_destroy (view->loading_text);
4652                 view->loading_text = NULL;
4653         }
4654
4655         view->scale = scale;
4656
4657         view->pending_resize = TRUE;
4658         if (view->sizing_mode == EV_SIZING_FREE)
4659                 gtk_widget_queue_resize (GTK_WIDGET (view));
4660 }
4661
4662 static void
4663 ev_view_continuous_changed_cb (EvDocumentModel *model,
4664                                GParamSpec      *pspec,
4665                                EvView          *view)
4666 {
4667         gboolean continuous = ev_document_model_get_continuous (model);
4668
4669         view->continuous = continuous;
4670         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4671         gtk_widget_queue_resize (GTK_WIDGET (view));
4672 }
4673
4674 static void
4675 ev_view_dual_page_changed_cb (EvDocumentModel *model,
4676                               GParamSpec      *pspec,
4677                               EvView          *view)
4678 {
4679         gboolean dual_page = ev_document_model_get_dual_page (model);
4680
4681         view->dual_page = dual_page;
4682         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4683         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
4684          * preload_cache_size to be 2 if dual_page is set.
4685          */
4686         gtk_widget_queue_resize (GTK_WIDGET (view));
4687 }
4688
4689 static void
4690 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
4691                                GParamSpec      *pspec,
4692                                EvView          *view)
4693 {
4694         gboolean fullscreen = ev_document_model_get_fullscreen (model);
4695
4696         view->fullscreen = fullscreen;
4697         gtk_widget_queue_resize (GTK_WIDGET (view));
4698 }
4699
4700 void
4701 ev_view_set_model (EvView          *view,
4702                    EvDocumentModel *model)
4703 {
4704         g_return_if_fail (EV_IS_VIEW (view));
4705         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
4706
4707         if (model == view->model)
4708                 return;
4709
4710         if (view->model) {
4711                 g_signal_handlers_disconnect_by_func (view->model,
4712                                                       ev_view_document_changed_cb,
4713                                                       view);
4714                 g_signal_handlers_disconnect_by_func (view->model,
4715                                                       ev_view_page_changed_cb,
4716                                                       view);
4717                 g_object_unref (view->model);
4718         }
4719         view->model = g_object_ref (model);
4720
4721         /* Initialize view from model */
4722         view->rotation = ev_document_model_get_rotation (view->model);
4723         view->sizing_mode = ev_document_model_get_sizing_mode (view->model);
4724         view->scale = ev_document_model_get_scale (view->model);
4725         view->continuous = ev_document_model_get_continuous (view->model);
4726         view->dual_page = ev_document_model_get_dual_page (view->model);
4727         view->fullscreen = ev_document_model_get_fullscreen (view->model);
4728         ev_view_document_changed_cb (view->model, NULL, view);
4729
4730         g_signal_connect (view->model, "notify::document",
4731                           G_CALLBACK (ev_view_document_changed_cb),
4732                           view);
4733         g_signal_connect (view->model, "notify::rotation",
4734                           G_CALLBACK (ev_view_rotation_changed_cb),
4735                           view);
4736         g_signal_connect (view->model, "notify::inverted-colors",
4737                           G_CALLBACK (ev_view_inverted_colors_changed_cb),
4738                           view);
4739         g_signal_connect (view->model, "notify::sizing-mode",
4740                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
4741                           view);
4742         g_signal_connect (view->model, "notify::scale",
4743                           G_CALLBACK (ev_view_scale_changed_cb),
4744                           view);
4745         g_signal_connect (view->model, "notify::continuous",
4746                           G_CALLBACK (ev_view_continuous_changed_cb),
4747                           view);
4748         g_signal_connect (view->model, "notify::dual-page",
4749                           G_CALLBACK (ev_view_dual_page_changed_cb),
4750                           view);
4751         g_signal_connect (view->model, "notify::fullscreen",
4752                           G_CALLBACK (ev_view_fullscreen_changed_cb),
4753                           view);
4754         g_signal_connect (view->model, "page-changed",
4755                           G_CALLBACK (ev_view_page_changed_cb),
4756                           view);
4757 }
4758
4759 static void
4760 ev_view_reload_page (EvView    *view,
4761                      gint       page,
4762                      GdkRegion *region)
4763 {
4764         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
4765                                      region,
4766                                      page,
4767                                      view->rotation,
4768                                      view->scale);
4769 }
4770
4771 void
4772 ev_view_reload (EvView *view)
4773 {
4774         ev_pixbuf_cache_clear (view->pixbuf_cache);
4775         view_update_range_and_current_page (view);
4776 }
4777
4778 /*** Zoom and sizing mode ***/
4779
4780 gboolean
4781 ev_view_can_zoom_in (EvView *view)
4782 {
4783         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
4784 }
4785
4786 gboolean
4787 ev_view_can_zoom_out (EvView *view)
4788 {
4789         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
4790 }
4791
4792 void
4793 ev_view_zoom_in (EvView *view)
4794 {
4795         gdouble scale;
4796
4797         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
4798
4799         view->pending_scroll = SCROLL_TO_CENTER;
4800         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
4801         ev_document_model_set_scale (view->model, scale);
4802 }
4803
4804 void
4805 ev_view_zoom_out (EvView *view)
4806 {
4807         gdouble scale;
4808
4809         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
4810
4811         view->pending_scroll = SCROLL_TO_CENTER;
4812         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
4813         ev_document_model_set_scale (view->model, scale);
4814 }
4815
4816 static double
4817 zoom_for_size_fit_width (gdouble doc_width,
4818                          gdouble doc_height,
4819                          int     target_width,
4820                          int     target_height)
4821 {
4822         return (double)target_width / doc_width;
4823 }
4824
4825 static double
4826 zoom_for_size_fit_height (gdouble doc_width,
4827                           gdouble doc_height,
4828                           int     target_width,
4829                           int     target_height)
4830 {
4831         return (double)target_height / doc_height;
4832 }
4833
4834 static double
4835 zoom_for_size_best_fit (gdouble doc_width,
4836                         gdouble doc_height,
4837                         int     target_width,
4838                         int     target_height)
4839 {
4840         double w_scale;
4841         double h_scale;
4842
4843         w_scale = (double)target_width / doc_width;
4844         h_scale = (double)target_height / doc_height;
4845
4846         return MIN (w_scale, h_scale);
4847 }
4848
4849 static void
4850 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
4851                                                 int     width,
4852                                                 int     height)
4853 {
4854         gdouble doc_width, doc_height;
4855         GtkBorder border;
4856         gdouble scale;
4857
4858         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
4859         if (view->rotation == 90 || view->rotation == 270) {
4860                 gdouble tmp;
4861
4862                 tmp = doc_width;
4863                 doc_width = doc_height;
4864                 doc_height = tmp;
4865         }
4866
4867         compute_border (view, doc_width, doc_height, &border);
4868
4869         doc_width *= 2;
4870         width -= (2 * (border.left + border.right) + 3 * view->spacing);
4871         height -= (border.top + border.bottom + 2 * view->spacing - 1);
4872
4873         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
4874                 gint sb_size;
4875
4876                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
4877                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
4878         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4879                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
4880         else
4881                 g_assert_not_reached ();
4882
4883         ev_document_model_set_scale (view->model, scale);
4884 }
4885
4886 static void
4887 ev_view_zoom_for_size_continuous (EvView *view,
4888                                   int     width,
4889                                   int     height)
4890 {
4891         gdouble doc_width, doc_height;
4892         GtkBorder border;
4893         gdouble scale;
4894
4895         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
4896         if (view->rotation == 90 || view->rotation == 270) {
4897                 gdouble tmp;
4898
4899                 tmp = doc_width;
4900                 doc_width = doc_height;
4901                 doc_height = tmp;
4902         }
4903
4904         compute_border (view, doc_width, doc_height, &border);
4905
4906         width -= (border.left + border.right + 2 * view->spacing);
4907         height -= (border.top + border.bottom + 2 * view->spacing - 1);
4908
4909         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
4910                 gint sb_size;
4911
4912                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
4913                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
4914         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4915                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
4916         else
4917                 g_assert_not_reached ();
4918
4919         ev_document_model_set_scale (view->model, scale);
4920 }
4921
4922 static void
4923 ev_view_zoom_for_size_dual_page (EvView *view,
4924                                  int     width,
4925                                  int     height)
4926 {
4927         GtkBorder border;
4928         gdouble doc_width, doc_height;
4929         gdouble scale;
4930         gint other_page;
4931
4932         other_page = view->current_page ^ 1;
4933
4934         /* Find the largest of the two. */
4935         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
4936         if (other_page < ev_document_get_n_pages (view->document)) {
4937                 gdouble width_2, height_2;
4938
4939                 get_doc_page_size (view, other_page, &width_2, &height_2);
4940                 if (width_2 > doc_width)
4941                         doc_width = width_2;
4942                 if (height_2 > doc_height)
4943                         doc_height = height_2;
4944         }
4945         compute_border (view, width, height, &border);
4946
4947         doc_width = doc_width * 2;
4948         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
4949         height -= (border.top + border.bottom + 2 * view->spacing);
4950
4951         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
4952                 gint sb_size;
4953
4954                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
4955                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
4956         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4957                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
4958         else
4959                 g_assert_not_reached ();
4960
4961         ev_document_model_set_scale (view->model, scale);
4962 }
4963
4964 static void
4965 ev_view_zoom_for_size_single_page (EvView *view,
4966                                    int     width,
4967                                    int     height)
4968 {
4969         gdouble doc_width, doc_height;
4970         GtkBorder border;
4971         gdouble scale;
4972
4973         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
4974
4975         /* Get an approximate border */
4976         compute_border (view, width, height, &border);
4977
4978         width -= (border.left + border.right + 2 * view->spacing);
4979         height -= (border.top + border.bottom + 2 * view->spacing);
4980
4981         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
4982                 gint sb_size;
4983
4984                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
4985                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
4986         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
4987                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
4988         else
4989                 g_assert_not_reached ();
4990
4991         ev_document_model_set_scale (view->model, scale);
4992 }
4993
4994 static void
4995 ev_view_zoom_for_size (EvView *view,
4996                        int     width,
4997                        int     height)
4998 {
4999         g_return_if_fail (EV_IS_VIEW (view));
5000         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5001                           view->sizing_mode == EV_SIZING_BEST_FIT);
5002         g_return_if_fail (width >= 0);
5003         g_return_if_fail (height >= 0);
5004
5005         if (view->document == NULL)
5006                 return;
5007
5008         if (view->continuous && view->dual_page)
5009                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5010         else if (view->continuous)
5011                 ev_view_zoom_for_size_continuous (view, width, height);
5012         else if (view->dual_page)
5013                 ev_view_zoom_for_size_dual_page (view, width, height);
5014         else
5015                 ev_view_zoom_for_size_single_page (view, width, height);
5016 }
5017
5018 /*** Find ***/
5019 static gint
5020 ev_view_find_get_n_results (EvView *view, gint page)
5021 {
5022         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5023 }
5024
5025 static EvRectangle *
5026 ev_view_find_get_result (EvView *view, gint page, gint result)
5027 {
5028         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5029 }
5030
5031 static void
5032 jump_to_find_result (EvView *view)
5033 {
5034         gint n_results;
5035         gint page = view->current_page;
5036
5037         n_results = ev_view_find_get_n_results (view, page);
5038
5039         if (n_results > 0 && view->find_result < n_results) {
5040                 EvRectangle *rect;
5041                 GdkRectangle view_rect;
5042
5043                 rect = ev_view_find_get_result (view, page, view->find_result);
5044                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5045                 ensure_rectangle_is_visible (view, &view_rect);
5046                 view->jump_to_find_result = FALSE;
5047         }
5048 }
5049
5050 /**
5051  * jump_to_find_page
5052  * @view: #EvView instance
5053  * @direction: Direction to look
5054  * @shift: Shift from current page
5055  *
5056  * Jumps to the first page that has occurences of searched word.
5057  * Uses a direction where to look and a shift from current page.
5058  *
5059  */
5060 static void
5061 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5062 {
5063         int n_pages, i;
5064
5065         n_pages = ev_document_get_n_pages (view->document);
5066
5067         for (i = 0; i < n_pages; i++) {
5068                 int page;
5069
5070                 if (direction == EV_VIEW_FIND_NEXT)
5071                         page = view->current_page + i;
5072                 else
5073                         page = view->current_page - i;
5074                 page += shift;
5075
5076                 if (page >= n_pages) {
5077                         page = page - n_pages;
5078                 } else if (page < 0)
5079                         page = page + n_pages;
5080
5081                 if (ev_view_find_get_n_results (view, page) > 0) {
5082                         ev_document_model_set_page (view->model, page);
5083                         break;
5084                 }
5085         }
5086 }
5087
5088 void
5089 ev_view_find_changed (EvView *view, GList **results, gint page)
5090 {
5091         view->find_pages = results;
5092
5093         if (view->jump_to_find_result == TRUE) {
5094                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5095                 jump_to_find_result (view);
5096         }
5097
5098         if (view->current_page == page)
5099                 gtk_widget_queue_draw (GTK_WIDGET (view));
5100 }
5101
5102 void
5103 ev_view_find_next (EvView *view)
5104 {
5105         gint n_results;
5106
5107         n_results = ev_view_find_get_n_results (view, view->current_page);
5108         view->find_result++;
5109
5110         if (view->find_result >= n_results) {
5111                 view->find_result = 0;
5112                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5113                 jump_to_find_result (view);
5114         } else {
5115                 jump_to_find_result (view);
5116                 gtk_widget_queue_draw (GTK_WIDGET (view));
5117         }
5118 }
5119
5120 void
5121 ev_view_find_previous (EvView *view)
5122 {
5123         view->find_result--;
5124
5125         if (view->find_result < 0) {
5126                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5127                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5128                 jump_to_find_result (view);
5129         } else {
5130                 jump_to_find_result (view);
5131                 gtk_widget_queue_draw (GTK_WIDGET (view));
5132         }
5133 }
5134
5135 void
5136 ev_view_find_search_changed (EvView *view)
5137 {
5138         /* search string has changed, focus on new search result */
5139         view->jump_to_find_result = TRUE;
5140         view->find_pages = NULL;
5141 }
5142
5143 void
5144 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5145 {
5146         view->highlight_find_results = value;
5147         gtk_widget_queue_draw (GTK_WIDGET (view));
5148 }
5149
5150 void
5151 ev_view_find_cancel (EvView *view)
5152 {
5153         view->find_pages = NULL;
5154 }
5155
5156 /*** Selections ***/
5157
5158 /* compute_new_selection_rect/text calculates the area currently selected by
5159  * view_rect.  each handles a different mode;
5160  */
5161 static GList *
5162 compute_new_selection_rect (EvView       *view,
5163                             GdkPoint     *start,
5164                             GdkPoint     *stop)
5165 {
5166         GdkRectangle view_rect;
5167         int n_pages, i;
5168         GList *list = NULL;
5169
5170         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5171
5172         view_rect.x = MIN (start->x, stop->x);
5173         view_rect.y = MIN (start->y, stop->y);
5174         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5175         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5176
5177         n_pages = ev_document_get_n_pages (view->document);
5178
5179         for (i = 0; i < n_pages; i++) {
5180                 GdkRectangle page_area;
5181                 GtkBorder border;
5182
5183                 if (get_page_extents (view, i, &page_area, &border)) {
5184                         GdkRectangle overlap;
5185
5186                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5187                                 EvViewSelection *selection;
5188
5189                                 selection = g_new0 (EvViewSelection, 1);
5190                                 selection->page = i;
5191                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5192                                                        &(selection->rect));
5193
5194                                 list = g_list_append (list, selection);
5195                         }
5196                 }
5197         }
5198
5199         return list;
5200 }
5201
5202 static gboolean
5203 gdk_rectangle_point_in (GdkRectangle *rectangle,
5204                         GdkPoint     *point)
5205 {
5206         return rectangle->x <= point->x &&
5207                 rectangle->y <= point->y &&
5208                 point->x < rectangle->x + rectangle->width &&
5209                 point->y < rectangle->y + rectangle->height;
5210 }
5211
5212 static GList *
5213 compute_new_selection_text (EvView          *view,
5214                             EvSelectionStyle style,
5215                             GdkPoint        *start,
5216                             GdkPoint        *stop)
5217 {
5218         int n_pages, i, first, last;
5219         GList *list = NULL;
5220         EvViewSelection *selection;
5221         gdouble width, height;
5222         int start_page, end_page;
5223
5224         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5225
5226         n_pages = ev_document_get_n_pages (view->document);
5227
5228         /* First figure out the range of pages the selection
5229          * affects. */
5230         first = n_pages;
5231         last = 0;
5232         if (view->continuous) {
5233                 start_page = 0;
5234                 end_page = n_pages;
5235         } else if (view->dual_page) {
5236                 start_page = view->start_page;
5237                 end_page = view->end_page + 1;
5238         } else {
5239                 start_page = view->current_page;
5240                 end_page = view->current_page + 1;
5241         }
5242
5243         for (i = start_page; i < end_page; i++) {
5244                 GdkRectangle page_area;
5245                 GtkBorder border;
5246
5247                 get_page_extents (view, i, &page_area, &border);
5248                 if (gdk_rectangle_point_in (&page_area, start) ||
5249                     gdk_rectangle_point_in (&page_area, stop)) {
5250                         if (first == n_pages)
5251                                 first = i;
5252                         last = i;
5253                 }
5254
5255         }
5256
5257         /* Now create a list of EvViewSelection's for the affected
5258          * pages.  This could be an empty list, a list of just one
5259          * page or a number of pages.*/
5260         for (i = first; i < last + 1; i++) {
5261                 GdkRectangle page_area;
5262                 GtkBorder border;
5263                 GdkPoint *point;
5264
5265                 get_doc_page_size (view, i, &width, &height);
5266
5267                 selection = g_new0 (EvViewSelection, 1);
5268                 selection->page = i;
5269                 selection->style = style;
5270                 selection->rect.x1 = selection->rect.y1 = 0;
5271                 selection->rect.x2 = width;
5272                 selection->rect.y2 = height;
5273
5274                 get_page_extents (view, i, &page_area, &border);
5275
5276                 if (gdk_rectangle_point_in (&page_area, start))
5277                         point = start;
5278                 else
5279                         point = stop;
5280
5281                 if (i == first)
5282                         view_point_to_doc_point (view, point, &page_area,
5283                                                  &selection->rect.x1,
5284                                                  &selection->rect.y1);
5285
5286                 /* If the selection is contained within just one page,
5287                  * make sure we don't write 'start' into both points
5288                  * in selection->rect. */
5289                 if (first == last)
5290                         point = stop;
5291
5292                 if (i == last)
5293                         view_point_to_doc_point (view, point, &page_area,
5294                                                  &selection->rect.x2,
5295                                                  &selection->rect.y2);
5296
5297                 list = g_list_append (list, selection);
5298         }
5299
5300         return list;
5301 }
5302
5303 /* This function takes the newly calculated list, and figures out which regions
5304  * have changed.  It then queues a redraw approporiately.
5305  */
5306 static void
5307 merge_selection_region (EvView *view,
5308                         GList  *new_list)
5309 {
5310         GList *old_list;
5311         GList *new_list_ptr, *old_list_ptr;
5312
5313         /* Update the selection */
5314         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5315         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5316         g_list_free (view->selection_info.selections);
5317         view->selection_info.selections = new_list;
5318         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5319         g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
5320
5321         new_list_ptr = new_list;
5322         old_list_ptr = old_list;
5323
5324         while (new_list_ptr || old_list_ptr) {
5325                 EvViewSelection *old_sel, *new_sel;
5326                 int cur_page;
5327                 GdkRegion *region = NULL;
5328
5329                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5330                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5331
5332                 /* Assume that the lists are in order, and we run through them
5333                  * comparing them, one page at a time.  We come out with the
5334                  * first page we see. */
5335                 if (new_sel && old_sel) {
5336                         if (new_sel->page < old_sel->page) {
5337                                 new_list_ptr = new_list_ptr->next;
5338                                 old_sel = NULL;
5339                         } else if (new_sel->page > old_sel->page) {
5340                                 old_list_ptr = old_list_ptr->next;
5341                                 new_sel = NULL;
5342                         } else {
5343                                 new_list_ptr = new_list_ptr->next;
5344                                 old_list_ptr = old_list_ptr->next;
5345                         }
5346                 } else if (new_sel) {
5347                         new_list_ptr = new_list_ptr->next;
5348                 } else if (old_sel) {
5349                         old_list_ptr = old_list_ptr->next;
5350                 }
5351
5352                 g_assert (new_sel || old_sel);
5353
5354                 /* is the page we're looking at on the screen?*/
5355                 cur_page = new_sel ? new_sel->page : old_sel->page;
5356                 if (cur_page < view->start_page || cur_page > view->end_page)
5357                         continue;
5358
5359                 /* seed the cache with a new page.  We are going to need the new
5360                  * region too. */
5361                 if (new_sel) {
5362                         GdkRegion *tmp_region = NULL;
5363
5364                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
5365                                                                cur_page,
5366                                                                view->scale,
5367                                                                &tmp_region);
5368
5369                         if (tmp_region && !gdk_region_empty (tmp_region)) {
5370                                 new_sel->covered_region = gdk_region_copy (tmp_region);
5371                         }
5372                 }
5373
5374                 /* Now we figure out what needs redrawing */
5375                 if (old_sel && new_sel) {
5376                         if (old_sel->covered_region && new_sel->covered_region) {
5377                                 /* We only want to redraw the areas that have
5378                                  * changed, so we xor the old and new regions
5379                                  * and redraw if it's different */
5380                                 region = gdk_region_copy (old_sel->covered_region);
5381                                 gdk_region_xor (region, new_sel->covered_region);
5382                                 if (gdk_region_empty (region)) {
5383                                         gdk_region_destroy (region);
5384                                         region = NULL;
5385                                 }
5386                         } else if (old_sel->covered_region) {
5387                                 region = gdk_region_copy (old_sel->covered_region);
5388                         } else if (new_sel->covered_region) {
5389                                 region = gdk_region_copy (new_sel->covered_region);
5390                         }
5391                 } else if (old_sel && !new_sel) {
5392                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
5393                                 region = gdk_region_copy (old_sel->covered_region);
5394                         }
5395                 } else if (!old_sel && new_sel) {
5396                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
5397                                 region = gdk_region_copy (new_sel->covered_region);
5398                         }
5399                 } else {
5400                         g_assert_not_reached ();
5401                 }
5402
5403                 /* Redraw the damaged region! */
5404                 if (region) {
5405                         GdkRectangle page_area;
5406                         GtkBorder border;
5407
5408                         /* I don't know why but the region is smaller
5409                          * than expected. This hack fixes it, I guess
5410                          * 10 pixels more won't hurt
5411                          */
5412                         gdk_region_shrink (region, -5, -5);
5413
5414                         get_page_extents (view, cur_page, &page_area, &border);
5415                         gdk_region_offset (region,
5416                                            page_area.x + border.left - view->scroll_x,
5417                                            page_area.y + border.top - view->scroll_y);
5418                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
5419                         gdk_region_destroy (region);
5420                 }
5421         }
5422
5423         /* Free the old list, now that we're done with it. */
5424         g_list_foreach (old_list, (GFunc) selection_free, NULL);
5425         g_list_free (old_list);
5426 }
5427
5428 static void
5429 compute_selections (EvView          *view,
5430                     EvSelectionStyle style,
5431                     GdkPoint        *start,
5432                     GdkPoint        *stop)
5433 {
5434         GList *list;
5435
5436         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
5437                 list = compute_new_selection_rect (view, start, stop);
5438         else
5439                 list = compute_new_selection_text (view, style, start, stop);
5440         merge_selection_region (view, list);
5441 }
5442
5443 /* Free's the selection.  It's up to the caller to queue redraws if needed.
5444  */
5445 static void
5446 selection_free (EvViewSelection *selection)
5447 {
5448         if (selection->covered_region)
5449                 gdk_region_destroy (selection->covered_region);
5450         g_free (selection);
5451 }
5452
5453 static void
5454 clear_selection (EvView *view)
5455 {
5456         if (view->selection_info.selections) {
5457                 g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5458                 g_list_free (view->selection_info.selections);
5459                 view->selection_info.selections = NULL;
5460
5461                 g_signal_emit (view, signals[SIGNAL_SELECTION_CHANGED], 0, NULL);
5462         }
5463         view->selection_info.in_selection = FALSE;
5464         if (view->pixbuf_cache)
5465                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
5466 }
5467
5468 void
5469 ev_view_select_all (EvView *view)
5470 {
5471         GList *selections = NULL;
5472         int n_pages, i;
5473
5474         /* Disable selection on rotated pages for the 0.4.0 series */
5475         if (view->rotation != 0)
5476                 return;
5477
5478         clear_selection (view);
5479
5480         n_pages = ev_document_get_n_pages (view->document);
5481         for (i = 0; i < n_pages; i++) {
5482                 gdouble width, height;
5483                 EvViewSelection *selection;
5484
5485                 get_doc_page_size (view, i, &width, &height);
5486
5487                 selection = g_new0 (EvViewSelection, 1);
5488                 selection->page = i;
5489                 selection->style = EV_SELECTION_STYLE_GLYPH;
5490                 selection->rect.x1 = selection->rect.y1 = 0;
5491                 selection->rect.x2 = width;
5492                 selection->rect.y2 = height;
5493
5494                 selections = g_list_append (selections, selection);
5495         }
5496
5497         merge_selection_region (view, selections);
5498         gtk_widget_queue_draw (GTK_WIDGET (view));
5499 }
5500
5501 gboolean
5502 ev_view_get_has_selection (EvView *view)
5503 {
5504         return view->selection_info.selections != NULL;
5505 }
5506
5507 static char *
5508 get_selected_text (EvView *view)
5509 {
5510         GString *text;
5511         GList *l;
5512         gchar *normalized_text;
5513         EvRenderContext *rc;
5514
5515         text = g_string_new (NULL);
5516         rc = ev_render_context_new (NULL, view->rotation, view->scale);
5517
5518         ev_document_doc_mutex_lock ();
5519
5520         for (l = view->selection_info.selections; l != NULL; l = l->next) {
5521                 EvViewSelection *selection = (EvViewSelection *)l->data;
5522                 EvPage *page;
5523                 gchar *tmp;
5524
5525                 page = ev_document_get_page (view->document, selection->page);
5526                 ev_render_context_set_page (rc, page);
5527                 g_object_unref (page);
5528
5529                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
5530                                                       rc, selection->style,
5531                                                       &(selection->rect));
5532
5533                 g_string_append (text, tmp);
5534                 g_free (tmp);
5535         }
5536
5537         g_object_unref (rc);
5538
5539         ev_document_doc_mutex_unlock ();
5540
5541         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
5542         g_string_free (text, TRUE);
5543         return normalized_text;
5544 }
5545
5546 static void
5547 ev_view_clipboard_copy (EvView      *view,
5548                         const gchar *text)
5549 {
5550         GtkClipboard *clipboard;
5551
5552         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
5553                                               GDK_SELECTION_CLIPBOARD);
5554         gtk_clipboard_set_text (clipboard, text, -1);
5555 }
5556
5557 void
5558 ev_view_copy (EvView *ev_view)
5559 {
5560         char *text;
5561
5562         if (!EV_IS_SELECTION (ev_view->document))
5563                 return;
5564
5565         text = get_selected_text (ev_view);
5566         ev_view_clipboard_copy (ev_view, text);
5567         g_free (text);
5568 }
5569
5570 static void
5571 ev_view_primary_get_cb (GtkClipboard     *clipboard,
5572                         GtkSelectionData *selection_data,
5573                         guint             info,
5574                         gpointer          data)
5575 {
5576         EvView *ev_view = EV_VIEW (data);
5577
5578         if (ev_view->link_selected) {
5579                 gtk_selection_data_set_text (selection_data,
5580                                              ev_link_action_get_uri (ev_view->link_selected),
5581                                              -1);
5582         } else if (EV_IS_SELECTION (ev_view->document) &&
5583                    ev_view->selection_info.selections) {
5584                 gchar *text;
5585
5586                 text = get_selected_text (ev_view);
5587                 if (text) {
5588                         gtk_selection_data_set_text (selection_data, text, -1);
5589                         g_free (text);
5590                 }
5591         }
5592 }
5593
5594 static void
5595 ev_view_primary_clear_cb (GtkClipboard *clipboard,
5596                           gpointer      data)
5597 {
5598         EvView *view = EV_VIEW (data);
5599
5600         clear_selection (view);
5601         clear_link_selected (view);
5602 }
5603
5604 static void
5605 ev_view_update_primary_selection (EvView *ev_view)
5606 {
5607         GtkClipboard *clipboard;
5608
5609         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
5610                                               GDK_SELECTION_PRIMARY);
5611
5612         if (ev_view->selection_info.selections || ev_view->link_selected) {
5613                 GtkTargetList *target_list;
5614                 GtkTargetEntry *targets;
5615                 int n_targets;
5616
5617                 target_list = gtk_target_list_new (NULL, 0);
5618                 gtk_target_list_add_text_targets (target_list, 0);
5619                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
5620                 gtk_target_list_unref (target_list);
5621
5622                 if (!gtk_clipboard_set_with_owner (clipboard,
5623                                                    targets, n_targets,
5624                                                    ev_view_primary_get_cb,
5625                                                    ev_view_primary_clear_cb,
5626                                                    G_OBJECT (ev_view)))
5627                         ev_view_primary_clear_cb (clipboard, ev_view);
5628
5629                 gtk_target_table_free (targets, n_targets);
5630         } else {
5631                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
5632                         gtk_clipboard_clear (clipboard);
5633         }
5634 }
5635
5636 static void
5637 clear_link_selected (EvView *view)
5638 {
5639         if (view->link_selected) {
5640                 g_object_unref (view->link_selected);
5641                 view->link_selected = NULL;
5642         }
5643 }
5644
5645 void
5646 ev_view_copy_link_address (EvView       *view,
5647                            EvLinkAction *action)
5648 {
5649         clear_link_selected (view);
5650
5651         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
5652
5653         view->link_selected = g_object_ref (action);
5654         ev_view_update_primary_selection (view);
5655 }
5656
5657 /*** Cursor operations ***/
5658 static void
5659 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
5660 {
5661         GdkCursor *cursor = NULL;
5662         GtkWidget *widget;
5663
5664         if (view->cursor == new_cursor) {
5665                 return;
5666         }
5667
5668         view->cursor = new_cursor;
5669
5670         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
5671         cursor = ev_view_cursor_new (gtk_widget_get_display (widget), new_cursor);
5672         gdk_window_set_cursor (view->layout.bin_window, cursor);
5673         gdk_flush ();
5674         if (cursor)
5675                 gdk_cursor_unref (cursor);
5676 }
5677
5678 void
5679 ev_view_hide_cursor (EvView *view)
5680 {
5681        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
5682 }
5683
5684 void
5685 ev_view_show_cursor (EvView *view)
5686 {
5687        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
5688 }
5689
5690 gboolean
5691 ev_view_next_page (EvView *view)
5692 {
5693         int page, n_pages;
5694
5695         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5696
5697         if (!view->document)
5698                 return FALSE;
5699
5700         page = ev_document_model_get_page (view->model);
5701         n_pages = ev_document_get_n_pages (view->document);
5702
5703         if (view->dual_page)
5704                 page = page + 2;
5705         else
5706                 page = page + 1;
5707
5708         if (page < n_pages) {
5709                 ev_document_model_set_page (view->model, page);
5710                 return TRUE;
5711         } else if (view->dual_page && page == n_pages) {
5712                 ev_document_model_set_page (view->model, page - 1);
5713                 return TRUE;
5714         } else {
5715                 return FALSE;
5716         }
5717 }
5718
5719 gboolean
5720 ev_view_previous_page (EvView *view)
5721 {
5722         int page;
5723
5724         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5725
5726         if (!view->document)
5727                 return FALSE;
5728
5729         page = ev_document_model_get_page (view->model);
5730
5731         if (view->dual_page)
5732                 page = page - 2;
5733         else
5734                 page = page - 1;
5735
5736         if (page >= 0) {
5737                 ev_document_model_set_page (view->model, page);
5738                 return TRUE;
5739         } else if (view->dual_page && page == -1) {
5740                 ev_document_model_set_page (view->model, 0);
5741                 return TRUE;
5742         } else {
5743                 return FALSE;
5744         }
5745 }
5746